TECHNICAL FIELD

{ QOO lj The esest m-vention relates to flashlights mi, more particularly, to flashlights, with light focusing s s ems.

BACKGROUND ART

(00021 Some flashlights that use light-emitting diode ^' (LED) light sources are configured with light-focusing mechanisms, Ho e er, these flashli hts have drawbacks due to their focusing mechanisms that weaken the overall flashlight. For example, exemplary prior art light focusing flashlights include a. head or head pa that is mo ed relative to the main ^{■ '} Hash light body by a twisting motion, which requires the Use of two hands to perform the focus change, which makes the flashlight

cumbersome and inconvenient Furthermore, the movement of the head part or similar results in a flashlight which is more vulnerable physical ear and tear arid which is less resistant to rain, dust, saltwater and other: elements than an ordinary .flashlight. Thi is due to the fact that It Is a main part of the flashlight housing which forms the actuating part m the focusing mechanisms, and hereby the focusing mechanism and flashlight as whole may potentially not be sealed sniTiciem!y to eliminate the effect of such, elements which may cause unsatisfactory long term Issues..

1 003} Thus,, there is a need in the art for a flashlight with a focusing mechanism that allows for the change of f cus of the light without jeopardizing the durability of the Structure and the resistance of the flashlight to moisture, dost, saltwater, mud, and other caustic or otherwise harmful elements. 000 1 in a push-focus flashlight, a user holds the flashlight by the handle with one hand and focuses it by pushing the head forward artd backward to achieve focus. This can he an efficient way to focus a light, but has a number .of drawbacks* some of which include: since the focusing system I metal to metal and situated outside of the light, within a short period of time, dirt, grime _* dust and other particulate matter gets between the head and body of the ligh causin it to become more and more difficult to move the head forwards or backwards, and the general metal to metal activity over time creates small imperfections in the metals causing this issue to become wors and worse; the .focusing system d es not allow for the flashlights to be highly water resistant or waterproof; and the head must be twisted to lock the flashlight

[0005] Thus, there is a need, in the art for a flashlight with a focusing mechanism that overcomes ihe above problems and ^' al lows fo the change of focus of the Sight without jeopardizing the durability of the structure and the resistance of the flashlight to moisture, dust, saltwater mu and other caustic or otherwise harmful elements.

SUMMARY OF THE INVENTION OOiibj According to the principle of the Invention, a flashlight includes a housing having & hollow interior bound by a chamber wall having opposed inner and outer surfaces, a. lens carried by ihe boosing opposing the hollow interior, s light source supported by a light source support In the hollow Interior, and a focusing assembly for m ving the light source relative to the lens in: a longitudinal motion including a button s ably arranged n ihe outer surface of the chamber wall in magnetic

eommunlcaiioo with ^' an opposed sliding member connected to the light source support in the hollow interior and which is shdably arranged on the inner su ace of the chamber wall The light source is connected, to an energy source carried by the housing with a flexible ^■■ connection that yields between the energy source and the ligh source support in response to movement of the light source support with the focusing assembly. The flexible connection Is a flexible wire in a preferred embodiment and the energy source is a battery in a preferred embodiment A slide assembly is coupled between the inner surface ^' of the chamber wail and the sliding member for guiding the sliding member, and the light source is preferabl at least one light-emitting diode.

[0007} According to the principle of the Invention, a flashlight includes a housing having a hollo interior bound by a chamber wall having opposed inner and outer surfaces, a lens carried b the housing opposing the hollow interior, a light source supported by a ligh source support m the hollow interior, and a focusing system or assembly tor moving the .Sight source relative t the lens In a longitudinal motion including a -slidabfy arranged button in direct sliding contact with the outer surface of he chamber w ll in ma ne communicat on with opposed slidably arranged sliding member connected to the hgnt source support in the hollow interior and which is in direct sliding contact with the inner surface of the chamber wall ^' The light source is connected to a energy source earned by the housing with a flexible connection that yields between the energy source and the light source support in response to movement of the light source u ort with the ousing assembly. The flexible connection Is a flexible wire in a preferred embodiment, and the energy source is a battery in a preferred embodiment A slide assembly is coupled between the inner surface of the chamber wall and the sliding member for guiding the slidin member, nd the light source i preferably at least one light-emitting diode. OOOSj According to the principle of the Invention, a flashlight Includes a housing having a hollow interior bound by a chamber wall having opposed inner and outer surface*. km is carried by the housmg and opposes the hollow interior. The flashlight additionally includes a light .source supported by a light source located n the hollow interior. The flashlight further includes 8 focusing system or assembly tor moving the light source relative to the lens _: in a longitudinal motion which Includes a slidably arranged f rst magnet in direct sliding contact w th the outer surface of the chamber wall in magnetic communication with an opposed slidably arranged second magnet connected io the light source support In the hollow interior and which is In direct -sliding contact with the inner surface of the chamber waif The light source is connected to an energy source carried by the housing with a flexible connection thai: yields between the energy source and the ^' light source support in response to movement of the light source support with the ecusing assembly. 1st a preferred embodiment the flexible connection is a flexible wire. A slide assembly is coupled between the inner surface of the chamber wail and the second magnet tor guiding the second magnet, and the light source is preferably at bast one light-emitting diode.

[0009] Another aspect of the invention involves a flashlight including a housing including a hollow interior bound by a chamber wall having opposed inner and outer surfaces; a lens carried by the housing opposing the hollow interior; a light source supported by a movable light source support in the hollow Interior; and a focusing assembly for moving the light source relative to the te s in a longitudinal motion com rising an external movable element mova ly arranged on the outer surface of the chamber wail and coupled with the light source support in the ^' hollow Interior for movement with the external movable element. 'O IO One or more im lementations of the aspect of the invention immediately above includes one ox more of the following: a mechanical connector couples the light source support with the external movable element; the mechanical connector is a connection rod; the light source support Includes structural heat transfer features to enhance heat ^' transfer therefrom; fee light source support and the mech nical connector form a teat transfer mechanism that transfers heat away from the light ^' source and light source support; the external movable element is an- external focusing ring movabiy arranged on the outer ^■ surface of the chamber wall; the exte na! focusing ring Includes a top end and the flashlight inclu es a annular receiving section in the hollow interior a disposed radially outward from th leas, and the top end ofthe external focusing ring is movabiy disposed in the annular recei ving section; th ^' tens includes a rear hole, m4 the focusing assembly moves the light source within, the rear hole of the lens in a longitudinal motion; the rear Hole of the lens includes a irustoconiea! configuration:; the flashlight Includes a groove that the mechanical connector reciprocally slides within to enable the light source support to move with movement of the external movable element; one or more magnets couple the light source suppor with the external movable element; the focusing assembly includes an external movable element in direct sliding contact with the outer surface of the chamber wall in magnetic communication with an opposed sildahiy arranged sliding member coupled to the light■ source support in the hollow interior and which is in direct sliding contact with the Inner surface of the chamber wall; the external movable dement and sliding members are in direct radial alignment with each other: the tight source support ^' has a cup-shaped configuration; the opposed siidabiy arranged sliding member is fixed to the light source support whereby the light source support moves ^• with the opposed shdably arranged sliding member; a slide assembly is coupled between the inner surface of the chamber wall and the sliding member for guiding the slidin member: the light source includes an energy source carried by the housing and light source is coupled to he energy source with, a flexible connection that yields between the energy so rce and the light source support in response to ovement of the light source support with the focusing assembly; the flexible connection is a .flexible wire; and/or the light source comprises at least one light-emitting diode,

[001 1] Another aspect of the invention involves a flashlight comprising s housing including a hollow interior hound b -a chamber wall havi g opposed Inner and outer surfaces; _, a ions carried by the housing opposing the hollow interior; a light source com rising at least one light emitting diode supported by a movable light, source support in the hollow interior; and a focusing assembly for moving the light source relativ to the lens in a longitudinal motion com rising an external moveable element movabiy arranged on the. outer surface of the ch mbe - wall: and a mechanical eonneetor coupling the externa! moveable el men with the light source support for movement of t he l ight source support in the hollow interior akmg the inner surface of the chamber wall, by the external moveable element, the mechanical, connector and the externa! movable element defining a heat transfer meebanlsra for -transferring heat away from the light source an the moveable light source support.

[00.12} One. or more Implementations of the aspec of the invention Immediatel above includes one or more of the following: the mechanical connector is a connection rod: the external movable elemen is an external focusing ring movably arranged on th outer surface of the chamber wall; the externa! focusing ring Includes a to cad and the flashlight includes an. annular receiving section in the hollow interior and disposed ^' radially outward from the lens, and the top end of the external focusing ring is movably disposed In the annular receiving section: the lens includes a rear hole, and the focusing assembly moves the light source within the rear hole of the lens in a longitudinal niotion: wherein the rear hole of the lens includes a

ifnsioco cal configuration; the flashlight includes a groove that the mechanical eonneetor reciprocally slides within to enable the light source support to move with moveme t of the external movable element; the light source Includes an energy source carried by the housing and light source is coupled to the energy source with a flexible connection that yields between the energy source and the light source support m respons to mo emen of the tigh source sup rt with the focusing assembl ; and/or the flexibl connection, is a flexible wi ,

1 1 3 A still further aspect of the invention involves a flashlight with a twist push, light focusing system that translates forward and backward longitudinal movement of a locus member or ring to rotational and longitudinal movement of a support for a light source and/or lens to achieve f cus _*

[0014] Another aspect of the invention involves a twist push light focusing system for a flashlight comprising a locus member movable in a longitudinal direction of the flashlight; & light source; a focu lens; & rotationaS-to-fongitudinal movement translation mechanism operably coupled to t he focus member a d at least one of the sight source and the focus lens to translate longitudinal movement of th focus member lato rotational movement in the rotational-to-longiindinai movement translation mechanism and relative longitudinal movement between the lig.hr source and the i e s lens to achieve focus. fOGl Sj One or more implementations of the spect of the invent on, described immediately above include one or more of the following: the rotstiona!~to- lorsgiiiidinai movement translation mechanism includes a movable. support coupled to the light source, and the light sou ce is movable with the movable support the movable support is rotatably and longitudinally movable; the movable support is annular and includes an outer surface and the locus, me ber is annular and includes an inner surface; the outer surface of the movable support includes at least, one of one or more guiding pins and one or more diagonal tracks and the inner surface of the meti member includes at least one of one or more guiding pins and one or more diagonal tracks, wherein the one or more guiding pins ride within the one or more diagonal tracks to impart rotational and longitudinal movement in the movable support; the rotatlonal-to-longiUidinal movement translation mechanism includes a movable support coupled to the focus lens, and the focus lens is movable with the movable support; the movable support is roiaiahly and longitudinally movable: the movable support is annular and includes an outer surface and the focus .member is annular and includes an inner surface; the outer surface of the movable support includes at least one of one or more guiding pins and mm or more diagonal tracks and the Inner surface of the focus member i cludes at least one of one or more guiding pins, and one or more diagonal tracks, wherein the one or mo guiding pins ride within the one or more diagonal, tracks to impari rotational and longitudinal movement in the movable support; a flashlight including the twist push light focusing system described above,, comprising: a body carry ing the movable locus member: a flashlight bead carrying the light s urce and focus lens, wherein the roiatlonsl-to- fongimdina] .movement translation ineehanism translates longitudinal movement of the focus member Into rotational mo ement in the rotaiional o ongitudinai movement translation mechanism and relative longitudinal movement between the light source and the focus lens to achieve focus; and/or a method of using the BashHght described above, comprising; oldin the Ilashiighrby the. body with one's hand; with a. thumb of the same hand holding body of t e flashlight imparting longitudinal movement in the f cus member: with the ro&moHaRo-iongiiadmai movement translation mechanism translating longitudinal movement of the focus member into rotational movement in the rotaiional o-lon.git d I movement translation mechanism and relative longitudinal movement between the light source and the focus lens to achieve focus.

BRIEF DESCRIPTION OF THE. DRAWINGS

[0016 Referring, to the drawings:

(0017] FIG. 1 is a schematic cross section of a flashlight constructed and arranged in accordance with the principle of the invention;

(00181 FIG. 2 is a side elevation view of the flashlight of Fid, I showing a flashlight housing with & button;

[0 19] FIG, 3 is a fragmented section vie w of the flashlight of FIG. i illustrating the button moved toward a lens of the flashlight- to achieve a first fbens ^' state of the ^■ flashlight; [0020] FK ^' i 4 h a view similar to that of FKI 3 illustrating the button mov d sway from t e leas of he flashlight to achieve- a second focus- stat of the flashlight; f 02.1 J FIG. 5 is a section view taken along line 5-5 of FIG,. 2:

[0022] FIG. 6 is 8 section view taken alon line 6-6 of FIG. 5;

(0923] F I 7 is a cross-sectional view of another embodiment of a focusing assembly for s -flashl ght;

[002 f FIG. 8 is a partial cross-sectional view of the focusing assembly of FIG. ^' ?;

[0025] FIG, 9 Is a side eievational ew of another embodiment of a focusing assembly for a flashlight:

(§ø¾>] FKI. HI is a cross-sectional ie of the focusing assembly and flashlight of FIG. 9:

|0037] FIG, 1 1 is & cross-sectional view of a ^' - flashlight head rachidiug an embodiment of a twist push light focusing system;

(O.02SJ FIG, 12 is a perspective view of an embodiment of a roiatab!e lens support of the twist push light focusing system;

[00291 FIG, 13 is a partial eross-sectlona! vie w of an outwardly extending pin and a inwardly extending guide track of an alternative embodiment of a twist push light focusing system:

10030] FIG, 14 is a .partial cross-sectional view of a further embodiment -of a twist push light focusing system where the light source moves .relative to the focus lens.

DETAILED DESCRIPTION

[0031 ] Turning now to the drawings, in which like .reference characters indicate corresponding elements throughout the several views, attention is fust directed to FIG, 1 and m relevant part to FIG. 2 irs which there is illustrated a flashlight I constructed and arranged in accordance with the principle of the invention including a

<s substantially cylindrical housing 2 with an outer side or. surface 3, a hollow chamber or interior 4, a body ox body part 5, and an opposed head or head part 6, in the present embodiment, head pari 6 and body part S are cast in one piece. Bousing 2 has opposed first and second ends 7 and 9. First end 7 Is part of the head or head pa 6, and second end 9 is part of the body or body part 5. At a first end ? of housing there is a lens 8. Lens 8 in the present e ample is fixed relatively to housing 2 and can, for example, he glued, welded or otherwise sealed and fixed in first end 7 of housing 2, Second end 9 may be lilted with electrodes (not shown) to enable recharging of a battery 10 located Irs hollow interior 4 of body pari 5 of housing 2- Second end 9 can also be fitted with mechanism for turning flashlight I ON and OFF,

[00321 Head part 6 of hollow interior 4 of housing 2 contains a light assembly consisting of a light source 1 1 arranged on and carried by a light source support 12. Light source support 12 is a circuit board that controls light source i I . Flashlight I is fashioned with a focusing system or assembly for moving light 1 1 source relatively to lens § In a longitudinal motion or otbes-wise in reciprocal backwards add forward directions with respect to lens S, Light sotrree support 12 is connected to opposed identical inner sliding members denoted generally at I SA and 13 , re speed veiy, which form pa of the focusing assembly of flashlight I , Sliding members I 3A and 138 are part of ^' iight source support 2 and are slktebly arranged in that they are engaged in corresponding identical slide assemblies 14A and 148 formed between sliding members 13 A- and 138 and a chamber wall I S of hollow interior 4 of head pari 6, Slidin : members .13 A and Oil are Identical, and only the specific details of sliding member I 3 A are discussed in the detail below with the understanding that the ensuing discussion of sliding member 1 A applies In every respect to sliding member 13.8; Slide assemblies 14A and 14B are also identical aod only the details of slide assembly 1 A will be discussed with the understanding that, the discussion below of slide assembly 14A applies in every respect to slide assembly 148.

10033] Chamber wall 15 of head part 6 is part of housing 2, and has an inner surface 1.5 A facing hollow interior 4 and an opposed outer surface S.5B, Slide assemblies 14A and 14B are positioned between chamber wall 15 and sliding members I 3A and 138, respectively, and sliding members 13 A and 130 of light source support. 1 are slidahiy arranged on inner surface ISA of chamber wall I S with slide assemblies 14A and 148 in this preferred em im nt In the present embodiment of flashlight I , at least a part of inner sliding member 13A Is a magnet 16. in flashlight 1, magnet 1 is in magnetic eotatnunicatioft with an opposed outer button J 7. Because alt least a part of sliding 30 member OA is magnet 16 and because magnet 16 s a part of sliding member 13A _S sliding member OA is in magnetic communication with button 17. Sutton j 7 is a magnet, and is slidablv arranged on enter surface 3 of .flashlight 1 , Hollow interior further includes a flexible connection or connector I S far providing electrical, c ntact between light source 1 1 and battery 10 via a connector plats arranged about battery 10. Connector plate 9 is a circuit board in a preferred emhodtmeijt, and flexible connector I t extends between and is electrically connected between, on tbs one hand, light source I t and light source support 12, and; on -the other hand, connector late i 9. Li ht source 1 1 is connected the battery 1 ø energy source carried by housing 2 with flexible connection or connector 18 that according to the invention, yields between the energy source formed by battery 10 in the preferred embodiment and light source support 12 in response io -movement of light source support 12 with the Ibensing assembly of flashlight I .

{0034] FIG. 2 shows flashlight I and button .17 as known, from, lash light I in FIG, 1 , Button .17 is received in and engages and is held by a button guide 20 formed m or otherwise embedded In outer surface 3·. Button guide 20 is a slotted channel that is farmed in housing 2 between outer surface 3 of housing 2 and outer surface 15 of ehandser wall 15 of housing 2, and button .17 is received by the slotted channel forming button guide 20, and button guide 20 allows button 1 / to be moved in a reciprocal directions relative to lens S and first end 7. which is a linear motion of button 17 backwards and forwards relatively to first end 7 and lefts S along an axis parallel to the longitudinal direction of substantially cylindrical housing 2, The backwards/forward motion of button 17 Is indicated fey double arrowed line A in FIG. 2. When button I? is moved as indicated by arrowed line light source 1 1 and light source support 12 in hollow interior 4 w ill together move in a corresponding motion a the magnet ic interaction between button 17 and .magnet 16 of the inner sl iding member OA of light source support 12 forces the parts to move concurrently together, according to the principle of the invention. When light source 1 1 this way is moved relatively to lens 8 the focus and light cone through lens 8 of flashlight I mil change correspondingly.

10035] Looking to FIGS. 5 and 6, button 17 has an exterior pari 17A received on and extending outwardly from outer surface 3 of housing 2 so as to be accessible for moving, such as by a t umb or other finger of the hand ofa ser gripping e,.g. body part 5, and button 1 extends inwardly through outer surface 3 of housing 2 from exter part 17 A to an opposed inner part 17B located in button guide 20 in housing 2 wh ch, x ex lained above, is a slotted channel. Inner pa ! 7B of button 17 is received k and engages and is held by utton guide 20. Exterior part 17 A of button. 1 is located exteriorly of housing 2 and is used to move button 17

backwards/forward, such as by a users finger Inner part 78 of button 17 is located interiorly of housing 2 and slides through button guide .20 w hen button I ? is moved backwards/forward. Inner part Γ7. of button 17 in button guide 20 is received In direct contact with outer surface 15B of chamber wail of housing 2. and .remains in dlteei contact with outer surface. I, S of cham ber wall 15 of housing 2 when stationary and also when button 15 is slid/moved backwards/forwwd s i indicated by double arrowed line A in FIG, 2 Inner part Γ7Β of button 1 7 slides directly against and remains in direct contact with outer surface I SB of chamber wall 15 .of housing 2 when button ! ? Is slid or otherwise moved backwards and forward.

{ _. 0036;) Magnet 16 of sliding member 13 A in hollow interior 4 opposes inner part 17B of button I ? and is i direct contact w¾th inner surface 15 A of chamber wall 15 of housing 2 Opposing Inner par 78 of botton 1 1 in direct contact with outer surface I 5B of chamber wall 15 of housing 2 thus magnetically coupling magnet 16 of sliding member I 3A of light source support 12 to the inner part 170 of button. 17 through chamber w¾!l 15. Sliding members 13A and I3B engage slide assemblies I4A and !4B, respectively, and slide there along to permit light source support 12 and light source 1 1 carried by light source support 1 to move backwards/forwards relatively to lens 8 In response to the baekwardsfibtward motion of button 1 as indicated by double arrowed line A in FIG. 2. The magnetic coupling betwee inner part 17B of button 17, irs direct contact with outer surface 158 of chamber wail 15, and opposing π magnet 16» direct, co tact with inner surface I SA of chamber wall 15, of sliding member BA causes the light assembly consisting of light source support 12 and light source 1 1 carried by .light source support 12 to move backwards/forwards relati vely to first end 7 of housing 2 and l ns 8 in response to the backward s/iorward motion of button J ?, according la the principle of the Invention. The application of inner part 1 ?B of button 1 7 in direct contact with, outer surface 158 of chamber wail 1 5 opposing magnet 16 In direct contact wlth inner snrfa.ee I SA of chamber wall 15 ensures, a magnetic coupling persists between, button I 7 and light source support 12 io provide a reliable and persistent magnetic coupling there between to provide the beneficial result of a persistent and concurrent backwards/forward movement of button 17 and light source 1 1 ρ flight, source support 12 relatively to lens .

10037 Magnet 16 Is received in irect contact with inner surface I SA of chamber wall 15 of housing 2, and remains In direct contact with inner surface 15 A of chamber wall 15 of housing 2 when stationary and also when light source support 12 is moved backwards/forward with the h&ckwards/fbrward motion of button 17 a is Indicated by double arrowed line A in FfG. 2< Magnet 16 carried by light source support 12 slides directly against and remains in direct contact with Inner ^' Surface 15 A of chamber wail .15 of housing 2 when t on 17 is moved backwards/forward- Thus ^' according to the principle of the invention, the focusing assembl of flashlight I tor moving light source 1 1 relative to lens 8 In a longitudinal motion, namely, backwards/forward relatively to lens , includes slidsbly arranged inner part 17fi which is a magnet of button 1 7 in direct sliding contact with the outer surf ace 15B of chamber wall 15 In magnetic coninunucation with opposed sudably arranged magnet 16 connected io light source support 12 in hollow interior 4 and which magnet 16 is In direct sliding contact with inne ^' surface I SA of chamber wall 15. Sliding member I3B Is identical to slide assembly I3.A and functions in the same way except without the interaction with a magnet button as with sliding member 1 A. However, sliding member 1 B may be associated, with a corresponding magnet button, such as button 17 or an extension of button 17 in alternate embodiments.

[0038] booking to FIGS. 5 and 6 in relevant part slide assembly 14 A formed between sliding member B and Inner surface I SA of chamber wail 15 of housing 2 i.n holiow interior 4 of head part 6 nsis s of a tongue and groove assembly including a tongue 20 30 and a corresponding groove 3 i , both of which are elongate and extend longitudinally along the longitudinal direction of flashlight 1 in hoi low interior 4 of head part 6 and permit and guide the sliding b&ekwards fomard motion oi lsght source support 12 and thus light source 1 1 with respect to lens 8 in response to the backwards/forward motion of button 1 7 caused by the magnetic. coupling between button 1 ? and sliding member 13 A am more specifically, between, button .17 and magnet 16 of sliding member 13 A. in the preferred embodiment, tongue 30 is formed in or otherwise with nne surface ISA of chamber wall of housing I , and groove 3 ! is .formed in sliding member 13 A. Sliding member .13 A consists of magnet 16 carried by a lug 40 connected to light source support 12. g t source support 12 has an outer or

30 distal marginal extremity I 2A (FIG. 5} near inner surface 15A, and lug 40 has an ^• upper part 40A attached to this marginal extremity ! 2A and depends from O ls marginal extremity 12A to lower art 4GB f lag 40. Lug 40 is preferably formed integrally with light, source support 1 , and in an alternate embodiment may be affixed to light source support 12 with adhesive, welding, etc.. Lug 40 extend downwardly from li ht source support 12 to lower part 40B in a direction toward connector plate 10 referenced in FIGS., I . 3. and 4, and confronts and is near inner surface I SA of chamber wall 1 . Magnet 16 is positioned between lug 40 and inner surface 1 5 A of chamber wall 1 and Is fitted within a recess 41 formed m lug 40 between upper and lower parts 40A and 40B, and is held by lug 40 and is received in direct contact with inner surface 15 A of chamber wall 15. Magnet 16 is press fit in recess 41, and may he additionally or optionally secured in place with adhesive, one or more rivets or other form of mechanical fastener, or the like, if so desired. Groove

3 1 Is formed in sliding -member I3A, in which groove 31 is formed in and extends through marginal extremity I 2A of light source support 12 and then through upper pari 40A of lug 4 and further through .magnet 16 and finall through a lower part 40B of lug 40, Groove 31 accepts tongue 30, and is f ee to slide along tongue 30 in the backwards forward motion -of light source support 1.2 in response to the backwards/forward motion of button 1 7. Although in she preferred-embodiment tongue 30 is formed in inner surface I SA. of chamber wail of housing I and groove 31 is formed in sliding member 1 A, groove 31 may be formed in inner surface 1 5 A of chamber wall of housing 1, and tongue 31 may be formed with sliding member OA.

|0039] FIG, 3 is a fragmented section view of the flashlight 1 illustrating button 17 pushed in a direction towards lens & to move light source 1 1 dose to lens 8 to achieve a first focus slate of light generated by light source 1 1 of flashligh L PIG. 4 is a view similar to. that of FIG, 3 illustrating button .1 ? p shed' In s direction away from lens 8 to -move light source 1 ! way bom. lens 8 to achieve a second focus state of light generated by light source 1 1 of -flashlight I . As a matter of example, the second focused state is a. more narrowed focused state than the first focused state,. and t is is a function, of lens 8 and the corresponding distances between lens 8 and. light, source 1 i .

{ (K)4 j According to the principle of the invention sod referencing FIGS. 1-6 in relevant part, flashlight 1 includes housing 2 ^' having hollow interior 4 bound by chamber wail 15 having opposed inne and outer surfaces I A and I SB. a leas 8 carried by housing 2 opposing hollow interior 4. a light assembly in hollow Interior 4 consisting of light source ! 1 supported by light source support 12, and a focusing assembly for moving light source I I relative to lens & in a longitudinal motion includin button 17 slidably arranged on outer surface 158 of ^' chamber wall 15 In magnetic ^' communication with opposed sliding member Ϊ 3Α connected to light source suppor 12 in hollow interior 4 and which is slidably arranged on inner surface I SA of chamber wall 1.5. bight source i I Is connected to an energy source earned by housing 2 with flexible connection, or connector 1 8 thai yields between the energy source and light source support 12 in .response to movement of light source support 12 with the focusing assembly. The flexible connection .18 is a flexible wire in a preferred embodiment, and the energy source is battery 10 in a preferred embodiment.. Slide assembly I A is coupled between tuner surface I5A of chamber wall 15 and sliding member OA for guiding sliding member 13 A, and light source 1 1 is preferably at least one light-emitting diode. 0041 In another aspect according to the principle of the invention and again referencing FIGS. l~6 in relevant parh flashlight I includes housing 2 having hollow interior 4 bound by chamber wall 1 having opposed inner and outer surfaces 15A and I SB. a km 8 carried by housing 2 opposing hollow interior a light assembly m hollow nterior 4 consist ng of light source ! 1 supported by Iight source support 12. and a focusing assembly tor moving light source 1 1 relative to lens S in a longitudinal ^• motion including slidably arranged button 17 in direct sliding contact with outer surface 1 .8 of chamber wall 15 in magnetic communication with opposed slidably arranged ^■ sliding member 13.Λ connected to light source support 2 in hollow interior 4 and which is i direct sliding contact with inner surface 1 A of c mber wail 15. L- gbi source 1 1 is connected to an energy source carried by housing 2 with flexible connection or connector 18 thai yields between the enemy source and light source support 12 in response t movement of Iight source support j 2 with the focusing assembly. The flexible ^' connection .18 is a flexible wire in a preferred embodiment, and the energy source is battery 10 in a preferred embodiment Slide assembly 14. A is coupled between inner surface ISA of chamber wail 15 and sliding member 13A for guiding sliding member 13 A, and light source 1 1 is preferably at least one light emitting diode.

1004-2] in yet another aspect according to the principle of the invention and yet again with efere ce to FIGS. 1 -6 in relevant part flashlight I includes housing 2 having hollow interior 4 hound by chamber wall 1 having opposed inner and outer surfaces ISA and 1SB. Lens 8 is carried by housing 2 and opposes hollow interior 4. Flashlight additionahy ineludes !igbt source 1 1 supported by light source support 12 located in hollow Interior 4. Flashlight 1 is formed with a. focusing -assembly for moving light source 1 1 relative to lens 8 in. a longitudinal motion which includes a slidably arranged first magne of button 17 in direct sliding contac with outer surface I SB of chamber wall 15 in magnetic communication with an opposed slidably arranged second magnet 16 connected to light source support 12 in hollow interior 4 and which is in direct sliding- contact with inner surface I SA of chamber wall 15, Light source 1 1 is connected to an energy source carried by housing 2 with flexible connection or connector 1 S that yields between the energy source and light source support 12 in response to movement of light source support 12 with the .focusing assembly. In a preferred embodiment flexible connection IS is a flexible wire. Slide assembly 14-.A is coupled between inner surface I SA of chamber wall 15 and the second magnet 16 ^' connected to tight source support 12 for guiding the second magnet 16, and light source 1 1 is preferably at ast one light-emitting diode.

[0043] With continuing referencing FIGS. 1-6 in rel vant part, flashlight 1 is easy to use with one hand, is sturdy and highly durable, and is water an element resistant, and also preferably waterproof These and other advantages are provided by the present invention in that flashlight 1 includes housing 2 having outer side or surface 3 and an at least a partly hollow chamber or nteri rs namely, the chamber or hollow interior 4, As described above, flashlight 1 has lens S, light source 1 1 with light source support 2, and a focusing assembly for moving light source 1 1 relativel to lens 8 in a longitudinal motion, wherein the focusing assembly include slidably arranged button I ? exteriorly of housing 2 or otherwise on the outer side of housing 2 in. communication with inner sliding member 13A -connected to light source support 12 in hollow interior 4. A flashlight arranged in this manner has an advantage that- the moving parts mainly re inside hollow interior 4 and thus less liable to be impacted -by dust, water, salt or freshwater, mud and ther -m te i ls -or particles which may amage the moveable parts, or may obstructing motion of the moveable pans i.e. inner sliding member -13 A connected to light source support 1 in hollo interior 4.. The moveable part found on outer surface 3 -of housing 2 i.e. button I ? ^' may be simple, and. arranged in order to be easy o clean in ostler to avoid nmifxuiedon. Also the. special focusing assembly leaves very limited or no access for e.g.. dust or moisture from the outer side to any vital parts inside hollow interior 4. Such vital parts can be e,g. battery 10, circuit boards -e.g. light source support. 12 and connector plate 19 and/or wires og. connector 1 It

10044] The word "button" is in the present application used for an actuator which does not form a part of the actual flashlight housing. Button 17 may have a variety of shapes and sizes e.g. a simple rectangular shape or a curved shape fitting on or around past of housin 2 of flash Sight 1.

10045 j Button I ? can be arranged to ensure a mirun um of friction with the movement of button 17, Button 17 can also be arranged with one, two. three or more selected positions wherein button 17 may be locked lati e y to housing 2 ^' of flashlight 1 whereby the locus of flashlight I is looked.

[0046] When button j 7 of flas li h 1. s moved backwards or forwards alon the longitudinal direction of flashlight L inner slidin member 13 A of light source support I 2, and thus also inner sliding member I3B of light source support 12, will follow motion together with light source 1 1 , ^' The .motion of tight source 1 1 towards and away from lens 8 thus Induced by the motion of button i 7, changes the focus and or angle of the light cone &om flashlight I, Thus, whe a user slides button 17 in a direction away from lens S, as in FIG. 4 _> light source 1 Ϊ is moved away from lens 8 to ac h ieve a focu ed stat of the I igbt generated by l ight source 1 1 _> and hen the s r slides button 17 m a motion in the direction towards lens g, as in FIG. 3. light source I l is moved towards lens 8 to achieve a different focused state of the light generated by light source 1 1.

[004/] inner sliding members I 3A and 1 8 are connected to light source s port 12, and form an Integral part of light source support 12 in a particular embodiment.

{00 $T| In preferred embodiment, button 17 is a magnet and is I« a nsagnetle eonnnunicatlon conphng with inner sliding member 13A. When button 1.7 on the outside. f housin 2 of flashlight | interacts with inner sliding member 1 3Λ by magnetic, attraction, housing 2 .has no, and need no have, perforations for elements providing physical communication between button 17 and inner sliding member OA. When the provision of perforations is avoided, intrusio of damaging elements such as water, salt, m ud, etc., into housing 2 of .flashlight I is eliminated,

|O049] ^' . As button 17 and at least a part of inner sliding member 13 A are each a magnet or consist of a magnet or otherwise a magsetlsahie material being

characteristic of a magnet according ¾ the teachings of invention, it is possible to move light source 1 1 back and forth relatively to lens 8 by slidin button 1 1 back and forth. In an alternative embodiment not only is it possible to cause light source 1 1 to reciprocate hack and forth relative to lens 8 by imparting reciprocal movement to slidin button 1 1, but light source 1 1 is rotated b causing rotation of sliding button 1 1 abo an drcum&ftuiee of the flashlight body 5, Rotational movement, of the sliding button 1 1 causes inner sliding member 13 A o rotate in a similar manner relative to the flashlight body 5, This cause light support 12, and, hence, light source 1 1 ia rotate.

[00501 The magnetic- commankation between button. 17 and light support 12 enables a flashlight wherein the focusing assembly does not compromise the resistance of flashligh ! against e.g. fluids or dust as no openings in housing 2 of flashlight 1 for ommunication between button 17 and inner sliding member I 3 _. A are required. Embodiments with a magnetic button 17 are sturdy, durable and efficient alternatives to known fbensing mechanisms where vulnerable seals may fee required when the focus is achieved by movement of the head of the flashlight if the .flashlight is to be waterproof

[0051 ] Slide assemblies l 4A and MB guide sliding members OA and md provide the stability of the focusing assembly and ensures a smooth change in iscus of the light generated, by light source 1 1 Inner sliding members I SA and 13 and hereby light scarce 1 1 are guided by slide assemblies 14A and 14B In its baek-and- form motion as button 17 is moved bsek<and--t½wards. to change the focus of flashlight 1.

|00S2| Prefhm ly, bousing 1 and lens 8 are arranged to together form a waterproof unit.. Such « waterproof unit is possible as lens 8 and housing 2 of flashlight I. can he fixed relatively to each other as the focu of ilashiight I is -adjusted by movement of light source 1 1 in the at least pertly hollow interior 4 induced by button 1 , and this i in con trast to kno wn flashlights where a part of the housing, e.g... a bead part, containing the lens, s moved relatively to the main, body of the flashlight housing,

(0033] In advantageous embodiments, flashlight 1 is rechargeable, and waterproofing can b -further enhanced since there is no or limited need fo easy access to hollow- interior 4 of housing 2 of flashlight 1 , as required when traditional batteries needing regular change .are used. Thus none or a nnnimum of parts, which may he potentially cause leakage of fluid or dust to hollow interior 4 of flashlight 1 , are necessary, [0034] Light source 1 1 is an LED in a preferred embodiment, \ LED has a very long lifetime sad low energy consumption. Due to the long li etime of an LED, there is oo need for frequent access to the part of hollow interior 4 containing light source 1 1. and thus limited access opening is needed, in an alternate embodiment, light source 1 1 can be a plurality of LEDs without departing from the invention,

[0055] All in ait flashlight I which to a very high degree is waterproof is facilitated by the present invention, The ^' magnetic contra! embodiment of the foensmg assembly requires no openings n housing 2 of flash light 1 to facilitate the communication between .button .17 "and inner sliding membe 13 A. Because access light source 1.1 and/Or energy storage (such as battery .10) in hollow Interior 4 of boosing 2 is nly rarely- required, such access may be th ough specialized openings. Such specialized openings can he equipped with or form highly efficient seals, in some enibodioients _* parts which may form or provide the aterproofing of flashlight I may be arranged to be opened by trained persons and/or specialized tools nly, in order to keep the waterproofing at a maximum at all times,

[005b] Thus according to the present invention, flashlight 1 which is efBekntl waterproofed is provided and therefore flashlight I may advantageously be used as a diving light,

|00S7] Flashlight I can also be used in outer challenging situations where its excellent durability and stardh ess is an. advantage. This may be in. environments with mud, sand, salt, oil, etc, where the advantageous focusing assembly can: ensure that the focus function of flashlight 1 ma be maintained at all times as it may be easy to clean. Furthermore, magnet or magnetisabk button Ϊ 7 In magnetic . communication with inner sliding member 13 A provides ability to change focus of flashlight I.

without jeopardizing the waterproofing of flashlight f005S] Preferably, light source I I is connected to - ^' an energy source arranged in hollow interior 4 with a flexible connection, namely, connector I S, Connector I S provides the energy supply to light source 1 1 and is electrically connected between light source 1 1 and the energy soarce, namely, battery 10. Battery 1 is housed in the interior oi ^" housing 2 of flashlight I and only light s urce 1 I with light source support 1 is moved to change the focus of flashlight I in response to she movement of button 17.

I 0059] The flexible connection formed by connector 18 can e.g. be a spring, a soft and flexible wire or a moveable pin which allows the back and forth .movement: of light .sou ce I L In a efe red embodiment, connector I S is a soft and flexible and durable wire thai provides a constant connection without the application of the f rce s.g, a spring may provide on the movement of light so ce 1 1. A soft wire forming connector 18 Is preferably strong and of a material which, does nor get weakened by the back, and forth -movement of the light source and such soft wires are well-known to those skilled In the art. and such electrical wires and are readily vailable,

[0060] A spring Can be osed advantageously if e,g. the most frequently used focus of flashlight I Is achieved with light source I 1 m. sis position where it is closest to lens S. in this case, the focus may be changed frorn said frequently used focus, which Is an unforced position (the spring is relaxed), by sliding button \ 7 and hereby inner sliding member I SA and light source 1 .1 and light source support 12 in the direction awa from- lens § by application of a force strong enough o compress the spring until the needed focus Is achieved. When the force on button I ? is released, light, source 1 1 .and hereby also light source support 12 and button 1 7 may be returned to the unforced position closest to lens 8 by the force of the compressed spring.. The spring may be soft so that only a slight force is needed to compress it and that the movement hack to the unforced, position is slow and soft The spring may also e.g. be harder requiring a stronger force and providing a last repositioning to the unforced position. The spring can also e.g. be configured to that the relaxed state is achieved with light source 1 1 in its position where it is furthest away from lens g, j OOb l A preferred lens 8 used in flashlight I according to the present invention may eg. be various collimator lenses, "half moon" lenses, or can be designed according to the specific LED light source model as weil as die specific output modes that needs to be achieved with each flashlight model. [0062] In alternative embodiments, the button I ? may be replaced by an alternative external light source motion controlling .mechanism, such as, but not limited to the focusing rings 102, 202 shown and described with respect to FIGS. 7- 10 below.

| 3] With reference to FIGS, 7 and 8, another embodiment of a focusing assembly 100 of a flashlight 101 will be described. Similar elements to those shown and described above with respect to FIGS. I -6 will be shown and/or described with like referenc numbe s, but with an "a" snffix., and the subject matter described with respect to the other figures in the present application is incorporated herein, in the embodiment shown, the optical lens. Sa is specifically configured to enable the proper light beam tor different focusing states of the focusing assembly 1 0,

[0064] The focusing assembly i 00 is controlled is a similar manner to that shown and described above with respcei to. Fi S. 1 -6, except the focusing assembly 1 0 Is onmagnetic (i.e., does not Include magnetk/magnetisable elements for translating motion of a button on an outside of the flashlight body into motion of a LED within ¾ hollow chamber inside the flashlight body). Instead, the focusing assembly 100 includes a focusing rin 1.02 directly connected to a light source support 12a through a mechanical coupler, arm, or focusing ring connection rod 1.04,

|0065] The focusing ring 102 cirenmf erentialiy surrounds an outer surface 3a of the flashlight body Sa and reciprocally and slldabl moves in a longitudinal direction of the flashlight 101 in the direction of the arrows shown. The focusing ring 1 2 Is substantially cylindrical and may include one or more protruding, segme s 100 or other external features in a lower ring portion 108 and include an in wardly extending top end 1 1 In an. upper r g ^' portion 1 12. The inwardly extending top end 1 10 is snovably disposed within an annular upper ring receiving section 1 14, which Is disposed ^' within hollow interior 4a, radially outward from lens 8a.

[00661 The light source support 12a is cup-shaped and includes a flat circular top surface or base 1 16 that supports the light source (e.g., LED) I la and an annular bottom section or wail 1 18: includes . side hole .120 that receives the focusing rin connection rod ^' 1 4. The connection rod 104, which directly connects the external

2 i focusing ring 1 2 to the- light source support 1:2a, reciprocally slides within a groove 1 13 of the body 5a to enable the light source support 12a to mo e with m ement of the ext rnal focusing ring 102-..

I fK)6Tf n se, to adjust the loc us of a light beam emitted from the flashlight l O L the focusing ring 1 2 is reciprocally moved, without rotation, along the longitudinal direction of the body in th direction of the arrows. Because the light source support 12a is -directly coupled to the external focusing Hog 102, movement of the focusing ring 1.02 imparts direct corresponding overnent in the light source support 12a. This causes the light source I i a to move relative to the .tens 8a. Because the optical tens §a Is specifically configured to provided different light beam focusing sta es for different positions of the light source 1 I relative to the optical lens 8a, the reciprocal movement of the exte nal focusing rmg.1.02 causes different light beam focusing states (eg,, brighter narrow light beam focusing state with the light source 1 la at a mouth of iVustoconical hole 1 4 of lens 8a. a second broader light beam focusing state with the light source } ia. disposed further within frnstoconical hole 124). Thus, mo veme of the external focusing- ring 102 towards first end 7a ca ses a broader light beam and movement of the external focusing ring towards the second end 9a c uses a narrower, brighter light beam.

{00681 With reference ¾ FIGS. 9 and 10, a further embodiment of a focusing assembly 200 of a flashlight .201 will be described, Similar eiers vents to those shown and described above with respect to FIGS. !~6 will be shown and/or described with, like reference numbers, but with a "b" suSiis, and the subject matter described with respect to. the other figures I the present application is incorporated herein. Similar to the lens 8a, the optical tens 8h. is specifically configured to enable the proper light beam tor different focusing states of the focusing assembly 200,

[0069] Similar to the focusing assembly 100 of FIGS. 7 and 8, foe focusing assembly 200 Includes an external focusing ring 202 directl connected to a light soufce support or mounting assembly 204 through a mechanical coupler or connecbou rod 20b for reciprocal movement therewith relative to lens 8b and flashlight body 5b. [0070] The exte nal fo usin ring 202 circumfemsiiaOy surrounds a mounting assembly guide rail 20S and reciprocally and siidably moves in a longitudinal direction of the flashlight 201 in the direction of the arrows shown o move the light source support 204. The focusing ring 202 is substantially cylindrical and ma include one or more protruding segments 21 or other external features extending from an exterior or fbe skg ring 202. The focussing ring 202 includes m Inwardly extending top end 212 m an upper ring portion 214. The inwardly extending top end 212 Is rnovabiy disposed within an annular upper ring receiving section 16, which, is disposed within hollow interior 4b, md aliy outward from fens 8 b.

[0071 ] ^' The light source support/mounting assembly 204 acts as a vehicle to move the light -source (e.g., LED) 1 l a to different focusing positions and also set as heat sink, to keep excessive heat away ^' om the Iight source I l a. The light source support 12b has a cup-shaped configuration with an upper -portion 218 and an annular lower portion 220. The upper portion 2.18 includes one or more spaced annular, radially outward protruding cooling tins or ribs 222 (is this correct?) to draw, beat away from the light source t la . sod a circular recess that receives the light source (e.g., LED) 1 l b. The lower portion 220 of the light source support .12b houses one or more electrical connectors or other electronics for electrically coupling the light source 1 l b to battery 1 b via PCS board assembly 224 and a flexible connector (Is ibis shown?). The PCS board assembly 224 connects the light source l i b to the battery 10b as well as enabling various flashlight functions.

[0072] The mounting assembly guide rail 208 allows the light source support .204 to move reciprocally in the longitudinal direction of the flashlight -20.1 (without rotation of the light source support 204) in a stable ¾eciory and acts as framework to keep all pasts of the flashlight head together. The connection rod 206, which directly connects the external focusin -ring 202 to the light source support 204. reciprocally slides within a groove 26

100 /3] In the- mounting assembly guide .rail 208 to enable the light source support 204 to move with movement of the externa! focusing ring 202. The connection rod 206 spans the groove 226 between an inner wail of the focusing ring 202 and an outer surface of the mounting assembly guide mil 20S. Not only does the connection rod 20 ■connect the external focus ri g 202 with the light source support 204, but because it is thermally coupled to thermally conductive light source support 204, the connection rod 206 also transfers heat from, an inner part of the focusing assembly 2.00 to an outer part of the foc sing assembly 200 and outside the body 5b,

(0074) in use, to adjust the locus of a light beam emitted from the Flashlight 20 !, the focusing ring 202 is reciprocally moved, without rotation, along the longitudinal direction of the body in the direction of the arrows. Because the light source support 226 Is directly coupled to the external focusing ring 202, movement of the focusing ring 202 imparts direct, edrres.pond.mg movement in the light source support 226. This causes the light source M b to move relative to the lens 8b, Reciprocal movement of the externa! focusing ring 10,3 causes different light beam focusing states: a first brighter narrow light beam focusing state with the light source M b at a mouth of tfustoeonkal hole 230., and a second broader tight beam focusing state with the light source 1 l b disposed furthe within frustoconieal hole 230. Thus, movement of the external focusing ring 202 towards first end 7b causes a broader light -beam and movement of the external focusing ri ng towards the second end 9b causes a narrower, brighter light beam.

10075] With reference to FIGS. Π and 12, an embodiment of a twist push light focusing system 300 of a flashlight hea 302 of a flash light 304 including a body handle 306 that receives one or more batteries 307 will be described, 0076] The twist push light focusing system 300 includes a rotatable, annular, tubular lens support 350 with diagonal guide tracks 352. The lens support 350 is rotatahly disposed inside body mounting piece 320, The guide tracks 352 arc diagonal, recesses cut Into opposite sides of the lens support 350 in outer peripheral surface 354, i0077j The guide tracks 352 are disposed at an angle A relative to horizontal The angle A depends on focus lens 360 being used, ^' The angle A has to he at such degree that it allows the lens 360 to travel the required distance up and down to make use of the lens' optimum focus distance, If the angle A is steeper, focu ring 330 has to be pushed a lesser distance to achieve the required focus. Conversely, if the angle A Is flatter, focus ring 330 has to be pushed a greater distance to achieve the re uired

K ^' k'Ui.

[0078] Focusing ring or member 330, which moves forward and backward !n the longitudinal direction (see arrow In FIG, I I), includes Inwardly extending guiding pin 340 and focusing ring connection pin 370 that ride within the guide tracks 3S2 with forward and backward longitudinal movement of focus ring .330 to cause the lens support 350 to bot restate nd move slightly forward and backward in the longitudinal direction (see arrows in FIG. 12) to .move the relative positions of focus lens 360, which is mou ed on top of the lens support 350, and LED light source 380 with respect to each other lor adjusting the focus of the Sashiight 304, The light source 380 is coupled to the one or m re batteries 307 b one or more connectors 382.

[0079] The twist push light focusing system 300 Is sealed with, the head 302 and flat lens 390 onto _: the body mounting piece 320 _; providing a. virtually sealed compartment that gives the flashlight 304 a high level of water resistance.

|0080j With reference to FIG. 3.3, in an alternate embodiment, the guiding pins 340, 370 are outwardly extending guiding ins 340, 370 that extend outwardly from the support 350 and as? inner surface of the focusing ring 330 includes the guide tracks 352 that the guiding pin$ 340, 370 ride within to cause the support 350 to both rotate and mo e slightly forward and backward in the longitudinal di¾ciion. lOOS 11 i a further embedment, one of the guiding pins 340, 370 is an outwardly extending guiding pin 340, 370 that extends outward from the support 350 and an inner mtfsee of the focusing ring 330 Includes a guide track 352 that outwardl extending guiding pin 340, 37 rides within, and the other guiding pin 340, 370 is an Inwardly extending guiding pin 3411, 370 that ides within a single guide track 352 on the omer peripheral surface of the support 350 (similar to that shown and described with respect to FIGS. 1 1 , 12).

[00821 in a still further embodiment as shown In PIG. 1 , which may include inwardly exte ding guide pins 340. 370, otnwardly extending guide pins 340, 370, or both fnwardly/outtvardiy extending guide pl and 340, 370 corresponding guide traekCs) 352 on the surtace(s) of the focusing ring 330/support 3.50, instead of the support 350 ooopled to th tens 360 to ause the lens 360 to m ve relative to a stationary LEO light source 38 , the support 350 s coupled to the LED light source 380 via a l ht source su t 300 to cause the LED light source 38 to move relative a stationary tens 360, which Is fixed relative So She flashlight head 302.

10083) in all of the above embodiments, a rotationaLtodongkudma! movement translation mechanism operab!y couples Reusing .ring/member 330 with one of the light source 380 and die focus lens 360 to cause relative movement bet e the light source 380 and the focus lens 300 to achieve focus.

[0084] The above figures may depict cxempiajy configurations for the invention, which is done to aid -in .un erstanding the .features and .fundtionality that can be included in the invention. The invention is not restricted to the illustrated architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, although the invention is described ab ve in terms of various exemplary embodiments and implementations, it should be -understood that the various features and fttnctfcaiaJHy described In one or more of the individual embodiments with which they are described, but instead can be applied, alone or in some eonmlnatm to one or more of the other embodiments of the invention, whether or not such embodiments are described and whether or not. such features are presented as being a part of a described embodiment, ^' thus the breadth and scope of the present invention, especially in the following claims, should not be limited by any of the above-described exemplary embodiments.

[0085] Terms and phrases used in this document and variations thereof unless otherwise expressly stated, should be construed as open ended as opposed to limiting. As examples of the -foregoing: the term "including ^{' '} should be read as meaning ''including, without limitation" or the like; the term "example ^5" is used to provide exemplary instances of the item In discussion, not an exhaustive or limiting list thereof; and adjectives such as ^{^} 'conventional^ "traditional" "standard," '"known ^" and terms of similar meaning should not be construed as limiting the item described to a given time period or to aft item available as of a en time, hot instead should be read to encompass conventional tradi ionsL normal, or standard technologies that m y be available or known now or at any time in the e, Likewise, a group of Items linked with the conjunction "a d" should not be read as squirin that each and ever one of those items e present in the _. grouping, but rather should be read as "and/of ^" unless expressly stated otherwise. Similarly, a group of items linked with the c njunction, "of ^" should not be read as requiring mutual exclusivity among that group, but rather should lso be read as "and/or unless; expressly stated otherwise, furiber ore, although items, elements or components of the- disclosure may be described or claimed In the singular, the plural is contemplated to be within the scope thereof unless limitation to the singular is explicitly stated, l ite presence _: :of broadening words and phrases such as "o e or more," ^' "at iesstf ^" " ut not limited ¾.f or other like:

phrases in some instances shall not be read to mean thai the narrower case is intended, or required in instances where such broadening phrases may be absent-