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Title:
A HAND TOOL FOR APPLYING ENHANCED FORCES
Document Type and Number:
WIPO Patent Application WO/2002/058892
Kind Code:
A1
Abstract:
A hand tool for applying enhanced forces comprises a base, a first and a second acting member and a driving member for forcing the first and the second acting member moving toward each other. The first and the second acting members may include cutting blades for cutting articles or gripping jaws for gripping or deforming articles. The hand tool of the present invention has a compact structure convenient for carrying, and is capable of providing enhanced force for performing gripping or cutting functions. The hand tool of the present invention may also be suitable for incorporating into multifunction pocket tools or tool kits, such as a Swiss Army Knife.

Inventors:
DONG SHUXIAN (SG)
Application Number:
PCT/SG2002/000007
Publication Date:
August 01, 2002
Filing Date:
January 19, 2002
Export Citation:
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Assignee:
DONG SHUXIAN (SG)
International Classes:
A45D29/02; (IPC1-7): B25F1/04
Foreign References:
US2699698A1955-01-18
US5557849A1996-09-24
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Claims:
CLAIMS
1. A hand tool for applying enhanced forces, the hand tool comprising : an elongated base having a longitudinal axis; an acting assembly having a first acting member and a second acting member; and a driving assembly operable for forcing the second acting member movable towards the first acting member along a direction substantially parallel to the longitudinal axis.
2. The hand tool as recited in claim 1, wherein the driving assembly further comprising: a first shaft; and a second shaft, wherein the first shaft and the second shaft being undeformable, the first shaft having a leading end connected to the second acting member; the second shaft having a trailing end connected to the base, and wherein the first shaft and the second shaft being pivotally connected together for varying the distance between the leading end and the trailing end.
3. The hand tool as recited in claim 2, wherein the driving assembly further comprising a handle extending from the second shaft and a recess formed on the first shaft for receiving the handle.
4. The hand tool as recited in claim 3, further comprising a resilient member for biasing the handle away from the recess.
5. The hand tool as recited in claim 4, wherein the resilient member being located between the handle and the recess.
6. The hand tool as recited in claim 1, wherein the base further comprising a stopper for restricting the movement of the first and second blades within a predetermined range.
7. The hand tool as recited in claim 2, further comprising a holder movably connected to the base, the holder having a closure for at least partially receiving the base, the holder further having a locking member for releaseably locking the base within the closure and biasing the second shaft when the base being out of the closure.
8. The hand tool as recited in claim 1, wherein the first acting member further comprising a first cutting blade and the second acting member further comprising a second cutting blade.
9. The hand tool as recited in claim 8, wherein the first and the second cutting blades being in crescent shape for cutting nails.
10. The hand tool as recited in claim 8, wherein the first and the second cutting blades being progressively closable towards each other.
11. The hand tool as recited in claim 1, wherein the first acting member further comprising a first gripping jaw and the second acting member further comprising a second gripping jaw.
12. The hand tool as recited in claim 1, wherein the driving assembly further comprising a lever pivotally connected to the base, the lever having a cam contacted to the first acting member for forcing the first acting member movable towards the second acting member.
13. A hand tool comprising: an elongated base having a first acting member and a longitudinal axis; a second acting member connected to the base and movable relative to the first acting member along a direction substantially parallel to the longitudinal axis; and a driving assembly having a first end; a first section adjacent to the first end; a second end and a second section adjacent to the second end, wherein the first end being connected to the second blade and the second end being connected to the base; and wherein the first section and the second section being pivotally connected together for varying the distance between the first end and the second end whereby forcing the second blade movable towards the first blade for applying an enhanced force therebetween.
14. The hand tool as recited in claim 13, further comprising a resilient means for biasing the first and the second acting members away from each other.
15. The hand tool as recited in claim 13, wherein the first acting member further comprising a first cutting blade and the second acting member further comprising a second cutting blade.
16. The hand tool as recited in claim 13, wherein the first acting member further comprising a first gripping jaw and the second acting member further comprising a second gripping jaw.
17. The hand tool as recited in claim 16, wherein the first gripping jaw further comprising a first torque, and the second gripping jaw further comprising a second torque.
18. A multifunction pocket tool kit comprising a hand tool as recited in any one of the preceding claims.
Description:
A HAND TOOL FOR APPLYING ENHANCED FORCES FIELD OF THE INVENTION The present invention relates to a hand tool. In particular, it relates to a pocket hand tool for applying enhanced forces.

BACKGROUND OF THE INVENTION Hand tools are used in industries and daily life for applying enhanced forces such as performing gripping, cutting, twisting or holding functions, which may be beyond the ability of a bare-hand operation. One type of a gripping or cutting hand tool such as a pliers comprises a pair of jaws and a pair of handles pivotally connected together for forcing the pair of jaws moving toward each other for gripping or cutting articles. While this type of hand tools may be able to provide desired gripping or cutting force, it is bulky in certain circumstances and is particularly inconvenient for carrying within a user's pocket, such as during traveling or camping activities.

Miniature pliers have been developed to meet the need for easy carrying such as for incorporating into multi-purpose pocket tools or tool kits. One disadvantage of this type of pliers is, due to its pocket-sized configuration and its way of operation, it may be difficult to provide desired force for performing gripping or cutting operations, such as installing a terminator to an electrical cable, cutting a metal wire or even clipping nails.

Nail clippers is another type of hand tool for providing cutting functions, i. e. for cutting nails of human beings. In certain circumstances, nail clippers may also be used to perform a general cutting function for cutting small sized items such as wires or even electrical cables.

Nail clippers presently in use comprises a pair of arms joint at one end and having a pair of blades each at another end of the arms. The pair of blades are closable by a operation handle connected proximate said another end through a connection pin. A protuberance is formed on the handle adjacent to the connection pin. When the handle is pressed toward the joint end of the pair of blades, the protuberance urges against one of the pair of arms therefore press the pair of arms carrying the pair of blades moving toward each other to cut the nail.

While this type of nail clippers are suitable for effectively cutting nails, it remains inconvenient for a user to carry along with, as it is still bulky because of the desired length of the connection pin movably connecting the pair of arms and the handle. In addition, the two blades are in the open position when the nail clipper is unused, therefore may potentially damage a user's pocket during carrying.

SUMMARY OF THE INVENTION It is a first aspect of the present invention that the hand tool disclosed is compact in structure for conveniently carrying along with a user or for incorporating into foldable multi-function pocket tools or pocket tool kits.

It is a second aspect of the present invention that the hand tool disclosed is capable of providing enhanced forces for performing gripping or cutting operations.

According to the first and second aspects of the present invention, there is disclosed a hand tool for applying enhanced forces, the hand tool comprises an elongated base having a longitudinal axis; an acting assembly having a first acting member and a second acting member; and a driving assembly operable for forcing the first and the second acting members movable towards each other along a direction substantially parallel to the longitudinal axis.

According to the first and second aspects of the present invention, there is disclosed a hand tool for applying enhanced forces, the hand tool comprises an elongated base having a first acting member and a longitudinal axis; a second acting member connected to the base and movable relative to the first acting member along a direction substantially parallel to the longitudinal axis; and a driving assembly having a first end; a first section adjacent to the first end; a second end and a second section adjacent to the second end, wherein the first end being connected to the second blade and the second end being connected to the base; and wherein the first section and the second section being pivotally connected together for varying the distance between the first end and the second end whereby forcing the second blade movable towards the first blade for applying an enhanced force therebetween.

Preferably, the driving assembly of the hand tool further comprises a first shaft and a second shaft; the first shaft having a leading end connected to the second acting member; and the second shaft having a trailing end connected to the base, wherein the first shaft and the second shaft being pivotally connected together for varying the distance between the leading end and the trailing end.

Preferably, the driving assembly of the hand tool further comprises a handle extending from the second shaft and a recess formed on the first shaft for receiving the handle.

Preferably, the driving assembly further comprises a resilient member for biasing the handle away from the recess.

Alternatively, the first acting member further comprises a first cutting blade, and the second acting member further comprises a second cutting blade. In one embodiment, the first and the second cutting blades are in crescent shape adapted for receiving nails for cutting.

Alternatively, the first acting member further comprises a first gripping jaw, and the second acting member further comprises a second gripping jaw.

A hand tool according to the present invention has a compact structure convenient for carrying, and is capable of providing enhanced force for performing gripping or cutting functions. The hand tool of the present invention may also be suitable for incorporating into multifunction pocket tools or tool kits, such as a Swiss Army Knife.

BRIEF DESCRIPTION OF DRAWINGS Figure 1 is a perspective view showing the open position of the hand tool according to a first embodiment of the present invention; Figure 2 is an enlarged view showing the cutting blades of Figure 1; Figure 3 is an enlarged view showing the handle of the hand tool of Figure 1; Figure 4 is a perspective view showing the close position of the hand tool of Figure 1; Figure 5 is a perspective view showing the open position of the hand tool according to a second embodiment of the present invention; Figure 6 is a perspective view showing the close position of the hand tool of Figure 5; Figure 7 a perspective view showing the open position of the hand tool according to a third embodiment of the present invention;

Figure 8 is a perspective view showing the close position of the hand tool of Figure 7; Figure 9 and Figure 10 are partial cross sectional views showing the hand tool of Figure 7 when installing a cable terminator onto a cable ; Figure 11 is a perspective view showing the open position of the hand tool according to the present invention being incorporated into a casing; and Figure 12 is a perspective view showing the close position of the hand tool according to the present invention being incorporated into a casing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to Figure 1 to Figure 3, a first embodiment of the hand tool of the present invention comprises an elongated base 100 which has a longitudinal axis 102, a first acting member 110, a second acting member 120, and a driving assembly including a first shaft 130 and a second shaft 140. The first acting member 110 includes a first cutting blade 112, the second acting member 120 includes a second cutting blade 122. The first acting member 120 is fixed on the base 100, the second acting member 120 is slidably connected to the base 100, and is movable long a direction substantially parallel to the longitudinal axis 102 of the base 100.

The first shaft 130 comprises a leading end 132 pivotally connected to the second acting member 120. The second shaft 140 comprises a trailing end 144 pivotally connected to the base 100. The first shaft 130 and second shaft 140 are pivotally connected to each other through a hinge 150. A handle 146 is formed extending from the second shaft 140, and a recess 136 is formed on the first shaft 130 for receiving the handle 146. A spring 160 is located within the recess 136 and biasing against the handle 146. With the biasing force of the spring 160, the handle 146 is forced away from the recess 136, therefore causing the second

shaft 140 rotating away from the base 100, and pulling the second acting member 120 away from the first acting member 110 thereby forming a gap 170 for receiving an article such as a nail or a wire for cutting. A stopper 104 is formed on the base 100 for limiting the movement of the second shaft 140 within a predetermined range. In this embodiment, the effective lengths of the base 100, the first shaft 130, the second shaft 140 are 100 mm, 45 mm and 45 mm, respectively, and the movement range of the second shaft 140 (i. e. the range of the gap 170) is 0-2 mm.

When the article to be cut (not shown) is placed within the gap 170, the handle 146 may be pressed towards the base 100. The spring 160 is therefore counter-biased and the second acting member 120 is pushed towards the first acting member 110. The gap 170 is narrowed and eventually closed by the first and second cutting blades 112 and 122, as shown in Figure 4. The article within the gap 170 can therefore be cut accordingly.

It can be seen that according to the first embodiment, the hand tool may work as a cutter or a nail clipper.

A second embodiment of the present invention is shown in Figure 5, wherein the first and second acting members 210,220 further includes a first and a second gripping jaws 212,222, respectively, and the first and the second gripping jaws 212,222 are closable by pressing the handle 246. An article desired to grip (not shown) may be placed between the first and the second gripping jaws 212, 222, in the open position, and the user may process the handle 246 towards the base 200. The first and the second gripping jaws 212,222 can then be pushed towards, and eventually closed to each other as shown in Figure 6, and tightly grip the article therewithin..

A third embodiment of the present invention is shown in Figure 7 to Figure 10. The hand tool includes two acting members 310 and 320 which having each a gripping jaw 312,322, respectively. The two gripping jaws 312,322 are now in a

special structure having each a torque 312a and 322a. A cable terminator 10 with an electrical cable 20 inserted into the hollow receiving portion 12 may be placed between the two gripping jaws 312,322, when in the open position shown in Figure 9. The two gripping jaws 312,322 can then be pushed toward each other.

The two torques 312a (not shown) and 322a close together to the close position as shown in Figure 10, and depress the hollow receiving portion 12 of the cable terminator 10, and eventually fix with the terminator 10 onto the cable 20.

References are now made to Figures 11 and 12, the hand tool of the present invention may be incorporated into a casing so that it can work as a foldable pocket tool. The hand tool body 400 is pivotally connected to the casing 500 through a hinge 600. When it is desired for use, the tool body 400 can be rotated out of the casing 500 so that the function of the hand tool can be performed. When the hand tool is not in use, the tool body 400 may be folded into the casing 500 for convenient carrying, as shown in Figure 12.

The above embodiments are exemplary examples of the present invention.

A skilled person would appreciate from the disclosures to derive other alternatives as workable pocket hand tools with various dimensions and for applying enhanced forces. For example, the cutting blades may be a crescent shape to correspond to the nails of human beings and the hand tool can now work as a nail clipper.




 
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