FIELD

The present disclosure relates to lock assembly. More particularly to a door lock assembly mounted on a hinged door panel.

BACKGROUND

The background information herein below relates to the present disclosure but is not necessarily prior art.

Generally, a lock is a mechanical or an electronic device for selectively providing and restricting access to an enclosed property. More specifically, the lock is used to protect against forced and surreptitious entry to the enclosed property. A lock may be used on various structures such as a door, a vehicle, a container or the like. Locks have been used in doors to securely close the doors against unauthorized access and to prevent loss of possessions and valuables stored within. Door locks have become a necessity in modem world to protect the inhabitants and their possessions from potential intruders and at the same time provide easy and quick access to the inhabitants.

Doors are generally a single shutter with hinge at one side or sliding or double shutter. The hinge doors are locked with an Aldrop having a sliding bolt, fitted on an outside shutter surface, that would enter fixed rings provided on another shutter or door frame of double door or single respectively and a pad lock is used to lock the door. However, the locking rod and padlock of such type of Aldrop locking arrangement are fully exposed to outside. Thereby, an unauthorized person easily comes to know about the availability or the presence of any person inside the enclosed property.

Further, the Aldrop type locking arrangement is easily breakable by inserting jemmy in the shackle of the padlock or by inserting the jemmy between the locking rod and door surface and to thereby breaking the fragile ring brackets. Thereby, the Aldrop type locking arrangement is not safe and secure for the enclosed property.

Currently, various types of locking systems are being used for locking the doors without disposing the locking mechanisms outside the door surface. However, most people prefer Aldrop on door for visual security. A conventional locking system has a short length of the dead bolt. Therefore, when the door is locked, the dead bolt is supported firstly at a flange of receptacle and secondly by a flange of lockcase. However, when a force is applied by using jimmy, the dead bolt gets bend and the flange of receptacle and lock body gets broken.

Thus, there is felt a need for a door lock assembly that alleviates the aforementioned drawbacks.

OBJECTS

Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:

An object of the present invention is to provide a door lock assembly.

Another object of the present invention is to provide a door lock assembly which has robust housing.

Still another object of the present invention is to provide a door lock assembly which is not breakable and tamperable.

Yet another object of the present invention is to provide a door lock assembly that is easy to use and provide smooth locking and unlocking function.

Still another object of the present invention is to provide a door lock assembly that provides improved security.

Yet another object of the present invention is to provide a door lock assembly that is easy to use from outside as well as from inside of a door.

Still another object of the present invention is to provide a door lock assembly that is not fully exposed to outside.

Yet another object of the present invention is to provide a door lock assembly that avoids any use of electric components in the assembly.

Still another object of the present invention is to provide a door lock assembly with long dead bolts or locking means. Yet another object of the present invention is to provide a door lock assembly that is easy to manufacture and assembly.

Still another object of the present invention is to provide a door lock assembly with optimum weight and dimensions.

Yet another object of the present invention is to provide a door lock assembly that facilitates large number of different key combinations.

Still another object of the present invention is to provide a door lock assembly which can improve strength of a door panel.

Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.

SUMMARY

The present disclosure envisages a door lock assembly. The assembly is configured to be mounted on an operative surface of a door panel. The door panel has a first housing and a second housing. The second housing is operatively mounted opposite to the first housing on the door panel. The door lock assembly comprises a lock cylinder, at least one crank, a slider and at least one locking means.

The lock cylinder is configured within the first housing and further configured with an opening to receive an opening means therein. The at least one crank is configured to be mechanically engaged with an operative end of the lock cylinder. The slider is configured to be pivotally engaged with the at least one crank within the first housing. The at least one locking means is configured to be operatively mounted on a first flange portion of the slider. The locking means is further configured to be received within an aperture provided on a door frame in the locking position of the door lock assembly.

Further, the actuation of the lock cylinder is configured to linearly displace the locking means from the unlocked position to the locked position or vice-versa, so as to facilitate the locking or the unlocking of the door panel with the door frame.

Further, the crank includes at least one drive crank and at least one driven crank, operatively engaged with each other. The drive crank is defined by a disc-shape plate and an arcuate slot portion is configured thereon. The drive crank is configured to be lockingly received to an operative end of the lock cylinder. A plurality of engaging means is configured on the drive crank, to get lock with an operative end of the lock cylinder. Thereby, the drive crank is configured to angularly rotate with the actuation of the lock cylinder in an operative configuration.

The driven crank is configured with a first pivot pin and a second pivot pin. The first pivot pin is configured to be pivotally engaged and slide within the arcuate slot portion of the drive crank. A first operative portion of the second pivot pin is configured to be pivotally engaged with a driving groove configured on the slider. To thereby, the second pivot point linearly displaces the slider with an angular rotation of the driven crank.

In an embodiment, the assembly is configured with at least one first biasing member, configured to provide biasing force to the driven crank.

In another embodiment, at least one first biasing member, configured to bias the first operative portion of the second pivot pin within the driving groove.

Further, a first base plate is configured to be mounted on the first housing, and further configured with a second flange portion with at least one first hole thereon. The first base plate is configured with a first supporting bracket having at least a second hole thereon. The first housing is configured with at least a third hole, the first hole, the second hole and the third hole are configured to be co-axial.

In an embodiment, the at least one locking means is configured to slide on the first hole and the second hole.

In another embodiment, an operating surface of the first base plate is configured with at least one mounting rib to mount a second supporting bracket thereon.

In another embodiment, the second supporting bracket is configured with a slot to receive the lock cylinder thereon, and further configured to restrict the movement of the lock cylinder.

Further the assembly comprises a guide bush. The guide bush is defined by a tubular portion and a flange portion on an operative first end of the tubular portion and a receiving means on an operative second end of the bush. The guide bush is configured to be located between the drive crank and the driven crank. The tubular portion of the guide bush is configured to be received within a cutout configured on the driven crank. The flange portion of the guide bush is configured to be rigidly attached on the driven crank.

In an embodiment, the axis of the lock cylinder, the drive crank, the driven crank, and the guide bush, are co-axial to the notch strip guide.

In another embodiment, the flange portion of the guide bush is attached on the driven crank by means of a circlip.

In another embodiment, the first housing is configured to be secured on an operative outer surface of the door panel and the second housing is configured to be secured on an operative inner surface of the door panel, to thereby, the door lock assembly is able to be operated from inside as well as outside of a room.

Further, the second housing comprises a notch strip, and a knob. A front portion of the notch strip is configured to be received within the notch strip guide. The knob is configured to be received within the second housing. A cylindrical portion of the knob is configured to receive a rear portion of the notch strip. A spring arrangement is configured within the cylindrical portion of the knob to fix the operating length of the notch strip.

In an embodiment, the displacement of the knob is configured to lock or unlock the door lock assembly.

In another embodiment, the axis of the notch strip is co-axial with axis of the lock cylinder, the drive crank, the driven crank, and the guide bush.

In another embodiment, at least one second biasing member is configured within the second housing. The second biasing member is configured to provide the biasing force for retaining the knob.

In another embodiment, the first housing and the second housing are mounted by means of a plurality of fastening means selected from screws, and bolts.

In another embodiment, the first housing is configured with at least one flange portion circumferentially located along said first housing.

Advantageously, the first housing and the second housing provides a robust and non-fragile structure. Further, the locking means is completely received within the aperture of the door frame; therefore the locking means of the door lock assembly is not visible to the unauthorized persons.

Further, the present disclosure also envisages a door lock assembly with an offset actuating means. The door lock assembly is configured to be mounted on an operative surface of a door panel, having the first housing and the second housing operatively mounted opposite to the first housing on the door panel. The door lock assembly comprises a first actuating means configured with the lock cylinder within the first housing, a second actuating means configured with the second housing further configured to be offset with respect to the lock cylinder and at least one link arrangement within the second housing. The link arrangement further configured to operatively engage the lock cylinder and the second actuating means in an operative configuration. The actuation of either the lock cylinder or the second actuating means configured to linearly displace at least one locking means of the first housing (10) from an unlock position to a lock position or vice-versa, to facilitate locking or unlocking of the door panel with a door frame.

In an embodiment, an axis of the first actuating means and an axis of second actuating means are in a parallel plane.

Further, the first actuating means is configured with the at least one crank configured to be mechanically engaged with the lock cylinder, and the slider configured to be pivotally engaged with the crank configured within the first housing. The at least one locking means is configured to be mounted on a first flange portion of the slider. The actuation of the lock cylinder is configured to linearly displace the locking means from the unlock position to the lock position or vice-versa, to thereby facilitates the locking or unlocking of the door panel within the aperture of the door frame.

In an embodiment, the lock cylinder configured with an opening to receive an opening means therein. The opening means is configured to actuate the lock cylinder between a lock and an unlock position.

Further, the crank includes at least one drive crank, defined by a disc-shape plate and an arcuate slot portion is configured thereon, and at least one driven crank, configured with a first pivot pin and a second pivot pin. The drive crank is configured to be lockingly received to an operative end of the lock cylinder and the first pivot pin is configured to be pivotally engaged and slide within the arcuate slot portion of the drive crank. The operative portion of the second pivot pin is configured to engage with the driving groove configured on the slider, and further configured to linearly displace the slider with an angular rotation of the driven crank. The assembly comprises a guide bush, defined by the tubular portion and the flange portion.

In an embodiment, the axis of the lock cylinder, the drive crank, the driven crank, and the guide bush, are co-axial to the notch strip guide.

Further, the second housing comprises the notch strip, the knob and the link arrangement. The front portion of the notch strip is configured to be received within the notch strip guide. The knob is configured to be received within the second housing. The cylindrical portion of the knob is configured to engage with the link arrangement to operate the notch strip of the second housing in an operative configuration.

In an embodiment, the cylindrical portion of the knob is configured with a spring arrangement to fix the operating length of the notch strip.

In another embodiment, the displacement of the knob is configured to lock or unlock the door lock assembly.

Advantageously, the first housing and the second housing provides robust and non-fragile structure to the door lock assembly. Further, the locking means is completely received within the aperture of the door frame; therefore the locking means of the door lock assembly is not visible to the unauthorized persons.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING

A door lock assembly of the present disclosure will now be described with the help of the accompanying drawing, in which:

Figure 1 illustrates an existing Aldrop locking arrangement with locking rod and padlock;

Figure 2 illustrates conventional locking system, consisting of rim lock fitted on a door;

Figure 3A illustrates a front view of a first housing of the door lock assembly fitted on outside surface of inside opening door in accordance with the present disclosure; Figure 3B illustrates a top view of a first housing of the door lock assembly fitted on outside surface of inside opening door in accordance with the present disclosure;

Figure 3C illustrates a front view of a second housing of the door lock assembly fitted on inside of door in accordance with the present disclosure;

Figure 3D illustrates a front view of a first housing of the door lock assembly fitted on outside surface of outside opening door in accordance with the present disclosure;

Figure 3E illustrates a top view of a first housing of the door lock assembly fitted on outside surface of outside opening door in accordance with the present disclosure;

Figure 3F illustrates a front view of a striker of the door lock assembly fitted on outside of frame in accordance with the present disclosure;

Figure 3G illustrates a front view of a striker cover of the door lock assembly fitted on outside of frame in accordance with the present disclosure;

Figure 3H illustrates a side view of a striker cover of the door lock assembly fitted on outside of frame in accordance with the present disclosure;

Figure 4A illustrates an exploded view of the first housing of the door lock assembly in accordance with the present disclosure;

Figure 4B illustrates an exploded view of the second housing of the door lock assembly in accordance with the present disclosure;

Figure 5A illustrates a cross-sectional view of the door lock assembly of Figure 3A, along plane P-P of Figure 5B;

Figure 5B illustrates a front view of the first housing of the door lock assembly in a locked position;

Figure 6A illustrates a cross-sectional view of the door lock assembly of Figure 3A, along plane Q-Q of Figure 6B;

Figure 6B illustrates a front view of the first housing of the door lock assembly in an unlocked position; Figure 7 illustrates an inside view of the first housing having at least one dead bolt is in locked position and key in withdrawal position;

Figure 8 illustrates an inside view of the first housing having at least one dead bolt is in the mid position.

Figure 9 illustrates an inside view of the first housing having a dead bolts are in an unlocked position and key in inserted condition;

Figure 10 illustrates an inside view of the first housing having at least one dead bolt is in unlocked position and key in withdrawal position;

Figure 11 illustrates an inside view the first housing having at least one dead bolt is in locked position and key in inserted condition.

Figure 12A illustrates a front view of a first base plate with at least one rib assembly;

Figure 12B illustrates atop view of the first base plate assembly of figure 12A;

Figure 12C illustrates a side view of the first base plate with at least one rib assembly of figure 12A;

Figure 13A illustrates an inside view of the first housing of the door lock assembly in accordance with the present disclosure;

Figure 13B illustrates a side view of the first housing of the door lock assembly of figure 13A;

Figure 14A illustrates a front view of at least one dead bolt, mounted on a slider assembly;

Figure 14B illustrates a top view of at least one dead bolt mounted on a slider assembly of figure 14A;

Figure 15A illustrates a front view of driven crank assembly having a first pivot and a second pivot;

Figure 15B illustrates a side view of driven crank assembly of figure 15A with a first pivot and a second pivot; Figure 16 illustrates a front view of a drive crank with an engaging means;

Figure 17A illustrates a front view of guide bush with a flange portion and a tubular portion thereon;

Figure 17B illustrates a bottom view of guide bush with a flange portion of figure 17A;

Figure 18A illustrates a front view of an indexing bush;

Figure 18B illustrates atop view of indexing bush of figure 18A;

Figure 18C illustrates a bottom view of indexing bush of figure 18A;

Figure 19A illustrates a front view of support bracket for dead bolt;

Figure 19B illustrates atop view of support bracket for dead bolt of figure 19A;

Figure 20A illustrates a front view of striker;

Figure 20B illustrates a side view of striker of figure 20A;

Figure 21A illustrates a front view of striker cover;

Figure 21B illustrates a side view of striker cover of figure 21A;

Figure 22A illustrates a front view of a second housing of the door lock assembly;

Figure 22B illustrates a side view of a second housing of figure 22A;

Figure 23 illustrates a front view of a second base plate;

Figure 24A illustrates a front view of an assembly of the first housing with the second housing by means of plurality of fastening means (screws);

Figure 24B illustrates a top view of an assembly of the first housing with the second housing by means of plurality of fastening means (screws); and

LIST OF REFERENCE NUMERALS

10 - first housing

11 - Third Hole for dead bolt 12 - aperture for lock cylinder

13 - first housing flange portion

14 - first projection

15 - second projection

20 - first base plate

21 - first hole for dead bolt

22 - aperture for guide bush

23 - aperture for door lock fixing screws

24 - aperture for first base plate fixing screws

25 - rib

26 - bush

27 - slider

28 - first flange portion of slider

30 - dead bolt and slider assembly

31 - driving groove

32 - guide recess

33 - dead bolt

34 - projection for spring

35 - projection

40 - driven crank

41 - cutout 42 - stub

43 -second pivot pin

44a - first operative portion of second pivot

44b - second operative portion of second pivot

45 - first pivot pin

50 - guide bush

50a- flange portion

50b- tubular portion

51 - groove for circlip

52 - notch strip guide

53 - cam guide

60 - drive crank

61A, 61B - arcuate slot portion

62 - dimple

63 - engaging means

70 - lock cylinder

70a - opening

71 - second supporting bracket for lock cylinder

72 - indexing bush for lock cylinder

73 - aperture

74 - slot 75 - guide for indexing spring & ball

76 - indexing spring

77 - indexing ball

80 - first supporting bracket for dead bolt

80a- second flange portion for dead bolt

81 - second hole for dead bolt

90 - striker for inside opening door

91 - aperture for fixing screws

92 - aperture for dead bolt of striker

93 - striker cover for inside opening door

94 - aperture for fixing screws

95 - aperture for dead bolt striker cover

96 - striker for outside opening door

97 - aperture for dead bolt of striker

98 - striker cover for outside opening door

99 - aperture for dead bolt striker cover

100 - second housing

101 - aperture for knob

102 - aperture for lock/ unlock indicator

103 - aperture for fixing screws

104 - projection 110 - second base plate

112 - aperture for lock fixing screws

120 -knob

120a - cylindrical portion of knob

121 - spring of cylindrical portion

122 - notch strip

123 - notch strip locking pin

124 - guide bush

124a - flange portion

124b - tubular portion

125 - retainer washer

126 - indicator crank

1000 - door lock assembly

DETAILED DESCRIPTION

Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.

Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.

The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a”, “an”, and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “comprises”, “comprising”, “including”, and “having”, are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.

When an element is referred to as being “mounted on”, “engaged to”, “connected to”, or “coupled to” another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed elements.

Terms such as “inner”, “outer”, “beneath”, “below”, “lower”, “above”, “upper”, and the like, may be used in the present disclosure to describe relationships between different elements as depicted from the figures.

Typically, a door is generally a single shutter with hinge at one side or sliding or double shutter as shown in Figure 1. The Figure 1 illustrates an existing Aldrop locking arrangement with locking rod and padlock. The hinge door is locked with an Aldrop having a sliding bolt, fitted on an outside shutter surface, that would enter fixed rings provided on another shutter or door frame of double door or single respectively and a pad lock is used to lock the door. However, the locking rod and padlock of such type of the existing Aldrop locking arrangement is fully exposed to outside. Thereby, an unauthorized person easily comes to know about the availability or the presence of any person inside the enclosed property.

Further, this Aldrop type locking arrangement is easily breakable by inserting jemmy in the shackle of the padlock or by inserting the jemmy between the locking rod and door surface and to thereby breaking the fragile ring brackets. Thereby, the existing Aldrop type locking arrangement is not safe and secure for the enclosed property.

Currently, various types of locking systems are being used for locking the doors without disposing the locking mechanisms outside the door surface. However, most people prefer Aldrop on door for visual security. A conventional locking system is shown in Figure 2. The Figure 2 illustrates conventional locking system, which fits from inside of the door. In conventional locking system, a rim lock having a short length of a dead bolt is used. Therefore, when the door is locked, the dead bolt is supported firstly at a flange of receptacle and secondly by a flange of lockcase. However, when a force is applied by using jimmy, the dead bolt gets bent and the flanges of receptacle and lock body gets brake.

To overcome the aforementioned drawbacks, the present invention envisages a newly developed door lock assembly. The assembly is configured to be mounted on an operative surface of a door panel. The assembly 1000 is now being described with reference to Figure 3 to Figure 24.

A first embodiment of the present disclosure will now be described with reference to the Figure 3A-3C, Figure 4A and Figure 4B. The door panel has a first housing 10 and a second housing 100. The second housing 100 is operatively mounted opposite to the first housing 10 on the door panel. The door lock assembly 1000 comprises a lock cylinder 70, at least one crank, a slider 27 and at least one locking means.

The assembly 1000 is configured to be mounted on an operative surface of a door panel. The door panel has the first housing 10 and the second housing 100. The second housing 100 is operatively mounted opposite to the first housing 10 on the door panel. The first and second housing 10, 100 are mounted on the operative surface of the door panel facing the striker using a plurality of threaded fasteners from inside face and passing through the door panel. The first housing 10 is configured with an aperture for the lock cylinder 12, at least one flange portion on at least one side 13, a plurality of first projections 14 and a plurality of second projections 15. The flange portion 13, the first and the second projections 14, 15 supports and provide strengths to the first housing 10 of the door lock assembly 1000. The Figure 3A illustrates a front view of a first housing of the door lock assembly in accordance with the present disclosure; Figure 3B illustrates a top view of a first housing of the door lock assembly fitted on outside surface of inside opening door; the Figure 3C illustrates a front view of a second housing of the door lock assembly in accordance with the present disclosure; the Figure 4A illustrates an exploded view of the first housing of the door lock assembly in accordance with the present disclosure; and the Figure 4B illustrates an exploded view of the second housing of the door lock assembly in accordance with the present disclosure. In an embodiment, the flange portion 13 provided on the first housing avoids the tampering of the assembly and provides strength to the housing.

The lock cylinder 70 is configured within the first housing 10 and further configured with an opening 70a to receive an opening means therein. The lock cylinder 70 is being received by an indexing bush 72 to support and hold the lock cylinder 70 therein. The at least one crank is configured to be mechanically engaged with an operative end of the lock cylinder 70. The slider 27 is configured to be pivotally engaged with the at least one crank within the first housing 10. The slider 27 is provided with a guide recess 32 and a projection for biasing member (spring) 34. The at least one locking means is configured to be operatively mounted on a first flange portion 28 of the slider to form a locking means and slider assembly 30. The locking means is further configured to be received within an aperture provided on a door frame in the locking position of the door lock assembly. The opening means is configured to actuate the lock cylinder 70 between a lock and an unlock position.

In an embodiment, the opening 70a is a key-way configured in the lock cylinder 70.

In another embodiment, the opening means is a key, configured to be received within the opening 70a .i.e. the key-way.

In another embodiment, the locking means is a deadbolt 33, configured to receive with the aperture of the door frame.

Further, the actuation of the lock cylinder 70 is configured to linearly displace the locking means from the unlock position to the lock position or vice-versa, so as to facilitate the locking or the unlocking of the door panel with the door frame. Figure 5A illustrates a cross- sectional view of the door lock assembly of Figure 3A, along plane P-P of Figure 5B; Figure 5B illustrates a front view of the first housing of the door lock assembly in a locked position; the Figure 6A illustrates a cross-sectional view of the door lock assembly of Figure 3A, along plane Q-Q of Figure 6B; and the Figure 6B illustrates a front view of the first housing of the door lock assembly in an unlocked position.

In an embodiment, the actuation of the lock cylinder 70 facilitates the angular displacement of the lock cylinder 70 in clockwise and anti -clockwise direction to initiate locking and unlocking of the assembly, respectively. Figure 7 illustrates an inside view of the first housing having at least one dead bolt is in locked position and key in withdrawal position; Figure 8 illustrates an inside view of the first housing having at least one dead bolt is in the mid position; Figure 9 illustrates an inside view of the first housing having dead bolts in an unlocked position and key in inserted condition; Figure 10 illustrates an inside view of the first housing having at least one dead bolt is in unlocked position and key in withdrawal position; and Figure 11 illustrates an inside view the first housing having at least one dead bolt is in locked position and key in inserted condition.

Further, a first base plate 20 is configured to be mounted on the first housing 10, and further configured with a second flange portion 80a with at least one first hole 21 thereon. The base plate 20 is configured with an aperture for guide bush 22, a plurality of apertures for door lock fixing screws 23 and a plurality of apertures for first base plate fixing screws 24. The first base plate 20 is configured with a first supporting bracket 80 having at least a second hole 81 thereon. The first housing 10 is configured with at least a third hole 11, the first hole 21, the second hole 81 and the third hole 11 are configured to be co-axial. The locking means is configured to slide on the first hole 21 and the second hole 81. An operating surface of the first base plate 20 is configured with at least one mounting rib 25 to mount a second supporting bracket 71 thereon. The second supporting bracket 71 is configured with a slot 74 to receive the lock cylinder 70 thereon, and further configured to restrict the movement of the lock cylinder 70. Figure 12A illustrates a front view of a first base plate with at least one rib assembly; Figure 12B illustrates a top view of the first base plate assembly of figure 12A; Figure 12C illustrates a side view of the first base plate with at least one rib assembly of figure 12A; Figure 13A illustrates an inside view of the first housing of the door lock assembly in accordance with the present disclosure; and Figure 13B illustrates a side view of the first housing of the door lock assembly of figure 13A.

Further, the crank includes at least one drive crank 60 and at least one driven crank 40, operatively engaged with each other. The drive crank 60 is defined by a disc-shape plate and an arcuate slot portion 61 A, 6 IB is configured thereon. The drive crank 60 is configured to be lockingly received to an operative end of the lock cylinder 70. A plurality of engaging means 63 is configured on the drive crank 60, to get lock with an operative end of the lock cylinder 70. Thereby, the drive crank 60 is configured to angularly rotate with the actuation of the lock cylinder 70 in an operative configuration. The driven crank 40 is configured with a first pivot pin 45 and a second pivot pin 43. The first pivot pin 45 is configured to be pivotally engaged and slide within the arcuate slot portion 61 A, 6 IB of the drive crank 60. A first operative portion of the second pivot pin 43 is configured to be pivotally engaged with a driving groove 31 configured on the slider 27. To thereby, the second pivot pin 43 linearly displaces the slider 27 with an angular rotation of the driven crank 40. The assembly is configured with at least one first biasing member, configured to provide biasing force to the driven crank 40. At least one first biasing member, configured to bias the first operative portion of the second pivot pin within the driving groove 31. Figure 14A illustrates a front view of at least one dead bolt, mounted on a slider assembly; Figure 14B illustrates a top view of at least one dead bolt mounted on a slider assembly of figure 14A; Figure 15A illustrates a front view of driven crank assembly having a first pivot pin 45 and a second pivot pin 43; Figure 15B illustrates a side view of driven crank assembly of figure 15A with a first pivot pin 45 and a second pivot pin 43; and Figure 16 illustrates a front view of a drive crank 60 with an engaging means.

In an embodiment, the first biasing member is a spring configured to induce a spring compression force on the second pivot pin 43.

Further the assembly 1000 comprises a guide bush 50. The guide bush 50 is defined by a tubular portion 50b and a flange portion 50a on an operative first end of the tubular. The guide bush 50 is configured to be located between the drive crank 60 and the driven crank 40. The tubular portion 50b of the guide bush 50 is configured to be received within a cutout 41 configured on the driven crank 40. The flange portion 50a of the guide bush is configured to be rigidly attached on the driven crank 40. The axis of the lock cylinder 70, the drive crank 60, the driven crank 40, and the guide bush 50 are co-axial to a notch strip guide 52. The tubular portion 50b of the guide bush is also configured with a groove 51 for circlip to operatively mount a cam guide 53 therein. The cam guide 53 is configured with the notch strip guide 52 on an operative other end of the bush 50.

In an embodiment, the flange portion 50a of the guide bush is attached on the driven crank 40 by means of the circlip.

Figure 17A illustrates a front view of guide bush 50 with a flange portion and a tubular portion thereon; Figure 17B illustrates a bottom view of guide bush 50 with a flange portion of figure 17A; Figure 18A illustrates a front view of a indexing bush; Figure 18B illustrates a top view of indexing bush of figure 18A; Figure 18C illustrates a bottom view of indexing bush of figure 18A; Figure 19A illustrates a front view of support bracket for dead bolt; and Figure 19B illustrates atop view of support bracket for dead bolt of figure 19A.

Further, the first housing 10 is configured to be secured on an operative outer surface of the door panel and the second housing 100 is configured to be secured on an operative inner surface of the door panel. Thereby, the door lock assembly 1000 is able to be operated from inside as well as outside of a room. The second housing 100 comprises a notch strip 122, and a knob 120. The second housing 100 is configured with a plurality of apertures for fixing screws 103, and an aperture of the knob 101. A front portion of the notch strip 122 is configured to be received within the notch strip guide 52. The knob 120 is configured to be received within the second housing 100. A cylindrical portion of the knob 120a is configured to receive a rear portion of the notch strip 122. A spring arrangement is configured within the cylindrical portion of the knob 120a to fix the operating length of the notch strip. The axis of the notch strip is co-axial with axis of the lock cylinder 70, the drive crank 60, the driven crank 40, and the guide bush 50. The second base plate 110 is configured with a plurality of the apertures for lock fixing screws 112 for mounting with the first housing 10. Figure 20A illustrates a front view of striker; Figure 20B illustrates a side view of striker of figure 20A; Figure 21A illustrates a front view of striker cover; Figure 21B illustrates a side view of striker cover of figure 21A. The striker cover conceals the deadbolt in locked condition. Hence the unauthorized person is not able to make out whether the door is locked or unlocked. Hence, the unauthorized access for the door lock is prevented.

In an embodiment, the displacement of the knob 120 is configured to lock or unlock the door lock assembly.

In another embodiment, the second housing 100 is configured with an aperture 102 for lock and unlock indicator for the convenient of user.

In another embodiment, at least one second biasing member is configured within the second housing. The second biasing member is configured to provide the biasing force for the retaining of the knob.

Advantageously, the first housing 10 and the second housing 100 provides robust and non- fragile structure. Further, the locking means is completely received within the aperture of the door frame; therefore the locking means of the door lock assembly is not visible to the unauthorized persons.

Figure 22A illustrates a front view of a second housing of the door lock assembly; Figure 22B illustrates a side view of second housing of figure 22A; and Figure 23 illustrates a front view of a second base plate.

Further, the present disclosure also envisages a door lock assembly 1000 with an offset actuating means. The door lock assembly 1000 is configured to be mounted on an operative surface of a door panel, having the first housing 10 and the second housing 100 operatively mounted opposite to the first housing 10 on the door panel. The door lock assembly comprises a first actuating means configured with the lock cylinder 70 within the first housing 10, a second actuating means configured with the second housing 100 further configured to be offset with respect to the lock cylinder 70 and at least one link arrangement within the second housing 100. The link arrangement further configured to operatively engage the lock cylinder 70 and the second actuating means in an operative configuration. The actuation of either the lock cylinder 70 or the second actuating means configured to linearly displace at least one locking means of the first housing 10 from an unlock position to a lock position or vice-versa, to facilitate locking or unlocking of the door panel with a door frame.

In an embodiment, an axis of the first actuating means and an axis of second actuating means are in a parallel plane.

Further, the first actuating means is configured with the at least one crank configured to be mechanically engaged with the lock cylinder 70, and the slider 27 configured to be pivotally engaged with the crank configured within the first housing 10. The at least one locking means is configured to be mounted on the first flange portion of the slider. The actuation of the lock cylinder is configured to linearly displace the locking means from the unlock position to the lock position or vice-versa, to thereby facilitates the locking or unlocking of the door panel within the aperture of the door frame.

In an embodiment, the lock cylinder is configured with an opening to receive an opening means therein. The opening means is configured to actuate the lock cylinder between a lock and an unlock position. Further, the crank includes at least one drive crank 60, defined by a disc-shape plate and an arcuate slot portion 61 A, 6 IB is configured thereon, and at least one driven crank 40, configured with a first pivot pin 45 and a second pivot pin 43. The drive crank 60 is configured to be lockingly received to an operative end of the lock cylinder 70 and the first pivot pin 45 is configured to be pivotally engaged and slide within the arcuate slot portion 61 A, 6 IB of the drive crank 60. The operative portion of the second pivot pin is configured to engage with the driving groove 31 configured on the slider, and further configured to linearly displace the slider with an angular rotation of the driven crank. The assembly comprises a guide bush 50, defined by the tubular portion 50b and the flange portion 50a.

In an embodiment, the axis of the lock cylinder 70, the drive crank 60, the driven crank 40, and the guide bush 50, are co-axial to the notch strip guide 52.

Further, the second housing comprises the notch strip, the knob and the link arrangement. The front portion of the notch strip is configured to be received within the notch strip guide 52. The knob is configured to be received within the second housing 100. The cylindrical portion of the knob 120a is configured to engage with the link arrangement to operate the notch strip of the second housing 100 in an operative configuration.

In an embodiment, the cylindrical portion of the knob 120a is configured with a spring arrangement to fix the operating length of the notch strip.

In another embodiment, the displacement of the knob 120 is configured to lock or unlock the door lock assembly.

Figure No. 3D & 3E illustrates the mounting of lock on outside of outside opening wooden or steel door. This type of door is fitted to provide additional security to the house and prevent the unauthorized person from entry.

The striker 96 is provided with a striker cover 98 which covers the deadbolts 33 while the door is in locked condition. Hence these deadbolts are not visible from outside when the door is in locked condition. Therefore, it is difficult for the unauthorized person to recognize or identify that whether the door is locked or unlocked. Thus, it avoids breaking of the locking arrangement.

In an embodiment, in case if the door is opening from inside, the striker 96 is provided with a striker cover 98, which is configured to covers the two deadbolts when the door is in locked position. Thus, these deadbolts cannot be visible from the outside of the door. Therefore, the unauthorized person cannot make out or identify whether the door is in locked position or unlocked position. Thus, it avoids breaking of the locking arrangement. As a result, the unauthorized individual is prevented from attempting to unlock the door lock assembly or breaking of the door lock assembly and enters the building or premises.

Figure 3E illustrates a top view of a first housing of the door lock assembly fitted on outside surface of outside opening door in accordance with the present disclosure; Figure 3F illustrates a front view of a striker of the door lock assembly fitted on outside of frame in accordance with the present disclosure; Figure 3G illustrates a front view of a striker cover of the door lock assembly fitted on outside of frame in accordance with the present disclosure; Figure 3H illustrates a side view of a striker cover of the door lock assembly fitted on outside of frame in accordance with the present disclosure.

Advantageously, the first housing and the second housing provides robust and non-fragile structure. Further, the locking means is completely received within the aperture of the door frame; therefore the locking means of the door lock assembly is not visible to the unauthorized persons.

The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.

TECHNICAL ADVANCES AND ECONOMICAL SIGNIFICANCE

The present disclosure described herein above has several technical advantages including, but not limited to, the realization of a door lock assembly, that:

• provides robust housing; provides a highly reliable locking mechanism; provides smooth locking and unlocking function; provides improved security;

• is easy to use from outside as well as from inside of a door;

• does not allow any unauthorised person to identify whether the door lock is in locked position or in unlocked position;

• provides strength to the lock assembly due to the presence of flange portion on the housing;

• avoids any use of electric components in the assembly;

• provides long dead bolts (or locking means);

• is easy to be manufactured and assembled at a low cost;

• has optimum weight and dimensions;

• provides strength to the door panel as the two housings hold the door rigidly by means of fastening means;

• facilitates large number of different key combinations; and

• is difficult to tamper and break.

The foregoing description of the specific embodiments so fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.

The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.

Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.

While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.