A lock assembly for rolling shutter

Abstract

The lock assembly (1000) comprises a lock case (10) and a cover plate (20). The lock case (10) has a first connector (15), a second connector (16), and an opening (11) configured on a side wall. A first bracket (40) having a stub (44) is pivotably mounted in the lock case (10). A second bracket (70) is pivotably mounted on the first bracket (40), and is configured to abut the first connector (15) in a locked configuration of the lock assembly (1000). A slider (30), having a dead bolt (31) attached thereto, is mounted on the second bracket (70) and is linearly displaced along the second connector (16). A lock cylinder (80), attached to a lock case (10), receives a key (100) therein to enable locking and unlocking of the lock assembly (1000) with the help of a driving crank (60) attached to the lock cylinder (80).

Description

[0001] A LOCK ASSEMBLY FOR ROLLING SHUTTER

[0002] FIELD

[0003] The present disclosure relates to a lock assembly. More particularly, this invention relates to a lock assembly of a rolling shutter.

[0004] BACKGROUND

[0005] The background information herein below relates to the present disclosure.

[0006] Like any other doors, vehicles, containers, or the likes, a rolling shutter is also provided with a lock to protect a shop or a warehouse enclosed by the rolling shutter from a forced or surreptitious entry.

[0007] There are different types of shutter locks typically available in market. The rolling shutters are locked in an eyelet having a sliding movement, fitted on shutter panel surface, that would enter a slot provided on rolling shutter guide and pad lock is used to lock the shutter through the eyelets from both the ends of rolling shutter.

[0008] However, no matter how strong the conventional locks are, burglary and theft issues are still commonly faced by the owners of shops and warehouses. More specifically, the eyelet type locking arrangement is easily breakable by inserting jemmy in the shackle of the padlock or by inserting the jemmy between the eyelets. Also, the eyelet type locking arrangement is easily cut by cutters. Thereby, the existing eyelets type locking arrangement is not safe and secure for the rolling shutters.

[0009] Thus, there is a need for a shutter lock assembly that alleviates the aforementioned drawbacks.

[0010] OBJECTS

[0011] Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:

[0012] An object of the present invention is to provide a lock assembly for rolling shutter.

[0013] Another object of the present invention is to provide a lock assembly which has robust lock case. Still another object of the present invention is to provide a lock assembly which is not breakable and cannot be tampered with.

[0014] Still another object of the present invention is to provide a lock assembly that is easy to manufacture and assemble.

[0015] Yet another object of the present invention is to provide a lock assembly that is easy to use and provide smooth locking and unlocking function.

[0016] Still another object of the present invention is to provide a lock assembly that provides improved security.

[0017] Still another object of the present invention is to provide a lock assembly that is not fully exposed to outside.

[0018] Another object of the present invention is to provide a lock assembly with minimum weight and dimensions.

[0019] Still another object of the present invention is to provide a rolling shutter lock assembly with long dead bolt or locking means.

[0020] 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.

[0021] SUMMARY

[0022] The present disclosure envisages a lock assembly for a rolling shutter which is accompanied with an opening configured on a frame supporting the rolling shutter. The lock assembly comprises a lock case defined by a base and side walls extending from the base in a substantially perpendicular direction. The base has an arcuate groove configured on an operative inner surface thereof. A first connector is configured to extend from the operative inner surface adjacent to the groove, and a second connector is configured to extend from the operative inner surface at a spaced apart distance from the first pillar. A first sidewall has an opening configured thereon. The lock assembly further comprises a first bracket, a second bracket, a slider, a dead bolt, a cover plate for the lock case, a lock cylinder and a driving crank. The first bracket is configured to be pivotably received in the groove. The first bracket has a stub extending therefrom. The second bracket is pivotably mounted on the first bracket. The second bracket is configured to abut the first connector in a locked configuration of the lock assembly. The slider is mounted on the second bracket. The slider has a slit configured thereon for receiving the second connector therein to enable linear displacement of the slider along the length of the slit. The dead bolt is attached to the slider. The dead bolt is configured to be received in the lock case in an unlocked configuration of the lock assembly, and is further configured to extend from the opening of the lock case in the locked configuration of the lock assembly.

[0023] The lock cylinder is attached to the lock case. The lock cylinder has an opening configured to extend from an operative outer surface of the cover plate to receive a key therein to enable locking and unlocking of the lock assembly. The driving crank is configured to be attached to an operative free end of the lock cylinder. The driving crank has a lip extending therefrom. The lip has a pair of side edges configured to abut the stub of the first bracket.

[0024] To facilitate locking of the lock assembly, the key is rotated in a first angular direction to allow rotation of the lock cylinder there along to enable abutment of a first operative edge of the driving crank with the stub to angularly displace the first bracket and the second bracket in the first direction to lockably abut the second bracket against the first connector, and enable linear displacement of the slider, and therefore the dead bolt in a first linear direction, out of the lock case into the strike plate.

[0025] To facilitate unlocking of the lock assembly, the key is rotated in a second angular direction to allow rotation of the lock cylinder there along to enable abutment of a second operative edge of the driving crank with the stub to angularly displace the first bracket and the second bracket in the second direction and release the second bracket from the first connector, and enable linear displacement of the slider, and therefore the dead bolt in a second linear direction, out of the strike plate into the lock case.

[0026] BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING

[0027] A rolling shutter lock assembly of the present disclosure will now be described with the help of the accompanying drawing, in which:

[0028] Figure 1A illustrates a front view of the rolling shutter locking arrangement with eyelet and padlock of the prior art; Figure IB illustrates a top view of the rolling shutter locking arrangement of Figure 1A;

[0029] Figure 2A illustrates a front view of the lock assembly of the present disclosure;

[0030] Figure 2B illustrates a top view of the lock assembly of the Figure 2A;

[0031] Figure 2C illustrates a back view of the lock assembly of the Figure 2A;

[0032] Figure 3 illustrates an exploded view of the lock assembly in accordance with the present disclosure;

[0033] Figure 4A illustrates a front view of the lock assembly in a locked condition, wherein the dead bolt is fully extended;

[0034] Figure 4B illustrates a cross-sectional view of the lock assembly along plane P-P of Figure 4A;

[0035] Figure 5A illustrates a front view of the lock assembly in an unlocked condition, wherein the dead bolt is fully retracted;

[0036] Figure SB illustrates a cross-sectional view of the lock assembly along plane Q-Q of Figure SA;

[0037] Figure 6 illustrates an inside view of the lock assembly having dead bolt is in locked position and key in withdrawal position;

[0038] Figure 7 illustrates an inside view of the lock assembly having dead bolt is in mid-position of the locked position and key in inserted position;

[0039] Figure 8 illustrates an inside view of the lock assembly having dead bolt is in unlocked position and key in withdrawal position;

[0040] Figure 9A illustrates an inside front view of the lock case in accordance with the present disclosure;

[0041] Figure 9B illustrates a side view of the lock case of Figure 9A;

[0042] Figure 10A illustrates a front view of the cover plate; Figure 10B illustrates a cross sectional view of the cover plate along plane P-P of Figure 10A;

[0043] Figure 11A illustrates a front view of dead bolt, a strengthening plate mounted on a slider assembly;

[0044] Figure 11B illustrates a bottom view of dead bolt, a strengthening plate mounted on a slider assembly of Figure 11A;

[0045] Figure 11C illustrates a side view of dead bolt, a strengthening plate mounted on a slider assembly of Figure 11A;

[0046] Figure 12A illustrates a front view of the first bracket assembly;

[0047] Figure 12B illustrates a top view of the first bracket assembly of Figure 12A;

[0048] Figure 13A illustrates a front view of the cylinder guide bush;

[0049] Figure 13B illustrates a cross-sectional view of the cylinder guide bush along plane P-P of

[0050] Figure 13A;

[0051] Figure 14A illustrates a front view of the driving crank;

[0052] Figure 14B illustrates a top view of the driving crank of Figure 14A;

[0053] Figure ISA illustrates a front view of the second bracket assembly;

[0054] Figure 15B illustrates a top view of the second bracket assembly of Figure ISA;

[0055] Figure 16A illustrates a front view of the support plate for cylinder;

[0056] Figure 16B illustrates a top view of the support plate for cylinder of Figure 16A;

[0057] Figure 17A illustrates a front view of the front plate assembly;

[0058] Figure 17B illustrates a top view of the front plate assembly of Figure 17A;

[0059] Figure 18A illustrates a front view of the lock assembly as seen from outside of shutter with the front plate fixed by means of plurality of fastening means (screws) with lock case; Figure 18B illustrates a top view of the lock assembly as seen from outside of shutter with the front plate fixed by means of plurality of fastening means (screws) with lock case;

[0060] Figure 18C illustrates a front view of the lock assembly as seen from inside of shutter with the front plate fixed by means of plurality of fastening means (screws) with lock case;

[0061] LIST OF REFERENCE NUMERALS

[0062] 10 - Lock case

[0063] 11 - opening Bolton lock case

[0064] 12 - aperture for cylinder bush guide

[0065] 13 - projection for lock fixing screw

[0066] 14 - projection for cover plate fitment

[0067] 15 - first connector

[0068] 16 - second connector

[0069] 17 - projection for ensuring cylinder plate fitment

[0070] 20 - cover plate

[0071] 21 - form for seating screw head

[0072] 22 - first slot for cylinder

[0073] 23 - second slot for lock fixing screw

[0074] 24 - third slot for cover plate fixing screw

[0075] 25 - aperture for second bracket load support projection

[0076] 30 - slider

[0077] 30A - leg

[0078] 31 - dead bolt 31 A - strengthening plate

[0079] 32 - locking pins for facilitating attachment of the dead bolt and the strengthening plate with the slider

[0080] 32A - locking pins for facilitating attachment of the strengthening plate with the slider

[0081] 33 - third hole for second bracket projection guide

[0082] 34 - slit

[0083] 35 - bush

[0084] 36 - first flange portion of slider

[0085] 37 - projection for spring

[0086] 38 - projection for spring

[0087] 39 - indexing spring

[0088] 40 - first bracket

[0089] 40A - first arm

[0090] 40B - second arm

[0091] 41 - first hole

[0092] 42 - first dowel

[0093] 43 - groove for circlip

[0094] 44 - stub

[0095] 50 - cylinder bush

[0096] 51 - tubular portion of cylinder bush

[0097] 52 - flange portion of cylinder bush

[0098] 60 - driving crank 61 - lip

[0099] 61A, 61B - side edge

[0100] 62 - engaging means

[0101] 70 - second bracket

[0102] 71 - second hole

[0103] 72 - second dowel

[0104] 72 A - groove for circlip

[0105] 73 - tongue

[0106] 74 - neck

[0107] 80 - lock cylinder

[0108] 80a - opening

[0109] 90 - cylinder support plate

[0110] 91 - aperture for support plate fixing screws

[0111] 92 - aperture for cylinder guide

[0112] 100 - key

[0113] 110 - front plate

[0114] 111 - aperture for key entry

[0115] 112 - aperture for front plate fixing screws

[0116] 113 - dust cover assembly

[0117] 1000 - lock assembly

[0118] A - rolling shutter B - rolling shutter guide

[0119] C - sliding eyelet

[0120] D - fixed eyelet

[0121] DETAILED DESCRIPTION

[0122] Embodiments of the present disclosure, will now be described with reference to the accompanying drawing.

[0123] 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.

[0124] 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, elements, modules, units and / or components, but do not forbid the presence or addition of one or more other features, 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 constructed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.

[0125] 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.

[0126] The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.

[0127] 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.

[0128] Referring to Figure 1A and Figure IB an existing shutter lock assembly will now be described. Figure 1A illustrates a front view of existing rolling shutter locking arrangement with eyelet and padlock. Figure IB illustrates a top view of existing rolling shutter locking arrangement with eyelet and padlock. The rolling shutter is locked with a padlock having a shackle, fitted on an eyelet of shutter from outside. The eyelet would enter into projection provided on rolling shutter guide. However, the eyelet and padlock of such type of the existing rolling shutter 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.

[0129] Further, this existing rolling shutter locking arrangement is easily breakable by inserting jemmy in the shackle of the padlock or by inserting the jemmy between the fixed eyelet and moving eyelet and to thereby breaking the eyelets.

[0130] Further, this existing rolling shutter locking arrangement is easily breakable by cutting the eyelets of rolling shutter or by cutting the shackle of padlock by using hand cutter or gas cutter.

[0131] Thereby, the existing rolling shutter locking arrangement is not safe and secure for the enclosed property.

[0132] A lock assembly (1000), of the present disclosure, for a rolling shutter will now be described in detail with reference to Figure 2 A through Figure 18C.

[0133] Figure 2A illustrates a front view of the rolling shutter lock assembly (1000) in accordance with the present disclosure. Figure 2B illustrates a top view of the rolling shutter lock assembly (1000). Figure 2C illustrates a back view of the rolling shutter lock assembly (1000). Figure 3 illustrates an exploded view of the rolling shutter lock assembly (1000). The rolling shutter has a guide (B) which has an aperture configured thereon. The lock assembly (1000) is configured to be mounted on an inside surface of shutter panel.

[0134] The lock assembly (1000) comprises a lock case (10) defined by a base and side walls extending from the base in a substantially perpendicular direction. Figure 9A illustrates an inside front view of the lock case (10) of the rolling shutter lock assembly (1000). Figure 9B illustrates a side view of the lock case (10) of the rolling shutter lock assembly (1000) of figure 9A. The base has an arcuate groove configured on an operative inner surface thereof. A first connector (15) is configured to extend from the operative inner surface adjacent to the groove, while a second connector (16) is configured to extend from the operative inner surface at a spaced apart distance from the first connector (15).

[0135] An aperture (12) is configured on the lock case (10) for receiving the cylinder bush (50). A plurality of tubular projections (13) is configured on the lock case (10) for receiving rolling shutter lock fixing screws therein. A plurality of projections (14) is configured on the lock case (10) for allowing attachment of the cover plate (20) therewith. A plurality of projections (17) is configured on the lock case (10) for allowing attachment of the cylinder support plate (90) therewith.

[0136] A first sidewall of the lock case (10) has an opening (11) configured thereon.

[0137] The lock assembly (1000) further comprises a first bracket (40), a second bracket (70), a slider (30) and a dead bolt (31) configured to be installed in the lock case (10). More specifically, the first bracket (40) is configured to be pivotably received in the groove. The first bracket (40) has a stub (44) extending therefrom. The second bracket (70) is pivotably mounted on the first bracket (40). The second bracket (70) is configured to abut the first connector (15) in a locked configuration of the lock assembly (1000). The slider (30) is mounted on the second bracket (70). The slider (30) has a slit (34) configured thereon for receiving the second connector (16) therein to enable linear displacement of the slider (30) along the length of the slit (34). The dead bolt (31) is attached to the slider (30). The dead bolt (31) is configured to be received in the lock case (10) in an unlocked configuration of the lock assembly (1000), and is further configured to extend from the opening (11) of the lock case (10) in the locked configuration of the lock assembly (1000).

[0138] The lock assembly (1000) also comprises a cover plate (20) for the lock case (10). Figure 10A illustrates a front view of the cover plate (20). Figure 10B illustrates a cross sectional view of the cover plate (20) along plane P-P of figure 10A. The cover plate (20) is defined by an operative inner surface which faces the inside of the lock case (10), and an operative outer surface. The cover plate (20) is configured to be mounted on an outside surface of shutter panel. The lock case (10) and the cover plate (20) are attached to each other with the help of fasteners. The first slot (22) is configured on the cover plate (20) for receiving the key. In an embodiment, the first slot (22) is configured on the cover plate (20) co-axial to the central axis of the lock cylinder (80), the driving crank (60), the first bracket (40) and a cylinder guide bush (50). The cover plate (20) further includes a plurality of second slots (23) for receiving rolling shutter lock fixing screws, a plurality of third slots (24) for receiving cover plate fixing screws, and a plurality of forms (21) for facilitating proper resting of screws on the cover plate (20). Figure 17A illustrates a front view of the front plate assembly. Figure 17B illustrates a top view of the front plate assembly of Figure 17A. Figure 18A illustrates a front view of the lock assembly (1000) as seen from outside of shutter with the front plate by means of plurality of fastening means (screws). Figure 18B illustrates a top view of the lock assembly (1000) as seen from outside of shutter with the front plate of figure 18 A. Figure 18C illustrates a front view of the lock assembly (1000) as seen from inside of shutter with the front plate of figure 18 A.

[0139] A lock cylinder (80) is attached to the operative inner surface of the lock case (10). The lock cylinder (80) has an opening (80a) configured to extend from an operative outer surface of the cover plate (20) to receive a key (100) therein to enable locking and unlocking of the lock assembly (1000). A driving crank (60) is configured to be attached to an operative free end of the lock cylinder (80). The driving crank (60) has a lip (61) extending therefrom. The lip (61) has a pair of side edges (61A, 61B) configured to abut the stub (44) of the first bracket (40). Figure 14A illustrates a front view of the driving crank (60). Figure 14B illustrates a top view of the driving crank (60) of figure 14A.

[0140] In an embodiment, the driving crank (60) is configured to be mounted on the cylinder support plate (90) provided on the lock cylinder (80). Figure 16A illustrates a front view of the cylinder support plate (90). Figure 16B illustrates a top view of the cylinder support plate (90) of figure 16 A. The cylinder support plate (90) includes a pair of apertures (91) configured thereon for allowing attachment of the cylinder support plate (90) with the lock case (10). An aperture (92) is configured on the cylinder support plate (90) to receive the lock cylinder (80) thereon and further configured to restrict the rotational movement of the lock cylinder (80).

[0141] Figure 4A illustrates a front view of the rolling shutter lock assembly (1000) in a locked position. Figure 4B illustrates a cross-sectional view of the rolling shutter lock assembly (1000) along plane P-P of Figure 4A. Figure 5A illustrates a front view of the rolling shutter lock assembly (1000) in an unlocked position. Figure 5B illustrates a cross-sectional view of the rolling shutter lock assembly (1000) along plane Q-Q of Figure 5A.

[0142] To facilitate locking of the lock assembly (1000), the key (100) is rotated in a first angular direction to allow rotation of the lock cylinder (80) there along to enable abutment of a first operative edge of the driving crank (60) with the stub (44) to angularly displace the first bracket (40) and the second bracket (70) in the first direction to lockably abut the second bracket (70) against the first connector (15), and enable linear displacement of the slider (30), and therefore of the dead bolt (31) in a first linear direction, out of the lock case (10) into the aperture of the guide (B).

[0143] Conversely, to facilitate unlocking of the lock assembly (1000), the key (100) is rotated in a second angular direction to allow rotation of the lock cylinder (80) there along to enable abutment of a second operative edge of the driving crank (60) with the stub (44) to angularly displace the first bracket (40) and the second bracket (70) in the second direction and release the second bracket (70) from the first connector (15), and enable linear displacement of the slider (30), and therefore of the dead bolt (31) in a second linear direction, out of the aperture of the guide (B) into the lock case (10).

[0144] In an embodiment, the first connector (15) is configured to avoid tampering of the lock assembly (1000) by withstanding any force applied on the dead bolt (31), second bracket (70) and the slider (30), and prevent their bending during theft attempt and further helps in avoiding failure of the driving crank (60) and the lock cylinder (80).

[0145] Figure 6 illustrates an inside view of the lock assembly (1000) having dead bolt (31) is in locked position and key (100) in withdrawal position. Figure 7 illustrates an inside view of the lock assembly (1000) having dead bolt (31) is in mid position of the locked position and key (100) in inserted position. Figure 8 illustrates an inside view of the lock assembly (1000) having dead bolt (31) in unlocked position and key (100) in withdrawn position. In an embodiment, the dead bolt is a relatively long bolt.

[0146] Figure 12A illustrates a front view of the first bracket assembly. Figure 12B illustrates a top view of the first bracket assembly of figure 12 A. In an embodiment, the first bracket (40) comprises a pair of arms (40A, 40B), each arm configured to extend from a vertical wall in opposite directions to define a Z-shaped stepped bracket. In another embodiment, the first bracket (40) includes a first dowel (42) extending from a first arm (40A) of the pair of arms (40A, 40B) in a direction substantially perpendicular to the plane of the first arm (40A). The first dowel (42) includes a groove (43) configured thereon for receiving a circlip therein. In yet another embodiment, the first bracket (40) includes a first hole (41) configured on the second arm (40B) of the pair of arms (40A, 40B). In still another embodiment, the first bracket (40) includes a concaved bush (50) configured to be received in the first hole (41) to facilitate pivotable attachment of the first bracket (40) with the lock case (10). The bush (50) further configured to receive the operative free end of the lock cylinder (80) therein. Figure 13A illustrates a front view of the cylinder bush (50). Figure 13B illustrates a cross-sectional view of the cylinder bush (50) along plane P-P of figure 13 A. The cylinder bush (50) is configured to be mounted on the first bracket (40). A concaved tubular portion (51) is configured on the bush (50) for receiving the lock cylinder (80) therein. The cylinder bush (50) is configured to be mounted on lock case (10) by press fitting them together. A flange portion (52) is configured on the bush (50) for holding the first bracket (40) with the lock case (10).

[0147] In an embodiment, the second bracket (70) is defined by a narrow body having a neck (74) extending from an operative first end thereof. The neck (74) has a tongue (73) extending therefrom, the tongue (73) being configured to abut the first connector (15) in the locked configuration of the lock assembly (1000). In another embodiment, the neck (74) has an arcuate configuration complementary to the configuration of the lock cylinder (80) to facilitate nesting of the lock cylinder (80) therein, more specifically in the space formed between the neck (74) and the tongue (73). In yet another embodiment, the second bracket (70) includes a second hole (71) configured on the neck (74) for receiving the first dowel (42) therein to facilitate pivotable mounting of second bracket (70) on the first bracket (40). In still another embodiment, the second bracket (70) includes a second dowel (72) configured on the body thereof. The second dowel (72) includes a groove (72A) configured thereon for receiving a circlip therein. Figure ISA illustrates a front view of the second bracket assembly. Figure 15B illustrates a top view of the second bracket assembly of figure 15 A.

[0148] Figure 11A illustrates a front view of the slider (30) assembly. Figure 11B illustrates a bottom view of the slider (30) assembly of figure 11 A. Figure 11C illustrates a side view of the slider (30) assembly of figure 11 A. In an embodiment, the slider (30) includes a third hole (33) configured thereon. The third hole (33) is configured to receive the second dowel (72) therein to facilitate mounting of the slider (30) on the second bracket (70). In another embodiment, the slider (30) includes a leg (30A) extending therefrom. The leg (30A) is configured to facilitate attachment of the dead bolt (31) thereon. In yet another embodiment, the slider (30) includes a biasing element (39) provided on an operative rear surface of the slider (30). The biasing element (39) is configured to facilitate slidably displacement of the slider (30) along the second connector (16). The slider (30) is configured to allow mounting of the locking means (31) thereon by means of locking pins (32). The slider (30) further includes a first flange (36) configured to provide strength to the slider (30) and to avoid lifting of the slider (30) during locking and unlocking condition. The slider (30) includes a bush (35) provided thereon, and configured to avoid lifting of slider (30) during operation.

[0149] In an embodiment, the strengthening plate (31 A) is attached to bottom surface of slider (30). The strengthening plate (31 A) helps in avoiding the bending of the slider (30) during a theft attempt, and provide additional strength to the slider (30). The slider (30) includes a pair of projection (37, 38) for holding the biasing element (39).

[0150] In an embodiment, the first connector (15) and the second connector (16) are vertical columns.

[0151] The rolling shutter further incudes a front plate (110) which is mounted on the rolling shutter opposite to the lock case (10). The lock case (10) and front plate (110) is configured to be mounted on the rolling shutter by means of plurality of threaded fasteners from outside face and passing through the rolling shutter. The front plate (110) is configured with an aperture (111) for opening means the key (100). The front plate (110) is configured with a plurality of apertures (112) for lock assembly fixing screws. The front plate (110) is configured with a dust cover (113) to avoid the ingress of dust into the lock cylinder (80) and further prevent any probability of the lock cylinder being stuck during operation.

[0152] The lock assembly (1000) is robust in nature owing to the various components provided therein, and is also unbreakable or tamper proof. It is easy to manufacture and assemble, and used to provide a smooth locking and unlocking function. These factors enable the lock assembly to provide an improved sense of security, which is further enhanced by the fact that the lock assembly (1000) is not fully exposed to outside. Additionally, due to its robust nature, the lock assembly can be made with minimum weight and dimensions and still be secure.

[0153] 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.

[0154] TECHNICAL ADVANCEMENT

[0155] The present disclosure described herein above has several technical advantages including, but not limited to, a lock assembly for a rolling shutter, which:

[0156] • is robust;

[0157] • provides improved security;

[0158] • provides smooth locking and unlocking function;

[0159] • is easy to be manufactured and assembled at low cost;

[0160] • has reduced weight and dimensions; and

[0161] • is difficult to tamper with or to break open.

[0162] The disclosure has been described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.

[0163] The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein. The foregoing description of the specific embodiments so fully revealed 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.

[0164] Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element or group of elements, but not the exclusion of any other element or group of elements.

[0165] 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.

[0166] Any discussion of 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.

[0167] 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.

Claims

CLAIMS:

1. A lock assembly (1000) for a rolling shutter having a guide (B) provided thereon, wherein the guide (B) has an aperture configured thereon, said lock assembly (1000) comprising:• a lock case (10) defined by a base and side walls extending from said base in a substantially perpendicular direction, said base having an arcuate groove configured on an operative inner surface thereof, a first connector (15) configured to extend from said operative inner surface adjacent to said groove, and a second connector (16) configured to extend from said operative inner surface at a spaced apart distance from said first connector (15), a first sidewall having an opening (11) configured thereon;• a first bracket (40) configured to be pivotably received in said groove, said first bracket (40) having a stub (44) extending therefrom;• a second bracket (70) pivotably mounted on said first bracket (40), said second bracket (70) configured to abut said first connector (15) in a locked configuration of said lock assembly (1000);• a slider (30) mounted on said second bracket (70), said slider (30) having a slit (34) configured thereon for receiving said second connector (16) therein to enable linear displacement of said slider (30) along the length of said slit (34); a dead bolt (31) attached to said slider (30), said dead bolt (31) configured to be received in said lock case (10) in an unlocked configuration of said lock assembly (1000), and further configured to extend from said opening (11) of said lock case (10) in the locked configuration of said lock assembly (1000);• a cover plate (20) for said lock case (10);• a lock cylinder (80) attached to lock case (10) said lock cylinder (80) having an opening (80a) configured to extend from an operative outer surface of said cover plate (20) to receive a key (100) therein to enable locking and unlocking of the lock assembly (1000); and• a driving crank (60) configured to be attached to an operative free end of said lock cylinder (80), said driving crank (60) having a lip (61) extending therefrom, said lip (61) having a pair of side edges (61A, 61B) configured to abut said stub (44) of said first bracket (40); wherein, to facilitate locking of said lock assembly (1000), the key (100) is rotated in a first angular direction to allow rotation of said lock cylinder (80) there along to enable abutment of a first operative edge of said driving crank (60) with said stub (44) to angularly displace said first bracket (40) and said second bracket (70) in said first direction to lockably abut said second bracket (70) against said first connector (15), and enable linear displacement of said slider (30), and therefore of said dead bolt (31) in a first linear direction, out of said lock case (10) into the aperture of the guide (B); and wherein, to facilitate unlocking of said lock assembly (1000), the key (100) is rotated in a second angular direction to allow rotation of said lock cylinder (80) there along to enable abutment of a second operative edge of said driving crank (60) with said stub (44) to angularly displace said first bracket (40) and said second bracket (70) in said second direction and release said second bracket (70) from said first connector (15), and enable linear displacement of said slider (30), and therefore of said dead bolt (31) in a second linear direction, out of the aperture of the guide (B) into said lock case (10).

2. The lock assembly (1000) as claimed in claim 1, wherein said cover plate (20) includes a first slot (22) configured thereon for receiving the key (100) therein.

3. The lock assembly (1000) as claimed in claim 2, wherein said first slot (22) is configured on said cover plate (20) co-axial to the central axis of said lock cylinder (80), said driving crank (60) and said first bracket (40).

4. The lock assembly (1000) as claimed in claim 1, wherein said first bracket (40) comprises a pair of arms (40A, 40B), each arm (40A, 40B) configured to extend from a vertical wall in opposite directions to define a Z-shaped stepped bracket.

5. The lock assembly (1000) as claimed in claim 4, wherein said first bracket (40) includes a first dowel (42) extending from a first arm (40A) of said pair of arms (40A, 40B) in a direction substantially perpendicular to the plane of said first arm (40 A).

6. The lock assembly (1000) as claimed in claim 4, wherein said first bracket (40) includes a first hole (41) configured on said second arm (40B) of said pair of arms (40A, 40B).

7. The lock assembly (1000) as claimed in claim 4, wherein said first bracket (40) includes a concaved bush (50) configured to be received in said first hole (41) to facilitate pivotable attachment of said first bracket (40) with said lock case (10), said bush (50) being further configured to receive said operative free end of said lock cylinder (80) therein.

8. The lock assembly (1000) as claimed in claim 1, wherein said second bracket (70) is defined by a narrow body having a neck (74) extending from an operative first end thereof, said neck (74) having a tongue (73) extending therefrom, said tongue (73) being configured to abut said first connector (15) in said locked configuration of said lock assembly (1000).

9. The lock assembly (1000) as claimed in claim 8, wherein said neck (74) has an arcuate configuration complementary to the configuration of said lock cylinder (80) to facilitate nesting of said lock cylinder (80) therein.

10. The lock assembly (1000) as claimed in claim 8, wherein said second bracket (70) includes a second hole (71) configured on said neck (74) for receiving said first dowel (42) therein to facilitate pivotable mounting of second bracket (70) on said first bracket (40).

11. The lock assembly (1000) as claimed in claim 8, wherein said second bracket (70) includes a second dowel (72) configured on said body thereof.

12. The lock assembly (1000) as claimed in claim 1, wherein said slider (30) includes a third hole (33) configured thereon, said third hole (33) being configured to receive said second dowel (72) therein to facilitate mounting of said slider (30) on said second bracket (70).

13. The lock assembly (1000) as claimed in claim 1, wherein said slider (30) includes a leg (30A) extending therefrom, said leg (30A) being configured to facilitate attachment of said dead bolt (31) thereon.

14. The lock assembly (1000) as claimed in claim 1, wherein said slider (30) includes a strengthening plate (31 A) attached to said leg (30A) & slider (30).

15. The lock assembly (1000) as claimed in claim 1, wherein said slider (30) includes a first flange (36) configured thereon, said first flange (36) being configured to provide strength to the slider (30) and to avoid lifting of the slider (30) during locking and unlocking condition.

16. The lock assembly (1000) as claimed in claim 1, wherein said slider (30) includes a biasing element (39) provided on an operative rear surface of said slider (30), said biasing element (39) being configured to facilitate slidably displacement of said slider (30) along said second connector (16).

17. The lock assembly (1000) as claimed in claim 1, wherein said first connector (15) and said second connector (16) are vertical columns.

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