A lock device

Abstract

A lock device including a lock housing, and a barrel movably secured within the lock housing is described. The barrel includes a key insertion passage for receiving a key. A first barrel body being ingressed into the lock housing and a set of tumblers provided in the first barrel body for movement into and out of engagement with the lock housing. Radial movement of the set of tumblers displaces between an extended position and a retracted position to selectively engage and disengage with the lock housing upon insertion and removal of the key to selectively lock and unlock the barrel relative to the lock housing. A second barrel is ingressed into the housing and is positioned on to the first barrel body. The second barrel body being configured to displace independently from the first barrel body upon receiving a torque exceeding a pre-determined limit acting on the second barrel body.

Description

TITLE: A LOCK DEVICETECHNICAL FIELD

[0001] The present disclosure relates in general to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to vehicles, for example a two-wheeled vehicle. More particularly, the present disclosure relates to a lock device for the vehicle.BACKGROUND

[0002] The information in this section merely provides background information related to the present disclosure and may not constitute prior art(s) for the present disclosure.

[0003] The vehicles including the two-wheeled vehicle, three-wheeled vehicle or four-wheeled vehicle is a significant mode of transport. It is vastly used as a point-to- point mode of transport in rural and urban areas. Generally, these vehicles can be accessed and operated by use of a legitimate mechanical key which will be inserted into the lock system in the vehicle to unlock or turn ON the vehicle or even use other applicable features of the vehicle.

[0004] One known cylinder lock comprises a cylinder, a barrel rotatable in the cylinder in both directions, an axial aperture in the barrel for receiving a key, and a set of tumblers mounted in the barrel for, radial movement into and out of engagement with the cylinder. Such locks are operated by a legitimate mechanical key that provided with a cam surfaces. The cam surfaces of the legitimate mechanical key engage the tumblers to effect radial movement thereof in response to a rotational movement of the key.

[0005] These unique lock and key combinations allow only the authorized personnel to operate or use the vehicle. However, the conventional locks can be easily damaged by miscreants / thieves by inserting objects such as theft tools, screw drivers, wires, pins, and other objects to steal the vehicle.

[0006] A cylinder lock in which, when anything other than a legitimate mechanical key is inserted into the barrel and forcibly pivoted, some of the tumblers are moved or broke due to high forces, thus allowing rotation of the barrel. Despite numerous developments in lock technology, several problems still exist with conventional locks. These conventional locks can be damaged, and vehicle can be taken-away.

[0007] The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the prior art.SUMMARY

[0008] One or more shortcomings of the prior art are overcome by device as disclosed henceforth and additional advantages are provided through the device as described in the present disclosure.

[0009] Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

[0010] In accordance with an aspect of the present disclosure, a lock device is described. The lock device is provided for actuation of handle lock and / or an ignition lock of a vehicle. The lock device includes a lock housing, a barrel movably secured within at least a portion of the lock housing. The barrel includes a key insertion passage for receiving a key. A first barrel body being ingressed into the lock housing and a set of tumblers provided in the first barrel body for radial movement into and out of engagement with the lock housing. The key is provided with cam surfaces for engaging the set of tumblers thereof. Radial movement of the set of tumblers displaces between an extended position and a retracted position to selectively engage and disengage with the lock housing upon insertion and removal of the key to selectively lock and unlock the barrel relative to the lock housing. A second barrel is ingressed into the housing and is positioned on to the first barrel body. The second barrel body being configured to displace independently from the first barrel body upon receiving a torque acting on the second barrel body exceeds a pre-determined limit.

[0011] In an embodiment, wherein the lock housing defines a hollow cylindrical portion having an inner surface defined with a set of serrations, wherein set of serrations configured to receive a corresponding set of tumblers. The set of tumblers radially displaces between an extended position and retracted position within slots defined in the barrel to selectively engage and disengage the barrel with the lock cover.

[0012] In an embodiment, the first barrel body is defined with at least one notch along a peripheral portion of the first barrel body. The second barrel body is defined with at least one projection on a face facing the first barrel body and being structured to be received in the at least one notch of the first barrel body.

[0013] In an embodiment, at least one projection of the second barrel body being configured to shear relative to the at least one notch upon receiving the torque acting on the second barrel body exceeds a pre-defined limit to displace the second barrel body independently from the first barrel body.

[0014] In an embodiment, the barrel is displaceable between a first position corresponding to lock condition and a second position corresponding to unlock condition upon the barrel being operated by the key.

[0015] In accordance with another aspect of the present disclosure, a vehicle is described. The vehicle includes a body frame, a steering mechanism, and a lock device. The lock device is provided for actuation of handle lock and / or an ignition lock of a vehicle. The lock device includes a lock housing, a barrel movably secured within at least a portion of the lock housing. The barrel includes a key insertion passage for receiving a key. A first barrel body being ingressed into the lock housing and a set of tumblers provided in the first barrel body for radial movement into and out of engagement with the lock housing. The key is provided with cam surfaces for engaging the set of tumblers thereof. Radial movement of the set of tumblers displaces between an extended position and a retracted position to selectively engage and disengage with the lock housing upon insertion and removal of the key to selectively lock and unlock the barrel relative to the lock housing. A second barrel is ingressed into the housing and is positioned on to the first barrel body. The second barrel body being configured to displace independently from the first barrel bodyupon receiving a torque acting on the second barrel body exceeds a pre-determined limit. The configuration of the lock device provides an antitheft feature for the vehicle. The lock device of present disclosure cannot be tampered using mala fide acts.

[0016] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

[0017] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.BRIEF DESCRIPTION OF FIGURES

[0018] The novel features and characteristics of the disclosure are set forth in the description. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:

[0019] FIG.l illustrates a plan view of a vehicle having a locking device, in accordance with an embodiment of the present disclosure;

[0020] FIG.2 illustrates a perspective view of the locking device, in accordance with an embodiment of the present disclosure;

[0021] FIG.3 illustrates a partially exploded view of the locking device of FIG.2;

[0022] FIG.4 illustrates a sectional view of the locking device of FIG.2;

[0023] FIG.5 illustrates an enlarged view of the of the lock device depicting a barrel, in accordance with an embodiment of the present disclosure; and

[0024] FIG.6 illustrates an exemplary schematic view of the lock device with a theft tool.

[0025] Skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of embodiments of the present disclosure.DETAILED DESCRIPTION

[0026] While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure as defined by the appended claims.

[0027] Before describing detailed embodiments, it may be observed that the novelty and inventive step that are in accordance with the present disclosure resides in a lock device. More particularly, a groove defined on the barrel of the lock device. However, such modifications should be construed within the scope of the present disclosure. Accordingly, the drawings are showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

[0028] The term “comprises”, comprising, or any other variations thereof, are intended to cover non-exclusive inclusions, such that a device, structure, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such device or structure or method. In other words, one or more elements in a device proceeded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the device.

[0029] The following paragraphs describe the present disclosure with reference toFIG(s) 1 to 5. In the figure, the same element or elements which have similarfunctions are indicated by the same reference signs. With general reference to the drawings, a lock device for a vehicle in accordance with preferred embodiments of the present disclosure is illustrated and generally identified with reference numeral 200. The vehicle which embodies the lock device (200) in accordance with the present disclosure is depicted in corresponding figures with reference numeral 100. It will be understood that the teachings of the present disclosure are not limited to any particular vehicle. Also, the corresponding figures illustrate only a schematic of the lock device (200). The complete vehicle is not illustrated in the corresponding figures for ease of understanding of the invention.

[0030] The terms “vehicle”, “modular vehicle”, “two-wheeled vehicle”, “electric vehicle” and “motorcycle” have been interchangeably used throughout the description. The term “vehicle” comprises vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicle, and the like. In the present disclosure, the term “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment or implementation of the present subject matter described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0031] While the present disclosure is illustrated in the context of a two wheeled vehicle, the features illustrated thereof can be used with other type of vehicles as well. The terms “vehicle”, “two-wheeled vehicle”, “electric vehicle”, “EV”, “modular vehicle” and “motorcycle” have been interchangeably used throughout the description. The term “vehicle” comprises vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicle, and the like. The term “modular vehicle” refers to vehicle that can be selectively converted between one of a two-wheeled configuration and a multi-wheeled configuration. The terms “front / forward”, “rear / rearward / back / backward”, “up / upper / top”, “elevated / closed”, and “down / lower / lower ward / downward, bottom”, used therein represents the directions as seen from a vehicle driver sitting astride.

[0032] The following detailed description is merely exemplary in nature and is not intended to limit application and uses. Furthermore, there is no intention to be bound by any theory presented in the preceding background or summary or the following detailed description. It is to be understood that the disclosure may assume variousalternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices or components illustrated in the attached drawings and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hereinafter, preferred embodiments of the present disclosure will be descried referring to the accompanying drawings. While some specific terms of “front / forward”, “rear / rearward / back / backward”, “up / upper / top”, “down / lower / lower ward / downward, bottom”, “left / leftward”, “right / rightward” and other terms containing these specific terms and directed to a specific direction will be used, the purpose of usage of these terms or words is merely to facilitate understanding of the present invention referring to the drawings. Accordingly, it should be noted that the meanings of these terms or words should not improperly limit the technical scope of the present invention.

[0033] Also, it is to be understood that the phraseology and terminology used herein is for description and should not be regarded as limiting. Unless specified or limited otherwise, the terms “secured” “accommodated,” “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings. It is to be understood that this disclosure is not limited to the specific devices, methods, applications, conditions, or parameters described and / or shown herein and that the terminology used herein is to describe embodiments by way of example and is not intended to be limiting of the claimed invention. Hereinafter in the following description, various embodiments will be described. For purposes of explanation, specific configurations and details are outlined to provide a thorough understanding of the embodiments. However, it will also be apparent to one skilled in the art that the embodiments may be practiced without the specific details. Furthermore, well-known features may be omitted or simplified in order not to obscure the embodiment being described.

[0034] Reference will now be made to the exemplary embodiments of the disclosure accompanying drawings. Wherever possible, same numerals will be used to refer to the same or like parts. Embodiments of the disclosure are described in the followingparagraphs with reference to FIG.l to 6. In Figures. 1 to 6, the same element or elements which have same functions are indicated by the same reference signs.

[0035] Referring to FIG.l, a portion of a two- wheeled vehicle (100) according to an embodiment of the present disclosure is illustrated. The two-wheeled vehicle (100) referred to herein, embodies two-wheeled motorcycle and interchangeably referred to as “the vehicle (100)”. Alternatively, the vehicle (100) may embody any other ridden vehicles such as all-terrain vehicles and the like, without limiting the scope of the present disclosure. In forthcoming paragraphs, the vehicle (100) and the configuration of the same is elucidated. Although the description elucidates various body parts of the vehicle, in the corresponding figures reference is made only to those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

[0036] The two-wheeled vehicle (100) in accordance with the embodiment of the present disclosure may embody a saddle type riding vehicle or a scooter. The vehicle comprises a front-end assembly (220), a rear end assembly (not shown). The front-end assembly (220) forms the front portion of the vehicle (100). The rear end assembly may define the rear portion of the vehicle (100). In case of the scooter / moped, a foot board may be defined between the front-end assembly (220) and the rear portion and the footboard provided footrest for rider riding the vehicle (100).

[0037] The rear end assembly among other components comprises a seat assembly, optionally a storage area (not shown), a rear ground engaging member (not shown), and a power unit (not shown). The seat assembly provides seating for a rider and pillion of the vehicle. The storage is provided under the seat assembly. The storage area allows storage of small articles within the vehicle. In an embodiment, size of the storage area provided in the vehicle i.e., under the seat may vary based on the type of the vehicle (100). Further, the rear ground engaging member (not shown) underlies the seat assembly and is driven by the power unit. The power unit (not shown) may include an internal combustion engine and a transmission unit. In an embodiment, the power unit may also be an electric or traction motor without deviating from the scope of the present disclosure. The rear end assembly further includes additionalcomponents such as suspension systems, taillights, rear grips [also referred to as grab rails] without limiting the scope of the present disclosure.

[0038] The front-end assembly (220) of the present disclosure among other components / features includes a front ground engaging member (102), a steering mechanism (112). The front ground engaging member (102) may be operatively connected to the steering mechanism (112). The steering mechanism (112) includes a handlebar (112a). The handlebar (112a) may be configured to be rotated by the rider to steer the vehicle (100). In an embodiment, the front-end assembly (220) of the vehicle (100) may also comprise a lock device (200) for actuation of handle lock and / or an ignition lock of the vehicle (100). The lock device (200) in accordance with the present disclosure may be provided on a portion of the handlebar (112a) as apparent from FIG.l. In an implementation, the lock device (200) of the present disclosure may be provisioned in conjunction with a fuel tank of the vehicle (100) without deviating from the scope of the present disclosure. In an alternative embodiment, the lock device (200) may also be used for actuation of the seat assembly from a closed condition to an open position. In another alternative embodiment, the lock device (200) may be used for myriad application where the need for locking is necessary. The configuration of the lock device (200) is elucidated in the forthcoming paragraphs in conjunction with corresponding FIGs 2 to 6.

[0039] The front-end assembly (220) of the vehicle (100) further include a dash assembly (104). The dash assembly (104) comprises a display unit. The display unit displays information about the vehicle (100) to the rider. The display unit may further include a plurality of visual indicators (not shown) to indicate various functional parameters relating to the vehicle (100). The dash assembly (104) may comprise additional components such a, LCD, GPS, graphical user interface (GUI) etc, without limiting the scope of the invention. The front-end assembly (220) may further comprise additional components such as rear-view mirrors (108), headlamp / head light, front fender (above the front wheel), a plurality of blinkers (106), etc. with limiting the scope of the invention.

[0040] The vehicle (100) includes a body frame. The body frame comprises a head tube, a main tube / down frame [not shown]. The body frame supports the steeringmechanism (112) and the front ground engaging member (102) [also referred hereinabove and after as front wheel (102)] in the front portion of the vehicle (100) and rear ground engaging member in the rear portion of the vehicle. The steering mechanism (112) may be steerably mounted on the body frame of the vehicle (100).

[0041] Referring to FIG.2, which illustrates a perspective view of the lock device (200) embodied in the vehicle (100) of FIG.l. The configuration of the lock device (200) will be elucidated henceforth. In accordance with the present disclosure, the lock device (200) may be used for actuation of handle lock and / or an ignition lock of the vehicle (100). The lock device (200) may be provided on the portion of the steering mechanism (112). However, such configuration of the lock device (200) may be used for myriad purposes which necessitate the operation of locking and unlocking and such configuration should be contemplated herein. The lock device (200) may be provided with a key (202) [also referred to as a matching key (202) and alternatively used]. The matching key (202) may also be referred to as “coded key (202)” and may be alternatively / interchangeably used hereinafter.

[0042] The lock device (200) may be mounted to the vehicle (100) in any of the directions, depending upon the type of the vehicle (100). The lock device (200) of the present disclosure includes a lock housing (204), a lock piston (218) [also referred to as steering lock piston (218)], and a barrel (208) [refer FIG.3]. The lock housing (204) of the lock device (200) may be mounted on the portion of the vehicle (100). In a preferred embodiment, the lock housing (204) may be defined on the portion of the steering mechanism (112) of the vehicle (100). The lock housing (204) may be secured to the steering mechanism (112) of the vehicle (100) using known joining techniques such as thermal joining and / or mechanical joining. In an alternative embodiment, the lock housing (204) may be integrally defined with the steering mechanism (112) without deviating from the scope of the present disclosure. In an embodiment, the steering lock piston (218) may be accommodated in the lock housing (204). The steering lock piston (218) may be operably connected to the barrel (208) which may be operatively disposed within the lock housing (204). In an embodiment, the steering lock piston (218) may be provided integral to the barrel (208) without limiting the scope of the present disclosure.

[0043] The barrel (208) may include a key insertion passage (2085) (matching key inserted as depicted in FIGs 2 and 4] configured to receive the matching key (202). The barrel (208) may remain in a handle locked condition in the absence or withdrawal of the matching key (202). The barrel (208) may enter an unlocked condition and subsequently to ignition ON condition , as the matching key (202) is inserted into the barrel (208) through the key insertion passage (2085) [as apparent from FIG. 3]. In the intermediate position the matching key (202) is free for rotation along with the barrel (208) either in clockwise direction or anti-clockwise direction of the barrel (208) [as viewed from plan view]. That is with the aid of matching key (202), the barrel (208) can be rotated in the clockwise direction or anti-clockwise direction as viewed from top view of the barrel (208). In a preferred embodiment, the barrel (208) may be of a cylindrical shape and may be interchangeably referred to as the cylindrical barrel (208). However, the shape of the barrel (208) should not be construed as a limitation of the present disclosure as said barrel (208) may have different shapes geometrical or organic shapes such as rectangular, square, polygonal etc. and may be termed according without limiting the scope of the invention.

[0044] Further referring to FIG.3 to FIG.5 in conjunction, a perspective view of the lock device (200) partially exploded, a sectional view of the lock device (200), and a schematic of the barrel (208), respectively is illustrated. The barrel (208) of the present disclosure may further include a first barrel body (2081) and a second barrel body (2082). The key insertion passage (2085) may be extend through the first barrel body (2081) and the second barrel body (2082) to receive the matching key (202). In the forthcoming paragraphs, the first barrel body (2081) and the second barrel body (2082) is elucidated.

[0045] The first barrel body (2081) may be structured to be ingressed into the lock housing (204). The first barrel body (2081) may include a plurality of sliding members also referred to and interchangeably referred to as a set of tumblers (210) [hereinafter referred to as the tumblers (210)]. The set of tumblers (210) [as depicted in FIG.3, 4 and 5] may be disposed radially within the first barrel body (2081). In another embodiment, the tumblers (210) may be disposed circumferentially on the first barrel body (2081). The plurality of tumblers (210) may radially displace between an extended position and a retracted position relative to the lock housing(204). In an embodiment, the hollow cylindrical portion of the lock housing (204) may be defined with a plurality of serrations [not shown]. Each of the plurality of serrations may be configured to receive the corresponding tumbler of the tumblers(210) in the extended position. Further, the tumblers (210) may be stacked in the slots(211) [refer FIG. 3] of the first barrel body (2081). When the matching key (202) is not inserted in the first barrel body (2081), a portion of each of the plurality of tumblers (210) may remain outside the slots (211) of the first barrel body (2081) under the spring action. The portion of each of the plurality of tumblers (210) lock the first barrel body (2081) relative to the lock housing (204). Hence, in the absence of the matching key (202) in the barrel (208), the barrel (208) cannot be rotated within the lock housing (204) in either direction.

[0046] As described, the second barrel body (2082) may be ingressed into the lock housing (204) as shown in FIG. 4. The second barrel body (2082) may be positioned on the first barrel body (2081) disposed in the lock housing (204) such that a surface of the second barrel body (2082) facing the first barrel body (2081) may abut against the first barrel body (2081). The second barrel body (2082) may be structured to receive and the guide the matching key (202) to the key insertion passage (2085) defined in the first barrel body (2081). The second barrel body (2082) may be defined with at least one projection (2084) [as shown in FIGs. 3 and 5]. In an embodiment, the at least one projection (2084) may be defined along a peripheral portion of the first barrel body (2081). In an alternative implementation, the at least one projection (2084) may be extend from the surface facing the first barrel body (2081). The at least one projection (2084) may be receivable by at least one notch (2083) defined on the first barrel body (2081). The position of the at least one notch (2083) may complement the position of the at least one projection (2084). The at least one notch (2083) and the at least one projection (2084) may function in tandem to rotate the second barrel body (2082) and the first barrel body (2081) simultaneously between the handle locked condition, the unlocked condition and the ignition ON condition. The at least one projection (2084) of the second barrel body (2082) may be structured to shear relative to the at least one notch (2083) upon receiving the torque acting on the second barrel body (2082) that may exceed a pre-determined limit. Upon shearing of the at least one projection (2084), the second barrel body (2082) may rotate independently from the first barrel body (2081).

[0047] To rotate the barrel (208) i.e., the first barrel body (2081) and the second barrel body (2082), the matching key (202) may be inserted into the barrel (208). The matching key (202) may be inserted into the key insertion passage (2085) through the second barrel body (2082). The second barrel body (2082) may receive the key (202) insertion passage (2085) and guide the coded key (202) to the key insertion passage defined in the first barrel body (2081). The matching key (202) may be defined with at least a set of cuts also referred to as a set of cam surfaces (not explicitly depicted). The set of cam surfaces on the matching key (202) may engage with the tumblers (210) such a way that the in the first barrel body (2081) slide towards the axis of the barrel (208).

[0048] Hence, the portion of each of the plurality of tumblers (210) which is engaging the lock housing (204) in the absence of the matching key (202), now slides into the first barrel body (2081) as the matching key (202) is inserted into the key insertion passage (2085) of first barrel body (2081). Eventually unlocking the first barrel body (2081) relative to the lock housing (204) to make the barrel (208) i.e., both the first barrel body (2081) and the second barrel body (2082) operable or rotatable. The normal load from the rider / operator for operating the barrel (208) between the locked condition, the unlocked condition, and the ignition ON condition with the matching key (202) may range from about 1.5 ± 0.5 kg-f. In an event of burglary or theft of the vehicle (100), unauthorized person such as burglar or thief uses tools (300) (as shown in FIG. 6) such as screwdriver, hammer, pin, and the like to break the lock device (200) of the vehicle (100). In an event, when abrupt force acts on the lock device (200), the second barrel body (2082) in contact with the first barrel body (2081) shears relative to the first barrel body (2081) tampering the lock device (200). The abrupt force / load may also be referred to as the pre-determined load and may range from 6 Kg-f to 10 Kg-f. Said pre-determined load is illustrated for exemplary purpose only and should not be construed as a limitation of the present disclosure. The load referred to herein may be any abrupt force acting on the barrel (208) without limiting the scope of the present disclosure.

[0049] In case of load acting over and above the specified limit, the lock device (200) may be tampered which is the case with conventional locks and the vehicle may be stolen. The lock device (200) of the present disclosure is designed such that, in casethe load acting on the lock device (200) is over and above the specified limit, the second barrel body (2082) may be permanently sheared from the first barrel body (2081). Once the second barrel body (2082) is sheared from the first barrel body (2081), the second barrel body (2082) may rotate independently of the first barrel body (2081). FIG. 6 illustrates an exemplary schematic representation of the lock device (200) of the present disclosure with the theft tool (300). The theft tool (300) may have a maximum engagement area (301) i.e., in the second barrel body (2082), whereas the theft tool (300) may have minimum engagement area (302) in the first barrel body (2081). Once abrupt force / load acting over and above specified limit acts on the lock device (200), the theft tool (300) may shear the second barrel body (2082) from the first barrel body (2081). Thus rotating the second barrel body (2082) independently of the first barrel body (2081). Since, the second barrel body (2082) rotates independent of the first barrel body (2081), the theft tool (300) having maximum engagement area (301) may fail to further rotate the first barrel body (2081) even in case the load on the theft tool (300) is increased. As the second barrel body (2082) rotates independently of the second barrel body (2082) relative to the first barrel body (2081), the vehicle (100) is immobilised until the lock device (200) is completely replaced. This configuration of the lock device (200) prevents the vehicle (100) from being stolen.

[0050] In an embodiment, the lock device (200) of this configuration provides an antitheft feature for the vehicle (100). Advantageously, use of the lock device (200) is not limited to the vehicle operation, it has myriad applications. For instance, the lock device (200) may be used for seat lock and the like. The lock device (200) of present disclosure cannot be tampered using mala fide acts. Also, the lock device (200) prevents motor vehicle theft. If the lock device (200) of the present disclosure is subjected to tamper, the vehicle (100) is immobilized completely which ensures that the vehicle (100) cannot be moved until a technician replaces the lock device (200). The said features of the lock device (200) prevent burglary of the vehicle (100). The lock device (200) of the present configuration also has high torque resistance which ensures that the handle lock cannot be broken using small force.

[0051] The various embodiments of the present disclosure have been described above with reference to the accompanying drawings. The present disclosure is not limited tothe illustrated embodiments; rather, these embodiments are intended to disclose the subject matter of the disclosure fully and completely to those skilled in this art. In the drawings, like numbers refer to like elements throughout. Thicknesses and dimensions of some components may be exaggerated for clarity.

[0052] Herein, the terms “attached”, “connected”, “interconnected”, “contacting”, “mounted”, “coupled” and the like mean either direct or indirect attachment or contact between elements, unless stated otherwise.

[0053] Well-known functions or constructions may not be described in detail for brevity and / or clarity. As used herein the expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0054] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises. . .a”, “comprising”, “includes” and / or “including” when used in this specification, specify the presence of stated features, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, operations, elements, components, and / or groups thereof.

[0055] While considerable emphasis has been placed herein on the particular features of this disclosure, it will be appreciated that various modifications 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 modifications in the nature of the disclosure or the preferred embodiments 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.EQUIVALENTS:

[0056] The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the 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.

[0057] The foregoing description of the specific embodiments will so fully reveal 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.

[0058] Any discussion of documents, acts, materials, devices, articles and 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.

[0059] The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher / lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.

Claims

We claim:

1. A lock device (200) comprising: a lock housing (204); and a barrel (208) rotatable secured within the lock housing (204), the barrel (208) comprising: a key insertion passage (2085) for receiving a key (202); a first barrel body (2081) ingressed into the lock housing (204) and a set of tumblers (210) provided in the first barrel body (2081) for radial movement into and out of engagement with the lock housing (204), the key (202) is provided with cam surfaces for engaging the set of tumblers (210) thereof, radial movement of the set of tumblers (210) displaces between an extended position and a retracted position to selectively engage and disengage with the lock housing (204) upon insertion and removal of the key (202) to selectively lock and unlock the barrel (208) relative to the lock housing (204); a second barrel body (2082) ingressed into the lock housing (204) and positioned on to the first barrel body (2081); wherein the second barrel body (2082) being configured to displace independently from the first barrel body (2081) upon receiving a torque acting on the second barrel body (2082) exceeds a pre-determined limit.

2. The lock device (200) as claimed in claim 1, wherein the lock housing (204) defines a hollow cylindrical portion having an inner surface defined with a set of serrations, wherein set of serrations configured to receive a corresponding set of tumblers (210).

3. The lock device (200) as claimed in claim 1, wherein the set of tumblers (210) radially displaces between an extended position and retracted position within slots (211) defined in the barrel (208) to selectively engage and disengage the barrel (208) with the lock cover (204).

4. The lock device (200) as claimed in claim 1, wherein the first barrel body(2081) is defined with at least one notch (2083) along a peripheral portion of the first barrel body (2081).

5. The lock device (200) as claimed in claim 1, wherein the second barrel body(2082) is defined with at least one projection (2084) on a face facing the first barrel body (2081) and being structured to be received in the at least one notch(2083) of the first barrel body (2081).

6. The lock device (200) as claimed in any one of the previous claims, at least one projection (2084) of the second barrel body (2082) being configured to shear relative to the at least one notch (2083) upon receiving the torque acting on the second barrel body (2082) exceeds a pre-determined limit to displace the second barrel body (2082) independently from the first barrel body (2081).

7. The lock device (200) as claimed in claim 1, wherein the barrel (208) is displaceable between a handle lock condition, a unlocked condition and an ignition ON condition upon the barrel (208) being operated by the key (202).

8. A vehicle (100) comprising: a body frame; a steering mechanism (112); and a lock device (200) for actuation of handle lock and an ignition lock of a vehicle (100), the lock device (200) comprising: a lock housing (204); and a barrel (208) rotatable secured within the lock housing (204), the barrel (208) comprising: a key insertion passage (2085) for receiving a key (202); a first barrel body (2081) ingressed into the lock housing (204) and a set of tumblers (210) provided in the first barrel body (2081) for radial movement into and out of engagement with the lock housing (204); the key (202) is provided with cam surfaces for engaging the set of tumblers (210) thereof radial movement of the set of tumblers (210) displaces between an extended position and a retracted positionto selectively engage and disengage with the lock housing (204) upon insertion and removal of the key (202) to selectively lock and unlock the barrel (208) relative to the lock housing (204); a second barrel body (2082) ingressed into the lock housing (204) and positioned on to the first barrel body (2081); wherein the second barrel body (2082) being configured to displace independently from the first barrel body (2081) upon receiving a torque acting on the second barrel body (2082) exceeds a pre-determined limit.

9. The vehicle (100) as claimed in claim 8, wherein the lock cover (204) defines a hollow cylindrical portion having an inner surface defined with a set of serrations, wherein set of serrations configured to receive a corresponding set of tumblers (210), wherein the set of tumblers (210) radially displaces between an extended position and retracted position within slots (211) defined in the barrel (208) to selectively engage and disengage the barrel (208) with the lock cover (204).

10. The lock device (200) as claimed in claim 8, wherein the first barrel body (2081) is defined with at least one notch (2083) along a peripheral portion of the first barrel body (2081), wherein the second barrel body (2082) is defined with at least one projection (2084) on a face facing the first barrel body (2081) and being structured to be received in the at least one notch (2083) of the first barrel body (2081).

11. The lock device (200) as claimed in any one of the previous claims, at least one projection (2082) of the second barrel body (2082) being configured to shear relative to the at least one notch (2083) upon receiving the torque acting on the second barrel body (2082) exceeds a pre-defined limit to displace the second barrel body (2082) independently from the first barrel body (2081).

12. The lock device (200) as claimed in claim 8, wherein the barrel (208) is displaceable between a first position corresponding to lock condition and a second position corresponding to unlock condition upon the barrel (208) being operated by the key (202).

13. The vehicle (100) as claimed in claim 8 comprises a lock piston (218) operatively coupled to the barrel (208), the lock piston (218) being displaceable between an engaged position and disengaged position upon rotation of the barrel.

14. The vehicle (100) as claimed in claim 8, wherein the key (202) being defined with a set of cam surfaces structured to actuate the set of tumblers (210) to radially displace the set of tumblers (210) between the extended position and the retracted position within the slots (211) defined in the barrel (208) to selectively engage and disengage the barrel (208) with the lock cover (204).

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