AU2008207689B2

AU2008207689B2 - A lock

Info

Publication number: AU2008207689B2
Application number: AU2008207689A
Authority: AU
Inventors: Michael Brian Alchin
Original assignee: Azuma Design Pty Ltd
Current assignee: Azuma Design Pty Ltd
Priority date: 2007-09-13
Filing date: 2008-09-02
Publication date: 2015-03-12
Anticipated expiration: 2028-09-02
Also published as: AU2008207689A1

Abstract

Abstract A lock (10) having a pair of pivotally mounted lock tongues (17) that are moved angularly about parallel axes (18) between a retracted position located within the cover 5 handle (11) and an extended position engaging a striker (25). A slide member (21) is manipulated by a user and movable linearly to move the tongues (17) between the extended and retracted positions. -- * u -MF - 1 p

Description

S&F Ref: 875397 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address Azuma Design Pty Limited, of Applicant: an Australian company, ACN 002 031 307, of 160-162 Newton Road, Wetherill Park, New South Wales, 2164, Australia Actual Inventor(s): Michael Brian Alchin Address for Service: Spruson & Ferguson St Martins Tower Level 35 31 Market Street Sydney NSW 2000 (CCN 3710000177) Invention Title: A lock Associated Provisional Application Details: [33] Country: [31] Appl'n No(s): [32] Application Date: AU 2007905006 13 Sep 2007 The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(1387959_1) 1 A LOCK Technical Field The present invention relates to locks and more particularly to locks for sliding doors and windows. 5 Background of the Invention Typically locks for sliding doors and windows include a lock tongue that is of "hook" configuration, with the lock tongue pivoted about an axis between a striker engaging position, and a striker release position at which the door or window is free to move. 1o Previously known locks for sliding doors and windows that provided a certain degree of security, are generally complex and therefore expensive to manufacture. Object of the Invention It is the object of the present invention to overcome or substantially ameliorate at least one of the above disadvantages. is Summary of the Invention There is disclosed herein a lock to engage a striker, the lock including: a base; a pair of lock tongues each pivotally mounted on the base for angular movement about a respective pivot axis, with the axes being generally parallel and the tongues 20 moved in angularly opposite directions between an extended striker engaging position, and a retracted position at which the tongues would be disengaged from the striker; a slide member mounted on the base and guided for linear movement between a first position and a second position, and engaged with the tongues to cause movement thereof between the extended and retracted positions, with the first position of the slide 25 member corresponding to the extended position of the tongues, and the second position corresponding to the retracted position of the tongues; and 2 a user manipulated portion operatively associated with the slide member and manipulated by a user to cause movement of the slide member between the first and second positions, wherein said lock further includes a first key operated lock cylinder that is turned about a longitudinal axis by operation of a key, and a first cam member having an axis about which the cam member is angularly moved, the cam member axis being coincident with the longitudinal axis of the cylinder, with the longitudinal axis being generally parallel to the tongue axes, wherein, said first cam member comprises a circular disc having a pin for operative association with said slide member so that upon angular movement of the cylinder about the longitudinal axis, said slide member is caused to move between the first and second positions thereof. Preferably, each tongue has a slot extending at least partly radially relative to the axis of the respective tongue, and said slide member has two projections, each projection being located in a respective one of the slots so as to be slidably located therein. Preferably, said lock includes a handle with an aperture through which said portion projects so that it can be gripped by a user to manipulate the slide member to move the slide member between the first and second positions thereof Preferably, said portion projects from said slide member at least partly in a direction parallel to the tongue axes. In an alternative preferred form, said lock includes a second key operated lock cylinder, with said lock including a second cam member, said second cam member being engaged by the second cylinder, with the second cam and second cylinder having a longitudinal axis coincident with the axis of the first lock cylinder and first cam member, and wherein said second cam member is moved angularly by said first cam member about the longitudinal axis thereof to cause movement of the first cam member which in turn causes movement of the slide member between the first and second positions thereof. Preferably, said slide member has a recess, and said first cam member a projection located in said recess so that said first cam member causes movement of the slide member between the first and second positions thereof.

3 Preferably, in said alternative preferred form said portion is attached to said slide and projects laterally therefrom. Preferably, said lock includes a locking member operatively associated with the first cam member to engage the first cam member to retain the first cam member in a 5 predetermined position, and said second cam upon angular movement to cause movement of the first cam moves the locking member from engagement with the first cam member to provide for movement of the first cam member. Preferably, said lock includes a spring urging the locking member into engagement with the first cam. 10 Brief Description of the Drawings A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein: Figure 1 is a schematic parts exploded isometric view of a lock; Figure 2 is a schematic parts exploded isometric view of a modification of the 15 lock of Figure 1; and Figure 3 is a schematic parts exploded further isometric view of the lock of Figure 2. Detailed Description of the Preferred Embodiments In Figure 1 there is schematically depicted a lock 10. The lock 10 includes a 20 cover handle 11 that receives a locking assembly 12. The locking assembly 12 is received within a hollow portion 13 of the handle 11 and is enclosed by a cover 14. The assembly 12 includes a base 15 that provides a pair of pins 16 to support lock tongues 17 for angular movement about axes 18. The tongues 17 are of a hook configuration. The axes 18 are generally parallel and extend generally normal to the base 15. Each of the 25 lock tongues 17 has an aperture 19 within which a respective one of the pins 16 is slidably located. The base 15 has two pairs of flanges 20 that slidably guide a slide member 21 for linear movement in the direction 53. The direction 53 is generally normal to the axes 18. The slide member 21 has arms 22 that are each provided with a pin 23 at their extremity.

4 Each pin 23 is slidably received within a respective slot 24 of one of the lock tongues 17. Linear movement in the direction 53 of the member 21 causes angular movement of the lock tongues 17 in opposite angular directions. When the member 21 is in a first position the tongues 17 project through apertures 54 to engage a striker 25 to retain an associated 5 door or window in the closed position. When the member 21 is moved to a second position, the lock tongues 17 are moved to a retracted position located with the hollow portion 13 so that the associated door or window can be moved. Each slot 24 extends at least partly radially relative to the axis 18. In this embodiment, the slide member 21 has a portion 26 that projects through 10 an aperture 27 in the handle 11 so that it can be gripped by a user to move the slide member in the direction 53 between the first and second positions thereof, and therefore move the lock tongues 17 between the striker engaging (extended) position and the release (retracted) position. The portion 26 projects from the slide member 21 in a direction generally is parallel to the axes 18. The base 15 also slidably receives a cam member 28 having a hub 29 slidably received in the central aperture 30 of the base 15 for angular movement about the axis 52. The axis 52 is generally parallel to the axes 18. The cam member 28 has a pin 31 that engages within a recess 32 in the member 21. Typically the lock 10 would be mounted 20 on a door, with the "outside" of the door being provided with a key operated lock cylinder having a longitudinal axis coincident with the axis 52. The lock cylinder would engage the hub 29 so that upon a user operating the lock cylinder with the key, the cam member 28 is caused to move angularly about the axis 52 to thereby cause linear movement of the member 21 in the direction 53, in turn causing angular movement of the tongues 17 25 between the positions thereof. As best seen in Figure 1, the cover 14 has a central aperture 33 that receives the hub 29 and via which the lock cylinder has operative access to the cam member 28. The cover 14 also has apertures 34 that are aligned with apertures 35 of the handle 11 so that threaded fasteners may pass through the apertures 35, through the pins 16 and apertures 30 34 to threadably engage the door to secure the handle 10 to the associated door.

5 The above lock 10 operates as a latch, with loss motion being provided between the above described lock cylinder and cam member 28. This provides for operation of the slide member 21 from the inside independent of the lock cylinder. In Figures 2 and 3, there is schematically depicted a modification of the lock 10. 5 In this embodiment a second base 36 is provided that forms part of the assembly 12. The cam member 28 is replaced with a modified cam member 37 having pins 38. A third pin 60 is provided to engage the recess 32. Rotation of the cam member 31 therefore causes the linear movement of the slide member 21. The lock 10 of Figures 2 and 3 includes a lock member 40 that is engageable 10 within a recess 41 of the cam member 37 to prevent rotation of the cam member 37 and therefore prevent movement of the slide member 21 by operation of the cam member 37. The lock member 40 is received within a recess 39 of the base 15, with the recess 39 having an end wall 43. A spring 42 is located between the wall 43 and the member 40, to urge the member 40 into engagement with the cam member 37. The member 40 has a is projection 57 that is received within the recess 41 when the recess 41 is aligned therewith. The member 40 is moved radially relative to the axis 52, that is generally normal to the axes 18. In that respect a plane passing through the axes 18 intersects with the member 40. The member 40 also has a cam follower projection 58. The lock 10 of Figures 2 and 3 includes a second cam member 44. The second 20 cam member 44 has a shaft 45 that projects through a central aperture 46 of the member 37 so as to be supported thereby for angular movement about the axis 52. The cam member 44 has a cam portion 47 that engages a projection 58 to cause movement of the member 40 from engagement within the recess 41. The cam portion 47 has an indent within which the projection 58 is located when the member 40 is disengaged from the 25 cam member 37. The pins 38 engages a lateral projection 59 of the cam member 44. When the cam member 44 is moved angularly about the axis 52, the projection 59 engages one of the pins 38 to cause angular movement of the cam member 37 about the axis 52, and therefore movement of the slide member 21 due to movement of the pin 60. There is also 30 lost motion between the lateral projection 59 and the pins 58.

6 Accordingly, in operation of the cam members 37 and 44, angular movement of the cam member 44 will move the member 40 from engagement within the recess 41, so that further angular movement of the cam 39 is permitted. When the member 40 is not aligned with the slot 41, the cam 37 is free for further movement. Accordingly angular 5 movement of the cam 44 will cause angular movement of the cam 37 and therefore movement of the member 21 due to engagement of the pins 60 within the recess 32. A lock cylinder 48 is located in.a central aperture 49 of the handle 11, with the lock cylinder 48 engaged within the cam member 44 so that upon operation of a key by a user, the lock cylinder 48 can be used to cause movement of the slide member 21. 10 In this embodiment, a lock cylinder such as the lock cylinder 48, would also be located on the "outside" of the door so that again by manipulation thereof the further lock cylinder could be used to cause movement of the cam member 44, and thus the member 21. In respect of the abovementioned lock 10, the two lock cylinders provided, is would have "lost motion" in respect of their angular movement so that the slide member 21 can be manipulated by a user gripping the portion 50 that projects laterally from the slide member 21 through the aperture 55 of the lock handle 11. The cylinder 48 projects through an aperture 56 in the base 36. Both mentioned cylinders move angularly about the axis 52, as do the cam 20 members 37 and 44.

Claims

1. A lock to engage a striker, the lock including: a base; a pair of lock tongues each pivotally mounted on the base for angular movement about a respective pivot axis, with the axes being generally parallel and the tongues moved in angularly opposite directions between an extended striker engaging position, and a retracted position at which the tongues would be disengaged from the striker; a single slide member mounted on the base and guided for linear movement between a first position and a second position, and engaged with the tongues to cause movement thereof between the extended and retracted positions, with the first position of the slide member corresponding to the extended position of the tongues, and the second position corresponding to the retracted position of the tongues; and a user manipulated portion operatively associated with the slide member and manipulated by a user to cause movement of the slide member between the first and second positions, the lock further including a first key operated lock cylinder that is turned about a longitudinal axis by operation of a key, and a first cam member having an axis about which the cam member is angularly moved, the cam member axis being coincident with the longitudinal axis of the cylinder, with the longitudinal axis being generally parallel to the tongue axes, wherein said first cam member comprises a circular disc having a pin for operative association with said slide member so that upon angular movement of the cylinder about the longitudinal axis, said slide member is caused to move between the first and second positions thereof.

2. The lock of claim 1, wherein each tongue has a slot extending at least partly radially relative to the axis of the respective tongue, and said slide member has two projections, each projection being located in a respective one of the slots so as to be slidably located therein.

3. The lock of claim 1 or claim 2, wherein said lock includes a handle with an aperture through which said portion projects so that it can be gripped by a user to manipulate the slide member to move the slide member between the first and second positions thereof 8

4. The lock of any one of claims I to 3, wherein said portion projects from said slide member at least partly in a direction parallel to the tongue axes.

5. The lock of claim 1, wherein said lock includes a second key operated lock cylinder, with said lock including a second cam member, said second cam member being engaged by the second cylinder, with the second cam and second cylinder having a longitudinal axis coincident with the axis of the first lock cylinder and first cam member, and wherein said second cam member is moved angularly by said first cam member about the longitudinal axis thereof to cause movement of the first cam member which in turn causes movement of the slide member between the first and second positions thereof.

6. The lock of claim 1, wherein said slide member has a recess, and said first cam member a projection located in said recess so that said first cam member causes movement of the slide member between the first and second positions thereof

7. The lock of claim 5, wherein said portion is attached to said slide and projects laterally therefrom.

8. The lock of claim 5, 6 or 7, further including a locking member operatively associated with the first cam member to engage the first cam member to retain the first cam member in a predetermined position, and said second cam upon angular movement to cause movement of the first cam moves the locking member from engagement with the first cam member to provide for movement of the first cam member.

9. The lock of claim 8, further including a spring urging the locking member into engagement with the first cam.

10. A lock, substantially as hereinbefore described with reference to the accompanying drawings. Azuma Design Pty Limited Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON