NZ742021B2 - A lock set for sliding doors - Google Patents

Abstract

lock set, comprising a housing for mounting on a sliding door; a strike for mounting on a door frame or an adjacent sliding door, the strike comprises a chamber having an opening; a bolt comprising formations located at or about a distal end of the bolt for rotationally engaging complementary locking formations of the strike, the bolt being configured to be moveable between: a retracted state in which the bolt is substantially located within the housing, an extended state in which the bolt protrudes from the housing for advancing into the strike, and a locking state in which the bolt is rotated for lockingly engaging the complementary locking formations of the strike; and a driving mechanism configured for operating the bolt between the retracted state, the extended state and the locking state. The driving mechanism comprises a first driver - for actuating the bolt between the retracted state and the extended state, and a second driver - for rotational motion between the extended state and the locking state, both mounted to a common axle shaft of the housing so their respective actuation of the bolt is synchronised. The formations of the bolt comprise grooves that are configured substantially in the shape of an ‘L’ for engaging complementary projections within the strike chamber. The dual mechanism drivers provide a more controlled and precise manipulation of the bolt and improved security via the engagement of the bolt with the strike being more tamperproof compared to the prior art.

Claims (14)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A lock set, comprising: a housing for mounting on a sliding door; 5 a strike for mounting on a door frame or an adjacent sliding door, the strike comprises a chamber having an opening; a bolt comprising formations located at or about a distal end of the bolt for rotationally engaging complementary locking formations of the strike, the bolt being configured to be moveable between: a retracted state in which the bolt is substantially located 10 within the housing, an extended state in which the bolt protrudes from the housing for advancing into the strike, and a locking state in which the bolt is rotated for lockingly engaging the complementary locking formations of the strike; and a driving mechanism configured for operating the bolt between the retracted state, the extended state and the locking state, 15 wherein the driving mechanism comprises: a first driver for actuating the bolt between the retracted state and the extended state, the first driver comprising a cam operatively associated with a carriage, which is operatively coupled to the bolt, such that relative movement of the cam about a pivot causes linear movement of the carriage, wherein the carriage comprises a formation for operatively 20 coupling with a complementary formation of the bolt whereby the bolt is moveable while coupled to the carriage in both linear and radial directions of travel, and a second driver for rotating the bolt between the extended state and the locking state, the second driver comprising an arm rotatable in an axis perpendicular to a longitudinal axis of the bolt; 25 wherein the first and second drivers are mounted to a common axle shaft of the housing so their respective actuation of the bolt are synchronised, and wherein the formations of the bolt comprise grooves configured substantially in the shape of an "L" for engaging complementary projections located within the strike chamber. 30

2. A lock set according to claim 1, wherein the carriage comprises a projection that is received within a recess of the bolt, and a further projection protruding transversely from the projection receivable within a complementary slot formation located within the recess of the bolt.

3. A lock set according to claim 1 or 2, wherein the bolt comprises a projection that is received within a recess of the carriage, and a further projection protruding transversely from the projection receivable within a complementary slot formation located within the recess of 5 the carriage.

4. A lock set according to claim 3, wherein the cam is located within and associated with the carriage by way of its protrusion into an opening of the carriage. 10

5. A lock set according to any one of claims 1 to 4, wherein the arm comprises a formation located at or near a distal end for engaging a complementary formation located along a length of the bolt when the bolt is in the extended state, whereby rotational movement of the arm when coupled to the bolt actuates the bolt between the extended state and the locking state.

6. A lock set according to claim 5, wherein the formation on the arm is a projection for operatively coupling with a complementarily shaped detent located along the length of the bolt. 20

7. A lock set according to any one of claims 1 to 6, wherein the drivers are operable by way of rotational movement of a lock handle or a lock gear associated with the axle shaft.

8. A lock set according to claim 7 when dependent on any one of claims 1 to 4, wherein the cam is mounted to the axle shaft so that the cam is operable by way of rotational 25 movement of the lock handle or the lock gear associated with the axle shaft.

9. A lock set according to claim 8, wherein the arm is mounted to the axle shaft so that the arm is operable by way of rotational movement of the lock gear associated with the axle shaft or by way of manual handling by a user.

10. A lock set according to any one of claims 7 to 9, wherein the axle shaft is of a substantially rectangular cross section.

11. A lock set according to any one of claims 7 to 10, wherein the lock gear is associated with and operable by a keyed lock.

12. A lock set according to any one of the preceding claims, wherein the bolt comprises 5 a formation configured to engage a complementary guiding formation of the housing so that movement of the bolt is restrained by its engagement with the complementary guiding formation.

13. A lock set according to claim 12, wherein the formation of the bolt is a projection 10 configured to engage a complementary radial track of the housing when the bolt is in the extended state, whereby the projection of the formation of the bolt abuts an end of the radial track to limit rotational movement of the bolt.

14. A lock set according to claim 13, wherein the projection of the formation of the bolt 15 is configured to engage a complementary linear track, whereby the projection of the formation of the bolt abuts an end of the linear track to limit rectilinear movement of the bolt.