Latch bolt installation structure and door lock using such structure

1. A latch bolt installation structure, comprising:

a latch bolt body having a driving part and a latch part, wherein the latch part is detachably connected with the driving part,

the latch part having a male part insertable into a female part on the driving part, and having a first installation position and a second installation position;

when the latch part is installed in the first installation position, a flat surface of the latch part faces towards a first direction;

when the latch part is installed in the second installation position, the flat surface of the latch part faces towards a second direction which is opposite to the first direction; and

an elastic mechanism in the driving part linearly movable in a first linear direction for engaging with the male part to retain the male part in the female part and linearly movable in an opposite linear direction to disengage the male part whereafter the male part is detachable from the female part.

2. The latch bolt installation structure of claim 1 , wherein the elastic mechanism comprises an engaging block movable by a linear elastic force to engage with the male part by inserting into a recess on the male part.

3. The latch bolt installation structure of claim 2 , wherein a moving direction of the engaging block under the elastic force is perpendicular to a moving direction of the male part inserting into the driving part.

4. The latch bolt installation structure of claim 2 , wherein an adjusting mechanism is further provided in the driving part, for cooperating with the elastic mechanism, wherein the adjusting mechanism moves the engaging block against the elastic force to release the male part, allowing the latch part to be detached.

5. The latch bolt installation structure of claim 4 , the adjusting mechanism comprises an adjusting channel in the driving part adapted for receiving an external feature or tool, a contacting portion configured in the engaging block for contacting with the external feature or tool, wherein the external feature or tool reaches to the contacting portion through the adjusting channel; and a height adjustment range by the external feature or tool is no less than the insertion depth of the engaging block in the recess.

6. The latch bolt installation structure of claim 1 , wherein the cross-section of the male part is in the shape of one of circle, oval, or polygon.

7. The latch bolt installation structure of claim 6 , wherein the male part is a cylindrical structure on the latch part, and a limit stop is provided at the side of the latch part where the male part is arranged, and a corresponding limit groove is provided at the driving part for receiving the limit stop.

8. The latch bolt installation structure of claim 1 , wherein the male part has a guiding surface for smoothly inserting into the female part.

9. The latch bolt installation structure of claim 8 wherein the guiding surface is a beveled end on the male part.

10. The latch bolt installation structure of claim 1 wherein the male part moves horizontally and the elastic mechanism moves vertically to lock and unlock the male part in the female part.

11. A door lock, comprising:

a lock body;

a latch extendable from and retractable into the lock body in opposite linear directions, and having a male member and a female member;

the male member mating with the female member for selective rotational positioning of the male member in opposite forward and rearward directions relative to the female member; and

an engaging member linearly movable in first linear direction to an extended position engaging the male member to retain the male member in the female member and linearly movable in an opposite linear direction to a retracted position disengaging the male member after which the male member is removable from the female member.

12. The door lock of claim 11 further comprising a linear acting spring to bias the engaging member toward the extended position engagement with the male member.

13. The door lock of claim 11 wherein the male member includes a recess into which the engaging member extends.

14. The door lock of claim 11 wherein the latch includes a channel for receiving a tool to disengage the engaging member from the male member.

15. The door lock of claim 14 wherein the lock body has a hole for the tool to reach the channel.

16. The door lock of claim 11 a limit stop on the male member and a limit groove on the female member to receive the limit stop and align the male member in the selected forward and rearward positions.

17. The door lock of claim 11 wherein the male member has a beveled end for guidance into the female member.

18. The door lock of claim 11 wherein the latch moves in a horizontal direction and the engaging member moves in a vertical direction.

19. The door lock of claim 11 wherein the male member includes a post with a groove for receiving the engaging member.

20. The door lock of claim 11 wherein one of the male and female member has a limit groove and the other of the male and female members has a limit stop, wherein the limit groove and limit stop engage one another to hold the male member in the forward and rearward directions.