A door lock

Abstract

The present application discloses a door lock, which relates to the technical field of locks, and includes components such as a lock seat, a lock core sleeve, a lock sleeve, a rotating shaft, a lock tongue, an outer shaft sleeve, and an elastic member. The present invention adopts a pin shaft and a guide hole design, and controls the locking and unlocking states of the lock tongue by moving the pin shaft in the guide hole, thereby reducing the friction resistance of the lock tongue when rotating in the traditional door lock and prolonging the service life of the door lock.

Description

Technical Field

[0001] The present application relates to the technical field of locks, and in particular to a door lock. Background Art

[0002] Currently, the most common door lock is a mechanical lock that is opened and closed by rotating the lock tongue. It uses a set of spring-loaded pins to prevent the rotation of the lock tongue. Only when the correct key is inserted and pushes the pins to the correct position can the lock tongue move freely to open and close the lock.

[0003] It mainly includes a lock seat, a lock core installed in the lock seat, a lock shaft controlled by the lock core, and a lock tongue fixedly connected to the lock shaft. When in use, the key is inserted into the lock core, the control pin is pushed to the correct position, and the lock tongue can move freely, thereby realizing the opening or closing of the door lock.

[0004] When the existing door lock is in use, the lock tongue is pressed against the door frame by rotating the lock tongue. However, when the lock tongue is rotated into the door frame, the friction resistance is large, which can easily damage the lock tongue and shorten the service life of the door lock. Utility Model Content

[0005] In order to improve the problem of large friction resistance during the locking process of the lock tongue, the present application provides a door lock.

[0006] The present application provides a door lock, which adopts the following technical solution:

[0007] A door lock, comprising:

[0008] Lock seat;

[0009] A lock cylinder sleeve is installed in the lock seat, and a pin lock cylinder is arranged in the lock cylinder sleeve;

[0010] A lock sleeve is rotatably connected to the lock seat and fixedly connected to the lock core sleeve, and an inner sleeve is coaxially fixed to one end of the lock sleeve away from the lock core;

[0011] A rotating shaft, slidably connected in the shaft sleeve;

[0012] A lock tongue is fixedly connected to one end of the rotating shaft extending out of the lock seat;

[0013] An outer sleeve is installed in the lock seat and sleeves the inner sleeve therein;

[0014] An elastic member, installed in the inner sleeve, to provide elastic force for the rotating shaft to move toward the outside of the inner sleeve;

[0015] The lock sleeve is provided with an opening for the pin of the pin lock cylinder to extend out, and the inner wall of the lock seat is provided with a locking groove for the pin to be inserted and locked; the outer wall of the inner sleeve is provided with a guide hole extending obliquely around the axis of the inner sleeve, a pin extending in a direction perpendicular to the axis of the shaft is fixed on the rotating shaft, and an axial through groove for the pin to extend out is provided on the outer sleeve; one end of the pin extends out of the guide hole and the axial through groove in sequence, and the pin moves along the trajectory of the guide hole; the outer sleeve is provided with a limited opening, and the inner wall of the lock seat is fixed with a limit block that is inserted into the limited opening to prevent the outer sleeve from rotating; a gap is left between the outer sleeve and the bottom of the lock seat, and the gap forms a circumferential groove for the pin to rotate circumferentially; when the rotating shaft is retracted inwardly to one end of the pin located in the guide hole, the pin is located in the groove bottom of the axial through groove, and the lock tongue is in a locked state; when the rotating shaft slides outwardly to the other end of the pin located in the guide hole, the pin enters the circumferential groove, and the lock tongue is in an unlocked state.

[0016] By adopting the above technical solution, when locking, first unlock the pin lock cylinder, rotate the lock cylinder sleeve, so that the pin shaft moves from the end of the circumferential groove to the notch of the axial through groove. At this time, the lock tongue follows the rotating shaft to the position aligned with the door frame, and continue to rotate the lock cylinder sleeve. The pin shaft moves toward the axial through groove. At this time, the lock tongue is pressed toward the direction of the door frame, thereby completing the locking of the lock tongue. The locking process adopts the method of first aligning and then squeezing. The friction between the door frame and the lock is small during the process, which increases the service life of the lock.

[0017] Optionally, the elastic member includes a spring installed in the inner sleeve, one end of the spring abuts against the rotating shaft, and the other end of the spring abuts against the locking sleeve.

[0018] Optionally, a boss is provided at one end of the rotating shaft away from the locking sleeve, and the locking tongue is sleeved on the boss and fixed on the boss by bolts.

[0019] By adopting the above technical solution, the lock tongue is connected to the rotating shaft through the bolt, thereby realizing a detachable connection between the two, which is convenient for replacement.

[0020] Optionally, the rotating shaft is provided with a through hole for a pin to pass through, and the pin is rotatably connected in the through hole.

[0021] By adopting the above technical solution, a detachable connection between the rotating shaft and the pin shaft is achieved, and installation is more convenient.

[0022] Optionally, a connecting shaft is passed through the lock core sleeve, and a connecting hole for the connecting shaft to be inserted is opened on the lock sleeve. The connecting shaft passes through the lock sleeve and the lock core sleeve in sequence to form a fixed connection between the lock core sleeve and the lock sleeve.

[0023] By adopting the above technical solution, a detachable connection between the lock core sleeve and the lock sleeve is achieved, and installation is more convenient.

[0024] Optionally, a knob handle is fixed to one end of the lock core sleeve away from the inner sleeve.

[0025] By adopting the above technical solution, it is convenient for an operator to rotate the lock cylinder sleeve.

[0026] Optionally, the lock seat includes a base and a connecting handle, and the connecting handle is provided with a countersunk hole for the screw to pass through.

[0027] Optionally, the lock seat includes a base and a connecting platform, the connecting platform includes a downward groove, and the knob handle is located in the groove.

[0028] Optionally, a sealing ring is sleeved on one end of the inner sleeve close to the locking sleeve.

[0029] In summary, the present application includes at least one of the following beneficial effects:

[0030] Since the present invention adopts the pin shaft and guide hole design, the locking and unlocking states of the lock tongue are controlled by the movement of the pin shaft in the guide hole, thereby reducing the friction resistance of the lock tongue when rotating in the traditional door lock and increasing the service life of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application;

[0032] Figure 2 is an exploded schematic diagram of an embodiment of the present application;

[0033] Figure 3 is a cross-sectional schematic diagram of a lock seat according to an embodiment of the present application;

[0034] Figure 4 is a cross-sectional schematic diagram of an embodiment of the present application;

[0035] Figure 5 is a cross-sectional schematic diagram of a circumferential groove in an embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of the structure of the lock seat in other embodiments.

[0037] Description of reference numerals: 1, lock seat; 11, base; 12, connecting handle; 121, countersunk hole; 13, connecting platform; 131, groove; 14, locking groove; 15, limit block;

[0038] 1. Lock cylinder sleeve; 21. Pin lock cylinder; 211. Pin; 212. Return spring; 213. Eccentric shift block; 22. Knob handle;

[0039] 2. Lock sleeve; 31. Inner sleeve; 311. Guide hole; 312. Limit ring; 32. Opening;

[0040] 3. Rotating shaft; 41. Pin; 42. Boss;

[0041] 4. Lock tongue; 51. Mounting hole;

[0042] 5. Outer sleeve; 61. Axial through groove; 62. Limiting opening;

[0043] 6. Elastic parts;

[0044] 7. Connecting shaft;

[0045] 8. Circumferential groove;

[0046] 9. Sealing ring. DETAILED DESCRIPTION

[0047] The present application is further described in detail below in conjunction with the accompanying drawings.

[0048] The present application embodiment discloses a door lock. Figure 1 , 2 The door lock comprises a lock seat 1, a lock core sleeve 2, a lock sleeve 3, a rotating shaft 4, a lock tongue 5, an outer shaft sleeve 6 and an elastic member 7. The lock core sleeve 2 is installed in the lock seat 1, a pin lock core 21 is installed in the lock core sleeve 2, and a knob handle 22 is fixed to one end of the lock core sleeve 2 extending out of the lock seat 1 for user convenience.

[0049] Reference Figure 2 The lock sleeve 3 is rotatably connected in the lock seat 1. A connecting shaft 8 is provided between the lock sleeve 3 and the lock cylinder sleeve 2. A connecting hole for the connecting shaft 8 to be inserted is provided on the lock sleeve 3. The connecting shaft 8 passes through the lock sleeve 3 and the lock cylinder sleeve 2 in sequence. The lock sleeve 3 and the lock cylinder sleeve 2 are fixedly connected by the connecting shaft 8. The lock sleeve 3 is provided with an opening 32 for the pin 211 of the pin lock cylinder 21 to extend out.

[0050] Reference Figure 3 , 4 The pin 211 is slidably connected in the inner core hole of the pin lock core 21, and is provided with a power for extension by a return spring 212 in the inner core hole. An eccentric shifting block 213 is connected to the end of the pin lock core 21 away from the key hole, and the pin 211 is provided with an adjustment hole for the eccentric shifting block 213 to extend. The pin lock core 21 drives the pin 211 to extend and retract by rotating the eccentric shifting block 213. Since the pin lock core 21 is a prior art, it will not be described in detail in this embodiment.

[0051] Reference Figure 3 , 4 A locking groove 14 for the pin 211 to be inserted and locked is provided on the inner wall of the lock seat 1. When the pin 211 is inserted into the locking groove 14, the locking of the lock tongue 5 can be achieved.

[0052] Reference Figure 2 , 4, an inner sleeve 31 is coaxially fixed to one end of the lock sleeve 3 away from the lock core. The rotating shaft 4 is slidably connected in the inner sleeve 31, and the lock tongue 5 is fixedly connected to the end of the rotating shaft 4 extending out of the lock seat 1. The outer sleeve 6 is installed in the lock seat 1, and the inner sleeve 31 is sleeved therein. The elastic member 7 is installed in the inner sleeve 31 to provide elastic force for the rotating shaft 4 to move toward the outside of the inner sleeve 31. In this embodiment, the elastic member 7 includes a spring installed in the inner sleeve 31. One end of the spring is against the rotating shaft 4, and the other end is against the lock sleeve 3. In the absence of external force, the spring always provides power for the rotating shaft 4 to slide outward. In other embodiments, the elastic member 7 can also be made of a material with elastic deformation such as an elastic sponge.

[0053] Reference Figure 2 , 4 The outer wall of the inner sleeve 31 is provided with a guide hole 311 extending obliquely around the axis of the inner sleeve 31, and a pin 41 is passed through the end of the rotating shaft 4 away from the locking tongue 5, and the axis of the pin 41 intersects perpendicularly with the axis of the rotating shaft 4. The outer sleeve 6 is provided with an axial through groove 61 for the pin 41 to extend out, and the end of the pin 41 extends into the guide hole 311 and the axial through groove 61 in turn, and the pin 41 moves along the track of the guide hole 311. In this embodiment, two guide holes 311 and two axial through grooves 61 are provided, and they are symmetrically arranged around the axis of the rotating shaft 4. Of course, the number of guide holes 311 and axial through grooves 61 can be set according to the actual situation.

[0054] When the pin 41 is located at the end of the guide hole 311 away from the lock sleeve 3, the shaft 4 slides outward to the maximum distance; when the pin 41 is located at the end of the guide hole 311 close to the lock sleeve 3, the shaft 4 slides inward to the minimum distance.

[0055] Reference Figure 4 , 5 The outer sleeve 6 is also provided with a limiting opening 62, and a limiting block 15 is fixed on the inner wall of the lock seat 1 and is inserted into the limiting opening 62 to prevent the outer sleeve 6 from rotating. In this embodiment, for easy installation, the limiting opening 62 is communicated with the axial through groove 61, and when the limiting block 15 is inserted into the limiting opening 62, the missing part of the axial through groove 61 can be filled to form the axial through groove 61 for the pin shaft 41 to extend into.

[0056] There is a gap between the outer sleeve 6 and the bottom of the lock seat 1, which forms a circumferential groove 9 for the pin shaft 41 to rotate circumferentially, and the circumferential groove 9 is connected with the axial through groove 61. In order to keep the outer sleeve 6 in the corresponding position, the inner sleeve 31 is fixedly surrounded by a limit ring 312 near one end of the lock sleeve 3, and the outer sleeve 6 is limited between the limit ring 312 and the limit block 15.

[0057] When the shaft 4 is retracted inwards until the pin 41 is located at one end of the guide hole 311, the pin 41 is located at the bottom of the axial through groove 61, and the lock tongue 5 is in a locked state. When the shaft 4 slides outwards until the pin 41 is located at the other end of the guide hole 311, the pin 41 enters the circumferential groove 9, and the lock tongue 5 is in an unlocked state. At this time, the inner sleeve 31 is continuously rotated to make the pin 41 move toward the circumferential groove 9 and drive the lock tongue 5 to rotate in the unlocking direction.

[0058] That is, when the pin 41 of the shaft 4 moves in the axial through groove 61, the lock tongue 5 does not rotate, but follows the sliding of the shaft 4 and moves toward or away from the door frame; the lock tongue 5 rotates only when the pin 41 moves in the circumferential groove 9.

[0059] Reference Figure 2 A boss 42 is fixed to one end of the rotating shaft 4 away from the lock sleeve 3, and a mounting hole 51 adapted to the boss 42 is opened on the lock tongue 5. The lock tongue 5 is sleeved on the boss 42 through the mounting hole 51, and is locked and fixed on the boss 42 through the cooperation of bolts and gaskets. This design makes it more convenient to replace the lock tongue 5, and also improves the connection stability between the lock tongue 5 and the rotating shaft 4.

[0060] Reference Figure 2 The inner sleeve 31 is provided with a sealing ring 10 at one end close to the lock sleeve 3 to improve the sealing performance of the door lock and prevent dust and moisture from entering the interior and affecting the normal use of the door lock. Similarly, the outer periphery of the lock core sleeve 2 is also provided with a sealing ring 10 to increase the sealing performance between the lock base 1 and the inner sleeve 31.

[0061] Reference Figure 1 The lock base 1 includes a base 11 and a connecting handle 12. The connecting handle 12 is provided with a countersunk hole 121 for screws to pass through. During installation, a rubber pad can be installed on the base 11, and then the connecting handle 12 can be fixed to the carrier by screws.

[0062] In other embodiments, reference Figure 6 The lock base 1 includes a base 11 and a connecting platform 13, the connecting platform 13 includes a downward groove 131, and the knob handle 22 is located in the groove 131. Bolts are fixed to the corners of the connecting platform 13, and the lock base 1 is fixed by the cooperation of the bolts and nuts during installation.

[0063] The implementation principle of a door lock in the embodiment of the present application is:

[0064] When locking, first unlock the pin lock cylinder 21, rotate the knob handle 22 to move the pin shaft 41 from the end of the circumferential groove 9 to the notch of the axial through groove 61, and the lock tongue 5 now follows the rotating shaft 4 to the position aligned with the door frame, continue to rotate the knob handle 22, and the pin shaft 41 moves toward the axial through groove 61. At this time, the lock tongue 5 is pressed against the direction of the door frame, thereby completing the locking of the lock tongue 5. The friction force during the locking process is small, which increases the service life of the lock.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A door lock, characterized in that: include: Lock seat (1); A lock cylinder sleeve (2) is installed in the lock seat (1), and a pin lock cylinder (21) is arranged in the lock cylinder sleeve (2); A lock sleeve (3) is rotatably connected to the lock seat (1) and fixedly connected to the lock core sleeve (2); an inner shaft sleeve (31) is coaxially fixed to one end of the lock sleeve (3) away from the lock core; A rotating shaft (4) is slidably connected in the inner shaft sleeve (31); A lock tongue (5) is fixedly connected to one end of the rotating shaft (4) extending out of the lock seat (1); An outer shaft sleeve (6) is installed in the lock seat (1) and sleeves the inner shaft sleeve (31) therein; An elastic member (7) is installed in the inner shaft sleeve (31) and provides an elastic force for the rotating shaft (4) to move toward the outside of the inner shaft sleeve (31); The lock sleeve (3) is provided with an opening (32) through which a pin (211) of a pin lock cylinder (21) extends, and the inner wall of the lock seat (1) is provided with a locking groove (14) through which the pin (211) is inserted and locked; the outer wall of the inner sleeve (31) is provided with a guide hole (311) extending obliquely around the axis of the inner sleeve (31); the rotating shaft (4) is fixed with a pin (41) extending in a direction perpendicular to the axis of the rotating shaft (4); the outer sleeve (6) is provided with an axial through groove (61) through which the pin (41) extends; one end of the pin (41) extends out of the guide hole (311) and the axial through groove (61) in sequence, and the pin (41) moves along the trajectory of the guide hole (311); The outer sleeve (6) is provided with a limiting opening (62), and a limiting block (15) is fixed on the inner wall of the lock seat (1) and is inserted into the limiting opening (62) to prevent the outer sleeve (6) from rotating. A gap is left between the outer sleeve and the bottom of the lock seat (1), and the gap forms a circumferential groove (9) for the pin shaft (41) to rotate in a circumferential direction. When the rotating shaft (4) is retracted inwardly to one end where the pin shaft (41) is located in the guide hole (311), the pin shaft (41) is located in the bottom of the axial through groove (61), and the lock tongue (5) is in a locked state. When the rotating shaft (4) slides outwardly to the other end where the pin shaft (41) is located in the guide hole (311), the pin shaft (41) enters the circumferential groove (9), and the lock tongue (5) is in an unlocked state.

2. A door lock according to claim 1, characterized in that: The elastic member (7) comprises a spring installed in the inner shaft sleeve (31), one end of the spring abuts against the rotating shaft (4), and the other end of the spring abuts against the locking sleeve (3).

3. A door lock according to claim 1, characterized in that: A boss (42) is provided at one end of the rotating shaft (4) away from the locking sleeve (3), and the locking tongue (5) is sleeved on the boss (42) and fixed on the boss (42) by means of bolts.

4. A door lock according to claim 1, characterized in that: The rotating shaft (4) is provided with a through hole for the pin shaft (41) to pass through, and the pin shaft (41) is rotatably connected to the through hole.

5. A door lock according to claim 1, characterized in that: A sealing ring (10) is sleeved on one end of the inner shaft sleeve (31) close to the locking sleeve (3).

6. A door lock according to claim 1, characterized in that: The lock core sleeve (2) is provided with a connecting shaft (8), the lock sleeve (3) is provided with a connecting hole for the connecting shaft (8) to be plugged in, and the connecting shaft (8) passes through the lock sleeve (3) and the lock core sleeve (2) in sequence, thereby forming a fixed connection between the lock core sleeve (2) and the lock sleeve (3).

7. A door lock according to claim 1, characterized in that: A knob handle (22) is fixed to one end of the lock core sleeve (2) away from the inner shaft sleeve (31).

8. A door lock according to claim 1, characterized in that: The lock seat (1) comprises a base (11) and a connecting handle (12); the connecting handle (12) is provided with a countersunk hole (121) for a screw to pass through.

9. A door lock according to claim 7, characterized in that: The lock base (1) comprises a base (11) and a connecting platform (13); the connecting platform (13) comprises a downward groove (131); the knob handle (22) is located in the groove (131).

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