Cabinet door lock

Abstract

The utility model relates to a cabinet door lock, which comprises a lock body, a mounting nut for fastening and mounting the lock body on a cabinet door, a lock cylinder arranged in the lock body and a spring bolt connected with the rear end of the lock cylinder, a lock hole for a key to insert is arranged at the front end of the lock cylinder, and at least two lock head blocks capable of entering and exiting the lock hole of the cabinet body are arranged on the periphery of the spring bolt. The lock cylinder drives the spring bolt to rotate for locking or unlocking, the spring bolt can slide back and forth relative to the lock body, an elastic piece for providing forward sliding driving force for the spring bolt is further arranged, the front end of the lock head block is provided with a positioning face, the side edge of the lock head block is further provided with a guide face, the guide face extends to the positioning face from back to front in an arc mode, and the spring bolt rotates. The guide face abuts against the inner wall of the lock hole to drive the lock head block to move backwards, and the positioning face and the inner side of the cabinet body are locked in a matched mode. Due to the arrangement of the elastic piece, the cabinet door is relatively and backwards tensioned on the cabinet body, and the cabinet door and the cabinet body are tightly attached.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a cabinet door lock. Background Art

[0002] As the name implies, a door lock is a device used to lock a door to prevent others from opening the door. CN211500106U proposes a new cabinet door lock, including a lock body installed on the cabinet door, a mounting nut installed in cooperation with the lock body, a lock core arranged in the lock body, a lock tongue connected to the lock core, and a key for inserting the lock body to rotate the lock core. A limit pin is provided in the lock core, and the limit pin passes through the lock core to form a limit block. The lock body is provided with an arc groove for the limit block to reciprocate. An arc step is provided at one end of the arc groove. The end of the arc groove corresponding to the arc step forms a limit end to prevent the limit block from escaping. When the lock core is in a locked state, the limit block enters the limit end. There is a lock hole for the lock tongue to pass through on the cabinet body. The lock tongue is generally a straight lock head. After it passes through the lock hole, the lock tongue is driven by the lock core to rotate, so that the straight lock head is staggered or corresponds to the lock hole, thereby realizing the locking or unlocking of the cabinet door. However, this structure has no door tensioning structure after the cabinet door is locked, so that there is a gap between the locked cabinet door and the cabinet body, resulting in looseness. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a cabinet door lock. Due to the provision of the elastic member, the cabinet door is relatively pulled backwards onto the cabinet body, and the two are tightly fitted.

[0004] The technical solution of the utility model is as follows: a cabinet door lock comprises a lock body, a mounting nut for fastening the lock body to the cabinet door, a lock core arranged in the lock body and a lock tongue connected to the rear end of the lock core, a keyhole for inserting a key is provided on the front end of the lock core, at least two lock head blocks which can enter and exit the lock hole of the cabinet are provided on the outer periphery of the lock tongue, the lock tongue is driven by the lock core to rotate to lock or unlock, the lock tongue can also be slidably arranged forward and backward relative to the lock body, an elastic member which gives the lock tongue a driving force to slide forward is also provided, the front end of the lock head block has a positioning surface, and the side of the lock head block also has a guide surface, the guide surface extends in an arc shape from the back to the front to the positioning surface, the lock tongue rotates, and the guide surface abuts against the inner wall of the lock hole to drive the lock head block to move backward, so that the positioning surface and the inner side of the cabinet are locked in coordination.

[0005] By adopting the above technical solution, when closing the door, the lock tongue is inserted into the lock hole of the cabinet body, and the rear end of the guide surface of the lock block corresponds to the lock hole. Then the key is inserted into the keyhole of the lock core, and the lock core is driven to rotate to lock, thereby driving the lock tongue to rotate, and the guide surface of the lock block rotates against the inner wall of the lock hole. The guide surface contacts and slides with the inner wall of the lock hole, so that the lock tongue rotates and moves backward, and the lock block also rotates to stagger the lock hole, and its front end positioning surface cooperates and locks with the inner side of the cabinet body, thereby realizing locking the cabinet door; and due to the setting of the elastic member, the lock block can be pulled forward on the inner side of the cabinet body, so that the cabinet door is relatively pulled backward on the cabinet body, and the two are tightly fitted.

[0006] The utility model is further configured as follows: a convex block is provided on the inner wall of the lock body, and an arc-shaped groove is provided on the circumference of the lock core; the convex block is located in the arc-shaped groove and can slide relative to the arc-shaped groove.

[0007] With the above further configuration, the projection slides in the arc groove, thereby limiting the rotation angle of the lock core.

[0008] The utility model is further configured as follows: a square hole is provided on the front end of the lock tongue, an assembly block which fits into the square hole is provided on the rear end of the lock core, and the lock tongue and the lock core are further connected by screws.

[0009] With the above further arrangement, the assembly block is firstly engaged with the square hole for positioning, and then fixed by screws, so as to facilitate the installation and connection of the lock tongue and the lock core.

[0010] The utility model is further configured as follows: a boss A is provided on the inner wall of the lock body, a boss B is provided on the outer wall of the lock core, the boss B is located in front of the boss A, and the elastic member is a spring and is disposed between the front and rear bosses.

[0011] By further adopting the above arrangement, the spring is lowered between the two bosses, thereby providing a driving force for the lock cylinder to slide forward.

[0012] The utility model is further configured as follows: the rear end of the lock body has a mounting portion for entering and exiting the cabinet door mounting hole, the front end of the mounting portion is provided with a buttress, the mounting nut is spirally sleeved on the mounting portion and cooperates with the buttress to clamp the cabinet door, and the outer periphery of the mounting portion is provided with a locking block that is clamped on the mounting hole.

[0013] With the above further arrangement, the mounting portion of the lock body is first inserted backward into the mounting hole of the cabinet door, and is positioned on the mounting hole by means of a locking block on the mounting portion, thereby preventing the lock body from rotating relative to the cabinet door. Thereafter, the mounting nut is screwed on and the cabinet door can be clamped by means of the mounting nut cooperating with the abutment.

[0014] The utility model is further configured as follows: a handle plate is provided at the front end of the lock body, and after the lock body is installed on the cabinet door, the handle plate is also spaced apart in front of the cabinet door.

[0015] With the above further arrangement, the handle plate can function as a door handle, and when opening the door, the handle plate is held to open the door outwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0017] Figure 2 It is an internal structure diagram of a specific embodiment of the utility model;

[0018] Figure 3 It is an exploded view of a specific embodiment of the utility model;

[0019] Figure 4 This is a structural diagram of a lock body in a specific embodiment of the utility model;

[0020] Figure 5 This is a structural diagram of a lock core in a specific embodiment of the utility model;

[0021] Figure 6 It is a structural diagram of the lock tongue in a specific embodiment of the utility model;

[0022] Figure 7 This is a structural diagram of the cabinet door lock installation in a specific embodiment of the utility model.

[0023] In the figure: lock body 1, mounting nut 2, lock core 3, lock tongue 4, lock head block 41, elastic member 5, positioning surface 411, guide surface 412, protrusion 11, arc groove 31, square hole 42, assembly block 32, screw 6, boss A12, boss B33, mounting portion 13, stop 14, positioning block 131, handle plate 15. DETAILED DESCRIPTION

[0024] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-7As shown, a cabinet door lock of the utility model comprises a lock body 1, a mounting nut 2 for fastening the lock body to the cabinet door, a lock core 3 arranged in the lock body, and a lock tongue 4 connected to the rear end of the lock core, wherein the rear end of the lock body 1 has a mounting portion 13 for entering and exiting the cabinet door mounting hole, a stopper 14 is provided at the front end of the mounting portion 13, and the mounting portion 13 has an external thread, the mounting nut 2 is spirally sleeved on the mounting portion 13, and cooperates with the stopper 14 to clamp the cabinet door, and a clamping block 131 clamped on the mounting hole is provided on the outer periphery of the mounting portion 13, and the clamping block 131 is a square block;

[0026] A keyhole for inserting a key is provided on the front end of the lock core 3, and at least two lock blocks 41 are provided on the outer periphery of the lock tongue 4, which can enter and exit the lock hole of the cabinet. The lock hole of the cabinet is generally in a straight line shape, and the lock core 3 drives the lock tongue 4 to rotate to lock or unlock. The lock tongue 4 can also be slidably arranged forward and backward relative to the lock body 1, and an elastic member 5 is provided to give the lock tongue 4 a driving force to slide forward. A boss A12 is integrally provided on the inner wall of the lock body 1, and a boss B33 is integrally provided on the outer wall of the lock core 3. The boss B33 is located in front of the boss A12. The elastic member 5 is a spring and is arranged between the front and rear bosses. The elastic member 5 can also be a tension spring;

[0027] The front end of the lock block 41 has a positioning surface 411, and the side of the lock block 41 also has a guide surface 412. The guide surface 412 extends from the back to the front to the positioning surface 411 in an arc shape. When the lock tongue 4 rotates, the lock block 41 can be driven to move backward by the guide surface 412 against the inner wall of the lock hole, so that the positioning surface 411 is locked with the inner side of the cabinet. The inner wall of the lock body 1 is integrally provided with a protrusion 11, and an arc groove 31 is provided in the circumferential direction of the lock core 3. The arc groove 31 is generally 90°. The protrusion 11 is located in the arc groove 31 and can slide relative to the arc groove 31. The front end of the lock tongue 4 has a square hole 42, and the rear end of the lock core 3 has an assembly block 32 that fits into the square hole 42. The lock tongue 4 and the lock core 3 are also connected by screws 6. The rear end of the lock tongue 4 also has a threaded hole for the screw 6 to be installed.

[0028] The front end of the lock body 1 is also provided with a handle plate 15. After the lock body is installed on the cabinet door, the handle plate 15 is also arranged in front of the cabinet door at intervals. The handle plate 15 can act as a door handle. When opening the door, hold the handle plate to open the door outward. The handle plate 15 can be oval, square, or straight. The handle plate 15 is arranged in front of the platform 14.

[0029] The lock is installed on the cabinet door and tightened by installing the nut. When closing the door, the lock tongue 4 will be inserted into the lock hole of the cabinet body, and the rear end of the guide surface 412 of the lock head block 41 will correspond to the lock hole. Then the key is inserted into the keyhole of the lock core 3, and the lock core 3 is driven to rotate to lock, thereby driving the lock tongue 4 to rotate, and the guide surface 412 of the lock head block 41 rotates against the inner wall of the lock hole, and the guide surface 412 slides in contact with the inner wall of the lock hole, so that the lock tongue 4 rotates and moves backward, and the lock head block 41 also rotates to stagger the lock hole, and its front end positioning surface 411 cooperates and locks with the inner side of the cabinet body, thereby locking the cabinet door; and due to the setting of the elastic member 5, the lock head block 41 can be pulled forward on the inner side of the cabinet body, so that the cabinet door is relatively pulled backward on the cabinet body, and the two fit tightly.

[0030] By rotating the lock core 3 in the reverse direction, the lock tongue 4 can be driven to rotate, and the lock head block 41 can rotate back to correspond to the lock hole. At this time, the lock tongue 4 can move forward to disengage from the lock hole and unlock.

[0031] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, descriptions such as "A", "B", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "couple", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A cabinet door lock, comprising a lock body (1), a mounting nut (2) for fastening the lock body to the cabinet door, a lock core (3) arranged in the lock body, and a lock tongue (4) connected to the rear end of the lock core, the lock core (3) having a keyhole for inserting a key on the front end, the lock tongue (4) having at least two lock blocks (41) on the outer periphery that can enter and exit the cabinet lock hole, the lock core (3) driving the lock tongue (4) to rotate to lock or unlock, characterized in that: The lock tongue (4) can also be arranged to slide forward and backward relative to the lock body (1), and is further provided with an elastic member (5) for giving the lock tongue (4) a driving force to slide forward. The front end of the lock head block (41) has a positioning surface (411), and the side of the lock head block (41) also has a guide surface (412). The guide surface (412) extends from the back to the front in an arc shape to the positioning surface (411). When the lock tongue (4) rotates, the guide surface (412) abuts against the inner wall of the lock hole, which can drive the lock head block (41) to move backward, thereby achieving the positioning surface (411) and the inner side of the cabinet body to lock.

2. The cabinet door lock according to claim 1, characterized in that: The lock body (1) has a protrusion (11) on its inner wall, and an arc-shaped groove (31) is provided in the circumferential direction of the lock core (3). The protrusion (11) is located in the arc-shaped groove (31) and can slide relative to the arc-shaped groove (31).

3. The cabinet door lock according to claim 1, characterized in that: The front end of the lock tongue (4) is provided with a square hole (42), the rear end of the lock core (3) is provided with an assembly block (32) that fits into the square hole (42), and the lock tongue (4) and the lock core (3) are also connected by means of screws (6).

4. The cabinet door lock according to claim 1, 2 or 3, characterized in that: The lock body (1) has a boss A (12) on its inner wall, the lock core (3) has a boss B (33) on its outer wall, the boss B (33) is located in front of the boss A (12), and the elastic member (5) is a spring and is disposed between the front and rear bosses.

5. The cabinet door lock according to claim 1, 2 or 3, characterized in that: The rear end of the lock body (1) has a mounting portion (13) for entering and exiting a cabinet door mounting hole, and a stopper (14) is provided at the front end of the mounting portion (13). The mounting nut (2) is screwed onto the mounting portion (13) and cooperates with the stopper (14) to clamp the cabinet door. A locking block (131) is provided on the outer periphery of the mounting portion (13) and is locked onto the mounting hole.

6. The cabinet door lock according to claim 1, 2 or 3, characterized in that: A handle plate (15) is provided at the front end of the lock body (1); after the lock body is mounted on the cabinet door, the handle plate (15) is also arranged at a distance in front of the cabinet door.

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