A type of interlocking cabinet door lock

Abstract

A linkage cabinet door lock includes a lock body and an installation structure. The lock body has a locking assembly and a limiting mechanism. The locking assembly includes a bolt, a gear locking pin, and a rack. The bolt is slidably disposed in a bolt groove. A gear locking pin is rotatably disposed on the outside of the bolt groove, with a gear at one end and a locking end at the other. The gear meshes with the rack on the bolt to achieve linkage between the bolt and the gear locking pin. The locking assembly has unlocked and locked states. In the unlocked state, a compression spring pushes the bolt out of the lock body, and the locking end screws into the lock body. In the locked state, the bolt retracts into the lock body, and the locking end screws out of the lock body. During the sliding of the bolt, the rack drives the gear locking pin to rotate, realizing the switching between the two states. The limiting mechanism includes a limiting spring and a limiting actuator. The limiting head of the limiting spring is used to prevent the bolt from popping out. The limiting actuator controls the deformation of the limiting spring to release the limiting of the bolt. This invention has a simple structure, is easy to operate, and can realize individual control of the cabinet door on which this mechanism is installed.

Description

Technical Field

[0001] This invention belongs to the field of door lock technology, specifically relating to a linked cabinet door lock. Background Technology

[0002] Cabinet door locks for double-door filing cabinets, electrical cabinets, and other similar cabinets generally come in two types: The first type uses a single-side lock, where a linkage lock is installed on the right door. To achieve effective locking, a limiting plate is welded to the left door. To lock, the left door is closed first, then the right door is closed, pressing against the limiting plate on the left door. The linkage lock on the right door then locks the right door to the cabinet body. The second type uses a flat lock on the right door, with spring pins installed at the top and bottom of the left door. To lock, the left door is closed first, and the spring pins secure it to the cabinet body. Then, the right door is closed, and the flat lock on the right door locks it to the left door.

[0003] The first type of cabinet door lock has a simple structure, but because a limiting plate needs to be welded to the left side of the cabinet door, the manufacturing process is relatively complex and the aesthetics are poor. When the right side door is opened, the left side door loses its restraint and is prone to swinging, which may cause injury to people outside. The second type of cabinet door lock can ensure independent control of the left and right side doors, but the opening and closing operations are relatively complicated and inconvenient to use. Summary of the Invention

[0004] The purpose of this invention is to provide a linkage cabinet door lock that can lock the left cabinet door in conjunction with the closing action of the right cabinet door, eliminating the need for additional lock operation. Furthermore, the lock has a limiting mechanism to maintain the locked state of the left cabinet door and prevent it from swinging due to loss of restraint.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a linkage cabinet door lock, comprising a lock body and a mounting structure, wherein the lock body is connected to the mounting structure; the lock body is provided with a locking component and a limiting mechanism;

[0006] The locking assembly includes a latch, a gear lock pin, and a rack; the latch is slidably disposed in a latch groove, and a compression spring is provided between the latch and the inner wall of the lock body; a gear lock pin is rotatably disposed on the outer side of the latch groove, one end of the gear lock pin is provided with a gear, the central axis of the gear is the rotation axis of the gear lock pin, and the other end is the locking end; the gear meshes with the rack connected to the latch to realize the linkage between the latch and the gear lock pin;

[0007] The locking assembly has an unlocked state and a locked state. In the unlocked state, the compression spring pushes the front end of the bolt out of the lock body, and the locking end of the gear lock pin screws into the lock body. In the locked state, the bolt retracts into the lock body, and the locking end of the gear lock pin screws out of the lock body. During the sliding of the bolt, the rack drives the gear lock pin to rotate, realizing the switching between the unlocked state and the locked state.

[0008] A limiting mechanism is provided on the outer side of the latch slide groove. The limiting mechanism includes a limiting spring and a limiting operating member. When the locking assembly is in the locked state, the limiting head of the limiting spring is stuck in the limiting groove on the side of the latch to prevent the latch from popping out. The limiting operating member is used to control the bending deformation of the limiting spring so that the limiting head disengages from the limiting groove and releases the limiting of the latch.

[0009] Its beneficial effects are as follows: The latch in the lock body of this invention can be linked with the gear lock pin through the transmission of the rack and pinion mechanism. When the latch pops out, the locking end of the gear lock pin is located in the lock body. After locking into the lock body, the gear lock pin rotates out of the lock body. Therefore, after installing this invention at the top or bottom of the left cabinet door, closing the left cabinet door and then closing the right cabinet door will cause the right cabinet door to squeeze the latch back, and the gear lock pin will rotate out of the lock body and lock onto the cabinet body, locking the left cabinet door. At the same time, the limiting head of the limiting spring is locked in the limiting groove of the latch, preventing the latch from being popped out by the compression spring. Thus, whether the right cabinet door is closed or open, the left cabinet door is always locked and will not swing freely, avoiding injury from swinging. When it is necessary to open the left cabinet door, the limiting spring can be used to release the limiting head of the limiting spring from the latch. The compression spring will pop out the latch, causing the gear lock pin to rotate into the lock body and disengage from the cabinet body, thus releasing the lock on the left cabinet door. Therefore, when using the present invention, it is not necessary to weld a limiting side plate on the left cabinet door when using a flat lock on the right cabinet door, nor is it necessary to install an unsightly ordinary spring pin on the left cabinet door, and the opening and closing state of the left cabinet door can be flexibly controlled.

[0010] The limiting spring is V-shaped overall, with its central part bent to form an arc-shaped spring positioning surface. The spring positioning surface bypasses the retaining post of the limiting mechanism mounting slot, so that one end of the limiting spring rests against the inner wall of the lock body, and the other end is bent into the limiting head. The portion between the limiting head and the spring positioning surface forms an inclined surface relative to the sliding direction of the bolt. The limiting operating member is used to act on the inclined surface to control the movement of the limiting head during the unlocking process.

[0011] Its beneficial effect is that the inclined surface of the limiting spring can reverse the pressure of the limiting control member, thereby causing the limiting spring to bend and deform, driving the limiting head to move and disengage from the limiting groove of the lock tongue, thus releasing the limitation on the lock tongue.

[0012] The limiting control component is an L-shaped movable plate. A pressing ball is provided on one side of the movable plate. The pressing ball extends from the ball hole on the side of the mounting groove of the limiting mechanism. The other side of the movable plate slides along the sliding groove of the movable plate. A notch is provided on the movable plate to expose the limiting head. The edge of the notch contacts the inclined surface of the limiting spring.

[0013] Its beneficial effects are: the moving plate moves linearly under the constraint of the ball hole and the moving plate slide groove, ensuring that the edge of the notch of the moving plate can squeeze the limiting spring, thereby releasing the limiting function; the notch can also constrain the limiting head, preventing the limiting head from tilting upward and deviating from the limiting groove during the deformation and movement of the limiting spring.

[0014] The limiting head is provided with a spring limiting surface, and the limiting groove is provided with a locking tongue positioning surface for cooperating with the spring limiting surface.

[0015] Its beneficial effects are: the cooperation between the spring limiting surface and the locking tongue positioning surface can increase the contact area between the limiting head and the limiting groove, and prevent the limiting head from disengaging from the limiting groove during the limiting process of the locking tongue, thus preventing the limiting failure.

[0016] Two gear locking pin rotation grooves are symmetrically distributed on both sides of the locking tongue groove, and the gear locking pin is rotatably installed in one of the gear locking pin rotation grooves; both sides of the rack are provided with teeth for meshing with the gear.

[0017] Its beneficial effects are as follows: the gear lock pin rotation grooves are distributed on both sides of the lock tongue slide groove, which can meet the locking requirements of the lock body installed at the top and bottom of the cabinet door. This allows the gear lock pin located at the top of the cabinet door to rotate upwards for locking after the lock body is installed, and the gear lock pin located at the bottom of the cabinet door to rotate downwards for locking. The symmetrical arrangement and the double-sided teeth on the rack ensure that the gear lock pin can still mesh well with the rack after the installation position is changed.

[0018] The rack is connected to the latch by a fixing pin, and the end of the rack fits into the groove on the latch.

[0019] Its beneficial effect is that the convex-concave fit structure can prevent the rack from rotating.

[0020] Two limiting mechanism mounting slots are symmetrically distributed on both sides of the locking tongue slide groove. The limiting mechanism is installed in one of the limiting mechanism mounting slots, and the limiting mechanism and the gear locking pin are located on both sides of the locking tongue slide groove.

[0021] Its advantages are: the mounting slots of the limiting mechanism are distributed on both sides of the lock tongue slide groove, which allows the limiting mechanism and the gear lock pin to be set on opposite sides according to the installation position of the lock body on the cabinet door, facilitating manual operation. The symmetrical arrangement also ensures that the limiting head of the limiting mechanism can cooperate with the limiting slots on both sides of the lock tongue.

[0022] The lock body includes a lower box and a cover. The lower box is provided with a lock tongue groove, a gear lock pin rotation groove and a limit mechanism mounting groove. The cover is fastened and fixed to the lower box.

[0023] Its beneficial effect is that it facilitates the rapid assembly of the box and corresponding components.

[0024] The gear locking pin of the lower box body is provided with a screw hole post in the rotating groove, and the screw for fixing the box cover and the lower box body is threadedly connected to the screw hole post; the gear locking pin is rotatably mounted on the screw hole post at one end, and rotates about the screw hole post as the central axis.

[0025] Its beneficial effect is that the gear lock pin can rotate around the screw hole post, eliminating the need for a specially designed gear shaft, thus saving space inside the lock body.

[0026] The installation structure is provided with a connecting buckle and a mounting buckle. The connecting buckle is used to connect with the lock body, and the mounting buckle is used to engage in the slot of the cabinet door.

[0027] Using connecting clips facilitates the quick assembly of the box body and the mounting structure, and the use of mounting clips facilitates the quick installation of the entire mechanism and the cabinet door, reducing the use of screws.

[0028] The beneficial effects of this invention are: the invention has a simple structure, is easy to operate, and is safe and reliable; it does not require separate operation of the lock body, but when the right cabinet door equipped with the flat lock is closed, the closing action of the right cabinet door is linked with the lock tongue, and then through the linkage between the lock tongue and the gear lock pin, the gear lock pin can be controlled to rotate out of the box and lock onto the cabinet body to lock the left cabinet door; since the lock tongue is limited by the limiting spring and cannot automatically pop out, the limiting spring can ensure the locked state of the gear lock pin before the limiting mechanism is operated, and even if the right cabinet door is opened thereafter, the left cabinet door will not swing freely due to the loss of restraint.

[0029] The mounting slots for installing locking components and limiting mechanisms are symmetrically arranged within the box structure of the present invention, thus satisfying the directional requirements for installation at the top and bottom of the cabinet door. This allows the gear locking pin of the cabinet door lock installed at the top of the cabinet door to rotate upwards to lock the cabinet door, and the gear locking pin of the cabinet door lock installed at the bottom of the cabinet door to rotate downwards to lock the cabinet door.

[0030] This invention features a modular structure, enabling rapid assembly and installation, and facilitating the maintenance and replacement of components later on. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2This is an exploded view of the lock body and mounting structure in this invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of the cabinet door lock when it is in the unlocked state.

[0035] Figure 4 This is a schematic diagram of the internal structure of the lock body when the cabinet door lock of the present invention is in the locked state;

[0036] Figure 5 This is a schematic diagram of the limiting component in this invention;

[0037] Figure 6 This is a schematic diagram of the state when the limiting component in this invention is performing the limiting function.

[0038] Reference numerals: 1. Screw;

[0039] 2. Lock body; 21. Lower box body; 2101. Lock tongue slide groove; 2102. Gear lock pin rotation groove; 2103. Spring groove; 2104. Tumbler hole; 2105. Locking pin; 2106. Screw hole pin; 2107. Limiting mechanism mounting groove; 2108. Moving plate slide groove; 22. Box cover;

[0040] 3. Locking assembly, 31. Lock tongue, 3101. Limiting groove, 3102. Lock tongue positioning surface, 3103. Rounded corner, 32. Fixing pin, 33. Rack, 34. Gear locking pin, 35. Compression spring;

[0041] 4. Limiting mechanism; 41. Limiting control element; 4101. Pressing ball; 4102. Moving plate; 4103. Notch; 42. Limiting spring; 4201. Spring positioning surface; 4202. Spring limiting surface; 4203. Inclined surface; 4204. Limiting head.

[0042] 5. Installation structure, 501. Connecting buckle, 502. Installation buckle. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0044] like Figure 1 , 2As shown, the linkage cabinet door lock of the present invention includes a lock body 2 and a mounting structure 5. The main body of the mounting structure 5 is a mounting plate, on which a connecting buckle 501 is provided. The connecting buckle 501 has a cylindrical mushroom head structure and is used to connect with the lock body 2. Two mounting buckles 502 are provided on the edge of the mounting plate, distributed on two perpendicular sides of the mounting plate. After the lock body 2 is connected to the mounting plate, it is engaged with the mounting groove on the inner side of the left cabinet door by the mounting buckles 502 of the mounting plate, thereby realizing the installation of the cabinet door lock on the left cabinet door.

[0045] Continue to refer to Figure 2 As shown, the lock body 2 includes a lower housing 21 and a cover 22. The cover 22 has a mounting hole, and the lower housing 21 has a screw hole post 2106. The cover 22 is fastened to the lower housing 21 and connected to the screw hole post 2106 by a screw 1 passing through the mounting hole, forming a mounting cavity for accommodating the locking assembly 3 and the limiting mechanism 4. The locking assembly 3 and the limiting mechanism 4 are installed in corresponding slots on the lower housing 21. A latch slide groove 2101 and a spring groove 2103 are provided in the middle of the lower housing 21. The latch slide groove 2101 and the spring groove 2103 are arranged in a straight line and are connected. Gear lock pin rotation groove 2102 and limit mechanism mounting groove 2107 are provided on both the left and right sides of the lock tongue slide groove 2101 and the spring groove 2103. The gear lock pin rotation groove 2102 on both sides are symmetrically arranged, and the limit mechanism mounting groove 2107 on both sides is symmetrically arranged. The limit mechanism mounting groove 2107 is connected to the lock tongue slide groove 2101, so that the limit mechanism 4 can limit the locking assembly 3.

[0046] Combination Figure 2 , 3As shown, the locking assembly 3 includes a latch 31, a fixing pin 32, a rack 33, a gear locking pin 34, and a compression spring 35. The latch 31 is slidably disposed in the latch groove 2101. A linkage inclined surface is provided at the front end of the latch 31, which acts on the latch 31 when the right cabinet door is closed to achieve linkage of the locking assembly 3. The rear end of the latch 31 is connected to the compression spring 35, which is located in the spring groove 2103. One end of the compression spring 35 abuts against the rear end face of the latch 31, and the other end abuts against the inner wall of the spring groove 2103. The compression spring 35 is used for the reset and ejection of the latch 31. The latch 31 has a groove in which the front end of the rack 33 is fitted, and the rack 33 and the latch 31 are fixedly connected by the fixing pin 32. The latch 31 drives the rack 33 to move synchronously during sliding. The rack 33 has teeth on its side. The gear locking pin 34 has a gear on its upper surface at one end and a locking end at the other end. The gear locking pin 34 is located in the gear locking pin rotation groove 2102, and the end of the gear locking pin 34 with the gear is rotatably sleeved on the screw hole post 2106. The gear meshes with the teeth on the side of the rack 33, and the rack 33 rotates during its movement, thereby causing the locking end of the gear locking pin 34 to screw in and out of the lock body 2 from the opening on the side of the gear locking pin rotation groove 2102.

[0047] like Figure 3 As shown, the limiting mechanism includes a limiting operating member 41 and a limiting spring 42. The limiting mechanism is installed in the limiting mechanism mounting groove of the lower box. The limiting spring 42 is used to cooperate with the limiting groove 3101 on the side of the latch 31 to limit the latch 31 and prevent the latch 31 from popping out automatically. The limiting operating member 41 is used to operate and control the limiting spring 42 from outside the lock body to make it elastically deform and disengage from the limiting groove 3101, thereby releasing the limitation on the latch 31.

[0048] The specific structure of the limiting mechanism is as follows: Figure 5 As shown, the limiting actuator 41 includes an L-shaped movable plate 4102. A pressing ball 4101 is provided on the short side of the movable plate 4102, and a notch 4103 is provided in the middle of the long side of the movable plate 4102. The limiting spring 42 is a V-shaped piece of metal bent into shape, with an arc-shaped spring positioning surface 4201 formed on the inner side of the bent position. The head end of the limiting spring 42 is bent to form a V-shaped limiting head 4204, which can protrude from the notch 4103 of the movable plate 4102. The installation and limiting function of the limiting mechanism 4 can be combined... Figure 6As shown, when installing the limiting mechanism, the spring positioning surface 4201 of the limiting spring 42 bypasses the locking post 2105 in the lower housing 21, and the tail end of the limiting spring 42 abuts against the inner wall of the limiting mechanism mounting groove. The portion between the spring positioning surface 4201 and the limiting head 4204 is inclined relative to the sliding direction of the latch 31, forming an inclined surface 4203. The limiting head 4204 is provided with a spring limiting surface 4202 formed by bending and perpendicular to the sliding direction of the latch 31; the limiting operating member 41 The pressing ball 4101 protrudes from the ball hole 2104 on the side of the limiting mechanism mounting groove 2107 into the lower box 21. The short side of the moving plate 4102 abuts against the side wall of the limiting mechanism mounting groove to prevent the limiting control member 41 from coming out of the ball hole 2104. The end of the moving plate 4102 away from the pressing ball 4101 is slidably set in the moving plate groove 2108 of the lower box. The cooperation between the moving plate groove 2108 and the ball hole 2104 can ensure the linear sliding of the limiting control member 41. The limiting head 4204 of the limiting spring 42 protrudes from the notch 4103 of the moving plate 4102. When the latch 31 is forcefully retracted inward, the limiting head 4204 remains in contact with the side of the latch 31 under the elastic force of the limiting spring 42. When the rounded corner 3103 on the side of the latch 31 contacts the limiting head, it begins to compress the limiting head 4204, causing the inclined surface 4203 of the limiting spring 42 to further bend inward toward the inner side of the limiting mechanism mounting groove 2107. When the limiting groove 3101 of the latch 31 reaches the position of the limiting head 4204, the squeezing force from the latch 31 on the limiting head 4204 disappears, and the limiting head 4204 pops outward into the limiting groove 3101. At the same time, under the elastic force of the compression spring 35, the latch positioning surface 3102 of the limiting groove 3101 presses against the spring limiting surface 4202 of the limiting head 4204, thereby limiting the latch 31 and preventing the latch 31 from popping out automatically. At this time, the edge of the notch 4103 on the moving plate 4102 contacts the inclined surface 4203 on the limiting spring 42. When the pressing ball 4101 is pressed, the moving plate 4102 moves towards the inside of the box. The edge of the notch 4103 squeezes the inclined surface 4203 of the limiting spring 42, causing the inclined surface 4203 of the limiting spring 42 to bend and deform into the limiting mechanism mounting groove 2107, so that the limiting head 4204 disengages from the limiting groove 3101, releasing the limitation on the locking tongue 31. The locking tongue 31 pops out under the elastic force of the compression spring 35.

[0049] As the locking tongue 31 slides along the locking tongue groove 2101, the rack 33 moves synchronously, causing the gear locking pin 34 meshing with the rack 33 to rotate, thereby rotating the locking end of the gear locking pin 34 out or into the lock body. Specifically, as shown in the figure... Figure 4 As shown, when the latch 31 retracts into the lock body, the engaging end of the gear lock pin 34 rotates out and can be locked onto the frame of the cabinet, thus locking the cabinet door to the cabinet body. At this time, the cabinet door cannot swing freely; Figure 3As shown, when the latch 31 is ejected from the lock body by the compression spring 35, the locking end of the gear lock pin 34 is screwed into the lock body, at which point the cabinet door is unlocked from the cabinet body and can be opened.

[0050] To facilitate easier manual operation of the limiting mechanism after lock body installation, the limiting mechanism and gear lock pin are positioned on opposite sides, i.e., on opposite sides of the lock tongue. When the lock body is fixed at the bottom of the left cabinet door, the gear lock pin needs to be rotated downwards to lock the left cabinet door. At this time, the limiting mechanism is located above the lock tongue, making it easier to manually press the pin to release the limiting of the lock tongue; the reverse is also true.

[0051] The installation and use process of the present invention will be described in detail below. In this embodiment, the present invention is installed on the left cabinet door, and a conventional flat lock is installed on the right cabinet door.

[0052] When installing the cabinet door lock of the present invention on the left cabinet door, one cabinet door lock needs to be installed at the top and one at the bottom of the cabinet door. During installation, the cover side of the lock body 2 faces the inside of the cabinet door. The installation positions of the gear locking pin 34 of the locking assembly 3 and the limiting mechanism 4 in the lock body 2 at the top and bottom of the cabinet door are different: For the cabinet door lock at the top of the cabinet door, the gear locking pin 34 of the locking assembly 3 is located on the right side of the latch 31, and the limiting mechanism 4 is located on the left side of the latch 31. After installation, the gear locking pin 34 needs to be rotated upwards and locked at the edge of the cabinet body. The pressing pin 4101 of the limiting mechanism 4 is located below the latch 31 for easy manual unlocking. For the cabinet door lock at the bottom of the cabinet door, the gear locking pin 34 of the locking assembly 3 is located on the left side of the latch 31, and the limiting mechanism 4 is located on the right side of the latch 31. After installation, the gear locking pin 34 needs to be rotated downwards and locked at the edge of the cabinet body. The pressing pin 4101 of the limiting mechanism 4 is located above the latch 31 for easy manual unlocking.

[0053] Under normal circumstances, such as Figure 3 As shown, the latch 31 is in the pop-out state under the action of the compression spring 35, and the gear locking pin 34 is retracted into the lock body 2. In use, first close the left cabinet door, then close the right cabinet door. The right cabinet door presses against the inclined surface of the latch 31, pushing the latch 31 back into the lock body. During the process of the latch 31 entering the lock body 2, the rack 33 drives the gear locking pin 34 to rotate, rotating the locking end of the gear locking pin 34 out of the lock body 2, as shown. Figure 4 As shown, when the bolt 31 is fully inserted into the lock body 2, the engaging end of the gear locking pin 34 is fully rotated out and locked against the edge of the cabinet, thus locking the left cabinet door. When the bolt 31 reaches... Figure 4When the latch is in the locked position, the limiting head 4204 of the limiting spring 42 in the limiting mechanism enters and gets stuck in the limiting groove 3101 on the side of the latch 31. Under the elastic force of the compression spring 35, the latch positioning surface 3102 of the limiting groove 3101 abuts against the spring limiting surface 4202 of the limiting head 4204, thereby limiting the latch 31 and preventing the latch 31 from popping out automatically. Subsequently, the right cabinet door locks with the left cabinet door through the flat lock to lock the double cabinet doors.

[0054] When opening the cabinet, first open the right cabinet door. At this time, due to the action of the limiting mechanism, the latch 31 is still inside the lock body 2, and the corresponding gear lock pin 34 is in the unscrewed state. The left cabinet door is still locked to the cabinet and will not swing freely. When it is necessary to open the left cabinet door, press the pressing ball 4101 of the limiting mechanism 4 to push the moving plate 4102 to slide. The edge of the notch 4103 on the moving plate 4102 presses the inclined surface 4203 of the limiting spring 42, forcing the inclined surface 4203 of the limiting spring 42 to bend and deform inward, causing the limiting head 4204 to disengage from the limiting groove 3101 of the latch 31. The latch 31 pops out under the elastic force of the compressed spring 35, and drives the gear lock pin 34 to rotate in the opposite direction through the rack 33, entering the lock body 2 and disengaging from the cabinet, thereby releasing the lock between the left cabinet door and the cabinet, and the left cabinet door can be opened.

[0055] The present invention provides a linkage cabinet door lock, especially for use in high-end steel cabinets. It eliminates the need to weld a limiting plate to the left cabinet door when using a simple and aesthetically pleasing flat lock, and also eliminates the need to install an unsightly ordinary spring pin on the left cabinet door. It also allows for flexible control of the opening and closing state of the left cabinet door.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A linked cabinet door lock, comprising a lock body and a mounting structure, wherein the lock body is connected to the mounting structure; characterized in that: The lock body is equipped with a locking assembly and a limiting mechanism; The locking assembly includes a latch, a gear lock pin, and a rack; the latch is slidably disposed in a latch groove, and a compression spring is provided between the latch and the inner wall of the lock body; a gear lock pin is rotatably disposed on the outer side of the latch groove, one end of the gear lock pin is provided with a gear, the central axis of the gear is the rotation axis of the gear lock pin, and the other end is the locking end; the gear meshes with the rack connected to the latch to realize the linkage between the latch and the gear lock pin; The locking assembly has an unlocked state and a locked state. In the unlocked state, the compression spring pushes the front end of the bolt out of the lock body, and the locking end of the gear lock pin screws into the lock body. In the locked state, the bolt retracts into the lock body, and the locking end of the gear lock pin screws out of the lock body. During the sliding of the bolt, the rack drives the gear lock pin to rotate, realizing the switching between the unlocked state and the locked state. A limiting mechanism is provided on the outer side of the latch slide groove. The limiting mechanism includes a limiting spring and a limiting operating member. When the locking assembly is in the locked state, the limiting head of the limiting spring is stuck in the limiting groove on the side of the latch to prevent the latch from popping out. The limiting operating member is used to control the bending deformation of the limiting spring so that the limiting head disengages from the limiting groove and releases the limiting of the latch.

2. The interlocking cabinet door lock according to claim 1, characterized in that: The limiting spring is V-shaped overall, with its central part bent to form an arc-shaped spring positioning surface. The spring positioning surface bypasses the retaining post of the limiting mechanism mounting slot, so that one end of the limiting spring rests against the inner wall of the lock body, and the other end is bent into the limiting head. The portion between the limiting head and the spring positioning surface forms an inclined surface relative to the sliding direction of the bolt. The limiting operating member is used to act on the inclined surface to control the movement of the limiting head during the unlocking process.

3. A cabinet door lock according to claim 2, characterized in that: The limiting control component is an L-shaped movable plate. A pressing ball is provided on one side of the movable plate. The pressing ball extends from the ball hole on the side of the mounting groove of the limiting mechanism. The other side of the movable plate slides along the sliding groove of the movable plate. A notch is provided on the movable plate to expose the limiting head. The edge of the notch contacts the inclined surface of the limiting spring.

4. A cabinet door lock according to claim 2, characterized in that: The limiting head is provided with a spring limiting surface, and the limiting groove is provided with a locking tongue positioning surface for cooperating with the spring limiting surface.

5. A cabinet door lock according to claim 1, characterized in that: Two gear locking pin rotation grooves are symmetrically distributed on both sides of the locking tongue groove, and the gear locking pin is rotatably installed in one of the gear locking pin rotation grooves; both sides of the rack are provided with teeth for meshing with the gear.

6. A cabinet door lock according to claim 1, characterized in that: The rack is connected to the latch by a fixing pin, and the end of the rack is in convex-concave fit with the groove on the latch.

7. A cabinet door lock according to claim 1, characterized in that: Two limiting mechanism mounting slots are symmetrically distributed on both sides of the locking tongue slide groove. The limiting mechanism is installed in one of the limiting mechanism mounting slots, and the limiting mechanism and the gear locking pin are located on both sides of the locking tongue slide groove.

8. A cabinet door lock according to claim 1, characterized in that: The lock body includes a lower box and a cover. The lower box is provided with a lock tongue groove, a gear lock pin rotation groove and a limit mechanism mounting groove. The cover is fastened and fixed to the lower box.

9. A cabinet door lock according to claim 8, characterized in that: The gear locking pin of the lower box body is provided with a screw hole post in the rotating groove, and the screw for fixing the box cover and the lower box body is threadedly connected to the screw hole post; the gear locking pin is rotatably mounted on the screw hole post at one end, and rotates about the screw hole post as the central axis.

10. A cabinet door lock according to claim 1, characterized in that: The installation structure is provided with a connecting buckle and a mounting buckle. The connecting buckle is used to connect with the lock body, and the mounting buckle is used to engage in the slot of the cabinet door.

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