Double-latch door lock

Abstract

This utility model discloses a double-latch door lock, including a lock shell. Inside the lock shell are a square latch assembly and a bevel latch assembly. A dial assembly is connected to the bevel latch assembly, and the dial assembly and the square latch assembly are connected via a transmission plate. The dial assembly has a first elastic reset component for assisting its torsional reset. The square latch assembly includes a square latch block, an extension plate, and a second elastic reset component. The first elastic reset component includes a T-shaped support block, on which the first elastic component is fitted. The tail end of the first elastic component slides through a positioning plate, which is fixedly mounted to the inner wall of the lock shell. The second elastic reset component includes a sliding plate and a support strip integrally formed with the sliding plate. The second elastic component is fitted on the support strip, and its tail end slides through the positioning plate. The sliding plate also has a longitudinal groove and a limiting stop. The longitudinal groove engages with a sliding pin on the inner wall of the lock shell to achieve vertical displacement of the sliding plate. This utility model has the advantages of long service life and high working quality.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and more specifically, to a double-latch door lock. Background Technology

[0002] Double-latch locks typically include a beveled latch mechanism and a square latch mechanism. Both mechanisms include a latch control mechanism, which often incorporates a spring structure for resetting and rebounding the internal structure. Application number 200810026082.1 discloses a double-latch lock body, which is described in the specification and appendix. Figure 3 The previous paper disclosed a positioning spring 43 on the square latch assembly and a fork spring 62 on the oblique latch assembly. Both springs are used to assist the mechanical structure in resetting and rebounding during the unlocking or locking process of the lock. However, under long-term use, the simple spring structure is prone to deformation and loss of elasticity, directly affecting the overall locking and unlocking quality of the lock. Based on this problem, this application proposes an improved double-latch door lock with an improved internal spring structure, resulting in a longer service life and higher working quality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-latch door lock with optimized structure, improved performance and long service life.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-latch door lock, including a lock shell, with a square latch assembly and a bevel latch assembly inside the lock shell. A dial assembly is connected to the bevel latch assembly, and the dial assembly and the square latch assembly are connected by a transmission plate. The dial assembly is provided with an elastic reset element one for assisting its torsional reset. The square latch assembly includes a square latch block, an extension plate, and an elastic reset element two. The elastic reset element one includes a T-shaped support block, on which the elastic element one is sleeved. The tail end of the elastic element one is slidably fitted through a positioning plate. The positioning plate is fixedly mounted on the inner wall of the lock shell. The elastic reset element two includes a sliding plate and a support strip integrally formed with the sliding plate. The elastic element two is sleeved on the support strip, and the tail end of the support strip is slidably fitted through the positioning plate. The sliding plate is also provided with a longitudinal groove and a limiting block. The vertical displacement of the sliding plate is achieved by cooperating with the sliding pin on the inner wall of the lock shell through the longitudinal groove.

[0005] The present invention is further configured such that: the dial assembly includes a square core seat and a dial assembly sleeved outside the square core seat and moving together; the dial assembly includes a dial one at the bottom, a dial two in the middle layer and a dial three at the top layer; wherein the dial one is provided with a dial block one extending into the tongue assembly and a pressing block one abutting against the support block; the dial two is provided with a pressing block two abutting against the support block; and the dial three is provided with a dial block two extending into the tongue assembly and a hook block connected to the transmission plate.

[0006] The present invention is further configured such that: both the first and second pressure blocks are provided with grooves, and the end of the support block is engaged in the groove.

[0007] The present invention is further configured such that: the extension piece is provided with a transverse sliding groove, the transverse sliding groove is slidably engaged with a sliding pin, and the extension piece is also provided with two limiting protrusions with inclined surfaces, limiting grooves are formed between the limiting protrusions and between the limiting protrusions and the extension piece, and the limiting stop is located in the limiting groove.

[0008] The present invention is further configured such that: the oblique tongue assembly includes an oblique tongue block, a push rod sleeved with a spring, and a push block located at the tail end of the push rod; the inner wall of the lock housing is provided with a positioning seat; the tail end of the push rod passes through the positioning seat, forming a push groove between the positioning seat and the push block; and the first and second push blocks are located in the push groove.

[0009] By adopting the above technical solution, the structural stability of the spring is significantly improved. By sliding the T-shaped support block with the positioning plate and the support bar with the positioning plate, the structure is changed to a "support-guided" structure, which avoids lateral bending deformation of the spring when it is compressed, improves the directional stability of the reset force, makes the lock more durable, and is suitable for high-frequency opening and closing scenarios. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of a partial structure of the present invention; Figure 3 This is an exploded view of a partial structure of the tongue-and-groove assembly; Figure 4 This is an exploded view of the dial assembly structure.

[0011] 1. Lock housing; 10. Sliding pin; 11. Positioning seat; 12. Positioning plate; 2. Square tongue assembly; 20. Elastic reset component two; 200. Slide plate; 201. Support bar; 202. Elastic component two; 203. Longitudinal slide groove; 204. Limiting block; 205. Limiting groove; 21. Square tongue block; 22. Extension piece; 3. Slanted tongue assembly; 30. Slanted tongue block; 31. Push rod; 32. Push block; 4. Dial wheel assembly; 40. Elastic reset component one; 400. Support block; 401. Elastic component one; 41. Square core seat; 42. Dial plate one; 420. Dial block one; 421. Pressing block one; 43. Dial plate two; 430. Pressing block two; 431. Groove; 44. Dial plate three; 440. Dial block two; 441. Hook block; 5. Transmission plate. Detailed Implementation

[0012] Reference Figures 1 to 4 The embodiments of this utility model will be further described below.

[0013] A double-latch door lock includes a lock housing 1, within which a square latch assembly 2 and a bevel latch assembly 3 are provided. A dial assembly 4 is connected to the bevel latch assembly 3, and the dial assembly 4 is connected to the square latch assembly 2 via a transmission plate 5. The dial assembly 4 is provided with a first elastic reset element 40 for assisting its torsional reset. The square latch assembly 2 includes a square latch block 21, an extension piece 22, and a second elastic reset element 20. The first elastic reset element 40 includes a T-shaped support block 400, on which an elastic element 401 is sleeved. The tail end of component 1 is slidably fitted through the positioning plate 12, which is fixedly mounted on the inner wall of the lock housing 1. The elastic reset component 20 includes a sliding plate 200 and a support strip 201 integrally formed with the sliding plate 200. An elastic component 202 is sleeved on the support strip 201. The tail end of the support strip 201 is slidably fitted through the positioning plate 12. The sliding plate 200 is also provided with a longitudinal sliding groove 203 and a limiting block 204. The vertical displacement of the sliding plate 200 is realized by the longitudinal sliding groove 203 cooperating with the sliding nail 10 on the inner wall of the lock housing 1. The inclined tongue assembly 3 includes an inclined tongue block 30, a push rod 31 with a spring sleeve, and a push block 32 located at the tail end of the push rod 31. The inner wall of the lock housing 1 is provided with a positioning seat 11. The tail end of the push rod 31 passes through the positioning seat 11, forming a push groove between the positioning seat 11 and the push block 32. The first toggle block 420 and the second toggle block 440 are located in the push groove.

[0014] The dial assembly 4 includes a square core seat 41 and a paddle group sleeved and connected to the square core seat 41. The paddle group includes a bottom paddle 42, a middle paddle 43, and an upper paddle 44. The bottom paddle 42 has a paddle block 420 extending into the tongue assembly 3 and a pressing block 421 abutting against the support block 400. The middle paddle 43 has a pressing block 430 abutting against the support block 400. The upper paddle 44 has a paddle block 440 extending into the tongue assembly 3 and a hook block 441 connected to the transmission plate 5. Both the pressing block 421 and the pressing block 430 have grooves 431, and the end of the support block 400 is engaged in the grooves 431. The extension piece 22 is provided with a transverse sliding groove, which is slidably engaged with the sliding pin 10. The extension piece 22 is also provided with two limiting protrusions with inclined surfaces. Limiting grooves 205 are formed between the limiting protrusions and between the limiting protrusions and the extension piece 22. The limiting block 204 is located in the limiting groove 205.

[0015] Working principle: The square core seat 41 inside the dial assembly 4 cooperates with the door handle. By turning the handle, the dial assembly is rotated. The first dial block 420 and the second dial block 440 on the dial assembly push the push block 32 on the latch assembly 3, so that the push rod 31 drives the latch to move towards the lock housing 1, thereby achieving the purpose of unlocking. When the dial assembly 4 is in motion, the first pressure block 421 and the second pressure block 430 will press down on the support block 400, so that the support block 400 slides towards the positioning plate 12. The elastic element 401 contracts. After the external force is lost, the dial assembly 4 is reset by the contracted elastic element and the support block 400. When the square tongue assembly 2 cooperates with the actuating component on the lock cylinder structure, causing the extension piece 22 to slide inwards and outwards towards the lock housing 1, the limiting block 204 on the sliding plate 200 is subjected to the pressure of the limiting protrusion and moves upwards along the inclined surface, causing the support bar 201 to move towards the positioning plate 12. The elastic element 202 contracts, and after losing the external compressive force, it resets, causing the support bar 201 to reset. The improved structure of the reset elastic element 401 and the reset elastic element 201, by adding a support structure inside the elastic element, makes its working stability high, less prone to damage, and has the advantage of durability.

[0016] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A double deadbolt door lock comprising a lock housing, a square bolt assembly and a latch bolt assembly are arranged in the lock housing, a dial assembly is connected to the latch bolt assembly, and a transmission plate is arranged between the dial assembly and the square bolt assembly, characterized in that: The dial assembly is provided with an elastic reset component 1 for assisting its torsional reset. The square tongue assembly includes a square tongue block, an extension piece, and an elastic reset component 2. The elastic reset component 1 includes a T-shaped support block, on which the elastic component 1 is sleeved. The tail end of the elastic component 1 slides through a positioning plate. The positioning plate is fixedly mounted on the inner wall of the lock housing. The elastic reset component 2 includes a sliding plate and a support strip integrally formed with the sliding plate. The elastic component 2 is sleeved on the support strip, and the tail end of the support strip slides through the positioning plate. The sliding plate is also provided with a longitudinal groove and a limiting stop. The vertical displacement of the sliding plate is achieved by cooperating with the sliding pin on the inner wall of the lock housing through the longitudinal groove.

2. A double-tumbler door lock according to claim 1, characterized in that: The dial assembly includes a square core seat and a paddle group sleeved outside the square core seat and moving together. The paddle group includes a paddle one at the bottom, a paddle two in the middle layer, and a paddle three at the top layer. Paddle one is provided with a paddle block one extending into the tongue assembly and a pressing block one abutting against the support block. Paddle two is provided with a pressing block two abutting against the support block. Paddle three is provided with a paddle block two extending into the tongue assembly and a hook block connected to the transmission plate.

3. A double-throw mortice lock according to claim 2 wherein: Both the first and second pressure blocks are provided with grooves, and the end of the support block is engaged in the groove.

4. A double-locked tongue type door lock according to claim 3, characterized in that: The extension piece is provided with a transverse sliding groove, which slides in conjunction with a sliding pin. The extension piece is also provided with two limiting protrusions with inclined surfaces. Limiting grooves are formed between the limiting protrusions and between the limiting protrusions and the extension piece. The limiting stop is located in the limiting groove.

5. A double latch mortice lock according to claim 2 wherein: The latch assembly includes a latch block, a spring-loaded push rod, and a push block located at the tail end of the push rod. The inner wall of the lock housing is provided with a positioning seat. The tail end of the push rod passes through the positioning seat, forming a push groove between the positioning seat and the push block. The first and second paddle blocks are located in the push groove.

Images