Lock body

Abstract

The utility model discloses a lock body which comprises a lock shell, a locking mechanism and a linkage mechanism, and the locking mechanism comprises a spring bolt assembly, a latch bolt assembly and a heaven and earth rod assembly. The linkage mechanism comprises a toothed plate assembly and a linkage push plate, the toothed plate assembly comprises a first gear in linkage with the lock cylinder, a second gear in linkage with the handle shaft and a linkage toothed plate meshed with the first gear and the second gear, and the linkage toothed plate is provided with a first linkage structure driving the spring bolt assembly to move horizontally. The second linkage structure is used for driving the heaven and earth rod assembly to translate; the rotation stroke of the lock cylinder executing the unlocking action comprises a front section stroke and a rear section stroke, the lock cylinder only drives the first gear to rotate in the front section stroke, and the lock cylinder drives the first gear to rotate in the rear section stroke and pushes the linkage push plate to move at the same time so as to drive the latch bolt assembly to move. By optimizing a transmission mechanism and reconstructing a transmission path, synchronization, light weight and precision of unlocking operation are realized.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology, specifically relating to a lock body. Background Technology

[0002] Lock bodies typically have a bolt, latch, and top and bottom bolts. When unlocking, the lock cylinder uses multiple linkage components to move the bolt, latch, and top and bottom bolts in a linear motion. In traditional locks, the lock cylinder first drives the bolt to move horizontally. Once the bolt reaches the unlocking position, it then drives the latch to move horizontally to the unlocking position. The lock cylinder needs to rotate multiple times to complete the unlocking action, making it impossible to achieve synchronous horizontal movement of the bolt and latch, which is time-consuming and laborious. Furthermore, the movement of the top and bottom bolts is mostly driven by the bolt's main support plate. The main support plate moves the bolt and top and bottom bolts simultaneously. Because the main support plate moves linearly, its linkage structure converts the lateral movement into vertical movement, resulting in difficult unlocking. Summary of the Invention

[0003] This utility model addresses the technical problem of time-consuming and laborious unlocking of lock bodies in the prior art by providing a lock body.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A lock body includes a lock shell, and a locking mechanism and a linkage mechanism assembled within the lock shell. The locking mechanism includes a bolt assembly, a latch bolt assembly, and a top and bottom rod assembly. The linkage mechanism includes a gear plate assembly and a linkage push plate. The gear plate assembly includes a first gear that is linked to the lock cylinder, a second gear that is linked to the handle shaft, and a linkage gear plate that meshes with the first and second gears. The linkage gear plate is provided with a first linkage structure that drives the bolt assembly to move horizontally, and a second linkage structure that drives the top and bottom rod assembly to move horizontally. The rotational stroke of the lock cylinder to perform the unlocking action includes a front stroke and a rear stroke. In the front stroke, the lock cylinder only drives the first gear to rotate. In the rear stroke, the lock cylinder drives the first gear to rotate while simultaneously pushing the linkage push plate to move, thereby moving the latch bolt assembly.

[0006] Preferably, the top and bottom pole assembly includes a first bottom pole and a second bottom pole. The first bottom pole includes a first main pole and a bending arm, and the bending arm has a linkage hole. The second bottom pole includes a second main pole and a bending edge, and the bending edge has a linkage groove.

[0007] Preferably, the linkage tooth plate is rotatably mounted on the lock housing via a pin, and the second linkage structure includes a first linkage block that engages with the linkage hole and a second linkage block that engages with the linkage groove, with the first linkage block and the second linkage block respectively located on both sides of the pin.

[0008] Preferably, the latch assembly includes a main latch and a main support plate fixedly connected to the main latch. The main support plate has a triangular groove and a first guide groove. A lever is movably disposed in the triangular groove, and the pin passes through the first guide groove.

[0009] Preferably, the first linkage structure is an embedded hole formed on the linkage tooth plate, and the dial plate is formed with an insert that is embedded into the embedded hole.

[0010] Preferably, the linkage push plate includes a linkage end and a hinge end, the linkage end is provided with a top block that can abut against the lock cylinder, and the hinge end is hinged to the shift fork.

[0011] Preferably, the tongue assembly includes a tongue and a pull rod fixed to the bottom of the tongue, and a pull plate is fixed on the pull rod; the fork is mounted on the handle shaft and is linked to the handle shaft in one direction, and the fork includes a first fork arm hinged to the linkage push plate and a second fork arm capable of moving the pull plate.

[0012] Preferably, the first gear includes an arc-shaped plate and a first tooth segment formed on the outer edge of the arc-shaped plate. The arc-shaped plate is coaxial with the lock cylinder. A guide pin is fixed on the arc-shaped plate, and a guide plate is fixed on the lock housing. An arc-shaped groove that cooperates with the guide pin is opened on the guide plate.

[0013] Preferably, the second gear includes a ring fitted on the handle shaft, the ring being linked to the handle shaft in one direction, and the outer edge of the ring being provided with a second tooth segment.

[0014] Preferably, the outer edge of the linkage tooth plate is provided with a third tooth segment and a fourth tooth segment, which are respectively located on both sides of the pin shaft, and the length of the third tooth segment is greater than the length of the fourth tooth segment; the third tooth segment meshes with the first tooth segment, and the fourth tooth segment meshes with the second tooth segment.

[0015] Compared with the prior art, this utility model has the following advantages: The lock cylinder adopts a two-stage rotation stroke design. The first stage of the stroke drives the linkage gear plate through the first gear, which independently controls the main bolt and the top and bottom rod assemblies. The second stage of the stroke, while maintaining the rotation of the gear, drives the latch assembly through the linkage push plate. This enables the bolt, latch, and top and bottom rods to unlock synchronously, reducing the number of rotations of the lock cylinder and saving time and effort. The top and bottom rod assemblies are directly driven by the linkage gear plate, converting rotation into translation. Compared with converting lateral translation into vertical translation, this is more labor-saving and improves transmission efficiency. It also eliminates the linear motion conversion structure of the main support plate, making the entire linkage mechanism simpler and more efficient. The linkage components and linkage structure are reliably matched. Through motion timing control and transmission path reconstruction, the unlocking operation is synchronized, lightweight, and precise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the linkage mechanism in this utility model;

[0018] Figure 3 This is a schematic diagram of the toothed plate assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the top and bottom rod assembly and the linkage toothed plate structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the main support plate and linkage gear structure in this utility model;

[0021] Figure 6 This is another structural schematic diagram of the main support plate and the linkage gear in this utility model;

[0022] Figure 7 This is a schematic diagram of the oblique tongue assembly and the linkage push plate structure in this utility model;

[0023] The diagram shows the following markings: lock housing 10; pin 11; main bolt 21; main support plate 22; triangular groove 221; first guide groove 222; first gear 31; arc plate 311; first tooth segment 312; second gear 32; wheel ring 321; second tooth segment 322; linkage tooth plate 33; embedded hole 331; first linkage block 332; second linkage block 333; third tooth segment 334; fourth tooth segment 335; linkage push plate 34; top block 341; first ground rod 41; first main rod 411; bent arm 412; linkage hole 4121; second ground rod 42; second main rod 421; bent edge 422; linkage groove 4221; lever plate 50; embedded block 51; lever fork 60; first fork arm 61; second fork arm 62; oblique tongue 71; pull rod 72; pull plate 73. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0025] like Figure 1 As shown, this embodiment discloses a lock body, which includes a lock shell 10, and a locking mechanism and a linkage mechanism assembled in the lock shell 10. The locking mechanism includes a bolt assembly, a latch bolt 71 assembly, and a top and bottom rod assembly.

[0026] like Figures 2-7As shown, the linkage mechanism includes a gear plate assembly and a linkage push plate 34. The gear plate assembly includes a first gear 31 that is linked to the lock cylinder, a second gear 32 that is linked to the handle shaft, and a linkage gear plate 33 that meshes with the first gear 31 and the second gear 32. The linkage gear plate 33 is provided with a first linkage structure that drives the bolt assembly to move horizontally, and a second linkage structure that drives the top and bottom rod assemblies to move horizontally. The rotational stroke of the lock cylinder to perform the unlocking action includes a front stroke and a rear stroke. In the front stroke, the lock cylinder only drives the first gear 31 to rotate. In the rear stroke, the lock cylinder drives the first gear 31 to rotate while simultaneously pushing the linkage push plate 34 to move the latch bolt 71 assembly. The lock cylinder adopts a two-stage rotational stroke design. In the front stroke, the first gear 31 drives the linkage gear plate 33 to independently control the main bolt 21 and the top and bottom rod assemblies. In the rear stroke, while maintaining the rotation of the gears, the linkage push plate 34 drives the latch bolt 71 assembly. This enables the bolt, latch bolt 71, and top and bottom rods to unlock synchronously, reducing the number of rotations of the lock cylinder and saving time and effort.

[0027] The top and bottom rod assembly includes a first top rod 41 and a second top rod 42. The first top rod 41 includes a first main rod 411 and a bending arm 412, and the bending arm 412 has a linkage hole 4121. The second top rod 42 includes a second main rod 421 and a bending edge 422, and the bending edge 422 has a linkage groove 4221. The linkage tooth plate 33 is rotatably mounted on the lock housing 10 via a pin 11. The second linkage structure includes a first linkage block 332 that cooperates with the linkage hole 4121 and a second linkage block 333 that cooperates with the linkage groove 4221. The first linkage block 332 and the second linkage block 333 are respectively located on both sides of the pin 11. The first ground rod 41's bent arm 412 linkage hole 4121 cooperates with the second linkage block 333 to form a spatial crank mechanism. The second ground rod 42's bent edge 422 linkage groove 4221 cooperates with the first linkage block 332 to form an inclined plane guide mechanism. Both can convert rotation into translation. The two ground rods are directly driven by the linkage tooth plate 33 to convert rotation into translation. Compared with using the main support plate 22 to drive the conversion of lateral translation into vertical translation, it is more labor-saving and improves transmission efficiency. At the same time, the linear motion conversion structure of the main support plate 22 is eliminated, making the entire linkage mechanism simpler and more efficient.

[0028] The bolt assembly includes a main bolt 21 and a main support plate 22 fixedly connected to the main bolt 21. The main support plate 22 has a triangular groove 221 and a first guide groove 222. A lever 50 is movably disposed in the triangular groove 221, and a pin 11 passes through the first guide groove 222. The first linkage structure is an insertion hole 331 formed on the linkage tooth plate 33, and an insert 51 is formed on the lever 50 and embedded into the insertion hole 331. The triangular groove 221 cooperates with the lever 50, and the first guide groove 222 cooperates with the pin 11 to convert rotational motion into precise linear displacement, thereby realizing the locking and unlocking action of the main bolt 21.

[0029] The linkage push plate 34 includes a linkage end and a hinge end. The linkage end is provided with a top block 341 that can abut against the lock cylinder. The hinge end is hinged to the shift fork 60. The latch 71 assembly includes a latch 71 and a pull rod 72 fixed to the bottom of the latch 71. A pull plate 73 is fixed on the pull rod 72. The shift fork 60 is fitted on the handle shaft and is linked to the handle shaft in one direction. The shift fork 60 includes a first fork arm 61 hinged to the linkage push plate 34 and a second fork arm 62 capable of moving the pull plate 73. The lock cylinder pushes the linkage push plate 34 to move horizontally. The linkage push plate 34 and the shift fork 60 cooperate to realize the unlocking action of the latch 71.

[0030] The first gear 31 includes an arc-shaped plate 311 and a first tooth segment 312 formed on the outer edge of the arc-shaped plate 311. The arc-shaped plate 311 is coaxial with the lock cylinder. A guide pin is fixed on the arc-shaped plate 311, and a guide plate is fixed on the lock housing 10. An arc-shaped groove that mates with the guide pin is opened on the guide plate. The second gear 32 includes a wheel ring 321 fitted on the handle shaft. The wheel ring 321 is linked to the handle shaft in one direction. A second tooth segment 322 is provided on the outer edge of the wheel ring 321. A third tooth segment 334 and a fourth tooth segment 335 are provided on the outer edge of the linkage tooth plate 33. The third tooth segment 334 and the fourth tooth segment 335 are respectively located on both sides of the pin shaft 11, and the length of the third tooth segment 334 is greater than the length of the fourth tooth segment 335. The third tooth segment 334 meshes with the first tooth segment 312, and the fourth tooth segment 335 meshes with the second tooth segment 322. The linkage tooth plate 33 adopts an asymmetrical tooth segment layout. The longer third tooth segment 334 meshes with the first gear 31 to ensure the driving stability of the main locking tongue 21. The shorter fourth tooth segment 335 cooperates with the second gear 32 to achieve bidirectional torque transmission while satisfying the linkage stroke.

[0031] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open-ended meaning, that is, equivalent to "at least comprising...", and should not be understood as having a closed-ended meaning, that is, its meaning should not be understood as "only comprising...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0032] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A lock body, comprising a lock shell, and a locking mechanism and a linkage mechanism assembled within the lock shell; characterized in that, The locking mechanism includes a bolt assembly, a latch bolt assembly, and a top and bottom rod assembly; the linkage mechanism includes a toothed plate assembly and a linkage push plate. The toothed plate assembly includes a first gear that is linked to the lock cylinder, a second gear that is linked to the handle shaft, and a linkage toothed plate that meshes with the first and second gears. The linkage toothed plate is provided with a first linkage structure that drives the bolt assembly to move horizontally, and a second linkage structure that drives the top and bottom rod assembly to move horizontally. The rotational stroke of the lock cylinder to perform the unlocking action includes a front stroke and a rear stroke. In the front stroke, the lock cylinder only drives the first gear to rotate. In the rear stroke, the lock cylinder drives the first gear to rotate while simultaneously pushing the linkage push plate to move, thereby driving the latch bolt assembly to move.

2. A lock body according to claim 1, characterized in that, The top and bottom pole assembly includes a first bottom pole and a second bottom pole. The first bottom pole includes a first main pole and a bending arm, and the bending arm has a linkage hole. The second bottom pole includes a second main pole and a bending edge, and the bending edge has a linkage groove.

3. A lock body according to claim 2, characterized in that, The linkage tooth plate is rotatably mounted on the lock housing via a pin. The second linkage structure includes a first linkage block that engages with a linkage hole and a second linkage block that engages with a linkage groove. The first linkage block and the second linkage block are respectively located on both sides of the pin.

4. A lock body according to claim 3, characterized in that, The latch assembly includes a main latch and a main support plate fixedly connected to the main latch. The main support plate has a triangular groove and a first guide groove. A lever is movably disposed in the triangular groove, and the pin passes through the first guide groove.

5. A lock body according to claim 4, characterized in that, The first linkage structure is an embedded hole opened on the linkage tooth plate, and the dial plate is formed with an insert block embedded into the embedded hole.

6. A lock body according to claim 1, characterized in that, The linkage push plate includes a linkage end and a hinge end. The linkage end is provided with a top block that can abut against the lock cylinder, and the hinge end is hinged to the shift fork.

7. A lock body according to claim 6, characterized in that, The oblique tongue assembly includes an oblique tongue, and A pull rod is fixed to the bottom of the inclined tongue, and a pull plate is fixed on the pull rod; the shift fork is mounted on the handle shaft, and the shift fork includes a first fork arm hinged to the linkage push plate, and a second fork arm capable of moving the pull plate.

8. A lock body according to any one of claims 1-7, characterized in that, The first gear includes an arc-shaped plate and a first tooth segment formed on the outer edge of the arc-shaped plate. The arc-shaped plate is coaxial with the lock cylinder. A guide pin is fixed on the arc-shaped plate. A guide plate is fixed on the lock housing. An arc-shaped groove that cooperates with the guide pin is opened on the guide plate.

9. A lock body according to claim 8, characterized in that, The second gear includes a ring fitted on the handle shaft, and the outer edge of the ring is provided with a second tooth segment.

10. A lock body according to claim 9, characterized in that, The outer edge of the linkage gear plate is provided with a third tooth segment and a fourth tooth segment, which are respectively located on both sides of the pin shaft, and The length of the third tooth segment is greater than the length of the fourth tooth segment; the third tooth segment meshes with the first tooth segment, and the fourth tooth segment meshes with the second tooth segment.

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