A lock body with a new type of lock cylinder and latch bolt linkage structure

Abstract

The utility model relates to a lock body with novel lock cylinder and latch linkage structure. It includes lock shell, lock cylinder, main tongue, main tongue linkage piece, handle pivot, lower push piece, upper push piece, push rod and oblique tongue, and the rear end fixed connection of main tongue has main tongue piece, is equipped with first sliding slot and boss on main tongue piece, and main tongue linkage piece is rotatably connected on lock shell, and the first push rod is protruded on main tongue linkage piece, and the other side of main tongue linkage piece still protrudes second push rod, and upper push piece rotatably sets up on handle pivot, and upper push piece extends first extension piece to main tongue side, and one end of push rod is rotatably connected on first extension piece, and the other end of push rod is restrained between first push rod and boss. Compared with prior art, the utility model can obviously reduce the swing amplitude of push rod, thus helping to reduce the width requirement of lock shell, so that the utility model is suitable for narrow lock body and small size lock body.

Description

Technical Field

[0001] This utility model relates to a door lock, and more particularly to a lock body with a novel lock cylinder oblique tongue linkage structure. Background Technology

[0002] Door locks, especially those for security doors, typically consist of a lock cylinder, a handle, a latch, and a main bolt. The lock cylinder is controlled by the key on the outside, while the handle is controlled by the key on the inside. The handle's pivot usually has a lower and upper lever. One side of the upper lever is connected to a push rod, and the other side is linked to the latch. The other end of the push rod is close to the lock cylinder. The lower lever is connected to a main bolt linkage plate, which is linked to the main bolt. Therefore, by reversing the handle, the main bolt can be extended; by turning the handle forward, the main bolt and / or the latch can be retracted. Turning the key forward on the lock cylinder drives the push rod and upper lever, controlling the extension and retraction of the latch. Reversing the key on the lock cylinder pushes the main bolt linkage plate to rotate, extending the main bolt. Because the push rod is positioned where it would hit the lock cylinder when it is reversed, to avoid interference with the lock cylinder's rotation, current door locks rivet the push rod to the main bolt. This way, when the main bolt extends outward, it causes the push rod to deflect outward, preventing a physical collision between the push rod and the lock cylinder.

[0003] However, the extension stroke of the master tongue is generally not less than 2 cm, so the deflection range of the push rod is relatively large. In order to allow enough room for the push rod to move, the size of the lock body is also limited and cannot be made narrower or smaller. Summary of the Invention

[0004] This utility model provides a lock body with a novel lock cylinder and oblique tongue linkage structure; it solves the problem in the prior art that the lock body cannot be further reduced in size in order to leave space for the deflection of the push rod.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: A lock body with a novel lock cylinder and oblique latch linkage structure includes a lock shell, a lock cylinder, a main latch, a main latch linkage plate, a handle shaft, a lower lever, an upper lever, a push rod, and an oblique latch. The main latch is slidably mounted on one side of the lock shell, and the oblique latch is movably mounted on the other side of the lock shell. The lock cylinder is rotatably located on the outside of the main latch. A main latch plate is fixedly connected to the rear end of the main latch. The main latch plate has a first vertically penetrating groove and an upwardly protruding boss. The main latch linkage plate is rotatably connected to the lock shell and located below the main latch plate. A first lever protrudes through the first groove and protrudes from the main latch linkage plate. A second lever protrudes from the other side of the main latch linkage plate. The lever has a handle shaft rotatably connected to the lock housing and located between the main latch and the oblique latch. One end of the lower lever is fixed to the handle shaft, and the other end is provided with a second sliding groove. The second sliding groove is inserted and engaged with the second lever. The upper lever is rotatably sleeved on the handle shaft. A first extension piece extends from the upper lever toward the main latch. One end of the push rod is rotatably connected to the first extension piece. The other end of the push rod is constrained between the first lever and the boss. A second extension piece extends from the upper lever toward the oblique latch. A pull rod is provided at the rear end of the oblique latch. A first limiting piece is provided at the end of the pull rod. A return spring and a second limiting piece are also sleeved on the pull rod. The second extension piece is located between the two limiting pieces.

[0006] When the handle shaft is rotated to the unlock position, the main tongue linkage plate flips synchronously under the linkage of the lower lever plate, the first lever pulls the main tongue plate and the main tongue to retract inward, and at the same time the first lever pushes the push rod to flip closer to the lock cylinder.

[0007] When the handle shaft is rotated in the opposite direction to the locked position, the main tongue linkage plate is synchronously flipped in the opposite direction under the linkage of the lower lever plate. The first lever pushes the main tongue plate and the main tongue to move outward, and at the same time the boss pushes the push rod to flip to the side away from the lock cylinder.

[0008] Therefore, when this invention is in the non-deadlock state, i.e., when the bolt is retracted, the push rod is within the controllable area of ​​the lock cylinder. Rotating the lock cylinder pushes the push rod, causing the upper lever to flip, thereby pulling the lever and the latch, thus controlling the latch. In this state, the flipping of the upper lever does not cause the handle shaft to rotate. When this invention is in the deadlock state, i.e., when the bolt is extended, the push rod is pushed away from the controllable area of ​​the lock cylinder by the boss. Therefore, in this state, the lock cylinder cannot control the latch. Compared to existing structures, this invention significantly reduces the swing amplitude of the push rod, thus helping to reduce the width requirement of the lock case, making this invention suitable for narrow and small-sized lock bodies. Simultaneously, this invention eliminates the riveting process between the push rod and the bolt / bolt plate, reducing parts and production steps, which helps to lower production costs and improve production efficiency.

[0009] Furthermore, a positioning shaft is fixed on the lock housing and located on one side of the main tongue linkage plate, and an elastic element is connected between the positioning shaft and the main tongue linkage plate. When the present invention switches between the locked and unlocked states, the main tongue linkage plate will switch between two rotation angles. During the switching process in any direction, the elastic element will undergo a state of gradually deforming and gradually returning to its original shape. Therefore, the rebound effect of the elastic element will tend to stabilize the main tongue linkage plate in either the locked or unlocked state.

[0010] Furthermore, the elastic element comprises a torsion spring body, a first torsion arm, a second torsion arm, and a torsion spring sleeve. The torsion spring sleeve is fitted onto the positioning shaft. The first torsion arm is hinged to the main tongue linkage plate, and the end of the first torsion arm has a Z-shaped structure. The torsion spring sleeve, fitted onto the positioning shaft, not only positions the second torsion arm but also provides axial constraint to maintain the vertical state of the torsion spring body. A positioning hole is provided in the corresponding area of ​​the main tongue linkage plate, allowing the Z-shaped structure of the first torsion arm to be quickly inserted into the positioning hole, facilitating installation and preventing it from easily falling off.

[0011] Therefore, this utility model has the following characteristics compared with the prior art: 1. Compared with the existing structure, this utility model can significantly reduce the swing amplitude of the push rod, thus helping to reduce the width requirement of the lock body, making this utility model suitable for narrow lock bodies and small-sized lock bodies; 2. This utility model eliminates the riveting process of the push rod and the main tongue / main tongue plate, which can reduce accessories and production processes, and is conducive to reducing production costs and improving production efficiency; 3. The elastic element is reliably installed and is not easy to fall off. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the structure of the present invention when the main tongue is retracted;

[0013] Appendix Figure 2 This is a schematic diagram of the structure of the present invention when the main tongue is extended;

[0014] Appendix Figure 3 This is a schematic diagram of the structure of this utility model;

[0015] Appendix Figure 4 It is an assembly drawing of the positioning shaft and the elastic element. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Example 1: See Figure 1 , Figure 2 and Figure 3 A lock body with a novel lock cylinder and oblique latch linkage structure includes a lock shell 100, a lock cylinder 200, a main latch 300, a main latch linkage plate 400, a handle pivot 500, a lower lever 600, an upper lever 700, a push rod 800, and an oblique latch 900. The lock shell is divided into an upper shell 110 and a lower shell 120 that overlap each other. The main latch is slidably mounted on one side of the lock shell, and the oblique latch is movably mounted on the other side of the lock shell. The lock cylinder is rotatably located on the outside of the main latch. A main latch plate 310 is fixedly connected to the rear end of the main latch. The main latch plate has a first through groove 311 and an upwardly protruding boss 312. The main latch linkage plate is rotatably connected to the lock shell and located below the main latch plate. A first lever 410 protrudes through the first through groove and protrudes from the main latch linkage plate. A second lever protrudes from the other side of the main latch linkage plate. 420, the main tongue linkage plate is also provided with a snap-fit ​​groove 430 that can be driven by the lock cylinder on the side near the lock cylinder. The handle shaft is rotatably connected to the lock housing and located between the main tongue and the oblique tongue. One end of the lower lever is fixed to the handle shaft, and the other end is provided with a second slide groove 610. The second slide groove is inserted and engaged with the second lever. The upper lever is rotatably sleeved on the handle shaft. A first extension piece 710 extends from the upper lever toward the main tongue. One end of the push rod is rotatably connected to the first extension piece. The other end of the push rod is constrained between the first lever and the boss. A second extension piece 720 extends from the upper lever toward the oblique tongue. A pull rod 910 is provided at the rear end of the oblique tongue. A first limiting piece 920 is provided at the end of the pull rod. A return spring 930 and a second limiting piece 940 are also sleeved on the pull rod. The second extension piece is located between the two limiting pieces.

[0019] When the handle shaft is rotated to the unlock position, the main tongue linkage plate flips synchronously under the linkage of the lower lever plate. The first lever pulls the main tongue plate and the main tongue inward and retracts inward. At the same time, the first lever pushes the push rod to flip towards the side closer to the lock cylinder.

[0020] When the handle shaft is rotated in the opposite direction to the locked position, the main tongue linkage plate flips in the opposite direction under the linkage of the lower lever. The first lever pushes the main tongue plate and the main tongue to move outward, while the boss pushes the push rod to flip to the side away from the lock cylinder.

[0021] Therefore, when this embodiment is in the non-deadlock state, i.e., when the bolt is retracted, the push rod is in the controllable area of ​​the lock cylinder. Rotating the lock cylinder can push the push rod, causing the upper lever to flip, thereby pulling the lever and the latch, thus controlling the latch. In this case, the flipping of the upper lever does not cause the handle shaft to rotate. When this embodiment is in the deadlock state, i.e., when the bolt is extended, the push rod is pushed away from the controllable area of ​​the lock cylinder by the boss. Therefore, in this state, the lock cylinder cannot control the latch. Compared with existing structures, this embodiment can significantly reduce the swing amplitude of the push rod, thus helping to reduce the width requirement of the lock case, making this embodiment suitable for narrow lock bodies and small-sized lock bodies. At the same time, this embodiment eliminates the riveting process between the push rod and the bolt / bolt plate, reducing parts and production steps, which is beneficial for reducing production costs and improving production efficiency.

[0022] See Figure 1 A positioning shaft 130 is fixed on the lock housing and located on one side of the main tongue linkage plate. An elastic element 140 is connected between the positioning shaft and the main tongue linkage plate. When switching between the locked and unlocked states in this embodiment, the main tongue linkage plate will switch between two rotation angles. During the switching process in any direction, the elastic element will undergo a state of gradual deformation and gradual return to its original state. Therefore, the rebound effect of the elastic element will tend to stabilize the main tongue linkage plate in the locked or unlocked state.

[0023] See Figure 3 The elastic element consists of a torsion spring body 141, a first torsion arm 142, a second torsion arm 143, and a torsion spring sleeve 144. The torsion spring sleeve is fitted onto the positioning shaft. The first torsion arm is hinged to the main tongue linkage plate, and the end of the first torsion arm has a Z-shaped structure. The torsion spring sleeve, when fitted onto the positioning shaft, not only positions the second torsion arm but also provides axial constraint to maintain the vertical state of the torsion spring body. The corresponding area of ​​the main tongue linkage plate has a positioning hole 440, allowing the Z-shaped structure of the first torsion arm to be quickly inserted into the positioning hole for easy installation and to prevent it from easily falling off.

[0024] See Figure 3 The main tongue plate is also provided with an upward protruding guide rod 313, and the upper side of the lock housing is provided with a guide groove 150 parallel to the extension and retraction direction of the main tongue. The guide rod is slidably inserted into the guide groove.

[0025] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A lock body with a novel lock cylinder and oblique latch linkage structure, comprising a lock shell, a lock cylinder, a main latch, a main latch linkage plate, a handle pivot, a lower lever, an upper lever, a push rod, and an oblique latch, characterized in that: The main bolt is slidably mounted on one side of the lock housing, and the latch bolt is movably mounted on the other side of the lock housing. The lock cylinder is rotatably located on the outside of the main bolt. A main bolt plate is fixedly connected to the rear end of the main bolt. The main bolt plate has a first through groove and an upwardly protruding boss. The main bolt linkage plate is rotatably connected to the lock housing and located below the main bolt plate. A first lever protrudes through the first groove and protrudes from the main bolt linkage plate. A second lever also protrudes from the other side of the main bolt linkage plate. The handle shaft is rotatably connected to the lock housing and located between the main bolt and the latch bolt. One end of the lower lever... Fixed to the handle shaft, the other end is provided with a second sliding groove, the second sliding groove is inserted and engaged with the second lever, the upper lever is rotatably sleeved on the handle shaft, the upper lever has a first extension piece extending towards the main tongue side, one end of the push rod is rotatably connected to the first extension piece, the other end of the push rod is constrained between the first lever and the boss, the upper lever has a second extension piece extending towards the oblique tongue side, the rear end of the oblique tongue is provided with a pull rod, the end of the pull rod is provided with a first limiting piece, the pull rod is also sleeved with a return spring and a second limiting piece, the second extension piece is located between the two limiting pieces; When the handle shaft is rotated to the unlock position, the main tongue linkage plate flips synchronously under the linkage of the lower lever plate, the first lever pulls the main tongue plate and the main tongue to retract inward, and at the same time the first lever pushes the push rod to flip closer to the lock cylinder. When the handle shaft is rotated in the opposite direction to the locked position, the main tongue linkage plate is synchronously flipped in the opposite direction under the linkage of the lower lever plate. The first lever pushes the main tongue plate and the main tongue to move outward, and at the same time the boss pushes the push rod to flip to the side away from the lock cylinder.

2. The lock body with a novel lock cylinder oblique tongue linkage structure according to claim 1, characterized in that: A positioning shaft is fixed on the lock housing and on one side of the main tongue linkage piece, and an elastic element is connected between the positioning shaft and the main tongue linkage piece.

3. The lock body with a novel lock cylinder oblique tongue linkage structure according to claim 2, characterized in that: The elastic element consists of a torsion spring body, a first torsion arm, a second torsion arm, and a torsion spring sleeve. The torsion spring sleeve is sleeved on the positioning shaft. The first torsion arm is hinged to the main tongue linkage plate. The end of the first torsion arm has a Z-shaped structure.

4. The lock body with a novel lock cylinder oblique tongue linkage structure according to claim 1, characterized in that: The main tongue plate is also provided with an upwardly protruding guide rod, and the upper side of the lock housing is provided with a guide groove parallel to the extension and retraction direction of the main tongue plate, and the guide rod is slidably inserted into the guide groove.

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