Seat back lock

Abstract

The seat backrest lock comprises a lock body, a lock blade and a locking plate, the lock body is provided with a lock opening allowing an external automobile lock bolt to be placed in, the lock blade is bent towards the direction of the lock opening to form a lock hook used for sealing an opening of the lock opening, and the locking plate is provided with a pressing rod used for driving the locking plate to move when being pressed and releasing limitation on movement of the lock blade. A reset structure used for driving the lock blade and the locking plate to movably reset is arranged on the lock body, and a linkage block is arranged at the position, close to the lock opening, of the outer wall of the lock body. The buffer block is used for reducing the impact force of the automobile lock bolt and reducing the collision strength between the automobile lock bolt and the inner circumferential wall of the lock opening and between the automobile lock bolt and the lock blade when the external automobile lock bolt is placed into the lock opening, and the reinforcing structure is used for improving the buffering force of the buffer block on the external automobile lock bolt. The automobile seat backrest lock solves the problem that a traditional seat backrest lock is prone to excessively colliding with a lock opening or a lock blade when an automobile lock bolt is placed in so that parts can be damaged or large noise can be generated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat backrest lock, specifically is a seat backrest lock. BACKGROUND

[0002] In the design of automobile seat, the seat backrest lock plays a key role, which guarantees that the seat backrest can be stably in the set position when using. When the external automobile lock bolt is placed into the lock port of the traditional seat backrest lock, due to the lack of effective buffer and protection mechanism, the automobile lock bolt is prone to excessive collision with the inner circumferential wall of the lock port and the lock leaf. Such violent collision will cause the lock port, lock leaf and other components to be damaged, such as wear and deformation, which shortens the service life of the seat backrest lock. On the other hand, the large noise generated by the collision will also bring adverse effects to the in-vehicle environment and reduce the riding comfort. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a seat backrest lock to solve the problem that the traditional seat backrest lock is prone to excessive collision with the lock port or the lock leaf when the automobile lock bolt is placed, resulting in component damage or large noise.

[0004] To achieve the above purpose, the utility model provides a seat backrest lock, which comprises a lock body, a lock leaf movably arranged in the lock body, and a locking plate for linkage cooperation with the lock leaf to limit the movement of the lock leaf. The lock body is provided with a lock port for placing the external automobile lock bolt, the lock leaf is bent towards the lock port and provided with a lock hook for closing the opening of the lock port, the locking plate is provided with a pressure rod for driving the locking plate to move when pressure is applied and releasing the movement restriction of the lock leaf, the lock body is provided with a reset structure for driving the lock leaf and the locking plate to move back to the original position, the outer wall of the lock body is provided with a linkage block near the lock port, the linkage block is provided with a buffer block for reducing the impact force of the automobile lock bolt and the collision strength between the automobile lock bolt and the inner circumferential wall of the lock port and the lock leaf when the external automobile lock bolt is placed into the lock port, and a reinforcing structure for improving the buffering degree of the buffer block to the external automobile lock bolt.

[0005] The above technical scheme has the advantages that: first, the lock leaf is precisely installed in the preset movable track in the lock body, ensuring that it can rotate flexibly, and the lock hook bending angle of the lock leaf meets the design standard to precisely close the lock opening; then, the locking plate is installed in place, ensuring that the linkage between the locking plate and the lock leaf is accurate, the pressure rod can smoothly respond to external force, the reset structure is installed at the corresponding position of the lock body, ensuring that it can provide stable reset elastic force for the lock leaf and the locking plate, finally, the linkage block is stably installed on the outer wall of the lock body near the lock opening, and the buffer block and the reinforcing structure are sequentially assembled on the linkage block, when the external automobile lock bolt is inserted into the lock opening, the buffer block on the linkage block is first contacted, the buffer block absorbs the initial impact force of the automobile lock bolt by means of its elastic deformation, reduces the collision strength, and avoids that the lock bolt directly and heavily impacts the inner peripheral wall of the lock opening and the lock leaf. At the same time, the reinforcing structure enhances the support force and the reaction force of the buffer block from the structure level, so that the buffer block can more stably resist the impact force when being pressed, and the seat backrest lock is protected in all directions, the damage caused by the collision is reduced, and the noise generated by the collision is also reduced; compared with the traditional seat backrest lock, the utility model adds the linkage block with the buffer block and the reinforcing structure near the lock opening, effectively solves the problem that the traditional seat backrest lock is easily collided with the lock opening or the lock leaf when the automobile lock bolt is inserted, causing the components to be damaged or generating a large noise, prolongs the service life of the seat backrest lock, and improves the comfort of the vehicle interior; the reset spring is connected between the inner wall of the lock cavity and the initial end of the pressure rod, the pressing direction in which the pressure rod drives the locking plate to swing is arranged in the same direction as the stretching direction of the reset spring, the limiting protrusion is arranged on the locking plate and faces the lock leaf, the limiting groove is arranged on the lock leaf and locally inserts and inserts the limiting protrusion, the reset torsion spring is connected between the lock leaf and the corresponding rivet of the lock leaf and is used for driving the lock leaf to swing and reset and exposing the lock hook at the opening of the lock opening, the reset torsion spring and the reset spring are the reset structure, the reset structure is the prior art, that is, the traditional backrest lock also has the reset structure, therefore, it will not be described in detail, and the cooperation of the limiting protrusion and the limiting groove realizes the locking cooperation of the locking plate and the lock leaf, and the limiting of the locking plate to the lock leaf when the lock hook closes the lock opening avoids the swing or swing of the lock leaf, and the locking structure is also the prior art, therefore, it will not be described in detail.

[0006] The utility model further sets up: the buffer groove is set up in the height direction of the linkage block, the buffer groove opening is close to the lock opening position setting, the buffer block is set up in the buffer groove, the buffer block top wall horizontal plane and lock hook inner wall horizontal plane parallel setting, the interval between the buffer block top wall horizontal plane and lock hook inner wall horizontal plane is less than the interval between lock hook inner wall horizontal plane and lock opening bottom wall horizontal plane, the buffer block is made of rubber material.

[0007] The beneficial effects of the above technical scheme are that: the buffering groove opened in the height direction of the linkage block provides a specific movement space for the buffering block, and the opening of the buffering groove is close to the lock opening position, so that the buffering block can be accurately positioned on the path where the automobile lock bolt is placed. When the lock bolt enters the lock opening, it can first contact the buffering block to ensure that the buffering action is triggered in time, avoiding the lock bolt from impacting the components in the deep part of the lock opening without buffering. When the top wall horizontal surface of the buffering block is parallel to the inner wall horizontal surface of the lock hook, the parallel relationship makes the buffering block and the lock hook cooperate more tacitly in space. When the impact force of the lock bolt is transmitted, the buffering block can receive it at the most suitable angle to evenly disperse the impact force and prevent the buffering effect from being weakened due to angle deviation. Moreover, the distance between the top wall horizontal surface of the buffering block and the inner wall horizontal surface of the lock hook is smaller than the distance between the inner wall horizontal surface of the lock hook and the bottom wall horizontal surface of the lock opening. This design ensures that the lock bolt first contacts the buffering block and buffers by the rubber elasticity of the buffering block, rather than directly impacting the bottom wall of the lock opening or the lock hook, thereby providing comprehensive protection for the key structures of the lock opening and the lock hook.

[0008] The buffering block has a radial cross-section in the shape of a "T" and a reset block extending from the bottom wall towards the bottom wall of the buffering groove, and the reinforcing structure comprises a buffering spring arranged in the buffering groove.

[0009] The beneficial effects of the above technical scheme are that: the buffering block has a radial cross-section in the shape of a "T", which makes the movement of the buffering block in the buffering groove more stable and less likely to deviate or shake, ensuring that it can accurately receive the impact force of the automobile lock bolt each time. The reset block extending from the bottom wall is connected to the buffering spring, and when the impact force of the lock bolt presses the buffering block and the buffering spring is compressed, the buffering spring can quickly push the reset block and drive the buffering block to return to the initial position, preparing for the next buffering and maintaining the continuous and stable working state of the seat back lock. The buffering spring in the reinforcing structure is located in the buffering groove and connected to the bottom wall of the buffering groove at one end and to the bottom wall of the reset block at the other end. When the automobile lock bolt impacts the buffering block, the buffering spring works together with the rubber buffering block. The rubber buffering block preliminarily absorbs and disperses the impact force, and the buffering spring further compresses and stores energy, complementing each other and greatly enhancing the overall buffering force, which effectively reduces the impact force of the lock bolt and significantly reduces the collision strength between the lock bolt and the lock opening and the lock leaf. Since the buffering block and the bottom wall of the buffering groove are in clearance fit, a reasonable space is reserved for the movement of the buffering block, and excessive shaking and friction of the buffering block are avoided to prevent unnecessary wear. At the same time, the buffering spring shares part of the impact force, reducing the load on the buffering block alone, slowing down the wear of the buffering block, the buffering groove and related components, prolonging the service life of the entire seat back lock buffering structure and reducing maintenance and replacement costs.

[0010] This utility model further includes: detachable vertical plates on both sides of the linkage block; each of the two vertical plates is bent towards the opening of the buffer groove with a baffle; the bottom wall of the baffle is in contact with the top wall of the buffer block; the two baffles are fitted together to form an insertion gap for an external car lock bolt to contact the top wall of the buffer block; the reinforcing structure also includes two guide springs, each corresponding to one of the two baffles; guide holes are provided on the buffer block corresponding to the positions of the two guide springs; the end of the guide spring is connected to the bottom wall of the adjacent and corresponding guide hole; the beginning of the guide spring is connected to the bottom wall of the baffle; the guide spring and the buffer spring are offset; and the guide spring and the guide hole are adapted to each other.

[0011] The advantages of adopting the above technical solution are: the detachable vertical plates on both sides of the linkage block and the bent baffles on the vertical plates together form a precise guiding structure. The insertion gap formed by the gap between the two baffles limits the path of the car bolt contacting the buffer block, ensuring that the bolt can accurately act on the top wall of the buffer block, avoiding weakening the buffering effect due to bolt position deviation, and making the buffering process more stable and reliable; in addition to the original buffer spring, the newly added guide spring further enriches the buffering system. When the car bolt is inserted, the guide spring and the buffer spring work together to disperse and absorb the impact force from different directions and dimensions. The buffer spring is responsible for the main buffering in the vertical direction, while the guide spring buffers and corrects the bolt's lateral offset or irregular impact force, reducing the energy generated by the collision in all directions and protecting key components such as the lock and the lock leaf to the greatest extent. One end of the guide spring is connected to the bottom wall of the baffle, and the other end is connected to the bottom wall of the guide hole of the buffer block. This connection method provides additional support for the buffer block, making it more evenly stressed when bearing impact force and reducing the risk of damage caused by local stress concentration. Meanwhile, the guide spring distributes some of the impact force, reducing the burden on the buffer block, which helps extend the service life of the buffer block, reduces the frequency of component replacement, and saves maintenance costs. The upright plate and the linkage block adopt a detachable connection method, which greatly improves the convenience of assembly and subsequent maintenance. Once a component (such as the baffle or guide spring) malfunctions or needs to be replaced or upgraded, the staff can easily disassemble the upright plate and quickly repair or replace the corresponding component without having to disassemble the entire seat back lock in a large-scale manner, shortening the repair time and improving the overall work efficiency.

[0012] The present invention further includes: a limiting hole through the reset block; a limiting shaft coaxially arranged on the bottom wall of the buffer groove corresponding to the position of the limiting hole for insertion into the limiting hole; the limiting shaft is made of wear-resistant rubber material and is adapted to the limiting hole; and a buffer spring is sleeved on the limiting shaft and is coaxially arranged with the limiting shaft.

[0013] The above technical scheme has the advantages that the limiting shaft is arranged to guide and limit the stretching direction of the buffer spring, so that the deformation and skew of the buffer spring can be avoided to prevent the buffer function from being invalid.

[0014] The utility model further sets up: the inside wall of lock hook is covered with sound-absorbing pad, sound-absorbing pad is made of rubber material.

[0015] The above technical scheme has the advantages that the sound-absorbing pad made of rubber material has excellent sound-absorbing and shock-absorbing characteristics, and it can convert mechanical energy generated by collision into heat energy or other forms of energy through elastic deformation in the moment of collision, thereby greatly reducing the impact sound, creating a more quiet and comfortable in-car environment, reducing the irritation of in-car personnel caused by noise, and providing a layer of protection for the lock hook while playing a sound-absorbing role. The automobile lock bolt frequently enters and exits the lock hook, which can easily scratch and wear the inner wall of the lock hook, and may affect the closing accuracy and service life of the lock hook over time. The rubber sound-absorbing pad is relatively soft and acts as a buffer layer, reducing the intensity of direct friction and collision between the lock bolt and the lock hook, effectively avoiding scratches, dents and other damage to the inner wall of the lock hook, maintaining the good mechanical properties of the lock hook, and prolonging the service life of the lock hook and even the entire seat back lock. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the utility model;

[0017] Figure 2 It is a partial three-dimensional view of Figure 1 ;

[0018] Figure 3 It is a partial sectional view of Figure 1 . DETAILED DESCRIPTION

[0019] The utility model provides a seat backrest lock, including lock body 1, the lock blade 11 of movable setting in lock body 1 and be used for with the lock blade 11 linkage cooperation to restrict the lock blade 11 activity lock plate 12, the lock body 1 is opened to insert the lock mouth 13 of outside world car lock bolt, the lock blade 11 is bent to have the lock hook 111 for closing lock mouth 13 opening in lock mouth 13 direction, the lock plate 12 is provided with the pressure rod 14 for when being under pressure, the lock blade 11 is driven and removes the activity restriction of lock blade 11 to the lock plate 12 activity, the lock body 1 is provided with reset structure for driving the lock blade 11 and the lock plate 12 activity reset, the lock body 1 outer wall is provided with linkage block 2 near lock mouth 13 position, linkage block 2 is provided with the buffer block 3 for reducing car lock bolt impact force and reducing the collision intensity between car lock bolt and lock mouth 13 inner peripheral wall and lock blade 11 when outside world car lock bolt inserts lock mouth 13 and the reinforcing structure for improving the buffer degree of buffer block 3 to outside world car lock bolt, the buffer groove 21 is opened in linkage block 2 along its height direction, the buffer groove 21 opening is set near lock mouth 13 position, the buffer block 3 is movably arranged in buffer groove 21, the buffer block 3 top wall horizontal plane is parallelly arranged with lock hook 111 inner wall horizontal plane, the interval between the buffer block 3 top wall horizontal plane and lock hook 111 inner wall horizontal plane is less than the interval between lock hook 111 inner wall horizontal plane and lock mouth 13 bottom wall horizontal plane, the buffer block 3 is made of rubber material, the buffer block 3 radial section is arranged as " T " character shape and its bottom wall extends reset block 31 towards buffer groove 21 bottom wall, the reinforcing structure includes the buffer spring 32 arranged in buffer groove 21, the buffer block 3 bottom wall is gap fit with buffer groove 21 bottom wall, the buffer spring 32 end is connected with buffer groove 21 bottom wall, the buffer spring 32 beginning is connected with reset block 31 bottom wall, the linkage block 2 both sides are detachably connected with vertical plate 22, two vertical plate 22 are all bent with baffle 221 towards buffer groove 21 opening, the baffle 221 bottom wall is in contact with buffer block 3 top wall and is set, two baffle 221 gap fit and form and insert the interval for outside world car lock bolt and buffer block 3 top wall contact, the reinforcing structure further includes two guide springs 222, two guide springs 222 and two baffles 221 are set one by one, the guide hole 33 is opened in buffer block 3 corresponding two guide springs 222 positions, the guide spring 222 end is connected with the bottom wall of adjacent and corresponding guide hole 33, the guide spring 222 beginning is connected with baffle 221 bottom wall, the guide spring 222 and buffer spring 32 are mispositioned, the guide spring 222 and guide hole 33 are adaptively set, the limit hole 311 is passed through on reset block 31, the limit shaft 312 is coaxially set for with limit hole 311 plug fit in buffer groove 21 bottom wall corresponding limit hole 311 position, the limit shaft 312 is made of wear -resisting rubber material and limit shaft 312 and limit hole 311 adaptively set,The buffer spring 32 is sleeved on the limiting shaft 312 and coaxially arranged with the limiting shaft 312, and the inner wall of the lock hook 111 is covered with a sound-absorbing pad 4 made of rubber material.

[0020] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A seat back lock, comprising a lock body, a lock leaf movably disposed in the lock body, and a locking plate for engaging with the lock leaf to restrict its movement, wherein the lock body has a lock opening for inserting an external car bolt, the lock leaf is bent toward the lock opening with a lock hook for closing the opening, the locking plate is provided with a pressure rod for moving the locking plate and releasing the restriction on the lock leaf's movement when pressed, and the lock body is provided with a reset structure for driving the lock leaf and the locking plate to reset, characterized in that: The linkage block is provided on the outer wall of the lock body near the lock hole position, and the linkage block is provided with a buffer block for reducing the impact force of the external automobile lock bolt and the collision strength between the automobile lock bolt and the inner wall of the lock hole and the lock leaf when the automobile lock bolt is placed in the lock hole, and a reinforcing structure for improving the buffering degree of the buffer block to the external automobile lock bolt.

2. A seat backrest lock according to claim 1, characterized in that: The buffer groove is opened at the opening near the lock hole position, the buffer block is movably arranged in the buffer groove, the top wall horizontal surface of the buffer block is arranged in parallel with the inner wall horizontal surface of the lock hook, the distance between the top wall horizontal surface of the buffer block and the inner wall horizontal surface of the lock hook is less than the distance between the inner wall horizontal surface of the lock hook and the bottom wall horizontal surface of the lock hole, and the buffer block is made of rubber material.

3. A seat backrest lock according to claim 2, characterised in that: The radial section of the buffer block is arranged in a "T" shape, and the bottom wall of the buffer block extends to the bottom wall of the buffer groove with a reset block, the reinforcing structure includes a buffer spring arranged in the buffer groove, the buffer block bottom wall and the buffer groove bottom wall are gap-fitted, the end of the buffer spring is connected with the buffer groove bottom wall, and the beginning of the buffer spring is connected with the bottom wall of the reset block.

4. A seat backrest lock according to claim 3, characterised in that: The two sides of the linkage block are detachably connected with vertical plates, the two vertical plates are bent with baffle plates towards the opening of the buffer groove, the bottom wall of the baffle plate is in contact with the top wall of the buffer block, the two baffle plates are gap-fitted and form a placement gap for the external automobile lock bolt to contact the top wall of the buffer block, the reinforcing structure further includes two guide springs arranged in the buffer block, the two guide springs are correspondingly arranged with the two baffle plates, the buffer block is provided with guide holes corresponding to the positions of the two guide springs, the end of the guide spring is connected with the bottom wall of the adjacent and corresponding guide hole, the beginning of the guide spring is connected with the bottom wall of the baffle plate, the guide spring is arranged in a staggered manner with the buffer spring, and the guide spring is matched with the guide hole.

5. A seat backrest lock according to claim 3, characterised in that: The reset block is provided with a limiting hole, the buffer groove bottom wall is coaxially provided with a limiting shaft for plug-in matching with the limiting hole at the position corresponding to the limiting hole, the limiting shaft is made of wear-resistant rubber material and is matched with the limiting hole, the buffer spring is sleeved on the limiting shaft and is coaxially arranged with the limiting shaft.

6. A seat backrest lock according to claim 1, characterized in that: The inner wall of the lock hook is covered with a sound-absorbing pad made of rubber material.

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