Self-locking seat back lock
By optimizing the coordination of the locking plate, stop plate, and locking leaf, and by adopting a noise reduction structure and a reset structure, the noise problem of traditional seat back locks has been solved, achieving improved quietness and stability, and enhancing passenger comfort and safety.
Patent Information
- Application Number
- CN202520120092.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-17
AI Technical Summary
When a traditional seat back lock resets, the locking leaf collides with the stop plate, generating significant noise and affecting passenger comfort and safety.
A self-locking seat back lock was designed. By optimizing the cooperation of the locking plate, the stop plate and the locking leaf, and adopting a noise reduction structure and a reset structure, including a limit protrusion, a matching protrusion, a torsion spring and a noise reduction pad, the lock leaf achieves a quiet effect and stability.
It significantly reduces noise during lock leaf reset, improves the stability and durability of the seat back lock, and enhances passenger comfort and safety.
Smart Images
Figure CN223605507U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to backrest lock technical field, concretely is a self -locking seat backrest lock. BACKGROUND
[0002] In the automobile seat design, the seat backrest lock is the key assembly of ensuring passenger comfort and safety, and the traditional seat backrest lock includes a shell, a cover plate, a pull rod and a rivet structure for connecting the shell and the cover plate, wherein the shell and the cover plate are provided with a lock leaf, a lock hook, a stop piece and a locking piece, the operator exposes the lock hook to the lock opening by pulling the pull rod, so that the automobile lock bolt can be placed in the lock opening, at this time, the reset structure between the shell and the cover plate can drive the lock leaf to reset and in turn drive the lock hook to close the lock opening, the traditional backrest lock realizes the fixation and limiting of the lock leaf through the cooperation of the stop piece and the locking piece after the reset of the lock leaf, and in turn avoids the lock hook from closing the lock opening due to the swing of the lock leaf when the vehicle is running, but the lock leaf and the stop piece will collide and contact when the lock leaf of the traditional backrest lock resets, which is easy to produce a large noise, affecting the passenger experience, and the lock hook and the automobile lock bolt and the lock leaf and the stop piece will frequently contact and knock when the automobile bounces, and in turn produce a large noise. SUMMARY
[0003] In view of the deficiencies in the prior art, the utility model provides a self-locking seat backrest lock to solve the problem of the collision and contact between the lock leaf and the stop piece when the lock leaf of the traditional backrest lock resets.
[0004] To achieve the above purpose, the utility model provides a self-locking seat backrest lock, which comprises a shell, a cover plate and first and second hollow rivets for connecting the shell and the cover plate, the locking piece and the stop piece are movably arranged on the first hollow rivet, the lock leaf is movably arranged on the second hollow rivet, the shell and the cover plate are both provided with a lock opening for placing the external automobile lock bolt, the reset structure for driving the locking piece, the stop piece and the lock leaf to rotate and reset is arranged between the shell and the cover plate, the lock hook for closing the opening of the lock opening is bent in the direction of the lock opening, the pull block for connecting with the external pull rod is arranged on the stop piece, the limiting structure for cooperating with the lock leaf to limit the movement of the lock leaf when the lock hook closes the lock opening is arranged on the stop piece, and the noise elimination structure for cooperating with the limiting structure to eliminate or reduce the noise generated by the cooperation of the stop piece and the lock leaf is arranged between the stop piece and the lock leaf.
[0005] The technical scheme has the beneficial effects that: through the cooperation of the locking piece, the stop piece and the lock leaf and the cooperation of the sound-damping structure and the limiting structure, the mute effect is realized when the lock leaf is reset, the working noise is significantly reduced, the comfort of passengers is improved, meanwhile, the design of the reset structure enables the lock leaf, the stop piece and the locking piece to be reset accurately, the stability and durability of the seat backrest lock are enhanced, in addition, the introduction of the sound-damping structure effectively eliminates the noise when the stop piece cooperates with the lock leaf, and the overall performance of the seat backrest lock is further improved.
[0006] The utility model further sets up: the lock leaf outer wall sets up the limit protruding, the limit protruding and lock leaf outer wall are smooth curved surface connection and form and abut on the surface, the limiting structure includes the stop hook for with abut on the surface local abut on cooperation when the lock leaf activity resets and cooperation protruding for with limit protruding abut on cooperation when the lock leaf activity resets, cooperation protruding and stop hook all set up in stop piece, cooperation protruding and stop hook between smooth arc surface connection and form and have the limit slot that limit protruding inserts, the reset structure includes setting first torsional spring and second torsional spring on first hollow rivet and setting third torsional spring on second hollow rivet, first torsional spring is connected with locking piece and first hollow rivet respectively and sets up, second torsional spring is connected with stop hook and first hollow rivet respectively and sets up, first torsional spring and second torsional spring all with first hollow rivet coaxial alignment sets up, third torsional spring is connected with lock leaf and second hollow rivet respectively and sets up.
[0007] The technical scheme has the beneficial effects that when the operator pulls the pull rod to unlock the automobile lock bolt, the operator pulls the pull rod to make the pull rod drive the stopper to swing through the pull block, and after the stopper swings by a certain angle, the locking piece swings synchronously, at this time, the limiting protrusion and the matching protrusion gradually separate, that is, the limiting protrusion no longer abuts against and is limited by the matching protrusion, so that the force generated by the deformation of the third torsional spring acts on the lock leaf and drives the lock leaf to swing, at this time, the outer peripheral wall of the lock leaf is in contact with the lock bolt and pushes the lock bolt out of the lock opening, so as to complete the unlocking; when the operator does not pull the pull rod and the automobile lock bolt is placed in the lock opening, the automobile lock bolt will press the outer peripheral wall of the lock leaf and apply a force to the lock leaf, and the force is greater than the force applied to the lock leaf by the third torsional spring, so that the lock leaf swings back and the third torsional spring deforms, and when the lock leaf swings back, the lock hook swings back synchronously and closes the opening of the lock opening, at the same time, the stopper is no longer subjected to the force applied by the operator, so that the force applied by the deformation of the first torsional spring acts on the locking piece and conducts part of the force to the stopper through the locking piece, and the force applied by the deformation of the second torsional spring acts on the stopper, the stopper swings back through the application of the two forces, and the limiting protrusion and the matching protrusion are in abutting and matching relationship, and the stopper hook and the abutting surface are in abutting and matching relationship, and the lock leaf is limited from swinging through the double abutting and limiting.
[0008] The utility model further sets up: the sound elimination structure includes first sound elimination pad and second sound elimination pad of setting on the abutting surface, first sound elimination pad and second sound elimination pad all are made of rubber material.
[0009] The technical scheme has the beneficial effects that when the operator pulls the pull rod to unlock the automobile lock bolt, the operator pulls the pull rod to make the pull rod drive the stopper to swing through the pull block, and after the stopper swings by a certain angle, the locking piece swings synchronously, at this time, the limiting protrusion and the matching protrusion gradually separate, that is, the limiting protrusion no longer abuts against and is limited by the matching protrusion, so that the force generated by the deformation of the third torsional spring acts on the lock leaf and drives the lock leaf to swing, at this time, the outer peripheral wall of the lock leaf is in contact with the lock bolt and pushes the lock bolt out of the lock opening, so as to complete the unlocking; when the operator does not pull the pull rod and the automobile lock bolt is placed in the lock opening, the automobile lock bolt will press the outer peripheral wall of the lock leaf and apply a force to the lock leaf, and the force is greater than the force applied to the lock leaf by the third torsional spring, so that the lock leaf swings back and the third torsional spring deforms, and when the lock leaf swings back, the lock hook swings back synchronously and closes the opening of the lock opening, at the same time, the stopper is no longer subjected to the force applied by the operator, so that the force applied by the deformation of the first torsional spring acts on the locking piece and conducts part of the force to the stopper through the locking piece, and the force applied by the deformation of the second torsional spring acts on the stopper, the stopper swings back through the application of the two forces, and the limiting protrusion and the matching protrusion are in abutting and matching relationship, and the stopper hook and the abutting surface are in abutting and matching relationship, and the lock leaf is limited from swinging through the double abutting and limiting.
[0010] The utility model further sets up: the second sound elimination pad is integrally connected with a plurality of second sound elimination teeth, and the second sound elimination teeth are gap matched and form sound elimination grooves, the second sound elimination teeth are arranged towards the stopper hook, and the second sound elimination teeth are uniformly arranged along the direction in which the lock leaf outer peripheral wall is opened, the first sound elimination pad extends in the direction of each sound elimination groove and is provided with first sound elimination teeth for locally engaging with the sound elimination groove when the stopper hook and the abutting surface are locally in abutting and matching relationship, and the first sound elimination teeth and the second sound elimination teeth are made of elastic rubber material.
[0011] The beneficial effects of the above technical solutions are that: when the first sound-absorbing pad and the second sound-absorbing pad are in contact or collide with each other, each first sound-absorbing tooth is inserted into the corresponding sound-absorbing groove, the noise generated is reduced through elastic cooperation, and the force generated by the collision or contact is reduced through the cooperation of the first sound-absorbing tooth and the second sound-absorbing tooth, so as to reduce the resonance force between the stop sheet and the lock leaf and the force borne by the lock leaf, thereby avoiding frequent swinging or vibration of the lock leaf to generate a large amount of noise.
[0012] The utility model further sets up: the third sound-absorbing pad is arranged on the limiting protrusion, and the third sound-absorbing pad is made of wear-resistant rubber material.
[0013] The beneficial effects of the above technical solutions are that: the third sound-absorbing pad is arranged to reduce the noise generated by the contact between the matching protrusion and the limiting protrusion, further achieving the purpose of sound absorption, thereby improving the sound absorption efficiency and strength.
[0014] The utility model further sets up: the fourth sound-absorbing pad is arranged on the inner circumferential wall of the lock hook and used for abutting against the outer circumferential wall of the automobile lock bolt, and the fourth sound-absorbing pad is made of wear-resistant rubber material.
[0015] The beneficial effects of the above technical solutions are that: the fourth sound-absorbing pad is arranged to reduce the noise generated by the collision or contact between the lock bolt and the lock hook when the automobile is running or jolting, thereby improving the sound absorption efficiency and strength. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a three-dimensional view of the utility model;
[0017] Figure 2 It is a three-dimensional view of the utility model after removing the shell;
[0018] Figure 3 It is a simple enlarged three-dimensional view of the utility model when the stop hook cooperates with the lock leaf. DETAILED DESCRIPTION
[0019] The utility model provides a self -locking seat backrest lock, including casing 1, apron 11 and be used for connecting casing 1 and apron 11's first hollow rivet 12 and second hollow rivet 13, the first hollow rivet 12 has the lock piece 21 and the stopper piece 2 of activity arrangement on, the second hollow rivet 13 has the lock leaf 3 of activity arrangement on, the casing 1 and apron 11 all are set up and have the lock mouth 14 of the outside car lock bolt of supply, between casing 1 and apron 11 is provided with the reset structure for driving lock piece 21, stopper piece 2 and lock leaf 3 respectively rotate reset, the lock leaf 3 is bent and has the lock hook 31 for closing the lock mouth 14 opening of the lock mouth 14 direction, the stopper piece 2 is provided with the pull block 22 for connecting with the outside pull rod, the stopper piece 2 is provided with the restriction structure for when the lock hook 31 closes the lock mouth 14 with lock leaf 3 cooperation to limit lock leaf 3 activity, the stopper piece 2 and lock leaf 3 between are provided with the silencing structure for restriction structure cooperation to eliminate or reduce the noise of stopper piece 2 and lock leaf 3 cooperation produces, the lock leaf 3 outer wall is provided with the limiting protrusion 32, the limiting protrusion 32 and lock leaf 3 outer wall are smooth curved surface connection and form and abut 33, the restriction structure includes for when lock leaf 3 activity reset with abut 33 local abutment cooperation's stopper hook 23 and for when lock leaf 3 activity reset with limiting protrusion 32 abutment cooperation's cooperation protrusion 24, the cooperation protrusion 24 and stopper hook 23 all are provided on the stopper piece 2, the cooperation protrusion 24 and stopper hook 23 between are smooth arc surface connection and form and have the limiting slot for limiting protrusion 32 placement, the reset structure includes setting on the first hollow rivet 12's first torsional spring 121 and second torsional spring 122 and setting on the second hollow rivet 13's third torsional spring 131, the first torsional spring 121 is connected with lock piece 21 and first hollow rivet 12 setting respectively, the second torsional spring 122 is connected with stopper hook 23 and first hollow rivet 12 setting respectively, the first torsional spring 121 and second torsional spring 122 all are coaxial with first hollow rivet 12 alignment setting, the third torsional spring 131 is connected with lock leaf 3 and second hollow rivet 13 setting respectively, the silencing structure includes setting on the first silencing pad 231 of stopper hook 23 outer wall and setting on the second silencing pad 331 of abut 33, the first silencing pad 231 and second silencing pad 331 all are made of rubber material, the second silencing pad 331 is integrally connected with a plurality of second silencing teeth 332, adjacent the second silencing tooth 332 gap cooperation and form have silencing groove 333, a plurality of second silencing teeth 332 are set towards stopper hook 23 and a plurality of second silencing teeth 332 are uniformly arranged along the lock leaf 3 outer wall opening direction, the first silencing pad 231 towards each silencing groove 333 direction all extend for when stopper hook 23 and abut 33 local abutment cooperation with silencing groove 333 local meshing's first silencing tooth 232, the first silencing tooth 232 and second silencing tooth 332 all are made of elastic rubber material, the limiting protrusion 32 is provided with the third silencing pad 34,The third sound-absorbing pad 34 is made of wear-resistant rubber material, the inner circumferential wall of the lock hook 31 is covered with a fourth sound-absorbing pad 35 for locally abutting against the outer circumferential wall of the external automobile lock bolt, and the fourth sound-absorbing pad 35 is made of wear-resistant rubber material.
[0020] The number of the first sound-absorbing teeth and the number of the second sound-absorbing teeth in the accompanying drawings are not limited, and the number can be reduced or increased according to actual operation requirements; meanwhile, the inclination angle, the number, the contact area, and the size of the first sound-absorbing teeth and the second sound-absorbing teeth are not limited, and the accompanying drawings only serve as an illustration.
[0021] 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-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, 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 for protection, and the scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A self-locking seat backrest lock, comprising a housing, a cover plate, and first and second hollow rivets for connecting the housing and the cover plate, a locking piece and a stop piece being movably arranged on the first hollow rivet, a lock leaf being movably arranged on the second hollow rivet, lock openings being formed in the housing and the cover plate for receiving external automobile lock bolts, reset structures being arranged between the housing and the cover plate for driving the locking piece, the stop piece and the lock leaf to rotate and reset respectively, a lock hook being bent on the lock leaf towards the lock opening for closing the opening of the lock opening, a pull block being arranged on the stop piece for connecting with an external pull rod, characterized in that: The stop piece is provided with a limiting structure for cooperating with the lock leaf to limit the movement of the lock leaf when the lock hook closes the lock port.
2. A self-latching seat backrest lock according to claim 1, characterized in that: The outer wall of the lock leaf is provided with a limiting protrusion which is connected with the outer wall of the lock leaf in a smooth curved surface and forms an abutting surface, the limiting structure includes a stop hook for locally abutting with the abutting surface when the lock leaf is reset and a cooperating protrusion for abutting with the limiting protrusion when the lock leaf is reset, the cooperating protrusion and the stop hook are both provided on the stop piece, the cooperating protrusion and the stop hook are connected in a smooth arc surface and form a limiting groove for the limiting protrusion, the reset structure includes a first torsion spring and a second torsion spring provided on the first hollow rivet and a third torsion spring provided on the second hollow rivet, the first torsion spring is connected with the locking piece and the first hollow rivet respectively, the second torsion spring is connected with the stop hook and the first hollow rivet respectively, the first torsion spring and the second torsion spring are coaxially aligned with the first hollow rivet, and the third torsion spring is connected with the lock leaf and the second hollow rivet respectively.
3. A self-latching seat backrest lock according to claim 2, characterized in that: The sound elimination structure includes a first sound elimination pad provided on the outer wall of the stop hook and a second sound elimination pad provided on the abutting surface, and the first sound elimination pad and the second sound elimination pad are both made of rubber material.
4. A self-latching seat backrest lock according to claim 3, characterized in that: The second sound elimination pad is integrally connected with a plurality of second sound elimination teeth, the adjacent second sound elimination teeth are gap-connected and form a sound elimination groove, a plurality of second sound elimination teeth are arranged towards the stop hook and a plurality of second sound elimination teeth are uniformly arranged along the direction in which the outer wall of the lock leaf is opened, the first sound elimination pad extends towards each sound elimination groove and is locally engaged with the sound elimination groove when the stop hook is locally abutted with the abutting surface, and the first sound elimination teeth and the second sound elimination teeth are both made of elastic rubber material.
5. A self-latching seat backrest lock according to claim 2, characterized in that: The limiting protrusion is provided with a third sound elimination pad, and the third sound elimination pad is made of wear-resistant rubber material.
6. A self-latching seat backrest lock according to claim 1, characterized in that: The inner circumferential wall of the lock hook is covered with a fourth sound elimination pad for locally abutting with the outer circumferential wall of the external automobile lock bolt, and the fourth sound elimination pad is made of wear-resistant rubber material.