Two-gear backrest lock
By incorporating damping and adjustment mechanisms into the locking hook, the problems of hook swaying and long-term wear during vehicle bumps are solved. This achieves stability and adjustable damping force in the locking hook, improving ride comfort and safety, extending service life, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520791613.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-24
AI Technical Summary
The traditional two-position backrest lock hook is prone to shaking or loosening when the car is bumpy. After long-term use, it may become loose due to wear and tear. In addition, the damping design cannot be adjusted according to actual needs, which affects the comfort and safety of the ride.
A damping structure and an adjustment structure are installed on the lock hook. The damping structure provides damping force to limit swaying, and the adjustment structure adjusts the magnitude of the damping force as needed. The damping head cooperates with the lock hook to compensate for the gap caused by wear and ensure the stability of the lock hook.
It effectively suppresses locking hook wobbling and loosening, improves riding comfort and safety, extends service life, meets the adjustment needs of different users, and reduces maintenance costs.
Smart Images
Figure CN223949020U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile parts, in particular to a two-gear backrest lock. BACKGROUND
[0002] In the automobile seat system, the backrest lock is an important part to ensure the comfort and safety of passengers. On the one hand, the hook of the traditional two-gear backrest lock is prone to shaking or loosening during the driving process, especially on bumpy roads, due to the vibration and impact of the road surface. The shaking of the hook not only produces an uncomfortable noise, affecting the passenger's riding experience, but also may cause the backrest angle to change unexpectedly, failing to provide stable support for passengers and reducing the safety of riding. On the other hand, with the increase of use time, the hook will inevitably wear out. The wear between the hook and other cooperating components will gradually increase the fitting clearance, causing the hook to loosen after long-term use. This not only affects the normal use of the backrest lock, but also may cause the backrest lock to fail, seriously threatening the safety of passengers. In addition, the damping design of the traditional backrest lock is usually fixed, which cannot be adjusted according to the actual use, and it is difficult to meet the diversified needs of different users for the backrest adjustment feel and stability. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a two-gear backrest lock to solve the problem of the hook of the traditional two-gear backrest lock shaking or loosening during the driving of the car and loosening due to wear after long-term use.
[0004] To achieve the above purpose, the utility model provides a two-gear backrest lock, which comprises a lock shell, the lock shell is provided with a lock slot for placing the external car lock bolt, the lock shell is movably provided with a lock hook and a locking piece, the lock hook is provided with a first slot for cooperating with the lock slot to form a first gear slot and a second slot for cooperating with the lock slot to form a second gear slot, the locking piece is provided at the end with a pull head for cooperating with the external car pull rod to release the locking of the lock hook when the pull rod drives the locking piece to swing, the lock shell is provided with a main shaft, the lock hook is movably arranged on the main shaft, the main shaft is provided with a damping structure for applying a damping force to the lock hook and an adjusting structure for cooperating with the damping structure to adjust the size of the damping force applied by the damping structure to the lock hook.
[0005] The technical scheme has the beneficial effects that: the damping structure is arranged on the main shaft, and the damping structure can apply damping force to the lock hook when the lock hook swings, so that the damping force can effectively limit the swing or loosening angle of the lock hook when the automobile travels on a bumpy road, prevent the lock hook from being displaced unexpectedly due to road vibration and impact, and enable the backrest to always maintain a stable angle, thereby providing reliable support for the passenger, eliminating noise caused by the swing of the lock hook, and greatly improving the riding comfort and safety of the passenger on a bumpy road; the adjusting structure can cooperate with the damping structure to adjust the damping force applied by the damping structure to the lock hook according to actual conditions, so that when the lock hook and other components have an increased cooperation gap due to wear during long-term use of the backrest lock, the damping force is increased by the adjusting structure to effectively compensate for the influence of wear, maintain the normal working state of the lock hook, and avoid the backrest lock failure caused by loosening; the adjusting structure enables the user to flexibly adjust the damping force when the lock hook swings according to the user's own use habits and actual needs, different users may have different preferences for the feel and stability of the backrest adjustment, and the damping force provided by the backrest lock can be adjusted, so that the diversified needs of the user can be met, and the user experience is further improved.
[0006] The utility model further sets up: the lock hook is equipped with the perforation that the main shaft passes through, the main shaft is passed through the adjusting hole along its length direction, the damping structure includes several damping head that sets up in the adjusting hole, the adjusting hole inner wall is equipped with several damping hole around, several damping head and several damping hole one to one and every damping head sets up in respective corresponding damping hole, the damping head beginning end partial penetration damping hole and with the inner wall abutment cooperation of the perforation setting, the damping head beginning end is made of rubber material.
[0007] The damping head of the damping structure is in abutting fit with the inner circumferential wall of the hook perforation, and the damping force generated by the abutting fit can effectively inhibit the swing of the hook and prevent the hook from shaking or loosening when the automobile bounces during driving, and since the adjusting structure can cooperate with the damping structure to adjust the damping force, when the user needs different backrest adjustment hand feeling, the damping force applied by the damping head to the hook can be adjusted through the adjusting structure, and after long-term use of the backrest lock, the hook and the main shaft and other components will be worn, resulting in an increase in the fit clearance. At this time, the position or state of the damping head can be adjusted through the adjusting structure to increase the damping force, compensate for the clearance caused by wear, maintain the normal working state of the hook, avoid the backrest lock from being disabled due to loosening, and prolong the service life of the backrest lock; by adjusting the damping force to compensate for wear, the service life of the hook, the main shaft and other key components is prolonged, the frequency of replacement due to premature damage of the components is reduced, the stability of the hook is improved, the wear compensation function is provided, the probability of failure of the backrest lock is reduced, the number of maintenance is reduced, and thus the overall maintenance cost is reduced.
[0008] The adjusting structure further comprises an adjusting shaft movably arranged in the adjusting hole, an adjusting ring is sleeved on the adjusting shaft, the shaft hole inner circumferential wall of the adjusting ring is in threaded connection with the outer circumferential wall of the adjusting shaft, the adjusting ring is coaxially connected with a rotating shaft for penetrating out of the adjusting hole, the rotating shaft forms a rotating end at the tail end for being rotated by an external operator, a limiting groove is annularly arranged on the inner circumferential wall of the adjusting hole, a limiting ring is annularly arranged on the outer circumferential wall of the rotating shaft, the limiting ring and the limiting groove are in plug fit and the limiting ring is movably arranged in the limiting groove, and the tail end of the adjusting shaft is in abutting fit with the tail end of the damping head.
[0009] The technical scheme has the beneficial effects that: the adjustment structure is arranged to enable the user to accurately adjust the damping force according to the user's preference and actual use demand for the backrest adjustment, the operator can drive the rotating shaft to rotate in the adjustment hole through the rotating end at the end of the rotating shaft, and the adjustment ring is synchronously rotated and drives the adjustment shaft to move along the axial direction of the adjustment hole in the adjustment hole due to the threaded connection between the adjustment shaft and the adjustment ring, the damping head end is extruded through the movement of the adjustment shaft to realize the change of the damping force, the adjustment shaft can accurately transmit the force to the damping head to realize the effective adjustment of the damping force, the stability of the entire backrest lock structure is further improved, thereby realizing the flexible adjustment of the swing damping force of the lock hook; the limiting ring on the adjustment ring is inserted and arranged with the limiting groove on the inner wall of the adjustment hole, and the limiting ring is movable in the limiting groove, so that the adjustment ring cannot move along the axial direction of the adjustment hole when the adjustment ring is rotated and threaded with the adjustment shaft, that is, the radial deviation or disengagement of the adjustment ring in the rotating process is prevented, and the stability and reliability of the adjustment structure are ensured; the design of the adjustment structure enables the operator to easily realize the adjustment of the damping force through the rotating end at the end of the rotating shaft, the operation mode is simple and intuitive, and no complex tools or professional skills are required.
[0010] The utility model further sets up: the adjustment shaft end is conical and is formed with first abutting face, the damping head end face and the damping head outer wall between smooth curved surface connection and are formed with second abutting face, a plurality of second abutting face all with first abutting face abut and cooperate setting.
[0011] The technical scheme has the beneficial effects that: in the above technical scheme, the tapered first abutting surface at the end of the adjusting shaft and the smooth curved second abutting surface of the damping head form an inclined surface cooperation, when the adjusting shaft moves along the axial direction, the radial force of the tapered surface uniformly pushes all the damping heads to expand or contract synchronously, the linear motion of the adjusting shaft is converted into the radial displacement of the damping head, and the linear and accurate adjustment of the damping force is realized through the mechanical amplification of the slope of the inclined surface, for example, when the shaft is rotated clockwise, the tapered end pushes forward, the damping head slides in the damping hole due to the extrusion of the inclined surface, that is, the damping force is applied to the inner wall of the hole through the initial end of the damping head, the abutting force between the damping head and the inner wall of the hole is increased, and the damping force is increased, when the shaft is rotated counterclockwise, the damping head slides back under the action of the reset force (the initial end of the damping head is elastically reset due to the influence of the material of the damping head), and the damping force is reduced; compared with the planar abutting, the tapered inclined surface cooperation can realize significant change of the damping force through smaller axial displacement, the adjustment sensitivity is higher, and the jamming or eccentric wear of the damping head caused by uneven force is avoided, the smooth curved second abutting surface at the end of the damping head is completely matched with the tapered first abutting surface, the stress concentration problem caused by the traditional right-angle abutting is eliminated, the pushing force of the adjusting shaft can be uniformly transmitted to each damping head, synchronous action of the damping heads is ensured, the single damping head is prevented from being worn out in advance due to excessive force, and then the consistency of the circumferential damping force of the lock hook is ensured, and the inclination or shaking of the lock hook caused by local insufficient damping is prevented.
[0012] The utility model further sets up: first reset torsional spring is connected between the main shaft and the lock hook, the sub shaft is in -line in the lock shell, the lock piece is movably arranged on the sub shaft and is connected with the second reset torsional spring between the sub shaft.
[0013] The beneficial effects of the above technical scheme are that: the existence of the first reset torsional spring makes the lock hook automatically return to the initial position after completing a swing action, when the user adjusts the backrest angle and the lock hook swings, the first reset torsional spring generates a corresponding torsional force, and after the adjustment action is completed, the torsional force drives the lock hook back to the original position, so that the lock hook can accurately cooperate with the lock groove and be prepared for the next locking operation; and the second reset torsional spring makes the lock piece quickly return to the original limiting position after being driven to swing by the automobile drag rod and being released from limiting the lock hook, when the operator pulls the drag rod to make the lock piece swing and unlock, the second reset torsional spring is twisted and stored, after the drag rod is released, the torsional spring releases energy, so that the lock piece quickly resets and limits the lock hook again, and the locking state of the backrest lock is maintained.
[0014] The utility model further sets up: first protruding portion is set up on the lock hook outer wall near first slot position, second protruding portion is set up on the lock hook outer wall near second slot position, first cooperation portion that is used for abutting with first protruding portion when first slot and lock slot cooperate and form first gear slot is arranged on the lock piece, second cooperation portion that is used for abutting with second protruding portion when second slot and lock slot cooperate and form second gear slot is arranged on the lock piece.
[0015] The beneficial of the above technical scheme is: the first protruding portion and the second protruding portion on the lock hook correspond to the first gear and the second gear respectively, when the lock hook rotates to the slot and the lock slot cooperate and form the gear, the first cooperation portion and the second cooperation portion of the lock piece abut with the corresponding protruding portion respectively, form rigid mechanical limit: 1, in the first gear, the first cooperation portion clamps the first protruding portion, limit the lock hook swing to non-gear direction;2, in the second gear, the second cooperation portion clamps the second protruding portion, and the locking position is the same. Through the setting of the above technology, avoid the "gear drift" problem caused by the fuzzy limit structure of the traditional backrest lock, ensure that the lock hook can only be locked at two preset angles stably, even if the car is jolted or vibrates for a long time, the rigid abutment of the protruding portion and the cooperation portion can prevent the lock hook from shaking in the non-gear interval, improve the positioning accuracy and reliability of the backrest angle adjustment, and then realize the two-gear locking function. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is three-dimensional view of the utility model;
[0017] Figure 2 It is three-dimensional view of the utility model after removing part of the lock shell structure;
[0018] Figure 3 It is the explosion three-dimensional view of the main shaft and its linkage structure in the utility model;
[0019] Figure 4 It is the simple sectional view schematic drawing of the main shaft and its linkage structure in the utility model. DETAILED DESCRIPTION
[0020] The utility model provides a two -gear backrest lock, including lock shell 1, the lock shell 1 is equipped with the lock slot 11 of the outside car lock bolt of being inserted, the lock hook 2 and locking piece 3 are movably arranged in the lock shell 1, the first slot 21 that is used for cooperating with the lock slot 11 to form the first gear slot 211 and the second slot 22 that is used for cooperating with the lock slot 11 to form the second gear slot 221 are equipped with in the lock hook 2, the locking piece 3 end is provided with the pull head 31 for cooperating with the outside car pull rod to make locking piece 3 remove the location of lock hook 2 when pull rod drives locking piece 3 to swing, the lock shell 1 is passed through the main shaft 12, the lock hook 2 is movably arranged on the main shaft 12, the main shaft 12 is provided with the damping structure for applying damping force to the lock hook 2 and the adjusting structure for cooperating with the damping structure to adjust the damping force size that the damping structure applies to the lock hook 2, the lock hook 2 is equipped with the perforation 23 for the main shaft 12 to pass through, the main shaft 12 is passed through along its length direction and is equipped with the adjusting hole 121, the damping structure includes several damping heads 13 movably arranged in the adjusting hole 121, the adjusting hole 121 inner wall is circumferentially equipped with several damping holes 132, several damping heads 13 and several damping holes 132 one to one and each damping head 13 movably arranged in the respective corresponding damping hole 132, the damping head 13 beginning end partially penetrates damping hole 132 and is arranged with the inner wall abutment of perforation 23, the damping head 13 beginning end is made of rubber material, the adjusting structure includes the adjusting shaft 4 movably arranged in the adjusting hole 121, the adjusting ring 41 is sleeved on the adjusting shaft 4, the shaft hole inner wall of adjusting ring 41 and adjusting shaft 4 outer wall are threadedly connected and arranged, the adjusting ring 41 is coaxially connected with the rotating shaft 42 for passing out the adjusting hole 121, the rotating shaft 42 end forms the rotating end 421 for the outside operator to rotate, the adjusting hole 121 inner wall is circumferentially equipped with the limit groove 122, the rotating shaft 42 outer wall is circumferentially equipped with the limit ring 422, the limit ring 422 and limit groove 122 insert fit arrangement and limit ring 422 movably arranged in the limit groove 122, the adjusting shaft 4 end and several damping head 13 end abutment and arrangement, the adjusting shaft 4 end is taper setting and forms the first abutment surface 43, the damping head 13 end surface and damping head 13 outer wall between smooth curved surface connection and forms the second abutment surface 131, several second abutment surfaces 131 all with the first abutment surface 43 abutment and arrangement, the main shaft 12 and lock hook 2 are connected with the first reset torsion spring 14, the lock shell 1 is passed through the auxiliary shaft 32, the locking piece 3 is movably arranged on the auxiliary shaft 32 and is connected with the second reset torsion spring 321 between the auxiliary shaft 32, the lock hook 2 outer wall is provided with the first protruding portion 24 near the first slot 21 position, the lock hook 2 outer wall is provided with the second protruding portion 25 near the second slot 22 position, the locking piece 3 is provided with the first cooperation part 33 for abutting with the first protruding portion 24 when the first slot 21 and the lock slot 11 cooperate to form the first gear slot 211,The locking sheet 3 is provided with a second matching part 34 for abutting against the second protruding part 25 when the second slot 22 and the locking slot 11 form the second gear slot 221.
[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 for illustrating 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 for protection, and the protection scope of the utility model is defined by the appended claims and equivalents thereof.
Claims
1. A two-position backrest lock, comprising a lock housing, wherein the lock housing has a lock groove for inserting an external car locking bolt, a lock hook and a locking plate are movably disposed in the lock housing, the lock hook has a first slot for cooperating with the lock groove to form a first position groove and a second slot for cooperating with the lock groove to form a second position groove, the locking plate has a pull head at its end for cooperating with an external car pull rod to release the locking plate from limiting the lock hook when the pull rod drives the locking plate to swing, a main shaft passes through the lock housing, and the lock hook is movably disposed on the main shaft, characterized in that: The main shaft is provided with a damping structure for applying damping force to the lock hook and an adjusting structure for cooperating with the damping structure to adjust the damping force applied by the damping structure to the lock hook.
2. A two-stage backrest lock according to claim 1, characterized in that: The lock hook is provided with a through hole for the main shaft to pass through, the main shaft is provided with an adjusting hole along the length direction of the main shaft, the damping structure comprises a plurality of damping heads movably arranged in the adjusting hole, a plurality of damping holes are annularly arranged on the inner wall of the adjusting hole, the plurality of damping heads and the plurality of damping holes are one-to-one corresponding, and each damping head is movably arranged in the corresponding damping hole, the damping head is partially arranged outside the damping hole and abuts against the inner wall of the through hole, and the damping head is made of rubber material.
3. A two-stage backrest lock according to claim 2, characterized in that: The adjusting structure comprises an adjusting shaft movably arranged in the adjusting hole, the adjusting shaft is provided with an adjusting ring, the inner wall of the shaft hole of the adjusting ring is threadedly connected with the outer wall of the adjusting shaft, the adjusting ring is coaxially connected with a rotating shaft for passing out of the adjusting hole, the rotating shaft is provided with a rotating end for being rotated by an external operator, the inner wall of the adjusting hole is annularly provided with a limiting groove, the outer wall of the rotating shaft is annularly provided with a limiting ring, the limiting ring is inserted and arranged in the limiting groove, and the outer wall of the adjusting shaft is abutted and arranged with the plurality of damping heads.
4. A two-stage backrest lock according to claim 3, characterised in that: The end of the adjusting shaft is conical and is provided with a first abutting surface, the end surface of the damping head is connected with the outer wall of the damping head in a smooth curved surface and is provided with a second abutting surface, and the plurality of second abutting surfaces are abutted and arranged with the first abutting surface.
5. A two-stage backrest lock according to claim 1, characterized in that: The main shaft and the lock hook are connected with a first reset torsion spring, the lock shell is provided with a secondary shaft, and the locking piece is movably arranged on the secondary shaft and is connected with a second reset torsion spring.
6. A two-stage backrest lock according to claim 1, characterized in that: The outer wall of the lock hook is provided with a first protruding portion near the first slot, the outer wall of the lock hook is provided with a second protruding portion near the second slot, the locking piece is provided with a first matching portion for abutting with the first protruding portion when the first slot and the lock slot cooperate to form a first gear slot, and the locking piece is provided with a second matching portion for abutting with the second protruding portion when the second slot and the lock slot cooperate to form a second gear slot.