Self-locking armrest lock

Abstract

The utility model discloses a self-locking handrail lock which comprises a bottom plate and a clamping plate, the bottom plate is provided with a through hole allowing an external handrail rotating shaft to penetrate through, the inner wall of the bottom plate is movably provided with a locking plate and two locking gears, the two locking gears are oppositely arranged, and a movable gap allowing the locking plate to slide is formed between the two locking gears. The top wall and the bottom wall of the locking plate are provided with matched insections in the length direction of the locking plate, the two locking gears correspond to the two matched insections in a one-to-one mode and are locally meshed with the two matched insections, the clamping plate is provided with a locking groove allowing the initial end of the locking plate to be placed in, the tail end of the locking plate is provided with a pull hole used for being connected with an external pull wire, and a limiting plate is vertically arranged on the bottom plate. The inner wall of the limiting plate and the tail end of the locking plate are connected with a return spring used for driving the locking plate to slide and reset. The utility model solves the problems in the prior art that a large amount of noise is generated due to collision between the locking pin and the clamping plate and the service lives of the locking pin and the clamping plate are shortened because the shaking quantity between the locking pin and the clamping plate is large.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a self-locking armrest lock. Background Art

[0002] At present, with the research and development and innovation of automobiles, armrests will be provided on some automobile seats. Especially for automobiles with large rear space, a central armrest will be provided in the middle position of the rear seat backrest. When in use, the armrest can be folded or lowered according to usage needs. The central armrest is composed of an armrest frame, an armrest shaft, a clamping plate arranged on the armrest shaft, a locking pin and a pull wire arranged on the armrest frame. When the central armrest rotates, the armrest frame rotates relative to the axis direction of the armrest shaft and pulls the pull wire to achieve locking cooperation between the locking pin and the clamping plate.

[0003] At present, most of the central armrests of the rear seats are locked in the folded state by the clamping cooperation between the clamping plate on the armrest frame and the locking pin. However, the locking structure formed by the combination of the locking pin and the clamping plate is affected by the manufacturing precision and assembly precision, which makes the locking pin have a large amount of shaking. At the same time, during the driving of the car, the locking pin is affected by the force caused by the bumps of the car, which will amplify the shaking amount between the locking pin and the clamping plate, resulting in collisions between the locking pin and the clamping plate, which makes a lot of noise. At the same time, long-term shaking or collisions will easily lead to a decrease in the service life of the locking pin and the clamping plate, and will also affect the use experience of the seat. Summary of the invention

[0004] In view of the shortcomings of the prior art, the utility model provides a self-locking armrest lock to solve the problems in the prior art that the large amount of shaking between the locking pin and the card plate causes a lot of noise due to collision between the locking pin and the card plate, and the service life of the locking pin and the card plate is reduced.

[0005] To achieve the above-mentioned purpose, the utility model provides a self-locking armrest lock, including a base plate for being installed on an external armrest frame and a clamping plate for being fixedly connected to an external armrest rotating shaft, the base plate is provided with a through hole for the external armrest rotating shaft to pass through, a locking plate and two locking gears are movably arranged on the inner wall of the base plate, the two locking gears are arranged opposite to each other and a movable gap is formed between the two for the locking plate to slide, the top wall and the bottom wall of the locking plate are provided with matching teeth along the length direction of the locking plate, the two locking gears correspond to the two matching teeth one by one and are partially meshed, the clamping plate is provided with a locking groove for the starting end of the locking plate to be inserted, the end of the locking plate is provided with a pulling hole for connecting with an external pull wire, a limiting plate is vertically arranged on the base plate, and a return spring for driving the locking plate to slide and reset is connected to the inner wall of the limiting plate and the end of the locking plate

[0006] The advantages of adopting the above technical solution are: when the user swings the car armrest, the car armrest rotates relative to the armrest shaft, so that the armrest frame drives the base plate to rotate along the axis direction of the armrest shaft. At this time, the pull wire on the armrest frame pulls and drives the locking plate to slide on the base plate, so that the end of the locking plate is separated from the clamping plate. When the car armrest is swung to the highest point, that is, in the retracted state, the pull wire is no longer pulled, so that the locking plate slides back on the base plate under the influence of the return spring. When the car armrest is swung to the highest point, the starting end of the locking plate is opposite to the opening of the locking groove, and when the locking plate is returned by the force applied by the return spring, the starting end of the locking plate is inserted into the locking groove, thereby realizing the locking cooperation between the locking plate and the clamping plate, thereby realizing the locked state when the armrest is retracted: the two locking gears in the above technology are provided to lock The plate is positioned and slidingly guided, and the longitudinal shaking amplitude of the locking plate on the card plate is limited by two locking gears, so as to reduce the shaking amount between the locking plate and the card plate, and the two locking gears are meshed with the matching tooth patterns on the locking plate to limit the horizontal shaking amplitude of the locking plate on the card plate, thereby reducing the shaking amount between the locking plate and the card plate, and at the same time, the damping when the locking gear rotates can be limited, that is, the resistance when the locking gear rotates is increased to ensure that the locking plate will not be easily driven to slide on the bottom plate when the car is bumpy, and the locking plate is prevented from being separated from the locking groove, so as to improve the locking strength when the armrest is folded; in the above-mentioned technology, the return spring is set, so that the automatic return of the locking plate can be realized, and the locking cooperation between the locking plate and the locking groove can be maintained when the armrest is folded, that is, the stability of the armrest locking can be ensured.

[0007] The utility model is further provided with: a rotating shaft is connected between the two locking gears and the bottom plate, the locking gear is rotatably arranged on the rotating shaft, and a return torsion spring for driving the locking gear to rotate and reset is arranged on the rotating shaft.

[0008] The benefits of adopting the above technical solution are: in the above technology, the locking gear is rotatably arranged on the rotating shaft to ensure its rotation direction and rotation accuracy, and at the same time, the return torsion spring is arranged to drive the locking plate to return when the pull rod is not pulled, that is, the mechanical force generated by the return torsion spring is applied to the locking plate so that it always applies a certain force in the direction of the card plate, to ensure that the locking plate will not easily slide on the bottom plate when the car is bumpy, to prevent the locking plate from detaching from the locking groove, thereby improving the locking strength when the armrest is folded, to limit the horizontal shaking amplitude of the locking plate on the card plate, and thereby reduce the shaking amount between the locking plate and the card plate.

[0009] The utility model is further configured as follows: a main shaft is arranged on the card plate, and openings for the external armrest rotating shaft to pass through are penetrated on the card plate and the main shaft, the radial cross-section of the card plate is fan-shaped and a locking groove is arranged on its arc surface, the radial cross-section of the main shaft is circular, a locking groove is arranged on the outer peripheral wall of the main shaft, and a locking plate is attached to the locking plate for partially inserting into the locking groove when the starting end of the locking plate is plugged into the locking groove.

[0010] The benefits of adopting the above technical solution are: in the above technology, when the locking groove and the locking plate cooperate, the locking groove will cooperate synchronously with the locking plate, thereby improving the locking strength when the armrest is folded, and at the same time, the setting of the locking groove and the locking groove can effectively reduce the amount of shaking when the armrest is locked; in the above technology, the radial cross-section of the card plate is fan-shaped, that is, the card plate is a fan-shaped plate, and the radial cross-section of the main shaft is circular, so that when the armrest is changed from a folded state to a flat state, the locking plate will disengage from the locking groove and contact the outer peripheral wall of the main shaft, and move along the outer peripheral wall of the main shaft, that is, the stability of the armrest when it is folded and laid flat is improved, and at the same time the size of the main shaft is reduced, which is conducive to its arrangement inside the armrest, reducing the space occupancy and improving space utilization.

[0011] The utility model is further configured that: the clamping plate, the main shaft, the locking plate and the locking plate are all wrapped with a plastic coating layer through a plastic coating process.

[0012] The benefits of adopting the above technical solution are: in the above technology, the clamping plate, main shaft, locking plate and locking plate are all wrapped with a plastic coating layer through a plastic coating process. The setting of the plastic coating layer reduces the noise generated when the locking plate and the locking plate are locked together, as well as the noise generated by the locking plate and the locking plate when the car is in a bumpy state or while the car is driving.

[0013] The utility model is further configured as follows: one end of the return spring is abutted against the inner wall of the limit plate, and the other end is abutted against the end of the locking plate, the top wall and the bottom wall of the locking plate are both provided with guide plates, a return spring is connected between the end of the locking plate and the inner wall of the limit plate, the return spring is coaxially arranged with the return spring and the diameter of the return spring is larger than the diameter of the return spring, the two guide plates are both provided with hooks, and the two hooks are respectively hooked and cooperated with a single coil in the return spring.

[0014] The benefits of adopting the above technical solution are: the setting of the return spring in the above technology is used to improve the return ability of the locking plate, and at the same time, the locking plate is hooked and cooperated with the return spring through a hook, so as to improve the smoothness and efficiency of the return spring when driving the locking plate to return, and at the same time, the diameter of the return spring is larger than the diameter of the return spring, so that the return spring is sleeved on the return spring, thereby limiting the telescopic position of the return spring, and further limiting the shaking amount and telescopic direction of the locking plate.

[0015] The utility model is further provided with: a guide hole for passing an external pull wire is opened on the limit plate, and the guide hole is coaxially arranged with the return spring.

[0016] The benefit of adopting the above technical solution is that the guide hole in the above technology is set to guide the pulling direction of the pull wire to pull the locking plate when the armrest frame rotates, thereby ensuring that the pull wire can correctly pull the locking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional view of the locked state of the utility model;

[0018] Figure 2 It is a three-dimensional view of the utility model in an unlocked state;

[0019] Figure 3 It is a three-dimensional view of the locking gear in the utility model. DETAILED DESCRIPTION

[0020] The utility model provides a self-locking handrail lock, comprising a base plate 1 for being installed on an external handrail frame and a clamping plate 2 for being fixedly connected to an external handrail rotating shaft, the base plate 1 is provided with a through hole for the external handrail rotating shaft to pass through, a locking plate 3 and two locking gears 12 are movably arranged on the inner wall of the base plate 1, the two locking gears 12 are arranged opposite to each other and a movable gap for the sliding of the locking plate 3 is formed between the two, matching tooth patterns 31 are arranged on the top wall and the bottom wall of the locking plate 3 along the length direction of the locking plate 3, the two locking gears 12 correspond to the two matching tooth patterns 31 one by one and partially mesh with each other The locking plate 3 is combined with the locking plate 2, and a locking groove 21 for inserting the starting end of the locking plate 3 is provided on the card plate 2, and a pulling hole 32 for connecting with an external pull wire is opened at the end of the locking plate 3. A limit plate 4 is vertically arranged on the base plate 1, and a return spring 33 for driving the locking plate 3 to slide and reset is connected to the inner wall of the limit plate 4 and the end of the locking plate 3. The two locking gears 12 are connected to the base plate with a rotating shaft 13, and the locking gear 12 is rotatably arranged on the rotating shaft 13, and a return torsion spring 11 for driving the locking gear 12 to rotate and reset is arranged on the rotating shaft 13. A main shaft 22 is arranged on the card plate 2, and the The card plate 2 and the main shaft 22 are penetrated with openings for the external handrail shaft to pass through. The radial cross-section of the card plate 2 is fan-shaped and the locking groove 21 is opened on its arc surface. The radial cross-section of the main shaft 22 is circular. A locking groove 221 is opened on the outer peripheral wall of the main shaft 22. A locking plate 34 is attached to the locking plate 3 for partially inserting the locking groove 221 when the starting end of the locking plate 34 is plugged into the locking groove 21. The card plate 2, the main shaft 22, the locking plate 34 and the locking plate 3 are all wrapped with a plastic layer through a plastic coating process. One end of the return spring 33 is arranged in contact with the inner wall of the limit plate 4. The other end is arranged in abutment with the end of the locking plate 3, and the top wall and bottom wall of the locking plate 3 are both provided with guide plates 35. A reset spring 41 is connected between the end of the locking plate 3 and the inner wall of the limiting plate 4. The reset spring 41 is coaxially arranged with the return spring 33 and the diameter of the reset spring 41 is larger than the diameter of the return spring 33. The two guide plates 35 are both provided with hooks 36, and the two hooks 36 are respectively hooked and cooperated with a single coil in the reset spring 41. A guide hole 42 for the external pull wire to pass through is opened on the limiting plate 4, and the guide hole 42 is coaxially arranged with the return spring 33.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A self-locking handrail lock, comprising a base plate for mounting on an external handrail frame and a clamping plate for being fixedly connected to an external handrail shaft, wherein a through hole is provided on the base plate for the external handrail shaft to pass through, and characterized in that: A locking plate and two locking gears are movably arranged on the inner wall of the base plate, the two locking gears are arranged opposite to each other and a movable gap is formed between them for the locking plate to slide, the top wall and the bottom wall of the locking plate are provided with matching teeth along the length direction of the locking plate, the two locking gears correspond to the two matching teeth one by one and are partially meshed, the card plate is provided with a locking groove for the starting end of the locking plate to be inserted, the end of the locking plate is provided with a pulling hole for connecting with an external pull wire, a limiting plate is vertically arranged on the base plate, and a return spring for driving the locking plate to slide and reset is connected to the inner wall of the limiting plate and the end of the locking plate.

2. A self-locking handrail lock according to claim 1, characterized in that: A rotating shaft is connected between the two locking gears and the base plate. The locking gears are rotatably arranged on the rotating shaft, and a return torsion spring for driving the locking gears to rotate and reset is arranged on the rotating shaft.

3. A self-locking handrail lock according to claim 1, characterized in that: A main shaft is arranged on the card plate, and openings for the external armrest rotating shaft to pass through are penetrated on the card plate and the main shaft. The radial cross-section of the card plate is fan-shaped and a locking groove is arranged on its arc surface. The radial cross-section of the main shaft is circular, and a locking groove is arranged on the outer peripheral wall of the main shaft. A locking plate is attached to the locking plate for partially inserting into the locking groove when the starting end of the locking plate is plugged into the locking groove.

4. A self-locking handrail lock according to claim 3, characterized in that: The clamping plate, the main shaft, the locking plate and the locking plate are all wrapped with a plastic layer through a plastic coating process.

5. The self-locking handrail lock according to claim 1, characterized in that: One end of the return spring is abutted against the inner wall of the limit plate, and the other end is abutted against the end of the locking plate. The top wall and the bottom wall of the locking plate are both provided with guide plates. A return spring is connected between the end of the locking plate and the inner wall of the limit plate. The return spring is coaxially arranged with the return spring and the diameter of the return spring is larger than the diameter of the return spring. Both guide plates are provided with hooks, and the two hooks are respectively hooked and cooperated with a single coil in the return spring.

6. A self-locking handrail lock according to claim 1, characterized in that: The limit plate is provided with a guide hole for the external pull wire to pass through, and the guide hole is coaxially arranged with the return spring.

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