Car seat armrest locking mechanism and car rear seat and car

Abstract

The present invention provides a car seat armrest locking mechanism, a car rear seat, and a car. The car seat armrest locking mechanism of the present invention includes a base plate and a clamping plate, as well as a brake hook, a clamping claw, and a limit plate. The clamping plate is provided with a first sector plate and a second sector plate. The first sector plate is provided with a first locking groove, the second sector plate is provided with a second locking groove, the clamping claw is provided with a locking tooth, and the limit plate is provided with a limit tooth. When the armrest is retracted, the locking tooth is embedded in the first locking groove, and the limit tooth is embedded in the second locking groove, thereby locking the armrest. When the brake hook is driven to rotate by an external force, the armrest can be unlocked. When the unlocked armrest rotates, the locking tooth can slide along the first sector plate, and the limit tooth can slide along the second sector plate. The car seat armrest locking mechanism of the present invention can improve the locking strength of the armrest when it is retracted, and can improve the smoothness of the movement of the armrest when it is deployed and retracted, thereby improving the overall usability of the car seat.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile seats, and in particular to an automobile seat armrest locking mechanism. The present invention also relates to an automobile rear seat using the above-mentioned automobile seat armrest locking mechanism, and an automobile equipped with the automobile rear seat. Background Art

[0002] In the prior art, some car seats are provided with armrests, especially for rear seats. Most rear seat backrests are provided with a center armrest in the middle of the backrest. When the car is in use, the center armrest can be unfolded to allow the passenger to relax their arms, and can also be folded to accommodate a third passenger.

[0003] Currently, most rear seat center armrests are locked in the retracted position using a locking pin. In some locking mechanisms, the locking pin is located at the center armrest's pivot point, and the locking pin, which extends from the armrest, engages with a hole in the external mounting bracket to achieve locking. This locking mechanism is affected by manufacturing and assembly precision, resulting in significant wobble in the locking pin, especially at the far end of the center armrest, where the wobble is significantly amplified. This can affect the seat's user experience and hinder overall seat quality.

[0004] In some other locking structures, a locking pin is located on the side of the rear seatback, with a built-in hook at the far end of the center armrest relative to the center armrest's rotation axis. When the center armrest is retracted, the hook and pin engage to lock the seat. This locking structure requires a hole in the center armrest surface to achieve the locking hook and pin, and the hook and pin are easily exposed after locking. This also affects the overall appearance of the rear seat and is not conducive to improving the overall usability of the seat. Summary of the Invention

[0005] In view of this, the present invention aims to provide a locking mechanism for an armrest of a car seat, so as to improve the overall usability of the seat.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A car seat armrest locking mechanism comprises a base plate fixedly connected to an armrest frame and rotatably mounted on an armrest shaft, a clamping plate fixedly connected to the armrest shaft, a brake hook and a claw rotatably connected to the base plate, and a limit plate connected to the claw, wherein the limit plate and the claw rotate about the same axis;

[0008] The clamping plate is provided with a first sector plate and a second sector plate arranged radially along the armrest shaft, the radius of the first sector plate is larger than that of the second sector plate, and the first sector plate is provided with a first locking groove, the second sector plate is provided with a second locking groove, the clamping claw is provided with a locking tooth, and the limiting plate is provided with a limiting tooth;

[0009] When the armrest is folded, the locking tooth is embedded in the first locking groove, and the limiting tooth is embedded in the second locking groove to lock the armrest;

[0010] When the brake hook is driven to rotate by an external force, the brake hook can drive the locking tooth to disengage from the first locking groove, and the limiting tooth to disengage from the second locking groove, so as to unlock the armrest;

[0011] When the armrest rotates after being unlocked, the locking teeth can slide along the outer peripheral wall of the first sector plate, and the limiting teeth can slide along the outer peripheral wall of the second sector plate.

[0012] Furthermore, the central angle of the first fan-shaped plate is smaller than that of the second fan-shaped plate, and when the armrest rotates after being unlocked, the locking tooth first slides along the outer peripheral wall of the first fan-shaped plate, and after the locking tooth disengages from the outer peripheral wall of the first fan-shaped plate, the limiting tooth slides along the outer peripheral wall of the second fan-shaped plate.

[0013] Furthermore, a locking surface is provided on the brake hook, a locking mating surface is provided on the claw, and a return spring is provided between the brake hook and the base plate to drive the brake hook to rotate back to its position, and after the brake hook returns to its position, the locking surface abuts against the locking mating surface to maintain the embedded state of the lock tooth and the limit tooth.

[0014] Furthermore, the locking surface is an arc surface, the locking mating surface is an inclined surface arranged tangent to the locking surface, and a protrusion is provided on the brake hook on one side of the locking surface, and the protrusion can abut against the claw to limit the rotation of the brake hook relative to the claw in the return direction of the brake hook.

[0015] Furthermore, the clamping claw is provided with a cantilever extending toward one side of the brake hook, the cantilever and the lock are respectively provided at both ends of the clamping claw, and the brake hook drives the limit plate and the clamping claw to rotate synchronously by pushing the cantilever.

[0016] Furthermore, the first locking groove and the locking tooth are matching wedge-shaped structures, and / or the second locking groove is an arc-shaped groove arranged along the circumference of the second sector plate, and the width of the limiting tooth is gradually reduced in the direction pointing to the second sector plate.

[0017] Furthermore, the armrest shaft is arranged across the armrest, and the base plate and the clamping plate are located inside the armrest.

[0018] Furthermore, a damper and / or a booster spring is provided between the armrest shaft and the armrest frame, the damper is used to apply a damping force when the armrest rotates, and the booster spring is used to apply an elastic force opposite to the unfolding direction to the armrest when the armrest is unfolded after being unlocked.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The car seat armrest locking mechanism described in the present invention realizes the locking of the armrest in the folded state by arranging two fan-shaped plates with locking grooves on the card plate, and by embedding the locking teeth in the first locking groove and the limiting teeth in the second locking groove. When the armrest is rotated after being unlocked, the locking teeth can slide along the outer peripheral wall of the first fan-shaped plate, and the limiting teeth can slide along the outer peripheral wall of the second fan-shaped plate. Therefore, not only can the locking cooperation between the locking teeth and the limiting teeth and their respective corresponding locking grooves be utilized to improve the locking strength when the armrest is folded, but the locking teeth and the limiting teeth can also be utilized to slide along the guiding guide of the outer peripheral wall of the corresponding fan-shaped plate to improve the smoothness of the movement of the armrest when unfolding and folding, thereby improving the overall use quality of the car seat.

[0021] In addition, the central angle of the first sector plate is smaller than that of the second sector plate, and the locking teeth first slide along the first sector plate, and then the limiting teeth slide along the second sector plate. This can reduce the size of the first sector plate while ensuring the smoothness of the armrest's unfolding and retracting movements, and facilitate the placement of the locking mechanism inside the armrest. Through the mutually cooperating locking surface and locking mating surface, as well as the provision of a return spring, the brake hook can automatically return to its original position, and the locking state of the locking teeth and the limiting teeth can be maintained when the armrest is retracted, thereby ensuring the stability of the armrest locking. The locking surface is configured as an arc surface, and the locking mating surface is configured as an inclined surface tangent to the locking surface. At the same time, a protrusion that can abut against the claw is provided, which can absorb the manufacturing tolerances of the parts between the cooperating brake hook and the claw, avoiding the gap caused by manufacturing tolerances, and effectively reducing the amount of shaking when the armrest is locked.

[0022] In addition, a cantilever is provided on the latch, and the brake hook pushes against the cantilever to rotate the latch and stop plate. This allows the brake hook to drive the latch and stop plate, while also offering the advantages of a simple structure and ease of design. The first locking groove and locking teeth are designed as a wedge-shaped structure, which can also absorb the clearance caused by component manufacturing tolerances, effectively reducing the amount of wobble when the armrest is locked. The second locking groove is an arc-shaped groove, and the width of the stop teeth is designed to gradually decrease. This facilitates the locking engagement between the stop teeth and the second locking groove, improving the smoothness of the stop teeth's rotation with the stop plate. By having the armrest shaft pass through the armrest, and with the base plate and latch plate located within the armrest, the entire locking mechanism can be located inside the armrest, preventing it from being exposed and affecting the appearance of the armrest and seat. The damper and booster spring both enhance the smoothness of the armrest's deployment and rotation. The booster spring also allows for easy retraction, enhancing the sense of luxury and safety when using the armrest.

[0023] Another object of the present invention is to provide a rear seat for a car, wherein the rear seat is provided with an armrest located in the middle position of the backrest, the armrest is rotatably connected to the armrest shaft in the rear seat of the car, and the armrest is provided with the car seat armrest locking mechanism as described above, and an unlocking handle is provided on the armrest that is transmission-connected to the brake hook, and the unlocking handle is used to apply the external force to the brake hook.

[0024] In addition, the present invention also provides a car, in which the rear seats as described above are provided.

[0025] The rear seat of the car and the car provided with the above-mentioned car seat armrest locking mechanism described in the present invention can improve the locking strength of the rear seat armrest when it is folded, and can improve the smoothness of the movement of the armrest when it is unfolded, thereby improving the use quality of the rear seat armrest and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of an armrest provided with the armrest locking mechanism of an automobile seat according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0029] Figure 3 A schematic diagram of the cooperation between the armrest locking mechanism and the armrest frame of an automobile seat according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the cooperation between the locking mechanism and the unlocking handle of the car seat armrest according to an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A schematic diagram of the structure shown from another perspective;

[0032] Figure 6 This is a structural schematic diagram of a car seat armrest locking mechanism according to an embodiment of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of the structure shown from another perspective;

[0034] Figure 8 This is a schematic diagram of the car seat armrest locking mechanism according to an embodiment of the present invention without a base plate;

[0035] Figure 9 for Figure 8 A schematic diagram of the structure shown from another perspective;

[0036] Figure 10 This is a schematic diagram of the coordination between the clamping plate, the brake hook and the clamping claw according to an embodiment of the present invention;

[0037] Figure 11 This is an exploded view of the structure of the car seat armrest locking mechanism according to an embodiment of the present invention;

[0038] Figure 12 This is a structural diagram of a card board according to an embodiment of the present invention;

[0039] Figure 13 This is a schematic structural diagram of a brake hook according to an embodiment of the present invention;

[0040] Figure 14 This is a schematic structural diagram of the clamping claw according to an embodiment of the present invention;

[0041] Figure 15 This is a schematic structural diagram of a limit plate according to an embodiment of the present invention;

[0042] Figure 16 This is a schematic diagram of a locking mechanism for an automobile seat armrest according to an embodiment of the present invention in a locked state;

[0043] Figure 17 A schematic diagram of the brake hook according to an embodiment of the present invention in a critical unlocking position;

[0044] Figure 18 This is a schematic diagram of the brake hook according to an embodiment of the present invention in the maximum locking position;

[0045] Figure 19A schematic diagram of the arrangement of a damper and a booster spring according to an embodiment of the present invention;

[0046] Figure 20 A schematic diagram of the coaxial arrangement of the unlocking handle and the force reducing lever according to an embodiment of the present invention;

[0047] Description of reference numerals:

[0048] 1. Armrest; 2. Mounting bracket; 3. Unlock handle; 4. Armrest shaft; 5. Base plate; 6. Clamping plate; 7. Brake hook; 8. Clamping claw; 9. Limit plate; 10. Brake hook rivet; 11. Clamping claw rivet; 12. Limit plate rivet; 13. Small bushing; 14. Large bushing; 15. Return spring; 16. Pull wire; 17. Reducing lever; 18. Damper; 19. Booster spring; 20. Connecting rod; 21. Lock washer

[0049] 101, armrest frame; 201, mounting arm; 401, assist spring connection hole; 601, first sector plate; 6011, first locking groove; 6021, second locking groove; 602, second sector plate; 701, locking surface; 702, protrusion; 703, hook; 704, cable connection hole; 801, locking tooth; 802, cantilever; 803, locking mating surface; 901, limiting tooth; 1701, rotating plate; 1702, linkage rod;

[0050] a. Trajectory one; b. Trajectory two. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0052] In the description of the present invention, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0053] Furthermore, in the description of the present invention, unless otherwise explicitly stated, mating components may be connected using conventional connection structures in the art. Furthermore, the terms "installed," "connected," "connected," and "connector" should be interpreted broadly. For example, they may be fixed, removable, or integral; mechanical or electrical; directly or indirectly through an intermediary, or internally connected between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0054] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0055] Example 1

[0056] This embodiment relates to a vehicle seat armrest locking mechanism (hereinafter referred to as the locking mechanism) for locking the armrest on a vehicle seat in a stowed position. It should be noted that the stowed position herein refers to the position in which the armrest is flush with or aligned with the seat back. This position allows for a larger usable area of ​​the seat cushion. Of course, the armrest, when flipped relative to the seat back toward the seat cushion, is deployed, providing access to the passenger's area.

[0057] In addition, it should be noted that the armrest 1 described in this embodiment can be an armrest 1 on a seat at any position in a car, as long as the armrest 1 on the seat can be flipped and switched between a retracted state and an extended state.

[0058] However, as a preferred exemplary application form, combined with Figure 1 and Figure 2 As shown in FIG, the armrest 1 of this embodiment can be, for example, an armrest 1 on a rear seat of a vehicle, and more specifically, a center armrest located in the middle of the rear seat backrest. In this case, by applying the locking mechanism of this embodiment to the center armrest of the rear seat, the locking strength of the armrest 1 when stowed can be improved, and the smoothness of the movement of the armrest 1 when deployed and stowed can also be improved.

[0059] Based on the above introduction, the overall structure continues to combine Figures 3 to 10 As shown in the figure, the locking mechanism of this embodiment includes a base plate 5 fixedly connected to the armrest frame 101 and rotatably mounted on the armrest shaft 4, and a clamping plate 6 fixedly connected to the armrest shaft 4. It also includes a brake hook 7 and a claw 8 rotatably connected to the base plate 5, and a limit plate 9 connected to the claw 8, and the limit plate 9 and the claw 8 rotate around the same axis.

[0060] At the same time, a first fan-shaped plate 601 and a second fan-shaped plate 602 are arranged radially along the armrest shaft 4 on the clamping plate 6, the radius of the first fan-shaped plate 601 is larger than that of the second fan-shaped plate 602, and a first locking groove 6011 is provided on the outer peripheral wall of the first fan-shaped plate 601, and a second locking groove 6021 is provided on the outer peripheral wall of the second fan-shaped plate 602, a locking tooth 801 is provided on the clamping claw 8, and a limiting tooth 901 is provided on the limiting plate 9.

[0061] By adopting the above-described structure, this embodiment also locks the armrest 1 in the retracted state by embedding the locking tooth 801 in the first locking groove 6011 and the limiting tooth 901 in the second locking groove 6021 when the armrest is retracted. When the brake hook 7 is driven to rotate by an external force, the brake hook 7 can drive the limiting plate 9 and the claw 8 to rotate synchronously, thereby disengaging the locking tooth 801 from the first locking groove 6011 and the limiting tooth 901 from the second locking groove 6021, thereby unlocking the armrest 1. When the unlocked armrest rotates, the locking tooth 801 can slide along the outer peripheral wall of the first sector plate 601, while the limiting tooth 901 can also slide along the outer peripheral wall of the second sector plate 602, thereby supporting and guiding the rotation of the armrest 1 and enhancing the smoothness of the rotation of the armrest 1.

[0062] Specifically, it is still Figures 1 to 5 As shown, the armrest 1 of this embodiment can be mounted to a car seat, for example, via a mounting bracket 2. The mounting bracket 2 is fixedly attached to the seat frame, forming a mounting base for the armrest 1. Furthermore, the mounting bracket 2 is specifically connected to the armrest shaft 4 via two opposing mounting arms 201 thereon. This connection can be achieved, for example, by welding, to ensure a reliable connection between the mounting bracket 2 and the armrest shaft 4 and facilitate the connection operation.

[0063] In addition, to ensure the reliable locking of the armrest 1, see Figures 3 to 5 Preferably, in this embodiment, two locking mechanisms are arranged opposite each other on the left and right sides, and the two locking mechanisms have the same structure and operate synchronously to jointly lock the armrest 1 in the retracted state. In this case, based on the identical structure of the two locking mechanisms, this embodiment will also take one of the locking mechanisms as an example to specifically describe its structure.

[0064] Continue as Figure 11As shown in , the base plate 5 of this embodiment can be a stamped sheet metal part and can be fixed to the armrest frame 101 by screwing or riveting. Moreover, to ensure the rotational assembly of the base plate 5 on the armrest shaft 4, preferably, a large bushing 14 can be installed on the base plate 5 in this embodiment, and the base plate 5 can be assembled onto the armrest shaft 4 via the large bushing 14. At the same time, a locking washer 21 can also be provided on the armrest shaft 4 outside the base plate 5 to ensure the stability of the position of the base plate 5 on the armrest shaft 4.

[0065] In specific implementation, the above-mentioned large bushing 14 can be made of a material with lower hardness and better wear resistance than the armrest shaft 4. It can be understood that by providing the large bushing 14, not only the stability of the rotation of the base plate 5 relative to the armrest shaft 4 can be increased, but it is also beneficial to reduce the wear of the base plate 5 and the armrest shaft 4 during relative rotation.

[0066] In this embodiment, the brake hook 7 is rotatably connected to the mounting plate 5 via the brake hook rivet 10, and the claw 8 and the limit plate 9 are rotatably connected to the mounting plate 5 via the claw rivet 11. Furthermore, the claw 8 and the limit plate 9 are further connected via the limit plate rivet 12. The claw rivet 11 enables the claw 8 and the limit plate 9 to rotate about the same axis (i.e., the axis of the claw rivet 11). Combined with the connection of the limit plate rivet 12, the limit plate 9 and the claw 8 can rotate synchronously.

[0067] As a preferred embodiment, to reduce wear on the brake hook 7, claw 8, and stop plate 9 during rotation, this embodiment also provides small bushings 13 between the brake hook 7 and the brake hook rivet 10, and between the claw 8, stop plate 9, and the claw rivet 11. Compared to the brake hook rivet 10 and claw rivet 11, each small bushing 13 can be made of a material with lower hardness and better wear resistance.

[0068] As a feasible implementation form, the armrest shaft 4 of this embodiment is specifically composed of a multi-section tube structure, and the clamping plate 6 fixedly connected to the armrest shaft 4 is as follows. Figure 12 As shown, the card plate 6 is integrally formed with a portion of the armrest shaft 4. At this time, the card plate 6 and the armrest shaft 4 are formed by Figure 12 The structural form shown in can ensure the reliability of the connection between the card plate 6 and the armrest shaft 4, and can also save the connection operation of the card plate 6.

[0069] It should be noted that, in addition to making the clamping plate 6 and a part of the armrest shaft 4 integrally formed, it is also possible to make the armrest shaft 4 adopt an integrally formed shaft structure and fix the clamping plate 6 to the armrest shaft 4 by welding, riveting or screwing.

[0070] This embodiment is a preferred embodiment, see Figure 12 As shown, the central angle of the first sector plate 601 is also set to be smaller than the central angle of the second sector plate 602. In this way, by reducing the central angle of the first sector plate 601, the size of the first sector plate 601 can be reduced, and then the Figure 6 As shown, the first sector plate 601 with a larger radius is accommodated in the bottom plate 5 , so as to reduce the size of the entire locking mechanism and facilitate the arrangement of the locking mechanism inside the armrest 1 .

[0071] In addition, since the central angle of the first sector plate 601 is smaller than that of the second sector plate 602, when the armrest rotates after being unlocked, the locking tooth 801 on the claw 8 will first slide along the outer peripheral wall of the first sector plate 601, that is, along track 1 a, and after the locking tooth 801 is disengaged from the outer peripheral wall of the first sector plate 601, the limiting tooth 901 on the limiting plate 9 will slide along the outer peripheral wall of the second sector plate 602, that is, along track 2 b. In this way, it can be understood that by making the locking tooth 801 slide along the first sector plate 601 first and then the limiting tooth 901 slide along the second sector plate 602, it is possible to ensure the smooth movement of the armrest 1 during the deployment and folding process while the central angle of the first sector plate 601 is small.

[0072] Still by Figures 8 to 10 , and combined with Figure 13 and Figure 14 As shown, this embodiment, as a preferred implementation form, is provided with a locking surface 701 on the brake hook 7, and a locking mating surface 803 on the claw 8. Furthermore, a return spring 15 is further provided between the brake hook 7 and the base plate 5. One end of the return spring 15 is hooked on the base plate 5, and the other end is hooked on the hook 703 of the brake hook 7. When an external force drives the brake hook 7 to rotate, the return spring 15 stretches to store energy. When the armrest 1 returns from the deployed state to the retracted state, the return spring 15 releases energy to drive the brake hook 7 to rotate back to its original position.

[0073] Furthermore, after the brake hook 7 returns to its original position, the locking surface 701 abuts against the locking mating surface 803 to maintain the embedded state of the lock tooth 801 and the limiting tooth 901. It is understood that, through the interlocking locking surface 701 and the locking mating surface 803, as well as the provision of the return spring 15, this embodiment can achieve automatic return of the brake hook 7 compared to using the brake hook 7 to return under its own gravity, thereby ensuring the effectiveness of the brake hook 7. Furthermore, by maintaining the embedded state of the lock tooth 801 and the limiting tooth 901 by the returned brake hook 7, the locked state of the lock tooth 801 and the limiting tooth 901 can also be maintained when the armrest 1 is retracted, thereby ensuring the stability of the locking of the armrest 1.

[0074] On the basis of the above-mentioned locking surface 701 and locking mating surface 803, as a preferred implementation form, this embodiment further sets the locking surface 701 as an arc surface, and also sets the locking mating surface 803 as an inclined surface tangent to the locking surface 701, and a protrusion 702 located on one side of the locking surface 701 is also provided on the brake hook 7.

[0075] At this time, combined Figures 16 to 18 As shown in FIG, during the return process of the brake hook 7, the brake hook 7 is Figure 17 The critical unlocked position shown is Figure 16 The locking position shown is moved and in some special cases the brake hook 7 is also moved to Figure 18 The maximum locking position shown is achieved by abutting the protrusion 702 against the claw 8. Thus, the protrusion 702 can, on the one hand, limit the rotation of the brake hook 7 relative to the claw 8 in the return direction of the brake hook 7. On the other hand, since the locking surface 701 is an arcuate surface and the locking mating surface 803 is an inclined surface tangent to the locking surface 701, the brake hook 7 can move further from the locked position to the maximum locking position. This can absorb the manufacturing tolerances between the mating parts of the brake hook 7 and the claw 8, avoiding gaps between the various components of the locking mechanism due to manufacturing tolerances, and effectively reducing the amount of wobble when the armrest 1 is locked.

[0076] In this embodiment, as a preferred implementation form, a cantilever arm 802 is provided on the claw 8, extending toward one side of the brake hook 7. The cantilever arm 802 and the lock are provided at both ends of the claw 8. The brake hook 7 pushes against the cantilever arm 802 to drive the limit plate 9 and the claw 8 to rotate synchronously. In this case, by providing the cantilever arm 802 on the claw 8 and allowing the brake hook 7 to drive the claw 8 and the limit plate 9 to rotate by pushing against the cantilever arm 802, not only can the brake hook 7 drive the rotation of the claw 8 and the limit plate 9, but it also has the advantages of simple structure and ease of design.

[0077] In this embodiment, as a preferred implementation, the first locking groove 6011 on the first sector plate 601 and the locking tooth 801 that locks therewith are also designed to be matched wedge-shaped structures. This matching wedge-shaped structure of the first locking groove 6011 and the locking tooth 801 can also absorb the clearance caused by part manufacturing tolerances, effectively reducing the amount of wobble when the armrest 1 is locked.

[0078] Still Figure 12 As shown, in this embodiment, the second locking groove 6021 is specifically configured as an arc groove arranged along the circumference of the second sector plate 602, and as shown in FIG. Figure 15As shown, the width of the limiting tooth 901 is gradually reduced in the direction pointing to the second sector plate 602. In this case, the second locking groove 6021 is configured as an arc groove, and the width of the limiting tooth 901 is gradually reduced, which is conducive to achieving the locking cooperation between the limiting tooth 901 and the second locking groove 6021, and can improve the smoothness of the rotation of the limiting tooth 901 with the limiting plate 9.

[0079] It should be noted that, in the specific implementation, since the second locking groove 6021 is an arc groove, when the armrest 1 is in the retracted state, and the locking mechanism is as follows Figure 16 After entering the locked state as shown, the circumferential length and position of the second locking groove 6021 can be designed so that the end of the limiting tooth 901 abuts against one end of the second locking groove 6021. This can enhance the locking effect between the mutually cooperating limiting tooth 901 and the second locking groove 6021, further improve the locking strength of the armrest 1, and reduce the amount of shaking at the far end of the armrest 1.

[0080] In this embodiment, as a preferred embodiment, see Figures 1 to 3 As shown, the armrest shaft 4 is also specifically arranged to pass through the armrest 1, and the base plate 5 and the clamping plate 6 are also located inside the armrest 1. In this case, by making the armrest shaft 4 pass through the armrest 1, and in particular making the base plate 5 and the clamping plate 6 located inside the armrest 1, the entire locking mechanism can be placed inside the armrest, thereby preventing the locking mechanism from being exposed and affecting the appearance quality of the armrest 1 and the seat.

[0081] As a preferred implementation form, this embodiment continues to combine Figure 19 As shown, a damper 18 and a booster spring 19 may be provided between the armrest shaft 4 and the armrest frame 101, or only one of the damper 18 and the booster spring 19 may be provided. Furthermore, the damper 18 is specifically configured to apply a damping force when the armrest 1 rotates, while the booster spring 19 is specifically configured to apply an elastic force to the armrest 1 in the opposite direction of deployment when the unlocked armrest 1 is deployed.

[0082] In a specific implementation, the damper 18 can be an existing rotation damping structure, and two dampers 18 can be arranged side by side and connected to the armrest frame 101 via a connecting rod 20. The assist spring 19 can be a torsion spring structure sleeved on the armrest shaft 4, with one end fixedly connected to the armrest frame 101 and the other end connected to the assist spring connection hole 401 on the armrest shaft 4. It can be understood that the provision of the damper 18 and the assist spring 19 not only improves the smoothness of the unfolding and rotating armrest 1, but also, the assist spring 19 can be used to easily retract the armrest 1 when the armrest 1 is retracted, thereby enhancing the sense of luxury and safety of the armrest 1.

[0083] In addition, Figure 1 、 Figure 4 、 Figure 5 as well as Figure 20 As shown, as a preferred embodiment, an unlocking handle 3 is provided on the armrest 1, and the unlocking handle 3 is rotatably set on the armrest frame 101, and after being transmitted by the force reducing lever 17, the brake hook 7 is pulled by the pull wire 16 to apply the said "external force" to the brake hook 7.

[0084] Specifically, the force-reducing lever 17 comprises opposing rotating plates 1701 and a linkage rod 1702 fixedly connected between the two rotating plates 1701. Two pull wires 16 are arranged one for each locking mechanism, with one end of each pull wire 16 connected to the rotating plate 1701 and the other end connected to a pull wire connection hole 704 on the brake hook 7. To unlock the locking mechanism, the unlocking handle 3 is pulled. The unlocking handle 3 pulls the pull wire 16 via the force-reducing lever 17, which in turn pulls the brake hook 7. The brake hook 7 then drives the pawl 8 and the limit plate 9 to rotate synchronously, unlocking the locking teeth 801 and the limit teeth 901.

[0085] On the basis of adopting the above-mentioned reducing lever 17, this embodiment is preferred, as Figure 20 As shown, in a specific design, the unlocking handle 3 and the rotation axis O of the force reducing lever 17 can also be coaxially arranged. In this case, the provision of the force reducing lever 17 and the coaxiality of the rotation axis O of the unlocking handle 3 and the force reducing lever 17 not only facilitate the arrangement of the unlocking handle 3 and the force reducing lever 17, but also improve the load efficiency of the pull wire 16 when the unlocking handle 3 pulls the pull wire 16 through the force reducing lever 17, thereby reducing the unlocking force and improving the quality of the unlocking operation.

[0086] In this embodiment, during specific implementation, preferably, the above-mentioned clamping plate 6, brake hook 7, claw 8, limit plate 9, etc. can be prepared by modulated alloy steel 30CrMo, and the brake hook rivet 10, claw rivet 11 and limit plate rivet 12, etc. can be prepared by modulated medium carbon steel SWRCH35K.

[0087] Moreover, based on what has been described above, when the locking mechanism of this embodiment is in use, the armrest 1 in the retracted state can be Figure 16 As shown, the armrest 1 is locked. To use the armrest 1, the unlocking handle 3 is pulled, and an external force is applied to the brake hook 7 via the pull wire 16. The brake hook 7 rotates around the brake hook rivet 10, first disengaging from the claw 8. It then pushes against the cantilever 802 on the claw 8, causing the claw 8 and the limiting plate 9 to begin rotating. The rotating claw 8 and the limiting plate 9 first disengage the locking tooth 801 from the first locking groove 6011, and the limiting tooth 901 from the second locking groove 6021, thereby achieving unlocking.

[0088] After unlocking, the lock tooth 801 slides along the track a on the first fan-shaped plate 601. After the lock tooth 801 leaves the track a, the limiting tooth 901 slides along the track b on the second fan-shaped plate 602 until the armrest 1 rotates to contact the seat cushion, or the armrest 1 is limited by the relevant limiting structure and reaches the unfolded state.

[0089] After the armrest 1 has been used, or when a third person is required to sit in the rear seat, the armrest 1 is manually pulled upward to return to the stowed position. The locking teeth 801 and the limiting teeth 901 in the locking mechanism return along their corresponding tracks, and the return spring 15 pulls the brake hook 7 back into position. When the locking teeth 801 re-engage the first locking groove 6011 and the limiting teeth 901 re-engage the second locking groove 6021, the armrest 1 returns to the stowed state and is locked, thus achieving the stowed and restored position of the armrest 1.

[0090] The car seat armrest locking mechanism of this embodiment realizes the locking of the armrest 1 in the folded state by setting two fan-shaped plates with locking grooves on the clamping plate 6, and by embedding the locking tooth 801 in the first locking groove 6011 and the limiting tooth 901 in the second locking groove 6021. When the armrest 1 is rotated after being unlocked, the locking tooth 801 can slide along the outer peripheral wall of the first fan-shaped plate 601, and the limiting tooth 901 can slide along the outer peripheral wall of the second fan-shaped plate 602.

[0091] Therefore, this embodiment can not only utilize the locking cooperation between the locking teeth 801 and the limiting teeth 901 and their respective corresponding locking grooves to improve the locking strength of the armrest 1 when it is folded, but it can also utilize the guided sliding of the locking teeth 801 and the limiting teeth 901 along the corresponding track on the fan-shaped plate to improve the smoothness of the movement of the armrest 1 when it is unfolded and folded, thereby improving the overall use quality of the car seat.

[0092] Example 2

[0093] This embodiment relates to a rear seat for a vehicle. The rear seat is provided with an armrest 1 located in the middle of the backrest. The armrest 1 is also the center armrest of the rear seat. The armrest 1 of this embodiment is rotatably connected to an armrest shaft 4 in the rear seat. The armrest 1, serving as the center armrest, is provided with the vehicle seat armrest locking mechanism of the first embodiment. An unlocking handle 3 is also provided on the armrest 1, which is in transmission connection with a brake hook 7. The unlocking handle 3 is used to apply an external force to the brake hook 7 to unlock the locking mechanism.

[0094] The arrangement of the locking mechanism and the unlocking handle 3 in the armrest 1 in this embodiment can still refer to the relevant description in the above embodiment 1.

[0095] The rear seat of the car in this embodiment is provided with the locking mechanism of the first embodiment, which can improve the locking strength of the rear seat center armrest when it is folded, and can improve the smoothness of the movement of the center armrest when it is unfolded, thereby improving the usability of the rear seat center armrest and having good practicality.

[0096] Example 3

[0097] This embodiment relates to a car equipped with the rear seat described in Example 2. Furthermore, by providing the rear seat described in Example 2, the car of this embodiment can improve the locking strength of the rear seat center armrest when it is retracted and improve the smoothness of the movement of the center armrest when it is deployed, thereby improving the usability of the rear seat center armrest and providing excellent practicality.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A car seat armrest locking mechanism, characterized by: It comprises a base plate (5) fixedly connected to the handrail frame (101) and rotatably mounted on the handrail shaft (4), and a clamping plate (6) fixedly connected to the handrail shaft (4), and also comprises a braking hook (7) and a clamping claw (8) rotatably connected to the base plate (5), and a limiting plate (9) connected to the clamping claw (8), wherein the limiting plate (9) and the clamping claw (8) rotate around the same axis; The clamping plate (6) is provided with a first sector plate (601) and a second sector plate (602) radially arranged along the armrest shaft (4), the radius of the first sector plate (601) is larger than that of the second sector plate (602), and the first sector plate (601) is provided with a first locking groove (6011), and the second sector plate (602) is provided with a second locking groove (6021), the clamping claw (8) is provided with a locking tooth (801), and the limiting plate (9) is provided with a limiting tooth (901); When the armrest is folded, the locking tooth (801) is embedded in the first locking groove (6011), and the limiting tooth (901) is embedded in the second locking groove (6021), so as to lock the armrest; When the braking hook (7) is driven to rotate by an external force, the braking hook (7) can drive the locking tooth (801) to disengage from the first locking groove (6011), and the limiting tooth (901) to disengage from the second locking groove (6021), thereby unlocking the armrest; When the armrest rotates after being unlocked, the locking teeth (801) can slide along the outer peripheral wall of the first sector plate (601), and the limiting teeth (901) can slide along the outer peripheral wall of the second sector plate (602).

2. The car seat armrest locking mechanism according to claim 1, characterized in that: The central angle of the first sector plate (601) is smaller than that of the second sector plate (602), and when the armrest rotates after being unlocked, the locking tooth (801) first slides along the outer peripheral wall of the first sector plate (601), and after the locking tooth (801) is disengaged from the outer peripheral wall of the first sector plate (601), the limiting tooth (901) slides along the outer peripheral wall of the second sector plate (602).

3. The car seat armrest locking mechanism according to claim 1, characterized in that: The brake hook (7) is provided with a locking surface (701), the claw (8) is provided with a locking mating surface (803), and a return spring (15) is provided between the brake hook (7) and the base plate (5) for driving the brake hook (7) to rotate back. After the brake hook (7) returns, the locking surface (701) abuts against the locking mating surface (803) to maintain the embedded state of the locking tooth (801) and the limiting tooth (901).

4. The car seat armrest locking mechanism according to claim 3, characterized in that: The locking surface (701) is an arcuate surface, the locking mating surface (803) is an inclined surface arranged tangentially to the locking surface (701), and a protrusion (702) located on one side of the locking surface (701) is provided on the braking hook (7), and the protrusion (702) can abut against the claw (8) to limit the rotation of the braking hook (7) relative to the claw (8) in the return direction of the braking hook (7).

5. The car seat armrest locking mechanism according to claim 3, characterized in that: The clamping claw (8) is provided with a cantilever (802) extending toward one side of the braking hook (7); the cantilever (802) and the locking mating surface (803) are respectively provided at two ends of the clamping claw (8); and the braking hook (7) drives the limiting plate (9) and the clamping claw (8) to rotate synchronously by pushing the cantilever (802).

6. The automobile seat armrest locking mechanism according to claim 1, characterized in that: The first locking groove (6011) and the locking tooth (801) are wedge-shaped structures that are matched with each other; and / or, the second locking groove (6021) is an arc-shaped groove arranged along the circumference of the second sector plate (602), and the width of the limiting tooth (901) is gradually reduced in the direction pointing to the second sector plate (602).

7. The vehicle seat armrest locking mechanism according to any one of claims 1 to 6, characterized in that: The armrest rotating shaft (4) is arranged to cross the armrest (1), and the bottom plate (5) and the clamping plate (6) are located inside the armrest (1).

8. The automobile seat armrest locking mechanism according to claim 7, characterized in that: A damper (18) and / or an assist spring (19) are provided between the armrest rotating shaft (4) and the armrest frame (101), wherein the damper (18) is used to apply a damping force when the armrest (1) rotates, and the assist spring (19) is used to apply an elastic force opposite to the unfolding direction to the armrest (1) when the armrest (1) is unfolded after being unlocked.

9. A rear seat for a car, characterized by: The rear seat of the automobile is provided with an armrest (1) located in the middle of the backrest, the armrest (1) is rotatably connected to the armrest shaft (4) in the rear seat of the automobile, and the armrest (1) is provided with a car seat armrest locking mechanism according to any one of claims 1 to 8, and an unlocking handle (3) is provided on the armrest (1) and is transmission-connected to the brake hook (7), and the unlocking handle (3) is used to apply the external force to the brake hook (7).

10. An automobile, characterized in that: The car is provided with the rear seat according to claim 9.

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