Automobile seat armrest locking mechanism, seat and vehicle

Abstract

The application relates to the technical field of seat parts, and discloses an automobile seat armrest locking mechanism, a seat and a vehicle, the seat armrest locking mechanism comprising an armrest framework assembly and an armrest fixing support assembly, an unlocking lever assembly and a first rotary reset mechanism being arranged on the armrest framework assembly, an unlocking wheel being arranged on the first rotary reset mechanism, a second rotary reset mechanism being arranged on the armrest fixing support assembly, a lock hook being arranged on the second rotary reset mechanism, the unlocking wheel and the lock hook being matched, the unlocking lever assembly driving the rotation of the unlocking wheel, and the locking or unlocking of the unlocking wheel and the lock hook being realized. The locking or unlocking of the unlocking wheel and the lock hook is realized through the cooperation of the unlocking wheel and the lock hook, the armrest only needs to be rotated to be locked in use, the unlocking is realized through the unlocking lever assembly, the whole structure is simple, the manufacturing cost is lower, the locking of the automobile rear seat large armrest can be realized, and the high cost problem of the automobile seat large armrest can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seat parts, in particular to an automobile seat armrest locking mechanism, a seat and a vehicle. BACKGROUND

[0002] With the continuous progress of automobile development, automobiles have evolved from original means of transportation into the third space besides people's life and work. Among them, the rear seat plays a very key role in the process of space evolution. The large sofa and large mattress highlight the position of the rear seat in the vehicle space. The rear backrest large armrest is favored by major automakers because it can provide comfortable arm support, variable storage space, intelligent interaction experience and visual space separation. However, in order to meet the collision requirements of automobiles, the large armrest needs to have a locking function.

[0003] The locking mechanism of the traditional seat large armrest, such as the patent with the authorized announcement number CN219056064U, discloses an automobile seat armrest locking mechanism, an automobile rear seat and an automobile. Although the automobile seat armrest locking mechanism can improve the locking strength when the armrest is folded, and can improve the stability of the movement when the armrest is unfolded and folded, and can improve the overall use quality of the automobile seat. However, its structure is relatively complex, the production cost is high, and this type of large armrest seat is often used only on high-end vehicles. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an automobile seat armrest locking mechanism, a seat and a vehicle, which has a simpler structure and lower cost, is used for locking the large armrest of the automobile rear seat, and solves the problem of high cost of the current automobile seat large armrest.

[0005] The present application solves the above technical problems through the following technical means:

[0006] In a first aspect, the present application discloses an automobile seat armrest locking mechanism, which comprises an armrest framework assembly and an armrest fixed support assembly. An unlocking lever assembly and a first rotation reset mechanism are arranged on the armrest framework assembly, and an unlocking wheel is arranged on the first rotation reset mechanism. A second rotation reset mechanism is arranged on the armrest fixed support assembly, and a lock hook is arranged on the second rotation reset mechanism. The unlocking wheel and the lock hook are matched and arranged, the rotation of the unlocking wheel is driven by the unlocking lever assembly, and the locking or unlocking of the unlocking wheel and the lock hook is realized. This technical solution realizes the locking or unlocking of the unlocking wheel and the lock hook through the cooperation of the unlocking wheel and the lock hook. When in use, the armrest can be locked by rotating it, and the unlocking is realized by using the unlocking lever assembly. The whole structure is simple, the manufacturing cost is also lower, and it is used for locking the large armrest of the automobile rear seat, which can solve the problem of high cost of the current automobile seat large armrest.

[0007] Further, the handrail skeleton assembly comprises a first skeleton body and a second skeleton body, the unlocking lever assembly is arranged between the first skeleton body and the second skeleton body, and the first rotation reset mechanism is arranged on the first skeleton body; the handrail fixing support assembly comprises a first fixing support, and the second rotation reset mechanism is arranged on the first fixing support.

[0008] Further, the unlocking lever assembly comprises an unlocking lever and an unlocking tab, the unlocking lever is rotatably arranged between the first skeleton body and the second skeleton body, and the unlocking tab is fixedly arranged on the unlocking lever; the unlocking wheel is fixedly arranged on the end of the unlocking lever close to the first skeleton body. In this way, in use, the unlocking lever can be rotated by rotating the unlocking tab, the rotation of the unlocking lever drives the unlocking wheel to rotate, and thus the unlocking of the unlocking wheel and the locking hook is realized.

[0009] Further, the unlocking tab is fixedly connected with an unlocking cable. In this scheme, the unlocking cable can be connected with a pull ring located outside the handrail, and in use, the unlocking tab can be pulled by the unlocking cable by pulling the pull ring outside, which is more convenient.

[0010] Further, the first rotation reset mechanism comprises an unlocking lever return spring and an unlocking lever fixing shaft sleeve, the first skeleton body is provided with a first through hole, and the unlocking lever is slidably arranged through the first through hole; the unlocking lever fixing shaft sleeve is arranged on the unlocking lever between the unlocking tab and the first skeleton body, the unlocking lever return spring is arranged on the unlocking lever fixing shaft sleeve, one end of the unlocking lever return spring is hung on the unlocking tab, and the other end of the unlocking lever return spring is hung on the first skeleton body. In this way, when the unlocking tab is pulled, the unlocking lever is rotated to compress the unlocking lever return spring, and the unlocking wheel can be driven to rotate; and under the action of the unlocking lever return spring, the unlocking wheel can be reset.

[0011] Further, an unlocking lever mounting hole is formed in the end of the unlocking lever close to the first skeleton body, an unlocking wheel shaft is detachably arranged in the unlocking lever mounting hole, and the unlocking wheel is arranged at the end of the unlocking wheel shaft away from the unlocking lever. In this way, the unlocking lever and the unlocking wheel are more convenient to disassemble and assemble.

[0012] Further, the unlocking wheel is an oval shape, the unlocking wheel is eccentrically arranged at the end of the unlocking lever close to the first skeleton body, the short axis length of the unlocking wheel is A, the long axis length of the unlocking wheel is B, the hook length of the locking hook is C, and the inner side angle of the locking hook is D, wherein 0.4

[0013] Further, the second rotation reset mechanism comprises a hook return spring, a fixed shaft and a limiting piece, the fixed shaft is fixedly installed on the first fixed support, the hook and the hook return spring are sleeved on the fixed shaft, and the limiting piece is fixedly installed on the end of the fixed shaft; one end of the hook return spring is hung on the first fixed support, and the other end of the hook return spring is hung on the hook. Through the rotation of the unlocking wheel, the hook can be driven to rotate, and the hook return spring can reset the hook.

[0014] Further, the first fixed support is provided with a second through hole, the fixed shaft is a fixed screw, and the limiting piece is a fixed nut; the fixed screw is fixedly arranged in the second through hole, and the fixed nut is threadedly connected to the end of the fixed screw. Through the above arrangement, the second rotation reset mechanism is more convenient to disassemble and assemble.

[0015] Further, the first framework body is provided with a first armrest shaft pin, and the second framework body is provided with a second armrest shaft pin. The first armrest shaft pin and the second armrest shaft pin can be used to rotate the locking mechanism and install it on the seat armrest. When the seat armrest is opened downward, the unlocking lever assembly can be driven to rotate, and finally the locking mechanism can be locked.

[0016] Further, the armrest fixed support assembly further comprises a support bushing, the first fixed support is provided with a first arc-shaped hole, the support bushing is provided with a second arc-shaped hole matched with the first arc-shaped hole, and the unlocking wheel shaft is arranged in the first arc-shaped hole. Through the above arrangement, the unlocking lever can be limited to rotate along the track of the first arc-shaped hole.

[0017] Further, the armrest fixed support assembly further comprises a second fixed support, the second fixed support is provided with an arc-shaped groove matched with the first arc-shaped hole, one end of the unlocking lever close to the second fixed support is arranged in the arc-shaped groove by sliding through the second fixed support, and the end of the arc-shaped groove is provided with a third through hole. In the technical solution, one end of the unlocking lever away from the unlocking wheel is arranged in the arc-shaped groove by sliding, the arc-shaped groove can limit the unlocking lever when the unlocking lever rotates, so that the rotation of the unlocking lever is more stable, and the third through hole is arranged to facilitate the installation of the unlocking lever and the second fixed support.

[0018] In the second aspect, the application further discloses an automobile seat, which comprises the armrest locking mechanism.

[0019] In the third aspect, the application further discloses a vehicle, which comprises a vehicle body and the automobile seat or the armrest locking mechanism.

[0020] The automobile seat armrest locking mechanism, the seat and the vehicle have the following advantages:

[0021] 1、The first fixed support and the second fixed support are welded on the backrest framework, the lock hook is directly installed on the armrest fixed support assembly, the unlocking lever assembly and the unlocking cable are installed on the first framework body and the second framework body, the first framework body is installed on the armrest fixed support assembly, and then the fixing screw at the other end is tightened, when in use, the user can rotate the armrest framework to the back around the armrest shaft, the lock hook is automatically locked on the unlocking lever of the armrest framework assembly, when unlocking, the user pulls the unlocking cable, the unlocking lever rotates and extrudes the lock hook, and the locking and unlocking are realized, the whole structure is simple, the use and installation are very convenient, the manufacturing cost is lower, and the locking of the automobile rear seat armrest is realized, and the high cost problem of the automobile seat armrest is solved.

[0022] 2、The unlocking wheel and the lock hook are matched to achieve the locking and unlocking purposes, the unlocking wheel is elliptical, the specific lock hook structure is matched, the locking and unlocking of the unlocking wheel and the lock hook are quick and effective, and the user uses more conveniently and quickly. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the automobile seat armrest locking mechanism of the application;

[0024] Figure 2 It is Figure 1 the explosion view of the automobile seat armrest locking mechanism;

[0025] Figure 3 It is Figure 1 the detailed schematic view of the armrest framework assembly;

[0026] Figure 4 It is Figure 2 the schematic view of the first fixed support and the second fixed support;

[0027] Figure 5 It is the detailed assembly view of the first framework body and the unlocking lever;

[0028] Figure 6 It is the detailed assembly view of the first fixed support and the lock hook;

[0029] Figure 7 It is the structural schematic view of the unlocking wheel and the lock hook;

[0030] Figure 8 It is the locking process schematic view of the armrest framework assembly of the application;

[0031] Figure 9 It is the unlocking process schematic view of the armrest framework assembly of the application.

[0032] Handrail skeleton assembly 1, second skeleton body 10, first skeleton body 11, first through hole 111, first handrail shaft pin 12, unlocking wheel 13, unlocking wheel shaft 131, unlocking cable 14, unlocking lever fixing shaft sleeve 15, unlocking lever return spring 16, unlocking lever assembly 17, unlocking lever 171, unlocking lever 172, unlocking lever mounting hole 1711, second handrail shaft pin 18;

[0033] Handrail fixing support assembly 2, second fixing support 20, arc-shaped groove 201, third through hole 202, first fixing support 21, second through hole 212, first arc-shaped hole 211, support bushing 22, second arc-shaped hole 221, lock hook 23, lock hook return spring 24, fixing nut 25, fixing screw 26. DETAILED DESCRIPTION

[0034] The application will be described in detail below with reference to the drawings and specific embodiments:

[0035] The embodiments of the application are described below with reference to the specific embodiments, and the advantages and effects of the application can be understood by the person skilled in the art from the disclosure. It should be noted that the drawings provided in the following embodiments are only used for exemplary description, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation of the application. In order to better illustrate the embodiments of the application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar reference numerals in the drawings of the embodiments of the application correspond to the same or similar components, and in the description of the application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation of the application, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Embodiment 1,

[0038] The embodiment of the application is a kind of automobile seat handrail locking mechanism, such as Figures 1-7As shown, including handrail skeleton assembly 1 and handrail fixed support assembly 2; handrail skeleton assembly 1 includes first skeleton body 11 and second skeleton body 10, first skeleton body 11 and second skeleton body 10 are fixedly connected with unlocking lever assembly 17; first skeleton body 11 is provided with a first rotation reset mechanism, and the first rotation reset mechanism is provided with an unlocking wheel 13; handrail fixed support assembly 2 includes first fixed support 21 and second fixed support 20, and the first fixed support 21 is provided with a second rotation reset mechanism, and the second rotation reset mechanism is provided with a lock hook 23; the unlocking wheel 13 and the lock hook 23 are matched, and the details are described below.

[0039] In the embodiment, the unlocking lever assembly 17 includes an unlocking lever 171 and an unlocking tab 172, the unlocking lever 171 is rotatably mounted between the first skeleton body 11 and the second skeleton body 10, and the unlocking tab 172 is fixedly mounted on the unlocking lever 171; the unlocking wheel 13 is fixedly mounted on the end of the unlocking lever 171 close to the first skeleton body 11, and the unlocking tab 172 is fixedly connected with an unlocking cable 14. The seat armrest can connect the pull ring located outside the armrest with the unlocking cable 14, when in use, pulling the pull ring outside can pull the unlocking tab 172 through the unlocking cable 14, thereby driving the unlocking lever 171 to rotate, and the rotation of the unlocking lever 171 further drives the unlocking wheel 13 to rotate, thereby realizing the unlocking of the unlocking wheel 13 and the lock hook 23.

[0040] In the embodiment, the first rotation reset mechanism includes an unlocking lever return spring 16 and an unlocking lever fixed shaft sleeve 15, the first skeleton body 11 is provided with a first through hole 111, and the unlocking lever 171 slides through the first through hole 111; the unlocking lever fixed shaft sleeve 15 is sleeved on the unlocking lever 171 between the unlocking tab 172 and the first skeleton body 11, the unlocking lever return spring 16 is sleeved on the unlocking lever fixed shaft sleeve 15, one end of the unlocking lever return spring 16 is hung on the unlocking tab 172, and the other end of the unlocking lever return spring 16 is hung on the first skeleton body 11. When the unlocking tab 172 is pulled, the unlocking lever 171 rotates, thereby compressing the unlocking lever return spring 16, which can drive the unlocking wheel 13 to rotate; and under the action of the unlocking lever return spring 16, the unlocking wheel 13 can be reset. In order to make the disassembly and assembly of the unlocking lever 171 and the unlocking wheel 13 more convenient, an unlocking lever mounting hole 1711 is formed in the end of the unlocking lever 171 close to the first skeleton body 11, the unlocking lever mounting hole 1711 can be a threaded hole or a mounting blind hole, and in the embodiment, the unlocking lever mounting hole 1711 is a threaded hole, an unlocking wheel shaft 131 is screwed in the unlocking lever mounting hole 1711, and the unlocking wheel 13 is eccentrically mounted on the end of the unlocking wheel shaft 131 away from the unlocking lever 171.

[0041] In the embodiment, the second rotation reset mechanism comprises a hook return spring 24, a fixing screw 26 and a fixing nut 25, the fixing screw 26 is fixedly installed on the first fixing support 21, the hook 23 and the hook return spring 24 are both sleeved on the fixing screw 26, the fixing nut 25 is threadedly connected at the end of the fixing screw 26, one end of the hook return spring 24 is hung on the first fixing support 21, and the other end of the hook return spring 24 is hung on the hook 23, so that the rotation of the unlocking wheel 13 can drive the hook 23 to rotate, and the hook return spring 24 can reset the hook 23.

[0042] The first fixing support 21 is provided with a second through hole 212, and the fixing screw 26 is fixedly arranged in the second through hole 212. The first armrest shaft pin 12 is fixedly arranged in the first skeleton body 11, and the second armrest shaft pin 18 is fixedly arranged in the second skeleton body 10. The first armrest shaft pin 12 and the second armrest shaft pin 18 can be used to rotate the locking mechanism and install the locking mechanism on the seat armrest. When the seat armrest is opened downward, the unlocking lever assembly 17 is driven to rotate, and finally the locking of the locking mechanism is realized. The armrest fixing support assembly 2 further comprises a support bushing 22, the first fixing support 21 is provided with a first arc-shaped hole 211, the support bushing 22 is provided with a second arc-shaped hole 221 matched with the first arc-shaped hole 211, and the unlocking wheel shaft 131 is arranged in the first arc-shaped hole 211. The second fixing support 20 is provided with an arc-shaped groove 201 matched with the first arc-shaped hole 211, one end of the unlocking lever 171 close to the second fixing support 20 is arranged in the arc-shaped groove 201 in a sliding mode, and the arc-shaped groove 201 is provided with a third through hole 202 at the end. In this way, when the unlocking lever 171 rotates, the unlocking lever 171 can rotate along the track of the first arc-shaped hole 211. One end of the unlocking lever 171 away from the unlocking wheel 13 is arranged in the arc-shaped groove 201 in a sliding mode. When the unlocking lever 171 rotates, the arc-shaped groove 201 can limit the unlocking lever 171, so that the rotation of the unlocking lever 171 is more stable. The third through hole 202 is arranged to facilitate the installation of the unlocking lever 171 and the second fixing support 20.

[0043] As shown in Figure 7 In the embodiment, the unlocking wheel is elliptical, the unlocking wheel 13 is eccentrically arranged at the end of the unlocking lever 171, the length of the short axis of the unlocking wheel is A, the length of the long axis of the unlocking wheel is B, the length of the hook part of the hook 23 is C, and the inner side angle of the hook 23 is D. In actual use, 0.4 < A / B < 0.5, A = 1.1 * C ~ 1.3 * C, and 85° < D < 88° can realize the locking and unlocking. In order to make the locking and unlocking of the unlocking wheel and the hook fast and effective and improve the user experience, in the embodiment, A / B is equal to 0.45, A is equal to 1.2 * C, and D is equal to 87°.

[0044] The assembly of the handrail fixed support assembly 2 in this embodiment is as follows: first, the first fixed support 21 and the second fixed support 20 are fixed on the seat back skeleton by welding; the fixed screw 26 is fixed on the second through hole 212 of the first fixed support 21 by welding; then the support bushing 22 is installed in the first arc-shaped hole 211 of the first fixed support 21, and is fixed on the first fixed support 21 by using the clamps to cooperate with the corresponding positions of the first fixed support 21; then the lock hook return spring 24 is put into the fixed screw 26, and one end of the lock hook return spring 24 is hooked on the hook of the first fixed support 21, and then the lock hook 23 is put into the fixed screw 26, and the other end of the lock hook return spring 24 is hooked on the lock hook 23 (see Figure 4 and Figure 6 ) for details. At this time, the assembly of the first fixed support 21 is completed, and the subsequent assembly of the foam, the decorative part and the cover is not related to the core part of the present application, and is not described here.

[0045] The assembly of the handrail skeleton assembly 1 in this embodiment is as follows: first, the first handrail shaft pin 12 and the second handrail shaft pin 18 are respectively welded on the first fixed support 21 and the second fixed support 20; then the unlocking tab 172 is welded on the unlocking lever 171, and then the unlocking lever fixing shaft sleeve 15 is inserted into the unlocking lever return spring 16, and then the unlocking lever fixing shaft sleeve 15 is inserted into the unlocking lever 171 together with the unlocking lever return spring 16, and one end of the unlocking lever return spring 16 is hooked on the unlocking tab 172; then the unlocking lever assembly 17 is combined with the second fixed support 20 together with the unlocking lever return spring 16 and the unlocking lever fixing shaft sleeve 15, and one end of the unlocking lever return spring 16 is hooked in the corresponding support mounting hole of the second fixed support 20; then the unlocking wheel 13 is fixed on the unlocking lever mounting hole 1711 of the unlocking lever 171 by the unlocking wheel shaft 131; finally, the unlocking cable 14 is assembled on the corresponding positions of the unlocking tab 172 and the first handrail skeleton body 11 (see Figure 3 and Figure 5 ) for details. At this time, the assembly of the handrail skeleton assembly 1 is completed, and the subsequent assembly of the foam, the decorative part and the cover is not related to the core part of the present application, and is not described here.

[0046] The assembly of the handrail skeleton assembly 1 and the handrail fixed support assembly 2 in the embodiment is as follows: firstly, the first handrail shaft pin 12 and the unlocking wheel 13 in the handrail skeleton assembly 1 are respectively inserted into the round hole and the second arc-shaped hole 221 of the support bushing 22 in the handrail fixed support assembly 2; then the other end of the unlocking rod 171 in the handrail skeleton assembly 1 is hung on the arc-shaped groove 201 on the other side of the second skeleton body 10 in the handrail fixed support assembly 2; then the handrail skeleton assembly 1 is rotated, so that the third through hole 202 is aligned with the first through hole 111 on the other side of the first skeleton body 11 in the handrail fixed support assembly 2; finally, the fixing nut 25 is tightened, and the assembly of the handrail skeleton assembly 1 and the handrail fixed support assembly 2 is completed.

[0047] The locking function in the embodiment is described as follows: as shown in Figure 8 , the seat handrail is rotated downward, and the handrail skeleton assembly 1 is rotated backward around the first handrail shaft pin 12 and the second handrail shaft pin 18. During the process, the unlocking wheel 13 rotates together with the first handrail shaft pin 12 and the second handrail shaft pin 18. When the unlocking wheel 13 is rotated to a certain angle, the unlocking wheel 13 contacts the locking hook 23 in the handrail fixed support assembly 2. With further rotation of the handrail skeleton assembly 1, the unlocking wheel 13 extrudes the locking hook 23 to rotate around the shaft. When the unlocking wheel 13 passes the most convex point of the locking hook 23, the locking hook 23 reversely rotates around the shaft under the pulling force of the locking hook return spring 24, and returns to the initial state, thereby hooking the unlocking wheel 13. The inside angle of the locking hook 23 is about 87 degrees. Since the unlocking wheel 13 is elliptical, the both ends of the unlocking wheel profile are extruded by the inside profile of the locking hook 23 when the unlocking wheel is axially rotated, so that the unlocking wheel cannot be rotated, and the locking function is achieved.

[0048] The unlocking function in the embodiment is described as follows: as shown in Figure 9 , when unlocking, the unlocking cable 14 is pulled forward, so that the unlocking rod 171 in the handrail skeleton assembly 1 moves around the shaft, and drives the unlocking wheel 13 to rotate. Since the unlocking wheel 13 is elliptical, the unlocking wheel profile extrudes the locking hook 23 when the unlocking wheel is rotated, so that the locking hook 23 rotates around the shaft. After a certain angle, the unlocking wheel profile will pass the highest point of the locking hook profile. At this time, the handrail skeleton assembly 1 starts to rotate forward around the first handrail shaft pin 12 and the second handrail shaft pin 18 under the pulling force of the unlocking cable 14, so that the unlocking wheel 13 is separated from the locking hook 23, and the locking hook 23 returns to the initial position under the pulling force of the locking hook return spring 24.

[0049] The subsequent locking and unlocking cycles are performed according to the above embodiment. According to the structure of the embodiment, the problem of complex structure and high cost of the large handrail locking structure of the backrest of the automobile seat can be well solved, the cost of the whole seat is effectively reduced, and technical support is provided for the popularization and application of the large handrail.

[0050] Embodiment 2,

[0051] The present embodiment is a vehicle seat including the armrest locking mechanism of the above-described embodiment 1.

[0052] Embodiment 3,

[0053] The present embodiment is a vehicle including a vehicle body and the armrest locking mechanism of the above-described embodiment 1.

[0054] Embodiment 4,

[0055] The present embodiment is a vehicle including a vehicle body and the vehicle seat of the above-described embodiment 2.

[0056] The above embodiments are only used to illustrate the technical solutions of the present application and not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application. The technical, shape, and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A locking mechanism for an automotive seat armrest, characterized in that: The handrail framework assembly and the handrail fixing support assembly, the handrail framework assembly is provided with an unlocking lever assembly and a first rotation reset mechanism, the first rotation reset mechanism is provided with an unlocking wheel; the handrail fixing support assembly is provided with a second rotation reset mechanism, the second rotation reset mechanism is provided with a lock hook; the unlocking wheel and the lock hook are matched, the rotation of the unlocking wheel is driven by the unlocking lever assembly, the locking or unlocking of the unlocking wheel and the lock hook is realized; the handrail framework assembly comprises a first framework body and a second framework body, the unlocking lever assembly is arranged between the first framework body and the second framework body; the unlocking lever assembly comprises an unlocking lever and an unlocking tab, the unlocking lever is rotatably mounted between the first framework body and the second framework body, and the unlocking tab is fixedly mounted on the unlocking lever; the unlocking wheel is fixedly mounted on the end of the unlocking lever close to the first framework body; the unlocking tab is fixedly connected with an unlocking cable; the unlocking wheel is elliptical, the unlocking wheel is eccentrically mounted on the end of the unlocking lever close to the first framework body; the short axis length of the unlocking wheel is A, the long axis length of the unlocking wheel is B, the hook length of the lock hook is C, and the inner side angle of the lock hook is D, wherein 0.4 2. The armrest locking mechanism of claim 1, wherein: The first rotation reset mechanism is arranged on the first framework body; the handrail fixing support assembly comprises a first fixing support, and the second rotation reset mechanism is arranged on the first fixing support.

3. The armrest locking mechanism of claim 1, wherein: The first rotation reset mechanism comprises an unlocking lever return spring and an unlocking lever fixing sleeve, the first framework body is provided with a first through hole, and the unlocking lever slides through the first through hole; the unlocking lever fixing sleeve is sleeved on the unlocking lever between the unlocking tab and the first framework body, the unlocking lever return spring is sleeved on the unlocking lever fixing sleeve, one end of the unlocking lever return spring is hung on the unlocking tab, and the other end of the unlocking lever return spring is hung on the first framework body.

4. The armrest lock mechanism of claim 2, wherein: An unlocking lever mounting hole is formed in the end of the unlocking lever close to the first framework body, an unlocking wheel shaft is detachably mounted in the unlocking lever mounting hole, and the unlocking wheel is arranged at the end of the unlocking wheel shaft away from the unlocking lever.

5. The armrest lock mechanism of claim 2, wherein: The second rotation reset mechanism comprises a lock hook return spring, a fixing shaft and a limiting piece, the fixing shaft is fixedly mounted on the first fixing support; the lock hook and the lock hook return spring are sleeved on the fixing shaft, and the limiting piece is fixedly mounted on the end of the fixing shaft; one end of the lock hook return spring is hung on the first fixing support, and the other end of the lock hook return spring is hung on the lock hook.

6. The armrest lock mechanism of claim 5, wherein: A second through hole is formed in the first fixing support, the fixing shaft is a fixed screw, and the limiting piece is a fixed nut; the fixed screw is fixedly arranged in the second through hole, and the fixed nut is threadedly connected at the end of the fixed screw.

7. The armrest lock mechanism of claim 2, wherein: The first framework body is provided with a first handrail shaft pin, and the second framework body is provided with a second handrail shaft pin.

8. The armrest lock mechanism of claim 4, wherein: The armrest fixed support assembly further comprises a support bushing, the first fixed support is provided with a first arc-shaped hole, the support bushing is provided with a second arc-shaped hole matched with the first arc-shaped hole, and the unlocking wheel shaft is arranged in the first arc-shaped hole.

9. The armrest lock mechanism of claim 8, wherein: The armrest fixed support assembly further comprises a second fixed support, the second fixed support is provided with an arc-shaped slot matched with the first arc-shaped hole, one end of the unlocking rod close to the second fixed support is arranged in the arc-shaped slot and slides through the second fixed support, and the end of the arc-shaped slot is provided with a third through hole.

10. An automotive seat characterized by comprising: The automobile seat comprises the armrest locking mechanism according to any one of claims 1-9.

11. A vehicle characterized by: The vehicle comprises a vehicle body and the automobile seat according to claim 10 or the armrest locking mechanism according to any one of claims 1-9.

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