Automobile armrest positioning device

Abstract

The utility model relates to an automobile armrest positioning device, which relates to the technical field of automobile interior parts and comprises a mounting frame and an armrest body rotatably arranged in the mounting frame, a vertical rotating shaft is rotatably arranged in the mounting frame, and the armrest body is fixedly arranged on the rotating shaft. A sliding assembly for driving the rotating shaft to slide in the length direction of the mounting frame is arranged in the mounting frame, and a positioning assembly for positioning the handrail body is arranged in the mounting frame. The armrest body is pulled to drive the rotating shaft to rotate, so that the armrest body rotates out of the mounting cavity, then the rotating shaft is pushed, the sliding assembly drives the rotating shaft to slide, and therefore the armrest body is driven to slide in the length direction of the mounting frame, namely the extending direction of the mounting cavity; in this way, the horizontal position of the handrail body is adjusted, the using requirements of passengers of different figures for the handrail body are met, and therefore the using convenience of the rear-row handrail and the riding experience feeling of the passengers are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automotive interior parts, especially to an automobile armrest positioning device. BACKGROUND

[0002] In order to facilitate the elbow support of the passengers in the rear row of the car, an armrest is usually arranged in the middle of the seat in the rear row of the car. The armrest is generally hingedly installed at the middle position of the seat and is integrated with the seat in the rear row when stored, so as to provide back support for the passengers. When needed, the armrest is rotated to a horizontal state for elbow support or placing articles such as a water cup.

[0003] In the related art, reference can be made to the Chinese utility model patent with the authorization announcement number CN219727960U, which discloses an armrest for the rear row of a car. The armrest comprises an armrest body rotatably connected to the backrest of the seat in the rear row of the car. The left and right inner walls of the accommodating cavity of the armrest body are each provided with a vertically extending sliding groove. The left and right sides of the lower end of the armrest body are each provided with a rotating shaft rotatably connected to the two sliding grooves and vertically slidable in the sliding grooves. A telescopic rod is installed in the backrest below the armrest body. The upper end of the telescopic rod can abut against the armrest body and does not hinder the rotation of the armrest body. A spring for pressing down or pulling down the rotating shaft is installed in each sliding groove in a vertical manner.

[0004] The telescopic rod and the spring cooperate to ensure the flexible lifting of the armrest body. Moreover, the lifting of the armrest body is controlled by the telescopic rod, so that stepless lifting can be achieved and the experience is improved. However, the armrest body can only be lifted up and down. When the passengers are plump and strong, the armrest body will be blocked by the passengers leaning against the backrest of the seat, so that the armrest body cannot be used, and the convenience of use of the armrest for the rear row and the experience of the passengers are reduced. SUMMARY

[0005] In order to improve the convenience of use of the armrest for the rear row and the experience of the passengers, the utility model provides an automobile armrest positioning device.

[0006] The automobile armrest positioning device provided by the present application adopts the following technical scheme:

[0007] An automobile armrest positioning device comprises a mounting frame and an armrest body rotatably arranged in the mounting frame. The mounting frame is arranged on a seat in the rear row of a car. The backrest of the seat is provided with a horizontal mounting cavity. The mounting frame is arranged in the mounting cavity and has an opening communicating with the mounting cavity. A vertical rotating shaft is rotatably arranged in the mounting frame. The armrest body is fixedly arranged on the rotating shaft. A sliding assembly for driving the rotating shaft to slide along the length direction of the mounting frame is arranged in the mounting frame. A positioning assembly for positioning the armrest body is arranged in the mounting frame. In the initial state, the armrest body is located in the mounting frame and in the mounting cavity.

[0008] By adopting the above technical scheme, the rotating shaft is driven to rotate by pulling the support part, the support part is moved out of the mounting cavity, then the rotating shaft is pushed to move along the extension direction of the mounting cavity, the arc-shaped part is rotated and moved out of the arc-shaped cavity and moves along with the support part in the mounting frame, the arc-shaped part increases the contact area between the support part and the mounting frame during use of the support part, thereby improving the stability of use of the support part, and the convenience of use of the rear-row handrail and the passenger's riding experience are improved.

[0009] Optionally, the handrail body comprises an arc-shaped part and a support part arranged integrally, the rotating shaft is located at the middle of the connection between the arc-shaped part and the support part and is perpendicular to the arc-shaped part and the support part, and one end of the mounting frame has an arc-shaped cavity, and in the initial state, the arc-shaped part is located in the arc-shaped cavity.

[0010] By adopting the above technical scheme, the rotating shaft is driven to rotate by pulling the support part, the support part is moved out of the mounting cavity, then the rotating shaft is pushed to move along the extension direction of the mounting cavity, the arc-shaped part is rotated and moved out of the arc-shaped cavity and moves along with the support part in the mounting frame, the arc-shaped part increases the contact area between the support part and the mounting frame during use of the support part, thereby improving the stability of use of the support part, and the convenience of use of the rear-row handrail and the passenger's riding experience are improved.

[0011] Optionally, the sliding assembly comprises:

[0012] a main rail arranged on the mounting frame and extending along the length direction of the mounting frame;

[0013] a sliding block coaxially fixedly arranged on the rotating shaft and slidingly arranged in the main rail along the length direction of the main rail.

[0014] By adopting the above technical scheme, the rotating shaft is driven to rotate by pulling the support part, the support part is moved out of the mounting cavity, then the rotating shaft is pushed to move along the extension direction of the mounting cavity, the arc-shaped part is rotated and moved out of the arc-shaped cavity and moves along with the support part in the mounting frame, the arc-shaped part increases the contact area between the support part and the mounting frame during use of the support part, thereby improving the stability of use of the support part, and the convenience of use of the rear-row handrail and the passenger's riding experience are improved.

[0015] Optionally, the rotating shaft penetrates the handrail body up and down, the main rail is provided with two, the two main rails are fixedly arranged on the inner top wall and the inner bottom wall of the mounting frame and oppositely arranged, the sliding block is provided with two and corresponds to the main rail one by one, and the two sliding blocks are fixedly arranged on the upper and lower ends of the rotating shaft and slidingly arranged in the corresponding main rail.

[0016] By adopting the technical scheme, the two sliding blocks cooperate with the main track to increase the stability of the handrail body during movement and after movement.

[0017] Optionally, the end of the arc-shaped part away from the support part is provided with a plurality of arc-shaped tooth grooves, and the positioning assembly comprises:

[0018] A spring is arranged on the inner side wall of the mounting frame and extends horizontally, and the extending direction of the spring is perpendicular to the sliding direction of the rotating shaft.

[0019] A wave plate is fixedly arranged at the end of the spring away from the mounting frame and can cooperate with the tooth grooves, and in the initial state, the wave plate is engaged with the end of the arc-shaped part at the first wave.

[0020] By adopting the technical scheme, in the initial state, the first wave of the wave plate is engaged with the end of the arc-shaped part, thereby limiting the arc-shaped part and reducing the probability of rotation of the arc-shaped part. During use, an external force is applied to pull the support part, the support part drives the arc-shaped part to rotate, the arc-shaped part is pressed against the wave plate, the wave plate is pressed against the spring, so that the arc-shaped part is rotated to be parallel to the length direction of the mounting cavity, then the support part is pushed, the support part moves to drive the arc-shaped part to move, the tooth grooves on the arc-shaped part are sequentially engaged with the waves on the wave plate, and when the support part is continuously pushed, the wave plate is continuously stressed and pressed against the spring, so that the movement of the handrail body is not blocked. After the support part is moved to the position, the external force applied to the support part disappears, at this time, the tooth grooves on the arc-shaped part are engaged with the waves on the wave plate and are kept stable under the action of the spring. When it is needed to move again, an external force is artificially applied to continue to drive the arc-shaped part to press against the wave plate, so that the positioning of the handrail body is realized, the convenience of positioning and movement of the handrail body is improved, and the convenience of use of the rear-row handrail and the passenger riding experience are improved.

[0021] Optionally, a first vertical upward stabilizing rod is fixedly arranged at the end of the upper surface of the arc-shaped part close to the opening, a first guide rail for guiding the first stabilizing rod is arranged on the inner top wall of the mounting frame, and the first guide rail is in the form of a circular arc and is in communication with the upper main track.

[0022] Optionally, a second vertical upward stabilizing rod is fixedly arranged at the end of the upper surface of the arc-shaped part away from the first stabilizing rod, a second guide rail for guiding the second stabilizing rod is arranged on the inner top wall of the mounting frame, the second guide rail is in the form of a circular arc and is in communication with the upper main track, the second guide rail and the first guide rail are axisymmetric around the rotating shaft, and when the rotating shaft moves, the first stabilizing rod, the rotating shaft and the second stabilizing rod are all in the upper main track.

[0023] By adopting the technical scheme, in the initial state, the rotating shaft is located in the main track, the first stabilizing rod is located at one end of the first guide track away from the main track, and the second stabilizing rod is located at one end of the second guide track away from the main track; when the support portion is pulled out of the mounting cavity, the first stabilizing rod rotates along with the arc-shaped portion and moves along the first guide track into the main track, and the second stabilizing rod rotates along with the arc-shaped portion and moves along the second guide track into the main track; when the support portion is transversely moved, the first stabilizing rod and the second stabilizing rod move along the extension direction of the main track, and the first stabilizing rod and the second stabilizing rod are located on both sides of the rotating shaft; when the handrail body is stored, the support portion is first pushed to move back to the initial position, at this time, the first stabilizing rod moves back to the position where the main track and the second guide track are communicated, the second stabilizing rod moves back to the position where the main track and the second guide track are communicated, the arc-shaped portion is moved back to the initial position by rotating the support portion, the first stabilizing rod moves back to the initial position along the first guide track, and the second stabilizing rod moves back to the initial position along the second guide track; through cooperation of the first stabilizing rod, the second stabilizing rod, and the first guide track and the second guide track, the stability of movement and use of the handrail body is increased, and therefore the convenience of use of the rear-row handrail and the riding experience of passengers are improved.

[0024] Optionally, a power-assisted belt is arranged on the outer side wall of the support portion close to the opening.

[0025] Through the above technical scheme, the passenger pulls the support portion to rotate by using the power-assisted belt, so as to improve the convenience of use of the handrail body.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The rotating shaft is pulled to rotate, the handrail body is driven to rotate out of the mounting cavity, then the rotating shaft is pushed, the sliding assembly drives the rotating shaft to slide, so as to drive the handrail body to slide along the length direction of the mounting frame, i.e., the extension direction of the mounting cavity, and after the sliding is completed, the positioning assembly positions the handrail body, so as to realize adjustment of the horizontal position of the handrail body, to meet the use requirements of passengers with different body sizes for the handrail body, and therefore the convenience of use of the rear-row handrail and the riding experience of passengers are improved.

[0028] 2. In the initial state, the first wave of the wave plate is engaged with one end of the arc-shaped part to limit the arc-shaped part and reduce the probability of rotation of the arc-shaped part. When in use, an external force is applied to pull the support part, and the support part drives the arc-shaped part to rotate. The arc-shaped part rotates and presses the wave plate, and the wave plate presses the spring, so that the arc-shaped part rotates to be parallel to the length direction of the mounting cavity. Then the support part is pushed, and the support part moves to drive the arc-shaped part to move. The teeth grooves on the arc-shaped part are sequentially engaged with the waves on the wave plate. When the support part is continuously pushed, the wave plate is continuously stressed to press the spring, so that the movement of the handrail body is not blocked. After the support part is moved to the position, the external force applied to the support part disappears. At this time, the teeth grooves on the arc-shaped part are engaged with the waves on the wave plate and are kept stable under the action of the spring. When it is needed to move again, an external force is artificially applied to continue to drive the arc-shaped part to press the wave plate, so as to realize the positioning of the handrail body and improve the convenience of positioning and moving of the handrail body, thereby improving the convenience of using the rear row handrail and the passenger's riding experience.

[0029] 3. The cooperation of the first stabilizing rod, the second stabilizing rod, the rotating shaft, the sliding block, the first guide rail, the second guide rail, and the main rail increases the stability of the movement and use of the handrail body, thereby improving the convenience of using the rear row handrail and the passenger's riding experience. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the present application;

[0031] Figure 2 is an exploded view of the mounting bracket and the handrail body in the present application;

[0032] Figure 3 is a partial sectional view of the mounting bracket in the present application;

[0033] Figure 4 is an exploded view of the handrail body and the sliding assembly in the present application;

[0034] Figure 5 is a sectional view of the main rail in the present application, in which the handrail body is in the storage state;

[0035] Figure 6 is a sectional view of the main rail in the present application, in which the handrail body is in the use state.

[0036] Fig. 1 is a mounting frame; 11 is a seat; 111 is a mounting cavity; 12 is an opening; 13 is a rotating shaft; 14 is an arc-shaped cavity; 15 is a first guide rail; 16 is a second guide rail; 2 is a handrail body; 21 is an arc-shaped part; 211 is a tooth groove; 22 is a support part; 23 is a leverage belt; 24 is a first stabilizing rod; 25 is a second stabilizing rod; 3 is a sliding assembly; 31 is a main rail; 311 is a sliding opening; 32 is a sliding block; 4 is a positioning assembly; 41 is a spring; 42 is a wave plate. DETAILED DESCRIPTION

[0037] The following will be described in detail below with reference to the accompanying drawings. Figures 1-6 The application is further described in detail.

[0038] The application discloses a car handrail positioning device.

[0039] Referring to Figure 1 and Figure 2 , a car handrail positioning device comprises a mounting frame 1 and a handrail body 2 rotatingly arranged in the mounting frame 1, the mounting frame 1 is arranged on a seat 11 in the back row of a car, the seat 11 has a horizontal mounting cavity 111 on the backrest, the mounting frame 1 is arranged in the mounting cavity 111 and has an opening 12 communicating with the mounting cavity 111, a vertical rotating shaft 13 is rotatingly arranged in the mounting frame 1, the handrail body 2 is fixedly arranged on the rotating shaft 13, a sliding assembly 3 is arranged in the mounting frame 1 for driving the rotating shaft 13 to slide along the length direction of the mounting frame 1, a positioning assembly 4 is arranged in the mounting frame 1 for positioning the handrail body 2, and in the initial state, the handrail body 2 is located in the mounting frame 1 and in the mounting cavity 111.

[0040] Referring to Figure 1 and Figure 2 , the mounting frame 1 is fixedly arranged in the mounting cavity 111, and the opening 12 of the mounting frame 1 faces the front end of the seat 11 and communicates with the mounting cavity 111.

[0041] Referring to Figure 2 and Figure 3 , the handrail body 2 comprises an arc-shaped part 21 and a support part 22 arranged integrally together, the rotating shaft 13 is located in the middle of the connecting part of the arc-shaped part 21 and the support part 22 and is perpendicular to the arc-shaped part 21 and the support part 22, the rotating shaft 13 is located on the central axis of the arc-shaped part 21, the diameter of the arc-shaped part 21 is greater than the width of the support part 22, and the outer surface of the arc-shaped part 21 away from the support part 22 has a plurality of arc-shaped tooth grooves 211.

[0042] Referring to Figure 1 , Figure 2 and Figure 3, one end of the mounting frame 1 is provided with an arc-shaped cavity 14, in the initial state, the arc-shaped part 21 is located in the arc-shaped cavity 14, and the diameter direction of the arc-shaped part 21 is perpendicular to the extension direction of the mounting cavity 111, the support part 22 is provided with a force borrowing belt 23 on the outer side wall close to the opening 12, pulling the force borrowing belt 23 drives the support part 22 to rotate out of the opening 12 and the mounting cavity 111, at this time, the arc-shaped part 21 is rotated to the diameter direction consistent with the extension direction of the mounting cavity 111.

[0043] Referring to Figure 2 , Figure 4 and Figure 5 , the rotating shaft 13 penetrates the handrail body 2 up and down, the sliding assembly 3 includes a main track 31 and a sliding block 32, the main track 31 is provided with two, the two main tracks 31 are respectively fixedly arranged on the inner top wall and the inner bottom wall of the mounting frame 1 and are oppositely arranged, the main track 31 extends along the length direction of the mounting frame 1, the rotating shaft 13 extends into the main track 31 at the upper and lower ends, and the main track 31 is provided with a sliding port 311 for the movement of the rotating shaft 13 on the outer wall close to the handrail body 2. The extension direction of the sliding port 311 is consistent with the length direction of the main track 31.

[0044] Referring to Figure 2 and Figure 4 , the sliding block 32 is provided with two and corresponds to the main track 31 one by one, the sliding block 32 is disc-shaped, and the two sliding blocks 32 are coaxially fixedly arranged on the upper and lower ends of the rotating shaft 13 and are slidingly arranged in the corresponding main track 31.

[0045] Referring to Figure 2 , Figure 4 and Figure 5 , the upper surface of the arc-shaped part 21 is fixedly provided with a first stabilizing rod 24 extending vertically upward at one end close to the opening 12, the inner top wall of the mounting frame 1 is provided with a first guide rail 15 for guiding the first stabilizing rod 24, the first stabilizing rod 24 extends into the first guide rail 15, the first guide rail 15 is arc-shaped and the axis line coincides with the rotating shaft 13, and the end of the first guide rail 15 away from the opening 12 is in communication with the main track 31 above.

[0046] Referring to Figure 2 , Figure 4 and Figure 5 , the upper surface of the arc-shaped part 21 is fixedly provided with a second stabilizing rod 25 extending vertically upward at one end away from the first stabilizing rod 24, the inner top wall of the mounting frame 1 is provided with a second guide rail 16 for guiding the second stabilizing rod 25, the second stabilizing rod 25 extends into the second guide rail 16, the second guide rail 16 is arc-shaped and the axis line coincides with the rotating shaft 13, and the end of the second guide rail 16 close to the opening 12 is in communication with the main track 31 above.

[0047] Referring to Figure 2 , Figure 4 andFigure 5 , the second guide rail 16 and the first guide rail 15 are axisymmetric around the rotating shaft 13, when the rotating shaft 13 moves along the sliding port 311, the first stabilizing rod 24, the rotating shaft 13 and the second stabilizing rod 25 all extend into the sliding port 311 and are located in the upper main rail 31, the position opposite to the first stabilizing rod 24 and the second stabilizing rod 25 on the lower surface of the arc-shaped part 21 is also provided with a stabilizing rod and a guide rail, the mounting mode and structure are consistent with those of the first stabilizing rod 24, the second stabilizing rod 25 and the first guide rail 15 and the second guide rail 16, which will not be described here.

[0048] With reference to Figure 2 , Figure 4 and Figure 5 , the positioning assembly 4 comprises springs 41 and wave plates 42, the springs 41 are provided in multiple groups, the multiple groups of springs 41 are fixedly arranged on the inner wall opposite to the opening 12 of the mounting frame 1 and horizontally extend towards the opening 12, the extension direction of the springs 41 is perpendicular to the sliding direction of the rotating shaft 13, and the wave plates 42 are fixedly arranged at one end of the multiple groups of springs 41 away from the mounting frame 1 and can cooperate with the toothed groove 211.

[0049] With reference to Figure 2 and Figure 5 , in the initial state, the wave plate 42 is engaged with one end of the arc-shaped part 21 at the first wave close to the arc-shaped part 21, so as to limit the arc-shaped part 21 and reduce the probability of rotation of the arc-shaped part 21, and the first stabilizing rod 24 is located at one end of the first guide rail 15 away from the main rail 31, and the second stabilizing rod 25 is located at one end of the second guide rail 16 away from the main rail 31.

[0050] With reference to Figure 2 , Figure 5 and Figure 6 , in use, an external force is applied to pull the supporting part 22, the supporting part 22 drives the arc-shaped part 21 to rotate, the arc-shaped part 21 drives the rotating shaft 13 to rotate while extruding the wave plate 42, the wave plate 42 extrudes the spring 41, so that the arc-shaped part 21 rotates to be parallel to the length direction of the mounting cavity 111, in this process, the first stabilizing rod 24 rotates with the arc-shaped part 21 and moves along the first guide rail 15 into the main rail 31, and the second stabilizing rod 25 rotates with the arc-shaped part 21 and moves along the second guide rail 16 into the main rail 31.

[0051] With reference to Figure 2 , Figure 5 and Figure 6Then the supporting part 22 is pushed, the supporting part 22 moves to drive the arc-shaped part 21 to move transversely, the tooth groove 211 on the arc-shaped part 21 is engaged with the waves on the wave plate 42 in sequence, when the supporting part 22 is continuously pushed, the wave plate 42 continuously extrudes the spring 41 under stress, so that the movement of the handrail body 2 is not blocked, and the first stabilizing rod 24 and the second stabilizing rod 25 move along the extension direction of the main track 31, and the first stabilizing rod 24 and the second stabilizing rod 25 are located on the two sides of the rotating shaft 13.

[0052] Referring to Figure 2 , Figure 5 and Figure 6 , after the supporting part 22 is moved to the position, the human force is no longer pushed to the supporting part 22, so that the external force applied to the supporting part 22 disappears, at this time, the tooth groove 211 on the arc-shaped part 21 is engaged with the waves on the wave plate 42, and is kept stable under the action of the spring 41.

[0053] Referring to Figure 2 , Figure 5 and Figure 6 , when the position needs to be adjusted, the external force is artificially applied to continuously drive the arc-shaped part 21 to extrude the wave plate 42, when the handrail body 2 is not needed, the reverse operation is performed to drive the handrail body 2 to move back to the mounting frame 1, so that the adjustment and positioning of the position of the handrail body 2 are realized, the use demand of the passengers with different body sizes for the handrail body 2 is met, and the convenience of use of the rear-row handrail and the passenger riding experience are improved.

[0054] The working principle of the embodiment of the application is as follows:

[0055] In use, the external force is applied to pull the supporting part 22, the supporting part 22 drives the arc-shaped part 21 to rotate, the arc-shaped part 21 drives the rotating shaft 13 to rotate while extruding the wave plate 42, the wave plate 42 extrudes the spring 41, so that the arc-shaped part 21 is rotated to be parallel to the length direction of the mounting cavity 111, in this process, the first stabilizing rod 24 rotates with the arc-shaped part 21 and moves into the main track 31 along the first guide track 15, and the second stabilizing rod 25 rotates with the arc-shaped part 21 and moves into the main track 31 along the second guide track 16.

[0056] Then the supporting part 22 is pushed, the supporting part 22 moves to drive the arc-shaped part 21 to move transversely, the tooth groove 211 on the arc-shaped part 21 is engaged with the waves on the wave plate 42 in sequence, when the supporting part 22 is continuously pushed, the wave plate 42 continuously extrudes the spring 41 under stress, so that the movement of the handrail body 2 is not blocked, and the first stabilizing rod 24 and the second stabilizing rod 25 move along the extension direction of the main track 31, and the first stabilizing rod 24 and the second stabilizing rod 25 are located on the two sides of the rotating shaft 13.

[0057] After the support part 22 is moved to the position, the human force no longer pushes the support part 22, so that the external force applied to the support part 22 disappears, at this time, the tooth groove 211 on the arc-shaped part 21 is engaged with the waves on the wave plate 42, and is kept stable under the action of the spring 41, so as to realize the adjustment and positioning of the position of the handrail body 2, so as to meet the use requirements of passengers with different body sizes for the handrail body 2, thereby improving the convenience of use of the rear-row handrail and the passenger's riding experience.

[0058] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automotive armrest positioning device, characterized by: The utility model provides a kind of armrest, including mounting frame (1) and rotatingly arranged in mounting frame (1) armrest body (2), the mounting frame (1) is arranged on the seat (11) of automobile rear row, the backrest of the seat (11) has horizontal installation cavity (111), the mounting frame (1) is arranged in installation cavity (111) and has the opening (12) with installation cavity (111) communication, the vertical rotating shaft (13) is rotationally arranged in the mounting frame (1), the armrest body (2) is fixed on the rotating shaft (13), the sliding assembly (3) for driving rotating shaft (13) to slide along the length direction of mounting frame (1) is arranged in the mounting frame (1), the positioning assembly (4) for positioning armrest body (2) is arranged in the mounting frame (1), initial state, the armrest body (2) is located in mounting frame (1) and is located in installation cavity (111).

2. The automotive armrest positioning device of claim 1, wherein: The armrest body (2) includes integrally arranged arc portion (21) and support portion (22), the rotating shaft (13) is located in the middle of the connecting place of arc portion (21) and support portion (22) and is perpendicular to arc portion (21) and support portion (22), one end of the mounting frame (1) has arc cavity (14), initial state, the arc portion (21) is located in arc cavity (14).

3. The automotive armrest positioning device of claim 2, wherein: The sliding assembly (3) includes: Main track (31), the main track (31) is arranged on the mounting frame (1) and extends along the length direction of mounting frame (1); Sliding block (32), the sliding block (32) is coaxially fixed on the rotating shaft (13) and is slidingly arranged in the main track (31).

4. The automotive armrest positioning device of claim 3, wherein: The rotating shaft (13) penetrates the armrest body (2) up and down, the main track (31) is provided with two, the two main tracks (31) are fixed on the inner top wall and the inner bottom wall of the mounting frame (1) respectively and are oppositely arranged, the sliding block (32) is provided with two and corresponds to the main track (31), the two sliding blocks (32) are fixed on the upper and lower ends of the rotating shaft (13) respectively and are slidingly arranged in the corresponding main track (31).

5. The automotive armrest positioning device of claim 3, wherein: The arc portion (21) has a plurality of arc-shaped tooth grooves (211) at one end away from the support portion (22), the positioning assembly (4) includes: Spring (41), the spring (41) is arranged on the inner side wall of the mounting frame (1) and extends horizontally, the extension direction of the spring (41) is perpendicular to the sliding direction of the rotating shaft (13); Wave plate (42), the wave plate (42) is fixed on the end of the spring (41) away from the mounting frame (1) and can cooperate with the tooth groove (211), in the initial state, the first wave of the wave plate (42) close to the arc portion (21) is engaged with one end of the arc portion (21).

6. The automotive armrest positioning device of claim 4, wherein: The upper surface of the arc portion (21) is fixed with a first stabilizing rod (24) vertically upward at one end close to the opening (12), the first guide rail (15) for guiding the first stabilizing rod (24) is arranged on the inner top wall of the mounting frame (1), the first guide rail (15) is arc-shaped and communicates with the main track (31) above.

7. The automotive armrest positioning device of claim 6, wherein: The arc-shaped part (21) is provided with a vertical upward second stabilizing rod (25) fixed at one end away from the first stabilizing rod (24) on the upper surface, the mounting rack (1) is provided with a second guide rail (16) for guiding the second stabilizing rod (25) on the inner top wall, the second guide rail (16) is in the form of a circular arc and communicates with the main rail (31) above, the second guide rail (16) and the first guide rail (15) are axisymmetric around the rotating shaft (13), when the rotating shaft (13) moves, the first stabilizing rod (24), the rotating shaft (13) and the second stabilizing rod (25) are all in the main rail (31) above.

8. The automotive armrest positioning device of claim 2, wherein: The support part (22) is provided with a force borrowing belt (23) on the outer side wall close to the opening (12) to facilitate force borrowing.

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