An armrest structure for a car seat

Abstract

This invention provides an armrest structure for a car seat, belonging to the field of automotive seat technology. It solves the problem that existing car rear seat armrest supports cannot be adjusted in angle during position adjustments. The car seat includes a backrest support with two horizontally opposite mounting plates fixed to it. The armrest structure includes an armrest support with a support rod hinged to the mounting plates and an adjusting rod slidably connected to the mounting plates. A counterweight and a movable gravity plate are hinged to the mounting plates, with the counterweight and adjusting rod located on either side of the hinge point of the movable gravity plate. The counterweight protrudes upwards to form a limiting protrusion. This car seat armrest structure ensures that the armrest support remains horizontal during backrest support angle adjustments, guaranteeing the stability of the armrest support during use.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat technology and relates to an armrest structure for an automotive seat. Background Technology

[0002] To improve passenger comfort, existing cars also use adjustable backrests for the rear seats, and armrests are hinged in the middle of the rear seats. However, most rear seat armrests only have two angle adjustments: flipping out of the seat and pressing into the rear seat back. When adjusting the angle of the rear seat back, the armrest will tilt upwards, affecting its usability.

[0003] Existing seat armrest locking structures, such as the Chinese patent application [Authorization Announcement No.: CN202504764U], disclose a mechanical gravity reset locking hook structure for a seat armrest. This structure includes an armrest frame connecting rod, one end of which is hinged to the backrest frame, and the other end to the armrest bracket. It also includes a gravity locking hook hinged to the backrest frame, with a hook groove on the armrest frame connecting rod. During the process of the backrest frame flipping from the seat cushion to the sitting position, the gravity locking hook, due to its own weight, generates a deflection angle towards the armrest frame connecting rod, causing the hook portion of the gravity locking hook to engage with the hook groove on the armrest frame connecting rod. When the backrest frame, carrying the armrest bracket, flips onto the seat cushion, the gravity locking hook, due to the squeezing action of the armrest frame connecting rod, disengages from the hook groove on the armrest frame connecting rod.

[0004] In the above structure, the hook groove of the armrest frame connecting rod cooperates with the gravity lock hook hinged on the backrest frame, realizing the folding of the armrest frame into the backrest frame and flipping it to a horizontal state. When the seat back is adjusted, the gravity lock hook and the hook groove are stably engaged, so that the angle between the seat back and the armrest support will not be adjusted with the angle of the seat back. Therefore, the armrest support will swing up or down when the seat back is adjusted. Since items such as water cups are usually placed on the armrest support, if the free end swings up or down, it will affect the placement of water cups and other items, and thus affect the use of the armrest support. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an armrest structure for automobile seats. The technical problem to be solved by this invention is: how to solve the problem that the armrest bracket cannot be adjusted in angle when the position of the rear seat of an existing automobile is adjusted.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An armrest structure for a car seat, the car seat including a backrest support, on which two horizontally opposite mounting plates are fixed. This armrest structure includes an armrest support, characterized in that a support rod hinged to the mounting plate and an adjusting rod slidably connected to the mounting plate are fixed to the armrest support. A counterweight and a movable gravity plate are hinged to the mounting plate. The counterweight and the adjusting rod are located on both sides of the hinge point of the movable gravity plate. The counterweight protrudes upward to form a limiting protrusion. When the armrest support is extended forward, the adjusting rod can push the lower end of the movable gravity plate forward, causing the upper end of the movable gravity plate to press against the limiting protrusion. A slot is provided on the lower edge of the upper part of the movable gravity plate. When the backrest support swings backward, the counterweight causes the limiting protrusion to swing forward relative to the mounting plate under the action of gravity, and the adjusting rod pushes the lower end of the movable gravity plate forward, causing the limiting protrusion to embed into the slot.

[0008] When a passenger needs to adjust the position of the backrest support, the car seat armrest in this application has two angle adjustment positions: position one and position two. Position one is the initial position of the backrest support. When the armrest support is extended forward, the adjusting rod can push the lower end of the moving gravity plate forward, causing the lower end of the moving gravity plate to rise upward, so that the upper end of the moving gravity plate presses against the limiting protrusion. The angle of the backrest support is the first position angle, which is 30° in this case, but other angles can also be set. The adjusting rod lifts the lower end of the moving gravity plate forward, and through the lever principle, the upper end of the moving gravity plate presses down and abuts against the limiting protrusion. At this time, the limiting protrusion is outside the latch, and the armrest support is in a horizontal state. When the passenger needs to adjust the position of the backrest support again, that is, when the backrest needs to be adjusted backward, the passenger needs to adjust the position of the backrest support. When the support is adjusted to position two, first retract the armrest support, then lower it. The counterweight rotates under its own weight, causing the limiting protrusion to swing forward relative to the mounting plate. At the same time, the adjusting rod pushes the lower end of the moving gravity plate forward. Under the lever principle, the upper end of the moving gravity plate swings downward, causing the limiting protrusion to embed into the slot. This adjusts the position of the adjusting rod, allowing it to slide upward along the mounting plate. By adjusting the position of the adjusting rod, when the angle of the backrest support is adjusted, the armrest support swings downward around the hinge point of the support rod near the backrest support at one end, while the other end is raised upward. This ensures that the armrest support remains horizontal after the backrest support is adjusted. In this case, the tilt angle of the backrest support in the second position is 35°.

[0009] The aforementioned structure, through the coordination of a support rod, an adjusting rod, a movable gravity plate, and a counterweight, enables the adjustment of the backrest bracket angle. By lowering the armrest bracket and adjusting the backrest bracket's tilt angle, the counterweight, under its own weight, adjusts the relative position of the counterweight and the mounting block according to the different tilt angles of the backrest bracket. The counterweight rotates under its own weight, pushing the movable gravity plate to swing, and causing the adjusting rod to slide along the mounting plate. This ensures that the armrest bracket remains in a horizontal position during the backrest bracket angle adjustment process, and the adjustment of the backrest bracket does not affect the normal use of the armrest bracket, thus guaranteeing the stability of the armrest bracket.

[0010] In the aforementioned armrest structure of the car seat, the counterweight is convex in shape, and the hinge point between the counterweight and the mounting plate is located between the limiting protrusion and the center of gravity of the counterweight.

[0011] The structure and center of gravity of the counterweight block are designed so that the limiting protrusion is always facing upwards, which facilitates the contact between the limiting protrusion and the moving gravity plate. Furthermore, by adjusting the center of gravity of the counterweight block, when the backrest bracket is tilted, the counterweight block can adjust its relative position to the mounting plate under its own weight, thereby achieving the purpose of adjusting the moving gravity plate and improving the convenience of armrest bracket adjustment.

[0012] In the aforementioned armrest structure of the car seat, the hinge point of the moving gravity plate is located diagonally above the hinge point of the counterweight block.

[0013] When the counterweight swings forward relative to the mounting plate, the adjusting rod also swings backward with the tilt of the backrest bracket. The lower end of the moving gravity plate swings upward, so that the limiting protrusion of the counterweight is inserted into the bayonet. Under the influence of its own weight, the upper end of the moving gravity plate will swing downward. Since the hinge point is located diagonally above the hinge point of the counterweight, the swing direction is towards the counterweight, which facilitates the insertion of the limiting protrusion after the counterweight swings relative to the mounting plate. This facilitates the positioning of the counterweight on the moving gravity plate after adjusting the second backrest bracket, improving the convenience and stability of positioning.

[0014] In the above-mentioned armrest structure of the car seat, the upper edge of the mounting plate is provided with an upper positioning stop. When the lower edge of the upper end of the moving gravity plate presses against the limiting protrusion, the upper edge of the upper end of the moving gravity plate abuts against the upper positioning stop. The front edge of the mounting plate is provided with a front positioning stop. When the limiting protrusion is embedded in the slot, the lower end of the moving gravity plate abuts against the front positioning stop.

[0015] The positioning mechanism not only relies on the locking and limiting of the counterweight and the moving gravity plate, but also incorporates an upper positioning stop and a front positioning stop. The upper positioning stop can press the lower edge of the upper end of the moving gravity plate against the limiting protrusion, while the limiting protrusion can press the upper edge of the upper end of the moving gravity plate against the upper positioning stop, thus achieving bidirectional locking. The front positioning stop can abut against the lower end of the moving gravity plate while the limiting protrusion is embedded in the bayonet, thereby improving the stability of the handrail bracket after positioning.

[0016] In the above-mentioned armrest structure of the car seat, the moving gravity plate is elongated and inclined from bottom to top toward the counterweight. The upper and lower corners of the moving gravity plate are rounded, and the upper and front positioning edges are straight.

[0017] The tilt direction of the moving weight plate facilitates its upper end to abut against the counterweight block, thereby achieving two-position limit. Therefore, on the one hand, it can play a positioning role for the moving weight plate, and on the other hand, it can facilitate the moving weight plate to quickly detach from the upper or front positioning edge after the counterweight block is released from positioning, making it convenient to fold up the handrail bracket and improving the convenience of handrail structure adjustment and positioning.

[0018] In the above-mentioned armrest structure of the car seat, the limiting protrusion is elongated and inclined, and the free end of the limiting protrusion has a planar limiting wall. The lower side wall of the moving gravity plate has an abutment wall, and the upper end of the moving gravity plate is located above the limiting protrusion. The limiting wall of the limiting protrusion can abut against the abutment wall in the vertical direction.

[0019] The combination of the limiting wall and the abutment wall allows the upper end of the moving gravity plate to be pressed against the upper positioning edge by the limiting protrusion when the counterweight rotates. Furthermore, the combination of the limiting wall and the abutment wall increases the contact area between the limiting protrusion and the moving gravity plate during pressing, resulting in a more stable abutment and further improving the stability of the handrail bracket after locking.

[0020] In the aforementioned armrest structure of the car seat, the limiting protrusion has a sliding surface that slopes backward at its lower end, and when the limiting protrusion is embedded in the slot, the side wall of the moving gravity plate abuts against the sliding surface.

[0021] The sliding surface design facilitates the positioning of the motion weight plate and also allows the limiting protrusion to be more smoothly embedded in the slot when positioning the armrest bracket, thus improving the speed of armrest bracket positioning.

[0022] In the aforementioned armrest structure of the car seat, a notch is provided on the side wall of the middle part of the moving gravity plate. The notch is arc-shaped, and the wall of the notch can abut against the outer wall of the adjustment rod.

[0023] The notch is arc-shaped, which can limit the adjustment rod and facilitate its support, making the positioning of the handrail bracket more stable.

[0024] In the above-mentioned armrest structure of the car seat, the notch has two arc segments with their center points offset from each other. Each arc segment can fit against the outer wall of the adjustment rod. The adjustment rod is cylindrical. When the adjustment rod abuts against any arc segment, the center line of the adjustment rod coincides with the center point of that arc segment. The outer wall of the adjustment rod can abut against the corresponding arc segment.

[0025] The two curved segments correspond to the two positions of the backrest support, ensuring that the curved segment corresponding to the adjustment rod can limit the adjustment rod regardless of which position it is in. This makes the positioning of the adjustment rod more stable and improves the stability of the armrest structure.

[0026] In the above-mentioned armrest structure of the car seat, the hinge point between the support rod and the mounting plate is located below the moving gravity plate. The mounting plate has an arc-shaped adjustment groove. The adjustment rod slides along the adjustment groove and can abut against the groove wall at the upper end of the adjustment groove. The center of the adjustment groove coincides with the axis of the support rod.

[0027] By incorporating an adjustment groove, the adjustment rod can be guided and limited as it slides along the groove. Furthermore, the adjustment rod slides around the axis of the support rod, facilitating the swing of the handrail support and improving the stability of the adjustment. The position of the hinge point of the support rod ensures that it provides support from below the handrail support, without affecting the swing of the upper adjustment rod, thus guaranteeing the stability of the handrail structure adjustment.

[0028] Compared with existing technologies, the armrest structure of this car seat has the following advantages:

[0029] 1. By incorporating support rods and adjusting rods, the angle of the armrest support can be adjusted. Through the cooperation of the moving gravity plate, counterweight, and upper positioning stop, when adjusting the angle of the backrest support, by lowering the armrest support again, the different tilt angles of the backrest support cause the counterweight to rotate relative to the mounting block due to its own weight, pushing the moving gravity plate to swing, and causing the adjusting rod to slide within the adjusting groove accordingly. This ensures that the armrest support remains in a horizontal position during the angle adjustment process, and the adjustment of the backrest support does not affect the normal use of the armrest support, thus guaranteeing the stability of the armrest support.

[0030] 2. In order to further improve the stability of the armrest bracket positioning when the backrest bracket is adjusted to the second position, it not only relies on the limiting protrusion being embedded in the slot, but also the lower end of the moving gravity plate abuts against the front positioning stop edge at the same time as it is embedded, so as to improve the stability of the armrest bracket after positioning. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the assembled structure of the present invention.

[0032] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0033] Figure 3 This is a side view of the backrest bracket in the first position after assembly of the present invention.

[0034] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0035] Figure 5 This is a side view of the backrest support in the second position after assembly of the present invention.

[0036] Figure 6 yes Figure 5 A magnified view of a section at point C.

[0037] Figure 7 This is a schematic diagram of the structure of the moving gravity plate in this invention.

[0038] Figure 8 This is a schematic diagram of the counterweight block in this invention.

[0039] In the diagram, 1. Backrest support; 2. Armrest support; 21. Support rod; 22. Adjustment rod; 23. Armrest bar; 3. Mounting plate; 31. Adjustment groove; 32. Upper positioning stop; 33. Front positioning stop; 4. Counterweight; 41. Limiting protrusion; 41a. Limiting wall; 41b. Sliding surface; 5. Moving gravity plate; 51. Bayonet; 52. Abutting wall; 53. Notch; 53a. Curved segment. Detailed Implementation

[0040] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0041] like Figure 1 As shown, the armrest structure of this car seat includes a backrest support 1, on which two horizontally opposite mounting plates 3 are fixed. The armrest structure includes an armrest support 2.

[0042] Specifically, such as Figure 1-5As shown, the handrail bracket 2 has a support rod 21 hinged to the mounting plate 3 and an adjusting rod 22 slidably connected to the mounting plate 3. The handrail bracket 2 also includes a U-shaped handrail 23, with the upper edges of both ends of the handrail 23 fixed to the adjusting rod 22 and the lower edges of both ends of the handrail 23 fixed to the support rod 21. A counterweight 4 and a moving gravity plate 5 are hinged to the mounting plate 3. The counterweight 4 and the adjusting rod 22 are located on both sides of the hinge point of the moving gravity plate 5, with the counterweight 4 facing upwards. The protrusion forms a limiting protrusion 41. When the armrest bracket 2 unfolds forward, the adjusting rod 22 can push the lower end of the moving gravity plate 5 forward so that the upper end of the moving gravity plate 5 presses against the limiting protrusion 41. A slot 51 is provided on the lower edge of the upper part of the moving gravity plate 5. When the backrest bracket 1 swings backward, the counterweight 4 causes the limiting protrusion 41 to swing forward relative to the mounting plate 3 under the action of gravity, and the adjusting rod 22 pushes the lower end of the moving gravity plate 5 forward so that the limiting protrusion 41 is embedded in the slot 51.

[0043] When a passenger needs to adjust the position of the backrest support 1, the car seat armrest in this application is equipped with two angle adjustment positions, namely position one and position two. Position one is the initial position of the backrest support 1. When the armrest support 2 is extended forward, the adjusting rod 22 can push the lower end of the moving gravity plate 5 forward, and the lower end of the moving gravity plate 5 is lifted upward, so that the upper end of the moving gravity plate 5 presses against the limiting protrusion 41. The angle of the backrest support 1 is the first angle, which is 30° in this case, but other angles can also be set. The adjusting rod 22 lifts the lower end of the moving gravity plate 5 upward. Through the lever principle, the upper end of the moving gravity plate 5 is pressed down and abuts against the limiting protrusion 41. At this time, the limiting protrusion 41 is located outside the latch 51, and the armrest support 2 is in a horizontal state. When the passenger needs to adjust the position of the backrest support 1 backward again, that is, when the backrest support 1 needs to be adjusted backward, the passenger needs to adjust the position of the backrest support 1. When adjusted to position two, first retract the armrest bracket 2, then lower it. The counterweight 4 rotates under its own weight and drives the limiting protrusion 41 to swing forward relative to the mounting plate 3. At the same time, the adjusting rod 22 pushes forward the lower end of the moving gravity plate 5. Under the action of the lever principle, the upper end of the moving gravity plate 5 swings downward, causing the limiting protrusion 41 to embed into the slot 51. This adjusts the position of the adjusting rod 22, allowing it to slide upward along the mounting plate 3. By adjusting the position of the adjusting rod 22, when the angle of the backrest bracket 1 is adjusted, the armrest bracket 2 swings downward around the hinge point of the support rod 21 near the backrest bracket 1 at one end, while the other end is lifted upward. This keeps the armrest bracket 2 in a horizontal state, ensuring that the armrest bracket 2 remains horizontal after the backrest bracket 1 is adjusted. In this case, the tilt angle of the backrest bracket 1 in the second position is 35°.

[0044] The above structure realizes the adjustment of the angle of the backrest bracket 1 by the cooperation of the support rod 21, the adjusting rod 22, the moving gravity piece 5 and the counterweight 4. When adjusting the angle of the backrest bracket 1, by putting down the armrest bracket 2 again, different tilting angles of the backrest bracket 1 cause the counterweight 4 to adjust the relative position between the counterweight 4 and the mounting block under the influence of its own gravity as the backward tilting angle of the backrest bracket 1 changes. The counterweight 4 rotates by relying on its own gravity and then pushes the moving gravity piece 5 to swing, and makes the adjusting rod 22 also slide along the mounting plate 3. Thus, during the process of adjusting the angle of the backrest bracket 1, the armrest bracket 2 is always in the horizontal position, and the adjustment of the backrest bracket 1 does not affect the normal use of the armrest bracket 2, ensuring the stability of the use of the armrest bracket 2.

[0045] As Figure 3-6 shown, the counterweight 4 is in a convex shape. The hinge point of the counterweight 4 and the mounting plate 3 is located between the limiting protrusion 41 and the center of gravity of the counterweight 4. The hinge point of the moving gravity piece 5 is located obliquely above the hinge point of the counterweight 4.

[0046] As Figure 3-6 shown, the limiting protrusion 41 is in a long strip shape. The free end of the limiting protrusion 41 has a planar limiting wall 41a. The side wall of the moving gravity piece 5 has an abutting wall 52. The upper end of the moving gravity piece 5 is located above the limiting protrusion 41. The limiting wall 41a of the limiting protrusion 41 can abut against the abutting wall 52 in the up and down direction. The upper edge of the mounting plate 3 is provided with an upper positioning stop edge 32. When the lower edge of the upper end of the moving gravity piece 5 presses against the limiting protrusion 41, the upper edge of the upper end of the moving gravity piece 5 abuts against the upper positioning stop edge 32. The front edge of the mounting plate 3 is provided with a front positioning stop edge 33. When the limiting protrusion 41 is embedded in the bayonet 51, the lower end of the moving gravity piece 5 abuts against the front positioning stop edge 33. The moving gravity piece 5 is in a long strip shape. The moving gravity piece 5 is inclined upward toward the counterweight 4. The corners at the upper end and the lower end of the moving gravity piece 5 are both in arc transition. The upper positioning stop edge 32 and the front positioning stop edge 33 are both in straight strip shapes. Specifically, the moving gravity piece 5 is in a factory shape.

[0047] As Figure 4 and Figure 8 shown, the counterweight 4 is in a convex shape. The hinge point of the counterweight 4 and the mounting plate 3 is located below the limiting protrusion 41. The limiting protrusion 41 has a sliding surface 41b with the lower end inclined backward. When the limiting protrusion 41 is embedded in the bayonet 51, the side wall of the moving gravity piece 5 abuts against the sliding surface 41b.

[0048] As Figure 4 and Figure 6 and Figure 7As shown, a notch 53 is provided on the side wall of the middle part of the moving gravity plate 5. The notch 53 is arc-shaped, and the opening wall of the notch 53 can abut against the outer wall of the adjusting rod 22. The notch 53 has two arc segments 53a with their center points staggered. Each arc segment 53a can fit against the outer wall of the adjusting rod 22. The adjusting rod 22 is cylindrical. When the adjusting rod 22 abuts against any arc segment 53a, the center line of the adjusting rod 22 coincides with the center point of the arc segment 53a. When the limiting protrusion 41 is inserted into the bayonet 51 or located outside the bayonet 51, the outer wall of the adjusting rod 22 abuts against the corresponding arc segment 53a.

[0049] like Figure 4 and Figure 6 As shown, the hinge point between the support rod 21 and the mounting plate 3 is located below the moving gravity plate 5. The mounting plate 3 has an arc-shaped adjustment groove 31. The adjustment rod 22 slides along the adjustment groove 31 and can abut against the groove wall at the upper end of the adjustment groove 31. The center of the adjustment groove 31 coincides with the axis of the support rod 21.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An armrest structure for a car seat, the car seat including a backrest support (1), wherein two horizontally opposite mounting plates (3) are fixed on the backrest support (1), and the armrest structure includes an armrest support (2), characterized in that, The handrail bracket (2) is fixedly connected to a support rod (21) hinged to the mounting plate (3) and an adjusting rod (22) slidably connected to the mounting plate (3). The mounting plate (3) is hinged to a counterweight (4) and a moving gravity plate (5). The counterweight (4) and the adjusting rod (22) are located on both sides of the hinge point of the moving gravity plate (5). The counterweight (4) protrudes upward to form a limiting protrusion (41). A slot (51) is opened on the lower edge of the upper end of the moving gravity plate (5). The moving gravity plate (5) is long and narrow. The moving gravity plate (5) is inclined from bottom to top towards the counterweight (4). The counterweight (4) is convex. The hinge point of the counterweight (4) and the mounting plate (3) is located between the limiting protrusion (41) and the center of gravity of the counterweight (4). When the backrest support (1) is in position one, the armrest support (2) unfolds forward, and the adjusting rod (22) can push the lower end of the moving gravity plate (5) forward to lift it up, so that the lower edge of the upper end of the moving gravity plate (5) presses against the limiting protrusion (41). The limiting protrusion (41) is located outside the bayonet (51), and the armrest support (2) is in a horizontal state. When it is necessary to adjust the backrest bracket (1) to position two, first put up the armrest bracket (2), then put down the armrest bracket (2). The counterweight (4) rotates under its own weight and drives the limiting protrusion (41) to swing forward relative to the mounting plate (3). The adjusting rod (22) pushes forward to the lower end of the moving gravity plate (5), so that the limiting protrusion (41) is embedded in the slot (51). The adjusting rod (22) can slide upward along the mounting plate (3), thereby keeping the armrest bracket (2) in a horizontal state.

2. The armrest structure of the automobile seat according to claim 1, characterized in that, The hinge point of the moving gravity plate (5) is located diagonally above the hinge point of the counterweight block (4).

3. The armrest structure of the automobile seat according to claim 1 or 2, characterized in that, The upper edge of the mounting plate (3) is provided with an upper positioning stop (32). When the lower edge of the upper end of the moving gravity plate (5) presses against the limiting protrusion (41), the limiting protrusion (41) is located outside the bayonet (51). The upper edge of the upper end of the moving gravity plate (5) abuts against the upper positioning stop (32). The front edge of the mounting plate (3) is provided with a front positioning stop (33). When the limiting protrusion (41) is embedded in the bayonet (51), the lower end of the moving gravity plate (5) abuts against the front positioning stop (33).

4. The armrest structure of the automobile seat according to claim 3, characterized in that, The upper and lower corners of the moving gravity plate (5) are rounded, and the upper positioning edge (32) and the front positioning edge (33) are both straight strips.

5. The armrest structure of the automobile seat according to claim 1 or 2, characterized in that, The limiting protrusion (41) is elongated and inclined. The free end of the limiting protrusion (41) has a planar limiting wall (41a). The lower side wall of the moving gravity plate (5) has an abutment wall (52). The upper end of the moving gravity plate (5) is located above the limiting protrusion (41). The limiting wall (41a) of the limiting protrusion (41) can abut against the abutment wall (52) in the vertical direction.

6. The armrest structure of the automobile seat according to claim 1 or 2, characterized in that, The limiting protrusion (41) has a sliding surface (41b) that is inclined backward at the lower end. When the limiting protrusion (41) is embedded in the bayonet (51), the side wall of the moving gravity piece (5) abuts against the sliding surface (41b).

7. The armrest structure of the automobile seat according to claim 1 or 2, characterized in that, A notch (53) is provided on the side wall of the middle part of the motion gravity plate (5). The notch (53) is arc-shaped, and the opening wall of the notch (53) can abut against the outer side wall of the adjusting rod (22).

8. The armrest structure of the automobile seat according to claim 7, characterized in that, The notch (53) has two arc segments (53a) with their center points offset from each other. Each arc segment (53a) can fit against the outer wall of the adjusting rod (22). The adjusting rod (22) is cylindrical. When the adjusting rod (22) abuts against any arc segment (53a), the center line of the adjusting rod (22) coincides with the center point of the arc segment (53a). The outer wall of the adjusting rod (22) can abut against the corresponding arc segment (53a).

9. The armrest structure of the automobile seat according to claim 1 or 2, characterized in that, The hinge point between the support rod (21) and the mounting plate (3) is located below the moving gravity plate (5). The mounting plate (3) has an arc-shaped adjustment groove (31). The adjustment rod (22) slides along the adjustment groove (31) and can abut against the groove wall at the upper end of the adjustment groove (31). The center of the adjustment groove (31) coincides with the axis of the support rod (21).

Images