Rear seat electric small table plate linkage structure and seat armrest

Abstract

The invention provides a rear-row seat electric small table plate linkage structure and a seat armrest, and relates to the technical field of automobile small table plate equipment, and the rear-row seat electric small table plate linkage structure comprises a table plate bearing piece, a mounting base, a translation assembly and a multi-connecting-rod lifting assembly; the follow-up base is fixedly installed on the translation assembly, one end of the driving connecting rod and one end of the driven connecting rod are pivoted to the follow-up base, and a torsional spring is arranged between the driving connecting rod and the translation assembly so that the driving connecting rod can have the swing tendency; a rotating piece is arranged at the bottom of the table plate bearing piece, a rotating bearing plate is arranged on the rotating piece, and the driving connecting rod and the driven connecting rod are both in pivot joint with the rotating bearing plate; a linkage unlocking piece is arranged on the driven connecting rod, a linkage sliding groove for the linkage unlocking piece to slide is formed in the bottom of the rotating bearing plate, a rotation stopping block is eccentrically arranged at the bottom of the rotating piece, and a rotation stopping groove matched with the rotation stopping block is formed in the linkage unlocking piece. The technical effect that the rear-row small table board is convenient to use is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile tray table equipment, and in particular to a linkage structure of an electric tray table for a rear seat and a seat armrest. Background Art

[0002] In recent years, with the continuous development of automobile technology and the improvement of living standards, people's requirements for automobiles have gradually increased. For passengers, seats are required to have additional storage and desk functions for light office work. Now vehicles have added small tables on the back of the front seats to meet these functional requirements.

[0003] However, the table is placed on the back of the front chair, which greatly affects the spatial position of the table, and there are third-party constraints on human-computer interaction. Moreover, after using the small table, it needs to be manually reset and folded, which is time-consuming and laborious, and the interactive experience is not good. Summary of the invention

[0004] The purpose of the present invention is to provide a linkage structure of an electric small table for rear seats and a seat armrest to alleviate the technical problem of the inconvenience of using the small table for rear seats in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a rear seat electric small table linkage structure, including a table support, a mounting base, a translation assembly, and a multi-link lifting assembly;

[0006] The translation assembly is mounted on the mounting base, the multi-link lifting assembly is mounted on the translation assembly, and the table support is mounted on the multi-link lifting assembly;

[0007] The multi-link lifting assembly comprises a follower base, an active link and a driven link, wherein the follower base is fixedly mounted on the translation assembly, one end of the active link and the driven link are pivotally connected to the follower base, and the other end is pivotally connected to the table support member, and a torsion spring is arranged between the active link and the translation assembly so that the active link has a tendency to swing;

[0008] A rotating member is disposed at the bottom of the table support member, and a rotating support plate is disposed on the rotating member, so that the table support member can rotate relative to the rotating support plate, and both the active connecting rod and the driven connecting rod are pivotally connected to the rotating support plate;

[0009] The driven connecting rod is provided with a linkage unlocking member, the bottom of the rotating support plate is provided with a linkage sliding groove for the linkage unlocking member to slide, a stop block is eccentrically provided at the bottom of the rotating member, and the linkage unlocking member is provided with a stop groove adapted to the stop block.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an auxiliary connecting plate is provided at the bottom of the above-mentioned rotating support plate, and one end of the active connecting rod and the driven connecting rod are pivotally connected to the auxiliary connecting plate.

[0011] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the linkage unlocking member comprises a linkage bracket, and the linkage bracket is fixedly disposed between the two driven connecting rods;

[0012] A linkage rod is pivotally connected to the linkage bracket, a linkage slider is pivotally connected to one end of the linkage rod away from the linkage bracket, and the anti-rotation groove is arranged in the middle of the linkage slider;

[0013] A linkage sliding groove adapted to the linkage sliding block is arranged at the bottom of the rotating support plate.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the front end of the linkage sliding block is smooth and has no protrusions.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the linkage bracket is T-shaped.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a stop-rotation limit plate is provided on the above-mentioned mounting base, the stop-rotation limit plate is located below the follower base, and the end of the active connecting rod away from the table top supporting member has a limit stop rod adapted to the stop-rotation limit plate.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a rotation-stopping seat is provided on the above-mentioned follower base, and a rotation-stopping groove adapted to the rotation-stopping seat is provided on the limiting stop rod.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the translation assembly includes a motor, a screw and a screw nut;

[0019] The motor is fixed on the mounting base, the lead screw is in driving connection with the motor, the lead screw nut is mounted on the bottom of the follower base, and the lead screw nut is in driving connection with the lead screw.

[0020] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the translation assembly further includes a translation guide rod, and the translation guide rod is disposed on the mounting base;

[0021] The follower base is provided with a translation slide seat adapted to the translation guide rod.

[0022] In a second aspect, an embodiment of the present invention provides a seat armrest, including the rear seat electric small table linkage structure.

[0023] Beneficial effects:

[0024] The present invention provides a linkage structure of a small electric table for rear seats, comprising a table support, a mounting base, a translation assembly and a multi-link lifting assembly; the translation assembly is mounted on the mounting base, the multi-link lifting assembly is mounted on the translation assembly, and the table support is mounted on the multi-link lifting assembly; the multi-link lifting assembly comprises a follower base, an active link and a driven link, the follower base is fixedly mounted on the translation assembly, one end of the active link and the driven link are pivotally connected to the follower base, and the other end is pivotally connected to the table support, the active link and the driven link are pivotally connected to the follower base, and the active link and the driven link are pivotally connected to the table support. A torsion spring is arranged between the connecting rod and the translation assembly so that the active connecting rod has a tendency to swing; a rotating part is arranged at the bottom of the table support, and a rotating support plate is arranged on the rotating part so that the table support can rotate relative to the rotating support plate, and both the active connecting rod and the driven connecting rod are pivotally connected to the rotating support plate; a linkage unlocking part is arranged on the driven connecting rod, and a linkage slide groove for sliding the linkage unlocking part is arranged at the bottom of the rotating support plate, and a stop block is eccentrically arranged at the bottom of the rotating part, and a stop groove adapted to the stop block is opened on the linkage unlocking part.

[0025] Specifically, when the user uses the electric small table of the rear seat, the translation assembly can drive the multi-link lifting assembly to lift the table support, thereby lifting the small table on the table support for user use; during the initial use process, the user triggers the control button, and the control button can control the translation assembly to work, thereby driving the multi-link lifting assembly to reset. During this process, the follower base of the multi-link lifting assembly can move with the translation assembly. During the movement of the follower base, the active link swings under the action of the torsion spring, so that the active link drives the driven link to rotate, so that the rotating support plate is lifted. During the lifting process, the rotation of the driven link can drive the linkage unlocking member thereon to slide relative to the linkage slide groove at the bottom of the rotating support plate, thereby disengaging the linkage unlocking member from the eccentrically arranged anti-rotation block at the bottom of the rotating member, so that the user can rotate the rotating member, that is, the user can rotate the table support, so that the user can rotate the small table set on the table support, and the small table can be moved vertically. When the user needs to fold and reset the small table board after using it, the translation assembly can drive the follower base to reset, and the active connecting rod and the driven connecting rod on the follower base will swing downward, thereby causing the small table board to descend, and in the process of the driven connecting rod swinging downward, the driven connecting rod will drive the linkage unlocking member to move in the linkage slide groove, and the linkage unlocking member can abut against the stop block at the bottom of the rotating member, and the linkage unlocking member can push the stop block to rotate around the center of the rotating member, so that when the stop block rotates to the direction of the connecting line between the center of the rotating member and the center of the stop groove, the stop block can fall into the stop groove of the linkage unlocking member, and during this process, the rotating member will rotate, and the rotating member can drive the table board supporting member to rotate, that is, the rotating member can drive the small table board to rotate from the horizontal position back to the vertical position, so that during the descent and reset process of the small table board, the user does not need to reset the horizontal small table board, and the small table board can be automatically reset and then folded.

[0026] The embodiment of the present invention provides a seat armrest, including a rear seat electric small table linkage structure. Compared with the prior art, the seat armrest has the above advantages, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1A schematic diagram of a rear seat electric tray table linkage structure provided by an embodiment of the present invention being installed and used in a seat armrest and the seat armrest being unfolded to a longitudinal position;

[0029] Figure 2 A schematic diagram of a rear seat electric tray table linkage structure provided by an embodiment of the present invention being installed and used in a seat armrest and the seat armrest being deployed;

[0030] Figure 3 A schematic diagram of a rear seat electric tray table linkage structure provided by an embodiment of the present invention being installed and used in a seat armrest and the seat armrest being unfolded to a horizontal position;

[0031] Figure 4 A schematic diagram of a linkage structure of an electric small table for a rear seat provided in an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of a linkage structure of an electric small table for a rear seat provided in an embodiment of the present invention;

[0033] Figure 6 An internal schematic diagram of a linkage structure of an electric small table for a rear seat provided in an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of the internal structure of the linkage structure of the rear seat electric tray table provided in an embodiment of the present invention.

[0035] icon:

[0036] 100 - table support; 110 - rotating support plate; 111 - linkage slide; 112 - auxiliary connecting plate; 120 - rotating member; 121 - anti-rotation block;

[0037] 200 - mounting base; 210 - anti-rotation limit plate;

[0038] 300 - translation assembly; 310 - motor; 320 - lead screw; 330 - lead screw nut; 340 - translation guide rod;

[0039] 400 - multi-link lifting assembly; 410 - follow-up base; 411 - anti-rotation block seat; 412 - translation slide; 420 - synchronization rod; 430 - active connecting rod; 431 - torsion spring; 432 - limit stop rod; 433 - anti-rotation slot; 434 - roller; 440 - driven connecting rod; 450 - linkage unlocking member; 451 - anti-rotation slot; 452 - linkage bracket; 453 - linkage rod; 454 - linkage slide. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0045] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the present embodiment provides a linkage structure of a rear seat electric small table, including a table support 100, a mounting base 200, a translation assembly 300 and a multi-link lifting assembly 400; the translation assembly 300 is mounted on the mounting base 200, the multi-link lifting assembly 400 is mounted on the translation assembly 300, and the table support 100 is mounted on the multi-link lifting assembly 400; the multi-link lifting assembly 400 includes a follower base 410, an active link 430 and a driven link 440, the follower base 410 is fixedly mounted on the translation assembly 300, one end of the active link 430 and the driven link 440 are both pivotally connected to the follower base 410, and the other end is pivotally connected to the table support 100, the active link 430 and the driven link 440 are both pivotally connected to the follower base 410, and the other end is pivotally connected to the table support 100, A torsion spring 431 is arranged between 430 and the translation assembly 300 so that the active connecting rod 430 has a tendency to swing; a rotating member 120 is arranged at the bottom of the table support member 100, and a rotating support plate 110 is arranged on the rotating member 120 so that the table support member 100 can rotate relative to the rotating support plate 110, and both the active connecting rod 430 and the driven connecting rod 440 are pivotally connected to the rotating support plate 110; a linkage unlocking member 450 is arranged on the driven connecting rod 440, and a linkage sliding groove 111 for sliding of the linkage unlocking member 450 is arranged at the bottom of the rotating support plate 110, and a stop block 121 is eccentrically arranged at the bottom of the rotating member 120, and a stop groove 451 adapted to the stop block 121 is opened on the linkage unlocking member 450.

[0046] Specifically, when the user uses the electric small table on the rear seat, the translation assembly 300 can drive the multi-link lifting assembly 400 to lift the table support 100, so that the small table on the table support 100 is lifted for the user to use; during the initial use, the user triggers the control button, and the control button can control the translation assembly 300 to work, thereby driving the multi-link lifting assembly 400 to reset. During this process, the follower base 410 of the multi-link lifting assembly 400 can move with the translation assembly 300. During the movement of the follower base 410, the active link 430 is moved by the torsion spring 431. The active link 430 drives the driven link 440 to rotate, so that the rotating support plate 110 is lifted. During the lifting process, the rotation of the driven link 440 can drive the linkage unlocking member 450 thereon to slide relative to the linkage sliding groove 111 at the bottom of the rotating support plate 110, so that the linkage unlocking member 450 is disengaged from the anti-rotation block 121 eccentrically arranged at the bottom of the rotating member 120, so that the user can rotate the rotating member 120, that is, the user can rotate the table support member 100, so that the user can rotate the small table board arranged on the table support member 100, and the small table board can be rotated from the longitudinal direction to the transverse direction. When the user needs to fold and reset the small table after using it, the translation assembly 300 can drive the follower base 410 to reset, and the active connecting rod 430 and the driven connecting rod 440 on the follower base 410 will swing downward, so that the small table will be lowered, and when the driven connecting rod 440 swings downward, the driven connecting rod 440 will drive the linkage unlocking member 450 to move in the linkage slide groove 111, and the linkage unlocking member 450 can engage with the stop block 121 at the bottom of the rotating member 120. The locking member 450 is in contact with the rotating member 120, and the locking member 450 can push the stop block 121 to rotate around the center of the rotating member 120, so that when the stop block 121 rotates to the direction of the connecting line between the center of the rotating member 120 and the center of the stop groove 451, the stop block 121 can fall into the stop groove 451 of the locking member 450. During this process, the rotating member 120 will rotate, and the rotating member 120 can drive the table support member 100 to rotate, that is, the rotating member 120 can drive the small table to rotate from horizontal to vertical, so that during the process of the small table being lowered and reset, the user does not need to reset the horizontal small table, and the small table can be automatically reset and then folded.

[0047] The user may control the operation of the translation component 300 by pressing keys or by touching buttons, etc. The technicians in this field may decide the triggering method of the translation component 300 by themselves, as long as the translation component 300 can be controlled.

[0048] An auxiliary connecting plate 112 is provided at the bottom of the rotating support plate 110, and one end of the active connecting rod 430 and the driven connecting rod 440 are pivotally connected to the auxiliary connecting plate 112. When the active connecting rod 430 and the driven connecting rod 440 swing up and down, they can drive the rotating support plate 110 to rise and fall.

[0049] The rotating member 120 has a damping function, so that the rotating support plate 110 can remain stable.

[0050] Among them, a synchronization rod 420 is arranged between the two active connecting rods 430, and a torsion spring 431 is sleeved on the synchronization rod 420. One end of the torsion spring 431 abuts against the active connecting rod 430, and the other end abuts against the follower base 410, so that the active connecting rod 430 can swing relative to the follower base 410.

[0051] See also Figure 1 - Figure 7 As shown, in the optional scheme of this embodiment, the linkage unlocking member 450 includes a linkage bracket 452, which is fixedly arranged between the two driven connecting rods 440; a linkage rod 453 is pivotally connected to the linkage bracket 452, and a linkage slider 454 is pivotally connected to the end of the linkage rod 453 away from the linkage bracket 452, and a stop groove 451 is provided in the middle of the linkage slider 454; a linkage slide groove 111 adapted to the linkage slider 454 is provided at the bottom of the rotating support plate 110.

[0052] The front end of the linkage slider 454 is smooth and has no protrusions.

[0053] The linkage bracket 452 is T-shaped.

[0054] Specifically, the outer fixing plate of the rotating member 120 is fixedly mounted on the rotating support plate 110, the main body of the rotating member 120 is connected to the table support member 100 by bolts, and the bottom of the rotating support plate 110 is provided with an auxiliary connecting plate 112, which is pivotally connected to the active connecting rod 430 and the driven connecting rod 440 of the multi-link lifting assembly 400, so that the active connecting rod 430 and the driven connecting rod 440 support the rotating support plate 110. The middle rotating part of the rotating member 120 is connected to the table support member 100, so that the table top can rotate relative to the rotating support plate 110.

[0055] See also Figure 1 - Figure 7 As shown, in an optional scheme of this embodiment, a stop-rotation limit plate 210 is provided on the mounting base 200, and the stop-rotation limit plate 210 is located below the follower base 410, and the end of the active connecting rod 430 away from the table top supporting member 100 has a limit stop rod 432 adapted to the stop-rotation limit plate 210.

[0056] A rotation-stopping seat 411 is disposed on the follower base 410 , and a rotation-stopping slot 433 adapted to the rotation-stopping seat 411 is disposed on the limiting stop rod 432 .

[0057] Specifically, in the initial state, the limit stop rod 432 is limited by the anti-rotation limit plate 210 on the mounting base 200 , so that the active connecting rod 430 cannot swing upward under the action of the torsion spring 431 .

[0058] In addition, when the table support 100 is lifted, the anti-rotation slot 433 on the active connecting rod 430 can abut against the anti-rotation stop seat 411 on the follower base 410, thereby keeping the active connecting rod 430 in a vertical state.

[0059] In addition, a roller 434 is provided at the end of the limit stop rod 432. When the limit stop rod 432 moves to the extreme position along with the active connecting rod 430, the roller 434 first contacts with other components, thereby facilitating the rotation of the active connecting rod 430 and preventing the active connecting rod 430 from getting stuck. For example, when the small table top is reset, the roller 434 of the limit stop rod 432 first contacts with the anti-rotation limit plate 210, thereby facilitating the active connecting rod 430 to start rotating from the vertical to the horizontal direction.

[0060] See also Figure 1 - Figure 7 As shown, in an optional scheme of this embodiment, the translation assembly 300 includes a motor 310, a screw rod 320 and a screw nut 330; the motor 310 is fixed on the mounting base 200, the screw rod 320 is transmission-connected to the motor 310, the screw nut 330 is installed at the bottom of the follower base 410, and the screw nut 330 is transmission-connected to the screw rod 320.

[0061] The translation assembly 300 further includes a translation guide rod 340 , which is disposed on the mounting base 200 ; and a translation slide 412 adapted to the translation guide rod 340 is disposed on the follower base 410 .

[0062] It should be pointed out that when the multi-link lifting assembly 400 drives the desktop panel to lift and the driven link 440 swings upward, the driven link 440 can drive the linkage bracket 452 fixed on the driven link 440 to rotate. The rotation of the linkage bracket 452 can pull the linkage rod 453 to move, thereby driving the linkage slider 454 to slide in the linkage slide groove 111, so that the linkage slider 454 is disengaged from the stop block 121 at the bottom of the rotating member 120, thereby releasing the restriction on the rotating member 120, allowing the rotating member 120 to rotate, thereby allowing the user to rotate the desktop panel.

[0063] It should be noted that when the unfolded small table assembly is folded, the user triggers the control button set on the seat armrest mounting base 200, so that the translation assembly 300 works to drive the small table assembly to retract. During the retraction process, the user can stop the horizontal small table. When the multi-link lifting assembly 400 swings with the translation assembly 300 for recovery, the driven connecting rod 440 drives the linkage bracket 452 to rotate, the linkage bracket 452 drives the linkage rod 453 to move, and the linkage rod 453 drives the linkage slider 454 to slide in the linkage slide groove 111 of the rotating support plate 110. During the sliding process of the linkage slider 454, the linkage slider 454 can push the stop block 121 eccentrically set at the bottom of the rotating member 120 to move. The action of the linkage slider 454 on the stop block 121 can cause the rotating member 120 to shift gears, thereby resetting the horizontal desktop panel, and finally the stop block 121 will move to the stop groove 451 on the linkage slider 454.

[0064] It should be pointed out that the small table on the seat armrest with a small table provided in the present embodiment is arranged on the seat armrest of the car seat, and the seat armrest can be rotated and opened relative to the rear seat, and can be retracted into the seat back when not in use, so that the rear seat can accommodate three passengers. When the passengers need to use the small table, the seat armrest with a small table provided in the present embodiment can be unfolded, and when the rear table is opened, it is always in a horizontal state and is not affected by the change of the backrest angle, and does not affect the use.

[0065] The present embodiment provides a seat armrest, including a linkage structure for a rear seat electric small table.

[0066] Specifically, compared with the prior art, the present embodiment has the advantages of the above-mentioned rear seat electric small table linkage structure, which will not be described in detail here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linkage structure for an electric small table in a rear seat, characterized in that: include: A table support (100), a mounting base (200), a translation assembly (300) and a multi-link lifting assembly (400); The translation assembly (300) is mounted on the mounting base (200), the multi-link lifting assembly (400) is mounted on the translation assembly (300), and the table support (100) is mounted on the multi-link lifting assembly (400); The multi-link lifting assembly (400) comprises a follower base (410), an active link (430) and a driven link (440); the follower base (410) is fixedly mounted on the translation assembly (300); one end of the active link (430) and the driven link (440) are pivotally connected to the follower base (410), and the other end is pivotally connected to the table support (100); a torsion spring (431) is provided between the active link (430) and the translation assembly (300) so that the active link (430) has a tendency to swing; A rotating member (120) is disposed at the bottom of the table support member (100), and a rotating support plate (110) is disposed on the rotating member (120) so that the table support member (100) can rotate relative to the rotating support plate (110), and both the active connecting rod (430) and the driven connecting rod (440) are pivotally connected to the rotating support plate (110); The driven connecting rod (440) is provided with a linkage unlocking member (450), the bottom of the rotating support plate (110) is provided with a linkage sliding groove (111) for the linkage unlocking member (450) to slide, the bottom of the rotating member (120) is eccentrically provided with a stop block (121), and the linkage unlocking member (450) is provided with a stop groove (451) adapted to the stop block (121).

2. The rear seat electric table linkage structure according to claim 1, characterized in that: An auxiliary connecting plate (112) is provided at the bottom of the rotating support plate (110), and one end of each of the active connecting rod (430) and the driven connecting rod (440) is pivotally connected to the auxiliary connecting plate (112).

3. The rear seat electric tray table linkage structure according to claim 2 is characterized in that: The linkage unlocking member (450) comprises a linkage bracket (452), and the linkage bracket (452) is fixedly arranged between the two driven connecting rods (440); A linkage rod (453) is pivotally connected to the linkage bracket (452), a linkage slider (454) is pivotally connected to one end of the linkage rod (453) away from the linkage bracket (452), and the anti-rotation groove (451) is provided in the middle of the linkage slider (454); The bottom of the rotating support plate (110) is provided with a linkage sliding groove (111) adapted to the linkage sliding block (454).

4. The rear seat electric tray table linkage structure according to claim 3 is characterized in that: The front end of the linkage slider (454) is smooth and has no protrusions.

5. The rear seat electric tray table linkage structure according to claim 3 is characterized in that: The linkage bracket (452) is T-shaped.

6. The rear seat electric tray table linkage structure according to claim 3, characterized in that: A stop plate (210) is provided on the mounting base (200), and the stop plate (210) is located below the follower base (410). The end of the active connecting rod (430) away from the table support (100) has a limit stop rod (432) adapted to the stop plate (210).

7. The rear seat electric tray table linkage structure according to claim 6, characterized in that: The follower base (410) is provided with a rotation-stopping seat (411), and the position-limiting blocking rod (432) is provided with a rotation-stopping slot (433) adapted to the rotation-stopping seat (411).

8. The rear seat electric tray table linkage structure according to claim 1, characterized in that: The translation assembly (300) comprises a motor (310), a screw rod (320) and a screw rod nut (330); The motor (310) is fixed on the mounting base (200), the screw rod (320) is drivingly connected to the motor (310), the screw rod nut (330) is mounted on the bottom of the follower base (410), and the screw rod nut (330) is drivingly connected to the screw rod (320).

9. The rear seat electric tray table linkage structure according to claim 8, characterized in that: The translation assembly (300) further comprises a translation guide rod (340), wherein the translation guide rod (340) is arranged on the mounting base (200); The follower base (410) is provided with a translation sliding seat (412) adapted to the translation guide rod (340).

10. A chair armrest, characterized in that: It comprises the linkage structure of the electric small table for the rear seats as described in any one of claims 1 to 9.

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