Connecting rod structure and automobile folding table plate with same

Abstract

The utility model relates to the technical field of connecting rod structures, in particular to a connecting rod structure and an automobile folding table plate with the same, which comprise a fixing support, a first connecting rod, a second connecting rod and a connecting rod mounting support. One ends of the connecting rod I and the connecting rod II are hinged with the fixed bracket, and the other ends are hinged with the connecting rod mounting bracket; a ratchet wheel is arranged at the hinged position of the first connecting rod and the connecting rod installation support, and a pawl is hinged to the connecting rod installation support. One end of the pawl is rotationally meshed with the ratchet wheel and used for limiting the rotating angle of the first connecting rod, and the pawl is sleeved with a pawl torsional spring; a ratchet wheel reversing block is arranged on the inner side of the hinged position of the second connecting rod and the connecting rod installation support, hinged to the fixing support and connected with a pawl reversing block torsional spring in a sleeved mode. The pawl is in lap joint with the ratchet wheel reversing block. The fixing support, the first connecting rod, the second connecting rod, the connecting rod mounting support, the ratchet wheel, the pawl and the like are adopted, so that the automobile folding table plate can be stably folded and unfolded through simple operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to folding table board technical field, more specifically relates to a connecting rod structure and have connecting rod structure's car folding table board. BACKGROUND

[0002] Car folding table board as one of the in-car convenience facilities, is usually used to provide additional plane support, to place food, electronic equipment etc. The common structure of traditional folding table board includes support frame, connecting component (such as hinge) and support leg. And the core part of folding mechanism is usually realized through a connecting rod system to fold and unfold the table board, especially the folding connecting rod structure.

[0003] The folding structure of connecting rod: generally speaking, the connecting rod of folding table board needs to have certain stability and durability, can keep stable when folding and unfolding, and avoid excessive space occupation. The connecting rod is usually composed of two to three aluminum alloy or stainless steel strips, connected through hinge or sliding slot, forming a similar "Z" shape or triangular folding structure.

[0004] The function of connecting rod in use: the connecting rod of folding table board needs to support the table top when the table board is unfolded, and can make the table top fit the rear of seat or other fixed position through the folding mechanism of connecting rod when folding. The design of folding mechanism requires that the activity angle, carrying capacity and locking mechanism of connecting rod can work stably in different use states.

[0005] It is necessary to consider how to avoid the loosening, wear or instability of connecting rod in long-term use, and also to ensure the simplicity of operation, without increasing the complexity of driver or passenger in use. INVENTION CONTENTS

[0006] In order to solve the above problems, the utility model provides a connecting structure with simple operation and one-way locking function, and a car folding table board with the connecting rod structure.

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme, mainly including:

[0008] A connecting rod structure, comprising a fixed support, a connecting rod one, a connecting rod two and a connecting rod mounting support, one end of the connecting rod one and the connecting rod two is hinged with the fixed support, the other end is hinged with the connecting rod mounting support, the hinged place of the connecting rod one and the connecting rod mounting support is provided with a ratchet wheel, and a pawl is hinged on the connecting rod mounting support, one end of the pawl is rotatably engaged with the ratchet wheel, for limiting the rotation angle of the connecting rod one, and a pawl torsion spring is sleeved on the pawl, a ratchet wheel reversing block is arranged on the inner side of the hinged place of the connecting rod two and the connecting rod mounting support, the ratchet wheel reversing block is hinged with the fixed support, and a pawl reversing block torsion spring is sleeved, the pawl is overlapped with the ratchet wheel reversing block.

[0009] In a specific embodiment, the fixed support and the link rod mounting support are arranged in parallel when the link rod one and the link rod two are not under stress; the rod body of the link rod two comprises a parallel rod part, a connecting rod part and an arc-shaped rod head, the link rod two is provided with a parallel rod part parallel to the fixed support at the hinged end of the link rod two and the fixed support, and the link rod two is provided with an arc-shaped rod head recessed inwardly to the side of the link rod mounting support at the hinged end of the link rod two and the link rod mounting support, and the parallel rod part and the arc-shaped rod head are connected through the connecting rod part.

[0010] In a specific embodiment, the hinged end of the link rod one and the link rod mounting support is in a "Z" type rod body.

[0011] In a specific embodiment, the link rod one is connected with the ratchet wheel in an insertion mode, the link rod one and the ratchet wheel are connected through the lap joint of the groove and the insertion part, and the link rod one and the ratchet wheel rotate around the hinge; the pawl and the link rod mounting support are hinged through a pin shaft, the pawl is provided with teeth on one side to engage with the ratchet wheel, and the other side is provided with a limiting block, and the limiting block is unidirectionally locked with the ratchet wheel through the contact with the inner wall of the link rod mounting support.

[0012] In a specific embodiment, the ratchet wheel reversing block is hinged with the link rod mounting support through a pin shaft, the ratchet wheel reversing block is provided with protrusions on two sides, the pin shaft is arranged at the lowest point, and one side of the protrusions on the two sides is lapped with the limiting block.

[0013] The automobile folding table board with the link rod structure comprises a table board upper plate assembly and a table board lower plate assembly, the upper plate assembly and the lower plate assembly are fixed through a table board plastic piece mounting support; two groups of link rod structures are arranged in the interior of the upper plate assembly and the lower plate assembly in a horizontal mirror image mode, the link rod mounting support is fixed in the interior of the upper plate assembly and the lower plate assembly through a bolt, and the fixed support is mounted on a seat back skeleton.

[0014] In a specific embodiment, the surface of the table board upper plate assembly is provided with a cup holder groove and a wireless charging module, and a link rod structure movement groove is further formed on the two sides of the table board upper plate assembly.

[0015] In a specific embodiment, the outer side of the link rod mounting support is further provided with a plastic decoration piece.

[0016] According to the above technical solution, compared with the prior art, the automobile folding table board with the link rod structure has the following beneficial effects:

[0017] 1. The structure adopts a simple and effective link rod mechanism, wherein the link rod one and the link rod two are hinged with the fixed support and the link rod mounting support respectively. Through reasonable hinge and ratchet mechanism, an operator can easily unfold and fold the table board, and the complex operation process is avoided.

[0018] The ratchet wheel and the pawl enable the link rod structure to have obvious control and positioning effect during unfolding and folding, and no additional locking device is needed, thereby simplifying the use process.

[0019] 2. The stability of the connecting rod structure is ensured by the design of the ratchet, pawl, torsion spring and hinge point. The engagement of the ratchet and pawl provides precise angular limitation, ensuring that the overall rotation angle of the table board is effectively controlled, preventing the table board from loosening or instability during use.

[0020] 3. The connecting rod structure is suitable for a folding table board of a car, especially near the backrest of the car seat, and is compact and flexible, capable of being installed without occupying too much space. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0022] Figure 1 Structure diagram of the present application;

[0023] Figure 2 Structure diagram of the present application;

[0024] Figure 3 Structure diagram of the present application;

[0025] Figure 4 Structure diagram of the present application;

[0026] Figure 5 Structure diagram of the present application;

[0027] In the figure: 1. Connecting rod structure; 2, connecting rod one; 3, connecting rod two; 4, guide bracket; 5, ratchet; 6, wireless charging module; 7, pawl; 8, pawl reversing block torsion spring; 9, pawl reversing block; 10, pawl torsion spring; 11, connecting rod mounting bracket; 12, table board lower assembly; 13, fixed bracket; 14, table board upper assembly; 15, cup holder; 16, table board mounting bracket; 17, charging area. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] Embodiment 1: Connecting rod structure 1 of automobile folding table board

[0030] The embodiment provides a connecting rod structure of an automobile folding table board, taking a left connecting rod structure as an example, and adopting a fixed support 13, a connecting rod one 2, a connecting rod two 3, a connecting rod mounting support 11, a ratchet wheel 5 and a ratchet pawl 7 and the like. The structure enables the automobile folding table board to be stably folded and unfolded through simple operation.

[0031] The connecting rod structure 1 is composed of the fixed support 13 on the left side of the table board, the connecting rod one 2, the connecting rod two 3 and the connecting rod mounting support 11; one end of the connecting rod one 2 and the connecting rod two 3 is hinged to the fixed support 13, and the other end is hinged to the connecting rod mounting support 11; the connecting rod one 2 is provided with the ratchet wheel 5 at the hinged position with the connecting rod mounting support 11, and the ratchet pawl 7 is hinged to the connecting rod mounting support 11; one end of the ratchet pawl 7 is rotatably engaged with the ratchet wheel 5, and is used for limiting the rotation angle of the connecting rod one 2, and the ratchet pawl 7 is sleeved with the ratchet pawl torsional spring 10; the ratchet pawl reversing block 9 is arranged on the inner side of the hinged position of the connecting rod two 3 and the connecting rod mounting support 11, the ratchet pawl reversing block 9 is hinged to the fixed support 13 on the left side of the table board, and is sleeved with the ratchet pawl reversing block torsional spring 8; the ratchet pawl 7 is overlapped with the ratchet pawl reversing block 9.

[0032] In the force-free state of the connecting rod one 2 and the connecting rod two 3, the fixed support 13 on the left side of the table board is arranged in parallel with the connecting rod mounting support 11; the rod body of the connecting rod two 3 includes a parallel rod part, a connecting rod part and an arc-shaped rod head, a parallel rod part parallel to the fixed support 13 on the left side of the table board is arranged at the hinged end of the connecting rod two 3 and the fixed support 13 on the left side of the table board, an arc-shaped rod head recessed inward to the side of the connecting rod mounting support 11 is arranged at the hinged end of the connecting rod two 3 and the connecting rod mounting support 11, and the parallel rod part and the arc-shaped rod head are connected through the connecting rod part; the hinged end of the connecting rod one 2 and the connecting rod mounting support 11 is in a "Z" type rod body.

[0033] The connecting rod one 2 is connected with the ratchet wheel 5 in an insertion mode, and is overlapped with the insertion part through a groove, and the connecting rod one 2 and the ratchet wheel 5 rotate around the hinged position; the ratchet pawl 7 is hinged to the connecting rod mounting support 11 through a pin shaft, one side of the ratchet pawl 7 is provided with a tooth engaged with the ratchet wheel 5, and the other side is provided with a limiting block, and the limiting block unidirectionally locks the ratchet wheel 5 by being in contact with the inner wall of the connecting rod mounting support 11.

[0034] The ratchet pawl reversing block 9 is hinged to the connecting rod mounting support 11 through a pin shaft, and the ratchet pawl reversing block 9 is provided with protrusions on two sides, and the pin shaft is arranged at the lowest point, and one side of the protrusions is overlapped with the limiting block.

[0035] Working principle

[0036] State one: closed state of the connecting rod structure

[0037] The fixed support 13 on the left side of the table board is parallel to the connecting rod mounting support 11, and the connecting rod one 2 and the connecting rod two 3 naturally droop in the natural state; the pawl reversing block 9 and the pawl 7 are always in contact under the action of the pawl reversing block torsion spring 8 and the pawl torsion spring 10; this state is the closed state of the table board folding table, and the table board folding table is fixed by the plastic part and the seat back, and the closed state is maintained.

[0038] State two: closed state to open state

[0039] This state is a motion state, and the fixed support 13 on the left side of the table board is no longer parallel to the connecting rod mounting support 11 in the motion process, and the angle of the connecting rod mounting support 11 becomes larger and larger until the limit position. In this process, the connecting rod two 3 contacts the pawl reversing block 9, presses the pawl reversing block 9 downward, and rotates against the force of the pawl reversing block torsion spring 8, thereby forcing the pawl reversing block 9 to slowly separate from the pawl 7.

[0040] State three: limit state

[0041] When the angle of the connecting rod mounting support 11 reaches the limit position, that is, the limit angle of the small table board, it approaches the vertical angle; the connecting rod two 3 contacts the pawl reversing block 9, forcing the pawl reversing block 9 to completely separate from the pawl 7; with rotation, the connecting rod one 2 rotates to drive the ratchet 5 to rotate, the pawl 7 contacts the ratchet 5 under the action of the pawl torsion spring 10, the ratchet 5 meshes with the pawl 7, enters one-way locking, and cannot expand the angle of the connecting rod mounting support 11 any more, and the locking of the ratchet 5 and the pawl 7 ensures that the table board does not loosen during use.

[0042] State four: small table board opening to limit position to closing direction motion process

[0043] The small table board has a one-way locking function when it rotates to the closing direction from the opening limit position, that is, it can only be opened downward; in this process, the connecting rod two 3 moves away from the pawl reversing block 9, the pawl reversing block 9 reversely rotates under the action of the pawl reversing block torsion spring 8, and then the pawl reversing block 9 and the pawl 7 return to the contact state. At the same time, the connecting rod one 2 also reversely rotates to drive the ratchet 5 to disengage.

[0044] State five: return to the closed state.

[0045] Example 2: enhanced automobile folding table board with connecting rod structure 1

[0046] The automobile folding table board includes a table board upper plate assembly 14 and a table board lower plate assembly 12, and bolt holes are formed in the table board upper plate assembly 14 and the table board lower plate assembly 12, and the table board upper plate assembly 14 and the table board lower plate assembly 12 are fixed by bolts; the table board lower plate assembly 12 serves as a decorative plate and is exposed to the outside after the table board support 13 is closed, so that the user can view it.

[0047] The upper side of the table top supporting assembly 14 is provided with a concave placing groove, and cylindrical articles such as a water cup can be placed in the placing groove to prevent falling. The inner side of the table top supporting member 13 is provided with a table top mounting bracket 11 and a wireless charging module 6; the table top mounting bracket 11 is made of plastic material, and the upper side of the table top supporting assembly 14 is provided with a charging area which is located on the upper side of the wireless charging module 6. Devices that can be wirelessly charged are placed on the upper side of the charging area, and the devices can be wirelessly charged. The outer side of the table top supporting assembly 14 is provided with an electrical connection port which is electrically connected with the wireless charging module 6, and is used to send external power to the wireless charging module 6.

[0048] The number of the connecting rod structures 1 is two, and the two connecting rod structures 1 are symmetrically and mirror-imaged arranged to ensure stability during folding. The two connecting rod structures 1 are respectively located on the two sides of the table top mounting bracket 11. The inner side of the connecting rod mounting bracket 11 is provided with a guide bracket 4 which is connected with the connecting rod mounting bracket 11 through bolts. The guide bracket 4 supports the connecting rod mounting bracket 11 to prevent the connecting rod mounting bracket 11 from being deformed inwardly. The connecting rod one 2 and the connecting rod two 3 are both penetrated through the guide bracket 4 and then hingedly connected with the connecting rod mounting bracket 11. The guide bracket 4 also has a certain guiding effect to prevent the connecting rod one 2 and the connecting rod two 3 from being inclined to the two sides.

[0049] The distance from the hinging shafts of the pawl reversing block 9 and the pawl 7 to the lower end of the inner wall of the guide bracket 4 is less than the distance from the hinging shafts to the vertexes of the opposite protrusions. The pawl reversing block 9 and the pawl 7 are limited by the lower end of the inner wall of the guide bracket 4 to prevent them from rotating by too large an angle, thereby ensuring that the limiting protrusions on the pawl reversing block 9 and the first connecting rod limiting protrusion can correspond, the opposite protrusions on the pawl reversing block 9 and the opposite protrusions on the pawl 7 can correspond, and the pawl 7 and the ratchet wheel 5 can correspond.

[0050] The connecting rod mounting bracket 11 is arranged in a U shape, and the pawl reversing block 9, the pawl 7 and the ratchet wheel 5 are all located on the inner side of the connecting rod mounting bracket 11. The pawl reversing block 9 and the pawl 7 are connected with the connecting rod mounting bracket 11 through pins, and the pawl reversing block 9 and the pawl 7 penetrate through the inner wall of the connecting rod mounting bracket 11. The ratchet wheel 5 is coaxially connected with the connecting rod one 2, and the outer sides of the two are both provided with pin holes. The ratchet wheel 5 and the connecting rod one 2 are connected together through a pin 4 penetrating through the pin holes, so that the two coaxially and synchronously rotate when rotating. The pawl reversing block torsion spring 8 is sleeved on the outer side of the pawl reversing block 9. The pawl torsion spring 10 has two ends respectively connected on the outer side of the pawl 7 and the inner wall of the connecting rod mounting bracket 11, and is used to drive the pawl 7 to rotate clockwise. The pawl reversing block torsion spring 8 has two ends respectively connected on the outer side of the pawl reversing block 9 and the inner wall of the connecting rod mounting bracket 11, and is used to drive the pawl reversing block 9 to rotate counterclockwise.

[0051] The pawl reversing block 9 and the pawl 7 are provided with abutting protrusions on the outer sides, and when closed, the abutting protrusions of the pawl reversing block 9 and the pawl 7 abut together, at which time the pawl reversing block 9 and the pawl 7 stop rotating towards each other; in order to achieve this purpose, the abutting position of the abutting protrusions of the pawl reversing block 9 and the pawl 7 is regarded as an abutting point, the central axis of the pawl reversing block 9 is regarded as a first shaft, and the central axis of the rotating shaft of the pawl 7 is regarded as a second shaft; the distance between the first shaft and the second shaft is a (a>0), the distance from the abutting point to the first shaft is b (b>0), and the distance between the abutting point and the second shaft is c (c>0), a, b, and c satisfy the three-side relationship of a triangle, that is, the sum of any two sides is greater than the third side, at which time the three form a triangle, thereby stabilizing the pawl reversing block 9 and the pawl 7, and ensuring that the positional relationship of the pawl reversing block 9 and the pawl 7 remains unchanged in the normal state.

[0052] The outer sides of the connecting rod two 3 and the pawl reversing block 9 are provided with limiting protrusions, when the table board support 13 is opened, the connecting rod two 3 rotates counterclockwise, the connecting rod two 3 drives the limiting protrusions on the outer side to rotate, and finally the limiting protrusions on the outer side of the connecting rod two 3 are attached to the limiting protrusions on the outer side of the pawl reversing block 9, at which time the connecting rod two 3 is continuously rotated, the connecting rod two 3 drives the pawl reversing block 9 to rotate clockwise through the limiting protrusions, and finally the abutting protrusions on the outer side of the pawl reversing block 9 and the abutting protrusions on the outer side of the pawl 7 are separated, and then the pawl torsional spring 10 drives the pawl 7 to rotate clockwise.

[0053] The outer side of the ratchet wheel 5 is provided with a local tooth, and only when the ratchet wheel 5 is rotated to a set angle, the local tooth will be limited by the pawl 7, at which time the ratchet wheel 5 can only rotate in one direction. The contact position of the local tooth of the ratchet wheel 5 and the pawl 7 is a contact point, the distance between the rotating shaft of the ratchet wheel 5 and the rotating shaft of the pawl 7 is e (e>0), the distance between the rotating shaft of the ratchet wheel 5 and the contact point is f (f>0), and the distance between the rotating shaft of the pawl 7 and the contact point is g (g>0), e, f, and g also satisfy the three-side relationship of a triangle, that is, the sum of any two sides is greater than the third side, and the triangle formed has stability.

[0054] When unfolding, the rotating link 2, the limiting protrusion on the rotating link 2 and the limiting protrusion on the pawl reversing block 9 will be in contact, then the rotating link 2 and the pawl reversing block 9 start to rotate towards each other; with the rotation of the pawl reversing block 9, the opposite protrusion on the outer side of the pawl reversing block 9 also starts to rotate, when the opposite protrusion on the outer side of the pawl reversing block 9 is separated from the opposite protrusion on the outer side of the pawl 7, the pawl 7 starts to reset and rotate under the torsion of the pawl torsion spring 10, at this time, the partial teeth on the outside of the ratchet wheel 5 are in contact with the pawl 7, since the pawl 7 is not limited at this time, the ratchet wheel 5 can still rotate in both directions; with the continuous rotation of the rotating link 2, the limiting protrusion on the rotating link 2 passes through the limiting protrusion on the pawl reversing block 9, then the limiting protrusion on the rotating link 2 no longer limits the limiting protrusion on the pawl reversing block 9, under the action of the torsion of the pawl reversing block 8 torsion spring, the pawl reversing block 9 resets, at this time, the limiting protrusion on the outer side of the pawl reversing block 9 will not be in contact with the limiting protrusion on the outer side of the rotating link 2, and it will not interfere with the clockwise rotation of the rotating link 2; if positioning is needed, then rotate the rotating link 3 clockwise (a small angle) (when rotating the rotating link 2, the rotating link 3 will rotate synchronously clockwise or counterclockwise with the rotating link 2), the rotating link 3 drives the pawl 7 to rotate counterclockwise through the ratchet wheel 5, then the opposite protrusion on the outer side of the pawl reversing block 9 is in contact with the opposite protrusion on the outer side of the pawl 7 again, the pawl reversing block 9 limits the pawl 7 again, at this time, the ratchet wheel 5 can only rotate in one direction (only counterclockwise); before rotating the rotating link 3 clockwise, there are multiple teeth on the partial teeth of the ratchet wheel 5, each tooth can be regarded as a positioning position, when the ratchet wheel 5 is positioned at different positioning positions, the angle between the table board 14 and the vehicle seat is different, thereby realizing multi-stage adjustment.

[0055] In use, the unfolded table board 14 will place articles, and the gravity of the articles will prevent the table board 14 from closing. When it is needed to close the table board 14, first, the articles on the table board support 13 are put away, then the rotating link 3 is rotated clockwise (a large angle), the rotating link 3 drives the pawl 7 to rotate counterclockwise through the ratchet wheel 5, then the opposite protrusion on the outer side of the pawl 7 is separated from the opposite protrusion on the outer side of the pawl reversing block 9 (this process needs to overcome the work done by the pawl torsion spring 10 and the pawl reversing block torsion spring 8, so a larger force is needed), then the pawl reversing block 9 rotates again, at this time, the limiting protrusion on the outer side of the pawl reversing block 9 will not be in contact with the limiting protrusion on the outer side of the rotating link 2, and it will not interfere with the clockwise rotation of the rotating link 2.

[0056] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0057] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A linkage structure, comprising a fixed bracket, a first linkage, a second linkage, and a linkage mounting bracket; one end of the first linkage and the second linkage are hinged to the fixed bracket, and the other end is hinged to the linkage mounting bracket; characterized in that: The connecting rod one is provided with a ratchet wheel at the hinging position with the connecting rod mounting support, and a pawl is hinged on the connecting rod mounting support; one end of the pawl is in rotational engagement with the ratchet wheel for limiting the rotation angle of the connecting rod one, and a pawl torsion spring is sleeved on the pawl; a ratchet wheel reversing block is arranged inside the hinging position of the connecting rod two with the connecting rod mounting support, the ratchet wheel reversing block is hinged with the fixed support and sleeved with a pawl reversing block torsion spring; the pawl and the ratchet wheel reversing block are overlapped.

2. The link structure according to claim 1, characterized by In the state that the connecting rod one and the connecting rod two are not subjected to force, the fixed support and the connecting rod mounting support are arranged in parallel; the rod body of the connecting rod two includes a parallel rod portion, a connecting rod portion and an arc-shaped rod head, a parallel rod portion parallel to the fixed support is arranged at the hinging end of the connecting rod two with the fixed support, and an arc-shaped rod head recessed inwardly to the side of the connecting rod mounting support is arranged at the hinging end of the connecting rod two with the connecting rod mounting support, and the parallel rod portion and the arc-shaped rod head are connected through the connecting rod portion.

3. The link structure according to claim 2, characterized in that, The hinging end of the connecting rod one with the connecting rod mounting support is in a "Z" type rod body.

4. The link structure according to claim 3, characterized in that, The connecting rod one is connected with the ratchet wheel in an insertion mode, and the connecting rod one and the ratchet wheel are combined to rotate around the hinging position through the overlapping of the groove and the insertion portion; the pawl is hinged with the connecting rod mounting support through a pin shaft, the pawl is provided with teeth on one side for engagement with the ratchet wheel, and a limiting block is arranged on the other side, the limiting block is arranged to lock the ratchet wheel in one direction through contact with the inner wall of the connecting rod mounting support.

5. The linkage structure of claim 4, wherein, The ratchet wheel reversing block is hinged with the connecting rod mounting support through a pin shaft, the ratchet wheel reversing block is provided with protrusions on both sides, and the pin shaft is arranged at the lowest point; one side of the protrusions is overlapped with the limiting block.

6. The folding table board of the automobile having the linkage structure according to any one of claims 1 to 5, characterized in that, The folding table board of the automobile includes a table board upper plate assembly and a table board lower plate assembly, the upper and lower plate assemblies are fixed through a table board plastic piece mounting support; two groups of connecting rod structures are arranged inside the upper and lower plate assemblies in a horizontal mirror image mode, the connecting rod mounting support is fixed in the upper and lower plates through a bolt, and the fixed support is mounted on the seat back skeleton.

7. The automotive folding table board according to claim 6, wherein, A cup holder groove and a wireless charging module are arranged on the surface of the table board upper plate assembly, and a connecting rod structure movement groove is further arranged on both sides of the table board upper plate assembly.

8. The automotive folding table board according to claim 6, wherein, A plastic decoration piece is further arranged on the outside of the connecting rod mounting support.

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