Folding table plate for rail transit seat

Abstract

A folding table plate for a rail transit seat comprises the seat and a seat back rotationally connected to the seat, the seat back is provided with a table plate, the seat is provided with a supporting assembly used for supporting the table plate, and a damping part used for buffering lifting of the table plate is connected between the supporting assembly and the seat; when the table plate is not unfolded, the supporting assembly and the table plate synchronously rotate along with the chair back; when the table plate is unfolded, the chair back, the supporting assembly and the table plate do not influence each other; compared with the prior art, the table board is supported through the supporting assembly rotationally connected to the seat, meanwhile, the table board cannot rotate along with the chair back when unfolded, the stability of the table board is improved, in addition, the damping piece is connected between the supporting assembly and the seat, under the action of the damping piece, the table board folded and unfolded downwards is buffered, and the stability of the table board is improved. When the table board is retracted, assistance is provided through the damping piece, and then the table board is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of train seats, and particularly relates to a folding table board for rail transit seats. Background Art

[0002] With the rapid rise of China's economy, high-speed rail has become an indispensable means of travel in modern fast-paced life. However, with the improvement of living conditions, the traditional way can no longer meet people's needs. People are increasingly pursuing a convenient and comfortable lifestyle and longing for a rich and diverse spiritual world. Therefore, the problem of how to improve the comfort of passengers during travel has become particularly important.

[0003] China's high-speed rail has been continuously increasing its speed and expanding its operating mileage, making China a world leader in high-speed rail speed and operating mileage. However, while high-speed rail technology has been developing rapidly, the update of internal facilities in high-speed rail has been neglected. The traditional folding table board of the seat can only achieve the single function of carrying objects, ignoring the experience of the details of the small table board. When a passenger needs to open the small table board during actual use, only relying on the gravity of the small table board itself to achieve the descending stroke of the small table board, resulting in too fast a descent when unfolding, which may easily hit the passenger. Such a design defect poses a relatively large safety hazard for passengers with children; at the same time, when the small table board needs to be retracted, it also completely depends on the passenger to complete manually, which is time-consuming and laborious and affects the passenger's riding experience.

[0004] To solve the above problems, Chinese Patent No. 201920562494.0 discloses a folding table board for high-speed rail. The disclosed folding table board includes a seat, an empty slot is provided on one side wall of the seat, a fixed rod is fixedly connected between the two inner side walls of the empty slot, and the fixed rod is rotationally connected with a table board through an elastic driving device. Chinese Patent No. 201920011680.5 discloses a folding table for a seat and a train seat having the folding table. The disclosed folding table for a seat includes a table board and two mounting brackets mounted on both side surfaces of the table board. The top ends of the mounting brackets are hinged to the table board through a hinge structure, the bottom ends of the mounting brackets are hinged to the seat through a rotating shaft, the bottom ends of the mounting brackets extend towards the seat direction to form a supporting part for abutting against the back of the seat, a threaded hole is provided in the supporting part, and an adjusting screw is threadedly connected to the threaded hole; when the folding table is opened, the head of the adjusting screw abuts against the back of the seat.

[0005] In the above - disclosed prior art, by providing an empty slot on the seat, a fixed rod is connected in the empty slot, and an elastic driving device connected to the table board is provided on the fixed rod to achieve buffering and boosting for the lifting of the table board. Although the above - mentioned solution can provide buffering and boosting for the lifting of the table board, when the seat rotates, since the table board is connected to the seat, the table board will move along with the seat, and then the objects placed on the table board will fall, affecting the stability of the table board. Utility Model Content

[0006] The present utility model aims to overcome the above - mentioned defects in the prior art and provides a folding table board for rail transit seats that can provide buffering and boosting for the lifting of the table board and does not move along with the seat.

[0007] To achieve the above - mentioned utility model purpose, the present utility model adopts the following technical solutions: A folding table board for rail transit seats, including a seat and a chair back rotatably connected to the seat. A table board is provided on the chair back. A support assembly for supporting the table board is provided on the seat, and a damping member for buffering the lifting of the table board is connected between the support assembly and the seat; when the table board is not unfolded, the support assembly and the table board rotate synchronously with the chair back; when the table board is unfolded, the chair back, the support assembly and the table board do not affect each other.

[0008] As a preferred solution of the present utility model, an arc - shaped sliding groove for slidably connecting with the support member is formed on the seat.

[0009] As a preferred solution of the present utility model, the support assembly includes a first support arm and a second support arm fixedly connected, and the table board is rotatably connected to the second support arm.

[0010] As a preferred solution of the present utility model, a rotating shaft is provided on the first support arm, and a pulley is connected to the rotating shaft. The pulley is slidably connected in the sliding groove.

[0011] As a preferred solution of the present utility model, a connection hole for connecting with the seat is formed on the first support arm, and a positioning shaft for connecting with the seat is provided in the connection hole.

[0012] As a preferred solution of the present utility model, the rotating shaft and the connection hole are arranged at opposite ends of the first support arm, and the rotating shaft is arranged close to the second support arm.

[0013] As a preferred solution of the present utility model, the first support arm is a continuously bent structure, and both the rotating shaft and the connection hole are located at the bent part of the first support arm.

[0014] As a preferred solution of the present utility model, the support assembly rotates around the positioning shaft.

[0015] As a preferred embodiment of the present utility model, both ends of the damping member are respectively hinged to the seat and the first support arm.

[0016] As a preferred embodiment of the present utility model, the second support arm is provided with a first cross beam and a second cross beam for increasing the structural strength of the second support arm.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. The table board is supported by the support assembly rotatably connected to the seat. At the same time, when the table board is unfolded, it will not rotate with the backrest, improving the stability of the table board. In addition, a damping member is connected between the support assembly and the seat. Under the action of the damping member, a buffer is provided for the table board that is folded down and unfolded. When the table board is retracted, the damping member provides assistance, thus facilitating the use of the table board.

[0019] 2. Further, a sliding groove connected to the support assembly is provided on the seat, and a pulley connected to the sliding groove is provided on the support assembly. When the table board is unfolded downward, the pulley slides downward in the sliding groove. At this time, the damping member is in a stretched state, so as to provide resistance to the unfolding of the table board, thus realizing the buffering of the unfolding of the table board. When the table board is retracted, the pulley slides upward. At this time, the damping member contracts, and then the assistance for the recycling of the table board is realized, facilitating the unfolding and recycling of the table board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the support assembly of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the support assembly being unfolded;

[0023] Figure 4 is a schematic structural diagram of the support assembly being retracted;

[0024] Figure 5 is a schematic structural diagram of the backrest flipping when the support assembly is unfolded;

[0025] Figure 6 is a schematic structural diagram of the backrest being in the initial state when the support assembly is unfolded

[0026] Reference numerals: support assembly 1, first support arm 101, rotating shaft 1011, pulley 1012, connection hole 1013, second support arm 102, first cross beam 1021, second cross beam 1022, seat 2, sliding groove 201, positioning shaft 202, backrest 203, table board 3, damping member 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will describe the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0028] As Figures 1-6 shown, a folding table board for a rail transit seat includes a seat 2 and a chair back 203 rotatably connected to the seat 2. A table board 3 is provided on the chair back 203. A support assembly 1 for supporting the table board 3 is provided on the seat 2. A damping member 4 for buffering the lifting of the table board 3 is connected between the support assembly 1 and the seat 2; when the table board 3 is not unfolded, the support assembly 1 and the table board 3 rotate synchronously with the chair back 203; when the table board 3 is unfolded, the chair back 203, the support assembly 1 and the table board 3 do not affect each other.

[0029] Furthermore, the chair back 203 is rotatably arranged on the seat 2. The table board 3 is fixed to the back of the chair back 203 through a knob on the chair back 203. The table board 3 is rotatably connected to the end of the support assembly 1. The table board 3 is supported by the support assembly 1. A damping member 4 is connected to the other end of the support assembly 1. The damping member 4 is connected to the seat 2. The damping member 4 adopts a damping gas spring. When the table board 3 is fixed to the chair back 203, the damping member 4 is in a stable state. When the table board 3 is unfolded, the damping member 4 is in a stretched state, providing resistance to the unfolding of the table board 3, thereby realizing the buffering of the unfolding of the table board 3. When the table board 3 is retracted, at this time the damping member 4 contracts, thereby realizing the assistance for the recycling of the table board 3.

[0030] A sliding groove 201 slidably connected to the support assembly 1 is formed on the seat 2. The sliding groove 201 is an arc-shaped structure. Furthermore, when the table board 3 is unfolded, the support assembly 1 rotates on the seat 2 and also slides in the sliding groove 201. Under the action of the sliding groove 201, the support and limitation of the support assembly 1 are realized.

[0031] The support assembly 1 includes a first support arm 101 and a second support arm 102 fixedly connected. The table board 3 is rotatably connected to the second support arm 102. Furthermore, the table board 3 is connected to the end of the second support arm 102. The other end of the second support arm 102 is connected to the end of the first support arm 101. The first support arm 101 and the second support arm 102 rotate synchronously.

[0032] A rotating shaft 1011 is provided on the first support arm 101. A pulley 1012 is connected to the rotating shaft 1011. The pulley 1012 is slidably connected in the sliding groove 201. Furthermore, the rotating shaft 1011 is perpendicular to the first support arm 101. The pulley 1012 slides in the sliding groove 201. Under the action of the sliding groove 201, the support and limitation of the first support arm 101 are realized.

[0033] A connecting hole 1013 for connecting with the seat 2 is formed on the first support arm 101. A positioning shaft 202 for connecting with the seat 2 is provided in the connecting hole 1013. Further, the positioning shaft 202 is rotatably connected to the first support arm 101 through the connecting hole 1013. Specifically, the rotating shaft 1011 and the connecting hole 1013 are arranged at opposite ends of the first support arm 101, and the rotating shaft 1011 is arranged close to the second support arm 102. In addition, the first support arm 101 is a continuous bending structure. Specifically, three bending points are formed on the first support arm 101, and two of the bending points are on the same side. The rotating shaft 1011 and the connecting hole 1013 are both located at the bending points of the first support arm 101. The rotating shaft 1011 is located at the bending point close to the second support arm 102, and the connecting hole 1013 is located at the bending point close to the damping member 4. The first support arm 101 rotates around the positioning shaft 202, so that the support assembly 1 rotates around the positioning shaft 202.

[0034] Both ends of the damping member 4 are hinged to the seat 2 and the first support arm 101 respectively, so as to ensure that when the first support arm 101 rotates, the damping member 4 can be normally stretched and contracted, thereby providing buffering and assistance for the lifting of the table board 3.

[0035] A first cross beam 1021 and a second cross beam 1022 for increasing the structural strength of the second support arm 102 are provided on the second support arm 102. The first cross beam 1021 and the second cross beam 1022 are located at opposite ends of the second support arm 102, and the structural strength of the second support arm 102 is increased by the first cross beam 1021 and the second cross beam 1022.

[0036] The working principle and process are as follows:

[0037] When the table board 3 is in the retracted state, the table board 3 is fixed to the backrest 203 by a knob on the backrest 203. At this time, the damping member 4 is in a stable state and does not exert a force on the support assembly 1. When the angle of the backrest 203 changes, the backrest 203 rotates clockwise, applying a pressure to the support assembly 1, causing the pulley 1012 to slide downward along the chute 201 on the seat 2, driving the support assembly 1 to rotate clockwise. After the angle of the backrest 203 is limited, the table board 3 is immediately limited, realizing the synchronous movement of the table board 3 and the backrest 203 when the table board 3 is in the retracted state. At this time, the damping member 4 is in a stretched state, but it has no influence on the stability of the seat 2;

[0038] When the backrest 203 is in the initial state and the table board 3 is being unfolded, rotate the fixing knob on the backrest 203. Under the action of gravity and human force, the table board 3 and the support assembly 1 are gradually unfolded. At this time, the damping member 4 is in a stretched state, so that the unfolding process of the table board 3 is resisted, improving the damping feeling. When the table board 3 is parallel to the horizontal plane, it is limited by the support assembly 1 and is in a stable state. The support assembly 1 is limited because the pulley 1012 moves to the bottom of the chute 201. At this time, the table board 3 is fully unfolded, and the damping member 4 is in an energy storage state. Because when it is fully unfolded, the pulley 1012 is located at the bottom of the chute 201, and when the backrest 203 is at the angle limit, the pulley 1012 is also located at the bottom of the chute 201. Therefore, when the table board 3 is fully unfolded, changing the angle of the backrest 203 will not affect the table board 3. When the table board 3 is retracted, the elastic potential energy of the damping member 4 is released, and the table board 3 can be restored without too much external force. Such a design not only realizes the buffering and boosting of the table board of the high-speed rail seat, but also has high safety because this mechanism is hidden on the side of the seat back, meeting the safety requirements of passengers with children.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0040] Although the terms such as support assembly 1, first support arm 101, rotating shaft 1011, pulley 1012, connection hole 1013, second support arm 102, first cross beam 1021, second cross beam 1022, seat 2, chute 201, positioning shaft 202, backrest 203, table board 3, damping member 4 and the like are used more in the drawings herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A folding table for a rail transit seat, comprising a seat (2) and a seat back (203) rotatably connected to the seat (2), wherein the seat back (203) is connected to a table top (3), characterized in that: The seat (2) is provided with a support assembly (1) which is rotatably connected to the seat (2) and is used to support a table top (3); a damping member (4) is connected between the support assembly (1) and the seat (2) and is used to provide buffering and assistance for the lifting and lowering of the table top (3); when the table top (3) is not unfolded, the support assembly (1) and the table top (3) rotate synchronously with the chair back (203); when the table top (3) is unfolded, the chair back (203), the support assembly (1) and the table top (3) do not affect each other.

2. A folding table for rail transit seats according to claim 1, characterized in that: The seat (2) is provided with a slide groove (201) which is slidably connected to the support assembly (1), and the slide groove (201) is an arc-shaped structure.

3. A folding table for rail transit seats according to claim 2, characterized in that: The support assembly (1) comprises a first support arm (101) and a second support arm (102) which are fixedly connected, and the table top (3) is rotatably connected to the second support arm (102).

4. A folding table for rail transit seats according to claim 3, characterized in that: The first support arm (101) is provided with a rotating shaft (1011), the rotating shaft (1011) is connected with a pulley (1012), and the pulley (1012) is slidably connected in the sliding groove (201).

5. A folding table for rail transit seats according to claim 4, characterized in that: A connection hole (1013) connected to the seat (2) is formed on the first support arm (101), and a positioning shaft (202) connected to the seat (2) is provided in the connection hole (1013).

6. A folding table for rail transit seats according to claim 5, characterized in that: The rotating shaft (1011) and the connecting hole (1013) are arranged at two opposite ends of the first supporting arm (101), and the rotating shaft (1011) is arranged close to the second supporting arm (102).

7. The folding table for rail transit seats according to claim 5, characterized in that: The first support arm (101) is a continuously bent structure, and the rotation axis (1011) and the connection hole (1013) are both located at the bending position of the first support arm (101).

8. The folding table for rail transit seats according to claim 5, characterized in that: The support assembly (1) rotates around the positioning axis (202).

9. The folding table for rail transit seats according to claim 3, characterized in that: The two ends of the damping member (4) are respectively hinged to the seat (2) and the first support arm (101).

10. The folding table for rail transit seats according to claim 3, characterized in that: The second support arm (102) is provided with a first crossbeam (1021) and a second crossbeam (1022) for increasing the structural strength of the second support arm (102).

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