Sitting posture adjusting mechanism for rail transit seat

Abstract

The utility model relates to a sitting posture adjusting mechanism for a rail transit seat. The sitting posture adjusting mechanism comprises a seat main body and a backrest, a first backrest framework and a second backrest framework are fixedly arranged at the bottom of the backrest, and a seat cushion framework is arranged on the seat main body; the first backrest framework is hinged with the seat cushion framework; an elastic positioning device is assembled at the bottom of the seat body, one side of the elastic positioning device is hinged to the second backrest framework, and the other side of the elastic positioning device is hinged to the seat body. The sitting posture adjusting seat is simple in structure, the elastic positioning device is assembled at the bottom of the seat body, one side of the elastic positioning device is hinged to the second backrest framework, and the other side of the elastic positioning device is hinged to the seat body, so that the sitting posture of a passenger can be adjusted conveniently. The angle change of the seat cushion part and the backrest executing mechanism part always coincides with the rotation track of the opening angle of the human body, no dislocation difference exists between the human body and the seat in the angle change process, the backrest of the human body is always attached to the backrest of the seat, and therefore the riding experience of passengers is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of seat accessories, and particularly relates to a sitting posture adjusting mechanism for rail transit seats. Background Art

[0002] Existing seats used in various fields such as railways, urban rails, and aviation mainly consist of a seat turntable, a seat base, a seat cushion, a backrest, a leg rest, a footrest, a control panel, a backrest actuator, a leg rest actuator, and a footrest actuator, etc.; among them, the backrest actuator part of the seat not only needs to be designed based on ergonomics but also needs to realize the adjustment of the passenger's sitting posture, allowing the passenger to independently select a more suitable sitting posture on the basis of conforming to the human body structure, thereby bringing a more comfortable riding experience to the passenger.

[0003] Moreover, most of the existing research on the sitting posture adjusting mechanism of rail transit seats stays at the angle change of a single mechanism, that is, only considering the angle change brought by the backrest actuator, believing that the process of the passenger adjusting the sitting posture is only realized by the backrest actuator, thus ignoring that the angle change of the seat base can also play an important role, and further leading to the problem of misalignment between the human body and the seat surface during the sitting posture adjustment process, thereby reducing the passenger's riding experience.

[0004] In view of the above problems, it is necessary to improve it. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rail transit seat sitting posture adjusting mechanism with a simple structure and ingenious design, which can reasonably solve the problem of misalignment between the human body and the seat surface during the sitting posture adjustment process, thereby further improving the passenger's riding experience.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a rail transit seat sitting posture adjusting mechanism, including a seat main body and a backrest; a first backrest skeleton and a second backrest skeleton are fixedly arranged at the bottom of the backrest, and a seat cushion skeleton is arranged on the seat main body; the first backrest skeleton is hinged to the seat cushion skeleton; an elastic positioning device is assembled at the bottom of the seat main body, one side of the elastic positioning device is hinged to the second backrest skeleton, and the other side is hinged to the seat main body.

[0007] As a preferred scheme of the utility model, the seat cushion skeleton is in a triangular structure, a positioning shaft is formed at the top, and the end of the first backrest skeleton rotates around the positioning shaft.

[0008] As a preferred scheme of the utility model, the elastic positioning device includes a gas spring, a button for controlling the gas spring switch, and a steel cable connecting the gas spring and the button; one side of the gas spring is hinged to the backrest skeleton, and the other side is hinged to the seat main body.

[0009] As a preferred embodiment of the present utility model, the button is assembled at the bottom of the front end of the armrest.

[0010] As a preferred embodiment of the present utility model, a plurality of backrest connection points are arranged at the bottom of the second backrest frame. The plurality of backrest connection points are connected to a first bracket, the first bracket is connected to a slider, and the slider moves along a chute, and the chute is fixed on the seat body.

[0011] As a preferred embodiment of the present utility model, the slider is connected to a second bracket, and the second bracket is connected to the seat cushion. Among them, the seat cushion is arranged on the seat cushion frame and is fixedly connected to the slider.

[0012] As a preferred embodiment of the present utility model, there are 3 backrest connection points. Among them, the middle backrest connection point is connected to the gas spring, and the backrest connection points on both sides are connected to the first bracket.

[0013] As a preferred embodiment of the present utility model, the second bracket and the gas spring are connected by a rotating shaft, and a plurality of fixed support members are arranged between the rotating shafts.

[0014] As a preferred embodiment of the present utility model, a hollow box is arranged on the outer side of the fixed support member; the hollow box is placed at the armrest.

[0015] As a preferred embodiment of the present utility model, a cover plate is installed on the outer side of the hollow box.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The structure of the present utility model is simple. By assembling an elastic positioning device at the bottom of the seat body, one side of the elastic positioning device is hinged to the second backrest frame, and the other side is hinged to the seat body, which can ensure that during the sitting posture adjustment process of the passenger, the angle change between the seat cushion part and the backrest actuator part of the seat always coincides with the rotation trajectory of the opening angle of the human body, there is no misalignment difference between the human body and the seat during the angle change, and the human backrest always fits with the seat backrest, thereby greatly improving the riding experience of the passenger. Description of the Drawings

[0018] Figure 1 It is a top view of the adjustment mechanism of the present utility model;

[0019] Figure 2 It is a partial side view of the adjustment mechanism of the present utility model;

[0020] Figure 3 It is a structural diagram of the backrest of the present utility model;

[0021] Figure 4 It is an initial state diagram of the adjustment mechanism of the present utility model;

[0022] Figure 5 Schematic diagram of the backrest of the adjustment mechanism of the present utility model in the unfolded state;

[0023] Figure 6 Use state diagram of the seat of the present utility model;

[0024] Figure 7 For the present utility model Figure 4 A - A cross - sectional view;

[0025] Explanation of reference numerals: Second bracket 1, slider 2, chute 3, first bracket 4, backrest connection point 5, elastic positioning device 6, backrest 7, seat cushion 8, fixed support member 9, cover plate 10, seat body 11, seat cushion skeleton 12, hollow box 13, armrest 14, gas spring 60, button 61, steel cable 62, first backrest skeleton 70, second backrest skeleton 71. Detailed implementation manners

[0026] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment

[0028] As Figure 1 、 Figure 2 and Figure 3 shown, among which, Figure 1 Top view of the adjustment mechanism of the present utility model; Figure 2 Partial side view of the adjustment mechanism of the present utility model; Figure 3 Structural diagram of the backrest of the present utility model.

[0029] The present utility model provides a sitting posture adjustment mechanism for rail transit seats, which can ensure that during the sitting posture adjustment process, the angular change between the seat cushion part and the backrest actuator part of the seat always coincides with the rotation trajectory of the opening angle of the human body. There is no misalignment difference between the human body and the seat during the angular change process, and the human backrest always fits with the seat backrest, thus greatly improving the riding experience of passengers, which is of great significance for the subsequent research in the field of rail transit seat technology.

[0030] Specifically, a sitting posture adjustment mechanism for rail transit seats includes a seat main body 11 and a backrest 7; a first backrest skeleton 70 and a second backrest skeleton 71 are fixedly arranged at the bottom of the backrest 7, and a seat cushion skeleton 12 is arranged on the seat main body 11; the first backrest skeleton 70 is hinged to the seat cushion skeleton 12; an elastic positioning device 6 is assembled at the bottom of the seat main body 11, one side of the elastic positioning device 6 is hinged to the second backrest skeleton 71, and the other side is hinged to the seat main body 11, and a button 61 is assembled at the front bottom of the armrest 14; it is convenient to operate and use.

[0031] Among them, the elastic positioning device 6 includes a gas spring 60, a button 61 for controlling the switch of the gas spring 60, and a steel cable 62 connecting the gas spring 60 and the button 61; one side of the gas spring 60 is hinged to the backrest skeleton 70, and the other side is hinged to the seat main body 11.

[0032] Continue to refer to Figure 2 A partial side view of the shown adjustment mechanism; it can be seen that by driving the steel cable 62 to move through the button 61, the gas spring 60 can be unlocked. At this time, the passenger can directly adjust the angle of the backrest by leaning back the backrest. During the angular change of the backrest, the seat cushion can rotate around point H by means of the connecting piece at the bottom of the backrest, so as to realize the adjustment of the sitting posture. If the gas spring 60 is unlocked by loosening, the posture of the seat can be locked.

[0033] Continue to refer to Figures 4 - 6 ; Figure 4 is the initial state diagram of the adjustment mechanism of the present utility model; Figure 5 is the schematic diagram of the backrest in the unfolded state of the adjustment mechanism of the present utility model; Figure 6 is the usage state diagram of the seat of the present utility model; the working process of the sitting posture adjustment mechanism of this seat during actual use is as follows: when the human body leans back, pull the button 61, then the switch of the gas spring 60 is opened, and the human back applies a little force backward, and the reclining angle of the backrest 7 can be adjusted. When the human body feels adjusted to the most comfortable position, release the button 61, and the switch of the gas spring 60 is closed, then the angle of the backrest 7 is locked, so that the backrest 7 stays in the most comfortable position; when the human body leans forward, pull the button 61, the human back leans forward a little, and the backrest 7 leans forward with the human back. When the backrest 7 is adjusted to the most comfortable position, release the button 61, and it can stay in this position.

[0034] The seat cushion frame 12 is in a triangular structure, and a positioning shaft H is formed at the top. The end of the first backrest frame 70 rotates around the positioning shaft H, that is, at the position of the rotation point H. Among them, the rotation point of the first backrest frame 70 and the seat cushion frame 12 is located at the position of the positioning shaft H. The positioning shaft H is arranged on the armrest frame and is close to the H point of the human body. The angle change of the backrest and the angle change of the seat cushion both revolve around the H point, which coincides with the rotation point of the opening angle of the human body. During the angle change process, there is no misalignment difference between the human body and the seat, and the human backrest always fits with the seat backrest.

[0035] A plurality of backrest connection points 5 are arranged at the bottom of the second backrest frame 71. The plurality of backrest connection points 5 are connected to a first bracket 4. The first bracket 4 is connected to a slider 2. The slider 2 moves along a chute 3. The chute 3 is fixedly arranged on the seat body 11; the slider 2 is connected to a second bracket 1. The second bracket 1 is connected to the seat cushion 8. Among them, the seat cushion 8 is arranged on the seat cushion frame 12 and is fixedly connected to the slider 2; the second backrest frame 71 pushes the first bracket 4, and then the first bracket 4 pushes the slider 2. The slider 2 further pushes the second bracket 1. Finally, the second bracket 1 pushes the seat cushion 8 to change the angle. Through this step, the angle synchronization change of the backrest and the seat cushion can be realized.

[0036] There are 3 backrest connection points 5. Among them, the middle backrest connection point 5 is connected to a gas spring 60, and the backrest connection points 5 on both sides are connected to the first bracket 4.

[0037] Refer to Figure 7 The following shows the A-A sectional view of the present utility model Figure 4 ; The structure inside the hollow box 13 can be clearly seen. The significance of this is to prevent accidental touch during the passenger's ride, that is, the connecting parts connecting the seat cushion, the backrest and the rotating shaft cannot be directly exposed. Therefore, a hollow box 13 is set to accommodate them, and the hollow box 13 is placed at the armrest 14. In this structure, the first bracket 4, the second bracket 1, the slider 2 and the fixed support 9 are all fixed at the H point in the form of bolt connection. Then a cover plate 10 is installed on its surface, and then the seat cushion is placed to prevent the structure from being exposed.

[0038] The second bracket 1 and the gas spring 60 are connected by a rotating shaft. In order to prevent potential safety hazards caused by insufficient cantilever stiffness of the rotating shaft, a plurality of fixed supports 9 are arranged between the rotating shafts.

[0039] A hollow box 13 is arranged outside the fixed support 9; in order to prevent accidental touch during the passenger's ride, the connecting parts connecting the seat cushion, the backrest and the rotating shaft cannot be directly exposed. Therefore, a hollow box 13 is set to accommodate them, and the hollow box 13 is placed at the armrest 14; a cover plate 10 is installed outside the hollow box 13.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. 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 utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although the terms such as the second bracket 1, slider 2, chute 3, first bracket 4, backrest connection point 5, elastic positioning device 6, backrest 7, seat cushion 8, fixed support 9, cover plate 10, seat body 11, seat cushion frame 12, hollow box 13, armrest 14, gas spring 60, button 61, cable 62, first backrest frame 70, second backrest frame 71 and the like are used more frequently in the drawings herein, the possibility of using other terms is not excluded. These terms are used only for more convenient description and explanation of the essence of the present utility model; any interpretation of them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A sitting posture adjustment mechanism for a rail transit seat, characterized in that: It includes a seat body (11) and a backrest (7); a first backrest frame (70) and a second backrest frame (71) are fixedly provided at the bottom of the backrest (7), and a seat cushion frame (12) is arranged on the seat body (11); the first backrest frame (70) is hinged to the seat cushion frame (12); an elastic positioning device (6) is assembled at the bottom of the seat body (11), one side of the elastic positioning device (6) is hinged to the second backrest frame (71), and the other side is hinged to the seat body (11).

2. The sitting posture adjusting mechanism of a rail transit seat according to claim 1, characterized in that: The seat cushion frame (12) is in a triangular structure, and a positioning shaft (H) is formed at the top, and the end of the first backrest frame (70) rotates around the positioning shaft (H).

3. The sitting posture adjusting mechanism for a rail transit seat according to claim 1, wherein: The elastic positioning device (6) includes a gas spring (60), a button (61) for controlling the switch of the gas spring (60), and a steel cable (62) connecting the gas spring (60) and the button (61); one side of the gas spring (60) is hinged to the backrest frame (70), and the other side is hinged to the seat body (11).

4. The sitting posture adjusting mechanism of a rail transit seat according to claim 3, characterized in that: The button (61) is assembled at the bottom of the front end of the armrest (14).

5. A sitting posture adjustment mechanism for a rail transit seat according to claim 1, characterized in that: A plurality of backrest connection points (5) are arranged at the bottom of the second backrest frame (71), the plurality of backrest connection points (5) are connected to a first bracket (4), the first bracket (4) is connected to a slider (2), and the slider (2) moves along a chute (3), and the chute (3) is fixedly arranged on the seat body (11).

6. The sitting posture adjusting mechanism of a rail transit seat according to claim 5, characterized in that: The slider (2) is connected to a second bracket (1), and the second bracket (1) is connected to the seat cushion (8), wherein the seat cushion (8) is arranged on the seat cushion frame (12) and is fixedly connected to the slider (2).

7. The sitting posture adjusting mechanism for a rail transit seat according to claim 5, characterized in that: There are 3 backrest connection points (5), wherein the middle backrest connection point (5) is connected to the gas spring (60), and the backrest connection points (5) on both sides are connected to the first bracket (4).

8. The sitting posture adjusting mechanism of a rail transit seat according to claim 6, wherein: The second bracket (1) and the gas spring (60) are connected by a rotating shaft, and a plurality of fixed supports (9) are arranged between the rotating shafts.

9. The sitting posture adjusting mechanism of a rail transit seat according to claim 8, characterized in that: A hollow box (13) is arranged on the outer side of the fixed support (9); the hollow box (13) is placed at the armrest (14).

10. The sitting posture adjustment mechanism of a rail transit seat according to claim 9, wherein: A cover plate (10) is installed on the outer side of the hollow box (13).

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