Seat backrest structure capable of preventing hands from being pinched

Abstract

The utility model discloses an anti-pinch seat backrest structure, which comprises a seat bottom plate and a seat backrest, the two sides of the seat backrest are respectively and rotatably connected with the two sides of the rear end of the seat bottom plate, and the anti-pinch seat backrest structure is characterized in that the two sides of the rear end of the seat bottom plate are respectively provided with a mounting part extending upwards; connecting parts extending downwards are arranged on the two sides of the bottom of the seat backrest respectively, a mounting groove is formed in the inner side of each mounting part, and each connecting part is rotationally mounted in the mounting groove of the corresponding mounting part; a limiting groove is further formed in the bottom of the mounting groove, and a limiting part arranged in the limiting groove is arranged at the bottom of the connecting part; when the seat backrest is in an unfolded state, the front end face of the limiting part abuts against the inner wall of the front end of the limiting groove. When the seat backrest is folded and stored, the limiting part is far away from the inner wall of the front end of the limiting groove. According to the utility model, the use safety is improved, and the potential safety hazard is reduced.

Description

Technical Field

[0001] The utility model relates to a walking vehicle, in particular to a seat back structure for preventing hands from being pinched. Background Art

[0002] A mobility scooter is also called a lazy bike. It refers to a means of transportation and auxiliary tools for the purpose of walking. In China, it can sometimes refer to cars, electric bicycles, electric scooters, two-wheeled automatic balancing scooters, and unicycles. Among them, in some specific occasions (scenic spots, factory areas, etc.), or for some groups (elderly people), some low-speed scooters are specially designed. When the user uses it, the user sits on the seat, then holds the handlebars with his hands and presses the control switch on the handlebars to achieve low-speed forward and backward movement of the vehicle.

[0003] In order to improve the comfort of the user, a backrest is provided behind the seat so that the user can lean his back against the backrest when using the seat, thereby improving the comfort and safety of the user. Furthermore, in order to reduce the space occupied during transportation or other situations, some backrests will adopt a foldable structure. The conventional folding method is to respectively set convex parts at the two ends of the rear side of the backrest, and the two sides of the bottom of the backrest are respectively connected to the convex parts. After rotating into place, baffles will be set on both sides of the bottom of the backrest, and the baffles will be against the top surface of the convex part to play a limiting role. However, there is a relatively large problem in this structure: the baffle is generally set at the rear side of the bottom of the backrest, or the outer side of the bottom, and directly leaks out, that is, the connection between the baffle and the convex part is directly leaked out, that is, the position that the user can directly touch with his hand, or the position for convenient contact, especially sometimes where children are easy to put their hands. Sometimes the user's hand will be placed in this place, and then when the back is not against the backrest, the backrest may flip forward partly, and the hand may be placed between the baffle and the convex part. When the user leans on it, the baffle and the convex part will clamp the hand, which has a certain risk of clamping the hand and other safety hazards, and will also affect the user's experience. Summary of the invention

[0004] The utility model aims to provide a seat back structure for preventing hand pinching, by using the structure, the safety of use can be improved, and the user experience can also be improved.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a hand-pinch-proof seat back structure, comprising a seat bottom plate and a seat back plate, wherein two sides of the seat back plate are rotatably connected to two sides of the rear end of the seat bottom plate,

[0006] The rear end of the seat bottom plate is provided with mounting components extending upwards, and the bottom of the seat back is provided with connecting components extending downwards, and the inner side of the mounting components is provided with a mounting groove, and each connecting component is rotatably installed in the mounting groove of the corresponding mounting component;

[0007] The bottom of the installation groove is also provided with a limiting groove, and the bottom of the connecting component is provided with a limiting portion arranged in the limiting groove;

[0008] When the seat back is in an unfolded state, the top of the seat back is arranged away from the top plane of the seat bottom plate, and the front end surface of the limiting portion abuts against the front end inner wall of the limiting groove;

[0009] When the seat back is in the folded and stored state, the top of the seat back is arranged close to the top plane of the seat bottom plate, and the limiting portion is arranged away from the front end inner wall of the limiting groove.

[0010] In the above technical solution, the top and front end of the mounting groove are respectively connected to the top surface and front end surface of the mounting component;

[0011] And / or, the front end of the inner side of the installation groove is connected to the inner side surface of the installation component.

[0012] In the above technical solution, a support positioning platform is provided at the front side of the bottom of the installation groove, and the rear end surface of the support positioning platform and the inner surface of the bottom of the installation groove form the limiting groove;

[0013] And / or, when the seat back is in the unfolded state, the front end surface of the limiting portion abuts against the rear side surface of the supporting positioning platform.

[0014] In the above technical solution, the bottom surface of the supporting positioning platform is provided with an arc-shaped supporting surface, the connecting component is rotatably connected to the mounting component via a connecting member, and the connecting member is coaxially arranged with the arc-shaped supporting surface;

[0015] The outer surface of the connecting component on the front side of the limiting portion matches the arc-shaped supporting surface;

[0016] And / or, part of the outer surface of the connecting component on the front side of the limiting portion abuts against the arc-shaped supporting surface.

[0017] In the above technical solution, a folding groove is provided on the inner side of the top of the mounting component, the folding groove is arranged close to the rear side of the mounting component, the rear side surface of the folding groove is arranged flush with the rear side surface of the mounting groove, and the other side of the folding groove is connected to the mounting groove;

[0018] A stopper is provided on the inner side surface of the connecting component and faces the folding groove. When the seat back is in an unfolded state, the bottom of the stopper abuts against the bottom surface of the folding groove.

[0019] In the above technical solution, a folding groove is provided on the inner side of the top of the mounting component, and a stopper facing the folding groove is provided on the inner side of the connecting component. When the seat back is unfolded, the bottom of the stopper abuts against the bottom surface of the folding groove.

[0020] In the above technical solution, the folding groove is connected to or not connected to the installation groove.

[0021] In the above technical solution, when the seat back is in the folded and stored state, the blocking member is separated from the folding groove and is arranged away from the folding groove.

[0022] In the above technical solution, the inner side surface of the stopper is connected to the bottom surface of the seat back via a connecting arc surface.

[0023] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0024] 1. In the present invention, a limiting groove is provided in the installation groove, and a limiting part is provided at the bottom of the connecting part of the seat back. In this way, when the seat is unfolded, the seat back is limited by the limiting groove and the limiting part. In this way, compared with the previous structure in which the limiting groove and the limiting part are provided at the rear side and the outer side of the seat back, the limiting groove and the limiting part are respectively provided at the bottom of the installation groove and the bottom of the seat back, both of which are positions where hands are not put in, which can effectively prevent the occurrence of hand pinching, effectively reduce safety hazards, and improve user experience;

[0025] 2. In the utility model, a folding groove is further provided on the inner side of the top of the mounting component, and a stopper is provided on the inner side of the connecting component. On the basis of the limiting portion and the limiting groove, the seat back is further limited by the folding groove and the stopper to ensure the limiting stability and quality of the seat back. At the same time, the folding groove and the stopper are both located at the bottom of the backrest and on the inner side of the connecting component, which is also a position where hands are not placed, or a position where hands are generally not placed. This can effectively prevent hands from being pinched, reduce safety hazards, and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the first embodiment of the present utility model (the seat back is in the unfolded state);

[0027] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present utility model (the seat back is in a folded and stowed state);

[0028] Figure 3It is a schematic diagram of the structure of the connection part and the mounting part in the first embodiment of the present utility model at the inner end viewing state (the seat back is in the unfolded state);

[0029] Figure 4 It is a schematic structural diagram of the connection between the connecting component and the mounting component in the first embodiment of the present invention under the inner end viewing state (the seat back is in the process of being folded and stored).

[0030] Among them: 1. Seat bottom plate; 2. Seat back; 3. Installation component; 4. Connecting component; 5. Installation groove; 6. Limiting groove; 7. Limiting part; 8. Support positioning platform; 9. Arc-shaped supporting surface; 10. Connecting part; 11. Folding groove; 12. Stopper; 13. Connecting arc surface. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0032] Example 1: See Figures 1 to 4 As shown, a hand-pinch-proof seat back structure comprises a seat bottom plate 1 and a seat back plate 2, wherein two sides of the seat back plate 2 are rotatably connected to two sides of the rear end of the seat bottom plate 1,

[0033] The rear end of the seat bottom plate 1 is provided with mounting parts 3 extending upwards, and the bottom of the seat back 2 is provided with connecting parts 4 extending downwards, and the inner side of the mounting parts 3 is provided with a mounting groove 5, and each connecting part 4 is rotatably installed in the mounting groove 5 corresponding to the mounting part 3;

[0034] The bottom of the installation groove 5 is also provided with a limiting groove 6, and the bottom of the connecting component 4 is provided with a limiting portion 7 arranged in the limiting groove 6;

[0035] When the seat back 2 is unfolded, the top of the seat back 2 is arranged away from the top plane of the seat bottom plate 1, and the front end surface of the limiting portion 7 abuts against the front end inner wall of the limiting groove 6;

[0036] When the seat back 2 is in the folded and stored state, the top of the seat back 2 is disposed close to the top plane of the seat bottom plate 1 , and the limiting portion 7 is disposed away from the front end inner wall of the limiting groove 6 .

[0037] In this embodiment, the seat bottom is installed on the mobility scooter. The seat back has two states, one is the unfolded state, that is, when the user sits on the seat bottom, the user's back can lean on the seat back; the other state is the folded storage state, that is, the seat back is flipped forward so that the entire seat back is close to the seat bottom, or the seat back is against the seat bottom, so that it is convenient to fold and store the seat back when transporting or putting away the mobility scooter, which can reduce the space occupied, and can also reduce the transportation space occupied and reduce the transportation cost.

[0038] In this embodiment, when the seat back is initially in the folded storage state and needs to be converted to the standing unfolded state, the user applies a push force to the top of the seat back toward the rear and upward, driving the seat back to flip, so that the angle between the seat back and the top surface of the seat bottom plate gradually increases. In this process, the seat back is rotatably connected to the mounting component through the connecting components and the mounting component on both sides of its bottom, so that the seat back rotates around the mounting component. Among them, a mounting groove is provided on the inner side of the mounting component, the top of the mounting groove is connected to the top of the mounting component, a limiting groove is also provided at the bottom of the mounting groove, and a limiting part facing the limiting groove is provided at the bottom of the connecting component, and the limiting part rotates in the limiting groove. During the unfolding process of the seat back, the limiting part is arranged close to the front inner wall of the limiting groove. When the front end surface of the limiting part contacts the front inner wall of the limiting groove, the seat back cannot continue to flip toward the rear side. Taking the perspective of the figure as an example, during the unfolding process of the seat back, the seat back rotates counterclockwise, and during the folding and folding process of the seat back, the seat back rotates clockwise. When the limiting part contacts the front inner wall of the limiting groove, the front inner wall of the limiting groove and the limiting part limit the counterclockwise rotation of the seat back, thereby completing the unfolding of the seat back. In this way, when the user sits on the seat bottom plate with his back against the seat back, the seat back will not continue to flip counterclockwise, thus playing a supporting and supporting role for the user. When it is necessary to convert the unfolded state to the folded and stored state, an external force is applied to the top of the seat back to push the seat back to rotate clockwise. During this process, the limiting part rotates clockwise away from the front inner wall of the limiting groove, and the seat back can rotate clockwise normally. When the front end surface of the seat back approaches the top surface of the seat bottom plate, or is against the top surface of the seat bottom plate, it is switched to the folded and stored state.

[0039] In the present invention, the limit groove and the limit part are arranged at the bottom of the seat back and are located in the installation groove of the installation component. The bottom of the seat back is not often used and is also a position where users seldom put their hands. At the same time, the limit groove is also arranged close to the seat bottom plate. When the user sits on the seat bottom plate, the hands will not be placed in this position. In addition, the space of the installation groove and the limit groove is narrow, which can effectively prevent hands from being pinched and reduce safety hazards.

[0040] See also Figure 3 , 4 As shown, the top and front end of the mounting groove 5 are respectively connected to the top surface and front end surface of the mounting component 3;

[0041] The front of the inner side of the installation groove 5 is connected to the inner side of the installation component 3 , and the rear of the inner side of the installation groove 5 is not connected to the inner side of the installation component 3 .

[0042] The top and front end of the mounting groove are connected to the top and front end of the mounting component, which facilitates the unfolding and folding of the seat back without affecting the switching of the seat back state. The front end of the inner side is connected to the inner side of the mounting component, which facilitates the insertion of the connecting component into the mounting groove and the use of the component to rotatably connect the connecting component and the mounting component. Of course, the inner side of the mounting groove may not be connected to the inner side of the mounting component, so that the user's hand cannot be placed in the limit groove, further improving the safety of use.

[0043] See also Figure 3 , 4 As shown, a supporting and positioning platform 8 is provided at the front side of the bottom of the installation groove 5, and the limiting groove 6 is formed between the rear end surface of the supporting and positioning platform 8 and the inner surface of the bottom of the installation groove 5;

[0044] When the seat back 2 is in the unfolded state, the front end surface of the limiting portion 7 abuts against the rear side surface of the supporting positioning platform 8 .

[0045] In this embodiment, a limiting groove is formed between the rear side of the support positioning platform and the bottom of the installation groove, that is, the limiting part is limited by the support positioning platform, so that the seat back cannot continue to flip over in the unfolded state, playing a supporting and limiting role.

[0046] See also Figure 3 , 4 As shown, the bottom surface of the supporting positioning platform 8 is provided with an arc-shaped supporting surface 9, the connecting component 4 is rotatably connected to the mounting component 3 via a connecting member 10, and the connecting member 10 is coaxially arranged with the arc-shaped supporting surface 9;

[0047] The outer surface of the connecting member 4 at the front side of the limiting portion 7 matches the arcuate supporting surface 9, and part of the outer surface of the connecting member 4 at the front side of the limiting portion 7 abuts against the arcuate supporting surface 9. Of course, the outer surface of the connecting member at the front side of the limiting portion may not abut against the arcuate supporting surface.

[0048] In this embodiment, an arc-shaped supporting surface is provided on the supporting positioning platform, and the outer surface portion of the connecting component is against the arc-shaped supporting surface. In this way, when the connecting component rotates relative to the mounting component, the connecting component and the seat back can be supported by the arc-shaped supporting surface, thereby preventing the connecting component from applying excessive force to the connecting part and causing deformation or damage to the connecting part.

[0049] Among them, part of the rear end outer surface of the limiting part will be in contact with the inner surface of the installation groove on the rear side of the supporting positioning platform (i.e. the inner surface of the limiting groove), so that part of the rear end outer surface of the limiting part will also contact the inner surface of the installation groove, and also play a supporting and limiting role.

[0050] See also Figure 3 , 4 As shown, a folding groove 11 is provided on the inner side of the top of the mounting component 3, and the folding groove 11 is provided close to the rear side of the mounting component 3, and the rear side surface of the folding groove 11 is provided flush with the rear side surface of the mounting groove 5, and the other side of the folding groove 11 is connected to the mounting groove 5;

[0051] A stopper 12 facing the folding groove 11 is disposed on the inner side of the connecting component 4 . When the seat back 2 is in an unfolded state, the bottom of the stopper 12 abuts against the bottom surface of the folding groove 11 .

[0052] When the seat back 2 is in the folded and stored state, the stopper 12 is separated from the folding groove 11 and is disposed away from the folding groove 11 .

[0053] In this embodiment, by providing a folding groove and a stopper, when the seat back is unfolded, the stopper also rests on the bottom surface of the folding groove. In this way, when the seat back is limited by the limiting portion and the limiting groove, the stopper and the folding groove can be used for secondary reinforcement support and positioning, thereby increasing the support and positioning strength, preventing damage to the limiting portion or the support positioning platform, and allowing the installation components and the connecting components to be subjected to force as much as possible as a whole, thereby dispersing the force, extending the service life, and reducing the maintenance rate.

[0054] At the same time, the folding groove is arranged on the inner side of the top of the installation component, which is not the normal place for the hand and is not prone to pinching the hand.

[0055] The folding groove is connected to the mounting groove or not. The folding groove can be connected to the mounting groove or not. In this embodiment, the folding groove is connected to the mounting groove.

[0056] For further information, see Figures 1 to 4 As shown, the inner side of the stopper 12 is connected to the bottom surface of the seat back 2 via the connecting cambered surface 13. In this way, even if the user touches this position with his hand, the cambered surface will not scratch the user because it is the connecting cambered surface.

[0057] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0058] In the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral one; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, for example, the two can form a mechanical abutment or abutment connection through abutment, contact, etc., the two can also be directly hung or hung through an intermediate medium, etc., or it can be the internal connection of the two elements or the interaction relationship between the 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.

Claims

1. A hand-pinch-proof seat back structure, comprising a seat bottom plate and a seat back plate, wherein two sides of the seat back plate are rotatably connected to two sides of a rear end of the seat bottom plate, respectively, and characterized in that: The rear end of the seat bottom plate is provided with mounting components extending upwards, and the bottom of the seat back is provided with connecting components extending downwards, and the inner side of the mounting components is provided with a mounting groove, and each connecting component is rotatably installed in the mounting groove of the corresponding mounting component; The bottom of the installation groove is also provided with a limiting groove, and the bottom of the connecting component is provided with a limiting portion arranged in the limiting groove; When the seat back is in an unfolded state, the top of the seat back is arranged away from the top plane of the seat bottom plate, and the front end surface of the limiting portion abuts against the front end inner wall of the limiting groove; When the seat back is in the folded and stored state, the top of the seat back is arranged close to the top plane of the seat bottom plate, and the limiting portion is arranged away from the front end inner wall of the limiting groove.

2. The anti-pinch seat back structure according to claim 1, characterized in that: The top and front end of the mounting groove are respectively connected to the top surface and front end surface of the mounting component; And / or, the front end of the inner side of the installation groove is connected to the inner side surface of the installation component.

3. The anti-pinch seat back structure according to claim 2, characterized in that: A support and positioning platform is provided at the front side of the bottom of the installation groove, and the limiting groove is formed between the rear end surface of the support and positioning platform and the inner surface of the bottom of the installation groove; And / or, when the seat back is in the unfolded state, the front end surface of the limiting portion abuts against the rear side surface of the supporting positioning platform.

4. The anti-pinch seat back structure according to claim 3, characterized in that: The bottom surface of the supporting positioning platform is provided with an arc-shaped supporting surface, the connecting component is rotatably connected to the mounting component via a connecting member, and the connecting member is coaxially arranged with the arc-shaped supporting surface; The outer surface of the connecting component on the front side of the limiting portion matches the arc-shaped supporting surface; And / or, part of the outer surface of the connecting component on the front side of the limiting portion abuts against the arc-shaped supporting surface.

5. The anti-pinch seat back structure according to claim 2, characterized in that: A folding groove is provided on the inner side of the top of the mounting component, the folding groove is arranged close to the rear side of the mounting component, the rear side surface of the folding groove is arranged flush with the rear side surface of the mounting groove, and the other side of the folding groove is connected to the mounting groove; A stopper is provided on the inner side surface of the connecting component and faces the folding groove. When the seat back is in an unfolded state, the bottom of the stopper abuts against the bottom surface of the folding groove.

6. The anti-pinch seat back structure according to claim 1, characterized in that: A folding groove is provided on the inner side of the top of the mounting component, and a stopper facing the folding groove is provided on the inner side of the connecting component. When the seat back is unfolded, the bottom of the stopper abuts against the bottom surface of the folding groove.

7. The anti-pinch seat back structure according to claim 5 or 6, characterized in that: The folding groove is connected to or not connected to the mounting groove.

8. The anti-hand pinching seat back structure according to claim 5 or 6, characterized in that: When the seat back is in the folded and stored state, the blocking member is separated from the folding groove and is arranged away from the folding groove.

9. The anti-pinch seat back structure according to claim 5 or 6, characterized in that: The inner side surface of the stopper is connected to the bottom surface of the seat back via a connecting arc surface.

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