Seat backrest suspension spring, seat backrest, vehicle seat and vehicle

Abstract

The utility model relates to a seat backrest suspension spring, a seat backrest, a vehicle seat and a vehicle, and the seat backrest suspension spring comprises a first pull wire and two frames; framework fixing points are arranged at the bottoms of the two frames; the first stay wire is fixed to the two frames respectively, first framework connecting points are formed at the two ends of the first stay wire respectively, and the first stay wire is further provided with first elastic bent parts between the frames and the first framework connecting points. The overall rigidity of the seat backrest suspension spring is inconsistent, and when the seat backrest suspension spring is subjected to the acting force of a user on the seat backrest, the seat backrest suspension spring can elastically deform at the first pull wire, so that the back of the user sinks more, the molded surface of the seat backrest is more attached to the backrest of the human body, the requirements of different users are met, and the comfort is good.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a seat back suspension spring, a seat back, a vehicle seat, and a vehicle. Background Technology

[0002] A seat consists of a seat cushion and a seat back. The seat back includes a backrest frame and a backrest foam layer. To improve the comfort of the seat back, a lumbar support is usually installed in the seat back. However, the lumbar support can only adjust the height of the lumbar support, not the firmness of the backrest foam layer, resulting in poor comfort.

[0003] Furthermore, in practical applications, different users have different requirements for the firmness of the seat back. Existing technologies for seat backs lack the function of adjusting the firmness of the backrest foam layer, which cannot meet the needs of different user groups and results in poor comfort.

[0004] Therefore, how to improve the comfort of seat backrests is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a seat back suspension spring, a seat back, a vehicle seat, and a vehicle, which can effectively improve the comfort of the seat back and enhance the user experience.

[0006] To solve the above-mentioned technical problems, this application provides a seat back suspension spring, including a first pull wire and two frames; the bottom of the two frames is provided with a frame fixing point; the first pull wire is fixed to the two frames respectively, and the two ends of the first pull wire respectively form a first frame connection point, and the first pull wire is also provided with a first elastic bending portion between the frame and the first frame connection point.

[0007] Optionally, the first elastic bend may be in the form of a V-bend, and the included angle between the two side walls of the V-bend is 25°-40°.

[0008] And / or, along the length of the frame, the distance between the first pull line and the fixing point of the skeleton is 280mm-320mm.

[0009] Optionally, the first pull wire may further include a second elastic bend disposed between the two frame edges.

[0010] Optionally, the first pull wire is further fixed with a fixing member, the fixing member being located between the two frame edges, and the fixing member having a wire harness fixing point.

[0011] Optionally, it also includes a second pull wire, which is fixed to the top of each of the two frame edges, and the two ends of the second pull wire form a second skeleton connection point, with the first pull wire and the second pull wire spaced apart.

[0012] Optionally, the frame, the first pull wire, and the second pull wire are made of steel wire rope, and the diameter of the frame is larger than the diameter of the first pull wire and the second pull wire.

[0013] Optionally, the diameter of the frame is 3.5mm-4.5mm;

[0014] And / or, at least one of the first pull wire and the second pull wire has a diameter of 2.5mm-3.5mm.

[0015] Optionally, the first pull wire is fixed to the frame and the second pull wire is fixed to the frame by a first fixing part; the first fixing part includes a first injection molded part and a second injection molded part, the first injection molded part and the second injection molded part are fixedly connected, the first injection molded part is fixed to the frame, and the second injection molded part is fixed to the first pull wire or the second pull wire.

[0016] Optionally, it also includes a second fixing part, which is connected to the bottom of the two frame edges respectively, and the second fixing part is fixed with a fixing nut, which forms the fixing point of the skeleton.

[0017] This application also provides a seat back, including a seat back frame and a seat back suspension spring as described above.

[0018] This application also provides a vehicle seat, including a seat cushion and a seat back as described above.

[0019] This application also provides a vehicle including the vehicle seat described above.

[0020] The purpose of this application is to provide a seat back suspension spring, a seat back, a vehicle seat, and a vehicle, which, compared with the prior art, have the following technical effects:

[0021] When a user sits on the seat cushion and leans against the seat back, a backward force is applied to the seat back suspension spring. Since the frame fixing point is fixed to the seat back frame and its position remains unchanged, the position of the first frame connection point at both ends of the first cable also remains unchanged. Therefore, when the seat back suspension spring is subjected to the user's force, the first cable will undergo elastic deformation. Specifically, elastic deformation occurs preferentially at the first elastic bend, and the amount of deformation is related to the force applied by the user to the seat back. For example, the greater the user's weight, the greater the force applied to the seat back, and the greater the elastic deformation at the first elastic bend. Conversely, the smaller the user's weight, the smaller the force applied to the seat back, and the smaller the elastic deformation at the first elastic bend.

[0022] When the seat back suspension spring is subjected to force by the user, the first cable is more prone to deformation than the frame due to the first elastic bending part. In other words, the seat back suspension spring is not a structure with uniform rigidity, but the structure at the first cable is prone to elastic deformation, so as to allow for more sinking at the user's back. Furthermore, the amount of elastic deformation of the first cable corresponds to the user's own situation, which can make the seat back surface fit the human backrest more closely, providing support for the user while ensuring comfort. It can meet the needs of different users and has good comfort. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the seat back suspension spring provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the seat back suspension spring provided in the embodiment of this application in the installed state.

[0025] Appendix Figure 1 and attached Figure 2 The reference numerals in the attached figures are explained as follows:

[0026] 1 frame, 11 supporting bends;

[0027] 2 First pull line, 21 First skeleton connection point, 22 First elastic bending part, 23 Second elastic bending part, 24 Straight line segment;

[0028] 3 Second pull line, 31 Second skeleton connection point, 32 Third elastic bending part;

[0029] 4 First fixing part, 41 First injection molded part, 42 Second injection molded part;

[0030] 5. Second fixing part;

[0031] 6. Skeleton fixing points;

[0032] 7 fasteners, 71 wire harness fixing points;

[0033] 8. Seat backrest frame. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] This application provides a seat back suspension spring, a seat back, a vehicle seat, and a vehicle. The vehicle includes a vehicle seat, specifically, the vehicle has individual seats, such as a driver's seat, a front passenger seat, two individual seats in the second row of a commercial vehicle, and also includes a row of seats, such as the rear seats. The vehicle seat includes a seat cushion and a seat back, with the seat back located behind the seat cushion. The user sits on the seat cushion and can lean against the seat back, which provides support for the user's back to ensure the user's riding comfort.

[0036] The seat back includes the seat back frame 8, the seat back suspension springs, and the foam layer, etc., among which, such as Figure 1 and Figure 2 As shown, the seat back suspension spring is installed on the seat back frame 8 and is used to adjust the firmness of the seat back to meet the different needs of different user groups.

[0037] Specifically, such as Figure 1 and Figure 2 As shown, the seat back suspension spring includes a frame and a first tension cable 2. The frame includes two side frames 1, whose bottoms are connected to form a U-shaped structure. The bottom of the frame has a frame fixing point 6, which is used to fix the seat back suspension spring to the backrest frame to ensure the installation stability between the seat back suspension spring and the backrest frame. Specifically, each side frame 1 can have a separate frame fixing point 6 at its bottom for fixing to the backrest frame, or the bottoms of the two side frames 1 can be connected and fixed to the backrest frame through the same frame fixing point 6. For ease of explanation, the following description will use the example of two side frames 1 connected at their bottoms and fixed to the backrest frame through the same frame fixing point 6.

[0038] The seat back suspension has a symmetrical structure, specifically symmetrically arranged about the center line passing through the frame fixing point 6 and parallel to the frame 1. Two frame 1s are symmetrically positioned on either side of the frame fixing point 6 to ensure the stability of the seat back suspension spring in the installed state. A first pull wire 2 is fixed to each of the two frame 1s, and each end of the first pull wire 2 forms a first frame connection point 21. This first frame connection point 21 is used to connect to the seat back frame 8. The first pull wire 2 also includes a first elastic bending portion 22 located between the frame 1 and the first frame connection point 21. In other words, each end of the first pull wire 2 has a first elastic bending portion 22, meaning that each first frame connection point 21 has a first elastic bending portion 22 between it and the frame 1 on the same side.

[0039] When a user sits on the seat cushion and leans against the seat back, a backward force is applied to the seat back suspension spring. Since the frame fixing point 6 is fixed to the seat back frame 8 and its position remains unchanged, the positions of the first frame connection points 21 at both ends of the first pull wire 2 also remain unchanged. Therefore, after the seat back suspension spring is subjected to the force of the user, the first pull wire 2 will undergo elastic deformation. Specifically, elastic deformation occurs preferentially at the first elastic bending part 22, and the amount of deformation is related to the force applied by the user to the seat back. For example, the greater the user's weight, the greater the force on the seat back, and the greater the elastic deformation of the first elastic bending part 22. Conversely, the smaller the user's weight, the smaller the force on the seat back, and the smaller the elastic deformation of the first elastic bending part 22.

[0040] When the seat back suspension spring is subjected to the force of the user, the first cable 2 is more prone to deformation than the frame due to the setting of the first elastic bending part 22. In other words, the seat back suspension spring is not a structure with uniform rigidity, but the structure at the first cable 2 is prone to elastic deformation, so as to allow for more sinking at the user's back. Furthermore, the amount of elastic deformation of the first cable 2 corresponds to the user's own situation, which can make the seat back surface fit the human backrest more closely, providing support for the user while ensuring comfort, meeting the needs of different users, and providing good comfort.

[0041] like Figure 1 As shown, along the length of the frame 1, specifically along the height of the seat back, the distance H between the first pull line 2 and the frame fixing point 6 is preferably 280mm-320mm. Of course, this distance H can also be 240mm, 260mm, 340mm, 360mm, etc. When the distance H between the first pull line 2 and the frame fixing point 6 is set to 280mm-320mm, such as 280mm, 300mm, or 320mm, after the user sits on the seat cushion, the position of the first pull line 2 is roughly located above the user's waist on the back. After the user leans against the seat back and applies force, the deformation of the first pull line 2 is relatively large, ensuring that the bottom of the seat back can provide support for the user's waist, while the middle position can provide support for the user's back, ensuring comfort.

[0042] In this embodiment, the specific structure of the first elastic bending portion 22 is not limited, such as... Figure 1 As shown, the first elastic bending portion 22 includes a V-shaped bend, with the included angle between the two side walls of the V-shaped bend being 25°-40°. Of course, in this embodiment, the specific structure of the first elastic bending portion 22 is not limited, such as a U-shaped bend. However, the V-shaped bend is more prone to deformation than the U-shaped bend, so that the deformation of the first pull wire 2 can correspond to different users and improve comfort.

[0043] Furthermore, in this embodiment, the included angle α between the two side walls of the V-shaped bend is not limited. For example, the included angle α can be set to 20°, 23°, 45°, 50°, etc. Setting the included angle α between the two side walls of the V-shaped bend to 25°-40°, such as 25°, 30°, 35°, 40°, etc., can ensure that the first pull wire 2 has sufficient elastic deformation after being subjected to force, while avoiding the situation where the first pull wire 2 undergoes plastic deformation during use due to excessive bending angle.

[0044] like Figure 1 As shown, the first pull wire 2 also includes a straight segment 24, which connects the first elastic bending part 22 and the first skeleton connection point 21. Specifically, there is no limitation on the length of the straight segment 24. For example, the length of the straight segment 24 can be 23mm, or the length of the side wall of the V-shaped bend facing the straight segment 24 can be 55mm, etc.

[0045] like Figure 1 As shown, the first pull cord 2 also has a second elastic bending portion 23, which is located between the two frame parts 1. Specifically, the number of second elastic bending portions 23 is not limited; it can be one, two, or more. Furthermore, the second elastic bending portions 23 are symmetrically arranged. When the seat back is subjected to force from the user, the first pull cord 2 preferentially undergoes elastic deformation at the first elastic bending portion 22 and the second elastic bending portion 23, ensuring sufficient deformation at the user's back and thus guaranteeing comfort. Specifically, the specific structure of the second elastic bending portion 23 is not limited; it can be a V-shaped bend or a similar shape. Figure 1 All U-shaped bends shown are acceptable.

[0046] like Figure 1 As shown, the first pull wire 2 is also fixed with a fastener 7, which is located between the two side frames 1. The fastener 7 is also provided with a wire harness fixing point 71, which can be provided by setting a fixing protrusion or fixing hole for fixing the wire harness buckle. The wire harness fixing point is used to fix the connection wire harness of the seat through the wire harness buckle, so as to achieve neat wiring and facilitate later installation, maintenance and other operations.

[0047] like Figure 1 As shown, the seat back suspension spring also includes a second pull cable 3, which is fixed to the top of the two frames respectively, and the two ends of the second pull cable 3 form second frame connection points 31 respectively. The second frame connection points 31 are used to connect with the seat back frame 8. The first pull cable 2 is located between the frame fixing point 6 and the second pull cable 3. The first pull cable 2 and the second pull cable 3 are spaced apart. The first pull cable 2 is used to support the user's back, and the second pull cable 3 is used to support the user's neck to ensure comfort and support stability.

[0048] The elasticity requirement of the second pull wire 3 is smaller than that of the first pull wire 2, and can be set according to the actual situation.

[0049] In this embodiment, the material of the frame 1, the first pull wire 2, and the second pull wire 3 preferably includes steel wire rope. Furthermore, the diameter of the first pull wire 2 and the second pull wire 3 is smaller than the diameter of the frame 1, making the first pull wire 2 and the second pull wire 3 more prone to elastic deformation compared to the frame 1. This allows the seat back suspension spring to easily undergo elastic deformation at the first pull wire 2 and the second pull wire 3, ensuring comfort. Meanwhile, the frame 1, due to its relatively large diameter, is less prone to deformation, ensuring the support stability of the seat back suspension spring. This also ensures that the deformation of the seat back after being subjected to user force is concentrated at the first pull wire 2 and the second pull wire 3.

[0050] Specifically, the diameter of the frame 1 is preferably 3.5mm-4.5mm. Of course, the diameter of the frame 1 can also be 2.5mm, 3mm, 5mm, 5.5mm, etc. Setting the diameter of the frame 1 to 3.5mm-4.5mm, such as 3.5mm, 4mm, 4.5mm, etc., can ensure the structural stability of the frame while allowing the frame 1 to undergo a certain amount of elastic deformation when subjected to the force of the user. This allows the two frames 1 to deform slightly at the first pull line 2 and the second pull line 3 when the first pull line 2 and the second pull line 3 undergo elastic tensile deformation, so as to match the deformation of the first pull line 2 and the second pull line 3. This ensures that the seat back suspension spring can adapt to the force of the user, thereby ensuring comfort.

[0051] The diameter of the first pull wire 2 is preferably 2.5mm-3.5mm. Of course, the diameter of the first pull wire 2 can also be 2mm, 4mm, etc. Setting the diameter of the first pull wire 2 to 2.5mm-3.5mm, such as 2.5mm, 3mm, 3.5mm, etc., ensures that the first pull wire 2 has sufficient elastic deformation capacity while also ensuring the structural strength of the pull wire, preventing breakage. The diameter of the second pull wire 3 is preferably 2.5mm-3.5mm, with the same effect as the first pull wire 2. For the sake of brevity, it will not be described again here. Furthermore, the diameters of the first pull wire 2 and the second pull wire 3 can be the same or different; there is no restriction here.

[0052] like Figure 1As shown, the first pull wire 2 is fixed to both frame frames 1 via a first fixing part 4. The first fixing part 4 includes a first injection molded part 41 and a second injection molded part 42. The first injection molded part 41 and the second injection molded part 42 can be integrally injection molded, or they can be set as independent structures and fixed together. Specifically, the first injection molded part 41 is injection molded and fixed to the frame frame 1 to form a first injection molded tube that is sleeved and fixed outside the frame frame 1, and the second injection molded part 42 is injection molded and fixed to the first pull wire 2 to form a second injection molded tube that is sleeved outside the first pull wire 2. Of course, there are no restrictions on the fixing method between the first pull line 2 and the frame 1. For example, the first pull line 2 and the frame 1 can be fixed by welding or by clamping nails. When the first pull line 2 and the frame 1 are fixed by the first fixing part 4 that is integrally injection molded, the fixing stability between the first pull line 2 and the frame 1 can be guaranteed, and the situation of the first pull line 2 and the frame 1 separating after long-term use can be avoided. At the same time, it can also simplify the structural requirements of the first pull line 2 and the frame 1. The first pull line 2 and the frame 1 do not need to overlap and can directly cross each other, thereby simplifying the overall structure.

[0053] The second pull wire 3 is fixed to the two frame 1s respectively through the first fixing part 4. The fixing method between the second pull wire 3 and the frame 1 can refer to the fixing method between the first pull wire 2 and the frame 1, and will not be described in detail here.

[0054] like Figure 1 As shown, the frame also includes a second fixing part 5, which is located at the bottom of the two side frames 1 and fixed to the bottom of the two side frames 1 respectively. The second fixing part 5 also has a fixing nut embedded within it, forming the aforementioned frame fixing point 6. The specific structure of the second fixing part 5 is not limited. For example, it can be set as a plastic part integrally injection molded to the bottom of the two frames. The second fixing part 5 and the fixing nut are also integrally injection molded to ensure the stability of the fixing nut between the fixing nut and the bottom of the two side frames 1. During installation, the fixing nut can be fixed to the seat back frame 8 using fasteners, which is relatively convenient. Alternatively, the two side frames 1 can be directly set as a single piece and bent to form a U-shaped structure. The second fixing part 5 is the part connected to the bottom of the two side frames. This second fixing part can be fixed to the seat back frame 8 by welding or other methods to form the aforementioned frame fixing point 6.

[0055] like Figure 1 and Figure 2As shown, the frame 1 is also provided with a support bending part 11, which is located between the first pull line 2 and the second pull line 3. Specifically, the support bending part 11 of the frame 1 protrudes to one side of the other frame 1, so that the two support bending parts 11 are close to each other to form a fan support part. The fan support part is used to provide support for the fan of the seat back, which facilitates the installation of the fan and ensures the stability of the installation.

[0056] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A seat back suspension spring, characterized in that, It comprises a first pull wire (2) and two side frames (1); The bottom of the two side frames (1) is provided with a frame fixing point (6); The first pull wire (2) is fixed with the two side frames (1) respectively, and the two ends of the first pull wire (2) form a first frame connecting point (21) respectively, and the first pull wire (2) is further provided with a first elastic bending part (22) between the side frame (1) and the first frame connecting point (21).

2. The seat back suspension of claim 1, wherein, The form of the first elastic bending part (22) comprises a V-shaped bending, and the included angle between the two side walls of the V-shaped bending is 25°-40°. And / or, along the length direction of the side frame (1), the spacing between the first pull wire (2) and the frame fixing point (6) is 280mm-320mm.

3. The seat back suspension of claim 1, wherein, The first pull wire (2) further comprises a second elastic bending part (23) arranged between the two side frames (1).

4. The seat back suspension of claim 1, wherein, The first pull wire (2) is further provided with a fixing member (7), and the fixing member (7) is located between the two side frames (1), and the fixing member (7) is provided with a wire harness fixing point (71).

5. A seat back suspension according to any one of claims 1-4, characterized in that It further comprises a second pull wire (3), and the second pull wire (3) is fixed with the top of the two side frames (1) respectively, and the two ends of the second pull wire (3) form a second frame connecting point (31) respectively, and the first pull wire (2) and the second pull wire (3) are arranged at intervals.

6. The seat back suspension of claim 5, wherein, The material of the side frame (1), the first pull wire (2) and the second pull wire (3) comprises a steel wire rope, and the diameter of the side frame (1) is greater than the diameter of the first pull wire (2) and the second pull wire (3).

7. The seat back suspension of claim 6, wherein, The diameter of the side frame (1) is 3.5mm-4.5mm; And / or, the diameter of at least one of the first pull wire (2) and the second pull wire (3) is 2.5mm-3.5mm.

8. The seat back suspension of claim 5, wherein, The first pull wire (2) and the second pull wire (3) are fixed between the side frame (1) respectively through a first fixing part (4); The first fixing part (4) comprises a first injection molding part (41) and a second injection molding part (42), the first injection molding part (41) and the second injection molding part (42) are fixedly connected, the first injection molding part (41) is fixed with the side frame (1), and the second injection molding part (42) is fixed with the first pull wire (2) or the second pull wire (3).

9. The seat back suspension of any of claims 1-4, wherein, It further comprises a second fixing part (5), and the second fixing part (5) is connected with the bottom of the two side frames (1) respectively, and the second fixing part (5) is provided with a fixed nut, and the fixed nut forms the frame fixing point (6).

10. A seat back, characterized by It comprises a seat back frame (8) and a seat back suspension as claimed in any one of claims 1-9.

11. A vehicle seat characterized by comprising: It comprises a seat cushion and a seat back as claimed in claim 10.

12. A vehicle characterized by comprising: It comprises a vehicle seat as claimed in claim 11.

Images