Seat chassis structure

Abstract

The utility model relates to a seat chassis structure, and relates to the technical field of seat manufacturing, the seat chassis structure comprises a chassis body, a backup plate, a first torsion spring, the first torsion spring drives the backup plate to rotate upwards, and an auxiliary assembly used for sharing the acting force on the first torsion spring and reducing the rebound acting force of the backup plate; the base plate is rotationally arranged on the base plate body; the second torsional spring is used for preventing the bearing plate from rotating upwards; and the top plate is rotationally arranged on the bearing plate. According to the application, the backup plate is driven to move downwards and extrude the first torsion spring to store energy, the backup plate drives the top plate to move upwards, and the upwards-moving top plate drives the bearing plate to move upwards and extrude the second torsion spring to store energy, so that the balance acting force of a user leaning backwards is shared by the first torsion spring and the second torsion spring; the rebound acting force is reduced through downward movement of the top plate and the bearing plate, and finally the thrust borne by a user after the user leaves the backrest of the seat is reduced, so that the user feels more comfortable when sitting on the seat.

Description

Technical Field

[0001] The present application relates to the technical field of seat manufacturing, and in particular to a seat chassis structure. Background Art

[0002] The seat backrest angle adjustment and the seat backrest reset force adjustment are mainly completed by the chassis body.

[0003] Under normal circumstances, the chassis body structure is only equipped with a torsion spring to support the seat back. During normal use, the user presses down on the seat back, causing the seat back to rotate. At the same time, the torsion spring undergoes elastic deformation and stores energy. When the user leaves the seat back, the torsion spring restores its deformation, thereby returning the seat back to its original position.

[0004] However, since the torsion spring recovers its deformation quickly, when the user leaves the seat back, the torsion spring that instantly recovers its deformation will generate a large thrust, causing the seat back to instantly return to its original position. In this process, the user will also be affected by the thrust, resulting in a poor experience. Utility Model Content

[0005] In order to reduce the thrust received by a user after leaving the seat back and make the user more comfortable sitting on the seat, the present application provides a seat chassis structure.

[0006] This application provides a seat chassis structure, which adopts the following technical solutions:

[0007] A seat chassis structure includes a chassis body disposed on the seat, a backrest plate rotatably disposed at one end of the chassis body, a first torsion spring disposed on the chassis body, two ends of the first torsion spring respectively disposed on the chassis body and the backrest plate and driving the backrest plate to rotate upward, and an auxiliary component disposed on the chassis body for sharing the force of the first torsion spring and reducing the rebound force of the backrest plate, the auxiliary component comprising:

[0008] A receiving plate, the receiving plate being rotatably mounted on the chassis body and located on a side of the chassis body away from the support plate;

[0009] a second torsion spring, the second torsion spring being arranged on the chassis body and being used to prevent the receiving plate from rotating upward;

[0010] The top plate has one end rotatably arranged on the receiving plate, and one end of the top plate away from the receiving plate is rotatably arranged on the backing plate. When the backing plate rotates downward, the receiving plate is driven to rotate upward through the top plate.

[0011] By adopting the above technical solution, when the user sits on the seat and leans back, the backrest is driven to move downward and the first torsion spring is squeezed and stored with energy. The backrest drives the top plate to move upward, and the upward-moving top plate drives the receiving plate to move upward and squeezes and stores energy in the second torsion spring, so that the balancing force of the user leaning back is shared by the first torsion spring and the second torsion spring. When the user leaves the backrest, the rebound force is reduced by the downward movement of the top plate and the receiving plate, which ultimately reduces the thrust received by the user after leaving the seat back, making the person more comfortable sitting on the seat.

[0012] Furthermore, the back plate is rotatably set on the chassis body through a first rotating shaft, and a first support rod is provided on the back plate. The first support rod is located on the side of the first rotating shaft away from the middle of the chassis body. The first torsion spring is sleeved on the first rotating shaft and one end is fixed on the chassis body, and the other end of the first torsion spring is pressed against the bottom of the first support rod.

[0013] By adopting the above technical solution, the first torsion spring is installed on the chassis body through the first rotating shaft sleeve. At the same time, by pressing one end of the torsion spring against the bottom of the first support rod, the first torsion spring drives the first support rod to rotate upward after the user leaves the backrest.

[0014] Furthermore, a second support rod is rotatably provided on the back plate, the second support rod is located on a side of the first rotation axis close to the receiving plate, and the top plate is rotatably provided on the back plate through the second support rod.

[0015] By adopting the above technical solution, the second support rod is used to drive the top plate to rotate along with the back plate.

[0016] Furthermore, a sliding groove is provided on the chassis body to facilitate the sliding of the second support rod. The sliding groove is an arc-shaped through groove with the first rotation axis as the center line. The sliding groove is used to limit the rotation angle of the support plate.

[0017] By adopting the above technical solution, the sliding groove facilitates guiding the sliding of the second support rod, and at the same time limits the maximum and minimum rotation angles of the backrest through the sliding groove, preventing the backrest from rotating too much and causing damage to the seat and improving the safety of the seat.

[0018] Furthermore, a third support rod is provided on the chassis body, the second torsion spring is sleeved on the third support rod, the two ends of the second torsion spring are respectively pressed against the chassis body and the supporting plate and prevent the supporting plate from rotating upward, and a torsion spring bushing is provided between the third support rod and the second torsion spring.

[0019] By adopting the above technical solution, the second torsion spring is installed on the third support rod through the torsion spring bushing, and finally the second torsion spring is installed on the chassis body, thereby absorbing the vibration generated when the receiving plate rotates, thereby improving the stability of the second torsion spring.

[0020] Furthermore, the supporting plate is rotatably set on the chassis body through the second rotating shaft, and the top plate is rotatably set on the supporting plate through the third rotating shaft. The second rotating shaft and the third rotating shaft are respectively located on opposite sides of the third support rod, and the two ends of the second torsion spring are respectively pressed against the top of the second rotating shaft and the third rotating shaft and prevent the supporting plate from rotating upward.

[0021] By adopting the above technical solution, when the top plate drives the receiving plate to rotate upward with the second rotating shaft as the axis through the third rotating shaft, the second torsion spring is squeezed and energy is stored.

[0022] Furthermore, two groups of the first torsion springs are provided, and the two groups of the first torsion springs are both sleeved on the first rotating shaft and symmetrically arranged.

[0023] By adopting the above technical solution, two groups of first torsion springs are symmetrically arranged on the first rotating shaft, so that after the user leaves the backrest, the first torsion springs drive the backrest to return to its original position.

[0024] Furthermore, the chassis body includes:

[0025] a bottom plate, the bottom plate being arranged on a support column of the seat;

[0026] The two groups of vertical plates are respectively located on the opposite ends of the bottom plate, and the two ends of the first rotating shaft are respectively rotatably mounted on the two groups of vertical plates. A cavity is formed between the bottom plate and the two groups of vertical plates for accommodating other control components.

[0027] By adopting the above technical solution, the first rotating shaft is rotatably mounted on the two sets of vertical plates, and the cavity formed between the two sets of vertical plates and the bottom plate is convenient for installing other control components.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] When the user sits on the seat and leans back, the backrest is driven downward and the first torsion spring is squeezed and energy is stored. The top plate is driven upward by the second support rod. The upward moving top plate drives the receiving plate upward and squeezes the second torsion spring to store energy, so that the balancing force of the user leaning back is shared by the first torsion spring and the second torsion spring. When the user leaves the seat back, the rebound force is reduced by the downward movement of the top plate and the receiving plate, which ultimately reduces the thrust received by the user after leaving the seat back, making the user more comfortable sitting on the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the seat chassis body structure of the present application;

[0031] Figure 2 yes Figure 1 Schematic cross-section of the middle AA;

[0032] Figure 3 This is a structural diagram of the seat chassis structure of the present application, in which the top plate is not shown and only one group of the first torsion springs is shown.

[0033] Figure numerals: 1. chassis body; 11. bottom plate; 12. vertical plate; 121. sliding groove; 13. first rotating axis; 14. second rotating axis; 15. third support rod; 16. cavity; 2. support plate; 21. first support rod; 22. second support rod; 3. first torsion spring; 31. torsion spring bushing; 4. auxiliary component; 41. receiving plate; 411. third rotating axis; 42. second torsion spring; 43. top plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-3 This application is described in further detail.

[0035] An embodiment of the present application discloses a seat chassis structure.

[0036] Reference Figure 1 and Figure 2 A seat chassis structure includes a chassis body 1 arranged on the seat, a back plate 2 is rotatably arranged at one end of the chassis body 1, a first torsion spring 3 is arranged on the chassis body 1, and the two ends of the first torsion spring 3 are respectively arranged on the chassis body 1 and the back plate 2 and drive the back plate 2 to rotate upward, and an auxiliary component 4 is provided on the chassis body 1 for sharing the force of the first torsion spring 3 and reducing the rebound force of the back plate 2.

[0037] Reference Figure 2 and Figure 3 The chassis body 1 includes a bottom plate 11 and a vertical plate 12. The bottom plate 11 is fixedly mounted on the bottom support column of the seat. There are two groups of vertical plates 12, and the two groups of vertical plates 12 are respectively located on the opposite ends of the bottom plate 11. A first rotating shaft 13 is rotatably provided on the chassis body 1. The two ends of the first rotating shaft 13 are rotatably mounted on the two groups of vertical plates 12. The back plate 2 is rotatably mounted on the chassis body 1 through the first rotating shaft 13. The back plate 2 is located on the opposite side of the vertical plate 12. A cavity 16 is formed between the bottom plate 11 and the two groups of vertical plates 12 for placing other control components.

[0038] Reference Figure 2 and Figure 3A first support rod 21 is fixedly installed on the backrest plate 2, and the first support rod 21 is located on the side of the first rotating shaft 13 away from the middle of the chassis body 1; the first torsion spring 3 is sleeved on the first rotating shaft 13 through the torsion spring bushing 31, and one end of the first torsion spring 3 is pressed against the bottom of the first support rod 21, and the other end of the first torsion spring 3 is fixedly installed on the base plate 11; when the user sits on the seat and leans back, the backrest plate 2 is forced to rotate downward with the first rotating shaft 13 as the axis, thereby increasing the energy storage of the first torsion spring 3; when the user leaves the backrest of the seat, the first torsion spring 3 drives the backrest plate 2 to rotate upward with the first rotating shaft 13 as the axis; at the same time, the vibration generated when the first torsion spring 3 is squeezed to store energy and release energy is absorbed by the torsion spring bushing 31, thereby buffering and absorbing the vibration of the movement of the first torsion spring 3, thereby improving the stability of the first torsion spring 3.

[0039] Reference Figure 2 and Figure 3 The auxiliary component 4 includes a receiving plate 41, a second torsion spring 42 and a top plate 43. A second rotating shaft 14 is rotatably provided on the chassis body 1. The two ends of the second rotating shaft 14 are rotatably mounted on the two sets of vertical plates 12. The receiving plate 41 is rotatably mounted on the chassis body 1 through the second rotating shaft 14. The receiving plate 41 is located on the opposite side of the vertical plate 12.

[0040] Reference Figure 2 and Figure 3 A third support rod 15 is provided on the chassis body 1, and a second torsion spring 42 is installed on the third support rod 15 through a torsion spring bushing 31. The two ends of the second torsion spring 42 are respectively pressed against the chassis body 1 and the receiving plate 41. The second torsion spring 42 is used to prevent the receiving plate 41 from rotating upward, and the torsion spring bushing 31 cushions the movement of the second torsion spring 42 and absorbs vibration.

[0041] Reference Figure 2 and Figure 3 A third rotating shaft 411 is rotatably mounted on the end of the receiving plate 41 away from the chassis body 1, and the top plate 43 is rotatably mounted on the receiving plate 41 through the third rotating shaft 411. The second rotating shaft 14 and the third rotating shaft 411 are respectively located on opposite sides of the third support rod 15, and the two ends of the second torsion spring 42 are respectively pressed against the top of the second rotating shaft 14 and the third rotating shaft 411, thereby preventing the second torsion spring 42 from rotating upward.

[0042] Reference Figure 2 and Figure 3A second support rod 22 is rotatably mounted on the back plate 2, and the second support rod 22 is located on the side of the first rotating shaft 13 close to the receiving plate 41. The top plate 43 is rotatably mounted on the back plate 2 through the second support rod 22. By respectively arranging the second support rod 22 and the first support rod 21 on opposite sides of the first rotating shaft 13, the moving directions of the first support rod 21 and the second support rod 22 are rotationally symmetrical about the axis of the second rotating shaft 14; specifically, when the first support rod 21 rotates upward, the second support rod 22 rotates downward.

[0043] Reference Figure 2 A sliding groove 121 is provided on the side wall of the vertical plate 12 to facilitate the sliding of the second support rod 22. The sliding groove 121 is an arc-shaped through groove with the first rotating shaft 13 as the center line. When the back plate 2 rotates, the second support rod 22 is driven to slide in the sliding groove 121; at the same time, when the second support rod 22 is pressed against the opposite ends of the sliding groove 121, the rotation angle of the back plate 2 is limited by the second support rod 22.

[0044] Reference Figure 2 and Figure 3 Two groups of first torsion springs 3 are sleeved on the first rotating shaft 13. The two groups of first torsion springs 3 are symmetrically arranged along the first transmission shaft, thereby supporting the two ends of the same side of the back plate 2, so as to provide sufficient force for the back plate 2; wherein the two groups of first torsion springs 3 are sleeved on the first rotating shaft 13 through the torsion spring bushing 31.

[0045] Reference Figure 2 and Figure 3 When the user sits on the seat and leans back, the backrest 2 is forced to rotate downward with the first rotation axis 13 as the axis, and the first torsion spring 3 is squeezed and stored through the first support rod 21. At the same time, the second support rod 22 rotates upward in the sliding groove 121 and drives the top plate 43 to move upward. The top plate 43 drives the receiving plate 41 to rotate upward with the second rotation axis 14 as the axis through the third rotation axis 411, thereby squeezing and storing energy on the second torsion spring 42. Finally, the force used for balancing when the user leans back is shared by the first torsion spring 3 and the second torsion spring 42; when the user leaves the backrest, the first torsion spring 3 drives the backrest The seat backrest 2 is rotated upward with the first rotating shaft 13 as the axis, and the top plate 43 is driven downward by the second support rod 22. At the same time, the second torsion spring 42 drives the receiving plate 41 downward, and the top plate 43 is driven downward by the third rotating shaft 411. The downward movement of the top plate 43 and the receiving plate 41 reduces the rebound force of the backrest 2, thereby reducing the thrust exerted on the user after leaving the seat backrest, making the user more comfortable sitting on the seat. In this embodiment, the first rotating shaft 13, the second rotating shaft 14, the third rotating shaft 411, the first support rod 21, the second support rod 22, and the third support rod 15 are all installed parallel to each other.

[0046] The working principle of the embodiment of this application is as follows:

[0047] When the user sits on the seat and leans back, the backrest 2 is driven to move downward and the first torsion spring 3 is squeezed and stored with energy. The top plate 43 is driven to move upward through the second support rod 22. The upward moving top plate 43 drives the receiving plate 41 upward and squeezes the second torsion spring 42 to store energy, so that the balancing force of the user leaning back is shared by the first torsion spring 3 and the second torsion spring 3 42. When the user leaves the backrest, the rebound force is reduced by moving the top plate 43 and the receiving plate 41 downward, which ultimately reduces the thrust the user receives after leaving the seat backrest, making the person sitting on the seat more comfortable.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A seat chassis structure, characterized in that: The invention comprises a chassis body (1) arranged on a seat, a back plate (2) being rotatably arranged on one end of the chassis body (1), a first torsion spring (3) being arranged on the chassis body (1), two ends of the first torsion spring (3) being respectively arranged on the chassis body (1) and the back plate (2) and driving the back plate (2) to rotate upward, an auxiliary component (4) for sharing the force of the first torsion spring (3) and reducing the rebound force of the back plate (2) being arranged on the chassis body (1), and the auxiliary component (4) comprising: A receiving plate (41), the receiving plate (41) being rotatably mounted on the chassis body (1) and located on a side of the chassis body (1) away from the support plate (2); a second torsion spring (42), the second torsion spring (42) being arranged on the chassis body (1), and the second torsion spring (42) being used to prevent the receiving plate (41) from rotating upward; A top plate (43), one end of the top plate (43) is rotatably mounted on the receiving plate (41), and one end of the top plate (43) away from the receiving plate (41) is rotatably mounted on the back plate (2). When the back plate (2) rotates downward, the receiving plate (41) is driven to rotate upward via the top plate (43).

2. A seat chassis structure according to claim 1, characterized in that: The backing plate (2) is rotatably arranged on the chassis body (1) via a first rotating shaft (13); a first support rod (21) is arranged on the backing plate (2); the first support rod (21) is located on a side of the first rotating shaft (13) away from the middle of the chassis body (1); the first torsion spring (3) is sleeved on the first rotating shaft (13) and one end is fixed on the chassis body (1); the other end of the first torsion spring (3) is pressed against the bottom of the first support rod (21).

3. The seat chassis structure according to claim 1, characterized in that: A second support rod (22) is rotatably provided on the back plate (2), and the second support rod (22) is located on a side of the first rotation axis (13) close to the receiving plate (41). The top plate (43) is rotatably provided on the back plate (2) via the second support rod (22).

4. The seat chassis structure according to claim 3, characterized in that: The chassis body (1) is provided with a sliding groove (121) for facilitating the sliding of the second support rod (22). The sliding groove (121) is an arc-shaped through groove with the first rotating shaft (13) as the center line. The sliding groove (121) is used to limit the rotation angle of the support plate (2).

5. The seat chassis structure according to claim 1, characterized in that: A third support rod (15) is provided on the chassis body (1), and the second torsion spring (42) is sleeved on the third support rod (15). Two ends of the second torsion spring (42) respectively press against the chassis body (1) and the receiving plate (41) and prevent the receiving plate (41) from rotating upward. A torsion spring bushing (31) is provided between the third support rod (15) and the second torsion spring (42).

6. The seat chassis structure according to claim 5, characterized in that: The receiving plate (41) is rotatably mounted on the chassis body (1) via a second rotating shaft (14), and the top plate (43) is rotatably mounted on the receiving plate (41) via a third rotating shaft (411). The second rotating shaft (14) and the third rotating shaft (411) are respectively located on opposite sides of the third support rod (15). Both ends of the second torsion spring (42) are respectively pressed against the top of the second rotating shaft (14) and the top of the third rotating shaft (411) to prevent the receiving plate (41) from rotating upward.

7. The seat chassis structure according to claim 2, characterized in that: Two groups of the first torsion springs (3) are provided, and the two groups of the first torsion springs (3) are both sleeved on the first rotating shaft (13) and symmetrically arranged.

8. The seat chassis structure according to claim 2, characterized in that: The chassis body (1) comprises: A bottom plate (11), the bottom plate (11) being arranged on a support column of the seat; Vertical plates (12), two groups of the vertical plates (12) are respectively located at opposite ends of the bottom plate (11), the two ends of the first rotating shaft (13) are respectively rotatably mounted on the two groups of vertical plates (12), and a cavity (16) for accommodating other control components is formed between the bottom plate (11) and the two groups of vertical plates (12).

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