Seat tilting mechanism and seat

Abstract

The utility model relates to a seat tilting mechanism and a seat. The seat tilting mechanism comprises a base support, a back rotating support, a V-shaped fixing seat and an annular elastic piece. The left side and the right side of the base support are symmetrically connected with back rotating supports respectively, the two back rotating supports are rotatably arranged on the base support respectively, and the two back rotating supports are each provided with an installation part used for installing a back cushion; the V-shaped fixing seats are rotatably arranged on the two sides of the base support respectively, an opening is formed in the bottom of the annular elastic piece, and the two ends of the opening of the annular elastic piece are connected with the front end and the rear end of the base support respectively. And the top surface of the annular elastic sheet and the top surfaces of the two V-shaped fixing seats jointly form a mounting surface for mounting a seat cushion. The seat tilting mechanism can provide powerful and comfortable waist supports for a user, so that the waist stress of the user is eliminated, the comfort is improved, and better health protection is provided for a human body.

Description

Technical Field

[0001] The utility model relates to the technical field of chairs and seats, in particular to a chair reclining mechanism and a chair. Background Art

[0002] Traditional chairs typically utilize a reclining mechanism positioned beneath the seat cushion, with the seat and back cushions assembled separately on this mechanism. The seat cushion is mounted on a support plate at the top of the mechanism, while the back cushion is mounted on a tray at the rear. The support plate and tray are interconnected. When the user reclines, the tray tilts with them, causing the seat cushion to tilt slightly. While the two are synchronized, the seat cushion's tilt angle is relatively small.

[0003] However, traditional seat designs integrate the reclining mechanism directly into the seat cushion's base. The tilt angles of the back and seat occur underneath the cushion. Because the reclining axis is located below the cushion and the body's reclining axis is located at the coccyx, the resulting reclining trajectories differ. As a result, while the upper portion of the back cushion can rest against the shoulders during reclining, a significant gap exists at the waist, preventing the lower back from contacting the back cushion and leaving the lower back unsupported. This can lead to accumulated stress on the intervertebral discs during prolonged use, potentially damaging health. Utility Model Content

[0004] Based on this, the purpose of the present invention is to overcome the shortcomings of the existing technology and provide a seat reclining mechanism that can always stick to the user's waist during the reclining process, providing the user with strong and comfortable waist support to eliminate the user's waist stress, so that the user can achieve the effect of decompression in different sitting postures and reclining degrees, increase comfort, and provide better health protection for the human body.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A seat reclining mechanism comprises a base bracket, a back rotating bracket, a V-shaped fixing seat, and an annular elastic sheet; the back rotating bracket is symmetrically connected to the left and right sides of the base bracket, the two back rotating brackets are rotatably arranged on the base bracket, and the two back rotating brackets are provided with mounting portions for mounting back cushions; the V-shaped fixing seats are rotatably arranged on both sides of the base bracket, the bottom of the annular elastic sheet is provided with an opening, the two ends of the opening of the annular elastic sheet are respectively connected to the front and rear ends of the base bracket, and the top surface of the annular elastic sheet and the top surfaces of the two V-shaped fixing seats jointly form a mounting surface for mounting a seat cushion.

[0007] As an embodiment, rotating convex shafts are symmetrically provided on both sides of the base bracket, and the two back rotating brackets are rotatably provided on the rotating convex shafts on both sides of the base bracket.

[0008] As an embodiment, L-shaped limit members extend outward on both sides of the base bracket respectively, and a rotating boss is provided on the inner side of the upper end of the L-shaped limit member. The back rotating bracket includes a rotating arm and a mounting arm. The rotating arm is rotatably provided on the rotating cam shaft and the rotating boss. The front end of the mounting arm is integrally connected to the upper end of the rotating arm, and the rear end of the mounting arm extends toward the rear end of the base bracket, and the rear end of the mounting arm is integrally formed with a mounting plate, and the front end surfaces of the mounting plates on the two mounting arms jointly form the mounting portion.

[0009] As an embodiment, a first set of holes and a second set of holes are respectively formed on the rotating arm, the first set of holes is movably sleeved on the rotating convex shaft, and the second set of holes is movably sleeved on the rotating convex column.

[0010] As an embodiment, a first mounting hole is respectively formed through the front end surfaces of the mounting plates on the two mounting arms.

[0011] As an embodiment, the lower ends of the two back rotating brackets are respectively provided with round shafts, the middle bottoms of the two V-shaped fixing seats are respectively provided with fixing sleeves, and the two V-shaped fixing seats are respectively fixedly sleeved on the round shafts of the two back rotating brackets through their respective fixing sleeves.

[0012] As an embodiment, the top surfaces of the two V-shaped fixing seats and the top surface of the annular elastic sheet are located in the same plane, the top surfaces of the two V-shaped fixing seats are penetrated by a second mounting hole, and the top surface of the annular elastic sheet is penetrated by a third mounting hole.

[0013] Compared with the conventional technology, the seat reclining mechanism of the present invention has the following advantages:

[0014] According to the seat reclining mechanism of the present invention, by changing the position of its rotation fulcrum, it is moved to a position close to the coccyx of the human body, so that its movement trajectory during reclining can simulate and be as close as possible to the natural reclining movement trajectory of the human body, so that the back cushion of the seat reclining mechanism of the present invention can always fully stick to the upper body of the human body during the entire reclining process, providing perfect and appropriate support, and giving the user a comfortable sitting feeling.

[0015] When the user reclines the back cushion, the back rotating bracket will tilt and rotate due to the tilting force applied by the back cushion, thereby driving the V-shaped fixed seat and the seat cushion at the bottom to move simultaneously along the rotation trajectory. At this time, the annular elastic sheet under the seat cushion will deform due to its elastic material and output a certain reaction force, thereby forming an elastic force, so that the seat reclining mechanism of the present invention has elasticity, which increases the comfort of the user. Among them, the rotation fulcrum when the back cushion is tilted is on both sides above the seat cushion, and the fulcrum for the upper body to tilt is at the coccyx. The two positions are relatively close, so that the seat reclining mechanism of the present invention is basically the same as the natural tilting movement trajectory of the human body. Therefore, during the reclining process, the back cushion can stick to the entire back of the human body from top to bottom, thereby providing perfect support for the user and preventing the accumulation of lumbar disc stress and discomfort caused by the back cushion being detached and unsupported.

[0016] The present invention also provides a chair comprising the seat reclining mechanism described in the above embodiment. The chair of the present invention, through improvements to the seat reclining mechanism, can provide the user with strong and comfortable lumbar support, thereby eliminating lumbar stress and achieving a stress-reducing effect in various sitting postures and reclining degrees, thereby increasing comfort and providing better health protection for the human body.

[0017] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the seat reclining mechanism of the utility model;

[0019] Figure 2 for Figure 1 A side view of the seat reclining mechanism is shown;

[0020] Figure 3 This is a schematic diagram of the seat reclining mechanism of the present invention;

[0021] Figure 4 This is a functional demonstration diagram of the seat reclining mechanism of the utility model.

[0022] Explanation of the accompanying drawings: 10. Base bracket; 20. Back rotating bracket; 21. Rotating arm; 22. Mounting arm; 23. Mounting portion; 24. First mounting hole; 25. Back pad; 30. Annular elastic sheet; 31. Third mounting hole; 40. V-shaped fixing seat; 41. Second mounting hole; 50. Seat cushion. DETAILED DESCRIPTION

[0023] To further illustrate various embodiments, this utility model is provided with accompanying drawings. These drawings form part of the disclosure of this utility model and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will be able to understand other possible implementations and the advantages of this utility model.

[0024] Traditional seat designs incorporate the reclining mechanism directly into the seat cushion's base. The tilt angles of the back and seat occur underneath the cushion. Because the reclining axis of rotation is located below the cushion and the body's reclining axis is located at the tailbone, the resulting reclining trajectories differ. As a result, while the upper portion of the back cushion can rest against the shoulders during reclining, a significant gap exists at the waist, preventing the lower back from contacting the back cushion and leaving the lower back unsupported. This can lead to accumulated stress on the intervertebral discs over prolonged use, potentially damaging health.

[0025] In view of this, an embodiment of the present invention provides a seat reclining mechanism that can always stick to the user's waist during the reclining process, providing the user with strong and comfortable lumbar support to eliminate the stress on the user's waist, so that the user can achieve the effect of decompression in different sitting postures and reclining degrees, increase comfort, and provide better health protection for the human body.

[0026] See also Figures 1 to 4 , an embodiment of the present invention provides a seat reclining mechanism, including a base bracket 10, a back rotating bracket 20, a V-shaped fixing seat 40, and an annular elastic sheet 30; the left and right sides of the base bracket 10 are symmetrically connected with the back rotating bracket 20, and the two back rotating brackets 20 are rotatably arranged on the base bracket 10, and the two back rotating brackets 20 are provided with a mounting portion 23 for mounting a back cushion 25; the V-shaped fixing seats 40 are rotatably provided on both sides of the base bracket 10, and the bottom of the annular elastic sheet 30 is provided with an opening, and the two ends of the opening of the annular elastic sheet 30 are respectively connected to the front and rear ends of the base bracket 10, and the top surface of the annular elastic sheet 30 and the top surfaces of the two V-shaped fixing seats 40 jointly form a mounting surface for mounting a seat cushion 50.

[0027] like Figure 1As shown, the base bracket 10 of the embodiment of the present invention is symmetrically provided with rotating cams on both sides, and the two back rotating brackets 20 are rotatably provided on the rotating cams on both sides of the base bracket 10. Furthermore, L-shaped limiters are extended outward from both sides of the base bracket 10, and a rotating boss is provided on the inner side of the upper end of the L-shaped limiter. The back rotating bracket 20 includes a rotating arm 21 and a mounting arm 22. The rotating arm 21 is rotatably provided on the rotating cam and the rotating boss. The front end of the mounting arm 22 is integrally connected to the upper end of the rotating arm 21, and the rear end of the mounting arm 22 extends toward the rear end of the base bracket 10. A mounting plate is integrally formed on the rear end of the mounting arm 22. The front end surfaces of the mounting plates on the two mounting arms 22 jointly form the mounting portion 23.

[0028] In this embodiment of the present invention, the rotating arm 21 is provided with a first set of holes and a second set of holes, respectively. The first set of holes is movably mounted on the rotating cam, and the second set of holes is movably mounted on the rotating boss. Furthermore, the front end surfaces of the mounting plates on the two mounting arms 22 are each provided with a first mounting hole 24 extending therethrough. Thus, the mounting portion 23 of this embodiment of the present invention can be connected and secured to the back pad 25 via the first mounting holes 24. For example, screw holes can be provided in the back pad 25, and screws can be passed through the first mounting holes 24 to secure the back pad 25 to the front end surfaces of the mounting plates on the two mounting arms 22.

[0029] According to the seat reclining mechanism of the embodiment of the present invention, the lower ends of the two back rotating brackets 20 are respectively provided with circular shafts, and the middle bottoms of the two V-shaped fixing seats 40 are respectively provided with fixing sleeves, and the two V-shaped fixing seats 40 are respectively fixedly sleeved on the circular shafts of the two back rotating brackets 20 through their respective fixing sleeves.

[0030] The top surfaces of the two V-shaped fixing seats 40 and the top surface of the annular elastic plate 30 are both located in the same plane. A second mounting hole 41 is formed through the top surfaces of the two V-shaped fixing seats 40, and a third mounting hole 31 is formed through the top surface of the annular elastic plate 30. Thus, the two V-shaped fixing seats 40 and the annular elastic plate 30 of the embodiment of the present invention can be connected and fixed to the seat via the second mounting holes 41 and the third mounting holes 31.

[0031] like Figure 3 and Figure 4As shown, when the user reclines the back cushion 25, the back rotating bracket 20, due to the tilting force exerted by the back cushion 25, tilts and rotates accordingly, thereby driving the V-shaped fixed seat 40 and the seat cushion 50 at its bottom to move simultaneously along the rotation trajectory. At this time, the annular elastic sheet 30 below the seat cushion 50, due to its elastic material, is pulled by the seat cushion 50 and deforms, while outputting a certain reaction force, thereby forming an elastic force, which makes the seat reclining mechanism of the present invention elastic and increases the user's comfort. Among them, the rotation fulcrums of the back cushion 25 when tilting are on both sides above the seat cushion 50, and the fulcrum of the upper body when tilting is at the coccyx. The two positions are relatively close, so that the seat reclining mechanism of the present invention basically follows the motion trajectory of the human body when tilting. Therefore, during the reclining process, the back cushion 25 can be attached to the entire back of the user from top to bottom, thereby providing perfect support for the user and preventing the accumulation of lumbar disc stress and discomfort caused by the back cushion 25 being unsupported.

[0032] Therefore, compared with traditional technology, the seat reclining mechanism according to the embodiment of the present invention changes the position of its rotation fulcrum and moves it to a position close to the human coccyx, so that its movement trajectory during reclining can simulate and be as close as possible to the natural reclining movement trajectory of the human body, so that the back pad 25 of the seat reclining mechanism of the present invention can always fully stick to the upper body of the human body during the entire reclining process, providing perfect and appropriate support, and giving the user a comfortable sitting feeling.

[0033] Another embodiment of the present invention provides a chair including the seat reclining mechanism described in the above embodiment. The chair of the present invention, through improvements to the seat reclining mechanism, can provide strong and comfortable lumbar support for the user, thereby eliminating lumbar stress and achieving a stress-reducing effect in various sitting postures and reclining degrees, thereby increasing comfort and providing better health protection for the human body.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0035] The above-described embodiments represent only a few implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the seat reclining mechanism and seat of the present invention. It should be noted that those skilled in the art will readily appreciate that variations and improvements can be made without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A seat reclining mechanism, characterized in that: It includes a base bracket, a back rotating bracket, a V-shaped fixing seat, and an annular elastic sheet; the back rotating bracket is symmetrically connected to the left and right sides of the base bracket, the two back rotating brackets are rotatably arranged on the base bracket, and the two back rotating brackets are provided with mounting parts for installing back cushions; the V-shaped fixing seats are rotatably arranged on both sides of the base bracket, the bottom of the annular elastic sheet is provided with an opening, the two ends of the opening of the annular elastic sheet are respectively connected to the front and rear ends of the base bracket, and the top surface of the annular elastic sheet and the top surfaces of the two V-shaped fixing seats together form a mounting surface for installing a seat cushion.

2. The seat reclining mechanism according to claim 1, characterized in that: Rotation convex shafts are symmetrically arranged on both sides of the base bracket, and the two back rotation brackets are rotatably arranged on the rotation convex shafts on both sides of the base bracket.

3. The seat reclining mechanism according to claim 2, characterized in that: L-shaped limit pieces are extended outward on both sides of the base bracket respectively, and a rotating boss is arranged on the inner side of the upper end of the L-shaped limit piece. The back rotating bracket comprises a rotating arm and a mounting arm. The rotating arm is rotatably arranged on the rotating cam shaft and the rotating boss. The front end of the mounting arm is integrally connected with the upper end of the rotating arm, and the rear end of the mounting arm extends toward the rear end of the base bracket, and a mounting plate is integrally formed with the rear end of the mounting arm, and the front end surfaces of the mounting plates on the two mounting arms jointly form the mounting portion.

4. The seat reclining mechanism according to claim 3, characterized in that: The rotating arm is provided with a first set of holes and a second set of holes respectively. The first set of holes is movably sleeved on the rotating convex shaft, and the second set of holes is movably sleeved on the rotating convex column.

5. The seat reclining mechanism according to claim 3, characterized in that: The front end surfaces of the mounting plates on the two mounting arms are respectively penetrated with first mounting holes.

6. The seat reclining mechanism according to claim 1, characterized in that: The lower ends of the two back rotating brackets are respectively provided with round shafts, the middle bottoms of the two V-shaped fixing seats are respectively provided with fixing sleeves, and the two V-shaped fixing seats are respectively fixedly sleeved on the round shafts of the two back rotating brackets through their own fixing sleeves.

7. The seat reclining mechanism according to claim 6, characterized in that: The top surfaces of the two V-shaped fixing seats and the top surface of the annular elastic sheet are both located in the same plane, the top surfaces of the two V-shaped fixing seats are penetrated with a second mounting hole, and the top surface of the annular elastic sheet is penetrated with a third mounting hole.

8. A seat, characterized in that: It comprises a seat reclining mechanism as claimed in any one of claims 1 to 7.

Images