A mechanism for synchronously adjusting seat cushion inclination and seat back

Abstract

The present invention discloses a mechanism for synchronously adjusting the inclination angle of a seat cushion and a seat backrest, comprising a seat cushion and a backrest, and also comprising an upper connecting plate of the backrest, a linkage assembly, a seat cushion adjustment assembly, a pair of angle adjusters and a pair of lower connecting plates of the backrest; the lower parts of both sides of the backrest curved pipe are respectively connected to the right and left upper connecting plates of the backrest, the right and left upper connecting plates of the backrest are respectively rotatably connected to the right and left lower connecting plates of the backrest through the right and left angle adjusters, the bottoms of the right and left lower connecting plates of the backrest are connected to the seat cushion frame, the seat cushion adjustment assembly is connected to the bottom horizontal pipe of the backrest curved pipe through the linkage assembly, and when the backrest is flipped backward, the seat cushion adjustment assembly is driven to link with the linkage assembly to realize the change of the seat inclination angle. The present invention has a compact structure and a reasonable layout, does not require a seat cushion motor, realizes synchronous adjustment of the seat back and seat cushion inclination angle through a set of connecting rod mechanisms, saves a seat cushion inclination angle adjustment motor, reduces weight, and reduces costs.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a mechanism for synchronously adjusting the inclination of a seat cushion and a seat back. Background Art

[0002] With the development of the automobile industry, car seats can achieve more and more functions, and people spend more and more time in the car, so the comfort requirements of seats are getting higher and higher. When people rest in the car, they are used to folding the seat back and lying on the seat. However, when the seat back is folded back on the market, there is a height difference with the seat cushion, and the waist of the person lying on the seat is empty and uncomfortable.

[0003] like Figure 1 As shown, it is a schematic diagram of a seat frame of the prior art, in which both sides of the bottom of the backrest bend 2 are welded between the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b; the bottoms of the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b are welded to the right recliner 9a and the left recliner 9b; the right recliner 9a and the left recliner 9b are welded to the right backrest lower connecting plate 10a and the left backrest lower connecting plate 10b; the cushion bend 7 is welded between the right backrest lower connecting plate 10a and the left backrest lower connecting plate 10b. During adjustment, the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b are driven by a motor or manually, and the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b rotate around the rotation center of the recliner to realize the function of adjusting the backrest backward. During the process of adjusting the backrest backward, since there is no linkage mechanism between the seat cushion and the backrest, the inclination angle of the seat cushion does not change, and the synchronous linkage function between the backrest and the seat cushion cannot be realized. Figure 2 As shown, after the backrest is rotated backward, there is a height difference with the seat cushion after leveling, and the comfort is poor.

[0004] Therefore, the present invention proposes an adjustment mechanism for the seat cushion and the backrest in linkage, so that when the backrest is folded backward, the seat cushion is lifted synchronously, thereby eliminating the height difference between the seat cushion and the backrest and increasing the comfort of the passenger lying flat. Summary of the invention

[0005] The purpose of the present invention is to provide a mechanism for synchronously adjusting the inclination of a seat cushion and a seat back, so as to solve the problem in the prior art that when the seat back is laid flat, there is a height difference between the seat and the seat, resulting in poor comfort for passengers lying flat.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention discloses a mechanism for synchronously adjusting the inclination angle of a seat cushion and a seat back, comprising an adjustable seat cushion mounted on a seat cushion frame and a backrest above the rear side of the seat cushion, wherein the backrest is mounted on a backrest bent pipe, and further comprising a pair of backrest upper connecting plates, a linkage assembly, a seat cushion adjustment assembly, a pair of angle adjusters, and a pair of backrest lower connecting plates; the backrest upper connecting plates comprise a right backrest upper connecting plate and a left backrest upper connecting plate, the angle adjusters comprise a right angle adjuster and a left angle adjuster, the backrest lower connecting plates comprise a right backrest lower connecting plate and a left backrest lower connecting plate, and the lower portions of both sides of the backrest bent pipe are respectively connected to The seat cushion adjusting assembly is connected to the right upper connecting plate and the left upper connecting plate of the backrest, and the right upper connecting plate and the left upper connecting plate of the backrest are rotatably connected to the right lower connecting plate and the left lower connecting plate of the backrest through the right angle adjuster and the left angle adjuster respectively, and the bottoms of the right lower connecting plate and the left lower connecting plate of the backrest are connected to the seat cushion frame; the seat cushion adjustment assembly is connected to the bottom horizontal tube of the backrest bent pipe through a linkage assembly, and when the backrest is flipped backward, the linkage assembly drives the seat cushion adjustment assembly to realize the change of the seat inclination angle.

[0008] Preferably, the linkage assembly includes a pair of upper linkage plates, a linkage tube and a pair of lower linkage plates, the upper linkage plates include an upper right linkage plate and an upper left linkage plate, the lower linkage plates include a lower right linkage plate and a lower left linkage plate, one end of the upper right linkage plate and the upper left linkage plate are hinged on the bottom horizontal tube of the backrest bent tube, the other end of the upper right linkage plate and the upper left linkage plate are positioned and connected to the linkage tube, one end of the lower right linkage plate and the lower left linkage plate are positioned and connected to the linkage tube, and the other end of the lower right linkage plate and the lower left linkage plate are slidably connected to the seat cushion adjustment assembly.

[0009] Preferably, the seat cushion adjustment assembly includes a supporting seat cushion bend tube and a seat cushion slide plate, the seat cushion bend tube is connected to the seat cushion frame via a seat cushion bend tube bracket on the side away from the backrest, and the seat cushion bend tube is connected to the right lower linkage plate and the left lower linkage plate on the side close to the backrest via the seat cushion slide plate.

[0010] Preferably, the seat cushion bent tube bracket comprises a right seat cushion bent tube bracket and a left seat cushion bent tube bracket which are symmetrically arranged, the bottoms of the right seat cushion bent tube bracket and the left seat cushion bent tube bracket are connected to the seat cushion frame by welding or bolts, the tops of the right seat cushion bent tube bracket and the left seat cushion bent tube bracket are provided with circular through holes, the seat cushion bent tube is connected through the circular through holes, and the seat cushion bent tube rotates about the axis of the circular through hole as the rotation axis.

[0011] Preferably, the seat cushion bent tube is welded to the seat cushion slide plate on one side close to the backrest, waist-shaped holes are provided on both sides of the seat cushion slide plate, the bottoms of the right lower linkage plate and the left lower linkage plate are riveted in the waist-shaped holes through pins, and when the backrest is flipped over, the pins slide along the waist-shaped holes and drive the seat cushion bent tube to rotate to generate linkage.

[0012] Preferably, the opposite sides of the right and left angle adjusters are welded to the right and left backrest upper connecting plates, and the opposite back sides of the right and left angle adjusters are welded to the right and left backrest lower connecting plates.

[0013] Preferably, the lower parts of the vertical tubes on both sides of the backrest bent tube are welded or connected to the tops of the right backrest upper connecting plate and the left backrest upper connecting plate by screw positioning.

[0014] A seat with a seat cushion inclination angle that is synchronously adjusted with a seat backrest adopts the seat cushion inclination angle and seat back synchronous adjustment mechanism as described above.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are:

[0016] The invention discloses a mechanism for synchronously adjusting the inclination angle of a seat cushion and a seat backrest, comprising an adjustable seat cushion installed on a seat cushion frame and a backrest above the rear side of the seat cushion, and also comprising a pair of upper connecting plates on the backrest, a linkage assembly, a seat cushion adjustment assembly, a pair of angle adjusters and a pair of lower connecting plates on the backrest; the upper connecting plate on the backrest, the angle adjuster and the lower connecting plate on the backrest form an outer rotation positioning mechanism to realize the erection and flipping and flattening operation of the backrest; wherein the linkage assembly comprises a pair of upper linkage pieces, a linkage pipe and a pair of lower linkage pieces, a new seat cushion adjustment assembly is added, the assembly comprises a seat cushion curved pipe and a seat cushion slide plate for support, the linkage assembly is installed in the middle position, and is cleverly slidably connected with the seat cushion slide plate through the lower linkage piece, the seat cushion adjustment assembly is connected with the bottom horizontal pipe of the backrest curved pipe through the linkage assembly, and when the backrest flips backward, the seat cushion adjustment assembly is driven by the linkage assembly to realize the change of the inclination angle of the seat. Compared with the existing seat back cushion adjustment mechanism, the invention can realize the linkage adjustment of the seat cushion and the backrest, eliminate the height difference between the seat cushion and the backrest after the backrest is flattened, and improve the riding comfort. The present invention aims at the usage habits of seats in different scenarios. During normal driving, the backrest needs to be adjusted to an upright state, and the seat cushion has a certain inclination angle with the horizontal to ensure that the driver can be fixed on the seat and drive normally. When the car is parked and the driver takes a rest, the seat backrest is laid flat backwards, and the inclination angle of the seat cushion can be adjusted synchronously to reduce the inclination angle of the seat cushion, eliminate the step difference between the seat cushion and the backrest, and improve comfort.

[0017] In general, the present invention has a compact structure and a reasonable layout. It does not require a seat cushion motor. By adding a set of connecting rod mechanisms between the seat cushion and the backrest, the seat back and seat cushion inclination angles can be adjusted synchronously, saving a seat cushion inclination adjustment motor, reducing weight, reducing costs, and increasing the installation space for other functional mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of a seat frame in the prior art;

[0020] Figure 2 It is a schematic diagram of the leveling state of the seat frame in the prior art;

[0021] Figure 3 It is a schematic diagram of the seat cushion inclination and seat back synchronous adjustment mechanism of the present invention;

[0022] Figure 4 An exploded view of the seat cushion inclination and seat back synchronous adjustment mechanism of the present invention;

[0023] Figure 5 This is a front view of the seat cushion inclination and seat back synchronous adjustment mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the seat backrest of the present invention in a flat position;

[0025] Explanation of the reference numerals in the accompanying drawings: 1a, right upper connecting plate of backrest; 1b, left upper connecting plate of backrest; 2, backrest bent pipe; 3a, right upper linkage plate; 3b, left upper linkage plate; 4, linkage pipe; 5a, right lower linkage plate; 5b, left lower linkage plate; 6, seat cushion slide plate; 7, seat cushion bent pipe; 8a, right seat cushion bent pipe bracket; 8b, left seat cushion bent pipe bracket; 9a, right angle adjuster; 9b, left angle adjuster; 10a, right backrest lower connecting plate; 10b, left backrest lower connecting plate; 11, seat cushion frame. DETAILED DESCRIPTION

[0026] like Figure 2-6 As shown, a seat cushion inclination and seat back synchronous adjustment mechanism comprises an adjustable seat cushion mounted on a seat cushion frame 11 and a backrest above the rear side of the seat cushion, the backrest being mounted on a backrest curved pipe 2, and further comprising a pair of backrest upper connecting plates, a linkage assembly, a seat cushion adjustment assembly, a pair of angle adjusters and a pair of backrest lower connecting plates;

[0027] Specifically, the upper connecting plate of the backrest includes a right upper connecting plate 1a and a left upper connecting plate 1b, the adjuster includes a right adjuster 9a and a left adjuster 9b, the lower connecting plate of the backrest includes a right lower connecting plate 10a and a left lower connecting plate 10b, the lower parts of both sides of the backrest bent pipe 2 are respectively connected to the right upper connecting plate 1a and the left upper connecting plate 1b, the right upper connecting plate 1a and the left upper connecting plate 1b are respectively rotatably connected to the right lower connecting plate 10a and the left lower connecting plate 10b through the right adjuster 9a and the left adjuster 9b, the bottoms of the right lower connecting plate 10a and the left lower connecting plate 10b are connected to the cushion frame 11; the cushion adjustment component is connected to the bottom horizontal tube of the backrest bent pipe 2 through a linkage component, and when the backrest is flipped backward, the seat cushion adjustment component is driven by the linkage component to realize the change of the seat inclination angle.

[0028] Specifically, the linkage assembly includes a pair of upper linkage plates, a linkage tube 4 and a pair of lower linkage plates, the upper linkage plates include an upper right linkage plate 3a and an upper left linkage plate 3b, the lower linkage plates include a lower right linkage plate 5a and a lower left linkage plate 5b, one end of the upper right linkage plate 3a and the upper left linkage plate 3b are hinged on the bottom horizontal tube of the backrest bent tube 2, the other end of the upper right linkage plate 3a and the upper left linkage plate 3b are positioned and connected to the linkage tube 4, one end of the lower right linkage plate 5a and the lower left linkage plate 5b are positioned and connected to the linkage tube 4, and the other end of the lower right linkage plate 5a and the lower left linkage plate 5b are slidably connected to the seat cushion adjustment assembly.

[0029] Specifically, the seat cushion adjustment assembly includes a supporting seat cushion bend tube 7 and a seat cushion slide plate 6. The seat cushion bend tube 7 is connected to the seat cushion frame 11 through a seat cushion bend tube bracket on the side away from the backrest, and the seat cushion bend tube 7 is connected to the right lower linkage plate 5a and the left lower linkage plate 5b on the side close to the backrest through the seat cushion slide plate 6.

[0030] Specifically, Figure 3 , 4As shown, the cushion bend bracket includes a right cushion bend bracket 8a and a left cushion bend bracket 8b which are symmetrically arranged. The right cushion bend bracket 8a and the left cushion bend bracket 8b are specifically designed to be L-shaped. The bottoms of the right cushion bend bracket 8a and the left cushion bend bracket 8b are connected to the cushion frame 11 by welding or bolts. The tops of the right cushion bend bracket 8a and the left cushion bend bracket 8b are provided with circular through holes. The cushion bend 7 is connected through the circular through holes, and the cushion bend 7 rotates with the axis of the circular through holes as the rotation axis. The cushion bend 7 is welded to the cushion slide plate 6 near the backrest. The two sides of the cushion slide plate 6 are provided with waist-shaped holes. The bottoms of the right lower linkage piece 5a and the left lower linkage piece 5b are riveted in the waist-shaped holes by pins. When the backrest is flipped, the pins slide along the waist-shaped holes and drive the cushion bend 7 to rotate to generate linkage.

[0031] Specifically, one side of the opposite surface of the right recliner 9a and the left recliner 9b is welded to the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b, and the opposite side of the right recliner 9a and the left recliner 9b is welded to the right backrest lower connecting plate 10a and the left backrest lower connecting plate 10b. The lower part of the vertical tubes on both sides of the backrest bend 2 is welded or fixedly connected to the top of the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b by screws. When rotating, the backrest bend 2, the right backrest upper connecting plate 1a and the left backrest upper connecting plate 1b are flipped backwards as a whole with the right recliner 9a and the left recliner 9b as the center.

[0032] A seat with a seat cushion inclination angle that is synchronously adjusted with a seat backrest adopts the seat cushion inclination angle and seat back synchronous adjustment mechanism as described above.

[0033] The action process of the present invention is as follows:

[0034] like Figure 5 As shown, the seat back is in an upright state, which is mainly used in normal driving. At this time, the seat cushion has a certain inclination angle with the horizontal to ensure that the driver can be fixed on the seat and drive normally; in this state, the linkage assembly composed of the upper linkage plate, the linkage tube 4 and the lower linkage plate is in an upright state, and the pins at the bottom of the lower right linkage plate 5a and the lower left linkage plate 5b are located at the rearmost side of the waist-shaped hole on the seat cushion slide plate 6, the front end height of the seat cushion bent tube 7 is at the highest point, and the inclination angle of the seat cushion is the largest, so that the passenger can experience a more comfortable position.

[0035] like Figure 6When the backrest is flattened, the backrest bent tube 2 drives the upper linkage plate, the linkage tube 4 and the lower linkage plate to rotate clockwise, and the bottom pin shaft of the lower linkage plate slides forward in the seat cushion slide groove 6, pushing the seat cushion slide groove 6 and the welded seat cushion bent tube 7 to rotate around the right seat cushion bent tube bracket 8a and the left seat cushion bent tube bracket 8b, so that the inclination angle of the seat cushion bent tube 7 changes from steep to slow. When the backrest is adjusted to a horizontal position, the inclination angle of the seat cushion is also horizontal and flush with the backrest. There is no step difference in the seat-back joint position. When the backrest is flattened, the pin shafts at the bottom of the right lower linkage plate 5a and the left lower linkage plate 5b are located in the middle position of the waist-shaped holes on the seat cushion slide groove plate 6.

[0036] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A mechanism for synchronously adjusting the seat cushion inclination and the seat back, comprising an adjustable seat cushion mounted on a seat cushion frame and a backrest above the rear side of the seat cushion, wherein the backrest is mounted on a backrest bent pipe, characterized in that: It also includes a pair of upper backrest connecting plates, a linkage assembly, a cushion adjustment assembly, a pair of angle adjusters and a pair of lower backrest connecting plates; The backrest upper connecting plate includes a right backrest upper connecting plate and a left backrest upper connecting plate, the angle adjuster includes a right angle adjuster and a left angle adjuster, the backrest lower connecting plate includes a right backrest lower connecting plate and a left backrest lower connecting plate, the lower parts of both sides of the backrest curved pipe are respectively connected to the right backrest upper connecting plate and the left backrest upper connecting plate, the right backrest upper connecting plate and the left backrest upper connecting plate are rotatably connected to the right backrest lower connecting plate and the left backrest lower connecting plate through the right angle adjuster and the left angle adjuster respectively, and the bottoms of the right backrest lower connecting plate and the left backrest lower connecting plate are connected to the cushion frame; The seat cushion adjustment component is connected to the bottom horizontal tube of the backrest bent tube through a linkage component, and when the backrest is flipped backward, the seat cushion adjustment component is driven by the linkage component to realize the change of the seat inclination angle; The linkage assembly comprises a pair of upper linkage pieces, a linkage tube and a pair of lower linkage pieces, the upper linkage pieces comprise a right upper linkage piece and a left upper linkage piece, the lower linkage pieces comprise a right lower linkage piece and a left lower linkage piece, one end of the right upper linkage piece and the left upper linkage piece are hinged on the bottom horizontal tube of the backrest curved tube, the other end of the right upper linkage piece and the left upper linkage piece are positioned and connected to the linkage tube, one end of the right lower linkage piece and the left lower linkage piece are positioned and connected to the linkage tube, and the other end of the right lower linkage piece and the left lower linkage piece are slidably connected to the cushion adjustment assembly; The opposite sides of the right and left angle adjusters are welded to the right and left backrest upper connecting plates, and the opposite back sides of the right and left angle adjusters are welded to the right and left backrest lower connecting plates.

2. The seat cushion inclination and seat back synchronous adjustment mechanism according to claim 1, characterized in that: The seat cushion adjustment assembly includes a supporting seat cushion bend tube and a seat cushion slide plate. The seat cushion bend tube is connected to the seat cushion frame via a seat cushion bend tube bracket on the side away from the backrest, and the seat cushion bend tube is connected to the right lower linkage plate and the left lower linkage plate on the side close to the backrest via the seat cushion slide plate.

3. The seat cushion inclination and seat back synchronous adjustment mechanism according to claim 2, characterized in that: The seat cushion bent tube bracket includes a right seat cushion bent tube bracket and a left seat cushion bent tube bracket which are symmetrically arranged, the bottoms of the right seat cushion bent tube bracket and the left seat cushion bent tube bracket are connected to the seat cushion frame by welding or bolts, the tops of the right seat cushion bent tube bracket and the left seat cushion bent tube bracket are provided with circular through holes, the seat cushion bent tube is connected through the circular through holes, and the seat cushion bent tube rotates with the axis of the circular through hole as the rotation axis.

4. The seat cushion inclination and seat back synchronous adjustment mechanism according to claim 2, characterized in that: The seat cushion bent tube is welded to the seat cushion slide plate on one side close to the backrest, and waist-shaped holes are provided on both sides of the seat cushion slide plate. The bottoms of the lower right linkage plate and the lower left linkage plate are riveted in the waist-shaped holes through pins, and when the backrest is flipped over, the pins slide along the waist-shaped holes and drive the seat cushion bent tube to rotate to generate linkage.

5. The seat cushion inclination and seat back synchronous adjustment mechanism according to claim 1, characterized in that: The lower parts of the vertical tubes on both sides of the backrest bent tube are welded or positioned and connected to the tops of the right backrest upper connecting plate and the left backrest upper connecting plate by screws.

6. A seat with a seat cushion inclination angle that is adjusted synchronously with a seat back, characterized in that: A seat cushion inclination and seat back synchronous adjustment mechanism as described in any one of claims 1 to 5 is adopted.

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