CN216534566U

CN216534566U - Height difference adjusting mechanism of backrest and cushion convenient for seat to lie flat

Info

Publication number: CN216534566U
Application number: CN202123126565.9U
Authority: CN
Inventors: 朱勋; 刘魏; 左家乐; 陈国刚; 薛磊
Original assignee: Magna Seating Research and Development Chongqing Co Ltd
Current assignee: Magna Seating Research and Development Chongqing Co Ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-05-17
Anticipated expiration: 2031-12-13

Abstract

The utility model discloses a height difference adjusting mechanism of a backrest and a cushion, which is convenient for a seat to lie flat, wherein the upper end of a first connecting piece is fixedly connected with a backrest side plate, a second connecting piece extends forwards and is fixedly connected with a seat frame, the lower end of the first connecting piece is connected with the rear end of the second connecting piece through a first hinge point, a seat frame front end angle adjusting mechanism is arranged on the inner side of the front end of the seat frame side plate, the seat frame can integrally rotate around the front end to realize angle adjustment, and the bottom of the front end of the seat frame is hinged with the upper end of the seat frame front end angle adjusting mechanism through a sliding pair; when the backrest rotates backwards, the backrest side plate drives the first hinge point to move upwards through the first connecting piece, so that the rear end of the seat frame moves upwards along with the first hinge point, the front end of the seat frame can rotate and move forwards and backwards at the hinge position of the sliding pair, and the problems that the step difference exists at the joint of the seat cushion and the backrest and the inclination angle of the seat cushion can not reach the horizontal angle under the lying posture of the seat are solved.

Description

Height difference adjusting mechanism of backrest and cushion convenient for seat to lie flat

Technical Field

The utility model belongs to the technical field of automobile seat structures, and particularly relates to a lifting mechanism of a seat cushion.

Background

The national intellectual property office published patent application "mechanism for a recumbent motor vehicle seat assembly" in 2018, 9, 14 (CN201810161190.3), which is a local lifting mechanism at the rear end of a seat cushion, the seat cushion is divided into a front part and a rear part, and the two parts are connected by hinges. When the seat is laid flat, firstly, when the lifting height of the rear part of the cushion is larger, a V-shaped concave pit is formed in the middle area of the cushion; secondly, the back part of the cushion is lifted, the rotating center of the mechanism is positioned in the middle of the cushion, the rotating radius of the mechanism is smaller, the lifting height of the back end of the cushion is limited, and the purpose of compensating the height difference between the cushion and the back after the back is laid down is difficult to meet; and thirdly, the cushion can not be integrated with the cushion front end adjusting mechanism, so that after the rear part of the cushion is lifted, the actual angle of the cushion is greatly different from the angle requirement (horizontal angle) of the required lying posture, and the inclination angle of the whole cushion can not be adjusted by the cushion front end angle adjusting mechanism to eliminate the difference.

Another patent application, a partial lifting mechanism for a seat frame of a vehicle seat (CN202111085923.8), is published at 11/05/2021, and is also a partial lifting mechanism for a rear end of a seat cushion, and the same problem occurs when the seat is laid flat.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the joint of a cushion and a backrest has a step difference and the inclination angle of the cushion can not reach the horizontal angle in the lying posture (the backrest is laid flat backwards).

Therefore, the technical scheme adopted by the utility model is as follows: a height difference adjusting mechanism for a backrest and a cushion convenient for a seat to lie flat comprises a seat frame, a seat frame side plate, a backrest side plate, a first connecting piece and a second connecting piece, wherein the upper end of the first connecting piece is fixedly connected with the backrest side plate, the second connecting piece extends forwards and is fixedly connected with the seat frame, the lower end of the first connecting piece is connected with the rear end of the second connecting piece through a first hinge point, the first connecting piece is a stamping sheet metal part, and the backrest side plate is connected with the first connecting piece in a welding mode; the second connecting piece comprises a seat frame supporting piece and a seat basin connecting support, the seat frame supporting piece and the seat basin connecting support are both stamping sheet metal parts, the seat basin connecting support is fixed on the seat frame through bolts, the front part of the seat frame supporting piece is connected with the seat basin connecting support in a welding mode, and the middle rear part of the seat frame supporting piece is connected with the cushion suspension spring hanging plate in a welding mode; the inner side of the front end of the seat frame side plate is provided with a seat frame front end angle adjusting mechanism which can realize that the seat frame integrally rotates around the front end to realize angle adjustment, and the bottom of the front end of the seat frame is hinged with the upper end of the seat frame front end angle adjusting mechanism through a sliding pair; when the backrest rotates backwards around the second hinge point relative to the seat frame, the backrest side plate drives the first hinge point to move upwards through the first connecting piece, so that the rear end of the seat frame moves upwards along with the first hinge point, and the front end of the seat frame can rotate and move forwards and backwards at the hinge position of the sliding pair.

Preferably, the seat frame front end angle adjusting mechanism comprises a seat frame front end angle adjusting motor, a screw rod and nut mechanism and a seat frame front end angle adjusting connecting rod, the angle adjusting motor at the front end of the seat frame is rotatably arranged on the inner side of the front part of the side plate of the seat frame through a first rotating pair, the angle adjusting motor at the front end of the seat frame can drive the nut of the feed screw nut mechanism to rotate, the angle adjusting mechanism comprises a screw rod, a screw nut mechanism, a seat frame side plate, a seat frame front end angle adjusting connecting rod, a sliding pair and a sliding pair, wherein the screw rod drives the screw rod to move back and forth, the front end of the screw rod of the screw nut mechanism is connected with the lower end of the seat frame front end angle adjusting connecting rod through a third hinge joint, the upper end of the seat frame front end angle adjusting connecting rod is bent backwards and integrally to be L-shaped, the corner of the seat frame front end angle adjusting connecting rod is hinged with the bottom of the front end of the seat frame through the sliding pair, and the upper end of the seat frame front end angle adjusting connecting rod and the seat frame side plate are rotatably installed on the inner side of the front portion of the seat frame side plate through a fourth hinge joint. The seat frame integrally rotates around the front end to realize angle adjustment through the motor and the screw rod nut mechanism, and the seat frame is compact in structure, small in occupied space and easy to arrange.

Preferably, the bottom of the front end of the seat frame is provided with a seat frame sliding block, a sliding groove extending forwards and backwards is formed in the seat frame sliding block, the angle adjusting connecting rods at the front ends of the seat frames on the left side and the right side are connected through a front rotating shaft, and the front rotating shaft is inserted into the sliding groove to form a sliding pair hinge.

Further preferably, when the backrest rotates backwards around the second hinge point relative to the seat frame and is flatly placed, the rear end of the seat frame can be lifted upwards by a height of 50 mm-150 mm. The rear end lifting height of the utility model can be according to the actual demand, has an elastic space of 50 mm-150 mm, and can meet the lying demand of the seat on the market at present.

In order to simplify the structure and facilitate the manufacture and the installation and the arrangement, the whole connecting bracket of the sitting basin is in a long strip shape and is divided into a front section and a rear section, the front section is flush with the sitting frame, the rear section is bent upwards relative to the front section, and the suspension spring hanging plate of the cushion is connected with the rear section in a welding way.

The utility model has the beneficial effects that:

(1) the traditional thinking that the seat frame is divided into a front part and a rear part and the rear end is lifted to eliminate the step difference through relative rotation is abandoned; the seat frame integral structure is adopted, and the problem of poor step at the joint of the seat cushion and the backrest in the lying posture is solved.

(2) The angle adjusting mechanism at the front end of the seat frame is combined, so that the problem that the inclination angle of the seat cushion reaches the horizontal angle under the lying posture is solved.

(3) Cushion rear end lifting and front end inclination are adjusted and are fused mutually, both can independently adjust, can realize coordinating the regulation each other again, promote the passenger and take experience.

(4) The whole structure occupies small space, can be modified on the prior seat, and has low manufacturing and development cost.

Drawings

Fig. 1 is a first usage state diagram (before the backrest is laid flat) of the present invention.

Fig. 2 is a second usage state of the present invention (with the backrest flat).

Fig. 3 is a mechanical movement diagram of the present invention.

Detailed Description

The utility model will be further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1-3, a height difference adjusting mechanism for a backrest and a cushion of a chair convenient to lie flat mainly comprises a seat frame 1, a seat frame side plate 2, a backrest side plate 3, a first connecting piece 4, a second connecting piece 5, a seat frame sliding block 6, a front rotary shaft 7, a cushion suspension spring connection plate 8, a seat frame front end angle adjusting motor 9, a screw rod nut mechanism 10 and a seat frame front end angle adjusting connecting rod 11.

The seat frame 1, the seat frame side plate 2, the backrest side plate 3 and the cushion suspension spring hanging plate 8 are original parts on the automobile seat. Sit frame 1 and adopt integral frame construction, sit frame curb plate 2 and be located and sit the frame 1 and control the outside, back curb plate 3 is located the back and controls the outside, and the back is articulated through second pin joint B with sitting frame 1, can realize backward rotation and set level. The cushion suspension spring attachment plate 8 is used to mount the cushion suspension springs 12. The above description is prior art and is not repeated herein.

The problem of step difference at the joint of the cushion and the backrest when the backrest is turned over and laid flat is solved; meanwhile, the backrest is turned over and laid flat and the angle adjustment of the front end of the whole cushion is well integrated, so that the actual angle of the lifted cushion can reach the horizontal angle required by the lying posture. Also adds: the first connecting piece 4, the second connecting piece 5 and the seat frame front end angle adjusting mechanism.

The upper end of the first connecting piece 4 is fixedly connected with the backrest side plate 3, the second connecting piece 5 extends forwards and then is fixedly connected with the seat frame 1, and the lower end of the first connecting piece 4 is connected with the rear end of the second connecting piece 5 through a first hinge point A. The inner side of the front end of the seat frame side plate 2 is provided with a seat frame front end angle adjusting mechanism, so that the seat frame can integrally rotate around the front end to realize angle adjustment. The bottom of the front end of the seat frame 1 is hinged with the upper end of the angle adjusting mechanism of the front end of the seat frame through a sliding pair D.

When the back sits frame 1 and rotates backward around second pin joint B relatively, back curb plate 3 drives first pin joint A through first connecting piece 4 and up moves to make and sit 1 rear end of frame and up move along with first pin joint A, sit 1 front end of frame and can rotate and can the back-and-forth movement in the vice D articulated position department of sliding.

Seat frame front end angle accommodate motor 9 rotationally installs at the anterior inboard of seat frame curb plate 2 through first revolute pair F, and concrete mounting structure is: the seat frame front end angle adjusting motor 9 is rotatably installed on the motor installing support through a fifth hinge point F, the motor installing support is fixedly installed on the seat frame side plate 2, and the motor installing support is used for realizing the rotatable connection of the seat frame front end angle adjusting motor 9 on the seat frame side plate 2. The seat frame front end angle adjusting motor 9 can drive the nut of the screw rod nut mechanism 10 to rotate so as to drive the screw rod of the screw rod nut mechanism 10 to move back and forth, the front end of the screw rod nut mechanism 10 is connected with the lower end of the seat frame front end angle adjusting connecting rod 11 through a third hinged point C, and the rear end of the screw rod nut mechanism 10 is suspended. The upper end of the seat frame front end angle adjusting connecting rod 11 is bent backwards to be integrally L-shaped, the corner of the seat frame front end angle adjusting connecting rod 11 is hinged to the bottom of the front end of the seat frame 1 through a sliding pair D, and the upper end of the seat frame front end angle adjusting connecting rod 11 and the seat frame side plate 2 are rotatably installed on the inner side of the front portion of the seat frame side plate 2 through a fourth hinge point E.

Preferably, the seat frame slider 6 is provided at the bottom of the front end of the seat frame 1, and a sliding groove 6a extending forward and backward is formed in the seat frame slider 6. The angle adjusting connecting rods 11 at the front ends of the seat frames on the left side and the right side are connected through a front rotating shaft 7, and the front rotating shaft 7 is made of a circular tube. The front rotating shaft 7 is inserted in the sliding groove 6a to form a sliding pair D hinged. Of course, the specific structure of the sliding pair hinge joint may be that the seat frame sliding block with the sliding groove is arranged at the upper end of the seat frame front end angle adjusting connecting rod, and the rotating shaft is designed at the bottom of the seat frame front end, which is not limited to this.

When the backrest rotates backwards around the second hinge point B relative to the seat frame 1 and is laid flat, the rear end of the seat frame 1 can be lifted upwards by 50-150 mm.

Preferably, the second link 5 is composed of a seat frame support 5a and a bowl connecting bracket 5 b. The seat frame supporting piece 5a and the seat basin connecting support 5b are stamping sheet metal parts, and the seat basin connecting support 5b is fixed on the seat frame 1 through bolts or welded. The front part of the seat frame supporting piece 5a is connected with the seat basin connecting bracket 5b in a welding way, and the middle rear part of the seat frame supporting piece 5a is connected with the cushion suspension spring hanging plate 8 in a welding way, also can be connected by bolts, and is not limited by the above.

For reducing occupation space, sit basin linking bridge 5b and wholly be rectangular form, divide into two sections around, the anterior segment flushes with sitting frame 1, and the relative anterior segment of back end is upwards bent, and cushion suspension spring fishplate bar 8 links to each other with the back end welding.

The first connecting piece 4 is a stamping sheet metal part, and the backrest side plate 3 is connected with the first connecting piece 4 in a welding mode, so that the processing and the manufacturing are convenient. The first connecting piece 4, the seat frame supporting piece 5a, the seat basin connecting bracket 5b, the seat frame side plate 2 and the backrest side plate 3 are respectively punched with a reinforcing flange; reinforcing ribs are punched in the seat frame side plate 2 and the backrest side plate 3. The angle adjusting connecting rod 11 at the front end of the seat frame is also a sheet metal part, is wide at the top and narrow at the bottom, and is provided with an arc-shaped notch at the top end and welded on the front rotating shaft 7 through the arc-shaped notch.

Claims

1. The utility model provides a difference in height adjustment mechanism of back and cushion convenient to seat lies flat, includes sits frame (1), sits frame curb plate (2) and back curb plate (3), its characterized in that: the seat is characterized by further comprising a first connecting piece (4) and a second connecting piece (5), wherein the upper end of the first connecting piece (4) is fixedly connected with the backrest side plate (3), the second connecting piece (5) extends forwards and then is fixedly connected with the seat frame (1), the lower end of the first connecting piece (4) is connected with the rear end of the second connecting piece (5) through a first hinge point (A), the first connecting piece (4) is a stamping sheet metal part, and the backrest side plate (3) is connected with the first connecting piece (4) in a welding mode; the second connecting piece (5) comprises a seat frame supporting piece (5a) and a seat basin connecting support (5b), the seat frame supporting piece (5a) and the seat basin connecting support (5b) are both stamping sheet metal parts, the seat basin connecting support (5b) is fixed on the seat frame (1) through bolts, the front part of the seat frame supporting piece (5a) is connected with the seat basin connecting support (5b) in a welding mode, and the middle rear part of the seat frame supporting piece (5a) is connected with the cushion suspension spring hanging plate (8) in a welding mode; the inner side of the front end of the seat frame side plate (2) is provided with a seat frame front end angle adjusting mechanism which can realize that the whole seat frame rotates around the front end to realize angle adjustment, and the bottom of the front end of the seat frame (1) is hinged with the upper end of the seat frame front end angle adjusting mechanism through a sliding pair (D); when the backrest is relatively seated on the frame (1) and rotates backwards around the second hinge point (B), the backrest side plate (3) drives the first hinge point (A) to move upwards through the first connecting piece (4), so that the rear end of the seat frame (1) moves upwards along with the first hinge point (A), and the front end of the seat frame (1) can rotate and move forwards and backwards at the hinge position of the sliding pair (D).

2. The mechanism for adjusting the difference in height between a back and a seat cushion for facilitating the reclining of a seat according to claim 1, wherein: the seat frame front end angle adjusting mechanism comprises a seat frame front end angle adjusting motor (9), a screw rod nut mechanism (10) and a seat frame front end angle adjusting connecting rod (11), wherein the seat frame front end angle adjusting motor (9) is rotatably arranged on the inner side of the front part of a seat frame side plate (2) through a first rotating pair (F), the seat frame front end angle adjusting motor (9) can drive a nut of the screw rod nut mechanism (10) to rotate so as to drive a screw rod of the screw rod nut mechanism (10) to move back and forth, the front end of a screw rod of the screw rod nut mechanism (10) is connected with the lower end of the seat frame front end angle adjusting connecting rod (11) through a third hinge point (C), the upper end of the seat frame front end angle adjusting connecting rod (11) is bent backwards to be integrally L-shaped, the corner of the seat frame front end angle adjusting connecting rod (11) is hinged with the front end bottom of the seat frame (1) through a sliding pair (D), the upper end of the seat frame front end angle adjusting connecting rod (11) and the seat frame side plate (2) are rotatably arranged on the inner side of the front part of the seat frame side plate (2) through a fourth hinge point (E).

3. The mechanism for adjusting the difference in height between a back and a seat cushion for facilitating the reclining of a seat according to claim 2, wherein: the seat frame is characterized in that a seat frame sliding block (6) is arranged at the bottom of the front end of the seat frame (1), a sliding groove (6a) extending forwards and backwards is formed in the seat frame sliding block (6), the seat frame front end angle adjusting connecting rods (11) on the left side and the right side are connected through a front rotating shaft (7), and the front rotating shaft (7) penetrates through the sliding groove (6a) to form a sliding pair (D) to be hinged.

4. The mechanism for adjusting the difference in height between a back and a seat cushion for facilitating the reclining of a seat according to claim 1, wherein: when the backrest rotates backwards around the second hinge point (B) relative to the seat frame (1) and is laid flat, the rear end of the seat frame (1) can be lifted upwards by 50-150 mm.

5. The mechanism for adjusting the difference in height between a back and a seat cushion for facilitating the reclining of a seat according to claim 1, wherein: the whole seat basin connecting support (5b) is of a long strip shape and is divided into a front section and a rear section, the front section is flush with the seat frame (1), the rear section is bent upwards relative to the front section, and the cushion suspension spring hanging plate (8) is connected with the rear section in a welding mode.