CN113525197A

CN113525197A - Seat structure that back angle difference was adjusted

Info

Publication number: CN113525197A
Application number: CN202110865417.4A
Authority: CN
Inventors: 王明; 李新家; 严莹
Original assignee: Lear Dongfeng Automotive Seating Co ltd
Current assignee: Lear Dongfeng Automotive Seating Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-10-22

Abstract

The invention discloses a seat structure with a backrest angle adjusted differently. It includes the cushion curb plate of back curb plate and both sides, the back curb plate is articulated and angularly adjustable with the cushion curb plate, still includes the link gear separation blade, be equipped with angle stop gear between link gear separation blade and the back curb plate, the link gear separation blade can be for the cushion curb plate up-and-down motion, cushion curb plate bottom through with position control slide mechanism drive lateral slip, be equipped with between link gear separation blade and the position control slide mechanism be used for with the link gear separation blade is for the link gear linkage of cushion curb plate pulling downwards. The invention has a backrest stepped adjusting structure, and can adjust the range of the backrest according to requirements, so that the seat has the backrests with different adjusting ranges at different positions, thereby providing good riding comfort.

Description

Seat structure that back angle difference was adjusted

Technical Field

The invention belongs to the technical field of automobile seats, and particularly relates to a seat structure with a backrest angle adjusted differently.

Background

At present, the requirement for the comfort of the seat is also increasing. Particularly, when the seat integrates the functions of front-back adjustment, transverse adjustment, backrest adjustment and the like, the matching of the seat and the parts of the vehicle body is more and more complicated.

When designing the adjustment range of the vehicle seat back, the adjustment range is usually determined according to the worst condition of matching of vehicle body parts. For example, rearward adjustment of the seat in certain positions may interfere with certain parts of the vehicle and may directly reduce the range of rearward adjustment of the seat back. When the seat is in other positions, it could be adjusted by a large angle backwards, but without this function for the above considerations, the comfort of the ride is greatly affected.

For example, patent CN108556697B discloses a "seat with a backrest staged adjustment structure", which has the following disadvantages:

the backrest framework rotates around the pivot shaft relative to the cushion framework, the cushion framework is supported on the base in a sliding mode, the cushion framework slides at least between a first position and a second position, the adjusting structure is provided with a backrest trigger fixedly connected with the backrest framework and a linkage mechanism blocking piece movably connected with the cushion framework, and the backrest trigger is provided with a blocking part protruding inwards; when the seat cushion framework is located at the first position, the blocking piece of the linkage mechanism is contacted with the blocking part to limit a first pivoting range of the backrest framework relative to the seat cushion framework; when the seat cushion frame is located at the second position, the blocking piece of the linkage mechanism cannot be contacted with the blocking portion, and a second pivoting range of the backrest frame relative to the seat cushion frame is limited.

There are in particular the following disadvantages:

(1) the contact all the time of gyro wheel and turn-ups in the motion contact process, both can influence the side direction sliding force of seat, also have the friction abnormal sound, influence experience.

(2) And the position of the blocking piece of the linkage mechanism is limited by the thrust cap. This spacing mode, because of the poor intensity of thrust cap self, after mechanism used repeatedly, or the link gear separation blade receives the back on the fender point and assaults, there is the pine to take off the risk in the thrust cap, and then leads to the mechanism to become invalid. Seriously, the entire linkage catch has the potential to fall out of the seat when the thrust cap is released.

(3) The first position and the second position of turn-ups, when the gyro wheel left turn-ups's first position, when beginning to contact the turn-ups of second section, even still not arrive the second position, the back receives great impact force after, the link gear separation blade has the risk of being pushed down, makes the back can cross the fender point, adjusts and gets into second pivot scope, and when the cushion skeleton reachd the second position, the mechanism function is effective.

Disclosure of Invention

The present invention is directed to a seat structure with a backrest angle adjusted differently to overcome the above-mentioned drawbacks of the prior art.

The technical scheme adopted by the invention is as follows: a seat structure with a backrest angle difference adjusting function comprises a backrest side plate and seat cushion side plates on two sides, wherein the backrest side plate is hinged with the seat cushion side plates, the angle of the backrest side plate is adjustable, the seat structure further comprises a linkage mechanism blocking piece, an angle limiting mechanism is arranged between the linkage mechanism blocking piece and the backrest side plate, the linkage mechanism blocking piece can move up and down relative to the seat cushion side plates, the bottom of the seat cushion side plates is driven by a position adjusting sliding mechanism to slide laterally, and a pull wire linkage mechanism used for pulling the linkage mechanism blocking piece downwards relative to the seat cushion side plates is arranged between the linkage mechanism blocking piece and the position adjusting sliding mechanism; when the cushion side plates on the two sides are located at the initial position, the angle limiting mechanism is limited, the adjustable angle range between the backrest side plate and the cushion side plate is alpha, when the cushion side plates on the two sides slide laterally by a distance L1 to a first position, the angle limiting mechanism is limited, the blocking piece of the linkage mechanism is kept in the original position, when the cushion side plates on the two sides slide laterally by a distance L2 to a second position, the stay wire linkage mechanism generates effective displacement L2-L1, the angle limiting mechanism is not limited, the blocking piece of the linkage mechanism moves downwards by L2-L1, the adjustable angle range between the backrest side plate and the cushion side plate is beta, and the angle of the beta is larger than alpha; and a return mechanism is arranged between the blocking piece of the linkage mechanism and the side plate of the cushion.

In a further preferred structure, the angle limiting mechanism comprises a linkage limiting piece fixedly connected to the upper portion of the linkage mechanism blocking piece and a backrest blocking piece arranged on the backrest side plate, and the linkage limiting piece is in contact limiting with the backrest blocking piece.

In a further preferred structure, the position adjusting sliding mechanism comprises a side sliding rail movable rail and a side sliding rail fixed rail, and the side sliding rail movable rail is connected to the side sliding rail fixed rail in a sliding manner.

In a further preferred structure, the pull-wire linkage mechanism comprises a pull wire and a pull-wire anti-loosening spring, the baffle of the linkage mechanism is connected with one end of the pull wire, the other end of the pull wire is connected with one end of the pull-wire anti-loosening spring, the other end of the pull-wire anti-loosening spring is fixed on the side slide rail fixed rail, a pull-wire fixing support is fixed on the side slide rail fixed rail, a pull-wire guide support is fixed on the side slide rail fixed rail, and the pull wire is arranged in the pull-wire fixing support and the pull-wire guide support in a penetrating mode.

In a further preferable structure, the lower part of the blocking piece of the linkage mechanism is fixedly connected with a downward pressing limiting support, and when the lateral sliding distance L1 of the side plates of the cushion at the two sides reaches a first position, the downward pressing limiting support is in contact limiting connection with the flanging support; the turn-ups support is last to set up the breach, and when the cushion curb plate sideslip distance L2 to the second position of both sides, the spacing support of pushing down is located the breach of turn-ups support.

In a further preferred structure, the inner side of the cushion side plate is fixedly connected with an upper step bolt and a lower step bolt, a waist-shaped hole is formed in the linkage mechanism blocking piece, penetrates through the step bolts and is screwed down through a limiting nut, the return mechanism is located between the step bolts and the linkage mechanism blocking piece, and the linkage mechanism blocking piece can move up and down relative to the cushion side plate through the waist-shaped hole.

In a further preferable structure, when the lateral sliding distance of the side plates of the seat cushion on the two sides is L1 to the first position, the end of one end of the stay wire connected with the stay wire anti-loosening spring contacts the stay wire guide bracket, and when the lateral sliding distance of the side plates of the seat cushion on the two sides is L2 to the second position, the stay wire pulls the blocking piece of the linkage mechanism to move downwards to shift L2-L1.

In the invention, L1 is the invalid distance of the pull wire (i.e. the distance between the end of one end of the pull wire connected with the pull wire anti-loosening spring and the pull wire guide bracket at the initial position), and L2 is the maximum displacement of the movable rail of the side slide rail.

In a further preferable structure, the value range of L1 is 60-80 mm; the value range of the L2 is 70-90 mm.

In a further preferred structure, α is 20 °.

In a further preferred structure, a side slide rail fixed rail wrapping bracket is arranged at the bottom of the side slide rail fixed rail; the flanging bracket is fixedly connected to the side surface of the side slide rail fixed rail wrapping bracket.

In a further preferred structure, the return mechanism is a link return spring.

The invention has the beneficial effects that:

(1) the invention has a backrest grading adjustment structure, and can adjust the range of the backrest according to requirements, so that the seat has the backrests with different adjustment ranges at different positions, thereby providing good riding comfort;

(2) the roller is eliminated, so that the moving part and the fixed part are always separated in the process of the lateral sliding rail of the seat, the lateral sliding force of the seat cannot be influenced, and the problem of abnormal friction sound cannot be caused;

(3) the linkage mechanism separation blade is limited without using a thrust cap, and the limitation of the linkage mechanism separation blade is realized by adopting a step bolt and nut mode, and compared with a pin shaft and the thrust cap, the bolt and the nut have better locking performance and stability, and the risk can be effectively improved;

(4) the backrest grading adjustment function is realized without the cooperation of the roller and the two sections of flanges, the stay wire form is used instead, and the realization position of the backrest grading adjustment function is controlled through the stay wire stroke, so that the backrest grading adjustment mechanism is simple, convenient, accurate and effective.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a seat side-sliding front backrest capable of being adjusted only a small angle backwards;

FIG. 3 is a schematic view of a seat side-slipping backrest that can be adjusted rearwardly by a large angle;

FIG. 4 is a schematic structural view of the present invention;

FIG. 5 is a schematic view of the connection of a side plate of the backrest to a side plate of the seat cushion in accordance with the present invention;

FIG. 6 is a schematic view showing the seat sliding laterally with the front pulling wire and the pulling wire anti-loosening spring in a state;

FIG. 7 is a schematic view of the position of the blocking plate of the linkage mechanism before the seat slides laterally;

FIG. 8 is a schematic view showing the seat sliding laterally and the state of the pull-wire and the pull-wire anti-loosening spring;

FIG. 9 is a schematic view showing the position of the blocking plate of the linkage mechanism after the seat slides laterally;

FIG. 10 is a schematic view of the position relationship between the seat side sliding front/rear press-down limit bracket and the flanging bracket.

Wherein, 1-a backrest side plate, 2-a backrest baffle plate, 3-a cushion side plate, 4-a linkage mechanism return spring, 5-a flanging bracket (5-1-a notch), 6-a linkage mechanism limiting plate, 7-a step bolt, 8-a limiting nut, 9-a linkage mechanism baffle plate (9-1-a kidney-shaped hole), 10-a pressing limiting bracket, 11-a side slide rail moving rail, 12-a pull wire fixing bracket, 13-a pull wire guiding bracket, 14-a pull wire, 15-a pull wire anti-loosening spring, 16-a spring bracket, 17-a side slide rail fixed rail and 18-a side slide rail fixed rail wrapping bracket.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 1 and 4, the backrest-adjustable seat cushion comprises a backrest side plate 1 and seat cushion side plates 3 on two sides, wherein the backrest side plate 1 is hinged with the seat cushion side plates 3 and has an adjustable angle, the backrest-adjustable seat cushion further comprises a linkage mechanism blocking piece 9, an angle limiting mechanism is arranged between the linkage mechanism blocking piece 9 and the backrest side plate 1, the linkage mechanism blocking piece 9 can move up and down relative to the seat cushion side plates 3, the bottom of the seat cushion side plate 3 is driven to slide laterally by a position adjusting sliding mechanism, and a pull-wire linkage mechanism for pulling the linkage mechanism blocking piece 9 downwards relative to the seat cushion side plates 3 is arranged between the linkage mechanism blocking piece 9 and the position adjusting sliding mechanism; as shown in fig. 2, 6 and 7, when the seat cushion side plates 3 on both sides are located at the initial position, the angle limiting mechanism limits the position, and the adjustable angle range between the backrest side plate 1 and the seat cushion side plate 3 is α, and when the seat cushion side plates 3 on both sides slide laterally by a distance L1 to the first position, the angle limiting mechanism limits the position, and the link mechanism blocking piece 9 remains in the original position, as shown in fig. 3, 8 and 9, when the seat cushion side plates 3 on both sides slide laterally by a distance L2 to the second position, the cable link mechanism generates an effective displacement L2-L1, the angle limiting mechanism does not limit the position, the link mechanism blocking piece 9 moves downward by L2-L1, and the adjustable angle range between the backrest side plate 1 and the seat cushion side plate 3 is β, and the angle of β is greater than α; a return mechanism is arranged between the blocking piece 9 of the linkage mechanism and the side plate 3 of the cushion.

As shown in fig. 5, the angle limiting mechanism includes a linkage limiting piece 6 fixedly connected to the upper portion of the linkage mechanism blocking piece 9 and a backrest blocking piece 2 arranged on the backrest side plate 1, and the linkage limiting piece 6 is in contact with the backrest blocking piece 2 for limiting.

The position adjusting sliding mechanism comprises a side sliding rail movable rail 11 and a side sliding rail fixed rail 17, and the side sliding rail movable rail 11 is connected to the side sliding rail fixed rail 17 in a sliding mode.

The pull-wire linkage mechanism comprises a pull wire 14 and a pull-wire anti-loosening spring 15, wherein a baffle plate 9 of the linkage mechanism is connected with one end of the pull wire 14, the other end of the pull wire 14 is connected with one end of the pull-wire anti-loosening spring 15, the other end of the pull-wire anti-loosening spring 15 is fixed on a side slide rail fixed rail 17 (through a spring support 16), a pull-wire fixed support 12 is fixed on a side slide rail movable rail 11, a pull-wire guide support 13 is fixed on the side slide rail fixed rail 17, and the pull wire 14 penetrates through the pull-wire fixed support 12 and the pull-wire guide support 13.

As shown in fig. 10, the lower part of the blocking piece 9 of the linkage mechanism is fixedly connected with a downward pressing limit bracket 10, and when the lateral sliding distance L1 of the cushion side plates 3 on both sides reaches a first position, the downward pressing limit bracket 10 is in contact limit connection with the flanging bracket 5 at the moment; the flanging bracket 5 is provided with a gap 5-1, and when the side sliding distances L2 of the cushion side plates 3 on the two sides reach a second position, the downward pressing limiting bracket 10 is positioned in the gap 5-1 of the flanging bracket 5.

The inner side of the cushion side plate 3 is fixedly connected with an upper step bolt 7 and a lower step bolt 7, a kidney-shaped hole 9-1 is formed in the linkage mechanism blocking piece 9, penetrates through the step bolts 7 and is screwed up through a limiting nut 8, the return mechanism is located between the step bolts 7 and the linkage mechanism blocking piece 9, and the linkage mechanism blocking piece 9 can move up and down relative to the cushion side plate 3 through the kidney-shaped hole 9-1.

When the lateral sliding distance of the seat cushion side plates 3 on the two sides is L1 to the first position, the end of one end of the stay wire 14 connected with the stay wire anti-loosening spring 15 contacts the stay wire guide bracket 13, and when the lateral sliding distance of the seat cushion side plates 3 on the two sides is L2 to the second position, the stay wire 14 pulls the blocking piece 9 of the linkage mechanism to move downwards to move to L2-L1.

The value range of the L1 is 60-80 mm; the value range of the L2 is 70-90 mm.

The alpha is 20 degrees.

The bottom of the side slide rail fixed rail 17 is provided with a side slide rail fixed rail wrapping bracket 18; the flanging bracket 5 is fixedly connected to the side surface of the side slide rail fixed rail wrapping bracket 18.

The return mechanism is a linkage mechanism return spring 4.

According to the invention, through the matching of the pull wire 14, the flanging bracket 5 and the blocking piece 9 of the linkage mechanism, the backrest can be adjusted at different angles when the seat is at different positions;

according to the invention, through the matching of the stay wire anti-loosening spring 15 and the stay wire guide bracket 13, the difference conversion between the seat lateral sliding distance and the stay wire effective displacement is realized on the premise that the stay wire 14 is not loosened;

according to the invention, the movable part and the fixed part are always not contacted in the process of the lateral slide rail of the seat by pulling the baffle plate 9 of the linkage mechanism through the pull wire and matching with the setting of the longitudinal length of the flanging bracket 5, so that the problems of abnormal friction sound and large sliding resistance are effectively avoided.

The seat (the cushion side plates 3 at two sides) drives the stay wire 14 to move laterally, and before the end of the stay wire 14 is not contacted with the stay wire guide bracket 13, the stay wire does not generate effective displacement, namely the stay wire can not pull the linkage mechanism limiting piece 6 to move downwards. When the seat slides to the L1, the end of the stay wire contacts the stay wire guide bracket 13, then the seat continues to slide laterally to the L2, in the L2-L1 interval, the stay wire 14 generates effective displacement L2-L1, the stay wire 14 pulls the linkage mechanism limiting sheet 6 to move downwards to the L2-L1, at the moment, the linkage mechanism limiting sheet 6 does not contact with the backrest blocking sheet 2 for limiting, and the adjustable angle range between the seat and the backrest side plate 1 is enlarged.

When the linkage mechanism limiting sheet 6 is pulled by the pull wire 14 to move downwards, the linkage mechanism limiting sheet 6 on the seat frame is separated from the backrest blocking sheet 2 on the backrest on the motion path, and the backrest can continue to rotate.

In the interval of lateral sliding 0-L1, if the backrest receives impact force, the downward pressing limit bracket 10 moves downwards, and the downward pressing limit bracket 10 cannot move downwards continuously after contacting the flanging bracket 5. Namely, when the backrest is impacted, the mechanism can still ensure the effective realization of the function.

By adjusting the length of the pull wire 14 and the longitudinal length of the flanging bracket 5, the trigger can be started at a specified position in the lateral direction, and the baffle plate 9 of the linkage mechanism starts to move downwards at the specified position (the gap 5-1).

Those not described in detail in this specification are within the skill of the art.

Claims

1. The utility model provides a seat structure that back angle difference adjusted, includes cushion curb plate (3) of back curb plate (1) and both sides, back curb plate (1) is articulated and angularly adjustable with cushion curb plate (3), its characterized in that: the cushion is characterized by further comprising a linkage mechanism blocking piece (9), an angle limiting mechanism is arranged between the linkage mechanism blocking piece (9) and the backrest side plate (1), the linkage mechanism blocking piece (9) can move up and down relative to the cushion side plate (3), the bottom of the cushion side plate (3) is driven to slide laterally through a position adjusting sliding mechanism, and a pull wire linkage mechanism used for pulling the linkage mechanism blocking piece (9) downwards relative to the cushion side plate (3) is arranged between the linkage mechanism blocking piece (9) and the position adjusting sliding mechanism; when the cushion side plates (3) on the two sides are located at the initial position, the angle limiting mechanism is limited, the adjustable angle range between the backrest side plate (1) and the cushion side plate (3) is alpha, when the cushion side plates (3) on the two sides slide laterally by a distance L1 to the first position, the angle limiting mechanism is limited, the linkage mechanism blocking piece (9) is kept in the original position, when the cushion side plates (3) on the two sides slide laterally by a distance L2 to the second position, the stay wire linkage mechanism generates effective displacement L2-L1, the angle limiting mechanism is not limited, the linkage mechanism blocking piece (9) moves downwards by L2-L1, the adjustable angle range between the backrest side plate (1) and the cushion side plate (3) is beta, and the angle of the beta is larger than alpha; a return mechanism is arranged between the blocking piece (9) of the linkage mechanism and the side plate (3) of the cushion.

2. The differential backrest angle adjustment seat structure of claim 1, wherein: the angle limiting mechanism comprises a linkage limiting piece (6) fixedly connected to the upper portion of the linkage mechanism blocking piece (9) and a backrest blocking piece (2) arranged on the backrest side plate (1), and the linkage limiting piece (6) is in contact limiting with the backrest blocking piece (2).

3. The differential backrest angle adjustment seat structure of claim 1, wherein: the position adjusting sliding mechanism comprises a side sliding rail movable rail (11) and a side sliding rail fixed rail (17), and the side sliding rail movable rail (11) is connected to the side sliding rail fixed rail (17) in a sliding mode.

4. The differential backrest angle adjustment seat structure of claim 3, wherein: the pull-wire linkage mechanism comprises a pull wire (14) and a pull-wire anti-loosening spring (15), wherein a linkage mechanism separation blade (9) is connected with one end of the pull wire (14), the other end of the pull wire (14) is connected with one end of the pull-wire anti-loosening spring (15), the other end of the pull-wire anti-loosening spring (15) is fixed on a side slide rail fixed rail (17), a pull-wire fixed support (12) is fixed on a side slide rail movable rail (11), a pull-wire guide support (13) is fixed on the side slide rail fixed rail (17), and the pull wire (14) penetrates through the pull-wire fixed support (12) and the pull-wire guide support (13).

5. The differential backrest angle adjustment seat structure of claim 1, wherein: the lower part of the blocking piece (9) of the linkage mechanism is fixedly connected with a downward pressing limiting support (10), and when the lateral sliding distance L1 of the cushion side plates (3) on the two sides reaches a first position, the downward pressing limiting support (10) is in contact limiting connection with the flanging support (5); the flanging bracket (5) is provided with a notch (5-1), and when the side sliding distances of the cushion side plates (3) on the two sides are L2 to the second position, the downward pressing limiting bracket (10) is positioned in the notch (5-1) of the flanging bracket (5).

6. The differential backrest angle adjustment seat structure of claim 1, wherein: the cushion side plate (3) is fixedly connected with an upper step bolt and a lower step bolt (7) on the inner side, a waist-shaped hole (9-1) is formed in the linkage mechanism separation blade (9) and penetrates through the step bolt (7) and is screwed up through a limiting nut (8), the return mechanism is located between the step bolt (7) and the linkage mechanism separation blade (9), and the linkage mechanism separation blade (9) can move up and down relative to the cushion side plate (3) through the waist-shaped hole (9-1).

7. The differential backrest angle adjustment seat structure as claimed in claim 4, wherein: when the lateral sliding distance of the seat cushion side plates (3) on the two sides is L1 to the first position, the end head of one end of the stay wire (14) connected with the stay wire anti-loosening spring (15) is in contact with the stay wire guide support (13), and when the lateral sliding distance of the seat cushion side plates (3) on the two sides is L2 to the second position, the stay wire (14) pulls the blocking piece (9) of the linkage mechanism to move downwards to move to be L2-L1.

8. The differential backrest angle adjustment seat structure according to claim 1, 5 or 7, wherein: the value range of the L1 is 60-80 mm; the value range of the L2 is 70-90 mm.

9. The differential backrest angle adjustment seat structure of claim 3, wherein: the bottom of the side slide rail fixed rail (17) is provided with a side slide rail fixed rail wrapping bracket (18); and the flanging bracket (5) is fixedly connected to the side surface of the side slide rail fixed rail wrapping bracket (18).

10. The differential backrest angle adjustment seat structure according to claim 1 or 6, wherein: the return mechanism is a linkage mechanism return spring (4).