CN110614940B

CN110614940B - Adjustable seat with foldable backrest

Info

Publication number: CN110614940B
Application number: CN201910922526.8A
Authority: CN
Inventors: 梁业; 刘健杰; 陈亚雄; 薛俊; 郁军
Original assignee: Yanfeng Adient Seating Co Ltd
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-11-27
Anticipated expiration: 2039-09-27
Also published as: CN110614940A

Abstract

The invention relates to an adjustable seat with a foldable backrest, which comprises a bracket, a cushion and a backrest, wherein the first end of the bracket is fixedly connected with a vehicle body, the second end of the bracket is pivoted with the cushion through a sitting and backrest connecting shaft, the first end of the backrest is slidably connected to one side of the first end of the bracket in a sitting state to realize sitting and backrest linkage, the second end of the backrest is pivoted with the cushion through the sitting and backrest connecting shaft, and the first end of the backrest is detached from the first end of the bracket in a foldable state and rotates around the sitting and backrest connecting shaft to realize backrest folding. According to the adjustable seat with the foldable backrest, the backrest and the seat cushion can be adjusted in a linkage manner, the requirement on comfort performance is met, meanwhile, the backrest can be turned flat, and the space of a trunk is enlarged. In addition, according to the adjustable seat with the foldable backrest, only one side of the vehicle body fixing point is needed by the backrest, and the adjustable seat can be applied to various vehicle types.

Description

Adjustable seat with foldable backrest

Technical Field

The invention relates to an automobile seat, in particular to an adjustable seat with a foldable backrest.

Background

Adjustable seats are also known as linked seats, recumbent linked seats, or Slouch seats. The adjustable seat on the existing market is formed by linkage adjustment of a seat cushion and a backrest, the seat cushion is adjusted forwards, and the angle of the backrest is adjusted backwards at the same time, so that the requirement of comfort level is met. However, the backrest of the known adjustable seat can only be adjusted in angle and cannot be turned forward, which results in a smaller space of the luggage case, influences the use space of the luggage case and is not practical enough. In addition, the backrest of the known adjustable seat adopts a structure of guide rods with double side guide grooves, which means that fixing points are needed on both sides, so that the application of the adjustable seat is limited, the structure of the car body of the car can be suitable, and if the car is of an SUV type or an MPV type, the fixing point at the middle position of the car body cannot be arranged, so that the application of the adjustable seat is limited. Moreover, if the structure of the guide rod with the single-side guide groove is simply selected, a instability problem is caused, once the deformation of the backrest on the side without the fulcrum is too large, the linkage function (namely the slope function) is directly influenced, and the problems of abnormal noise, excessive sliding friction force, unsmooth sliding function and the like are obvious.

Disclosure of Invention

The invention provides an adjustable seat with a foldable backrest, which aims to solve the problems that an adjustable seat in the prior art cannot be turned forwards and the like.

The adjustable seat with the foldable backrest comprises a bracket, a cushion and a backrest, wherein a first end of the bracket is fixedly connected with a vehicle body, a second end of the bracket is pivoted with the cushion through a sitting and backrest connecting shaft, a first end of the backrest is slidably connected to one side of the first end of the bracket in a sitting state to realize sitting and backrest linkage, a second end of the backrest is pivoted with the cushion through the sitting and backrest connecting shaft, and a first end of the backrest is detached from the first end of the bracket in a folding state and rotates around the sitting and backrest connecting shaft to realize backrest folding.

Preferably, the bracket includes a tube, a sliding structure and a connecting steel wire, wherein the sliding structure and the connecting steel wire are respectively and fixedly connected to a first end of the tube, a second end of the tube is pivoted to the seat connecting shaft, the sliding structure is a three-degree-of-freedom system and is fixedly connected to the vehicle body, and the connecting steel wire is slidably and detachably connected to a first end of the backrest.

Preferably, this sliding construction includes a connection panel beating, a slider assembly and a slip steel wire, wherein, this connection panel beating and this automobile body fixed connection, but this slider assembly pivot ground is connected on this connection panel beating, but this slip steel wire pivot and slidable insert this slider assembly in, the both ends fixed connection that stretches out in this slider assembly of the follow of this slip steel wire is in the first end of this pipe.

Preferably, this slider component includes an envelope structure and holds a slider in this envelope structure, and this slip steel wire inserts in this slider, and this envelope structure includes an interior surrounding panel beating and an outer surrounding panel beating, and this interior surrounding panel beating and this outer surrounding panel beating are connected fixedly so that this slider is located between this interior surrounding panel beating and this outer surrounding panel beating through a fastening component, and this outer surrounding panel beating realizes the pin joint through a pin joint subassembly with this connection panel beating.

Preferably, the slider has a body defining a longitudinal slot in which the sliding wire is received to be pivotable and slidable, and a guide tab projecting from the body at an entrance of the longitudinal slot and having a preload amount for depressing the sliding wire.

Preferably, the slider further has an elastic piece protruding from the body at the bottom of the longitudinal groove and defining a predetermined tolerance adjusting gap for tilting the sliding wire.

Preferably, the sliding structure further comprises an upper reinforcing plate, two ends of the sliding steel wire extending out of the sliding block assembly are fixedly connected to the upper reinforcing plate, the upper reinforcing plate is fixedly connected to the first end of the pipe, and two ends of the connecting steel wire are respectively fixedly connected to the first end of the pipe and the upper reinforcing plate.

Preferably, the bracket further comprises a lower reinforcing plate fixedly connected to the second end of the tube and pivotally connected to the seating connection shaft.

Preferably, the first end of the backrest has an upper lock and a pull strap coupled thereto, and the connecting wire and the upper lock are locked in the sitting state and unlocked by the pull strap in the folded state.

Preferably, the seat-back connecting shaft is a bidirectional stepped shaft inserted into the seat cushion, and the second end of the bracket and the second end of the seat back are respectively pivoted to two opposite ends of the bidirectional stepped shaft.

Preferably, the bidirectional stepped shaft includes a first section, a second section and a third section, wherein the first section is inserted into the cushion and pivotally connected to the second end of the backrest by a first step bolt, the third section is inserted into the second end of the bracket and pivotally connected to the second end of the bracket by a second step bolt, the second section is disposed between and connects the first section and the third section, and the diameter of the second section is greater than the diameter of the first section and the diameter of the third section, respectively.

Preferably, the length of the third section is between 26mm-60 mm.

According to the adjustable seat with the foldable backrest, the backrest and the seat cushion can be adjusted in a linkage manner, the requirement on comfort performance is met, meanwhile, the backrest can be turned flat, and the space of a trunk is enlarged. In addition, according to the adjustable seat with the foldable backrest, only one side of the vehicle body fixing point is needed by the backrest, and the adjustable seat can be applied to various vehicle types. Particularly, the adjustable seat with the foldable backrest solves the problems of instability, abnormal sound and smooth sliding of the guide rod structure with the guide groove at one side through the single-side sliding structure, can absorb certain tolerance and ensures the smoothness of the slope function.

Drawings

FIG. 1A illustrates a seating position of an adjustable seat with a foldable backrest according to a preferred embodiment of the present invention;

FIG. 1B illustrates a flat-out position of the adjustable seat of the reversible backrest of FIG. 1A;

FIG. 2 is a schematic structural view of an adjustable seat with a foldable backrest according to another preferred embodiment of the present invention;

figure 3 is an exploded view of the seat cushion and backrest of figure 2;

figure 4 is an exploded view of the seat cushion, backrest and bracket of figure 2;

FIG. 5 shows a process of unlocking the backrest of FIG. 4 from a state of being locked to the bracket;

FIG. 6 is an installed cross-sectional view of the bi-directional stepped shaft of FIG. 4;

FIG. 7 is an exploded view of the sliding structure of FIG. 4;

FIG. 8 is a cross-sectional view of the sliding motion structure of FIG. 4;

FIG. 9 illustrates the sliding structure of FIG. 4 moving from an initial position to a forward-most position;

FIG. 10A is a schematic diagram of the slider structure of FIG. 7;

FIG. 10B is a cross-sectional view of the slider of FIG. 7;

fig. 11 shows the process of sliding the wire into the slider of fig. 7.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1A-1B, the adjustable seat with a foldable backrest according to a preferred embodiment of the present invention includes a bracket 1 ', a seat cushion 2 ' and a backrest 3 ', and as shown in fig. 1A, in a sitting state, the seat cushion 2 ' is adjusted forward relative to the vehicle body (e.g., the seat cushion is adjusted forward by 100mm), and the backrest 3 ' is simultaneously adjusted backward (e.g., the included angle of the seat and backrest is increased by 10.4 ° to 115.2 ° from 104.8 °), so as to meet the comfort requirement during sitting. During the rearward angling of the backrest 3 ', the upper portion of the backrest 3 ' is slidably connected to the upper portion of the bracket 1 '. By releasing the connection of the upper part of the bracket 1 ' and the upper part of the backrest 3 ', the backrest 3 ' can be turned flat forward, as shown in fig. 1B, increasing the luggage space. Obviously, since the bracket 1 ' is located only on one side of the backrest 3 ', the fixing point for mounting the bracket 1 ' only needs to be located on one side of the vehicle body, so that the adjustable seat can be adapted to a wider variety of vehicle types. It should be understood that although the bracket 1 'in fig. 1A-1B is shown to be located on the left side of the backrest 3', the bracket 1 could obviously also be located on the right side of the backrest 3, as shown in fig. 2. Specifically, the upper portion of the bracket 1 is fixedly connected to the vehicle body, and is slidably connected (during the sitting-leaning linkage) and detachably connected (during the backrest folding) to the upper portion of the backrest 3, and the lower portions of the bracket 1 and the backrest 3 are respectively pivotally connected to the rear end of the seat cushion 2 through a sitting-leaning connecting shaft (i.e., a bidirectional stepped shaft 22, see fig. 3). In the present embodiment, the seat cushion 2 is a 40% seat cushion frame (i.e., it takes up 40% of the length in the rear seat), the bracket 1 is a 10% Bolster frame, and the seatback 3 is a 30% seatback frame.

As shown in fig. 3, the rear end of the seat cushion 2 has two seat cushion pivot portions 21 symmetrically arranged, and a two-way step shaft 22 is inserted on one seat cushion pivot portion 21 adjacent to the bracket 1 (see fig. 2). The lower part of the backrest 3 has two backrest pivot parts 31 arranged symmetrically. Two-step bolts 2a are inserted into the backrest pivoting part 31 and the seat cushion pivoting part 21, respectively, to realize pivotal connection of the lower portion of the backrest 3 with the rear end of the seat cushion 2. Specifically, a stepped bolt 2a (e.g., M10 stepped bolt) adjacent to the bracket 1 (see fig. 2) is inserted into the left end of the bidirectional stepped shaft 22 to be engaged. In addition, the upper portion of the backrest 3 has an up-lock 32 and a pull strap 33 coupled thereto.

As shown in fig. 4, the bracket 1 includes a tube 11 (e.g., a square tube), a sliding structure 12, a connecting wire 13, and a lower reinforcing plate 14, wherein the sliding structure 12 and the connecting wire 13 are fixedly coupled to an upper portion of the tube 11, and the lower reinforcing plate 14 is fixedly coupled (e.g., welded) to a lower portion of the tube 11 to enhance coupling strength of the lower portion of the bracket 1. Specifically, the sliding structure 12 is fixedly connected with the vehicle body, and the connecting wire 13 is connected with the upper lock 32 of the backrest 3. Thus, in the process of seat-back linkage, the connecting steel wire 13 is locked with the upper lock 32 and still has a certain degree of freedom of movement so as to facilitate the angle adjustment of the backrest 3 back and forth; as shown in fig. 5, the pull tab 33 is pulled upward to unlock the up lock 32, so that the connecting wire 13 can be pulled out of the up lock 32, so that the backrest 3 can be folded back and forth, for example, from the seating state to the flat-folded state. The specific locking and unlocking principles of the up-lock 32 are prior art and will not be described in detail herein. Further, the lower portion of the tube 11 and the lower reinforcing plate 14 are fitted over the bidirectional stepped shaft 22 to effect pivotal connection of the lower portion of the bracket 1 to the rear end of the seat cushion 2, and specifically, a stepped bolt 1a (e.g., M10 stepped bolt) is inserted into the right end of the bidirectional stepped shaft 22 to be engaged therewith.

As shown in fig. 6, the bidirectional stepped shaft 22 includes a first section 221, a second section 222 and a third section 223, wherein the first section 221 is inserted into the cushion pivot portion 21 and pivotally connected to the backrest pivot portion 31 by a step bolt 2a, the third section 223 is inserted into the tube 11 and pivotally connected to the lower reinforcing plate 14 by a step bolt 1a, the second section 222 is disposed between the first section 221 and the third section 223 and connects the first section 221 and the third section 223, and the diameter of the second section 222 is respectively larger than the diameter of the first section 221 and the third section 223 to perform a limiting function. In particular, the bidirectional stepped shaft 22 according to the invention is optimized to be moderately elongated, for example such that the length of the third section 223 is between 26mm-60mm, in particular between 30mm-50 mm. In this embodiment, the third section 223 has a length of 47mm, which is 22mm longer than the conventional 25 mm. Thus, the torsion resistance can be improved by increasing the fulcrum distance of the bracket 1 on the seating connection shaft (i.e., the bidirectional stepped shaft 22).

As shown in fig. 7 to 8, the sliding structure 12 includes a connecting metal plate 121, a slider assembly 122, a sliding steel wire 123 and an upper reinforcing plate 124, wherein the connecting metal plate 121 is fixedly connected with the vehicle body, the slider assembly 122 is connected to the connecting metal plate 121 to be pivotable with respect to the connecting metal plate 121, the sliding steel wire 123 is inserted into the slider assembly 122 to be slidable with respect to the slider assembly 122 and to be pivotable together with the slider assembly 122, both ends of the sliding steel wire 123 protruding from the slider assembly 122 are fixedly connected (e.g., welded) to the upper reinforcing plate 124, and the upper reinforcing plate 124 is fixedly connected (e.g., welded) to the upper portion (see fig. 4) of the pipe 11 to enhance the connecting strength of the upper portion of the bracket 1, and particularly, both ends of the connecting steel wire 13 (see fig. 4) are welded to both the pipe 11 and the upper reinforcing plate. In addition, the slider assembly 122 includes a surrounding structure 1221 and a slider 1222 (e.g., a POM slider) housed within the surrounding structure 1221. The surrounding structure 1221 includes an inner surrounding sheet metal 1221a and an outer surrounding sheet metal 1221b, which are connected and fixed by a fastening component (e.g., M8 nut 122a spot-welded to the inner surrounding sheet metal 1221a, and M8 projection-welded nut 122b passed through the outer surrounding sheet metal 1221b and fastened to M8 nut 122 a), so that the slider 1222 is located between the inner surrounding sheet metal 1221a and the outer surrounding sheet metal 1221 b. In addition, the outer surrounding sheet metal 1221b and the connecting sheet metal 121 are pivoted by a pivoting assembly (for example, an M10 step bolt 121a which penetrates through the spot welded outer surrounding sheet metal 1221b, an S14 clip 121b which is snapped into the connecting sheet metal 121, and an M10 step bolt 121a which penetrates through and connects the sheet metal 121 and the S14 clip 121b and is fastened by an M10 flange nut 121 c). Compared with the guide groove and guide rod structure in the prior art (the guide rod of the backrest slides in the guide groove of the connecting metal plate), the sliding steel wire 123 disclosed by the invention is inserted into the sliding assembly 122 to slide, so that the stability and smoothness of the sliding force are ensured, and the problems of instability, abnormal sound and smoothness in sliding of the guide rod structure with the guide groove at one side are solved. In particular, the sliding structure 12 according to the invention is a three-degree-of-freedom system: one shaft is rotated (the slider assembly 122 is rotatable around the axis X defined by the step bolt 121 a), one shaft is slid and in a collision state, the slider assembly 122 is rotatable along the axis of the slide wire 123 (the slider assembly 122 is slidable and rotatable along the axis Y defined by the slide wire 123), as shown in fig. 9.

As shown in fig. 10A to 10B, the slider 1222 has a body 1222a defining a longitudinal slot 12221, and the slide wire 123 is pivotally and slidably received in the longitudinal slot 12221 (see fig. 8). The slider 1222 also has a guide tab 1222b (i.e., a lead-in paddle) and a resilient tab 1222c (i.e., an adaptive gap adjustment tab) extending from the body 1222 a. In fig. 10A-10B, the guide tab 1222B extends from the body 1222a above the longitudinal slot 12221 and has a preload amount to depress the slide wire 123. As shown in fig. 11, during the process of the sliding wire 123 being introduced into the longitudinal groove 12221, an external force is first applied to the guide tab 1222b to raise it upward to facilitate the introduction of the sliding wire 123, and after the external force is removed, the guide tab 1222b presses the sliding wire 123 downward to ensure that the sliding wire 123 does not shake undesirably. As shown in fig. 10A to 10B, the elastic piece 1222c protrudes from the body 1222a below the longitudinal slot 12221 and defines a predetermined tolerance adjusting gap of the upwarp slide wire 123, which is capable of preventing the slide wire 123 from shaking by engaging the guide piece 1222B on the one hand, and adjusting the tolerance by being pressed down by the slide wire 123 on the other hand, thereby making the slouch function of the adjustable seat according to the present invention more stable. In addition, the slider 1222 has positioning bumps 12222 that mate with positioning grooves on the surrounding structure 1221 (see fig. 8) to achieve positioning of the slider 1222 and the surrounding structure 1221. Compared with the guide groove and guide rod structure in the prior art, the sliding block 1222 of the invention can absorb a certain tolerance through the elastic piece 1222c, and the smoothness of the slouch function is ensured.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. An adjustable seat with a foldable backrest is characterized by comprising a bracket, a cushion and a backrest, wherein a first end of the bracket is fixedly connected with a vehicle body, a second end of the bracket is pivoted with the cushion through a backrest connecting shaft, the first end of the backrest is slidably connected to one side of the first end of the bracket in a sitting state to realize backrest linkage, the second end of the backrest is pivoted with the cushion through the backrest connecting shaft, the first end of the backrest is detached from the first end of the bracket in a folding state and rotates around the backrest connecting shaft to realize backrest folding, the bracket comprises a pipe, a sliding structure and a connecting steel wire, the sliding structure and the connecting steel wire are respectively and fixedly connected to the first end of the pipe, the second end of the pipe is pivoted with the backrest connecting shaft, and the sliding structure is a three-degree-of-freedom system and is fixedly connected with the vehicle body, the connecting steel wire is connected with the first end of the backrest in a sliding and detachable mode.

2. The adjustable seat according to claim 1, wherein the sliding structure comprises a connecting metal plate, a slider assembly, a sliding steel wire and an upper reinforcing plate, wherein the connecting metal plate is fixedly connected with the vehicle body, the slider assembly is pivotally connected to the connecting metal plate, the sliding steel wire is pivotally and slidably inserted into the slider assembly, two ends of the sliding steel wire extending out from the slider assembly are fixedly connected to the upper reinforcing plate, the upper reinforcing plate is fixedly connected to the first end of the tube, and two ends of the connecting steel wire are fixedly connected to the first end of the tube and the upper reinforcing plate, respectively.

3. The adjustable seat according to claim 2, wherein the slider assembly comprises an enclosure structure and a slider accommodated in the enclosure structure, the sliding steel wire is inserted into the slider, the enclosure structure comprises an inner enclosure metal plate and an outer enclosure metal plate, the inner enclosure metal plate and the outer enclosure metal plate are fixedly connected through a fastening assembly so that the slider is located between the inner enclosure metal plate and the outer enclosure metal plate, and the outer enclosure metal plate and the connecting metal plate are pivotally connected through a pivoting assembly.

4. The adjustable seat of claim 3, wherein the slide has a body defining a longitudinal slot and a guide tab, wherein the slide wire is pivotally and slidably received in the longitudinal slot, and wherein the guide tab extends from the body at an entrance to the longitudinal slot and has an amount of preload to depress the slide wire.

5. The adjustable seat of claim 4 wherein the slider further comprises a resilient tab extending from the body at the bottom of the longitudinal slot and defining a predetermined tolerance adjustment gap for tilting the slide wire.

6. The adjustable seat of claim 1, wherein the bracket further comprises a lower reinforcement plate fixedly attached to the second end of the tube and pivotally attached to the seating connection shaft.

7. The adjustable seat according to claim 1, wherein the first end of the backrest has an up lock and a drawstring coupled thereto, the connecting wire being locked with the up lock in the seating state and unlocked by the drawstring in the folded state.

8. The adjustable seat as claimed in claim 1, wherein the connecting shaft for the seat back is a bi-directional stepped shaft inserted into the seat cushion, and the second end of the bracket and the second end of the seat back are pivotally connected to opposite ends of the bi-directional stepped shaft, respectively.

9. The adjustable seat of claim 8, wherein the bi-directional stepped shaft comprises a first section, a second section and a third section, wherein the first section is inserted into the seat cushion and pivotally connected to the second end of the backrest by a first step bolt, the third section is inserted into the second end of the bracket and pivotally connected to the second end of the bracket by a second step bolt, the second section is disposed between and connects the first section and the third section, and the diameter of the second section is greater than the diameter of the first section and the third section, respectively.

10. The adjustable seat of claim 9, wherein the length of the third section is between 26mm-60 mm.