JP5951819B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a cushion material (a member that elastically supports an occupant) that forms a seat outer shape.

As this type of vehicle seat, a vehicle seat including a seat cushion, a seat back, and a headrest is known (see Patent Document 1).
The seat back is a member that is connected to the seat cushion so as to be able to rise and fall, and has a cushion material that forms a seat outer shape.
The cushion material is a member that elastically supports an occupant, and includes a main portion and a pair of side portions. The main part is a flat part in the center of the cushion material and can face the occupant body part. Moreover, a pair of side part is a convex part located in the main part both sides, and protrudes in the seating side rather than the main part.
And the side part is divided into two parts up and down the seat, and has an inner side part connected to the main part and an outer side part on the side of the inner side part. The inner side portion and the outer side portion are respectively formed on the upper and lower sides of the side portion (continuously on the upper and lower sides of the sheet).

In the known technique, the outer side portion (the portion located closest to the side of the sheet) is formed of a urethane foam with high hardness. Further, the inner side portion and the main portion are formed of urethane foam having a lower hardness than the outer side portion (flexible).
And during normal operation, the occupant's torso and shoulders are gently supported by the inner side and the main part (low hardness part) to reduce the feeling of pressure on the occupant (with a structure that is excellent in seating properties). is there). In addition, the support of the seat can be maintained to some extent by firmly supporting the occupant at the outer side portion (high hardness portion).

Japanese Patent Laid-Open No. 2001-70083

By the way, in the known technique, the inner side portion is formed continuously above and below the sheet. For this reason, when the occupant's load shift occurs during cornering or when the vehicle collides, the occupant's pressing force is applied to the side part (for example, the lower part of the inner side part) and the support performance of the cushion material becomes insufficient. was there.
The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to improve the support performance of the cushioning material while maintaining good seating performance.

As means for solving the above-mentioned problems, the vehicle seat of the first invention has a seat cushion and a seat back that is connected to the seat cushion in a tiltable manner. The seat back has a resiliently supportable cushion material the occupant without a seat contour, the frame member having a seat frame, headrest, is disposed in the seat back upward in a state mounted to the frame member it is a Tei Ru configuration.
In this type of seat configuration, it is desirable to be able to improve the support performance of the cushion material while maintaining good seating properties.

In the present invention, the above-described cushion material has a main part that can face the occupant body part, and a side part that is disposed on the side of the main part and protrudes to the seat back side. And the side part has the 1st site | part which can be arrange | positioned on the upper part of a side part, and can face a passenger | crew shoulder part, and the 2nd site | part which comprises side parts other than a 1st site | part on the basis of the seat back in a standing state.
Therefore, in the present invention, the first part (part that can face the occupant shoulder) and the main part are configured to be more elastic (elastically shrinkable) than the second part, so that the seating ability of the occupant is improved. Can be maintained well. In addition, since the second part (lower side part and the like) is less likely to be elastic than the first part and the main part, the support performance of the cushion material can be improved.

The seat of the first invention, the cushion material on the frame member in a state where the gap portion is provided is arranged between the frame member and the first portion. The gap is formed by recessing the first part toward the seating side and separating it from the frame member. And by occupant being pressed against the seat back by impact such as when the vehicle collides, and the cushion material upper part is in an elastic state, by reducing the gap between the frame member and the first part, The headrest is configured to move relative to the seat back side of the seat back.
In the present invention, in the event of a vehicle collision, the headrest is moved relative to the seating side (swiftly brought into contact with the occupant's head), so that the anteroposterior movement of the occupant's head can be suitably prevented or reduced (with excellent support performance) is there).
Further, the vehicle seat of the second invention is arranged in the vehicle seat of the first invention in such a manner that the second part at the lower part of the side portion is in contact with the frame member.

  According to the first aspect of the present invention, the support performance of the cushion material can be improved while maintaining good seating performance. According to the second invention, the support performance of the cushion material can be further improved.

It is a perspective view of a vehicle seat. It is a perspective view of a cushion material. It is a cross-sectional view of a part of the seat back. It is a schematic side view of a vehicle seat showing a seat back in a sectional view, (a) is a diagram of a vehicle seat at a normal time, (b) is a diagram of a vehicle seat at a rear impact.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each of the drawings, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B is attached to the rear of the vehicle seat, a reference symbol UP is provided above the vehicle seat, and a reference symbol DW is provided below the vehicle seat.
The vehicle seat 2 in FIG. 1 has a seat cushion 4, a seat back 6, and a headrest 8. These seat components include a frame member (4F, 6F, 8F) forming a seat skeleton, a cushion material (4P, 6P, 8P) forming a seat outer shape, and a covering material (4S, 6S, 8S) covering the cushion material. And have.
Here, the headrest 8 has a pair of stay members 8 a and is attached to the upper portion of the seat back 6. Each of the pair of stay members 8a is a rod-like member, and can be arranged in parallel at a predetermined interval below the headrest 8.

The seat back 6 is a member (substantially rectangular shape) that is connected to the seat cushion 4 so as to be tiltable, and has the above-described basic configurations 6F, 6P, and 6S. Examples of the skin material 6S include fabric (woven fabric, knitted fabric, non-woven fabric) and leather.
In this embodiment, the cushion material 6P is covered with the skin material 6S while being disposed on the frame member 6F (see FIGS. 1 to 4). The occupant PA is elastically supported by the cushion material 6P. In this type of seat configuration, it is desirable that the support performance of the cushion material 6P can be improved while maintaining good seating performance.
Therefore, in this embodiment, the support performance of the cushioning material 6P is improved with the configuration described later while maintaining good seating performance. Hereinafter, each configuration will be described in detail.

[Frame member]
The frame member 6F (arch shape) includes an upper frame 6a and a pair of side frames 6b (see FIGS. 3 and 4).
The upper frame 6a is a rod-shaped member (substantially inverted U shape in a front view) that forms the upper part of the seat, and has a pair of brackets (not shown). The pair of brackets are cylindrical members into which the stay member 8a can be inserted. In the present embodiment, the pair of brackets can be disposed at a predetermined interval on the upper frame 6a.
Each of the pair of side frames 6b is a flat plate member that forms a seat side, and is fixed to the lower end (free end) side of the upper frame 6a.

[Cushion material]
The cushion material 6P (substantially rectangular shape) is a member that elastically supports the occupant PA (see FIGS. 2 to 4). The cushion material 6P of the present embodiment includes a pair of hole portions 10, a main portion 12, a pair of side portions 14, a backing material 16, and a plurality of groove portions 31 to 33.
Each of the pair of holes 10 is a through hole of the cushion material 6P, and can be formed at a predetermined interval above the cushion material 6P. In this embodiment, the stay member 8a can be fixed to the upper frame 6a (bracket) through each hole 10.
Further, the backing material 16 is a planar member that is inferior in stretchability (not easily stretched) than the cushion material 6P, and can be disposed on the back surface side of the cushion material 6P. Examples of the backing material 16 include fabric (woven fabric, knitted fabric, nonwoven fabric), leather, and resin layer.
The plurality of groove portions (the first groove portion 31, the second groove portion 32, and the third groove portion 33) are recessed portions (linear) of the cushion material 6P, respectively, and for example, a part of the skin material 6S can be retracted.

(Main part)
The main part 12 is a flat part at the center of the cushion material 6P, and can face the occupant trunk part (back part, waist part, etc.) (see FIG. 2). The main portion 12 of the present embodiment is a wide, substantially rectangular (front view) portion, and is divided into upper and lower portions by a first groove portion 31 extending in the sheet width direction.
The material of the main portion 12 is not particularly limited, but is a material that is more flexible (flexible) than the second portion 14b described later. An example of this type of material is a low hardness (soft) polyurethane foam.

(Side part)
The side portion 14 is a portion that is disposed on the side of the main portion 12 and protrudes toward the seating side of the seat back 6, and includes a first portion 14 a and a second portion 14 b (see FIGS. 2 to 4).
In the present embodiment, a pair of side portions 14 are formed on both sides of the main portion 12. Each side portion 14 is a narrow, substantially rectangular portion (front view) and is separated from the main portion 12 by a second groove portion 32 extending in the vertical direction of the seat. And the 1st site | part 14a and the 2nd site | part 14b (after-mentioned) will be divided by the substantially rectangular 3rd groove part 33. FIG.

(First part)
The first part 14 a is a part that can face the occupant shoulder and can be formed on the upper part of the side part 14. The first part 14a of the present embodiment is a part of a substantially rectangular shape (long in the vertical direction of the sheet) inside the third groove part 33, and has a slightly short width (from the side of the main part 12 to the side part 14). Formed approximately in the middle).
Here, the material of the first portion 14a is not particularly limited, but is a material that is more flexible (flexible) than the second portion 14b described later. An example of this type of material is a low hardness (soft) polyurethane foam. In addition, the main part 12 and the 1st site | part 14a can be formed with the same material (material of the same hardness), and can also be formed with another material (material of different hardness).

In the present embodiment, the first portion 14a is continuously provided in the thickness direction of the side portion 14 (from the seating side to the back surface side). As described later, a clearance (gap 40) can be formed between the upper frame 6a and the first portion 14a by appropriately adjusting the thickness dimension of the first portion 14a.
Here, it is desirable that the back surface side of the first portion 14 a be exposed without providing the backing material 16. By doing so, the first portion 14a is easily elasticized by the pressing force (described later) of the occupant PA.

(Second part)
The 2nd site | part 14b is a site | part which comprises the side parts 14 other than the 1st site | part 14a. The 2nd site | part 14b of a present Example comprises the side part 14 lower part and the side part 14 upper part (The side of the 1st site | part 14a, the upper part, etc.) except the 1st site | part 14a.
The second portion 14b is made of a material that is inferior in elasticity (high hardness) than the main portion 12 and the first portion 14a. Examples of this type of material include high-hardness polyurethane foam (such as polyurethane foam having a hardness approximately three times that of low-hardness polyurethane foam).

[Cushion material placement work (formation of gaps)]
2 to 4, the cushion material 6P is covered with the skin material 6S while being disposed on the frame member 6F.
At this time, a clearance (gap 40) is formed between the upper frame 6a and the first portion 14a (see FIG. 3). Thus, during normal operation, the upper frame 6a and the first portion 14a are spaced apart by the gap 40. Further, by appropriately adjusting the thickness dimension of the second portion 14b, the second portion 14b (back surface side) below the side portion 14 is brought into contact with the frame member 6F.
Next, the headrest 8 is disposed above the seat back 6 while being attached to the frame member 6F. By doing so, the headrest 8 is attached to the seat back 6 without following the elasticity (described later) of the cushion material 6P.

During normal operation, the first part 14a and the main part 12 (parts excellent in elasticity) support the occupant trunk and shoulders, thereby reducing the feeling of pressure on the occupant PA (sitting ability) Is an excellent structure).
In addition, the seat support can be maintained by firmly supporting the occupant PA at the second portion 14b (the portion having poor elasticity). At this time, in this embodiment, the second portion 14b is provided in the lower portion of the side portion 14 or the like. For this reason, when a load movement of the occupant PA occurs during cornering traveling or a vehicle collision, the support performance of the cushion material 6P can be suitably exhibited even if a pressing force of the occupant PA is applied to the lower portion of the side portion 14.

By the way, in the above-described seat configuration, the occupant's head may be swung back and forth due to the occupant PA being pressed against the seat at the time of a vehicle collision (particularly at the time of rearward collision of the vehicle) (see FIG. 4).
Therefore, in the present embodiment, the upper frame 6a and the first portion 14a are spaced apart by the gap 40. Then, the occupant PA is pressed against the seat back 6 by an impact at the time of a vehicle collision or the like, and the upper portion of the cushion material 6P is elastically contracted, and the gap portion 40 between the first portion 14a and the upper frame 6a is reduced. Thereby, the headrest 8 can be moved relative to the seating side of the seat back 6.
Thus, at the time of a vehicle collision, the upper part of the cushioning material 6P is elastically retracted, so that the head of the passenger can be quickly brought into contact with the headrest 8 (preferably suppressing the back-and-forth movement of the head).

As described above, in the present embodiment, the first portion 14a (the portion that can face the passenger shoulder) and the main portion 12 are more elastic than the second portion 14b, so that the seating property of the seat can be maintained well. Moreover, since the 2nd site | part 14b is hard to be elastically contracted rather than the 1st site | part 14a and the main part 12, the improvement of the support performance of the cushioning material 6P can be aimed at.
In this embodiment, when the vehicle collides, the headrest 8 can be moved relative to the seating side (swiftly brought into contact with the occupant's head) to suitably prevent or reduce the anteroposterior movement of the occupant's head (in support performance). Excellent configuration).
For this reason, according to the present embodiment, it is possible to improve the support performance of the cushioning material 6P while maintaining good seating performance.

The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments.
(1) In this embodiment, although the example which forms the clearance gap 40 between the upper frame 6a and the 1st site | part 14a was demonstrated, a clearance gap can also be abbreviate | omitted.
(2) Further, in the present embodiment, the configuration of the first part 14a has been exemplified, but it is not intended to limit the shape, the formation position, the number of formations, and the like of the first part.
(3) Moreover, in this embodiment, a main part and a side part (a 1st site | part and a 2nd site | part) can be shape | molded simultaneously at the time of shaping | molding of a cushioning material. Further, after the main part and the side part are separately formed, both parts can be connected.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 6P Cushion Material 6F Frame Member 6S Skin Material 12 Main Part 14 Side Part 14a First Part 14b Second Part 16 Backing Material 40 Clearance Part PA Crew

Claims (2)

A frame that has a seat cushion, a seat back that is connected to the seat cushion in a tiltable manner, and that the seat back forms a seat outer shape and can elastically support an occupant, and a seat skeleton has a member, headrest, said the vehicle seat is configured that is disposed in the seat back upward in a state attached to said frame member,
The cushion material has a main part that can face the occupant body part, and a side part that is disposed on the side of the main part and protrudes to the seating side of the seat back,
Based on the seat back in an upright state, the side part is disposed on the upper part of the side part and can face the occupant shoulder part, and the second part constituting the side part other than the first part And the first part and the main part are configured to be more elastic than the second part,
Said being the arrangement cushion material on the frame member in a state where the gap portion is provided between the frame member and the first portion, the gap portion, Hekomase toward the first portion to the seating side Formed by separating from the frame member,
At impact such as a vehicle collision occupant is pressed against the seat back, by the cushion member upper is a state of being Tamachijimi, reducing the clearance between the first portion and the frame member Accordingly, the vehicle seat is configured such that the headrest moves relatively to the seat back side of the seat back.   The vehicle seat according to claim 1, wherein the second portion under the side portion is disposed in contact with the frame member.

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