JP7053354B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a pressure receiving member in the seat back that can move backward while receiving a load from the back of an occupant.

Among the vehicle seats, there is a seat having a pressure receiving member in the seat back that can move backward while receiving a load from the back of the occupant. When a vehicle (for example, a vehicle) collides with the rear surface of the pressure receiving member, the pressure receiving member receives a rear load from the back of the occupant and moves (displaces) rearward. Such movement of the pressure receiving member makes it possible to reduce the load (impact load) applied to the occupant at the time of a collision.

On the other hand, the shape and the like of the above-mentioned pressure receiving member have been improved so that the load input from the back of the occupant can be effectively received. Specifically, for example, the pressure receiving member (“backrest panel” in Patent Document 1) provided in the seat back of the vehicle seat described in Patent Document 1 has a long width in the vertical direction (a portion having a long width in the vertical direction). The wide part) and the short part (narrow part) are arranged alternately. With such a configuration, it is possible to reduce the weight of the pressure receiving member by the amount that the width in the narrow portion is shorter than the width in the wide portion. Further, in the pressure receiving member having a structure in which wide portions and narrow portions are alternately arranged, the side end portions thereof tend to bend, and as a result, it becomes easy to fit (follow) the back of the occupant when supporting the back of the occupant.

Japanese Unexamined Patent Publication No. 2010-173333

However, in the configuration of the pressure receiving member described in Patent Document 1, the side end portion of the portion having a longer width (that is, the wide portion) tends to bend, but the rigidity of the side end portion is reduced. There is a risk.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat capable of ensuring the flexibility and rigidity of the pressure receiving member.

According to the vehicle seat of the present invention, the subject is a vehicle seat provided with a seat back that supports the back of the occupant, and the inside of the seat back is rearward with a load from the back of the occupant. A movable pressure receiving member is provided, and the pressure receiving member has a load receiving portion that receives a load from the back of an occupant on the front surface, and the load receiving portion has a length in the vertical direction of the seat back. A load receiving portion piece formed so as to be shorter than the length in the width direction of the vehicle seat, and protruding from the load receiving portion piece along the thickness direction of the load receiving portion, along the width direction. It is provided with an extended reinforcing portion, and a groove-shaped recess formed by being recessed rearward is provided on the front surface of the load receiving portion piece, and the reinforcing portion is provided on the rear surface of the load receiving portion piece. The problem is solved by providing the groove-shaped recess in the portion where the groove-shaped recess is provided .

In the vehicle seat configured as described above, a horizontally long load receiving portion piece is provided on the load receiving portion of the pressure receiving member. Further, the load receiving portion piece is provided with a reinforcing portion that protrudes from the load receiving portion piece and extends along the sheet width direction. This makes it possible to improve the rigidity of the load receiving portion piece by the reinforcing portion while ensuring the flexibility of the load receiving portion piece.

Further, to describe a suitable configuration for the vehicle seat, the reinforcing portion is a portion of the rear surface of the load receiving portion piece that is most raised rearward among the portions provided with the groove-shaped recesses. It is good that it is provided in.
In the above configuration, in the rear surface of the load receiving portion piece, the reinforcing portion is provided in the portion that is most raised rearward among the portions provided with the groove-shaped recesses. With such a configuration, it is possible to prevent the bending deformation from being hindered by the reinforcing portion when the portion of the load receiving portion piece provided with the groove-shaped recess is bent.
Further, to describe a suitable configuration for the vehicle seat, it is preferable that the reinforcing portion is provided on the rear surface of the load receiving portion piece.
In the above configuration, since the reinforcing portion is provided on the rear surface of the load receiving portion piece (that is, the surface opposite to the side receiving the load from the back of the occupant), the reinforcing portion is reinforced while exerting the reinforcing effect. It is possible to suppress the part from affecting the riding comfort of the seat.

Further, to describe a suitable configuration for the vehicle seat, it is preferable that the reinforcing portion is provided at the central portion of the load receiving portion piece in the vertical direction.
In the above configuration, since the reinforcing portion is provided at the center of the load receiving portion piece in the vertical direction of the seat, the rigidity of the load receiving portion piece can be improved in a well-balanced manner in the vertical direction of the seat.

Further, to describe a suitable configuration for the vehicle seat, the load receiving portion piece is provided with a cross reinforcing portion which is arranged at a position different from the reinforcing portion and intersects with the reinforcing portion. The cross reinforcing portion may project in the thickness direction of the load receiving portion and extend along the vertical direction.
In the above configuration, the cross reinforcing portion is further provided on the load receiving portion piece together with the reinforcing portion. This makes it possible to further improve the rigidity of the load receiving portion piece.

Further, to describe a suitable configuration for the vehicle seat, the protruding amount of the reinforcing portion may be larger than the protruding amount of the cross reinforcing portion.
In the above configuration, the protruding amount of the reinforcing portion is larger than the protruding amount of the cross reinforcing portion, so that the reinforcing effect of the reinforcing portion (that is, the strengthening of the rigidity in the seat width direction) is more effectively exhibited. Become.

Further, to describe a suitable configuration for the vehicle seat, the seat back includes a seat back frame, and the pressure receiving member has a mounting portion for mounting the load receiving portion to the seat back frame. The mounting portion includes a lower mounting portion connected to the lower portion of the seat back frame, and the reinforcing portion is arranged so as to approach the position where the lower mounting portion is provided in the width direction. good.
In the above configuration, the reinforcing portion is arranged so that the reinforcing portion comes to the position where the lower mounting portion is provided in the mounting portion for mounting the load receiving portion to the seat back frame. With such a configuration, the support performance of the load receiving portion by the lower mounting portion is improved, and as a result, the load receiving portion can be appropriately mounted on the seat back frame.

Further, to describe a suitable configuration for the vehicle seat, the seat back includes a seat back frame, and the pressure receiving member has a mounting portion for mounting the load receiving portion to the seat back frame. The mounting portion includes an upper mounting portion connected to the upper part of the seat back frame, and the reinforcing portion is arranged at a position deviating from the position where the upper mounting portion is provided in the width direction. good.
In the above configuration, a reinforcing portion is provided at a position separated from the upper mounting portion in the mounting portion for mounting the load receiving portion on the seat back frame. This makes it possible to improve the rigidity of the load receiving portion piece without preventing the upper mounting portion from being deformed (bent) so that the pressure receiving member moves rearward when the vehicle collides with the rear surface.

Further, to describe a suitable configuration for the vehicle seat, the amount of protrusion of the reinforcing portion may be larger than the depth of the groove-shaped recess.
In the above configuration, the amount of protrusion of the reinforcing portion is larger than the depth of the groove-shaped recess, so that the reinforcing effect of the reinforcing portion can be more effectively exerted by that amount.

Further, to describe a suitable configuration for the vehicle seat, the load receiving unit pieces are provided in a plurality of spaces at intervals in the vertical direction, and the plurality of load receiving unit pieces are the first load receiving unit pieces. It has a portion piece and a second load receiving portion piece shorter than the first load receiving portion piece in the width direction, and each of both ends of the reinforcing portion in the width direction is said to be said in the width direction. It is preferable that it is located outside the second load receiving piece.
In the above configuration, both ends of the reinforcing portion in the seat width direction are located outside the seat width direction with respect to the second load receiving portion piece. That is, the length of the reinforcing portion in the seat width direction is longer than the length of the second load receiving portion piece. As a result, the reinforcing effect of the reinforcing portion can be more effectively exhibited.

According to the vehicle seat of the present invention, it is possible to improve the rigidity of the load receiving portion piece by the reinforcing portion while ensuring the flexibility of the load receiving portion piece.
Further, according to the vehicle seat of the present invention, since the reinforcing portion is provided on the rear surface of the load receiving portion piece, the reinforcing portion affects the riding comfort of the seat while exerting the reinforcing effect of the reinforcing portion. It becomes possible to suppress.
Further, according to the vehicle seat of the present invention, the rigidity of the load receiving portion piece can be improved in a well-balanced manner in the vertical direction of the seat.
Further, according to the vehicle seat of the present invention, when the portion of the load receiving portion piece provided with the groove-shaped recess is bent, it is possible to suppress the bending deformation from being hindered by the reinforcing portion. Will be.
Further, according to the vehicle seat of the present invention, since the cross reinforcing portion is further provided on the load receiving portion piece together with the reinforcing portion, the rigidity of the load receiving portion piece can be further improved.
Further, according to the vehicle seat of the present invention, the reinforcing effect of the reinforcing portion is more effectively exhibited because the protruding amount of the reinforcing portion is larger than the protruding amount of the cross reinforcing portion.
Further, according to the vehicle seat of the present invention, the support performance of the load receiving portion is improved for the lower mounting portion of the mounting portion for mounting the load receiving portion to the seat back frame, and as a result, the load receiving portion is the seat back frame. Will be properly attached to.
Further, according to the vehicle seat of the present invention, when the vehicle collides with the rear surface and the pressure receiving member moves rearward, the upper mounting portion of the mounting portion for mounting the load receiving portion to the seat back frame is deformed. It is possible to improve the rigidity of the load receiving portion piece without hindering the above.
Further, according to the vehicle seat of the present invention, the amount of protrusion of the reinforcing portion is larger than the depth of the groove-shaped recess, so that the reinforcing effect of the reinforcing portion can be more effectively exhibited.
Further, according to the vehicle seat of the present invention, since the length of the reinforcing portion in the seat width direction is longer than the length of the second load receiving portion piece, the reinforcing effect of the reinforcing portion is more effectively exhibited. Become so.

It is a perspective view of the vehicle seat which concerns on one Embodiment of this invention. It is a figure which shows the seat frame of the vehicle seat which concerns on one Embodiment of this invention. It is a figure which looked at the pressure receiving member which concerns on one Embodiment of this invention from the diagonal front. It is a figure which looked at the pressure receiving member which concerns on one Embodiment of this invention from the diagonal rear. It is a figure which looked at the pressure receiving member which concerns on one Embodiment of this invention from the front. FIG. 5 is an enlarged view showing a first load receiving portion piece and a second load receiving portion piece included in the load receiving portion in the pressure receiving member shown in FIG. 5. It is a figure which shows the cross section AA in FIG. It is a figure which shows the pressure receiving member at the time of cutting in the BB plane in FIG. FIG. 4 is an enlarged view showing a first load receiving portion piece and a second load receiving portion piece included in the load receiving portion in the illustrated pressure receiving member.

<< About the configuration example of the vehicle seat of the present invention >>
Hereinafter, the configuration of the vehicle seat according to the embodiment of the present invention (the present embodiment) will be described with reference to the drawings. However, the embodiments described below are for facilitating the understanding of the present invention, and do not limit the present invention. That is, the present invention can be modified or improved without departing from the spirit of the present invention. Also, of course, the present invention may include an equivalent thereof.

In the following, as an example of a vehicle seat, a vehicle seat mounted on a vehicle such as an automobile will be mentioned, and a configuration example thereof will be described. However, the present invention can be applied to vehicle seats other than vehicle seats, for example, seats mounted on ships and aircraft.

Further, in the following description, the "front-rear direction" is the front-rear direction of the vehicle seat, and is a direction that coincides with the traveling direction when the vehicle is traveling. Further, the "seat width direction" is the width direction of the vehicle seat, which is the direction corresponding to the left-right direction seen from the occupant seated on the vehicle seat. Further, the "seat vertical direction" is a direction from the upper end to the lower end of the seat back S1, which will be described later, with respect to the height direction of the vehicle (the direction corresponding to the vertical direction when the vehicle is traveling on the horizontal plane). The direction is slightly tilted.

Further, in the following description, the "horizontal width" means the length in the seat width direction, and the "vertical width" means the length in the vertical direction of the seat.

Regarding the shape, position, posture, etc. of each part of the seat described below, unless otherwise specified, the vehicle seat is in the normal use state (the vehicle seat is in a position where it can be seated, and each part is in the initial position. The explanation will be made assuming the case of being placed).

First, the basic configuration of the vehicle seat (hereinafter referred to as the vehicle seat S) according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the vehicle seat S. FIG. 2 is a diagram showing a seat frame forming the skeleton of the vehicle seat S. In FIG. 2, the seat frame is shown in a simplified manner, and some configurations in the pressure receiving member 10 (for example, the groove-shaped recess 13 and the reinforcing ribs described later) are not shown.

The vehicle seat S has substantially the same configuration as a general vehicle seat except that it includes a pressure receiving member 10 described later. Specifically, as shown in FIG. 1, the vehicle seat S includes a seat back S1 that supports the back of the occupant, a seat cushion S2 that supports the buttocks of the occupant, and a headrest S3 that supports the head of the occupant. Be prepared.

Further, the seat back S1 has a seat back frame 1 and a pressure receiving member 10 inside the seat back S1. The seat back frame 1 forms the skeleton of the seat back S1. The seat back frame 1 has a substantially rectangular frame when viewed from the front, and has a side frame 2, an upper frame 3, and a lower member frame 4 as shown in FIG. A pair of side frames 2 are provided at positions separated from each other in the seat width direction. The upper frame 3 connects the upper ends of the pair of left and right side frames 2. The lower member frame 4 is erected between the lower ends of the pair of left and right side frames 2.

A cushion pad (not shown) is arranged in front of the seat back frame 1 configured as described above, and the surface of the cushion pad is covered with a skin to form the seat back S1. Further, as shown in FIG. 2, a pressure receiving member 10 is provided in the seat back S1. The pressure receiving member 10 is a member that receives a load input from the back of the occupant on the front surface. Further, when a vehicle on which the vehicle seat S is mounted collides with the rear surface, when a load (impact load) is input to the pressure receiving member 10 from the back of the occupant, the pressure receiving member 10 is pushed by the back of the occupant together with the occupant. Move (displace) backward. Due to such displacement of the pressure receiving member 10, the load (impact load) applied to the neck of the occupant at the time of collision is reduced.

Hereinafter, the configuration of the pressure receiving member 10 will be described in detail with reference to FIGS. 2 and 3 to 9 described above. 3 to 5 are views showing the appearance of the pressure receiving member 10, FIG. 3 is a view of the pressure receiving member 10 viewed diagonally from the front, and FIG. 4 is a view of the pressure receiving member 10 viewed diagonally from the rear. , FIG. 5 is a view of the pressure receiving member 10 as viewed from the front (front). FIG. 6 is an enlargement of a part of the pressure receiving member 10 shown in FIG. 5 (specifically, the first load receiving portion piece 12a and the second load receiving portion piece 12b provided in the upper receiving portion 11U described later). It is a figure shown by. FIG. 7 is a diagram showing a cross section taken along the line AA in FIG. FIG. 8 is a diagram showing a pressure receiving member 10 when cut on the BB plane in FIG. FIG. 9 is an enlargement of a part of the pressure receiving member 10 shown in FIG. 4 (specifically, the first load receiving portion piece 12a and the second load receiving portion piece 12b provided in the upper receiving portion 11U described later). It is a figure shown by.

As described above, the pressure receiving member 10 is configured to be movable rearward while receiving a load from the back of the occupant. Further, as shown in FIG. 2, the pressure receiving member 10 is arranged behind the cushion pad constituting the seat back S1. More specifically, the pressure receiving member 10 is arranged in a rectangular space surrounded by a pair of left and right side frames 2, an upper frame 3, and a lower member frame 4.

The pressure receiving member 10 is symmetrically configured with the center in the seat width direction as a boundary, and has a load receiving portion 11 and a mounting wire 20 as shown in FIGS. 3 to 5. The load receiving portion 11 is a portion that receives a load from the back of an occupant, and is configured by molding a resin plate (plate-shaped member) into the shape shown in FIGS. 3 and 4.

The mounting wire 20 functions as a mounting portion for mounting the load receiving portion 11 to the seat back frame 1, is configured by bending a metal wire into a predetermined shape, and is assembled to the load receiving portion 11. In this embodiment, the mounting wire 20 is integrally molded with the load receiving portion 11 by insert molding. That is, a part of the mounting wire 20 (mainly a part of the vertically extending portion 23 described later) is embedded in the resin plate constituting the load receiving portion 11.
Hereinafter, the configurations of the load receiving portion 11 and the mounting wire 20 will be described.

<Structure of load receiving part>
As described above, the load receiving portion 11 is composed of a resin plate. As shown in FIGS. 3 to 5, the load receiving portion 11 of the present embodiment is divided into an upper portion (hereinafter, upper receiving portion 11U) and a lower portion (hereinafter, lower receiving portion 11L). As shown in FIG. 5, the lower receiving portion 11L is a portion having a rectangular shape when viewed from the front, and supports a portion of the back of the occupant, which mainly corresponds to the lumbar region, at the time of a rear collision of the vehicle.

As shown in FIG. 5, the upper receiving portion 11U is a portion having a shape imitating the rib shape of the human body, and supports a portion of the back of the occupant, which mainly corresponds to the thoracic vertebrae, at the time of a rear collision of the vehicle. The lower end of the upper receiving portion 11U is connected to the upper end of the lower receiving portion 11L via the connecting portion 19. The connecting portion 19 has a shape in which the width thereof is sufficiently shorter than the width of the upper receiving portion 11U and the lower receiving portion 11L, and is located at positions separated from each other in the seat width direction (in the present embodiment). 2) are provided.

Explaining the configuration of the upper receiving portion 11U, the upper receiving portion 11U has a load receiving portion piece 12 which is an elongated portion long in the seat width direction. The load receiving portion piece 12 is formed so that the vertical width is sufficiently shorter than the horizontal width, and in the present embodiment, it is formed in an oval shape as shown in FIG. The upper receiving portion 11U is provided with a plurality of load receiving portion pieces 12 (five in the present embodiment) at intervals in the vertical direction of the sheet. The shape and number of the load receiving portions 12 are not limited to the above contents, and can be freely designed as long as the load receiving portions 11 can satisfactorily exert their functions. be.

Among the plurality of load receiving portion pieces 12, the load receiving portion piece 12 located at the uppermost position and the other load receiving portion pieces 12 have different shapes. More specifically, the load receiving portion piece 12 other than the load receiving portion piece 12 located at the uppermost position corresponds to the first load receiving portion piece 12a. The lateral width of each first load receiving portion piece 12a is uniform among the first load receiving portion pieces 12a. On the other hand, the load receiving portion piece 12 located at the uppermost position corresponds to the second load receiving portion piece 12b. As shown in FIGS. 5 and 6, the width of the second load receiving portion piece 12b is shorter than the width of the first load receiving portion piece 12a.

Of the upper receiving portion 11U, the portion located above the second load receiving portion piece 12b (hereinafter, the upper end portion of the upper receiving portion 11U) has a substantially trapezoidal shape in front view as shown in FIG. The width thereof is slightly shorter than the width of the second load receiving portion piece 12b.

Further, each of the plurality of load receiving portion pieces 12 is slightly bent with respect to the seat width direction so as to satisfactorily support the back of the occupant. Specifically, as shown in FIG. 7, each of both ends of the load receiving portion piece 12 in the sheet width direction (hereinafter referred to as the end portion 12t in the sheet width direction) is in the end portion 12t in the sheet width direction in the sheet width direction. The portion located on the outside is bent so as to be located in front of the portion located on the inside in the seat width direction. That is, a bent portion 12x exists at the end portion 12t in the sheet width direction of each load receiving portion piece 12.

Further, as shown in FIGS. 5 and 6, each of the plurality of load receiving portion pieces 12 is provided with a groove-shaped recess 13 formed long along the sheet width direction. The groove-shaped recess 13 is formed by recessing the central portion of the front surface of the load receiving portion piece 12 in the vertical direction of the seat to the rear. In other words, of the rear surface of the load receiving portion piece 12, the central portion in the vertical direction of the seat is raised with the formation of the groove-shaped concave portion 13 to form the raised portion 12r. As shown in FIG. 8, the raised portion 12r is raised in a substantially arc shape in a lateral view.

The groove-shaped recess 13 is continuously formed from one end to the other end of the load receiving portion piece 12 in the sheet width direction. The opening of the groove-shaped recess 13 is provided on the front surface of the load receiving portion piece 12, and has an oval shape as shown in FIG. Further, in the present embodiment, the width of the opening of the groove-shaped recess 13 is one size smaller than the width of the load receiving portion piece 12 on which the groove-shaped recess 13 is formed, and the width of the opening of the groove-shaped recess 13 is one size smaller. The vertical width is about half the vertical width of the load receiving portion piece 12 in which the groove-shaped recess 13 is formed.

Further, the size (horizontal width and vertical width) of the groove-shaped recess 13 formed in the first load receiving portion piece 12a is uniform among the first load receiving portion pieces 12a. On the other hand, the lateral width of the groove-shaped recess 13 formed in the second load receiving portion piece 12b is slightly shorter than the lateral width of the groove-shaped recess 13 formed in the first load receiving portion piece 12a.

Further, a groove-shaped recess 13 is also provided in the portion of the load receiving portion 11 located directly above the second load receiving portion piece 12b, that is, the upper end portion of the load receiving portion 11. The groove-shaped recess 13 provided in the upper end portion of the load receiving portion 11 extends from one end to the other end in the sheet width direction of the upper end portion.

Further, the load receiving portion 11 is provided with three types of reinforcing ribs formed to increase the rigidity of the load receiving portion 11. Specifically, on the front surface of the load receiving portion 11, as shown in FIGS. 5 and 6, a reinforcing rib protruding forward from the load receiving portion piece 12 along the thickness direction of the load receiving portion 11 (hereinafter referred to as a reinforcing rib). A front reinforcing rib 16) is provided. Further, on the rear surface of the load receiving portion 11, as shown in FIG. 9, a reinforcing rib (hereinafter referred to as a rear reinforcing rib 17) protruding rearward from the load receiving portion piece 12 along the thickness direction of the load receiving portion 11 is provided. It is provided. Further, on the rear surface of the load receiving portion 11, a reinforcing rib (hereinafter referred to as a cross reinforcing rib 18) that intersects the rear reinforcing rib 17 is provided.

As described above, in the present embodiment, the front reinforcing rib 16, the rear reinforcing rib 17, and the cross reinforcing rib 18 are provided on each load receiving portion piece 12. As a result, the load receiving portion piece 12 is provided to ensure the ease of bending of the load receiving portion 11 (strictly speaking, the ease of bending in the load receiving portion piece 12) and to secure the rigidity of the load receiving portion piece 12. It is also possible.
Each reinforcing rib will be described in detail later.

Further, the load receiving portion 11 has a connecting portion 14 arranged between the load receiving portion pieces 12 in the vertical direction of the seat. The connecting portion 14 is a portion that connects between the load receiving portion pieces 12 in the vertical direction of the seat. Of the connecting portions 14, the connecting portion 14 that connects between the first load receiving portion pieces 12a has a rectangular shape having a relatively short width, and in the present embodiment, the seat width is as shown in FIG. A pair is provided at positions separated from each other in the direction. On the other hand, the connecting portion 14 connecting between the first load receiving portion piece 12a and the second load receiving portion piece 12b has a strip shape having a relatively long width, and the first load receiving portion It is provided so as to connect the central portion of each of the piece 12a and the second load receiving portion piece 12b in the seat width direction.

A plurality of connecting portions 14 for connecting the first load receiving portion pieces 12a to each other are provided according to the number of gaps between the first load receiving portion pieces 12a. Each of the plurality of connecting portions 14 (connecting portions 14 connecting the first load receiving portion pieces 12a to each other) are arranged at the same positions in the seat width direction, and are arranged in a straight line as shown in FIG. I'm out.

Further, the load receiving portion 11 is provided with a through hole 15 formed for reducing the weight of the load receiving portion 11. The through hole 15 is a hole having a substantially rectangular shape in the front view through the load receiving portion 11 in the thickness direction of the load receiving portion 11. In the present embodiment, the through hole 15 is provided at a position separated from the load receiving portion piece 12 in the vertical direction of the seat, and specifically, is provided in the connecting portion 14 as shown in FIGS. 5 and 6. There is. More specifically, through holes 15 are formed in each of the pair of left and right connecting portions 14 connecting between the first load receiving portion pieces 12a. Further, the connecting portions 14 connecting between the first load receiving portion piece 12a and the second load receiving portion piece 12b are provided with a plurality of (two in the present embodiment) at different positions in the seat width direction. Has been done.

In this embodiment, as shown in FIG. 5, the formation positions of the through holes 15 in the sheet width direction are aligned between the load receiving portion pieces 12. More specifically, among the pair of left and right connecting portions 14 connecting between the first load receiving portion pieces 12a, the through hole 15 provided in the connecting portion 14 on the left side (one end side in the seat width direction) is , In the seat width direction, the left side (seat) of the pair of left and right through holes 15 formed in the connecting portion 14 connecting between the first load receiving portion piece 12a and the second load receiving portion piece 12b. It is formed at the same position as the through hole 15 (on one end side in the width direction). Similarly, of the pair of left and right connecting portions 14 connecting between the first load receiving portion pieces 12a, the through hole 15 provided in the connecting portion 14 on the right side (the other end side in the seat width direction) is a through hole 15. In the seat width direction, the right side (seat width) of the pair of left and right through holes 15 formed in the connecting portion 14 connecting between the first load receiving portion piece 12a and the second load receiving portion piece 12b. It is formed at the same position as the through hole 15 (on the other end side in the direction).

Next, the various reinforcing ribs described above will be described in detail.
The front reinforcing rib 16 is formed on the front surface of the load receiving portion piece 12, and extends along the vertical direction of the seat as shown in FIG. In the present embodiment, the front reinforcing rib 16 is made of the same material as the portion other than the front reinforcing rib 16 in the resin plate forming the load receiving portion 11, and is formed so as to be integrated with the portion other than the front reinforcing rib 16. ing. That is, the front reinforcing rib 16 is integrally molded together with other portions (parts other than the front reinforcing rib 16) when the resin plate forming the load receiving portion 11 is molded.

A plurality of front reinforcing ribs 16 are provided on each of the plurality of load receiving portion pieces 12, and specifically, a plurality of front reinforcing ribs 16 are arranged so as to be arranged along the seat width direction. More specifically, a plurality of front reinforcing ribs 16 are provided at intervals so as to form a row from one end to the other end of the load receiving portion piece 12 in the seat width direction. Further, in the present embodiment, the front reinforcing ribs 16 are arranged so as to be symmetrical with respect to the center of the load receiving portion 11 in the seat width direction. The number of front reinforcing ribs 16 is not particularly limited, and can be set to any number (however, at least two or more are desirable).

Further, as shown in FIG. 5, the formation positions of the plurality of front reinforcing ribs 16 provided on each load receiving portion piece 12 are aligned between the load receiving portion pieces 12. Specifically, of the two load receiving portion pieces 12 adjacent to each other in the vertical direction of the seat, each of the plurality of front reinforcing ribs 16 provided on one of the load receiving portion pieces 12 (to be easy to understand, the upper side). , Each of the plurality of front reinforcing ribs 16 provided on the other load receiving portion piece 12 (for easy understanding, the lower side) is arranged so as to be aligned at the same position in the seat width direction. In other words, among the plurality of front reinforcing ribs 16 provided on each load receiving portion piece 12, the front reinforcing ribs 16 arranged at predetermined positions in the seat width direction are arranged so as to be aligned in a straight line at the predetermined positions. ing.

Further, the number of front reinforcing ribs 16 provided on the first load receiving portion piece 12a is the same among the first load receiving portion pieces 12a. Further, the number of front reinforcing ribs 16 provided on the first load receiving portion piece 12a is larger than the number of front reinforcing ribs 16 provided on the second load receiving portion piece 12b. Here, among the front reinforcing ribs 16 provided on the first load receiving portion piece 12a, the front reinforcing ribs 16 arranged at the end portions in the seat width direction are from the second load receiving portion piece 12b in the seat width direction. Is also in the outer position. That is, in the present embodiment, the front reinforcing rib 16 is arranged at a position outside the second load receiving portion piece 12b in the seat width direction.

Further, as shown in FIGS. 5, 6 and 8, the front reinforcing rib 16 is arranged in the groove-shaped recess 13. In other words, the front reinforcing rib 16 provided in each load receiving portion piece 12 is housed in the groove-shaped recess 13 formed in each load receiving portion piece 12. Further, as shown in FIG. 8, the surface 12s located on the peripheral edge of the opening of the groove-shaped recess 13 in the load receiving portion piece 12 and the end of the front reinforcing rib 16 in the protruding direction of the front reinforcing rib 16 (that is, the tip 16a). Is at the same position in the thickness direction of the load receiving portion 11. That is, in the present embodiment, the surface 12s located on the peripheral edge of the opening and the surface of the tip 16a of the front reinforcing rib 16 are on the same surface, and the front reinforcing rib 16 is completely contained in the groove-shaped recess 13. ..

As shown in FIG. 5, the groove-shaped recess 13 provided at the upper end of the load receiving portion 11, that is, the groove-shaped recess 13 provided at a position directly above the second load receiving portion piece 12b is also on the front side. A reinforcing rib 16 is provided.

The rear reinforcing rib 17 is a reinforcing portion formed on the rear surface of the load receiving portion piece 12, and extends linearly along the seat width direction as shown in FIG. In the present embodiment, the rear reinforcing rib 17 is integrally molded together with other portions (parts other than the rear reinforcing rib 17) when the resin plate forming the load receiving portion 11 is molded.

One rear reinforcing rib 17 is provided for each of the plurality of load receiving portion pieces 12. Specifically, as shown in FIG. 8, the rear reinforcing rib 17 is provided at the center of each load receiving portion piece 12 in the vertical direction of the seat. It is provided. More precisely, the rear reinforcing rib 17 is the most rearwardly raised portion of the raised portions 12r (in other words, the portion provided with the groove-shaped concave portion 13) formed on the rear surface of each load receiving portion piece 12. It is provided in the part where it is.

Further, in the present embodiment, the rear reinforcing rib 17 projects longer than the depth of the groove-shaped recess 13 (the length in the thickness direction of the load receiving portion 11). That is, in the present embodiment, the amount of protrusion of the rear reinforcing rib 17 is larger than the depth of the groove-shaped recess 13.

Further, as shown in FIG. 9, the rear reinforcing rib 17 is continuously provided from one end to the other end in the sheet width direction of the raised portion 12r (in other words, the portion where the groove-shaped recess 13 is provided). It is provided.

The cross-reinforcing rib 18 corresponds to the cross-reinforcing portion, is formed on the rear surface of the load receiving portion 11, and extends linearly along the vertical direction of the seat. In the present embodiment, the cross reinforcing rib 18 is integrally molded together with other portions (parts other than the cross reinforcing rib 18) when the resin plate forming the load receiving portion 11 is molded.

The cross reinforcing rib 18 is arranged at a position different from that of the rear reinforcing rib 17 on the rear surface of the load receiving portion 11. Specifically, as shown in FIG. 9, the connecting portion 14 and each load receiving portion piece 12 In the middle, it is arranged in a portion adjacent to the connecting portion 14. The cross reinforcing rib 18 provided at such a position intersects (strictly speaking, substantially orthogonal to) the rear reinforcing rib 17. In the present embodiment, the cross reinforcing rib 18 extends sufficiently long along the vertical direction of the seat and intersects with all of the rear reinforcing ribs 17 provided in each of the plurality of load receiving portion pieces 12. There is.

Further, in the present embodiment, as shown in FIG. 9, a plurality of cross-reinforcing ribs 18 are formed. Specifically, two of the rear surfaces of the load receiving portion 11 are located near one end in the seat width direction. , Two are provided in the area from the other end in the seat width direction. The number of the cross reinforcing ribs 18 is not particularly limited, and can be set to any number.

Further, in the present embodiment, the cross reinforcing rib 18 protrudes by a protrusion amount shorter than the protrusion amount of the rear reinforcement rib 17. In other words, in the present embodiment, the protruding amount of the rear reinforcing rib 17 is larger than the protruding amount of the rear reinforcing rib 17.

<Mounting wire configuration>
The mounting wire 20 is assembled to the load receiving portion 11, and strictly speaking, a part thereof is inserted in the load receiving portion 11. As shown in FIGS. 2 to 5, the mounting wire 20 has an upper mounting portion 21, a lower mounting portion 22, and a vertical extending portion 23.

The upper mounting portion 21 is a portion connected to the upper frame 3 (upper portion) of the seat back frame 1 and is arranged above the load receiving portion 11. Further, as shown in FIG. 5, a pair of upper mounting portions 21 are provided at positions separated from each other in the seat width direction.

The lower mounting portion 22 is a portion connected to the lower member frame 4 (lower portion) of the seat back frame 1, and is arranged below the load receiving portion 11. The lower mounting portion 22 extends long in the seat width direction. Further, as shown in FIG. 5, a mounting clip 5 for mounting the pressure receiving member 10 (strictly speaking, the lower mounting portion 22 of the mounting wire 20) to the lower member frame 4 is mounted at the middle position of the lower mounting portion 22. Has been done.

The vertical extension portion 23 is located between the upper mounting portion 21 and the lower mounting portion 22, and is a portion extending along the vertical direction of the seat, and is assembled (inserted) in the load receiving portion 11. ing). Further, as shown in FIG. 5, a pair of vertical extending portions 23 are provided at positions separated from each other in the sheet width direction.

Further, as shown in FIG. 5, the vertical extending portion 23 is provided so as to pass through the through hole 15 formed in the load receiving portion 11. In other words, the vertical extension portion 23 is provided so that the range in which the through hole 15 is provided and the range in which the vertical extension portion 23 is arranged partially overlap in the seat width direction. .. The portion of the vertical extension portion 23 that has passed through the through hole 15 is exposed through the through hole 15 as shown in FIG. On the other hand, of the vertical extension portion 23, the portion inserted into the load receiving portion 11 vertically traverses the load receiving portion piece 12.

Further, the portion of the load receiving portion 11 into which the vertical extending portion 23 is inserted is inside the seat width direction end portion 12t of the load receiving portion piece 12, and more specifically, FIG. 7. As shown in the above, it is located slightly inside the bent portion 12x in the end portion 12t in the seat width direction.

<< Positional relationship between front reinforcing ribs and peripheral devices >>
Hereinafter, the positional relationship between the front reinforcing rib 16 and its peripheral device will be described with reference to FIGS. 5 to 7.
As shown in FIG. 5, the front reinforcing rib 16 is arranged at a position deviating from the position where the upper mounting portion 21 of the mounting wire 20 is provided in the seat width direction. Specifically, each of the plurality of front reinforcing ribs 16 provided on each load receiving portion piece 12 is located inside the upper mounting portion 21 in the seat width direction.

Further, as shown in FIG. 5, some of the plurality of front reinforcing ribs 16 provided on each load receiving portion piece 12 are provided with a lower mounting portion 22 of the mounting wire 20 in the seat width direction. It is located within the range. On the other hand, among the plurality of front reinforcing ribs 16, the front reinforcing rib 16 located on the outermost side in the seat width direction is located outside the lower mounting portion 22 in the seat width direction.

Further, as shown in FIGS. 5 and 6, in each load receiving portion piece 12, front reinforcing ribs 16 are arranged on both sides of a portion in which the vertically extending portion 23 is inserted. In other words, a plurality of front reinforcing ribs 16 are arranged so that the vertical extending portion 23 is located between the front reinforcing ribs 16 in the seat width direction. As shown in FIGS. 5 and 6, the front reinforcing ribs 16 located on both sides of the vertical extending portion 23 have the through holes 15 located between the front reinforcing ribs 16 in the seat width direction. Have been placed. In other words, the front reinforcing rib 16 is arranged at a position outside the range in which the through hole 15 is provided in the seat width direction.

Further, at least four or more front reinforcing ribs 16 are arranged in each load receiving portion piece 12. Further, the distance between the front reinforcing ribs 16 differs depending on the position of the front reinforcing ribs 16 in the seat width direction. Explaining the relationship between the distance between the front reinforcing ribs 16 and the positions of the front reinforcing ribs 16 with reference to FIG. 6, the gaps between the front reinforcing ribs 16 located on both sides of the vertical extending portion 23 are described. It is the widest. On the other hand, the front reinforcing rib 16 at the side position of the vertical extension portion 23, the front reinforcing rib 16 at the side position of the vertical extension portion 23, and the front side adjacent to each other on the opposite side of the vertical extension portion 23. The gap between the reinforcing rib 16 and the reinforcing rib 16 is the narrowest. As shown in FIG. 6, the distance between the front reinforcing ribs 16 arranged at a position farther from the vertical extending portion 23 than such a position becomes wider as the distance from the vertical extending portion 23 increases.

Further, as shown in FIG. 7, the front reinforcing rib 16 provided on each load receiving portion piece 12 is separated from the bent portion 12x in the seat width direction end portion 12t of the load receiving portion piece 12 in the seat width direction. It is placed in a position. Strictly speaking, the front reinforcing rib 16 located at the position closest to the bent portion 12x is arranged at a position slightly deviated from the bent portion 12x.

Further, as shown in FIG. 5, a plurality of front reinforcing ribs 16 are arranged within the range in which the connecting portion 14 is provided (excluding the range in which the through hole 15 is provided) in the seat width direction.

<< Positional relationship between backside reinforcing ribs and peripheral devices >>
Hereinafter, the positional relationship between the rear reinforcing rib 17 and its peripheral device will be described with reference to FIGS. 4 and 9.
As can be seen from FIGS. 4 and 9, the rear reinforcing rib 17 is arranged at a position deviating from the position where the upper mounting portion 21 of the mounting wire 20 is provided in the seat width direction. Specifically, the rear reinforcing ribs 17 formed on each load receiving portion piece 12 are located between the pair of left and right upper mounting portions 21 in the seat width direction.

Further, as can be seen from FIGS. 4 and 9, the rear reinforcing rib 17 is arranged so as to approach the position where the lower mounting portion 22 of the mounting wire 20 is provided in the seat width direction. More specifically, the rear reinforcing rib 17 provided on the first load receiving portion piece 12a is formed so that the lateral width thereof is longer than the lateral width of the lower mounting portion 22. Then, in the seat width direction, the lower mounting portion 22 is arranged between the positions of both ends of the rear reinforcing rib 17 provided on the first load receiving portion piece 12a. Further, the rear reinforcing rib 17 provided on the second load receiving portion piece 12b is formed so that the lateral width thereof is equal to the lateral width of the lower mounting portion 22. The lower mounting portion 22 is arranged so that the position of the rear reinforcing rib 17 provided on the first load receiving portion piece 12a and the position of the lower mounting portion 22 overlap in the seat width direction.

Further, as can be seen from FIGS. 4 and 9, the rear reinforcing rib 17 provided on the first load receiving portion piece 12a extends to the outside of the end position of the second load receiving portion piece 12b in the seat width direction. It is extended. That is, in the present embodiment, each of both ends of the rear reinforcing rib 17 provided on the first load receiving portion piece 12a in the seat width direction is located outside the second load receiving portion piece 12b in the seat width direction. are doing.

<< Positional relationship between cross-reinforcing ribs and peripheral devices >>
Hereinafter, the positional relationship between the cross reinforcing rib 18 and its peripheral device will be described with reference to FIG.
As shown in FIG. 9, the cross-reinforcing ribs 18 are arranged at both side positions of the pair of left and right vertical extending portions 23 included in the mounting wire 20. That is, in the present embodiment, the cross reinforcing ribs 18 are arranged at positions sandwiching the respective vertical extension portions 23 in the seat width direction. Of the pair of cross-reinforcing ribs 18 that sandwich the vertical extension portion 23, the cross-reinforcing ribs 18 located inside in the seat width direction extend from the upper end portion of the load receiving portion 11 as shown in FIG. The lower end thereof reaches the central portion (central portion in the vertical direction of the seat) of the lower receiving portion 11L of the load receiving portion 11.

1 Seat back frame 2 Side frame 3 Upper frame 4 Lower member frame 5 Mounting clip 10 Pressure receiving member 11 Load receiving part 11U Upper receiving part 11L Lower receiving part 12 Load receiving part piece 12a First load receiving part piece 12b Second load Receiving part piece 12r Raised part 12t Seat width direction end part 12s Surface located at the edge of the opening 12 x Bending point 13 Groove-shaped recess 14 Connecting part 15 Through hole 16 Front side reinforcing rib 16a Tip 17 Rear side reinforcing rib (reinforcing part)
18 Cross reinforcement rib (cross reinforcement part)
19 Contact part 20 Mounting wire (mounting part)
21 Upper mounting part 22 Lower mounting part 23 Vertical extension part S Vehicle seat (vehicle seat)
S1 Seat back S2 Seat cushion S3 Headrest

Claims (9)

A vehicle seat with a seat back that supports the back of the occupant.
The seat back is provided with a pressure receiving member that can move backward while receiving a load from the back of the occupant.
The pressure receiving member has a load receiving portion that receives a load from the back of the occupant on the front surface.
The load receiving portion is
A load receiving portion piece formed so that the length of the seat back in the vertical direction is shorter than the length in the width direction of the vehicle seat.
A reinforcing portion that protrudes from the load receiving portion piece along the thickness direction of the load receiving portion and extends along the width direction is provided .
A groove-shaped recess formed by denting rearward is provided on the front surface of the load receiving portion piece.
The reinforcing portion is a vehicle seat characterized in that the reinforcing portion is provided in a portion of the rear surface of the load receiving portion piece in which the groove-shaped recess is provided . The first aspect of the present invention, wherein the reinforcing portion is provided in the rearmost raised portion of the portion provided with the groove-shaped recess in the rear surface of the load receiving portion piece. Vehicle seat. The vehicle seat according to claim 1 or 2, wherein the reinforcing portion is provided at a central portion of the load receiving portion piece in the vertical direction. The load receiving portion piece is provided with a cross reinforcing portion which is arranged at a position different from the reinforcing portion and intersects with the reinforcing portion.
The vehicle seat according to any one of claims 1 to 3 , wherein the cross reinforcing portion projects in the thickness direction of the load receiving portion and extends in the vertical direction. The vehicle seat according to claim 4 , wherein the protruding amount of the reinforcing portion is larger than the protruding amount of the cross reinforcing portion. The seat back includes a seat back frame and
The pressure receiving member has a mounting portion for mounting the load receiving portion to the seat back frame.
The mounting portion comprises a lower mounting portion connected to the lower portion of the seat back frame.
The vehicle seat according to any one of claims 1 to 5 , wherein the reinforcing portion is arranged so as to approach a position where the lower mounting portion is provided in the width direction. The seat back includes a seat back frame and
The pressure receiving member has a mounting portion for mounting the load receiving portion to the seat back frame.
The mounting portion comprises an upper mounting portion connected to the upper portion of the seat back frame.
The vehicle seat according to any one of claims 1 to 6 , wherein the reinforcing portion is arranged at a position deviating from a position where the upper mounting portion is provided in the width direction. The vehicle sheet according to any one of claims 1 to 7 , wherein the amount of protrusion of the reinforcing portion is larger than the depth of the groove-shaped recess. A plurality of the load receiving portion pieces are provided at intervals in the vertical direction.
The plurality of load-bearing pieces include a first load-bearing piece and a second load-bearing piece that is shorter than the first load-bearing piece in the width direction.
The invention according to any one of claims 1 to 8 , wherein each of both ends of the reinforcing portion in the width direction is located outside the second load receiving portion piece in the width direction. Vehicle seat.

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