JP7598017B2 - Vehicle seats - Google Patents

Description

The present invention relates to a vehicle seat, and in particular to a vehicle seat that can absorb the shock applied to the seated occupant when an impact such as a collision occurs.

When a moving vehicle crashes head-on, the body of the occupant (passenger) seated in the seat may slide forward and downward on the surface of the seat while restrained by the seat belt, resulting in a "submarine phenomenon." As a technology for absorbing the shock that is applied to the occupant when such an impact occurs, Patent Document 1 describes a technology in which a shock absorbing member, which is an insert material made of a honeycomb structure, is provided below the seat cushion pad.

Japanese Utility Model Application Publication No. 58-161600

In order for the shock absorbing member of a vehicle seat to effectively absorb shock, the shock absorbing member needs to be properly supported from below.

The present invention was made in consideration of the above problems, and its purpose is to provide a vehicle seat that can properly support an impact absorbing member.

The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat equipped with a seat cushion, the seat cushion having a seat cushion pad and an impact absorbing member provided inside the seat cushion pad, the seat cushion pad having a first pad member and a second pad member arranged below the first pad member, the impact absorbing member being arranged on top of the second pad member, and the impact absorbing member being arranged in a position that avoids a recess formed in the second pad member .

In the vehicle seat of the present invention configured as described above, the shock absorbing member can be appropriately supported by the second pad member. Also, by avoiding the recess, the shock absorbing member can be appropriately supported by the second pad member.
Furthermore, the above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with a seat cushion, the seat cushion having a seat cushion pad and an impact absorbing member provided inside the seat cushion pad, the seat cushion pad having a first pad member and a second pad member arranged below the first pad member, the impact absorbing member being arranged on the second pad member, the second pad member having a plurality of recesses formed therein, and the impact absorbing member being arranged at a position between the plurality of recesses in the width direction of the vehicle seat.
In the vehicle seat of the present invention configured as described above, the shock absorbing member can be appropriately supported by the second pad member. Also, the shock absorbing member can be appropriately supported at a position between the multiple recesses formed in the second pad member.

In the above configuration, the impact absorbing member may be disposed on a flat portion of the second pad member.
In the above-described configuration, the flat portion of the second pad member can adequately support the impact absorbing member with its surface.

In the above configuration, the second pad member may include an inclined portion inclined from the front to the rear, and the impact absorbing member may be disposed on the inclined portion.
In the above-described configuration, by disposing the impact absorbing member on the inclined portion formed on the second pad member, it becomes possible to appropriately support the impact absorbing member along the input direction of the load.

In addition, in the above configuration, the second pad member may include a bracket for mounting a component, and the impact absorbing member may be positioned at a different position from the bracket in the width direction of the vehicle seat.
In the above configuration, it is possible to appropriately support the impact absorbing member at a position that avoids the bracket provided on the second pad member.

Furthermore, in the above configuration, the second pad member may include, as the bracket, a first bracket and a second bracket spaced apart from the first bracket in the width direction of the vehicle seat, and the impact absorbing member may be disposed between the first bracket and the second bracket in the width direction of the vehicle seat.
In the above configuration, it is possible to appropriately support the impact absorbing member at a position between the two brackets of the second pad member.

In the above configuration, the second pad member may be harder than the first pad member.
In the above-described configuration, the impact absorbing member can be firmly supported by the second pad member which is harder than the first pad member.

In the above configuration, the seat cushion may have a cover material that covers the seat cushion pad.
With the above-described configuration, it is possible to appropriately support the impact absorbing member in a vehicle seat including a seat cushion having a first pad member and a second pad member.
In the above configuration, it is preferable that a U-shaped wire is attached to the rear surface of the second pad member.

According to the vehicle seat of the present invention, the impact absorbing member can be appropriately supported by the second pad member.
Furthermore, according to the vehicle seat of the present invention, the impact absorbing member can be appropriately supported by the flat portion of the second pad member .
Furthermore , according to the vehicle seat of the present invention, the impact absorbing member can be appropriately supported by the second pad member by avoiding the recessed portion.
Furthermore, according to the vehicle seat of the present invention, it is possible to appropriately support the impact absorbing member at a position between the multiple recesses formed in the second pad member.
Furthermore, according to the vehicle seat of the present invention, by arranging the impact absorbing member on the inclined portion formed on the second pad member, it becomes possible to appropriately support the impact absorbing member in the direction in which the load is input.
Furthermore, according to the vehicle seat of the present invention, it is possible to appropriately support the impact absorbing member at a position that avoids the bracket provided on the second pad member.
Furthermore, according to the vehicle seat of the present invention, it is possible to appropriately support the impact absorbing member at a position between the two brackets of the second pad member.
Furthermore, according to the vehicle seat of the present invention, the impact absorbing member can be firmly supported by the second pad member which is harder than the first pad member.
Furthermore, according to the vehicle seat of the present invention, it is possible to appropriately support the impact absorbing member in the vehicle seat provided with the seat cushion having the first pad member and the second pad member.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention; FIG. 2 is a top view of the vehicle seat. This is a cross-sectional view taken along line AA in FIG. FIG. 4 is a top view of the first pad member. FIG. 4 is a bottom view of the first pad member. FIG. 4 is a top view of the second pad member. FIG. 4 is a bottom view of the second pad member.

The vehicle seat according to the embodiment of the present invention (hereinafter, the present embodiment) will be described below with reference to Figs. 1 to 7. As the vehicle seat according to the present embodiment, a rear seat for a vehicle mounted on a vehicle will be described as an example, but the vehicle seat is not limited to a rear seat for a vehicle mounted on a ground-traveling vehicle having wheels such as an automobile or train, and may be a front seat for a vehicle, a second-row seat of a three-row seat, or a seat mounted on an aircraft or ship that travels other than on the ground.

The embodiment described below is merely an example to facilitate understanding of the present invention, and is not intended to limit the present invention. In other words, the shape, dimensions, arrangement, etc. of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents.

In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" refers to the front-rear direction as seen by a person sitting in the vehicle seat, and is the same as the direction in which the vehicle travels. The "seat width direction" refers to the width direction of the vehicle seat, and is the same as the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" refers to the height direction of the vehicle seat, and is the same as the up-down direction as seen from the front of the vehicle seat.

[1. Configuration of the vehicle seat S]
The vehicle seat S according to this embodiment is a rear seat of an automobile capable of seating three persons, and has the appearance shown in Fig. 1. Note that in Fig. 1, a part of the vehicle seat S (specifically, a front corner portion of the seat cushion S1) is shown with the trim cover S12 removed for convenience of illustration.

The main components of a vehicle seat S are a seat cushion S1 that serves as the seating portion that supports the buttocks of the seated person, a seat back S2 that serves as the backrest that supports the back of the seated person, and a headrest S3 that is disposed on top of the seat back S2 and supports the head of the seated person.

The seat cushion S1 is constructed by covering a seat cushion pad S11 with a trim cover S12 (Figs. 1 and 3). The seat back S2 is constructed by placing a cushion pad (not shown) on a seat back frame (not shown) and covering it with a trim cover S12. The head rest S3 is formed by placing a pad material (not shown) on a core material (not shown) and covering it with a trim cover S12.

As shown in FIG. 2, the trim cover S12 of the seat cushion S1 is provided with a first hanging portion T1 (right hanging portion) that is provided on the right side of the seat cushion and extends in the fore-and-aft direction, and a second hanging portion T2 (left hanging portion) that is provided on the left side of the seat cushion and extends in the fore-and-aft direction.

In addition, as shown in FIG. 4, a first hanging groove t1 and a second hanging groove t2 are formed at positions corresponding to the first hanging portion T1 and the second hanging portion T2 of the first pad member of the seat cushion pad S11.

[2. Seat cushion S1 of this embodiment]
The seat cushion S1 of the vehicle seat S of this embodiment is mainly composed of a seat cushion pad S11 (the first pad member 10 and the second pad member 20), a trim cover S12, and an impact absorbing member 30 (FIG. 4). Specifically, the seat cushion S1 has the seat cushion pad S11 and the impact absorbing member 30 provided inside the seat cushion pad S11, and is composed by covering the seat cushion pad S11 with the trim cover S12.

As shown in FIG. 3, the seat cushion pad S11 is composed of a first pad member 10 and a second pad member 20 made of a material harder than the first pad member 10. The first pad member 10 is disposed on the second pad member 20. In other words, the first pad member 10 is supported from below by the second pad member 20.

(First pad member 10)
Here, the configuration of the first pad member 10 will be described. The first pad member 10 has a first front surface 10a and a first back surface 10b. The first pad member 10 is a cushioning member made of foamed resin such as urethane foam. As shown in Figures 4 and 5, the first pad member 10 has substantially the same shape as the upper surface of the seat cushion S1.

As shown in Figures 3 to 5, the bulge 11, which is the bottom surface of the first pad member 10 that bulges downward, serves as a portion that supports the occupant's buttocks. When the first pad member 10 is placed on the second pad member 20, the bottom surface of the bulge 11 fits into the opening 22 of the second pad member 20.

As shown in FIG. 4, a hanging hole 12 is formed in a part of the first hanging groove t1 and the second hanging groove t2 formed in the first surface 10a of the first pad member 10, and the skin end S12a of the trim cover S12 is pulled into the back surface side of the first pad member 10 through the hanging hole 12. As shown in FIG. 4, a rearward extending portion 14 extending rearward is formed behind the bulge portion 11 of the first pad member 10.

(Second pad member 20)
Next, a configuration of the second pad member 20 will be described. The second pad member 20 has a second front surface 20a and a second back surface 20b. The second pad member 20 is made of a foamed resin such as expanded polypropylene (EPP), and is a support member that supports the first pad member 10 from below.

As shown in FIG. 6, an opening 22 is formed on the second surface 20a (upper surface) of the second pad member 20 at a position opposite the seat surface on which the occupant sits. Then, as shown in FIG. 3 and FIG. 6, a downwardly recessed portion 26 is formed in front of the left and right openings 22. A plurality of recesses 26 are formed side by side in the width direction and the front-rear direction of the seat. In this way, by providing a plurality of recesses 26 in the second pad member 20, a space is formed between the recesses 26. This makes it possible to reduce the weight of the second pad member 20.

As shown in FIG. 6, a first bracket B1 and a second bracket B2 are attached to the rear surface 21 of the second pad member 20, behind the left and right openings 22. The brackets B1 and B2 are attached to the second pad member 20 by molding the second pad member 20 with the brackets B1 and B2 inserted into the mold for the second pad member 20.

As shown in Figures 2 and 3, brackets B1 and B2 have an embedded portion Ba embedded in the second pad member 20 and a protruding portion Bc protruding from the second pad member 20 toward the rear of the seat. The embedded portion Ba has a horizontal extension portion that extends horizontally and an inclined portion that is inclined from the horizontal extension portion, and a through hole Bb is formed in the inclined portion.

In this way, by forming the through hole Bb in the embedded portion Ba, the EPP constituting the second pad member 20 during insert molding is formed by entering the through hole Bb of the embedded portion Ba. Therefore, the brackets B1 and B2 are firmly fixed to the second pad member 20, and it is possible to prevent the brackets B1 and B2 from coming off the second pad member 20.

In addition, because the embedded portion Ba has an inclined portion that slopes downward, the embedded portion Ba can ensure its length without penetrating the second pad member 20. This strengthens the bond between the brackets B1 and B2 and the second pad member 20, making it possible to prevent the brackets B1 and B2 from coming loose from the second pad member 20. Electrical components such as an ECU and harnesses are attached to the protruding portions Bc of the brackets B1 and B2.

As shown in Figures 6 and 7, a U-shaped wire 27 is attached to the rear surface 21 of the second pad member 20. The wire 27 is a member for attaching the vehicle seat 1 including the second pad member 20 to the vehicle body.

As shown in Fig. 3 and Fig. 7, a skin locking portion 23 is formed around the opening 22 on the second back surface 20b side of the second pad member 20. As shown in Fig. 3, the skin end portion S12a of the trim cover S12 is locked to the skin locking portion 23 of the second pad member 20 through the hanging hole 12 of the first pad member 10 and the opening 22 of the second pad member 20.

As shown in FIG. 7, a plurality of locking portions 29 are formed on the outer edge of the second back surface 20b of the second pad member 20. Hooks provided on the outer edge of the trim cover S12 are inserted into the locking portions 29, thereby fixing the outer edge of the trim cover S12 to the second pad member 20.

As shown in FIG. 7, a guide groove 24 is formed on the second back surface 20b of the second pad member 20. The guide groove 24 is capable of housing a harness. The guide groove 24 is also connected to the opening 22, making it easy to arrange the harness toward the rear of the second pad member 20 through the opening 22 and the guide groove 24.

As shown in FIG. 7, the side of the second pad member 20 has a plurality of engagement recesses 28 cut out toward the inside of the seat. These engagement recesses 28 engage with the engagement protrusions 13 provided on the outer edge of the first pad member 10 shown in FIG. 5, thereby making it possible to prevent misalignment between the first pad member 10 and the second pad member 20.

[3. Features of the seat cushion S1]
The vehicle seat S is provided with a seat cushion S1 of this embodiment. The seat cushion S1 has a seat cushion pad S11 and an impact absorbing member 30 provided inside the seat cushion pad S11.

(Impact absorbing member 30)
3 and 6, the impact absorbing member 30 has a hollow shape surrounded by an upper surface 31 and a lower surface 32 in the vertical direction, a front surface 33a and a rear surface 33b in the front-rear direction, and a right side surface 34a and a left side surface 34b in the seat width direction. In addition, an inclined surface 31a that slopes downward toward the rear is formed on the upper surface 31 of the impact absorbing member 30.

The shock absorbing member 30 is a hollow blow molded product that is harder than the first pad member 10, which is a urethane pad, and is designed to collapse and absorb shock when a certain load is exceeded.

The seat cushion pad S11 has a first pad member 10 and a second pad member 20 arranged below the first pad member 10. The impact absorbing member 30 is arranged on the second pad member 20. In other words, the lower surface 32 of the impact absorbing member 30 is supported by the second pad member 20. Specifically, the impact absorbing member 30 is arranged between the first back surface 10b of the first pad member 10 and the second surface 20a of the second pad member 20. In the vehicle seat S of this embodiment configured in this manner, the second pad member 20 can appropriately support the impact absorbing member 30 from below.

As shown in FIG. 6, the impact absorbing member 30 in the center in the seat width direction is disposed on the flat portion 20c of the second surface 20a of the second pad member 20. Here, the flat portion 20c refers to a portion having a flat surface without any recesses or the like. With this configuration, the flat portion 20c of the second pad member 20 can adequately support the impact absorbing member 30 by its surface.

As shown in FIG. 3, at least a portion of the shock absorbing member 30 is disposed in a recess 26 formed in the second pad member 20. More specifically, the lower surface 32 of the shock absorbing member 30 is disposed in the recess 26 provided in the second pad member 20. With this configuration, the position of the shock absorbing member 30 relative to the second pad member 20 is stabilized, and the shock absorbing member 30 can be appropriately supported.

The shock absorbing member 30 is also positioned to avoid the recesses 26 and openings 22 formed in the second pad member 20. Specifically, the central shock absorbing member 30 in the seat width direction is positioned between the multiple recesses 26 in the seat width direction and in front of the openings 22. With this configuration, the shock absorbing member 30 can be appropriately supported by the second pad member 20 by avoiding the recesses 26 and openings 22.

In addition, multiple recesses 26 are formed in the second pad member 20, and the impact absorbing member 30 is disposed at a position between the multiple recesses 26 in the seat width direction. With this configuration, it is possible to properly support the impact absorbing member 30 at a position between the multiple recesses 26 formed in the second pad member 20.

The second pad member 20 also has an inclined portion 25 that slopes downward from the front to the rear, and the impact absorbing member 30 is disposed on the inclined portion 25. Specifically, the impact absorbing member 30 is disposed at a position that overlaps (is at) the inclined portion 25 in the seat width direction. With this configuration, by disposing the impact absorbing member 30 on the inclined portion 25 formed on the second pad member 20, it becomes possible to appropriately support the impact absorbing member 30 along the load input direction.

The second pad member 20 also includes a first bracket B1 and a second bracket B2 for mounting parts, and the impact absorbing member 30, which is located in the center in the seat width direction, is located at a different position from the first bracket B1 and the second bracket B2 (Figure 6). With this configuration, it is possible to properly support the impact absorbing member 30 at a position that avoids the first bracket B1 and the second bracket B2 of the second pad member 20.

The second pad member 20 also includes a first bracket B1 and a second bracket B2 spaced apart from the first bracket B1 in the seat width direction, and the shock absorbing member 30 is disposed between the first bracket B1 and the second bracket B2 in the seat width direction. With this configuration, it is possible to properly support the shock absorbing member 30 at a position between the two brackets included in the second pad member 20.

The second pad member 20 is preferably harder than the first pad member 10. Specifically, the first pad member 10 is a cushioning member made of a foamed resin such as urethane foam, and the second pad member 20 is a support member made of expanded polypropylene (EPP). With this configuration, the shock absorbing member 30 can be firmly supported by the second pad member 20, which is harder than the first pad member 10.

The seat cushion S1 also has a trim cover S12 that covers the seat cushion pad S11. This configuration makes it possible to properly support the impact absorbing member 30 in a vehicle seat S equipped with a seat cushion S1 having a first pad member 10 and a second pad member 20.

[4. Modifications]
The present invention is not limited to the above embodiment. For example, in the above embodiment, the shock absorbing member 30 in the center in the seat width direction is disposed at a position that avoids the recessed portion 26 in the seat width direction, but as long as most of the shock absorbing member 30 is disposed at a position that avoids the recessed portion 26 in the seat width direction, the shock absorbing member 30 may overlap the recessed portion 26 in the seat width direction.

The vehicle seat according to this embodiment has been described above using a vehicle seat as an example. There are no particular limitations on the use of the seat cushion according to this embodiment, so long as it is a seat cushion for a seat where an impact may be applied to a seat occupant, particularly a seat cushion for a seat where the lumbar region of the seat occupant may sink in when an impact occurs. For example, the seat cushion of the present invention can also be used as a seat cushion for a vehicle seat used in a vehicle other than a car.

S Vehicle seats (vehicle seats)
S1 Seat cushion S11 Seat cushion pad S12 Trim cover (skin material)
S12a Skin edge T1 First hanging portion (right side hanging portion)
T2 Second hanging part (left hanging part)
S2 Seat back S3 Headrest 10 First pad member 10a First surface 10b First back surface 11 Bulging portion 12 Hanging hole 13 Engagement protrusion 14 Rear extension t1 First hanging groove t2 Second hanging groove 20 Second pad member 20a Second surface 20b Second back surface 20c Flat portion 21 Rear portion 22 Opening 23 Cover fastening portion 24 Guide groove 25 Inclined portion 26 Recess 27 Wire 28 Engagement recess 29 Fastening portion B1 First bracket (bracket)
Ba: Buried portion Bb: Through hole Bc: Protruding portion B2: Second bracket (bracket)
30 Shock absorbing member 31 Upper surface 31a Inclined surface 32 Lower surface 33a Front surface 33b Rear surface 34a Right side surface 34b Left side surface

Claims (9)

A vehicle seat having a seat cushion,
The seat cushion includes a seat cushion pad and an impact absorbing member provided inside the seat cushion pad,
The seat cushion pad is
A first pad member;
A second pad member disposed below the first pad member,
The shock absorbing member is disposed on the second pad member ,
The vehicle seat according to claim 1, wherein the shock absorbing member is disposed at a position avoiding a recess formed in the second pad member . A vehicle seat having a seat cushion,
The seat cushion includes a seat cushion pad and an impact absorbing member provided inside the seat cushion pad,
The seat cushion pad is
A first pad member;
A second pad member disposed below the first pad member,
The shock absorbing member is disposed on the second pad member,
The second pad member has a plurality of recesses formed therein,
The vehicle seat , wherein the impact absorbing member is disposed at a position between the plurality of recesses in a width direction of the vehicle seat . 3. The vehicle seat according to claim 1, wherein the shock absorbing member is disposed on a flat portion of the second pad member. The second pad member has an inclined portion inclined from the front to the rear,
4. The vehicle seat according to claim 1, wherein the shock absorbing member is disposed on the inclined portion. The second pad member includes a bracket for mounting a component,
5. The vehicle seat according to claim 1 , wherein the shock absorbing member is disposed at a position different from the bracket in a width direction of the vehicle seat. The second pad member includes, as the bracket, a first bracket and a second bracket spaced apart from the first bracket in a width direction of the vehicle seat,
6. The vehicle seat according to claim 5 , wherein the impact absorbing member is disposed between the first bracket and the second bracket in a width direction of the vehicle seat. 7. The vehicle seat according to claim 1, wherein the second padding member is harder than the first padding member. 8. The vehicle seat according to claim 1 , wherein the seat cushion has a covering material that covers the seat cushion pad. 9. The vehicle seat according to claim 1, wherein a U-shaped wire is attached to a rear surface of the second pad member.