JP7037031B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of suppressing the sinking of the seated person's waist when an impact such as a collision occurs.

When a running vehicle collides forward, a submarine phenomenon may occur in which the body of the occupant (occupant) seated on the seat slides forward and downward on the surface of the seat while being restrained by the seat belt. .. As a measure for suppressing the submarine phenomenon, for example, as described in Patent Document 1, a vehicle seat provided with a pipe member for suppressing sinking under the front portion of the seat cushion is known. There is.

Japanese Unexamined Patent Publication No. 2004-34797

However, at the time of a frontal collision, when the occupant sinks, the pelvis rotates too much, which causes a compressive load on the spine, which may put a load on the occupant.

The present invention has been made in view of the above problems, and an object thereof is to appropriately control the behavior of the pelvis (lumbar region) of the seated person when an impact such as a collision occurs, and a compressive load is generated on the spine of the seated person. The purpose is to provide a vehicle seat that can prevent the vehicle from being squeezed.

According to the vehicle seat of the present invention, the subject is a vehicle seat provided with a seat cushion, wherein the seat cushion includes a seat cushion frame and a cushion pad placed on the seat cushion frame. A high-hardness portion having a hardness higher than that of the material of the cushion pad provided below the cushion pad, and the high-hardness portion is provided on the seat cushion frame or the vehicle body in the vertical direction of the vehicle seat. It is arranged so as to overlap at least a part of the sinking suppressing member for suppressing the sinking of the seated person provided, and the sinking suppressing member is arranged below the high hardness portion. The seat cushion frame has a pan frame at the front end portion, the high hardness portion is provided behind the rear end of the pan frame, and the high hardness portion is vertically separated from the sinking suppressing member. When the high hardness portion is displaced downward, the high hardness portion comes into contact with the upper surface of the sinking suppressing member to suppress the sinking of the seated person's waist portion .

In the seat cushion of the present invention configured as described above, the high hardness portion is arranged so as to overlap the sinking suppressing member, and at the time of front collision, the high hardness portion comes into contact with the sinking suppressing member and the load is dispersed. Since the high hardness part is prevented from being displaced downward and the seated person's sinking is suppressed, the seated person's pelvis (lumbar part) may rotate too much, which may cause a compressive load on the spine. It is suppressed.

Further, in the above configuration, the seat cushion has a pipe frame arranged at the rear end of the seat cushion frame, and the sinking suppressing member is a front end of the seat cushion frame in the front-rear direction of the vehicle seat. It is preferable that the pipe member is provided between the pipe frame and the pipe frame.
In the above configuration, the pipe member as the sinking suppressing member is provided between the front end of the seat cushion frame and the pipe frame arranged at the rear end of the seat cushion frame at a position close to the waist of the seated person. Since the sinking of the lumbar region of the seated person is suppressed at the time of the front collision, it is effectively suppressed that the pelvis (lumbar region) of the seated person rotates too much and a compressive load is generated on the spine.

Further, in the above configuration, the seat cushion has a pipe frame arranged at the rear end of the seat cushion frame, and the sinking suppressing member is a front end of the seat cushion frame in the front-rear direction of the vehicle seat. It is preferable that the frame member is provided between the pipe frame and the pipe frame.
In the above configuration, the frame member as the sinking suppressing member is provided at a position close to the waist of the seated person between the front end of the seat cushion frame and the pipe frame arranged at the rear end of the seat cushion frame. At the time of a frontal collision, the rotation of the seated person's lumbar region (pelvis) due to the sinking of the seated person is appropriately suppressed.

Further, in the above configuration, it is preferable that the high hardness portion suppresses the sinking of the waist portion of the seated person by coming into contact with the sinking suppressing member when the portion is displaced downward.
In the above configuration, when the high hardness portion is displaced downward during a front collision, the high hardness portion comes into contact with the sinking suppressing member to disperse the load, and the high hardness portion is further displaced downward. Since it is blocked, it is further suppressed that the pelvis (lumbar region) rotates too much as the seated person sinks.

Further, in the above configuration, in the seat cushion, the cushion pad is covered with a trim cover, the trim cover is provided with a hanging portion, and the high hardness portion is the vehicle seat. In the seat width direction, the left and right hanging portions provided on the trim cover are arranged so as not to overlap with each other in the vertical direction of the vehicle seat, and the high hardness portion is arranged in the width direction of the vehicle seat. , It may be provided between the left and right hanging portions provided on the trim cover .
In the above configuration, since the downward displacement of the high hardness portion is blocked by the support member at the time of front collision, it is further suppressed that the pelvis (lumbar region) rotates too much due to the sinking of the seated person. To.

Further, in the above configuration, the high hardness portion may be a plate-shaped member arranged so as to straddle the sinking suppressing member in the front-rear direction of the vehicle seat.
In the above configuration, the downward displacement of the plate-shaped member is prevented by the surface contact of the lower surface of the plate-shaped member with the sinking suppressing member at the time of front collision. It is further suppressed that the waist) rotates too much.

Further, in the above configuration, in the seat cushion, the cushion pad is covered with a trim cover, the trim cover is provided with a hanging portion, and the high hardness portion is vertically and vertically connected to the hanging portion. It is preferable that they are provided at positions that overlap in the direction .
In the above configuration, the weight of the vehicle seat does not increase significantly as compared with the case where the high hardness portion is not provided, and the pelvis (lumbar region) rotates too much due to the sinking of the seated person at the time of front collision. It is possible to suppress.

Further, in the above configuration, the high hardness portion may be integrated with the cushion pad.
In the above configuration, since the high hardness portion is integrated with the cushion pad, it is not necessary to separately attach the high hardness portion to the cushion pad, and workability is improved.

Further, in the above configuration, the high hardness portion is arranged between the thin-walled portion provided on the cushion pad and the sinking suppressing member in the vertical direction of the vehicle seat, and the seat cushion is the seat cushion. It is preferable that the cushion pad is covered with a trim cover, the trim cover is provided with a hanging portion, and the high hardness portion is arranged between the hanging portion and the sinking suppressing member. ..
In the above configuration, since the high hardness portion is arranged between the thin wall portion of the cushion pad and the sinking suppressing member, the second sinking suppression is performed when the high hardness portion is displaced downward at the time of front collision. Since the positional relationship is appropriately blocked by the members, it is appropriately suppressed that the pelvis (lumbar region) of the seated person rotates too much.

Further, in the above configuration, the high hardness portion, which is a plate-shaped member, may be curved with respect to the width direction of the vehicle sheet.
In the above configuration, when the high hardness portion of the plate-shaped member is displaced downward during a front collision, the central portion or the end portion of the plate-shaped member curved in the sheet width direction comes into contact with the sinking suppressing member. Since the load is dispersed and the downward displacement of the high hardness portion is prevented, the pelvis (lumbar region) is appropriately suppressed from rotating too much due to the sinking of the seated person.
Further, according to the vehicle seat of the present invention, the subject is a vehicle seat provided with a seat cushion, and the seat cushion is a seat cushion frame and a cushion placed on the seat cushion frame. It has a pad and a high-hardness portion having a hardness higher than that of the material of the cushion pad provided below the cushion pad, and the high-hardness portion is the seat cushion frame or the seat cushion frame in the vertical direction of the vehicle seat. It is arranged so as to overlap at least a part of the sinking suppressing member provided in the vehicle body for suppressing the sinking of the seated person, and the sinking suppressing member is arranged below the high hardness portion and described above. The high-hardness portion is arranged apart from the sinking suppressing member in the vertical direction, and when the high-hardness portion is displaced downward, the high-hardness portion comes into contact with the sinking suppressing member, so that the seated person's waist portion sinks. In the seat cushion, the cushion pad is covered with a trim cover, the trim cover is provided with a hanging portion, and the high hardness portion is in the vertical direction with the hanging portion. The seat cushion is provided at an overlapping position, the seat cushion has a pipe frame arranged at the rear end of the seat cushion frame, and the sinking suppressing member is the rear end of the pan frame and the said in the front-rear direction of the vehicle seat. The problem is solved by the pipe member provided between the pipe frames.

According to the vehicle sheet of the present invention, the high hardness portion is arranged so as to overlap the sinking suppressing member, and at the time of front collision, the high hardness portion comes into contact with the sinking suppressing member to disperse the load, and the high hardness portion. Is prevented from being displaced downward, and the sinking of the seated person is suppressed, so that the pelvis (lumbar region) of the seated person is prevented from causing a compressive load on the spine due to excessive rotation.
Further, according to the vehicle seat of the present invention, the pipe member as the sinking suppressing member is located between the front end of the seat cushion frame and the pipe frame arranged at the rear end of the seat cushion frame, which is close to the waist of the seated person. Because it is provided in, the sinking of the seated person's lumbar region is suppressed at the time of a frontal collision, so it is effective that the pelvis (lumbar region) of the seated person rotates too much and a compressive load is generated on the spine. It is suppressed.
Further, according to the vehicle seat of the present invention, the frame member as the sinking suppressing member is located between the front end of the seat cushion frame and the pipe frame arranged at the rear end of the seat cushion frame, which is close to the waist of the seated person. Therefore, it is appropriately suppressed that the lumbar region (pelvis) of the seated person rotates with the sinking of the seated person at the time of a frontal collision.
Further, according to the vehicle sheet of the present invention, when the high hardness portion is displaced downward at the time of front collision, the high hardness portion comes into contact with the sinking suppressing member to disperse the load, and the high hardness portion further becomes. Since the downward displacement is prevented, the pelvis (lumbar region) is further suppressed from rotating too much due to the sinking of the seated person.
Further, according to the vehicle seat of the present invention, the downward displacement of the high hardness portion is blocked by the support member at the time of front collision, so that the pelvis (lumbar region) rotates too much as the seated person sinks. It is even more suppressed.
Further, according to the vehicle seat of the present invention, the downward displacement of the plate-shaped member is prevented by the surface contact of the lower surface of the plate-shaped member with the sinking suppressing member at the time of front collision. It is further suppressed that the pelvis (lumbar region) rotates too much due to the subduction.
Further, according to the vehicle seat of the present invention, the weight of the vehicle seat does not increase significantly as compared with the case where the high hardness portion is not provided, and the pelvis (lumbar portion) accompanies the sinking of the seated person at the time of front collision. It is possible to prevent the wheel from rotating too much.
Further, according to the vehicle seat of the present invention, since the high hardness portion is integrated with the cushion pad, it is not necessary to separately attach the high hardness portion to the cushion pad, and workability is improved.
Further, according to the vehicle seat of the present invention, since the high hardness portion is arranged between the thin wall portion of the cushion pad and the sinking suppressing member, when the high hardness portion is displaced downward at the time of a front collision. Since the positional relationship is appropriately blocked by the second sinking suppressing member, it is appropriately suppressed that the pelvis (lumbar region) of the seated person rotates too much.
Further, according to the vehicle seat of the present invention, when the high hardness portion of the plate-shaped member is displaced downward at the time of front collision, the central portion or the end portion of the plate-shaped member curved in the seat width direction is formed. Since the load is distributed in contact with the sinking suppressing member and the downward displacement of the high hardness part is prevented, the pelvis (lumbar part) is appropriately suppressed from rotating too much due to the sinking of the seated person. Will be done.

It is external drawing of the vehicle seat which concerns on 1st and 2nd Embodiment of this invention. It is a perspective view of the seat cushion frame of the vehicle seat which concerns on 1st Embodiment of this invention. It is a perspective view of the seat cushion frame in the state which removed the pan frame of the vehicle seat which concerns on 1st Embodiment of this invention. It is a top view of the seat cushion frame of the vehicle seat which concerns on 1st Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. 1 and is an explanatory view showing a positional relationship between the first and second subduction suppressing members according to the first embodiment of the present invention. FIG. 1 is a cross-sectional view taken along the line BB of FIG. 1 and is an explanatory view showing a positional relationship between the first and second subduction suppressing members according to the first embodiment of the present invention. It is a perspective view of the seat cushion frame of the vehicle seat which concerns on the 2nd Embodiment of this invention. It is a top view of the seat cushion frame of the vehicle seat which concerns on the 2nd Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. 1 and is an explanatory view showing a positional relationship between the first and second subduction suppressing members according to the second embodiment of the present invention. It is a perspective view of the seat cushion frame of the vehicle seat which concerns on the modification of 1st Embodiment of this invention.

Hereinafter, the vehicle seat according to the embodiment of the present invention (hereinafter referred to as the present embodiment) will be described with reference to FIGS. 1 to 10. As the vehicle seat according to the present embodiment, a vehicle seat mounted on a vehicle will be described as an example, but the vehicle seat is limited to a vehicle seat mounted on a ground traveling vehicle having wheels such as an automobile or a railroad. It may be a seat mounted on an aircraft, a ship, or the like that moves other than the ground.

It should be noted that the embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, arrangements, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

With respect to the terms indicating directions in the present specification, each direction is defined as shown in FIG. Specifically, in the following description, the "front-rear direction" means the front-rear direction when viewed from the seated person of the vehicle seat, and is a direction that coincides with the traveling direction of the vehicle. The "seat width direction" means the width direction of the vehicle seat, and corresponds to the left-right direction when viewed from the seated person of the vehicle seat. Further, the "vertical direction" means the height direction of the vehicle seat, and coincides with the vertical direction when the vehicle seat is viewed from the front.

[1. Configuration of vehicle seat S]
The vehicle seat S according to the present embodiment has the appearance shown in FIG. In FIG. 1, a part of the vehicle seat S (specifically, the front end corner portion of the seat cushion S1) is shown in a configuration in which the trim cover 1a is removed for convenience of illustration.

The vehicle seat S is arranged on the seat cushion S1 which is a seating part that supports the buttocks of the seated person, the seatback S2 which is the backrest part that supports the back of the seated person, and the head of the seated person. It has a headrest S3 that supports the headrest S3 as a main component. The seat cushion S1 is configured by placing the cushion pad 1b on the seat cushion frame 10 which is the skeleton shown in FIG. 2, and further covering the cushion pad 1b with the trim cover 1a. The seat back S2 is configured by placing a cushion pad (not shown) on a seat back frame (not shown) and covering it with a trim cover 1a. The headrest S3 is formed by arranging a pad material (not shown) on a core material (not shown) and covering it with a trim cover 1a.

The cushion pads of the seat cushion S1 and the seat back S2 are urethane base materials molded by foam molding using a urethane foam material. The trim cover 1a of the seat cushion S1 has a first hanging portion 2a (right hanging portion) provided on the right side of the seat cushion and extending in the front-rear direction, and a second hanging portion 2a provided on the left side of the seat cushion and extending in the front-rear direction. 2b (left side hanging part), a third hanging part 2c (front side hanging part) provided on the front side of the seat cushion and extending in the seat width direction, and a third hanging part 2c (front side hanging part) provided on the rear side of the seat cushion and extending in the seat width direction. A fourth hanging portion 2d (rear hanging portion) extending is provided respectively. Further, as will be described later, thin-walled portions having a thickness thinner than the surroundings are provided at positions corresponding to the suspended portions 2a to 2d of the cushion pad 1b.

[2. Seat cushion frame of the first embodiment]
The configuration of the seat cushion frame 10 according to the first embodiment of the present invention will be described with reference to FIGS. 2 and 3. The seat cushion frame 10 is supported by legs (not shown), and an inner rail is attached to the legs so that the position can be adjusted in the front-rear direction with the outer rail installed on the vehicle body floor. It is assembled. Further, the rear end portion of the seat cushion frame 10 is connected to the seat back frame (not shown) via a reclining mechanism (not shown).

In the present embodiment, as shown in FIG. 2, the seat cushion frame 10 has a substantially square frame-like outer shape when viewed from above. The seat cushion frame 10 includes a pair of side frames 11 that form the left and right end portions in the seat width direction, a pan frame 12 that constitutes the front end portion of the seat cushion frame 10, and the left and right side frames 11 as rear end portions. The main component is a connecting pipe 13 (pipe frame) to be connected in the above.

The two (pair) side frames 11 are arranged apart from each other in the left-right direction in order to define the width of the seat cushion frame 10, and are arranged so as to extend in the front-rear direction. A connecting pipe 13 is attached to the rear side of the side frame 11, and the left and right side frames 11 are connected to each other on the rear side by the connecting pipe 13.

Further, the pan frame 12 is fixedly joined to the front side of the pair of side frames 11, and the left and right side frames 11 are connected to each other on the front side by the pan frame 12. More specifically, the left-right end portions of the pan frame 12 are fixed to the flanges 11a provided on the side frame 11 by fixing means such as welding.

The pan frame 12 is mainly for supporting the thighs of a seated person (occupant), and is a frame formed of a metal plate material having a substantially flat upper surface formed in a substantially rectangular shape. As shown in FIG. 2 and FIG. 5 described later, the pan frame 12 has a front bent portion 12a whose front end is bent downward and a rear bent portion 12b whose front end is bent downward at the rear end 12e. It has. Further, a support surface 12c having a substantially flat upper surface is provided between the front bent portion 12a and the rear bent portion 12b. The left-right end portions of the support surface 12c are fixed to the flanges 11a of the side frame 11 (FIG. 2).

The end portion of the trim cover 1a is locked to the lower end portion of the front bent portion 12a of the pan frame 12. As the locking means between the trim cover 1a and the front bent portion 12a, a known method such as a trim cord is used. As shown in FIG. 2, a convex portion 12d is provided on the upper surface of the pan frame 12.

Next, FIG. 3 showing the seat cushion frame 10 in a state where the pan frame 12 is removed will be described with reference to FIG. 2. A front spring 14a and a rear spring 14b (support member) are arranged behind the rear end portion 12e of the pan frame 12. The front spring 14a and the rear spring 14b are laid horizontally between the left and right side frames 11, and both ends of the front spring 14a and the rear spring 14b are respectively locked to the locking portions 11b provided on the side frame 11. To. The locking portion 11b is formed as a portion between two holes separated in the front-rear direction, and the portion sandwiched by the holes is configured to bulge toward the inside of the side frame 11. Then, the end portion of the front spring 14a or the rear spring 14b is inserted from one hole, a part of the spring is placed along the bulging portion, and then the end portion is inserted into the other hole.

The front spring 14a and the rear spring 14b are arranged so as to be separated from each other by a predetermined distance when the seat cushion frame 10 is viewed from directly above (that is, in a plan view), and the extending directions are substantially parallel to each other. Further, the position corresponding to the ischial tuberosity of the seated person is supported between the anterior spring 14a and the posterior spring 14b (a space separated by a predetermined distance). That is, the anterior spring 14a and the posterior spring 14b are arranged apart from each other so as not to be arranged at least at a position directly below the ischial tuberosity.

The front spring 14a and the rear spring 14b are linear members formed in a wavy shape (zigzag shape) or the like, and mainly support the buttocks of the seated person. The ends of the front spring 14a and the rear spring 14b are pivotally supported by the left and right side frames 11, respectively, and the cushion pad 1b is placed above the front spring 14a and the rear spring 14b. That is, the front spring 14a and the rear spring 14b function as support members for supporting the cushion pad 1b.

As shown in FIG. 3, the seat cushion frame 10 of the present embodiment has a submarine for suppressing a submarine phenomenon in which the body of a seated person seated on the vehicle seat S slides forward and downward when the vehicle collides forward. A pipe 15 (first sinking suppressing member) is provided. The submarine pipe 15 is provided between the left and right side frames 11 at a position in front of the front spring 14a. Further, the submarine pipe 15 is arranged at a position in front of the rear end portion 12e and the rear bent portion 12b of the pan frame 12. Further, the submarine pipe 15 is arranged at a position below the pan frame 12, specifically, a position below the support surface 12c and the convex portion 12d of the pan frame 12.

When an impact such as a frontal collision occurs, the seated person may sink and the seated person's pelvis (waist) may rotate too much, resulting in a compressive load on the spine. The seat cushion frame 10 of the present embodiment has a second sinking suppression in order to prevent the pelvis (waist) from rotating too much due to the sinking of the seated person when an impact such as a front collision occurs. An additional pipe 16 as a member is provided. The additional pipe 16 is provided between the left and right side frames 11 at a position rearward and below the submarine pipe 15 and in front of the connecting pipe 13. Further, the additional pipe 16 is arranged at a position rearward from the rear end portion 12e and the rear bending portion 12b of the pan frame 12.

Although FIG. 3 shows an example in which the additional pipe 16 is provided between the front spring 14a and the rear spring 14b in the front-rear direction, the position of the additional pipe 16 in the front-rear direction is the submarine pipe 15 and the connecting pipe 13. The position is not particularly limited as long as it is possible to suppress the rotation of the pelvis (lumbar region) of the seated person at the time of a front collision.

According to the seat cushion frame 10 of the present embodiment in which the additional pipe 16 is arranged, the additional pipe extending in the left-right direction (seat width direction) when the cushion pad 1b is crushed at the time of front collision and the seated person sinks. Due to the presence of 16, the impact generated in the direction of sinking to the seated person is absorbed by the additional pipe 16. Therefore, it is possible to suppress the rotation of the pelvis (lumbar region) of the seated person and suppress the compressive load applied to the spine. That is, it is possible to suppress the subduction of the seated person from the front and the lower part by the submarine pipe 15 at the time of the front collision, and to suppress the subduction of the seated person's waist (pelvis) by the additional pipe 16. Further, since the additional pipe 16 is provided at a position closer to the waist of the seated person behind the rear end portion 12e of the pan frame 12, the pelvis (waist part) rotates with the sinking of the seated person at the time of front collision. Excessive suppression is effectively suppressed.

[3. Second sinking suppression member provided on the seat cushion pad (high hardness part)]
Hereinafter, the second sinking suppressing member (high hardness portion) provided on the cushion pad 1b of the seat cushion S1 according to the present embodiment will be described with reference to FIGS. 4 to 6. 4 is a top view of the seat cushion frame 10, FIG. 5 is a sectional view taken along the line AA of FIG. 1, and FIG. 6 is a sectional view taken along the line BB of FIG.

As an example of the second subduction suppressing member (high hardness portion) provided on the cushion pad 1b of the seat cushion S1 according to the present embodiment, a plate-shaped resin plate 17 will be described as an example. The resin plate 17 is provided at a position close to the lower surface or the lower surface of the cushion pad 1b, and is formed of a plate-like material having a hardness higher than that of the base material (urethane foam which is a urethane material) constituting the cushion pad 1b. It is a resin molded product of. The resin plate 17 is injection-molded in a state where the resin plate 17 is inserted into the base material constituting the cushion pad 1b. Since the resin plate 17 is integrally molded and integrated with the cushion pad 1b, it is not necessary to separately attach the resin plate 17 to the molded cushion pad 1b, which has an advantage of improving workability.

As shown in the top view of the seat cushion frame 10 in FIG. 4, the resin plate 17 has a front front end surface 17a, a rear rear end surface 17b, a right end surface 17c facing the right side frame 11, and a left side surface. It has a left end surface 17d facing the frame 11. Further, as shown in FIG. 5, the resin plate 17 has an upper surface portion 17e and a lower surface portion 17f.

As shown in FIG. 4, the resin plate 17 is arranged above the additional pipe 16 in a plan view of the seat cushion frame 10 when viewed from above. Further, as shown in FIGS. 4 and 5, the resin plate 17 is arranged so as to overlap at least a part of the additional pipe 16 in the vertical direction. In other words, at least a part of the resin plate 17 is in the same position in the front-rear direction as the additional pipe 16. Further, as shown in FIG. 4, the resin plate 17 is arranged so as to overlap at least a part of the front spring 14a and the rear spring 14b, which are support members for supporting the cushion pad 1b in the vertical direction.

Further, in the front-rear direction of the sheet, the additional pipe 16 is located between the front end surface 17a and the rear end surface 17b of the resin plate 17, and the front end surface 17a of the resin plate 17 is located behind the rear end of the submarine pipe 15. It is configured in. Further, at least a part of the resin plate 17 is at the same position as the additional pipe 16 in the left-right direction (seat width direction). In other words, the resin plate 17 is arranged so as to straddle the additional pipe 16 in the front-rear direction.

As shown in FIG. 5, the resin plate 17 is arranged so as to be located between the front thin portion 1c provided on the cushion pad 1b and the additional pipe 16 in the vertical direction. Further, as shown in FIG. 6, the resin plate 17 has the left and right thin-walled portions of the cushion pad 1b, that is, between the right-side thin-walled portion 1e and the left-side thin-walled portion 1f (left and right thin-walled portions) in the seat width direction (seat left-right direction). It is provided on the center side of the seat). In other words, the resin plate 17 is provided between the left and right hanging portions provided on the trim cover 1a, that is, between the first hanging portion 2a and the second hanging portion 2b in the seat width direction (seat left and right direction). It is provided on the center side of the seat with respect to the left and right hanging parts).

In the seat cushion frame 10 of the present embodiment, since the resin plate 17 is arranged at such a position, when the seated person sinks at the time of front collision, the downward displacement of the resin plate 17 is caused by the resin plate 17. By preventing the lower surface of the pelvis from coming into surface contact with the additional pipe 16, it is possible to prevent the pelvis (lumbar region) of the seated person from rotating too much. Specifically, as shown in FIGS. 5 and 6, when the resin plate 17 is displaced downward, the lower surface portion 17f comes into contact with the additional pipe 16 to disperse the load, and the resin plate 17 is displaced downward. Is blocked. Therefore, it is possible to prevent a compressive load from being generated in the spine due to excessive rotation of the pelvis (waist) of the seated person.

Here, it is preferable that the resin plate 17 is configured to transmit the load to each of the submarine pipe 15 and the additional pipe 16 when the resin plate 17 is displaced due to the collision because the load is dispersed. For example, in FIG. 4, the front end surface 17a of the resin plate 17 may be configured to be located in front of the submarine pipe 15, and the resin plate 17 may be provided so as to straddle the submarine pipe 15 and the additional pipe 16. .. At this time, when the resin plate 17 is displaced due to the collision, the load is transmitted to each of the submarine pipe 15 and the additional pipe 16 to disperse the load, so that the pelvis is sunk as the seated person sinks. It is possible to effectively prevent the (lumbar region) from rotating too much. Therefore, it is possible to suppress the compressive load generated in the spine of the seated person.

In FIG. 5, the distance between the line connecting the upper end of the submarine pipe 15 and the upper end of the additional pipe 16 and the lower surface portion 17f of the resin plate 17 increases toward the rear, but is not limited to this. Even if the distance between the line connecting the upper end of the submarine pipe 15 and the upper end of the additional pipe 16 and the lower surface portion 17f of the resin plate 17 is constant, or is configured to become narrower toward the rear. good.

In a configuration in which the height adjustment (vertical adjustment) and the front-rear position adjustment (slide adjustment) of the seat cushion S1 can be performed, the additional pipe 16 is configured to face the resin plate 17 (high hardness portion). It is preferable because it is possible to prevent the lumbar region from rotating too much due to the sinking of the seated person without being affected by the height (vertical position) or the front-rear position of the seat cushion S1.

Further, when the height adjustment (vertical adjustment) or the front-rear position adjustment (slide adjustment) of the seat cushion S1 is performed, the resin plate 17 (high hardness portion) follows the additional pipe 16 in the vertical direction and the front-rear direction. If it is configured to be displaced, it is possible to prevent the seated person's pelvis (waist) from rotating too much without being affected by the height (vertical position) or front-back position of the seat cushion S1. It is preferable because it is possible.

[4. Seat cushion frame of the second embodiment]
An example in which the seat cushion frame of the vehicle seat according to the first embodiment is provided with a submarine pipe as the first sinking suppressing member (for example, the seat cushion frame of the front seat) has been described, but in the second embodiment, , A seat cushion frame without a submarine pipe (a seat cushion frame for front seats and a seat cushion frame for rear seats) will be described.

Hereinafter, the seat cushion frame according to the second embodiment of the present invention will be described with reference to FIGS. 7 to 9. Only the configuration different from the first embodiment will be described, and the other configurations are the same as the configurations of the first embodiment, and thus the description thereof will be omitted.

FIG. 7 shows a perspective view of the seat cushion frame 10'of the vehicle seat according to the second embodiment. The seat cushion frame 10'is different from the first embodiment in that it does not include a member corresponding to a submarine pipe. The seat cushion frame 10'according to the second embodiment has a high hardness portion having a hardness higher than that of the material of the cushion pad 1b'below the cushion pad 1b', and the resin plate 17'(at the time of front collision). When the high hardness portion) is displaced downward, the resin plate 17'contacts the seat cushion frame 10'or the sinking suppressing member provided on the vehicle body, and the downward displacement of the resin plate 17'is prevented. This is configured to prevent the pelvis (lumbar region) from rotating too much as the seated person sinks.

As an example of the sinking suppressing member provided in the seat cushion frame 10'or the vehicle body, any one capable of suppressing the downward displacement of the resin plate 17'(high hardness portion) provided in the cushion pad 1b' Examples thereof include, but are not limited to, a frame piece 18', an additional pipe 16', and a vehicle body (not shown).

As shown in FIG. 7, the additional pipe 16'is located between the front end (front frame 12') of the seat cushion frame 10'and the connecting pipe 13 (pipe frame) at the rear end of the seat cushion frame 10' in the front-rear direction of the seat. It is provided in. Further, the frame piece 18'is provided between the left and right side frames 11'and is a frame member connecting the left and right side frames 11' in the seat width direction, and is a front end of the seat cushion frame 10'in the seat front-rear direction. It is provided between the front frame 12') and the connecting pipe 13 (pipe frame) at the rear end of the seat cushion frame 10'.

Further, the frame piece 18'is provided between the left and right side frames 11'at a position in front of the front spring 14a', and the additional pipe 16'is provided on the left and right sides at a position behind the front spring 14a'. It is provided between the frames 11'.

As shown in FIG. 8, when the seat cushion frame 10'is viewed from above in the vertical direction of the seat, the resin plate 17'is arranged at a position above the frame piece 18'and the additional pipe 16'. Further, in the front-rear direction of the sheet, the front end surface 17a'of the resin plate 17'is located in front of the frame piece 18', and the rear end surface 17b of the resin plate 17'is located behind the additional pipe 16'. Has been done.

According to the seat cushion frame 10'of the vehicle seat according to the second embodiment, when the seated person sinks at the time of a front collision, the downward displacement of the resin plate 17'is a sinking suppressing member (frame piece 18). By being blocked by', an additional pipe 16'or a vehicle body (not shown), it is possible to prevent the pelvis (lumbar region) of the seated person from rotating too much. Specifically, as shown in FIG. 9, the downward displacement of the lower surface portion 17f'of the resin plate 17'is prevented by the sinking suppressing member (frame piece 18', additional pipe 16', or vehicle body (not shown). As a result, it is possible to prevent the lumbar region from rotating too much due to the sinking of the seated person.

[5. Modification example]
The present invention is not limited to the above embodiment. Hereinafter, a modified example of the seat cushion frame and the seat cushion according to the present embodiment will be described.

In the above embodiment, as shown in FIG. 2, an example is shown in which the ends of the support members (front spring 14a and rear spring 14b) that support the cushion pad 1b are attached to the left and right side frames 11 and arranged. However, the arrangement of the support member is not limited to this. For example, as shown in FIG. 10, the spring 14'as a support member may be arranged so as to extend in the front-rear direction of the seat. Specifically, by attaching the front end of the spring 14'to the convex portion 12d of the pan frame 12 and attaching the rear end of the spring 14' to the connecting pipe 13, the spring 14'(support) in the front-rear direction of the seat. It is also possible to arrange members).

In the above embodiment, as shown in FIG. 5, the submarine pipe 15 is above the additional pipe 16 with respect to the height position (position in the vertical direction) of the two subduction suppressing members (submarine pipe 15 and additional pipe 16). An example provided is shown, but the present invention is not limited to this, and if the rotation of the pelvis (waist) of the seated person (occupant) is appropriately suppressed when an impact is generated, the submarine pipe 15 and the additional pipe are shown. The height position of 16 may be the same, and the additional pipe 16 may be provided at a position above the submarine pipe 15.

Further, in the embodiment shown in FIG. 5, the additional pipe 16 is provided below the rear end portion 12e and the rear bent portion 12b of the pan frame 12, but the rear end portion 12e and / or the rear of the pan frame 12 is provided. The bent portion 12b may be provided below the additional pipe 16. When the rear end portion 12e and the rear bent portion 12b of the pan frame 12 are provided below the additional pipe 16, when the waist portion of the seated person sinks, the rear end portion 12e and the rear bent portion 12b are provided. Contact with the seated person is suppressed via the trim cover 1a and the cushion pad 1b.

Further, in the embodiment shown in FIG. 5, the rear end portion 12e and the rear bending portion 12b of the pan frame 12 are provided in front of the additional pipe 16, but the rear end portion 12e and the rear bending portion 12b of the pan frame 12 are provided. The portion 12b may be configured to extend to a position behind the additional pipe 16.

In the above embodiment, as shown in FIGS. 3 to 5, the first subduction suppressing member and the second subduction suppressing member (submarine pipe 15 and additional pipe 16) are configured as separate bodies, but two subductions are formed. It is also possible to form the restraining members by integrating or connecting them.

Further, in the above embodiment, an example in which the additional pipe 16 (second sinking suppressing member) is formed as a linear pipe member is shown, but a convex portion may be provided behind the seat in the front-rear direction of the pipe member, or a pipe may be provided. A convex portion may be provided above the seat in the vertical direction of the member, or one side of the cross-sectional shape may be configured to incline toward the rear or front in the front-rear direction of the seat with respect to the other side. Further, the pipe member may be formed by connecting two members or by joining two half-shaped members.

Further, in the above embodiment, an example is shown in which the diameter and the wall thickness of the two pipes of the first subduction suppressing member and the second subduction suppressing member (submarine pipe 15 and additional pipe 16) are different. Not limited. For example, when the diameter of the submarine pipe 15 is D1 and the wall thickness is d1, and the diameter of the additional pipe 16 is D2 and the wall thickness is d2, the sinking of the seated person's waist is appropriately suppressed when an impact is generated. If there is, the diameter may be any of D1> D2, D1 = D2, D1 <D2, and the wall thickness may be any of d1> d2, d1 = d2, d1 <d2, and the diameter and wall thickness may be any. It is also possible to appropriately select the combination of.

In the above embodiment, an example in which the cushion pad and the resin plate (high hardness portion) are integrated by integral molding is shown, but the present invention is not limited to this, and the cushion pad is provided with a recess and the resin plate is provided in the recess. It may be accommodated. Further, it is preferable to use a resin plate as the high hardness portion from the viewpoint of weight reduction, but a metal plate may be used instead of the resin. When metal is used as the material constituting the high hardness portion, it becomes easy to secure the required rigidity even if the high hardness portion (metal plate) is miniaturized.

In the above embodiment, an example is shown in which the plate-shaped high hardness portions (resin plates 17, 17') are integrally molded by being integrally molded with the cushion pads 1b, 1b', but the method of attaching to the cushion pad is as follows. The present invention is not limited to this, and a plate-shaped high hardness portion may be attached to a coarse blanket as a backing material attached to the lower surface of the cushion pad. At this time, by providing fine irregularities on the surface (upper surface) and the end of the plate-shaped high-hardness portion on the side in contact with the cushion pad, the plate-shaped high-hardness portion may fall off from the lower surface of the cushion pad. It is suppressed.

Further, as a material constituting the high hardness portion, it is also possible to use a substance exhibiting dilatant physical characteristics, which is usually soft and becomes hard when subjected to an impact. When a substance showing physical characteristics is used, it is usually soft and does not give a sense of discomfort to the seated person, but becomes hard when it receives an impact such as a frontal collision, and the seated person sinks and the pelvis (lumbar region) associated with the sinking. It is possible to effectively suppress the rotation.

The shape of the high hardness portion such as the resin plate 17 is not limited to a flat one, and may have a curved shape that curves in the left-right direction (sheet width direction). Specifically, the right end surface 17c and the left end surface 17d of the resin plate 17 may be curved so as to be located below or above the central portion of the resin plate 17. Further, the resin plate 17 may have a curved shape that curves in the front-rear direction. Specifically, the shape may be such that the front end surface 17a and the rear end surface 17b of the resin plate 17 are curved so as to be located below or above the central portion of the resin plate 17. When the resin plate 17 is curved, the central portion or the end portion of the resin plate 17 comes into contact with the additional pipe 16 and a load is applied when the high hardness portion, which is a plate-shaped member, is displaced downward at the time of front collision. Is dispersed and the downward displacement of the resin plate 17 is prevented, so that the seated person's waist is appropriately suppressed from rotating too much. Further, the left and right side portions (right end surface 17c and left end surface 17d) of the high hardness portion such as the resin plate 17 can be thinned, or the central portion can be thinned.

In the above embodiment, the plate-shaped high hardness portion (resin plates 17, 17') is provided on the cushion pads 1b, 1b', but the high hardness portion may be provided on the cushion pad 1b, 1b'. Specifically, the left and right ends of the plate-shaped high-hardness portion are attached by hooking them on the left and right side frames 11, respectively, and the lower surface of the plate-shaped high-hardness portion is supported by the front spring 14a and the rear spring 14b. It may be installed on the seat cushion.

In the above embodiment, an example in which a resin plate is used as the high hardness portion provided on the cushion pad has been described, but the embodiment of the high hardness portion is not limited to this. For example, a coarse blanket as a backing material having a hardness higher than that of the urethane base material, which is attached to the lower surface of the cushion pad, may be used as the high hardness portion. In addition, when the high hardness part is displaced downward, the part that comes into contact with the sinking suppressing member (additional pipe, frame member, vehicle body, etc.), specifically, the additional pipe of the backing material such as a coarse blanket, The hardness of the portion facing the frame member, the vehicle body, or the like may be increased. Coarse blankets, felts, press felts, or non-woven fabrics can be used as the lining material, but some areas of these lining materials are sprayed or impregnated with a material having a hardness higher than urethane, such as resin. The hardness may be increased by increasing the hardness.

The seat cushion according to the present embodiment has been described above by taking as an example the seat cushion of the vehicle seat mounted on the vehicle. The seat cushion according to the present embodiment is not limited to the seat cushion of the vehicle seat, and the seat that may cause an impact on the seated person, particularly the lumbar region of the seated person when the impact is generated, sinks. As long as it is a seat cushion of the obtained seat, there are no particular restrictions on its use. 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 vehicle.

S Vehicle seat (vehicle seat)
S1 Seat cushion 1a Trim cover 1b Cushion pad 1c Front thin part 1d Rear thin part 1e Right thin part 1f Left thin part 2a First hanging part (right side hanging part)
2b Second hanging part (left hanging part)
2c Third hanging part (front hanging part)
2d 4th hanging part (rear hanging part)
S2 Seat back S3 Headrest 10,10'Seat cushion frame 11,11' Side frame 11a, 11a' Flange 11b, 11b' Locking part 12 Pan frame 12a Front bent part 12b Rear bent part 12c Support surface 12d Convex part 12e Rear end 12'Front frame 13, 13'Connecting pipes 14a, 14a' Front spring (support member)
14b, 14b'rear spring (support member)
14'Spring (support member)
15 Submarine pipe (first subduction suppression member)
16, 16'Additional pipe (second subduction suppression member)
17,17'resin plate (second subduction suppression member, high hardness part)
17a, 17a'Front end face (front end)
17b, 17b'rear end face (rear end)
17c, 17c'Right end face (right end)
17d, 17d'Left end face (left end)
17e, 17e'Top surface (upper end)
17f, 17f'Lower surface (lower end)
18'Frame piece (subduction suppression member, frame member)

Claims (11)

A vehicle seat with a seat cushion,
The seat cushion includes a seat cushion frame and
The cushion pad placed on the seat cushion frame and
It has a high hardness portion having a hardness higher than that of the material of the cushion pad provided below the cushion pad.
The high hardness portion is arranged so as to overlap at least a part of the sinking suppressing member provided in the seat cushion frame or the vehicle body in the vertical direction of the vehicle seat for suppressing the sinking of the seated person.
The subduction suppressing member is arranged below the high hardness portion, and is arranged below the high hardness portion .
The seat cushion frame has a pan frame at the front end and has a pan frame.
The high hardness portion is provided behind the rear end of the pan frame.
The high hardness portion is arranged so as to be separated from the sinking suppressing member in the vertical direction.
A vehicle seat characterized in that when the high hardness portion is displaced downward, it comes into contact with the upper surface of the sinking suppressing member to suppress the sinking of the waist portion of the seated person . The seat cushion has a pipe frame arranged at the rear end of the seat cushion frame.
The vehicle seat according to claim 1, wherein the sinking suppressing member is a pipe member provided between the front end of the seat cushion frame and the pipe frame in the front-rear direction of the vehicle seat. The seat cushion has a pipe frame arranged at the rear end of the seat cushion frame.
The vehicle seat according to claim 1, wherein the sinking suppressing member is a frame member provided between the front end of the seat cushion frame and the pipe frame in the front-rear direction of the vehicle seat. The invention according to any one of claims 1 to 3, wherein the high hardness portion suppresses the sinking of the waist portion of the seated person by coming into contact with the sinking suppressing member when the portion is displaced downward. Vehicle seat. In the seat cushion, the cushion pad is covered with a trim cover.
The trim cover is provided with a hanging portion, and the trim cover is provided with a hanging portion.
The high hardness portion is arranged so as not to overlap the left and right hanging portions provided on the trim cover in the vertical direction of the vehicle seat in the seat width direction of the vehicle seat .
The high hardness portion is provided in any one of claims 1 to 4, wherein the high hardness portion is provided between the left and right suspension portions provided on the trim cover in the width direction of the vehicle seat. The vehicle seat described. The vehicle according to any one of claims 1 to 5, wherein the high hardness portion is a plate-shaped member arranged so as to straddle the sinking suppressing member in the front-rear direction of the vehicle sheet. Sheet for. In the seat cushion, the cushion pad is covered with a trim cover.
The trim cover is provided with a hanging portion, and the trim cover is provided with a hanging portion.
The vehicle sheet according to any one of claims 1 to 6, wherein the high hardness portion is provided at a position where the suspension portion overlaps in the vertical direction . The vehicle seat according to any one of claims 1 to 7, wherein the high hardness portion is integrated with the cushion pad. The high hardness portion is arranged between the thin-walled portion provided on the cushion pad and the sinking suppressing member in the vertical direction of the vehicle seat .
In the seat cushion, the cushion pad is covered with a trim cover.
The trim cover is provided with a hanging portion, and the trim cover is provided with a hanging portion.
The vehicle sheet according to any one of claims 1 to 8 , wherein the high hardness portion is arranged between the hanging portion and the sinking suppressing member . The vehicle sheet according to claim 6, wherein the high hardness portion, which is a plate-shaped member, is curved with respect to the width direction of the vehicle sheet. A vehicle seat with a seat cushion,
The seat cushion includes a seat cushion frame and
The cushion pad placed on the seat cushion frame and
It has a high hardness portion having a hardness higher than that of the material of the cushion pad provided below the cushion pad.
The high hardness portion is arranged so as to overlap at least a part of the sinking suppressing member provided in the seat cushion frame or the vehicle body in the vertical direction of the vehicle seat for suppressing the sinking of the seated person.
The subduction suppressing member is arranged below the high hardness portion, and is arranged below the high hardness portion.
The high hardness portion is arranged so as to be separated from the sinking suppressing member in the vertical direction.
When the high hardness portion is displaced downward, it comes into contact with the sinking suppressing member to suppress the sinking of the waist portion of the seated person.
In the seat cushion, the cushion pad is covered with a trim cover.
The trim cover is provided with a hanging portion, and the trim cover is provided with a hanging portion.
The high hardness portion is provided at a position where it overlaps with the hanging portion in the vertical direction.
The seat cushion has a pipe frame arranged at the rear end of the seat cushion frame.
The vehicle seat is characterized in that the sinking suppressing member is a pipe member provided between the rear end of the pan frame and the pipe frame in the front-rear direction of the vehicle seat.

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