JP2021115981A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which has an impact absorption member formed in a simple structure and can efficiently absorb an impact exerted on a seated person when an impact, such a collision, occurs.SOLUTION: A vehicle seat S includes a seat cushion S1. The seat cushion S1 has: a seat cushion frame including a pair of side frames 14 which are provided spaced apart from each other in a width direction of the vehicle seat S; a seat cushion pad S11 placed on the seat cushion frame; and an impact absorption member 20 provided below the seat cushion pad S11. The impact absorption member 20 is provided with recessed parts 26, 27 including bottom surfaces 26a, 27a. The bottom surfaces 26a, 27a of the recessed parts 26, 27 incline downward from the front side to the rear side of the vehicle seat S.SELECTED DRAWING: Figure 4A

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of absorbing an impact applied to a seated person 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. .. In Patent Document 1, an energy absorbing material having a cross-sectional shape substantially similar to that of the cushion is provided on the bottom surface of the cushion made of urethane material or the like in order to prevent the seated person's hips from jumping forward at the time of a front collision. The provided automobile seats are listed.

Jitsukaisho 49-019903

In the shock absorbing member of Patent Document 1, in order to change the shock absorbing efficiency, the material and the density are changed, and the shock absorbing member is formed with a simple structure while improving the shock absorbing efficiency. Was required.

The present invention has been made in view of the above problems, and an object of the present invention is to efficiently absorb the impact generated on the seated person when an impact such as a collision occurs while forming the impact absorbing member with a simple structure. Is to provide a vehicle seat capable of.

According to the vehicle seat of the present invention, the problem is a vehicle seat provided with a seat cushion, and the seat cushion has a pair of side frames provided apart from each other in the width direction of the vehicle seat. It has a seat cushion frame provided, a seat cushion pad placed on the seat cushion frame, and a shock absorbing member provided below the seat cushion pad, and the shock absorbing member includes a bottom surface. The recess is provided, and the bottom surface of the recess is solved by inclining downward from the front to the rear of the vehicle seat.

The vehicle seat of the present invention configured as described above has a simple configuration in which the shock absorbing member is provided with a recess having a bottom surface, and the recess and the bottom surface of the recess are appropriately arranged, so that a collision occurs. It is possible to efficiently absorb the impact generated on the seated person when such an impact is generated.

Further, in the above configuration, the recess is a first recess provided on the upper surface side of the shock absorbing member, and the first recess has an oval shape extending in the front-rear direction of the vehicle seat. It is good.
In the above configuration, the rigidity of the upper surface of the shock absorbing member in the front-rear direction is improved, so that the shock absorption efficiency in the front-rear direction is improved.

Further, in the above configuration, the recess is a second recess provided on the lower surface side of the shock absorbing member, and the second recess has an oval shape extending in the front-rear direction of the vehicle seat. It is good.
In the above configuration, the rigidity of the lower surface of the shock absorbing member in the front-rear direction is improved, so that the shock absorption efficiency in the front-rear direction is improved.

Further, in the above configuration, it is preferable that the first recess is provided with a first bottom surface that is inclined from the front to the rear of the vehicle seat.
In the above configuration, the impact absorption efficiency is improved by improving the rigidity of the first recess.

Further, in the above configuration, it is preferable that the second concave portion is provided with a second bottom surface that is inclined from the front to the rear of the vehicle seat.
In the above configuration, the impact absorption efficiency is improved by improving the rigidity of the second recess.

Further, in the above configuration, the recess includes a first recess provided on the upper surface side of the shock absorbing member and a second recess provided on the lower surface side of the shock absorbing member, and the first recess is provided. Is provided with a first bottom surface, a second bottom surface is provided in the second recess, and the first bottom surface and the second bottom surface are separated from each other in the vertical direction of the vehicle seat. It is preferable that a space portion is formed between the first bottom surface and the second bottom surface.
In the above configuration, the space portion functions as an elastic deformation region, so that the shock absorption can be easily adjusted.

Further, in the above configuration, the recess includes a first recess provided on the upper surface side of the shock absorbing member and a second recess provided on the lower surface side of the shock absorbing member, and the first recess is provided. Is provided with a first bottom surface, a second bottom surface is provided in the second recess, and the first bottom surface and the second bottom surface are in contact with each other in the vertical direction of the vehicle seat. It is good to be there.
In the above configuration, the contact between the first bottom surface and the second bottom surface improves the rigidity, so that the shock absorption efficiency is improved. Further, when the thickness of the bottom surface is increased, the rigidity is further improved and the shock absorption efficiency is also improved.

Further, in the above configuration, inside the shock absorbing member, a first space portion is formed in front of the recess, a second space portion is formed behind the recess, and the first space portion is formed. It is preferable that the space is larger than the second space.
In the above configuration, the impact absorption efficiency is improved by changing the flexibility of the front and rear of the shock absorbing member due to the difference in size between the first space portion and the second space portion.

Further, in the above configuration, it is preferable that a front groove portion extending in the vertical direction of the vehicle seat is formed on the front surface of the shock absorbing member.
With the above configuration, the shock absorption efficiency on the front surface of the shock absorbing member is improved.

Further, in the above configuration, it is preferable that an upper groove portion extending in the front-rear direction of the vehicle seat is formed on the upper surface of the shock absorbing member.
With the above configuration, the shock absorption efficiency on the upper surface of the shock absorbing member is improved.

Further, in the above configuration, it is preferable that a lower groove portion extending in the front-rear direction of the vehicle seat is formed on the lower surface of the shock absorbing member.
With the above configuration, the shock absorption efficiency on the lower surface of the shock absorbing member is improved.

Further, in the above configuration, the upper groove portion may be formed so as to be connected to the recess.
With the above configuration, the shock absorption efficiency on the upper surface of the shock absorbing member is further improved.

Further, in the above configuration, the lower groove portion may be formed so as to be connected to the recess.
With the above configuration, the shock absorption efficiency on the lower surface of the shock absorbing member is further improved.

According to the vehicle seat of the present invention, the shock absorbing member has a simple structure in which a recess having a bottom surface is provided, but the recess and the bottom surface of the recess are appropriately arranged, so that when an impact such as a collision occurs. It is possible to efficiently absorb the impact generated on the seated person.
Further, according to the vehicle seat of the present invention, the rigidity in the front-rear direction is improved on the upper surface of the shock absorbing member, so that the shock absorption efficiency in the front-rear direction is improved.
Further, according to the vehicle seat of the present invention, the rigidity in the front-rear direction is improved on the lower surface of the shock absorbing member, so that the shock absorption efficiency in the front-rear direction is improved.
Further, according to the vehicle seat of the present invention, the impact absorption efficiency is improved by improving the rigidity of the first recess.
Further, according to the vehicle seat of the present invention, the impact absorption efficiency is improved by improving the rigidity of the second recess.
Further, according to the vehicle seat of the present invention, the space portion functions as an elastic deformation region, so that the shock absorption can be easily adjusted.
Further, according to the vehicle seat of the present invention, the first bottom surface and the second bottom surface increase the thickness of the bottom surface portion and improve the rigidity, so that the shock absorption efficiency is improved.
Further, according to the vehicle seat of the present invention, the flexibility of the shock absorbing member in the front and the rear changes due to the difference in size between the first space and the second space, thereby absorbing the shock. Efficiency is improved.
Further, according to the vehicle seat of the present invention, the shock absorption efficiency on the front surface of the shock absorbing member is improved.
Further, according to the vehicle seat of the present invention, the shock absorption efficiency on the upper surface of the shock absorbing member is improved.
Further, according to the vehicle seat of the present invention, the shock absorption efficiency on the lower surface of the shock absorbing member is improved.
Further, according to the vehicle seat of the present invention, the shock absorption efficiency on the upper surface of the shock absorbing member is further improved.
Further, according to the vehicle seat of the present invention, the shock absorption efficiency on the lower surface of the shock absorbing member is further improved.

It is an external view of the vehicle seat which concerns on embodiment of this invention. It is a schematic external view which shows the position of the shock absorbing member provided in the vehicle seat which concerns on embodiment of this invention. FIG. 1A is a cross-sectional view taken along the line AA of FIG. 1A, which is an explanatory view showing a structure around a shock absorbing member included in a vehicle seat according to an embodiment of the present invention. It is a perspective view of the shock absorbing member provided in the vehicle seat which concerns on this embodiment. It is an external view of the shock absorbing member provided in the vehicle seat which concerns on this embodiment. FIG. 3B is a cross-sectional view taken along the line BB of FIG. 3B, which is a schematic view showing an example of the internal structure of the shock absorbing member. FIG. 3B is a cross-sectional view taken along the line BB of FIG. 3B, which is a schematic view showing an example of the internal structure of the shock absorbing member. FIG. 3B is a cross-sectional view taken along the line BB of FIG. 3B, which is a schematic view showing another example of the structure of the shock absorbing member. It is an external view of the shock absorbing member provided in the vehicle seat which concerns on a modification. It is an external view of the shock absorbing member provided in the vehicle seat which concerns on a modification. It is a front view of the shock absorbing member provided in the vehicle seat which concerns on a modification. It is a front view of the shock absorbing member provided in the vehicle seat which concerns on a modification. It is a top view of the shock absorbing member provided in the vehicle seat which concerns on a modification. It is a bottom view of the shock absorbing member provided in the vehicle seat which concerns on a modification.

Hereinafter, the vehicle seat according to the embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to FIGS. 1 to 8. As the vehicle seat according to the present embodiment, the rear seat for a vehicle mounted on a vehicle will be described as an example, but the rear seat for a vehicle mounted on a ground traveling vehicle having wheels such as an automobile or a railroad will be described. The seats are not limited to the above, 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 a ship moving 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, etc. of the members described below can be changed and improved without departing from the gist 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 coincides with 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, which 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. 1A. In FIG. 1A, 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 S12 is removed for convenience of illustration.

The vehicle seat S is arranged above the seat cushion S1 which is a seating portion that supports the buttocks of the seated person, the seat back S2 which is a backrest portion 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 seat cushion pad S11 on a seat cushion frame serving as a skeleton, and further covering the seat cushion pad S11 with a trim cover S12. As shown in FIG. 1B, the seat cushion frame has a seat cushion side frame S14. 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 S12. 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 S12.

The seat cushion pad S11 of the seat cushion S1 and the seat back pad of the seat back S2 are urethane base materials molded by foam molding using a urethane foam material. The trim cover S12 of the seat cushion S1 has a first hanging portion T1 (right hanging portion) provided on the right side of the seat cushion and extending in the front-rear direction, and a second hanging portion T1 (hanging portion on the right side) provided on the left side of the seat cushion and extending in the front-rear direction. A third hanging portion T2 (left hanging portion) and a third hanging portion T3 (rear hanging portion) provided on the rear side of the seat cushion and extending in the seat width direction are provided. Further, at the positions corresponding to the respective hanging portions T1 to T3 of the seat cushion pad S11, thin-walled portions having a thickness thinner than the surroundings are provided.

[2. Seat cushion of this embodiment]
The configuration of the seat cushion S1 of the vehicle seat S according to the present embodiment will be described with reference to FIGS. 2 to 4C. In FIG. 2, the trim cover S12 is not shown. As shown in FIG. 2A cross-sectional view of FIG. 1A, a shock absorbing member 20 is provided below the seat cushion pad S11. As shown in FIGS. 3A to 4C, the shock absorbing member 20 is provided with recesses (first recess 26 and second recess 27, which will be described later) between the upper surface 21 and the lower surface 22.

The shock absorbing member 20 is arranged inside the pair of seat cushion side frames S14 provided apart from each other in the seat width direction (FIG. 1B). More specifically, the shock absorbing member 20 is arranged below the seat cushion pad S11 and at a substantially central position between the pair of seat cushion side frames S14 in the seat width direction (FIG. 1B). The seat cushion side frame S14 is not limited to the plate-shaped member, and may be formed of a pipe. Further, it may be a portion provided on the left and right in the seat width direction when the pipe is bent and provided in the frame shape.

The shock absorbing member 20 is a hollow-shaped blow-molded product, has a higher hardness than the seat cushion pad S11 which is a urethane pad, and is formed so as to be crushed and shock-absorbed when a certain load value is exceeded.

The lower surface 22 of the shock absorbing member 20 is supported by a plate-shaped member 10 which is a supporting member from below. The plate-shaped member 10 is a plate-shaped member that constitutes a floor that supports the rear seat for the vehicle from below, and the shock absorbing member 20 is placed on the flat portion 11. Further, at the front end of the plate-shaped member 10, a protruding portion 12 (an example of the front position regulating portion P2 of the front position regulating member P, which will be described later) is formed so as to project upward with respect to the flat portion 11.

The plate-shaped member may be a part of the seat cushion frame, and the material is not limited to metal and may be a member made of resin. Further, the support member may be a linear member such as an S spring or a wire, or a planar elastic body such as a cloth-like support member, as long as it can support the shock absorbing member. With such a structure, it is possible to support the shock absorbing member with a simple structure.

The front surface 23 of the shock absorbing member 20 is in contact with the protruding portion 12. Since the front surface 23 of the shock absorbing member 20 is supported by the protruding portion 12 from the front surface, the shock absorbing effect is stably exhibited.

As shown in FIG. 2, the seat cushion pad S11 is formed with a pad recess S11b recessed upward on the lower surface S11a thereof. Since at least a part of the upper surface 21 of the shock absorbing member 20 is housed in the pad recess S11b of the seat cushion pad S11, the position of the shock absorbing member 20 with respect to the seat cushion pad S11 is stable.

The projecting portion 12 projecting upward (an example of the front position regulating portion P2 of the front position regulating member P described later) extends in the seat width direction and is seated on the vehicle seat S when the vehicle collides forward. It functions as a sinking suppressing member for suppressing the submarine phenomenon in which the seated person's body slides forward and downward. Since the shock absorbing member 20 is arranged behind the protruding portion 12 extending in the seat width direction, the influence of the protruding portion 12 is suppressed when the load at the time of shock absorption is transmitted to the shock absorbing member 20. Will be done. The sinking suppressing member may be a pipe member (for example, a submarine pipe) extending in the seat width direction near the front end of the seat.

Further, no metal member such as a seat frame member is arranged between the upper surface 21 of the shock absorbing member 20 and the lower surface S11a of the seat cushion pad S11. Since no metal member is arranged above the shock absorbing member 20 with the seat cushion pad S11, the load from the occupant is stably transmitted to the shock absorbing member 20.

As shown in FIGS. 3A to 4C, the shock absorbing member 20 includes an upper surface 21 and a lower surface 22 in the vertical direction, a front surface 23 and a rear surface 24 in the front-rear direction, and a first side surface 25a and a second side surface 25b in the seat width direction. It has a hollow shape surrounded by. Further, on the upper surface 21 of the shock absorbing member 20, an inclined surface 21a that inclines downward toward the rear is formed.

A first recess 26 is provided on the upper surface 21 side of the shock absorbing member 20, and a second recess 27 is provided on the lower surface 22 side of the shock absorbing member 20. More specifically, a first recess 26 opened upward is provided on the upper surface 21 side of the shock absorbing member 20, and a second recess 26 opened downward on the lower surface 22 side of the shock absorbing member 20. 27 is provided. The first recess 26 and the second recess 27 have an oval shape extending in the front-rear direction in the top view of the shock absorbing member 20.

The first recess 26 and the second recess 27 are inclined in the vertical direction with respect to the horizontal direction (front-back direction). More specifically, the first recess 26 and the second recess 27 are formed so as to be inclined downward from the front to the rear. That is, it is inclined with respect to the input direction of the load from the occupant (from the rear to the front). As described above, the vehicle seat S according to the present embodiment has a simple configuration in which the shock absorbing member 20 is provided with a recess, but the recess is arranged appropriately with respect to the load input direction, so that a collision or the like occurs. It is possible to efficiently absorb the impact generated on the seated person when the impact is generated.

The first recess 26 is provided with a first bottom surface 26a that is inclined downward from the front to the rear. Further, the second recess 27 is provided with a second bottom surface 27a that is inclined downward from the front to the rear. By providing the first bottom surface 26a, the rigidity of the first recess 26 is improved, so that the shock absorption efficiency of the shock absorbing member 20 is improved. Further, since the second bottom surface 27a is provided, the rigidity of the second recess 27 is improved, so that the shock absorption efficiency of the shock absorbing member 20 is improved.

When the recess is arranged in the vertical direction, if the load from the occupant on the shock absorbing member is input from the rear, the recess may fall forward and the load may not be absorbed properly. In the shock absorbing member 20, since the recesses (first recess 26 and second recess 27) are inclined, when a load from the occupant is input from the rear, the recesses are stepped on and buckled, so that the load is appropriately applied. Be absorbed.

The first recess 26 and the second recess 27 of the shock absorbing member 20 are formed in an oval shape extending in the front-rear direction, and since there are no corners, the moldability (shape) of the shock absorbing member 20 is stable. Therefore, the impact absorption effect becomes more stable. Further, since the first recess 26 and the second recess 27 have an oval shape extending in the front-rear direction, the rigidity of the shock absorbing member 20 in the front-rear direction is improved, so that the shock absorption efficiency in the front-rear direction is improved. ..

As shown in FIG. 4A, the first bottom surface 26a and the second bottom surface 27a are in contact with each other in the vertical direction. Since the first bottom surface 26a and the second bottom surface 27a are in contact with each other, the rigidity is improved, so that the shock absorption efficiency is improved. Further, when the thickness of the bottom surface portion in the recess is increased, the rigidity is improved, so that the shock absorption efficiency is improved.

As shown in FIG. 4B, the first bottom surface 26a and the second bottom surface 27a are separated from each other in the vertical direction, and a gap C (space) is formed between the first bottom surface 26a and the second bottom surface 27a. You may be. Since the first bottom surface 26a and the second bottom surface 27a are separated from each other in the vertical direction to form a gap C, the gap C as a space portion functions as an elastic deformation region, so that shock absorption can be easily adjusted. ..

As shown in FIGS. 4A and 4B, inside the shock absorbing member 20, a first space portion K1 is formed in front of the first recess 26 and the second recess 27, and the first recess 26 and the second recess 27 are formed. A second space portion K2 is formed behind the above. The front first space portion K1 is provided with a larger volume and height than the rear second space portion K2. Due to the difference in size between the first space portion K1 and the second space portion K2, the flexibility of the shock absorbing member 20 in the front and the rear changes, so that the shock absorbing efficiency is improved. The front first space portion K1 may be provided with a smaller volume and height than the rear second space portion K2.

As shown in FIGS. 4A and 4B, at the center position of the oval shape of the first recess 26, the distance (a) from the upper surface 21 of the first bottom surface 26a of the first recess 26 is the first of the second recess 27. 2 It is preferable that the bottom surface 27a is provided at a position larger than the distance (b) from the lower surface 22 (that is, a> b). In other words, at the center positions of the first recess 26 and the second recess 27 in the front-rear direction, the height (a) of the first recess 26 from the first bottom surface 26a is the height of the second recess 27 from the second bottom surface 27a. It is preferable that the height is higher than (b).

According to such a configuration, the lower rigidity of the shock absorbing member 20 is higher than the upper rigidity, so that it is possible to effectively absorb the shock when the load is input from the occupant. At the center position of the oval shape of the first recess 26, the distance (a) from the upper surface 21 of the first bottom surface 26a of the first recess 26 is the distance from the lower surface 22 of the second bottom surface 27a of the second recess 27. It may be provided at a position smaller than (b) (that is, a <b).

A plurality (two each) of the first recess 26 and the second recess 27 are provided near the center of the shock absorbing member 20 in the seat width direction. By arranging the recess near the center of the shock absorbing member 20, it is possible to stably absorb the shock.

The first recess 26 and the second recess 27 are arranged between the center of the vehicle seat S and the pair of seat cushion side frames S14 in the seat width direction. Since the recess of the shock absorbing member 20 is arranged between the center of the vehicle seat S (that is, the seating portion of the occupant) and the pair of side frames (seat cushion side frame S14), the shock can be absorbed stably. It will be possible.

The seat cushion pad S11 is covered with a trim cover S12 as a skin material, and the shock absorbing member 20 and the recesses (the first recess 26 and the second recess 27) are the suspension portions T1 to T3 of the trim cover S12. It is placed in a position that avoids. Specifically, in the top view of the seat cushion S1, the shock absorbing member 20 and the recesses (the first recess 26 and the second recess 27) are the first suspension portion T1 (right side suspension portion) in the seat width direction. It is arranged between the second suspension portion T2 (left suspension portion), and is arranged in front of the third suspension portion T3 (rear suspension portion) in the front-rear direction. According to such a configuration, when the load at the time of shock absorption is transmitted to the shock absorbing member 20, the influence of the hanging portions T1 to T3 is suppressed.

Further, as shown in FIG. 4C, an upper groove portion 21b may be provided on the upper surface 21 of the shock absorbing member 20, and a lower groove portion 22b may be provided on the lower surface 22 of the shock absorbing member 20. By providing at least one of the upper groove portion 21b and the lower groove portion 22b, the rigidity of the shock absorbing member 20 is improved. At this time, the efficiency of position regulation of the shock absorbing member 20 is also improved.

The upper groove portion 21b and the lower groove portion 22b are preferably provided in front of the center in the front-rear direction of the shock absorbing member 20. Further, the upper groove portion 21b is preferably provided in front of the first recess 26, and the lower groove portion 22b is preferably provided in front of the second recess 27. At this time, it is preferable that the upper groove portion 21b and the lower groove portion 22b are formed so as to extend until they reach the front surface 23 of the shock absorbing member 20.

As shown in FIG. 4C, the front position regulating member P may be arranged in front of the shock absorbing member 20. The front position regulating member P includes a lower position regulating portion P1 (for example, a flat portion 11) that abuts on the lower surface 22 of the shock absorbing member 20 and a front position regulating portion P2 (for example, a protrusion) that abuts on the front surface 23 of the shock absorbing member 20. It is formed with a portion 12).

[3. Modification example]
The present invention is not limited to the above embodiments. Hereinafter, a modified example of the shock absorbing member according to the present embodiment will be described with reference to FIGS. 5A to 8. In the following description, the description of the points common to the above-described embodiment will be omitted, and the points different from the above-described embodiment will be mainly described.

The shock absorbing member 120 shown in FIGS. 5A to 8 is surrounded by an upper surface 121 and a lower surface 122 in the vertical direction, a front surface 123 and a rear surface 124 in the front-rear direction, and a first side surface 125a and a second side surface 125b in the seat width direction. It has a hollow shape. Further, the upper surface 121 of the shock absorbing member 120 is formed with an inclined surface 121a that is inclined downward toward the rear.

As shown in FIGS. 5A and 7, an upper groove portion 121b extending in the front-rear direction is formed on the upper surface 121 of the shock absorbing member 120. By forming the upper groove portion 121b, the shock absorption efficiency on the upper surface 121 of the shock absorbing member 120 is improved. Further, since the upper groove portion 121b is formed so as to extend from the front end of the front surface 123 and connect to the first recess 126, the impact absorption efficiency on the upper surface 121 of the shock absorbing member 120 is further improved.

As shown in FIGS. 5A and 8, a lower groove portion 122b extending in the front-rear direction is formed on the lower surface 122 of the shock absorbing member 120. By forming the lower groove portion 122b, the shock absorption efficiency on the lower surface 122 of the shock absorbing member 120 is improved. Further, since the lower groove portion 122b is formed so as to extend from the front end of the front surface 123 and connect to the second recess 127, the impact absorption efficiency on the lower surface 122 of the shock absorbing member 120 is further improved.

As shown in FIGS. 5A to 7, a front groove portion 123a extending in the vertical direction is formed on the front surface 123 of the shock absorbing member 120. Since the front groove portion 123a is formed, the shock absorption efficiency on the front surface 123 of the shock absorbing member 120 is improved.

In the seat width direction, the upper groove portion 121b and the lower groove portion 122b are arranged at substantially the same position (FIG. 6A). In the seat width direction, the upper groove portion 121b is arranged between two adjacent front groove portions 123a (FIG. 7). Similarly, in the seat width direction, the lower groove portion 122b is arranged between two adjacent front groove portions 123a (FIG. 8).

As shown in FIGS. 5B and 5C, a bottom surface portion 123b may be added to the front groove portion 123a of the shock absorbing member 120. The front groove portion 123a, the upper groove portion 121b, and the lower groove portion 122b are provided, and the rigidity of the front groove portion 123a is improved by the presence of the bottom surface portion 123b, so that deformation and crushing of the front portion of the shock absorbing member 120 are suppressed. , The efficiency of position regulation when performing shock absorption is also improved.

Further, as shown in FIGS. 5B and 5C, a taper may be formed on the first side surface 125a and the second side surface 125b so as to widen toward the outside in the seat width direction. If the taper is formed, it is preferable because it is easy to die-cut at the time of molding.

Further, as shown in FIG. 7, the front position regulating member P may be arranged in front of the shock absorbing member 120. The front position restricting member PX is a member that restricts the shock absorbing member 120 from moving forward (especially at the time of a collision). Examples of the front position regulating member PX include, but are not limited to, a floor surface that supports the vehicle seat from below and a seat frame surface that the vehicle seat includes.

The vehicle seat according to the present embodiment has been described above by taking a vehicle seat as an example. The seat cushion according to the present embodiment is particularly used as long as it is a seat cushion of a seat that can cause an impact on the seated person, particularly a seat cushion of a seat that can sink into the lumbar region of the seated person when an impact is generated. There are no restrictions on. 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 seats (vehicle seats)
S1 Seat cushion S11 Seat cushion pad S11a Lower surface S11b Pad recess S12 Trim cover T1 First hanging part (right side hanging part)
T2 Second hanging part (left hanging part)
T3 Third hanging part (rear hanging part)
S14 Seat Cushion Side Frame (Side Frame, Seat Cushion Frame)
S2 Seat back S3 Headrest 10 Plate-shaped member (support member)
11 Flat part 12 Protruding part (subduction suppression member)
13 Front bent part (bent part)
20 Shock absorbing member 21 Top surface 21a Inclined surface 22 Bottom surface 23 Front surface 24 Rear surface 25a First side surface 25b Second side surface 26 First recess (recess)
26a 1st bottom surface 27 2nd recess (recess)
27a First bottom surface K1 Front space K2 Rear space C Gap (space)
P, PX Front position regulating member P1 Lower position regulating part P2 Front position regulating part 120 Shock absorbing member 121 Upper surface 121a Inclined surface 121b Upper groove portion 122 Lower surface 122b Lower groove portion 123 Front surface 123a Front groove portion 123b Bottom surface portion 124 Rear surface 125a First side surface 125b 2 Side surface 126 1st recess (recess)
126a 1st bottom surface 127 2nd recess (recess)
127a First bottom surface

Claims (13)

A vehicle seat with a seat cushion
The seat cushion
A seat cushion frame having a pair of side frames provided apart from each other in the width direction of the vehicle seat, and a seat cushion frame.
The seat cushion pad placed on the seat cushion frame and
It has a shock absorbing member provided below the seat cushion pad, and has.
The shock absorbing member is provided with a recess having a bottom surface.
A vehicle seat characterized in that the bottom surface of the recess is inclined downward from the front to the rear of the vehicle seat. The recess is a first recess provided on the upper surface side of the shock absorbing member.
The vehicle seat according to claim 1, wherein the first recess has an oval shape extending in the front-rear direction of the vehicle seat. The recess is a second recess provided on the lower surface side of the shock absorbing member.
The vehicle seat according to claim 1 or 2, wherein the second recess has an oval shape extending in the front-rear direction of the vehicle seat. The vehicle seat according to claim 2, wherein the first recess is provided with a first bottom surface that is inclined from the front to the rear of the vehicle seat. The vehicle seat according to claim 3, wherein the second recess is provided with a second bottom surface that is inclined from the front to the rear of the vehicle seat. The recess includes a first recess provided on the upper surface side of the shock absorbing member and a second recess provided on the lower surface side of the shock absorbing member.
A first bottom surface is provided in the first recess.
A second bottom surface is provided in the second recess.
The first bottom surface and the second bottom surface are separated from each other in the vertical direction of the vehicle seat, and a space portion is formed between the first bottom surface and the second bottom surface. The vehicle seat according to any one of 1 to 5. The recess includes a first recess provided on the upper surface side of the shock absorbing member and a second recess provided on the lower surface side of the shock absorbing member.
A first bottom surface is provided in the first recess.
A second bottom surface is provided in the second recess.
The vehicle sheet according to any one of claims 1 to 5, wherein the first bottom surface and the second bottom surface are in contact with each other in the vertical direction of the vehicle sheet. Inside the shock absorbing member, a first space portion is formed in front of the recess, and a second space portion is formed behind the recess.
The vehicle seat according to any one of claims 1 to 7, wherein the first space portion is provided larger than the second space portion. The vehicle seat according to any one of claims 1 to 8, wherein a front groove portion extending in the vertical direction of the vehicle seat is formed on the front surface of the shock absorbing member. The vehicle seat according to any one of claims 1 to 9, wherein an upper groove portion extending in the front-rear direction of the vehicle seat is formed on the upper surface of the shock absorbing member. The vehicle seat according to any one of claims 1 to 10, wherein a lower groove portion extending in the front-rear direction of the vehicle seat is formed on the lower surface of the shock absorbing member. The vehicle seat according to claim 10, wherein the upper groove portion is formed so as to be connected to the recess. The vehicle seat according to claim 11, wherein the lower groove portion is formed so as to be connected to the recess.

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