Seat

Abstract

To provide a seat capable of suppressing whiplash injury of a front seat occupant at the time of a rear-end collision and suppressing head injury of a rear seat occupant at the time of a front-end collision.SOLUTION: A seat 1 having a headrest part 30 comprises: left and right frames 31L, 31R provided on left and right side parts of the headrest part; and a left shock absorbing member 40L and a right shock absorbing member 40R attached to the left and right frames. Therein: the left shock absorbing member includes a left input receiving surface part 41L and a left connecting part 43L; the right shock absorbing member includes a right input receiving surface part 41R and a right connecting part 43R; an end part of the left connecting part on the left input receiving surface part side is arranged on a vehicle front and right side with respect to a connection position between the left connecting part and the left frame; an end part of the right connecting part on the right input receiving surface part side is arranged on a vehicle front and left side with respect to a connection position between the right connecting part and the right frame; and the left and right input receiving surface parts are arranged at an interval in a lateral direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a seat provided in a moving body such as a vehicle. [Background technology]

[0002] For example, Patent Document 1 describes technology relating to the surrounding area of ​​headrests in vehicle seats such as automobiles, in which a headrest reinforcing member having an internal cavity formed by alternately cutting and raising the front and rear sides is fixed to the upper part of a backrest frame member or formed integrally with the backrest frame member, and a cushioning material molded as a continuous unit or as separate front and rear parts comprising a bag-shaped portion for storing the reinforcing member inside, a back portion covering the back-shaped portion of the backrest, and shoulder portions covering both shoulders of the backrest is externally fitted onto the reinforcing member and the backrest frame member. Patent Document 2 describes a headrest device for a vehicle seat having a stay held by the seat back and an internal body connected to the stay and installed within the pad, the internal body having a central support portion that supports the pad at approximately the center and lateral support portions that support the pad on both sides, the lateral support portions being curved so as to be concave toward the front, such that the central support portion is curved and formed in a protruding shape so as to be convex toward the front, and when the central support portion is pressed rearward, the lateral support portion rotates forward around the connection point between the stay and a rear surface portion that is curved so as to be concave toward the front. Patent Document 3 discloses a headrest that is provided at an upper position of a seat back of a vehicle seat and supports the head of an occupant, the headrest having an occupant rear support portion that supports the rear of the occupant's head, side head support portions that are located on both sides of the occupant rear support portion and support the sides of the occupant's head, and a movable mechanism having an operating structure that can move the side head support portions in the front-rear direction relative to the occupant rear support portion, the movable mechanism having a swinging member that is arranged between the occupant rear support portion and the side head support portion so as to be swingable, and each swinging member presses each side head support portion with a surface portion on one side that swings forward during the swinging movement of the swinging member, thereby moving the side head support portion. The seat cushion is configured so that the side support position where the supporting portion supports the side of the occupant's head is moved forward, and the surface portion on the other side that swings rearward presses against the occipital support portion to move backward the occipital support position where the occipital support portion supports the occipital head of the occupant, and each oscillating member oscillates across the interior of the occipital support portion and each side support portion, and the driving for oscillating each oscillating member is achieved by inflating and deploying an airbag disposed on the back side of the surface portion on one side that swings forward of each oscillating member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jpn. Jpn. Published No. 11928, Showa 54 [Patent Document 2] Patent No. 4075452 [Patent Document 3] Patent No. 5087960 Summary of the Invention [Problem to be solved by the invention]

[0004] In vehicles with multiple seats in the front-to-rear direction, the headrest portion of the front seats is an important part in preventing whiplash injuries to front seat occupants in the event of a rear-end collision (when hit from behind), and in preventing injuries caused by head collisions to rear seat occupants in the event of a frontal collision. In view of the above problems, an object of the present invention is to provide a seat that reduces whiplash injuries to front seat occupants in the event of a rear collision and reduces head injuries to rear seat occupants in the event of a frontal collision. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, a seat according to one aspect of the present invention is a seat having a headrest portion provided behind the head of a seated occupant, the seat including a left frame and a right frame provided on the left and right sides of the headrest portion, a left impact absorbing member attached to the left frame, and a right impact absorbing member attached to the right frame, the left impact absorbing member having a left input receiving surface portion disposed opposite the rear of the head of the occupant, and a left connecting portion connecting a left end portion of the left input receiving surface portion to the left frame, the right end of the right input surface portion is disposed opposite the back of the head of the driver, and a right connecting portion that connects a right side end of the right input surface portion to the right frame, the end of the left connecting portion facing the left input surface portion is disposed in front of and to the right of the connection point between the left connecting portion and the left frame, the end of the right connecting portion facing the right input surface portion is disposed in front of and to the left of the connection point between the right connecting portion and the right frame, and the right side end of the left input surface portion and the left side end of the right input surface portion are disposed at a distance in the left-right direction. According to this, in the event of a rear-end collision of the vehicle, the back of the head of the occupant seated in the seat is pushed into the headrest from the front, transmitting a load to the left and right input surfaces of the left and right impact absorbing members. As a result, the connecting parts of each impact absorbing member bend and the input surfaces are deformed in a direction to move backward, absorbing energy. This reduces whiplash injuries to the occupant. On the other hand, in the event of a frontal collision, the head of an occupant seated at the rear of the seat is pushed into the headrest from behind, transmitting a load to the respective input surfaces of the impact absorbing members. As a result, the respective connecting parts of the impact absorbing members bend and the respective input surfaces deform in the forward direction to absorb the energy. This reduces head injuries to rear seat occupants.

[0006] In the present invention, an elastic member may be provided on the front side of the left impact absorbing member and the right impact member, and the elastic member may be formed with an inclined portion that guides the head of the occupant toward the center. According to this, when the occupant's head is offset left or right during a rear-end collision, the occupant's head is guided toward the center, allowing the load to be appropriately transmitted to each input-receiving surface of each impact absorbing member, thereby appropriately obtaining the above-mentioned effects.

[0007] In the present invention, the left input surface portion and the left connecting portion of the left impact absorbing member can be integrally formed into a plate-like shape, and the right input surface portion and the right connecting portion of the right impact absorbing member can be integrally formed into a plate-like shape. This allows the number of parts to be reduced and the configuration to be simplified.

[0008] In the present invention, the left impact absorbing member and the right impact absorbing member may be configured to be arranged in a plurality of members in a vertical direction. This makes it possible to accommodate occupants of a wide range of body sizes without providing a lifting mechanism in the headrest portion. This eliminates the need to place a hard part such as a cross member on the upper end of the backrest, and makes it possible to prevent injury to rear seat passengers due to collision with hard parts.

[0009] In the present invention, an opening penetrating the headrest portion in the front-rear direction may be provided in the space between the right end portion of the left input surface portion and the left end portion of the right input surface portion of the headrest portion. This improves visibility within the vehicle cabin and reduces discomfort caused by the hairstyle. Effect of the Invention

[0010] As described above, according to the present invention, it is possible to provide a seat that reduces whiplash injuries to front seat occupants in the event of a rear collision, and also reduces head injuries to rear seat occupants in the event of a frontal collision. [Brief description of the drawings]

[0011] [Figure 1] 1 is an external perspective view of a seat frame in an embodiment of a seat to which the present invention is applied; [Diagram 2] 2 is a front view of a seat frame of the seat according to the embodiment, as viewed from the front side of the vehicle. FIG. [Diagram 3] FIG. 2 is a side view of a seat frame in the seat according to the embodiment. [Figure 4] 3 is a schematic plan view of the impact absorbing member and its surroundings of the seat according to the embodiment, as viewed from above. FIG. [Diagram 5] FIG. 2 is a diagram showing a state in which an occupant is seated in the rear seat of the seat of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of a seat to which the present invention is applied will be described. The seat of the embodiment is installed in a vehicle such as a passenger car, and an occupant sits in the seat. The vehicle is configured with a plurality of rows of seats arranged in the front-rear direction, and the seat of the embodiment is used as a front seat (a seat in which other passengers sit at the rear).

[0013] FIG. 1 is an external perspective view of a seat frame in a seat according to an embodiment. FIG. 2 is a front view of a seat frame in the seat according to the embodiment, as viewed from the front side of the vehicle. FIG. 3 is a side view of a seat frame in the seat according to the embodiment. The seat 1 of the embodiment is configured by providing a cushion made of an elastic body such as urethane foam resin, and a seat cover on the surface of a seat frame described below.

[0014] The seat 1 has a seat surface portion 10, a backrest portion 20, a headrest portion 30, and the like. The seat surface 10 is a portion on which the thighs, buttocks, and lower back of the occupant P are placed. The backrest portion 20 is disposed opposite the back surface of the occupant P. The backrest portion 20 is formed so as to protrude upward from the vicinity of the rear end portion of the seat portion 10.

[0015] In the backrest portion 20, the seat frame has a side member 21, a cross member 22, and the like. The side members 21 are members provided at the left and right end portions of the backrest portion 20 and extend in the up-down direction. The cross member 22 is a beam-shaped member provided by connecting the left and right side members 21 at the intermediate portion in the height direction of the backrest portion 20.

[0016] The headrest portion 30 is a portion that is disposed behind the head of the occupant P. The headrest portion 30 is provided on the upper part of the backrest portion 20. In the headrest portion 30, the seat frame has a left side member 31L, a right side member 31R, an upper member 32, and the like. The left side member 31L and the right side member 31R are members provided on the left and right ends of the headrest portion 30 and extend in the up-down direction. The upper member 32 is a member extending in the left-right direction between the upper ends of the left side member 31L and the right side member 31R. The left side member 31L, the right side member 31R and the upper member 32 can be integrally formed, for example, by bending a single steel circular pipe. The lower ends of the left side member 31L and the right side member 31R are connected to the upper ends of the left and right side members 21, respectively. The lower halves of the left side member 31L and the right side member 31R are disposed at an angle to each other so that the distance therebetween in the left-right direction gradually increases from above to below.

[0017] The headrest portion 30 is provided with an impact absorbing member, which will be described below, in order to reduce whiplash injuries to the occupant P in the event of a rear collision of the vehicle, and to reduce head injuries to the rear seat occupant PB in the event of a frontal collision of the vehicle. The left side member 31L is provided with, in order from above, an upper-left impact absorbing member 40L, a middle-left impact absorbing member 50L, and a lower-left impact absorbing member 60L. The right side member 31R is provided with, in order from the top, an upper right impact absorbing member 40R, a middle right impact absorbing member 50R, and a lower right impact absorbing member 60R. The left and right shock absorbing members of each stage are provided symmetrically at the same height.

[0018] FIG. 4 is a schematic plan view of the impact absorbing member and its periphery as viewed from above. The upper left impact absorbing member 40L has a flat portion 41L, a fixed portion 42L, a connecting portion 43L, and the like. The flat portion 41L, the fixed portion 42L, and the connecting portion 43L can be integrally formed, for example, by pressing a common steel panel. The flat portion 41L is a surface portion disposed on the rear side of the left half of the occupant P's back head. The flat portion 41L is the left input surface portion of the present invention. The flat portion 41L is formed in a planar shape extending in the up-down and left-right directions.

[0019] The fixing portion 42L is a portion where the left upper stage impact absorbing member 40L is fixed to the left side member 31L. The fixing portion 42L is fixed to a surface portion of the left side member 31L on the vehicle rear side by, for example, welding.

[0020] The connecting portion 43L is a stay-shaped portion that connects the left end of the flat portion 41L and the right end of the fixed portion 42L. The connecting portion 43L extends in a direction inclined with respect to the vehicle longitudinal direction and left-right direction so that the end portion on the flat portion 41L side is on the front side and right side of the vehicle with respect to the end portion on the fixed portion 42L side.

[0021] The upper right shock absorbing member 40R has a flat portion 41R, a fixed portion 42R, a connecting portion 43R, etc., which are arranged symmetrically with the upper left shock absorbing member 40L described above. The right end of the flat portion 41L and the left end of the flat portion 41R are disposed opposite each other with a gap therebetween in the left-right direction.

[0022] The left middle shock absorbing member 50L and the right middle shock absorbing member 50R have a similar configuration to the left upper shock absorbing member 40R and the right upper shock absorbing member 40L, and are positioned lower than the left upper shock absorbing member 40R and the right upper shock absorbing member 40L. The lower left impact absorbing member 60L and lower right impact absorbing member 60R have a similar configuration to the upper left impact absorbing member 40R and upper right impact absorbing member 40L, and are positioned lower than the middle left impact absorbing member 50L and middle right impact absorbing member 50R. Due to the inclination of the lower halves of the left and right side members 31L and 31R described above, the left and right widths of the flat portions of the lower-left and lower-right impact absorbing members 60L and 60R are wider than those of the upper-left and upper-right impact absorbing members 40R, 40L, middle-left and middle-right impact absorbing members 50L and 50R.

[0023] Additionally, a cushion 70 made of an elastic material such as urethane foam resin is provided around the seat frame. A cushion 70 around the headrest 30 is provided with an opening 71 and a slope 72 . The opening 71 is formed penetrating the headrest 30 in the front-rear direction. The opening 71 is formed in the space between the left and right impact absorbing members. The inclined surfaces 72 are provided in the areas where the cushion 70 comes into contact with the rear of the head of the occupant P (on both sides of the opening 71). The sloped portion 72 is formed such that the vicinity of the opening 71 is set back further rearward than other portions of the vehicle so as to guide the rear of the head toward the opening 71 when the rear of the head hits the cushion 70 in a rear-end collision, for example.

[0024] In a vehicle having the seat 1 of the embodiment, in the event of a rear-end collision (rear-end collision), the back of the head of the occupant P is guided toward the center by the inclined portion 72 and pushed into the headrest 30, and the load is transmitted to the flat portion of the impact absorbing member on either the upper, middle or lower level. As a result, the shock absorbing member exhibits deformation in which the connecting portion bends and the flat portion retreats, thereby absorbing the energy of the collision.

[0025] Moreover, the seat 1 of the embodiment has a function of protecting the heads of rear seat passengers in the event of a frontal collision of the vehicle. FIG. 5 is a diagram showing a state in which an occupant is seated in the rear seat of the seat according to the embodiment. When the body of the rear seat passenger PB moves forward relative to the vehicle body due to a frontal collision, the head strikes the seat 1 from the rear side of the headrest portion 30. At this time, the head of the rear seat passenger PB is pushed into the headrest 30 and transmits the load to the flat portion of the impact absorbing member at either the upper, middle or lower stage. As a result, the shock absorbing member exhibits deformation in which the connecting portion bends and the flat portion moves forward, absorbing the energy of a collision.

[0026] According to the embodiment described above, the following effects can be obtained. (1) In the event of a rear-end collision, the back of the head of an occupant P seated in the seat 1 is pushed from the front into the headrest 30, transmitting the load to the flat parts of the left and right impact absorbing members. As a result, the connecting parts of the impact absorbing members bend and the flat parts deform in a backward direction to absorb the energy. This reduces whiplash injuries to the occupant. On the other hand, in the event of a frontal collision of the vehicle, the head of the rear seat passenger PB is pushed into the headrest portion 30 from the rear side, transmitting the load to each flat portion of each impact absorbing member. As a result, each connecting portion of each impact absorbing member bends and each flat portion deforms in a forward direction to absorb energy. This reduces head injury to the rear seat passenger PB. (2) A cushion 70 is provided on the front side of the left and right impact absorbing members, and the cushion 70 has an inclined portion formed thereon to guide the head of the occupant P toward the center. Therefore, when the head of the occupant P is offset in the left-right direction during a rear-end collision, the head of the occupant P is guided toward the center, thereby allowing the load to be appropriately transmitted to each flat portion of each impact absorbing member, and the above-mentioned effects can be appropriately obtained. (3) The flat portion (the input surface portion) and the connecting portion of each impact absorbing member are integrally formed into a plate shape, so that the number of parts can be reduced and the structure can be simplified. (4) By arranging a plurality of left and right impact absorbing members in the vertical direction, the headrest 30 can be adapted to accommodate a wide range of occupants of different body sizes without providing a lifting mechanism. This eliminates the need to place a hard part such as a cross member on the upper end of the backrest portion 30, making it possible to prevent injury to rear seat passengers due to collision with hard parts. (5) By providing an opening 71 penetrating the headrest portion 30 in the front-to-rear direction between the left and right cushions 70 in the headrest portion 30, visibility within the vehicle cabin can be improved and discomfort caused by hairstyle can be reduced.

[0027] (Modification) The present invention is not limited to the above-described embodiment, and various modifications and variations are possible, which are also within the technical scope of the present invention. (1) The shape, structure, material, manufacturing method, quantity, arrangement, and the like of each member constituting the seat are not limited to the above-described embodiment and may be modified as appropriate. (2) In the embodiment, for example, three upper and lower stages of shock absorbing members are provided, but the number of stages of the shock absorbing members is not limited to this and can be changed as appropriate. [Explanation of symbols]

[0028] 1 Seat 10 Seat 20 Backrest section 21 Side member 22 Cross member 30 Headrest section 31L Left side member 31R Right side member 32 Upper member 40L Upper left shock absorbing member 41L Flat part 42L Fixed part 43L Connecting part 40R Upper right shock absorbing member 41R Flat part 42R Fixed part 43R Connecting part 50L Left middle shock absorbing member 50R Right middle shock absorbing member 60L Left lower shock absorbing member 60R Right lower shock absorbing member 70 Cushion 71 Opening 72 Slope P Passenger PB Rear seat passenger

Claims

1. A seat having a headrest portion provided behind the head of a seated occupant, A left frame and a right frame provided on the left and right sides of the headrest portion; a left impact absorbing member attached to the left frame; a right impact absorbing member attached to the right frame; Equipped with the left impact absorbing member has a left input surface portion disposed opposite the rear head of the occupant, and a left connecting portion connecting a left end portion of the left input surface portion to the left frame, the right impact absorbing member has a right input surface portion disposed opposite the rear head of the occupant, and a right connecting portion connecting a right end portion of the right input surface portion to the right frame, an end portion of the left connecting portion on the left input surface portion side is disposed in front of and to the right of a connecting portion between the left connecting portion and the left frame, an end portion of the right connecting portion on the right input surface portion side is disposed in front of and to the left of a connecting portion between the right connecting portion and the right frame, The right end of the left input surface portion and the left end of the right input surface portion are disposed with a gap therebetween in the left-right direction. A seat characterized by:

2. An elastic member is provided on the front side of the left impact absorbing member and the right impact member, The elastic member has a slope that guides the head of the occupant toward the center. The sheet according to claim 1 ,

3. The left input surface portion and the left connecting portion of the left impact absorbing member are integrally formed into a plate shape, The right input surface portion and the right connecting portion of the right impact absorbing member are integrally formed into a plate shape. The sheet according to claim 1 or 2, characterized in that

4. The left impact absorbing member and the right impact absorbing member are arranged in a plurality of positions in the vertical direction. The sheet according to claim 1 or 2, characterized in that

5. An opening penetrating the headrest in the front-rear direction is provided in the headrest between the right end of the left input surface portion and the left end of the right input surface portion. The sheet according to claim 1 or 2, characterized in that

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