JP2015199366A - vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat having a structure in which a side airbag can be developed smoothly by preventing the side airbag being developed from being hooked on a folded-back part.SOLUTION: In a vehicle seat 10, a seat back 30 or a seat cushion is provided with: a seat shell 32 as a structure that has a rear surface supporting part 32s and a side part 32f which is raised to support the side of a seated occupant from the rear surface supporting part 32s; and a side airbag 50 installed on an opposite surface of a seating surface of the side part 32f. On the opposite surface of the seating surface of the side part 32f, at a position close to an a developing direction of the side airbag 50 is arranged a rib 60 extending along a direction in which the side part 32f is raised. When the side airbag 50 is developed, a terminal part 61 of the rib 60 contacts the side airbag being developed and guides the developing direction so that the airbag is not hooked on a folded-back part 32j.

Description

  The present invention relates to a vehicle seat including a seat shell as a structure.

  A vehicle seat having a seat shell as a structure is known. The seat shell is formed in a concave shape that fits the outer shape of the upper body of the seated occupant, and a side support that supports the rear surface of the seated person and a side that stands up to support the side of the seated person from the rear surface supporting part. And a standing wall portion.

  There is one in which a folded portion is formed by folding the terminal of the side standing wall portion from the seating surface side to the opposite surface side of the seating surface. By stretching the seat cover along the folded portion, the seat cover can be attached with good appearance without slackening. Moreover, since the terminal of a side standing wall part becomes a rounded shape by providing a folding | returning part, the feeling when the seated person who gets on and off touches the side standing wall part can be improved. Moreover, since the folding | returning part is extended along the up-down direction of a side standing wall part, the bending rigidity of the up-down direction of a side standing wall part can be improved.

  A side airbag may be attached to the seat shell in order to improve the protection performance of the seated person at the time of a side collision. The side airbag is inflated from an outer portion of the vehicle seat at the time of a side collision of the vehicle, and protects the occupant's head, chest, and waist from the side. In the invention disclosed in Patent Document 1, a seat shell is provided so as to cover the rear surface of the seat back, and a side airbag is attached to the opposite side of the seating surface of the side standing wall portion of the seat shell.

JP 2007-76642 A

  At the time of a side collision, the side airbag is deployed forward along the opposite side of the seating surface of the side standing wall so as to be positioned on the side of the seated person. At this time, the deploying side airbag may be caught by the folded portion. In this case, the deployment direction of the side airbag may not be as planned.

  In view of such a problem, an object of the present invention is to prevent a deployed side airbag from being caught by a folded portion in a vehicle seat including a seat shell provided with a folded portion at a terminal of a side standing wall portion. Thus, it is to provide a structure capable of smoothly deploying the side airbag.

  According to a first aspect of the present invention, there is provided a seat shell as a structure having a rear surface support portion for supporting a rear surface of a seated person and a side portion rising from the rear surface support portion to support a side surface of the seated person, and seating of the side portion. A side airbag that is attached to the opposite side of the surface, and a seat back or a seat cushion is provided, and on the side portion, the terminal of the side portion is folded from the seating surface side toward the opposite surface side of the seating surface. The vehicle seat is provided with a folded portion formed by the above-mentioned side, on the opposite side of the seating surface of the side portion, at a position closer to the deployment direction side of the side airbag than the side airbag. Ribs extending along the rising direction of the portion are disposed, and when the side airbag is deployed, the end portion of the rib comes into contact with the side airbag being deployed, and the side air Bag is characterized in that to guide the deployment direction of the side air bag not to catch on the folded portion.

  According to the first invention, when the side airbag is deployed, the end portion of the rib comes into contact with the side airbag being deployed so that the deployment direction of the side airbag is not caught by the folded portion. Can guide. Therefore, it is possible to prohibit the side airbag from being deployed in an unexpected direction. Further, ribs extending along the rising direction of the side portions are disposed on the side portions of the seat shell. For this reason, the rigidity with respect to the moment which expands a side part to the left-right direction outer side is improved. Therefore, even if the seated person's body presses the side part at the time of a side collision, the side part is hardly deformed, and the deployment path of the side airbag is hardly blocked.

  2nd invention of this invention is a vehicle seat in 1st invention, Comprising: The said rib is arrange | positioned so that a part of said folding | returning part and the wall part facing the said folding | returning part may be connected. And the terminal part of the said rib is in the state inclined so that it might protrude toward the left-right direction outer side of the said seat shell as it leaves | separates from the location where the said side airbag is attached.

  There is a possibility that the side airbag being deployed fits between the folded portion and the wall portion facing the folded portion. According to the second invention, a space between the folded portion and the wall portion facing the folded portion is closed by the rib, and the side airbag in contact with the end portion of the rib is the seat shell. Head outward in the left-right direction. Therefore, the side airbag being deployed does not fit between the folded portion and the wall portion facing the folded portion.

  According to the present invention, the side airbag can be smoothly deployed by preventing the side airbag being deployed from being caught by the folded portion.

It is the perspective view which looked at the vehicle seat which concerns on one Embodiment of this invention from diagonally back. It is the figure which looked at the structure of the seat back periphery of the vehicle seat which concerns on the said embodiment from the side. FIG. 3 is an enlarged view of only the left side structure in the sectional view taken along the line III-III in FIG. 2. It is the figure which showed the operation | movement which a side airbag (bag body) expand | deploys in the vehicle seat which concerns on the said embodiment.

  1 to 4 show an embodiment of the present invention. The vehicle seat 10 of the present embodiment includes a seat cushion 20 on which an occupant sits and a seat back 30 that serves as a backrest. The seat cushion 20 is a cushion pad that is placed on an iron cushion frame and covered with an outer skin, and elastically supports the load of the seated person. The seat back 30 supports the back surface of the seated person with a back pad 33 that is placed on a shell-type back pan 32 and is covered with a skin. In each figure, each direction of the vehicle when the vehicle seat 10 is attached is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIG. 1, the seat cushion 20 is attached to the floor F through a slide rail 21 so that the position of the seat cushion 20 can be adjusted in the front-rear direction. A cushion frame (not shown) is attached to the lower arm 22 connected to the slide rail 21. A cushion pad made of urethane foam, which is a cushion material, is placed on the cushion frame, and a cushion cover 23, which is a skin, is placed on the cushion pad to constitute the seat cushion 20.

  The seat back 30 includes a shell-type back pan 32, a back pad 33 placed thereon, and a back cover 34 placed thereon. A side standing wall 32f of the back pan 32 is attached to the upper arm 31 attached to the lower arm 22 via a recliner 40 with bolts and nuts. The tilt of the seat back 30 can be adjusted with respect to the seat cushion 20 by the action of the recliner 40. A side airbag module 50 is attached to the upper arm 31. The back pan 32 corresponds to a “seat shell” in the claims.

  As shown in FIG. 1, a concave shape is formed on the front surface (sitting surface) side of the back pan 32 so as to conform to the upper body outline of the seated person. The back pan 32 supports a rear surface support portion 32s that supports the back of the seated person, a side standing wall portion 32f that rises forward to support the waist of the seated person from both the left and right sides, and the shoulder portion of the seated person. A shoulder support portion 32h extending outward in the left and right sides as much as possible and a head support portion 32i extending upward in order to support the head of the seated person are formed. The back pan 32 is provided with two belt holes 32e for passing the seat belt at positions corresponding to the upper shoulders of the seated person. As shown in FIG. 3, the terminal portion of the back pan 32 is formed with a folded portion 32j by folding the terminal portion backward. A rib 60 is provided on the side standing wall 32f. A cover member 35 is attached to the side standing wall 32f and covers the upper arm 31, the rib 60, and the side airbag module 50 as shown in FIG. 1 and 2, the cover member 35 is omitted for convenience of explanation. The side standing wall portion 32f corresponds to a “side portion” in the claims.

  The back pan 32 is manufactured using a fiber reinforced plastic in which a carbon fiber having a fiber length of about 1 mm is used as a reinforcing material and polypropylene is used as a matrix resin. The mold is formed by press-fitting a pellet obtained by kneading the carbon fiber and polypropylene into a mold that forms a cavity having substantially the same shape as the back pan 32 when the upper and lower molds are closed. Then, it is a so-called injection molding in which the mold is cooled and removed.

  As shown in FIG. 2, the rib 60 is provided on the outer side in the left-right direction of the side standing wall 32f (on the opposite side of the seating surface). The rib 60 is disposed at a position in front of the side airbag module 60 (on the deployment direction side of the bag body 52). The rib 60 is provided so as to extend in the vertical direction in which the side standing wall portion 32f rises from the rear support portion 32s along the side standing wall portion 32f. The ribs 60 are formed in a flat plate shape, and nine ribs are lined up and down with the plate surface facing the vertical direction. As shown in FIG. 3, the rib 60 is provided so as to connect a portion excluding the rear end portion of the folded portion 32j and the wall portion of the side standing wall portion 32f facing the folded portion 32j. . The rear end portion 61 of the rib 60 is inclined so as to protrude outward in the left-right direction of the back pan 32 as it goes forward. The rib 60 is integrally formed when the back pan 32 is injection-molded.

  The cover member 35 is made of a fiber reinforced plastic similar to the back pan 32. As shown in FIG. 3, the rear end portion of the cover member 35 is attached to the back pan 32 with bolts and nuts. The rear wall portion of the cover member 35 is formed in a curved surface shape with a design that is smoothly continuous with the rear surface shape of the back pan 32 and has a unified appearance.

  The back pad 33 is placed on the front side (sitting surface side) of the back pan 32. The back pad 33 is made of urethane foam and functions as a cushion material that supports the weight of the seated person.

  The front side of the back pad 33 is covered with a back cover 34. A locking member 35 is attached to the end of the back cover 34. The locking member 35 is made of an elastic member having a substantially U-shaped cross section, and has an appropriate fin portion inside the substantially U-shaped cross section. As shown in FIG. 3, in the back cover 34, after the terminal of the back cover 34 is folded back along the folded portion 32j of the back pan 32, the fin portion of the locking member 35 holds the folded portion 32j. Thus, the back pan 32 is fixed. The back cover 34 is made of a jersey fabric that is breathable and easily stretchable.

  As shown in FIG. 3, the side airbag module 50 is attached to the upper arm 31 in a state of being housed in a space covered with the side standing wall portion 32 f and the cover member 35. The side airbag module 50 includes a bag body 52 that is folded compactly and an inflator (not shown) that generates inflation gas for inflating the bag body 52. When the vehicle collides sideways, the vehicle interior structure is deformed and approaches the seated person from the outside in the left-right direction. The bag body 52 expands from the outside in the left-right direction of the vehicle seat 10 before the indoor structure comes into contact with the seated person, and expands between the indoor structure and the seated person. The unfolded bag body 52 is positioned on the side of the seated person's head, chest, and waist, and protects it from coming into direct contact with the indoor structure. The bag body 52 of the side airbag module 50 corresponds to a “side airbag” in the claims.

  At the time of a side collision, a sensor provided at an appropriate location detects the side collision and operates the inflator of the side airbag module 50. The operated inflator quickly injects a bulging gas into the folded bag body 52, thereby starting forward deployment while the bag body 52 swells, and comes into contact with the rib 60. The bag body 52 in contact with the rib 60 expands outward in the left-right direction while slidingly contacting the rear end portion 61 of the rib 60, and eventually comes into contact with the inner wall surface of the front end portion of the cover member 35. Press from the inside. In response to this pressing force, the cover member 35 bends or breaks, and the front end portion of the cover member 35 is opened. As shown in FIG. 4, the bag body 52 includes the side standing wall portion 32 f and the cover member 35. Go outside the covered space. The bag body 52 expands to a predetermined position on the side of the seated person, and as shown by a two-dot chain line in FIG. 2, when the head protection part 521, the chest protection part 522, and the waist protection part 523 are formed, the bag body 52 is expanded. finish.

  The present embodiment configured as described above has the following operational effects. When the bag body 52 of the side airbag module 50 is deployed, the rear end portion 61 of the rib 60 comes into contact with the developing bag body 52. Then, the unfolded bag body 52 is guided along the rear end portion 61 of the rib 60 so as not to be caught by the folded portion 32j. Therefore, it can be prohibited that the unfolding direction of the bag body 52 is changed to an unexpected direction. Further, a rib 60 extending in the vertical direction in which the side standing wall 32f rises is disposed on the laterally outer side (opposite side of the seating surface) of the side standing wall 32f that rises substantially forward from the rear surface support portion 32s of the back pan 32. It is installed. For this reason, the rigidity with respect to the moment which expands the side standing wall part 32f to the left-right direction outside increases, and even if a seated person's body presses the side standing wall part 32f at the time of a side collision, the side standing wall part 32f is It becomes difficult to deform. Therefore, the deployment path of the bag body 52 is not easily blocked. Moreover, the rib 60 is arrange | positioned so that the part except the rear-end part of the folding | returning part 32j and the wall part facing the folding | returning part 32j may be connected. At the same time, the rear end portion 61 of the rib 60 is inclined so as to protrude outward in the left-right direction as the distance from the location (upper arm 31) where the side airbag module 50 is attached. For this reason, the bag between the folded portion 32j and the wall portion facing the folded portion 32j (groove portion) is closed by the rib 60 and is in contact with the rear end portion 61 of the rib 60. The body 52 goes outward in the left-right direction of the back pan 32. Therefore, the developing bag body 52 does not fit into the groove portion.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention.

  For example, in the present embodiment, as the material of the back pan 32, a fiber reinforced plastic using carbon short fibers as a reinforcing material and polypropylene as a matrix resin is used. However, the present invention is not limited thereto, and glass fibers may be used for the reinforcing material, another thermoplastic resin such as polyamide may be used for the matrix resin, or a thermosetting resin such as a phenol resin may be used. In addition, the reinforcing material may be formed by laminating a plurality of woven fabrics made of continuous fibers such as carbon and glass, or using a plate-like felt, and impregnating the woven fabric or felt with polypropylene as a matrix resin. .

  Further, in the present embodiment, the rib 60 is formed by integrally molding with the back pan 32. However, the rib 60 may be formed as a separate part from the back pan 32 and attached in a later process. In addition, when the back pan 32 is manufactured by fiber reinforced plastic using continuous fibers such as carbon or glass as a reinforcing material, the rib 60 portion may not include the reinforcing material but may have a structure made of only ordinary resin. . That is, when the back pan 32 is molded, the continuous fiber may be molded without setting the continuous fiber in the portion corresponding to the rib 60 of the mold.

  In the present embodiment, nine ribs 60 are provided. However, the number of ribs 60 is not limited to this, and may be one, two to eight, or ten or more.

  In the present embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

10 Vehicle Seat 20 Seat Cushion 30 Seat Back 32 Back Pan (Seat Shell)
32f Side standing wall (side)
32j Folding part 32s Rear support part 52 Bag body (side airbag)
60 Rib 61 Rear terminal part (terminal part)

Claims (2)

A seat shell as a structure having a rear surface supporting portion for supporting the rear surface of the seated person and a side portion rising from the rear surface supporting section to support the side surface of the seated person, and attached to the opposite side of the seating surface of the side portion A side airbag and a seat back or seat cushion,
A vehicle seat provided with a folded portion formed by folding the terminal of the side portion from the seating surface side toward the opposite surface side of the seating surface on the side portion,
On the opposite surface side of the seating surface of the side portion, a rib extending along the rising direction of the side portion is disposed at a position closer to the deployment direction of the side airbag than the side airbag.
When the side airbag is deployed, the end portion of the rib contacts the side airbag being deployed, and guides the deployment direction of the side airbag so that the side airbag is not caught by the folded portion. A vehicle seat characterized by: The vehicle seat according to claim 1,
The rib is disposed so as to connect a part of the folded portion and a wall portion facing the folded portion,
The vehicle seat characterized in that the end portion of the rib is inclined so as to protrude outward in the left-right direction of the seat shell as it moves away from the location where the side airbag is attached. .

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