JP2014213738A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of stably supporting an upper body of an occupant.SOLUTION: A vehicle seat includes: a seat cushion; a seat back; a seat back frame F2 forming a frame of the seat back; a connection wire 70 which is stretched over the seat back frame F2; and a plate-like pressure receiving member 40 which is connected with the seat back frame F2 through the connection wire 70 and supports a load from an occupant. The pressure receiving member 40 includes: a pressure receiving part 41 facing an upper body rear part of the occupant; and support parts 42 which extend from both left and right end parts of the pressure receiving part 41 to the outer side in a crosswise direction and are formed so as to elastically deform in a fore-and-aft direction. A tip 42A of each support part 42 and the connection wire 70 are arranged so as not to overlap with each other when viewed from the front side.

Description

  The present invention relates to a vehicle seat including a seat cushion and a seat back.

  Conventionally, as disclosed in Patent Document 1 and the like, a vehicle seat having a plate-like pressure receiving member that is disposed between the left and right side frames of the seat back and supports the pad material of the seat back from the rear is known. It has been. In the vehicle seat of Patent Document 1, the pressure receiving members are connected to the side frames via connecting wires respectively erected on the upper and lower sides of the left and right side frames.

JP 2010-179754 A

  By the way, in the vehicle seat, it is required that the upper body of the occupant can be stably supported.

Then, an object of this invention is to provide the vehicle seat which can support the upper body of a passenger | crew stably.
Another object of the present invention is to suppress interference between members in the seat back.

  The present invention for achieving the above object is a vehicle seat including a seat cushion and a seat back, the seat back frame constituting the frame of the seat back, and the connection spanned over the seat back frame A plate-like pressure receiving member connected to the seat back frame via the connecting wire and supporting a load from the occupant, the pressure receiving member facing the upper back of the occupant; A support portion that extends outward in the left-right direction from the left and right end portions of the pressure receiving portion and is elastically deformable in the front-rear direction, and the tip of the support portion and the connecting wire are It is arranged so that it does not overlap.

  According to such a configuration, the occupant's upper body can be supported in a wide range by the central pressure receiving portion and the left and right support portions, and thus the occupant's upper body can be stably supported. In addition, since the tip of the support portion and the connecting wire are arranged so as not to overlap each other when viewed from the front, even if the tip moves back and forth due to deformation of the support portion, the tip of the support portion Interference with the connecting wire can be suppressed.

  In the vehicle seat described above, the connecting wire may be stretched up and down.

  According to this, compared with the configuration in which the connecting wire is bridged to the left and right, it is possible to realize an arrangement in which the tip of the support portion and the connecting wire do not overlap each other when viewed from the front. Thereby, interference with the front-end | tip of a support part and a connection wire can be suppressed.

  In the above vehicle seat, the connecting wire has a bent portion that is bent so as to protrude inward in the left-right direction, and the support portion is at least one in the range from the upper end to the lower end of the bent portion in the vertical direction. It can be set as the structure currently formed so that a part may be located.

  According to this, since at least a part of the portion located at the same height as the support portion of the connection wire is disposed so as to escape inward in the left-right direction from the front end of the support portion, the front end of the support portion and the connection wire Interference can be further suppressed.

  In the vehicle seat described above, the support portion may be formed in a range from the upper end to the lower end of the bent portion in the vertical direction.

  According to this, since the entire portion located at the same height as the support portion of the connection wire is disposed so as to escape inward in the left-right direction from the front end of the support portion, the interference between the front end of the support portion and the connection wire Can be further suppressed.

  In the vehicle seat described above, the connecting portion between the connecting wire and the pressure receiving member may be arranged in the pressure receiving portion.

  According to this, since a connection part will be arrange | positioned in the position far from the front-end | tip of a support part, interference with the front-end | tip of a support part and a connection wire can be suppressed more. In other words, since the connecting portion is not disposed in the vicinity of the support portion, it is possible to prevent the deformation of the support portion from being restricted by the connecting wire.

  In the vehicle seat described above, the seat back frame has left and right side frames that constitute the left and right frames of the seat back, and the support portion has a moving locus of a tip when deformed so that the left and right side frames of the side frame are left and right. It can be set as the structure currently formed so that it may pass inside a direction.

  According to this, even when the front end moves back and forth due to deformation of the support portion, interference between the front end of the support portion and the side frame can be suppressed.

  According to the present invention, since the upper body of the occupant can be supported in a wide range by the pressure receiving portion and the left and right support portions, the occupant's upper body can be stably supported. Moreover, since it arrange | positions so that the front-end | tip of a support part and a connection wire may not mutually overlap seeing from the front, interference with the front-end | tip of a support part and a connection wire can be suppressed.

  In addition, according to the present invention, by arranging the connecting wire up and down, it is possible to realize an arrangement in which the tip of the support portion and the connection wire do not overlap each other when viewed from the front, with a simple configuration, Interference can be suppressed.

  Further, according to the present invention, at least a part of the support portion is formed at the same height as the bent portion of the connection wire, so that interference between the tip of the support portion and the connection wire can be further suppressed.

  Moreover, according to this invention, interference with the front-end | tip of a support part and a connection wire can be suppressed further by forming a support part in the same height position as the bending part of a connection wire.

  Moreover, according to this invention, interference with the front-end | tip of a support part and a connection wire can be suppressed more by arrange | positioning the connection part of a connection wire and a pressure receiving member in a pressure receiving part. Moreover, it can suppress that a deformation | transformation of a support part is controlled by a connection wire.

  In addition, according to the present invention, it is possible to suppress the interference between the tip of the support portion and the side frame by forming the movement trajectory of the tip when the support portion is deformed so as to pass through the inner side in the left-right direction of the side frame. it can.

1 is a perspective view of a vehicle seat as an example of a vehicle seat according to an embodiment. It is a perspective view of a seat frame built in a vehicle seat. It is a front view of the seat back frame which comprises a seat frame. It is XX sectional drawing of FIG. It is a front view of the seat back frame concerning a modification.

Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, a vehicle seat according to an embodiment is configured as a vehicle seat S used for a driver's seat or a passenger seat of an automobile, and a seat cushion S1 on which an occupant sits, and a seat back S2. The headrest S3 that supports the head of the passenger is mainly provided. As will be described in detail later, the vehicle seat S can be used to prevent the other vehicle from colliding with the rear part of the own vehicle or the rear part of the own vehicle colliding with the other vehicle or structure. The upper body of the occupant is sunk into the seat back S2 when a backward movement load of a predetermined value or more is applied to the seat back S2 from the body.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad made of a cushion material such as urethane foam and a skin material made of synthetic leather or fabric, and the seat back S2 is placed on the seat back frame F2. The seat back pad 50 made of a cushion material and the skin material 60 are covered (see FIG. 1).

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20 constituting left and right frames of the seat back, and a lower frame 30. The upper frame 10, the left and right side frames 20, and The lower frame 30 is formed in a frame shape integrally joined by welding or the like.

The upper frame 10 is made of a pipe material bent into a substantially U shape, and a support bracket 12 for attaching the headrest S3 is fixed to the horizontal pipe portion 11 extending in the left-right direction by welding. A cross member 14 made of a metal plate is fixed to the left and right vertical pipe portions 13 extending in the vertical direction of the upper frame 10 by welding so as to be bridged between the left and right vertical pipe portions 13.
The left and right side frames 20 are formed in a substantially U shape in sectional view by pressing a metal plate or the like, and are arranged to face in the left-right direction.
The lower frame 30 is made of a metal plate and is disposed so as to be passed between the lower portions of the left and right side frames 20.

  As shown in FIG. 3, a pressure receiving member 40 that supports a load from an occupant via a connecting wire 70 spanned over the seat back frame F <b> 2 and a seat back pad 50 is disposed inside the seat back frame F <b> 2. Has been.

  The connecting wire 70 is a member for connecting the pressure receiving member 40 to the seat back frame F2. The connecting wire 70 is formed in a substantially U shape by bending, and a horizontal wire extending in the left-right direction so as to connect the left and right vertical wire portions 71 extending in the vertical direction and the lower ends of the left and right vertical wire portions 71 to each other. Part 72. Each of the left and right vertical wire portions 71 has a bent portion 73 that is bent so as to protrude toward the inner side in the left-right direction, more specifically toward the center in the left-right direction of the seat back frame F2.

  In the present embodiment, the cross member 14 and the lower frame 30 are each provided with a plurality of wire engaging portions 15 and 31 formed by cutting and bending a part thereof. In the connecting wire 70, the lower horizontal wire portion 72 is locked to the wire engaging portion 31 of the lower frame 30 at a plurality of locations, and the upper end portions of the left and right vertical wire portions 71 are respectively connected to the wire engaging portions 15 of the cross member 14. It is locked. As a result, the connecting wire 70 has the left and right vertical wire portions 71 spanned between the cross member 14 and the lower frame 30 in the vertical direction. The coupling wire 70 and the seat back frame F2 may be coupled by welding or the like.

  The pressure receiving member 40 is a plate-like member made of resin or the like, and is connected to the seat back frame F <b> 2 via a connecting wire 70 and is provided so as to be movable backward with respect to the left and right side frames 20. The pressure receiving member 40 mainly includes a pressure receiving portion 41 that faces the upper back of the occupant and left and right support portions 42 that extend outward in the left-right direction from the left and right ends of the pressure receiving portion 41.

  The pressure receiving portion 41 is integrally formed with an engaging claw 43 for fastening the pressure receiving member 40 to the connecting wire 70. The engagement claws 43 are formed in a total of six, three in a row in the vertical direction on the left and right sides of the pressure receiving portion 41, and each extends rearward from the rear surface of the pressure receiving portion 41, as shown in FIG. It is bent and extends along the rear surface of the pressure receiving portion 41, and further has a substantially U shape in sectional view that bends forward. When each engaging claw 43 engages with the connecting wire 70 (the bent portion 73 of the vertical wire portion 71), it holds the vertical wire portion 71 and holds the vertical wire portion 71 between the rear surface of the pressure receiving portion 41. To do. In this embodiment, since the engaging claw 43 is formed in the pressure receiving portion 41, in other words, the connecting portion between the connecting wire 70 and the pressure receiving member 40 is arranged in the pressure receiving portion 41 instead of the left and right support portions 42. ing.

  As shown in FIGS. 3 and 4, the support portion 42 is located behind the side portion of the part corresponding to the chest height of the upper body of the occupant mainly through the side portion 52 described later of the seat back pad 50. Support the part. The support portion 42 is formed integrally with the pressure receiving portion 41, and more specifically from the upper part of the left and right ends of the pressure receiving portion 41, more specifically from the portion corresponding to the height of the chest of the occupant of the pressure receiving portion 41. Extends diagonally forward. As shown in FIG. 3, the support portion 42 is formed in a range 73R from the upper end 73A to the lower end 73B of the bent portion 73 that bends away from the support portion 42 of the connecting wire 70 in the vertical direction. . Accordingly, at the same height position as the support portion 42, the connecting wire 70 (vertical wire portion 71) passes through the rear side of the pressure receiving portion 41 instead of the support portion 42. The connecting wires 70 are arranged so as not to overlap each other when viewed from the front.

  As shown in FIG. 4, the seat back pad 50 that covers the seat back frame F <b> 2 includes a central portion 51 that faces the pressure receiving portion 41, and left and right sides that are provided on both the left and right sides of the central portion 51 and project forward from the central portion 51. Side portion 52. In the present embodiment, the support portion 42 is disposed so as to face the side portion 52 of the seat back pad 50, so that the occupant can follow the elastic deformation of the side portion 52 when leaning against the seat back S2. It is formed so that it can be elastically bent and deformed back and forth with the vicinity of the connection portion with the portion 41 as a fulcrum. Further, the support portion 42 is formed such that the moving locus 42T of the tip 42A when deformed passes through the inner side in the left-right direction of the front portion of the side frame 20.

  The vehicle seat S described above is pushed by the occupant's upper body when a reverse movement load of a predetermined value or more acts on the seat back S2 from the occupant's upper body, for example, when another vehicle collides with the rear of the host vehicle. The vicinity of the center of the seat back pad 50 is greatly deformed, and a large backward movement load acts on the pressure receiving member 40 via the seat back pad 50. Then, the vertical wire portion 71 of the connecting wire 70 is mainly bent and deformed, so that the pressure receiving member 40 moves backward with respect to the left and right side frames 20. It will sink deeply into S2. As a result, the occupant's head quickly approaches the headrest S3 and is supported by the headrest S3, so that the occupant's head and neck can be protected from an impact caused by a rear collision of the vehicle.

Next, the effect of the vehicle seat S configured as described above will be described.
In the vehicle seat S, as shown in FIG. 3, the pressure receiving member 40 includes the pressure receiving portion 41 and the left and right support portions 42. The upper body can be supported in a wide range, whereby the upper body of the occupant can be stably supported. Further, since the tip 42A of the support portion 42 and the connecting wire 70 are arranged so as not to overlap each other when viewed from the front, as shown in FIG. 4, when the tip 42A moves back and forth due to the deformation of the support portion 42 Even so, interference between the tip 42A of the support portion 42 and the connecting wire 70 can be suppressed.

  In particular, in the present embodiment, as shown in FIG. 3, since the connection wire 70 is stretched up and down, the support portion 42 is compared with the configuration in which the connection wire is stretched from side to side as in the prior art. Arrangement in which the tip 42A and the connecting wire 70 do not overlap each other when viewed from the front can be realized with a simple configuration.

  Further, in the present embodiment, the support portion 42 is formed in the range 73R from the upper end 73A to the lower end 73B of the bent portion 73 in the vertical direction, so that it is at the same height as the support portion 42 of the connecting wire 70. Since the entire portion is disposed so as to escape inward in the left-right direction from the tip 42A, interference between the tip 42A and the connecting wire 70 can be further suppressed.

  Further, in the present embodiment, the connecting portion (engaging claw 43) between the connecting wire 70 and the pressure receiving member 40 is disposed in the pressure receiving portion 41, so that the engaging claw 43 is locked at a position far from the tip 42A. Accordingly, the interference between the tip 42A and the connection wire 70 can be further suppressed. In other words, since the connecting wire 70 is not disposed in the vicinity of the support portion 42, it is possible to suppress the deformation of the support portion 42 by the connecting wire 70.

  Further, in the present embodiment, the movement trajectory 42T of the tip 42A when the support portion 42 is deformed passes through the inner side in the left-right direction of the side frame 20, so even if the tip 42A moves back and forth, the tip 42A and the side Interference with the frame 20 can be suppressed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention as follows.

  In the embodiment, as shown in FIG. 3, the support portion 42 is formed so as to be entirely located in a range 73 </ b> R from the upper end 73 </ b> A to the lower end 73 </ b> B of the bent portion 73 of the connecting wire 70 in the vertical direction. However, the present invention is not limited to this. For example, as shown in FIG. 5, the support portion 42 may be formed so that a part thereof is positioned in a range 73 </ b> R from the upper end 73 </ b> A to the lower end 73 </ b> B of the bent portion 73 in the vertical direction. Also by this, a part of the portion of the connecting wire 70 that is at the same height as the support portion 42 is arranged so as to escape inward in the left-right direction from the tip 42A, so that interference between the tip 42A and the connecting wire 70 occurs. Can be suppressed.

  In the above embodiment, as shown in FIG. 3, the connecting portion (engaging claw 43) between the connecting wire 70 and the pressure receiving member 40 is arranged in the pressure receiving portion 41, but the present invention is not limited to this, For example, the engagement claw may be disposed on the support portion. Note that the connection between the connection wire and the pressure receiving member is not limited to the connection by the engaging claw. For example, the connection wire is connected by a binding band between a pair of through holes formed in the pressure receiving member and arranged vertically and horizontally. Such a configuration may be used.

  In the above-described embodiment, the connecting wire 70 (vertical wire portion 71) is bridged up and down between the cross member 14 and the lower frame 30, but the present invention is not limited to this. For example, referring to FIG. 3, the connecting wire may be bridged between the left and right side frames 20 from side to side. Further, the connecting wire may be bridged obliquely between one side frame 20 and the cross member 14 or the lower frame 30.

  In the embodiment, the support portion 42 is formed only at a position corresponding to the height of the occupant's chest, but the present invention is not limited to this. For example, the support portion corresponds to the height of the occupant's waist. It may be formed only at the position where the occupant is positioned, or may be formed at both the position corresponding to the height of the chest of the occupant and the position corresponding to the height of the waist. When the support part is formed at both the position corresponding to the height of the chest of the occupant and the position corresponding to the height of the waist, the support part corresponding to the height of the occupant's chest and the height of the waist The supporting part to be formed may be formed independently or may be formed in a state of being connected to each other.

  In the embodiment, as shown in FIG. 4, the support portion 42 is formed so that the movement locus 42 </ b> T of the distal end 42 </ b> A when deformed passes through the inner side in the left-right direction of the side frame 20. Although the interference with the frame 20 is suppressed, the present invention is not limited to this. For example, the support portion may be formed so that the tip abuts against the side frame when deformed by a predetermined amount. According to this, the excessive deformation | transformation of a support part can be suppressed.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, it uses with a rail vehicle, a ship, an aircraft, etc. It may be a sheet.

20 Side frame 40 Pressure receiving member 41 Pressure receiving portion 42 Support portion 42A Tip 43 Engaging claw 70 Connecting wire 73 Bending portion F2 Seat back frame S Vehicle seat S1 Seat cushion S2 Seat back

Claims (6)

A vehicle seat having a seat cushion and a seat back,
A seat back frame constituting a frame of the seat back;
A connecting wire spanned over the seat back frame;
A plate-shaped pressure receiving member connected to the seat back frame via the connecting wire and supporting a load from the occupant,
The pressure receiving member includes a pressure receiving portion that faces an upper back portion of an occupant, and a support portion that extends from the left and right ends of the pressure receiving portion to the outside in the left-right direction and is elastically deformable in the front-rear direction.
The vehicle seat, wherein the front end of the support portion and the connecting wire are arranged so as not to overlap each other when viewed from the front.   The vehicle seat according to claim 1, wherein the connecting wire is stretched up and down. The connecting wire has a bent portion bent so as to be convex inward in the left-right direction,
The vehicle seat according to claim 2, wherein the support portion is formed so that at least a part thereof is positioned in a range from an upper end to a lower end of the bent portion in the vertical direction.   The vehicle seat according to claim 3, wherein the support portion is formed in a range from an upper end to a lower end of the bent portion in the vertical direction.   The vehicle seat according to any one of claims 1 to 4, wherein a connecting portion between the connecting wire and the pressure receiving member is disposed in the pressure receiving portion. The seat back frame has left and right side frames constituting left and right frames of the seat back,
The vehicle according to any one of claims 1 to 5, wherein the support portion is formed so that a moving locus of a tip when deformed passes through an inner side in a left-right direction of the side frame. Sheet.

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