JP2012206541A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat that prevents a seat back frame from being deformed due to an impact of baggage from the rear without increasing cost and weight.SOLUTION: The vehicle seat is configured by supporting one side of a seat back frame 9 having a substantially hollow square shape in front view and composed of an upper frame 15, a lower frame 16 and left and right side frames 17, 18, by a seat cushion, a reclining device or a striker to the body of the vehicle. A substantially U-shaped detour part 15c is formed at substantially the center of the upper frame 15.

Description

  The present invention relates to a vehicle seat such as an automobile.

  As a conventional vehicle seat, for example, a seat back on the side close to the vehicle body is supported by a hinge mechanism so as to be able to rotate back and forth, and a side away from the vehicle body, that is, a seat back on the indoor side is locked by a reclining device or a striker. And the right and left width of the sheet arranged across both sides of the vehicle body is 6 in the ratio of the right and left width of the left seat to 4 (see, for example, Patent Document 1). .)

JP 2009-040352 A

  However, in such a conventional technique, in the case where the cargo space and so-called passenger space so-called one-box car are spatially continuous, the space behind the seat is used as the cargo space. Yes. For this reason, when acceleration is applied to a load loaded in the cargo space, such as when the vehicle suddenly brakes, the load bumps behind the seat back in the standing position of the seat placed closest to the cargo space and stops. I'm going to fall. At this time, the seat back that is long in the left-right direction and is locked by the reclining device does not move, but the seat back side of the hinge mechanism only has no locking mechanism, and may be deformed to the front side. is there. Increasing the strength of the seat back frame to prevent this deformation not only causes an increase in cost but also increases the weight. If reclining devices are installed on both sides of the seat back, it will not only cause an increase in cost but also increase the weight.

  The present invention has been made paying attention to such a conventional technology, and the seat back frame is deformed by a method in which the cost does not increase and the weight does not increase with respect to the impact of the luggage or the like from the rear side. It provides a reduced vehicle seat.

  According to the first aspect of the present invention, a seat back frame formed in an approximately square shape when viewed from the front by an upper frame, a lower frame, and left and right side frames is attached to a seat cushion or a vehicle body on one side by a reclining device or a striker. Is a vehicle seat, and is characterized in that a substantially U-shaped detour portion is formed at a substantially central left and right of the upper frame.

  A second aspect of the present invention is the vehicle seat according to the first aspect, wherein the detour portion of the upper frame and the side frame of the support portion are connected to each other.

  The invention according to claim 3 is the vehicle seat according to claim 1 or 2, wherein the upper frame and the lower frame on the side of the seat back that is not locked by the reclining device or the striker. And connected by a reinforcing member.

  According to the first aspect of the present invention, since a substantially U-shaped detour portion is formed at the center of the left and right of the upper frame, only the detour portion is deformed in response to an impact of a load or the like from the rear side. Therefore, the deformation on the support portion side is less than the detour portion and the detour portion moves to the front side while absorbing the shock during deformation, but is a deformation of the seat back on the side not supported from the detour portion, The distance is short and the amount of deformation of the unsupported seat back is reduced. Forming the detour portion in the upper frame does not increase the cost and does not increase the weight.

  According to the second aspect of the present invention, since the detour portion of the upper frame and the side frame of the support portion are connected, the strength of the seat back is remarkably increased.

  According to the invention of claim 3, since the upper frame and the lower frame on the side of the seat back that is not locked by the reclining device or the striker are connected by the reinforcing member, the reinforcing member causes the seat to Significant increase in strength of the back is not necessary.

BRIEF DESCRIPTION OF THE DRAWINGS Front explanatory drawing of the vehicle seat which concerns on one Example of this invention. The perspective view of the seat back frame of the vehicle seat of FIG. The front view which looked at the seat back frame of the vehicle seat of FIG. 2 from the back.

  The purpose of providing a vehicle seat with less deformation of the seat back frame in a way that does not increase the cost and does not increase the weight against the impact of luggage, etc. from the rear side. A seat back frame formed in a substantially square shape when viewed from the front by a side frame of the vehicle, a vehicle seat in which one side is supported by a reclining device or a striker on a seat cushion or a vehicle body, This is realized by forming a substantially U-shaped detour in the middle of the left and right.

  The best embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows that three persons can be seated side by side on seats 1 and 2 mounted on a one-box type automobile as a “vehicle”. In other words, the sheets 1 and 2 are referred to as six or four divisions by dividing a one-box type automobile into two in the left-right direction. The seats 1 and 2 are so-called third seats (third seat from the front) disposed on the rear side RR behind the driver seat (not shown).

  The seat 1 is separated from a vehicle body (not shown) of the seat cushion 7 and a seat cushion 7 having a lateral width that is long to the left and right, approximately 730 millimeters, so that two adult occupants can be seated in succession on the left and right. The reclining device 11 provided on the indoor side includes seat backs 3 and 4 that can be stopped and locked at an appropriate inclination angle. Reference numeral 5 denotes a side member for supporting a passenger (not shown) from the side. Reference numeral 9 denotes a seat back frame disposed inside the seat 1. Reference numeral 13 denotes a headrest that is arranged at the upper end of the seatbacks 3 and 4 and supported by the seatback frame 9.

  The seat 2 includes a seat cushion 8 having a left and right width of 490 mm so that one adult occupant can be seated, and a reclining device 12 provided on the indoor side of the seat cushion 8 away from a vehicle body (not shown). The seat back 6 stops at an appropriate inclination angle and can be locked. Reference numeral 10 denotes a seat back frame disposed inside the seat 2. Reference numeral 13 denotes a headrest that is disposed at the upper end of the seatback 6 and supported by the seatback frame 10.

  As shown in FIGS. 2 and 3, the seat back frame 9 is made of an iron upper frame 15 arranged in a substantially horizontal shape and formed in a pipe shape, and is arranged in a substantially horizontal shape and formed in a pipe shape. The steel lower frame 16 and the left and right side frames 17 and 18 are formed in a substantially square shape when viewed from the front. The side frames 17 and 18 are arranged in a substantially vertical shape and are formed in the shape of an iron pipe, and upper ends thereof are supported by welding at both ends of the upper frame 15. The lower ends of the side frames 17 and 18 are welded and supported at the upper ends of flat plate iron plate support portions 19 and 20 whose periphery is reinforced by flanges. The lower end portions of the support portions 19 and 20 are welded and supported at both end portions of the lower frame 16. The reclining device 11 is attached to one of the support portions 19, and a shaft portion (not shown) is rotatably inserted into and supported by the other support portion 20.

  A substantially U-shaped detour portion 15 c is formed at the center of the left and right of the upper frame 15. The detour portion 15c has a left-right width of about 60 millimeters and a depth of about two-thirds of the vertical height (about 265 millimeters), and has a substantially U shape when viewed from the front. Reference numerals 15a and 15b denote bent portions from the upper frame 15 to the bypass portion 15c, and reference numerals 15d and 15e are formed substantially vertically between the bent portions 15a and 15b and the bypass portion 15c. It is a straight part. The bypass portion 15c itself has a U-shape when viewed from the front.

  Reference numeral 21 is an iron plate reinforcing member that is welded and supported by connecting the upper frame 15 and the lower frame 16. Reference numeral 22 denotes a connecting portion that connects the bypass portion 15c of the upper frame 15 and the side frame on the support portion 19 side that supports the reclining device 11.

  Next, the operation of this embodiment will be described.

  Since a substantially U-shaped detour portion 15c is formed at the center of the left and right of the upper frame 15, when the seat backs 3 and 4 receive an impact such as luggage from the rear RR, only the detour portion 15c Although deformation is caused by twisting, the straight portions 15d and 15e are not deformed and the moment is reduced, so that the deformation on the support portion 19 side is less than the detour portion 15c, and the detour portion 15c absorbs an impact during deformation while the front side Although it moves to FR, it is a deformation | transformation of the seat back 3 * 4 of the side which is not supported from the said detour part 15c, distance is short, and the deformation | transformation amount of the unsupported side seat back 4 becomes small. Forming the detour portion 15c in the upper frame 15 does not increase the cost and does not increase the weight.

  Since the detour portion 15c of the upper frame 15 and the side frame 17 having the support portion 19 on the side supporting the reclining device 11 are connected, the strength of the seat backs 3 and 4 is remarkably increased.

  Since the upper frame 15 and the lower frame 16 of the seat back 4 on the side not locked by the reclining device 11 are connected by the reinforcing member 21, the strength of the seat back 4 is greatly increased by the reinforcing member 21. No enhancement is required.

  In the above embodiment, the vehicle seat 1 has been described as an example of the vehicle seat, but the seat is not limited to this and may be a seat mounted on an aircraft, a rail vehicle, a ship, or the like. In addition, the seat 1 has been described by taking the third seat disposed behind the driver's seat as an example, but the seat 1 is not limited to this and may be a rear seat. Furthermore, although the reclining device 11 is taken as an example as a means for supporting the seat backs 3 and 4 of the seat 1, it is not limited to this, and a striker may be used.

1, 2, "Seat" of automobile as "vehicle" 3, 4, 6 Seat back 7, 8 Seat cushion 9, 10 Seat back frame 11, 12 Reclining device 15 Upper frame 15c Detouring part 16 Lower frame 17, 18 Side frame 19, 20 Support part

Claims (3)

A vehicle seat in which an upper frame, a lower frame, and left and right side frames are supported on one side by a reclining device or a striker on a seat cushion or a vehicle body. There,
A vehicle seat characterized in that a substantially U-shaped detour portion is formed at a substantially right and left center of the upper frame. The vehicle seat according to claim 1,
A vehicle seat characterized in that a detour portion of the upper frame and a side frame of the support portion are connected. The vehicle seat according to claim 1 or 2, wherein
The vehicle seat according to claim 1, wherein the upper frame and the lower frame which are not locked by the reclining device or the striker of the seat back are connected by a reinforcing member.

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