Vehicle seat

Abstract

To suppress damage of a side air bag when mounting a back board in assembling a vehicle seat.SOLUTION: The side airbag 28 is accommodated in a side edge portion of the seat back 14. A push-in projecting part 34 projecting forward from a surface 20a part is arranged in the surface 20a part on the inside of a back board 20 for determining a back surface of a seat back 14. The push-in projection 34 pushes the rear surface of the folded base fabric 32 of the side airbag 28 to space the base fabric 32 from the side cover 21 of the backboard 20. In the attachment of the backboard 20, abrasion of the base fabric 32 by the side cover 21 is suppressed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a structure thereof. [Background technology]

[0002] A vehicle seat having a side airbag housed in a side edge portion of the seatback is known. Patent Document 1 listed below shows a vehicle seat (10) having an airbag device (20) housed in a side edge portion of the seatback (14). The airbag device (20) is disposed in the space between a back pad (32) that forms the surface of the seatback (14) facing the occupant and a backboard (34) that forms the back surface of the seatback (14). Note that the reference numerals in parentheses above are the reference numerals used in Patent Document 1 listed below and are not related to the reference numerals used in the description of the embodiments of the present application. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-192803 Summary of the Invention [Problem to be solved by the invention]

[0004] When assembling a vehicle seat, if a backboard is attached after an airbag has been installed on a seat frame, the backboard may rub against the airbag, particularly its base fabric, potentially damaging the base fabric. In particular, if an attempt is made to make the seat back thinner, the distance between the airbag and the backboard will decrease, increasing the possibility of damaging the base fabric.

[0005] The present invention aims to prevent damage to an airbag when a backboard is attached to a vehicle seat. [Means for solving the problem]

[0006] The vehicle seat of the present invention includes a seat back, a side airbag housed within a side edge portion of the seat back, and a backboard that defines the back surface of the seat back and has a protrusion that protrudes from the inner surface of the backboard and presses against the rear surface of the side airbag to create a distance between the side airbag and the backboard. [Effects of the Invention]

[0007] The protrusions on the backboard ensure a distance between the side airbag and the backboard of the seatback, thereby preventing damage to the side airbag when the backboard is attached. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a rear perspective view showing the vehicle seat. [Figure 2] FIG. 2 is a diagram schematically illustrating a side view of the vehicle seat. [Figure 3] 10 is a view showing a cross section of a side edge portion of a seat back, particularly a side support. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows a vehicle seat 10 as viewed obliquely from the rear. In the following description, terms indicating relative positional relationships and orientations, such as front, back, left, right, top, and bottom, refer to the positional relationships and orientations of a passenger seated in the vehicle seat 10, unless otherwise specified. In the drawings, the forward direction is indicated by an arrow FR, the upward direction by an arrow UP, and the leftward direction by an arrow LH. In addition, in the left-right direction of the vehicle seat 10, the side closer to the center of the seat is referred to as the widthwise inner side, and the side further away from the center is referred to as the widthwise outer side. In the drawings, the widthwise outer side is indicated by an arrow OUT.

[0010] The vehicle seat 10 includes a seat cushion 12 that supports the buttocks and thighs of the seated occupant from below, a seat back 14 that supports the upper body from behind, and a headrest 16 that is positioned behind the head. The seat back 14 includes side supports 18 that are provided on its side edges and support the seated occupant from the sides. The rear surface of the seat back 14 is defined by a backboard 20 made of resin. The backboard 20 extends forward at the left and right side edges, wrapping around from the rear to the sides, and covers part of the outer widthwise sides of the seat back 14. The parts of the backboard 20 that cover the outer widthwise sides of the seat back 14 are referred to as side cover parts 21.

[0011] FIG. 2 is a schematic diagram showing the side of the vehicle seat 10, and FIG. 3 is a cross-section taken along line AA in FIG. 2, particularly a cross-section of the side support 18 portion of the seat back 14. The seat back 14 includes a back frame 22 that forms the framework of the seat back 14, a back pad 24 that is a cushioning material disposed on the front surface of the back frame 22, and a back board 20 that is disposed so as to cover the rear surface of the back pad 24 and the back frame 22 from behind. The front and side surfaces of the back pad 24 are covered by a back pad cover 26. The back pad cover 26 may be made of fabric. The back board 20 extends forward so as to cover the outer sides of the side supports 18 in the width direction. The back pad 24 is made of urethane foam, and the back board 20 is made of resin.

[0012] A side airbag 28 is housed in the side edge of the seatback 14. The side airbag 28 may be arranged only on the side edge of the seatback 14 closer to the door, or on both the left and right side edges. The side airbag 28 includes an inflator 30 that generates gas in the event of a vehicle collision, and a bag-shaped base fabric 32 that is inflated by the generated gas. The base fabric 32 is housed in the seatback 14 in a folded state, and when inflated, it bulges out from the seatback 14 and deploys to the side of the seated occupant.

[0013] When assembling the seat back 14, the side airbag 28 is attached to the back frame 22 to which the back pad 24 is attached, and then the backboard 20 is attached. When attaching the backboard 20, if the backboard 20, particularly its side cover portion 21, rubs against the base fabric 32, the base fabric 32 may be damaged. Therefore, the backboard 20 is provided with a pushing protrusion 34 that pushes in the side airbag 28, particularly the folded base fabric 32. The pushing protrusion 34 is provided so as to protrude forward from the surface 20a of the backboard 20 facing the interior of the vehicle seat 10. The pushing protrusion 34 may also be provided so as to push in a portion of the rear surface of the base fabric 32 in the up-down direction. For example, as shown in FIG. 2 , the pushing protrusion 34 may be provided on a portion of the base fabric 32 that is housed in the side support 18. The pushing protrusion 34 may be formed integrally with the backboard 20.

[0014] The front end surface of the pushing protrusion 34 pushes against the rear surface of the base cloth 32, increasing the distance between the base cloth 32 and the surface 21a of the side cover portion 21 facing the interior of the vehicle seat 10. This prevents the surface 21a of the side cover portion 21 facing the interior of the seat from rubbing against the base cloth 32 when the backboard 20 is attached. The folded base cloth 32 deforms, so if the pushing protrusion 34 were not provided, it may be positioned closer to the backboard 20, as shown by the dashed line (reference symbol 32B) in FIG. 3 . Taking this into consideration, the side cover portion 21 of the backboard 20 needs to be positioned outward in the width direction, as shown by the dashed line (reference symbol 21B), so as not to come into contact with the base cloth 32. By providing the pushing protrusion 34, the distance between the base cloth 32 and the side cover portion 21 is reduced, allowing the side cover portion 21 to be positioned further inward in the width direction, thereby enabling the seat back 14 to be made thinner. [Explanation of symbols]

[0015] 10 Vehicle seat, 12 Seat cushion, 14 Seat back, 18 Side support, 20 Backboard, 21 Side cover portion 22 Back frame, 24 Back pad, 28 Side airbag, 32 Base fabric, 34 Push-in protrusion

Claims

[Claim 1] Seat back and a side airbag housed within a side edge portion of the seatback; a backboard that defines the back surface of the seat back, the backboard having a protrusion that protrudes from an inner surface of the backboard and presses the rear surface of the side airbag to increase the distance between the side airbag and the backboard; 1. A vehicle seat including:

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