Side bolsters and rear seats for vehicles

Abstract

This prevents damage to the reinforcement fabric when the side airbags deploy. [Solution] The side bolster 30 is positioned between the seat back 14 of the rear seat 10 of the vehicle and the side of the vehicle body and comprises a bolster pad 34 that covers the side airbag unit 40, a bolster trim 36 that covers the bolster pad 34 and has a sewn portion that tears open when the side airbag is deployed, with a reinforcing cloth sewn to the sewn portion, and a guide wire 38 that is covered by the bolster pad 34 and has reaction force receiving portions 38C, 38G, 38K that receive the reaction force of the deployment of the side airbag when the side airbag is deployed, and locking portions 38E, 38I that are positioned outside the deployment area of ​​the side airbag and the bolster trim 36 is locked using a hog ring 56.

Description

【Technical Field】 【0001】 The present invention relates to a rear seat for a vehicle, and particularly to a side bolster. 【Background Art】 【0002】 The following Patent Document 1 discloses a side airbag device housed in a side bolster disposed between a seat back of a rear seat of a vehicle and a side portion of the vehicle body. In the side bolster in which this side airbag device is housed, a trim cover is locked to a wire embedded in a pad using a locking tool such as a hog ring or a hook. This trim cover has a sewing part (so-called burst line) that splits when the side airbag is deployed, and a reinforcing cloth is sewn to the sewing part. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2021-66251 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the above prior art, since a locking tool such as a hog ring exists in the deployment area of the side airbag, there is a concern that the reinforcing cloth of the side airbag may come into contact with the locking tool and be damaged when the side airbag is deployed. 【0005】 An object of the present invention is to obtain a side bolster and a rear seat for a vehicle that can prevent the reinforcing cloth from being damaged when the side airbag is deployed. 【Means for Solving the Problems】 【0006】 The side bolster of the first embodiment is positioned between the seat back of the rear seat of the vehicle and the side of the vehicle body and comprises a bolster pad covering the side airbag unit, a bolster trim that covers the bolster pad and has a sewn portion that tears open when the side airbag is deployed, with a reinforcing fabric sewn to the sewn portion, and a guide wire that is covered by the bolster pad and has a reaction force receiving portion that receives the reaction force of the deployment of the side airbag when the side airbag is deployed, and a locking portion that is positioned outside the deployment area of ​​the side airbag and to which the bolster trim is locked using a locking device. 【0007】 In the first embodiment of the side bolster, the side airbag unit is covered by a bolster pad positioned between the seat back of the rear seat of the vehicle and the side of the vehicle body. The bolster trim, which is placed over this bolster pad, has a seam that tears open when the side airbag deploys, and a reinforcing fabric is sewn into this seam. The guide wire covered by the bolster pad has a reaction force receiving portion that receives the reaction force of the deployment of the side airbag when the side airbag deploys, and a locking portion to which the bolster trim is locked using a locking device. Since this locking portion is located outside the deployment area of ​​the side airbag, it is possible to prevent the reinforcing fabric from coming into contact with the locking device and being damaged when the side airbag deploys. 【0008】 In the second embodiment, the side bolster, in the first embodiment, has a plurality of reaction force receiving portions and a plurality of locking portions, wherein the plurality of reaction force receiving portions and the plurality of locking portions are arranged alternately in the height direction of the seat back. 【0009】 In the second embodiment of the side bolster, as configured as described above, the deployment reaction force of the side airbag can be well supported by the guide wire, and the bolster trim can be well locked to the guide wire. 【0010】 In the third embodiment, the side bolster, in the first or second embodiment, has a portion of the bolster pad positioned on the side opposite to the side airbag unit via the reaction force receiving portion. 【0011】 In the third embodiment of the side bolster, as described above, interference between the side airbag and a portion of the bolster pad during deployment can be prevented by the reaction force receiving portion of the guide wire. 【0012】 The rear seat for a vehicle according to the fourth embodiment comprises a seat cushion on which the occupant of the vehicle sits, a seat back that supports the back of the occupant, and a side bolster according to any one of the first to third embodiments, which is positioned between the seat back and the side of the vehicle body and houses the side airbag unit. 【0013】 In the rear seat of the fourth embodiment of the vehicle, the back of the occupant seated on the seat cushion is supported by the seat back. A side airbag unit is housed in a side bolster positioned between the seat back and the side of the vehicle body. Since this side bolster is of any one of the first to third embodiments, the aforementioned effects are obtained. [Effects of the Invention] 【0014】 As described above, the side bolster and rear seat for a vehicle according to the present invention can prevent damage to the reinforcing fabric when the side airbag is deployed. [Brief explanation of the drawing] 【0015】 [Figure 1] This is a perspective view showing a part of the rear seat for a vehicle according to an embodiment. [Figure 2] This is a side view showing a side bolster according to an embodiment. [Figure 3] This is a cross-sectional view showing the cross-section along the line F3-F3 in Figure 2. [Figure 4] This is a cross-sectional view showing the cross-section along the line F4-F4 in Figure 2. [Figure 5] It is a side view showing the side bolster according to the comparative example. [Figure 6] It is a cross-sectional view showing a cross-section along the line F6-F6 in FIG. 5. 【Mode for Carrying Out the Invention】 【0016】 Hereinafter, the vehicle rear seat 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In each figure, some reference numerals may be omitted for the sake of clarity of the drawing. Further, the arrows FR, LH, and UP appropriately shown in each figure indicate the front, left, and upper directions of the vehicle rear seat 10, respectively. Hereinafter, when simply using the front-rear, left-right, and up-down directions for explanation, it is assumed that the directions with respect to the vehicle rear seat 10 are indicated. 【0017】 As shown in FIG. 1, the vehicle rear seat 10 according to the present embodiment has a seat cushion 12 on which an occupant sits, a seat back 14 that supports the occupant's back, and a headrest 16 that supports the occupant's head. On the outside in the seat width direction (left-right direction) of the vehicle rear seat 10, a rear side door 20 and a C-pillar 22 that form a part of the vehicle body side portion 18 are arranged. A side bolster 30 is arranged between the vehicle body side portion 18 and the seat back 14. This side bolster 30 forms a part of the vehicle rear seat. 【0018】 The side bolsters 30 are provided on both the left and right sides of the vehicle rear seat 10, and the left and right side bolsters 30 have basically the same configuration except that they are formed symmetrically left and right. 【0019】 As shown in FIGS. 2 and 3, the side bolster 30 has a bolster frame 32, a bolster pad 34, a bolster trim 36, and a guide wire 38, and has an elongated shape with the longitudinal direction along the height direction of the seat back 14. A side airbag unit (side airbag module) 40 is housed in this side bolster 30. 【0020】 The bolster frame 32 is manufactured by press-forming, for example, a metal plate material, and has an elongated shape with the longitudinal direction along the height direction of the seat back 14. This bolster frame 32 is fixed to the vehicle body by means such as bolt fastening. A side airbag unit 40 is fixed to this bolster frame 32. 【0021】 The side airbag unit 40 has a side airbag 42 and an inflator 44. The side airbag 42 is formed in a bag shape by folding a single base fabric cut out from, for example, a nylon-based or polyester-based fabric material in half and sewing the outer peripheral edge. The inflator 44 is a so-called cylinder-type gas generator and is formed in a cylindrical shape. This inflator 44 is housed inside the side airbag 42 in a posture where its axis is along the height direction of the seat back 14. 【0022】 An ECU (control device), not shown, mounted on the vehicle is electrically connected to this inflator 44 via a harness 50 etc. shown in FIGS. 2 to 4. A side impact sensor, not shown, for detecting a side collision of the vehicle is electrically connected to this ECU. These ECU and side impact sensor together with the side airbag unit 40 constitute a side airbag device. 【0023】 The ECU is configured to operate (activate) the inflator 44 when detecting an unavoidable side collision of the vehicle based on a signal from the side impact sensor. When a pre-crash sensor for predicting (forecasting) a side collision is electrically connected to the ECU, the inflator 44 may be activated when the ECU predicts a side collision based on a signal from the pre-crash sensor. 【0024】 In this side airbag unit 40, the side airbag 42 is folded in a predetermined folding manner, such as a roll fold or accordion fold, and is modularized together with the inflator 44. The folded side airbag 42 and inflator 44 are then wrapped in a wrap material that can be easily torn, thereby forming a long, rectangular side airbag unit 40. The longitudinal direction of the side airbag unit 40 is aligned with the height direction of the seat back 14. 【0025】 The side airbag unit 40 is positioned forward relative to the bolster frame 32. The inflator 44 is provided with two stud bolts 46, one above and one below. These stud bolts 46 pass through the bolster frame 32 and are screwed into nuts 48. In this way, the side airbag unit 40 is fixed to the bolster frame 32. 【0026】 The bolster pad 34 is made of a foam material such as urethane foam and has a long, rectangular shape with its length in the height direction of the seat back 14. The bolster frame 32 and the side airbag unit 40 are covered by this bolster pad 34. The bolster trim 36 is formed into a roughly bag-like shape by sewing together multiple pieces of outer material such as cloth, leather, or synthetic leather. The bolster pad 34 is covered by this bolster trim 36. 【0027】 A burst line section BL, which is a sewn section, is provided on the front of the bolster trim 36. This burst line section BL extends in the height direction of the seat back 14. In this burst line section BL, the outer layers of the bolster trim 36 are sewn together with weak thread. The reinforcing fabric 52 provided on the side airbag unit 40 is sewn to this burst line section BL. 【0028】 The reinforcing fabric 52 has an inner reinforcing fabric 52A positioned on the inside in the seat width direction relative to the side airbag unit 40, and an outer reinforcing fabric 52B positioned on the outside in the seat width direction relative to the side airbag unit 40. The inner reinforcing fabric 52A and the outer reinforcing fabric 52B are each made of a fabric-like material that is less stretchable than the base fabric that constitutes the side airbag 42. 【0029】 One end of the inner reinforcing fabric 52A and the outer reinforcing fabric 52B are sewn together to the burst line section BL. The other ends of the inner reinforcing fabric 52A and the outer reinforcing fabric 52B are sandwiched between the side airbag unit 40 and the bolster frame 32 and are fixed to the bolster frame 32 using the stud bolts 46 and nuts 48 of the inflator 44. 【0030】 The guide wire 38 is manufactured, for example, by bending a metal wire. This guide wire 38 is positioned between the bolster pad 34 and the side airbag unit 40 and is covered by the bolster pad 34. The bolster pad 34 also has an insert wire (not shown) embedded in it, separate from the guide wire 38. The majority of the guide wire 38 is positioned on the outside in the seat width direction relative to the side airbag unit 40 and is bent in a roughly angular wave shape when viewed from the left or right direction. 【0031】 This guide wire 38 has an upper frame engagement portion 38A that extends in the longitudinal direction of the side bolster 30 (in the height direction of the seat back 14) behind the upper end of the bolster frame 32, a first front-rear extension portion 38B that extends forward from the upper end of the upper frame engagement portion 38A, a first reaction force receiving portion 38C that extends diagonally downward and forward from the front end of the first front-rear extension portion 38B, and the first reaction force receiving portion 38C A second front-rear extension portion 38D extends diagonally from the lower end toward the rear and downward, a first locking portion 38E extends diagonally from the rear end of the second front-rear extension portion 38D toward the downward and forward, a third front-rear extension portion 38F extends diagonally from the lower end of the first locking portion 38E toward the forward and upward, a second reaction force receiving portion 38G extends diagonally from the front end of the third front-rear extension portion 38F toward the downward and forward, and a rearward extension portion extends from the lower end of the second reaction force receiving portion 38G A fourth front and rear extension portion 38H extending diagonally to the side and downward, a second locking portion 38I extending diagonally downward and forward from the rear end of the fourth front and rear extension portion 38H, a fifth front and rear extension portion 38J extending diagonally forward and upward from the lower end of the second locking portion 38I, a third reaction force receiving portion 38K extending diagonally downward and forward from the front end of the fifth front and rear extension portion 38J, and a rear and downward from the lower end of the third reaction force receiving portion 38K It is composed of a fifth front and rear extension portion 38L that extends diagonally, an upper extension portion 38M that extends diagonally upward and backward from the rear end of the fifth front and rear extension portion 38L, a rear extension portion 38N that extends diagonally backward and downward from the upper end of the upper extension portion 38M, and a lower frame engaging portion 38O that extends diagonally downward and forward from the rear end of the rear extension portion 38N and is located behind the vertically intermediate portion of the bolster frame 32. 【0032】 In this guide wire 38, the first reaction force receiving portion 38C, the second reaction force receiving portion 38G, and the third reaction force receiving portion 38K (hereinafter referred to as "multiple reaction force receiving portions 38C, 38G, and 38K") and the first locking portion 38E and the second locking portion 38I (hereinafter referred to as "multiple locking portions 38E and 38I") are arranged alternately in the longitudinal direction of the side bolster 30 (the height direction of the seat back 14). 【0033】 The upper frame engagement portion 38A and the lower frame engagement portion 38O contact the bolster frame 32 from the rear and are welded to the bolster frame 32. Multiple reaction force receiving portions 38C, 38G, and 38K are positioned on the outside in the seat width direction relative to the front of the side airbag unit 40 and contact the outer reinforcing fabric 52B from the outside in the seat width direction (see Figure 3). A portion 34A of the bolster pad 34 is positioned on the opposite side of the side airbag unit 40 (outside in the seat width direction) via the multiple reaction force receiving portions 38C, 38G, and 38K. 【0034】 Multiple locking portions 38E and 38I are positioned outward in the seat width direction relative to the rear of the side airbag unit 40, and are spaced apart outward in the seat width direction relative to the outer reinforcing fabric 52B (see Figure 4). The ends of the bolster trim 36 are locked to each of the multiple locking portions 38E and 38I using hog rings 56. The hog rings 56 correspond to the "locking device" in this invention. 【0035】 In the rear seat 10 of the vehicle with the above configuration, when the inflator 44 of the side airbag unit 40 is activated, the gas generated from the inflator 44 is supplied to the inside of the side airbag 42. As a result, the side airbag 42 inflates and deploys forward, rupturing (opening) the burst line portion BL of the bolster trim 36, and interposes itself between the occupant seated in the rear seat 10 of the vehicle and the side of the vehicle body 18 (see the side airbag 42 shown by the dashed line in Figures 3 and 4). 【0036】 As described above, when the side airbag 42 inflates and deploys, it interferes with the multiple reaction force receiving portions 38C, 38G, and 38K of the guide wire 38, as shown in Figure 3. This restricts the deployment direction of the side airbag 42, and the multiple reaction force receiving portions 38C, 38G, and 38K are configured to receive the deployment reaction force of the side airbag 42. Furthermore, as shown in Figure 4, the multiple locking portions 38E and 38I of the guide wire 38 are located outside the deployment area of ​​the side airbag 42, so that the outer reinforcing fabric 52B does not come into contact with the multiple locking portions 38E and 38I or the hog ring 56 when the side airbag 42 deploys. 【0037】 Next, the operation and effects of this embodiment will be described. In the rear seat 10 for the vehicle with the above configuration, the back of the occupant seated on the seat cushion 12 is supported by the seat back 14. In the side bolster 30 positioned between the seat back 14 and the side of the vehicle body 18, the side airbag unit 40 is covered by a bolster pad 34. The bolster trim 36 that covers the bolster pad 34 has a burst line portion BL that tears open when the side airbag 42 deploys, and a reinforcing fabric 52 is sewn to the burst line portion BL. 【0038】 The guide wire 38, positioned between the bolster pad 34 and the side airbag unit 40, has a plurality of reaction force receiving portions 38C, 38G, and 38K that receive the reaction force of the deployment of the side airbag 42 when the side airbag 42 is deployed, and a plurality of locking portions 38E and 38I to which the bolster trim 36 is locked using the hog ring 56. When the side airbag 42 is deployed, the plurality of reaction force receiving portions 38C, 38G, and 38K can restrict the deployment direction of the side airbag 42 and support the reaction force of the deployment of the side airbag 42. Moreover, since the plurality of locking portions 38E and 38I are positioned outside the deployment area of ​​the side airbag 42, it is possible to prevent the outer reinforcing fabric 52B from coming into contact with the hog ring 56 and being damaged when the side airbag 42 is deployed. 【0039】 Furthermore, in this side bolster 30, a portion 34A of the bolster pad 34 is positioned on the opposite side from the side airbag unit 40 via multiple reaction force receiving portions 38C, 38G, and 38K. This prevents the portion 34A of the bolster pad 34 from interfering with the side airbag 42 when it deploys, thanks to the multiple reaction force receiving portions 38C, 38G, and 38K. As a result, it is possible to prevent the portion 34A of the bolster pad 34 from scattering when the side airbag 42 deploys, thus preventing the deployment of the side airbag 42 from being hindered by such scattering. 【0040】 The above effects will be further explained using comparative examples shown in Figures 5 and 6. In these comparative examples, the configuration of the guide wire 100 differs from that of this embodiment. This guide wire 100 has two upper and lower locking parts 100A and 100B that are located on the outside in the seat width direction relative to the front of the side airbag unit 40, and the bolster trim 36 is locked to these locking parts 100A and 100B using a hog ring 56. Since these locking parts 100A and 100B are located within the deployment area of ​​the side airbag 42, there is a concern that the outer reinforcing fabric 52B may come into contact with the hog ring 56 and be damaged when the side airbag 42 is deployed, but this can be prevented in this embodiment. 【0041】 Furthermore, the reaction force receiving portion 100B (see Figure 6) of the guide wire 100 is positioned behind a portion 34A of the bolster pad 34 and is not positioned between the portion 34A of the bolster pad 34 and the side airbag unit 40. Therefore, when the side airbag 42 deploys, there is a risk that it may interfere with a portion 34A of the bolster pad 34 and cause that portion 34A to scatter, but this can be prevented in this embodiment. 【0042】 Furthermore, in this embodiment, the guide wire 38 has a plurality of reaction force receiving portions 38C, 38G, 38K and a plurality of locking portions 38E, 38I, and the plurality of reaction force receiving portions 38C, 38G, 38K and the plurality of locking portions 38E, 38I are arranged alternately in the height direction of the seat back 14. With this configuration, the deployment reaction force of the side airbag 42 can be well supported by the guide wire 38, and the bolster trim 36 can be well locked to the guide wire 38. 【0043】 In the above embodiment, the present invention was described in the case where it is applied to a rear seat 10 for a vehicle, but the present invention can also be applied to seats for vehicles other than vehicles (for example, aircraft and ships). 【0044】 Furthermore, the present invention can be implemented with various modifications without departing from its spirit. Of course, the scope of the present invention is not limited to the embodiments described above. [Explanation of Symbols] 【0045】 10 Rear seats for vehicles 12 seat cushions 14 Seatback 18 Side of the vehicle body 30 Side Bolster 32 Bolster Frame 34 Bolster Pads Part of the 34A bolster pad 36 Bolster Trim 38 Guidewire 38C First reaction force receiving section (reaction force receiving section) 38E 1st locking part (locking part) 38G Second reaction force receiving section (reaction force receiving section) 38I 2nd locking part (locking part) 38K Third reaction force receiving section (reaction force receiving section) 40 Side airbag unit 42 Side airbags 52 Rikifu 56. Hog ring (locking device)

Claims

[Claim 1] A bolster pad is positioned between the rear seat back of the vehicle and the side of the vehicle body, covering the side airbag unit, A bolster trim is fitted over the bolster pad and has a seam that rips open when the side airbag deploys, with a reinforcing fabric sewn into the seam; A guide wire having a reaction force receiving portion that is covered by the bolster pad and receives the reaction force of the deployment of the side airbag when the side airbag is deployed, and a locking portion that is located outside the deployment area of ​​the side airbag and to which the bolster trim is locked using a locking device, Side bolster equipped with a side bolster. [Claim 2] The guide wire has a plurality of reaction force receiving portions and a plurality of locking portions, The side bolster according to claim 1, wherein the plurality of reaction force receiving portions and the plurality of locking portions are arranged alternately in the height direction of the seat back. [Claim 3] The side bolster according to claim 1 or claim 2, wherein a portion of the bolster pad is arranged on the side opposite to the side airbag unit via the reaction force receiving portion. [Claim 4] The seat cushion on which the vehicle's occupants sit, A seatback that supports the back of the aforementioned occupant, A side bolster according to claim 1 or claim 2, which is positioned between the seat back and the side of the vehicle body and houses the side airbag unit, A rear seat for a vehicle equipped with [a specific feature / feature].

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