JP2005001618A - Seat back structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat back structure capable of reducing the thickness of a seat back while avoiding interference of a head rest guide with an arm rest. <P>SOLUTION: A center head rest 9 is disposed above an arm rest 13. A head rest guide 10 to support the center head rest 9 is located more backward of a seat back 2 than the arm rest 13. The head rest guide 10 is disposed on the back side of the seat back 2 in an upper frame 6. A retractor 22 is offset in the width direction of the seat back 2 with respect to the arm rest 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat back structure in which an accommodation such as an armrest or a child seat is disposed on a seat back of an automobile.
[0002]
[Prior art]
As shown in FIG. 7, some automobile seats 50 have a seat back 51 provided with an armrest 53. The armrest 53 is pivotally attached to the seat back 51 so that the lower end portion of the armrest 53 is rotatable, and is stored in a storage recess 52 formed in the seat back 51 when not in use. When used, the stored armrest 53 is tilted on the seat cushion 54 in the direction of the arrow.
There is also a type in which a retractable child seat is provided in the center of the vehicle seat 50 instead of the armrest 53 (see Patent Document 1).
[0003]
In addition, when the car seat 50 of FIG. 7 is a three-seat type, a retractor (not shown) for storing a passenger seat belt seated on both the left and right sides is disposed on a side body such as a pillar portion and is seated in the center. A retractor (not shown) for storing an occupant seat belt is built in the seat back 51. This built-in retractor is attached to the back panel 58 of the seat back 51. In order to secure the cushioning property of the seat back 51, a certain thickness of the cushion material is required on the front side of the built-in retractor.
[0004]
As shown in FIG. 7, a headrest 55 is disposed at the upper end of the seat back 51. A headrest guide 56 is fixed to the upper frame 57 of the seat back 51, and the headrest 55 is attached to the headrest guide 56. That is, the headrest guide 56 is attached with its longitudinal direction up and down, and the headrest stay 59 of the headrest 55 is supported through the lower portion of the headrest guide 56.
Normally, the back panel 58 of the seat back 51 is disposed at the rear portion of the upper frame 57. In order to avoid interference between the headrest guide 56 and the back panel 58, the headrest guide 56 is attached to the front side of the upper frame 57. The lower end portion of the headrest stay 59 of the headrest 55 protrudes further below the position of the lower end portion of the headrest guide 56.
[0005]
[Patent Document 1]
JP-A-8-175245
[Problems to be solved by the invention]
As described above, when the armrest 53 is stored in the seat back 51, if the headrest 55 is disposed so as to overlap the position of the armrest 53 in the vehicle width direction, the headrest guide 56, the headrest stay 59, the armrest 53, or the storage There may be interference with the recess 52. In order to prevent such interference, when the armrest 53 or the like is disposed below the headrest 55, the storage recess 52 such as the armrest 53 or the like is disposed in front of the position of the headrest stay 59. However, when doing so, the thickness of the seat back 51 in the front-rear direction is increased.
On the other hand, it is conceivable to adopt a structure in which the headrest guide 56 and the headrest stay 59 are shortened so that they do not protrude downward. In this case, the height adjustment width of the headrest 55 is shortened. Or the length of the armrest 53 is shortened.
The present invention has been made in view of such a situation, and an object of the present invention is to provide a seat back structure capable of thinning the seat back while avoiding interference between the headrest guide and the armrest.
[0007]
[Means for Solving the Problems]
The present invention provides a reinforcing member extending in the width direction of the seat back in the seat back of the automobile seat, and forms a recess in the front surface of the seat back, and the stored item can be pulled out to the seat cushion side in the recess. In the seat back structure in which the headrest guide for supporting the headrest is provided on the reinforcing member, the headrest guide is attached to the rear side of the reinforcing member, and the recess is on the front side of the headrest guide and the reinforcing member. It was arranged at a lower position.
The automobile seat is a bench seat, and the seat back of the bench seat is divided so as to have a different split ratio in the vehicle width direction, and a seat with a large split ratio of the split seat is divided into a central seat and a side seat. The headrest guide is disposed in the central seat, the recess is located on the front side of the central seat headrest guide, and the armrest is disposed as the storage in the recess.
The reinforcing member is provided with a headrest guide for the side seat, and the side seat headrest guide is attached to the front side of the reinforcing member.
A back panel having a protrusion protruding rearward was provided on the rear side of the reinforcing member, and the central seat headrest guide was disposed on the front side of the protrusion.
A seat belt retractor is disposed inside the seat back, and the retractor is provided together with the central seat headrest guide on the front side of the protrusion.
The seat belt retractor is disposed between the central seat headrest guide and the side seat headrest guide.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a seat back structure according to the present invention will be described with reference to the drawings. FIG. 1 shows a three-seat split type automobile seat located in the second row of three rows in the longitudinal direction of the vehicle. This seat is equally divided into four to six and includes a larger left rear seat 1 and a smaller right rear seat 24. Hereinafter, the left rear seat 1 will be described.
As shown in FIG. 2, the seat frame 3 located in the seat back 2 of the left rear seat 1 includes a left frame 4, a right frame 5, an upper frame 6 as a reinforcing member, and a lower frame 7. In the figure, the left frame 4 and the right frame 5 extend in the height direction when the seat back 2 stands (state shown), and the upper frame 6 and the lower frame 7 extend in the width direction of the seat back 2. A back panel 8 is provided on the rear side of each frame 4-7.
[0009]
As shown in FIG. 3, the upper frame 6 has a quadrangular cross section, and the front side of the back panel 8 (the right side in the figure) extends in the width direction. As shown in FIG. 4, the upper frame 6 includes a headrest guide 10 (center seat headrest guide) that supports the center headrest 9 and a headrest guide 12 (side seat headrest guide) that supports the side headrest 11. It is fixed by welding. More specifically, the center-side headrest guide 10 is attached to the back side of the seatback 2 in the upper frame 6, that is, the rear side of the upper frame 6, and the headrest guide 12 of the side headrest 11 is attached to the seatback 2 in the upper frame 6. Is attached to the front side of the upper frame 6, that is, the front side of the upper frame 6. The center headrest 9 is for an occupant seated on the center side of the passenger compartment, and the side headrest 11 is for an occupant seated on the left side, which is the adjacent seat.
[0010]
As shown in FIG. 1, a seat 17 as a recess recessed from the front of the seat back 2 to the rear side is formed in the seat on the vehicle center side of the seat back 2. Here, an armrest 13 is provided. The storage portion 17 and the armrest 13 are disposed below or lower than the upper frame 6. In addition, the armrest 13 shown to the figure has shown the use condition inclined to the seat surface side 26a of the seat cushion 26. FIG.
As shown in FIG. 5, the headrest stay 18 of the center headrest 9 is provided with the storage portion 17 of the armrest 13 so as not to interfere with the storage portion 17 even if it is provided at a position overlapping the storage portion 17 of the armrest 13 in the vehicle width direction. It is offset in the front-rear direction. That is, the headrest stay 18 is disposed on the rear side of the storage unit 17.
A hinge bracket 15 is attached to the lower frame 7 of the seat frame 3, and the armrest 13 can be rotated in the front-rear direction around a hinge shaft 16 provided on the hinge bracket 15. For this reason, the armrest 13 can be taken in and out of the seat surface side 26 a of the seat cushion 26.
As shown in FIGS. 5 and 6, a back panel 8 is provided on the rear side of the seat frame 3. On the upper part of the back panel 8, a protrusion 23 is formed that protrudes to the rear side of the back panel. The back panel 8 of the seat back 2 is recessed below the height position of the lower end portion of the headrest stay 18 to the front side of the vehicle body to form a recess 14. The armrest 13 is positioned below the upper part of the back panel 8 of the seat back 2, that is, the upper frame 6 of the protrusion 23, and is disposed in the lower part of the back panel 8, that is, the recess 14. The headrest guide 10 is disposed on the upper portion of the seat back 2, that is, the protrusion 23.
[0011]
As shown in FIG. 2, a pair of reinforcing pipes 19 and 20 are disposed so as to extend in the same direction as the left frame 4 and the right frame 5 and connect the upper frame 6 and the lower frame 7. More specifically, these reinforcing pipes 19 and 20 are located between the headrest guide 10 and the headrest guide 12 and are provided on the outer side in the vehicle width direction of the position where the armrest 13 is disposed.
A retractor 22 for the seat belt 21 is disposed between the reinforcing pipes 19 and 20 via a bracket 28. More specifically, the retractor 22 is provided on the upper portion of the back panel 8. That is, the back panel 8 is disposed in a protrusion 23 that protrudes toward the rear side of the vehicle body. A tongue 27 is passed through the seat belt 21.
[0012]
The present embodiment has the following operation due to the configuration as described above. That is, as shown in FIGS. 5 and 6, the back panel 8 of the seat back 2 is formed with a recess 14 that is recessed toward the front side of the vehicle body at a lower portion than the height position of the lower end portion of the headrest stay 18. is doing. Thereby, the indoor space below the lower end portion of the headrest stay 18 of the seat back 2 is enlarged.
That is, if the seat back 2 is a middle seat or front seat in the second row, the leg space of the rear seat is widened, and when this seat back 2 is applied to the rear seat 1, a floor on which luggage such as a trunk is placed. There is an advantage of widening the lower space. Further, since the headrest stay 25 of the side headrest 11 is longer than the headrest stay 18 of the center headrest 9, it is disposed on the front side of the upper frame 6.
[0013]
Further, as shown in FIG. 3, the retractor 22 needs to have a width w with respect to the front surface of the seat back 2 for cushioning of the seat back 2. When the headrest guide 10 on the center side of the center headrest 9 is disposed in front of the upper frame 6, the headrest guide 10 is positioned at the headrest guide 12 of the side headrest 11 (the headrest guide 12 in FIG. 3). The headrest guide 10 (see the position of the headrest guide 12 in FIG. 3) and the armrest 13 interfere with each other. In the state of FIG. 3, when the armrest 13 is put into use and is taken out of the storage unit 17, the headrest guide 10 (see the position of the headrest guide 12 in FIG. 3) can be seen in the storage unit 17. Actually, the headrest guide 10 (refer to the position of the headrest guide 12 in FIG. 3) and the armrest 13 need to be separated from each other by a distance t. The armrest is offset to the position 13a indicated by the phantom line to reduce the thickness of the armrest 13 It is necessary to reduce the thickness or to increase the thickness of the seat back 2 by the distance t. Therefore, in the former case, the thickness of the armrest is small and the texture is inferior. In the latter case, the seat back 2 is thick and the indoor space is narrowed. Is disposed behind the upper frame 6, such a situation is solved.
Since the retractor 22 is disposed in the protrusion 23 that protrudes the back panel 8 toward the rear side of the vehicle body, the accommodation space in the seat back 2 can be effectively used.
[0014]
In the present embodiment, the portion of the back panel 8 located behind the headrest guide 12 of the side headrest 11 is protruded rearward. However, when a storage item such as an armrest is not assembled, this portion is shown in FIG. As indicated by reference numeral 14 a, it may be flush with the reference plane of the back panel 8 located in the recess 14. This further increases the space.
Moreover, although the case where the storage part 17 of the armrest 13 was provided in the seat back 2 was described in the present embodiment, the same effect can be achieved by providing a child seat in the storage part 17 instead of the armrest 13.
Although the headrest guide 12 of the side headrest 11 is disposed on the front side of the upper frame 6, the headrest guide 12 of the side headrest 11 may be provided on the rear side of the upper frame 6 as with the center headrest 9. However, the length of the headrest stay 25 of the side headrest 11 is made the same as that of the headrest stay 18 of the center headrest 9, or the concave portion 14 is arranged below.
[0015]
【The invention's effect】
In the present invention, the headrest guide is attached to the rear side of the reinforcing member, and the recess is disposed on the front side of the headrest guide and at a position lower than the reinforcing member. Thus, the thickness of the seat back can be made as thin as possible.
The automobile seat is a bench seat, and the seat back of the bench seat is divided so as to have a different split ratio in the vehicle width direction, and a seat with a large split ratio of the split seat is divided into a central seat and a side seat. The headrest guide is disposed in the central seat, the recess is located on the front side of the central seat headrest guide, and the armrest is disposed in the recess as the stored item. Interference between the armrest provided at the place and the headrest guide for the central seat can be prevented, and the sitting comfort can be improved by the armrest.
When the headrest guide for the side seat is provided on the reinforcing member, and the headrest guide for the side seat is attached to the front side of the reinforcing member, the storage and the headrest guide for the central seat that can be pulled out in the recess are provided. The thickness of the seat back with the headrest supported by the side seat can be substantially the same as the thickness of the seat back with the headrest supported by the side seat headrest guide. The vertical adjustment amount of the headrest supported by the headrest can be made larger than that of the headrest supported by the center seat headrest.
When a back panel having a protrusion protruding rearward is provided on the rear side of the reinforcing member, and the central seat headrest guide is disposed on the front side of the protrusion, the vehicle seat positioned behind the seat back Large space for passengers.
When a seat belt retractor is disposed inside the seat back and the retractor is provided together with the headrest guide for the central seat on the front side of the projection, the seat belt retractor avoids an increase in the thickness of the seat back. it can.
When the seat belt retractor is disposed between the headrest guide for the central seat and the headrest guide for the side seat, storage items such as an armrest and a child seat may be disposed below the headrest guide for the central seat. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view of an automobile seat to which a seat back structure according to an embodiment of the present invention is applied.
2 is a perspective view showing an external structure of the automobile seat in FIG. 1 by a two-dot chain line and showing an internal structure of a seat back and seat belt-related components.
FIG. 3 is a side view showing a state in which a retractor is incorporated, as viewed from an arrow III in FIG. 2;
4 is a plan view of the internal structure of the seat back as seen from the arrow IV in FIG. 2. FIG.
FIG. 5 is a cross-sectional view taken along line VV in FIG.
6 is a cross-sectional view taken along line VI-VI in FIG.
FIG. 7 is a longitudinal sectional view showing an internal structure of an automobile seat to which a conventional seat back structure is applied.
[Explanation of symbols]
1 Left rear seat 2 Seat back 3 Seat frame 4 Left frame 5 Right frame 6 Upper frame (reinforcing member)
7 Lower frame 8 Back panel 9 Center headrest 10 Headrest guide (Center seat headrest guide)
11 Side headrest 12 Headrest guide (headrest guide for side seats)
13 Armrest (storage part)
14 Concave portion 15 Hinge bracket 16 Hinge shaft 17 Storage portion (recess)
18 Headrest stays 19 and 20 Reinforcement pipe 21 Seat belt 22 Retractor 23 Projection 24 Right rear seat 25 Headrest stay 26 Seat cushion 26a Seat surface side 27 Tongue 28 Bracket t Distance w Width

Claims (6)

A reinforcing member extending in the width direction of the seat back is provided inside the seat back of the automobile seat, and a recess is formed in the front surface of the seat back, and a storage that can be pulled out to the seat cushion side is provided in the recess, In the seat back structure in which the reinforcement member is provided with a headrest guide that supports the headrest,
A seat back structure, wherein the headrest guide is attached to a rear side of the reinforcing member, and the recess is disposed at a position on the front side of the headrest guide and lower than the reinforcing member. The automobile seat is a bench seat, and the seat back of the bench seat is divided so as to have a different split ratio in the vehicle width direction, and a seat with a large split ratio is divided between a central seat and a side seat. The headrest guide is disposed in the central seat, the recess is located on the front side of the central seat headrest guide, and the armrest is disposed as the storage in the recess. The seat back structure according to claim 1. The seat back structure according to claim 2, wherein a headrest guide for the side seat is provided on the reinforcing member, and the headrest guide for the side seat is attached to a front side of the reinforcing member. The back panel which formed the protrusion which protrudes in a rear side was provided in the back side of the said reinforcement member, and the said headrest guide for center seats was arrange | positioned in the front side of the said protrusion. Seat back structure. 5. The seat back structure according to claim 4, wherein a retractor for a seat belt is disposed inside the seat back, and the retractor is provided together with the headrest guide for the central seat on the front side of the protrusion. 6. The seat back structure according to claim 5, wherein the seat belt retractor is disposed between the central seat headrest guide and the side seat headrest guide.

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