JPH10129416A - Seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase mounting strength of a central seat seat belt retractor, which is to be mounted on the a retractable seat bag on the rear left side seat of a vehicle. SOLUTION: This seat structure has a longitudinal frame 11 laid between an upper and a lower lateral frames 7, 8 of a seat bag frame 6. A retractor 15 is mounted on the left lower part, where the upper end of the longitudinal frame 11 and the upper lateral frame 7 cross each other, through the front and the rear brackets 19, 21 in the state of laying between the two frames 7, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat structure, and more particularly to a technical field related to a seat structure in which a retractor for winding a seat belt is provided on a seat back.

[0002]

2. Description of the Related Art Conventionally, as this kind of sheet structure,
For example, as shown in Japanese Utility Model Publication No. Hei 6-32455,
Attach and fix the retractor to the back plate of the seat back, lock the seat belt pulled out from this retractor to the through anchor in the seat back, change its direction, and pull it out from the belt outlet at the upper end of the front upper surface of the seat back. What has been known is known.

[0003]

However, in the above-mentioned prior art, since the retractor of the seat belt is mounted on the plate of the seat back, there is a problem that the mounting strength is low.

[0004] It is an object of the present invention to increase the mounting strength of the retractor by improving the mounting structure when the seat belt retractor is mounted on the seat back as described above.

[0005]

In order to achieve the above object, according to the present invention, a retractor is mounted on a frame-like frame provided in a seat back in a state of being stretched between two adjacent frames in an intersecting manner. I fixed it.

That is, the first aspect of the present invention is based on the premise that the seat structure has a seat belt retractor attached to the seat back. The seat back is provided with a frame-shaped frame, and the retractor is mounted so as to be stretched over both adjacent frames in the frame-shaped frame.

As described above, the seat belt retractor is
Since it is installed in a state that it is stretched over both adjacent frames in the frame frame of the seat back, the mounting strength of the retractor will be greatly increased compared to the conventional structure of mounting on the seat back plate. Therefore, the mounting strength can be improved.

In the invention according to claim 2, the retractor is a retractor for a rear center seat of the vehicle. Further, a vertical frame is provided on the left and right center sides of the seat back between the upper and lower horizontal frames of the seat, and a retractor is attached to the vertical frame. According to this seat structure, since the retractor is attached in a state of being bridged between the frame-shaped frame and the vertical frame,
The same effects as those of the first aspect can be obtained.

According to the third aspect of the present invention, the first or second aspect is provided.
In the above seat structure, a bracket is provided between both adjacent frames of the frame-shaped frame, and a retractor is attached to the bracket. In this case, since the retractor is attached and fixed to the frame-shaped frame via the bracket, the attachment to the frame can be easily performed.

[0010] In the invention according to claim 4, the bracket includes:
It consists of a plurality of brackets located before and after the retractor, and the retractor is surrounded by the plurality of brackets. This allows the retractor to be mounted with its surroundings covered by a plurality of brackets, so that the retractor can be well protected from external impact.

According to a fifth aspect of the present invention, the retractor in the seat structure of the fourth aspect is attached to a rear bracket located on a rear side from a front side, and the rear bracket is attached to a front bracket located on a front side of the retractor. The structure shall be attached from the side.

In this case, the front bracket is attached to the frame in advance, the retractor is attached to the rear bracket from the front side, and the rear bracket integrated with the retractor is attached to the front bracket from the rear side. Thus, the retractor can be attached to the frame-shaped frame via both brackets, and the attachability of the retractor can be improved. On the other hand, when the retractor is to be removed, on the other hand, the retractor can be removed from the frame by simply removing the rear bracket from the front bracket while the front bracket is still mounted. Therefore, the serviceability of the retractor can be improved.

According to a sixth aspect of the present invention, in the seat structure of the third aspect, the bracket is located at a front side of the retractor, and the retractor is attached to the bracket at only one end thereof. When the retractor is attached in this manner, the other end of the retractor is free and the bracket is cantilevered, and the retractor is attached to the bracket at the time of collision (one end).
Is displaced with the fulcrum as a fulcrum, thereby absorbing the moving energy of the retractor and reducing the impact value.

According to a seventh aspect of the present invention, in the bracket having the seat structure according to the sixth aspect, an opening is provided in a portion facing the main body of the retractor, and the retractor main body can be displaced in the opening. Configuration. With this configuration, the main body of the retractor is displaced into the opening of the bracket, and the displacement can be greatly tolerated, and the energy absorbing effect of the retractor can be more effectively obtained. Also, since the bracket has an opening,
Accordingly, the weight of the seat can be reduced.

According to an eighth aspect of the present invention, in the seat structure of the fifth aspect, the front bracket is disposed at a front portion of the frame, and the retractor is disposed inside the frame. By arranging the retractor in the frame as described above, the retractor is covered with the frame, and the retractor can be further protected. In addition, the retractor can be arranged in the space within the frame-shaped frame to improve the layout.

According to a ninth aspect of the present invention, in the seat structure of any one of the first to eighth aspects, the seat back is of a retractable type. Thus, the mounting strength of the seat belt retractor to the retractable seat back can be increased.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 2 shows a main part of a rear seat S of a vehicle according to Embodiment 1 of the present invention. The rear seat S is divided into a left seat 1 occupying approximately 60% of the entire width and a right seat 2 occupying approximately 40% of the entire width. , 2a are of a retractable type which can be tilted forward and independently of each other. The right seat 2 is a right seat, and the left side of the left seat 1 is a left seat. The right side of the left seat 1 is a center seat, and a recess 3 is formed in the front of the seat back 1a (a pad 14 described later) in this portion. When the center seat is not used, the armrest 4 is rotated forward to protrude from the seat back 1a, and when used, the armrest 4 is rotated backward to rotate the recess 3 of the seatback 1a. It is stored in.

The seat back 1 of the left and right seats 1 and 2
1a and 2a are basically the same, and as shown in FIG. 1, a pad 1 made of urethane resin or the like is provided on an iron frame 6.
4, the surface of which is covered with a skin cloth (not shown). The feature of the present invention lies in the seat back structure of the left seat 1.

That is, as shown in FIGS. 1 and 3 to 5, the frame-shaped frame 6 of the seat back 1 a of the left seat 1 is configured such that upper and lower sides of the seat back 1 a are parallel to each other in the left-right direction. It has upper and lower horizontal frames 7 and 8 formed of extending cylindrical pipes, and rectangular cylindrical left and right vertical frames 9 and 10 extending in the vertical direction on both left and right sides in the seat back 1a, respectively. The upper ends of the frames 9 and 10 are welded to both ends of the upper horizontal frame 7, and the lower ends of the left and right vertical frames 9 and 10 are welded to both ends of the lower horizontal frame 8, respectively. A recess 3 for storing the armrest 4 is provided on the right side of the seat back 1a.
Is arranged in the vicinity of the left of the vertical frame 9, 10 extending in parallel with the left and right vertical frames 9, 10. The upper end of the central vertical frame 11 is located in the middle of the upper horizontal frame 7.
The lower end is welded to an intermediate portion of the lower horizontal frame 8, and a central vertical frame 11 is provided between upper and lower horizontal frames 7, 8 at the left and right center of the seat back 1a.
Note that a panel-shaped plate frame 13 is integrally welded to the rear side surface of the frame-shaped frame 6.

In the frame 6, the lower left portion of the intersection between the upper end of the central vertical frame 11 and the upper horizontal frame 7 adjacent to each other, ie, the left and center vertical frames 9, 11 and the upper and lower horizontal frames. In the upper right corner of the frame portion surrounded by the frames 7, 8, a seat belt B for an occupant seated in the center seat is provided near the upper horizontal frame 7.
The retractor 15 for winding up the frames 7 and 11
It is attached and fixed in a state of being bridged across.

That is, the front and rear iron brackets 19 and 21 are provided between the upper and lower frames 7 and 11 at the lower left portion of the intersection between the upper end of the central vertical frame 11 and the upper horizontal frame 7. The retractor 15 is attached to the. The front bracket 19 is located on the front side of the retractor 15, and the rear bracket 21
Is also located on the rear side, and the front side bracket 1
9 is the upper end of the central vertical frame 11 and the upper horizontal frame 7
Is fixed by welding. As shown in FIGS. 6 to 8, the front bracket 19 has a substantially box-like shape recessed forward, and a pair of upper and lower bolt holes 20, 20,. Four nuts 2 corresponding to each bolt hole 20 are provided on the front surface.
Are welded. The front bracket 19 is disposed at the front of the frame 6 as shown in FIG.
The upper edge is on the upper side of the left side frame 7
Are welded to the lower surface on the front side.

On the other hand, the rear bracket 21 is shown in FIGS.
1, a pair of upper and lower bolt insertion holes 22, 22,... Are provided on the left and right sides of the front bracket 19, respectively.
0, 20,... Are formed. A bolt hole 21a is formed through the center of the rear bracket 21 and a nut 23 is welded and fixed to the rear surface of the rear bracket 21 corresponding to the bolt hole 21a.

Then, as shown in FIG.
A belt entrance 16 through which the seat belt B passes is provided at the rear upper end portion, and a bolt insertion hole 17 penetrating in the front-rear direction is formed at the lower rear portion, and the bolt insertion hole 17 of the retractor 15 is inserted through the bolt entrance hole 17. Mounting bolt 2 after
5 is screwed and fastened to the nut 23 through the bolt hole 21a of the rear bracket 21 so that the retractor 15 is retracted from the rear bracket 21 located on the rear side.
The belt entrance 16 is mounted from the front side with the belt entrance 16 disposed at the rear upper end. Further, mounting bolts 26 are inserted into the bolt insertion holes 22 of the rear bracket 21 to which the retractor 15 is mounted, respectively, and the nuts 2 are inserted through the corresponding bolt holes 20 of the front bracket 19.
4, the rear bracket 21 is attached to the front bracket 19 from the rear side. With this structure, the retractor 15 is housed so as to be surrounded by the brackets 19 and 21 on both the front and rear sides while being disposed inside the frame-shaped frame 6, and the belt entrance 16 of the retractor 15 is connected to the upper horizontal frame 7. The seat belt B is located at a position immediately below the rear end, and the seat belt B is pulled out from the belt entrance 16 at this position.

Further, on the upper surface of the upper horizontal frame 7, a belt guide mounting member 28 is provided just above the retractor 15.
Are fixed by welding. This belt guide attachment member 28 is for setting the height position of the seat belt B at the upper end of the seat back 1a.
As shown in the figure, it is formed in a substantially box shape depressed upward, and a ridge 28a extending in the left-right direction is formed on the upper surface thereof. A belt guide 29 made of resin is arranged on the upper surface of the belt guide mounting member 28. This belt guide 29 guides the seat belt B extending upward from the belt entrance 16 of the retractor 15 to the rear side of the upper horizontal frame 7 of the frame 6 in a sliding contact state so as to be pulled out to the front side of the seat back 1a. As shown in FIGS. 15 to 17, a substantially L-shaped cross section is provided so as to cover the upper surface of the belt guide attachment member 28 or the rear surface of the upper horizontal frame 7, and the ridge 28 a of the belt guide attachment member 28 is provided thereabove. A recess 30 to be fitted and locked is formed. Further, through-hole bolt holes 3 are provided on both left and right sides of the concave portion 30, respectively.
After the mounting bolts 32 are inserted into the respective bolt holes 31, the mounting bolts 32 are passed through the belt guide mounting member 28 and joined to the nuts 27 (see FIG. 3) joined to the lower surface thereof. By screwing and fastening, the belt guide 29 is attached and fixed to the upper portion of the upper horizontal frame 7 via the belt guide attachment member 28.

The rear end of the rear bracket 21 is located rearward of the plate frame 13, and an opening 13 a is formed at the upper end of the plate frame 13 to avoid interference with the rear bracket 21. Have been.

The opening 13a of the plate frame 13 is covered with a cover 34 made of resin. The cover 34 is bent so as to cover from the plate frame 13, which is the rear surface of the seat back 1a, to above the belt guide 29, and has a forwardly lowered step portion 34a at its front end.
The step 34a is formed on the belt guide 29.
A belt insertion portion 35 that allows the seat belt B to pass therethrough is opened, and a front edge of the belt insertion portion 35 is cut out so that the seat belt B can pass along the width direction. The front edge of the cover 34 is provided with screw holes 28b, 28b provided in the belt guide mounting member 28 (see FIG. 12).
The lower left and right side portions are fixed to the plate frame 13 by bolts.

Further, a notch 14a is formed in a portion of the pad 14 of the seat back 1a which is a path of the seat belt B extending from the retractor 15.

In FIGS. 1 and 2, reference numeral 37 denotes a headrest mounting portion for mounting a headrest 38, which is mounted on the upper horizontal frame 7 of the seat backs 1a, 2a.

Accordingly, in this embodiment, when the occupant seated in the center seat of the rear seat S of the vehicle uses the seat belt B, the seat belt B is pulled by the pulling operation of the retractor 15 by the pulling operation of the seat belt B. After being pulled out, the rear side of the upper horizontal frame 7 of the frame-shaped frame 6 is directed upward, and is pulled out to the front side of the seat back 1a while being slidably guided by the belt guide 29 above the upper horizontal frame 7. On the other hand, when the seat belt B is stored, the seat belt B is wound up by the retractor 15 in the reverse operation.

In this case, the retractor 1 of the seat belt B
5 is attached to the intersection of the adjacent upper horizontal frame 7 and the central vertical frame 11 in the frame-shaped frame 6 of the seat back 1a in a state of being bridged between the two frames 7, 11, so that the retractor can be used. The mounting strength of the retractor 15 is greatly increased as compared with the conventional structure of mounting on the seat back plate. Therefore, the mounting strength of the retractor 15 provided on the retractable seat back 1a can be improved.

At the intersection of the upper horizontal frame 7 and the central vertical frame 11, brackets 19, 21 are erected between the two frames 7, 11.
Since the retractor 15 is attached to the frame 1, the attachment of the retractor 15 to the frame 6 can be easily performed.

Further, since the retractor 15 is housed so as to be surrounded by the front and rear brackets 19 and 21 located before and after the retractor 15, even if a shock in the front-rear direction is applied to the retractor 15 from outside. The retractor 15 is well protected from the impact. For example, even if luggage or the like in the luggage compartment on the rear side of the rear seat S collides with the rear surface of the seat back 1a during braking of the vehicle, the retractor 15 can be protected from the impact.

The retractor 15 is connected to the rear bracket 2.
1, the rear bracket 21 integrated with the retractor 15 is attached to the front bracket 19 from the rear side. Therefore, when the retractor 15 is attached and fixed, the front bracket 19 is welded to the frame 6 in advance. After the retractor 15 is attached to the rear bracket 21 from the front side thereof with the mounting bolts 25, the rear bracket 21 integrated with the retractor 15 is attached to the front bracket 19 from the rear side using the mounting bolts 2.
, 26,..., And the mounting operation of the retractor 15 can be easily performed.

On the contrary, when the retractor 15 is to be detached, on the contrary, by simply removing the rear bracket 21 from the front bracket 19 while keeping the front bracket 19 attached and fixed, the retractor 15 is moved to the frame-like frame 6. Can be removed from. In addition, the rear end of the rear bracket 21 is connected to the opening 13 of the plate frame 13.
a and projecting to the rear side through
The opening 13a is covered with a cover 34 made of resin, and the notch 14a is formed in the pad 14 of the portion of the seat back 1a that becomes the path of the seat belt B extending from the retractor 15, so that When removing the retractor 15, there is no need to remove the pad as in the structure in which the retractor is embedded in the pad of the seat back. Just by removing the cover 34, the rear bracket 21 is exposed and fixed thereto. The retractor 15 can be removed, and the serviceability of the retractor 15 can be improved.

Further, since the front bracket 19 is arranged at the front of the frame 6 and the retractor 15 located at the rear side is arranged inside the frame 6, the retractor 15 is moved up and down. Since the left and right sides are covered with the frame-shaped frame 6, the retractor 15 can be well protected from the impact from up, down, left, and right directions. Moreover, since the retractor 15 is arranged in the space in the frame 6, the layout can be improved.

(Embodiment 2) FIGS. 18 to 23 show Embodiment 2 of the present invention (note that the same parts as in FIGS. 1 to 17 are denoted by the same reference numerals and detailed description thereof is omitted). This is a modified bracket structure.

That is, in this embodiment, only one mounting bracket 40 is provided between the upper horizontal frame 7 and the central vertical frame 11. The mounting bracket 40 includes a bracket body 41 and the bracket body 4.
1 and a retractor mounting portion 44 integrally fixed by welding. The bracket main body 41 is a substantially L-shaped one in which the box-shaped front bracket 19 in the first embodiment is cut out from the upper right corner to the vicinity of the lower left corner in a rectangular shape. It has a structure in which an opening 42 (notch portion) penetrating in the direction is formed, and a flange portion 41a rising rearward is formed on the outer edge thereof. One end (the upper end of the vertical portion) of the bracket body 41 is on the lower surface of the upper horizontal frame 7 in the frame-shaped frame 6, and the other end (the end of the horizontal portion) is on the left side of the central vertical frame 11. It is integrally welded and fixed.

On the other hand, the retractor mounting portion 44 has a substantially L-shaped cross section having a base portion 44a extending in a substantially horizontal direction and an upright portion 44b extending upright from the rear end edge of the base portion 44a (see FIG. 22). ), The upper surface of the base portion 44a is fixed by welding to the left and right centers of the lower end surface of the bracket body 41. On the other hand, the upright portion 44b is the bracket body 4
1 is extended upward so as to face the rear side in parallel with the rear side, and a bolt insertion hole 45 (corresponding to the bolt insertion hole 21a of the first embodiment) is formed through the upright portion 44b. The nut 23 is integrally welded concentrically with the hole 45.

The retractor 15 is provided with a seat belt B
Has a retractor body 15a that winds the inside thereof, and a bracket-shaped mounting portion 15b that extends downward from the rear surface,
A bolt insertion hole 17 penetrating in the front-rear direction is opened in the mounting portion 15b. As shown in FIG. 18 and the like, the mounting portion 15b of the retractor 15 is disposed behind the rising portion 44b of the retractor mounting portion 44. Each bolt insertion hole 1
7, 45 are aligned with each other, and these two bolt insertion holes 17, 4
The retractor 15 is mounted and fixed to the mounting bracket 40 by inserting a mounting bolt 25 through the rear side of the mounting bracket 5 from the rear side and screwing the distal end of the mounting bolt 25 to the nut 23 on the front surface of the upright portion 44b.

In the mounted state of the retractor 15, the bracket body 41 of the mounting bracket 40 is located in front of the retractor 15, and the retractor 15 is mounted and fixed to the mounting bracket 40 only at the lower end of the mounting portion 15b. The upper end is free. Further, the main body 15a of the retractor 15 faces the opening 42 of the bracket body 41 of the mounting bracket 40 in the front-rear direction.
It can be displaced forward inward. Other configurations are
This is the same as the first embodiment.

Accordingly, in the case of this embodiment, the retractor 15 is connected to the retractor mounting portion 44 of the mounting bracket 40.
The retractor 15 is attached by a cantilever support structure having only a lower end mounting portion 15b and its upper end side is free, so that at the time of collision, the retractor 15 uses the mounting position with the mounting bracket 40 (the mounting portion 15b) as a fulcrum and the front side. , And the displacement can absorb the moving energy of the retractor 15 and reduce the impact value from the retractor 15.

Further, the main body 1 of the retractor 15 on the rear side is attached to the bracket main body 41 of the mounting bracket 40.
5a, the opening 42 is formed in a portion facing the retractor main body 1 at the time of the collision.
5a can be largely displaced in the forward direction, and the energy absorbing effect of the retractor 15 can be more effectively obtained.

At this time, the seat belt B extends forward beyond the upper horizontal frame 7 in the frame 6 of the seat 1, and the tensile load applied to the seat belt B at the time of collision acts upward on the retractor 15. Therefore, even if the retractor 15 is cantilevered with respect to the mounting bracket 40, there is no problem in the structure that receives the load of the seat belt B.

In this embodiment, the retractor 15
Since the mounting bracket is a single mounting bracket 40, there is an advantage that the weight of the seat 1 can be reduced, the number of parts, the number of mounting portions, and the like can be reduced as compared with the first embodiment. In addition, the point that the opening 42 is provided in the mounting bracket 40 is also advantageous for weight reduction.

In each of the above-described embodiments, the center seat retractor 15 is attached to the left seat 1 of the rear seat S of the vehicle.
If the center seat is set on the left side of the right seat 2, the retractor 15 may be provided near the center of the right seat 2 (to the right of the center seat).

Further, in each of the above embodiments, the retractor 15 is attached to the retractable seat 1 in which the seat back 1a can be tilted forward, but a fixed seat back to which the seat back is fixed may be used. Alternatively, the present invention can be applied to a vehicle seat other than a rear seat and a seat other than a vehicle seat.

[0047]

As described above, according to the first aspect of the present invention, in the seat structure in which the seat belt retractor is attached to the seat back, the retractor extends between the two adjacent frames in the frame-shaped frame in the seat back. It was attached in a state of being bridged. According to the second aspect of the present invention, a vertical frame is provided between the horizontal frames above and below the rear seat of the vehicle at the center of the left and right sides of the seat back, and the retractor is attached to the vertical frame. According to these inventions, the mounting strength of the retractor can be improved as compared with the structure in which the seat belt retractor is mounted on the seat back plate.

According to the third aspect of the present invention, a bracket is provided between both adjacent frames of the frame-shaped frame, and the retractor is mounted on the bracket, thereby facilitating the mounting of the retractor to the frame-shaped frame. Can be achieved.

According to the fourth aspect of the present invention, the plurality of brackets located before and after the retractor are provided, and the plurality of brackets surround the retractor, so that the protection of the retractor can be improved. .

According to the fifth aspect of the present invention, the retractor is attached to the rear bracket from the front side, and the rear bracket is attached to the front bracket on the front side of the retractor from the rear side, so that the front bracket is attached to the frame frame. The retractor can be integrally attached to and detached from the front bracket with respect to the front bracket, and serviceability of the retractor can be improved.

According to the sixth aspect of the present invention, the bracket is provided at the front side of the retractor, and the retractor is attached to the bracket only at one end thereof, so that the retractor has a cantilever structure in which the other end is free. It is possible to reduce the impact value by supporting and absorbing the movement energy of the retractor at the time of collision.

According to the seventh aspect of the present invention, in the bracket according to the sixth aspect of the present invention, an opening is provided at a portion facing the retractor main body so that the retractor main body can be displaced inward. Displacement of the retractor can be greatly permitted by smoothly displacing it into the opening of the bracket, so that the energy absorbing effect of the retractor can be further improved and the weight of the seat can be reduced.

According to the eighth aspect of the present invention, the front bracket according to the fifth aspect of the present invention is disposed at the front of the frame-shaped frame, and the retractor is disposed inside the frame-shaped frame. It is possible to further improve the layout and the layout thereof.

According to the ninth aspect of the present invention, since the seat back is of a retractable type, the mounting strength of the seat belt retractor to the retractable seat back can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a seat structure according to a first embodiment of the present invention.

FIG. 2 is a front view showing a main portion of a left seat in a vehicle rear seat;

FIG. 3 is a side view showing a main part of a seat back of a left seat.

FIG. 4 is a rear view of the belt access portion of the seat back as viewed from the rear side.

FIG. 5 is a plan view of a belt access portion of the seat back as viewed from above.

FIG. 6 is an enlarged front view of a front bracket.

FIG. 7 is an enlarged side view of a front bracket.

FIG. 8 is an enlarged plan view of a front bracket.

FIG. 9 is an enlarged front view of a rear bracket.

FIG. 10 is an enlarged side view of a rear bracket.

FIG. 11 is an enlarged plan view of a rear bracket.

FIG. 12 is an enlarged plan view of a belt guide attachment member.

FIG. 13 is an enlarged side view of a belt guide attachment member.

FIG. 14 is an enlarged front view of a belt guide attachment member.

FIG. 15 is an enlarged plan view of a belt guide.

FIG. 16 is an enlarged side view of a belt guide.

FIG. 17 is an enlarged front view of a belt guide.

FIG. 18 is a view corresponding to FIG. 1 showing a seat structure according to a second embodiment of the present invention.

FIG. 19 is a diagram corresponding to FIG. 2, showing only a main part of the seat back in the second embodiment.

FIG. 20 is a view corresponding to FIG. 3, showing a main part of the seat back in the second embodiment.

FIG. 21 is a front view showing a frame structure and a bracket according to a second embodiment.

FIG. 22 is a side view showing a frame structure and a bracket according to the second embodiment.

FIG. 23 is a bottom view showing a frame structure and a bracket according to the second embodiment.

[Explanation of symbols]

 S Rear seat 1 Left seat 1a Seat back 6 Frame-shaped frame 7 Upper horizontal frame 11 Central vertical frame 15 Retractor 15a Retractor main body 15b Mounting portion 19 Front bracket 21 Rear bracket 29 Belt guide 34 Cover 40 Mounting bracket 41 Bracket main body 42 Opening 44 Retractor mounting part B Seat belt

Claims (9)

[Claims] 1. A seat structure in which a seat belt retractor is attached to a seat back, wherein the seat back has a frame-shaped frame, and the retractor is stretched between two adjacent frames in the frame-shaped frame. A seat structure characterized by being attached in a state. 2. The seat structure according to claim 1, wherein the retractor is a retractor for a rear center seat of a vehicle, and a vertical frame is provided between left and right horizontal frames of a seat at right and left center sides of a seat back. A seat structure to which a retractor is attached. 3. The seat structure according to claim 1, wherein a bracket is provided between both adjacent frames of the frame-shaped frame, and a retractor is attached to the bracket. 4. The seat structure according to claim 3, wherein the bracket includes a plurality of brackets positioned before and after the retractor, and the retractor is surrounded by the plurality of brackets. 5. The seat structure according to claim 4, wherein the retractor is attached to a rear bracket located on a rear side from a front side, and the rear bracket is attached to a front bracket located on a front side of the retractor from a rear side. A seat structure characterized in that: 6. The seat structure according to claim 3, wherein the bracket is located on a front side of the retractor, and the retractor is attached to the bracket at only one end thereof. 7. The seat structure according to claim 6, wherein the bracket has an opening in a portion facing the main body of the retractor, and the retractor main body is configured to be displaceable into the opening. And the seat structure. 8. The seat structure according to claim 5, wherein the front bracket is disposed at a front portion of the frame, and the retractor is disposed inside the frame. 9. The seat structure according to claim 1, wherein the seat back is foldable.