JP2000106986A - Seat back structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the resonance of a back surface board to be attached to a seat back. SOLUTION: This seat back 3 of an automobile is constituted of an urethane seat back main body 4 and a back surface board 5 to be attached to its back surface. A recessed part 6 is formed on the back surface of the seat back main body 4 and pipes 7 and 8 attached to a seat back frame are arranged in the recessed part 6. An attachment bracket 9 for fixing the back surface board 5 is disposed in the lower part of the sheet back main body 4 and the screw hole of a screw 10 is formed in the attachment bracket 9. Projected parts 11 swelled in a waveform are integrally arranged in the recessed part 6 of the seat back main body 4. Then, the tip parts of the projected parts 11 are brought into contact with the surface of the back surface board 5 in a state where the back surface board 5 is attached to the seat back main body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back structure for preventing a back board mounted on the back side of an automobile seat back from vibrating.

[0002]

2. Description of the Related Art FIG. 5 is an exploded perspective view of a seat back body 4 and a back board 5 viewed from the back side of a seat back 3 provided on a front seat of an automobile, and FIG. Seat back 3 with back board 5 assembled
FIG. As shown in FIG. 6, a concave portion 6 is formed on the back surface of the seatback main body 4, and metal pipes 7 and 8 fixed to a seatback frame (not shown) are attached to the concave portion 6. A mounting bracket 9 for fixing the back board 5 is provided in the middle and lower portions of the seat back body 4, and the mounting bracket 9 is formed with a screw hole into which a screw 10 is screwed.

The back board 5 closes an opening formed by the recess 6 of the seat back body 4. The rear board 5 has a screw hole 13 at a position corresponding to the mounting bracket 9 of the seat back body 4. Back board 5
A pair of hooks 12 is provided at a position corresponding to the height of the upper pipe 7 attached to the seat back frame.
Is provided. When assembling the back board 5 to the seat back body 4, the upper pipe 7 of the seat back frame is used.
The rear board 5 is fixed by fixing the hook 12 to the lower pipe 8 and the rear board 5 with the cushioning material 15 interposed therebetween.

[0004]

The conventional seat back 3
In the structure (1), if the rear board 5 is not securely fixed, the rear board 5 may resonate due to vibration from the vehicle body and generate noise. For this reason, the number of places where the screws 10 are tightened is increased, or the cushion material 15 is interposed between the pipe 8 attached to the seat back frame and the back board 5. Therefore, there is a problem in that the mounting of the cushion material 15 as a separate component and an increase in the number of mounting locations by screws increase the number of mounting steps and increase the cost. The present invention has been made in view of the above problems, and an object of the present invention is to provide a seatback structure that prevents resonance of a rear board attached to a seatback and that does not require cost and man-hours for attachment.

[0005]

In order to achieve the above object effectively, a seat back structure according to the present invention comprises: a seat back body having a concave portion on a back surface; In a seat back structure including a back board that closes an opening, a convex portion is integrally provided from the bottom surface of the concave portion of the seat back body,
The tip of the projection was brought into contact with the back board. In the above invention, it is preferable that the cross-sectional shape of the convex portion is formed in a waveform.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat back structure according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a front seat 1 of an automobile, and the seat 1 includes a seat 2 and a seat back 3. 2 to 4
Indicates the seat back 3 among them. Seat back 3
Is composed of a urethane seat back body 4 and a back board 5 attached to the back surface thereof.

As shown in FIG. 3, a concave portion 6 is formed on the back surface of the seat back body 4, and metal pipes 7, 8 attached to the seat back frame are disposed in the concave portion 6. The pipes 7, 8 extend in the lateral direction of the seat 1, one of the pipes 7 is disposed above the seat back body 4, and the other pipe 8 is disposed in the middle. A mounting bracket 9 for fixing the back board 5 is provided below the seatback body 4, and the mounting bracket 9 is formed with a screw hole into which a screw 10 is screwed. The concave portion 6 of the seat back body 4 is a portion corresponding to a person's back, and a convex portion 11 whose cross section is raised in a wavy shape is integrally provided at the bottom of the concave portion 6. The corrugations of the protrusions 11 extend in the lateral direction of the seat back body 4. As shown in FIG. 4, when the back board 5 is attached to the seat back body 4, the tip of the projection 11 is brought into contact with the surface of the back board 5.

The back board 5 is disposed in an opening formed by the concave portion 6 of the seat back body 4 and closes the opening, and has a rectangular shape. A screw hole 13 is formed below the rear board 5 at a position corresponding to the mounting bracket 9 of the seat back body 4. A pair of hooks 12 are provided on the rear surface of the rear board 5 at positions corresponding to the height of the upper pipe 7 so as to face upward. When assembling the back board 5 to the seat back body 4, the hook 12 is engaged with the upper pipe 7 and the back board 5 is fixed with the screw 10. Therefore, the screws 10 are only used at two places to fix the rear board 5.

In this embodiment, since the front end of the convex portion 11 of the seat back body 4 hits the rear board 5 at two places, the vibration transmitted from the vehicle body side can be suppressed by the urethane convex portion 11. As a result, abnormal noise caused by resonance of the rear board 5 can be prevented. Conventionally, a cushion material has been used to prevent resonance of the rear board 5, but it can be eliminated. Conventionally, the fastening portion of the mounting screw of the rear board 5 is also used to prevent vibration.
Although there were many places, it can be reduced to two places at the bottom. Therefore, material costs can be saved and the number of assembly steps can be reduced. Conventionally, the cushion material could not be provided only between the lower pipe 8 and the back board 5, but in the present embodiment, the convex portion 11 is formed at an arbitrary position, and the rear boat 5
Can be contacted at any point. Furthermore, if the convex portion 11 is applied to the vicinity of the center of the back board 5 to which the weight of the occupant is applied, the back board 5 plays a role of receiving a load when a load is applied to the seat back body 4.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited thereto, and various modifications and changes can be made based on the technical concept of the present invention. For example, in the present embodiment, the convex portions 11 are brought into contact with a waveform, but the contact state may be point contact or line contact, and the shape and number of the convex portions 11 may be the shape and size of the seat back 3. It can be arbitrarily changed in consideration of the size and the like. However, the contact state between the convex portion 11 and the back board 5 is such that, if the convex portion 11 is protruded more than necessary or the area of the contact portion is increased, the repulsive force of the convex portion 11 becomes large, Since the assemblability may be deteriorated, it is desirable that vibration and abnormal noise be prevented. Further, it can be used not only for the front seat but also for the rear seat.

[0011]

As described above, according to the seat back structure of the present invention, a seat back body having a concave portion on the back surface, and a back board attached to the back surface of the seat back body and closing the opening of the concave portion. In the seat back structure including the above, the convex portion is provided integrally from the bottom surface of the concave portion of the seat back body, and the tip of the convex portion is brought into contact with the rear board, so that the rear board reduces the vibration of the vehicle body. Even if received, it does not resonate. Therefore, a cushioning material such as a cushioning material, which has been conventionally used, can be eliminated, and the number of mounting portions of the rear board can be reduced. As a result, cost can be reduced and the number of assembly steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat back employing a seat back structure according to an embodiment of the present invention as viewed from the rear.

FIG. 2 is a perspective view of a seat back body of the seat back of FIG.

FIG. 3 is an exploded perspective view of the seat back body of FIG.

FIG. 4 is a cross-sectional view of the seat back of FIG. 2 in the XX line direction.

FIG. 5 is an exploded perspective view of a conventional seat back body.

FIG. 6 is a cross-sectional view corresponding to FIG. 4 of a conventional seat back body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 3 Seat back 4 Seat back main body 5 Back board 6 Concave part 7,8 Pipe 10 Screw 11 Convex part 12 Hook

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaki Tanikawa 300 Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. F-term (reference) 3B087 DE03

Claims (2)

[Claims] 1. A seat back structure comprising: a seat back body having a recess on a back surface; and a back board attached to a back surface of the seat back body and closing an opening of the recess. A seat back structure wherein a convex portion is provided integrally from a bottom surface, and a tip of the convex portion is brought into contact with the back board. 2. The seat back structure according to claim 1, wherein a cross-sectional shape of the convex portion is formed in a waveform.