JPH0444526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat back structure including a seat back frame and a pad for a vehicle seat such as an automobile.

(Prior Art) As a conventional seat back structure, the one described in, for example, Japanese Unexamined Utility Model Application Publication No. 56-98058 (title of invention, seat back structure for automobile seat device) is known.

In this conventional seat bag structure, as shown in FIG.
a seat back frame 02 that supports the load applied to the seat back frame 02; a pad 04 disposed in front of the seat back frame 02 and wound around the seat back frame 02 by a pad winding portion 03 on the upper edge; It was equipped with the following.

(Problems to be Solved by the Invention) However, in such a conventional seat back structure, the seat back frame does not allow movement of the pad winding portion in the winding direction (direction of arrow a shown in FIG. 10). Because no means had been developed to prevent this, the following problems arose.

When the human load on the pad changes due to vehicle vibration, acceleration, deceleration, etc., and the center part of the pad is pushed or returned, the winding part of the pad is pulled downward and the winding direction is reversed. The tension state of the pad winding part is loosened and the pad winding part moves in the direction after winding.

As described above, when the pad winding portion moves in the winding direction, the pad winding portion and the seat back frame rub against each other, which sometimes generates a harsh rubbing sound.

By the way, as a method to prevent the occurrence of such rubbing noise, there is a method to adhesively fix the pad winding part to the seat back frame to prevent the pad winding part from moving in the winding direction, or to prevent the pad winding part from moving in the winding direction There is a method of reducing the frictional force generated between the pad winding portion and the seat back frame when they rub against each other by inserting a lubricant between them and the back frame.

However, in the former method, when attaching the pad to the seat back frame in the seat assembly process, an adhesive process is added, which increases the work effort.

In addition, in the latter method, since the durability of the lubricant is low, the lubricity of the lubricant decreases extremely over a long period of time, causing the pad winding part and the seat back frame to rub against each other, resulting in chafing. This causes sound.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this purpose, the present invention has a seat back that reduces the load applied to the seat back. a supporting seat back frame; disposed in front of the seat back frame;
A seat back structure comprising: a pad wound around the seat back frame by a pad winding part on a peripheral edge; The pad movement prevention portion is formed in a protruding or uneven shape.

(Function) In the seat back structure of the present invention, since the seat back frame is formed with a pad movement prevention portion that prevents movement of the pad winding portion in the winding direction, the load applied to the pad changes and the pad winding portion When a tensile force is applied to move the pad in the winding direction, movement of the inner portion of the pad winding portion in contact with the seat back frame is prevented by a pad movement prevention portion formed on the seat back frame.

Therefore, it is possible to prevent friction between the pad winding portion and the seat back frame as much as possible.

Furthermore, when attaching the pad to the seat back frame, the pad winding portion may simply be wrapped around the seat back frame.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing this embodiment, the seat back structure of an automobile seat will be taken as an example.

First, the configuration of the first embodiment shown in FIGS. 1 to 4 will be described.

The seat back structure according to the first embodiment of the present invention is a structure adopted in a seat back 100 of an automobile seat A, and includes a seat back frame 10, a pad 20, a pad winding portion 30, and a pad movement prevention portion 40. The main components are (Figure 1).

The seat back frame 10 supports the load applied to the seat back 100, and as shown in FIG. It is formed in a square shape and is attached to the cushion frame 111 of the seat cushion 110 so as to be reclinable.

Further, the left side frame 12 of the seat back frame 10 is rotatably connected to the rear end of the cushion frame 111 with a pin via a connecting bracket 14, and the right side frame 13 is connected to the cushion frame 111 with a pin.
A spring attachment portion 17 is attached to the rear end of the frame 1 with a mounting bracket 15 via a reclining device (not shown), and both ends of three S-shaped springs 16 are attached to both frames 12 and 13. is formed.

Incidentally, the S-shaped spring 16 absorbs the load W from the seated person inputted on the seat surface 102 to the pad 2.
It is elastically supported through 0.

The pad 20 elastically supports the load of the seated person. The pad 20 is made of urethane foam and is placed in front of the seat back frame 10, and is covered with a skin 101 that covers the surface of the seat back 100. There is.

Furthermore, a pad winding portion 30 is formed in the upper half of the peripheral edge of the pad 20, as shown in FIG. This pad winding part 30 is for attaching the pad 20 to the seat back frame 10 in a wound state, and as shown in the figure,
It is formed from an upper winding part 31 wound around the upper frame 11, a left winding part 32 around the left frame 12, and a right winding part 33 around the right frame 13. .

The pad movement prevention section 40 is connected to the pad winding section 3.
As shown in FIGS. 1, 2, and 4, this pad movement prevention part 40 is provided with a pad movement prevention part 40 that extends over the entire length of the seat back frame 10 and has a part on the outer half circumferential surface thereof. It is formed to protrude in a jagged or uneven shape.

In addition, the jaggedness of this pad movement prevention part 40 is
It is formed when the pipe forming the seat back frame 10 is formed. In addition, the padded winding part 30
As shown in FIGS. 1 and 4, the winding direction is the b direction for the upper winding part 31, the c direction for the left winding part 32, and the c direction for the right winding part 33. is in the d direction.

By the way, 120 in the figure is a headrest attached to the upper part of the seat bag 100.

Next, the operation of the first embodiment will be explained.

The back of the seated person is supported by the seat surface 1 of the seat back 100 by the pad 20 and the S-shaped spring 16.
It is elastically supported by 02.

At that time, due to changes in the load input from the back of the person (arrow W) and the load (arrow W) due to vibration, acceleration, and deceleration of the vehicle, the pad 20 is It is pushed in the W direction and deforms, or tries to return to its original shape.

With this deformation of the pad 20, the pad winding portion 3
0 is pulled in the winding directions b, c, and d, or tries to return to its original state with its own elastic force. At this time, the pad winding section 30 attempts to move while rubbing against the seat back frame 10, but the pad winding section 30 does not touch the seat back frame 10.
The portion that comes into contact with the pad movement prevention portion 40 formed on the pad normally hardly moves due to the frictional force generated between the two, and even when the load is large, the amount of movement is small.

Therefore, the occurrence of abnormal noise caused by the pad winding portion 30 and the seat back frame 10 rubbing against each other is almost eliminated.

Furthermore, when attaching the pad 20 to the seat back frame 10 in the manufacturing and assembly work of the seat A, the pad 20 is placed over the seat back frame 10 in the same way as in the past, and the pad winding portion 30 is wound around the seat back frame 10. Since it is done by attaching it, there is no additional work process like gluing.

Next, second to sixth embodiments will be described.

In describing the second to sixth embodiments, the same components as those in the first embodiment are designated by the same reference numerals in the drawings and their explanations will be omitted. Also, explanations of the functions that are similar to those of the first embodiment will be omitted.

First, a second embodiment shown in FIG. 5 will be described.

In this second embodiment, the seat back frame 21
0 is formed by an upper frame 211 having a U-shaped cross section, a left frame 212, and a right frame 213,
Further, the pad movement prevention section 240 makes a U-shaped cut in the outer peripheral surface of each frame 211, 212, 213, and pushes the cut portion outward to protrude (make it convex) from the general portion. This is an example in which a locking claw 241 is formed.

Note that the locking claw 241 projects toward the front and rear of the seat, respectively, as shown in the figure. Furthermore, the pad movement prevention portions 240 of the left frame 212 and the right frame 213 are formed in the upper halves.

Therefore, movement of the pad winding portion (not shown) is prevented by being locked by the locking claw 241 of the pad movement prevention portion 240.

Next, a third embodiment shown in FIG. 6 will be described.

In this third embodiment, two parallel cuts are made in the seat back frame 310, which is formed into a rectangular shape similar to the second embodiment, and the cut portions are punched out to the outside so as to form a letter shape in cross section. This is an example in which the pad movement prevention portion 340 is formed to protrude (convex) from the general portion.

Incidentally, the seat back frame 310 is provided with an inner plate 311 for forming the frame into a box-like cross-sectional shape.

Therefore, due to the frictional force generated between the pad movement prevention section 340, the pad winding section (not shown)
movement is prevented. In addition, the pad movement prevention part 3
40, the inner plate 311 increases the rigidity of the seat back frame 310.

Next, a fourth embodiment shown in FIG. 7 will be described.

In this fourth embodiment, a seat back frame 410 similar to the third embodiment has a punched-out hole 44 that is punched outward and protrudes (convexly) from the general portion.
This is an example in which the pad movement prevention portion 440 is formed using the pad movement prevention portion 440.

In addition, 411 in the figure is an inner plate.

A fifth embodiment shown in FIG. 8 will be described.

In this fifth embodiment, a seatback frame 510 similar to the third embodiment is provided with welded protruding members (convex) 541, 541 having an L-shaped cross section to protrude from the general part, and a separate member to prevent pad movement. This is an example in which a portion 540 is formed.

Note that 511 shown in the figure is an inner plate.

A sixth embodiment shown in FIG. 9 will be described.

In this sixth embodiment, protruding members 641, 6 having a convex cross section are welded to a seat back frame 610 made of pipes as in the first embodiment.
41 is made to protrude from the general part, and the pad movement prevention part 640 is formed with a separate member.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, the shape of the pad movement preventing portion is not limited to that shown in the embodiments, but any shape may be used as long as it can prevent movement of the pad winding portion in the winding direction. Further, the pad movement prevention portion shown in the second to fifth embodiments may be formed in a cylindrical seat back frame like the first embodiment.

(Effects of the Invention) As described above, in the seat back structure of the present invention, a convex or uneven pad movement preventing portion is formed on the seat back frame to prevent movement of the pad winding portion in the winding direction. By using this as a means, it is possible to prevent friction between the pad winding part and the seat back frame as much as possible, and it is possible to obtain the effect that it is possible to prevent the occurrence of rubbing noise caused by both. Furthermore, since the pad movement prevention portion is formed on the seat back frame, there is an advantage that no effort is required for retrofitting.

In addition to the above-mentioned effects, in the first to fourth embodiments, the pad movement prevention part is formed during molding or is simply provided with claws or holes, so no additional material is required. Since no expensive adhesives are used, the cost is very low.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the seat back structure of the first embodiment of the present invention, FIG. 2 is a perspective view showing the structure of the first embodiment, FIG. 3 is a perspective view showing the pad of the structure of the first embodiment, and FIG. 4 is a cross-sectional view taken along the - line in FIG. 2, FIG. 5 is a perspective view showing the main parts of the seat back structure according to the second embodiment of the present invention, and FIG. 6 is a main part of the seat back structure according to the third embodiment of the present invention. Perspective view showing part, No. 7
The figure is a perspective view showing the main part of the seat back structure according to the fourth embodiment of the invention, FIG. 8 is a perspective view showing the main part of the structure according to the fifth embodiment of the invention, and FIG. FIG. 10 is a perspective view showing the main parts, and FIG. 10 is a longitudinal sectional view showing the main parts of a conventional seat bag structure. 10,210,310,410... Seat back frame, 20... Pad, 30... Pad winding part, 40,240,340,440... Pad movement prevention part, 100... Seat back.

Claims (1)

[Scope of Claims] 1. A seat back is provided with a seat back frame that supports a load applied to the seat back, and a seat back frame that is disposed in front of the seat back frame and is wound around the seat back frame by a pad winding portion at a peripheral portion. In the seat bag structure, the seat bag frame is provided with a pad movement prevention portion protruding in a convex or uneven shape to prevent movement of the pad winding portion in the winding direction. Seat back structure featuring