JPS6146122B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest support device provided on a backrest frame made of synthetic resin.

A conventional headrest support device installed on a metal backrest frame includes a U-shaped bracket welded to the frame, and a synthetic resin bracket held between both legs of the bracket and having an axial slit. A cylindrical body molded from a cylindrical body, and a spring member fitted into the cylindrical body, the leg part of the headrest being inserted through the cylindrical body being held at a desired position by the spring member. It had been. Therefore, since there are a large number of parts, it takes a lot of time to manufacture each part, and it also requires a lot of work to assemble it to the frame.

The present invention has been made under the above circumstances, and its object is to provide a headrest suitable for a synthetic resin frame, which has a small number of parts and requires only a small number of man-hours for processing and assembling the parts. The object of the present invention is to provide a support device.

Hereinafter, the present invention will be described with reference to illustrated embodiments. In FIG. 1, a backrest frame 1 includes a bottom 2 having a roughly rectangular shape, a wall 3 erected at the edge of the bottom 2, and a flange 4 provided at the tip of the wall 3. It is integrally molded by injection or compression from fiber-reinforced synthetic resin (FRP) in which reinforcing fibers such as glass fibers are embedded.

In addition, the headrest 5 has a main body 6 and a main body 6.
A pair of legs 7 (only one of which is shown in the figure) is provided with a base attached to the base.

The frame body 1 is provided on a wall portion 3a disposed on the upper side (on the right side in FIG. 1), and the headrest 5 is provided.
The leg portion 7 is provided with a through hole 8 into which the leg portion 7 is loosely inserted. Further, the frame body 1 is integrally provided with support portions 9 erected on the bottom portion 2 facing the upper wall portion 3a at intervals, and these support portions 9…… teeth,
The head rest 1 is located almost concentrically with the through hole 8.
A through hole 10 is formed into which the leg portion 7 is loosely inserted.

A spring member 11 is attached to the leg portion 7 of the headrest 1, located between the wall portion 3a and the support portion 9, for example. The spring member 11 is formed, for example, from a band-shaped spring material into a curve as shown in FIG. 2, and is formed so that the inner diameter d in the free state is sufficiently smaller than the outer diameter of the leg portion 7.
It should be noted that a stopper 12 for preventing the leg from coming off is attached to the free end of the leg 7 as required. Further, an appropriate cushion 13 is attached to the frame 1.

According to the above structure, the support part 9 is integrally molded at the same time as the frame body 1 is molded, and at that time, the through holes 8, 1
0 can be molded simultaneously. Therefore, since it is only necessary to form the spring member 11, the number of parts machining steps required to construct the headrest support device is extremely small. Further, since it is sufficient to simply insert the leg portions 7 into the through holes 8 and 10 and engage the spring member 11, welding or the like is not required at all, and the number of man-hours required for assembly is extremely small.
Therefore, the energy consumption required for component processing and assembly is also significantly reduced. In the assembled state, since the spring member 11 clamps the leg portion 7, the frictional resistance in the axial direction between the two is sufficiently large. Therefore, even if a downward force (to the left in FIG. 1) is applied to the headrest 1 due to its own weight or vibrations acting on it, the spring member 11
comes into contact with the support part 9 and is prevented from moving downward,
The headrest 5 is held in the set position. Also,
When changing the position of the head rest 5, it is sufficient to move the head rest by the required amount by pushing the main body 6 downward or upward by hand, etc., against the above-mentioned frictional force. It can be positioned steplessly.

Note that the spring member 11 may be formed from a rod-shaped spring material instead of being formed from a band-shaped spring material as described above, and in this case, it may be formed as shown in FIG. 2 or as shown in FIG. 1 as shown in
It may be formed by winding it more than once. If necessary, a plurality of spring members of the same or different shapes may be provided, and also between the wall portion 3a and the support portion 9, or instead of this, a plurality of spring members may be provided between the support portions. . Furthermore, in any of the above cases, recesses 7a, 7b, and 7c as illustrated in FIG. The headrest may be positioned depending on the case.

As described above, the backrest frame is formed by integrally molding the wall portion and the support portion having through holes into which the legs of the headrest are loosely inserted with the bottom portion, and the leg portions can be clamped. Since the head rest is positioned by a spring member disposed on at least one side of the support part, it is only necessary to form the spring member in addition to the frame body, and therefore the number of parts is small, making it easier to process parts. Since the number of man-hours is small and the assembly is simple and easy, the number of man-hours required for assembly is small, and energy consumption can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figures are an enlarged cross-sectional view taken along the - line in Fig. 1, Fig. 3 is an explanatory view showing a modified example of the spring member, Fig. 4A,
B and C are explanatory diagrams showing different modifications of the headrest legs. 1... Backrest frame, 2... Bottom, 3, 3a...
Wall part, 5...Headrest, 7...Legs, 8,1
0...Through hole, 9...Support part, 11...Spring member.

Claims (1)

[Claims] 1. A bottom portion, and a wall portion provided with a through hole that is erected on the edge of the bottom portion and into which the legs of the headrest are loosely inserted;
The support part is integrally molded from a synthetic resin, and has a support part that is erected at the bottom part facing the wall part at a distance, is located substantially concentrically with the through hole, and has a through hole into which the leg part is loosely inserted. 1. A headrest support device, comprising: a backrest frame body; the headrest is positioned by a spring member disposed on at least one side of the support portion so as to be able to clamp the legs;