JPS62122610A - Headrest insert - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a headrest insert for a vehicle, and more particularly to a headrest insert in which a supporting stay is movably attached to the insert.

(Prior Art) In recent years, vehicle headrests having a height adjustment mechanism have been increasingly adopted so that the height can be adjusted according to the sitting height of an occupant. This height adjustment mechanism is sometimes installed at the top of the seatback to which the headrest is attached, and sometimes built into the headrest itself, but in the former case, the seatback is large and the distance from the rear seat is small. The latter type, which has a built-in headrest, tends to be used more frequently because it has the drawbacks of poor comfort and increased weight of the seat back.

By the way, when this height adjustment mechanism is built into the headrest, the mechanism is installed in a reinforcing material (usually called an insert, herein referred to as an insert) embedded in the cushion body of the headrest. In most cases, the stay is built into the insert and the stay is movable relative to the insert. As shown in FIG. 6, a typical example of this mechanism is as shown in FIG. A stay 20a provided on the other side and provided with a locking notch 21a on the other side.
is inserted into the stay insertion hole 12a, and then inserted into the through hole 30.
Insert the spring-like clip 40a into the clip 40a.
By resiliently locking the stay 20a into the notch 21a of the stay 20a, the stay can be moved in stages relative to the insert.

(Problems to be Solved by the Invention) This insert 10a with a stay is then inserted into the headrest skin 60a as shown in FIG.
In 0a, a liquid raw material such as foamed polyurethane is injected into the skin 60a and foamed, so that it is integrated with the skin 60a. At this time, the stay attachment part 11a having the height adjustment mechanism, particularly the clip insertion hole 30a, is set to be located outside the epidermis 60a in case the mechanism fails; In order to minimize exposure from the epidermis 60a, the through hole 30a is cut into the mold 50a.
It is done by placing it in the wall. However, when a liquid raw material such as foamed polyurethane is foamed, it fills the inside of the skin 6Qa and expands so as to press the skin against the inner wall of the mold, but at this time, it often overflows from the insert insertion opening 61 of the skin 60a. . Therefore, the overflowing raw material often crowds the through hole 30a or the stay insertion hole 12a and obstructs the height adjustment mechanism. Although the mold structure is such that the stay attachment portion is tightened by the mold 50a to prevent such problems, the actual situation is that the inserts have variations in shape and cannot be completely prevented. Therefore, the foam that has entered the through holes etc. is removed after molding, but it is difficult to completely remove it because it is connected to the clip etc. in the mechanism, and it interferes with the mobility of the stay and the locking force of the clip. is often left behind.

(Means for Solving the Problems) Therefore, the present invention aims to provide a new headrest insert that eliminates these drawbacks, and its gist is that a stay is movably attached to the insert. The headrest insert is characterized in that a stay attachment portion of the insert and a predetermined length of the stay extending from the attachment portion are covered with a continuous cylindrical body.

(Function) As described above, the present invention is formed by covering the stay attachment portion of the insert and the predetermined length of the stay extending from the attachment portion with a continuous cylindrical body. The communicating hole is closed with a cylindrical body. Therefore, even if the insert with stay is inserted into the epidermis and the foaming raw material is injected and foamed, the raw material is prevented from entering the mechanism, and the height adjustment mechanism can be operated normally. In addition, since the raw material foam spilling out of the skin can be removed by cutting and removing the cylindrical body along the skin, finishing work is extremely easy and workability is improved.

(Example) The present invention will be explained below based on examples.

Figures 1 (a) and (b) are a front view and right side view of main parts of a headrest insert with a stay according to an embodiment of the present invention, and Figure 2 is a partially cutaway enlarged view taken along line A-A in Figure 1. Third
The figure is a front view of main parts of another embodiment.

The headrest insert 10 consists of a hollow body with a hollow interior, and a substantially cylindrical stay attachment part 11 is provided at a predetermined position in the lower part of the headrest insert 10.
is provided. The attachment part 11 has a style 2 inside.
0 insertion hole 12 and a through hole 13 that is perpendicular to the insertion hole 12 from the outer surface of the attachment part, and a stay 20 having a notch 21 on the negative side inserted into the insertion hole 12 and the through hole. By engagement with the U-shaped clip 30 inserted into the stay 13, a height adjustment mechanism is configured that allows the stay 20 to move in stages.

As described above, the stay 20 is made of a rod-shaped or tubular metal body having a notch 21 on one side, and the portion having the notch 21 is located near the stay attachment portion 11 so that the stay 20 can slide inside the stay attachment portion 11. installed within the insert 10. The insert 10 is usually made of plastic such as polyethylene, polypropylene, ABS resin, etc., and is configured such that one end of the stay 20 or the middle of the U-shaped stay can be accommodated in its hollow interior. The clip 30 is made of a substantially U-shaped steel wire or the like, and is formed so as to clamp the stay 20 by elastically opening and closing its U-shaped legs.

A clip 3 is provided on the outer surface of the stay attachment portion 11.
A cylindrical body 40 is attached so as to continuously cover the through hole 13 for zero insertion and a predetermined length of the stay 20 that protrudes and extends from the mounting portion 11 . If there is a step between the mounting part 11 and the stay 20 due to the difference in diameter as shown in the figure, this cylindrical body 40 is covered according to the shape, and as shown in FIG. When 11 is a tubular body with different diameters, it is coated so as to fit tightly according to its curved surface.The tubular body 40 is a film-like cylinder or a thin flexible polyurethane foam layer is coated on the inner surface of the cylinder. It is preferable that the cylindrical body 40 has a foamed plastic layer, such as a foamed plastic layer, so as not to increase the diameter of the stay attachment part 11, etc. Also, it is preferable that the cylindrical body 40 is formed from a heat-shrinkable cylindrical body such as a stretched plastic film. For example, as shown in FIG.
The cylinders 41.a and 41b are attached to the stay 20 and the mounting part 11, and heat is applied from the outer surface to shrink the cylinders 41.41a and 41b, so that the surface of the mounting part, etc. It is preferable to form the cylindrical body 40 in close contact with the cylindrical body 40 . In that case, as shown in FIG. 2, a locking part 14 such as a protrusion or a protrusion is provided on the outer surface of the mounting part so that the cylindrical body 40 is locked and positioned when the cylinder contracts. is preferable. In addition, in the case where the mounting part 11 is made of a tubular body having different diameters as shown in FIG. 3, the large diameter part becomes the positioning locking part 14. In addition, when the inner surface of the cylindrical body 41b is coated with a thin foamed plastic layer 42, when the cylindrical body 41b is contracted, the foamed plastic layer first comes into close contact with the surface of the attachment part to form a friction layer, and the cylindrical body is held at a predetermined position. 40 will be molded and coated.

(Effects) As shown in FIG. It is installed together with the epidermis 60 within the epidermis and is fixed within the epidermis 60 by injecting and foaming a liquid raw material such as polyurethane foam into the epidermis. Since the section 11 and the predetermined length of the stay 20 extending from the core are covered with the cylindrical body 40, in other words, the through hole 30 for the mechanism and the insertion hole 12 of the stay 20 are closed, so that the mechanism The risk of liquid raw material entering the inside is almost eliminated, and there is no risk of impairing the function of the mechanism. In addition, in the case where the cylindrical body 40 has a foamed plastic layer on the inner surface, this layer further acts as a sheet material and a buffer layer, so when the stay attachment part 11 is tightened with the wall of the mold 50, The mold is sealed tightly without any gaps. Furthermore, even if a gap is created in the tightening part, the foam of the liquid raw material will only adhere to the outer surface of the cylindrical body covered with the stay.
It can be easily removed by cutting the cylindrical body along the outer surface of the epidermis, and has the advantage of simplifying finishing work.

[Brief explanation of drawings]

Figures 1 (A) and (B) are front half and side views of the headrest insert of the present invention, Figure 2 is a perspective view of the first example, and Figure 5 is a perspective view of the first example.
The figure is an enlarged cross-sectional view of the main part of the insert of the present invention installed in a mold, and FIG. 6 is a perspective view showing an example of the movable adjustment mechanism of the stay.
FIG. 7 is an enlarged sectional view of a main part of a conventional insert installed in a mold.

Claims (4)

[Claims] (1) A headrest insert in which a stay is movably attached to the insert, characterized in that a stay attachment portion of the insert and a predetermined length of the stay extending from the attachment portion are covered with a continuous cylindrical body. (2) The headrest insert according to claim 1, wherein a locking portion is provided on the surface of the stay attachment portion. (3) The headrest insert according to claim 1 or 2, wherein the cylindrical body is formed from a heat-shrinkable film. (4) The headrest insert according to any one of claims 1 to 3, wherein the cylindrical body has a sealing layer on its inner surface.