JPS6018113Y2 - Headrest height adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest height adjustment device for a seat.

Conventionally, most general headrest height adjustment devices are adjusted by operating against the force of a loaded spring, and the operation is heavy when trying to securely hold the headrest in the desired position, and difficult when trying to make it easier to operate. However, there was a drawback that the headrest's holding power was weakened, making it unstable.

Although there are some embodiments in which this drawback has been solved, the operation and configuration become complicated and the cost increases.

The present invention was devised to eliminate the above-mentioned drawbacks of the conventional example, and is a headrest height adjustment that allows the headrest to be easily adjusted up and down by operating a knob, and to ensure that the headrest is held at the desired height. It provides equipment.

That is, the present invention includes a stay guide that is biased upwardly by a compression coil spring against a headrest bracket and arranged to be movable up and down, and a notch formed in the stay guide that slopes downward in the diametrical direction of the stay guide. , a lock groove spring that engages the notch and the lock groove of the headrest stay, is inserted into the headrest bracket, and is biased in the direction of engagement in the lock groove, and the stay guide is moved downwardly. The headrest height adjusting device is characterized in that the notch portion pushes the lock spring outward and releases the engagement with the lock groove of the headrest stay.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 a and b show the headrest height adjustment device of the present invention, FIG. 1 is a front view, and FIG.
3 is a developed view showing the constituent parts of the device; FIG. 4 is a sectional view taken along line B-B in FIG. 2;
Figures a and b are enlarged cross-sectional views of section C in Figure 2, in which a is a headrest holding portion and b is a cross-sectional view showing a state in which the headrest is unlocked and can be moved up and down.

In FIGS. 2 and 3, a headrest bracket 1 is welded to a back frame 8, and has sliding holes 12 formed in the top and bottom through which the stay guides 2 are inserted.

The stay guide 2 has a large-diameter push-in part 5 at the top, an inclined notch 6 at the middle diameter part, through which the compression coil spring 3 is inserted and biased, and the small-diameter part at the lower end is the headrest bracket 1. It has an outer diameter that matches the inner diameter of the sliding hole 12, and the tip is divided into two or three parts and a tapered protrusion 7 is formed on the outside. It is pushed into the sliding hole 12 and becomes an upper limit stopper.

Also, indigenous elongated holes 14 for installing lock springs 4 on both sides.
is provided.

As shown in FIG. 2, a headrest stay 9 whose upper portion is fixed to a headrest 15 and has a plurality of lock grooves 13 is inserted through the stay guide 2. As shown in FIG.

A grommet 11 is loaded into the insertion part of the backrest trimming cover 10 of the push-in part 5 to improve the appearance.

In the assembled state, as shown in FIGS. 2 and 4, the lock spring 4 is inserted into the elongated hole 14, and the straight portion of the lock spring 4 is inserted into the notch 6 of the stay guide 2 and the lock groove 13 of the headrest stay 9. are held at the same time to hold the headrest 5.

The device of the present invention may be provided on one side of the stay 9, and the other may be provided with only a holder.

When adjusting the height of the headrest 15, first push the push-in portion 5 in the direction of the broken line arrow against the compression coil spring 3, and the notch 6 shown in FIG. The lock spring 4 is moved in the direction of the solid arrow by the upwardly inclined portion, and the stay 9 is unlocked and can move up and down.

Therefore, if you move the headrest 15 up and down arbitrarily and release it at the appropriate lock groove 13 of the stay 9, the compression coil spring 3
The pushing part 5 returns with the force of , and at the same time the lock spring 4
As a result, the alignment portion between the notch portion 6 and the lock groove 13 is engaged, and the headrest 15 is securely held.

The headrest height adjustment device of the present invention is easy to operate because the stay can be moved up and down without any resistance by simply pushing the headrest stay guide head, and can be securely held in any position. Even if it becomes necessary to remove the headrest from the seat, it can be easily removed.

[Brief explanation of the drawing]

Figures 1 to 5 a and b show the headrest height adjustment device of the present invention, Figure 1 is a front view, and Figure 2 is the same as A in Figure 1.
- A cross-sectional view taken along the line A; FIG. 3 is a developed view showing the constituent parts of the device; FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 2;
Figures a and b are enlarged cross-sectional views of section C in Fig. 2, in which a is a cross-sectional view showing a state in which the headrest is fixed, and b is a cross-sectional view in which the headrest is unlocked and can be moved up and down. 1...Headrest bracket, 2...
・Stay guide, 3... Compression coil spring, 4.
... Tatsuku spring, 5 ... Push-in part, 6 ... Notch part, 7 ... Taper protrusion, 9 ... Headrest stay, 12...
...Sliding hole, 13, curve, lock groove, 14...
Long hole, 15...Headrest.

Claims (1)

[Scope of utility model registration request] A stay guide 2 is biased upwardly by a compression coil spring 3 against the headrest bracket 1 and arranged to be movable up and down.
and a notch 6 formed in the stay guide that slopes downward in the stay guide diametrical direction; A lock spring 4 is provided which is biased in the direction of engaging in the lock groove, and when the stay guide moves downward, the notch part pushes the lock spring outward and engages the lock groove of the headrest stay. A headrest height adjustment device characterized by disengaging.