JPS6236659Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest for a vehicle seat such as an automobile, and more particularly to a headrest that is height adjustable and has an operating knob for unlocking.

Conventionally, as shown in FIG. 1, this type of head rest has a stopper 30' that engages with the engagement groove 11 of the stay 10, disposed on the upper part of a holder 20' through which the stay 10 is inserted, and this stopper 30'. Holder 2
The spring 33' embedded in the spring 33' is biased to engage with the engagement groove 11 of the stay 10, and this spring 3
The engagement state of the stopper 30' is released by pressing the operation knob 31' in the direction of the arrow against the resilient force of the stopper 30'. Therefore, a lock structure with a lock release means requires at least three independent members: a holder, a stopper, and a spring for the lock, which not only makes parts management difficult, but also requires a large number of parts. Assembly and manufacturing of each part required time and effort.

The present invention was developed in view of the above circumstances, and aims to reduce the number of parts and facilitate the manufacture and assembly of each part.

In order to achieve the above object, the headrest of the vehicle seat of the present invention has a stopper integrated with an operation knob that punches a flat spring material into a hole slightly larger than the cross-sectional shape of the stay, leaving the stopper part intact. A stay insertion hole and an elastic piece formed simultaneously by punching out the stay and coming into elastic pressure contact with the side wall of the holder are provided, and a long hole is provided in the locking portion, and a guide pin inserted into the holder is inserted into the long hole. This is what happens.

Therefore, when the operating knob is pushed against the elasticity of the bullet that comes into contact with the holder, the stopper where the locking part engages with the stay slides, the locking part is released from the stay, and the lock is released. be done. Further, after adjusting the height of the headrest to a predetermined position, the locking portion of the stopper engages with the stay due to the elasticity of the bullet, and the locked state is maintained.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a seat having a headrest according to the present invention, in which A is the seatback, a and a' are seat frames that constitute the seatback A, and B is the headrest body, and the headrest body B is attached to the stay 10. It is inserted through a piece 40 into a holder 20 fixed to the seat frames a, a' so as to be movable in the vertical direction. And this stay 1
0 has engagement grooves 11, 1 on one side wall thereof in a multi-step manner in the upper and lower parts.
1 and 11 are notched, and each engagement groove 11 shown in the figure is
The lower side is formed to be perpendicular to the axial direction of the stay 10, and the upper side is formed to be inclined, so that the stay 10 can freely move downward even when a stopper 30, which will be described later, is engaged.

The holder 20 is a cylindrical body made of a hard material such as a hard synthetic resin, and a thick stopper attachment part 21 is attached to the upper part of the holder 20.
is provided, and its mounting portion 21 is attached to the seat back A.
Attach the mounting piece 40 with the bolt 23 so that it is exposed to the
Fixed to. A mounting hole 22 into which a stopper 30 is inserted is opened from one side of the mounting portion 21. Note that the mounting piece 4 for fixing the holder 40
Reference numeral 0 denotes a metal plate welded between seat frames a and a', and a through hole for inserting and supporting a holder 40 is opened in the upper and lower parts of the metal plate.

The stopper 30 has a stay insertion hole 32 formed by punching a flat spring plate such as a steel plate into a shape slightly larger than the cross-sectional shape of the stay 10, leaving one side intact.
, a bullet piece 33 formed by punching out the same, and a synthetic resin operation knob 31 integrally formed on an upright portion 36 at one end of the bullet piece 33 side.
The mouth edge of the above-mentioned stay insertion hole 32 is used as an engaging part 34, and a long hole 35 for a guide is provided on the side of this engaging part.
A guide pin 37 inserted into the holder 20 is inserted into the elongated hole 35 . Further, the bullet piece 33 is brought into elastic pressure contact with the side wall of the holder 20, and urges the stopper 30 in a direction opposite to the direction of the arrow in FIG. Therefore, when the operating knob 31 of the stopper 30 is pushed in the direction of the arrow against the elastic force of the bullet piece 33, the stopper 30 moves along the elongated hole 35.
The engaging portion 34 of the stopper 30 escapes from the engaging groove 11 of the stay 10, and the stay 10 can freely move not only upward but also downward. Therefore, after adjusting the headrest main body B to an appropriate height, the operating knob 31
When the pressed state is released, the stopper 30 moves by the resilient force of the bullet 33, and its engaging portion 34 is engaged with the engaging groove 11 at a predetermined position, resulting in a locked state.

As mentioned above, the present invention eliminates the need for the conventional spring molded separately from the stopper, so the number of parts is reduced, parts management is easy, and assembly is simple and workability can be improved. Moreover, because there are fewer parts, there is less chance of failure compared to conventional products.
Further, since the stopper can be formed by punching and forming the bullet piece at the same time as the stay insertion hole, the stopper itself can be manufactured easily and has high productivity.

In addition, since the bullet pieces are in elastic contact with the holder and not the stay, the vertical movement of the stay by the bullet pieces is not impaired when the lock is released, and a stopper with an operation knob is integrated into the holder. After that, it can be fixed to the seat frame of the seat bag, thereby improving the ease of assembling the seat bag to the seat frame. Furthermore, since the bullet, the locking part, and the operating knob are integrated, the lock can be reliably unlocked by the operating force of the operating knob and locked by the elasticity of the bullet, and no rattling occurs.
The interlocking of the operating force of the operating knob and the like with the locking portion is improved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the conventional product, Fig. 2 to 4 show the present invention, Fig. 2 is a perspective view, Fig. 3 is a longitudinal sectional view of the main part, and Fig. 4 is a perspective view of the main part. It is a diagram. In the figure, 10 is a stay, 20 is a holder, 30 is a stopper, 31 is an operation knob, 32 is a stay insertion hole,
33 indicates each bullet piece.

Claims (1)

[Scope of utility model registration request] It consists of a stay that has engagement grooves in multiple vertical stages on the side wall, a cylindrical holder through which this stay is inserted and fixed to the seat frame, and a stopper with an operation knob that is attached to this holder and engages with the engagement groove of the stay. , the stopper has a stay insertion hole formed by punching a hole slightly larger than the cross-sectional shape of the stay, leaving the locking part of the flat spring material, and the stopper is simultaneously formed by the punching and comes into elastic contact with the side wall of the holder. What is claimed is: 1. A headrest for a vehicle seat, comprising a bullet piece, the locking portion having a long hole, and a guide pin inserted in the holder being inserted into the long hole.