JPH0141322Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Purpose of the invention (technical field of the invention) The invention is a system for attaching a headrest to the upper part of the seat back using two cylindrical headrest stays that project downward from the lower part of the headrest. The present invention relates to a headrest support structure for a vehicle seat.

(Technical background of the invention) The headrest of a vehicle seat is attached to the upper part of the seat bag so that its height can be adjusted freely.It is supported by a headrest stay projecting downward from the lower part of the headrest. This is done by slidably inserting the rest stay into a cylindrical holder that is buried in the top of the seat bag.

The support structure of this headrest includes two headrest stays, one in which one headrest stay formed in the shape of a plate with a predetermined width is attached to the center of the lower part of the headrest in a hanging manner, and the other in which two headrest stays formed in a columnar shape are attached to the lower part of the headrest. There is a so-called two-stay type in which headrest stays are provided in a hanging manner with predetermined width intervals.

In this type of headrest support structure, the headrest is supported by slidably inserting the headrest stay into the holder, which causes the headrest to wobble in the front, back, left and right directions.

(Prior art and its problems) Conventionally, as a means for preventing the headrest, in other words, the wobbling of the headrest stay, as shown in FIGS. 6 to 8, the headrest stay 1
There is one in which the head rest stay 1 is formed to be slightly curved in the front-rear direction, and the head rest stay 1 is inserted into a holder A in which the cylinder 2 is formed straight.

That is, when the headrest stay 1, which is slightly curved and convex in the front-rear direction, is slidably inserted into a straight cylinder 2 made of relatively flexible synthetic resin, the upper end of the front surface of the inner wall of the cylinder 2 is inserted. 2a and the lower end 2b are the front side 1a of the headrest stay 1
Since the intermediate point 2c of the rear surface of the inner wall of the cylinder 2 comes into contact with the rear surface 1b of the headrest stay 1, rattling of the headrest stay 1 in the front-rear direction is prevented.

On the other hand, in the left-right direction, there is play between the cylinder 2 and the headrest stay 1, which causes rattling. This rattling is prevented by engaging this locking groove 3 with a lock pawl 4a of a lock mechanism 4 provided on the top of the hodder A.

However, in such a means, a support structure is required in which a side surface locking groove 3 is provided in the front and back direction of the headrest stay 1, and a lock pawl 4a of a locking mechanism 4 provided on the holder 3 side is engaged with this locking groove 3. In this case, not only is it impossible to prevent the rattling in the left and right direction, but also the headrest stay 1 is
Since it is fixed at certain points, it is insufficient to prevent rattling in the left and right direction.

(Technical problem of the invention) The technical problem of the invention is that when the headrest support structure includes two stays, regardless of the type of lock mechanism provided on the headrest stay and its holder, the front and rear of the headrest stay and the The purpose is to prevent rattling from side to side.

(b) Structure of the invention (technical means of the invention) In order to solve the above technical problem, the technical means of the invention is that two cylindrical headrest stays are installed at the bottom of the headrest. In a vehicle seat headrest support structure in which the headrest stay is slidably inserted into a holder that projects downward and is buried in the upper part of the seat bag to support the headrest, the tube of the holder is inserted in the front and rear directions and in the left and right directions. It has a curved structure that is a combination of curves and curves.

(Operation of technical means) According to the above technical means, the cylinder of the holder has a curved shape that combines bending in the front-rear direction and the left-right direction;
For example, since the middle of the cylinder is curved into a curved shape that is convex to the rear and to the left, when a cylindrical headrest stay formed as a head plate is inserted into this cylinder, the upper and lower ends of the rear surface of the inner wall of the cylinder are It comes into contact with the rear surface of the headrest stay, and the middle point of the right side of the inner wall of the cylinder comes into contact with the right side of the headrest stay.

Therefore, since the inner wall of the cylinder and the side surface of the headrest stay have contact points in the front-rear direction and the left-right direction, rattling of the head rest stay in the front-rear, left-right direction is prevented.

(c) Effect of the invention As described above, according to the invention, the head rest stay can be prevented from wobbling in the longitudinal and lateral directions only by the cylinder of the holder. There is no need to select the type of locking mechanism for the rest stay.

Furthermore, since the headrest stay is completely prevented from rattling, the discomfort caused by the rattling of the headrest is eliminated.

(b) Embodiment of the invention Next, how the headrest support structure for a vehicle seat according to the invention is actually implemented will be explained with reference to the drawings.

Fig. 1 is a right side sectional view of the headrest support structure of the present invention, Fig. 2 is a front sectional view showing only one side of the headrest support structure of the present invention, and Figs. 3 to 5 are the - to - lines shown in Fig. 2. FIG.

The headrest support structure of the present invention consists of a straight cylindrical headrest stay 1 that hangs down from the bottom of the headrest B in the form of two stays, and a relatively flexible synthetic resin that is embedded in the seat back C. It consists of holder A.

The headrest stay 1 is formed to have an appropriate length necessary for adjusting the height of the headrest B, and has locking grooves 3 cut out at predetermined intervals on its rear side surface.

The holder A consists of an upper locking mechanism (4 parts) and a tube (2) continuing below the locking mechanism.

The cylinder 2 is formed into a cylindrical shape with an appropriate inner diameter to allow the headrest stay 1 to be slidably inserted therein, and is slightly curved into a curved shape in which the middle of the cylinder is convex to the rear and convex to the left. It is formed by

Therefore, when the headrest stay 1 is inserted into the holder A, due to the curved shape of the cylinder 2, the upper end 2b and lower end 2c of the rear surface of the inner wall of the cylinder 2 come into contact with the rear surface 1b of the headrest stay, and the right side of the inner wall of the cylinder 2 comes into contact with the rear surface 1b of the headrest stay. The intermediate point 2f of the headrest stay 1 contacts the right side surface 1c of the headrest stay 1.

In this way, the headrest stay 1 is supported and fixed to the cylinder 2 in a pinch-like manner with a three-point, two-direction support configuration consisting of two points in the front-rear direction and one point in the left-right direction. And it does not wobble even when force is applied in the left and right directions.

Therefore, the intended purpose can be achieved.

In the above embodiments, the shape of the headrest stay is straight, but the headrest stay is not limited to this, and the headrest stay may be formed into a curved shape that is gentler than the curved shape of the cylinder.

Furthermore, the curved shape of the cylinder is not limited to the one shown in the above embodiments, but may be any gently curved shape with bends in two directions: the front-rear direction and the left-right direction.

[Brief explanation of the drawing]

1 to 5 show examples of the headrest support structure of the vehicle seat of the present invention, FIG. 1 is a right side sectional view of the headrest support structure of the present invention, and FIG. 2 is only one side of the headrest support structure of the present invention. 3 is a line end view, FIG. 4 is a - line end view, and FIG. 5 is a - line end view,
6 to 8 show conventional examples, FIG. 6 is a right side sectional view of the headrest support structure, FIG. 7 is a front sectional view showing only one side of the headrest support structure,
FIG. 8 is a perspective view of the holder. In the figure, A is a holder, 1 is a headrest stay, and 2 is a cylinder.

Claims (1)

[Scope of utility model registration request] A cylindrical headrest stay is provided at the bottom of the headrest in a hanging manner in a two-stay installation form, and the headrest stay is slidably inserted into a holder buried in the upper part of the seat bag to support the headrest. A headrest support structure for a vehicle seat, characterized in that the tube of the holder is curved with a curve that combines curves in the front-rear direction and the left-right direction.