JP2001275783A - Headrest device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest device for vehicles with a structure which makes the work inserting a stay into a penetrating hole easy and prevents the stay from being chatteres the penetrating hole. SOLUTION: The diameter of a penetrating hole 3, located on a holder 2, is made a little larger than that of a stay 5. A protruding area 14, which always contacts and gives pressure to the side of the stay 5 because of the smaller diameter of the protruding area 14 than the diameter D of the penetrating hole 3 and the diameter (d) of the stay 5, is formed at a part of the penetrating hole 3 located on the holder 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headrest device.

[0002]

2. Description of the Related Art As a vehicle, for example, a headrest for supporting an occupant's head is provided on the top of a seat back of an automobile (Japanese Utility Model Application Laid-Open No. 2-1412 as a similar technique).
No. 41). The headrest is provided with two stays extending from a lower surface thereof, and these stays are slidably inserted into through holes of a pair of left and right synthetic resin holders provided along the width direction at the top of the seat back. are doing. The vertical position of the headrest can be adjusted by operating a lock mechanism provided on the holder.
The holders are firmly housed in a pair of left and right tubular holder brackets fixed to the frame of the seat back, so that necessary support strength can be obtained.

[0003]

However, in such a conventional technique, since the stay of the headrest is inserted and supported in the through hole of the holder, the distance between the stay and the holder is reduced. If a dimensional error occurs in the width direction of the seat back, the position of the stay does not match the through hole of the holder, and it becomes difficult to insert the stay into the holder. If the through hole of the holder is made slightly larger in diameter than the stay in advance in consideration of a dimensional error in the width direction, the stay may be loose in the through hole.

The present invention has been made by paying attention to such a conventional technique, and the work of inserting the stay into the through hole is easy, and the backlash in the stay through hole can be prevented. A headrest device for a vehicle is provided.

[0005]

According to the first aspect of the present invention, a pair of left and right cylindrical holder brackets are fixed to the top of the seatback along the width direction of the seatback, and the inside of the holder bracket is fixed. A headrest device for a vehicle, in which a holder made of a synthetic resin having a substantially cylindrical shape having a through hole in a vertical direction is provided, and a stay of a headrest is inserted and supported in the through hole of the holder. The diameter of the hole is formed to be slightly larger than the diameter of the stay, and a part of the through hole of the holder is always smaller than the diameter of the through hole and the diameter of the stay. The stay has a convex portion which can be pressed against the side surface.

According to the first aspect of the present invention, since the diameter of the through hole of the holder is slightly larger than the diameter of the stay,
Even if a slight dimensional error occurs in the width direction of the seat back between the stay and the holder, the work of inserting the stay into the through hole is easy. In addition, since the projection is pressed against the stay inserted into the through hole, rattling of the stay in the through hole is prevented.

According to a second aspect of the present invention, the back side of the convex portion of the holder is formed in a concave shape, and is formed in a thin-walled shape which is easily deformed by the side surface of the stay.

According to the second aspect of the present invention, a recessed portion is formed on the back side of the convex portion of the holder, and is formed in a thin-walled shape that is easily deformed by the side surface of the stay. Therefore, the dimensional accuracy between the stay and the holder can be absorbed by the amplitude of the convex portion, and the operating force for moving the position of the stay can be reduced, and the play of the stay can be reliably prevented.

According to a third aspect of the present invention, the root of the convex portion of the holder is projected toward the holder bracket.

According to the third aspect of the present invention, since the holder is securely supported in the holder bracket, the stay can be more securely held without rattling.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred first embodiment of the present invention will be described below with reference to FIGS. In the drawing, X is described as a width direction, Y is a front-rear direction, and Z is a vertical direction. still,
The vertical direction Z is not a vertical direction in a strict sense, but a directionality along the longitudinal direction of the seat back 1 described below.
The width direction X and the front-rear direction Y are also directions orthogonal to the vertical direction Z, respectively.

A pair of left and right holders 2 are provided on the top of the seat back 1. The holder 2 is an injection molded product made of a synthetic resin. A through hole 3 is formed in the holder 2 in the vertical direction, and two stays 5 extending from the lower surface of the headrest 4 are inserted into the through hole 3. A lock portion 6 is provided on one of the holders 2, and the tip of the lock portion 6 is selectively engaged with a plurality of notch grooves (not shown) formed on the side surface of the corresponding stay 5. The headrest 4 can be fixed at an arbitrary vertical position.

A pair of left and right cylindrical holder brackets 8 and 8 are fixed to a frame 7 as a skeletal member disposed inside the seat back 1. It is mounted with the holder 2 inserted. At the lower end of the holder 2, a claw portion 9 that engages with the lower end of the holder bracket 8 is formed, and at the upper end, a flange-shaped head 10 that is exposed on the upper surface of the seat back 1 is formed. Notches 11 are formed in the claw portion 9 at two opposing positions to allow inward elastic deformation. A rib 12 is formed on the lower side of the head 10, and the rib 12 is formed in a groove 13 formed on the upper end of the holder bracket 8.
Is engaged. Therefore, the rotation of the holder 2 in the holder bracket 8 is prevented by the ribs 12 and the groove portions 13.

The diameter D of the general portion of the through hole 3 of the holder 2 is
The stay 5 is formed to be slightly larger than the diameter d. A part of the through-hole 3 of the holder 2 is always smaller than the diameter D of the through-hole 3 and the diameter d of the stay 5, so that the protrusion 14 can be pressed against the side surface of the stay 5. Is formed. Further, the convex portion 14 of the holder 2
A concave portion 15 is formed on the back surface side, and the concave portion 15 is formed in a thin shape by the side surface of the stay 5 so that the concave portion 15 can be easily deformed to a nearly flat state.

In this embodiment, since the holder 2 has such a configuration, the diameter D of the through hole 3 is equal to the diameter d of the stay 5.
Therefore, even if some dimensional error occurs in the width direction X between the stay 5 and the holder 2, the work of inserting the stay 5 into the through hole 3 is facilitated by the large diameter D of the through hole 3.

The side surfaces of the stay 5 inserted into the through-hole 3 are provided with protrusions 14, 1 so as to be sandwiched from both sides in the width direction X.
4 are pressed against each other, so that the stay 5 in the through hole 3
Rattling is prevented. Due to the pressure contact between the stay 5 and the convex portions 14, 14, rattling in the front-back direction as well as in the width direction X is prevented. The rattling prevention in the front-rear direction Y is further improved by narrowing the interval between the two convex portions 14 and 14 to increase the contact force, or changing the shape of the tip of the convex portion 14 that contacts the stay 5. Can be.

On the back side of the convex portion 14 of the holder 2, there is a concave portion 15 which is formed in a concave shape and is formed in a thin shape which is easily deformed by the side surface of the stay 5. The accuracy of the dimensions of the holder 5 and the holder 2 is
4, the operating force for moving the position of the stay 5 is light, and the play of the stay 5 can be reliably prevented.

FIG. 5 shows a second embodiment of the present invention.
That is, both root portions 16 of the convex portions 14 of the holder 2 are protruded toward the holder bracket 8. In such a case, the holder 2 is securely supported in the holder bracket 8, so that the stay 5 is moved. As a result, it is possible to securely hold the apparatus without rattling.

[0019]

According to the first aspect of the present invention, since the diameter of the through hole of the holder is slightly larger than the diameter of the stay, the dimensional error in the width direction of the seat back between the stay and the holder. Even if a slight occurrence occurs, the work of inserting the stay into the through hole is easy. In addition, since the projection is pressed against the stay inserted into the through hole, rattling of the stay in the through hole is prevented.

According to the second aspect of the present invention, on the back side of the convex portion of the holder, there is a concave portion formed to be concave, and the stay is formed in a thin-walled shape which is easily deformed by the side surface of the stay. Therefore, the dimensional accuracy between the stay and the holder can be absorbed by the amplitude of the convex portion, and the operating force for moving the position of the stay can be reduced, and the play of the stay can be reliably prevented.

According to the third aspect of the present invention, since the holder is securely supported in the holder bracket, the stay can be more securely held without rattling.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a vehicle headrest device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a peripheral structure of a holder of FIG. 1;

FIG. 3 is a sectional view taken along the line SA-SA shown in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a state where a stay of a headrest is engaged with the holder of FIG. 2;

FIG. 5 is a sectional view corresponding to FIG. 3 according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat back 2 Holder 3 Through hole 4 Headrest 5 Stay 8 Holder bracket 14 Convex part 15 Depression part 16 Root part X Width direction Y Front-back direction Z Vertical direction D Diameter of through hole d Diameter of stay hole

Claims (3)

[Claims] A pair of left and right cylindrical holder brackets are fixed to the top of a seat back along the width direction of the seat back, and a substantially cylindrical holder bracket having a vertical through hole inside the holder bracket. A vehicle headrest device in which a holder made of a synthetic resin is installed and a stay of a headrest is inserted and supported in a through hole of the holder, wherein a diameter of the through hole of the holder is slightly larger than a diameter of the stay. In addition to forming a diameter, a part of the through hole of the holder is always smaller than the diameter of the through hole and the diameter of the stay, thereby forming a convex portion that can be pressed against the side surface of the stay. A headrest device for a vehicle, comprising: 2. The vehicle headrest device according to claim 1, wherein the rear surface side of the convex portion of the holder is formed in a concave shape, and is formed in a thin-walled shape that is easily deformed by a side surface of the stay. A headrest device for a vehicle, comprising: 3. The vehicle headrest device according to claim 1, wherein a root portion of the convex portion of the holder protrudes toward a holder bracket.