JPH11313726A - Head rest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a more simplified head rest device. SOLUTION: This device is provided with a pair of vertical parts 21 and 22 for fitting a stay 2 to a seat back and a horizontal part 23 for connecting the vertical parts 21 and 22 to each other and supporting a head rest main body 3. A frame 32 where the head rest main body 3 is supported by the horizontal part 23 of the stay 2 and a space A is formed by front and rear side walls 323 and 324. Then, an extending part 231 is formed by bending, which is arranged inside the space A of the frame 32 and can abut on the front and rear side walls 323 and 324 by the rotation of the head rest main body 3 as against the stay 2, in the horizontal part 23 of the stay 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headless body that can be moved by rotating a headless body with respect to a stay, and that the headless body has a resistance to rotation with respect to the stay. The present invention relates to a headless device in which ready movement is prevented.

[0003]

2. Description of the Related Art Conventionally, as this type of headless apparatus, one disclosed in Japanese Utility Model Publication No. 4-14045 has been known. This has a stay, a headless body rotatably supported by the stay, and resistance generating means provided between the stay and the headless body for applying resistance to the rotation of the headless body relative to the stay. is there.

In this conventional apparatus, a stopper separate from the stay is fixed to the stay so as to be in contact with the frame of the headrest body, and this stopper is brought into contact with the frame of the headrest body when the headrest body rotates with respect to the stay. The range of rotation of the headrest body with respect to the stay was defined by contacting the headrest body.

[0005]

However, in the above-mentioned conventional apparatus, a stopper separate from the stay is required to define the range of rotation of the headrest body with respect to the stay. For this reason, the number of parts increases and the headrest device becomes complicated.

Therefore, an object of the present invention is to provide a more simplified headrest device.

[0007]

Configuration of the Invention

[0008]

Means for Solving the Problems The technical means taken in the present invention to solve the above technical problem is that a stay is attached to a seat back and a pair of vertical portions are connected to each other to support the headrest body by connecting the vertical portions. The headrest main body is configured to include a frame formed with a space formed by front and rear side walls supported by the horizontal portion of the stay, and the headrest body is configured to include the horizontal portion of the stay. An extension portion that is arranged in the space of the frame and that can contact the front and rear side walls by turning the headrest body with respect to the stay is bent.

According to this technical means, when the headrest main body is rotated with respect to the stay, the extension range comes into contact with the front and rear side walls, so that the range of rotation of the headrest main body with respect to the stay can be defined. Therefore, the number of parts is reduced as compared with the related art, and a more simplified headrest device can be obtained.

[0010] More preferably, the extending portion of the stay and the front and rear side walls of the frame constitute a stopper for restricting a movable range of the headrest body with respect to the stay.

[0011]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 6, the headless apparatus 1 includes a stay 2 and a headless body 3.

The stay 2 has a pair of vertical portions 21 and 22 and a horizontal portion 23 connecting the vertical portions 21 and 22 to each other. Part 2
31 is bent. Also, the extending portion 2 of the horizontal portion 23
On the outer peripheral surface 23a on the side of the vertical portion 21 with respect to 31, a minute uneven surface 24 in which minute protrusions are formed in a predetermined range in the axial direction is formed. The projections for forming the minute uneven surface 24 are formed in a serration shape or randomly formed. The vertical portions 21 and 22
Is a mounting portion to a seat back (not shown) on which the headless device 1 is supported.

The headless body 3 comprises an elastic body 31, a frame 32, and a pad 33. Elastic body 3
Numeral 1 is made of a material having a certain elastic force (for example, soft resin or rubber), has a rectangular outer surface 31a, and has an inner periphery extending in an axial direction and having minute projections formed in a predetermined range. A surface 34 is provided. The projections for forming the minute uneven surface 34 are formed in a serration shape facing the minute uneven surface 24 on the stay 2 side or are formed at random, and are formed on the headless main body 3 side. 34 and the minute uneven surface 24 on the stay 2 side are engaged with each other. The minute uneven surface 2 on the stay 2 side
4 and the minute uneven surface 34 on the headless body 3 side constitute resistance generating means for giving resistance to the rotation of the headless body 3 with respect to the stay 2 described later. The frame 32 is made of a hard resin material, and forms a rigid body of the headless device 1. The frame 32 has a circular surface 321a facing the outer peripheral surface 23a of the horizontal portion 23 of the stay 2 and a rectangular surface 3 facing the rectangular surface 31a of the elastic body 31.
Horizontal portion 2 of support portion 321 and stay 2 on which 21b is formed
3 and a support portion 322 formed with a circular surface 322a facing the outer peripheral surface 23a and the extending portion 2 of the horizontal portion 23 of the stay 2
The front and rear side walls 324, 3 constituting the space A in which the space 31 is arranged
23, left and right side walls 325, 326 and an upper side wall 327 are integrally formed. The rectangular surface 31a of the elastic body 31
The elastic body 31 and the frame 32 are integrally rotated by opposing the rectangular shape surface 321b of the frame 32. or,
The extending portion 231 of the stay 2 and the front and rear side walls 324 and 323 of the frame 32 constitute a stopper for restricting the range of rotation of the headless body 3 with respect to the stay 2 described later, and the front side wall 324 receives the load as the headless device 1 Make up the surface. Further, the rear side wall 323 is bendable, and the left and right side walls 325, 32
6 are integrally formed with the claw portion 323a. The pad 33 is made of a urethane foam material and constitutes a cushion body of the headless device 1.

The headless device 1 having the above configuration is manufactured as follows.

The horizontal portion 2 including the minute uneven surface 24 of the stay 2
3 is coated with a release agent (not shown).
Set in a mold (not shown) and inject material into a cavity (not shown). Thereby, the elastic body 31 is assembled to the stay 2 at the same time as the formation. At this time,
The minute uneven surface 34 is formed using the minute uneven surface 24. At this time, the minute uneven surface 24 and the minute uneven surface 34 are not fixed by the presence of the release agent. After this,
The stay 2 to which the elastic body 31 is attached is set in a second forming die (not shown), and a material is injected into a cavity (not shown). Thereby, the frame 32 is attached to the stay 2 and the elastic body 31 at the same time as the formation. At this time, circular surfaces 321 a and 322 a are formed using the outer peripheral surface 23 a of the horizontal portion 23 of the stay 2, and a rectangular surface 321 b is formed using the rectangular surface 31 a of the elastic body 31. At this time, the outer peripheral surface 23a and the circular surfaces 321a, 322
a is not fixed by the presence of the release agent.
The rear wall 323 of the frame 31 is formed as shown by a two-dot chain line in FIGS. After that, the rear side wall 323 is bent to engage the claw portions 323a with the left and right side walls 325 and 326 to form the space A, and then the stay 2 on which the elastic body 31 and the frame 32 are assembled is moved to the third molding die. Set in (not shown) and inject material into cavities (not shown). Thus, the pad 33 is assembled to the frame 32 and the stay 2 at the same time when the pad 33 is formed. At this time, since the closed space A is formed around the extending portion 231 of the stay 2, the pad 3 is closed.
At the time of forming 3, the pad 33 does not intrude around the extending portion 231.

As a result, the headless body 3 is assembled to the stay 2 at the same time as the molding, and the headless apparatus 1 is manufactured.

The operation of the headless device 1 will be described.

When the headless body 3 is moved in the front-rear direction with respect to the stay 2, the minute uneven surface 34 is elastically deformed and moves over the minute uneven surface 24 while the headless body 3 is moved.
Rotates around the horizontal portion 23 of the stay 2 within a range until the extending portion 231 and the front and rear side walls 324 and 323 come into contact with the stay 2. Thereby, the headless body 3 is movable, and the front and rear adjustment of the headless device 1 is performed. At this time, the resistance of the rotation of the headless body 3 with respect to the stay 2 is imparted by the movement of the minute uneven surface 34 over the minute uneven surface 24, so that the unintentional movement of the headless body 2 is prevented by this resistance. The Rukoto.

As described above, the headless body 3 rotates with respect to the stay 2 while the minute uneven surface 34 passes over the minute uneven surface 24, and the minute uneven surface 23 moves over the minute uneven surface 34. Headless body 3
The resistance is given to the rotation with respect to the stay 2. Thus, the headless body 3 can be formed on the stay 2 by insert molding, and the minute uneven surface 34 can be formed using the minute uneven surface 24. Therefore, only by selecting the material in consideration of the elastic deformation of the minute uneven surface 34, it is possible to appropriately move and prevent the movement of the headless body 3 without requiring high-precision management. As a result, the manufacture of the headless device 1 can be simplified.

In this embodiment, the resistance generating means is provided only on the vertical portion 21 side with respect to the extending portion 231 of the horizontal portion 23 of the stay 2; however, the extending portion 231 of the horizontal portion 23 of the stay 2 is provided.
It may be formed only on the vertical portion 22 side and on both sides.

[0022]

According to the present invention, the extension formed on the stay is arranged in the space defined by the wall formed on the frame of the headrest body, so that the contact between the extension and the wall is provided. The range of rotation of the headrest main body with respect to the stay can be defined by the contact, and the number of components can be reduced as compared with the related art, so that a simple headrest device can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a headless device according to the present invention as viewed from the front side.

FIG. 2 is a plan view of the headless device according to the present invention as viewed from the front side.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a perspective view of the headless device according to the present invention as viewed from the rear side.

FIG. 5 is a longitudinal sectional view of FIG.

[Explanation of symbols]

 2 Stay 3 Headless body A Space 21, 22 Horizontal part 23 Vertical part 24 Micro uneven surface (resistance generating means) 32 Frame 34 Micro uneven surface (resistance generating means) 231 Extension part 323, 324 Front and rear side walls (wall parts)

Claims (2)

[Claims] 1. A stay attached to a seat back, a headrest body rotatably supported by the stay, and a rotation of the headrest body with respect to the stay provided between the stay and the headrest body. A headrest device having resistance generating means for applying resistance to the headrest device, wherein the stay comprises a pair of vertical portions attached to the seat back and a horizontal portion connecting the vertical portions and supporting the headrest body. The headrest main body includes a frame formed with a space supported by the horizontal portion of the stay and having front and rear side walls, and the headrest body is disposed in the space of the frame in the horizontal portion of the stay. An extension part that can be brought into contact with the front and rear side walls by turning the headrest body with respect to the stay is bent; A headrest device characterized by the above-mentioned. 2. The headrest device according to claim 1, wherein the extending portion of the stay and the front and rear side walls of the frame constitute a stopper for restricting a movable range of the headrest body with respect to the stay.