JP2001178581A - Headrest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest device having a swing center of a headrest body positioning at the upper part of the headrest body in the headrest device in which the headrest body is able to swing forward and backward around the center of an upper end connection part of a stay. SOLUTION: A headrest frame 20a constituting a headrest body 20 is formed into a box, provided with a fitting groove in an approximately U shape inside which an upper part of a stay 10 is fitted into and extends downward. The fitting groove is provided with an upper groove part 23a into which the upper end connection part 13 of the stay 10 is fitted and a pair of side groove parts 23b, 23c continuously extending downward from each of right and left thereof. Each of leg parts 11, 12 of the stay fits with each of side groove parts and downward penetrates the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a headrest device.

[0002]

2. Description of the Related Art As one type of a headrest device, a gate-shaped stay held at the top of a seat back and a connecting portion connecting the upper ends of both left and right legs of the stay are rotatably supported in the front-rear direction. Headrest frame and
A headrest device of a type including a headrest pad surrounding the headrest frame and forming a headrest body together with the headrest frame, wherein the headrest body is configured to be rotatable in a front-rear direction around a connecting portion of the stay as a rotation center, One example is disclosed in JP-A-9-38.
No. 2 and JP-A-9-149837.

[0003]

By the way, in the headrest device proposed in the former publication, the headrest frame is supported at its lower end by a connecting portion forming the upper end of the stay. The center of rotation of the headrest body is located at the lower end. For this reason, when the occupant of the seat cushion supports the head on the headrest main body, the head hits a portion above the rotation center of the headrest main body, and it is difficult to support the head in a stable state.

In the headrest device proposed in the latter publication, the headrest frame is supported at its upper end by a connecting portion forming the upper end of the stay. Is located at the upper end. For this reason, when the seat cushion occupant supports the head on the headrest main body, the head hits a portion equal to or lower than the center of rotation of the headrest main body, and thus the head is supported in a stable state. be able to.

[0005] However, in the headrest device, the headrest frame has a state in which the flat plate is bent in a V-shape at the front and rear center portions, and is supported in a state of protruding far forward of the stay. For this reason, if the headrest pad is formed sufficiently thick on the headrest frame in this state while surrounding the headrest frame, the headrest body will protrude further to the front of the stay, and the supporting portion of the head of the seated person will be Since the headrest body is located forward of the seat back, the usability of the headrest body is poor, and the occupant cannot sit in a stable state. In order to cope with this, if the headrest pad is formed to have a small thickness, the headrest body loses the cushioning performance and cannot comfortably support the head of the seated person.

[0006] In the headrest device,
Because the headrest body is formed wider on the left and right than the legs of the stay and located on the front side, when the headrest pad is foamed integrally with the headrest frame with urethane etc., the headrest body is related to the stay Thus, a structure in which rotation in the front-rear direction is largely restricted or cannot be rotated is obtained.

FIG. 12 shows a rotation center O of the headrest body.
Indicates a headrest device H located above the head m of the seated person M of the seat cushion C1. In the headrest device H, the occupant M on the seat cushion C1 has the back supported by the seatback C2 and the head m
Is supported on the headrest main body, the head m hits a portion above the rotation center O of the headrest main body, so it is difficult to support the head m in a stable state.

Accordingly, it is an object of the present invention to provide a headrest device which can solve the problems of both headrest devices.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a headrest device, and a first headrest device according to the present invention comprises a gate-shaped stay held at the top of a seat back, and left and right legs of the stay. A headrest frame rotatably supported in a front-rear direction at an upper end portion at a connection portion connecting the upper end portion, and a headrest pad surrounding the headrest frame and forming a headrest body together with the headrest frame; Is a headrest device that is configured to be rotatable in the front-rear direction around a connecting portion of the stay as a rotation center.

In the headrest device, the headrest frame has a box-like shape, and has a substantially U-shaped fitting groove extending downward so that a portion above the stay is fitted therein. The fitting groove has an upper groove portion in which the connecting portion of the stay is fitted and accommodated, and extends downward continuously from left and right ends of the upper groove portion, and right and left legs of the stay are fitted. And a pair of left and right side grooves that penetrate downward, and the upper groove is formed in a shape that imparts a predetermined rotational frictional force to a connected portion of the stay that is housed, and The side groove portion is formed in a shape that allows a predetermined amount of rotation in the front-rear direction around the connecting portion of the stay of the headrest frame.

In the headrest device, the stay is formed by bending a cylindrical rod into a substantially U-shape.
The upper groove portion of the headrest frame is formed in a circular cross section corresponding to the connecting portion of the stay, and each side groove portion of the headrest frame is formed in a rectangular cross section that allows the stay to rotate in the front-rear direction. It can be configured to be formed. In the headrest device, the headrest frame is formed of a front and rear box and a cover made of a synthetic resin, and the box and the cover are fitted to each other from the front and rear to form a box-shaped frame. It can be configured.

A second headrest device according to the present invention comprises:
A gate-shaped stay held at the top of the seat back, a headrest frame supported at the upper end of the stay at the connecting portion connecting the upper ends of the left and right legs so as to be movable in the front-rear direction, and the headrest frame. A headrest device including a headrest pad that surrounds and forms a headrest main body together with the headrest frame, and the headrest main body is configured to be movable in a front-rear direction around a connecting portion of the stay.

According to the headrest device, the headrest frame has a box-like shape and has a substantially U-shaped fitting groove extending downward so that a portion above the stay is fitted therein. The fitting groove is an upper groove portion in which the connection portion of the stay is fitted and accommodated, and extends downward continuously from left and right ends of the upper groove portion, and right and left legs of the stay are fitted. A pair of left and right side grooves penetrating downward, the upper groove is formed in a shape that applies a predetermined sliding frictional force to a connection portion of the accommodated stay, and each of the side grooves is The headrest frame is formed in a shape allowing a predetermined amount of movement in the front-rear direction.

In the headrest device, the stay is formed by bending a cylindrical rod into a substantially U-shape, and the upper groove portion and each side groove portion of the headrest frame are formed in a rectangular shape allowing the stay to move in the front-rear direction. Can be formed. Further, in the headrest device, the headrest frame is formed of a pair of front and rear boxes and a lid made of synthetic resin, and the box and the lid are fitted to each other from the front and rear to form a box-shaped frame. It can be configured to be formed.

[0015]

According to each headrest device according to the present invention, the headrest frame is supported by the connecting portion constituting the upper end of the stay at the upper end, and the center of rotation of the headrest body is It is located at its upper end. Therefore, when the occupant of the seat cushion supports the head on the headrest main body, the head hits the center of rotation of the headrest main body or a portion near the headrest main body, so that the head can be supported in a stable state. .

Further, according to each headrest device according to the present invention, the headrest frame has a structure in which the stay is built in, so that the headrest frame does not protrude greatly in front of the stay, and a sufficient thickness of the headrest pad can be ensured. Thus, the performance of the headrest body can be improved.

According to each headrest device of the present invention, since the headrest frame has a built-in stay and is not restricted from turning or moving in the front-rear direction depending on the headrest pad, the headrest pad is made of urethane or the like. Even when foam molding is performed integrally with the headrest frame, rotation or movement of the headrest body in the front-rear direction is not restricted by the headrest pad.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a vehicle seat equipped with a headrest device according to an example of the present invention, and FIG. 1 shows a first headrest device according to the invention. The vehicle seat includes a seat cushion C1, and a seat back C2 supported at the rear end of the seat cushion C1 via a reclining mechanism so as to be rotatable in the front-rear direction. A headrest device H is mounted on the top of the seat back C2. It is attached.

As shown in FIGS. 2 to 7, the headrest device H includes a gate-shaped stay 10 and a headrest body 20. The stay 10 is formed by bending a rod, and is formed in a gate shape having both left and right legs 11, 12 and an upper end connecting portion 13 for connecting upper ends of the both legs 11, 12 to each other. The headrest main body 20 includes a headrest frame 20a and a headrest pad 20b, and the headrest frame 20a is assembled to the upper end connecting portion 13 of the stay 10. The headrest pad 20b is made of urethane foam. The headrest pad 20b is formed by foaming urethane in an integrated state where the headrest frame 20a is assembled to the stay 10. The headrest pad 20b surrounds the headrest frame 20a together with the stay 10, and forms a headrest body 20.

The headrest frame 20a includes a front box 21 made of synthetic resin and a rear lid 22 made of synthetic resin. The box body 21 has a rectangular shape that is long to the left and right, and includes a front wall portion 21a, a horizontally long rectangular outer peripheral frame portion 21b protruding rearward from an outer peripheral edge thereof, and a central portion on the back surface of the front wall portion 21a. It is constituted by a vertically-long rectangular central frame portion 21c protruding rearward. In the box body 21 having such a configuration, the notch portions 21d are formed in the right and left portions of the central frame portion 21c in the portion below the outer peripheral frame portion 21b.
Are formed, and a semicircular receiving portion 21e extending in the lateral direction is formed at a portion above the central frame portion 21c. A pair of upper and lower locking holes 21f and 21g are formed on the inner surface of each side of the outer peripheral frame 21b.

In the box 21, the receiving portion 21e is formed in a shape for receiving the upper end connecting portion 13 of the stay 10, and each cutout 21d is formed in the upper end connecting portion 1 of the stay 10.
3 is received by the receiving portion 21e, and each leg 11,
12 is formed in a shape penetrating and extending downward.

The lid 22 has a rectangular shape that is long on the left and right, and has the same shape as the front wall 21 a of the box 21.
a, a gate-shaped fitting groove 22b extending rearward is formed in the center of the front wall portion 22a. Lid 2 having such a configuration
In 2, a pair of upper and lower locking claws 22c and 22d are formed at left and right portions on the front surface of the front wall portion 22a. Each locking claw 22c, 22d is formed with each locking hole 21f, 2
It is formed in a shape that is detachably engaged with 1 g. The fitting groove 22b is formed in a shape to fit the upper part of the stay 10, and the upper part 22b1 is formed in a semicircular shape for receiving the upper end connecting part 13 of the stay 10,
Each side 22b2 is connected to each leg 11, 1 of the stay 10.
2 is formed in a rectangular shape that extends downward through it.

In the lid 22 having such a configuration, the upper portion of the stay 10 is fitted in the fitting groove 22b.
The box 21 is brought into contact with the end face of the outer peripheral frame portion 21b. As a result, the locking claws 22c and 22d of the lid 22 are locked in the locking holes 21f and 21g of the box 21, and the lid 22 is
1 and the box 21 together with the stay 1
Box-shaped headrest frame 20 for housing the upper part of
a is formed. In this state, the upper part 22b1 of the fitting groove 22b of the lid 22 is
1e, an upper groove portion 23a having a circular cross section to which the upper end connecting portion 13 of the stay 10 is fitted is formed. Each side portion 22b2 of the fitting groove 22b of the lid 22 is formed together with the front wall portion 21a of the box body 21, Side grooves 23b, 23c having a rectangular cross section through which the legs 12, 13 of the stay 10 are inserted are formed.

Thus, the headrest frame 20a
Is connected to the upper end connecting portion 1 of the stay 10 by the upper groove portion 23a.
3 is rotatably supported in the front-rear direction.
“a” is formed in a shape that applies a predetermined rotational frictional force to the upper end connecting portion 13. Further, the pivotal movement of the headrest frame 20a in the front-rear direction about the upper end connecting portion 13 of the stay 10 pivots along both legs 11, 12 of the stay 10, and the lateral groove of the headrest frame 20a. 23b and 23c are headrest frames 20
The stay 10a is formed in a shape that allows a predetermined amount of rotation in the front-rear direction about the upper end connecting portion 13 of the stay 10a.

In the headrest device H having such a configuration, the headrest body 20 is mounted on the top of the seat back C2 in the state shown in FIG. 1, and the occupant M on the seat cushion C1 supports the back on the seat back C2. When this is done, the head m can be supported by the headrest body H, and the headrest body H
While supporting, when a load more than a predetermined is applied,
The headrest main body H is slightly rotated rearward about the rotation center O as shown by a two-dot chain line in the figure, and supports the head m in this state.

As described above, in the headrest device H, the headrest frame 20a constituting the headrest body 20 is supported by the upper end connecting portion 13 of the stay 10 at the upper end, and the rotation center O of the headrest body 20 is adjusted. Is located at the upper end. For this reason, when the occupant M on the seat cushion C1 supports the head m on the headrest body, the head m is
The head m can be supported in a stable state because it hits a portion equivalent to or near the rotation center O of the head m.

In the headrest device H, the headrest frame 20a has a structure in which the upper portion of the stay 10 is built in, and does not protrude greatly in front of the stay 10, so that the thickness of the headrest pad 20b is sufficiently ensured. And the performance of the headrest body 20 can be improved.

Further, in the headrest device H, since the headrest frame 20a has a built-in upper portion of the stay 10 and has a structure in which rotation in the front-rear direction is not restricted by the headrest pad 20b, the headrest pad 20b is urethane. Even when the headrest frame 20a is foam-molded integrally with the headrest frame 20a, the rotation of the headrest body 20 in the front-rear direction is not restricted by the headrest pad 20b.

FIGS. 8 to 11 show another example of the headrest device according to the present invention. The headrest device has the same structure as the above-described headrest device H except for the configuration of the headrest frame 30. The same components, the same components are denoted by the same reference numerals, and similar components, Similar components will be described with similar reference numerals in the thirties.

The headrest device has a gate-shaped stay 1.
0 and the headrest body 30.
The stay 10 is formed by bending a rod, and is formed in a gate shape having both left and right legs 11, 12 and an upper end connecting portion 13 for connecting upper ends of the both legs 11, 12 to each other. The headrest main body 30 is composed of a headrest frame 30a and a headrest pad (not shown).
Is attached to the upper end connecting portion 13. The headrest pad not shown is similar to the headrest pad 20b.
Made of urethane foam, headrest frame 3
It is formed by foaming and molding urethane in an integrated state where Oa is attached to the stay 10.

The headrest frame 30a comprises a front box 31 made of synthetic resin and a rear lid 32 made of synthetic resin.
0a is the upper end connecting portion 1 of the stay 10 provided on the box body 31.
3 and an upper portion 3 of a fitting groove 32b for receiving an upper portion of the stay 10 provided on the lid 32.
The structure is the same except for the shape of 2b1, and a detailed description of the same structure is omitted.

The receiving portion 31 of the box 31
e, and the upper part 3 of the fitting groove 32b in the lid 32
2b1 is formed in a semi-elliptical cross section facing each other. When the lid 32 is assembled on the back side of the box 31, an upper groove 33a having an elliptical cross section extending in the front-rear direction is formed. The side grooves 33b and 33c formed at this time are
A side groove 23b in the headrest frame 20a,
It has the same cross-sectional shape as 23c.

In the headrest device having such a configuration, the head m can be supported by the headrest body 30 in the same manner as the headrest device H, and when a predetermined load or more is applied, the headrest body 30 is connected to the upper end of the stay 10. In the state of being received by the part 13, the whole slides rearward to support the head m in this sliding state.

As described above, this headrest device is different from the above-mentioned headrest device H in the shape of the upper groove 33a formed by the box 31 and the lid 32, and the headrest caused by the shape of the upper groove 33a. Although the difference is in the movement of the main body 30, the other configuration is the same and has the same operation and effect as the headrest device H.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle seat equipped with a first headrest device according to an example of the present invention.

FIG. 2 is a perspective view of the headrest device viewed from the rear side with a part thereof omitted;

FIG. 3 is a rear view of a headrest frame constituting the headrest device.

FIG. 4 is an exploded perspective view of the headrest frame and the stay.

FIG. 5 is a view of the headrest frame taken along line 5-5 in FIG. 3;
FIG. 3 is an end view cut along a line.

FIG. 6 is a sectional view of the headrest frame taken along line 6-6 in FIG. 3;
FIG. 3 is an end view cut along a line.

FIG. 7 is a sectional view of the headrest frame taken along line 6-6 in FIG. 3;
It is the end elevation cut | disconnected along the line.

FIG. 8 is an exploded perspective view of a headrest frame and a stay constituting a headrest device according to another example of the present invention.

FIG. 9 is a sectional end view of the headrest frame corresponding to FIG. 5;

FIG. 10 is a sectional end view of the headrest frame corresponding to FIG. 6;

FIG. 11 is a sectional end view of the headrest frame corresponding to FIG. 7;

FIG. 12 is a side view of a vehicle seat equipped with a conventional headrest device.

[Explanation of symbols]

C1: seat cushion, C2: bag, H: headrest device, O: center of rotation, M: seated person, m: head, 1
0: stay, 11, 12: leg, 13: upper end connecting part, 2
0, 30: Headrest body, 20a, 30a: Headrest frame, 20b: Headrest pad, 21,
31 box, 21a, 31a front wall, 21b, 31b
... Outer peripheral frame portion, 21c, 31c... Central frame portion, 21d, 31
d: Notch, 21e, 31e: Receiving part, 21f, 21
g, 31f, 31g: locking hole, 22, 32: lid, 22
a, 32a: front wall, 22b, 32b: fitting groove, 22b
1, 32b1 ... upper part, 22b2, 32b2 ... side part, 22
c, 22d, 32c, 32d ... locking claw, 23a, 33a
... Upper grooves, 23b, 23c, 33b, 33c.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidetoshi Nakane 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Co., Ltd. (72) Inventor Nobuhiko Takeda 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki F term in reference (reference) 3B084 DB09 DC01

Claims (6)

[Claims] A headrest frame rotatably supported in a front and rear direction by an upper end at a connecting portion connecting an upper end of left and right legs of the stay with a gate-shaped stay held at the top of a seat back. A headrest device including a headrest pad surrounding the headrest frame and forming a headrest body together with the headrest frame, wherein the headrest body is configured to be rotatable in a front-rear direction around a connecting portion of the stay as a rotation center. The headrest frame has a box-like shape, and has a substantially U-shaped fitting groove extending downward into which an upper part of the stay is fitted, and the fitting groove has a connecting part of the stay. The upper groove portion to be fitted and accommodated and the left and right legs of the stay extending downward continuously from the left and right ends of the upper groove portion are fitted. And a pair of left and right side grooves penetrating in a direction, and the upper groove is formed in a shape that gives a predetermined rotational frictional force to a connected portion of the stay that is housed, and each of the side grooves The headrest device is formed in a shape that allows a predetermined amount of rotation of the headrest frame in the front-rear direction around the connection portion of the stay. 2. The headrest device according to claim 1, wherein the stay is formed by bending a cylindrical rod into a substantially U-shape, and an upper groove of the headrest frame is a circle corresponding to a connecting portion of the stay. Formed in the cross section of the shape,
The headrest device is characterized in that each of the side grooves of the headrest frame has a rectangular cross section that allows the stay to rotate in the front-rear direction. 3. The headrest device according to claim 1, wherein the headrest frame comprises a front and rear box and a cover made of synthetic resin, and the box and the cover are fitted to each other from the front and back. A headrest device comprising a box-shaped frame. 4. A gate-shaped stay held at the top of the seat back, and a headrest frame supported at the upper end of the stay at the connecting portion connecting the upper ends of the left and right legs so as to be movable in the front-rear direction. A headrest device comprising a headrest pad surrounding the headrest frame and forming a headrest main body together with the headrest frame, wherein the headrest main body is configured to be movable in a front-rear direction around a connecting portion of the stay, The headrest frame has a box-like shape and includes a substantially U-shaped fitting groove extending downward to fit a portion above the stay therein, and the fitting groove is formed by fitting a connecting portion of the stay. The upper groove to be accommodated and the left and right legs of the stay are extended downward continuously from the left and right ends of the upper groove, and the lower part is fitted. It consists of a pair of left and right side grooves that penetrate, and the upper groove is formed in a shape that gives a predetermined sliding friction force between the stay and the connected portion of the stay that is housed, and each of the side grooves is A headrest device characterized in that it is formed in a shape that allows a predetermined amount of movement of a headrest frame in the front-rear direction. 5. The headrest device according to claim 4, wherein the stay is formed by bending a cylindrical rod into a substantially U-shape, and the upper groove portion and each side groove portion of the headrest frame are formed by the stay. A headrest device characterized in that it is formed in a rectangular shape that allows movement in the front-rear direction. 6. The headrest device according to claim 4, wherein the headrest frame comprises a front and rear box and a cover made of synthetic resin, and the box and the cover are fitted to each other from the front and back. A headrest device comprising a box-shaped frame.