JP2000287781A - Tiltable headrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compose a headrest of a small number of components, to easily set the headrest at a upright and a tilted positions and to firmly hold it at the upright position at least. SOLUTION: A plate 2 is protruded obliquely downward from the head of a stay 1 and a core body 3 embedded in the main body of headrest is linked to the plate 2 so as to be freely turned. The turning axis center of the core body 3 is positioned lower tan the head of the stay 1 and the head constitutes a stopper for regulating the turn of the core body 3. Thus the backward turn of the core body 3 is limited by the head of the stay 1 when the main body 4 of the headrest is in the upright position so that the main body 4 of the headrest can be stably held at the vertical position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest which can be held in an upright position in which the headrest is substantially upright at the upper end portion of the seat back, and a fall position in which the headrest falls down so as to be substantially horizontal rearward or forward. It relates to a folding device.

[0002]

2. Description of the Related Art A seat of an automobile is provided with a headrest in order to stably hold an occupant's head rear side and to reduce fatigue as much as possible. The headrest includes a substantially U-shaped stay inserted into the seat back so as to be adjustable in height, a cushion body provided to cover the stay, and a skin covering the cushion body. In recent years, a headrest which is held by a seat back so as to be able to swing back and forth so that a front and rear position with respect to a seat can be adjusted is also known.

[0003] By the way, in the conventional headrests, many are provided only in the driver's seat and the passenger's seat. However, in order to improve the safety and comfort of the occupant in the rear seat,
It is stated that it is preferable to provide a headrest also on the rear seat. But if there is no occupant in the backseat,
It is preferred that there is no headrest to ensure sufficient rear visibility.

There is also known a passenger car in which a wide space can be secured by tilting the rear seat forward, but if the rear seat is provided with a headrest, it interferes with the front seat when tilted forward. Often. To deal with this, the headrest of the rear seat is removed and then tilted forward, but there is a problem that the work of attaching and detaching the headrest is troublesome.

[0005] In order to solve such a problem, there has been known a retractable headrest which can be held at an upright position on a seat back and at a fall position which is swung rearward or forward. For example, there is a headrest whose angle can be adjusted as shown in FIGS. In this headrest, the head of the stay 100 is bent to form a convex portion 101, and a sheet metal core 200 is covered with the stay 1 so as to cover the convex portion 101.
00 is pivotably supported. The headrest body 300 is held so as to cover the core body 200.

In this headrest, the core body 200 rotates around the stay 100 with a predetermined frictional resistance, and the movement of the rotation is restricted by the protrusions 101 abutting on the inner walls in front and behind the core body 200. . That is, with the stay 100 fixed to the upper part of the seat back, the headrest body 30
In the range of 0, the angle around the head of the stay 100 can be adjusted by swinging around the head of the stay 100 within an angle range in which the convex portion 101 comes into contact with the inner walls before and after the core 200. Therefore, by adjusting the shapes of the inner walls before and after the core body 200, it is possible to obtain a retractable headrest that can be held at the upright position on the seat back and the overturned position swung rearward or forward. it can.

Japanese Patent Application Laid-Open No. H5-239035 discloses a headrest composed of a pair of front and rear blocks.
There is disclosed a headrest device in which a pair of block bodies can be rotated by interposing a link mechanism therebetween. According to this headrest device, the standing / falling operation of the headrest can be performed only by pressing one of the blocks.

Japanese Patent Application Laid-Open No. 6-38854 discloses a link mechanism including a rotatable overturning plate, a rotatable link plate, and a movable plate, and the headrest is rotated by rotating the link plate with a motor. A retractable headrest device capable of standing up and falling down is disclosed. Further, JP-A-6-62933 discloses that the headrest has an upper and lower two-part structure including an upper member and a lower member.
By connecting the upper member and the lower member with a link mechanism,
There is disclosed a retractable headrest device in which an upper member can be raised and fallen with respect to a lower member.

[0009]

However, in the retractable headrest device disclosed in the above-mentioned publication, a lock mechanism for locking at the standing / falling position is required as a separate member or a motor is required. Or
There is a problem that the number of parts is large. In the angle-adjustable headrest as shown in FIGS. 5 to 7, the frictional resistance between the core 200 and the stay 100 is increased in order to stably support the human head in the standing position shown in FIG. Need to do so, making angle adjustment difficult. Conversely, if the frictional resistance is reduced, the angle adjustment becomes easy, but it is easily inclined to the state shown in FIG. 7, so that it becomes difficult to stably support the human head in the standing position shown in FIG. .

Further, in order for the headrest body 300 to be in a substantially horizontal overturning position, the angle between the inner walls of the core body 200 before and after the core body 200 needs to be substantially a right angle. That is, it is necessary to make the shape of the space inside the core body 200 large in the front-rear direction in order to allow the rotation of the convex portion 101, and if so, a problem may occur in the design surface of the headrest main body 300.

Further, since the core body 200 needs the front and rear inner walls for contacting the convex portion 101, a perforated headrest having a through hole 301 penetrating through the center of the headrest body 300 as shown in FIG. Is often difficult to apply, and there is a problem that the degree of freedom in design is small. Note that the interval between the pair of legs of the stay needs to match the interval between the pair of insertion holes provided in the upper portion of the seat back. Therefore, when the distance between the legs of the stay is narrow in the conventional perforated headrest, as shown in FIG. 8, the stay 100 is not used as the core but is extended and used in the design of the headrest body 300 at present. is there. However, in this case, since a special stay is used, the stay cannot be shared with a headrest having no ordinary through-hole, and there is a problem that the number of parts increases.

The present invention has been made in view of such circumstances, and is configured with a small number of parts, can be easily set in the standing position and the falling position, and can be securely held at least in the standing position. The purpose is to be able to.

[0013]

A feature of the retractable headrest according to the present invention is that a substantially U-shaped stay comprising a head and a pair of legs extending from both ends of the head. , A holding member protruding from the head, a core body rotatably held by the holding member, and a headrest body in which the core body is embedded, the center of the rotation axis of the core body being below the head. Position, the head constitutes a stopper that regulates the rotation of the core body, and the headrest body is in an upright position in which the headrest body stands in a state where the rotation of the core body to the rear is regulated by the head, and the core body is moved forward. The headrest body is configured to be in a fallover position where the headrest body has fallen down in a state where the headrest body has been rotated and the regulation by the head is released.

The feature of the retractable headrest according to the second aspect is that in the retractable headrest according to the first aspect, the core body has a frame shape, and the headrest body penetrates a portion surrounded by the core body. Having holes.

[0015]

According to the first aspect of the present invention, in the upright position of the headrest body using the headrest body, the core body abuts the head of the stay, When the foam constituting the main body abuts on the head of the stay via the core, the rotation of the core and the headrest main body rearward is restricted. Therefore, it is possible to stably support the back side of the occupant's head,
Used as a normal headrest.

Since the center of the rotating shaft of the core is located below the head of the stay, the center of the rotating shaft and the point of action where the core abuts the head directly or via a foam. The effect on the shape of the headrest body is small even if the distance of the headrest is increased. Therefore, without changing the design, the distance between the rotation axis center and the action point can be increased, and the human head can be supported more stably.

It is preferable that the pair of legs of the stay each have a bent portion bent at a substantially right angle at the tip, and the head is formed in a straight line connecting the tips of the pair of bent portions. By doing so, it is easy to maintain the state where the head is stored in the headrest main body even when it is in the fall position,
The distance between the center of the rotating shaft and the above-mentioned action point can be further increased without changing the design.

When the headrest is set to the falling position, the headrest body is pressed by a hand or the like so as to rotate forward. Then, the core body rotates together with the headrest main body, and the headrest main body is in a fall position in which it has fallen forward. At this time, the core may be rotatable with respect to the holding member, and may be in a state of being hung down by its own weight of the headrest body and the core. . Therefore, it is desirable that at least one of the core member and the holding member has a locking portion for restricting the rotation of the core member in the overturned position. Thereby, the headrest main body can be stably held at the overturned position. Further, if a configuration is adopted in which a frictional force acts on the rotation, the rotation can be more stably held at the standing position and the falling position.

In order to return the headrest body from the overturned position to the upright position, the headrest body is rotated by hand or the like so as to be lifted. Then, the core rotates together with the headrest main body, and the core abuts on the head of the stay, or the foam constituting the headrest main body abuts on the head of the stay via the core, thereby forming the core. And the upright position where the rotation of the headrest body is restricted.

The headrest body and the stay can be the same as those conventionally used. The headrest body is generally composed of a foam and a skin, and the foam is integrated with the core. The holding member may be formed by caulking a separately formed member on the head of the stay and fixing it by welding or the like, or may be formed by bending the head of the stay and integrally forming the stay. It is desirable that the direction in which the holding member protrudes from the head of the stay is obliquely downward, and the core body is rotatably held at the tip.

The shape of the core is not particularly limited as long as it is rotatably held by the holding member. For example, if the core material is formed in a frame shape, the headrest main body can be a perforated headrest having a through hole in a portion surrounded by the core body. As a result, the design is improved, and a certain degree of visibility can be ensured without having to fall down. If the core is formed separately, the stay can be the same as that of the related art, which is more preferable.

[0022]

The present invention will be described below in detail with reference to examples. (Embodiment 1) FIGS. 1 to 3 show a retractable headrest of this embodiment. The headrest includes a stay 1, a plate 2 fixed to the stay 1, a core 3 rotatably held by the plate 2, and a headrest body 4 fixed to the core 3.

The stay 1 has a linear head 10 and a head 1
0 and a pair of legs 11 extending in parallel from both ends, and has a substantially U-shape, and is formed of a metal pipe. The plate 2 is made of a metal plate, and has one end fixed to the head 10 of the stay 1 by caulking and welding. And plate 2
The other end extends obliquely downward and forward from the head 10 as shown in FIGS. 2 and 3, and at the other end, a frame-shaped core body 3 is rotatably supported with a predetermined frictional resistance.

The core 3 is integrally connected to the headrest body 4 and is embedded in the headrest body 4. The headrest body 4 is composed of a urethane foam (not shown) and a skin covering the urethane foam. In the retractable headrest of the present embodiment, the stay 1, the plate 2, the core body 3, and the bag-shaped skin are joined in a foaming mold, and the headrest body 4 is integrally foamed. It was manufactured by molding.

Now, with the retractable headrest of this embodiment,
In the standing position shown in FIG. 1 and FIG. 2, the core body 3 abuts on the head 10 of the stay 1, so that further rotation of the head is restricted. Can be received at stay 1. Therefore, the human head can be stably supported. When the headrest main body 4 is set to the falling position, the headrest main body 4 is pressed forward as indicated by an arrow in FIG. Then, the core 3 rotates about one end of the plate 2 which is a pivot. One end of plate 2 and core 3
A locking portion (not shown) is formed in the pivot portion of the
Further rotation is restricted at a position where is substantially horizontal. Therefore, the rotation of the core body 3 and the headrest main body 4 is restricted at the overturned position shown in FIG. 3, and is held in that state. In this overturned position, the height of the headrest main body 4 is lower than when it is in the upright position, so that the field of view is secured.

To return the headrest main body 4 to the upright position, the headrest main body 4 is pivoted rearward as indicated by an arrow in FIG. Then, the backward rotation is restricted at the position where the core body 3 abuts on the head 10 of the stay 1, and at that time the headrest main body 4 becomes the upright position shown in FIG. Therefore, according to the retractable headrest of this embodiment, the headrest main body 6 can be stably held at the standing position and the falling position. Also, since the number of parts is small and the cost is low, the plate 2 supporting the core 3 can be fixed to the head 10 of the conventional stay 1 and manufactured.
A conventional stay can be used as it is.

(Embodiment 2) The retractable headrest of this embodiment shown in FIG.
0, and the configuration is the same as that of the first embodiment, except that the core 3 has a larger frame shape extending in the left-right direction than the first embodiment. The through hole 40 penetrates the core body 3 and the headrest main body 4.

That is, the tiltable headrest of the present embodiment can be stably held at the standing position and the falling position, as in the first embodiment. Further, since the shape of the plate 2 is small, the plate 2 can be disposed in the headrest main body 4 below the through hole 40, and the through hole 40 can be formed because the core body 3 is frame-shaped. Therefore, according to the retractable headrest of the present embodiment, it is possible to set the standing position and the falling position with the perforated headrest. Further, since it is not necessary to expand the stay as in the related art, the stay can be shared with the ordinary headrest without holes, so that the number of parts can be reduced and the cost can be reduced.

[0029]

According to the retractable headrest of the present invention, the headrest body can be easily set in the upright position and the overturned position with a simple structure, and can be securely held at least in the upright position. Therefore, it is inexpensive, has high operation accuracy, and is excellent in use feeling.

[Brief description of the drawings]

FIG. 1 is a front view showing a headrest main body of a retractable headrest according to an embodiment of the present invention in a see-through manner.

FIG. 2 is a cross-sectional view showing a structure of a retractable headrest according to an embodiment of the present invention at an upright position through a headrest main body.

FIG. 3 is a cross-sectional view showing the structure of the tiltable headrest according to one embodiment of the present invention at a falling position through the headrest body.

FIG. 4 is a sectional view of a retractable headrest according to a second embodiment of the present invention at an upright position.

FIG. 5 is a front view showing a headrest body of a conventional angle-adjustable headrest in a see-through manner.

FIG. 6 is a cross-sectional view showing the structure of a conventional angle-adjustable headrest in an upright position through a headrest body.

FIG. 7 is a cross-sectional view showing a structure in a state where a conventional angle-adjustable headrest is tilted through a headrest body.

FIG. 8 is a front view showing a headrest body of a conventional perforated headrest in a see-through manner.

[Explanation of symbols]

1: Stay 2: Plate (holding member)
3: Core 4: Headrest body 10: Head
11: Leg 40: Through hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Zhen Yamauchi 39, Motomachi, Komaki City, Aichi Prefecture Fuji Seiki In-flight F-term (Reference) 3B084 DB09 DB13 3B087 DC08 DC09

Claims (2)

[Claims] 1. A substantially U-shaped stay comprising a head and a pair of legs extending from both ends of the head, a holding member protruding from the head, and rotatably held by the holding member. And a headrest body in which the core is buried, wherein the center of the rotation axis of the core is located below the head, and the head regulates the rotation of the core. A stopper is formed, and the headrest body is in an upright position where the headrest body is erected in a state where the rotation of the core body backward is restricted by the head, and the core body is rotated forward and the restriction by the head is released. A headrest body that is configured to be in a fallover position where the headrest body falls down in a state where the headrest is folded down. 2. The retractable headrest according to claim 1, wherein the core has a frame shape, and the headrest body has a through hole in a portion surrounded by the core.