JPH0612700Y2 - Headrest device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a headrest device provided in a vehicle seat or the like.

[Conventional technology]

In a headrest device provided in a vehicle seat or the like, particularly a headrest device provided in a rear seat of a vehicle, the headrest body is tilted forward to be in a retracted state in order to secure a rear view of a driver when the vehicle is backed. Such a so-called retractable headrest has been proposed and implemented.

As a conventional headrest device of this type, for example, there is "Practical application No. 63-41801" previously proposed by the present applicant.

This conventional headrest device will be described with reference to FIGS. 4 to 8. In the drawings, (1) is a seat back of a rear seat RS of an automobile, and a headrest main body (2) is provided above the seat back (1). ) Is provided, and the headrest main body (2) is structured to be tilted forward by the rotation moving mechanism. That is, (3) is a stay that supports the headrest body (2), the upper end of the stay (3) is fixed to a headrest frame (not shown) arranged in the headrest body (2), while the lower end is Seat back (1)
It is fixed to the inner drive shaft (4). The drive shaft (4) is horizontally rotatably supported by a bracket (5) fixed to a fixed portion (for example, a seat back frame) in the seat back (1), and has a motor at one end thereof. (6) is linked.

The stay (3) is projected above the seat back (1) through a slotted cutout (7) provided in the seat back skin. The motor (6) is driven by operating an operation switch (8) provided in the cockpit of the driver's seat.

When the vehicle is backing up, the operation switch (8) is operated to drive the motor (6) to rotate the drive shaft (4), so that the stay (3) rotates forward around the drive shaft (4). As a result, the headrest main body (2) is rotationally moved (tilted) forward and brought into the forwardly stored state (see FIG. 6). For this reason, the headrest body (2) has a front seat, that is, a driver's seat DS.
The vehicle is positioned below the rear field of view of the driver seated on the vehicle, which ensures a sufficient rear field of view of the driver.

[Problems to be solved by the device]

However, such a conventional headrest device,
Since the headrest body (2) is tilted by a simple rotational movement, as shown in FIG. 8, the headrest body (2) rubs against the upper part of the seat back (1) during the headrest tilting operation, and the headrest is tilted forward. In the retracted state, the headrest body (2) interferes with the front surface of the seat back (1), which causes so-called threads and wrinkles on the seat back skin, which greatly impairs the appearance quality.

The present invention has been made in view of the above problems, and an object thereof is to eliminate the above-mentioned problems by introducing a new mechanism into the rotational movement mechanism of the headrest.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a headrest device in which a headrest main body provided on an upper part of a seatback is tilted forward by a rotational movement mechanism to be in a retracted state. A bracket fixed to the inside, a headrest main body, and two front and rear stays that connect the bracket and the headrest main body constitute a four-joint link mechanism, and a first rear portion that constitutes this four-joint link mechanism. The stay is formed to be longer than the second stay in front.

[Action]

In such a headrest device of the present invention, the headrest body is tilted by the operation of the four-bar linkage, and at this time, the first stay forming the four-bar linkage is formed longer than the second stay, so that the headrest is formed. The main body is tilted without rubbing against the upper part of the seat back, and the headrest main body does not interfere with the front surface of the seat back when the headrest is stored forward.

〔Example〕

In the following, an embodiment of the present invention will be described with reference to FIGS. 1 to 3, parts corresponding to those in the conventional example shown in FIGS. 4 to 8 will be designated by the same reference numerals, and description thereof will be omitted. To do.

The headrest device of the present invention employs a four-bar linkage mechanism as a rotational movement mechanism of the headrest body (2). That is, in this example, stays for supporting the headrest body (2) are provided at the front and rear, that is, the first stay (9).
And the second stay (1
0) are arranged in parallel, the upper end of the first stay (9) is pivotally attached to the headrest body (2) by a shaft pin (11),
The lower end is fixed to the drive shaft (4). On the other hand, the second stay
The upper end of (10) is pivotally attached to the headrest body (2) by a shaft pin (12) above the first stay (9), and the lower end is freely rotatable on the bracket (5) above the drive shaft (4). It is fixed to the rotating shaft (13) which is pivotally supported by. The upper ends of the first and second stays (9) and (10) are pivotally attached to a fixed portion in the headrest body (2), for example, a headrest frame arranged in the headrest body.

Of the front and rear links, the rear first link (9) is formed in an inverted V shape so as to prevent the headrest body (2) from intersecting with the second link (10) when tilted forward. In addition, the effective length thereof is slightly longer than that of the second link (10).

The headrest device of this example having the above-described configuration
Stay (9), headrest body (2), and second stay
(10) and the bracket (5) constitute a four-bar link mechanism L, and the headrest body (2) and the seat back (1) are connected via the four-bar link mechanism L. .

Then, when the drive shaft (4) is rotated by driving the motor from the state in which the headrest body (2) is in the normal position (Fig. 1), the four-bar linkage L operates, that is, the drive shaft.
By the rotation of (4), the first stay (9) is rotated forward around the drive shaft (4), and the second stay is integrated with this.
(10) is rotated forward around the rotation axis (13). At this time, since the first stay (9) is longer than the second stay (10), the headrest body (2) is rotationally moved (tilted) forward while drawing a locus as shown in FIG. 3, that is, the headrest. The body (2) rotates and moves away from the upper part of the seat back (1), and the seat back (1) is in the forward tilted position.
The storage state is reached without touching the front surface of the (see FIG. 2).

Therefore, the headrest body (2) does not rub against the upper part of the seatback (1) when the headrest tilts, and the headrest body (2) does not interfere with the front surface of the seatback (1) when the headrest is tilted forward. Since it is not present, no scratches or wrinkles will occur on the seat back skin.

Further, in particular, in this example, the first stay (9) is bent so as not to intersect with the second stay (10), so that the first stay (9) and the second stay (9) Since 10) and 10) can be arranged side by side in the rotation direction, the width of the notch (7) of the seat back skin through which both the stays (9) and (10) pass may be formed to be a small width for one stay, That is, since the width of the notch (7) can be minimized, the appearance of the seat back (1) does not deteriorate.

Although the embodiment in which the headrest device of the present invention is applied to the rear seat of the automobile has been described above, the present invention is not limited to the rear seat of the automobile, and may be provided in the front seat, that is, the driver's seat, and other than the automobile. It is also widely applicable to various vehicles. Further, the configuration of each part including the link mechanism is not limited to that shown in the present embodiment, and various changes and modifications are possible, and it goes without saying that the present embodiment does not specify the present invention.

[Effect of device]

As described above, the headrest device of the present invention uses the four-bar linkage as the rotational movement mechanism of the headrest main body, and the rear first stay forming the four-bar linkage is formed longer than the front second stay. This makes it possible to move the headrest body that cannot be obtained by conventional simple rotational movement, so that the headrest body does not rub against the upper part of the seatback when tilting the headrest, and the headrest body does not rub against the seatback when tilted forward. Since it does not interfere with the front surface of the seat back, it is possible to prevent the occurrence of scratches and wrinkles on the seat back skin, and to maintain a good appearance quality.

[Brief description of drawings]

FIG. 1 is a side view showing the structure of a headrest device of the present invention, FIG. 2 is a side view of the headrest device in a retracted and retracted state, FIG. 3 is a diagram showing the movement trajectory of the headrest device of the present invention, and FIG. The figure which shows the application example of a foldable headrest device, FIG. 5 is a side view which shows the structure of the conventional headrest device, FIG. FIGS. 8A and 8B are diagrams showing the movement locus of the conventional headrest device. In the figure, (1) is the seat back, (2) is the headrest body,
(9) is a first stay, (10) is a second stay, and L is a four-bar linkage mechanism.

Claims (1)

[Scope of utility model registration request] 1. A headrest device in which a headrest main body provided on an upper part of a seatback is tilted forward by a rotational movement mechanism to be in a retracted state, and a bracket fixed in the seatback is used as the rotational movement mechanism. The headrest body and the front and rear stays that connect the bracket and the headrest body together form a four-joint link mechanism, and the rear first stay that constitutes the four-joint link mechanism is connected to the front second stay. A headrest device characterized in that the headrest body is formed longer than the stay and does not interfere with the seat back when the headrest body tilts.