JPH066759Y2 - Headrest device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a headrest device in which a stay is extended upward from an upper end portion of a seat back and a headrest main body is supported on the stay so that the headrest body can be adjusted in the vertical position and the front-back position. Regarding

[Prior Art] Conventionally, as a headrest device of this type, a drive unit for adjusting a vertical position for adjusting a vertical position of a headrest body is internally provided in a seat back, and an output end of the drive unit for adjusting the vertical position and a headrest. It is common that a stay extending downward from the main body is connected via a connecting bracket.

[Problems to be solved by the invention] However, in such a conventional headrest device, when assembling the seatback, the stay and the headrest main body that are previously attached to the seatback become an obstacle,
There is a problem that it is difficult to assemble, the assembly work is troublesome, and the cost increases.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a headrest device capable of improving the assembling property and reducing the cost.

[Means for Solving the Problems] The gist of the present invention for achieving such an object is to extend a stay upward from an upper end portion of a seat back, and to adjust the vertical position of a headrest main body to the stay, and a front and rear position. In the headrest device that is adjustable, the stay includes an outer stay that is vertically movable on a seat back, and an inner stay that is fitted in the outer stay and is vertically movable relative to the outer stay. And a base end portion of the headrest main body is pivotally supported on the outer stay side so as to be swingable between an upright position and a forward tilted position, and when the inner stay moves up and down relatively, The tip of the headrest body is connected to the inner stay so that it can be swung around the center, and the output end of the headrest body is adjusted to the seat back to adjust its vertical position. A drive mechanism for adjusting the vertical position, which is vertically movable, and a drive mechanism for adjusting the front-rear position, whose output end can be moved vertically to adjust the front-rear position of the headrest body, are provided. A fitting member into which the outer stay is fitted so as to be inserted from above is fixedly provided at the output end of the fitting, and the fitting member and the outer stay are connected to each other by a stop ring member so as not to move up and down relatively, The headrest device is characterized in that the output end of the drive mechanism for adjusting the front-rear position and the inner stay are screwed by a screw member so as not to move vertically.

[Operation] Inside the seat back, a drive mechanism for adjusting the vertical position and a drive mechanism for adjusting the front-rear position are arranged. In addition, the stay extends downward from the headrest body.

When assembling the headrest body to the seat back,
Insert the stay into the seat back from above.

As a result, the outer stay fits into the fitting member provided at the output end of the drive mechanism for adjusting the vertical position, and the inner stay approaches the output end of the drive mechanism for adjusting the front-rear position.

Next, the outer stay and the fitting member are connected to each other by a stop ring member so that they cannot move up and down relatively, and the inner stay and the drive mechanism for adjusting the front-rear position are screwed so that they cannot move up and down relatively.

In the headrest device assembled as described above,
When the drive mechanism for adjusting the vertical position is driven, the outer stay moves up and down through the fitting member, the inner stay moves up and down integrally with the outer stay, and the headrest body is adjusted in the vertical position.

When the drive mechanism for adjusting the front-rear position is driven, the inner stay moves up and down with respect to the outer stay, whereby the headrest body swings between the upright position and the forward leaning position around the base end, and the headrest body moves. Is adjusted back and forth.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention.

As shown in FIG. 1, a headrest body 30 is attached to the seat back 10 via a pair of stays 20. The headrest body 30 is composed of a tubular body member 31 and both side members 32 screwed to both ends of the body member 31.

The stay 20 includes pipe-shaped outer stays 21 and 21 arranged on both inner sides of the seat back 10, and a pair of inner stays 2 that are fitted in the outer stays 21 and are vertically movable relative to each other.
2 and. The outer stay 21 is supported by a guide portion (not shown) so as to be vertically movable.

Inside the seat back 10, a drive mechanism 50 for adjusting the vertical position of the headrest body 30 is adjusted.
And a drive mechanism 60 for adjusting the front-rear position for adjusting the headrest body 30 in the front-rear position.

The drive mechanism 50 for adjusting the vertical position has a drive motor 51 fixed to the seat back 10 as a power source, and a gear box 53 that changes the rotational movement of the drive motor 51 into the vertical movement of the screw member 52. Have.

A block member 54 is fixed to the upper end of the screw member 52, and the block member 54 is fixed to a support plate 56 extending from an inverted U-shaped frame 55. The outer stay 21 is attached to both lower end portions 55a of the inverted U-shaped frame 55.
A tubular fitting member 57 for externally fitting is fixedly installed.

As shown in FIGS. 1 and 2, circumferential grooves 21a, 21a are formed on the outer peripheral wall of the outer stay 21 so as to be spaced apart from each other by the vertical width of the fitting member 57. .
An E-ring member 70 is fitted in each circumferential groove 21a such that the outer stay 21 and the fitting member 57 are relatively immovable in the vertical direction. Here, the E ring member 70 is fitted from behind the seat back 10.

The drive mechanism 60 for adjusting the front-rear position includes a drive motor 61 as a power source, and the drive motor 61 is fixed to a support bracket 56 a extending from the inverted U-shaped frame 55.

Rotational movement of the drive motor 61 is controlled by the screw member 62.
Is provided with a gear box 63 that changes the vertical movement of the
Is consolidated. Rod members 65 extend from the block member 64 in both lateral directions.

As shown in FIGS. 1 and 3, an output bracket 67 that is movable in the up-down direction in conjunction with the screw member 62 is fixedly provided at the tip end portion 65 a of the rod member 65.

An insertion hole 68 is formed in the bottom surface portion 67a of the output bracket 67. A female screw portion 2 in which a bolt member 75 passing through the insertion hole 68 is threaded on the lower end portion of the inner stay 22 so that the output bracket 67 and the inner stay 22 cannot be moved up and down relatively.
It is screwed to 2a.

As shown in FIG. 4, a male screw portion 22 b may be threaded on the lower end portion of the inner stay 22, and the nut member 76 may be screwed onto the male screw portion 22 b passed through the insertion hole 68.

As shown in FIG. 1, a support bracket 23 extends forward from each upper end portion of the outer stay 21, and a pivotal support member 24 is installed on each support bracket 23. Both end flanges 25 of the pivot member 24 are formed along the inner surfaces of the both side members 32 of the headrest body 30, and the base ends of the both side members 32 of the headrest body 30 are attached to the both end flanges 25 by the pin members 34 so as to be in an upright position and forward. It is pivotally supported in a position and in a swingable manner.

Connection brackets 27 are fixed to both ends of the substantially horizontal portion 26, which is the head of the inner stay 22, via plate members 27a. The connecting bracket 27 is formed along the inner surfaces of the side members 32 of the headrest body 30. A link member 28 is provided at the tip of the connecting bracket 27.
Is rotatably connected by a pin member 29, and a tip end portion of the link member 28 is rotatably connected by a pin member 29a to tip ends of both side members 32 of the headrest body 30.

Next, the operation will be described.

Inside the seat back 10, a drive mechanism 50 for adjusting the vertical position and a drive mechanism 60 for adjusting the front-back position are arranged. The stay 20 extends downward from the headrest body 30.

When the headrest body 30 is assembled to the seat back 30, the stay 20 is inserted into the seat back 10 from above.

As a result, the outer stay 21 is fitted into the fitting member 57 of the drive mechanism 50 for adjusting the vertical position, and the inner stay 21 is
Is an output bracket 67 of the drive mechanism 60 for adjusting the front-rear position.
Come into contact with.

Next, the circumferential groove 21a of the outer stay 21 is positioned at the upper end and the lower end of the fitting member 57, and the E ring member 70 is fitted into the circumferential groove 21a from the rear of the seat back 10. As a result, the outer stay 21 becomes vertically movable integrally with the fitting member 57.

Next, the female screw portion 22a of the inner stay 22 and the insertion hole 67a of the output bracket 67 are aligned, and the bolt member 75 inserted from the rear of the seat back 10 is screwed into the female screw portion 22a through the insertion hole 67a. As a result, the inner stay 22 and the output bracket 67 can be integrally moved up and down.

The position of the assembled headrest body 30 can be adjusted to a desired vertical position by rotating the drive motor 51 in a predetermined direction.

As a result, the screw member 52 rotates, the screw member 52 moves in the vertical direction via the gear box 53, and the inverted U-shaped frame 5 is integrated with the screw member 52.
5 moves up and down. As a result, the outer stay 21 moves up and down together with the inner stay 22 via the fitting member 57.

As a result, the pivot member 24 on the outer stay 21 side and the link member 28 on the inner stay 22 side move in the vertical direction without relatively moving. As a result, the headrest body 30 connected to both members moves in the vertical direction while maintaining the initial inclination angle.

When the headrest main body 30 moves to a desired vertical position, the drive motor 51 is stopped, the outer stay 21 and the inner stay 22 are also stopped, and the drive mechanism 50 for adjusting the vertical position.
And, it is supported at that position by a drive mechanism 60 for adjusting the front-back position. As a result, the headrest body 30 is supported at the desired vertical position via the stay 20.

In order to adjust the position of the headrest body 30 to a desired front-back position, the drive motor 51 is stopped and the drive motor 61 is moved.
Only one needs to be rotated in a predetermined direction. As a result, only the inner stay 22 moves in the vertical direction via the gear box 63, the screw member 62, the rod member 65, and the output bracket 67.

When the inner stay 22 moves in the vertical direction, the connecting bracket 27 moves in the vertical direction integrally with the inner stay 22. As a result, the headrest body 3 is inserted through the link member 28.
The front ends of the side members 32 of 0 are displaced in the vertical direction, and the headrest body 30 swings around the base ends of the side members 32.

If the drive motor 61 is stopped when the headrest body 30 reaches the desired front-rear position, the headrest body 30 is held at the desired front-rear position via the outer stay 21 and the inner stay 22.

The drive motors 51 and 61 may be rotated in parallel to adjust the vertical position and front-back position of the headrest body 30 at the same time.

Although the outer stay 21 and the fitting member 57 are immovably connected to each other using the E-ring member 70 in the above-described embodiment, the invention is not limited to this, and a stop ring member such as an O-ring member may be used. .

Further, although the E-ring members 70 are used at two places, only one step is required if the outer stay 21 is provided with a step portion in which the fitting member 57 cannot move relatively upward. A slit is formed in an intermediate portion in the vertical direction of the slit, and the slit and the circumferential groove 21a of the outer stay 21 are aligned with each other.
A and E may be stopped by one E ring member 70.

[Advantage of Invention] According to the headrest device of the present invention, after assembling the seat back once, the stay extending from the headrest main body is inserted into the seat back from above to adjust the vertical position previously installed. The fitting member of the drive mechanism and the outer stay of the stay are connected to each other by a stop ring member so as not to move vertically, and the output end of the drive mechanism for adjusting the front-rear position and the inner stay of the stay, which are also installed in advance, are connected. Since I also screwed it so that it could not move up and down,
It is possible to assemble the stay, headrest body, etc. without obstruction, the work of assembling the seat back is simplified, the total number of assembling steps is reduced, and the cost can be reduced.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of a headrest device, FIG. 2 is an exploded perspective view showing a connection relationship between an outer stay and a fitting member, FIG. 3 is an exploded perspective view showing a connecting portion of the inner stay, and FIG. 4 shows a modified example, and is an exploded perspective view showing a connecting portion of the inner stay. 10 ... Seat back 20 ... Stay 21 ... Outer stay 22 ... Inner stay 30 ... Headrest main body 50 ... Upward / downward adjustment drive mechanism 57 ... Fitting member 60 ... Front / rear direction adjustment drive mechanism 67 ... Output bracket (output end) 70 ... E-ring member (stop ring member) 75 ... Bolt member

Claims (1)

[Scope of utility model registration request] 1. A headrest device in which a stay is extended upward from an upper end portion of a seat back, and a headrest main body is supported by the stay so that the headrest main body can be adjusted in the vertical position and the longitudinal position, the stay being movable in the seatback in the vertical direction. An outer stay to be mounted and an inner stay that fits in the outer stay and can move up and down relative to the outer stay. The base end of the headrest main body is tilted forward with respect to the outer stay. The headrest body is swingably pivoted to a position, and the tip portion of the headrest body is connected to the inner stay so that the headrest body swings around the base end portion when the inner stay moves up and down relatively. Then, in order to adjust the vertical position of the headrest body to the seat back, the drive mechanism for vertical position adjustment whose output end can be moved up and down and the headrest body position adjustment. In order to achieve this, a drive mechanism for adjusting the front-rear position whose output end is vertically movable is installed, and a fitting member for inserting the outer stay into the output end of the drive mechanism for adjusting the vertical position so that the outer stay can be inserted from above. While being fixed, the fitting member and the outer stay are connected to each other by a stop ring member so that they cannot move vertically, and the output end of the drive mechanism for adjusting the front-rear position and the inner stay are relatively fixed. A headrest device, wherein the headrest device is screwed by a screw member so as not to move up and down.