JPH0529653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a headrest structure that is vertically movably supported by the left and right stay portions of a headrest stay erected at the upper end of a seat bag.

[Conventional technology]

Generally, in a vehicle seat or the like, a headrest that supports the head of a seated person from the back side is provided at the upper end of the seat back so as to be movable up and down via a headrest stay. By the way, in conventional headrests of this kind, the left and right stays of the headrest stays, which are provided hanging down from the main body, are made of resin, which is attached to the seatback frame or the like via a holder bracket on the upper end side of the seatback. It is supported so that it can move up and down by inserting and holding it in the stay holder side made of aluminum, and the height position in the vertical direction can be adjusted by inserting and removing these left and right stays. It was common to have a structure that could be locked and fixed at an appropriate position using a locking mechanism such as a locking pawl.

[The problem that the idea attempts to solve]

However, according to the conventional head rest structure described above, the left and right stay parts of the head rest stay are inserted and held in the stay holder provided on the seat back side, and the corresponding stay parts are cut only on one of the holder sides. The structure is such that the cutout grooves, etc. that have been formed are locked with locking claws, etc., and the structure of each part including the locking mechanism is complicated, which not only leads to high costs, but also has a stepped locking structure, making it difficult to make fine adjustments. The headrest stay, which is inserted into the seat bag, has problems in terms of handling.

In particular, the left and right stay sections of the headrest stay are inserted diagonally into the upper end of the seat back from the front of the seat, and the length of these stay sections must be commensurate with the amount of vertical adjustment of the headrest. In order to protect the tips of these stays, it is necessary to provide a certain degree of thickness to the back side of the upper end of the seat back. Therefore, it is not possible to make the upper end of this seat bag thinner.
For example, this has become a problem from a practical standpoint in front seats. In addition, in the case of trunk-through type or hatchback type rear seats, a panel is often used for the rear back frame, and it is desired that the entire seat back be made thin, so the above-mentioned vertically movable headrest is adopted. In this case, a problem arises in that the amount of insertion of the left and right stay portions, that is, the amount of vertical adjustment of the headrest cannot be secured.

Recently, there has been a demand for thinner seat backs for both front seats and rear seats, and in addition to simplifying the above-mentioned configuration, some measures are being taken to address the problems caused by headrest stays when vertically adjusting the headrest. That is what is needed. Furthermore, in the conventional structure described above, when adjusting the height position of the headrest by moving it up and down, the headrest side is moved up and down while adjusting the locking mechanism attached to the stay holder on the seat back side. This requires a troublesome operation, which poses a problem from the aspect of adjustment operability, and it is desired that consideration be given to this point.

In particular, it has recently become desirable to have a configuration in which this type of headrest vertical movement operation can be automated using an electric motor or the like, and it is necessary to take such points into consideration.

[Means to solve the problem]

In order to meet such demands, the headrest structure according to the present invention has a headrest stay that has left and right stays that are fixed and erected on the upper end of the seat bag, and that can move up and down with respect to the left and right stays. a headrest frame constituting a headrest body supported by the headrest body, the left and right stay portions having threaded portions formed at outer peripheral portions facing inside the headrest body, and an inner peripheral screw threadedly engaged with these threaded portions. A gear member having a section is screwed onto each stay part while being held in a gear box attached to the headrest frame side, and each gear member is movably adjusted in the vertical direction of the headrest main body. It is configured to rotate in synchronization with each other.

[Effect]

According to the present invention, when adjusting the movement of the headrest main body in the vertical direction, it has an internal threaded part that is automatically engaged with the threaded parts of the left and right stay parts manually or by an electric motor, etc., and is held on the headrest frame side. By rotating a gear member provided in a gear box, the headrest main body can be moved up and down, and the headrest main body can be positioned and held at a desired position.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

1 and 2 show an embodiment of the headrest structure according to the present invention, and in these figures, the headrest main body, which is designated as a whole by the reference numeral 1, is the seat back 2, as is clear from FIG.
A headrest stay 3 having a substantially downward U-shape whose lower end is fixedly erected relative to the upper end is supported so as to be movable and adjustable in the vertical direction on the left and right stays 4 and 5. has been done.

Now, according to the present invention, when the headrest main body 1 mentioned above is vertically movably supported on the upper end of the seat bag 2, the headrest stay 3
are fixedly erected on the side of the seat back 2, and the headrest main body 1 is supported by the left and right stay portions 4, 5 so as to be movable up and down by the following configuration. That is, according to the present invention, as shown in FIG.
It comprises a headrest frame 10 constituting a headrest main body 1 that is vertically movably supported with respect to left and right stay parts 4 and 5 of a headrest stay 3 which is fixed and erected at the upper end part, Threaded portions 11 are provided on the outer periphery of the right stay portions 4 and 5 facing into the headrest main body 1, and are threaded in opposite directions.
12, and each of these threaded portions 11,
With the gear members 13 and 14 having inner circumferential threads (not shown) that are screwed into the stay parts 12 being held in the gear box 15 fixedly provided on the headrest frame 10 side, each stay part 4, 5, and each of these gear members 13, 14
It is characterized in that it is configured to be rotated in synchronization with the movement adjustment of the headrest main body 1 in the vertical direction. Here, in the figure, 16 is a main drive gear disposed in the center of the gear box 15 meshing with each gear member 13, 14, and 17 is a main drive gear 16 extending below the headrest main body 1.
The gear members 13 and 14 are configured to be rotated via the main drive gear 16 by rotating the external operation knob 17 provided on the rotation shaft 16a of the main drive gear 16. . In addition, 18,1 in the figure
9 connects each stay part 4, 5 to the headrest frame 1
This is a holder portion that is slidably held with respect to 0.

According to such a configuration, the headrest main body 1
By manually rotating the knob 17 when adjusting the vertical movement of the left and right stays 4 and 5,
The gear box 15 on the headrest frame 10 side has an inner circumferential threaded portion that is screwed into the threaded portions 11 and 12 of the
By rotating the gear members 13 and 14 provided therein, the headrest main body 1 can be moved up and down relatively, and the headrest main body 1 can be positioned and held at a desired position by gear coupling.

With this configuration of the present invention, it is not necessary to insert the left and right stay sections 4 and 5 into the seat bag 2 as in the conventional case, and as a result, the seat bag 2
In addition, the headrest body 1 on the stay parts 4 and 5 can be easily and reliably locked at any position by gear coupling, and the height position of the headrest body 1 can be adjusted steplessly. It can be adjusted, and has advantages such as simplifying the structure of each part including the vertical adjustment structure, and making it smaller, lighter, and lower in cost.

FIG. 3 shows another embodiment of the present invention. In this embodiment, in place of the external operation knob 17 for manual operation in the above-described embodiment, an electric motor that can automatically move the headrest body 1 up and down motor 2
0 is used, and the case can be automatically adjusted by remote control, but since the operation and effect are substantially the same, detailed explanation thereof will be omitted.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part of the headrest body 1 and seat back 2 may be modified or changed as necessary, and various modifications may be considered. Let's be. For example, in the above-mentioned embodiment, the headrest stay 3 having a downward U-shape whose lower end is fixed to the upper end of the seat bag 2 is used, but the present invention is not limited to this. Of course, the headrest stay may be used so as to form a substantially downward U-shape by means of a connecting member that connects the upper end of the headrest.

[Effects of the Invention] As explained above, according to the headrest structure according to the present invention, the headrest stay has left and right stays that are fixed and erected on the upper end of the seat bag, and the left and right stays have The gear is equipped with a headrest frame constituting a headrest main body that is supported so as to be movable up and down, and has threaded portions formed on the outer periphery of the left and right stay portions, and an inner threaded portion that is screwed into these threaded portions. The members are held in a gear box attached to the headrest frame side, and are arranged so as to be screwed into each stay part, and these gear members are synchronized when adjusting the vertical movement of the headrest body. Despite the simple and inexpensive configuration, the gear member installed in the gear box on the headrest frame can be rotated automatically by external manual operation or an electric motor, etc. The headrest main body can be moved up and down relative to each other via the left and right stays, each of which has a threaded part with its inner circumferential threaded part, and the headrest main body can be positioned and held at a desired position, which has various practical advantages. effective.

In particular, according to the present invention, it is not necessary to insert the left and right stay sections into the seat bag as in the conventional case, which allows the seat bag to be made thinner, and the head rest on the stay section can be freely adjusted by gear coupling. Not only can it be easily and reliably locked in position, but the height position of the headrest body can be finely adjusted steplessly, and the structure of each part, including the vertical adjustment structure, has been simplified, small, lightweight, and This has advantages such as cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of the headrest structure according to the present invention, with the main parts enlarged, FIG. 2 is a schematic perspective view for explaining a seat structure having a headrest, and FIG. It is a schematic perspective view which shows another Example. In the figure, 1... Headrest body, 2... Seat back, 3... Headrest stay, 4, 5...
Left and right stay parts, 10...Head rest frame, 11, 12...Threaded part, 13, 14...Gear member, 15...Gear box, 16...Main drive gear, 17...Manual external operation knob, 20 ...Electric motor.

Claims (1)

[Scope of utility model registration request] The left side is fixed to the upper end of the seat back.
The headrest stay includes a headrest stay having a right stay part, and a headrest frame forming a headrest body supported vertically movably with respect to the left and right stay parts of the headrest stay, A gear member having threaded portions formed on the outer periphery of the stay portion and an inner circumferential threaded portion that is screwed into these threaded portions is held in a gear box attached to the head rest frame side, and a gear member is attached to each stay portion. A headrest structure characterized in that the gear members are screwed together and are configured to rotate in synchronization when adjusting the vertical movement of the headrest main body.