JPH0531976Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head restraint device for a vehicle, and particularly to a head restraint device suitable for use in a so-called full flat seat in a one-box vehicle or the like.

[Prior Art] In recent years, it has become possible to make the seat backs of the front and rear seats of one-box cars and the like fold back, forming a flat seat surface that continues from front to back when folded back, which can be used as a bed, etc. A so-called full flat seat is provided.

In such a fully flat seat, the headrest provided on the seatback prevents the formation of a continuous seat surface, so conventionally the headrest was removed when the seatback was folded back, or
Some seat bags are designed to be drawn into recesses provided at the head rest and the upper end of the seat bag to form a continuous surface when the seat bag is folded backwards.

[Problems to be Solved by the Invention] The above-mentioned structure in which the head rest is removed has the problem that it is necessary to separately provide a storage space for the head rest, which makes it impossible to use space effectively, and that it also requires effort to attach and detach. Although this problem does not occur with a structure that is retracted into the recess, the headrest and the seat back have different cushioning properties, which may give a sense of discomfort, and there is also the problem that the headrest cannot be adjusted by a large amount.

The present invention solves these problems by creating a headrest for a vehicle that does not require the effort of installing the headrest, makes effective use of space, does not cause any discomfort when used fully flat, and allows for sufficient adjustment of the headrest. The purpose is to provide equipment.

[Means for Solving the Problems] To explain the configuration of the present invention with reference to FIG. 1, a box-shaped support 2 is provided with a support opening 61 on the upper surface for inserting and holding the lower end of the stay 11 of the headrest 1.
It is connected to a support shaft 73 provided at the upper end of the seat back S which can be folded backwards so as to be rotatable backwards, and a locking piece 3 is provided in the support body 2 and fixed to the support shaft 73. A locking piece 4 is provided which engages with the locking piece 3 in the upright position of the body 2 to hold the support body 2 in the upright position, and a lever 5 for unlocking the locking piece 4 is provided.
is provided at the lowest position of the movement path of the lower end of the stay 11 inserted through the support opening 61, so that when the headrest 1 is pushed down the most, the lower end of the stay 11 comes into contact with the unlocking lever 5 and locks it. It is designed to be activated.

[Function] When the seat is seated, when the support body 2 is erected at the upper end of the seat back S (FIG. 4) which stands up at a slight incline, the lock piece 4 provided on the support body 2 engages with the locking piece. 3 and is held in an upright position. At this time, the stay 11 is inserted into the support opening 61.
A headrest 1 whose lower end is supported is positioned above the seat bag S.

When the seat back S is tilted backwards to be fully flat, when the headrest 1 is pushed down to the lowest position, the lower end of the stay 11 comes into contact with the lock release lever 5, actuating it and locking it with the lock piece 4. The engaged state of piece 3 is released. Thereby, the support body 2 and the headrest 1 supported by the support body 2 can be rotated backward.

After rotating the support body 2 (the fifth
Figure) When the seat back S is tilted back to the horizontal position, the headrest 1 is moved between the seat back S and the floor F.
It is stored in a suspended state between (Figure 6).

[Example] In FIG. 4, supports 2 are provided at the left and right upper ends of the seat bag S in the upright state, forming a continuous surface with the seat bag S so as to constitute a part of the seat bag S.
Each of the supports 2 supports the lower end portions of stays 11 that extend bent from both end surfaces of the headrest 1 located above the seat back S. Each of the supports 2 is rotatable backwards due to the structure described later.

Details of such a support structure are shown in FIGS. 1 and 2.

The seat bag S has an inward rectangular concave shape on both sides of the upper end (only one side is shown in FIG. 2), and a support bracket 7 is fixed to a frame S1 inside the seat bag S with its surface exposed. The support bracket 7 has weld nuts 71 at two places on the back side.
72 is provided.

The support body 2 is a frame 2 made of a rectangular open box.
1, the frame 21 is inserted through a through hole 22 provided at the center of the lower part of the frame 21, and the weld nut 7 is inserted into the frame 21.
It is rotatably supported by a stepped bolt 73 (FIG. 3) fixed to 1. A ratchet plate 3, which is a locking piece, is inserted and fixed into the large diameter portion of the stepped bolt 73 through its center hole 31.

The ratchet plate 3 has a step formed at the top of its peripheral surface to serve as a locking portion 3a. In addition, a stepped bolt 74 (the first
) is inserted into the frame 2, and the bolt 74 is inserted into the frame 2.
The bracket 7 is inserted through the arcuate hole 23 of 1.
It is fixed to a weld nut 72 of.

Therefore, the rotation range of the frame 21 is between the vertical position shown in the figure where one end of the punch hole 23 abuts the bolt 74 and the backward position where the other end of the punch hole 23 abuts the bolt 74. regulated by.

The frame 21 has mounting holes 24 and 25 (second
) is provided, and a lock piece 4 is rotatably attached to the attachment hole 24 at its center by caulking with a pin. In addition, a lock release lever 5 is provided in the mounting hole 25.
is rotatably attached at one end by caulking a pin.

A coil spring 8 (Fig. 1) is stretched between one end of the lock piece 4 and the frame 21, and the spring force of the coil spring 8 causes the lock piece 4 to rotate clockwise so that its tip end It comes into contact with the locking portion 3a of the ratchet plate 3. In this state, the frame 21 is prevented from rotating and is held in the vertical position shown in the figure.

The middle portion of the lock release lever 5 is connected to one end of the lock piece 4 by a link rod 91, and when the tip of the lever 5 rotates downward as shown by the arrow in the figure, the lock piece 4 is released. It is rotated counterclockwise and is disengaged from the locking portion 3a.

A mounting opening 26 is provided in the center of the upper surface of the frame 21.
A cylindrical headrest support 6 of a known structure is inserted through this from above, and its tip is connected to an L-shaped bracket 2 provided within the frame 21.
It is fixed in the mounting hole 7 (Fig. 2).

The lower end of the stay 11, which is bent and protruded from the end surface of the head rest 1, is inserted into the support opening 61 of the head rest support 6. The stay 11 slides up and down within the headrest support 6 and is fixed at a plurality of predetermined positions, and when the headrest 1 is pulled down to its lowest position,
The stay 11 has moved downward as shown by the chain line in the figure.
The lower end of the lever contacts the tip abutting surface 5a of the lock release lever 5 and pushes it down.

The support body 2 is constructed by covering the frame 21 with a pad material 92 (FIG. 1), which is further covered with a skin material 93 whose design matches that of the seat back S.

In the headrest device described above, when the support body 2 is rotated to a vertical position during normal use and the headrest 1 is pulled up to an appropriate position, the lock piece 4 rotates by the spring force of the coil spring, and its tip touches the locking part of the ratchet plate 3. 3a. Thus, the support body 2 is held in a vertical position, and the headrest 1 is positioned above the seat back S (FIG. 4).

When the seat is used fully flat, when the headrest 1 is pushed down to the lowest position, the lower end of the stay 11 touches the contact surface 5a of the lock release lever 5.
and rotate it downward. As a result, the tip of the lock piece 4 rotates upward and is disengaged from the locking portion 3a. When the headrest 1 is pushed rearward in this state, it falls back into a horizontal position together with the support 2 (FIG. 5).

After this, when the Seatback S is tilted to a horizontal position,
Its tip forms a fully flat surface that is continuous with the front end of the seat cushion of the rear seat. At this time, the headrest 1 is stored in a suspended state between the floor F below the seat bag S (FIG. 6).

[Effects] According to the headrest device of the present invention, when the seat is used fully flat, there is no need to take the trouble of removing the headrest and storing it in another location, and space can be used effectively.

Furthermore, since the foreign head rest does not constitute a part of the fully flat surface, there is no discomfort during use, and a sufficient amount of lifting adjustment of the head rest can be ensured.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of the headrest device;
Figure 3 is an exploded perspective view of the same, Figure 3 is a cross-sectional view of the main part taken along the - line in Figure 1, Figure 4 is an overall perspective view of a vehicle seat equipped with a headrest device in normal use, and Figure 5 is a perspective view of the vehicle seat in normal use. The figure is a perspective view of the main part of the seat at the start of full-flat transition, and FIG. 6 is a schematic side view of the seat when full-flat is used. 1...Headrest, 11...Stay, 2...
Support body, 3...Ratchet plate (locking piece),
4... Lock piece, 5... Lock release lever, 6
...Headrest support, 61...Support opening, 73...Stepped bolt (spindle), 8...Coil spring.

Claims (1)

[Scope of utility model registration request] A box-shaped support having a support opening on the top surface for inserting and holding the lower end of the stay of the headrest is connected to a support shaft provided at the upper end of a seat back that can be folded backwards so as to be freely rotatable backwards. ,
A locking piece is provided that is fixed to the support shaft, and a locking piece that engages with the locking piece in the upright position of the support to hold the support in the upright position is provided, and a lever for releasing the lock of the locking piece is provided. , is provided at the lowest position of the travel path of the lower end of the stay inserted through the support opening, so that when the headrest is pushed down the most, the lower end of the stay comes into contact with the unlocking lever and activates it. A vehicle head restraint device characterized by: