JPH053073Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a support structure for a headrest, and more particularly, to a support structure for a headrest provided in a seat bag that can be deployed rearward with respect to a seat cushion.

(Prior Art) Generally, a head rest is provided at the upper end of the seat back of an automobile seat in order to prevent an occupant's head from tilting backward in the event of a vehicle collision.

By the way, for example, the seat back of the front seat is supported so as to be deployable rearward relative to the seat cushion, and the seat bag is deployed toward the rear seat side, so that the seat cushion of the front seat and the seat back are connected horizontally to the seat cushion of the rear seat. In addition, in the case of a so-called full flat seat, the headrest provided on the seat back becomes a hindrance.

(Problems to be Solved by the Invention) Therefore, conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 60-83456, the headrest is removably supported from the seat back, but with such a structure, As described above, when the seat back of the front seat is extended rearward to make it fully flat, the headrest must be pulled out and removed from the seatback each time, and therefore, the work of removing and installing the headrest is troublesome, and it is difficult to remove it. It is also necessary to secure storage for the head rest.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a headrest support structure that allows the headrest to be easily stored in an out-of-the-way position without removing the headrest from the seat bag when the seat is fully flat. is to provide.

(Means for Solving the Problems) Accordingly, the present invention provides that one longitudinal end of the stay 5 that supports the headrest 4 is connected to the seat back 2.
Supported on the free end of the stay 5, the axial direction of the stay 5 is
The headrest 4 is tilted rearward with respect to the vertical direction of the seat back 2, and the rear side of the center of the headrest 4 is supported at the other end in the length direction of the stay 5, so that the headrest 4 is made to use the stay 5 as a fulcrum. The head rest 4 is rotatably provided with respect to the seat bag 2 between a use position in which it protrudes in the direction of extension of the free end of the seat bag 2 and a storage position in which it retreats toward the side where the seat bag is pivoted to the seat cushion. The seat bag 2 is characterized by being provided with a locking mechanism 7 that locks the seat bag 2 at a position protruding in the direction in which the free end of the seat bag 2 extends.

(Function) According to the present invention, the headrest 4 can be always locked in the use position in the free end extension direction of the seat bag 2, and the locking mechanism 7 can be unlocked to lock the seat bag 2. The headrest 4, which is located in the use position in the direction in which the free end extends, is rotated approximately 180° with the stay 5 as a fulcrum.
By rotating the seat bag 2 to the storage position and then folding the seat bag 2 backward, the seat can be made completely flat without the headrest 4 getting in the way.

(Example) The support structure of a headrest according to the present invention will be explained below according to an example shown in the drawings.

In the figure, F is a front seat, and R is a rear seat. The seat cushion 1 and the seat back 2 of the front seat F are horizontally connected to the seat cushion 3 of the rear seat R by deploying the seat back 2 rearward with respect to the seat cushion 1, Full flat is possible.

Reference numeral 4 denotes a head rest disposed above the seat back 2 in the front seat F, and in the present invention, the head rest 4 is supported on the seat back 2 in the following manner.

That is, as shown in FIG. 2, one lengthwise end of the stay 5 made of a cylindrical rod is fixed to the upper part of the frame 20 of the seat bag 2, and the other lengthwise end of the stay 5 is fixed to the top of the frame 20 of the seat bag 2. A support shaft 50 projects rearward and diagonally upward from the top surface of the seat back 2 and has an axis extending back and forth.
are integrally formed.

On the other hand, a support tube 61 into which the support shaft 50 is inserted and supported is placed in the center of the lower surface of the head rest 4 in the vehicle width direction.
While fixing the support body 6 having a
1, the support shaft 50 of the stay 5 is inserted into the stay 5, and the head rest 4 is rotatably supported by the stay 5. Rotation of the head rest 4 about the support shaft 50 causes the head rest 4 to be attached to the seat bag. 2 (the position shown by the solid line in FIG. 1), and the storage position (the position shown by the two-dot chain line in FIG. ) and can be rotated.

Further, in the embodiment shown in the figure, a locking mechanism 7 is provided between the stay 5 and the support body 6 assembled to the headrest 4 to lock the headrest 4 in the use position in the direction in which the free end of the seat bag 2 extends. There is.

As shown in FIG. 4, the lock mechanism 7 shown in FIG. A non-circular shaft portion 52 having
while forming the support shaft 50 on the support body 6.
A guide hole 62 extending in a direction perpendicular to the length direction of
The lock plate 70 is slidably inserted into the guide hole 62.

The non-circular shaft portion 5 is attached to the lock plate 70.
The lock hole 71 has a width substantially equal to the width between the smooth surfaces 51, 51 of the support shaft 50 and a circular unlocking hole 72 that communicates with one end of the lock hole 71 in the longitudinal direction and through which the support shaft 50 can be inserted. When the lock hole 71 is fitted onto the non-circular shaft portion 52, the headrest 4 is prevented from rotating relative to the seat back 2. When the lock release hole 72 is fitted onto the non-circular shaft portion 52, the headrest 4 is prevented from rotating relative to the seat back 2.
The lock plate 70 is normally rotated relative to the seat back 2 by a coil spring 74 interposed between an operating button 73 provided at one end of the lock plate 70 and the support 6.
The lock plate 70 is biased by a spring force of 4 so that the lock hole 71 is positioned to fit onto the non-circular shaft portion 52.

As shown by the solid line in FIG. 1, a seat equipped with the support structure for the headrest having the above-mentioned configuration usually allows the headrest 4 to be moved to the use position in the direction in which the free end of the seat back 2 extends through the locking mechanism 7. It is used by locking it.

On the other hand, the seat back 2 is expanded rearward with respect to the seat cushion 1, so that the seat cushion 1 and the seat back 2 of the front seat F are horizontally connected to the seat cushion 3 of the rear seat R, so that the seat cushion 2 is fully flat. To do so, first press the operation button 73 of the lock mechanism 7 to slide the lock plate 70, fit the lock release hole 72 with the non-circular shaft portion 52, and then move the headrest 4 into place. By rotating the support shaft 50 as a fulcrum, the head rest 4 is placed in a storage position where it is retracted to the pivoting side with the seat cushion 1 of the seat bag 2, as shown by the two-dot chain line in FIG. 1, and then, The seat bag 2 only has to be laid down backwards, and the headrest 4 does not get in the way when the seat bag 2 is laid down backwards.Moreover, as shown in FIG. It can be stored in the gap between the floor 8 and the floor 8.

(Effects of the invention) As described above, the present invention supports one lengthwise end of the stay 5 that supports the headrest 4 on the free end of the seat bag 2, and directs the axial direction of the stay 5 toward the seat bag 2. The head rest 4 is tilted rearward with respect to the vertical direction, and a rear side of the center of the head rest 4 is supported at the other end in the length direction of the stay 5, so that the head rest 4 is supported on the stay 5 as a fulcrum, and the seat back is 2, the head rest 4 is rotatably provided between a use position in which it protrudes in the direction of extension of the free end of the seat bag 2, and a storage position in which it retreats toward the side where the seat bag pivots to the seat cushion.
By providing a locking mechanism 7 that locks at a position protruding in the direction in which the free end of the seat bag 2 extends, the headrest 4 is normally locked in the use position in the direction in which the free end of the seat bag 2 is extended by the locking mechanism 7. Of course, if the seat is to be made fully flat, the locking mechanism 7 can be unlocked and the headrest 4 can be moved around the stay 5 as a fulcrum, without having to remove the headrest from the seat bag as in the conventional case. The seat bag 2 can be deployed rearward without the headrest 4 becoming an obstacle by simply rotating the seat bag 2 to the retracted position on the side where the seat cushion 1 is connected to the seat cushion 1. The headrest 4 can now be stored in the gap between the seat bag 2 and the floor.

[Brief explanation of the drawing]

Fig. 1 is a side view of a seat to which the headrest support structure according to the present invention is applied, Fig. 2 is a sectional view of the main part, Fig. 3 is a bottom view of the lock mechanism, and Fig. 4 is a main part of the stay 5. The front view and FIG. 5 are explanatory diagrams showing a fully flat state of a seat employing the headrest support structure according to the present invention. 1... Seat cushion, 2... Seat back, 4... Headrest, 5... Stay, 50...
...Support shaft, 7...Lock mechanism.

Claims (1)

[Scope of utility model registration request] A support structure for a headrest 4 provided at a free end of a seat bag 2 that can be deployed rearward with respect to a seat cushion 1, in which one lengthwise end of a stay 5 that supports the headrest 4 is attached to the free end of the seat bag 2. The axial direction of the stay 5 is tilted rearward with respect to the vertical direction of the seat back 2, and the rear side of the center of the head rest 4 is connected to the other longitudinal end of the stay 5. The head rest 4 is moved toward the seat back 2, using the stay 5 as a fulcrum, to a use position where it protrudes in the free end extension direction of the seat back 2, and to a side where the seat back is pivoted to the seat cushion. 1. A support structure for a headrest, comprising: a locking mechanism 7 for locking the headrest 4 at a position protruding in the direction in which the free end of the seat bag 2 extends;