JPH0550927B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a headrest for a motor vehicle.

Conventional technology Conventional head restraints for automobiles are mainly used as screens to restrict the backward movement of the head in order to prevent whiplash caused by rear-end collisions. There was little consideration.

Among these, inventions that reduce neck fatigue by supporting both the back of the head and the back of the cervical vertebrae have already been proposed, similar to the present invention, but all of them have drawbacks caused by adding a cervical vertebrae support part. was not resolved.

To explain this drawback with reference to FIG. 1 of the present invention, the cervical vertebra support part 1b formed at the lower part of the headrest 1 is formed to protrude more toward the seating side than the occipital support part 1a, so a cervical vertebra support is required. It was a nuisance when I wasn't using it.

For example, when the neck is not fatigued, it may be better not to use cervical vertebrae support as the head can move more freely. At that time, if the cervical support part 1b comes into contact with the neck, the user will feel hot and uncomfortable.

Furthermore, when a person sits with the headrest beyond the vertical adjustment range, such as when a child sits, the cervical vertebrae support portion 1b may hit the back of the child's head and become a nuisance.

In addition, there are individual differences in the appropriate amount of protrusion of the cervical vertebra support portion 1b, and if it is not appropriate, it may become a hindrance, and there is also the problem of how to adjust the amount of protrusion.

As described above, adding the cervical support part 1b to the headrest 1 can reduce neck fatigue to some extent, but the current situation is that no appropriate countermeasures have been taken to address the drawbacks caused by this addition. It is.

Problems to be Solved by the Invention Therefore, the present invention aims to prevent the cervical spine support part 1b from getting in the way when the cervical spine support is not required, and to adapt to individual differences in the cervical spine support position. The goal is to achieve this with a simple configuration.

Means for solving the problem: The lower part of the headrest 1 is made to protrude toward the seating side from the occipital support part 1a of the upper part of the headrest 1 to form a cervical vertebrae support part 1b, so that the back of the occupant's head and cervical vertebrae can be supported together. The block-shaped headrest 1 thus constructed is attached to the upper part of the seat bag 11 by a support 4 passing through its bottom surface, and the connection point between the support 4 and the headrest 1 is set at the upper part of the headrest 1. The problem is solved by constructing a swinging mechanism with a positioning function using the joint point as the swinging center 3, so that the lower part of the headrest can be moved back and forth and its position can be set.

Function The position of the headrest 1 indicated by the solid line in Figure 1 is
This shows that it supports both the back of the head and the back of the cervical vertebrae. In this state, the head is supported in two places: the back of the head and the back of the cervical vertebrae, so the head is stabilized, there is less need to put unnecessary force on the neck, and neck fatigue can be reduced.

On the other hand, when cervical support is not required, the rocking center is 3.
The cervical vertebrae support portion 1b may be swung back around the center. The operation method will be explained based on an embodiment of the present invention.While sitting on the seat, extend both hands behind your head and press both sides of the headrest 1 with both hands.
When you apply a force that rotates the bottom part backwards,
The cervical vertebra support portion 1b can be retracted rearward with a predetermined force or more. This state is shown by a two-dot chain line in FIG. 1, and since the protrusion of the cervical vertebra support portion 1b has receded, the state is almost the same as in the case of a conventional headrest without a cervical vertebra support portion.

On the other hand, since the rocking mechanism of the cervical vertebra support part 1b has a positioning function added, the cervical vertebra support part 1b
By adjusting the front and rear positions of the head, it is possible to adapt to the level difference between the back of the head and the neck, which varies between individuals, and to support the neck in an appropriate state. The vertical position of the cervical vertebra support portion 1b is adjusted by adjusting the depth of the support column 4 inserted into the seat bag 11.

Further, according to the present invention, the swing center 3 is connected to the headrest 1.
Even if the cervical vertebrae support part 1b is moved back and forth, the occipital support part 1a at the upper part of the headrest 1 hardly moves back and forth. As a result, the distance between the headrest and the back of the head can be kept constant, and whiplash caused by the distance between the headrest and the back of the head can be prevented.

When a car hits the driver from behind, the head hits the headrest 1, but the impact force is mainly received by the occipital support part 1a, which is located behind the center of gravity of the head, so the impact force is not particularly applied to the neck. There isn't. Further, if necessary, it is also possible to retreat the cervical vertebra support portion 1b with a predetermined impact force or more.

Embodiment FIG. 2 is a perspective view showing the structure of the present invention. The appearance of the headrest 1 of the present invention is formed into a single block shape as shown by the two-dot chain line. Wrap the entire outer periphery of the internal structure with sponge and install the head rest 1.
An occipital support part 1a is formed at the upper part on the seating side, and a cervical vertebrae support part 1b is formed at the lower part so as to protrude from the occipital support part 1a toward the seating side.

The outer surface of the sponge formed as described above is covered with a covering material such as leather or fabric to complete the headrest 1.

The headrest 1 has a column 4 that passes through its bottom surface.
The connection point between the headrest 1 and the pillar 4 is set at the upper part of the headrest 1, and the connection point is set as the center of oscillation 3, and the cervical support part 1b
It is configured so that it can swing backward. The position of the rocking center 3 is set at almost the same height as the position of the occipital support part 1a, so that even if the cervical vertebrae support part 1b is rocked back and forth, the occipital support part 1a hardly moves back and forth. be able to.

Next, the internal structure of the headrest 1 will be explained. FIG. 3 is a partially exploded view showing the internal structure of the headrest 1. FIG. In the figure, the support column 4 that supports the headrest is a metal rod or pipe bent into a U-shape, and an inverted V-shaped plate 5 is placed over the part that connects the two support columns 4. A connecting plate 6 formed by cutting out a portion near the apex is bent inward to rotatably wrap and connect the connecting portion to form a swing center 3.

A bottom plate 7 is spot-welded to the lowest part of the inverted V-shaped plate 5 to increase the strength of the lower part of the inverted V-shaped plate 5. The bottom plate 7 is provided with a groove 8 through which both the support columns 4 pass, and the structure is such that the support column 4 can move back and forth within the groove 8 with the swing center 3 as the center. The required swing angle is about 30°.

On the other hand, side plates 9a and 9 are provided on both sides of the inverted V-shaped plate 5.
b is spot welded, and both support columns 4 are held down by protrusions 10a and 10b formed at the bottom of both side plates 9a and 9b, and the frictional force creates a moderate resistance force when the headrest swings, providing a positioning function. . The vicinity of the protrusions 10a and 10b formed on both side plates are not welded to the inverted V-shaped plate 5, but are left free to form a leaf spring, thereby stabilizing the resistance force when the headrest swings.

The inverted V-shaped plate 5, the bottom plate 7, and the side plates 9a and 9b are made of thin metal plates.

The outer periphery of the internal structure configured as described above is wrapped with a sponge to form a head rest, and as shown in FIG. do. On the other hand, at the lower part of the headrest 1, the cervical vertebrae support part 1b is also made of sponge material.
form.

Next, a structure of a positioning function different from that described above will be explained. In FIG. 4, the distance between the two supports 4 bent into a U-shape is set to be slightly larger or smaller than the width of both grooves 8 provided on the bottom plate 7, and the distance between the supports 4 is elastically deformed. By penetrating the
It creates a frictional force with the side surface of the groove 8 to provide a moderate resistance force and serve as a positioning function. The other configurations are the same as those of the previous embodiment.

Effects of the Invention According to the present invention, the cervical support part 1b can be swung back as necessary around the swing center 3 provided in the upper part of the headrest, so that the cervical support part 1b does not get in the way. has disappeared.

In addition, since a positioning function has been added to the rocking mechanism of the cervical vertebra support part 1b, by adjusting the front and back position of the cervical vertebra support part 1b, it can be adapted to the level difference between the back of the head and the neck, which varies from person to person. It is now possible to support the neck in an appropriate manner.

Furthermore, when the cervical vertebrae support part 1b moves back and forth, the back and forth movement of the occipital head support part 1a can be reduced, and the distance between the back of the head and the head rest can be kept constant, so it has the same effect on whiplash as a conventional head rest. I was able to get

Furthermore, by swinging and supporting the cervical vertebra support part 1b, the stable movement necessary for moving the cervical vertebra support part 1b back and forth could be created with a simple structure. By using the swinging center as a joint, the degree of freedom of movement can be easily restricted with low frictional force. Except for rotation, the joint does not move forward or backward or up and down, and can only slide in the direction of the swing axis.
Restricting the movement is easy as in this embodiment.

In addition to the above, the present invention is characterized by good swinging operability of the headrest 1. In order to swing the lower part of the headrest 1 back and forth, both sides of the headrest 1 become important operating locations. In this respect, in the present invention, the pillars 4 of the headrest 1 penetrate through the bottom surface of the headrest 1, so the pillars 4 do not get in the way of operation, resulting in good operability.

Furthermore, when performing a swinging operation by applying an external force to the headrest as in the embodiment of the present invention, if the headrest 1 is formed into a single block shape, the direction and position of the force applied to the headrest 1 may be somewhat ambiguous. Since force is transmitted to the entire headrest 1, the headrest can be easily swung.

By solving the conventional drawbacks with a simple structure as described above, it has become possible to put into practical use a headrest for automobiles with cervical vertebrae support, and the benefits from it will be large and long-lasting.

[Brief explanation of the drawing]

FIG. 1 is a side view of the present invention. FIG. 2 is a perspective view showing the structure of the present invention. FIG. 3 is a partially exploded view of the internal structure shown in FIG. 2. FIG. 4 is a perspective view showing the swing positioning structure. 1... Head rest, 1a... Occipital support part, 1b
...cervical vertebrae support part, 3...swinging center, 4...pillar.

Claims (1)

[Claims] 1. A block-shaped headrest, whose lower part protrudes toward the seated side of the upper part of the headrest and is configured to support both the back of the head and the back of the cervical vertebrae of the seated person, is connected to the seatback by a support that passes through its bottom surface. It is attached to the upper part, and the connection point between the column and the headrest is set at the upper part of the headrest, and the connection point is used as the center of swing to constitute a swinging mechanism with a positioning function, and the lower part of the headrest can be moved back and forth and its position. An automobile headrest with cervical vertebrae support, which is characterized by being adjustable.