JPH0423715Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shock-absorbing headrest that is movable in the longitudinal direction of a seat and has a shock-absorbing function.

[Conventional technology]

In general, vehicle seats etc. are capable of stably holding occupants while the vehicle is in motion, providing appropriate seating comfort, and reducing fatigue as much as possible even when seated for long periods of time. Therefore, various support devices are attached to various parts of the seat. The most common type of support device is a headrest, which is provided at the upper end of the seat back via a headrest stay to support the head of the seated person on the back surface of the head of the seated person. .

By the way, in such conventional headrests, in order to absorb the impact force applied from the front or rear, the pad material provided inside the headrest body is generally made thicker. When a fairly large impact that cannot be absorbed by the above-mentioned pad material is applied to the headrest main body, the headrest main body itself is constructed to break and absorb this impact force.

[Problem that the invention attempts to solve]

However, in the conventional structure described above, a considerably thick pad material must be used for shock absorption, which not only increases costs, but also makes it difficult to maintain uniform shock absorption performance with such a thick pad material. It is difficult to form a headrest, and variations are likely to occur.Furthermore, if the headrest main body is damaged, it cannot be reused. In particular, when an impact force that is strong enough to cause internal destruction is applied to the headrest body as described above, if this is not noticed, it is unfavorable from a safety standpoint, and it is desirable to take some measures to eliminate these problems. It is rare.

[Means for solving problems]

In order to meet such demands, the shock-absorbing headrest according to the present invention is provided with support brackets extending in the front and back direction on both sides of the headrest stay, which has a substantially downward U-shape. Both sides of the headrest body are attached via parallel links extending upward, and a spring means for always returning the headrest body to a neutral position is connected to the inside of the headrest body and the upper pipe part of the headrest stay on the fixed side. At the same time, the center side of a substantially L-shaped lever is pivotally supported on one side of the upper pipe portion of the head rest stay, and the center side of the substantially L-shaped lever is provided inside the head rest main body at one end of the substantially L-shaped lever. Attach the bracket that is attached to the headrest, and rotatably connect one end of the shock absorber that absorbs the impact force applied to the headrest body to the other end of the L-shaped lever, and connect the other end of the shock absorber to the upper pipe of the headrest stay. It is characterized by being rotatably connected to the other side of the part.

[Effect]

According to the present invention, a spring means that always returns the headrest body to the neutral position is stretched between the inside of the headrest body and the upper end of the headrest stay on the fixed side, and Attach the inside of the headrest main body to one end of a roughly L-shaped lever that extends between the headrest stay and the upper pipe and is pivoted to one side of the upper pipe of the headrest stay.
Since one end of the shock absorber is connected to the other end, and the other end of the shock absorber is connected to the other side of the upper pipe of the headrest stay on the fixed side, the spring means and the shock absorber can be stored compactly inside the headrest main body. is possible,
In response to an impact force from the front or rear, the headrest main body moves while absorbing the impact using the spring means and the shock absorber, thereby minimizing the impact on the seated occupant as well as the passenger in the rear seat.

〔Example〕

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

1 to 3 show an embodiment of the shock-absorbing headrest according to the present invention. In these figures, the shock-absorbing headrest designated by reference numeral 1 is attached to the upper end of the seat bag 2 (see FIG. 3). )
A head rest stay 3 having a substantially downward U-shape is installed and fixed while being inserted and held in the
and a headrest body 4 supported movably in the forward direction on the headrest stay 3. In the figure, reference numerals 5 and 5 indicate support brackets extending in the front-rear direction on both sides of the headrest stay 3, and 6a, 6b, 6a, and 6b indicate the front and rear ends of these support brackets 5 and the headrest main body 4. It will be easily understood that the headrest main body 4 is supported movably in the front-rear direction by the parallel links that are rotatably provided between both inner side portions of the headrest body 4. Further, although not shown in the drawings, the headrest main body 4 described above is of course composed of a main body frame, a pad material attached around the main body frame, and a skin material covering the surface of the main body frame, as is well known.

Now, according to the present invention, in the headrest 1 having the above-described configuration, the headrest main body 4
A coil spring 10 is stretched between the head rest main body 4 and the fixed side head rest stay 3 as a spring means for always returning to the neutral position within the range of movement in the front and back direction. The feature is that a shock absorber 11 that absorbs the impact force applied to the headrest body 4 is provided between the headrest stay 3 side, which is also a fixed side, and the inside of the headrest body 4, which is a movable side. There is.

Here, in the figure, 12 is a hook provided on a frame portion inside the upper end of the headrest main body 4, and 13 is a hook provided on an upper pipe portion of the headrest stay 3.
The coil spring 10 is stretched between 2 and 13. By the biasing force of the coil spring 10, when the headrest main body 4 is moved by an impact from the front or the rear, it is stabilized by returning to a neutral position within its range of movement.

Further, as shown in FIG. 4, the above-mentioned shock absorber 11 includes a cylinder 14 which is filled with a fluid such as oil, and an orifice 15 that slides inside the cylinder 14 and communicates the chambers on both sides of the cylinder. a piston 16 having a piston 16 and a piston rod 17 extending outwardly from the piston 16;
The rod 17 functions as a damper to suppress sudden movement due to the impact force applied to the rod 17 by the resistance of the fluid passing through the orifice 15 via the piston 16. Here, the first
In the figure, 18 is an L-shaped lever rotatably supported on the upper pipe portion of the headrest stay 3, and 19 is an engagement lever provided on a bracket 19a on the side of the headrest main body 4 and that engages with one end of the lever 18. The tip of the piston rod 17 is rotatably connected to the other end of the lever 18 by a pin, and the other end of the cylinder 14 is connected to the head rest stay 3.
It is rotatably supported on the top.

According to this configuration, the headrest main body 4 moves while absorbing the impact force from the front or rear by the biasing force of the coil spring 10 and the shock absorber 11. Furthermore, the impact on passengers in the rear seats can be minimized.

It is preferable that the biasing force of the coil spring 10 is set slightly larger than the force of the shock absorber 11 in order to always return the headrest body 4 to the neutral position when the impact force is removed.

According to the present invention having such a configuration, even if a considerably large impact force is applied, the headrest main body 4 can absorb the impact without being destroyed, and can maintain its impact absorption function. Because of this, it can be used repeatedly, and its molding process is easy and there is no variation in performance. Furthermore, it can demonstrate its performance even with small impact forces, so the thickness of the pad material is made thin. It has the advantage of gaining something.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary. For example, a structure that movably supports the headrest main body 4, It will be easily understood that various modifications can be made to the tensioning position of the coil spring 10 and the like as the spring means, and the position of the shock absorber 11.

[Effect of idea]

As explained above, according to the shock-absorbing headrest according to the present invention, the headrest main body, which is supported movably in the front-rear direction via parallel links on the headrest stay as a fixed side, always returns to the neutral position. A spring means is stretched between the inside of the headrest body and the upper pipe of the headrest stay which is the fixed side, and one end of a shock absorber for absorbing the impact force applied to the headrest body is attached to the headrest stay. The spring means and the shock absorber are connected to the inside of the headrest main body via an L-shaped lever pivotally supported on one side of the upper pipe, and the other end is connected to the upper pipe of the headrest stay on the fixed side, so that the spring means and the shock absorber absorb the impact force. Despite its simple and inexpensive structure, it can appropriately and reliably absorb and absorb the impact force applied to the headrest from the front or rear. There are various excellent practical effects such as being able to eliminate problems caused by absorbing impact by utilizing the destruction of the headrest body.

[Brief explanation of drawings]

FIG. 1 is a schematic exploded perspective view showing one embodiment of the shock-absorbing headrest according to the present invention, FIG. 2 is a schematic perspective view of the assembled state, and FIG. 3 is a schematic side view for explaining the operating state. FIG. 4 is a schematic configuration diagram showing an example of a shock absorber. In the diagram, 1... shock absorbing headrest, 3...
Head rest stay, 4...Head rest main body,
5... Support bracket, 6a, 6b... Parallel links, 10... Coil spring (spring means) 11... Shock absorber.

Claims (1)

[Scope of utility model registration request] Support brackets extending in the front-rear direction are provided on both sides of a headrest stay having a substantially downward U-shape, and both sides of the headrest main body are attached via parallel links extending upward from the front and rear ends of the support brackets, respectively. A spring means for always returning the head rest main body to the neutral position is stretched between the inside of the head rest main body and the upper pipe portion of the fixed side head rest stay,
The center side of a substantially L-shaped lever is pivotally supported on one side of the upper pipe portion of the headrest stay, and a bracket provided inside the front and rear headrest bodies is attached to one end of the substantially L-shaped lever. One end of a shock absorber that absorbs the impact force applied to the headrest body is rotatably connected to the other end of the L-shaped lever, and the other end of the shock absorber is rotated to the other side of the upper pipe portion of the headrest stay. A shock-absorbing headrest characterized by being able to connect.