JPH0542779Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle headrest that is attached to a vehicle seat.

[Prior Art] Headrests are widely used to prevent occupants from suffering whiplash due to collisions and to stabilize the head position.

Various structures have been proposed for this headrest. One of them is a headrest whose structure is shown schematically in FIG.

That is, this headrest 100 has one end 1 of a stay 102 attached to a plate-shaped frame 101 whose cross section in the front-rear direction is bent into an approximately inverted U shape.
02a and this reinforcing base material 10
A cushioning material 103 is attached to the outer surface of the stay 102.
It has a structure that allows it to be attached to a seat bag (not shown) via a.

In this conventional structure, when the headrest 100 receives an external force G, the shock energy is first absorbed by the cushioning material 103. Also, this frame 103
However, if the impact energy is too large to absorb, the front and rear surfaces of the frame 101 may be crushed and deformed, or the frame 101 may tilt using the stay 102 as a fulcrum, causing the entire cushioning material 103 to move. Become.

[Problem to be solved by the invention] In this conventional structure, the entire frame 101 is simply formed in a substantially inverted U shape, so manufacturing is easier than in a case where the frame is formed into a box shape. , it is easily crushed, bent, and deformed when subjected to an external impact. As a result of this crushing and deformation, the bent edge portion protrudes outward, and if the occupant's body violently hits the part of the headrest 100 that corresponds to this outwardly protruding portion, the occupant may suffer bruises or bruises. There were safety issues, such as the possibility of

The present invention has been made in view of the above problems, and its purpose is to provide a headrest for a vehicle having a structure that can improve safety.

[Means for Solving the Problems] In order to achieve the above object, the present invention is such that a headless main body, which is made by covering the outer periphery of a frame to which one end of a stay is attached with a cushioning material, is attached to a seat bag via the stay. In the headrest for a vehicle, the frame is provided with a groove or slit into which the stay does not normally fit, and the stay is mounted correspondingly on the groove or slit, and there is a predetermined distance between the frame and the stay. When a large impact force is applied, the frame moves while being deformed so as to press fit the stay into the groove or slit, thereby alleviating the impact force.

[Function] According to this configuration, when impact energy is applied to the headrest, the impact energy can normally be absorbed by the cushioning material. In addition, if a shock energy that is too large to be absorbed by this cushioning material is received, the periphery of the groove or slit in the frame will be pressed against the stay, deform and expand, and the stay will be press-fitted into this groove or slit. The frame moves relative to the stay. This movement acts as a cushion and can further absorb that absorbed energy.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

FIGS. 1 and 2 show an embodiment of a vehicle headrest according to the present invention.

In the figure, headrest 1 is frame 2.
, a cushioning material 3, and a stay 4 for attaching the headrest main body 1a made up of the frame 2 and the cushioning material 3 to the upper part of a seat bag (not shown).

More specifically, the stay 4 is a pipe-shaped metal material, and includes a horizontal connecting portion 4a and a horizontal connecting portion 4a.
A pair of stay portions 4b, 4 are bent at approximately right angles from both left and right ends facing in the same direction, respectively.
b, and is formed into a substantially inverted U-shape. Further, an auxiliary plate 7 is attached to the upper portion between the pair of stay portions 4b, 4b. This auxiliary plate 7 includes stay portions 4b, 4
Projecting portions 7a each having a substantially U-shaped cross section are provided at positions corresponding to b, and the front surfaces of the projecting portions 7a are welded to the stay portions 4b, 4b.
It is fixed to the front side of the stay 4 by this welding.

The frame 2 integrally has a rear surface 2a and a front surface 2b, which are formed by folding a metal plate material halfway into a substantially inverted U shape, and the overall cross section in the front-rear direction is formed in a substantially inverted U shape. There is. Furthermore, a groove 9 corresponding to the stay 4 is formed on the lower end side of the front surface 2b. This groove 9 corresponds to the shape of the upper side of the stay 4, and the horizontal connecting portion 4 of the stay 4
A horizontal groove portion 9a corresponding to point a and a vertical groove portion 9b corresponding to the upper portion of the stay portion 4b are continuously formed. Furthermore, as shown in Figure 3,
The width dimension d of this groove 9 is the outer diameter dimension D of the stay 4.
Even if the stay 4 is arranged correspondingly on this concave groove 9, the stay 4 is normally
It is set in such a state that it cannot enter into the groove 9. In addition, on the front surface 2b, there are a plurality of (two in the embodiment) mounting screw holes 1 on both sides of the horizontal groove 9a.
3 is provided. This mounting screw hole 13 is for mounting a bracket 8 for fixing the stay 4 to the frame 2 via a screw 15.

On the other hand, this bracket 8 is attached so as to press the horizontal connecting portion 4a of the stay 4 against the front surface 2b from the outside. A bulging part 8a for letting the horizontal connecting part 4a of the stay 4 escape is provided in the middle part, and contact surface parts 8b are provided on both sides of the bulging part 8a to closely contact the front surface 2b of the frame 2. It is being Further, each contact surface portion 8b is provided with a mounting hole 14 corresponding to the mounting screw hole 13 formed in the front surface 2b of the frame 2.

Here, when attaching the stay 4 to the frame 2, first place it on the groove 9 of the frame 2.
The stay 4 is arranged so as to cover the area with the stay 4. Next, the brackets 8 are placed on the frame 2 from the outside of the stay 4 so as to correspond to the portions where the mounting screw holes 13 are formed. In this case, each bracket 8 is attached from the outside so that the horizontal connecting portion 4a is received within the bulge 8a. Further, when the contact surface portion 8b is brought into contact with the front surface 2b of the frame 2, screws 15 are screwed into the mounting screw holes 13 through the mounting holes 14 and tightened.
Then, the bracket 8 is fixed and the stay 4 is fixed.
is fixed to the frame 2 with the concave groove 9 closed. Thereby, the frame 2 integrated with the stay 4 is formed.

Next, the cushioning material 3 is composed of a pad 32 and a skin material 33. Of these, the pad 32 is formed by foam molding, and the stay 4 and the integrated frame 2 are placed in the same foam mold (not shown), and then urethane stock solution is poured into the foam mold. It is something that By this foaming, the outer surface of the frame 2 is made into a pad 32 and a skin material 3.
3 is formed, and a headrest 1 in which the frame 2 and the cushioning material 3 are integrated is produced. Thereafter, the end of the skin material 33 is treated, and the integrated headrest 1 is completed.

In the headrest 1 configured in this way, when impact energy is applied from the outside, the impact energy is first absorbed by the cushioning material 3. Also, if the impact energy at this time is so large that it cannot be absorbed by the cushioning material 3 alone, the frame 2
The peripheral edge portion of the groove 9 is pressed against the stay 4 and deforms and expands. Then, as shown by the dashed line in FIG. 4, the stay 4 that had been placed outside the groove 9 is press-fitted into the groove 9, and the frame 2 is moved against the stay 4. Moving. This movement then acts as a cushion and can further absorb that absorbed energy. Therefore, when a shock force that is too large to be absorbed by the cushioning material 3 is received, the stay 4 can be inserted into the groove 9 without deforming the frame 2 such that a part of the frame 2 protrudes outward. When the frame 2 is press-fitted, the frame 2 moves, and the cushion effect generated by this movement absorbs impact energy, increasing the ability to absorb impact and improving safety.

Although the present invention has been explained using the above embodiments,
Of course, the present invention is not limited to the structure of this embodiment, and various changes in design may be made without departing from the gist of the present invention. For example, although this embodiment discloses a structure in which a groove 9 is formed as a means for press-fitting the stay 4 and moving the frame 2, this may also be formed with a slit 19, as shown in FIG. 6, for example. It is something.
In this case, the slits 19 are formed to be scattered on the front surface 2b corresponding to the portions to which the stays 4 are attached.

[Effects of the invention] As explained above, according to the headrest for a vehicle according to the invention, when an impact force that is too large to be absorbed by the cushioning material is received, a portion of the headrest deforms so that it protrudes outward. The frame moves by pressing the stay into the groove or slit without causing the frame to move, and the shock energy can be absorbed by the cushion effect generated by this movement of the frame, so the shock absorbing power is increased. and improve safety.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of a headrest for a vehicle according to the present invention, and FIG. 2 is an A--FIG.
Schematic vertical sectional side view along line A, Figure 3 is B in Figure 2
FIG. 4 is a sectional view taken along line C-C in FIG. 2, FIG. 5 is an exploded perspective view showing the main parts of the headrest shown in FIGS. 1 and 2, and FIG. 7 is a sectional view of a main part showing a modified example of a vehicle headrest according to the present invention, and FIG. 7 is a schematic longitudinal sectional side view showing an example of a conventional vehicle headrest. 1...Headrest, 2...Frame, 3...
Cushioning material, 4...stay, 9...concave groove, 19...slit.

Claims (1)

[Scope of utility model registration request] A headrest for a vehicle in which a headless main body, which is made by covering the outer periphery of a frame to which one end of a stay is attached with a cushioning material, is attached to a seat bag via the stay, wherein the frame has a groove or slit into which the stay does not normally fit. and the stay is mounted correspondingly on the groove or slit, so that when an impact force larger than a predetermined value is applied between the frame and the stay, the frame moves into the groove or slit. A head rest for a vehicle, characterized in that the stay is configured to move while being deformed so as to be press-fitted to alleviate the impact force.