JPH0626200Y2 - Vehicle headrest - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle headrest mounted on a vehicle seat.

[Prior Art] A headrest is widely used to prevent an occupant from getting a whiplash due to a collision accident and to stabilize the head position.

Although various structures have been proposed for this headrest,
One of them is a headrest whose schematic structure is shown in FIG.

In the figure, this headrest 100 is a stay 101.
And a cushioning material 105, which is formed by the pad 103 and the skin material 104 and is attached to cover the outer peripheral surface of the frame 102.

Further, the frame 102 is press-molded with a metal plate material, and the front surface 102a and the rear surface 102b, which are formed by bending the cross section in the front-rear direction into a substantially inverted U shape, and the end of the rear surface 102b are bent inward at a substantially right angle. Bottom surface 1
02c is integrally formed, and is formed in a substantially C shape as a whole. The stay 101 is attached to the bottom surface 102c of the frame 102, and the stay 1
After 01, the bracket 106 is attached so that the stay 101 is completely fixed to the frame 102.

In this conventional structure, when the headrest 100 receives the external force G, the shock absorbing material 105 first absorbs the impact energy. Further, when the shock absorbing material 105 receives a large impact energy that cannot be absorbed, the frame 102 is deformed as shown by the alternate long and short dash line in FIG. 4, and the whole shock absorbing material 105 is moved and further absorbed. It will be.

[Problems to be Solved by the Invention] In this conventional structure, since the entire frame 102 is simply formed in a substantially C shape, it is easier to manufacture than a box-shaped frame. When it receives an impact from the outside, it is easily crushed and greatly bent and deformed.
The crushed deformation causes the bent edge to project outward, but if the body of the occupant hits the headrest 100 violently at a position corresponding to the part projecting outward, the occupant may be bruised. There is a problem in terms of safety, such as the risk of

The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle headrest having a structure capable of improving safety.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a front and rear surface whose cross section in the front and rear direction is bent in a substantially inverted U shape and one end of the front and rear surface is bent inward. While attaching one end of the stay to a frame integrally having a bottom surface formed of, a headrest main body formed by covering the outer surface of the frame with a cushioning material, a vehicle headrest configured to be attached to a seat back via the stay, The end portion of the other of the front and rear surfaces is extended and formed in a bent state along the bottom surface and the inside of the one surface, and the frame is multi-wound in a cross section in the front-rear direction at the end portion. It is formed in a closed state.

[Operation] According to this configuration, when impact energy is applied to the headrest, the impact energy can normally be absorbed by the cushion of the cushioning material. Further, when a shock energy that is too large to be absorbed by the cushioning material is received, the multiple wound frame is crushed. When the frame formed by multiple winding is crushed, the crushed action acts as a cushion, and the impact energy that cannot be absorbed can be further absorbed. Also,
The force with which the frame is crushed can be freely set by the material of the frame, the number of windings, and the like, and the size of the cushion can be freely set.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

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

In the figure, a headrest 1 is composed of a frame 2, a cushioning material 3, a stay 4 for attaching a headrest body 1a composed of the frame 2 and the cushioning material 3, etc. to an upper portion of a seat back (not shown). .

More specifically, the frame 2 includes a rear surface 2a and a front surface 2
b, the bottom surface 2c, etc. are integrally formed and formed of a metal plate material. Among these, between the rear surface 2a and the front surface 2b, the cross section in the front-back direction is formed in a substantially inverted U shape. On the other hand, between the front surface 2b and the bottom surface 2c, the bottom surface 2c extends inwardly at a substantially right angle from the end portion of the front surface 2b, and is formed in a substantially L shape. Also,
On the rear surface 2a side, the terminal portion 22 of the rear surface 2a is
c, the front surface 2a and the rear surface 2a are extended and formed in a state of being sequentially bent along the inside. As a result of the extension of the terminal portion 22, the frame 2 is formed in a state in which the entire cross section in the front-rear direction is multiply wound, as shown in FIG. In this embodiment, the tip 22a of the terminal portion 22 is fixed to the inner surface of the rear surface 2a by spot welding. Further, the bottom surface 2c is provided with circular holes 6 (see FIG. 3) penetrating to the left and right positions.

Next, the stay 4 is made of a pipe-shaped metal material and has a horizontal connecting portion 4
a and a pair of stay portions 4b, 4b which are bent at right angles from the left and right ends of the horizontal connecting portion 4a in the same direction, respectively, and are integrally formed in a substantially inverted U shape. There is. The stay 4 is inserted into the pair of holes 6 formed in the bottom surface 2c with the bottom surface 2c tilted downward with respect to the front surface 2b of the frame 2 and opened. Then, after that, the bracket 8 and the bolt 9 and the nut 10 are completely fixed.

On the other hand, the bracket 8 for preventing the stay 4 inserted and engaged in the hole 6 from slipping off has a bulging portion 8a for letting out the horizontal connecting portion 4a of the stay 4 at an intermediate portion and sandwiching the bulging portion 8a. Contact surface portions 8b are provided on both sides, which are in close contact with the bottom surface 2c. Further, each abutting surface portion 8b is provided with a mounting hole (not shown). The bracket 8 is attached after the stay portion 4b is inserted into the hole 6 and the stay 4 is attached to the bottom surface 2c of the frame 2. In this case, the bulging portion 8a is mounted from above so as to receive the horizontal connecting portion 4a. Further, when the contact surface portion 8b is brought into contact with the bottom surface 2c, the bolt 9 is then inserted and further fixed by the nut 10 tightened on the lower side of the bottom surface 2c. As a result, the frame 2 integrated with the stay 4 is formed.

Next, the cushioning material 3 is composed of the pad 12 and the skin material 13. Of these, the pad 12 is foam-molded, and this foam-molding is performed by the frame 2 integrated with the stay 4.
Are put in the same foam molding die (not shown), and the urethane stock solution is injected after that to perform foam molding. By this foaming, the cushioning material 3 in which the outer surface of the frame 2 is covered with the pad 12 and the skin material 13 is formed, whereby the headrest 1 in which the frame 2 and the cushioning material 3 are integrated is made. After that, when the skin material 13 is subjected to a terminal treatment or the like, the integrated headrest 1 is completed.

In the headrest 1 configured as described above, when impact energy is applied from the outside, the impact energy is first absorbed by the cushioning material 3. If the impact energy at this time is so large that it cannot be absorbed by the cushioning material 3 alone, the frame 2 formed by multiple winding of the terminal portion 22 is pushed as shown by the alternate long and short dash line in FIG. Crushed. When the frame formed by multiple winding is crushed, the crushed action acts as a cushion, and the impact energy that cannot be absorbed can be further absorbed. The force with which the frame 2 is crushed can be freely set by the material of the frame 2, the number of windings, and the like.

Therefore, when a large impact force that cannot be absorbed by the cushioning material 3 is received, it is set by the number of windings of the frame 2 without causing the frame 2 to be deformed such that a part of the frame 2 protrudes to the outside. Impact energy can be absorbed by the cushioning effect caused by a slight crushing deformation.

Although the present invention has been described with reference to the above-described embodiment, it is needless to say that the present invention is not limited to the structure of this embodiment, and various changes in design may be made without departing from the scope of the invention. . For example, in this embodiment, the structure in which the terminal portion 22 is wound so that the frame 2 is doubled is disclosed, but any number of layers may be used as long as it is one or more. Further, although the wound terminal portion 22 is disclosed as being formed on the rear surface 2a side, it may be formed on the front surface 2b side.

[Effects of the Invention] As described above, according to the vehicle headrest of the present invention, when a shock force that is too large to be absorbed by the cushioning material is received, a part of the vehicle headrest is deformed to a large extent toward the outside. The impact energy can be absorbed by the cushioning effect caused by a slight crushing deformation set by the number of windings of the frame without making the frame as a frame, so the absorption capacity for impact is increased and safety is improved. improves.

[Brief description of drawings]

1 is an external perspective view showing an embodiment of a vehicle headrest according to the present invention, FIG. 2 is a schematic vertical sectional side view taken along the line AA of FIG. 1, and FIG. 3 is FIG. 1 and FIG. FIG. 4 is an external perspective view showing an essential part of the same headrest shown in the figure, and FIG. 4 is a schematic vertical sectional side view showing an example of a conventional vehicle headrest. 1 ... Headrest 1a ... Headrest main body 2 ... Frame 2a ... Rear surface 2b ... Front surface 2c ... Bottom surface 3 ... Buffer material 4 ... Stay 22 ... Terminal part

Claims (1)

[Scope of utility model registration request] 1. An end of a stay is attached to a frame integrally having a front and rear surface formed by bending a cross section in the front-rear direction in a substantially inverted U shape and a bottom surface formed by bending one end of the front and rear surface inward. And a headrest main body formed by covering the outer surface of the frame with a cushioning material, in a vehicle headrest adapted to be attached to a seat back via the stay, a terminal portion of the other of the front and rear surfaces is attached. A vehicle headrest, characterized in that it is formed to extend along the inside of the bottom surface and the one surface in a bent state, and the frame is formed in a state in which a cross section in the front-rear direction is multiply wound at the terminal portion.