JPH09206164A - Insert for tiltable headrest and tiltable headrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an insert and a headrest from becoming heavy even when the tilting angle range of a pillow part is set large, to facilitate molding and to prevent the buffering property of the pillow part from being damaged. SOLUTION: For this insert 10 of the movable headrest, a core body 21 is attached turnably forward and backward in a prescribed angular range to the upper horizontal part 13 of an approximately U-shaped stay 11. Then, while a turning control surface 15 composed by denting a part of the outer peripheral surface is formed on the horizontal part of the stay 11, on the core body, a cylindrical part 23 for rolling in and turnably holding the horizontal part of the stay is formed at the lower part of a main body part 22 composed of a metallic plate and a turning control projection part 27 for controlling the turning of the core body by being abutted to the turning control surface at the time of the maximum turning of the core body is formed at a part facing the turning control surface in the cylindrical part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable headrest insert capable of adjusting a front-back inclination angle of a pillow portion and a foldable headrest using the insert.

[0002]

2. Description of the Related Art A vehicle seat is provided with a headrest for the purpose of protecting an occupant's head in the event of a collision. This headrest is usually composed of a pillow portion and an insert in which the upper portion is embedded in the pillow portion and the lower leg portions project from the bottom surface of the pillow portion.

As the headrest, there is a retractable headrest capable of adjusting the front-rear tilt angle of the pillow portion according to the physique and preference of the occupant. FIG. 7 is a sectional view of a conventional retractable headrest 40, and FIG. 8 is a perspective view showing an insert 51 thereof. In the headrest 40, the pillow portion 41 has a structure in which the surface of the foam 42 is covered with a skin 43 such as fabric. On the other hand, the insert 51 includes a stay 54 in which a horizontal portion 53 is formed between the upper ends of two legs 52 by bending a hollow metal pipe or a solid rod having a substantially circular cross section into a substantially U-shape, and the stay 54. It is composed of a core body 55 attached to the horizontal portion 53 so as to be rotatable back and forth.

The core body 55 is formed by bending a metal plate having a predetermined width to have a substantially U-shape in a front view, which is composed of both side surfaces 56 and an upper surface 57. 58 is pivotally attached. The pivotal body 58 is pivotally mounted so that a frictional resistance works to fix the position of the pivotal body 58 between the rotary body 58 and the side surface 56. A horizontal portion 53 of the stay is welded to the lower end of the rotating body 58, and
The core body 55 can be rotated back and forth with respect to. The distance between the side surfaces 56 of the core body 55 is shorter than the length of the horizontal portion 53 of the stay, and two recesses 59a and 59b are formed in the front and rear of the lower end.

Then, the tilt angle of the pillow portion 41 is adjusted by rotating the pillow portion 41 of the headrest together with the core body 55 inside the headrest back and forth with respect to the stay 54. At this time, the maximum tilt angle is restricted by the recesses 59a and 59b at the lower end of the core body 55 when the core body 55 is rotated by a predetermined angle.
This is done by colliding the vicinity of both ends of the horizontal portion 53 of the stay with the rotation of the core body 55 being blocked.

However, in the above structure, when it is attempted to set the tilt angle range of the pillow portion 41 (maximum rotation angle of the core body) to be large, the concave portions 59 formed at the front and rear of the lower end of the core body 55.
Since the distance between a and 59b must be increased, the front-rear width (thickness) a of the core body 55 becomes large, and the weight of the core body 55, that is, the headrest as a whole becomes heavy. This is a problem that cannot be ignored because it goes against the weight reduction of automobiles. Moreover, as the front-rear width (thickness) of the core body 55 increases, the proportion of the core body 55 in the foam body 42 of the pillow portion 41 increases and the foam body 42
Since the gap between the front surface (the surface of the pillow portion on the head contact side) and the core body 55 is small, the elastic deformation of the foam body 42 may be impaired. Therefore, in order to ensure a sufficient distance between the core body 55 and the front surface of the foam 42, the thickness (front-back width) of the foam 42
In addition to making the headrest heavy, there has been a problem that not only the headrest becomes heavy, but also the amount of foam and skin used increases and the price of the headrest rises.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and the insert and the headrest do not become heavy even if the tilt angle range of the pillow portion is set large,
Moreover, the present invention provides an inexpensive foldable headrest insert and foldable headrest that are easy to mold and do not impair the cushioning property of the pillow portion.

[0008]

The invention relating to the insert of the retractable headrest described in claim 1 is a substantially U-shaped sticky body in which a horizontal portion having a substantially circular cross section is formed between the upper ends of two legs. In the insert of the retractable headrest, which comprises a core body attached to the horizontal portion so as to be rotatable back and forth within a predetermined angle range, the stay is a rotation restriction in which a part of the outer peripheral surface is depressed in the horizontal portion. On the other hand, the core body is formed with a tubular portion that rotatably holds the horizontal portion of the stay around the lower portion of the main body portion made of a metal plate. A rotation restriction protrusion is formed at a portion facing the rotation restriction surface so as to restrict the rotation of the core body by hitting the rotation restriction surface when the core body rotates maximum.

The invention of a retractable headrest described in claim 2 is a substantially U-shaped stay in which a horizontal portion having a substantially circular cross section is formed between the upper ends of two legs, and the horizontal portion has a predetermined angle. An insert of a retractable headrest consisting of a core body mounted so as to be rotatable back and forth within a range is embedded in the pillow portion of the headrest at the core portion so that the front and rear tilt angle of the pillow portion can be adjusted. In the inversion type headrest, the stay has a rotation restricting surface in which a part of the outer peripheral surface of the stay is recessed in the horizontal portion, while the core body is provided with a sticking member at the bottom of the main body made of a metal plate. A tubular portion is formed to rotatably hold the horizontal portion and rotatably holds the portion, and the portion of the tubular portion facing the rotation regulating surface contacts the rotation regulating surface at the maximum rotation of the core body. The rotation restricting protrusion that restricts the rotation of the core is shaped Characterized in that it is.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. 1 is a perspective view showing an embodiment of an insert of a retractable headrest according to the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a perspective view of a stay in the same embodiment, and FIG. FIG. 5 is a sectional view showing an embodiment of the retractable headrest of FIG. 5, and FIGS. 5 and 6 are partial sectional views showing a maximum inclination of the pillow portion in the embodiment.

An insert (hereinafter also referred to as an insert) 10 of a retractable headrest according to an embodiment of the present invention shown in FIGS. 1 to 3 comprises a stay 11 and a core body 21, and the core body 21 includes the stay 11. In contrast to this, it rotates back and forth within a predetermined angle range.

The stay 11 is formed by bending a metal hollow pipe having a substantially circular cross section as shown in this embodiment or a solid metal rod (not shown) into a substantially U-shape so as to extend between the upper ends of the two legs 12, 12. The horizontal portion 13 is formed.

The legs 12, 12 are portions to be attached to the seat back, and the lower side surfaces of the legs 12 and 12 are engaged with clips provided on the seat back so that the horizontal portion 13 of the stay 11 is engaged.
A plurality of notches 14 for fixing (that is, a pillow portion of a headrest described later) at a predetermined height are formed in the upper and lower portions.

The horizontal portion 13 is a portion for holding the core body 21 so as to be rotatable back and forth, and a rotation regulating surface 15 is formed in the center portion thereof. The rotation restricting surface 15 restricts the maximum rotation angle of the core body 21, and is a substantially flat surface formed by partially recessing the outer peripheral surface 16 of the horizontal portion 13. In this embodiment, the rotation restricting surface 15 is formed by crushing one side of the outer peripheral surface of the hollow pipe forming the stay 11.
When the stay 11 is a solid rod, one side of the outer peripheral surface of the solid rod may be cut off to form the rotation restricting surface 15 having a substantially flat surface. Further, the rotation restricting surface 15 has a stay 11
The horizontal portion 13 does not have to be limited to one place, and a plurality may be provided at a predetermined interval.

The core body 21 reinforces a pillow portion of a headrest, which will be described later, and holds the pillow portion on the stay 11 so that the pillow portion can be rotated back and forth. The core body 21 has a main body 2
2 and a tubular portion 23 below the metal plate 2, and a metal plate made of an iron plate or the like having a predetermined size is formed into a predetermined shape by bending or the like.

The main body 22 is formed of a plate that can be embedded in the pillow portion of the headrest, and has a peripheral edge 24 bent to one side to increase the rigidity of the main body 22 and penetrates into a predetermined position. A hole 25 is formed so as to firmly bond with the foam of the pillow portion.

The tubular portion 23 is formed by connecting the core body 21 to the stay 1.
The horizontal portion 13 of the stay 1 is rotatably held by the first horizontal portion 13 and is extended by a piece 26 extending from the lower portion of the main body portion 22 to a width (length) substantially equal to the width (length) of the horizontal portion 13 of the stay. Is formed into a tubular shape. Piece 2
6 is spot-welded to the main body portion 22 except for the tubular portion 23 so that the tubular portion 23 does not open. It should be noted that the tubular portion 23 is connected to the inner peripheral surface of the tubular portion 23 and the stay 11 when the core body 21 is rotated (when the tilt angle of the headrest pillow portion is adjusted).
A predetermined frictional force is generated between the outer peripheral surfaces of the horizontal portions 13 of the
Horizontal part 13 so that 1 (pillow part) can be held at a predetermined angle
It is pressed against the outer peripheral surface.

Further, the tubular portion 23 is provided at a portion of the horizontal portion 13 of the stay 11 which faces the rotation restricting surface 15 of the tubular portion 2.
A rotation restricting protrusion 27 is formed so as to protrude into the inside 3. In this rotation restricting protrusion 27, the core body 21 (pillow portion) is
When rotating (tilting) at a predetermined angle with respect to
The core body 21 comes into contact with the rotation restricting surface 15 of the horizontal portion 13 of FIG.
This is to prevent further rotation (tilt) of the (pillow part). In this embodiment, the peripheral wall 28 of the cylindrical portion 23 at the portion facing the rotation restricting surface 15 is bent into the cylindrical portion 23, and the sectional shape of the peripheral wall 28 orthogonal to the longitudinal direction of the cylindrical portion 23 is substantially V.
The peripheral wall inner surfaces 28a and 28b forming the substantially V shape contact the rotation restricting surface 15 to restrict the rotation (inclination). The inner surface 28a of the peripheral wall,
The maximum rotation angle can be adjusted by changing the angle b between 28b. For example, the b is 120
If the angle is in degrees, the maximum rotation angle of the core body 21 becomes 60 degrees,
Further, by setting b to a smaller angle, the maximum rotation angle of the core body 21 (the tilt angle range of the pillow portion) can be further increased. Therefore, even when the maximum rotation angle of the core body 21 (the tilt angle range of the pillow portion) is set to a large value, the thickness and size of the core body 21 do not increase, and the core body 21 becomes heavy and the cushioning property of the pillow portion is reduced. There is no fear of reducing it.

Next, an example of a retractable headrest using the insert 10 will be described. FIG. 4 is a cross-sectional view showing a foldable headrest 30 as an example, FIG. 5 and FIG.
FIG. 7 is a partial cross-sectional view showing a state where the tilt angle of the pillow portion is adjusted.
The headrest 30 is the insert 10 having the above structure.
However, the core body 21 is embedded in the pillow portion 31 so that the front and rear inclination angle of the pillow portion 31 can be adjusted.

The pillow portion 31 is composed of a pillow-shaped foam body 32 of a headrest and an outer skin 33 covering the surface thereof.

The foam 32 is made of elastic foam such as polyurethane foam. This foam 32
The core body 21 of the insert 10 is embedded in the inside of the body 10 so that the foam body 32 and the core body 21 are fixed to each other, and the leg 12 of the stay 11 projects from the bottom surface of the foam body 32. The bottom surface of the foam 32 has a recess 34 at the portion where the leg 12 of the stay 11 projects.
The insert 1 is formed when the tilt angle of the pillow portion 31 is adjusted.
The relative rotation of the leg 12 of the stay 11 with respect to the core body 21 of 0 is not hindered.

Further, the outer skin 33 is a bag-shaped member made of fabric or plastic and is formed by cutting or slush molding. The outer skin 33 has slits or elongated holes 35 formed along the front-rear direction at the portions where the legs 12 of the stay 11 project, and the stay 1 for the core body 21 of the insert 10 is formed.
The relative rotation of the first leg 12 is not hindered.

For forming the pillow portion 31, the outer skin 33 is placed in a foam molding die (not shown) for forming the pillow portion,
The core body 21 of the insert 10 is inserted and arranged in the outer skin 33, the foaming raw material is injected into the outer skin 33, and the foam 32 can be easily formed by integral foam molding. Further, after the foaming raw material is injected into the foam molding die without arranging the skin 33 in the foam molding die to mold a so-called bare headrest, the skin 33 is removed from the foam body 32.
You may cover it.

The foldable headrest 3 thus constructed
0 is attached to the seat of the automobile by inserting the leg 12 of the stay 11 into the upper part of the backrest of the seat.
Then, when adjusting the inclination angle of the pillow portion 31, the pillow portion 3
1 may be pushed back and forth to rotate back and forth, and when the pillow portion 31 has a desired inclination angle, the force for pushing the pillow portion 31 may be released. At that time, the core body 21 in the pillow portion 31 rotates while receiving the frictional resistance between the inner peripheral surface of the cylindrical portion 23 and the outer peripheral surface of the horizontal portion 13 of the stay 11, and the force pushing the pillow portion 31 is released. Thus, the inclination angle of the pillow portion 31 is fixed by the frictional resistance. Further, as shown in FIGS. 5 and 6, when the pillow portion 31 is rotated to the maximum inclination angle, the rotation regulating surface 15 of the horizontal portion 13 of the stay 11 and the rotation regulation of the tubular portion 23 of the core body 21 are regulated. Projection 2
Hitting 7 prevents further tilting.

[0025]

As shown and described above, in the insert of the retractable headrest of the present invention and the retractable headrest using the insert, the outer peripheral surface of the horizontal portion of the stay of the metal insert is recessed. The formed rotation restricting surface and the rotation restricting protrusion formed on the cylindrical portion that rotatably wraps the horizontal portion hit the core body (pillow part) at the time of maximum forward and backward rotation (at the time of maximum inclination), and further. Because of the structure that prevents the rotation (tilt) of the core, the thickness (front-back width) of the core does not increase even if the tilt angle range of the pillow portion is set large.
Therefore, the entire core body and headrest do not become heavy, and there is no risk of hindering the weight reduction of the automobile. Moreover, since the cushioning property of the pillow portion of the headrest does not decrease due to the thick core body, it is not necessary to design the thickness of the pillow portion large in order to secure the cushioning property. Therefore, there is an effect that the degree of freedom in designing the pillow portion is increased, and since it is not necessary to increase the amount of foam used in the pillow portion, the headrest can be inexpensive.

Further, according to the present invention, the core body (pillow portion)
Even when setting the front-back rotation angle (tilt range) of the
Since it is not necessary to provide a large deep-drawn portion in the core body of the insert, the insert has good moldability, and the insert and headrest can be easily molded.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an insert of a retractable headrest according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a perspective view of a stay in the embodiment.

FIG. 4 is a sectional view showing an embodiment of the retractable headrest according to the present invention.

FIG. 5 is a partial cross-sectional view showing a maximum inclination of the pillow portion of the embodiment.

FIG. 6 is a partial cross-sectional view showing the maximum inclination of the pillow portion in the opposite direction of the embodiment.

FIG. 7 is a cross-sectional view of a conventional retractable headrest.

FIG. 8 is a perspective view showing an insert of a conventional retractable headrest.

[Explanation of symbols]

 10 insert 11 stay 12 leg of stay 13 horizontal part of stay 15 rotation control surface 16 outer peripheral surface of horizontal part of stay 21 core body 22 main body part of core body 23 cylindrical part of core body 27 rotation restriction projection part 30 folding Type headrest 31 Pillow part 32 Foam 33 Skin

Claims (2)

[Claims] 1. A substantially U-shaped stay in which a horizontal portion having a substantially circular cross section is formed between the upper ends of two legs, and a core body attached to the horizontal portion so as to be rotatable back and forth within a predetermined angle range. In the insert of the foldable headrest, the stay includes a horizontal portion having a rotation restricting surface in which a part of the outer peripheral surface is depressed, and the core body is formed on a lower portion of a main body made of a metal plate. A tubular portion that rotatably holds the horizontal portion of the stay is formed, and at the portion of the tubular portion that faces the rotation regulating surface, the rotation regulation is performed when the core body is maximally rotated. An insert for a retractable headrest, characterized in that a rotation-regulating projection is formed which abuts against a surface to regulate the rotation of the core. 2. A substantially U-shaped stay in which a horizontal portion having a substantially circular cross section is formed between the upper ends of two legs, and a core body attached to the horizontal portion so as to be rotatable back and forth within a predetermined angle range. In the retractable headrest, wherein the insert of the retractable headrest is embedded in the pillow portion of the headrest at the core portion and the front-back inclination angle of the pillow portion can be adjusted, the stay is a horizontal portion of the outer periphery thereof. A rotation restricting surface is formed in which a part of the surface is dented. On the other hand, the core body has a lower portion of a main body made of a metal plate,
A tubular portion is formed to rotatably hold the horizontal portion of the stay and is rotatably held, and at the portion of the tubular portion facing the rotation regulating surface, the rotation regulating surface at the maximum rotation of the core body. A retractable headrest, comprising a rotation restricting protrusion that restricts the rotation of the core body when hitting.