JP2011068281A - Headrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest allowing simplification of a structure, few limitations in layout and reduction of manufacturing cost, in spite of the structure allowing prevention of entering of other objects into a headrest body from a stay insertion hole and improvement of outer appearance of the headrest. <P>SOLUTION: The headrest includes a stay 7 fixed at an upper end part of a seat back in a projected upward state from the upper end part of the seat back and the headrest body 8 connected to an upper end part of the stay 7 to be rotatable around a horizontal shaft core O. In the headrest, the oblong hole shaped stay insertion hole 14 allowing relatively moving of the stay 7 according to rotation of the headrest body 8 is formed in the headrest body 8. The stay insertion hole 14 is covered with a belt-shaped member 20 by fixing one end part of the belt-shaped member 20 with elasticity and the other end part to the stay 7 and a headrest frame 9, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention
A stay fixed to the upper end of the seat back so as to protrude upward from the upper end of the seat back;
A headrest body rotatably connected to the upper end of the stay around a horizontal axis;
The present invention relates to a headrest in which a long hole-like stay insertion hole that allows the stay to move relatively with the rotation of the headrest body is formed in the headrest body.

In a headrest attached to a seat back of an automobile seat, a headrest main body is rotatably connected to an upper end portion of a stay around a horizontal axis for securing a rear view and adjusting a front / rear position of the headrest. In addition, a long hole-like stay insertion hole that allows the stay to move relatively with the rotation of the headrest body is formed in the headrest body to avoid interference between the stay and the headrest body when the headrest body rotates. Yes.
Conventionally, the inside of the headrest body has been exposed by a long hole-like stay insertion hole (see Patent Document 1).

JP 2008-273445 A

According to the above-described conventional structure, since the inside of the headrest body is exposed by the stay insertion hole, there is a possibility that other objects may enter the headrest body from the stay insertion hole. In addition, the inside of the headrest body can be seen from the stay insertion hole, and the appearance of the headrest is impaired.
As a means for solving this problem, it is conceivable to move the resin material covering the stay insertion hole together with the stay as the headrest body rotates.
However, according to this means, since the resin material moves together with the stay, it is necessary to provide a guide portion for the resin material in the headrest body, and the structure becomes complicated. In addition, there are restrictions on the layout, such as a frame not being provided in the movement range of the resin material. In addition, it is necessary to mold the resin material into a shape along the rotation trajectory of the stay, which is costly to mold.
The present invention has been made in view of the above-mentioned actual situation, and its purpose is to prevent other objects from entering the headrest main body from the stay insertion hole, and to improve the appearance of the headrest. The object of the present invention is to provide a headrest that can simplify the structure, reduce the restrictions on the layout, and reduce the manufacturing cost.

The present invention
A stay fixed to the upper end of the seat back so as to protrude upward from the upper end of the seat back;
A headrest body rotatably connected to the upper end of the stay around a horizontal axis;
A headrest formed in the headrest body with a long hole-like stay insertion hole that allows the stay to move relatively with the rotation of the headrest body,
One end of the belt-like member having elasticity is fixed to the stay, the other end is fixed to the headrest frame, and the stay insertion hole is covered with the belt-like member. (Claim 1)

According to this configuration, one end portion of the belt-like member having elasticity is fixed to the stay, the other end portion is fixed to the headrest frame, and the stay insertion hole is covered with the belt-like member. When rotating around the horizontal axis, the belt-shaped member expands and contracts with the stay insertion hole.
As described above, since the stay insertion hole is covered with the belt-like member having elasticity, the belt-like member can prevent other objects from entering the stay insertion hole. Moreover, the internal member of the stay insertion hole can be hidden by the belt-like member, and the appearance of the headrest can be improved. And it is not necessary to guide a strip | belt-shaped member with rotation of a headrest main body, and a guide member can be made unnecessary. Therefore, a space for arranging the guide member is unnecessary, the structure of the headrest body can be simplified, and the manufacturing cost can be reduced.
Furthermore, since the belt-like member has elasticity, the degree of freedom for setting the movable range of the belt-like member can be increased. In addition, when the headrest frame and the stay are combined, a belt-like member can be attached to the headrest frame and the stay, and the assemblability during the work of covering the headrest pad and the skin material on the headrest frame can be improved. . (Claim 1)

In the present invention,
If the stay is inserted through a through-hole formed in one end of the band-shaped member, one end of the band-shaped member can be fixed to the stay without using a special fixing tool. The workability of the mounting and fixing work can be improved. (Claim 2)

In the present invention,
When a reinforcing member is superimposed on one end of the belt-like member to reinforce the one end of the belt-like member, the following effects can be achieved. (Claim 3)

  The durability of the band-shaped member can be improved by the reinforcing member, and the life of the band-shaped member can be extended even if the expansion and contraction of the band-shaped member is repeated many times by repeated rotation of the headrest body. (Claim 3)

In the present invention,
When the belt-like member is in the most extended state when the headrest body is tilted most forward, the following effect can be obtained. (Claim 4)

  When the headrest body tilts most forward, the stay insertion hole between the stay and the upper edge of the stay insertion hole is the longest, but when the headrest body tilts most forward, the belt-like member is in the most tensioned state. Therefore, even if the belt-like member is pushed by another object, the belt-like member becomes difficult to extend, and it is possible to effectively prevent the other object from entering the stay insertion hole.

According to the present invention,
Although it is possible to prevent other objects from entering the headrest body through the stay insertion hole and improve the appearance of the headrest, the structure can be simplified and the layout restrictions can be reduced. The headrest can reduce the manufacturing cost, increase the degree of freedom of setting the movable range of the belt-like member, and improve the assembly during the work of covering the headrest pad and skin material on the headrest frame Could be provided.

Vertical sectional view of the upper end of the seat back pad It is the perspective view which looked at the headrest (except skin material and a headrest pad) from back, and is a perspective view which shows the attachment method of a rubber band (A) is a perspective view of the standing headrest (excluding the skin material and headrest pad) from the rear, and (b) is the headrest (excluding the skin material and headrest pad) lying in the forward direction from the rear. Perspective view Perspective view of rubber band

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The upper part of the seat back 1 of the seat for motor vehicles is shown in Drawing 1-Drawing 3 (b). The seat back 1 includes a seat frame 2 formed of a pipe material, a seat back pad 3 supported by the seat frame 2, a seat back panel 4, and a skin material 5 that covers the seat back pad 3. The seat back pad 3 is made of soft foamed urethane, and the skin material 5 is made of a cloth material (or leather).

  Then, the upper end portion of the seat frame 2 is aligned with the width direction of the seat back 1, and the lower half 7B of the pair of left and right stays 7 of the headrest 6 is inserted into the headrest stay insertion hole provided in the upper end portion of the seat frame 2 from above. It is inserted and fixed. That is, the stay 7 is fixed to the upper end portion of the seat back 1 so as to protrude upward from the upper end portion of the seat back 1.

  The headrest 6 includes the pair of left and right stays 7 described above, and a headrest body 8 that is rotatably connected to the upper end of the stay 7 around the horizontal axis O. In this way, the headrest body 8 is connected to the upper end portion of the stay 7 so as to be rotatable around the horizontal axis O so that the inclination angle of the headrest body 8 with respect to the vertical direction can be changed and adjusted. Instead of this structure, the headrest body 8 may be configured to be switchable in two stages between a forward lying state (falling posture, forward leaning posture) and a standing state (standing posture).

[Structure of stay 7]
As shown in FIG. 1, the stay 7 is configured by bending the upper end portion of the pipe material along the vertical direction to the front side (vehicle front side). A straight upper end portion 7A1 extending forward of the upper end portion 7A of the stay 7 is formed as a connecting portion with respect to the headrest main body 8 and inserted into the headrest main body 8. Of the upper end portion 7A, the remaining upper end portion 7A2 protruding upward from the upper end of the seat back 1 is bent in a convex arc shape on the rear side.

[Structure of headrest body 8]
The headrest body 8 includes a headrest frame 9 formed in a box shape, and a support frame (not shown) that supports the headrest frame 9 rotatably around a horizontal axis O through a shaft portion 13 extending in the horizontal direction. The headrest pad 11 as a cushion material supported by the headrest frame 9 and the skin material 10 covering the headrest pad 11 are provided, and the connecting portion (straight upper end portion 7A1) of the stay 7 is fixed to the support frame. . The headrest pad 11 is made of soft foamed urethane, and the skin material 10 is made of a cloth material (or leather).

  The headrest frame 9 includes a trapezoidal front wall 9A and rear wall 9B as viewed from the front-rear direction, a pair of upper and lower side walls 9C, an upper end of the front and rear walls 9A and 9B, and an upper end of the pair of left and right side walls 9C. The upper wall 9D to be connected and the bottom wall 9E to connect the lower ends of the front and rear walls 9A and 9B and the lower ends of the pair of left and right side walls 9C are provided. The front and rear walls 9A and 9B are formed in a concavo-convex shape in the longitudinal section (see FIG. 1).

  A pair of left and right vertically elongated stay insertion holes 14 are formed in the lower end 9B1 and bottom wall 9E of the rear wall 9B of the headrest frame 9 and the lower end of the headrest pad 11 and the lower end of the skin material 5. It is. Then, the connecting portions of the pair of left and right stays 7 (the linear upper end portion 7A1 of the stay 7) are respectively inserted into the pair of left and right stay insertion holes 14 from the rear, and accompanying the rotation of the headrest body 8 around the horizontal axis O. The upper end portion 7A of the stay 7 (the arcuate upper end portion 7A2 of the stay 7) is configured to relatively move through the stay insertion hole 14. That is, a long hole-like stay insertion hole 14 that allows the stay 7 to relatively move with the rotation of the headrest body 8 around the horizontal axis O is formed in the headrest body 8. As a result, interference between the upper end portion 7A of the stay 7 and the rear wall 9B of the headrest body 8 is avoided. The upper end portion 15 of the stay insertion hole 14 is set to be wide.

  As shown in FIG. 2 to FIG. 3B, the lower end portion (corresponding to one end portion) of a vertically long rectangular rubber band 20 (corresponding to a belt-like member) having elasticity is fixed to the stay 7, and the upper end A portion (corresponding to the other end) is fixed to the rear wall 9B of the headrest frame 9 with a clip 30 and the stay insertion hole 14 is covered with a rubber band 20. A clip insertion hole 9h is formed in the rear wall 9B of the headrest body 8.

  Further, as shown in FIG. 4, a rectangular resin plate 40 (corresponding to a reinforcing member) is superimposed on the lower end portion of the rubber band 20 and sewn to reinforce the lower end portion of the rubber band 20. A through hole 20H is formed in the lower end portion and the resin plate 40, and the stay 7 is inserted into the through hole 20H. Reference numeral L in FIG. 4 denotes a sewn portion.

  Thereby, the circumference | surroundings of the through-hole 20H of the lower end part of the rubber band 20 can be reinforced, and the expansion of the through-hole 20H can be prevented. As a result, the durability of the rubber band 20 that is repeatedly expanded and contracted by repeated rotation of the headrest 6 can be improved. Further, since the stay 7 is inserted through the through hole 20H, the lower end portion of the rubber band 20 can be attached to the stay 7 without using any special fixing tool, and the rubber band 20 can be attached and fixed to the stay 7. Workability can be improved.

The rubber band 20 is most shortened when the headrest body 8 stands up (see FIG. 3A), and is most extended when the headrest body 8 tilts most forward (see FIG. 3B). It is configured to be in a state. Thereby, when the headrest main body 8 rotates around the horizontal axis O, the rubber band 20 expands and contracts along with the stay insertion hole 14.
When the headrest body 8 tilts most forward, the stay insertion hole portion between the stay 7 and the upper end edge of the stay insertion hole 14 becomes the longest, but when the headrest body 8 tilts most forward, the rubber band 20 has the most tension ( When the rubber band 20 is pushed by another object, the rubber band 20 is not easily stretched. Therefore, it is possible to effectively prevent the other object from entering the stay insertion hole 14. it can.

  3B, the fixing portion of the rubber band 20 to the headrest frame 9 moves away from the stay 7, so that the rubber band 20 is extended so as to cover the stay insertion hole 14 of the stay 7. . In the standing state of the headrest main body 8 shown in FIG. 3A, the rubber band 20 contracts, but stays in the headrest frame 9 without loosening.

  Thereby, the stay insertion hole 14 of the headrest main body 8 is completely covered with the rubber band 20 in the forwardly tilted state and the standing state of the headrest main body 8, and the intrusion of other objects into the stay insertion hole 14 can be prevented. In addition, the appearance of the headrest 6 can be improved by hiding the internal member of the stay insertion hole 14 by the rubber band 20.

[Another embodiment]
In the above embodiment, the rubber band 20 is used as a band-shaped member that closes the stay insertion hole 14. However, the band-shaped member may be formed of other materials as long as a certain degree of stretchability can be secured.

DESCRIPTION OF SYMBOLS 1 Seat back 7 Stay 8 Headrest main body 9 Headrest frame 14 Stay insertion hole 20 Band-shaped member (rubber band)
20H Through hole 40 Reinforcement member (resin plate)
O Horizontal axis core

Claims (4)

A stay fixed to the upper end of the seat back so as to protrude upward from the upper end of the seat back;
A headrest body rotatably connected to the upper end of the stay around a horizontal axis;
A headrest formed in the headrest body with a long hole-like stay insertion hole that allows the stay to move relatively with the rotation of the headrest body,
A headrest in which one end of a belt-like member having elasticity is fixed to a stay and the other end is fixed to a headrest frame, and the stay insertion hole is covered with the belt-like member.   The headrest according to claim 1, wherein the stay is inserted through a through hole formed at one end of the belt-shaped member.   The headrest according to claim 1 or 2, wherein a reinforcing member is overlapped on one end of the belt-shaped member to reinforce the one end of the belt-shaped member.   The headrest according to any one of claims 1 to 3, wherein the belt-shaped member is in the most extended state when the headrest body is tilted most forward.

Images