JPH04231916A - Cantilever type head rest - Google Patents

Abstract

PURPOSE:To obtain the cantilever type head rest which is strong in the torsional strength, and whose position can be adjusted easily. CONSTITUTION:In a horizontal part 6 of a pillar 5 of an inverted L shape of a hollow member, a head rest 4 is allowed to pass through in a cantilever state and installed axially. In the horizontal part 6, an operating shaft 9 whose rotation only is executed freely is inserted and installed axially. To the outside projecting part of the operating shaft 9, a handle 21 is fixed. Between the operating shaft 9 and the head rest 4, an arbitrary transfer mechanism by which the head rest 4 turns around the horizontal part 6, when the operating shaft 9 rotates is provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cantilever headrest.

0002

[Prior art] Previously known German utility model 191495
In the specification and drawings of No. 9, a headrest is mounted in a cantilevered manner on the tip of a horizontal part of an inverted L-shaped pillar formed by a hollow member in the upper part of the backrest seat, and the horizontal part is provided with a rotary shaft. A cantilever type headrest is described in which a freely movable operating shaft is inserted and mounted from the front side, and a handle is fixed to the base side of the operating shaft.

0003

[Problems to be Solved by the Invention] The above-mentioned known cantilever headrest has a structure in which one side of the headrest is fixed in a cantilever state to the tip of the horizontal part of an inverted L-shaped pillar.
The mounting strength of the headrest is insufficient against twisting. Further, since the handle is fixed to the base side of the horizontal portion, the headrest and the handle are positioned symmetrically across the horizontal portion, and are too far apart to be easily operated. However, even if a cantilever structure is used, the strength against torsion can be increased by attaching the headrest through the horizontal part. In addition, if the operating handle is attached to the front side of the horizontal part that has been penetrated, the position of the handle will be closer to the headrest, and a space free of obstacles will be created around it.
Operation becomes significantly easier.

0004

OBJECTS OF THE INVENTION The present invention provides a headrest that has high strength and is easier to operate even if it is cantilevered.

[0005]

[Means for Solving the Problems] Accordingly, the present invention provides a headrest 4 which is cantilevered through the horizontal part 6 of an inverted L-shaped pillar 5 formed of a hollow member in the upper part of the backrest seat 3. The operating shaft 9, which can only rotate freely, is inserted into the horizontal part 6 from the front side and mounted thereon, and the handle 21 is fixed to the external protruding part of the operating shaft 9, and the operating shaft 9 and the headrest are connected to each other. A cantilevered headrest is provided with an arbitrary transmission mechanism that rotates the headrest 4 around the horizontal portion 6 when the operation shaft 9 rotates.

[0006]

[Example] Examples of the present invention will be explained with reference to the drawings.
1 is a vehicle seat, which is constructed by attaching a back seat 3 to the rear of a seat 2 and attaching a headrest 4 to the upper part of the back seat 3.

5 is a pillar of the headrest 4;
It is integrally formed by a horizontal portion 6 and a leg portion 7 at one end of the horizontal portion 6 by bending a hollow pipe into an inverted L shape. The pillar 5 fixes the lower part of the leg part 7 to the frame within the backrest seat 3, and supports the headrest 4 in a cantilever structure.

Guide grooves 8, 8 parallel to the generatrix direction of the horizontal portion 6 are formed on the outer peripheral surface of the horizontal portion 6 of the pillar 5. The guide grooves 8, 8 are formed so that the ends of the horizontal portion 6 are open. The double guide grooves 8, 8 are formed at positions facing each other, and in this embodiment, they are in a vertical positional relationship.

[0009] Inside the horizontal portion 6, there is a left and right operating shaft 9.
Insert the tip of the A thread groove 10 is formed in a portion of the operating shaft 9 facing into the horizontal portion 6. A moving member 11 is screwed into the thread groove 10. The moving member 11 is formed of a shaft cylinder, has a threaded groove carved into its inner circumferential surface, and has engaging protrusions 12, 12 protruding in the radial direction provided on its outer circumferential surface. engagement protrusion 12,
The tips of 12 are engaged with the guide grooves 8, 8. In this embodiment, the moving member 11 and the engaging protrusions 12, 12 are integrally formed, but a mounting hole is formed in the moving member 11,
The structure may be such that the bases of the engagement protrusions 12, 12 are respectively fitted into the attachment holes, or the engagement protrusions 12, 12 may be formed of synthetic resin.

Reference numeral 13 denotes a skeleton frame of the headrest 4, which includes left and right side plates 14, 14, a surrounding plate 15 surrounding the periphery of the left and right side plates 14, 14, and a surrounding plate 15 that surrounds the peripheries of the left and right side plates 14, 14.
It is constituted by a rotating shaft cylinder 16 in the left and right direction provided between the two. At least the rotating shaft cylinder 16 of the skeleton frame 13 is
The upper half cylinder part 17 and the lower half cylinder part 18 are vertically divided and formed. Inclined cam grooves 19 and 20, which are inclined with respect to the generatrix direction of the rotary shaft cylinder 16, are formed on the outer peripheral surfaces of the upper half cylinder part 17 and the lower half cylinder part 18 of the rotary shaft cylinder 16. The inclined cam groove 19 and the inclined cam groove 20 are formed so as to intersect at the center of the rotary shaft cylinder 16 when viewed from above. Further, the inclined cam grooves 19 and 20 are formed within protrusions having a U-shaped cross section formed on the outer circumferential surface of the rotary shaft cylinder 16.

[0011] The tips of the engaging protrusions 12, 12 protruding from the guide grooves 8, 8 are engaged with the inclined cam grooves 19, 20, respectively. That is, the engaging protrusions 12 of the moving member 11 screwed onto the operating shaft 9 are inserted into the guide groove 8 of the horizontal portion 6,
8 into the horizontal part 6 while engaging from the opening of the rotary shaft cylinder 16.
7 and the lower half cylinder part 18, and the engaging protrusions 12, 12
An inclined cam groove 19 of the rotary shaft cylinder 16 is provided at each tip of the rotary shaft cylinder 16.
. Board 15
are fixed to assemble the skeleton frame 13.

A transmission mechanism is constituted by the operating shaft 9, the moving member 11, the engaging protrusions 12, 12, and the inclined cam grooves 19, 20, and when the operating shaft 9 is rotated, the moving member 11 that is about to rotate is The engaging protrusions 12 , 12 that are engaged with the guide grooves 8 of the horizontal portion 6 move in the left-right direction, and the engaging protrusions 12 , 12 that move together with the moving member 11 engage the rotating shaft cylinder 16 .
Press the peripheral edges of the inclined cam grooves 19 and 20 of the rotary shaft cylinder 16.
The position of the headrest 4 is adjusted by rotating the frame 13 around the horizontal portion 6.

Reference numeral 21 denotes a handle attached to the outer end of the operating shaft 9, and the handle 21 operates the transmission mechanism comprising the operating shaft 9, the moving member 11, etc.

The horizontal portion 6 of the pillar 5 is formed to protrude outward from the right side plate 14 of the frame 13, and the horizontal portion 6 penetrates through the frame 13.

A bearing member 22 of the operating shaft 9 is fixed inside the horizontal portion 6 of the portion protruding from the right side plate 14. The bearing member 22 is fixed by screws 24 to the protrusion of the horizontal portion 6 and a guide member 23 fitted around the outer periphery of the protrusion. Further, a flange portion 25 is formed on the guide member 23, and the flange portion 25 is brought into sliding contact with the right side plate 14 of the skeleton frame 13 to guide the rotation of the skeleton frame 13. A guide member 26 is in sliding contact with the left side plate 14 and is fixed to the outer circumferential surface of the horizontal portion 6 on the leg portion 7 side. Reference numeral 27 denotes a retaining collar located inside the guide member 23 and fixed to the operating shaft 9.

[0016]

[Operation] The present invention has the above-mentioned structure, and the skeleton frame 13 of the headrest 4 is cantilevered through the horizontal part 6 of the inverted L-shaped pillar 5 fixed to the backrest seat 3 side. Therefore, the load applied to the headrest 4 is supported by the horizontal portion 6 of the pillar 5, and it is strong against twisting and can support even a large load.

When the operating shaft 9 is rotated by the handle 21, the thread groove 10 of the operating shaft 9 causes the movable member 1 to be rotated.
1 attempts to rotate, but is guided by the engaging protrusions 12, 12 of the moving member 11 that are engaged with the guide grooves 8, 8 of the horizontal portion 6, and moves to one side in the left-right direction, and the moving member 11 The engaging protrusions 12, 12 that move together push the inclined cam grooves 19, 20 of the rotating shaft cylinder 16, and the rotating shaft cylinder 16 rotates around the outer periphery of the horizontal portion 6 due to the action of the inclined cam grooves 19, 20. 16 rotates the skeleton frame 13 of the headrest 4.
rotates forward around the horizontal portion 6.

Furthermore, when the handle 21 is rotated in the opposite direction, the moving member 11 moves in the opposite direction to rotate the headrest 4 backward. Therefore, even if the headrest 4 is supported by the cantilevered pillar 5, its position can be adjusted by rotating it in the front-rear direction.

In this case, since the operation members such as the movable member 11 are provided in the horizontal part 6 of the fixed pillar 5 to which the skeleton frame 13 is rotatably attached, the headrest 4 on the opposite side to the leg part 7 of the pillar 5 is provided. A handle 21 can be provided on the side of the headrest 4, and by extending the hand on the side of the handle 21 backwards and rotating the handle 21, the seated person can adjust the position of the head without separating the head from the headrest 4. Therefore, the position of the headrest 4 can be easily adjusted.

[0020]

[Effect] In the present invention, the headrest 4 is cantilevered through the horizontal part 6 of the inverted L-shaped pillar 5 formed by a hollow member at the upper part of the backrest seat 3, and is mounted on the horizontal part 6. The operating shaft 9, which can only rotate freely, is inserted from the tip side and mounted,
A handle 21 is fixed to an external protrusion of the operating shaft 9, and a handle 21 is provided between the operating shaft 9 and the headrest 4, so that when the operating shaft 9 rotates, the headrest 4 rotates around the horizontal portion 6. Since this is a cantilevered headrest equipped with an arbitrary transmission mechanism, ■ Even if the cantilevered headrest 4 has the simplest structure, the horizontal part 6 of the pillar 5
Since the headrest 4 is attached through the headrest, the strength against torsion is significantly improved. ■ Since the operation handle 21 is attached to the front side of the horizontal part 6 that has been penetrated, the position of the handle 21 can be as close as possible to the headrest 4, and a space without any obstacles is formed around it, making the operation much easier. becomes easier. This effect is achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vehicle seat.

[Fig. 2] A perspective view of the assembled state.

[Figure 3] Partially longitudinal front view.

[Figure 4] Longitudinal front view.

[Explanation of symbols]

1...vehicle seat, 2...seat sheet, 3...backrest sheet,
4... Headrest, 5... Pillar, 6... Horizontal part, 7... Leg part, 8... Guide groove, 9... Operating shaft, 10... Screw groove, 11... Moving member, 12... Engaging protrusion, 13... Skeletal frame, 14 ... Left and right side plates, 15 ... Surrounding plate, 16 ... Rotating shaft cylinder, 17 ... Upper half cylinder part, 18 ... Lower half cylinder part, 19, 20 ... Inclined cam groove, 2
1... Handle, 22... Bearing member, 23... Guide member, 24
...Screw, 25...Flange part, 26...Guiding member, 27...Brim.

Claims (1)

[Claims] 1. A headrest 4 is cantilevered through a horizontal part 6 of an inverted L-shaped pillar 5 formed of a hollow member in the upper part of a backrest seat 3, and a rotating shaft is mounted on the horizontal part 6. The operating shaft 9, which can be freely rotated, is inserted and mounted from the distal side, and the handle 21 is fixed to the external protrusion of the operating shaft 9.
The cantilever type headrest is provided with an arbitrary transmission mechanism between the operating shaft 9 and the headrest 4 so that the headrest 4 rotates around the horizontal portion 6 when the operating shaft 9 rotates.