JPH06327536A - Headrest device - Google Patents

Abstract

PURPOSE:To provide a headrest device capable of moving and rotating a headrest stay with a simple structure. CONSTITUTION:A support member 62 movably supporting a headrest stay 63 is rotatably supported by a bracket 61, and a lock mechanism 64 allowing or restricting the rotating action of the support member 62 via a moving action is arranged between the support member 62 and the fixed member 61.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

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

[0003]

2. Description of the Related Art Conventionally, as a headless device of this type, a device disclosed in Japanese Utility Model Laid-Open No. 2-64439 is known. It has a headless stay rotatably supported in the seat back and a locking mechanism fixed to the bracket and engaging with and disengaging from the headless stay.
In this conventional device, when the locking mechanism is activated and the headless stay is released, the headless stay rotates with respect to the bracket, whereby the headless main body attached to the headless stay with respect to the seat back. It was in a state of being overthrown.

[0004]

However, with the above-mentioned conventional device, the headless stay cannot be moved because the headless main body is moved up and down with respect to the seat back, and the headless stay is moved. In order to do so, it is necessary to move the rotation supporting part of the headless stay, and many structural parts such as guide rails are required, resulting in a complicated structure.

Therefore, it is a technical object of the present invention to provide a headrest device capable of moving and rotating the headrest stay with a simple structure.

[0006]

[Constitution of the invention]

[0007]

The technical means taken in the present invention to solve the above technical problems are a fixing member, a support member rotatably and movably supported by the fixing member, It has a headless stay movably supported by the support member, and a locking mechanism which is arranged between the fixing member and the support member and allows or restricts the rotational movement of the support member. .

[0008]

According to the above technical means, the headless stay is movable with respect to the support member, and is rotated together with the support member with respect to the fixed member by the rotation of the support member. As a result, many components such as guide rails are not required, and the headless stay can be rotated and moved with a simple structure including only the support member.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the rear seat 1 is
It is composed of a seat cushion 2, a seat back 3 and a headless main body 4.

The seat cushion 2 is supported on the floor 5 of the vehicle so as to be able to move up and down through a well-known hinge mechanism and lock mechanism (not shown). The seat back 3 is arranged at the rear portion of the seat cushion 2 and serves as a vehicle structure 7
It is supported so that it can be tilted up and down via a peripheral locking mechanism (not shown). The headless main body 4 is supported by the seat back 3 via a structure 6 to be described later so as to be tiltable and vertically movable.

As shown in FIGS. 2 and 3, the structure 6
Is composed of a bracket 61, a pair of support members 62, a pair of headless stays 63, and a first locking mechanism 64.

The bracket 61 is made of a single plate material, and the flange portions 61a are integrally bent on both sides. The bracket 61 is fixedly arranged in the seat back 3 (see FIG. 1). The flange portion 61a has a vertical direction (see FIG.
A first slot 68 extending in the vertical direction shown (the seat height direction in FIG. 1) and a circle continuous from the first slot 68 and extending in the front-back direction (the left-right direction in FIG. 3 (the seat width direction in FIG. 1)). Each arc-shaped second slot 69 is formed in the pipe member 70. The pair of support members 62 are inserted and fitted in the pipe member 70 and arranged on the side of the flange portion 61a.
The first and second rods 65 and 66 fixed to 0 are rotatably supported on the bracket 61 in the front-rear direction (the left-right direction in FIG. 3 (the seat front-rear direction in FIG. 1)). They are connected via 65 and 66. First rod 6
5 is inserted so as to slide in the first slot 68, and the second rod 66 is inserted so as to slide in the first slot 68 and the second slot 69. The wall surface of the first slot 68 is provided with recesses 68a, 68b for restricting the sliding of the first rod and a recess 68c for restricting the sliding of the second rod 69. A recess 69a for restricting the sliding of the rod 69 is formed. The arc of the second slot 69 is the support member 6
It coincides with the movement locus of the second rod 66 by the rotation of 2.
These first and second slots 68 and 69 and the first and second slots
The rods 65 and 66 form a first lock mechanism 64. The pair of headless stays 63 have upper ends fixed to the headless main body 4 (shown in FIG. 1), and lower ends formed in the support member 62 and extending in the vertical direction.
It is inserted in 2a and is supported by the support member 62 so as to be vertically movable. This headless stay 6
A plurality of notches 63a are formed in one of the three in the longitudinal direction, and the notches 63a can be engaged with and disengaged from the second lock mechanism 67 supported by one of the support members 62. The support member 62 and the second locking mechanism 67 are
A well-known thing that allows the headless body 4 to move up and down is used. Incidentally, the pin (not shown) provided on the support member 62 may interfere with the notch of the headless stay 63 without using the second locking mechanism 67.

Next, the operation will be described.

FIG. 1 shows a normal state in which an occupant can sit on the rear seat 1, and the seat cushion 2 is supported by the floor 5 through a locking mechanism in a sideways state and the seat back 3
Is in an upright state in which it is supported by the structure 7 through a locking mechanism, and the headless main body 4 has the first slot 68.
The first and second rods 65 and 66 are engaged with the recesses 68a and 68c, respectively, so that they are held at positions on the seat back 3 where the head of the occupant can be supported.

In this normal state, the second locking mechanism 6
When the headless main body 4 is moved up and down while operating 7, the headless stay 63 moves vertically with respect to the support member 62, and the notch groove 63 a of the headless stay 63 and the second locking mechanism 67 are engaged with each other. The position changes. As a result, the vertical position of the headrest main body 4 with respect to the seat back 3 is adjusted. When the headless body 4 is moved up to the maximum, the headless stay 63
Is disengaged from the support member 62. As a result, the headrest main body 4 is removed from the seat back 3.

In the normal state, when the headless main body 4 is moved upward without operating the second locking mechanism 67, the headless stay 63 moves upward together with the support member 62, and the first and second rods 65, 66. Slides upward and separates from the recesses 68a and 68c of the first slot 68,
The rod 65 engages with the recess 68b of the first slot 68 and the second rod 66 is arranged in the second slot 69.
As a result, the support member 62 becomes the second rod 69 and the second rod 69 becomes the second rod 69.
The first rod 6 is engaged until it engages with the recess 69a of the slot 69.
5, the headless stay 63 is tilted to bring the headless main body 4 to the backside of the seat back 3 in a tiltable state. After this,
The locking mechanism on the side of the seat cushion 2 is operated to bring the seat cushion 2 into an upright state, and the locking mechanism on the side of the seat back 3 is activated to bring the seat back 3 into a sideways state. By this series of operations, as shown in FIG. 4, the rear seat 1 is in a folded state.

Next, a modified example of the first locking mechanism 64 will be described.

As shown in FIGS. 5 and 6, a first rod 65 is fixed to a support bracket 71 which supports the support member 62. An arcuate ratchet 72 is fixed to the flange portion 61a of the bracket 61, and a pole 73 meshing with the ratchet 72 is rotatably supported on the first rod 65. A turnover spring 74 is provided between the pawl 73 and the flange portion 61a so that the pawl 73 can be held at two positions. Further, stopper bodies 75 and 76 are integrally formed on the flange portion 61a of the bracket 61 to contact the pole 73 and switch the pole 73 between two positions.

With such a structure, when the headless main body 4 is rotated in the front-rear direction, the support member 62 is rotated around the first rod 65 together with the headless stay 63, so that the pole 73 and the ratchet 72 are meshed with each other. The position switches sequentially. Thereby, the front-back position adjustment of the headless main body 4 is performed. Further, when the headless main body 4 is rotated to the maximum forward, the support member 62 is rotated around the first rod 65 together with the headless stay 63, and is brought into contact with the stopper 75, so that the pole 73 and the ratchet 72 are connected. The mesh is released. The disengagement between the pawl 73 and the ratchet 72 is held by the action of the turnover spring 74. As a result, the headless stay 63 is automatically tilted by the urging force of the spring 77 arranged between the first rod 65 and the bracket 61, and the headless main body 4 is positioned on the back side of the seat back 3. This is the state (state indicated by the chain double-dashed line in FIG. 6). At this time, the pole 73 comes into contact with the stopper 76, and the action of the turnover spring 74 brings the pole 73 and the ratchet 72 into a meshed state again. Further, when the headrest main body 4 is rotated forward from the inclinable state, the meshing positions of the pole 73 and the ratchet 72 are sequentially switched, and the headrest main body 4 is in the normal state (the seat back 3 that can support the head of the occupant. Return to the upper position).

[0021]

According to the present invention, the headless stay is movable with respect to the support member, and is rotated together with the support member by the rotation of the support member. This makes it possible to rotate and move the headless stay with a simple structure including only the support member without requiring many components such as guide rails. Further, since the locking mechanism is composed of the first and second slots and the rod, the number of parts is small and the locking mechanism can be simple. Further, since the locking mechanism is composed of the ratchet and the pole, it can also be used as a front-back position adjusting mechanism of the headless stay.

[Brief description of drawings]

FIG. 1 is a perspective view of a rear seat that employs a headrest device according to the present invention.

FIG. 2 is a perspective view of a headless device according to the present invention.

FIG. 3 is a side view of FIG.

FIG. 4 is a perspective view corresponding to FIG. 1 showing the operation of the rear seat that employs the headrest device according to the present invention.

FIG. 5 is a perspective view corresponding to FIG. 2 showing a modified example of the first locking mechanism adopted in the headless device according to the present invention.

6 is a view on arrow A in FIG.

[Explanation of symbols]

 61 Bracket (fixing member) 62 Support member 63 Headless stay 64 First locking mechanism (locking mechanism) 68 First slot 69 Second slot 66 Second rod 72 Ratchet 73 Pole

Claims (3)

[Claims] 1. A fixing member, a support member rotatably and movably supported by the fixing member, a headless stay movably supported by the support member, the fixing member and the support member. And a locking mechanism which is disposed between the support member and allows or restricts the rotational movement of the support member. 2. The lock mechanism includes a first slot formed on the fixing member to allow movement of the support member, and a locking member formed on the fixing member continuously with the first slot to allow movement of the support member. And the second slot to
2. The headless device according to claim 1, further comprising: a rod provided on the support member and slidably inserted into the first slot and the second slot. 3. The headless apparatus according to claim 2, wherein the locking mechanism includes a ratchet provided on the fixing member and a pole supported by the support member and meshing with the ratchet.