JPH05329035A - Headrest device for vehicular seat - Google Patents

Abstract

PURPOSE:To improve operability in expanding the forward field of view for a person on a rear seat through the collapse and erection of a collapsible headrest on the upper end of a seat back via the application of a simple structure. CONSTITUTION:A headrest 10 assembled into the upper end of a seat back to support the back of a seated person in erect state is constituted of a front block body 12 for supporting the back of the person's head and a rear block body 13 for protecting a person on a rear seat. The lower ends of the block bodies 12 and 13 are pivotally supported on the front and rear end sections of a fixing link lever 21 laid on the upper end of a headrest stay 20 erected on the upper end of a seat back, in such a way as capable of free turn. Also, the upper ends of the block bodies 12 and 13 are jointed to each other with both ends of a movable link lever 23 pivotally supported in such a way as capable of free turn. In addition, an externally operable lock mechanism 25 is provided for jointing the block bodies 12 and 13 to each other, when the block bodies 12 and 13 are erected on the upper end of the seat back in combination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest device for a vehicle seat, and more particularly to a retractable headrest device in which a headrest is provided at the upper end of a seatback so as to be able to fall and stand in the front-rear direction.

[0002]

2. Description of the Related Art Generally, a vehicle seat or the like keeps a seated person stable while the vehicle is running, gives a proper sitting comfort, and fatigues the seated person for a long time. It is desired to reduce the load as much as possible. Therefore, various support devices are attached to each part of the seat. Most commonly as such a support device, there is a headrest attached to the upper end of the seat back so as to support the back side of the head of the seated person.

By the way, as such a headrest, various types of headrests have been conventionally known, for example, a seat.
A front / rear position adjusting type in which a headrest supported by a headrest stay protruding from the upper end of the tuck is provided so as to be movable in the front-rear direction of the seat is also known. With such a movable headrest structure, the feeling of the seated person can be further improved.

Further, in recent years, in this type of vehicle seat, a headrest used for a front seat of the vehicle seat is constructed so that it can be laid down or erected in the front-rear direction, and the headrest is used as a rear seat when the seat is laid down to the front side. A structure for enlarging the front field of view of a seated occupant and ensuring that state has been already proposed in, for example, Japanese Utility Model Publication No. 3-44594.

To briefly explain this, this conventional headrest device is provided with front and rear block bodies obtained by dividing the headrest into two parts, a front part and a rear part, and an upper end part of a headrest stay that is erected on the upper end part of the seat back. The lower end of the rear block is rotatably supported, and the upper end of the front block is rotatably supported on the upper end of the rear block. By locking the portion by the lock mechanism provided at the upper end of the headrest stay, both block bodies can be erected at the upper end of the seat back in a state of being combined with each other, and a function as a headrest can be exerted. It had been.

[0006]

However, in the above-described headrest device having the conventional structure, the locking mechanism is used when the front and rear block bodies are laid down to the front of the seat to expand the visual field in front of the seat of the rear occupant. After removing and rotating the front block body once, it is tilted forward together with the rear block body around the pivotal support on the stay. It caused a problem of poor sex.

That is, in the above-described conventional apparatus, the front and rear block bodies are in a disjointed state in which one end side is pivotally supported by releasing the lock mechanism, and in this state, both block bodies are pushed forward to the seat back. It requires a troublesome operation of tilting forward, and it is desired to take some measures capable of solving such a problem.

The present invention has been made in view of the above circumstances, and it is simply constructed with the minimum necessary number of constituent parts, and the headrest is erected or laid down at the upper end of the seat back so that the front of the rear occupant can be prevented. It is an object of the present invention to obtain a headrest device for a vehicle seat that can expand the field of view as necessary and can perform the standing and falling operations extremely easily.

[0009]

A headrest device for a vehicle seat according to the present invention comprises a headrest that is assembled to an upper end portion of a seatback and supports a back surface of a head of a seated person in a standing state. A fixed link that is composed of a front block body that supports the vehicle and a rear block body that protects the occupants of the rear seats.The lower ends of the front and rear block bodies are provided at the upper end of the headrest stay that is erected from the upper end of the seat back. The lever is pivotally supported at the front and rear ends of the lever, and the upper ends of the front and rear block bodies are connected by pivotally supporting both ends of the movable link lever. An externally operable lock mechanism is provided to connect the rear block bodies to each other when the rear block bodies are combined with each other at the upper end of the seat back to be erected.

[0010]

According to the present invention, the lock mechanism is unlocked in the headrest in the upright state, and the front and rear block bodies are pressed to the front of the seat, so that the respective block bodies are fixed and movable. It is possible to rotate the respective shaft support portions and to integrally swing the two block bodies and swing them in the seat front-rear direction to bring them into a lying state by leaning forward. In addition, by pressing the two block bodies so as to lift them toward the rear of the seat, swinging them integrally and interlocking them so as to overlap each other, standing up at the upper end of the seat back, and locking the lock mechanism, It is possible to return to the state of.

[0011]

1 to 4 show an embodiment of a headrest device for a vehicle seat according to the present invention. In these figures, a retractable headrest shown by reference numeral 10 is shown in FIG. As is clear from a), (b) and (c), front and rear block bodies 12 and 13 are provided which are connected by a link mechanism 11 so as to oscillate with each other.

Here, as is apparent from FIG. 4, the front block body 12 is a seater (not shown) seated on the seat back 1 of the vehicle seat, which is a front seat of which the entire illustration is omitted.
As shown in FIG. 1 and the like, it is composed of a front frame 14 and a pad 15 with a skin material 15a.

Further, the rear block body 13 protects the occupant 3 on the rear seat 2 as shown in FIG. 4, and as is clear from FIG. 1 and the like, the rear frame 16 and the skin material 1 are provided.
And a pad 17 with 7a.

The above-mentioned front and rear block bodies 12, 1
3, the front and rear frames 14 and 16 and the pad 1
As is clear from FIG. 1 and FIG. 3, the engaging claws 14a, 14a; 16a, 16a cut and raised from the parts of the frames 14, 16 to the outside and the mounting flange portion 1 are clear.
4b, 14b; 16b, 16b are the pads 15, 1
7 are integrally assembled by engaging portions 15b, 15b; 17b, 17b by insert wires provided by insert molding and mounting flange portions 15c, 15c; 17c, 17c. That is, the engaging claws 14a and 16a
Is hooked and locked by the engaging portions 15b and 17b, and the flange portions 14b and 16b; 15c and 17c are superposed and fastened and fixed by the bolts 18,
It is integrated.

According to the present invention, as is clear from FIGS. 1 to 3, the vehicle seat used as the front seat of the vehicle is assembled to the upper end of the seat back 1 and is normally seated in a standing state. Headrest 10 that supports the back of the person's head
The front and rear end portions of the left and right fixed link levers 21 and 21 provided on the upper end portion of the headrest stay 20 that is erected from the upper end portion of the seat back 1, with the lower end sides of the front block body 12 and the rear block body 13 constituting The lower shaft support portions 22a, 22b
The front and rear block bodies 12 and 13 are rotatably supported by the left and right movable link levers 2.
Both ends of 3, 23 are connected to each other by pivotally supporting them via upper shaft supporting portions 24a, 24b, and the front and rear block bodies 12, 13 are combined at the upper end portion of the seat back 1 to stand up. Both block bodies 1
It is characterized in that an externally operable lock mechanism 25 for connecting 2 and 13 is provided.

The frame 1 corresponding to the upper and lower shaft supporting portions 24a, 24b; 22a, 22b described above with reference to FIG.
4, 16 are designated by the same reference numerals, and the shaft holes on the side of the link levers 21, 23 pivotally supported by these are designated by 21a, 21b; 23a, 23b in FIG. There is.

Further, in the present embodiment, as the above-mentioned lock mechanism 25, the wire locking portion 26 is provided inside the front frame 14, and the locking claw 27a has the claw portion 27a selectively locked and locked thereto. The lever 27 is fixed to a lock shaft 29 rotatably supported by shaft holes 28a formed in the left and right of the rear frame 16.
Here, 30 in FIG. 3 is a bracket for holding the lock shaft 29 inside the rear frame 16, 31 is fixed to the outer end of the lock shaft 29 to lock and unlock the lock claw lever 27. It is an operation lever that is rotated to.

With such a structure, the headrest 1 in the standing state as shown in FIG. 2 (a).
At 0, the lock mechanism 25 is unlocked from the outside by the operation lever 31, and the front and rear block bodies 12 and 13 are pressed to the front side of the seat. As is clear from (c), the fixed link lever 21 and the movable link lever 23 are pivoted by the shaft support portions 22a, 22b; 24a, 24b, respectively, and the two block bodies 12, 13 are integrally interlocked. By swinging the seat in the front-rear direction, it becomes possible to bring the seat into a lying state.

Further, as shown in (c) to (b) and (a) of FIG. 2, the two blocks 12 and 13 are pressed against each other so as to be lifted to the rear of the seat so that they are integrated. By interlocking with each other, combining them so as to overlap each other, standing up at the upper end of the seat back 1, and further locking the lock mechanism 25 with the operation lever 31,
The original standing state can be restored.

With such a construction, in the state shown in FIG. 1 and FIG. 2A in which the headrest 10 is erected, the headrest serves as a headrest for supporting the back surface of the seated person's head on the seat. In addition to being able to exert its function,
As shown in (c) and FIG. 4, when the vehicle is laid on the front side of the seat, the front field of view of the rear occupant 3 can be enlarged and secured as shown by W in the figure, and its advantage is clear. Ah

Further, the standing of the headrest 10 as described above,
The fall is easily obtained in a required state by the front block body 12 and the rear block body 13 that are integrally moved by linking with the link mechanism 11, and there is also an advantage that the operation is extremely simple.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part including the headrest 10 and the seat back 1 can be freely modified or changed as necessary. . For example, the front and rear block bodies 12,
13, frames 14 and 16 and pads 14 and 17
As a lock structure 25 that can be externally operated, the structure for coupling with
Various modifications are conceivable.

[0023]

As described above, according to the headrest device for a vehicle seat according to the present invention, the headrest that is assembled to the upper end of the seatback and supports the back surface of the head of the seated person in the standing state is provided. It consists of a front block body that supports the back of the head and a rear block body that protects the occupants of the rear seats.The lower end sides of these front and rear block bodies are provided at the upper end of the headrest stay that stands from the upper end of the seat back. In addition to rotatably supporting the front and rear ends of the fixed link lever, the upper ends of the front and rear block bodies are connected by rotatably supporting both ends of the movable link lever. Moreover, since a lock mechanism that can be operated externally is provided to connect the front and rear block bodies to each other when the front and rear block bodies are combined at the upper end portion of the seat back to be erected, a simple structure is provided. Nevertheless, it is possible to operate the front and rear block bodies in an integrated manner by a link mechanism of fixed and movable link levers, which constitutes a retractable headrest that is erected and laid down. Since the fall operation can be performed only by locking and unlocking the lock mechanism and pressing either the front or rear block body, there is an excellent effect that the operability can be greatly improved compared to the conventional case.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of a headrest device for a vehicle seat according to the present invention.

FIG. 2 shows the movement of the headrest device shown in FIG.
Operation explanatory view shown in (b) and (c).

FIG. 3 is a schematic exploded perspective view showing a configuration of a main part of the headrest device shown in FIG.

FIG. 4 is a schematic view for explaining the function and effect of the headrest device according to the present invention.

[Explanation of symbols]

 1 Seat back of vehicle seat 2 Rear seat 3 Occupant to rear seat 10 Retractable headrest 11 Link mechanism 12 Front block body 13 Rear block body 14 Front frame 15 Pad 16 Rear frame 17 Pad 20 Headrest stay 21 Fixed link Lever 22a Shaft support 22b Shaft support 23 Movable link lever 24a Shaft support 24b Shaft support 25 Lock mechanism 26 Locking part 27 Lock claw lever 29 Lock shaft 31 Operation lever

Claims (1)

[Claims] 1. A headrest device for a vehicle seat, comprising a headrest assembled to an upper end portion of a seatback and supporting a backside of a head of a seated person in a standing state, wherein the headrest is a headrest of the seated person. A fixed link lever that is composed of a front block body that supports and a rear block body that protects the occupant of the rear seat, and the lower end sides of these front and rear block bodies are provided at the upper end of the headrest stay that stands upright from the upper end of the seat back. Is rotatably supported at the front and rear ends thereof, and the upper end sides of the front and rear block bodies are connected by rotatably supporting both ends of the movable link lever, and The rear block body is combined with the upper end of the seat back, and an externally operable lock mechanism is provided to connect the two block bodies when they are upright. Headrest device for vehicle seats.