JPH0443083Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat for seating a passenger provided in a vehicle such as an automobile.

[Background Art] An automobile seat is provided with a headrest at the top of the seat bag. This headrest is for supporting the occupant's head, and can be adjusted vertically and longitudinally depending on the occupant's physique and driving posture. Generally, this headrest is performed by changing the length of the stay inserted into the seat bag.

Therefore, if this headrest is placed in a high position, a gap will be created between it and the upper end of the seat bag. Furthermore, when the seatback is folded down until it is flush with the rear seat base, the headrest must be removed.
Further, when no passenger is seated in a seat other than the driver's seat, the driver's field of view can be widened by removing the headrest, but this removal also has to be done manually, making the operation complicated.

The present invention takes the above facts into consideration and aims to provide a vehicle seat that can change the effective area of the seat body.

[Summary and operation of the invention] The present invention provides an extension section in which the flexible skin of the seat body is extended, a U-shaped guide rail for guiding this extension section, and a U-shaped guide rail interposed between the extension section and the guide rail. and a driving means for moving the guide rail along the seat body to change the effective seat area of the extension. .

Therefore, in the present invention, when the guide rail is moved along the seat body by the driving means, the bent end of the extension part and the bent part of the guide rail are moved relative to each other by the engaging means. As a result, the effective seat area of the extension is changed. When the guide rail is moved in the direction of pulling it out from the seat body, the extension part that was previously in the U-shaped bent part of the guide rail forms a continuous seat surface with the main body and expands the seat surface.
Conversely, when the guide rail moves in the direction of being drawn into the seat body, the part of the extension that was the effective seat surface gradually moves to the bent part of the guide rail, thereby reducing the effective seat area. Ru.

[Embodiment of the invention] As shown in FIG. 1, in the vehicle seat 10 of this embodiment, a seat cushion 12 forms a seating surface for the occupant, and a seat back 14 serves as a backrest for the occupant.

The seat back 14 has a skin made of a flexible, thick-walled synthetic resin.

A part of the skin disposed at the upper end of the seat bag 14 forms an integrally extended extension 16. This extension part 16 is bent at the middle part in the longitudinal direction to form an inverted U shape, and as shown in FIG. 3, flexible mounting plates 17 are attached to the inner circumference of both sides in the vehicle width direction. A plurality of engagement protrusions 18 protrude from the mounting plate 17. These engagement protrusions 18 have enlarged T-shapes at their protruding tips, and are guided by U-shaped guide rails 20 .

That is, a pair of U-shaped guide rails 20 are provided corresponding to both sides of the vehicle seat 10, and these are connected by a head protection connecting plate 22 having sufficient strength to support the head. There is. These U-shaped guide rails 20 have T-shaped grooves 24 for tightly accommodating the engagement protrusions 18, which are located at one end 24A at the front of the vehicle when installed.
The extension part 1 is inserted from the center and bent at the central bending part.
The tip of 6 extends toward the vicinity of one end 24B located at the rear of the vehicle.

Therefore, when the U-shaped guide rail 20 moves in the direction of insertion into the seat back 14, the engaging protrusion 18 passes from the one end 24A, through the central bent part of the T-shaped groove 24, toward the one end 24B (in the direction of arrow A). will be moving towards. Therefore, the straight portion of the extension 16 disposed between the central bent part of the U-shaped guide rail 20 and the seat back 14 becomes shorter, and the height of the extension 16 that projects as a headrest becomes lower (see Fig. 2). reference). Note that the tip end of the extension portion 16 is accommodated between the seat bag 14 and a back panel (not shown) attached to the seat bag 14.

Conversely, when the U-shaped guide rail 20 is pulled out from the seat bag 14, the extension part 16 moves from the center of the U-shaped guide rail 20 toward one end 24A, so that the flat part of the extension part 16 protruding from the seat back 14 The protrusion height is increased and can accommodate a large passenger.

A guide arm 28 projects from a portion of the U-shaped guide rail 20 and is guided by a slide rail 30 accommodated within the seat bag 14. This guide arm 28 has a rack gear 32 formed on one side thereof and meshes with a pinion 34.
This pinion 34 is fixed to the output shaft of a motor 38 attached to a seat back frame 36 that supports the slide rail 30 and the seat back 14. For this reason, the motor 38 moves the U-shaped guide rail 20 into the seat back 1 during its rotation.
4 and can be pulled into the seat bag 14 or pushed out from the seat bag 14.

Next, the operation of this embodiment will be explained.

If it is desired to increase the amount by which the planar portion of the extension portion 16 that functions as a headrest is projected after the occupant is seated, the motor 38 is driven. This causes the motor 38 to project the U-shaped guide rail 20 upwardly from the seat back 14 via the rack gear 32. Therefore, the guide arm 28, which had been on the one end 24B side, moves toward the other end 24A through the central bent part of the U-shaped guide rail 20.
The planar length of the extension 16 between the central bend of the U-shaped guide rail 20 and the seat back 14 is increased, thereby increasing the headrest substantially as shown in FIG.

Conversely, if the length of the headrest is to be reduced or eliminated, the U-shaped guide rail 20 that reverses the motor 38 is drawn into the seat back 14, so that the extension 16 gradually moves toward the one end 24B. , the plane portion integrally formed with the seat back 14 becomes shorter. Therefore, as shown in FIG. 2, the headrest is essentially housed in the seat bag 14, and there is no need to separately remove the headrest as in the conventional case.

Next, FIGS. 4 and 5 show a second embodiment of the present invention.

In this embodiment, the engaging protrusion 1 in the previous embodiment is
There are ribs 43 on the side of the mounting plate 17 to which 8 is attached.
are protruding in large numbers at predetermined intervals. This rib 43 is fixed to a bent portion 45 formed by wrapping around the side surface of the extension portion 16 . Also, U-shaped guide rail 2
A shielding plate 47 is provided which is attached between the parallel parts of the U-shaped guide rail 20 and moves up and down with the U-shaped guide rail 20. Thereby, the inside of the extension part 16 cannot be seen from the side of the extension part 16 bent in a U-shape.

Note that the present invention is applicable not only to the headrest of the seat, but also to changing the length of the seating surface, back surface, side supports, etc.

[Effects of the invention] As explained above, the present invention provides an extension of the flexible skin of the seat body, a U-shaped guide rail for guiding this extension, and a space between the extension and the guide rail. The present invention is effective because it has an engaging means that is interposed in the guide rail and engages the extension part in a relatively movable manner, and a drive means that moves the guide rail along the seat body to change the effective seat area of the extension part. It has an excellent effect of allowing the sheet area to be easily changed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the seat to which the first embodiment of the present invention is applied, Fig. 2 is a perspective view showing the state after the height of the headrest is adjusted, and Fig. 3 is a perspective view showing the state after the seat back is extended and the seat with the guide rail. FIG. 4 is an exploded perspective view showing the correspondence relationship, FIG. 4 is a sectional view of the extension part showing the second embodiment, and FIG. 5 is a perspective view showing the extension part engaging protrusion used in the second embodiment. 14... Seat back, 16... Extension part, 18
...Engaging protrusion, 20...U-shaped guide rail, 38
……motor.

Claims (1)

[Scope of utility model registration request] an extension of the flexible skin of the seat body;
a U-shaped guide rail for guiding the extension; an engaging means interposed between the extension and the guide rail for relatively movably engaging the extension with the guide rail; a vehicle seat, comprising: drive means for moving along the main body to change the effective seat area of the extension.