JPS6236652Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automobile seat, and more particularly to an improvement of an automobile seat that has the function of rotating in a horizontal plane and changing direction.

Conventionally, automobile seats with a direction change function, which are used in so-called one-box cars, are
Since the planar shape of the seat cushion is approximately rectangular, the turning radius when changing direction is one half of the diagonal length of the rectangle, and each seat ( If three single-person seats are arranged closely in the width direction, it is impossible to establish a direction change function. For this reason, in the past, it was possible to change the direction by offsetting the center of rotation of each seat or by making the seat width considerably smaller than the interior width.
Therefore, it has been impossible to arrange three single-person seats, each with maximum space, and with a direction change function.

Furthermore, when a reclining mechanism is provided in an automobile seat equipped with a direction change function as described above, in order to be able to operate the reclining mechanism even when the direction is changed, it is necessary to install an operation mechanism at both ends in the width direction at the rear of the seat cushion. This was also one of the reasons why it was not possible to reduce the turning radius.

This invention was made in view of the above-mentioned problems, and the object is to provide an automobile seat in which each seat secures maximum space and is equipped with a direction change function.

The present invention is an automobile seat that has the function of rotating in a horizontal plane and changing direction, in which the seat cushion is formed by cutting out a corner on the rear end side; a rotary shaft that is movably arranged and whose axis is horizontal and in the seat width direction; a spoke that connects a seat bag to the rotary shaft and pivotally supports the seat back to the seat cushion via the rotary shaft; and,
The above object is achieved by providing a reclining device having a locking mechanism that is operated from the front side of the seat cushion and locks the seat bag at a plurality of angular positions of the seat bag with respect to the seat cushion.

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

As shown in the figure, in this embodiment, a seat cushion 2 and a corner portion of the rear end face are connected to a circular arc 3A, in an automobile seat 1 having a function of rotating in a horizontal plane and changing direction (not shown). 3B shape; and a rotating shaft 4 rotatably disposed at the center position in the width direction at the rear of the seat cushion 2, the axis of which is horizontal and in the seat width direction, and a seat back 5 attached to the rotating shaft 4. Connect the seat bag 5
spokes 6 which are pivotally supported to the seat cushion 2 via a rotation shaft 4; A reclining device 8 having a locking mechanism 7 for fixing the reclining device 8 is provided.

The rotation shaft 4 is disposed so as to pass through a pair of brackets 9A and 9B that are arranged in parallel in the width direction at the center of the seat cushion 2 near the rear end thereof, and is rotatably supported by the brackets 9A and 9B. .

The spokes 6 are plate-shaped bodies, and one end thereof is integrally connected to the rotation shaft 4 between the brackets 9A and 9B, so that the spokes 6 rotate around the rotation shaft 4. It is allowed to rotate. Reference numerals 10A and 10B in the figure indicate reclining stoppers, which restrict the rotation of the spokes 6 beyond a certain level, thereby changing the seat back 5 from its fully flat state as shown by the solid line in FIG. It is meant to be between the upright state and the upright state.

A spline shaft 11 is integrally and coaxially formed at the end of the rotating shaft 4 that projects outward from the bracket 9A.

A spline yoke 12 is provided on the outer side of the tip of the spline shaft 11 so as to be able to reciprocate within a certain range along the central axis of the spline shaft 11, and is detachable from the spline shaft 11. That is, this spline yoke 12 engages with a pair of opposing grooves in the spline shaft 11, thereby locking the spline shaft 11 and the rotating shaft 4 in their rotational positions.

A piston arm 13 coaxial with the spline shaft 11 is provided on the rear end side of the spline yoke 12.
are integrally provided. The piston arm 13 is axially movably supported by a cylinder 14 and urged in the direction of the spline shaft 11 by a return spring 15 disposed in the cylinder 14 .

That is, the spline yoke 12 is normally connected to the spline shaft 1 by the return spring 15.
1 and is biased to be in a position where it engages with 1.

A groove 16 is formed in the axially intermediate portion of the piston arm 13, and one end of a lock release lever 17 is engaged with the groove 16.

This lock release lever 17 is supported by a pin 19 so as to be swingable within a plane including the piston arm 13 at a position slightly rearward than the fixed bracket 18, and the other end is attached to the seat cushion 2.
It protrudes forward from the front, allowing the passenger to swing it.

Reference numeral 20 in the figure denotes a sleeve that is placed over the lock release lever 17, and 21 is formed integrally with the cylinder 14, and when the lock release lever 17 is operated, the sleeve 20 comes into contact with the sleeve 20, thereby causing the lock release lever 17 to rise above a certain level. Stoppers for regulating the swinging operation are shown.

Further, there is a groove between the groove 16 of the piston arm 13 and the tip of the lock release lever 17 so that the intersection angle between the piston arm 13 and the lock release lever 17 can be changed within a certain range when the lock release lever 17 is swung. A gap 22 is formed.

Next, the operation of the above embodiment will be explained.

Normal state, seat cushion 2 with seat back 5
In the state where the angle with respect to
A spline yoke 12 at its tip is engaged with a corresponding groove in the spline shaft 11. (1st
solid line position in the figure). Therefore, the spline shaft 11 and the rotating shaft 4 coaxial therewith are locked, and the seat back 5 is also locked in that position.

When changing the angle of the seat back 5, when the occupant operates the lock release lever 17 in the direction shown by the arrow 23 in FIG. It is displaced upward in FIG. 1 against the return spring 15, and thereby the spline yoke 12 is also moved upward and is disengaged from the groove of the spline shaft 11 (position shown by the two-dot chain line in FIG. 1). .

When the engagement between the spline shaft 11 and the spline yoke 12 is released, the spline shaft 11 and the rotation shaft 4 become rotatable, so the seat back 5 can be changed to a desired angular position, and the lock release lever 17 can be opened at that position. When the piston arm 13 is released, the return spring 15 moves the piston arm 13 downward in FIG. The position of the seat bag 5, which is connected to the seat bag through the spokes 6, is locked, and the reclining operation is completed.

In the case of this embodiment, since the rear end width direction corners of the seat cushion 2 are formed into circular arcs 3A and 3B, the rotation radius when changing the direction of the seat can be made small, and the reclining device 8
Since the locking mechanism 7 can be operated from the front side of the seat cushion, the rotation radius of the seat can also be reduced. Since the configuration is yoke 12,
There are advantages such as easy and reliable adjustment of the reclining angle of the seat back and simple structure.

In the above embodiment, the lock mechanism is composed of a spline shaft and a spline yoke that engages with the spline shaft, but the lock mechanism is designed so that the angle of the seat back 5 with respect to the seat cushion 2 can be adjusted at a plurality of positions. It is not limited to the configuration of the embodiment, as long as it is provided and can be operated from the front of the seat.

Therefore, for example, the positions of the spline shaft 11 and the spline yoke 12 may be exchanged, or a spline cylinder may be used instead of the spline yoke 12, or another engagement mechanism may be used.

Further, although the spokes 6 are plate-shaped bodies, they may be, for example, pipes or rod-shaped bodies. However, plate-shaped spokes have the advantage of being easy to process.

Furthermore, the shape of the rear end corner of the seat cushion is
As long as the rotation radius of the seat cushion is reduced, the shape may be a linear cutout or the like.

Since the present invention is configured as described above, it has the excellent effect that the upper seat can easily change direction while securing the maximum space within the allowable space, and can also be reclined.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view showing the main parts of an embodiment of the automobile seat according to the present invention, and Fig. 2 is a - of Fig. 1.
FIG. 3 is an enlarged cross-sectional view taken along the line. 1...Car seat, 2...Seat cushion, 3A, 3B...Circular arc, 4...Rotation axis, 5...
Seat back, 6... Spoke, 7... Lock mechanism, 8... Reclining device, 11... Spline shaft, 12... Spline yoke, 17... Lock release lever.

Claims (1)

[Scope of utility model registration request] In an automobile seat having the function of rotating in a horizontal plane and changing direction, the seat cushion is formed by cutting out both corners of the rear end;
A rotating shaft is rotatably disposed at the center position in the width direction at the rear of the seat cushion, and the axis is horizontal and in the width direction of the seat; a seat bag is connected to the rotating shaft, and the seat bag is attached to the seat cushion. A reclining device is provided, which has a spoke that is pivotally supported via the rotation shaft, and a locking mechanism that is operated from the front side of the seat cushion and fixes the seat back at a plurality of angular positions with respect to the seat cushion. An automobile seat characterized by: