JPH085640Y2 - Vehicle seat rotation mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat rotation mechanism. More specifically, the present invention relates to a vehicle seat rotation mechanism. The present invention relates to a vehicle seat rotation mechanism in which a seat is mounted and the seat is rotationally adjustable.

[0002]

2. Description of the Related Art Conventionally, it has been desired for a vehicle seat or the like to be constructed so that the orientation of the seat can be changed and adjusted according to the preference and demand of a seated person. For example, the one having a structure in which a rotating mechanism such as a sliding type or a shaft-up rotating type is provided below the seat cushion on the floor surface of the passenger compartment
Various proposals have been made, including 61-63945.
That is, according to such a vehicle seat, a rotating mechanism including a lower base provided with a rotating rail and the like and an upper base is provided below the seat cushion and on the floor surface of the passenger compartment. Further, in this type of vehicle seat, it is also necessary to slide the entire seat in the front-rear direction of the seat in order to enhance the seating feeling. For this purpose, a slide mechanism including a linear slide rail is used. It is generally performed to interpose between the seat cushion and the upper side of the rotating mechanism.

[0003]

By the way, as described above, a problem with a vehicle seat in which a rotating mechanism and a sliding mechanism are laminated and arranged below a seat cushion is that a lower base of the rotating mechanism and a lower base of the rotating mechanism are used. There is a clearance for rotation with the upper base even when the rotation mechanism is locked, and this clearance causes play.
In particular, when a load is applied to the seat cushion side and the upper base does not maintain a horizontal state, one side of the lower base and the upper base is in an open state, which causes play. An object of the present invention is to provide a vehicle seat rotation mechanism that can easily rotate the upper base when the rotation mechanism is activated and can keep the rattling-free state when the rotation mechanism is locked. .

[0004]

The present invention has been made in view of the above-mentioned problems, and a bearing is disposed between the lower base and the upper base, and the upper base is clamped between the lower base and the lower base. The holder plate is fixed to the lower base, and an emboss for pressing the upper base is formed on the holder plate at positions corresponding to a plurality of locking positions of the upper base with respect to the lower base.

[0005]

According to the present invention, the upper base is clamped by the lower base and the holder plate fixed to the lower base, and the emboss is formed at a position of the holder plate corresponding to the locking position of the upper base. At the position, the upper base is pressed by the embossing of the holder plate toward the lower base side to prevent rattling, and at the rotation adjustment position other than the lock position, a clearance is formed between the upper base and the lower base, and The rotation can be easily adjusted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotating mechanism for a vehicle seat according to the present invention will be described in detail below with reference to the drawings. 1 to 3 respectively show an outline of one embodiment of the present invention. Only a seat cushion 2 is shown in a vehicle seat 1 shown in FIG. 1, and a seat cushion 2 is provided at a rear end side of the seat cushion 2. Is provided with a seat back. A rotation mechanism 11 and a slide mechanism 5 are provided below the seat cushion 2 of the seat 1 and between the seat cushion 2 and the floor surface of the vehicle compartment.

The rotating mechanism 11 comprises a lower base 12 mounted on the floor surface of the passenger compartment and an upper base 14 rotatably mounted on the lower base 12. A pair of left and right slide mechanisms 5 are provided on the upper base 14, and the rotation mechanism 11 is provided above the slide mechanisms 5.
Can also be provided. The slide mechanism 5 includes a movable rail 6 fixed to the seat cushion frame 2a,
A fixed rail 7 fixed to the upper base 14 of the rotating mechanism 11, a movable rail 6 is slidable in the front-rear direction along the fixed rail 7, and is locked by a conventionally known lock mechanism. ing.

As shown in FIGS. 1 and 2, the lower base 1
A ball-shaped bearing 16 is arranged between 2 and the upper base 14. Also, a holder plate 18 for sandwiching the upper base 14 with the lower base 12
Is fixed to the upper end of an upward flange 12a formed on the inner peripheral edge of the lower base 12 by a bolt 21 or the like. The bearing 16 may be formed of a rubber material having elasticity, or a synthetic resin material or a metal.

A rotation lock mechanism 23 is provided between the lower base 12 and the upper base 14 of the rotation mechanism 11 and rotates by 90 ° in a right angle direction, or 18 by way of example.
It is adapted to be locked by the rotation lock mechanism 23 at a rotational position of a half rotation of 0 ° or one rotation of 360 °. The rotation position can be variously formed by adjusting the lock position of the rotation lock mechanism 23, and as the rotation lock mechanism 23, a conventionally known one using a lock claw and a lock groove can be used.

An emboss 26 projecting downward is formed on the holder plate 18 in correspondence with a plurality of locking positions of the upper base 14 with respect to the lower base 12 by the rotation lock mechanism 23. An arcuate projection 28 is formed on the inner peripheral edge of the lock position of the upper base 14 so as to extend upward. In this embodiment, the holder plate 18 is provided with three embossings 26 and three arc-shaped projections 28 are formed on the upper base 14 in correspondence with the three embossings 26, but the present invention is not limited to this. Not something.

Therefore, as shown in FIG. 2, during operation of the rotating mechanism 11, the upper base 14 can rotate while maintaining an appropriate clearance with respect to the lower base 12, and as shown in FIG. At the lock position of the rotating mechanism 23, the arcuate projection 28 of the upper base 14 is pressed by the embossing 26 formed on the holder plate 18, and the upper base 14 presses the bearing 16.
There is no clearance for rotation, and play is prevented. The protrusion 2 formed on the upper base 14
It is also possible to omit 8 and directly press the upper surface of the upper base 14 by the embossing 26 of the holder plate 18. When the bearing 16 is made of an elastic material, the bearing 16 can be crushed.

FIGS. 4 and 5 show a modification of the present invention. The parts corresponding to those of the above-mentioned embodiment are designated by the same reference numerals and the detailed description thereof will be omitted. In place of the ball-shaped bearing 16, a cylindrical roller 31 made of an elastic body is arranged between the lower base 12 and the upper base 14. With such a configuration,
As in the embodiment described above, at the locked position of the upper base 14, as shown in FIG. 5, the embossing 26 of the holder plate 18 presses the arc-shaped projection 28 of the upper base 14, and the upper base 14 presses the cylindrical roller 31. Crush,
The clearance for rotation can be eliminated and play can be prevented.

[0013]

The structure of the vehicle seat rotation mechanism according to the present invention has been described above. According to this structure, the upper base is the lower base, and the holder plate is fixed to the lower base. The upper base is pressed to the lower base side at the lock position to prevent rattling, and at the other positions than the lock position because the emboss is formed at a position corresponding to the lock position of the upper base of the holder plate. At the rotation adjustment position of, a clearance is formed between the upper base and the lower base,
It is possible to easily adjust the rotation of the upper base, and obtain a vehicle seat rotation mechanism that is excellent in seating feeling.

[Brief description of drawings]

FIG. 1 is a sectional view of a vehicle seat rotation mechanism according to the present invention in a locked position.

FIG. 2 is a cross-sectional view of a rotation mechanism of the present invention at a rotation adjustment position.

FIG. 3 is an exploded perspective view of a rotation mechanism of the present invention.

FIG. 4 is a cross-sectional view showing a modified example of the present invention in a rotation adjusting position of a rotating mechanism.

5 is a cross-sectional view of the rotation mechanism of FIG. 4 in a locked position.

[Explanation of symbols]

 1 Seat 2 Seat Cushion 5 Slide Mechanism 6 Movable Rail 7 Fixed Rail 11 Rotation Mechanism 12 Lower Base 14 Upper Base 16 Bearing 18 Holder Plate 23 Rotation Lock Mechanism 26 Emboss 28 Protrusion 31 Cylindrical Roller

Claims (1)

[Scope of utility model registration request] 1. A vehicle seat rotation mechanism in which an upper base is rotatably mounted on a lower base mounted on the floor side of a passenger compartment, and a seat cushion is mounted on the upper base side so that the seat can be rotationally adjusted. , A bearing is arranged between the lower base and the upper base, and a holder plate for sandwiching the upper base between the lower base and the lower base is fixed to the lower base, and a plurality of locking positions of the upper base with respect to the lower base are provided. A rotation mechanism for a vehicle seat, wherein an emboss for pressing the upper base is formed on the holder plate at a corresponding position.