JPH0537705Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a vehicle seat that can be largely changed in direction for getting on and off.

"Conventional technology" Conventional vehicle seats include, for example,
-There is one disclosed in Publication No. 152349.

That is, the publication states that the upper base and the lower base constitute a rotational support unit, the seat is rotatably supported by this rotational support unit, and a drive mechanism section using a planetary gear mechanism is installed beside the rotational support unit. What is provided is disclosed.

``Problem to be solved by the invention'' However, in such conventional vehicle seats, the drive mechanism is provided in a narrow space beside the rotation support unit, making it complicated and expensive, and requiring a lot of man-hours for installation. There were problems in that it was not only bulky and expensive, but also structurally flimsy and fragile.

The present invention was devised in view of these conventional problems, and aims to provide a vehicle seat that is strong and rigid and is cost-reduced.

``Means for Solving the Problems'' The gist of the present invention to achieve the above purpose is to provide a vehicle seat that can change direction significantly for getting on and off, by connecting a lower base installed on the floor and the seat. The supporting upper base is mutually rotatably combined by a ring-shaped flange provided on one side and a ring-shaped groove provided on the other side so as to fit into the ring-shaped flange to constitute a rotation support unit, One of the lower base and the upper base is provided with a rotary arm that rotates concentrically around the rotation center thereof, and a drive section thereof, and a drive mechanism section that connects the tip of the rotary arm is provided on the outer periphery of the other base. The characteristics of the vehicle seat include:

"Operation" The seat is supported by the upper base of the rotation support unit, and when the ring-shaped flange and ring-shaped groove that are fitted together slide against each other, the upper base rotates with respect to the lower base, The seat is rotatable about a substantially vertical axis.

The rotation is powered by a drive mechanism. A drive mechanism having a rotating arm is provided on one of the upper base and the lower base, and the tip of the rotating arm is connected to the other, so when the rotating arm is rotated by the driving unit, the other rotates with respect to the one. Rotationally driven.

The upper and lower bases rotate relative to each other, causing the seat to change direction.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

Each figure shows one embodiment of the present invention.

As shown in FIGS. 2 and 3, the vehicle seat 10 is installed as a front seat of an automobile, and can be largely changed in direction for getting on and off the vehicle.

The seat 11 of the vehicle seat 10 is supported by a rotary support unit 20 so as to be able to rotate and change direction, and is installed on the floor F via a seat slide 15 below the rotary support unit 20.

As shown in FIGS. 1 and 4, the lower base 21 of the rotary support unit 20 has a trapezoidal support portion 22 projecting upward from the base surface 21a to which the seat slide 15 is attached, and slides into contact with the top of the trapezoidal support portion 22. A surface 23 is provided.

A ring-shaped holding plate 24a is fixed to the top surface that is one step higher than the sliding contact surface 23 so as to protrude above the sliding contact surface 23, and the sliding contact surface 23 and the holding plate 24a are fixed.
A ring-shaped groove 24 is formed between the two.

The upper base 25 is connected to the seat portion 11 of the vehicle seat 10.
A platform 2 having an inverted trapezoidal cross section and having a ring-shaped flange 28 at the tip is mounted on the base surface 26 on which the
7 is fixedly installed so as to protrude downward.

The ring-shaped flange 28 of the upper base 25 fits into the ring-shaped groove 24 between the holding plate 24a and the sliding surface 23 of the lower base 21, so that the upper base 25 is attached to the lower base 21 about an approximately perpendicular axis. It is pivoted so that it can rotate smoothly.

A drive mechanism section 30 is provided between the lower base 21 and the upper base 25.

The drive mechanism section 30 includes a drive section 31 mounted on the lower base 21 and a rotating arm 35 that is rotated by the drive section 31 and swings around.

The drive section 31 is mounted at the center of the top surface 23a of the lower base 21, which is one step higher than the sliding surface 23, and is formed by combining an electric motor 32 and a speed reduction section 33.

As shown in FIG. 5, the reduction unit 33 includes a first worm 33a fixed to the output shaft 32a of the electric motor 32, a first worm wheel 33b meshing with the first worm 33a, and a first worm wheel 33b.
It consists of a second worm wheel 33c that rotates integrally with the second worm wheel 33c and a second worm wheel 33d that meshes with the second worm wheel 33c, and an output shaft 34 is fixed at the center of the second worm wheel 33d. The output shaft 34 is concentric with the rotation center of the upper base 25.

The rotary arm 35 has a base fixed to the output shaft 34 of the speed reducer 33, and a distal end extending around the outer periphery of the upper base 25 is pivotally connected to the base surface 26 by a pivot pin 36.

Next, the effect will be explained.

The vehicle seat 10 has a deceleration section 3 of a drive mechanism section 30.
Since 3 is a large reduction ratio, when the electric motor 32 is stopped, it is stopped at the rotational position due to the resistance of the power transmission system.

The position of the bottom portion 11 can be adjusted back and forth by moving the lower base 21 of the rotary support unit 20 back and forth using the seat slides 15, 15.

When getting on or off the vehicle, the upper base 25 supporting the seat part 11 is rotated with respect to the lower base 21 of the rotary support unit 20 to change the direction of the seat part 11 to the outside of the vehicle.

To rotate the seat portion 11 to change direction, the electric motor 32 of the drive mechanism portion 30 is activated by an operation switch (not shown).

The rotation of the electric motor 32 is greatly decelerated by the first worm wheel 33b, the first worm wheel 33b, the second worm 33c, and the second worm wheel 33d of the deceleration unit 33,
The output shaft 34, which is the pivot of the second worm wheel 33d, swings around and rotates at an appropriate speed.

The driving mechanism 30 having the rotating arm 35 is provided on the lower base 21, and the tip of the rotating arm 35 is connected to the base surface 26 of the upper base 25. Therefore, when the rotating arm 35 is rotated by the driving unit 31, the upper base 25 is rotated by the lower base 21.
is rotated relative to the

The upper base 25 and the lower base 21 rotate relative to each other, and the seat 11 changes direction.

When the vehicle seat 10 is in the desired rotational position and the operating switch is released, the power supply is cut off and the electric motor 32 is stopped. When the electric motor 32 stops, the seat 11 is held in that position in the same manner as described above.

Note that the drive mechanism section can be provided on either one of the lower base and the upper base and the other,
Whichever is convenient is fine.

Further, the ring-shaped flange and the ring-shaped groove may be provided in the lower base with the vertical relationship reversed, and the ring-shaped groove may be an inward groove instead of an outward facing groove.

"Effects of the Invention" According to the vehicle seat of the present invention, since a drive mechanism section with a simple structure using a drive section is provided, it has high strength, rigidity, and durability, and allows the vehicle seat to rotate smoothly. The mechanism can be moved and stopped in a small amount of space, and the mechanism can be stored in a small space, making it smaller and lighter and reducing costs.

[Brief explanation of drawings]

Each figure shows an embodiment of the present invention. Figure 1 is an exploded perspective view of a vehicle seat, Figure 2 is a plan view of the seat installed in a vehicle, and Figure 3 is a side view and a side view. FIG. 4 is a sectional view taken along the line taken in FIG. 1, and FIG. 5 is a perspective view of the speed reduction section of the drive mechanism section. 10...Vehicle seat, 11...Seat portion, 20...
Rotation support unit, 21... lower base, 24...
...Ring-shaped groove, 25... Upper base, 28... Ring-shaped flange, 30... Drive mechanism section, 31...
Drive unit, 32... electric motor, 33... reduction unit,
34...Output shaft, 35...Rotating arm.

Claims (1)

[Scope of Utility Model Registration Claim] A vehicle seat whose direction can be changed significantly for getting on and off, a ring-shaped flange having a lower base installed on the floor and an upper base supporting the seat on one side; A ring-shaped groove provided on the other side so as to fit into the ring-shaped flange is combined so as to be rotatable with each other to constitute a rotation support unit, and a ring-shaped groove is provided on one of the lower base and the upper base concentrically with the center of rotation thereof. 1. A vehicle seat, comprising: a rotary arm that rotates; and a drive section thereof; and a drive mechanism section connected to the tip of the rotary arm on the outer periphery of the other arm.