JPS61146649A - Device for varying shape of seating surface of automobile seat - Google Patents

Abstract

PURPOSE:To securely hold a seating person on a seat in running, and make it easy to get off a car, by designing to lift and lower an upper surface of a laterally intermediate portion of a seat cushion provided with projecting side support portions at both sides thereof. CONSTITUTION:A seat cushion 10 is constituted of a seat frame 12, a seat pad 13 supported on the seat frame 12, and an outer cover 15 covering the seat frame 12 and the seat pad 13. Side support portions 16 for holding a seating person are projected at both sides of the seat cushion 10. The seat pad 13 is constituted of a body portion 18 forming an outer periphery of the seat cushion 10 and a central portion 19 surrounded by the body portion 18. A jack 21 is supported through a bracket 20 to a seat rail 3, and a lifting seat plate 26 is mounted to a screw 25 to be rotated by a DC motor 24. The central portion 19 is supported on the lifting seat plate 26. Thus, an upper surface of the laterally intermediate portion of the seat cushion 10 may be lifted and lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for changing the shape of a seating surface of an automobile seat, which allows the user to smoothly get off the seat.

(Prior Art*) Generally, a car is provided with a seat, and the seating surface of the seat is formed on the upper surface of the seat cushion (for example, Japanese Utility Model Application Publication No. 57-181639).

In the above configuration, the seat may be configured in a packet shape in order to more reliably hold a seated person on the seat while the vehicle is running.

That is, in this seat, side support portions are provided protruding from both sides in the width direction of the seat cushion so that the seated person can be held by sandwiching the seated person from both sides.

(Problems to be Solved by the Invention) By the way, the above-mentioned packet-shaped seat prevents the seated person from swaying sideways while the vehicle is running, and securely holds the seated person on the seat. When attempting to get off the seat, the seated person must climb over the side support portions with his or her buttocks fitted into the center portion of the seat in the vehicle width direction. Therefore, there is a problem in that the function of the side support section for holding the seated person actually obstructs the movement of the seated person when getting out of the vehicle.

(Purpose of the Invention) This invention was made in view of the above-mentioned circumstances, and aims to securely hold a seated person on the seat while the vehicle is running, while also making it easy for the occupant to get off the vehicle. The purpose is to

(Structure of the Invention) A feature of the present invention for achieving the above object is that a seat cushion for an automobile is provided with protruding side support portions on both sides in the width direction of the seat cushion so that a seated person can be held between both sides. In the seat, the upper surface of the middle part in the width direction of the seat cushion can be raised and lowered freely.

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

In FIGS. 1 and 2, 1 is a vehicle interior floor of an automobile, and a vehicle seat 2 is provided on this vehicle interior floor 1. In FIG. This seat 2 is supported on the vehicle interior floor l via a pair of left and right seat rails 3 so as to be movable in the front and rear directions.

Each of the seat rails 3 is comprised of a lower rail 5 screwed to the vehicle interior floor 1, and an upper rail 6 attached to the seat 2 and movable back and forth guided by the lower rail 5. Further, the seat 2 has a seat cushion 10 supported by the seat rail 3, and a seat pack 11 supported at the rear of the seat cushion 1O.

The seat cushion 10 includes a seat frame 12 and a seat pad 13 supported on the seat frame 12.
and an outer skin 15 that covers the seat frame 12 and the seat pad 13.
Side support portions 16.16 are protrudingly provided on both sides of the seat to hold the seated person therebetween.

In the above configuration, the upper surface of the middle portion in the width direction of the seat cushion IO is movable up and down. This configuration will be explained below.

The seat pad 13 is composed of a seat hat body 18 such as a side support part 16 that forms the outer edge of the seat cushion 10, and a disk-shaped seat pad center part 19 that forms the center part of the seat cushion 10. Further, the outer skin 15 corresponding to the outer edge of the seat pad center portion 19 is formed of a stretchable annular rubber plate 15a.

Meanwhile, a jack 21 is supported on the upper rail 6.6 via a bracket 20. This jack 21 is D
C motor 24 and screw 2 rotated by this DC motor 24
5, and the seat pad central portion 19 is supported on an elevating seat plate 26 screwed to this screw 25.

Then, the elevating seat plate 26 is raised and lowered by the rotation of the screw 25 due to the forward and reverse rotation of the DC motor 24, and accordingly, the upper surface of the intermediate portion in the width direction of the seat cushion 10 can be raised and lowered.

Referring to FIG. 3, a circuit for controlling the DC motor 24 will be explained.

27 is a door switch, 28 is a key switch, and 29 is a digital vehicle speed meter, and a vehicle speed zero determination circuit 30 is connected to this digital vehicle speed meter 29.

Then, a signal indicating that the key switch 28 is OFF (off), that is, a signal indicating that the engine (not shown) is in the traction state, and a signal indicating that the vehicle speed zero discriminating circuit 30 is zero, are inputted into an OR operation. A circuit 31 is provided. Further, an AND circuit 32 receives a signal indicating that the door switch 27 is OFF, that is, a signal indicating that an automobile door (not shown) is open, and the output signal of the OR circuit 31. is provided.

Reference numeral 33 denotes a drive circuit connected to the DC motor 24, into which the output signal of the AND circuit 32 and a signal indicating that the key switch 28 is ON are input.

According to the above configuration, if the engine is in a stopped state or the vehicle speed is zero, and the door is in an open state, it is determined that the seated person is in a state to get off the seat 2, and the drive circuit 33 is activated. The DC motor 24 is driven to rotate normally, and the upper surface of the central portion of the seat cushion 10 in the vehicle width direction is raised in order to reduce the height difference with the side support portions 16°16.

Also, when the engine is in the driving state, side sabot)s
16.16, it is determined that the seated person should be held on the seat 2, the DC motor 24 is driven in reverse via the drive circuit 33, and the center portion of the seat cushion 10 in the vehicle width direction is lowered.

Next, the digital vehicle speed meter 29 and the vehicle speed zero determination circuit 30 will be explained in more detail.

The numerical display section of this digital vehicle speedometer 29 is composed of segments of a plurality of light emitting diodes 36, and is a three-digit number. Two segments of light emitting diodes 36 are placed in the hundreds place 37 of the number, and seven segments are placed in each of the tens place 38 and the ones place 39 of the number. Then, each light emitting diode 36, which has been programmed in advance with an input signal from a vehicle speed sensor (not shown), is turned on, and the vehicle speed is displayed as a numerical value.

The vehicle speed zero determination circuit 30 includes the light emitting diode 36.
In the figure, each segment indicated by numerals 41 to 44 is O.
FF (off) signal and segment 4
A to input a signal indicating that 5 is ON.
An ND circuit 46 is provided, and the output signal of this AND circuit 46 is used as a signal indicating zero vehicle speed.

(Effects of the Invention) According to the present invention, side support portions are provided on both sides of the seat cushion in the width direction so that the seated person can be held by sandwiching the seated person from both sides. , held securely on the sheet.

In this configuration, the upper surface of the middle part in the width direction of the seat cushion is made to be able to rise and fall freely, so when a seated person wants to get out of the vehicle, the upper surface of the middle part of the seat in the vehicle width direction is raised and the upper surface of the center part and the side support are raised and lowered. It is possible to reduce the height difference between the two sections. Therefore, the seated person can easily move his or her buttocks in the vehicle width direction of the seat cushion, and therefore, the seated person can easily get out of the vehicle.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front sectional view of the seat cushion, Fig. 2 is a perspective view of the seat, Fig. 3 is a control circuit diagram, and Fig. 4 is an electric block of the vehicle speed zero discrimination circuit 30. It is a diagram. 2. Seat, 10. Seat cushion, 16. Side support section, 21. Jacket.

Claims (1)

[Claims] 1. An automobile seat in which side support portions are provided on both sides of the seat cushion in the width direction so as to hold a seated person therebetween, characterized in that the upper surface of the intermediate portion in the width direction of the seat cushion is movable up and down. A device for changing the shape of the seating surface of an automobile seat.