JPS6220737A - Motor seat for vehicle - Google Patents

Abstract

PURPOSE:To reduce shock of a seat upon stoppage by lowering the moving speed of the seat through control means upon detection of approach of the moving seat to a storing position. CONSTITUTION:During motion of seat cushion, a position detecting sensor 22 will detect the rotation of a motor 17. When a microcomputer 20 will count the rotation indicating arrival within predetermined distance, the input voltage will drop to decelerate the motor 17 gradually. Consequently, the passenger can recognize that the has approached to prestored position. When the microcomputer 20 will count the rotation corresponding with predetermined position, the shortcircuit is closed to stop the motor 17.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in electric vehicle seats.

(Prior art) Conventionally, a motor 1 for moving a vehicle seat (as shown in FIG. 4) is turned forward or reverse by turning on a switch 2 or 3, and the seat is moved back and forth by the motor driving force. An electric seat has been proposed (see Japanese Unexamined Patent Publication No. 58-49529).

There has also been proposed a control device that controls the sheet to be moved to a pre-stored position by operating a switch.

By the way, in the case of the above-mentioned electric seat, if the seat is moving at a high speed, the seat suddenly stops at the memorized position, which causes a large amount of stop movement, and also causes a sense of anxiety because the user does not know in which position it will stop. There was a problem.

(Object of the Invention) The present invention has been made in order to solve the above-mentioned conventional problems, and aims to reduce the shock when the seat is stopped and eliminate the feeling of anxiety in the seat Y stop position. It is.

(Structure of the Invention) Therefore, the present invention comprises: a switch means that outputs a signal to move the sheet to a pre-stored position; a position detection means that outputs a signal when the sheet F approaches the memorized position by a predetermined distance; A sheet driving motor for moving the sheet and a signal from the switch means drive a sheet driving monitor, and when a signal is issued from the position detecting means while the sheet is moving, the moving speed of the sheet F is slow. and a control means for controlling the rotational speed of the seat driving motor so that the seat driving motor has the following configuration.

(Effects of the Invention) According to the present invention, when the position detecting means detects that the moving seat approaches the memorized position (stop position), the control means controls the rotational speed of the motor to increase the moving speed of the sheet. Since it is designed to be slow, the shock when the seat stops is reduced.

Furthermore, since the moving speed of the seat slows down as it approaches the memorized position (stop position), it becomes possible to know in advance at which position the seat will stop, and the feeling of anxiety is alleviated.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the vehicle seat 10 is composed of a sheath bag 11 and a seat cushion 12, and the seat cushion 12 has an upper rail 14 fitted to a lower rail 13 fixed on the vehicle body 70. The seat cushion 12 is supported so as to be movable back and forth.

Each of the lower rails 13.13 is provided with a screw shaft 15.15, and each of the seven rails 14.14 is provided with a gear box 16.16 containing a gear or the like that meshes with each of the screw threads 15, 15. A seat drive motor 17 that drives built-in gears, etc. is connected to each gear box 16, 16, and the seat cushion 12 is automatically moved back and forth by forward and reverse rotation of the motor 17. Become.

The rotation speed of the motor 17 is variable in three steps by a slide switch 18 provided on the side of the seat cushion 12 or the armrest of the door. For example, at high speed H, the seat movement speed is 30 mm/ sec
, 20 ma+/sec at medium speed N, and 10 mm/see at low speed.

As shown in FIG. 1, the slide switch 18 is connected to a microcomputer 20 mounted on the vehicle.

The microcomputer 20 is provided with a set switch 21 for setting a memory position (stop position) registered in advance by the seated person.

For example, seated person A registers in advance a position AI 30 mm forward from the intermediate position between the front and back of the seat cushion 12, and seated person B registers in the microcomputer 20 a position B'' some from the intermediate position to the rear. When the set switch 21 is switched to the a side, the motor 17 rotates forward or backward by a predetermined number of rotations, and the seat cushion 12 is set to the storage position A. When the set switch 21 is switched to the b side, the motor 17 rotates at a predetermined number. Rotate forward or backward by a number of times,
The seat cushion 12 is now moved to the storage position B'.

Furthermore, a position detection sensor 22 for the seat cushion 12 is connected to the microcomputer 20 .

The sensor 22 is a rotation sensor that detects the number of rotations of the motor 17, and the microcomputer 20 counts this number of rotations, compares it with a storage position A'(B'') stored as the number of rotations, and stores the number of rotations. The microcomputer 20 outputs a motor deceleration signal when the rotational speed reaches the speed at which the motor approaches position A'(B') by a predetermined distance.

The motor 17 includes a forward rotation switch 27 operated by a relay fill 27a connected in series with a switching transistor 26, a reverse rotation switch 29 operated by a relay coil 29a connected in series with a switching transistor 28, and a reverse rotation switch 29 operated in series with a switching transistor 30. relay coil 31a
A deceleration tap changeover switch 31 operated by a deceleration tap switch 31 is provided, and each switch 27, 29, 31 is connected to the microcomputer 20.

If the configuration is as above, the seated person can press the set switch 2.
1 to the a side, for example, and operate the slide switch 18 to low speed L* or medium speed N (see Figure 2 (, )).
Based on the rotational position of the motor 17, the microcomputer 20 determines that the seat cushion 12 is, for example, at an intermediate position between the front and rear, and the switching transistor 26 is turned on and the forward rotation switch 27 is switched to the forward rotation position (see FIG. (see (b)), the motor 17 is connected to the power source Vcc and rotates in the normal direction, so that the seat cushion 12 is moved forward at a low or medium speed.

When the motor rotation speed is detected and the microcomputer 20 counts the rotation speed corresponding to 30 positions A' forward from the intermediate position, the switching transistor 26 is turned off and the forward rotation switch 27 is switched to the brake position 27B. The motor 17 then stops.

On the other hand, from this state, when the slide switch 21 is switched to the b side and the slide switch 18 is operated at high speed H (see FIG. It is determined that the position is in the front position rather than the intermediate position, the switching transistor 28 is turned on, the reverse switch 29 is switched to the reverse position 29A (see FIG. 2(b)), and the motor 17 is turned to the power supply Vcc in the reverse direction. The seat cushion 12 is connected and reversed, and the seat cushion 12 is moved backward at high speed.

Then, when the position detection sensor 22 detects the motor rotation speed and the microcomputer 20 counts the rotation speed when the motor approaches the Somll position B by a predetermined distance from the intermediate position, the switching transistor 3
0 is turned on, and the tap changeover switch 31 is set to deceleration position 3.
1A (see FIG. 2(c)), the input voltage decreases, and the motor 17 gradually decelerates.

Therefore, the backward movement of the sea cushion 12 is also gradually decelerated. This allows the Q seated person to recognize that he/she has approached the storage position B'.

Subsequently, when the microcomputer 20 counts the number of revolutions corresponding to position B'', the switching transistors 28 and 30 are turned off, the reverse switch 29 is set to the brake position 29B, and the tap changeover switch 31 is set to the normal connection. The motor 17 is then switched to position 31B, and the short circuit shown in FIG. 1 is closed and the motor 17 is stopped.

In the above embodiment, the tap changeover switch 31 is repeatedly operated only when the slide switch 18 is operated at high speed H. This is because the motor 17 is moved at a low speed, and at a medium speed N, the moving speed of the seat cushion 12 is slow, so there is little need to decelerate the motor 17.

[Brief explanation of drawings]

FIG. 1 is a motor control circuit diagram of an electric seat according to the present invention,
2(a) to 2(c) are timing waveform diagrams of each switch, FIG. 3 is a perspective view of the electric seat, and FIG. 4 is a conventional motor control circuit diagram. DESCRIPTION OF SYMBOLS 10... Vehicle seat, 12... Seat cushion, 17... Sea) drive motor, 18... Slide switch, 20... Microcomputer, 21... Set switch, 22... Position detection sensor, 27.29...Forward/reverse switch, 31...Deceleration tap changeover switch.

Claims (1)

[Claims] (1) A switch means for outputting a signal to move the seat to a pre-stored position, a position detection means for outputting a signal when the seat approaches the memorized position by a predetermined distance, and a seat drive motor for moving the seat. , the seat driving motor is driven by a signal from the switch means, and when a signal is issued from the position detecting means during sheet movement, the rotational speed of the sheet driving motor is changed so that the sheet movement speed is slowed down. An electric vehicle seat characterized by comprising a control means for controlling.