JPS596140A - Position detector for car seat - Google Patents

Abstract

PURPOSE:To reduce the error by generating pulses in accordance with forward and backward movements of a car seat and counting them for obtaining a position signal. CONSTITUTION:A detecting unit 20 is provided near a lock hole 6 of a lower rail 2 of a seat-slide mechanism. The detecting part 20 is provided with switches 22 and 23 for repeating on/off operation on every catching and releasing between an operation rod 26 and the lock hole 6. The signal thereof is supplied to one-shot circuits 34 and 35, and fed to terminals 36a and 36b as an addition or subtraction signal for an up/down counter 36 for indicating in an indicator 39. When a car-seat comes to a limited position, a switch 37 is on, and a signal is supplied to a reset terminal 36c via a one-shot circuit 38 for resetting the up/ down counter 36.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat position detection device, and more particularly to a device for detecting the longitudinal position of a vehicle seat using a counter.

Generally, in a control device that automatically controls the longitudinal position of a vehicle seat, a signal from a longitudinal position detection device of the vehicle seat and a target value set by the occupant or a target value stored in advance in a storage device are used. When both signals become equal, the vehicle seat is automatically set to the most suitable position by stopping the forward and backward movement of the vehicle seat7.
ing.

Conventionally, several of the above-mentioned position detection devices are arranged on the floor side where a vehicle seat is arranged, and are thereby configured to output a position signal corresponding to the movement of the vehicle seat.

1, or 1. Therefore, according to such a position detection device,
Since the carrying position of the vehicle seat differs depending on the car model, the position detection device must be installed at a different position each time the position is changed, which makes the installation often complicated. Moreover, it has the disadvantage that an error occurs in the output signal.

In particular, this position detection device can be used to track the movement of the vehicle notebook (
For vehicles, the position of 7-1 is detected as a change in the resistor. It had the disadvantage that it would become more prone to errors due to wear and tear due to long-term use.

An object of the present invention is to generate pulses in response to the back and forth movement of a vehicle seat, and to obtain a position signal of a vehicle notebook by counting these pulses. This will be explained in detail below using examples.

1 and 2 are simplified configuration diagrams showing one embodiment of the vehicle seat position detection device according to the present invention, and in each figure, 1 is a slide mechanism for sliding the seat cushion portion of the situation sorter. This is composed of a lower rail 2 and an upper rail 3, which are fixed to the left and right sides of the floor surface of the vehicle seat by means of handles (not shown). The lower rail 2 has a substantially U-shaped cross section, and has bent pieces 2c, 2C bent outward at the upper ends of the rising pieces 2a, 2b, and the upper rail 3 has bent pieces 2c, 2C bent outward. The pieces 2C, 2C are formed to have an inverted U-shape in cross section so as to cover them from the upper side, and a stopper piece 3c is provided on the lower end side.
3c, and a roller (not shown) is interposed between the upper rail 3 and the lower rail 2, so that the upper rail 3 can freely slide in the front and rear directions.

In this case, a plurality of lock holes 6 are provided in the rising piece 2b of one of the lower rails 2 along the longitudinal direction, and a plurality of lock holes 6 are provided in each of the upper rails 3 and 3 in the figure. When the tip of the cup pin is locked,
Upper rail 3. 30 front 1 can restrict sliding in multiple directions.

The bracket 21 for holding the ml wall 3xK/i of the upper rail 3 and the switch mechanism 20 has been removed. As shown in FIG. 2, the switch mechanism 20 has one end between the microswitches 22 and 23 of 21, which are arranged so that the actuating parts 22a and 23a face each other, and the actuating parts 22a and 23a. The other end of the actuating rod is fitted into the lock hole 6 provided in the lower rail 2 and abuts L, and has an actuating rod 26 pivotally connected to the holding frame 24 by a shaft 25. 26 is spring 2
7.27, it is being towed with an equal force to maintain a neutral state. Therefore, if the upper rail 3 is now moved toward the front of the vehicle (in the direction of arrow a), the holding frame 24 constituting the switch section 20 will also move in the same direction. Lock it in the lock hole 6 and
The actuating portion 23a of the stop switch 23 is pressed and the switch 23 is turned on. When the acupuncture rail 3 moves further toward the front a, the actuating rod 26
The other end fits into the other locks (1 and 6), so the original state is restored t7, which turns off the switch 23. When the upper rail 3 moves in the opposite direction to the direction of the arrow a, the other switch 22 is turned on and off a number of times corresponding to the amount of movement.

The signal obtained from the i-signature switch 22.23 is fed to a one-shot circuit 34.35 as shown in FIG.
As a result, one-shot circuit 34°: 35 to 2 pulses corresponding to the on and off periods of switches 22 and 23.
4a, 25a can be obtained, and the pulse 34a shown in FIG. down terminal 3 of counter 36
6b. - 1111j of lower rail 2 written in
Several lever switches 37 are installed on the rear end side of the wall, and these switches 37 are turned on, for example, by the above-mentioned bracket 21 when the upper rail 3 moves to the rear as much as possible. The output signal of this switch 37 is shaped into a pulse by a one-shot circuit 38, and this pulse 38a is combined with the reset signal of the up/down counter 36 and 1. and is supplied to the reset terminal 36c. Incidentally, the output signal of the up/down counter 36 as a printing number is displayed numerically by a display device 39. This numerical value and the output signal at 1 to 1 are supplied to a central processing unit (not shown), which outputs an output signal including the M1 numerical value and a target value set by the seated person or a predetermined value. Compare and calculate the amount of movement of the vehicle seat by comparing and calculating the memory value stored in the storage device. be able to.

In the above configuration, when the switch 37 is turned on by first moving the vehicle seat as far as possible to the rear, a pulse signal 38a can be obtained from the one-shot circuit 38, and this signal 38a causes the up/down counter 36 to be activated. Can be held in a reset state. At this time, the display content on the display device 39 becomes 0. Next, the vehicle seat is moved in the front direction a, and when the upper rail 3 follows this and moves in the front direction a, the operating rod 26 engages the lock hole 6 and rotates. Each time, an on/off signal is obtained from the switch 23, and this signal is formed into a pulse by the one-shot circuit 34, and a number of pulses 34a corresponding to the amount of movement of the upper rail 3 are sent to the up terminal 36a of the up/down counter 36. Since the data is supplied, the display contents of the display device 39 are added.

That is, the content of the display device 29 increases as the vehicle seat moves forward. Next, when the vehicle seat retreats and the upper rail 3 follows, the operating rod 26 moves into the lock hole 6.
The switch 22 is turned on and off each time it is locked and rotated.
This signal is converted into a pulse by the one/yoat circuit 35, and this pulse signal 35a is sent to the amplifier down counter 2.
6 as a subtraction signal. Therefore, the up/down counter 36 performs a subtraction operation based on the pulse 35a, thereby subtracting the display content of the display device 39. That is, when the vehicle /-(- moves backward, the display content on the display device 39 is subtracted.

Therefore, the display content of the display device 39 displays the front and rear positions of the vehicle seat. Therefore, the seated person can know the front and back position of the vehicle seat from this display content, or by supplying the output signal including the count from the knob down counter 36 to the central processing unit. The arithmetic processing unit maintains the vehicle seat in the most preferable state by stopping a motor (not shown) that adjusts the longitudinal position of the vehicle seat when this output signal (including direct) reaches the target value. be able to.

Although the present embodiment has been described as using the lock hole 6 to operate the actuating rod 26, the present invention is not limited to this, and other actuating holes for actuating the actuating rod 26 may be separately provided. Of course, it is also a good thing.

As described above, the vehicle seat position detection device according to the present invention includes a first pulse generating means that outputs a number of pulses corresponding to the amount of movement of the vehicle seat in the front direction; A second pulse generating means generates a number of pulses corresponding to the movement of the notebook in the rearward direction; Since it is composed of an up/down counter that performs subtraction depending on the signal, this position detection device can be incorporated into a vehicle trunk.
There is no need to install it on the floor of the vehicle as in the past, so installation is easy to adjust.Furthermore, it does not use contacts and resistors as in the past, so there are no wear points, so it has a long life. In addition, accurate position signals can be obtained without errors.

[Brief explanation of drawings]

1 and 2 are a perspective view and a sectional view showing an embodiment of a position detection device for a vehicle seat according to the present invention, and FIG. 3 is a circuit diagram of a position detection device for a vehicle /-1- according to the present invention. FIG. Toss light mechanism, 2 Lower rail, 3...Upper rail, 20-1 protrusion, 21 Bracket, 22.23.
・Switch, 2G... Operating rod, 26... Up/down counter.

Claims (1)

[Claims] a first pulse generating means that outputs a number of pulses corresponding to the amount of movement of the vehicle seat in the front direction; and a second pulse generation means that generates a number of pulses that corresponds to the amount of movement of the vehicle seat in the rear direction.
A vehicle comprising a pulse generating means and an up/down counter for adding and counting pulse signals from one of the pulse generating means and subtracting and counting a signal from the other pulse generating means [7] Seat position detection device.