JPH0327867Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a power seat control device, and more particularly to a control device for a mechanism that adjusts the height, longitudinal position, and inclination of the seat back of an automobile seat.

<Prior Art> In general, the comfort of a car seat is very important, and care must be taken to reduce driver and passenger fatigue, especially when driving for a long time.

For this reason, although seat structures have been improved in terms of ergonomics, there are large individual differences in people's physiques and shapes, and even among people with the same physique and shape, there are individual differences in the way they sit. Furthermore, when the same person travels for long periods of time, the same posture can cause increased fatigue, so seats and seat backs are equipped with various adjustment mechanisms to allow the optimal position to be selected.

Therefore, a power seat has been developed in which the above-mentioned adjustment mechanism is driven not manually but by a switch operation using a motor, and which allows easy and stepless adjustment.

<Problem that the invention aims to solve> However, conventional electric power seats only move the seat and seat back at a constant speed by rotating a motor in a desired direction, so the speed may feel faster depending on individual differences. The problem is that it is slow and irritating. In particular, if the speed is too fast, fine adjustment cannot be made and the optimum position cannot be selected.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a power seat control device that can control the moving speed of a seat and a seat back.

<Means for Solving the Problems> In order to solve the above problems, the present invention provides a motor for driving the adjustment mechanism of the seat or seat back, a resistor whose resistance value changes when pressurized, and a resistor of the resistor. The motor is characterized by comprising a switching means for turning on or off the motor according to a change in resistance value, and a means for controlling a current applied to the motor according to the change in resistance value.

<Function> With the above configuration, the present invention starts the seat or seat bag and controls the moving speed by applying pressure to the resistor.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of a power seat control device according to the present invention.

The motor M is capable of forward and reverse rotation, and drives various adjustment mechanisms that adjust the seat height, front and rear positions, tilt the seat back, and the like. The power of the motor M can be transmitted by switching to each adjustment direction using a clutch (not shown), but this circuit may be provided for each adjustment direction.

Relays 10 and 2 are installed at both ends of the motor M, respectively.
0 common terminals 10a, 20a are connected, and one terminal 10b, 20b of each relay 10, 20 is connected to a power source (+V). Other terminals 10c and 20c of the relay 10 are transistors, respectively.
It is connected to the collectors of Tr ₁₀ and Tr ₁₁ and the collectors of transistors Tr ₂₀ and Tr ₂₁ . Note that a car battery can be used as the power source (+V).

The power supply (+V) further includes transistors Tr ₁₂ ,
The collector of Tr ₂₂ is connected to one end of resistors R ₁₀ and R ₂₀ made of conductive rubber, for example, silicone rubber mixed with graphite. As shown in FIG. 2, such conductive rubber is a resistor having a characteristic that its resistance value decreases when pressurized, and on the other hand, its resistance value increases when pressurization is stopped.

The other ends of resistors R ₁₀ and R ₂₀ are variable resistors, respectively.
Rv ₁₀ , Rv ₂₀ and the aforementioned transistor Tr ₁₂ ,
connected to the base of Tr ₂₂ , transistor Tr ₁₂ ,
The emitter of Tr ₂₂ is connected to one end of coils 10d and 20d of relays 10 and 20, respectively.
The other ends of the coils 10d and 20d are grounded.

The other ends of the variable resistors Rv ₁₀ and Rv ₂₀ are connected to the bases of transistors Tr ₁₀ and Tr ₂₀ , respectively, the emitters of transistors Tr ₁₀ and Tr ₂₀ are connected to the bases of transistors Tr ₁₁ and Tr ₂₁ , respectively, _and The emitter of Tr ₂₁ is grounded.
The variable resistors Rv ₁₀ and Rv ₂₀ are selected to have optimum resistance values when manufacturing this device so that the relays 10 and 20 do not operate when there is no pressure in the resistors R ₁₀ and R ₂₀ . Furthermore, the sign
ZD ₁₀ and ZD ₂₀ are Zener diodes that protect the transistors Tr ₁₀ and T ₁₁ and the transistors Tr ₂₀ and Tr ₂₁ and prevent the motor M from running out of control.

The operation of the above configuration will be described for the case where the seat is adjusted back and forth. Here, in FIG. 1, the motor M rotates in the normal direction when current flows from the left to the right in the figure, moving the seat forward, and on the other hand, when the current flows from the right to the left, it rotates in the reverse direction. Assume that the seat is moved in the rearward direction.

For example, when the occupant presses the resistor _R20 with his or her finger, the resistance value decreases, and the current from the power supply (+V) changes to the variable resistor.
It flows into Rv ₂₀ and the base of transistor Tr ₂₂ . Therefore, the transistor Tr ₂₂ is turned on, and the coil 20d of the relay 20 is energized.
Common electron 20a connects to terminal 20c. (Dotted line shown). On the other hand, the current through the variable resistor Rv ₂₀ turns on the transistor Tr ₂₀ , so that the power supply (+
The current of V) is as follows: terminal 10b of relay 10→common terminal 10a→motor M→common terminal 20 of relay 20
The flow flows in the order of a→terminal 20c→transistors Tr ₂₀ and Tr ₂₁ , and the sheet moves forward.

If the resistor R ₂₀ is pressed even harder, its resistance value will further decrease, so that the transistors Tr ₁₀ , Tr ₂₁
The current IB flowing to the base side of the motor M increases.
The current I flowing through increases, and the moving speed of the sheet increases. When the pressurization of the resistor R ₂₀ is stopped, the resistance value increases and the transistor Tr ₂₂ is turned off, thus shorting both ends of the motor M and stopping the sheet.

Resistance R ₁₀ when moving the seat backwards
Operate in the same way.

That is, by selectively applying pressure to resistor R ₁₀ or R ₂₀ , it is possible to start moving the sheet and control the moving speed.

<Effects of the invention> As explained above, the present invention controls the energization of the motor and the amount of energization by controlling the resistor whose resistance value changes when pressurized. Since the moving speed can be controlled and fine adjustments can be made, the optimal position of the seat and seat back can be selected.

Furthermore, the present invention is easy to operate because the power seat adjustment mechanism is turned on/off and speed controlled only by the resistor.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a power seat control device according to the present invention, and FIG. 2 is a graph showing the pressure-resistance value characteristic of the resistor shown in FIG. 1. M...Motor, _R10 , _R20 ...Resistance, _Tr10 ,
Tr ₁₁ , Tr ₁₂ , Tr ₂₀ , Tr ₂₁ , Tr ₂₂ ... transistor, 10, 20 ... relay.

Claims (1)

[Scope of utility model registration request] a motor that drives a seat or seat back adjustment mechanism; a resistor whose resistance value changes when pressurized; a switching means that turns on or off the motor according to the change in the resistance value of the resistor; A power seat control device comprising means for controlling a current applied to the motor, and controlling a moving speed when the seat or seat bag is started by applying pressure to the resistor.