Device for lifting up and down window glass for vehicle

Details Device for lifting up and down window glass for vehicle Device for lifting up and down window glass for vehicle

1988-09-16

1990-06-05

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318265, 318286, 318467, 318652, G05B 1118

Patent

active

049317148

ABSTRACT:
According to the present invention, there is provided a device for lifting up and down window glass for a vehicle including a reversible motor for lifting up and down window glass of a vehicle, a drive circuit connected to an input side of the reversible motor, a comparison circuit and/or a control circuit connected to an input side of the drive circuit, a window glass opening degree determination mechanism connected to an input side of the control circuit so as to produce either reference voltage or comparison voltage, a window glass opening degree detector connected to a comparison input of the comparison circuit so as to produce either reference voltage or comparison voltage in accordance with window glass opening degree. The device of the present invention is particularly characterized by the control circuit including a locking detector which outputs a signal as the output signal of the window opening degree detector exceeds a predetermined value when the window glass is moved in abnormal manner, and therefore it offers excellent serviceability and safety, namely it can protect a baby in the vehicle from an accident.

REFERENCES:
patent: 4263539 (1981-04-01), Barton
patent: 4328451 (1982-05-01), Barge
patent: 4408146 (1983-10-01), Beckerman
patent: 4549125 (1985-10-01), Sonobe
patent: 4556835 (1985-12-01), Vogel et al.
patent: 4712053 (1987-12-01), Numata
patent: 4785224 (1988-11-01), Pfalzgraf et al.
"Simple Position Servo", Practical Electronics, Mar. 1977, p. 218.

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