Safety window for car

• US 5,248,897 A
• Filed: 02/06/1992
• Issued: 09/28/1993
• Est. Priority Date: 02/07/1991
• Status: Expired due to Fees

• Current Assignee: Yong-Koo Lee
• Original Assignee: Yong-Koo Lee
• Inventors: Lee, Yong-Koo
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Elms, Richard T.
• Application Number:
  US07/832,215
• Time in Patent Office: 600 Days
• Field of Search: 307/120, 307/9.1, 307/10.1, 318/461, 318/463, 318/466, 318/456, 318/460, 318/280-286, 49/43, 49/118, 49/138, 296/223, 160/7, 160/29, 160/296, 180/281
• US Class Current: 307/10.1
• CPC Class Codes: B60J 7/0573 power driven arrangements, e.g. electrical
• CPC Class Codes: E05F 15/70 with automatic actuation
• CPC Class Codes: E05Y 2800/00 Details, accessories and auxiliary operations not otherwise provided for
• CPC Class Codes: E05Y 2900/542 Roof panels
• CPC Class Codes: E05Y 2900/55 Windows

Abstract

A safety window for a car which is capable of being automatically moved to its window closing position when the car speed exceeds a predetermined speed. The safety window comprises a control device for controlling the operation of the power window, which comprises a sensor for detecting a car speed, a comparator for comparing the car speed with a predetermined window closing car speed, and a power supply circuit for supplying the reference voltage to the comparator in an automatic window operation mode. The power supply circuit includes a select switch provided with a manual operation contact and an automatic operation contact, a reference voltage generator connected to the automatic operation contact and adapted to generate the reference voltage in the automatic window operation mode, and a limit switch adapted to send selectively the reference voltage from the reference voltage generator to the comparator. In accordance with the present invention, the car window can be closed when the car speed exceeds the predetermined window closing car speed, thereby reducing the burden of manipulation on the driver and enabling him to concentration his attention on what he is driving.

Claims

1. A device for controlling the operation of a power window for a car, the power window including a drive motor for driving the car window between an opened position and a closed position and a control means for controlling the driving direction of the motor, the device comprising:

a sensor adapted to detect the driving speed of the car;

a D/A converter adapted to convert a pulse train from the sensor into an analog signal;

a comparator adapted to compare the output from the D/A converter with a reference voltage indicative of a predetermined window closing car speed, the comparator having an inverting terminal connected with the output terminal of the D/A converter and a non-inverting terminal receiving the reference voltage;

an A/D converter connected to the output terminal of the comparator and adapted to convert an output signal from the comparator into a digital signal, in response to the reference voltage;

a switching circuit connected to the output terminal of the A/D converter and adapted to supply selectively a bias voltage to the control means, in response to an output signal from the A/D converter, and

a power supply circuit adapted to supply the reference voltage to the comparator in an automatic window operation mode, the power supply circuit including a select switch provided with a manual operation contact and an automatic operation contact and adapted to select one from a manual window operation mode and the automatic window operation mode, the select switch being connected to a power source of the car, a reference voltage generator connected to the automatic operation contact and adapted to generate the reference voltage in the automatic window operation mode, and a limit switch adapted to send selectively the reference voltage from the reference voltage generator to the comparator, so that the car window can be closed when the car speed exceeds the predetermined window closing car speed.

2. A device for controlling the operation of a power window for a car equipped with a liquid crystal display instrument board including a liquid crystal display circuit, the control device comprising:

a decoder adapted to receive an output indicative of the car speed from a liquid crystal display drive circuit;

an AND gate adapted to receive an output signal from the decoder and a reference voltage indicative of a predetermined window closing car speed;

a switching circuit connected to the output terminal of the AND gate and adapted to supply selectively a bias voltage to a control means for driving the car window between an opened position and a closed position, in response to an output signal from the AND gate, and

a power supply circuit adapted to supply the reference voltage to the AND gate in an automatic window operation mode, the power supply circuit including a select switch provided with a manual operation contact and an automatic operation contact and adapted to select one from a manual window operation mode and the automatic window operation mode, the select switch being connected to a power source of the car, a reference voltage generator connected to the automatic operation contact and adapted to generate the reference voltage in the automatic window operation mode, and a limit switch adapted to send selectively the reference voltage from the reference voltage generator to the AND gate, so that the car window can be closed when the car speed exceeds the predetermined window closing car speed.