Power window device

• US 4,808,894 A
• Filed: 11/13/1987
• Issued: 02/28/1989
• Est. Priority Date: 09/04/1985
• Status: Expired due to Term

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Mizuta, Ken
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US07/120,712
• Time in Patent Office: 473 Days
• Field of Search: 318/264, 318/265, 318/266, 318/282, 318/283, 318/284, 318/286, 318/434, 318/461, 318/466, 318/467, 318/468, 318/469, 318/470, 318/445, 318/446, 318/452, 318/484, 307/10 R, 49/26, 49/28
• US Class Current: 318/266
• CPC Class Codes: E05F 15/70 with automatic actuation
• CPC Class Codes: E05Y 2900/55 Windows

Abstract

A power window device is adapted to drive a motor which automatically closes a windowpane of a car in response to door locking of the car, and cut the drive power for the motor after a predetermined time.

Claims

1. A power window device comprising:

a drive motor for driving a windowpane of a car in an opening direction and a closing direction;

a switch operating arrangement for selectively operating said drive motor to open or close the windowpane;

a separate switch which is normally open having one terminal connected to a power source in said car;

switch closing means for detecting when a door lock key is used to lock a door of said car and for closing said separate switch in response thereto;

drive means responsive to the closing of said separate switch for operating said drive motor to drive the windowpane in the closing direction; and

means cooperating with said switch closing means for reopening said separate switch after a predetermined period of time sufficient to obtain closing of the windowpane.

2. A power window device of claim 1 further comprising a detection means for changing the movement direction of said windowpane from closing direction to opening direction when it detects that a solid matter or obstacle is sandwiched between the windowpane and an opposed margin of the window frame during closing movement of the windowpane.

3. A power window device of claim 2 wherein said detection means comprises:

a sensor means measuring a characteristic of said drive motor;

a comparator means comparing the present and preceding values of the motor characteristic supplied from said sensor means to obtain a deviation value therefrom; and

a detection signal generating means generating a detection signal when said deviation value exceeds a predetermined level.