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Title:
OPERATING EQUIPMENT OF OPENING/CLOSING BODY WHICH USES DC MOTOR
Document Type and Number:
Japanese Patent JP3585670
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To enable holding the stopped state of a opening/closing body by simple structure, when an opening/closing body is opened and closed by a DC motor.
SOLUTION: A shutter is opened and closed by using a DC motor M as a driving source. After the shutter is opened and closed by supplying a power source to the DC motor M, the power supply is stopped and the shutter is stopped. A short circuit control part 8 closes a short circuit switch 7 connected between power source terminals 6a and 6b of the DC motor M, for a given period. Electric power generated by the inertial force of the DC motor M is quickly consumed in a closed loop of the short circuit switch 7. A magnetic force is developed in the core of the DC motor M, and a force is developed which fixes the core in the direction wherein the magnetic force of the core is balanced with that of a magnet. In the direction, the DC motor M stops. The shutter is held at this stop position.


Inventors:
Etsunori Shimamura
Mimasa Nagai
Yuichi Tozono
Toshiyuki Suzuki
Application Number:
JP26307596A
Publication Date:
November 04, 2004
Filing Date:
October 03, 1996
Export Citation:
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Assignee:
Bunka Shutter Co., Ltd.
Taiyo Sangyo Co., Ltd.
International Classes:
E06B9/80; E05F15/10; E06B9/32; H02P3/12; (IPC1-7): H02P3/12; E05F15/10; E06B9/32; E06B9/80
Domestic Patent References:
JP7062960A
JP5256063A
JP54077910U
JP50125012U
JP5084196U
Attorney, Agent or Firm:
Norimitsu Nishimura