JPS6459224A - Electromagnetically driven shutter - Google Patents

Electromagnetically driven shutter

Info

Publication number
JPS6459224A
JPS6459224A JP21579987A JP21579987A JPS6459224A JP S6459224 A JPS6459224 A JP S6459224A JP 21579987 A JP21579987 A JP 21579987A JP 21579987 A JP21579987 A JP 21579987A JP S6459224 A JPS6459224 A JP S6459224A
Authority
JP
Japan
Prior art keywords
shutter
specific position
power
displacement
supplying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP21579987A
Other languages
Japanese (ja)
Other versions
JP2631103B2 (en
Inventor
Koji Toda
Shinichiro Mariko
Nobuo Kitamura
Yoshinobu Tanaka
Masaru Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP62215799A priority Critical patent/JP2631103B2/en
Publication of JPS6459224A publication Critical patent/JPS6459224A/en
Application granted granted Critical
Publication of JP2631103B2 publication Critical patent/JP2631103B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Shutters For Cameras (AREA)

Abstract

PURPOSE:To precisely adjust the aperture characteristic of a shutter even in case of the variation of a driving voltage by controlling the interval of supplying a power to an electromagnetic after attaining a specific position according to the time necessary to attain the specific position obtained during the displacement from a 1st position to a 2nd position. CONSTITUTION:A photocoupler 20, etc., detects that the specific position obtained during the displacement from the 1st position to the 2nd position of permanent magnets 3 and 4 or shutter blades 5 and 6 is attained and according to the time necessary to attain the specific position, the interval of supplying the power from a power source; such as a battery, etc., in which the voltage varies, to the electromagnet 14 is controlled after attaining the specific position. Namely, when the time necessary for the displacement of the shutter blades 5 and 6 by a specific amount from a closing initial position to an opening direction is made to vary with the lapse of time and temperature characteristic, etc., of the battery the interval of supplying the power to the electromagnet 14 for driving the shutter is increased and decreased according to the length of the necessary time. Thus, the aperture characteristic of the shutter can be always kept constant or nearly constant.
JP62215799A 1987-08-28 1987-08-28 Electromagnetic drive shutter Expired - Fee Related JP2631103B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62215799A JP2631103B2 (en) 1987-08-28 1987-08-28 Electromagnetic drive shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62215799A JP2631103B2 (en) 1987-08-28 1987-08-28 Electromagnetic drive shutter

Publications (2)

Publication Number Publication Date
JPS6459224A true JPS6459224A (en) 1989-03-06
JP2631103B2 JP2631103B2 (en) 1997-07-16

Family

ID=16678439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62215799A Expired - Fee Related JP2631103B2 (en) 1987-08-28 1987-08-28 Electromagnetic drive shutter

Country Status (1)

Country Link
JP (1) JP2631103B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329837U (en) * 1989-07-28 1991-03-25
JP2008233643A (en) * 2007-03-22 2008-10-02 Korg Inc Key displacement quantity detecting device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63167340A (en) * 1986-12-29 1988-07-11 Kyocera Corp Electromagnetic driving shutter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63167340A (en) * 1986-12-29 1988-07-11 Kyocera Corp Electromagnetic driving shutter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329837U (en) * 1989-07-28 1991-03-25
JP2008233643A (en) * 2007-03-22 2008-10-02 Korg Inc Key displacement quantity detecting device

Also Published As

Publication number Publication date
JP2631103B2 (en) 1997-07-16

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees