JPS55126229A - Stopping device of motor-driven mirror of variable power projector - Google Patents

Stopping device of motor-driven mirror of variable power projector

Info

Publication number
JPS55126229A
JPS55126229A JP3370879A JP3370879A JPS55126229A JP S55126229 A JPS55126229 A JP S55126229A JP 3370879 A JP3370879 A JP 3370879A JP 3370879 A JP3370879 A JP 3370879A JP S55126229 A JPS55126229 A JP S55126229A
Authority
JP
Japan
Prior art keywords
motor
mirror
lever
gear
barrel
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.)
Pending
Application number
JP3370879A
Other languages
Japanese (ja)
Inventor
Kimichika Yamada
Katsushige Kiyokawa
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.)
Nidec Precision Corp
Original Assignee
Nidec Copal 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 Nidec Copal Corp filed Critical Nidec Copal Corp
Priority to JP3370879A priority Critical patent/JPS55126229A/en
Publication of JPS55126229A publication Critical patent/JPS55126229A/en
Pending legal-status Critical Current

Links

Landscapes

  • Projection Apparatus (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE: To achieve simpler and surer operations by turning a movable reflecting mirror by the utilization of an electromagnetic driving device and so controlling the same that the power source for the drive motor is cut off when the mirror touches the stopper disposed in the specified position.
CONSTITUTION: In order to eliminate the backlash at the time of moving a lens- barrel 19 from a gear 14 and gear train 17 by way of a lever 18 and pin 20 by driving a motor 10, a spring 22 is stretched between the level 18 and machine frame and a spring 23 between the lever 18 and lens-barrel 19. The movement amount of the lever 18 gives suitable decelerations to the gear 14 and gear train 17, so that the focus controlling of a projection lens system 5 is accurately accomplished in correspondence to the 1st and 2nd positions of the mirror 6. The motor 10 runs forward or backward and when the mirror 6 touches the stopper 16 or 15, switches 28, 29 are closed and when the over-current by the rotation inhibition runs in the motor 10, this is detected and the energizing of the motor 10 is cut off, whereby the mirror is surely stopped in the specified position.
COPYRIGHT: (C)1980,JPO&Japio
JP3370879A 1979-03-22 1979-03-22 Stopping device of motor-driven mirror of variable power projector Pending JPS55126229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3370879A JPS55126229A (en) 1979-03-22 1979-03-22 Stopping device of motor-driven mirror of variable power projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3370879A JPS55126229A (en) 1979-03-22 1979-03-22 Stopping device of motor-driven mirror of variable power projector

Publications (1)

Publication Number Publication Date
JPS55126229A true JPS55126229A (en) 1980-09-29

Family

ID=12393908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3370879A Pending JPS55126229A (en) 1979-03-22 1979-03-22 Stopping device of motor-driven mirror of variable power projector

Country Status (1)

Country Link
JP (1) JPS55126229A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051948C (en) * 1993-09-08 2000-05-03 厄罗瓦公司 Driving apparatus
JP2015081998A (en) * 2013-10-22 2015-04-27 セイコーエプソン株式会社 Lens change-over device and projector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051948C (en) * 1993-09-08 2000-05-03 厄罗瓦公司 Driving apparatus
JP2015081998A (en) * 2013-10-22 2015-04-27 セイコーエプソン株式会社 Lens change-over device and projector

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