JPS54147832A - Moving member stopper in camera - Google Patents

Moving member stopper in camera

Info

Publication number
JPS54147832A
JPS54147832A JP5633678A JP5633678A JPS54147832A JP S54147832 A JPS54147832 A JP S54147832A JP 5633678 A JP5633678 A JP 5633678A JP 5633678 A JP5633678 A JP 5633678A JP S54147832 A JPS54147832 A JP S54147832A
Authority
JP
Japan
Prior art keywords
voltage
moving member
comparator
lens
set position
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
JP5633678A
Other languages
Japanese (ja)
Inventor
Saburo Numata
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical Co Ltd
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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP5633678A priority Critical patent/JPS54147832A/en
Publication of JPS54147832A publication Critical patent/JPS54147832A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Braking Arrangements (AREA)

Abstract

PURPOSE: To stop moving member without dumping by performing preliminary controlling when the moving member comes to the neighborhood of the set position thereby letting the same approach to the set position and so controlling the same that its movement stops at the set position.
CONSTITUTION: The reference voltages of a main comparator 12 and a spare comparator 9 have been set in correspondence to the extension quantity of the objective lens L supported to the controlled member, i.e., rack 1. The voltage corresponding to the extension quantity of the lens L is outputted by a position-voltage converter 13 and when this output becomes equal to the reference voltage of the spare comparator 9, an electromagnetic brake 6 is operated by a coincidence signal 1 and a driving shaft 2, hence the lens 1 as well are reduced in speed. Next, when the output voltage of the position-voltage converter 13 becomes equal to the reference voltage of the main comparator 12, a coincidence signal II is outputted, by which the electromagnetic means 10 of a hood device 7 for stopping is energized and the operation of the rack 1 supporting the objective lens 1 is thereby stopped.
COPYRIGHT: (C)1979,JPO&Japio
JP5633678A 1978-05-12 1978-05-12 Moving member stopper in camera Pending JPS54147832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5633678A JPS54147832A (en) 1978-05-12 1978-05-12 Moving member stopper in camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5633678A JPS54147832A (en) 1978-05-12 1978-05-12 Moving member stopper in camera

Publications (1)

Publication Number Publication Date
JPS54147832A true JPS54147832A (en) 1979-11-19

Family

ID=13024355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5633678A Pending JPS54147832A (en) 1978-05-12 1978-05-12 Moving member stopper in camera

Country Status (1)

Country Link
JP (1) JPS54147832A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205119U (en) * 1981-06-23 1982-12-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205119U (en) * 1981-06-23 1982-12-27
JPH0331934Y2 (en) * 1981-06-23 1991-07-08

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