JPS54147832A - Moving member stopper in camera - Google Patents
Moving member stopper in cameraInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57205119U (en) * | 1981-06-23 | 1982-12-27 |
-
1978
- 1978-05-12 JP JP5633678A patent/JPS54147832A/en active Pending
Cited By (2)
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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