JPS57151923A - Automatic rewinding camera - Google Patents
Automatic rewinding cameraInfo
- Publication number
- JPS57151923A JPS57151923A JP3647381A JP3647381A JPS57151923A JP S57151923 A JPS57151923 A JP S57151923A JP 3647381 A JP3647381 A JP 3647381A JP 3647381 A JP3647381 A JP 3647381A JP S57151923 A JPS57151923 A JP S57151923A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- motor
- drops
- point
- load
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/42—Interlocking between shutter operation and advance of film or change of plate or cut-film
- G03B17/425—Interlocking between shutter operation and advance of film or change of plate or cut-film motor drive cameras
Abstract
PURPOSE:To prevent malfunction by detecting a power voltage, and then increasing a time constant by connecting two capacitors in parallel by turning on a switching circuit when the detected voltage drops down to a prescribed value. CONSTITUTION:As a power source 85 is used, its voltage drops, so a motor 1 rotates solwly. In this case, the rotation of the motor 1 is influenced easily by a load, and made slower and slower as the rotational angle of a shutter setting cam 48 nears 180 deg.. As a result, the pulse interval of a differentiating circuit 101 increases. As the load on the motor 1 increases, the voltage of the power source 85 drops and a voltage at a point B also drops accordingly to reduce the charging current of a capacitor 87 slightly, but the charging time is prolonged, so that a voltage at a point A rises. Therefore, the output of a comparator 88 is inverted at a point E to form a reversing circuit for the motor 1.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647381A JPH0233133B2 (en) | 1981-03-16 | 1981-03-16 | JIDOMAKIMODOSHIKAMERA |
| DE19823249793 DE3249793C2 (en) | 1981-02-27 | 1982-02-26 | Camera with motor drive - has film drive sensor and control circuit operating rewind if film perforations are torn |
| DE19823206986 DE3206986A1 (en) | 1981-02-27 | 1982-02-26 | CAMERA |
| US06/353,031 US4400074A (en) | 1981-02-27 | 1982-03-01 | Automatic rewinding camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647381A JPH0233133B2 (en) | 1981-03-16 | 1981-03-16 | JIDOMAKIMODOSHIKAMERA |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57151923A true JPS57151923A (en) | 1982-09-20 |
| JPH0233133B2 JPH0233133B2 (en) | 1990-07-25 |
Family
ID=12470778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3647381A Expired - Lifetime JPH0233133B2 (en) | 1981-02-27 | 1981-03-16 | JIDOMAKIMODOSHIKAMERA |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233133B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962840A (en) * | 1982-10-04 | 1984-04-10 | Konishiroku Photo Ind Co Ltd | Camera incorporating motor |
| JPS59157623A (en) * | 1983-02-28 | 1984-09-07 | Olympus Optical Co Ltd | Film end detector |
| JPS62215252A (en) * | 1986-03-17 | 1987-09-21 | Mitsumi Electric Co Ltd | Film winding control circuit for camera |
-
1981
- 1981-03-16 JP JP3647381A patent/JPH0233133B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962840A (en) * | 1982-10-04 | 1984-04-10 | Konishiroku Photo Ind Co Ltd | Camera incorporating motor |
| JPS59157623A (en) * | 1983-02-28 | 1984-09-07 | Olympus Optical Co Ltd | Film end detector |
| JPS62215252A (en) * | 1986-03-17 | 1987-09-21 | Mitsumi Electric Co Ltd | Film winding control circuit for camera |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0233133B2 (en) | 1990-07-25 |
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