JPS5652725A - Automatic film winder of camera - Google Patents

Automatic film winder of camera

Info

Publication number
JPS5652725A
JPS5652725A JP12965679A JP12965679A JPS5652725A JP S5652725 A JPS5652725 A JP S5652725A JP 12965679 A JP12965679 A JP 12965679A JP 12965679 A JP12965679 A JP 12965679A JP S5652725 A JPS5652725 A JP S5652725A
Authority
JP
Japan
Prior art keywords
driving
circuit
motor
integrating circuit
maintains
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
JP12965679A
Other languages
Japanese (ja)
Inventor
Masahiko Ogawa
Hideo Tamamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP12965679A priority Critical patent/JPS5652725A/en
Priority to DE19803038030 priority patent/DE3038030A1/en
Publication of JPS5652725A publication Critical patent/JPS5652725A/en
Pending legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)

Abstract

PURPOSE: To cause film winding operation to be surely executed by connecting an integrating circuit between a driving current detecting end and driving circuit control means input end and operating the control means only when the output of the integrating circuit reaches a predetermined value.
CONSTITUTION: An npn transistor 304 for driving is connected in a driving circuit of a motor Mo and a resistance 306, a capacitor 308, and the collector of an npn transistor 312 forming an overload control circuit are connected to the base of the TR304 for driving. At the starting, large current flows to the motor Mo, but only the voltage corresponding to the time constant of an integrating circuit is applied to the base of the TR312, and the TR312 maintains a nonconducting state; in addition, the TR304 for driving maintains a conducting state, thus the motor Mo continues to run, whereby the film winding operation is accomplished surely.
COPYRIGHT: (C)1981,JPO&Japio
JP12965679A 1979-10-08 1979-10-08 Automatic film winder of camera Pending JPS5652725A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12965679A JPS5652725A (en) 1979-10-08 1979-10-08 Automatic film winder of camera
DE19803038030 DE3038030A1 (en) 1979-10-08 1980-10-08 Automatic film winder for camera - has integrating circuit to monitor film tension to prevent tearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12965679A JPS5652725A (en) 1979-10-08 1979-10-08 Automatic film winder of camera

Publications (1)

Publication Number Publication Date
JPS5652725A true JPS5652725A (en) 1981-05-12

Family

ID=15014894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12965679A Pending JPS5652725A (en) 1979-10-08 1979-10-08 Automatic film winder of camera

Country Status (2)

Country Link
JP (1) JPS5652725A (en)
DE (1) DE3038030A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57166563A (en) * 1981-04-07 1982-10-14 Matsushita Electric Ind Co Ltd Voltage detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57166563A (en) * 1981-04-07 1982-10-14 Matsushita Electric Ind Co Ltd Voltage detector
JPH0424666B2 (en) * 1981-04-07 1992-04-27 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
DE3038030A1 (en) 1981-04-23

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