JPS57135935A - Malfunction preventing device for interchangeable finder - Google Patents

Malfunction preventing device for interchangeable finder

Info

Publication number
JPS57135935A
JPS57135935A JP2186081A JP2186081A JPS57135935A JP S57135935 A JPS57135935 A JP S57135935A JP 2186081 A JP2186081 A JP 2186081A JP 2186081 A JP2186081 A JP 2186081A JP S57135935 A JPS57135935 A JP S57135935A
Authority
JP
Japan
Prior art keywords
finder
interchangeable
contact
pin
preventing device
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
JP2186081A
Other languages
Japanese (ja)
Inventor
Tatsuo Konno
Akio Sunochi
Masahisa Fujino
Takashi Suzuki
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 JP2186081A priority Critical patent/JPS57135935A/en
Publication of JPS57135935A publication Critical patent/JPS57135935A/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
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)

Abstract

PURPOSE:To prevent accidents of an electric shock etc., by providing a switch mechanism, which is opened when an interchangeable finder is removed from a body, in the interchangeable finder having a contact pin to be connected to a contact on the body side. CONSTITUTION:A interchangeable finder 1 is attached and detached freely to and from a camera body 17 by rails 1a and 15. When the finder 1 is mounted on the camera body 17, a pin 4 is pressed upward, and switch pieces 5 and 6 are brought into contact with each other, and a conductor 10 extended to an acccessory shoe, a signal pin 10, and a conductor 16 on the camera side are connected to form a circuit. When the finder is removed, switch pieces are apart from each other, and thus, an electric shock, a malfunction, etc. are prevented even if a signal pin 14 is touched.
JP2186081A 1981-02-17 1981-02-17 Malfunction preventing device for interchangeable finder Pending JPS57135935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2186081A JPS57135935A (en) 1981-02-17 1981-02-17 Malfunction preventing device for interchangeable finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2186081A JPS57135935A (en) 1981-02-17 1981-02-17 Malfunction preventing device for interchangeable finder

Publications (1)

Publication Number Publication Date
JPS57135935A true JPS57135935A (en) 1982-08-21

Family

ID=12066864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2186081A Pending JPS57135935A (en) 1981-02-17 1981-02-17 Malfunction preventing device for interchangeable finder

Country Status (1)

Country Link
JP (1) JPS57135935A (en)

Similar Documents

Publication Publication Date Title
GB2133629B (en) Circuit interrupter with improved electromechanical undervoltage release mechanism
PT71858A (en) ELECTRICAL SAFETY ON THE CLOSURE MECHANISM OF A VANTAIL
JPS5792921A (en) Electronic switch unit operated without contact
NZ182086A (en) Undervoltage release mechanism on circuit breaker
NZ210256A (en) Circuit breaker with contact arms resiliently mounted on cross-bar
EP0035225A3 (en) Proximity switch with matching monitoring devices
NZ194745A (en) Moulded case circuit breaker with magnetizable arc extinguishing members
GB1480243A (en) Electrical signal initiating devices
JPS5793729A (en) Electronic switch unit operated without contact
JPS57135935A (en) Malfunction preventing device for interchangeable finder
GB2033177B (en) Circuit breaker with undervoltage release
JPS5435377A (en) Electronic safety switch which operates without contact
PH21584A (en) Plug socket with circuit breaking mechanism
JPS5744116A (en) Connector device of endoscope
GB2058420B (en) Circuit for use in the detection of the condition of an isolated switch contact
JPS5294249A (en) Plastic bowling pin
JPS56130780A (en) Fixing device
DE3170043D1 (en) Switch device for use on circuit board
JPS57135934A (en) Malfunction preventing device for interchangeable finder
JPS57124332A (en) Flash apparatus equipped with reflector recess for circuit board switch
JPS57150839A (en) Strap detachable and attachable device
JPS55115233A (en) Stable electromagnetic device with auxiliary switch
YU276281A (en) Miniaturized push-button switch with sliding contacts
SU705558A1 (en) Switching arrangement built around magnetically controlled contacts
JPS5581426A (en) Slide switch with shorting contact