JPS57207228A - Opening and closing mechanism for mirror shutter in photographing device for blackboard characters - Google Patents

Opening and closing mechanism for mirror shutter in photographing device for blackboard characters

Info

Publication number
JPS57207228A
JPS57207228A JP9234581A JP9234581A JPS57207228A JP S57207228 A JPS57207228 A JP S57207228A JP 9234581 A JP9234581 A JP 9234581A JP 9234581 A JP9234581 A JP 9234581A JP S57207228 A JPS57207228 A JP S57207228A
Authority
JP
Japan
Prior art keywords
shutter
solenoid
closing
mirror
mirror shutter
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
JP9234581A
Other languages
Japanese (ja)
Inventor
Takashi Sawara
Masakatsu Yamaguchi
Yoshitaka Fujikawa
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.)
Max Co Ltd
Original Assignee
Max 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 Max Co Ltd filed Critical Max Co Ltd
Priority to JP9234581A priority Critical patent/JPS57207228A/en
Publication of JPS57207228A publication Critical patent/JPS57207228A/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)
  • Cameras In General (AREA)
  • Shutters For Cameras (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Abstract

PURPOSE:To prevent the camera shake in the stage of photographing exposure on account of the oscillations generated when a mirror shutter closes by applying a voltage to a solenoid just prior to closing of the mirror shutter thereby attenuating the speed of the mirror shutter. CONSTITUTION:At the same instant when photographing paper 4 is transferred onto an exposure plate 10, a photographic paper feeder 3 stops. When a microswitch M is turned on cooperatively with this stoppage, a high voltage DC DCVH is applied upon a solenoid S which in turn opens a mirror shutter 5. Upon lapse of the exposure time, a timer relay T1 for shutter opening time operates to open a switch X1, then the high voltage DC DCVH applied upon the solenoid S annihilates, and the shutter 5 begins to be closed by its own weight or a spring. Just prior to the end of closing of the shutter 5, a timer relay T2 for absorbing the impact during the closing of the shutter operates and the charge of a capacitor C charged by a low voltage DC DCVL is discharged to the solenoid S, whereby the speed at which the shutter 5 ends closing is attenuated.
JP9234581A 1981-06-17 1981-06-17 Opening and closing mechanism for mirror shutter in photographing device for blackboard characters Pending JPS57207228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9234581A JPS57207228A (en) 1981-06-17 1981-06-17 Opening and closing mechanism for mirror shutter in photographing device for blackboard characters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9234581A JPS57207228A (en) 1981-06-17 1981-06-17 Opening and closing mechanism for mirror shutter in photographing device for blackboard characters

Publications (1)

Publication Number Publication Date
JPS57207228A true JPS57207228A (en) 1982-12-18

Family

ID=14051804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9234581A Pending JPS57207228A (en) 1981-06-17 1981-06-17 Opening and closing mechanism for mirror shutter in photographing device for blackboard characters

Country Status (1)

Country Link
JP (1) JPS57207228A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102937A (en) * 1977-02-22 1978-09-07 Unitika Ltd Remoistening hot-melt adhesive composition
JPS5624328A (en) * 1979-08-07 1981-03-07 Copal Co Ltd High speed electromagnetic shutter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102937A (en) * 1977-02-22 1978-09-07 Unitika Ltd Remoistening hot-melt adhesive composition
JPS5624328A (en) * 1979-08-07 1981-03-07 Copal Co Ltd High speed electromagnetic shutter

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