JPS56128959A - Buffer device - Google Patents

Buffer device

Info

Publication number
JPS56128959A
JPS56128959A JP3193180A JP3193180A JPS56128959A JP S56128959 A JPS56128959 A JP S56128959A JP 3193180 A JP3193180 A JP 3193180A JP 3193180 A JP3193180 A JP 3193180A JP S56128959 A JPS56128959 A JP S56128959A
Authority
JP
Japan
Prior art keywords
movable part
impulsive force
support plates
slide shaft
lens
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
JP3193180A
Other languages
Japanese (ja)
Inventor
Yoshio Hashimoto
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP3193180A priority Critical patent/JPS56128959A/en
Publication of JPS56128959A publication Critical patent/JPS56128959A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To reduce impulsive force when a movable part collides against a support plate, by providing the movable part, which holds and puts the lens of a copier in linear motion on a slide shaft, with an operating conic coil spring. CONSTITUTION:Movable part 5 including a lens, while sliding on slide shaft 6, reciprocates linearly through a linear motor. Slide shaft 6 is supported by support plates 7a and 7b at both ends and at direction transition positions of movable part 5, i.e. both end parts of slide part 6, conic coil springs 8a and 8b are installed outside driving range (l) of movable part 5. On support plates 7a and 7b, the linear motor for operating movable part 5 is installed. Then, impulsive force F of movable part 5 to support plates 7a and 7b is in proportion to the momentum that the movable part has colliding against a buffer material and in inverse proportion to time DELTAt up to the stop of the motion. Therefore, the impulsive force can be decreased by prolonging DELTAt by using the conic coil spring.
JP3193180A 1980-03-13 1980-03-13 Buffer device Pending JPS56128959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3193180A JPS56128959A (en) 1980-03-13 1980-03-13 Buffer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3193180A JPS56128959A (en) 1980-03-13 1980-03-13 Buffer device

Publications (1)

Publication Number Publication Date
JPS56128959A true JPS56128959A (en) 1981-10-08

Family

ID=12344710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3193180A Pending JPS56128959A (en) 1980-03-13 1980-03-13 Buffer device

Country Status (1)

Country Link
JP (1) JPS56128959A (en)

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