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FR2401439A1 - Declencheur electromagnetique, en particulier pour la manoeuvre d'un obturateur d'appareil photographique - Google Patents

Declencheur electromagnetique, en particulier pour la manoeuvre d'un obturateur d'appareil photographique

Info

Publication number
FR2401439A1
FR2401439A1 FR7823672A FR7823672A FR2401439A1 FR 2401439 A1 FR2401439 A1 FR 2401439A1 FR 7823672 A FR7823672 A FR 7823672A FR 7823672 A FR7823672 A FR 7823672A FR 2401439 A1 FR2401439 A1 FR 2401439A1
Authority
FR
France
Prior art keywords
electromagnet
branch
spring
permanent magnets
trigger
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
Application number
FR7823672A
Other languages
English (en)
Other versions
FR2401439B1 (fr
Inventor
Kazuyuki Nemoto
Mitsuo Kawazoe
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.)
Olympus Corp
Original Assignee
Olympus Optical 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
Priority claimed from JP52101375A external-priority patent/JPS6022805B2/ja
Priority claimed from JP13271177A external-priority patent/JPS6022806B2/ja
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Publication of FR2401439A1 publication Critical patent/FR2401439A1/fr
Application granted granted Critical
Publication of FR2401439B1 publication Critical patent/FR2401439B1/fr
Granted 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
    • G03B17/38—Releasing-devices separate from shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnets (AREA)
  • Shutters For Cameras (AREA)

Abstract

L'invention concerne un déclencheur électromagnétique, en particulier pour la manoeuvre d'un obturateur d'appareil photographique, comportant un électro-aimant en fer à cheval 32 dont une branche 38a de la culasse 38 porte une bobine déclencheuse 39, et un corps mobile 31 porteur d'aimants permanents 34, 35 le maintenant appliqué à l'électro-aimant quand la bobine n'est pas excitée, l'excitation de cette dernière engendrant dans l'électro-aimant un flux magnétique opposé à celui des aimants permanents permettant au corps 31 de se séparer de la branche 38a de l'électro-aimant sous l'action d'une bielle porteuse 43, rappelée par un ressort 45, pivotant sur un axe 44 dont la rotation actionne les organes de commande du mécanisme associé; l'intensité des divers champs magnétiques et l'élasticité du ressort sont liées par des rapports facilitant ces mouvements.
FR7823672A 1977-08-23 1978-08-11 Declencheur electromagnetique, en particulier pour la manoeuvre d'un obturateur d'appareil photographique Granted FR2401439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP52101375A JPS6022805B2 (ja) 1977-08-23 1977-08-23 拘束解除用電磁石装置
JP13271177A JPS6022806B2 (ja) 1977-11-04 1977-11-04 釈放型電磁石装置

Publications (2)

Publication Number Publication Date
FR2401439A1 true FR2401439A1 (fr) 1979-03-23
FR2401439B1 FR2401439B1 (fr) 1982-10-29

Family

ID=26442257

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7823672A Granted FR2401439A1 (fr) 1977-08-23 1978-08-11 Declencheur electromagnetique, en particulier pour la manoeuvre d'un obturateur d'appareil photographique

Country Status (3)

Country Link
DE (1) DE2836705C2 (fr)
FR (1) FR2401439A1 (fr)
GB (1) GB2003327B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6002317A (en) * 1998-04-13 1999-12-14 Walker Magnetics Group, Inc. Electrically switchable magnet system
DE10159510A1 (de) * 2001-12-04 2003-06-12 Welcker F Vereinfachte Sicherungseinrichtung für Gasanwendungsanlagen
DE102004034296B3 (de) * 2004-07-06 2005-06-23 Saia-Burgess Dresden Gmbh Elektromagnetischer Aktuator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914723A (en) * 1974-07-15 1975-10-21 Price Edison Inc Positive action magnetic latching relay
DE2501629A1 (de) * 1974-01-18 1975-12-11 Canon Kk Elektromagnetische freigabevorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047848A (en) * 1962-08-09 1966-11-09 H E & B S Benson Ltd Improvements in d.c. electromagnets with permanentmagnet armatures
DE2654111A1 (de) * 1975-12-11 1977-06-16 Minolta Camera Kk Magneteinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2501629A1 (de) * 1974-01-18 1975-12-11 Canon Kk Elektromagnetische freigabevorrichtung
US3914723A (en) * 1974-07-15 1975-10-21 Price Edison Inc Positive action magnetic latching relay

Also Published As

Publication number Publication date
FR2401439B1 (fr) 1982-10-29
GB2003327B (en) 1982-02-10
GB2003327A (en) 1979-03-07
DE2836705C2 (de) 1984-10-31
DE2836705A1 (de) 1979-03-08

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Legal Events

Date Code Title Description
ST Notification of lapse