United States Patent [191 [11] Patent Number: 5,063,402 _ Shimada et al. [45] Date of Patent: Nov. 5, 1991

[54] APPARATUS FOR RETRACI‘ING A [56] References Cited PHOTO-TAKING LENS U.S. PATENT DOCUMENTS [75] Inventors: Takahisa Shimada; Toshio Yamaki, 4,348,089 9/1982 Shenk ...... 354/400 4,374,613 2/1983 Stempeck ...... 354/l95.l3 both of ; Kenji Tsuji, 4,743,931 5/1988 Matsuzaki et al...... 354/400 ; Masaaki Nakai, Kawachinagano; Akihiko Fujino; FOREIGN PATENT DOCUMENTS Hiroshi Ootsuka, both of , all of ' 59-123822 7/1984 . Japan 60-78432 5/1985 Japan. [73] Assignee: Minolta Camera Kabushiki Kaisha, Primary Examiner—W. B. Perkey Osaka, Japan Attorney, Agent, or Firm-Burns, Doane, Swecker & Mathis [21] Appl.No.: 602,911 [57] ABSTRACI‘ A lens retracting apparatus for a photo-taking device [22] Filed: Oct. 23, 1990 which comprises an interchangeable photo-taking lens, a main switch selectively switchable between an ON position for enabling an operation of the photo-taking Related U.S. Application Data device and an OFF position for inhibiting the operation [63] Continuation of Ser. No. 563,950, Aug. 7, 1990, aban of the camera, a focus detecting unit, a drive unit for doned, which is a continuation of Ser. No. 421,300, selectively retracting and extending a focusing lens of Oct. 10, 1989, abandoned, which is a continuation of the photo-taking lens toward an in-focus position on the Ser. No. 196,817, May 17, 1988, abandoned, which is a basis of a result of focus detection carried out by the continuation of Ser. No. 66,764, Jun. 25, 1987, aban focus detecting unit, a discriminating unit for determin doned. ing whether or not the photo-taking lens is retracted to a predetermined position, and a control means for driv [30] Foreign Application Priority Data ing the drive unit to retract the photo-taking lens only Jun. 25, 1986 [JP] Japan ...... 61-150478 by switching off the main switch and also for stopping the drive unit when a condition in which the photo-tak [51] Int. Cl.5 ...... G03B 13/36 ing lens is retracted to the predetermined position is [52] U.S.Cl...... 354/400 determined by the discriminating unit. [58] Field of Search ...... 354/400, 402, 195.1, 354/1951], 195.12, 195.13, 187, 401 23 Claims, 24 Drawing Sheets

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