Fuji Photo Film Company, Limited

Mitsuyoshi Mochida

Hiroshi Ohmura

Nobuyuki Kameyama

Seimei Ushiro

Toshio Yoshida

Seiji Asano

Hisashi Takei

Junichi Takagi

Yukitsugu Hata

Takashi Imamura

Keiji Uchiyama

Katsumi Motomura

Yasuo Matsumoto

Shigeru Sugimoto

Tokuo Maekawa

Yoshihiko Nakamura

Kazuo Okoyama

Katsuji Muramatsu

Hisashi Tasaka

A lens-fitted photographic film unit has a picture frame size changing mechanism for changing the size of picture frames between a full size and a panoramic size. The picture frame size changing mechanism includes upper and lower exposure aperture masking plates which are pivotally mounted in a light-shielding box in front of an exposure aperture. The masking plates are interconnected to each other through one-side contact and urged by a tension spring toward a full size position. The upper masking plate is connected to an operation knob through a crank lever and a switching lever. When the knob is operated to select the panoramic size, the switching lever is moved over a necessary amount for moving the masking plates in a panoramic size position to mask the exposure aperture. After the masking plates are stopped in the panoramic size position by stoppers, the over-stroke of the switching lever is absorbed by resilient bending of the crank lever.

Lens-fitted photographic film unit

A lens-fitted photo film unit has an electronic flash device (11, 30; 115) with a printed circuit board (173). The flash device includes a flash-emitting section (6, 170) for emitting flash light toward a photographic field, and a main capacitor (31, 155) for storing charge to be discharged in the flash-emitting section. The printed circuit board converts a current of a battery (12, 127) into a current of high voltage to be supplied to the main capacitor. The printed circuit board has a transistor (13, Tr1) for oscillation. A primary winding (15) has one end connected to the battery, and another end connected to a collector of the transistor. A secondary winding (16) is combined in mutual induction with the primary winding, has one end connected to the main capacitor, and another end connected to a base of the transistor. A tertiary winding (17) is combined in mutual induction with the secondary winding, has one end connected to the battery, and another end connected to the base of the transistor. An LED (21, 180) has a cathode connected to the one end of the tertiary winding with the battery, and an anode connected to the another end of the tertiary winding opposite to the battery. The LED is driven to emit light in response to charging of the main capacitor at a predetermined level. In a preferred embodiment, the photo film unit is pre-loaded with photo film (123) having speed of ISO 800 or higher, to allow the main capacitor to have small capacitance adapted to the high speed of the photo film.

Lens-fitted photo film unit and electronic flash device for use therewith

A lens-fitted photo film unit has an electronic flash device (11, 30; 115) with a printed circuit board (173). The flash device includes a flash-emitting section (6, 170) for emitting flash light toward a photographic field, and a main capacitor (31, 155) for storing charge to be discharged in the flash-emitting section. The printed circuit board converts a current of a battery (12, 127) into a current of high voltage to be supplied to the main capacitor. An LED is driven to emit light in response to charging of the main capacitor at a predetermined level. The flash-emitting section is arranged to be slidably disposed on said printed circuit board.

A lens-fitted photo film unit has an electronic flash device with a flash circuit board. The flash device includes a flash-emitting section for emitting flash light toward a photographic field, and a main capacitor for storing charge to be discharged in the flash-emitting section. The flash-emitting section and main capacitor together constitute a flasher/capacitor unit. In one embodiment, a detachable connector, providing both the electrical connection and the mechanical support, connects the flasher/capacitor unit to the flash circuit board. In another embodiment, a securing portion comprising a pair of rails disposed on the flasher/capacitor unit, secures the flasher/capacitor unit to the flash circuit board, where the rails ride along opposite sides of a projecting portion of the flash circuit board.

A lens-fitted photographic film unit whose film surface disposed behind an exposure aperture is forwardly concave along the longitudinal direction of the film strip so as to correct distortion by the taking lens. The unit has an exposure aperture size changing device constituted of a manually actuated photography mode changing member for selecting either a standard photography mode for forming a standard size picture frame, or a special photography mode in which a special size picture frame smaller than the standard size picture frame may be formed. A pair of aperture masking plates is movable into margins of the exposure aperture, for masking out parts of the exposure aperture. The masking plates have such shapes that, if images of the aperture masking plates are projected onto a plane perpendicular to an optical axis of the taking lens in the masking position, the images have concave top and bottom margins, so that the special size picture frame has a rectangular shape when the images of the masking plates are projected on that concave film surface instead of on that perpendicular plane.

Lens-fitted photographic flim unit and exposure aperture size changing

A lens-fitted photographic film package includes a light-tight film case with a taking lens fitted thereto, an empty film container enclosed in the light-tight film case, and a rolled film with its one end retained in the empty film container enclosed in the light-tight film case. The light-tight film case is provided with a portion openable to form an opening in the light-tight film case through which the film container, e.g. a standard film patrone having a spool, is removed in an axial direction.

Lens-fitted photographic film package

A lens-fitted photographic film package comprising a light-tight film casing having an exposure opening, a rolled film disposed on one side of the exposure opening in the light-tight casing, a removable light-tight container having a film winding spool therein disposed on the other side of the exposure opening in the light-tight film casing, and an externally operable film winding member for winding the rolled film around said film winding spool of the light-tight film container. The lens-fitted photographic film package is assembled by the steps of winding film withdrawn from a light-tight film container in a roll in a darkroom; loading the rolled film and the light-tight film container in separate respective receiving chambers formed in a main body section of the lens-fitted photographic film package; and fixing a back cover section to the main body section so as to assemble light-tightly the lens-fitted photographic film package.

Growing community of inventors

Tokyo, Japan

Mitsuyoshi Mochida