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Photographic film device with camera lens

A photographic film and lens technology, applied in the field of photographic film devices, can solve problems such as incorrect film loading and the like

Inactive Publication Date: 2006-02-08
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Users may incorrectly load film on cameras with used cassettes

Method used

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  • Photographic film device with camera lens
  • Photographic film device with camera lens
  • Photographic film device with camera lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0138] A reduction ratio between the top gear 78a and the counter gear 79 is an example of 8 / 30. The joint garden diameter D=5.4mm of bottom gear 78b, modulus m=0.3, number of teeth Z=16. If the film 12 can be exposed 25 times, the amount of rotation of the take-up reel 10 required to wind the photo film 12 in its entirety is estimated to be 29 revolutions. The amount of rotation of the counter gear 79 is determined as follows:

[0139] 8 / 30×22.5×29=174(°)

[0140] Accordingly, the counter gear 79 will have the marking 79a and the detector notch 83 rotated 174 degrees from the activated position of the counter gear 79 .

[0141] If the photo film 12 being stored has a different frame number available, or contains photo film bases of different materials, the amount of rotation of the take-up wheel 10 required to wind the photo film 12 fully into the cassette shell 13 will vary. However, the counter gear 79 can be modified by changing the positions of the m...

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PUM

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Abstract

A lens-fitted photo film unit is pre-loaded with a photo film of a predetermined length. The photo film is retained on a spool. A winder wheel is connected to the spool. After each frame is exposed on the photo film, the winder wheel is manually rotated to wind the photo film into a cassette shell about the spool. In the lens-fitted photo film unit, a combination of a detector cutout and a protruded portion detects that the winder wheel has made a predetermined number of rotations, which depends upon the predetermined length of the photo film. A combination of a recess and a protruded portion locks rotation of the winder wheel in response to rotation of the winder wheel to a predetermined rotational position after the predetermined number of the rotations of the winder wheel. The winder wheel is inhibited from being rotated after the photo film is entirely wound into the cassette shell.

Description

technical field [0001] The present invention relates to a lens-fitted photo film unit. More particularly, it relates to a lens-fitted photo film unit preloaded with a photo film cartridge in which the photo film cartridge can be safely removed after exposure. Background technique [0002] A simple exposure structure is provided on a lens-fitted photo film unit preloaded with a photo film cassette. Photo film is stored in the lens-fitted photo film unit with the tail of the photo film fixed on a shaft. The shaft is rotatably disposed in a cassette. After each exposure, a take-up wheel connected to the shaft is rotated to wind the exposed portion of the photographic film into the cassette. The cassette can be removed from the lens-fitted photo film unit in a bright room without being in a dark room. A lens-fitted photo film unit having a cartridge case formed of a resin material, comprising a photo film, wherein the operation of inserting the photo film into the lens-fitte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B19/04G03B1/60G03B17/02G03C3/00G03B1/62G03B17/36
CPCG03B17/36G03B19/04G03B1/62
Inventor 森谷光宏三上勇志
Owner FUJIFILM CORP