JPH0181642U - - Google Patents

Description

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram of the structure of a film holder, and FIGS.
The figures are a perspective view and a plan view of the film remaining amount detecting device, respectively, and FIG. 4 is an explanatory diagram of the structure of the film remaining amount display section. 1: Camera body, 2: Film holder, 3: Film, 3a: Effective screen, 3b: Data imprinting section, 4: Film roll, 10: Dark box forming body, 1
2: exposure aperture, 20: film unit, 24
: Supply shaft, 25: Take-up shaft, 50: Rotation shaft, 51:
Detection lever, 52: Detection roller, 53: Detection lever biasing spring, 57: Remaining amount display board, 58: Display window, 59: Release lever, 61: Release lever biasing spring, 62: Pusher.

Claims (1)

[Scope of utility model registration request] In the apparatus for detecting the remaining amount of unexposed film, the apparatus is mounted on a film holder for a camera, comprising a film unit having a film supply shaft and a film take-up shaft, which is removably mounted on a dark box forming member. The dark box forming body is brought into contact with the outer peripheral surface of the film attached to the supply shaft by a first urging means,
A detection lever that rotates according to the amount of film remaining and a second biasing device that biases in the opposite direction with a stronger biasing force than the first biasing device act to remove the film unit. The film unit is further provided with a release lever for displacing the detection lever to the outside of the mounting portion of the film unit when the film unit is mounted on the dark box forming member. 1. A film remaining amount detecting device comprising a pusher which is moved in a direction to release the engagement therebetween.