JPH02734Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention allows the camera user to move the pieces in the camera roll film cartridge by shaking the camera itself without opening the back cover of the camera. This cartridge relates to a camera roll film cartridge capable of confirming whether or not a film is loaded by the sound generated when the cartridge hits a wall in a hollow channel when moving.

(Conventional technology) Conventional camera roll film cartridges are
The situation was as shown in Figure 3. That is, a roll film is assembled into a roll film winding shaft for a camera, and is covered with a cover to prevent light from entering.

(Problem that the invention is trying to solve) This conventional camera roll film cartridge is loaded into the camera, and after closing the back cover of the camera, the shutter is pressed and each time a film is taken, the cartridge is rolled up by the film winding device. It was meant to advance one frame of the film.

However, for the majority of cameras, once the back cover of the camera is closed, the shutter will shut off regardless of whether or not there is film loaded inside.
The film winding device operates.

In other words, as if you were loading film,
I have often had the experience of pressing the shutter button to take a picture, only to open the back of the camera later to find that no film was loaded.

This has an important meaning from the empirical rule that it is impossible to photograph the same subject.

This invention solves the above-mentioned problems of conventional ones and provides a cartridge for camera roll film that allows anyone to easily check whether camera roll film is loaded in the camera. The purpose is to

(Means for solving the problem) In order to achieve this purpose, this invention has the following structure. That is, the patrone according to this invention has a hollow passage provided in a part of the conventional cartridge, and a spherical piece or the like is interposed in the hollow passage.

(Function) To check whether camera roll film is loaded in the camera, shake the camera before pressing the shutter; the pieces in the camera roll film cartridge will move left and right; Check whether the film is loaded or not by the sound it makes when it hits the wall in the airway.

(Example) An example of this invention will be described with reference to the drawings.

- First Example A first example of this invention will be described with reference to FIG. A hollow passage part 2 is provided in a part of the winding shaft 1 of the camera roll film cartridge of the first embodiment, and a small piece 3 is interposed in the hollow passage part 2, which can easily move from side to side within the hollow passage part 2. has been done.

A film is wound around the winding shaft 1 shown above, covered with the cover 4 of the camera roll film cartridge, and sealed to complete the camera roll film cartridge. At the time of use, when the cartridge is loaded into the camera and the camera is shaken at appropriate times, the loading of the film can be confirmed by the sound when the frame 3 hits the wall inside the cavity 2.

- Second Embodiment A second embodiment of this invention will be described with reference to FIG. In the second embodiment, a cover 4 of a camera roll film cartridge is designed to have a structure that produces sound. That is, a thick part 5 is provided in a part of the cover 4 of the camera roll film cartridge, a part of the thick part 5 is made into a hollow passage 2, and a piece 3 having a spherical shape or the like is interposed in the hollow passage 2. There is.

Even in the second embodiment, loading of the film can be confirmed in the same manner as in the first embodiment.

(Effects of the Invention) By loading the camera roll film cartridge according to this invention into a camera, it is possible to reliably and easily prevent the shutter from being pressed blankly.

Furthermore, since the sound-producing structure is provided inside the winding shaft 1 and the cover 4, there is no need to create a new space outside the cartridge, and this is no different from the conventional method of loading a camera roll film cartridge into the camera. Never.

[Brief explanation of the drawing]

FIG. 1: A front center vertical cross-sectional view of a winding shaft of a camera roll film cartridge showing a first embodiment of this invention. FIG. 2: A front center vertical sectional view of a cover of a cartridge for camera roll film showing a second embodiment of the invention. FIG. 3: An exploded perspective view showing a conventional example. 1... Camera roll film cartridge winding shaft, 2, 2... Skyway section, 3, 3... Piece, 4...
Camera roll film cartridge cover, 5
...thick part.

Claims (1)

[Claims for Utility Model Registration] 1. A cartridge for camera roll film that has a structure that makes a sound when shaken. 2. A camera roll film according to claim 1 of the utility model registration claim, in which a part of the winding shaft 1 of a cartridge for camera roll film is formed into a hollow passage 2, and a piece 3 such as a spherical piece is interposed in the hollow passage 2. Patrone for. 3. A thick part 5 is provided in a part of the cover 4 of the camera roll film cartridge that encloses the winding shaft 1 of the camera roll film cartridge, and a part of the thick part 5 is made into a hollow passage 2. 2. A camera roll film cartridge according to claim 1, wherein a spherical piece 3 is interposed within the camera roll film cartridge 2.