JP2541203B2 - Film transfer display for camera - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a film feed display device for a camera, and more particularly to a display device capable of clearly recognizing a film feed state.

[Prior art and its problems]

When using the camera, the photographer is worried about whether the film has been reliably fed when winding the film,
Conventionally, various display devices have been adopted to display the film feeding state. An example is shown in FIG.

In the figure, a sprocket 52 is fixed to the lower end and a film feeding / indicating member 54 is fixed to the upper end of a rotary shaft 50 rotatably arranged near the film F. The sprocket 52 is fitted into the perforation 56 of the film F, and the display member 54 has a round bar portion 56 with a predetermined pattern 58. A display window member 60 is arranged in the vicinity of the display member 54, and the photographer can confirm the rotation of the display member 54, that is, the film feeding from here.

This conventional example has a small number of parts and a relatively simple structure, and has an advantage that it does not occupy a lot of space, but there is room for improvement. That is, in order to make it easier to confirm the rotation of the round bar portion 56, it is necessary to print a pattern directly on it, or wind another member on which the pattern is printed, etc., which increases the cost of the feeding display device. It connects.

The present invention solves the above-mentioned problems in the conventional example, that is, a film feeding display device that can observe the feeding state of a film accurately even though it has a simple structure, and that the cost does not increase so much. It was made for the purpose of providing.

[Means and actions for solving problems]

In order to achieve the above object, in the present invention, the entire display member (the portion corresponding to the main body and the portion corresponding to the pattern) is integrally molded with plastics or the like and fixed coaxially with the sprocket shaft. The display member includes, for example, a pair of holding portions that are spaced apart from each other, and a plurality of pillar portions that extend between the holding portions in a direction substantially perpendicular to the rotation direction of the display member.

By doing so, the pattern (column portion) is also molded at the same time when the display member is molded, and it is not necessary to provide only the pattern in a separate step later.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a film cartridge, which is arranged in a chamber (not shown). A spool 12 which is rotated by a driving force is arranged at a fixed distance from the cartridge 10, and the film F drawn from the cartridge 10 is wound on this spool 12.

A rotary shaft 16 is arranged rotatably around an axis parallel to the plane of the film F in the vicinity of the film F, and a sprocket 20 fitted into a perforation 18 of the film F is fixed to the lower end of the rotary shaft 16. A film feeding display member 22 is fixed to the upper end.

The display member 22 is made of a light-colored (eg, yellow) plastic material that floats on a dark background, and as shown in detail in FIGS. 2 and 3, a pair of upper and lower disc-shaped holding members 24 and 26.
And four columnar portions 28, 30, 32, and 34 extending between them are integrally formed. Both holding portions 24 and 26 have the same shape and are parallel to each other, and the four columnar portions 28 to 34 have a rectangular shape and are arranged with a phase of 90 °.

A display window member 38 is arranged close to the display member 22. The window member 38 is made of a transparent plastic material and has a flat plate shape as a whole. On the surface of the window member 38 facing the display member 22, three upper, middle and lower portions 40, 42 and 44 are formed as shown in FIGS. The upper and lower parts 40 and 44 have a plurality of prisms 45 having a cross-sectional shape as shown in FIG. 6, and the middle part 42 has a plurality of prisms.
Reference numeral 43 has a cross-sectional shape as shown in FIG. 5 (opposite direction to the plurality of prisms 45).

 Next, the operation of this embodiment will be described.

When the spool 12 is rotated by the winding force, the film F is sequentially wound around it. When the film F is fed, since the sprocket 20 is fitted in the perforation 18, the sprocket 20 or the feeding display member 22 rotates, and the photographer rotates the display member 22, that is, the pillar portions 28 to 34.
Will be observed from the display window member 38. Here, the window member 38 is composed of three parts 40, 42 and 44, and in the upper and lower stages of the window member 38, as shown in FIG.
The thickness and spacing of 34 appear to expand due to the function of the prism, and in the middle part of the window member 38, as shown in FIG.
The thickness and spacing of 34 appear to be narrowed by the function of the prism. Due to this difference, the photographer can accurately observe that the sprocket 20 is rotating, that is, the film F is being fed.

Moreover, since the display member 22 is formed by integrally molding plastic, it is easy to mold, and it is not necessary to print or attach another member to form a pattern as in the conventional example. Is extremely easy.

The present invention should not be construed as being limited to the above-described embodiments, but can be modified and improved within a range not impairing the gist thereof. For example, the shapes and the numbers of the pillar portions 28 to 34 of the display member 22 and the configurations of the prism portions 40 to 44 of the window member 38 can be arbitrarily selected.

For example, the part corresponding to the pattern does not have to be columnar, but a rectangular plate is erected on a disc as shown in FIG.
221 or 220 with a hemisphere fixed on a disc as shown in FIG. 11, 223 with a ring standing on the disc as shown in FIG. 12, or a circle as shown in FIG. The plate 222 may be an S-shaped member fixed on the plate 222.

〔The invention's effect〕

As described above, according to the present invention, since the entire display member is formed by an integrally molded product, the manufacturing cost is reduced, and at the same time, the extending column portion is formed in the direction perpendicular to the rotation direction. It is not necessary to apply a pattern in a separate process, which also leads to cost reduction. Further, if the rotating state of the display member is observed through the display window, the rotating state can be observed more clearly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view of an essential part thereof, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. 4 is a front view of an essential part of FIG. Fig. 5 and Fig. 5 are B in Fig. 4.
-B sectional drawing, FIG. 6 is CC sectional drawing in FIG. 7 and 8 are operation explanatory views of the above embodiment. FIG. 9 is a perspective view of an essential part showing one of the conventional examples. First
FIG. 10 to FIG. 13 are perspective views of essential parts showing another embodiment of the present invention. [Explanation of symbols of main parts] F …… film, 38 …… display window part 10 …… patrone, 40,42,44 …… prism 12 …… spool, 20 …… sprocket 22 …… display member, 28,30 , 32,34 …… Pillar part

Front page continuation (72) Inventor Koji Kobayashi 1-6-3 Nishioi, Shinagawa-ku, Tokyo Inside Nihon Optical Co., Ltd. Oi Manufacturing Co., Ltd. (56) References 59-82224 (JP, U) Sumi 39-4357 (JP, Y1)

Claims (2)

(57) [Claims] 1. A perforation (1) of a film (F).
A sprocket (20) that engages with 8) and rotates with the movement of the film; a shaft portion (16) whose one end is fixed to the rotation center of the sprocket so as to be coaxial with the sprocket; A display part (22) integrally formed with the shaft part by plastics at the other end part of the part, wherein the display part is formed by rotating around a rotation axis of the shaft part. A film transfer display device for a camera, which has a non-rotating body shape different from the above shape. 2. A display window member (38) is disposed in the vicinity of the display section (22), and the display window member is composed of a plurality of types of prisms (43, 45). A film transfer display device for a camera according to claim 1.