JPH0334743Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a hand-cranked slide in which a large number of slide frames are partitioned around the periphery of a disc, and the slide disc is fitted onto an intermittent rotating shaft and rotated by a constant rotation angle. The present invention relates to film discs for use in commercial applications.

Conventional slide films have the disadvantage that the periphery of each film is fixed to a separate frame member, which makes it expensive to produce and cannot be produced at a low cost.Continuous projection is not possible, and therefore it is difficult to produce moving images. I can't get it out.

Furthermore, unless a special projector is used, it is impossible to feed the film backwards.

The present invention provides an inexpensive slide film disk that can easily perform not only normal slide projection but also continuous projection and reverse projection by forming the slide film around the periphery of the transparent disk. Furthermore, the slide film disk can be easily attached and detached from the manual projector even by a young person.

To explain this with reference to the figure, 1 is a film disc made of a transparent material, and has a thickness of about 100 μm, for example.
It is constructed from biaxially oriented thin polypropylene sheets.

A plurality of film screens 2a, 2b, . . . are radially provided around the circumference of the disk 1 at equal angular intervals. 3 is the part other than the film screen,
It is made opaque with black etc.

The film screen 2a . . . and the opaque portion 3 are formed by, for example, color gravure printing in four colors on the surface of the disc 1.

A square hole 4 for inserting the rotating mounting shaft of the projector is bored in the center of the disc 1, and slits 5 are formed extending each side of the square hole to facilitate insertion into the rotating shaft. It is designed to be able to be placed securely and securely.

The content of the film screen, for example, shows the growth of a plant, from seed germination to flowering and setting seeds.

The projector to which the film disc 1 is mounted is as shown in FIGS. It is rotated intermittently by a handle 9, and a lamp 6 as a light source is turned on only while the film disc 1 is stopped.

In the present invention, since the film is formed in the form of a film disk and is easily movable, it is preferable to fix the regulating piece 21 at least on the outside of the armature 7 to regulate this movement.

Reference numeral 8 denotes an intermittent rotation mechanism, which is composed of a pin wheel 10 and a Geneva gear 11 which are pivotally attached to a handle 9. 1
2 is a pin, and 13 is a cam surface having a substantially semicircular arc shape.

Reference numeral 14 indicates a protruding tooth of a Geneva gear, and reference numeral 15 indicates a concave portion, which is intermittently rotated by a pin 12 by one tooth, that is, one frame of the film, in one rotation of the pin wheel. The end face of the slide film disc mounting shaft 16 has a square hole 4.
It is formed into a rectangle to match the .

20 is a battery; one end is in contact with the lamp socket, and the other end is in contact with the fixed contact 17; an actuating bullet 18;
is connected to.

In the above-mentioned main slide, when the film disc 1 is fixed to the mounting protrusion and the handle 9 is rotated, the Geneva gear 11 is rotated one tooth at a time by the rotation of the pin wheel, and the film screen 2 corresponds to the armature 7. It is positioned and rotated intermittently. The pin wheel rotates continuously, but during the period when the Geneva gear is not driven, that is, when the film screen is stopped, the outer cam surface 13 of the pin wheel presses the operating bullet 18 against the fixed contact 17, so the lamp 6 It lights up and projects the film onto the screen.

This product has film screens that are related in content or that show continuous changes arranged in a circumferential manner on a single film disk, so when it is rotated at high speed, it looks like a slow motion screen. The film can be used for various teaching materials because it can stop the film rotation and can also be rotated in the opposite direction. Furthermore, since the film disk can be attached and detached almost instantly, content that requires multiple screens can be easily edited.

Furthermore, the film screen of the present invention does not have the periphery of the film fixed to a separate member as in the past, but is itself constructed within a transparent thin plate, and the remaining portion is made opaque, so it can be produced in large quantities at low cost. Therefore, it is suitable as a teaching material.

[Brief explanation of the drawing]

FIG. 1 is a front view of the slide disk, FIG. 2 is a partially cutaway front view of the product with the slide disk removed, and FIG. 3 is a sectional view taken along line AA in FIG. 2. 1 is a film disk, 8 is an intermittent rotation mechanism, and 10 is a pin wheel.

Claims (1)

[Scope of utility model registration request] This is a slide film disc that is attached to a rotary mounting shaft with a rectangular end face of a projector that rotates intermittently manually, and the disc is composed of a transparent thin plate, and the discs are arranged radially at equal angular intervals around the circumference. A film screen is formed, a portion other than the film screen is made opaque, and a square hole is bored in the center of the disc for fitting the mounting shaft, and each side of the square hole is further extended by a slit. A film disc for hand-cranked slides.