JPH0314655Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a film projection device, and is suitable for use when projecting an image on a film whose negative base and positive base are peeled off after projection (this is called a peel-off type film). .

There are two methods for fixing photographed images on peel-off films: the diffusion transfer method and the color diffusion transfer method.This transfer process is performed within the film, and when the transfer process is completed, the film is It is necessary to dry the layer.
Therefore, in the past, even when a film that has been photographed was immediately placed on a film projection device and the user wanted to view the photographed content, there was the inconvenience of having to wait at least the drying time for the film to be projected.

This idea was created taking the above points into consideration.
We would like to propose a film projection device that has a film drying function so that the film can be loaded onto the film loading section immediately after shooting without waiting for the drying process, and drying and projection can be easily performed as needed. Therefore, the present invention uses the heat generated by an incandescent lamp, which is originally prepared as a light source for film projection, to create hot air to dry the film. To enable film projection.

An embodiment of the present invention will be described in detail below with reference to the drawings. In the figure, reference numeral 1 denotes an incandescent lamp, such as a halogen lamp, as a light source for film projection.
An incandescent lamp 1 is provided in a lamp housing 2, and the light source light generated from the filament 3 is reflected by a half mirror 6 through a condensing lens 5 provided in an outlet tube portion 4 of the housing 2, for example. The film is bent by 90 degrees and sent to the film loading section 7.

The film mounting section 7 is configured to hold the film 8 so as to receive the light from the light source at an angle of approximately 90 degrees, and the half mirror 6 uses the reflected light obtained from the image appearing on the surface of the film 8 as projected image light.
In this way, the projected image light passes straight through this half mirror 6, passes through a projection lens 9, and is projected onto a screen (not shown). Note that 10 is an absorption plate.

In addition to the above configuration, the film projection apparatus has the following configuration for drying the film 8. That is, a blower tube section 15 is provided at a position opposite to the outlet tube section 4 of the lamp housing 2, and a fan 16 is disposed in the blower tube section 15. The fan 16 sucks air from outside the lamp housing 2 as shown by the dotted line, heats it by passing it around the incandescent lamp 1 in the lamp housing 2, and then sends out hot air from the outlet tube 4 to the air passage 18. It is made to be. 16X is a switch serving as an on/off driving means for turning the fan 16 on and off.

In the case of this embodiment, the condensing lens 5 is provided with an air hole, and a ventilation groove 17 is formed in the peripheral portion where the condensing lens 5 is fixed to the outlet tube 4, so that the lamp housing 2 is heated. The air hits the half mirror 6 and is sent toward the film mounting section 7 in the same way as the light from the light source. Thus, the light guide tube, half mirror 6, etc. for sending the light source light to the film 8 constitute a blowing path 18 for sending hot air to the film 8.

The film mounting section 7 has an exhaust hole 20 around the surface of the film 8, and thus the lamp housing 2
After blowing the hot air sent from the film 8 onto the surface of the film 8, the hot air is discharged from the exhaust hole 20.

A rotary filter 21 is provided in the outlet tube portion 4 . The filter 21 includes a first filter section that passes only infrared rays, a second filter section that passes infrared rays and visible light, and a third filter section that passes only visible light, which are arranged in sequence in the circumferential direction. The rotary plate part 22 is composed of a rotary plate part 22 and a rotation switching part 23 coupled to this rotary plate part 22. The third filter section can be inserted in sequence.

In the above configuration, after the peel-off type film 8 that has been photographed is peeled off (that is, the negative base and the positive base are peeled off) and mounted on the film mounting section 7, the incandescent lamp 1 is turned on and at the same time the fan 16 is turned on by the switch 16X. to drive. At this time, hot air heated by the incandescent lamp 1 is blown onto the surface of the film 8 through the condenser lens 5 and the half mirror 6, and then exhausted to the outside through the exhaust hole 20. Therefore, the film 8 is rapidly dried by the hot air. However, if the processing process of the film 8 is still in the process of diffusion transfer and exposure is not desired, the first filter section that allows only infrared rays to pass through the rotary plate section 22 of the rotary filter 21 is inserted into the outlet tube section 4. This allows infrared rays to be sent through the half mirror in addition to hot air to help dry the film 8, but visible light is not sent to the film 8.

Thereafter, when the diffusion transfer step is completed, the rotary filter 21 is driven to insert the second filter section into the outlet tube section 4, which allows infrared rays and visible light to pass therethrough. At this time, the hot air continues to be blown onto the film 8 to continue drying it, assisting the drying process with infrared rays, and by sending visible light to the film 8 via the half mirror 6, the projection obtained by reflection from the film 8 is Image light is sent to the screen via a half mirror 6 and a projection lens 9. Therefore, the photographed image can be projected onto the screen while the film 8 is being dried.

After that, when the drying of the film 8 is completed, the fan 16 is stopped by the switch 16X, and the rotary filter 21 is driven to insert a third filter section into the outlet tube section 4 that allows only visible light to pass through. Switch to At this time, hot air is no longer sent to the film 8, and infrared rays are also no longer sent to the film 8, so that the film 8 is no longer dried.
By sending only visible light to the film 8, the original operation of the film projection device is performed and the image on the film 8 is projected onto the screen by the projection light.

According to the configuration shown in the figure, the film 8 can be dried with the film 8 mounted on the film mounting section 7, so that the drying of the film 8 and the projection of the projection light can be performed in accordance with the state of the film 8. can be executed simultaneously. Accordingly, overheating of the apparatus can be prevented by turning on the fan 16 as appropriate during projection after the film has been dried.

In the above description, an example is shown in which a film that does not transmit light is used, but the present invention can also be applied to a case where a film that transmits light is used. In this case, the transmitted light from the film may be projected through a projection lens.

As described above, according to the present invention, the film can be dried at the same time as the projected image light is projected by attaching the film immediately after shooting to the film mounting section, so that the film can be easily and time-efficiently dried and the projected light can be dried. Projection can be performed while adapting to the film condition.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an embodiment of a film projection device according to the present invention. 1...Incandescent lamp, 2...Lamp housing,
3...Filament, 4...Exit cylinder part, 5...Condensing lens, 6...Half mirror, 7...Film mounting part, 8...Film, 9...Projection lens, 1
6...Fan, 17...Blower groove, 18...Blower path, 20...Exhaust hole, 21...Rotary filter,
22...Rotary plate section, 23... Rotation switching section.

Claims (1)

[Claim for Utility Model Registration] Film projection in which light source light generated from an incandescent lamp housed in a housing is irradiated onto a peel-off type film mounted on a film mounting section, and projected image light obtained from the film is projected. In the apparatus, a fan that sends air into the housing, an on/off drive means that drives the fan on and off,
An air passage connecting the housing and the film mounting portion, and a filter provided so as to be inserted into the air passage are provided, and the light source light and the hot air sent out from the housing are passed through the air passage to the film. A film projection device characterized in that the incandescent lamp serves both as a light source for projection and as a heat source for drying the film.