JPH02170151A - Image projection device - Google Patents

Abstract

PURPOSE:To easily send a negative film by supporting a negative carrier having flexing properties slidably in the longitudinal direction. CONSTITUTION:This device converges the light from a light source 1 and the light reflected by a reflecting mirror 2 by a condenser lens 3 to irradiate negative films in the negative carrier 5 supported by a negative carrier receiver 4, thereby projecting an image of one frame of a film outside through a lens 7. Then the carrier receiver 4 supports the carrier 5 in the longitudinal direction by a leaf spring. Further, the carrier 5 is made of a flexing material such as steel and plural opening parts 5a are formed to fix the film with projection parts 5b and recessed parts 5c.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to, for example, an image projection device.

(Prior Art) Conventionally, image projection devices have been put into practical use that project an image of a negative film onto a screen by irradiating the negative film with light from a light source. A copying machine has been developed that can form a projected image from such an image projection device on the document table of a copying machine and make copies. In this case, a mirror, a Fresnel lens for correcting uneven light distribution, and a screen are placed on the document table on the copying machine side, and the projected image projected from the image projection device is reflected by the mirror and placed on the document table. The light is guided to a screen through a placed Fresnel lens, and an image is formed on the screen.

However, in commonly used copying machines, the document table is provided horizontally with respect to the user, and the document cover opens in front of the user.

For this reason, the mirrors and the like are provided so as to reflect in a direction that is not obstructed by the document cover, that is, in a direction perpendicular to the direction in which the document cover is opened, and the projected image from the image projection device is projected from the side of the copying machine. It is now possible to do so.

For this reason, in an image projection apparatus that automatically feeds a negative carrier in the horizontal direction into which a negative film consisting of several frames is inserted, the direction of the projected image will be deviated by 90 degrees from the direction in which the document table is set.

As a result, without using such an automatic feed mechanism, by placing the negative film in a negative frame that stores one film at a time and setting it vertically, the projected image can be projected onto the screen on the document table in the appropriate direction. It is now possible to do so.

However, in this case, each frame of the negative film must be separated and placed in a negative frame, which has the drawbacks of being bulky and making it impossible to insert the negative film into an automatic enlarger. there were.

Furthermore, if it were to be possible to move the negative carrier in the vertical direction, holes would have to be made in the device, which would increase the price and reduce the cooling efficiency of the light source.

Therefore, there is a drawback that vertical feeding of a negative film having a plurality of frames cannot be easily realized.

(Problems to be Solved by the Invention) As described above, this invention eliminates the drawback that vertical feeding of a negative film having multiple frames cannot be easily realized, and makes it possible to easily vertically feed a negative film having multiple frames. The purpose is to provide an image projection device that can be realized.

[Structure of the Invention] (Means for Solving the Problems) In the image projection device of the present invention, light from a light source is irradiated onto the negative film to be projected, so that an image on the negative film to be projected is projected. The device is composed of a flexible negative carrier in which the negative film made up of the plurality of frames is stored, and a support mechanism that supports the negative carrier so as to be slidable in the vertical direction.

(Function) The present invention is a device in which an image on a negative film to be projected is projected by irradiating light from a light source onto the negative film to be projected, in which the negative film consisting of the plurality of frames is stored. A flexible negative carrier is supported slidably in the vertical direction.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an image projection apparatus A of the present invention.

That is, the light from the light source 1 and the light from the light source 1 reflected by the reflecting mirror 2 are condensed by the condenser lens 3, and the negative carrier 5 supported by the negative carrier receiver 4 is condensed by the condenser lens 3. Negative film inside (negative film for projection)
6 is irradiated. A single-frame image of the negative film 6 irradiated with this condensed light is projected to the outside via a lens 7 whose focal position is moved by a focusing mechanism (not shown). Further, a fan 8 for cooling the heat generated by the light source 1 is provided inside the device.

As shown in FIG. 2, the negative film 6 has a negative image developed on each frame, and sprocket holes 6a are provided at the upper and lower ends.

The negative carrier support 4 supports the end portion of the negative carrier 5 by a leaf spring (not shown), and supports the negative carrier 5 so as to be slidable in the vertical direction. The negative carrier 5 is made of a flexible member such as steel, and has openings 5a corresponding to each frame of the negative film 6, as shown in FIG.
, . . . are open, and the negative film 6 is sandwiched therebetween.

The negative carrier 5 has convex portions 5b provided corresponding to the sprocket holes 6a, . . . of the negative film 6.

. . . and the recessed portions 5 c s . . .

Therefore, when the negative carrier 5 is set on the negative carrier receiver 4 and moved in the vertical direction, the lower portion other than the negative surface to be projected is bent by the partition plate 9 of the main body, as shown in FIG. The frames of the negative film 6 stored on the upper side can face the negative carrier holder 4.

The projected image projected by the lens 7 of the image projecting device A is formed on a screen (not shown), or is formed on a mirror 12 placed on a document table 11 of a copying machine 10 as shown in FIG. , are projected (imaged) onto a screen 14 via a Fresnel lens 13. The image projected onto the screen 14 of the copying machine 10 is copied in the same manner as in a conventional copying operation.

As mentioned above, in a device in which an image on a negative film is projected by irradiating light from a light source onto the negative film, a flexible negative carrier that stores a negative film consisting of multiple frames is held vertically. Since it is supported so as to be slidable in the direction, vertical feeding of a negative film having a plurality of frames can be easily realized.

In addition, although the case where the negative carrier holder is provided so that the negative carrier can be slid in the vertical direction has been described, the negative carrier holder can be made rotatable and the negative carrier can also be slid in the horizontal direction. Also good.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide an image projection apparatus that can easily realize vertical feeding of a negative film having a plurality of frames.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention, and FIG. 1 is a sectional view schematically showing the structure of a projection device, FIG. 2 is a plan view showing the structure of a negative film, and FIG. FIG. 4 is a perspective view showing the configuration of the carrier, and is a perspective view for explaining a state in which a projection image from a projection device is projected onto a screen on a document table of a copying machine. A... Image projection device, 1... Light source, 2... Reflector, 3... Condenser lens, 4... Negative carrier receiver, 5... Negative carrier, 5a1-... Opening part , 5b
. ~... Convex portion, 5 C% ~... Concave portion, 6... Negative film, 6 a% ~... Sprocket hole, 7...
Lens, 8...fan, 9...diaphragm.

Claims (1)

[Scope of Claims] In an image projection device in which an image on a negative film to be projected is projected by irradiating the negative film with light from a light source, the negative film consisting of the plurality of frames is stored. An image projection device comprising: a flexible negative carrier; and a support mechanism that supports the negative carrier slidably in the vertical direction.