JPH0241616Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a box-shaped projector body, a light source system placed inside the projector body, a light diffuser plate that closes the top surface of the projector body, and a light source that penetrates the light diffuser plate. Improvement of an overhead type projector comprising a condenser lens projecting upward, an arm member extending from the projector main body, and a projection lens and a reflecting mirror provided on the arm member to receive the light beam from the condenser lens. It is related to.

Conventional projectors of this type, which are used as a single-function device for slide film, illuminate a file sheet placed above with light from a light source system that passes through a light diffuser plate. It has a characteristic that enables simultaneous predictive selection of a plurality of slide films aligned and held on a file sheet, and according to this, the image of the selected slide film is projected on the light diffusion sheet. By moving the file sheet held in a two-dimensionally movable frame to a desired position and positioning the slide film above the condenser lens,
done easily and quickly.

However, with this conventional device, after the projection of the image of each slide film held on one film seal is completed, the projection is temporarily interrupted and that file sheet on the frame body is replaced with another file sheet. Therefore, there was a problem in that there was a delay in viewing or observing the projected image, which resulted in a loss of interest.

This idea was based on an overhead type projector.
Without detracting from the above-mentioned advantages, it is possible to project each image of each slide film held on a plurality of file sheets without interruption.
This projector provides a projector that can be moved extremely smoothly and easily, and the projector is arranged sequentially from the bottom on the top surface of the box-shaped projector body, and is moved forward and backward in mutually orthogonal directions. A possible crosshead and a frame body, a sliding guide provided on the frame body to guide the sliding movement of a sliding plate that positions and supports an object to be imaged, and a sliding plate positioning means for restraining the sliding movement. and a sliding plate fitted into the frame, the sliding plate being constructed by mutually hinged at least two perforated members, each of the perforated The member is formed to have a size corresponding to a file sheet that aligns and holds a plurality of slide films, and a file sheet positioning means is provided on the surface of each perforated member, and a sliding plate is provided on the side surface of each perforated member. An engaging portion of the positioning means is provided, and the mutual opening angle of adjacent punching members is limited to 180 degrees.

In such a projector, by positioning and supporting a file sheet on each of a plurality of perforated members, after projection of each image of a plurality of films held on one file sheet is completed, the sliding movement of the plurality of perforated members Simply slide the plate against the frame and move the other file sheets onto the top of the projector body without interrupting the projection.
The image of the film held on the file sheet can be continuously projected, thereby sufficiently preventing the viewer's and viewer's ability to concentrate on the projected image from decreasing.

On the one hand, the file sheet which has finished projecting the film image can be removed from the perforated member during its inactivity, and thereby position and support further file sheets thereto, also without interrupting the projection. Therefore, when the sliding plate according to this invention is used, it is possible to reliably eliminate interruptions in projection from the start of projection to the end of projection of all film images.

This invention will be explained below based on illustrated examples.

FIG. 1 is a perspective view illustrating the basic structure of an overhead type projector.

In the figure, reference numeral 1 denotes a projector main body which is box-shaped and has an open top surface, and this projector main body 1 houses a light source system (not shown) inside. Reference numeral 2 indicates a light diffusing plate that closes the top surface of the projector body, and is made of, for example, a milky white plastic plate.

A condenser lens 3 associated with a light source system (not shown) is provided to pass through the light diffusing plate 2, and here, a pair of arm members extending from one side of the projector body 1 onto the light diffusing plate are provided. 4, and a projection lens 5 and a reflecting mirror 6 are sequentially disposed directly above the condenser lens of the arm member 4 so as to face upward.

Therefore, according to this configuration, the light beam leaving the light source system and passing through the condenser lens 3 is directed to the projection lens 5.
After passing through, it will be reflected almost horizontally,
It is also possible to first direct the light beam horizontally with a reflector and then to pass it through a projection lens with a horizontal optical axis.

In the illustrated example, a pair of first rails 7 are provided at the upper end of the projector body 1 along two opposing side walls, and a crosshead 8 is engaged with these first rails 7. a pair of second rails 9 extending in a direction perpendicular to 7;
are provided, and a frame body 10 having a mouth-shaped planar shape is directly engaged with these second rails 9.

Therefore, the crosshead 8 can freely move in the extending direction of the first rail 7, and the frame 10 can freely move in the extending direction of the second rail 9.

In addition, when the crosshead 8 and the frame 10 are moved intermittently, for example, by a distance corresponding to the size of each image such as a slide film, the space between the crosshead 8 and the projector body 1 and the frame 1
0 and the crosshead 8 is preferably provided with a positioning mechanism consisting of, for example, a notch spaced at a predetermined distance and a ball or roller biased by a spring toward the notch.

The frame body 10 is also provided with two guide members 11 serving as sliding guides, which form a pair and extend in parallel on two opposing sides thereof. This guide member 11
is a rod-shaped member having an inverted L-shape in cross section, and guides the movement of a sliding plate, which will be described later, fitted between guide members on the frame.

Further, a sliding plate is attached to the frame 10, and the guide member 1
1, a positioning means is provided for restraining the frame 10 at an appropriate position. As this positioning means, for example, as shown in FIG. placed on the body surface, one end of which is attached to the frame 10
or as shown in Figure 2b,
A ball 14 may be inserted from the back side into a tapered hole 13 provided in the frame 10 adjacent to the inside of the guide member 11, and the ball 14 may be biased by a spring 15.

Although the positioning means is attached to the frame 10 here, it is also possible to provide a similar mechanism to the guide member 11.

FIG. 3 shows a slide plate for a slide film that is applied to a projector and mounted on the frame 10.

This sliding plate 16 has two perforated members 17 each having a planar shape approximately connected to each other by a hinge 18, and the opening angle of each perforated member 17 is set to 180 degrees.
Each perforated member 17 has sufficient dimensions to place a file sheet in which slide films with mounts are arranged in four stages and five rows, for example. . Here, the reason why the perforated member 17 has a diagonal shape in plan is that although a normal file sheet is made of a plastic material with sufficient hardness, if only the four circumferences are supported, the central portion will bend. This takes into consideration the difficulty in focusing the slide film, but in the case of a projector in which the projection lens 5 can be moved by an automatic focusing device, it is also possible to make the planar shape into a mouth shape.

Further, here, two pins 19 as file sheet positioning means are protruded from the open surface of each perforation member 17, and the binding holes of the file sheet are engaged with these two pins 19. In addition, on each side facing the guide member 11, a second
A notch 20 is provided as an engaging portion into which the positioning means shown in the figure can fit.

It goes without saying that a sliding plate may be constructed by connecting three or more such perforated members 17 with a hinge, and the pin 19 as the fixing means may be replaced with a clip or the like.

When using such a sliding plate 16, first open each perforated member 17 to 180 degrees as shown in FIG.
As shown in the figure, the file sheets 22 on which the slide films 21 are aligned and held are engaged and positioned, and then the slide plates are attached to the frame 10.
The sliding plate 16 is inserted between the guide members 11 at the top, and the position of the sliding plate 16 with respect to the frame 10 is determined by the cooperation of the above-mentioned positioning means and the notch 20.

After the completion of such positioning of the sliding plate 16, each slide film 21 held on one file sheet located on the frame is predicted by the light transmitted from the light diffusing plate 2, Then, the necessary films 21 are sequentially projected while being selected.

and all located on one piercing member,
Alternatively, when projection of the desired film 21 is finished, the sliding plate 16 is moved on the frame body against the engagement force between the sliding plate positioning means and the notch 20 provided in the sliding plate 16. , the other perforating member 17 is positioned on the frame in the same manner as described above. According to this, the images of each film 21 located on the other perforation member can be selectively projected continuously without interrupting the projection.

By the way, during such projection of a film image, the file sheet 22 holding the film 21 after projection is moved to the main body 1 of the projector in the illustrated example.
Since it is supported by the perforation member 17 that protrudes to the left side of the perforation member, the projection of the film image located on the other perforation member is not hindered in any way.
It is replaced with a file sheet holding unprojected slide film.

Therefore, when projecting a slide film using this sliding plate 16, the sliding plate 16 is alternately slid against the guide member 11, and the file sheet is replaced at the same time, so that there is no interruption. Smooth projection can be performed.

Note that after the projection is finished, the sliding plate 16 is moved to the frame 10.
Remove the hinge 18 from the hinge 18 as shown in Figure 3b.
You can organize and store it extremely easily by folding it along the border.

FIG. 5 is a perspective view showing an example of a modification of the basic structure of the projector, in which a stage 23 having a crosshead-shaped planar shape is engaged with the second rail 9 provided on the crosshead 8. A frame 24 (see FIG. 5b) having a cross-shaped planar shape can be fitted therein.

Here, the stage 23 can freely move along the second rail 9 similarly to the frame 10 described with reference to FIG. Also, the frame body 24 shown in FIG. 5b
has a width substantially equal to that of the stage 23, and has a curved edge 24a that is bent downward from the edge in the width direction along the side surface of the stage 23 in the width direction. The frame 24 also has a guide member 25 similar to that described with respect to FIG. 1, and positioning means similar to that described with respect to FIG.

When using this projector, it is possible to perform the same functions as the projector shown in FIG. 1 by simply fitting the frame 24 onto the stage 23.

The frame 24 in this example has a stage 2
3, indirectly the second rail 9
It is particularly useful as an option for providing versatility in a projector that acts as a single-function machine for slide film.

Therefore, according to this invention, in particular, a sliding plate formed by a plurality of perforated members hinged is attached to a frame, and a file sheet positioned and supported by each perforated member is moved onto the frame as required. By moving the film image by moving it, the projection of the film image can be performed smoothly without interruption from the beginning to the end. It can be effectively prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the basic structure of the projector, FIG. 2 is a sectional view showing the positioning means for the sliding plate, FIG. 3 is a perspective view illustrating the sliding plate, and FIG. FIG. 5 is a perspective view showing how the sliding plate is applied to the projector, and FIG. 5 is a perspective view showing a modification of the basic structure of the projector. DESCRIPTION OF SYMBOLS 1... Projector main body, 2... Light diffusing plate, 3... Condenser lens, 4... Arm member, 5... Projection lens, 6...
Reflector, 7...First rail, 8...Crosshead, 9
...Second rail, 10,24...Frame, 11,25...
Guide member, 12...plate spring, 13...tapered hole, 14...
Ball, 15... Spring, 16... Sliding plate, 17... Perforation member, 18... Hinge, 19... Pin, 20... Notch,
21...Slide film, 22...File sheet, 23...Stage, 24a...Curved edge.

Claims (1)

[Scope of Claim for Utility Model Registration] A crosshead and a frame body which are disposed sequentially from below on the top surface of a box-shaped projector body and can be moved forward and backward in mutually orthogonal directions; , a sliding guide that guides the sliding movement of a sliding plate that positions and supports an object to be imaged, a sliding plate positioning means that restrains the sliding movement, and a sliding plate that is fitted into the frame. An overhead type projector comprising: the sliding plate having at least two perforated members hinged to each other; each of the perforated members holding a plurality of slide films in alignment; A file sheet positioning means is provided on the surface of each perforation member, and an engaging portion of a sliding plate positioning means is provided on the side surface of each perforation member, so that adjacent perforation members are An overhead type projector characterized by a limited opening angle of 180 degrees.