JPS5943554Y2 - film projection device - Google Patents

Description

[Detailed description of the invention] The present invention is a film projection device, particularly a film reader that selectively projects card-like film and roll-like film.
The present invention relates to projection devices such as film readers and printers.

There are two types of microfilm: card-like film that has many images in rows and columns, such as microfiche film, jacket film, and aperture card, and roll-like film that is wound on a reel. When these films are used in a microfilm reader, conventionally, a dedicated microfilm reader is provided for each type of film, or a dedicated film carrier is provided for each type of film.

This method requires multiple expensive microfilm readers or film carriers, which is very uneconomical, and the latter has the disadvantage that the film carrier must be replaced depending on the type of film, making the work very cumbersome. there were.

In order to eliminate this drawback, the present applicant has developed a device in which a film carrier that holds a card-like film is provided with a guide roller that guides the roll-form film, and a pair of reels that hold the roll-form film are provided on a leader body. However, a single roll of film is used because the film carrier moves while a pair of glues holding the roll of film are fixed to the film carrier and a separate leader body. When using a film carrier, the roll film is stretched from one reel to the other through the guide rollers of the film carrier, and when using a card film, the roll film must be completely wound onto one reel, making the operation difficult. This has the drawback that it is troublesome and it takes time to change the film type.

The present invention aims to eliminate the above-mentioned drawbacks, and provides a film projection device that can quickly select and project the image of either card-shaped film or roll-shaped film while the film is loaded in a predetermined position. This is what we provide.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

Figures 1 and 2 show a microfilm reader to which the present invention is applied, and 1 indicates the entire microfilm reader;
2 is an upper case of the microfilm reader, 3 is a lower case of the reader, 4 is an intermediate leg that connects the upper case and the lower case, and 5 is a diffusion type screen placed in front of the case 2.

Inside the upper case 2 are three reflective mirrors 6 as shown in the second figure.
, 7. 8 are provided facing each other, and the mirror 6
An imaging lens L is arranged below.

The imaging lens L is supported by an elastic leaf spring (not shown), and the leaf spring is fixed to the lower part of the case 2 .

In the lower case 3 of the reader 1, as shown in the second figure, a light source lamp 10 equipped with a concave mirror 9, a condenser lens 11, and a reflecting mirror 12 are arranged.

13 is a film carrier that holds microfilm and roll film.

3 to 5 show a film carrier, and the film carrier 13 is connected to a guide groove 32 (FIG. 3) provided on the rear upper surface of the lower case 3 of the reader 1 and the lower case 3.
A base body 1 movable in the X direction having engaging protrusions 131 and 132 that engage with a guide groove 33 provided on the front upper surface of
3A, and a movable frame (01' moving member) 13B that is placed on the base body 13A, moves integrally with the base body 13A in the X direction, and is movable in the Y direction independently of the base body.

A support member 14 with the index 1 fixed at the center thereof is fixed to the movable frame 13B, and a transparent glass plate G1 is fixed to a step provided on the inner side of the movable frame 13B.

Furthermore, as shown in the fourth figure, the movable frame 13B has a transparent glass G2 which overlaps the glass plate G1 and whose side portion is fixed on a rotating member (not shown) which is pivoted by a pivot.

Two glass plates G1. G2 moves integrally with the movable frame 13B and is scanned by the fixed imaging lens L, while holding the fish film F1 on a plane.

Sliders 15 and 16 are fixed to the first rotating member.
5.16 are side walls 17 provided on the left and right sides of the base body 13A;
．． 18.

The crimp glass plate G2 is rotated by the rotation of the rotating member to the position <G'2 as shown in FIG. can be loaded with fish film.

The side walls 17, 18 of the base body 13A are stepped by slopes 171, 181.

19 is an operating member formed on the movable frame 13B.

The movable frame 13B has guide grooves (not shown) that engage with stoppers 133 and 134 protruding from the front end portion of the base body 13A.

When the operating member 19 is moved in the direction of arrow Y in FIG. 3, the movable frame 13B is guided by the left and right side walls of the base 13A and moved forward
When the stopper 133, 134 is pulled out in the direction or the end of the groove engages with it, the forward movement is stopped.

At this time, the sliders 15, 16 on the pivoting member are respectively mounted on the side walls 17.
18 and is transferred to the slope portion 171, 1B+, the press-bonded glass plate G2 slides on the slope portion 17□ of the slider 15.16.
, 18, the rotating member integrated with the slider is rotated, and the glass plate G2 is rotated.

Therefore, when the operating member 19 is pulled out toward the user, that is, in the Y direction, the upper glass plate G2 is automatically separated from the lower glass plate G1, and the loading of the fish film F1 is extremely simple.

As shown in FIG. 3, on the side wall of the movable frame 13B are reel mounting arms 20, 21, and reel mounting shafts 2 for supporting the reels provided at the ends of the arms 20 and 21, respectively.
2, 23, reel 24 for winding and storing the roll film.
25, a handle 26.27 for rotating the reel attachment shaft 22.23 is provided.

Wind the roll film F2 on either reel,
The leading end of the roll film F2 guided from one reel is wound around the other reel.

Further, as shown in FIGS. 3 and 5, the glass plate G1. A lens holding frame 30 is fixed to the center of the support member 14 of the movable frame 13B at a position that does not overlap with G2, and is spaced downward from the holding frame 30 by a certain distance and parallel to the holding frame.
A transparent glass plate G3 is fixed to a stepped portion provided on the support member 14.

A feeding path through which the roll film F2 passes is formed between the lens holding frame 30 and the glass G3.

Furthermore, kite rollers 31 and 32 for guiding the roll film are rotatably provided on the support member 14 of the movable frame, and the roll film F2 is made flat approximately at the center between the guide rollers 31 and 32. You will be guided.

Therefore, roll film F2 is fish film F
1 and will be transported to a position that does not optically overlap with 1.

In addition, when using Fujifilm F1 or other card-like films, the card-like film is held flat by pressing it with the upper glass plate G2, but when using roll film F2, Since the film itself has to be moved, it is better not to provide a glass plate above the roll film feeding path to prevent damage to the film.

Of course, a glass plate may be provided above the passage.

Also, when using a fish film without installing a glass plate above the passageway, and when using a roll film, there is a glass plate G2 between the projection lens and the fish film when using a fish film. The optical distances between the two will be different.

Therefore, the positions of the projection lens and fish film are determined by taking into consideration the refractive index of the pressure-bonded glass G2, so that you do not have to adjust the focus every time you change the film type from roll film to fixed film or from fish film to roll film. For example, from the roll film surface located below the lens holding frame 30,
The optical distance to the top surface and the optical distance from the fish film surface to the top surface of the upper glass plate G2 are set to be different.

In the above configuration, the fish film F1 is attached to two glasses G1. holding it between G2 and operating the operating member 19;
The base body 13A and the movable frame 13B are integrally moved with respect to the imaging lens L in the direction of the arrow X along a plane perpendicular to the optical path of the lens.
Also, move only the movable frame 13B in the direction of the arrow Y to position the fish film in the optical path of the lens L, and move the index I on the movable frame 13B to the fish film F as shown in FIG.
1 to the corresponding address position on the scale S corresponding to the desired image.

Size of fish film F1 and both glass plates Gl, G
2 are approximately the same size, and by simply loading the fish film F1 into a predetermined position between both single glass plates Gl and G2, the address of each frame in the fish film F1 and the address on the scale S can be set. matches.

On the other hand, since the lens L is pressed against the glass plate G2 by the leaf spring, the fish film F on the lower side of the glass plate G2
1 is always kept at a constant distance.

As a result, a desired image frame of the fish film F1 is illuminated via the light source 10, condenser lens 11, mirror 12, and the lens L1, mirror 6, 7. The image is enlarged and projected onto the screen 5 via the image sensor 8.

Next, when observing the image on the roll film F2, operate the operating member 19 to move the movable frame 13B in the XY direction,
The movable frame 13B is pushed into the rear of the lower case 3, and the two glass plates Gl on the movable frame are moved.

G2 is moved to a position outside the optical path of the lens L, so that the flat part of the roll film, that is, the image of the roll film at a position facing the lens holding frame 30, is located in the optical path of the lens L, as shown in FIGS. 3 and 5. The movable frame 13B is moved to .

That is, the film carrier is moved so that the lens L is removed from the upper glass plate G2 and is opposed to the center of the holding frame 30.

Therefore, the fish film F1 is placed out of the optical path.

Roll film F wound around supply side glue 25
2 is guided by the guide roller 32 and the lens holding frame 30
and the glass plate G3, and then the other guide roller 3
1 and is wound up by Lee/L/24 on the winding side.

The roll film F2 is fed by turning the handle 26, and the feeding of the Toki film is stopped when a desired image frame in the roll film is located in the optical path.

Since the lens L is pressed against the holding frame 30 by a leaf spring, the image of the roll film F2 frame fed into the film feeding path formed in the holding frame 30 is enlarged onto the screen 5 by the imaging lens L in the same manner as described above. be projected.

Images on the screen can be viewed without focusing.

When using a roll film, in order to prevent the movable frame 13B from moving in the direction of the arrow X, when the movable frame 13B moves to the rear of the lower case 3 and the holding frame 30 is placed below the imaging lens L. As shown in FIG. 3, the side ends of the sliders 15 and 16 provided on the movable frame 13B are respectively engaged between the intermediate legs 40 of the pair of leaders 101, and by the engagement between the intermediate legs and the sliders, , the movable member 13B is prevented from moving in the direction of arrow X from the position X.

In the above embodiment, the oblique side portion was formed on the base frame in order to separate the pair of glass plates, which are transparent members, but the projecting portion was formed using another member provided separately from the base. Good too.

Further, although the lens holding frame is configured to have a rectangular shape, it is not limited to this and may be circular or the like.

As described above, according to the present invention, with the roll film stretched between the supply member and the winding member, a desired image in the card film or roll film is selected and positioned on the projection optical path. As a result, there is no need to remove the roll film when using the card film, and switching operations between two types of film can be performed extremely easily.

Further, after using the card-like film, the selected image on the roll-like film stretched between the supply member and the winding member can be immediately positioned in the projection optical path.

Further, when the selected image on the card-like film and the selected image on the roll-like film are related, the two related images can be alternately and quickly projected onto a screen etc. by simply moving the movable member in the X and Y directions. You can view both images while comparing and contrasting them.

[Brief explanation of the drawings] Figure 1 is a front view of the film leader according to the present invention, Figure 2 is a front view of the film leader according to the present invention;
Figure 3 is a partial cross-sectional configuration diagram of the first illustrated reader, Figure 3 is a top view of the first illustrated film carrier using roll film, Figure 4 is a cross-sectional view of Figure 3-4, and Figure 5. 6 is a perspective view of a main part of a film carrier, and FIG. 6 is a diagram showing a fish film in use. 13...Film carrier, 13A...
・Base body, 13B...Movable frame, 30...
Holding frame, 31, 32...Guide roller.

Claims (1)

[Scope of utility model registration request] a base body movable in the X direction along a plane perpendicular to the projection optical path; and a base body disposed on the base body, movable integrally with the base body in the X direction, and independently movable in the Y direction a movable member that holds a card-like film having a large number of images in the row and column directions; the movable member is provided with a holding member and a winding member for the roll-like film; and the roll-like film held by the holding member A film projection device characterized in that the movable member is provided with a guide member that guides the film to the winding member through a position that does not overlap the card-shaped film.