JPS60115918A - Film projecting device - Google Patents

Abstract

PURPOSE:To perform projection at a correct position regardless of a camera position during photography by providing a support means which support rotatably an upper structure on a lower structure around the optical axis of a light source and an optical system. CONSTITUTION:A lower cylindrical body 100 is provided to the end edge of a base 102 to which an image pickup device such as a video camera is fixed, and an upper cylindrical body 200 is mounted on the lower cylindrical body 100 freely rotatably in both directions shown by arrows FA and FB. A holder 400 through which a film carrier 300 is run slidably is provided fixedly to the lower part of the upper cylindrical body 200, and the holder 400 and carrier 300 run through it rotate as shown by the arrows FA and FB together with the upper cylindrical body 200 in one body. The light source, lens system, etc., are stored in the upper cylindrical body 200, and consequently a film FM carried by the carrier 300 is lighted. Light passed through the film FM is incident on the video camera fixed on a base 102 through the optical system including a reflecting mirror stored in the lower cylindrical body 200.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a film projection device for projecting images of developed film, and in particular, to a film projecting device for projecting an image of a developed film, and in particular, a film that is a plurality of consecutive frames or a film that is divided into each frame. The present invention relates to a film projection device that uses a film in which a plurality of frames are arranged in series, such as arranging them in series, and projects the film to create a video image using a video camera.

BACKGROUND ART A film projection device is used to project onto a video camera an image of a developed photographic film (hereinafter simply referred to as "film") on which images have already been taken and images have been recorded. The projected image is captured by a video camera and displayed on a predetermined display device, or stored as a video signal in a recording medium such as a videotape.

By the way, when projecting a developed film with a plurality of consecutive frames, which is commonly used, it is necessary to keep in mind that the recorded images are taken in a horizontal or vertical position when taken by a camera. That is, depending on the frame of the film, some frames are photographed in a horizontal position, while others are photographed in a vertical position in a direction in which the image is rotated 90 degrees from the horizontal position. Furthermore, some of these vertically positioned frames were taken by the photographer rotating the camera to the left, while others were taken by rotating the camera to the right.

On the other hand, a video camera is fixed relative to a film projection device, and images are always projected, recorded, and played back as frames in a horizontal position, so if a frame is taken in a vertical position with a silver-halide photo camera, the film must be rotated. It becomes necessary to do so.

However, in conventional film projectors (in conventional film projectors), the film is configured to rotate only 90 degrees, so although one frame in one vertical position can be projected in the correct position, the frame in the other vertical position cannot be projected. This requires time-consuming operations such as attaching and detaching the film carrier from the carrier and reversing its orientation.

Purpose The present invention has been made in order to improve the drawbacks of the prior art, and to provide a good projection in the correct position no matter what camera position the photograph is taken. The object of the present invention is to provide a fin projection device that can

DISCLOSURE OF THE INVENTION According to the present invention, the invention includes a lower structure in which a light source for projecting a film image is housed, and a lower structure in which a projection optical system is housed, and the film is disposed between the upper structure and the lower structure. A film projection device that projects images by being inserted through a film carrier has a holding means through which the film carrier is movably inserted in a plane perpendicular to the optical axis of an optical system, and the holding means is attached to an upper structure. The projection device further includes:
It includes support means for rotatably supporting the upper structure relative to the lower structure around the optical axis of the light source and the optical system.

DESCRIPTION OF EMBODIMENTS Next, embodiments of a film projection apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

First, an overview of the embodiment will be explained with reference to FIG. In this figure, the lower cylinder 100 is a base 10 to which an imaging device such as a video camera (not shown) is fixed.
An upper cylinder body 200 is mounted on the lower cylinder body 100 so as to be rotatable in both directions as shown by arrows FA and FB in the figure.

A holder 400 into which a film carrier is movably inserted is fixedly provided at the lower part of the upper cylinder 200. That is, this holder 400 and the carrier 300 inserted therein rotate integrally with the upper cylindrical body 200 as shown by arrows FA and FB.

A light source, a lens system, etc. are housed inside the upper cylinder 200, and the film FM conveyed by the carrier 300 is illuminated by this.

The light that has passed through the film FM is incident on a video camera fixed on the base 102 through an optical system including a reflecting mirror housed in the lower cylinder 200.

Next, this embodiment will be described in more detail. □ FIG. 2 shows a cross section taken along line n--H in FIG. 1.

Further, FIG. 3 shows the lower cylinder 100, and FIG. 4 shows the upper cylinder 200. In these FIGS. 2 to 4, the upper i; B of the lower cylinder 100
The circumferential edge of ``Open 1'' 104 is curved in an abbreviated form and has a diameter of 9.7.
A run-off portion 106 is formed. This noranso part 10
6 has a protrusion 108 having the configuration shown in FIG.
are provided at positions separated by an angle of 90° from each other.

An inner wall 114 is disposed with a gap 112 inside the outer wall 110 on which the flange portion 106 is formed, and the lower end of the inner wall 114 is joined to the outer wall 110.

Inside the inner wall 114, electrical connection brushes (
(hereinafter simply referred to as "brushes") 116° 118 are fixedly installed, and connecting wires 120, 1 are connected to these brushes 116, 118.
22 is connected so that power can be supplied from the outside.

A reflecting mirror 124 is arranged at the bottom of the lower cylinder 100,
An optical lens 126 is fixed to the lower part of the outer wall 110 on the base 102 side, so that light reflected by the reflecting mirror 124 passes through the optical lens 126 and enters a video camera (not shown). The optical axis AX of this light is
Indicated by a dashed line.

Next, the upper cylindrical body 200 has a holder 400 at its lower part, and a cylindrical body 202 and a cylindrical body 204 disposed inside the cylindrical body 202 are formed below the holder 400. The cylindrical body 202 can be slidably fitted into the gap 112K of the lower cylindrical body 100 described above. On the other hand, the cylindrical body 204 has bluffs 116 and 11 on its outer periphery.
Annular electrodes 206 and 208 are fixed so as to contact the upper cylinder 200 from inside the cylinder 204.
connection strip 2 connected to the light source LA fixed on the top of the
Electrodes 206 and 208 are bonded to 10 and 212, respectively.

That is, brushes 116, 118, electrodes 206°208
The power supplied from the outside by the connection bands 210 and 212 is connected to the light sources r, AK.

Appropriate condensing lenses 214 and 216 and a light diffusing plate 217 are arranged and fixed below the light source LA of the upper cylinder 200.

Next, the holder 400 has a generally rectangular cross-sectional shape with a thin thickness as a whole, and the central portion is such that the light of the optical axis AX from the light source LA can pass therethrough, as shown in FIG. , openings 415 are provided on the upper and lower surfaces of the light passing portion, respectively.
and 417. Further, a pressing spring 40 is mounted on the upper part of the inner wall of the end portion of the holder 400 that protrudes left and right in FIG.
2.404 are arranged respectively, and a suppression spring 402,
Protrusions 406 and 408 shown in FIG. 5 are provided opposite to 404. Advantageously, the protrusions 406, 408 have smooth curved surfaces so as not to damage the outer surface of the bottom 302 of the carrier 300. Carrier 300 (1st
(see figure) is inserted into the holder 400 from any of the openings 41O2412 of the holder 400 as indicated by the arrow FC.

On the other hand, an annular groove 416 is formed on the surface of the holder 400 facing the flange portion 106, and the protrusion 108 fits into the groove 416 in the state shown in FIG.

Next, the protrusions 108, 406, 408 will be explained.

As shown in FIG. 5, a hollow bolt 5 is provided on the board 500.
02 is embedded. Inside this bolt 502,
A spring 504 is housed in a compressed state, and a sphere 506 is disposed above the spring 504. The inner diameter of the upper part of the bolt 502 is also smaller than the diameter of the sphere 506.

Therefore, although the sphere 506 is pushed upward by the spring 504, only a portion thereof is exposed from the bolt 502, and does not separate from the bolt 502. In addition, sphere 5
06 is secured to a bolt 502 and a spring 504, but is allowed to rotate.

Next, the carrier 300 will be explained based on FIGS. 6 to 9. FIG. 6 shows the carrier 300 in an open state and the state of its outer surface. In this figure, as shown by the arrow FC in FIG. 2, a bottom part 302 and a lid part 304, which are the lower side and the upper part when inserted into the holder 400, have rectangular cut-out parts corresponding to the frames of the film to be held. A plurality of 306 are formed. bottom part 302
On the outer surface of the cutout portion 306, grooves 308 are formed parallel to the longitudinal direction on the left and right sides of the cutout portion 306, respectively. The groove 308 allows the protrusion 406,
The end portion 309 of the carrier 408 is expanded into a fan shape and bent in two to facilitate attachment of the carrier 300 to the holder 400. Groove 30
8, the expansion portion 31 is periodically inserted in correspondence with the resection portion 306VC.
0 is formed.

Kiya! J73UO, 35 cylinder, prony depending on the type of film and hisograph used.

], IO type full size and half size are available. The widths of the bottom portion 302 and the lid portion 304 of the carrier 300 are designed to be sufficiently narrower than the width of the opening 410°4i2 of the holder 400. Thereby, as will be described later, the carrier 300 can be inserted into the holder 400 and moved freely in the width direction while remaining in the holder 7 to perform enlarged projection.

Next, the groove 3o8, the expanded portion 310, and the protrusion 406.
The effect of fitting in with 408 will be explained. FIGS. 7 and 8 show the state in which the spheres 506 of the projections 406 and 408 are fitted into the groove 308 and the expanded portion 310, respectively, and a cross section taken along the line ■-■ in FIG. ■A cross section along each line is shown. As shown in FIGS. 7 and 8, since there is a pressing force from the spring 504 (see FIG. 5), the sphere 506 in the case of OK fitting is better than the expansion part 3 than in the ri'1308. It will move upward. Therefore 1 protrusion 406, 408 and extension 310
By appropriately setting the relative positional relationship between the two, it is possible to configure the device so that a click is applied when the center of one of the cut portions 306 coincides with the optical axis AX. That is, groove 3
08 and the protrusions 406 and 408 make the carrier 300
A guide means for feeding the expansion part 3 is formed.
10 and the protrusions 406 and 408 form a frame-by-frame feed knob.

The two protrusions 406 and 408 are disposed at a position where a straight line passing through them intersects the optical axis AX, that is, at a position where the side protrusions 406 and 408 face each other with the optical axis AX as the center. The distance between the book grooves 308 is
If it is common to many types of carriers 300, and the extended portion 310 is arranged so as to coincide with the center position of each cutout portion 306 in the longitudinal direction of the carrier 500,
Carrier 300 for films of various sizes as described above
This is advantageous because it can be stopped at a regular frame position.

In the case of enlarged projection, if it is sufficient to enlarge 1/4 of the total area of one frame, for example, in the case of a 35-frame full-size film, the carrier 300 should be approximately 6 am from the normal position in the width direction. It is sufficient if it can be moved. Therefore, the groove 308 may be located at least 6m+n from the edge 315 of the carrier bottom 302 and the side 317 of the cutout 306 in the longitudinal direction of the carrier.

7 and 8, the groove 308 and the extension 310 have the same depth and are deep enough that the sphere 506 does not touch their bottoms, but in FIG. As shown,
The width of the groove 308 is expanded in advance on the side of the expanded portion 310, and a shallow portion 902 and a deep portion 904 are formed in the groove 900.
The width and depth of the grooves 41G formed in the holder 400 may be such that the sphere 506 always contacts the bottom. That is, the extended portion is arranged at an angle of lIO3, and the extended portion and the protrusion 108 form a vertical or horizontal click for each rotation angle of 900 of the upper cylinder 200. In particular, since the sphere 506 of the projection 108 supports the upper cylinder 200, it also has the function of smoothing the rotation of the upper cylinder 200. In other words, the groove 416 and the projection 108 support the upper cylinder 200. The extension and the projection 108 form a rotational click, and the sphere 506 of the projection 108 forms a bearing means.

Next, the overall operation of the above embodiment will be explained.

First, when the upper cylinder 200 is attached to the lower cylinder 100 from the direction of arrow FD in FIG. 3, the brushes l16 and 118 come into contact with the electrodes 206 and 208. For this reason,
Power can be supplied to the light source LA from the outside, and the light source LA is turned on by operating a switch means (not shown). As mentioned above, the electrodes 206, 208 are connected to the cylinder 20.
4 is annularly formed on the outer surface of the upper cylindrical body 20.
No matter what angle 0 rotates to the left or right, the light source L
The supply of power to A continues without any problem.

Next, the carrier 300 holding the film FM is inserted into the holder 400 (see FIG. 1). This carrier 3
00 is pressed downward in FIG. 2 by the springs 402 and 404, and the ball 506 fits into the groove 308.

The operator slides the carrier 300 by clicking the extension part aio and the protrusion 406, and selects a frame that requires projection.

The image of the selected frame is illuminated by the light beam LA and projected onto a video camera (not shown) via an opposite mirror 124 or the like. In this case, the operator rotates the upper cylinder 200 in accordance with the vertical and horizontal positions at the time of photographing (referring to the image displayed on the display device). The angle of rotation suitable for projection in the vertical position is ±90° with respect to the horizontal position, but the normal position for these horizontal and vertical positions is the groove 416.
can be known by clicking the protrusion 108.

Further, the 2000 rotations of the upper cylinder body are performed satisfactorily by the guide provided by the groove 416 and the bearing action of the protrusion 108.

In this case, power is supplied to the light source LA without requiring a cord to be connected to the upper cylinder 200 from the outside, so in this rotation, if such a cord is provided, it will be connected to the carrier 300. There will be no inconveniences such as getting hit by the cord or twisting the cord. Further, the direction of rotation is completely arbitrary, and it is also possible to continuously rotate only in one direction.

However, in the present invention, power is not necessarily supplied to the light source LA by the upper cylindrical body 2, rather than by the brush described above.
It is also possible to connect a cord to 00. In this case, the upper cylinder 200 cannot rotate completely freely, but it can be rotated by ±9 when shooting from a horizontal position normally taken with a camera.
For projection of an image shot vertically in the positional relationship 00, the film holder can be rotated by a sufficient angle.

Furthermore, when projecting a part of the corresponding frame in an enlarged manner by zooming up, the center of the enlarged part can be aligned with the optical axis AX by sliding the carrier 300 inside the holder 400 while inserting it into the holder 400. Bye.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and other shapes, structures, etc. can be advantageously applied as long as they have the same effect.

In addition, ventilation holes may be formed in each part to cool the light source LA or prevent the film FM from heating.

In addition, in order to prevent accidents such as electric shock due to contact with the brushes 116 and 118 before the upper cylinder 200 is attached to the lower cylinder 100, a micro switch, a proximity switch, etc. are provided, and these switch means are Upper cylinder body 2
It turns ON only when 00 is installed, and the brushes l16, 118
The power may be applied to the In addition, according to the device that caused the accident by changing the shape, etc., the holder can be rotated so that films shot in vertical and horizontal positions can be projected in the correct position, so the camera position at the time of shooting is The effect is that projection at the correct position can be performed satisfactorily regardless of the situation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the state of use of an embodiment of the film projection device according to the present invention, FIG. 2 is a cross-sectional view of the device shown in FIG. 1 taken along the line II-II, and FIG. FIG. 4 is a perspective view showing the upper cylinder of the device shown in FIG. 1, FIG. (Fig. 7 is a cross-sectional view taken along the line ■-■ in Fig. 6 in the fitted state with the protrusion) Fig. 8 is the partially broken plan view showing one configuration example. A cross-sectional view taken along the line ■--■ in FIG. 6, and FIG. 9 is a cross-sectional view showing another embodiment of the groove. 100...Lower cylinder, 108...Protrusion, 116°118...Brush, 124...Reflector, 200...
・Dobe cylinder, 206, 208...electrode, 300...
Carrier, 400...Holder, 416...Groove, AX
...Optical axis, FM...Film, LA...Light source. Figure 5 Figure 6

Claims (1)

[Claims] (1) includes an upper structure in which a light source for projecting images on the film is housed, and a lower structure in which a projection optical system is housed; A film projection device that is inserted through a film carrier to project images, the projection device having a holding means through which the film carrier is movably inserted in a plane perpendicular to the optical axis of the optical system; The holding means is integrally coupled with the upper structure, and the projection device further includes support means for rotatably supporting the upper structure with respect to the lower structure around the optical axis of the light source and optical system. A film projection device featuring: 2. Film casting percentage wall l/ as claimed in claim 1
711.8) A film projection apparatus, wherein the support means includes a click means for indicating a normal rotational position of the lower structure relative to the upper structure. 3. In the film projection apparatus according to claim 1 or 2, the support means is located between the upper and lower structures and prevents rotation of the upper structure by transmitting electric power externally supplied to the lower structure. A film projection apparatus characterized in that it includes connection means for supplying said light source without any interference.