JPH01138547A - Portable microfilm viewer - Google Patents

Abstract

PURPOSE:To miniaturize the title viewer by providing a magnetic head reading magnetic information on a magnetic tape, a blip sensor detecting a brip mark on microfilm and a lighting magnifier and magnifying a film image on the microfilm transmittingly lighted by a lighting body. CONSTITUTION:A cassette 9 is loaded onto a cassette loading part 10, and a slide frame 4 is pulled out. The main frame 3 is downwardly rocked and closed, and a magnetic head 3 built-in the viewer main body 1 reads out the magnetic information on the magnetic tape through the operation of a operational panel 51. While the blip sensor 54 detects the blip marks on the microfilm 8, it controls said film 8 to wind or rewind it, and visually recognizes the image on the microfilm 8, which is transmitted and lighted by the lighting body 55, as a magnified image through the magnifier 57. Thus, the viewer main body can be reduced in size, thickness and weigh to the extent that its size is one- rank larger than that of a cassette; therefore its carrying convenience is improved.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a portable microfilm viewer.

(Prior art and its problems) Conventionally, a cassette containing projection microfilm is loaded, and the magnetic information on the microfilm magnetic tape is read using the magnetic head built into the device by operating the operation panel. While the blip sensor detects the blip marks on the microfilm, the motor winds and unwinds the microfilm, and the image of the film that is transmitted and illuminated by the illuminator is magnified onto the screen via the projection lens and reflective mirror. A projection device (micro league) has been proposed.

By the way, the conventional projection device mentioned above has a large screen (
For example, A4 size, etc.), even a compact folding type is two to three times the size of a cassette, so portability is not always good. .

(Object of the Invention) The present invention has been made to solve the above-mentioned conventional problems, and when not in use, it can be downsized to one size larger than a cassette, has excellent portability, and can be used anytime and anywhere. The purpose of this invention is to provide a portable microfilm viewer that can be used very easily.

(Structure of the Invention) Therefore, the present invention includes a set plate that forms a bottom wall and both side walls, a main frame that is hinged to the rear of the set plate so as to be able to swing up and down, and forms an upper wall and a rear wall.
A rectangular box-shaped viewer body is constituted by a slide frame that is supported by the front part of the main frame so as to be slidable back and forth and forms a front wall, and a projection microfilm is wound and stored inside the set plate. A cassette loading section is provided for loading a cassette stored in a rewindable manner so that the film image is in an upright position when viewed from the front.A battery, a motor, and a speed reduction mechanism are built into the rear part of the main frame. The upper part of the main frame is fitted with a take-up spool and a rewind spool of the cassette, respectively.
A winding shaft and a rewinding shaft are built in and driven by the motor via the speed reduction mechanism, and an IE panel is provided on the upper surface of the main frame, and a drawer of the slide frame is provided on the upper surface of the slide frame. During operation, a magnetic head that reads magnetic information on the magnetic tape of the projection microfilm, a blip sensor that detects blip marks on the projection microfilm, and an illumination body that transmits and illuminates the projection microfilm are provided. The slide frame is characterized in that a front part thereof is provided with a magnifying glass for magnifying the film image of the projection microfilm that is transmitted and illuminated by the illumination body when the slide frame is pulled out. be.

(Operations and Effects of the Invention) The present invention swings the main frame upward relative to the set plate to open it, loads a cassette into the cassette loading section of the set plate, pulls out the slide frame, and swings the main frame upward. By operating the operation panel, the magnetic head built into the viewer reads the magnetic information on the magnetic tape, and the motor winds the microfilm while the blip sensor detects the blip marks on the microfilm. By performing return control, the image of the microfilm that has been transmitted and illuminated by the illumination body can be viewed as an enlarged image through a magnifying glass.

Therefore, the square box-shaped viewer body has been made smaller and thinner, to the extent that it is one size larger than the cassette when not in use.
It can be lightweight and has very good portability.

It also has a built-in operation panel, magnetic head, blip sensor, etc., so it can read the magnetic information on the magnetic tape and the blip marks on the microfilm, and use the search function in the same way as conventional large projection devices. Can be done.

Furthermore, since it has a built-in battery, it can be used even in places without AC power, making it very easy to use anytime and anywhere.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the portable microfilm viewer includes a set plate 2 forming a bottom wall 2a, side walls 2b, 2b of a viewer body 1 in the shape of an oblong rectangular box, and an upper wall 3.
a, a main frame 3 forming a rear wall 3b, and a front wall 4a.
It basically consists of a slide frame 4 that forms a.

The bottom wall 2a of the set plate 2 is formed into a horizontally long rectangular plate shape, and from both longitudinal ends of the bottom wall 2a to both side walls 2b.
, 2b are formed to stand upward in parallel.

The upper wall 3a of the main frame 3 is formed in a horizontally elongated sheath-shaped hollow case, and the rear wall 3b is formed in a rectangular block-shaped hollow case, and both sides 3c, 3 of the rear wall 3b are formed.
c and the rear side walls 2b and 2b of the set plate 2 are pivotally connected by a hinge pin 5.5, and the set plate 2 and the main frame 3 are hinged so as to be able to swing vertically relative to each other ( (See Figure 3).

The front wall 4a of the slide frame 4 is formed in the shape of a horizontally long thick plate, and a sliding wall 4b in the shape of a horizontally long hollow case extending rearward is formed on the upper part of the front wall 4a.
is fitted into the upper wall 3a of the main frame 3 so as to be slidable back and forth.

When the slide frame 4 is in the push-in operation position when not in use (see FIG. 1), the sliding wall 4b is housed within the earthen wall 3a of the main frame 3, and the viewer main body l is inserted into the cassette 9.
The slide wall 4b is pulled out from the upper wall 3a of the main frame 3 in the drawer operating position (see Fig. 2) during use.
It can be used as a viewer as described below.

The bottom wall 2a and both side walls 2b of the set plate 2.

2b, as shown in FIGS. 4 and 5, there is a cassette loading section I into which a cassette 9 containing a roll-shaped projection microfilm 8 that can be wound up and rewound is loaded.
O is provided.

The film image a of the microfilm 8 in the cassette 9 is usually placed on the fourth
As shown in the figure, the cassette 9 is photographed in an inverted position when viewed from the front, but with the portable microfilm viewer according to the present invention, it can only be enlarged using a magnifying glass, which will be described later.
The cassette 9 is loaded into the cassette loading portion IO of the set plate 2 so that the film image a is in the upright position when viewed from the front (see FIGS. 3 and 5). That is, contrary to the case where the cassette 9 is loaded into a conventional projection apparatus, the cassette 9 is loaded upside down.

A cover 9a that can be opened and closed is provided on the running surface of the microfilm 8 of the cassette 9, and winding/unwinding spools 9b, 9b are provided on the top surface when the cassette 9 is loaded upside down.
is coming.

Inside the rear wall 3b of the main frame 3, as shown in Figs. ) etc. are built in, and within the earthen wall 3a of the main frame 3 are winding/unwinding spools 9b, 9b for the cassette 9.
a winding/unwinding shaft 14a which is fitted from above to the winding/unwinding shaft 14a,
14b is built-in.

Chain winding/unwinding shafts 14a, 14b and the speed reduction mechanism 13
are connected via timing belts 15a, 15a, respectively.

Specifically, this film drive mechanism drives two winding/rewinding shafts 14'a, 14'b, which are respectively fitted to the winding/rewinding spools 9b, 9b of the cassette 9, and drives the microfilm. It is used for sending and returning.

That is, as shown in FIGS. 6 and 8, a drive motor 12 is installed horizontally in the rear wall 3b of the main frame 3, and a small-diameter gear 17 is attached to its output shaft.
This gear 17 is connected to the drive motor 12 by a bearing member 18.
It meshes with a relatively large-diameter gear 20 attached to one end of a rotary transmission shaft 19 that is supported parallel to the axial direction of the rotary transmission shaft 19 . A helical gear 21 is fixedly attached to the other end of the rotation transmission shaft 19, and the helical gear 21 is attached to the lower end of a vertical rotation transmission shaft 23 that is rotatably supported on a support substrate 22 around a vertical axis. It meshes with the attached helical gear 24, and due to the meshing of both gears 21 and 24, the rotation direction is 90°.
The rotation is then transmitted to the rotation transmission shaft 23 in the vertical direction.

As shown in FIGS. 9 and 10, on the upper surface side of the support substrate 22, there is a seesaw plate 2 that swings around a vertical rotation transmission shaft 23 that is supported by a bearing 25 on the support substrate 22.
6 is provided, and this seesaw plate 26 is provided with a rotation transmission shaft 2
Switching gears 28 and 29, which are always in mesh with the central gear 27 attached to the upper end of the shaft 30 and 31, are rotatably attached to the shafts 30 and 31, respectively, from both sides.
It is pivoted by.

Large diameter gears 32 and 33 that mesh with the switching gear 28 or 29 on the tilted side when the seesaw plate 26 tilts to one side are respectively pivotally supported on the support substrate 23. Each gear 3
The rotating shafts 34, 35 of 2, 33 are rotatably supported by bearings 36, 37, respectively, and a belt pulley 38, 39 is attached to the lower side of each gear 32, 33.

These belt pulleys 38, 39 are connected to each winding/unwinding shaft 14, as shown in FIG.
Large diameter belt pulleys 4 attached to the upper ends of a and 14b, respectively.
The timing belt 15a wrapped between the 0.41 and 0.41
, 15b, the winding/unwinding shafts 14a, 14b can be driven via the respective belt pulleys 38, 39.

As shown in FIGS. 8 and 10, the rotating shafts 34, 35 of the large-diameter gears 32, 33, which can mesh with the switching gears 28, 29, are extended upward, respectively, and the rotating shafts 34, 35 are connected to the rotating barrels 42, 4.
3 is fixedly attached to these two rotating cylinders 42, 43, and the clamping part 44a.

44b, each holding part 44a,
44b, it is preferable to provide a friction spring 45 that clamps the rotary cylinders 42, 43 with spring force to form a so-called friction brake 46.

Since the friction brake 46 can apply a predetermined back tension to the winding/rewinding shaft on the side that is not driven when the film is fed or returned, it is possible to effectively prevent the occurrence of loosening of the winding.

In the film drive mechanism described above, when the drive motor 12 placed horizontally is rotated forward or reverse, the central gear 27 of the seesaw plate 26 is rotated forward or reverse.

The forward or reverse rotation of the central gear 27 is controlled by the seesaw plate 2.
6 is swung obliquely according to its rotational direction, and the switching gear 28 (29) located in the inclined direction meshes with the corresponding large-diameter gear 32 (33). The meshing state shown in Fig. 10 is as follows:
The winding/unwinding shaft 14a on the right side of the figure is driven by a timing belt 15a, and the microfilm 8 is driven in the feeding direction.

Further, when the drive motor 12 is reversed from the state shown in FIG. 1O, the seesaw plate 26 swings in the opposite direction, and as a result, the winding/rewinding shaft 14b on the left side in the figure is driven. Rewind the microfilm 8.

In addition, in FIG. 1O, 47 is a stopper plate that stops the rocking of the seesaw plate 26.

In the film drive mechanism described above, by placing the drive motor 12 horizontally, using a seesaw type gear clutch mechanism, etc., the installation space for the film drive mechanism can be made compact and thin.

Returning to FIGS. 1 and 2, an operation panel 51 is provided on the upper surface of the upper wall 3a of the main frame 3, and the operation panel 5I includes data input keys 51a for inputting search data. , funky scissor keys 5 lb such as forward, backward, and search mode selection keys, and a display section 51 that displays the address and search data for each frame of the microfilm.
c is provided.

The input data of the operation panel 51 and the like are processed by a microcomputer (not shown) built into the main frame 3.

On the other hand, inside the sliding wall 4b of the slide frame 4, as shown in FIG. Blip sensor 5
4, and a plurality of LEs that transmit and illuminate the microfilm 8.
D (light emitting element) 55 and a diffuser plate 56 are provided.

Further, a magnifying glass 57 is provided on the front wall 4a of the slide frame 4 so as to face the image area of the microfilm 8, passing through it in the front-rear direction, and the magnifying glass 57 is moved in the optical axis direction to adjust the focus. be able to.

As shown in FIG. 6, a motor 58 for rotating the magnetic head 53 is provided in the sliding wall 4 of the slide frame 4.
and a lock that is rotated in conjunction with the motor 58 and is engaged with the lock*2c (see FIG. 14(a)) of the set plate 2 to lock the set plate 2 and the main frame 3 from opening. A claw 59 is provided.

Specifically, as shown in FIG. 12, a worm wheel 61 meshing with a worm 60 of the motor 58 and a rotating shaft 62 of the magnetic head 53 are connected by a reduction gear train 63, and the rotating shaft 62 and the rotating shaft 64 of the lock pawl 59 are connected by an interlocking gear train 65.

Then, the magnetic head 53 is moved by the motor 58 via the reduction gear train 63 to the horizontal zero displacement position (see FIG. 13(a)) where it does not contact the microfilm 8 when the cassette is not loaded.
, when loading a cassette and reading the magnetic information on the magnetic tape, the vertical 90-degree displacement position that contacts the magnetic tape (see Figure 13 (b)), when loading a cassette and using Roubaix 57, the microfilm 8 Reverse loading direction 1 that does not contact
It is controlled to rotate to the 80 degree displacement position (see Figure 13 (C)) and to the horizontal 0 displacement position when taking out the cassette.

Further, the lock pawl 59 is moved by an interlocking gear train 65 to an unlock position (see FIG. 14(a)) when the magnetic head 53 is at a 0-degree horizontal displacement position, a 90-degree vertical displacement position, and a 1-position reverse stacking position.
It is controlled to be rotated to a displacement lock position of about 80 degrees (see FIG. 14(b) and FIG. 14(C)).

A photoelectric position detection sensor 6 is connected to the lock claw 59.
6 is provided, and when returning to the reverse stacking direction 180 degree displacement position unlock position, the position is detected by the sensor 66 and controlled so as to return accurately.

Therefore, the drive control of the magnetic head 53 and the lock pawl 59 can be performed by one motor 53, which contributes to making the device more compact.

In addition, when using the Roubaix 57, the lock claw 59 is
Since the rotation is controlled to the lock position even when the position is shifted 90 degrees in the reverse stacking direction, there is no fear that the lock claw 59 will be unlocked even if the voltage of the battery 11 drops, and the microfilm 8 of the cassette 9 will not be locked in the image area. It can be prevented from being taken out at this position.

With the above configuration, first, the main frame 3 is swung upwardly with respect to the set plate 2 to open it wide (see Fig. 3), and then the set plate 2 is opened.
Load the flipped cassette 9 into the cassette loading section 1o,
Pull the slide frame 4 forward.

Next, the main frame 3 is swung upward and the cassette 9 is sandwiched between it and the set plate 2 to close it (
(See Figure 2).

At this time, the cover 9a of the cassette 9 is held against the lower edge of the front wall 4a of the slide frame 4 while being opened downward.

And operation panel 5! When the function key 51b is operated, the motor 58 in the slide frame 3 rotates and the magnetic head 53 is moved vertically by 90 degrees to the position shown in FIG.
At the same time, the lock claw 59 rotates to the lock position (see FIG. 14(b)) to lock the set plate 2 and main frame 3 so that they will not open.

Next, the motor 12 in the main frame 3 rotates to feed the microfilm 8 of the cassette 9 with the league leading, and when the magnetic information on the magnetic tape is read by the magnetic head 53, the motor 58 rotates again to feed the microfilm 8 from the cassette 9 to the magnetic head. At the same time, the locking claw 53 rotates to a position R of 180gL' in the reverse stacking direction (see Fig. 13(c)), and at the same time, the locking claw 59 rotates to a position R of 180gL' (see Fig. 14(c)), and the set plate 2 and main frame 3 Continuously locks so that it does not open.

When the user looks into the Loubaix 57, the image of the microfilm 8 illuminated by the LED 55 becomes visible as an enlarged image.

After that, operate the function key 51b etc. to move the blip mark on the microfilm 8 to the blip sensor 5.
4, move the microfilm 8 to the motor 12.
When the images are sent by , the images on the microfilm 8 can be viewed continuously.

When the image on the microfilm 8 has been visually checked, the rewind/eject key on the operation panel 51 is pressed, and the motor 12 is reversed to rewind the microfilm 8. When rewinding is completed, the motor 58 rotates. The magnetic head 53 is horizontally 0
At the same time as the lock claw 59 rotates to the changed position (see FIG. 13(a)), the lock claw 59 rotates to the unlock position (see FIG. 14(a)) and unlocks the set plate 2 and main frame 3 so that they can be opened. do.

Then, the main frame 3 is swung upwardly around the hinge pin 5 with respect to the set plate 2 to open it wide (third
(see figure), take out the cassette 9, push the slide frame 4 backward, and swing the main frame 3 upward to close it (see figure 1).

In this way, the viewer main body 1 can be downsized to one size larger than the cassette 9 when not in use, making it very portable.

In addition, the operation panel 51. Built-in magnetic head 53, blip sensor 54, etc., read magnetic information on magnetic tape and blip marks on microfilm.
Similar to conventional large-scale projectors, the search function can be used, and since it has a built-in battery 11, it can be used even in places where there is no Ac1t source. Therefore, it can be used easily at any time and place.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the portable microfilm viewer according to the present invention when not in use, Fig. 2 is a perspective view when in use, Fig. 3 is a perspective view of the cassette loading/unloading, and Fig. 4 is a perspective view of the cassette. 5 is a perspective view of the cassette turned over, FIG. 6 is a transparent plan view of the viewer of FIG. 1, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a bottom view of the film drive mechanism. FIG. 9 is a sectional view of the main part of FIG. 8, FIG. 1O is a plan view of the film drive mechanism,
1st! 12 is a perspective view of the locking mechanism, FIGS. 13(a) to 13(c) are plan views showing the rotational position of the magnetic head, and FIG. 14( a)
~FIG. 14(c) is a plan view showing the rotational positions of the lock claws. l... Viewer body, 2... Set plate, 2a.
...bottom wall, 2b...both side walls, 2c...locking groove, 3.
...Main frame, 3a...Top wall, 3b...Rear wall, 4...Slide frame, 4a...Moe wall, 4b...
・・Sliding wall, 5・・Transformation pin, ・・Projection microfilm, 9・・Cassette, 10・・Cassette loading part, 11・・Battery, 12・・Horizontal motor, 13
...Deceleration mechanism, 51...Operation panel, 53...Magnetic head, 54...Blip sensor, 55...LED (illumination body), 57...Magnifying glass, 58
...Motor, 59...Lock claw. Patent applicant Fuji Photo Film Co., Ltd. Agent
Patent attorneys Aohaku, Ao, and 2 others Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] (1) A set plate that forms a bottom wall and both side walls, a main frame that is hinged to the rear of the set plate so as to be able to swing up and down to form a top wall and a rear wall, and a main frame that is attached to the front of the main frame. A rectangular box-shaped viewer body is composed of a slide frame that is slidably supported and forms a front wall, and inside the set plate is a cassette in which a projection microfilm is stored so that it can be wound up and undone. A cassette loading section is provided in which the film is loaded so that the film image is in the upright position when viewed from the front.A battery, a motor, and a speed reduction mechanism are built into the rear part of the main frame, and the upper part of the main frame is A take-up shaft and a rewind shaft are built in, which fit into the take-up spool and unwind spool of the cassette, respectively, and are driven by the motor via the deceleration mechanism, and an operation panel is provided on the upper surface of the main frame. , a magnetic head for reading magnetic information on the magnetic tape of the projection microfilm and a blip sensor for detecting blip marks on the projection microfilm when the slide frame is pulled out. , an illumination body that transmits and illuminates the projection microfilm is provided at the front of the slide frame, and when the slide frame is pulled out, the film image of the projection microfilm that is transmitted and illuminated by the illumination body is enlarged. A portable microfilm viewer characterized by being equipped with a magnifying glass.