JPS62262843A - Portable type microfilm reader - Google Patents

Abstract

PURPOSE:To make the titled reader compact by attaching integrally a keyboard operating part whose key is operated in order to operate a reader and to retrieve a film frame, to the upper face of a cassette holder which has been provided so as to be freely liftable on the reader body. CONSTITUTION:On this side of a reader body 1, a keyboard 10 and a liquid crystal display panel 11 are provided, and the liquid crystal display panel 11 is erected at the time of use, and held in an attitude in which a display is easily visible. Also, the keyboard 10 and the liquid crystal display panel 11 are provided so as to ascend, and in this state, a cassette 12 can be loaded and taken out. The cassette 12 contains a supply reel 13 and a winding reel 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable microfilm reader that reproduces images from microfilm stored in a cassette.

[Conventional technology]

For example, a microfilm reader is used to enlarge a photographic image recorded on a 16 mm wide roll film to approximately A4 size for viewing. Such a microfilm reader includes a cassette loading section into which a cassette containing wound microfilm is loaded, and a light source section that illuminates a predetermined frame of the microfilm pulled out from the cassette.
It includes a projection optical system that enlarges and projects the illuminated image of the predetermined frame, and a screen on which the enlarged image projected by the projection optical system is projected. In recent microfilm readers, in consideration of portability when not in use, T-type readers are also available in which the screen can be folded up to form a compact, thin box.

Some of these microfilm readers are equipped with a display section such as a liquid crystal panel and a keyboard operation section in addition to a screen on which reproduced images are projected. This display section is used to display the input frame address when searching for a desired frame from a series of microfilms, and to display the microfilm reader's ti creation menu.The keyboard operation section is used to It is used for inputting operation signals and frame addresses to be searched.

By the way, in a microfilm reader that uses a cassette, it is necessary to engage the shaft of the reel that winds the microfilm with the drive shaft provided on the reader body side, so the loading direction of the cassette is must match the direction of the drive shaft. In order to make the reader body thin and compact, and to make it easy to load and remove cassettes from the front side of the reader body, the image playback position of the cassette must be positioned below the front side of the screen that is being stood up. It is effective to set the position to the position of lying down on the side.

In order to move the cassette to the above-mentioned image playback position, a cassette holder for holding the cassette is provided on the front side of the reader body so that it can be raised and lowered, and when loading or unloading the cassette, the force center holder is placed on the reader. The cassette is configured to protrude from the main body, and the cassette and cassette holder are accommodated within the main body during image reproduction.

[Problem that the invention seeks to solve]

However, when the cassette holder is provided in front of the screen so that it can be raised and lowered as described above, there is a drawback that it becomes difficult to take up space for installing the keyboard operation section. In particular, in a device that allows automatic search for a desired frame by manual key operation, the keyboard operation section must be equipped with a so-called numeric keypad in addition to the operation keys for basic operations of the slider. Therefore, the space for key arrangement is quite large. Since this keyboard operation section will be placed on the front side of the reader body from the viewpoint of operability, the reader body will have space for installing the cassette holder that can be raised and lowered as described above.
A space for installing the keyboard operation section was also required, which caused problems in making the microfilm reader more compact.

The present invention has been made to solve the above-mentioned problems that hinder the miniaturization of portable microfilm readers. The purpose of the present invention is to provide a portable microfilm reader.

[Means for solving problems]

In order to achieve the above object, the present invention provides a keyboard operation on the top surface of a cassette holder that is configured to be able to move up and down between a loading preparation position protruding from the reader body and an image playback position housed within the contour of the reader body. The section is arranged as follows. That is, the upper surface of the cassette holder itself is used as the installation part for the keyboard operating section, so that there is no need to provide a special space for the keyboard operating section in the reader body.

According to a preferred embodiment of the present invention, a display section for displaying input information on the keyboard operation section is also provided on the top surface of the cassette holder, and these are all placed together in front of the screen. This facilitates downsizing of the reader body and at the same time maintains good operability.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the attached drawings.

Example C] In FIGS. 1 and 2, which respectively show the unused state and the used state of the microfilm reader using the present invention,
A top lid 2 that can be opened and closed is attached to the reader body 1 via a well-known hinge mechanism provided at the rear end.

From the state shown in FIG. 1, when the buttons 3 provided on both sides of the top cover 2 are pressed, the hook 4 is disengaged from the locking hole formed in the reader body 1, and the top cover 2 is opened by the biasing force of the spring described later. At the same time, the screen 5 rises to follow this.

A plurality of light shielding plates 8 are provided on both sides between the screen frame 7 holding the screen 5 and the reader body 1. These light-shielding plates 8 are composed of a plurality of blades, as will be described later, and are sequentially pulled out as the screen 5 rises to cover the reader body 1. Top lid 2. A triangular opening formed by the screen frame 7 is shielded from light. Also, since the -4- lid 2 blocks light from the back of the screen 5, the area behind the screen 5 is the upper lid 2. Light shielding plate 8. The reader body 1 allows the light to be completely shielded.

A keyboard 10 and a liquid crystal display panel 11 are provided on the front side of the reader main body 1. LCD display panel 11
When in use, the display is erected as shown in FIG. 2 and held in a position where the display can be easily viewed.

Further, as will be described in detail later, the keyboard 10 and the liquid crystal display panel 11 are raised as shown in FIG. 4, and the cassette 12 can be loaded and removed in this state.

As shown in FIG. 3(A), the cassette 12 contains a supply reel 13 and a take-up reel 14. The cassette 12 is provided with a guard panel 15 which is normally locked in the closed position. When the lock release button 16 is pressed, the guard panel 15 is unlocked and
) can be opened as shown in . When the guard panel 15 is opened, the microfilm 20 is exposed. A magnetic tape 21 is connected to the leading end of the microfilm 20, and search information and the like regarding the images captured on the microfilm 20 are recorded on the magnetic tape 21. Further, a blip mark 20a is recorded on the margin of each frame of the microfilm 20, and as is well known, the number of frames to be advanced can be counted by optically detecting this. A space 1B is formed at the bottom of the cassette 12 so as to extend to the back surface of the microfilm 20. As will be described later, during use, a part of the illumination optical system enters into this space 18 to provide illumination from the back side of the microfilm 20.

In FIG. 5, which shows the arrangement of the optical system in use, the space 18 formed in the cassette 12 includes a cold mirror 25 for directing illumination light from the lamp 23 and the light source mirror 24 toward the microfilm 20. will be entered. As is well known, the cold mirror 25 transmits heat rays and reflects visible light, and prevents the microfilm 20 from becoming high temperature. Further, the cold mirror 25 is held by a raised piece 27a of the chassis 27 made of a metal plate, and this raised piece 27a also acts as a heat sink for absorbing and radiating the heat transmitted through the cold mirror 25.

In addition to condensing lenses 28 and 29, the chassis 27 includes pressure plate glasses 30. Projection lens 32. A trapezoidal prism 33 for changing the image attitude is attached. The pressure plate glass 30 is movable in the direction of the projection optical axis P, as is well known. When loading the cassette 12, the microfilm 20 is moved to the right by a solenoid (not shown) to facilitate insertion of the microfilm 20 into a predetermined film gate, and when in use, it is pressed against the microfilm 20 so that the microfilm 20 is moved in the optical axis direction. Prevents people from coming into contact with it. Also,
The projection lens 32 can be moved forward and backward along the projection optical axis P for focus adjustment. Trapezoid prism 33
has the effect of inverting the left and right sides of the image taken on the microfilm 20 so that it can be viewed as a correct image on the screen 5. and,
The reproduced light beam passing through the photographic lens 322 and the trapezoidal prism 33 is reflected by the mirror 35, and then an image is projected onto the back surface of the screen 5. Note that this trapezoidal prism 33 can be omitted if the image is photographed on the microfilm 20 in consideration of the image orientation on the screen 5. Further, if the trapezoidal prism 33 is made rotatable about the projection optical axis P, the attitude of the image on the screen 5 can be changed by rotating the trapezoidal prism 33.

The mirror 35 is supported by a mirror frame 37 via a mirror holding plate 36 bonded to its back surface.

A leaf spring 3 is installed between the mirror frame 37 and the front surface of the mirror 35.
8 is interposed, and the inclination of the mirror 35 with respect to the mirror frame 37 can be adjusted by tightening a screw 39 screwed into the back surface of the mirror frame 37. Mirror frame 37
A pin 42 that engages with a straight groove 41 formed in the side plate 40 is fixed to the side plate 40 . Then, this pin 42 and the side plate 4
A spring 43 is hung between the pin 42 and the pin 42 to urge the pin 42 to the right. Further, on the other end side of the mirror frame 37, a mirror arm 4 whose one end is pivoted to the shaft 45 of the side plate 40 is provided.
7 is attached to the shaft.

The mirror arm 47 has a long hole 48. A notch 49° cam groove 50 is formed. A pin 53 mounted on the other end of a screen arm 52, one end of which is pivoted to the screen frame 7, is engaged with the cam groove 50.

A spring 55 is hung between this pin 53 and a shaft 54 that pivots the mirror frame 37 and mirror arm 47, and biases the screen arm 52 counterclockwise around the shaft 56. are doing. Moreover, on the inner surface of the side plate 2a of the upper lid 2,
A guide groove 58 is formed with a wide portion 58a at the bottom. The screen frame 7 is rotatable with respect to the side plate 40 by a shaft 60, and a pin 61 protruding from the tip of the screen frame 7 engages with the guide groove 58.

When folding the screen after use, first push the screen frame 7 and rotate it clockwise about the shaft 60. As a result, the pin 53 at the tip of the screen arm 52 is guided by the inclined portion 50a of the cam groove 50, so that the screen arm 52 resists the bias of the spring 55 at the time of startup and smoothly moves clockwise around the shaft 56. It will descend while rotating. In addition, at this time, the upper lid 2 comes to be slightly lifted in the opening direction. By further pushing down the screen frame 7, the screen arm 52
The pin 53 rotates clockwise to the position where it abuts the end of the straight portion 50b of the cam groove, and as a result, the screen frame 7
is being folded. During this time, the pin 61 of the screen frame 7 moves along the guide a58, so that the upper lid 2 gradually closes in conjunction with the fall of the screen frame 7.

Then, after the pin 53 reaches the end of the straight portion 50b of the cam groove, when the screen frame 7 is further pushed down,
The mirror arm 47 is pushed down by the edge of the screen frame 7, and the mirror arm 47 is rotated clockwise about the shaft 45. The tip of the mirror arm 47 is pivotally attached to the mirror frame 37 via the shaft 54, and the pin 42 protruding from the mirror frame 37 is engaged with the straight groove 41 of the side plate 40, so that the mirror can be rotated as described above. As the arm 47 rotates clockwise, the mirror frame 37 is moved by the spring 43.
It rotates clockwise around the pin 42 while sliding to the left against the bias of the pin 42.

In this way, by pushing down the screen frame 7, the mirror 35. The upper lid 2 is folded, but when the pin 61 of the screen frame 7 reaches the wide part 58a of the guide groove 58, as shown by the two-dot chain line in FIG. The connection with the will be severed. At this point, while holding down the screen frame 7 with one hand, push down the top cover 2 with the other hand, and the pin 6 of the screen frame 7
1 is pushed by the upper edge of the wide portion 58a, the screen frame 7 is also folded down in conjunction with the closing of the top lid 2, and thereby the mirror 35 is also folded. When the top cover 2 is completely lowered to the closed position, the hook 4 (first
(Fig. 6) is engaged with a locking hole formed in a required portion of the leader body 1, and folded as shown in Fig. 6. In addition, the 6th
In the figure, springs 43 and 5 are shown to avoid complication of the drawing.
5 etc. are omitted. By being folded in this manner, the outer shape of the microfilm reader becomes a thin box shape as shown in FIG.

When raising from the state shown in FIG. 1 to the use state, the upper M2 is unlocked by pressing the button 3.
The mirror frame 37. is biased by the springs 43, 55. Mirror arm 47. Via the link mechanism constituted by each of the screen arms 52, the screen frame 7 rises toward the use position shown in FIG. Finally, lift the screen frame 7 and insert the pin 53 into the cam groove 50.
The terminal end of the inclined portion 50a is brought into contact with the terminal end of the inclined portion 50a, and the device is set in the operating condition shown in FIG.

A bottom plate 66 made of a metal plate is supported in a part of the plastic glue-mounted gauge 65 to which the side plate 40 made of a metal plate is fixed, so as to be openable and closable. Then, the lamp mounting part 67 and the light source mirror 2 for removing the lamp 23 are installed.
4 is fixed to this bottom plate 66. Therefore, when the bottom plate 66 is opened as shown by the two-dot chain line in FIG. Since the UNISO 1- is exposed to the outside, the work of replacing the lamp 23 becomes very easy. In addition, the metal bottom plate 66:
Since it faces the evening light directly without being covered by the exterior case 5, it is advantageous to dissipate the heat from the lamp 23 to the outside, so why not use the cooling fan 69? By using jf, a considerable heat dissipation effect can be achieved.

As shown in FIG. 7, a power supply unit 70 and a control unit 71 are installed on the back side and near the center of the reader body 1, respectively. power supply unino l-
70 is a plug 7 that includes an A (i - I) C converter, a voltage stabilization circuit, etc., and supplies AC power.
It has two sockets 73.

The control unit 71 includes various control circuits for controlling the drive of the motor for feeding and rewinding the microfilm 20, counting the number of film frames, and searching for a predetermined frame. include. Reader body 1
A cassette holder section for receiving the cassette 12 and a film drive mechanism such as a motor are installed on the front side of the keyboard 10, that is, below the keyboard 10, so that the weight tends to be biased toward the front. Therefore, by installing the heavy power supply unit 70 on the back side of the reader main body 1, weight balance can be maintained. In this way, the reader body 1
Balancing the weight distribution inside the device will make it easier to carry, and will also improve stability when installed during use.

The chassis 27, which is fixed to the inner surface of the exterior case 65 with the same inclination as the projection optical axis P, engages with the hub of the supply reel 13 or the take-up reel 14 housed in the cassette 12, and drives either of them. A pair of drive shafts 73.74
is provided.

These drive shafts 73 and 74 each have a reel gear 75.
．． It is driven by the rotation of 76.

As illustrated for the drive shaft 74 in FIG.
It rotates together with the shaft 76a of the reel gear 76, but has a degree of freedom in the vertical direction due to the coil spring 77.

Driven gears 80, 81 that rotate coaxially are provided below the reel gears 75, 76, respectively. These reel gears 75, 76 and driven gears 80, 81 are each connected via a one-way clutch. That is,
As illustrated on the take-up reel side in FIGS. 7 and 8, the reel gear 76 is rotated via a one-way clutch consisting of a helical cam 76b integrated with the reel gear 76, a thalassochi hole 82, and an inner wall 81a of the driven gear 81. When rotated clockwise, the driven gear 81 rotates. On the other hand, on the supply reel side, the driven gear 80 rotates only when the reel gear 75 rotates clockwise. A brake gear 83.84 meshes with each driven gear 80.81. Brake gear 83.84
is a compressed coil spring 85 as shown in FIG.
applies rotational load to the brake gear 84, and when the driven gears 80 and 81 rotate, each glue gear 75
．． Resistance is added to the rotation of 76.

The reel gears 75 and 76 are rotated by the driving force of a motor 88 fixed to the chassis 86.

That is, when the beher gear 89 rotates clockwise due to the rotation of the motor 88, the interlocking gear 91 rotates counterclockwise via the gear 90 (see FIG. 9) that rotates together with the beher gear 89 on the back side of the chassis 86. do. A swingable gear arm 94 is attached to a shaft 92 of the interlocking gear 91, and an oscillating gear 95 that meshes with the interlocking gear 91 is pivotally attached to the gear arm 94. When the interlocking gear 91 rotates counterclockwise as described above, the rotational force generated by the meshing of the interlocking gear 91 and the oscillating gear 95 causes the gear arm 94 to swing counterclockwise to the position where it contacts the stopper 96a. move. As a result, the oscillating gear 95 meshes with the reel gear 75, so that the reel gear 75 rotates counterclockwise.

When the reel gear 75 is thus rotated counterclockwise by the driving force of the motor 88, the microfilm 20 wound around the take-up reel 14 of the cassette 12 is
It is now rewound onto the supply reel 13. On the other hand, the reel gear 76 is rotated counterclockwise by the tension of the microfilm 20;
6 rotates counterclockwise, the rotation is transmitted to the driven gear 81, so the brake gear 84 operates and provides resistance to the reel gear 76. As a result, an appropriate tension is always applied to the microfilm 20 during rewinding, and even if the microfilm 20 is suddenly stopped during high-speed rewinding, the microfilm 20 will not flap at the predetermined film gate. This makes it possible to prevent scratches on the surface of the magnetic head and maintain good adhesion between the magnetic head and the magnetic tape 21.

When the motor 88 is reversed and the bevel gear 89 is rotated counterclockwise, the gear arm 94 moves to the stopper 96b.
The take-up reel 14 is driven via the reel gear 76, and the microfilm 20 is sequentially fed. In this case, since the reel gear 75 is driven to rotate clockwise, the driven gear 80. A load is applied to the supply reel 13 via the brake gear 83, and an appropriate tension is similarly applied to the microfilm 20. Note that a positioning pin 97 is provided protruding from the chassis 27 and engages with a positioning hole formed in the bottom surface of the cassette 12 when the cassette 12 is loaded.

The cassette 12 is loaded after the cassette holder 100 is popped up, as shown in FIG. Since the keyboard 10 and the liquid crystal display section 12 are fixed to the upper surface of the cassette holder 100, these are also projected outside the outline of the reader body 1 together with the cassette holder 100. When the cassette holder 100 protrudes to the loading preparation position shown in FIG. 4, the front side of the cassette holder 100 is oriented upward, making it easier to insert the cassette 12 through the opening 100a. The electrical connections between the keyboard 10 and the liquid crystal display panel 11 and the control unit 71 are made by, for example, a flexible printed board whose surface is insulated so as not to interfere with the movement of the cassette holder 100 up and down. .

In FIGS. 9 and 10 showing the pop-up mechanism of the cassette holder 100, link levers 101 and 102 connected in an X-shape are attached to both sides of the chassis 27, respectively. One end of the link lever 101 is pivotally attached to the chassis 27 together with the link lever on the other side by a connecting shaft 103 . In addition, this connecting shaft 103
A hook lever 105 is also pivotally attached to the. The hook lever 105 rotates to the right to the position shown in FIG. 9 when the solenoid 106 is driven, and is placed in the position shown in FIG. 10 by the bias of a spring built into the solenoid 106 when the solenoid 106 is not driven. .

The other end of the link lever 101 has a pin 1 implanted therein.
07, it engages with the straight groove 109 of the holder base 10B. The pin 110 implanted at one end of the other link lever 102 is connected to the straight portion 1 formed on the chassis 27.
11a and an inclined portion 111b. The other end of this link lever 102 is pivotally attached to a holder base 108 by a shaft 104. These link levers 101 and 102 are pivoted to each other at their intermediate portions, and are urged by a spring 112 toward the protruding position shown in FIG.

In addition, in this protruding position, the attitude|position of the cassette holder 100 is set upward rather than horizontally as mentioned above.

A lock release plate 114 made of a leaf spring is provided on one side of the cassette holder 100, and the tip thereof projects into the cassette holder 100.

Therefore, as shown in FIG.
0 is popped up and the cassette 12 is inserted into the holder to a predetermined position, the tip of the lock release plate 114 presses the lock release button I6, and the guard panel 15 becomes openable.

After inserting the cassette 12 into the cassette holder 100, by pressing down on the keyboard 10,
The cassette 12 is moved together with the cassette holder 100 to the playback position.

While the cassette 12 is descending together with the cassette holder 100, the lower edge of the guard panel 15 comes into contact with a protrusion 115 formed on the chassis 27 as a raised portion for opening the guard panel.

Then, by further lowering the cassette holder 100, the guard panel 15 is relatively lifted up by the protrusion 115. When the guard panel 15 is lifted, the liquid crystal display panel 11 is rotated to the left against the return spring 116 under the pressure of the guard panel 15 .

When the loading completion position shown in FIG. 10 is reached, the holder 105 engages the shaft 104, and the cassette/slot holder 100 is held at that position. In this state,
The keyboard 1o is housed within the outline of the reader body 1, and the liquid crystal display panel II is raised up to a predetermined angle. As is well known, liquid crystal displays can be difficult to observe depending on the angle of incidence of illumination light, but by standing up the LCD panel II and having its display surface directly facing the viewer, the display can be viewed very easily. It becomes easier to see.

Further, since the keyboard 10 also becomes lower toward the front, key operations become easier.

As shown in FIG. 4, the holder base 108 is formed with openings 117 and 118 through which the drive shafts 73 and 74 pass, as well as openings 119 through which the positioning pins 97 protrude. When the holder 100 reaches the loading completion position shown in FIG.
Each hub of the wheels 14 engages a drive shaft 73,74. As illustrated in FIG. 8, the upper end of the claw 74a integrated with the drive shaft 74 is formed into a tapered surface, so that when the drive shaft 74 engages with the hub of the take-up reel 14, It acts to rotate the take-up reel 14 slightly in the winding direction (clockwise in FIG. 7). The other drive shaft 73
A reverse taper is formed on the upper end of the pawl integrated with the pawl, which acts to rotate the supply reel 13 in the unwinding direction (counterclockwise in FIG. 7) when the pawl is engaged. do. This ensures that when the drive shaft 73.74 engages the respective reel 13.14, the drive shaft 73.7
The drive shafts 73 and 74 are connected to the supply reel 132 and the take-up reel 1 without causing any jamming or the like in the gear series connected to the supply reel 132.
It comes to smoothly engage with each of the hubs of 4.

Incidentally, in order to block light from both sides behind the screen 5 when the screen 5 is stood up, a plurality of light shielding plates 8 are used as shown in FIG. This light shielding plate 8 has five blades 8a, 8 as shown in FIG.
It is composed of b, 8c, 8d, and 8e. These blades 8a to 8e are pivoted to the shaft 6o of the screen frame 7, and when the screen 5 is stood up, the blade 8e closest to the screen 5 is the shortest, and the blade 8a closest to the leader body 1 is the longest. They are formed to be longer in the order closer to the reader main body 1.

On the tip side of each of the blades 83 to 8e, arc-shaped nozzles t-125a to 125e are formed. and,
A pin 126 protruding from the leader body I is engaged with the slot 125a of the blade 8a. Also, slot 1
25b has a pin 127a protruding from the blade 8a, and slot 125c has a pin 127 protruding from the blade 8b.
A pin 127c protruding from the blade 8c is engaged in the slot 125d, and a pin 127d protruding from the blade 8d is engaged in the slot 125e.

In this way, by connecting the blades 8a to 8e with pins and slots, the blades 8a to 8e are sequentially pulled out when the screen frame 7 is raised, and the adjacent blades partially overlap each other. A reliable light blocking function can be obtained. Moreover, blade 8a~
Since the length of 8e becomes shorter toward the screen 5 side, when storing them in a stacked manner as shown in FIGS. 12 and 15, each pin 127a
~127d will no longer collide with each other, and can be accommodated in a thin space.

The uppermost blade 8e is inserted into a screw 128 through a bent portion 129 formed at its upper end, as shown in FIG.
It is fixed to the screen frame 7 by. Further, the back surface of the screen 5 is held by this bent portion 129, and as a result, both the screen 5 and the blade 8e are integrated with the screen frame 7 by screws 128.

The lower edges of each of the blades 8a-8e are bent inward to increase strength, as shown in FIG. Moreover, notches 130a, 130b, and 130C are formed in the upper edges of the blades 8a to 8C. These notches 130a to 130C are wider toward the bottom, and as shown in FIG.
When 8e is folded, the heads of pins 127b to 127d are inserted into the receiver. In addition, pin 127b~
If the amount of protrusion of the head of 127d is small, the notch 130
It is not necessary to make widths a and 130b wide.

A pin 132 that engages with the elongated hole 48 of the mirror arm 47 is protruded from the lower edge of the blade 8a, and a pin 133 that engages with the notch 49 of the mirror arm 47 is protruded from the lower edge of the blade 8b. .

These pins 132, 133 function to restrict the movement of the blades 8a, 8b when the screen frame 7 is laid down and the light shielding plates 8 are stored in an overlapping manner. That is, blades 3a, 8. b indicates that the pins 132 and 13 are closed until the mirror arm 47 is lowered.
3, the blades 80 to 8d are held in the position shown in FIG. 11, during which time the blades 80 to 8d are rotated by free fall. Therefore, the longer blades 8a and 8b rotate at the beginning of the fall of the screen frame 7, which prevents a gap from being formed at the lower edge of the side plate 2a of the top cover 2, which can prevent foreign objects from entering or pinching fingers. This is effective in preventing accidents.

When using the microfilm reader configured as described above, first, the AC plug 72 is connected to the connector 73 to supply power to the power supply unit 70. The control unit 71 is powered by the power supply unit 70.
is activated, and each control circuit enters a standby state. Then, when button 3 is pressed, the upper lid 2. The screen 5 is a spring 43,
It slowly stands up due to the bias of 55. and,
When this rising is interrupted, the screen 5° mirror 35 is set at a predetermined use position by pulling up the screen frame 7 toward you. In conjunction with this, the blades 8a to 8e, which were stored one on top of the other, are also lifted one after another, and the case body 1.
A dark box is formed by the upper lid 2 and the light shielding plate 8.

When a predetermined key is pressed manually from the keyboard 10, the solenoid 106 is driven for a certain period of time, and during this time the foot lever 1 is activated.
05 rotates from the locked position shown in FIG. 10 to the unlocked position shown in FIG. When the fun lever 105 moves to the release position in this way, the link levers 101 and 102 are released by the spring 11.
The cassette holder 100 stands up due to the bias of the fourth cassette holder 100.
It will pop up to the position shown in the figure or Figure 9.

At this time, in order to prevent the cassette holder 100 from popping up suddenly, it is desirable to provide a shock absorber such as an oil damper at an appropriate location.

The cassette 12 is inserted into the cassette holder 100 that has been popped up in this way. When a certain amount of the cassette 12 is inserted, the lock release plate 114 comes to press the lock release button 16 of the cassette 12, and the guard panel 1
5 is released.

After inserting the cassette 12 to this state, the keyboard I
Press down against the spring 112. As a result, the keyboard 10 and the cassette holder 100 become parallel to the chassis 27 via the link levers 101 and 102, and then descend directly below.

From the middle of this descent, the protrusion 1 provided on the chassis 27
15 is in contact with the edge of the guard panel 15, and the guard panel 1
5 is relatively strong and can be raised.

When the cassette holder 100 is pushed into the predetermined loading position shown in FIG. Take reel 13
．． 14 hubs. Along with this, guard panel 1
Since the magnetic tape 5 has also been rotated to the position shown in FIG. Note that the liquid crystal display panel 11 is erected to a predetermined angle as shown in FIG.

After loading the cassette 12 in this way, when a predetermined key is pressed on the keyboard 10, the motor 88 is driven via the control unit 71, and the interlocking gear 91
rotates clockwise in FIG. As a result, the gear arm 94 rotates to the right, and the oscillating gear 95, which is rotating counterclockwise, meshes with the reel gear 7G, causing it to rotate clockwise. As a result, the winding in the cassette 1-12
The magnetic tape 21 connected to the microfilm 2o is wound up. At this time, the supply reel 13 rotates in a driven manner, and the reel gear 75 rotates clockwise accordingly, so the driven gear 80. A load is now applied to the supply reel 13 via the brake gear 83.

While the magnetic tape 21 is being transferred, the magnetic head 140
(Fig. 7), this information is read by the controller
- Record 1a in the memory provided in the roll unit 71
be done. The information recorded on the magnetic tape 21 includes the number of frames of images recorded on the microfilm 2, table of contents information that compares the type and content of images with frame numbers, etc. The information thus read is then displayed on the liquid crystal display panel 11. When the transfer of the magnetic tape 21 is completed, the motor 88 is automatically stopped and the preparation operation is completed.

When a predetermined film frame to be searched for is manually entered on the keyboard using the table of contents information displayed on the liquid crystal display panel 11, the motor 88 is driven by the control unit 1-71. Then, the blip mark 20a written on the microfilm 20 is
(FIG. 7), when a predetermined film frame is retrieved while counting, the motor 88 automatically stops and the pressure plate glass 30
After pressing the microfilm 20 into a predetermined position, the lamp 23 is turned on, and the image recorded on the target film frame is projected onto the screen 5.

Note that while the microfilm 20 is being transferred, the pressure plate glass 30 is placed in a retracted position.

When the use of the cassette 12 is finished, a key is manually pressed to take out the cassette. As a result, the motor 8
8 is driven, the microfilm 20 and the magnetic tape 2
1 is rewound to the supply reel side. During this rewinding, the swinging gear 95 meshes with the reel gear 75 on the supply side while rotating clockwise, and the reel gear 75 is driven by the driving force of the motor 88. Furthermore, since the reel gear 76 is driven by the tension of the film via the take-up reel 14, the brake gear 84 acts to apply appropriate tension to the film.

When the microfilm 20 and magnetic tape 21 are all rewound onto the supply reel 13, the solenoid 106 is activated. As a result, the Funkreher 105 is rotated to the position shown in FIG. 9, and the cassette holder 100, spring 112. It is popped up by link levers 101 and 102.

Thereby, the used cassette 12 can be taken out.

Note that in order to facilitate the ejection of the cassette 12, it is preferable to provide a cassette ejector such as that used in video decks and the like.

After using the microfilm reader, when carrying it around, the screen frame 7 is pushed down. As a result, the screen arm 52. As the mirror 35 is folded up via the mirror arm 47, the top cover 2 is also folded up via the guide groove 58 and the pin 61 protruding from the screen frame 7. In addition, the light shielding plates 8 are also stored while overlapping each other (.Then, by pushing down the screen frame 7 by an appropriate amount, closing the top lid 2, and engaging the hooks 4 with the locking portions of the case body 1, The keyboard 10 is in the state shown in Figure 1.The keyboard 10 is also pushed down and the shaft 1
04, the keyboard 10 is also housed and held in the position shown in FIG. Further, the liquid crystal display panel 11 is also lowered together with the keyboard 10, but since the cassette 12 is not loaded in the cassette holder 100, it is not raised and is stored in the storage position shown in FIG. become.

As mentioned above, the upper surface of the cassette holder 100 that is raised and lowered in front of the screen 5 of the reader body 1 is connected to the keyboard 1.
When used as the installation space for 0, the standard arrangement of the numeric keys can be arranged as is in the keyboard 10 without changing, which saves space and poses no problem in terms of operability. Furthermore, by integrating the liquid crystal display panel 11 with the cassette holder 100 along with the keyboard 10, these parts can be integrated into a unit, and the control unit 71
Electrical wiring can be done all at once, making assembly work more efficient.

〔Effect of the invention〕

As described above, according to the present invention, the keyboard operating section, which is operated by keys for operating the reader and searching for film frames, is integrally attached to the upper surface of the cassette holder that is provided in the reader main body so as to be able to move up and down. There is. Therefore, it is not necessary to secure a space for installing a keyboard operating section in addition to a space for installing a cassette loading mechanism, and the portable microfilm reader can be made even more compact.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention in an unused state. FIG. 2 is an external perspective view showing an example of the present invention in use. FIGS. 3A and 3B are perspective views of the cassette with the guard panel closed and opened, respectively. FIG. 4 is a perspective view of the cassette holder in a popped-up state. FIG. 5 is a sectional view of essential parts showing a projection optical system and a structure for raising and lowering a screen in an embodiment of the present invention. FIG. 6 is a sectional view of a main part showing a state in which the screen is laid down. FIG. 7 is a fragmentary plan view of essential parts of an embodiment of the present invention. FIG. 8 is a sectional view of the main parts of the beam and brake gear. FIG. 9 is a side view of essential parts showing the cassette holder in a popped-up state. FIG. 10 is a side view of essential parts showing a state in which the cassette holder is locked at the loading completion position. FIG. 11 is a side view of main parts showing a state in which the light shielding plate is opened. FIG. 12 is a side view of essential parts showing a state in which the light shielding plate is closed. FIG. 13 is an explanatory diagram of the light shielding plate in an open state. FIG. 14 is an explanatory diagram of a state in which the light shielding plate is closed. FIG. 15 is a partially cutaway plan view showing the light shielding plate in a closed state. 1...Reader body 2...Top lid 5...Screen 7...Screen frame 8...
Light shielding plate 1o... Keyboard 11... Liquid crystal display panel 12... Cassette 15... Guard panel 16...
Lock release button 23...Lamp 25...Cold mirror 32...
・Projection lens 35...Mirror 37...Mirror frame
47...Mirror arm 52...Screen arm 66...Bottom plate 70...Power supply unit 7I...
Control unit 73.74... Drive shaft 75.76... Reel gear 80.81... Driven gear 88... Motor 94... Gear arm 95... Swing gear 100... Cassette holder 101.102... Link Leno\- 105 ...Losocrehar 106...Solenoid 114...Lock release plate 115...Protrusion. Figure 3 (B)

Claims (2)

[Claims] (1) A portable microfilm reader in which a cassette containing microfilm is held at an image playback position within the reader body, including a loading preparation position protruding outside the outline of the reader body for inserting the cassette; a cassette holder that is housed within the contour of the reader body and is movable between a loading completion position and a loading completion position for holding the inserted cassette at the image reproduction position; 1. A portable microfilm reader characterized by comprising: a keyboard operating section that moves in unison with the microfilm reader. (2) The portable microfilm reader according to claim 1, wherein a display section for displaying input information from the keyboard operation section is disposed on the top surface of the cassette holder.