JPH0527341A - Instant photographing system copying device - Google Patents

Abstract

PURPOSE:To enable the adjustment of an exposure quantity without adjusting external illumination in the case of transmission tape copying, and to adjust the illuminating means in a main body and to facilitate the correction of the exposure quantity with a simple constitution in the case of reflection type copying. CONSTITUTION:Between a stabilization circuit 43 and an illumination driving circuit 46 and between a stabilization circuit 44 and a motor driving circuit 45, volume resistances 47b, 47a functioning as a brightness adjusting means 40B and a speed adjusting means 40A for adjusting the voltage values of each driving voltage Vf, Vm are connected. The speed adjusting means 40A is selected while being interlocked with the selection of the transmission type by the selecting means 48, and when the resistance value of the volume resistance 47a is made high, the driving voltage Vm of a motor 23 drops down, and the scanning speed of an optical means is reduced, and then, the exposure time is elongated so as to increase the exposure quantity. The brightness adjusting means 40B is selected while being interlocked with the selection of the reflection type, and when the resistance value of the volume resistance 47b is made high, the brightness is increased so as to increase the exposure quantity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant photocopier.

[0002]

2. Description of the Related Art As a conventional instant photocopier, a window hole is provided in the bottom surface of the main body case of the apparatus, and the main body case is placed on the original image so that the window hole faces each other. An optical unit (for example, a rod lens array) built in the main body case is moved in parallel along the surface of the original image by the conveying unit, and an illumination unit (for example, a fluorescent unit) that moves together with the optical unit when a reflection type copy is made. Light) always illuminates the original screen. In the case of transmissive copying, the illumination means inside is turned off, the light from the illumination inside the light box provided outside is irradiated from below the original image, and the original image is transmitted to reach the optical means. There is. There is a holder that stores instant film on the body case,
A small area of the original is projected and imaged on the instant film via the optical means, and the original is copied to the film by moving the optical means from one to the other. It is known that the photographic density D when a film is exposed is determined as a function of the exposure amount E, that is, the reciprocity law. If the intensity of incident light is I and the exposure time is t, E = It Therefore, in order to copy a high quality image on an instant film, it is necessary that the exposure amount E is appropriate. The exposure time t is the reciprocal of the scanning speed. Therefore, in the case of the conventional reflection type, the sensor detects the brightness (intensity I of the incident light) of the fluorescent lamp, which is the illuminating means, and a motor for determining the scanning speed. The number of rotations is detected by a sensor, which is fed back to the illumination drive circuit and the motor drive circuit to keep the brightness constant and the motor rotation number constant to stabilize the exposure amount. Further, in the case of the conventional transmissive type, the exposure amount is stabilized by adjusting the brightness by mounting an appropriate neutral density filter or the like on the light box or changing the power supply voltage of the light box.

[0003]

In the case of the transmission type copying of the above-mentioned conventional example, various components such as a neutral density filter must be prepared in addition to the main body of the copying apparatus, which is complicated and inconvenient. In addition, when a dark filter is mounted, there is a problem that correction is impossible when the brightness of the light box is dark. In the case of reflection type copying, in order to detect the brightness of the illumination means and the rotation speed of the motor separately and stabilize them, the number of parts increases, the circuit configuration becomes complicated, and the cost is reduced. To rise. In addition, there is a problem that miniaturization becomes difficult.

Therefore, the object of the present invention is to enable adjustment of the exposure amount without the need for adjusting the external illumination in the case of transmissive copying, and to provide it in the main body also in the case of reflective copying. The adjustment of the adjustment means of the brightness or the scanning speed is sufficient, the structure is simplified and the exposure amount is easily corrected, and the exposure amount is always kept at an appropriate value to enable the copying of a high quality image.

[0005]

In order to achieve the above object, an instant photographic copying apparatus of the present invention forms an image of an illumination means for illuminating a subject and a fine area of the subject on a photosensitive surface of an instant photographic photosensitive material. Optical means, driving means for scanning the optical means in parallel to the object, reflection type copying for turning on the illumination means for copying, and transmission type copying for turning on the externally provided lighting to perform copying. It has a selecting means for selecting and a speed adjusting means for adjusting the scanning speed of the driving means when the transmission type copying is selected by the selecting means.

The speed adjusting means is, for example, a means for changing the voltage of the drive signal supplied to the driving means or a means for changing the duty of the drive signal.

Further, in addition to the above speed adjusting means, there is provided a brightness adjusting means for adjusting the brightness of the illuminating means when the reflection type copy is selected by the selecting means.

[0008]

When the transmissive copy is selected by the selecting means, the scanning speed of the driving means is adjusted by the speed adjusting means, so that the exposure amount can be adjusted without adjusting the illumination provided outside.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The schematic construction of an instant copying apparatus of the present invention will be described with reference to FIGS. A window 2b through which the original image 1 can be seen is formed in a bottom plate 2a of a main body case 2 which is placed on the original image 1 which is a subject, and the window hole 2b is made of a transparent material such as glass or acrylic resin. The plate 3 is fixed so that the bottom surfaces thereof are flush with each other. Further, the upper plate 2c has an opening 2d in a positional relationship facing the window hole 2b of the bottom plate 2a.
Is formed.

The cassette holder 4 for accommodating the instant film is provided with a window hole 4a on its lower surface.
And the opening 2d face each other, and are fixed to the main body case 2 via the spacer 7. The cassette holder 4 is provided with an upper lid 4b for loading and unloading the film cassette, and the upper lid 4b is rotatably supported around a shaft 5 fixed to the left end portion of the cassette holder 4 main body. A lock arm 4c is attached to the right end of the main body of the cassette holder 4 to lock the upper lid 4b in the closed state.

A film cassette 10 containing a plurality of peeling type instant films (instant photographic photosensitive materials) 9 is mounted on a cassette holder 4. The instant film 9 is divided into two forks at the rear end of the pull-out tongue 9a, and a printing film (printing screen) 9 is provided at each end of the fork.
b and a photosensitive film (photosensitive surface) 9c are fixed to face each other, and a developer 9d contained in a bag is attached to one of the two forks. The instant film 9 is folded and stored inside the cassette 10, and the photosensitive film 9c at the lowermost position is a window hole 10 formed on the lower surface of the cassette 10.
In the state where the cassette 10 is set in the holder 4 when exposed from a, the photosensitive film 9c faces the window hole 2b in parallel with the bottom plate 2a. By pulling out the pull-out tongue 9a between the pair of rollers 12 and 12 attached to the cassette holder 4, the bag containing the developer 9d is broken and the developer is applied between the printing film 9b and the photosensitive film 9c. , Development and fixing are performed.

Next, as shown in FIGS. 6 and 7, a pair of guide rods 13 are provided on both sides of the main body case 2 in parallel to the bottom surface, and both guide rods 13 are provided on both ends of the carrier 14. The through hole and the U-shaped groove. Therefore, the carrier 14 is guided by the guide rod 13 and can move in parallel to the original image 1.

A long groove 14a is formed in the center of the carrier 14, and a rod lens array (optical means) 15 (for example, trade name SELFOC lens) is held in the long groove 14a. The rod lens array 15 is configured to image the strip-shaped region of the original image 1 that is in contact with the lower surface of the transparent plate 3 on the photosensitive film 9c at an equal magnification.

A part of an endless timing belt 19 is attached to one end of the carrier 14 by a mounting bracket and a mounting screw, and the timing belt 19 is wound around a belt wheel 21 supported by a bearing 25 described later. The belt wheel 21 is adapted to rotate in conjunction with the rotation of a drive motor 23, which is a part of drive means fixed to the main body case 2 via a gear train 22. Therefore, the carrier 14 can reciprocate by rotating the drive motor 23 forward and backward. Limit switches LSW1 and Lsw2 for restricting the movement range of the carrier 14 are provided in the main body case 2.

Illumination means 24 is attached to the carrier 14. A fluorescent lamp is used as the illumination means. A mask (not shown) having a slit-shaped opening is fixed to the outer periphery of the fluorescent lamp at a position facing the original screen below the rod lens array 15, and the illuminance of a small area of the original image 1 to be copied is fixed. Is set to be large.

Bearings 25 are provided above and below the left and right sides of FIG. 7, and a winding means 26 for the light-shielding film 34 is rotatably supported by the bearings 25. That is, in the winding means 26, the shaft 28 is fixed to one end of the winding pipe 27, and the shaft 29 is rotatably loosely fitted to the other end of the winding pipe 27. Shaft 28 inside the winding pipe 27
The coil spring 31 is provided between the shaft 29 and the light shielding film 3
In order to give a tension force to No. 4, they are connected in a state in which they are wound by a certain amount. The shaft 29 is fixed to the belt wheel 21 via an extension rod 30.

The opening 2 is also parallel to the carrier 14.
A pair of light-shielding film guides 32, 32 are provided at a distance wider than the opposite sides of d. One end of the light-shielding film 34 is fixed to the winding pipes 27, 27, and the other end is provided with an angle 33 for the carrier. It is fixed to 14. The light-shielding film 34 is additionally wound a predetermined number of times around the winding means 26, 26 in consideration of the movement range of the carrier 14.
When the coil spring 31 is attached, the coil spring 31
The take-up pipe 27 on the left side is urged by a rotational force in the counterclockwise direction, and that on the right side is urged by a rotational force in the clockwise direction.
As shown in FIG. 6, the light shielding film 34 functions to shield the photosensitive film 9c from light except for the projection portion of the rod lens array 15. When the carrier 14 is in the standby state where it is located at the left end or the right end in FIG. 6, the projection part of the rod lens array 15 is out of the opening 2d and the light shielding film 34 is formed.
Thus, the entire surface of the photosensitive film 9c is shielded from light.

Since this instant photocopier is capable of transmissive copying in addition to reflective copying, as shown in FIG.
5 is provided. The original image 1 is irradiated with light from below by the illumination (not shown) incorporated in the light box 35. This light passes through the original image 1 and reaches the optical means 15.

FIG. 1 shows a circuit block of the above device. By closing the power switch Psw, the power supply E
To a control circuit 42 via a three-terminal regulator 41 for stabilizing the control circuit, and a stabilization circuit 43 for the illumination voltage.
Also, electric power is supplied to the motor voltage stabilizing circuit 44. When the start switch Ssw is turned on, the control circuit 4
2 is controlled by the motor 23 via the motor drive circuit 45.
Is driven in the normal or reverse direction to move the optical means 15 from one side to the other side in parallel to the subject 1. The illumination voltage stabilizing circuit 43 can be turned on / off by a signal P1 from the control circuit 42. Further, the signals P2 and P3 from the control circuit 42 are supplied to the motor drive circuit 45, and the rotation of the motor 23 is controlled. For example, the signal P2 is H, the signal P
When 3 is L, the motor rotates normally, when signal P2 is L, signal P3 is H, the motor rotates in reverse, and when both signals P2 and P3 are L, the motor is controlled to stand by or stop. Lighting voltage stabilizing circuit 43 and motor voltage stabilizing circuit 44
From the above, variable drive voltages Vf and Vm are supplied to the illumination drive circuit 46 and the motor drive circuit 45 by the brightness adjusting means 40B and the speed adjusting means 40A, which will be described later, thereby turning on the illuminating means 24 and rotating the motor 23. To scan the optical means 15. That is, the illumination means 24 is turned on during the scanning of the optical means 15, and the photosensitive surface 9 of the instant film 9 is turned on.
c is exposed to expose the image of the subject 1 on the photosensitive surface 9c.
When the scanning of the optical means 15 is completed, the limit switch Lsw
1 or Lsw2 is closed, and it is possible to determine on which side the optical means 15 is stopped. Optical means 15
When the outputs of the signals P2 and P3 are controlled according to the stop position of, and the start switch Ssw is turned on next,
The motor 23 will rotate in the opposite direction, which in turn will move the optical means 15 from the other to the one.

In this embodiment, the exposure amount is corrected by changing the voltage of the drive signal for the illumination or the motor. And whether to adjust the speed or the brightness,
It depends on whether transmission type copying or reflection type copying is performed, and this is also a selection whether the illumination means 24 is turned off or turned on. As the selecting means 48, a changeover switch 48 is connected to the control circuit 42, and a changeover switch 48a and a changeover switch 48b which are changed over in association with the changeover switch 48 are provided as the speed adjusting means 4.
0A and the brightness adjusting means 40B are provided respectively.

First, the speed adjusting means 40A which is adjusted when the transmission type copying is performed will be explained. As the adjusting means 40A for the motor drive voltage Vm, the terminal X2 and the ground terminal of the motor voltage stabilizing circuit 44 are used. Connect the resistor R3 and the common terminal C of the changeover switch 48a between
One switching terminal A has a volume resistor 47 for output adjustment.
a and a resistor R6 are connected in parallel to the other switching terminal B. A resistor R4 is connected between the terminal X2 and V02.

Next, the brightness adjusting means 40B adjusted when performing reflection type copying will be described. As the adjusting means 40B for the driving voltage Vf for illumination, the terminal X1 of the stabilizing circuit 43 for the illumination voltage and the ground terminal are used. Resistance between R1
Further, a resistor R2 and a common terminal C of the changeover switch 48b are connected between the terminals X1 and V01, one of the changeover terminals A is a resistor R5, and the other changeover terminal B is a volume resistor 47b for output adjustment. Are connected in parallel.

The resistors R1, R2 and R3, R4 are used for determining the output, and are set to a predetermined resistance value so that proper exposure can be achieved at the center of the volume resistors 47a, 47b.
The resistor R5 is a resistor for preventing an abnormal voltage from being applied to the illumination drive circuit 46 when the illumination means 24 is turned off, and the resistor R6.
Is a resistor for keeping the drive voltage Vm for the motor at a predetermined value when the lighting means 24 is turned on. Also, the volume resistor 47
By rotating the common volume knob, a and 47b can be changed together to be large when rotated in the clockwise direction and can be changed to be small in both when rotated in the counterclockwise direction.

The normal stabilizing circuits 43 and 44 have a reference voltage Vref inside, and the output voltage Vf is obtained by dividing the terminals X1 or X2, the output terminals V01 or V02, and the ground terminal with resistors. Or Vm is determined.

Now, assuming that the resistance value of the volume resistor 47b and the resistance value of the volume resistor 47a are both 0,
The values of the voltage Vf1 and the voltage Vm1 supplied to the illumination drive circuit 46 and the motor drive circuit 45 are: Vf1 = Vref {1+ (R2 / R1)} (1) Vm1 = Vref {1+ (R4 / R3)} (2) Since the resistance value of the volume resistance is not included, both are constant.

Next, the values of the voltage Vf2 and the voltage Vm2 supplied to the illumination drive circuit 46 and the motor drive circuit 45 when the resistance values of the volume resistors 47b and 47a are changed to the maximum resistance values Rv1 and Rv2, respectively, Vf2 = Vref {1+ (R2 + Rv1 / R1)} (3) Vm2 = Vref {1+ (R4 / R3 + Rv2)} (4).

The values of the voltage Vf3 and the voltage Vm3 supplied to the illumination drive circuit 46 and the motor drive circuit 45 when the changeover switch 48b is conductive between the terminals C and A and when the changeover switch 48a is conductive between the terminals C and B. Vf3 = Vref {1+ (R2 + R5 / R1)} (5) Vm3 = Vref {1+ (R4 / R3 + R6)} (6), which is constant because it does not include the resistance value of the volume resistor.

Now, when performing the reflection type copying, when the changeover switch 48 is changed over so that the common terminal C and the changeover terminal B are electrically connected, the changeover switches 48a, 48a.
The common terminal C and the switching terminal B are also switched so that the common terminal C and the switching terminal B are electrically connected together. Output signal P1 from control circuit 42
Is output, and a voltage appears at the output terminal V01 of the stabilizing circuit 43. Further, the rotation direction of the motor 23 is determined by the output signals P2 and P3 from the control circuit 42, and a voltage appears at the output terminal V02 of the stabilizing circuit 44. So volume resistor 47
When the volume knobs a and 47b are rotated in the clockwise direction, the drive voltage of the illumination means 24 changes from the voltage Vf1 to Vf2 as shown in the above formulas (1) and (3). Since Vf1 <Vf2, the drive voltage of the illumination means rises and the luminance rises. Since the changeover switch 48a has its terminals C and B electrically connected and is connected to the resistor R6, the drive voltage Vm3 is a constant value as shown in the equation (6), and the scanning speed of the optical means 15 is constant and the exposure is performed. The time is constant. Therefore, in the case of reflection type copying, the exposure amount can be adjusted by changing the brightness.

This time, in the transmission type copying, when the changeover switch 48 is changed over so that the common terminal C and the changeover terminal A become conductive, the changeover switches 48a, 48a, 4
8b is also interlocked and switched so that the common terminal C and the switching terminal A are electrically connected. At this time, since the signal P1 from the control circuit 42 is not output, no voltage appears at the output terminal V01 of the stabilizing circuit 43 and the lighting means 24 does not light. Instead, the original image 1 is illuminated with a constant brightness by turning on the illumination by the light box 35. In addition, the motor 2 is controlled by the output signals P2 and P3 from the control circuit 42.
3 is determined, and the output terminal V of the stabilizing circuit 44 is determined.
Voltage appears at 02. Therefore, the volume resistors 47a, 47
When the volume knob of b is rotated clockwise, the drive voltage of the motor 23 changes from the voltage Vm1 to Vm2 as shown in the above equations (2) and (4). Vm1> V
Since it is m2, the drive voltage of the motor 23 decreases, which slows down the scanning speed of the optical means 15 and lengthens the exposure time. Therefore, in the case of transmission type copying, the exposure amount can be adjusted by changing the exposure time.

Brightness adjusting means 50 shown in FIGS. 2 (a) and 2 (b).
The B and speed adjusting means 50A use three-terminal type volume resistors 57 and 58 instead of the volume resistors 47b and 47a in the embodiment of FIG. That is, as shown in (a), one terminal 57 of the three-terminal volume resistor 57 is used.
a is connected to the output terminal V01 of the stabilizing circuit 43, and the other two terminals 57b and 57c are connected to the changeover terminal B of the changeover switch 48b. Further, as shown in (b), the two terminals 58a and 58c of the three-terminal volume resistor 58 are
It is connected to the output terminal V02 of the stabilizing circuit 44, and the remaining one terminal 58b is connected to the changeover terminal A of the changeover switch 48a. The volume resistors 57 and 58 can be changed together. Others are substantially the same as those in FIG. 1 and are denoted by the same reference numerals.

When the volume knob for changing the resistance values Rv3 and Rv4 of the volume resistors 57 and 58 is rotated in the clockwise direction, the terminals 57c and 58c both descend and the resistance value R
v3 becomes large and the resistance value Rv4 becomes small. When it is rotated counterclockwise, both terminals 57c and 58c rise, the resistance value Rv3 becomes small, and the resistance value Rv4 becomes large. For this reason, the knob rotates clockwise Rv3-large Vf-rise illumination drive voltage-rise illumination brightness-up Rv4-small Vm-fall motor drive voltage-fall scan speed-down In this case, both increase the exposure amount Counterclockwise rotation Rv3-Small Vf-Descent illumination drive voltage-Descent illumination brightness-Down Rv4-Large Vm-Increase motor drive voltage-Increase scanning speed-Up In this case, the exposure amount decreases and the exposure amount decreases. Can be adjusted.

In the examples shown in FIGS. 1 and 2, the resistance values of the volume resistors 47a and 47b or the volume resistors 57 and 58 are changed by interlocking with one knob, but each knob is provided separately. You may change to.

In the embodiment shown in FIGS. 1 and 2, the driving voltage Vf
Although two volume resistors are used for adjusting Vm and Vm, the embodiment shown in FIG. 3 is configured to adjust the drive voltages Vf and Vm by one volume resistor. That is, the speed adjusting means 60A and the brightness adjusting means 6 of this embodiment.
In 0B, one volume resistor 67 is used instead of the volume resistors 47a and 47b of the speed adjusting unit 40A and the brightness adjusting unit 40B described in FIG. This volume resistor 67 is equivalent to the changeover switch 4 described above.
It is connected via two new changeover switches 48c and 48d which are interlocked with 8, 48a and 48b. The volume resistor 67 is a changeover switch 48c, 48.
It is connected between the common terminal C of d and the changeover switch 4
The switching terminals A of 8a and 48c and the switching terminals B of the switching switches 48b and 48d are connected. The switching terminal B of the switching switch 48c is the output terminal V01 of the stabilizing circuit 43, and the switching terminal A of the switching switch 48d is It is connected to the ground terminal.

Therefore, in the case of reflection type copying, when the terminals C and B of the changeover switches 48, 48a to 48d are in conduction, the volume resistor 67 acts to adjust the drive voltage Vf of the illuminating means 24. , And in the case of transmissive copying, the terminals C and A of the changeover switches 48, 48a to 48d.
When and are in conduction, the volume resistor 67 sets the motor 23
It serves to adjust the drive voltage Vm of the. Others are the same as those described in FIG.

As described above, the embodiment shown in FIGS.
In both cases, the exposure amount is adjusted by changing the voltages of the drive signals for the illumination and the motor.

Next, the speed and brightness adjusting means 7 shown in FIG.
0 is for adjusting the exposure amount by changing the duty of the drive signal of the illumination and the motor. To the control circuit 42, a switch for adjusting the exposure amount, which is the adjusting means 70, is connected. The changeover switch 48 connects the terminals C and B so that the illuminating means 24 is turned on in the case of reflection type copying, and the terminals C and A so as to turn off the illuminating means 24 in the case of transmissive copying. Is switched to be conductive. The switch 70 is, for example, a five-contact switch and can select five positions. Position C is the position of correction 0, position A is corrected (-1), position B is corrected (-0.5), position D is corrected (+)
0.5) and position E is corrected (+1). The driving voltages Vf and Vm of the lighting and motor are kept constant by resistors R1 and R2 and resistors R3 and R4.

Now, when the changeover switch 48 is changed over to the reflection type copying so that the terminals C and B are conductive and the switch 70 is in the state where the common terminal and the position C are connected, it takes about 2 minutes. It is assumed that the illumination means 24 and the motor 23 are driven by the pulse having the duty of 1 to obtain an appropriate exposure amount. At this time, the output signal I1 from the control circuit 42 to the common terminal C of the changeover switch 48 is L, and the stabilizing circuit 43 is supplied with power from the power source E and a voltage appears at the output terminal V01. This state is shown in FIG.
, The signal P1 is a pulse signal with a duty of 1/2, and when the output is H, an output is generated in the stabilizing circuit 43, and when the output is L, no output is generated, so that the illumination means 24 is intermittently turned on. Become. The signal P2 is a pulse signal with a duty of 1/2, and the signal P3 is always the output L. As described above, when the output of the signals P2 and P3 is H and L, the motor rotates in the forward direction, when the signal is L and H, the motor rotates in the reverse direction, and when it is L and L, the motor stops.
When the signal P2 is output H, an output is generated in the stabilizing circuit 44 to cause the motor 23 to rotate normally, and when the signal P2 is output L, no output is generated, so the motor 23 is stopped and intermittently driven.

Next, the switch 70 is moved to the positions D, E (+
When the correction mode is selected, the output signal P from the control circuit 42 is output.
Since the duty of 1 is made large (the solid line in the right half of the waveform chart of P1) and the brightness of the illumination means 24 is increased, the exposure amount is increased. On the contrary, switch 70 to position B, A
When it is switched to (-correction), the duty of the output signal P1 from the control circuit 42 is made small (the dotted line in the right half of the waveform diagram of P1) and the brightness of the illumination means 24 is lowered, so that the exposure amount is lowered. At this time, the duty of the output signal P2 does not change, the motor 23 maintains a constant rotation speed, and the optical means 15 has a constant scanning speed, so that the exposure time is constant.

Now, when the changeover switch 48 is changed over to the transmissive type copy so that the terminals C and A are conductive and the switch 70 is in the state where the common terminal and the position C are connected, FIG. As shown in (b), the output signal I1 from the control circuit 42 to the common terminal C of the changeover switch 48
Becomes H and the signal P1 becomes L, so that the stabilization circuit 43
No voltage appears at the output terminal V01 of the illuminator 24 and the illuminating means 24 is turned off. Instead, the original image 1 is illuminated with a constant brightness by turning on the illumination by the light box 35. Similar to the above case, a pulse signal having a duty of ½ and an output L from the signal P3 are generated from the signal P2.

Then, the switch 70 is set to the position D,
When the mode is switched to E (+ correction), the duty of the output signal P2 from the control circuit 42 is made small (solid line in the right half of the waveform diagram of P2), so that the rotation speed of the motor 23 decreases and the scanning speed of the optical means 15 decreases. Exposure becomes longer, the exposure time becomes longer, and the exposure amount increases. On the contrary, when the switch 70 is switched to the positions B and A (-correction), the duty of the output signal P2 from the control circuit 42 is made large (the dotted line in the right half of the waveform diagram of P2). Is increased, the scanning speed of the optical means 15 is increased, the exposure time is shortened, and the exposure amount is decreased.

In any of the above cases, when the motor 23 is rotated in the reverse direction, the output of the signal P2 is always set to L and the signal P2 is set to L.
The output of 3 may be used as a pulse signal and its duty may be changed in the same manner as above.

Needless to say, the number of switching stages of the switch 70 is not limited to five, and the scanning speed may be changed by changing the drive frequency of the motor using a step motor. Further, an A / D converter may be used instead of the switch 70, the input voltage to the A / D converter may be changed, and the same control as described above may be performed by the digital signal of the A / D converter. Also the signal P2,
As described above, P3 selects only forward / reverse rotation of the motor 23, and outputs a pulse signal having a different duty to the fourth signal and supplies it to the stabilizing circuit 44 to supply power to the motor. May be turned on and off.
Further, the adjustment of the exposure amount in the case of reflection type copying may be performed by changing the scanning speed or changing both the brightness and the scanning speed, in addition to the adjustment by the brightness.

In each of the above embodiments, an optical or magnetic switch may be used as the changeover switch. For example, in FIG. 1, the mechanical changeover switch 4
Instead of 8, an optical switch (photosensor) consisting of a photodiode, CdS, etc. is provided on the bottom surface of this device shown in FIGS. 6 and 7, and when this device is placed on a light box and turned on, the optical switch is turned on. Switch detects it,
Upon receipt of the detection signal, the control circuit 42 may determine that the copy is a transmission type copy (that is, the same as when the terminals C and A of the changeover switch 48 in FIG. 1 are connected). In this case, the changeover switches 48a and 48b (in the case of FIG. 3, further 48c and 48d) are connected to the control circuit 4
An electronic switch such as an analog switch controlled by 2 may be used, and this may be interlocked with the optical switch as in the case of FIG. The scanning speed may be adjusted according to the intensity of the transmitted light detected by the optical switch (photo sensor). Also, when using a light box designed as an option for this device, use a magnetic switch such as a Hall element for the changeover switch, and place a magnet at the position corresponding to the position of the Hall element in the light box. Good.

[0044]

As described above, the instant photocopier of the present invention selects either transmissive copy or reflective copy by the selection means. When the transparent type is selected,
Since the exposure amount can be easily adjusted by adjusting the exposure time based on the adjustment of the scanning speed of the optical means in the main body and the constant brightness of the illumination provided outside, the adjusting means of the brightness of the external illumination is unnecessary, Can be done easily. Further, when the reflection type is selected, the adjustment becomes easy if the exposure amount is adjusted by adjusting the brightness of the illumination means in the main body and the constant exposure time based on the constant scanning speed of the optical means. Therefore, it is possible to copy a high quality image by always adjusting the exposure amount to an appropriate value.

[Brief description of drawings]

FIG. 1 is a block diagram of a drive circuit showing an embodiment of the present invention.

FIG. 2 is a block diagram of a drive circuit showing a part of another embodiment of the present invention.

FIG. 3 is a block diagram of a drive circuit showing still another embodiment of the present invention.

FIG. 4 is a drive circuit block diagram showing a further embodiment of the present invention.

FIG. 5 is a waveform diagram of the output signal of the control circuit in the above.

FIG. 6 is a sectional view showing a schematic configuration of an instant photocopier according to an embodiment of the present invention.

[Fig. 7] Same as above, partially cutaway plan view

[Explanation of symbols]

1 subject 9 Instant photographic photosensitive material 9c Photosensitive surface 15 Optical means 23 Drive means 24 Lighting means 40A, 50A, 60A speed adjusting means 40B, 50B, 60B brightness adjusting means 48 means of selection 70 Speed and brightness adjustment means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroaki Ishida             Chiba Prefecture Yotsukaido City Shikado 934-13 Stock Association             Shaseikosha Chiba Office (72) Inventor Tadahiko Yamaoka             4-1-1 Taihei 4-chome, Sumida-ku, Tokyo             Inside the company building

Claims (4)

[Claims] 1. An illuminating means for illuminating a subject, an optical means for forming an image of a small area of the subject on a photosensitive surface of an instant photographic photosensitive material, a driving means for scanning the optical means in parallel with the subject, and the illuminating device. Selection means for selecting reflection type copying in which means is turned on for copying and transmissive copying for turning on and lighting an externally provided light source, and the transmission type copying is selected by the selecting means. An instant photocopier, characterized in that it has speed adjusting means for adjusting the scanning speed of the driving means. 2. The instant photocopier according to claim 1, wherein the speed adjusting means changes a voltage of a drive signal supplied to the driving means. 3. The instant photocopier according to claim 1, wherein the speed adjusting means changes a duty of a drive signal supplied to the drive means. 4. Illuminating means for illuminating an object, optical means for focusing a small area of the object on a photosensitive surface of an instant photographic photosensitive material, driving means for scanning the optical means in parallel with the object, and the illuminating device. Selection means for selecting reflection type copying in which the means is turned on for copying and transmission type copying for turning on and lighting an externally provided lighting device, and the reflection type copying is selected by the selecting means. In this case, there is provided brightness adjusting means for adjusting the brightness of the illuminating means, and speed adjusting means for adjusting the scanning speed of the driving means when the transmissive copy is selected by the selecting means. Instant photocopier.