JPH0715238Y2 - Manual printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a manual printing apparatus for printing image data written in a memory by manually scanning the apparatus body on a recording paper, for example.

[Prior Art and its Problems] Recently, as a small portable printer capable of printing on any paper regardless of the size of the recording paper, the main body of the apparatus is manually moved to obtain sub-scanning for printing. Something is being considered. The printing method of this type of printer is generally a thermal transfer method using an ink ribbon, and the force of moving the apparatus main body is used to wind up the ink ribbon that contacts the print head.

However, for example, when the required print width is wide and the width of the ink ribbon is wide, friction between the ink ribbon, the print head, and the recording paper increases, and it becomes difficult to move the apparatus main body.

[Object of the Invention] The present invention has been made in view of the above problems, and provides a manual printing device capable of smoothly winding an ink ribbon regardless of the slow moving speed of the housing. With the goal.

[Points of the Invention] That is, the manual printing apparatus according to the present invention, as a result of comparison between the motor rotation speed detected by the motor rotation speed detection means and the housing movement speed detected by the housing movement speed detection means, When the moving speed of the housing becomes faster than the rotating speed of the motor, the rotating speed of the motor is increased so that the rotating speed of the motor becomes faster, and the moving speed of the housing is higher than the rotating speed of the motor. The point is that the rotation speed of the motor is controlled so that the rotation speed of the motor becomes slower when the rotation speed becomes slower.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings.

The compact copying machine of this embodiment has an external appearance as shown in FIGS. 1 and 2, and 1 in the figure is a machine body having a vertically long box shape that can be held by a hand. An operation start switch 2 is provided at the center of the front surface of the apparatus main body 1, and an enlarged print designation key 3, a reset / clear key 4, and a reading width designation switch 5 are provided on the upper end side and the lower end side. On the back of the device body 1, a mode changeover switch 6 that also serves as a power switch, a power ON LED (light emitting diode) 7a, and a memory remaining amount indicator that lights up when the memory remaining amount falls below a predetermined amount LED 7b for driving and a LED 7c for speed warning which is turned on when the moving scanning speed of the apparatus body 1 is too fast are provided. Further, a print density adjusting knob 8 is provided on one side surface of the apparatus body 1.

The structure of this small-sized copying machine will be described. As shown in FIG. 3, this small-sized copying machine includes a front case block A and a rear case block B which form the main body 1 of the apparatus.
It comprises a chassis block C provided in the apparatus main body 1.

The front case block A will be described. The front case block A is, as shown in FIGS. 1 and 3, a front case that constitutes the front side of the apparatus main body 1.
The operation start switch 2, the enlarged print designation key 3, the reset / clear key 4 and the read width designation switch 5 are provided on the front surface of the la 1a, and the print density adjusting knob 8 is provided on one side of the front case 1a. . The operation start switch 2 is turned on by pressing a large area switch button 2a provided on the surface of the front case 1a. The enlargement print designation key 3 and the reset / clear key 4 are turned on by pressing the key buttons 3a and 4a fitted to the front case 1a so as to be able to be pushed. On the other hand, the reading width designation switch 5 is a slide switch. This reading width designation switch 5 is used for the front case 1a.
The slide operation knob 5a is provided on the surface of the device so as to be slidable in the lateral direction. Also, in FIG. 3, 12
Is a control unit provided in the front case 1a. The control unit 12 is configured by mounting a plurality of LSI chips (not shown) on a circuit board 12a, and the switches and the keys 2 to 5 are connected to the control circuit unit 12 by lead wires (not shown). Although not shown, the print density adjusting knob 8 is provided on the circuit board 12a.
Is attached to the print density adjusting knob, and one side of the print density adjusting knob 8 is a front case 1a.
Is projected to the side of. Also, 14a is the front case 1
The first main paper-contact roller 14a is provided at the lower end of the a so as to be close to one side thereof. The first main paper-contact roller 14a has its lower part slightly protruding below the front case 1a. It is rotatably supported by the case 1a. Further, at the lower end of the front case 1a, a horizontal projecting plate 15 is formed to project inwardly.On the projecting plate 15, a horizontally long LCE array 16 for illuminating the document surface and a copying apparatus for manuscript or external recording are provided. A paper surface detection switch 17 for detecting this when placed on paper is provided. This paper surface detection switch 17 is a micro switch equipped with an operation pin, and is normally pressed by a spring force so as to project below the front case 1a. When the copying apparatus is placed on an original document or an external recording paper, the paper surface is detected. It comes in contact with and is pushed up and turned on.

On the other hand, the rear case block B is, as shown in FIGS. 2 and 3, a rear case that constitutes the back side of the apparatus main body 1.
1b has a mode selector switch 6 which also serves as a power switch,
Each for power ON display, memory remaining display and speed warning
LEDs 7a, 7b, 7c are provided. The mode changeover switch 6 is a slide switch. The mode changeover switch 6 comprises a slide operation knob 6a provided on the surface of the rear case 1b so as to be slidable in the lateral direction. This operation knob 6a slides to the P position (print mode switching position), R position (reading mode switching position), OFF position, and E position (ejection position of the ink ribbon cassette 70) shown in FIG. When the operating knob 6a is in the OFF position, the mode selector switch 6 is in a state where the power is turned off.
Turn on the power when a is slid to the print mode switching position P or the reading mode switching position R.
At the same time, the copying machine is switched to the print mode or the read mode. The mode changeover switch 6 is connected to the control unit 12 of the front case block A by a lead wire (not shown). Reference numeral 18 is an auxiliary roller unit provided at the lower end of the rear case block B. The auxiliary roller unit 18 includes a pair of left and right auxiliary paper contact rollers 18a and 18b mounted on an elevating plate 19 which is vertically slidable in the rear case 1b. It is attached to a horizontal roller shaft 20 having both ends supported on both sides of the plate 19. The auxiliary roller unit 18 is adapted to be moved up and down in conjunction with the sliding operation of the operation knob 6a of the mode changeover switch 6. That is, 21 is a pair of left and right cam grooves formed in the up-and-down lift plate 19, and each of these cam grooves 21 forms a lower-stage side horizontal groove portion 21a and an upper-stage side horizontal groove portion 21b having a height difference on both ends thereof, An inclined groove portion 21c connecting the horizontal groove portions 21a and 21b is formed in the center portion, and a vertical groove portion 21d rising upward is formed at the end of the upper horizontal groove portion 21b. A pair of cam groove engaging pins 22 fixed to the operation knob 6a are slidably engaged with the respective cam grooves 21. The cam groove engaging pin 22 slides in the cam groove 21 by the sliding movement of the operation knob 6a. The cam groove engaging pin 22 is such that the operation knob 6a of the mode changeover switch 6 is at the print mode switching position. When it is in P, it is located in the lower horizontal groove portion 21a of the cam groove 21, and when the operation knob 6a is moved to the reading mode switching position R, it is in the inclined groove portion.
When moving the operating knob 6a to the OFF position while lowering the elevating plate 19 through 21c and moving the operation knob 6a to the OFF position, it moves to the middle of the upper horizontal groove portion 21b and further moves the operation knob 6a. When it is moved to the eject position E, it moves to the end of the upper horizontal groove 21b, that is, below the vertical groove 21d. That is, the auxiliary roller unit 1
8 is raised when the mode changeover switch 6 is changed over to the print mode changeover position P, and is lowered when the mode changeover switch 6 is changed over to the read mode changeover position R. In the mode, the lower ends of the auxiliary paper-contact rollers 18a, 18b are located below the rear case 1b at a position where they are projected to substantially the same level as the lower end of the first main paper-contact roller 14a. It comes to a position where it projects below the first main paper-contact roller 14a. Although the auxiliary roller unit 18 is at the same level as in the reading mode when the mode selector switch 6 is switched to the OFF position and the eject position E, the eject position E
, The cam groove engagement pin 22 will move the vertical groove part of the cam groove 21.
Since it comes to a state where it comes down to 21d and can enter this vertical groove portion 21d, in this state, the auxiliary roller unit 18 can be further lowered. At this time, the auxiliary roller unit 18 is pulled down and returned to its original position manually.

Next, the chassis block C will be described. The chassis block C is housed in the main body 1 of the apparatus that is configured by combining the front case block A and the rear case block B. The chassis block C has the following configuration. That is, in FIG. 3, reference numeral 23 denotes a chassis vertically installed in the apparatus main body 1 along one side surface thereof. At the lower end of the chassis 23, a second main paper-contact roller 14b is rotatably mounted. It is supported. The second main paper-contact roller 14b forms a pair with the first main paper-contact roller 14a provided in the front case block A, and the second main paper-contact roller 14b is the first main paper-contact roller 14a.
It is installed at the same level as the
Two main contact rollers 14a, 14b and rear case block B
The document or recording paper is contacted via four auxiliary paper contact rollers 18a, 18b and four paper contact rollers to scan and move on the paper surface. Reference numeral 24 denotes a scanning movement amount detecting main encoder unit provided on the outer surface of the lower end side of the chassis 23. The main encoder unit 24 detects the scanning movement amount of the apparatus main body 1 by the rotation of the second main paper-contact roller 14b. The main encoder unit 24 is rotatable on a support shaft 25 fixed to the chassis 23. A rotating disk supported by a shaft
26 and a rotation amount detector that detects the rotation amount of the rotating disk 26.
The rotary disk 26 is provided with a large number of slits 26a all over the circumference of the rotary disk 26 at regular intervals. Further, the rotation amount detector 27 is a U-shaped one that covers the outer peripheral portion of the rotating disc 26 from both sides thereof,
In the rotation amount detector 27, a light emitting element such as a light emitting diode and a light receiving element (not shown) such as a phototransistor are provided so as to face each other with the rotating disk 26 in between. The rotation amount detector 27 is fixed to the chassis 23. The rotating disk 26 is rotated by the rotation of the second main paper-contact roller 14b via the rotation transmission belt 28. That is, the main encoder unit 24 detects the amount of rotation of the rotary disk 26 rotated by the rotation of the second main paper-contact roller 14b, that is, the amount of scanning movement of the apparatus body 1 by the rotation amount detector 27. The quantity detector 27 outputs a pulse signal when the light from the light emitting element passes through the slit 26a of the rotating disk 26 and is received by the light receiving element. Reference numeral 30 is a print head unit attached to the lower end side of the chassis 23. The print head unit 30 includes a head support frame 31, a thermal print head 32, and a pair of left and right pressing springs (coil springs) 33 that press the print head 32 downward. The head support frame 31 is a print head.
The head is composed of a vertical back plate part 31a facing the back surface of 32, a horizontal top plate part 31b projecting forward from its upper edge, and a vertical end plate part 31c formed at the tip of these heads. The support frame 31 is cantilevered with its base end fixed to the chassis 23. In addition, the pair of push springs 33
Are assumed to have the same spring force.
Is the top plate 31b of the head support frame 31 and the print head 3
The print head 32 is pressed downward by being interposed between the print head 32 and the upper end surface of the print head 32. 38 is a driver insertion hole 38 provided in the rear case 1b so as to face a head inclination adjusting screw (not shown)
The adjustment of the head tilt angle is performed from the outside of the apparatus main body 1 by inserting a driver through the driver insertion hole 38 and turning the screw. The adjustment of the head tilt angle is performed with the ink ribbon cassette 70 pulled out from the apparatus main body 1.

On the other hand, 39 is an ink ribbon take-up unit for taking up the ink ribbon 81 of the ink ribbon cassette 70 loaded in the apparatus main body 1 in accordance with the printing operation. This ink ribbon take-up unit 39 takes up the ink ribbon cassette 70. The ink ribbon take-up shaft 40 for rotating the side spool 73 in the take-up direction and the drive motor 41 for the ink ribbon take-up shaft 40. The ink ribbon take-up shaft 40 is fitted and engaged with the take-up spool 73 of the ink ribbon cassette 70. The ink ribbon take-up shaft 40 has the base end of its central shaft as the above chassis.
It is rotatably supported by a cantilever 23 and is horizontally supported by the chassis 23. Further, the take-up shaft drive motor 41 is positioned above the ink ribbon take-up shaft 40 and is fixed in a motor housing portion 42 formed in the chassis 23.
Penetrates the chassis 23 and is projected to the outer surface thereof.
At the tip of the motor shaft 41a, the take-up shaft drive gear 4
3 is fixed, and this drive gear 43 is meshed with a passive gear 46 fixed to the shaft end of the ink ribbon take-up shaft 40 via a first intermediate gear 44 and a second intermediate gear 45 axially supported by the chassis 23. ing. Further, 47 is the rotational speed of the ink ribbon winding shaft 40, that is, the ink ribbon, from the rotation speed of the winding shaft drive motor 41.
A motor rotation detection encoder unit (hereinafter referred to as a motor encoder unit) provided for the purpose of detecting the winding speed of 81.
Is composed of a rotary disk 48 having a slit 48a at one location on the outer periphery fixed to the motor shaft 41a, and a rotation detector 49 fixed to the chassis 23. The rotation detector 49 is
The main encoder unit 24 for detecting the scanning movement amount described above
Similarly to the rotation amount detector 27 of FIG. 1, a light emitting element and a light receiving element (neither of which are shown) are provided so as to face each other with a rotating disc 49 interposed therebetween. Disk 48
Outputs a pulse signal every one rotation, that is, when the light from the light emitting element passes through the slit 48a of the rotating disk 48 and is received by the light receiving element. Further, 50 is a supply side spool engagement shaft that is fitted and engaged with the supply side spool 74 of the ink ribbon cassette 70, and this spool engagement shaft 50 is horizontally provided below the ink ribbon take-up shaft 40. The spool engagement shaft 50 is a hollow shaft having a spool engagement ridge formed along the outer circumference along the axial direction, and is rotated and axially moved by a fixed shaft (not shown) supported by the chassis 23 in a cantilever manner. It is slidably fitted.

Further, 54 is a reading unit for reading an image on the document surface, and this reading unit 54 is also attached to the chassis 23. In this reading unit 54, 55 is the chassis 23
Is a horizontally long base that is attached so as to project forward from the motor housing 42, and a horizontally long reading circuit board 56 is provided on this base 55, and the lower surface of this circuit board 56 is A one-dimensional image sensor 57 such as CCD is attached with the light receiving surface facing downward. The image sensor 57 is attached along the length direction of the circuit board 56 so that the direction of the pixel column is orthogonal to the scanning movement direction of the apparatus main body 1. A lens tube 59 is attached to the lower surface of the base 55. Inside the lens tube 59, the reflected light from the document surface illuminated by the LED array 16 is imaged on the light receiving surface of the image sensor 57. An imaging lens 60 is provided. The reading unit circuit board 56 is slidably supported at both end portions of the substrate on the substrate support portions 55a formed to project at both ends of the base 55,
The image sensor is provided so as to be horizontally movable in the substrate width direction (direction orthogonal to the pixel column direction of the image sensor 57).
The position of the pixel row 57 is adjusted by laterally moving the circuit board 56 so that the pixel row is aligned with the optical axis of the imaging lens 60.

Further, reference numeral 65 denotes a power supply unit provided at the upper end of the chassis 23. The power supply unit 65 is configured by accommodating a battery in a battery accommodating portion 66 formed at the upper end of the chassis 23.

That is, the center block C is the second main paper-contact roller.
14b, a rotary disc 26, a rotation amount detector 27, and a main encoder unit 24 having a mechanism for transmitting the rotation of the second main paper-contact roller 14b to the rotary disc 26, a print head 32, and its pressing spring 33. And a print head unit 30 having a head tilt angle adjusting mechanism, an ink ribbon take-up shaft 40, an ink ribbon take-up unit 39 having a drive motor 41 and a motor encoder unit 47, and a supply side spool having a rotation braking mechanism. The engagement shaft 50, the image sensor 57, the imaging lens 60, the reading unit 54 having a position adjusting mechanism for the image sensor 57, and the power supply unit 65 are all provided in the chassis.
It is provided in 23.

Then, the copying apparatus sets the sensor block C to the second position.
The main paper contact roller 14b is the first on the front case block A side.
The main paper-contact roller 14a is positioned so that it is at the same level as the main paper-contact roller 14a, and is housed in the rear case 1b.
The front case block A is joined to and the rear case 1b and the front case 1a are fitted together to assemble.

Next, an ink ribbon cassette used in the above copying machine
Describing 70, reference numeral 71 is a vertically long box-shaped cassette case whose lower end surface is open. The cassette case 71 has a height that can be accommodated between the lower end of the device body 1 and the motor housing portion 42, and is also the device body 1. The thickness is set so as not to block the reading field of the image sensor 57 on the inner side of the rear case 1b. A vertical cutout 72 for allowing the print head unit 30 of the apparatus main body 1 to enter the cassette case 71 is formed on one side surface of the cassette case 71. In the cassette case 71, a take-up spool 73 and a supply spool 74, which are fitted to the ink ribbon take-up shaft 40 and the supply-side spool engagement shaft 50 of the apparatus main body 1, at the upper end side and the intermediate portion thereof, respectively. And are installed horizontally. Both spools 73, 74 are arranged along the inner peripheral surface in the axial direction, and the ink ribbon take-up shaft 40 and the supply side spool engagement shaft 50 are provided.
The hollow shaft is formed with an engaging groove that meshes with the spool engaging ridge. A pair of ribbon guide shafts 79a and 79b are horizontally provided on the front and rear edges of the lower end open portion of the cassette case 71. The thermal transfer ink ribbon 81 wound around the supply side spool 74 is the ribbon guide shaft 79.
It is guided by a and 79b, passed through the open portion at the lower end of the case, and wound around the winding side spool 73.

On the other hand, as shown in FIG. 3, a cassette loading port 1c formed by cutting out the side faces of the front case 1a and the rear case 1b is opened on the side surface of the apparatus main body 1, and the cassette loading port 1c is opened at this cassette loading port 1c. Is provided with an opening / closing lid 1d. The opening / closing lid 1d has one side edge pivotally supported by a hinge portion 68 on a side edge portion of the cassette loading port 1c on the front case 1a side.
It is attached to the front case 1a so that it can be opened and closed. Further, a hook member 69a for locking the opening / closing lid 1d in a closed state is provided on the inner surface of the other side edge portion of the opening / closing lid 1d, and the side edge portion of the cassette loading port 1c on the rear case 1b side is provided. ,
A lock protrusion 69b for hooking the hook member 69a is provided in a protruding manner. The hook member 69a is a lock knob (not shown) provided on the outer surface of the opening / closing lid 1d so as to be vertically slidable.
It is moved up and down by the slide operation of, and when the lock knob is slid downward with the open / close lid 1d closed,
When the hook member 69a engages the lock protrusion 69b from above to lock the opening / closing lid 1d, and when the lock knob is slid upward, the hook member 69a disengages above the locking protrusion 69b to lock the opening / closing lid 1d. It will be canceled.

Then, the ink ribbon cassette 70 has the opening / closing lid 1d.
Is opened and inserted into the apparatus main body 1 from the cassette loading port 1c. In the ink ribbon cassette 70, the cutout 72 is aligned with the print head unit 30 in the apparatus main body 1 from the side surface side where the cutout 72 is formed, and the spool 73 on the take-up side is provided.
And the exposed end of the supply side spool 74 is inserted so as to face the ink ribbon take-up shaft 40 and the supply side spool engagement shaft 50 in the apparatus main body 1. When the ink ribbon cassette 70 is inserted into the apparatus main body 1, The print head unit 30 enters the cassette case 71 through the cutout 72, and the tip of the print head 32 faces the ink ribbon portion exposed at the open portion at the lower end of the cassette from above, and also the ink ribbon. Winding shaft 40 and supply side spool engagement shaft
50 engages with the take-up spool 73 and the supply spool 74 of the ink ribbon cassette 70, respectively. The ink ribbon cassette 70 loaded in the apparatus main body 1 is received at the rear side by the opening / closing lid 1d by closing the opening / closing lid 1d of the cassette loading port 1c and locking the opening / closing lid 1d to the loading position. Retained. In addition, the ink ribbon cassette 70 is loaded into the apparatus main body 1 after the operation knob 6a of the mode changeover switch 6 is switched to the eject position E.
It may be performed after the auxiliary roller unit 18 is pulled down. In this way, the auxiliary paper contact roller 18a on the cassette loading port 1c side of the apparatus body 1 does not interfere with the loading of the cassette. This is the same when the ink ribbon cassette 70 is pulled out from the inside of the apparatus main body 1. The auxiliary roller unit 18 is pulled down by pulling the roller shaft 20 downward by hand, and the operation knob of the mode changeover switch 6 is operated.
When 6a is switched to the eject position E, the cam groove engaging pin 22 that moves together with the operation knob 6a comes under the vertical groove portion 21d of the cam groove 21 of the elevating plate 19, so that the auxiliary roller unit 18 can be pulled down. .

Next, the circuit board 12 of the control unit 12 in FIG.
About the structure of the electronic circuit formed around a
It will be described with reference to the drawings. The main encoder unit 24 is composed of the rotating disk 26, the rotation amount detector 27, etc. as described above, and the pulse signal corresponding to the movement amount of the apparatus main body 1,
That is, the movement amount detection signal and the forward / reverse rotation detection signal of the rotating disk 26 corresponding to the moving direction of the apparatus body 1 are output. The movement amount detection signal output from the main encoder unit 24 is supplied to the control unit 101 and the timing signal generation unit 10.
2, sent to the speed detector 103 and the motor drive controller 104.
Further, the forward / reverse rotation detection signal is sent to the control unit 101, the timing signal generation unit 102, and the motor drive control unit 104. The control unit 101 includes the operation start switch 2, the enlarged print designation key 3, the reset / clear key 4, the reading width designation switch 5, the mode changeover switch 6, the print density adjustment knob 8 and the like shown in FIGS. 1 and 2. Keys and switches 10
An operation signal is given from 5 and a temperature sensor 10 for detecting the temperature of the thermal print head 32 and the temperature of the recording paper b.
A temperature detection signal is given from 6. Further, the control unit 101
Although not shown, a power supply voltage detector is provided inside. Then, the control unit 101 controls the lighting of the power-on display LED 7a, the memory remaining amount display LED 7b, the speed warning LED 7c in the LED unit 107 according to the operation signal from the key and the switch 107, and the control operation of each other unit. At the same time, the operation command R,
Give P. In this case, the control unit 101 controls the operation command R in the read mode and the operation command P in the print mode.
To the timing signal generator 102.

When the operation command R is given from the control unit 101, the timing signal generation unit 102 generates a CCD exposure timing signal of a constant cycle and the main encoder unit 24
Various timing signals such as a predetermined number of read timing signals A, serial / parallel conversion signals B, and clock pulses C are generated in synchronization with the movement amount detection signal given by Further, the timing signal generation unit 102, when the operation command P is given from the control unit 101, is synchronized with the movement amount detection signal only when the forward rotation detection signal is given from the main encoder unit 24 and is synchronized with the print timing signal. To occur. The CCD exposure timing signal output from the timing signal generator 102 is the one-dimensional image sensor 57.
The read timing signal A is sent to the A / D converter 109, and the serial / parallel converted signal B is sent to the serial / parallel converter 110.
Then, the clock pulse C is sent to the address counter 111 and the read width memory address control unit 112, respectively.
The one-dimensional image sensor 57 detects the reflected light from the document a.
It reads in synchronization with the CCD exposure timing signal and outputs it to the A / D converter 109 via the amplifier 108. This A / D conversion unit 109 is
The input signal is converted into a black and white binary signal by the read timing signal A and output to the serial / parallel conversion unit 110. The serial / parallel converter 110 converts the input signal into a parallel signal in units of, for example, 8 bits by the serial / parallel conversion signal B, and outputs the parallel signal to the image data memory 114 via the data selector 113. The data line of the data selector 113 is connected to the control unit 101, and one of the serial / parallel conversion unit 110 and the control unit 101 is selected by a select signal D from the control unit 101. The write address (row and column address) of the image data memory 114 is indicated by the read width memory address control unit 112 and designated by the address counter 111. Here, the read width memory address control unit 112 is supplied with read width address data based on the operation of the read width designating switch 5 in FIG. 1 from the control unit 101, and an address counter is provided with the number of addresses corresponding to the designated read width. The write specified address by 111 is incremented. That is, only the image data between the point O on the width scale drawn along the read width designating switch 5 and the scale including the operation knob 5a is written and stored in the image data memory 114. Further, the read address of the image data memory 114 is also given from the control unit 101 via the address counter 111. In this case as well, based on the number of read width addresses set in the read width memory address control unit 112,
The read address for one line of printing is specified.

Then, when the reading of the original document is completed and then the mode is switched to the print mode, the control unit 101 outputs the operation command P to the timing signal generation unit 102 as described above, and the movement amount from the main encoder unit 24. The data stored in the image data memory 114 is sequentially read out via the data selector 113 according to the detection signal. When the controller 101 reads the image data from the image data memory 114, it sets the energization time based on the head temperature from the temperature sensor 106, the detection data of the power supply voltage detector, and the print density adjustment, that is, the value of 8. Thermal head drive circuit 115 as print data
Output to. When the print data is sent from the control unit 101, the thermal head drive circuit 115 drives the thermal print head 32 in synchronization with the timing signal from the timing signal generation unit 102. Here, the motor drive control unit 104 causes the main encoder unit 24 to send the device main body 1
By supplying an appropriate motor drive pulse signal to the take-up shaft drive motor 41 based on the movement amount detection signal, the ink ribbon 81 fed from the supply side spool 74 of the ink ribbon cassette 70 in FIG. While being in contact with 32, it is wound around the spool 73 on the winding side. In this case, the rotation of the take-up shaft drive motor 41 is detected by the motor encoder unit 47, and the take-up speed of the ink ribbon 81 becomes a speed that matches the movement amount of the apparatus main body 1 based on the detection signal of the motor encoder unit 47. Thus, the motor drive control unit 104 controls the torque of the winding shaft drive motor 41. When the reverse rotation detection signal is applied from the main encoder unit 24, the drive pulse for the winding shaft drive motor 41 is not output and the ink ribbon 81 is not wound.

FIG. 5 shows the internal configuration of the motor drive control unit 104. The print operation command P from the control unit 101, the main encoder pulse from the main encoder unit 24, and the forward / reverse rotation detection signal in FIG. , And gate
Input via AND1. The AND gate AND1 is turned ON in synchronization with the main encoder pulse in the state where the print operation command P is given.
The output signal from is input to the set terminal S of the flip-flop FF1 and the AND gate AND2 which is turned on in the reset state of the flip-flop FF1 and counts up the first counter CT1. Flip-flop FF1 above
Is a reset-priority flip-flop, which always holds the reset state when the flip-flop FF2 is set by the motor encoder pulse from the motor encoder unit 41. The Q output from the flip-flop FF1 is input to an AND gate AND3 that counts up the second counter CT2 by the input of the clock pulse φ, and the selector 116 that switches the input of the count data from the first counter CT1 or the second counter CT2. Given. This selector 116 selects the second counter CT2 side when the flip-flop FF1 is set, and selects the first counter CT1 side when the flip-flop FF1 is reset.
The count data selected and extracted by the selector 116 is sent to the table 117.

Here, the first counter CT1 loads the count data (Loa
Repeat d) / Reset. That is, the second counter CT2 counts the lock pulse φ before the generation of the motor encoder pulse, and the first counter CT1
Is for counting the number of main encoder pulses in the motor encoder pulse generation interval.
7 sets 5-bit digital data S _{0 to} S ₄ (00000 to 11111) for controlling the motor torque according to the count data given through the selector 116, and outputs it to the D / A converter 118. The D / A conversion unit 118 includes resistors R _{0 to} R ₉ , r _{1 to} r ₃ , comparators A ₁ and A ₂ , and a transistor Tr, and torque control digital data S _{0 to} S given from the table 117. A voltage signal having a value corresponding to ₄ is given to the winding shaft drive motor 41.

That is, when the count data obtained from the selector 116 in the table 117 is large, the digital data S _{0 to} S ₄ for torque control also becomes large, so that the D / A conversion unit 118 outputs the digital data S _{0 to} S ₄ described above. A larger motor drive voltage V is generated, and a smaller digital data S _{0 to} S ₄ is generated a lower motor drive voltage. That is, when the motor encoder pulse is generated at a relatively fast time interval, a small torque control data (S _{0 to} S ₄ ) is set, the motor drive voltage is controlled to decrease, and a relatively long time is required. When motor encoder pulses are generated at intervals, large torque control data (S _{0 to} S ₄ ) is set, and the motor drive voltage is controlled to increase.

Next, the operation of the compact copying machine having the above configuration will be described. When reading information such as characters and images recorded on a document, first, the mode selector switch 6 is switched from the OFF position to the reading mode selector position R. When the mode selector switch 6 is switched to the reading mode switching position R, the power is turned on and the control unit 101 enters the reading mode. At this time, the control unit 101 lights the power-on display LED 7a in the LED unit 107 to indicate that the power is turned on, and at the same time, outputs the operation command R to the timing signal generation unit 10.
Give to two. At this time, the cam groove engaging pin 22 shown in FIG.
Moves to the start end of the upper horizontal groove portion 21b of the cam groove 21, the auxiliary roller unit 18 is lowered, and the auxiliary paper-contact rollers 18a, 18b.
Project below the main paper contact rollers 14a, 14b. Then, in this state, the user turns on the operation start switch 2 provided on the front surface of the apparatus main body 1 to
The main paper contact rollers 14a, 14b and the auxiliary paper contact rollers 18a, 18b are placed in contact with the surface of the original a. Thus, when the apparatus main body 1 is placed on the document a, the paper surface detection switch 17 comes into contact with the surface of the document a and turns on, and control is performed by turning on both the paper surface detection switch 17 and the operation start switch 2. The section 101 enters the read operation state and the LED array 16 is turned on. This is also the case when printing is performed, which will be described later, and in this case as well, the control unit 101 enters the print operation state when both the paper surface detection switch 17 and the operation start switch 2 are turned on. After that, the apparatus main body 1 is placed on the original a, and is moved forward along the surface of the original a (in the front direction of the apparatus main body 1).
When the scanning movement is manually performed, the projection light from the LED array 16 irradiates the surface a of the document, and the reflected light is incident on the one-dimensional image sensor 57 via the imaging lens 60. On the other hand, the original a
Among the paper contacting rollers that come into contact with the surface and rotate as the apparatus body 1 moves, the rotation disk 26 of the main encoder unit 24 rotates by the rotation of the second paper contacting roller 14b. The rotation of the rotary disk 26 causes the rotation amount detector 27 to move to the apparatus main body 1
A pulse signal is output according to the movement amount of the. That is, the pulse signal output from the rotation amount detector 27 becomes the output of the main encoder unit 24 in FIG. 4, and the control unit 101, as the movement amount detection signal for the copying apparatus main body 1,
It is sent to the timing signal generator 102, the speed detector 103, and the motor drive controller 104. In this case, the main encoder unit 24 outputs the normal rotation detection signal to the control unit 101, the timing signal generation unit 102, and the motor drive control unit 104.

On the other hand, when the timing signal generator 102 receives a read operation command R from the controller 101, the timing signal generator 102 generates a CCD exposure timing signal of a constant cycle and supplies the CCD exposure timing signal to the one-dimensional image sensor 57 and the movement supplied from the main encoder unit 24. A read timing signal A and a serial / parallel conversion signal B are generated according to the amount detection signal and output to the A / D conversion unit 109 and the serial / parallel conversion unit 110, respectively.
Here, the timing signal generator 102 outputs the clock pulse C
Is generated and output to the address counter 111 and the read width memory address control unit 112.

Therefore, the one-dimensional image sensor 57 outputs a signal corresponding to the reflected light from the surface a of the original, that is, an image signal, in synchronization with the CCD exposure timing signal from the timing signal generator 102. The output signal of the one-dimensional image sensor 57 is amplified by the amplifier 108 and sent to the A / D conversion unit 109. The A / D conversion unit 109 converts the image signal sent through the amplifier 108 into a serial digital signal in synchronization with the read timing signal A from the timing signal generation unit 102, and the serial / parallel conversion unit 110. Output to. The serial / parallel converter 110 converts the serial input signal into parallel image data, for example, every 8 bits in synchronization with the serial / parallel converted signal B sent from the timing signal generator 102, and sends it to the data selector 113. Output. When the reading mode is designated, the data selector 113 is switched to the serial / parallel conversion unit 110 side by the select signal D from the control unit 101. Therefore, the image data output from the serial / parallel converter 110 is sent to the image data memory 114 via the data selector 113. The write address of the image data memory 114 is designated by the count output of the address counter 111. This address counter 11
1 is a clock pulse C from the timing signal generator 102
By this, the digit address is sequentially incremented by "+1", and the address of the image data memory 114 is designated. Then, when one line of image data is written in the image data memory 114, the timing signal generation unit 102 stops the generation of the timing signal and sends the next movement amount detection signal from the main encoder unit 24. Waits until. In this case, when the reading width of the original a is designated by the reading width designation switch 5 in advance, the address number data converted into the designated width is set in the reading width memory address control unit 112. Then, the address counter 111 matches the write address for one line with the address number data corresponding to the specified read width, and repeatedly addresses the image data memory 114. That is, among the image data read by the image sensor 57, only the image data between the zero point on the width scale in FIG. 1 and the scale including the operation knob 5a is written in the image data memory 114. Become. The same operation is repeated thereafter, and the image data read from the surface of the original a is sequentially written in the image data memory 114. After that, when the operation start switch 2 is turned off, the apparatus main body 1 is separated from the surface a of the document, and the paper surface detection switch 17 is turned off, a predetermined reading end processing operation is started.

Here, when the document a is read, since the auxiliary paper contact rollers 18a and 18b are projected below the main paper contact rollers 14a and 14b, the apparatus main body 1 is tilted slightly forward. It will be moved by scanning. Therefore, the tip of the print head 32 protruding to the lower surface of the apparatus and the ink ribbon 81 below it do not come into sliding contact with the surface of the document a, and the print head 32
And the stain on the surface of the document a by the ink ribbon 81 is prevented.

In the speed detecting unit 103, the moving speed of the apparatus body 1 is detected based on the pulse signal from the main encoder unit 24, and if the moving speed is too fast, the LED unit 107
The speed warning LED 7c is turned on to alert the user. This is the same when printing. In addition, the image data memory 114
When the remaining memory is low, LED 7b for displaying the remaining memory
Is lit, and it is notified that the remaining memory is low.

Next, the operation of printing out the image data read from the original a as described above will be described.
When printing out image data, the mode selector switch 6 is switched to the print mode selector position P. When the mode selector switch 6 is switched to the print mode selector position P, the control unit 101 enters the print mode, and the data selector 113 is switched to the control unit 101 side by the select signal D. At this time, the cam groove engagement pin 22 moves to the lower horizontal groove portion 21a of the cam groove 21 to raise the auxiliary roller unit 18, and the auxiliary paper contact rollers 18a and 18b have the same protrusion level as the main paper contact rollers 14a and 14b. Becomes In this state, the user inserts the copying machine body 1 into each of the paper contact rollers 14a, 14b and 18
Place a and 18b in contact with the outer recording paper b surface such as a notebook.
In this way, when the apparatus main body 1 is placed on the recording paper b, the paper surface detection switch 17 comes into contact with the recording paper b surface and turns on, and the print head 32 contacts the recording paper b surface via the ink ribbon 81. . In this case, the print head 32 compresses the pressing spring 33 by contact with the recording paper b, and the respective paper contact rollers 14a, 14b.
And 18a and 18b to the recording paper contact level, and push spring 3
The repulsive force of 3 presses and contacts the surface of the recording paper b. After that, when the operation start switch 2 is turned on and the copying apparatus main body 1 is scanned and moved forward along the surface of the recording paper b, the paper contact rollers are rotated as the apparatus main body 1 moves, Two
The rotation of the main paper-contact roller 14b is transmitted to the rotary disc 26 via the rotation transmission belt 28. Along with the rotation of the rotary disc 26, a movement amount detection signal corresponding to the movement speed of the apparatus main body 1 is taken out from the main encoder unit 24 as in the above reading.

When the movement amount detection signal and the normal rotation detection signal are output from the main encoder unit 24 by starting the forward movement of the apparatus body 1, the motor drive control unit 104 drives the winding shaft drive motor 41. As a result, the ink ribbon take-up shaft 40 is rotationally driven to rotate the take-up side spool 73 of the ink ribbon cassette 70 in the take-up direction, and the supply side spool.
The ink ribbon 81 fed from 74 passes through the heat generating portion of the thermal print head 32 and is wound up on the winding side spool 73. In this case, the rotation of the winding shaft drive motor 41 is detected by the motor encoder unit 47, and the motor drive control unit 10
Reference numeral 4 controls the torque of the winding shaft drive motor 41 so that the winding speed of the ink ribbon 81 matches the movement amount of the apparatus main body 1, that is, the printing speed, based on the motor encoder pulse given from the motor encoder unit 47. .
This motor torque control is performed every time the winding shaft drive motor 41 makes one rotation, in the motor drive control unit 104 in FIG. 5, the pulse signal cycle from the motor encoder unit 47 and the encoder pulse from the main encoder unit 24 are changed. When the number of encoder pulses given from the main encoder unit 24 during one rotation of the motor 41 is larger than a predetermined value (the moving speed of the apparatus main body 1 is higher than the ribbon winding speed). If too fast)
When the motor drive voltage V is increased to increase the ribbon winding speed, and the number of encoder pulses is less than a predetermined value (when the moving speed of the apparatus body 1 is slower than the ribbon winding speed), , The motor drive voltage V is lowered to reduce the ribbon winding speed. This is also the case when the ribbon winding diameter of the winding side spool 73 is increased and the load on the motor 41 is increased, and even when the ribbon winding speed is slowed due to the increase in the load on the motor 41. Since the number of encoder pulses during one rotation of the motor 41 becomes larger than the predetermined value, the torque of the motor 41 is automatically increased and the ribbon winding speed is also increased at this time.

FIG. 6 is a flowchart showing the torque control operation of the take-up shaft drive motor 41 associated with this printing operation, that is, the scanning movement of the apparatus main body 1 on the recording paper b side is started, and the main encoder unit 24 causes the main encoder to move. When the pulse is generated, the second counter CT2 of the motor drive control unit 104 in FIG. 5 counts up, and the count data by the second counter CT2 is given to the table 117 (steps S1 and S2). In this case, the second counter C
Count data by T2 is very small because it is scanning movement initially, the minimum torque control data corresponding to the small address value (S _O ~S ₄₎ is set. This allows D /
The A converter 118 outputs the minimum motor drive voltage required for winding the ink ribbon 81 to the winding shaft drive motor 41 (step S3). After this, the motor encoder unit 47
Until the motor encoder pulse corresponding to the first rotation of the winding shaft drive motor 41 is input, the second counter CT is sequentially
The count data of 2 is counted up, and the torque control data (S _{0 to} S ₄ ) according to the table 117 is gradually set to a large value (step 4, S5a). That is, until the take-up shaft drive motor 41 makes one revolution, torque control is performed in such a direction that the revolution becomes faster (steps S1 to S5a).

In this way, when the winding shaft drive motor 41 starts to rotate and the motor encoder pulse accompanying the one rotation of the motor is given, based on the count data by the first counter CT1,
Torque control data (S
₀ to S ₄₎ is set, the motor drive voltage to the winding shaft drive motor 41 is output (step S4 to S7). At this time, the count data of the first counter CT1 is reset when the data is loaded (step S8). Then, the first counter CT1 counts up in synchronization with the main encoder pulse until the next motor encoder pulse is output from the motor encoder unit 47 (steps S5b → S).
9, S10). That is, the number of main encoder pulses for one rotation cycle of the winding shaft drive motor 41 is set in the first counter CT1. Here, when the speed of scanning movement of the apparatus main body 1 is high, Many encoder pulses are counted by the time the motor encoder pulse is generated, and if it is slow, the encoder pulse is not counted so much.

After this, when the motor encoder pulse is input again,
From the first counter CT1, the encoder pulse count data according to the moving speed of the apparatus body 1 is output by the selector 116.
If the moving speed is fast, a high motor drive voltage is output by the large digital torque control data, and if it is slow, a low motor drive voltage is output by the small digital torque control data. As a result, the winding speed of the ink ribbon 81 is always automatically adjusted to an appropriate speed according to the moving speed of the apparatus body 1.

FIGS. 7 (A) and 7 (B) respectively show the motor drive voltage V for the digital torque control data S _{0 to} S ₄ set in the table 117 of the motor drive control unit 104. The D / A converter 118 is set to "R ₀ = R ₁ = R ₂ = R ₃ = R ₄
= R ₅ = 2R, R ₆ = R ₇ = R ₈ = R ₉ = R ”, the figure (B) shows“ R ₀ = R ₁ = R ₂ = R ₃ = R ₄ = 2R, R ₅ ＝ R ₆ ＝ R ₇ ＝ R ₈ ＝
The motor drive voltage characteristics when R ₉ = R ”are shown. That is, by changing the combination of the resistors R _{0 to} R ₉ of the D / A converter 118, it is possible to limit the generation region of the motor drive voltage.

That is, the take-up shaft drive motor 41 needs to constantly generate a minimum torque for rotating only the ink ribbon take-up shaft 40 due to friction loss in each machine portion, and therefore, for example, 0 to a predetermined voltage (lower order). It is not necessary to change the torque up to 70%). Therefore, as shown in FIG. 7 (A), if the torque control data S _{0 to} S ₄ (= 00000 to 11111) sequentially linearly change the motor drive voltage V (= 0 to 5), the resolution is lowered. However, as shown in FIG. 7 (B), if the resistors R _{0 to} R ₉ are set so that the winding shaft drive motor 41 obtains a voltage range that requires a torque change, the inclination becomes gentle. The resolution is improved.

On the other hand, the control unit 101 includes the main encoder unit 24
A one-line printing command is output to the timing signal generation unit 102 in response to the movement amount detection signal sent from the timing signal generation unit 102, and the timing signal generation unit 102 outputs a print timing signal to the thermal head drive circuit 115. In addition, the control unit 101,
The row and column addresses of the image data memory 114 are sequentially designated according to the movement amount detection signal from the main encoder unit 24, the image data stored in the image data memory 114 is read out through the data selector 113, and the thermal head is driven. It outputs to the circuit 115 line by line.

When the one-line print command is given, the control unit 101 performs thermal processing based on the number of black characters in the print data, the head temperature from the temperature sensor 106, the voltage detection signal of the power supply voltage detector, the adjustment value of the print density adjustment knob 8, and the like. The energization time for the print head 32 is set, and the image data read from the image data memory 114 is output to the thermal head drive circuit 115. The thermal head drive circuit 115 drives the thermal print head 32 according to the control data from the control unit 101 and the timing signal from the timing signal generation unit 102. By driving the thermal print head 32, the image data is thermally transferred onto the recording paper b via the ink ribbon 81. In this case, the ink ribbon take-up shaft 40 is rotated by the take-up shaft drive motor 41 along with the movement of the apparatus main body 1, the unused portion of the ink ribbon 81 is sent out from the supply side spool 74, and the thermal print head 32 is The used portion after being printed by is wound up on the winding side spool 73 in sequence. By moving the copying apparatus main body 1 as described above, the image data stored in the image data memory 114 is sequentially printed on the recording paper b.

The image data printed on the recording paper b is the original a.
It is printed with the same width as the reading width from
If the enlarged print is designated by the enlarged print designation key 3 in the figure, the image data can be enlarged to a predetermined ratio and printed. Further, by pressing the reset / clear key 4 after printing, the same image data can be printed repeatedly.

Therefore, according to the small-sized copying apparatus having the above-described configuration, by manually scanning the apparatus body 1, the image information on the document a can be read and printed on any recording paper b, and at the same time, the apparatus body 1 can be printed. Since the ink ribbon 81 is wound by the motor 41 whose rotation is controlled according to the moving speed, the ink ribbon 81 can be smoothly wound and wound regardless of the moving state of the apparatus main body 1, and no transfer error occurs. Image data can be printed.

[Advantage of the Invention] As described above, according to the present invention, as a result of comparison between the rotation speed of the motor detected by the motor rotation speed detection means and the movement speed of the housing detected by the housing movement speed detection means,
When the moving speed of the housing becomes faster than the rotating speed of the motor, the rotating speed of the motor is increased so that the rotating speed of the motor becomes faster, and the moving speed of the housing is higher than the rotating speed of the motor. When the speed becomes slower, the speed of rotation of the motor can be controlled so that the speed of rotation of the motor becomes slower. Therefore, the ink ribbon can be wound at a speed according to the moving speed of the housing regardless of the slow moving speed of the housing, and as a result, the ink ribbon can be smoothly wound. Can be provided.

[Brief description of drawings]

1 is a front view and a rear view, FIG. 3 is an exploded perspective view, and FIG. 4 is the above-mentioned. FIG. 5 is a block diagram showing the configuration of the entire electronic circuit of the small copying machine, FIG. 5 is a circuit diagram showing the internal configuration of the motor drive control unit of the small copying machine, and FIG. 6 is an ink ribbon accompanying the printing operation of the small copying machine. A flowchart showing the rotation control operation of the winding motor, and FIGS. 7 (A) and 7 (B) respectively show the case where the combined resistance value of the D / A converter is changed in the motor drive controller of FIG. It is a figure which compares and shows the motor drive voltage characteristic with respect to digital torque control data. 1 ... Device body, A ... Front case block, 1a ... Front case, B ... Rear case block, 1b ... Rear case, C ... Chassis block, 2 ... Operation start switch, 3
... Enlarged print designation key, 4 ... Reset / Clear key,
5 ... reading width designation switch, 6 ... mode selection switch,
7a ... LED for power ON, 7b ... LED for remaining memory amount, 7c ...
LED for speed warning, 8 ... Knob for adjusting print density, 12 ... Control unit, 12a ... Circuit board, 14a, 14b ... Main paper contact roller, 16 ...
LED array, 17 ... Paper surface detection switch, 18 ... Auxiliary roller unit, 18a, 18b ... Auxiliary paper contact roller, 19 ... Elevating plate, 21 ... Cam groove, 22 ... Cam groove engaging pin, 24 ... Main encoder unit, 26, 48 ... Rotating disk, 26a, 48a ... Slit, 27 ... Rotation amount detector, 28 ... Rotation transmission belt, 30 ... Print head unit, 32 ... Thermal print head, 33 ... Push spring, 39 ... Ink ribbon winding unit, 40 ... Ink ribbon take-up shaft, 41 ... Take-up shaft drive motor, 43, 44, 45, 46 ... Gear, 47 ... Motor encoder unit, 49 ... Rotation detector,
50 ... Supply side spool engagement shaft, 54 ... Reading unit, 56 ...
Reading unit circuit board, 57 ... One-dimensional image sensor, 60 ... Imaging lens, 61 ... Sensor position adjusting knob, 65 ... Power supply unit, 70 ... Ink ribbon cassette, 71 ... Cassette case,
73 ... Winding side spool, 74 ... Supply side spool, 81 ... Ink ribbon, 101 ... Control circuit, 102 ... Timing signal generating section,
103 ... Speed detection section, 104 ... Motor drive control section, 105 ... Key and switch, 106 ... Temperature sensor, 107 ... LED section, 108 ... Amplifier, 109 ... A / D conversion section, 110 ... Serial / parallel conversion section, 111 ... address counter, 112 ... read width memory address control unit, 113 ... data selector, 114 ... image data memory, 115 ... thermal head drive circuit, 116 ... selector,
117 ... table, 118 ... D / A converter, CT1 ... first counter,
CT2 ... second counter, a ... manuscript, b ... recording paper.

Claims (1)

[Scope of utility model registration request] 1. A housing, a housing moving speed detecting means for detecting a moving speed of the housing, a printing means for performing a printing operation according to the moving speed of the housing, and a printing operation of the printing means. Accordingly, an ink ribbon for transferring the ink to the print medium, a motor for winding the ink ribbon, a motor rotation speed detection means for detecting the rotation speed of the motor, and a rotation of the motor detected by the motor rotation speed detection means. As a result of comparing the speed and the moving speed of the housing detected by the housing moving speed detecting means, if the moving speed of the housing becomes faster than the rotating speed of the motor, the rotating speed of the motor becomes faster. When the rotation speed of the motor is increased and the movement speed of the housing becomes lower than the rotation speed of the motor, the rotation speed of the motor is decreased. Manual printing apparatus characterized by comprising control means for controlling the rotational speed, the.