JPH074938Y2 - Printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a printing apparatus capable of bidirectional printing scanning.

[Prior Art] Recently, a handy type printer which performs printing by manual scanning has been put into practical use.

Thus, conventionally, this type of printer applies a print head surface to a recording sheet and scans in a predetermined direction to
Printing is performed, and at the same time, the ink sheet is supplied to the print head according to the scanning speed.

By the way, in such a printer, the print scanning direction is previously determined to be one direction. For example, in a printer capable of scanning from left to right, only so-called left-justified printing can be performed. However, in practice, so-called right-justified printing may be required by scanning from the right to the left. In such a case, however, if the above-mentioned printer scans in the reverse direction, the ink sheet is wound up. Not only that, but the used ink sheet is ejected, and printing cannot be done at all.

[Problems to be Solved by the Invention] As described above, in the conventional apparatus, since the scanning direction for printing is previously determined to be one direction, there is a problem that the usable range is limited.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printer device for a printer capable of performing printing corresponding to bidirectional scanning and expanding the range of use.

[Means for Solving the Problems] The present invention provides a pair of paper-contact rollers corresponding to a pair of take-up reels supplied to a print head, and a printer between the take-up reels and the paper-contact rollers. When the main body is scanned in one direction, the rotation of one paper contact roller is transmitted to one take-up shaft, and when it is scanned in the opposite direction, the rotation of the other paper contact roller is transmitted to the other take-up shaft. A movable transmission mechanism is provided.

[Operation] According to the present invention, the rotation of the one paper-contact roller is transmitted to the one take-up shaft by scanning the printer body in one direction, and the ink sheet is supplied to the print head. , The rotation of the other paper-contact roller is transmitted to the other take-up shaft by scanning in the opposite direction, and the ink sheet is supplied to the print head. Therefore, it is possible to reliably perform scanning in any of these directions. You will be able to print.

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

FIG. 1 shows a block diagram of the embodiment. In the figure, 11 is a printer main body, and this printer main body 11 is a paper-contact roller integrated with a chassis 15 at the bottom of the side that contacts the recording paper 12.
13 and 14 are rotatably provided.

Gears 16 and 17 are concentrically fixed to the paper contact rollers 13 and 14, respectively. Further, the paper-contact rollers 13 and 14 are provided with coaxially rotatable one ends of L-shaped levers 18 and 19, respectively.
In this case, the paper contact rollers 13 and 14 and the L-shaped levers 18 and 19 corresponding thereto are coupled by a friction mechanism (not shown), and the L-shaped levers 18 and 19 are connected in the rotational direction of the paper contact rollers 13 and 14. Is rotatable. Where 20 and 21 are
This is a pin that regulates the rotation range of the L-shaped levers 18 and 19.

The L-shaped levers 18 and 19 have large-diameter gears 22 and 23 rotatably provided at their bent portions. The gears 22 and 23 are individually meshed with the gears 16 and 17 fixed to the paper contact rollers 13 and 14, respectively.

On the other hand, reference numerals 24 and 25 denote ink sheet take-up reels provided in the cassette mounting portion, which are arranged at a predetermined interval (interval between sheet take-up cores 28, 28 of the ink sheet cassette 27 described later). Here, the take-up reel 24 is a gear 24
1 and a reel shaft 242 connected to the gear 241 via a friction mechanism (not shown).
The gear 22 is meshed with the gear 241 in a state where 8 is rotated clockwise. The drawing shows this state. Similarly, the take-up reel 25 is composed of a gear 251 and a reel shaft 252, and the gear 23 is meshed with the gear 251 when the L-shaped lever 19 is rotated clockwise. And such ink sheet take-up reels 24, 25
The ink sheet cassette 26 is attached to the.

As shown in FIG. 2, the ink sheet cassette 26 has a pair of sheet winding cores 28, 28, and an ink sheet 29 is wound between the winding cores 28, 28. Further, the front surface of the ink sheet cassette 26 has a pair of protrusions 261 and 262, and the ink sheet 29 is led out from the protrusions 261 and 262. Further, a projection 30 for identifying the mounted state of the ink sheet cassette 26 is provided at one corner on the back surface of the ink sheet cassette 26.

Returning to FIG. 1, the mounting portion of the ink sheet cassette 26 is provided with switches 31 and 32 that respond to the protrusions 30. One of these switches 31 and 32 operates depending on the mounting direction of the ink sheet cassette 26. The illustrated example shows a state in which the switch 32 is operating.

An encoder 34 is attached to the paper contact roller 14 via an auxiliary roller 33.
Are connected. The encoder 34 has a pair of slit discs 341 and 342 as shown in FIG. Here, the slit disk 341 rotates together with the paper contact roller 14, and has a plurality of slits 341a formed along the peripheral edge portion at predetermined intervals. Further, the slit disc 342 is fixed and is arranged so as to overlap the slit disc 341, and two slits a and b are formed in the peripheral portions facing each other with the center point interposed therebetween. In this case, the slits a and b of the slit disc 342 are such that when the slit disc 341 rotates in the direction F in the figure, the slit 341a first coincides with the slit a,
When the slit 341a coincides with the slit b with a slight delay, and conversely, when the slit disk 341 rotates in the R direction in the drawing, the slit 341a first coincides with the slit b and the slit 341a coincides with the slit a with a slight delay. It is like this. The interrupters 343 and 344 are provided so as to correspond to the two slits a and b of the slit disk 342. Here, the interrupter 343 is composed of an LED 343a and a photo sensor 343b described later, and responds to light passing through the slit 341a of the slit disc 341 and the slit a of the slit disc 342, and similarly,
The interrupter 344 also includes an LED 344a and a photo sensor 34, which will be described later.
It is composed of 4b and is adapted to respond to light passing through the slit 341a of the slit disk 341 and the slit b of the slit disk 342.

In addition, 35 is a print head, and this print head 35 is a spring.
By 36, the pressing force at the time of printing is applied.

Next, FIG. 4 shows a circuit configuration of such a printer body.

In the figure, 41 is a key input section, and this key input section 41 is
In addition to the print data input keys (not shown), print instruction keys, etc., the "R / L" key for setting left-justified or right-justified when printing 4
Have 11. Then, key inputs such as print data and print instructions from the key input unit 41 are given to the control unit 42.

Further, the key input from the “R / L” key 411 of the key input unit 41 is given to the binary counter 43. The binary counter 43 specifies "0" for right-direction printing (left-justified) and "1" for left-direction printing (right-justified).
Given to 42. The control unit 42 is supplied with outputs a to d from an encoder 34, which will be described later, including outputs from the switches 31 and 32 of the cassette mounting unit.

The control unit 42 controls writing and reading of print data to and from the print RAM, and causes the work RAM 45 to store the start address and the end address of the print data written in the print RAM 44. When printing in the right direction (justified to the left), print RAM4
The start address of the print data written in 4 is written in the address latch 46, and the content of the U / D counter 47 is set to the up mode. On the other hand, in the case of left direction printing (right justification), the print RAM 44 While writing the start address of the print data written in the address latch 46, the U / D counter 4
Set the contents of 7 to down mode. And print RAM44
After the print data of (1) is latched in the latch 48, it is given to the print head (thermal head) 35 via the print drive circuit 49. Further, the key input data of the key input unit 41 and the print data of the print RAM 44 are given to the display RAM 50 and displayed on the display unit 52 via the display drive unit 51.

Reference numeral 53 is a feeling ROM for recording kanji data when creating print data.

Next, FIG. 5 shows a circuit configuration of the encoder 34.

In this case, each time the slit 341a of the slit disc 341 and the slit a of the slit disc 342 match, the light of the LED 343a is received by the photosensor 343b, and this output is taken as the signal a of FIG. 6 via the amplifier P1. Then, this signal a is given to the D terminal of the D-type flip-flop FF1 and to the CK terminal of the D-type flip-flop FF2, while the slit 341a of the slit disk 341 and the slit b of the slit disk 342 are matched. At the same time, the photo sensor 344b of the LED 344a receives the light, and the output is obtained as a signal b of FIG. 6 through the amplifier P2. I'm trying to give it to the CK pin. Then, from the Q terminal of the flip-flop FF1, the signal c shown in FIG.
The signal d shown in FIG. 6 is obtained from the terminal.

Next, the operation of the embodiment thus configured will be described.

First, in the case of left-justified printing, as shown in FIG. 7, the printer main body 11 is placed on the recording paper 12 and operated from the left corner of the recording paper 12 in the arrow direction. In this case, since the ink sheet cassette 26 shown in FIG. 2 is mounted on the take-up reels 24 and 25 in the state shown in FIG. 1, the switch 30 is operated by the protrusion 30. Also, in the key input section 41, operate the “R / L” key 411 to operate the binary counter.
Set the contents of 43 to "0". Then, press the "Print" key 41
Operate 2 to command printing. In this case, if the mounting direction of the ink cassette sheet 26 and the scanning direction instruction of the “R / L” key 411 do not match, that fact is displayed on the display unit 52.

In this state, when the printer body 11 is scanned in the direction of the arrow shown in FIG. 7, the paper contact rollers 13 and 14 rotate in the direction of the arrow shown in FIG. 2, and the L-shaped levers 18 and 19 are moved through the friction mechanism. Rotate clockwise. As a result, the gear 22 provided on the L-shaped lever 18 meshes with the gear 241 of the take-up reel 24. On the other hand, the L-shaped lever 19 is rotated until it comes into contact with the pin 21, and the gear 23 is separated from the gear 251 of the take-up reel 25. In this state, when the printer main body 11 is further scanned, the rotation of the paper contact roller 13 is transmitted to the reel shaft 242 from the gear 241 of the take-up reel 24 via the gear 22 and the ink sheet 29 of the ink sheet cassette 27. Are supplied to the print head 35 as the printer body 11 scans, and are wound up on the take-up reel 24.

On the other hand, in the control circuit shown in FIG. 4, the operation output of the switch 32 is given to the control unit 42. When the printer body 11 is scanned and the paper contact rollers 13 and 14 rotate, the paper contact roller 14
The encoder 34 is further rotated via the auxiliary roller 33, and the slit disc among the slit discs 341 and 342 shown in FIG.
341 rotates in the L direction, and encoder outputs a, b, c, d shown in period A of FIG. As a result, the control unit 42 writes the start address of the print data of the print RAM 44 into the address latch 46, and sets the U / D counter 47 to the up mode by the encoder output c.

In this state, the print data for the first line of the print RAM 44 is applied to the latch 48, and the print head 35 prints on the recording paper 12 via the print drive circuit 49. in this case,
Printing by the print head 35 is performed corresponding to the output a from the encoder 34. When printing of one line is completed, the address is incremented by +1 by the U / D counter 47, print data of the next one line is given to the latch 48, and printing is performed in the same manner as described above. After that, the print data is performed line by line up to the final address. Here, if the output d is given from the encoder 34 during such printing, error processing is performed.

Next, in the case of right-justified printing, as shown in FIG. 8, the printer body 11 is operated from the right corner portion of the recording paper 12 in the direction of the arrow shown. In this case, since the ink sheet cassette 26 shown in FIG. 2 is turned upside down and mounted on the take-up reels 24 and 25, the switch 31 is operated by the protrusion 30 this time. In the key input section 41, the “R / L” key 411 is operated to set the content of the binary counter 43 to “1”. Then, the "print" key 412 is operated to instruct the printing.

In this state, when the printer main body 11 is scanned in the direction of the arrow shown in FIG. 8, the paper contact rollers 13 and 14 rotate in the direction opposite to the arrow shown in FIG. 2, and the L-shaped lever 18, through the friction mechanism, 19 rotates counterclockwise. This gives L
The gear 23 provided on the die lever 19 is the gear 25 of the take-up reel 25.
Meshed with 1. On the other hand, the L-shaped lever 18 is rotated until it abuts the pin 20, and the gear 22 is separated from the gear 241 of the take-up reel 24. In this state, when the printer body 11 is further scanned, the rotation of the paper contact roller 14 is transmitted to the reel shaft 252 from the gear 251 of the take-up reel 25 via the gear 23, and the ink sheet 29 of the ink sheet cassette 27. Is the printer body
It is supplied to the print head 35 in accordance with the scanning of 11, and is wound on the take-up reel 25.

On the other hand, in the control circuit shown in FIG. 4, the operation output of the switch 31 is given to the control unit 42. When the printer body 11 is scanned and the paper contact rollers 13 and 14 rotate, the paper contact roller 14
The encoder 34 is further rotated via the auxiliary roller 33, and the slit disc among the slit discs 341 and 342 shown in FIG.
341 rotates in the R direction, and encoder outputs a, b, c, d shown in period B of FIG. 6 are given to the control unit 42. As a result, the control unit 42 writes the final address of the print data in the print RAM 44 into the address latch 46, and sets the U / D counter 47 to the down mode by the encoder output d.

In this state, the print data for one line at the final address of the print RAM 44 is given to the latch 48, and the print head 35 prints on the recording paper 12 via the print drive circuit 49. In this case, printing by the print head 35 is performed corresponding to the output b from the encoder 34. When printing of one line is completed, the U / D counter 47 counts down the address by +1 and the print data of the next one line is latched.
And is printed in the same manner as described above. Thereafter, the print data will be performed line by line up to the start address. Here, when the output c is given from the encoder 34 during such printing, error processing is performed.

In the case of leftward scanning, the address is incremented by +1 from the start address of the print data, as in the case of rightward scanning.
If you print it, the left and right target images (mirror image) shown in Fig. 9
Is obtained. By applying such printing to the back surface of the transparent sheet, it is possible to obtain printing that can be read as normal characters from the front surface.

[Advantage of the Invention] According to the present invention, a pair of paper contact rollers are provided corresponding to a pair of take-up reels supplied to the print head, and
Between the take-up reel and the paper contact roller, when the printer body is scanned in one direction, the rotation of one paper contact roller is transmitted to one take-up shaft, and when scanned in the opposite direction, the other paper contact roller is transferred. A swingable transmission mechanism for transmitting the rotation of the roller to the other winding shaft is provided. As a result, when the printer body is scanned in one direction, the rotation of one of the paper contact rollers is transmitted to the one take-up shaft, and the ink sheet is supplied to the print head as well as being scanned in the opposite direction. The rotation of the other paper-contact roller is transmitted to the other take-up shaft, and the ink sheet is supplied to the print head, so that it is possible to reliably perform right-justified printing as well as left-justified printing. This makes it possible to cope with the problem, and it is possible to remarkably expand the range of use as compared with the conventional one in which the print scanning direction is set to one direction.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, and FIG.
FIG. 4 is a front view showing an ink sheet cassette used in the same embodiment, FIG. 3 is a view for explaining an encoder used in the same embodiment, FIG. 4 is a block diagram showing a circuit configuration of the same embodiment, and FIG. FIG. 5 is a block diagram showing a circuit configuration of an encoder used in the embodiment, FIG. 6 is a diagram for explaining an output of the encoder, and FIGS. 7 to 9 are for explaining an operation of the embodiment. FIG. 11 …… Printer main body, 12 …… Recording paper, 13,14 …… Paper contact roller, 18,19 …… L-type lever, 22,23 …… Gear, 24,25
...... Take-up reel, 26 …… Ink sheet cassette, 29 ……
Ink sheet, 30 ... Protrusion, 31,32 ... Switch, 34 ...
… Encoder, 341, 342 …… Slit disk, 35 …… Print head, 41 …… Key input section, 42 …… Control section, 43 …… Binary counter, 44 …… Print RAM, 46 …… Address latch, 47 …… U / D counter, 49 …… Print drive circuit.

Claims (1)

[Scope of utility model registration request] 1. A printer main body, a print head provided in the printer main body, a pair of take-up reels for winding an ink sheet supplied to the print head, and a pair of rotary reels rotated by scanning on a recording paper. The paper contact rollers and the paper contact rollers and the take-up reel are separately interposed, and when the printer body is scanned in one direction, the rotation of one of the paper contact rollers is transmitted to the one take-up reel. A printing apparatus, comprising: a rotation transmission unit that transmits the rotation of the other paper-contact roller to the other take-up reel when the printer body is scanned in the other direction.