JPS63135268A - Hand printer - Google Patents

Abstract

PURPOSE:To obtain a hand printer capable of providing a required printing position in response to a designated position signal by selecting a detection position signal from a detection part which detects a sliding-contact movement value. CONSTITUTION:After completion of a setting for printing, a hand printer 1 is further moved. Then a detection voltage value of this movement from a rotary encoder 5 is retrieved into CPU14 through an analog/digital converter 18, and is stored into ADDATN of a memory. After this, the voltage value of this ADDATN and that of ADAVE are compared and the timing when the voltage value of ADDATN is lower than that of ADAVE is determined. Following this, a single dot string of printing data stored in a printing buffer 16 is read and applied to a wire drive part of an ink dot head 8. A selected wire protrudes from a nose part 9, and ink is transferred from the tip of the wire for printing. This repeated sequential printing process completes printing of a single line. Consequently, overlapped printing can be performed by detection at random of the detection voltage value of the rotary encoder.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hand-type printer, and relates to a hand-type printer that has a high bi-resolution and can arbitrarily set the width of handwriting of printed characters.

(Prior art) The applicant of the patent application filed Japanese Patent Application No. 59-112357 (Japanese Unexamined Patent Publication No.
No. 255, No. 465), they have applied for a hand-type printer that prints by generating a print timing in synchronization with the sliding amount of contact between a print medium and a printing section of a hand-type printer.

(Problem that the invention attempts to solve) For printing characters, etc. with a hand-held printer.

It is built into the printing section and controls the amount of contact and sliding between the printing medium and the printing section.
Conventionally, the rotation amount of the rotary encoder with respect to the printing medium was detected, and printing was performed at a predetermined timing. Therefore, in order to perform half printing, etc. in which half of adjacent dots are overlapped, it is necessary to improve the resolution. The problem was that the cost was high.

(Means for solving problems) The present invention was made in view of the above problems.

In a hand-held printer comprising a printing section that slides in contact with a printing medium, and a detection section that detects the amount of sliding movement between the printing medium and the printing section, a detection position of the detection section that detects the amount of sliding movement. This paper proposes a handheld printer that selects and prints signals.

(Function) In the present invention, the hand type is capable of specifying a predetermined position signal of the detection position as the amount of contact and sliding of the print unit with the print medium, and determining the desired print position in response to the specified position signal. Suggest a printer.

(Example) An example of the present invention will be described with reference to the accompanying drawings. 1st
The figure is a partially cutaway cross-sectional view of a hand-held printer. Inside the hand-held printer 1 is a roller 3 that rotates in contact with paper as a printing medium.

2 so that the handheld printer 1 rotates in the direction of movement.
It is arranged. These two rollers 3 allow the hand-held printer 1 to move smoothly, and the length of the row 23 allows the direction of movement of the hand-held printer 1 to be determined. A detection roller 24 that rotates in contact with the paper 2 is rotatably arranged on the bottom surface of the gutter type printer 1, and the detection roller 4 has its circumferential surface in contact with an encoder roller 26 fixed to the shaft of the rotary encoder 5. being touched. The rotary encoder 5 generates a Sin signal in response to rotation. There is a push-pull type start switch on the top of the handheld printer 1. Further, an ink type dot head 8 is arranged inside the hand type printer 1, and this ink type dot head 8 is connected to a wire drive unit 11. A nose portion 9 on which the wire selected by the wire driving portion 11 slides and projects toward the paper 2 side.
It is composed of a cartridge 10 that impregnates and retains ink to be supplied to the wire in the nose portion 9. FIG. 2 shows an electrical block diagram for operating the handheld printer of the present invention. A print signal is applied from the host computer 12 to the interface 13 via a communication line, and is controlled by the CPU 14. This CPU 14 is a character generator 15. Print buffer 116. Work memo! 717,
It is connected to the X start switch 7 and the print selection switch 20.

The rotary encoder 5 is connected to the ink dot head 8 via an analog-to-digital converter 18 and the ink dot head 8 via a head drive circuit 19. Work memory 7
As shown in FIG. 5, the counter detects the voltage generated by the rotary encoder 5 through the analog-digital converter 1B, and stores the voltage decrease or increase, ADDIR, which stores the maximum value, and ADMAX, which stores the minimum value. ADMIN to store the current detected value, ADDATO to store the previous detected value, ADDATN to store the current detected value
, each area of ADAVE is allocated to store the average value of the maximum value (ADMAX) and the minimum value (ADMIN).

Next, the operation will be explained according to the flowchart shown in FIG. Host combination, - interface 1 from evening 12
The CPU 14 judges whether the input data is a line feed code or not (S2).

If it is print data, the data for half printing is stored in the print buffer 16 (S3), and it is determined whether the print buffer 116 is full (S4), and operations 81 to S4 are repeated until the print buffer 116 is full. I'll return it. When the data input in step 1 (sl) is a line feed code.

Alternatively, if the print buffer 16 becomes full in step 4 (S4), it is checked whether the start switch 7 is turned on (SS).

If the start switch 7 is off, check whether the start switch 7 is on again (SS) and repeat until the start switch 7 is turned on.

If the start switch 7 is turned on by the operator, the counter value in the work memory 17 is cleared to 0 (S6). Further, the value of ADDIR, which stores whether the current detected voltage value of the rotary encoder 5 is in the decreasing direction or increasing direction of the Sin signal, is set to 0.

If the value of this ADDIR is 0, the direction is increasing.

If it is 1, the direction is determined to be decreasing, so the initial value is set to be increasing (S7). The operator moves the handheld printer 1 by pressing it against the paper 2, and the detected voltage value of the rotary encoder 5 is imported into the CPU 14 via the analog-digital converter 18 (S8), and this imported voltage value is ADMAX which stores the maximum value of work memory 17
(S9), the minimum value of the work memory 17 is stored in ADMIN (5IO), and the previous voltage value is stored in ADDATO (S11). Furthermore, the detected voltage value of the rotary encoder 5 at the time when the hand-held printer moves is converted into an analog-to-digital converter 1.
Divide by 1, import it into the CPU (Si2), and compare the obtained voltage value with the voltage value stored in ADMAX.
), if the voltage value of ADDATH is larger than ADMAX, the voltage value of ADDATN is stored in ADMAX (S
15) If the voltage value of ADDATN is smaller than ADMAX, skip to step 16 (S16).

In step 16, the fC1 pressure value stored in ADDATN is compared with the voltage value stored in ADMIN, and
ADDATN if the voltage value of N is smaller than ADMIN
The voltage value of ADMIN is stored in ADMIN (S 17 ), and AD
If the voltage value of DATN is greater than ADMIN, skip to step 18 (81B). ADD, I
Since R is the initial value 0, step 18 (31
8) to step 19 (S19).

If the voltage value of DDATO is smaller than the voltage value of DDATO, it is determined that the detected voltage value of rotary encoder 5 is in the decreasing direction, and A
1 is stored in DD I R (S20). Next, add 1 to the value of color/ri (521) and judge whether the counter value is 10 in this case as one period of the sine curve (522), but since the counter value is still 1, ADD
The voltage value of ADDATN is stored in ATO (526), and the process returns to step 12. Now in step 19 ADDATN
If it is determined that the voltage value of is greater than ADDATO,
It is determined that the detected voltage value of the rotary encoder 5 continues to increase, and the process moves to step 26. Step 1
2 to 17, and if ADDIR is 1 in step 18, that is, it is in the decreasing direction, it is determined whether the voltage value of ADDATN is greater than the voltage value of ADDATO (524), and the voltage value of ADDAIN is If it is larger than the voltage value of ADDATO, it is determined that the voltage value detected by the rotary encoder 5 is in the increasing direction, and if AD is disconnected, it is determined that the voltage value detected by the 0-tally encoder 5 is still in the decreasing direction. Then, the process moves to step 26. By repeatedly processing the above steps 12 to 26, υ,
The maximum and minimum values of the detected voltage values of the rotary encoder 5 via the analog-to-digital converter 18 are set as pre-processing for the print start state, and in step 25, the ADMA
The average value of the voltage value of X and the voltage value of ADMIN is calculated and the result is stored in ADAVE.

Now that the settings required for printing have been completed, the process for selecting the printing position in step 27 will be explained. As the operator moves the hand-held printer 1 further, this movement is reflected by the detected voltage value of the rotary encoder 5 being input to the CPU 14 via the analog-to-digital converter 18 (
S27), ADDATNK storage L (S28).

This voltage value of ADDATN and ADDATN
If it is larger than the voltage value of t-pressure ME, the process returns to step 27, and the part where the voltage value of ADDATN becomes smaller than ADAVE is determined to be the part shown by ■ in FIG. 5 (529).
One dot string of print data stored in the print buffer 16 is read out and applied to the wire drive section of the ink dot head 8 via the head drive circuit 19 so that one selected wire protrudes beyond the nose portion 9. Ink is transferred from the tip of the wire to the paper and printed (S30). If there is no more data recorded in the print buffer 16, the process returns to the beginning of step 1 (S31). If print data recorded in the print buffer 16 remains, the AD
Store the voltage value of DATN in ADDATO32), and set the next detection voltage value of rotary encoder 5 to analog
Import via the digital converter 18 (S35),
The detected voltage value is stored in ADDATN of the work memory 17 (S54). Here, the voltage value of ADDATN is ADDA
If it is smaller than the voltage value of TO (S55).

Remember the voltage value of ADDATN in ADDATO. 5sq.
), return to step 33. ADDATN in step 35
If the voltage value of is larger than the voltage value of ADDATO, (S
35) If it is determined that the position of the ink dot head is at the position (■) in FIG. Read the print data and print 536) If the print selection switch is off (S52)
If this is standard printing, printing data for one dot row is only read from the print buffer 116 and no printing is performed (S53).
).

If there is no print data stored in the print buffer 16, the process returns to step 1 (838), and if print data remains in the print buffer 116, the detected voltage value of the rotary encoder 5 is converted into an analog-to-digital converter. 18 (S40). This fetched voltage value is stored in ADDATN (541).

When the voltage value of ADDATN is A, the voltage value of ADDATN is A.
If the voltage value is smaller than the voltage value of DAVE, the process returns to step 40. In step 42, the voltage value of ADD A T N is ADA.
If it is larger than the voltage value of VE, it is determined that the position is at the position (■) in FIG. 5, and print data for one dot row is read from the print buffer 116 and printed (845). If there is no more print data stored in the print buffer 16, the process returns to step 1 (S44); if there is print data left in the print buffer 16, the detection voltage value of the rotary encoder 5 is further changed to It is taken in via the digital converter 18 (S46). This captured voltage value is A
If the voltage value of ADDATN is larger than the voltage value of ADDATO, the voltage value of ADDATN is stored in ADDATO. (S51), and the process returns to step 46. In step a8, the ADDATNO voltage value is A, DDA
If it is determined that the voltage is smaller than the voltage value of TO, it is determined that the position is indicated by ■ in FIG. 549) If the print selection switch 20 is off (S
54) This is standard printing, which only reads one dot row's worth of print data from the print buffer 116 and does not print (
SSS). (5SO) to determine whether the print data in the print buffer 116 has run out.

If there is no more print data, return to step 1. If print data remains in the print buffer 116, the process returns to step 27, and printing is performed sequentially according to the next sine waveform of the rotary encoder 5. By repeating this sequential printing process, printing of 91 lines is completed. In this example.

Although the description has been made in the case where the rotary encoder 5 has one phase, the same processing can be performed even if the rotary encoder 5 has two or more phases. In addition, in the two embodiments, the maximum detection voltage of the rotary encoder 5,
Although the explanation has been made using the four points of minimum and average values, a memory area for a desired voltage value is provided in the work memory, and the print position can be set based on the voltage value stored and calculated in this memory area.

(Effects of the Invention) Since the present invention is configured as described above, overlapping printing can be performed by constantly detecting the detected voltage value of a rotary encoder disposed in a hand-held printer. Also,
(Since the resolution of the 1-tally encoder can be a normal resolution, it is also possible to reduce costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway cross-sectional view of a 2-way printer, FIG. 2 is an electrical block diagram, and FIG. 3 is an exploded view of a work memory. FIG. 4 is a flowchart, and FIG. 5 is a waveform diagram of the rotary encoder. DESCRIPTION OF SYMBOLS 1... Hand printer, 2... Paper, 4... Detection roller, 5... Rotary encoder, 6... Encoder roller, 8... Ink type dot head. 16...Print buffer, 17...Work memory.

Claims (1)

[Claims] In a hand-held printer comprising a printing section that slides in contact with a printing medium, and a detection section that detects the amount of sliding movement between the printing medium and the printing section, a detection position of the detection section that detects the amount of sliding movement. A handheld printer that prints by selecting signals.