JP2014034148A5 - - Google Patents

Description

The present invention, in order to solve the above problems, a plurality of wire pins, said wire pin comprises a print head having a plurality of driving elements for driving by an electromagnetic force, Ru said wire pin is selectively protruded by the drive element the printing operation in a printing apparatus for printing on a medium through the ink ribbon, before Symbol a protective action means for restricting the printing operation of the print head, before Symbol predetermined method the count value according to the driving history of each driver element And determining means for comparing the calculated count value with a predetermined threshold value to determine whether or not the protection operation means needs to be executed.

Reference numeral 3 denotes a storage unit as a storage unit of the printer 100, which stores a program executed by the control unit 1, various data used for it, processing results by the control unit 1, and the like, and temporarily stores received print data. Is done.
A character generator 4 is connected to the control unit 1 and the storage unit 3 and has a function of generating the excitation timing of each drive element D for each row based on the print data stored in the storage unit 3. doing.
5 is a drive circuit, driven by a command signal from the control unit 1, a drive circuit for the print head for driving the drive element D of the print head 6, the carriage scanning motor 7 for scanning the carriage 11 via a drive belt 13 A scanning motor driving circuit and a medium conveying driving circuit for driving the medium conveying motor 8 for rotating the platen 14 .
A temperature sensor 9 is built in the center of the print head 6 (see FIG. 4), and has a function of outputting the head temperature T, which is the internal temperature of the print head 6, to the control unit 1.

In FIG. 2, reference numeral 11 denotes a carriage on which the print head 6 is mounted. The carriage 11 is guided by a carriage shaft 12 installed in a direction orthogonal to the conveyance direction of the printing paper P as a medium, and is reciprocated by a carriage scanning motor 7. The print head 6 mounted on the carriage 11 is moved to the print position along the carriage shaft 12 by the drive belt 13 composed of an endless belt that is movably driven.
A platen 14 is disposed in parallel to the carriage shaft 12 so as to face the print head 6, receives a hit of the wire pin 6 a of the print head 6, and is rotated by the medium transport motor 8 to move the paper P in the transport direction. Transport.

First, a printing operation by the printer 100 of this embodiment will be described.
When the character generator 4 generates the excitation timing of each drive element D for one row based on the print data stored in the storage unit 3, the control unit 1 sends a command signal for driving the print head 6 to the drive circuit. As shown in FIG. 6, the drive circuit 5 drives the carriage scanning motor 7 according to the received command signal to move the print head 6 to a predetermined position and causes the wire pin 6a of the print head 6 to protrude. Print characters.

SA16: The control unit 1 that has determined that the protection operation of the print head 6 is necessary when the head temperature T is equal to or higher than the temperature threshold value performs a printing process in order to reduce the printing speed of the print head 6 from the normal case. In order to drive the print head 6 at the excitation timing of each drive element D generated by the carriage scanning motor 7 and the character generator 4 necessary for setting the mode to the printing speed reduction mode and performing printing in the printing speed reduction mode. The command signal is transmitted to the drive circuit 5 and the process proceeds to step SA18.

SA17: When the head temperature T is less than the temperature threshold value, the control operation of the printing unit 6 that has determined that printing is performed as usual since the protection operation of the print head 6 is unnecessary is set to the normal printing speed mode. A command signal for driving the print head 6 at the excitation timing of each drive element D generated by the carriage scanning motor 7 and the character generator 4 necessary for printing at the normal printing speed is set to the drive circuit 5. Transmit to step SA18.

SA18: The control unit 1 drives the carriage scanning motor 7 and the print head 6 by the drive circuit 5 in accordance with the command signal transmitted to the drive circuit 5 from any one of the steps SA16 and SA17, and performs predetermined printing of the line. At the end of printing the line, a line feed is performed to print the next line, and the process proceeds to step SA19.
SA19: The control unit 1, which has finished the line feed to the next line, adds “1” to the current line number j, increments the line number j (j = 2 at this stage), and prints the next line. Returning to step SA2, printing of a new line is repeated.
In this way, the printing process by the printer 100 of this embodiment is executed.

Hereinafter, the printer of this embodiment will be described with reference to FIGS. Note that parts similar to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
As shown in FIGS. 15 and 16, the printer 100 according to the present embodiment is provided with a gap lever 41 for changing the gap between the print head 6 and the platen 14, and the gap lever 41 is formed on the carriage shaft 12. The gap between the front end of the print head 6 and the platen 14 can be changed by operating the gap lever 41.

Subsequent processing operations in Steps SB8 to SB20 are the same as the processing operations in SA7 to SA19 in the first embodiment, and a description thereof will be omitted.
In this case, in step SB17 (corresponding to step SA16 in the first embodiment), the command signal transmitted to the drive circuit 5 is the carriage scanning motor 7 and the character generator 4 necessary for printing in the print speed reduction mode. A command signal for driving the print head 6 is transmitted at the excitation timing and the excitation time 5 of each drive element D generated in (1).

In step SB18 (corresponding to step SA17 in the first embodiment), the command signal transmitted to the drive circuit 5 is generated by the carriage scanning motor 7 and the character generator 4 necessary for printing at the normal printing speed. A command signal for driving the print head 6 at the excitation timing and excitation time 5 of each drive element D is transmitted.
In this way, the printing process is executed by the printer 100 that can change the gap between the print head 6 and the platen 14 in accordance with the medium type of this embodiment.

DESCRIPTION OF SYMBOLS 1 Control part 1a Count value calculation means 2 Personal computer 3 Memory | storage part 4 Character generator 5 Drive circuit 6 Print head 6a Wire pin 7 Carriage scanning motor 8 Medium conveyance motor 9 Temperature sensor 11 Carriage 12 Carriage shaft 13 Drive belt 14 Platen 16a Core 16b Bobbin 16c coil 18 base plate 19 first yoke 20 permanent magnet 21 second yoke 22 spacer 24 leaf spring 25 armature 27 armature yoke 28 guide frame 29 guide portion 31 space sheet 32 printed circuit board 33 heat sink 41 gap lever 42 gap sensor 43 scale plate 100 printer

Claims (8)

Printing a plurality of wire pins, said wire pin comprises a print head having a plurality of driving elements for driving by an electromagnetic force, the Ru printing operation is selectively projected by the wire pins the driving element, the medium through the ink ribbon a printing apparatus that performs,
And protection operation means for regulating the printing operation before Symbol print head,
Calculating a count value according to the driving history of previous SL respective driving element in a predetermined manner, by comparing the count value with a predetermined threshold value the calculated, judging means for judging whether or not the execution of the protection operation means A printing apparatus comprising: The printing apparatus according to claim 1,
The count value calculated by the predetermined method is a predetermined value for the number of times of driving of the drive element to be calculated and the number of times of driving peripheral elements of the drive element to be calculated while the print head performs predetermined printing. A printing apparatus having a count value obtained by adding a drive count multiplied by an influence coefficient. The printing apparatus according to claim 1,
The count value calculated by the predetermined method is a predetermined value for the number of times of driving of the drive element to be calculated and the number of times of driving peripheral elements of the drive element to be calculated while the print head performs predetermined printing. A printing apparatus, characterized in that a count value is obtained by multiplying the sum of the number of driving times multiplied by an influence coefficient and a correction coefficient for correcting a change in excitation time of the drive element due to a change in the gap between the print head and the platen. The printing apparatus according to claim 2 or 3,
The printing apparatus according to claim 1, wherein the influence coefficient is set so as to decrease as a distance between the drive element to be calculated and the peripheral element increases. The printing apparatus according to any one of claims 1 to 4,
Temperature detecting means for detecting the internal temperature of the print head;
And a means for setting a start set value of the counter value of each driving element in accordance with the internal temperature detected by the temperature detecting means. The printing apparatus according to any one of claims 1 to 5,
Storage means for storing the calculated count value;
The count value stored in the storage means is a count value obtained by adding the calculated count value to the count value periodically calculated based on the head temperature of the print head already stored in the storage means. Characteristic printing device. The printing apparatus according to any one of claims 1 to 6,
The printing apparatus according to claim 1, wherein the protection operation unit pauses the printing operation or reduces a printing speed of the printing operation. In a control method of a print head, which has a plurality of wire pins and a plurality of drive elements that drive the wire pins by electromagnetic force, and prints on a medium by selectively projecting the wire pins by the drive elements,
Protection that regulates a printing operation to protect each of the drive elements by calculating a count value related to the drive history of each of the drive elements by a predetermined method and comparing the calculated count value with a predetermined threshold value A method for controlling a print head, comprising: determining whether or not an operation needs to be performed.

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