JPS62286781A - Impact type printer - Google Patents

Abstract

PURPOSE:To prevent the burnout of a printing head due to the rising in the temp. of said printing head, by a method wherein printing is continued when the printing number of times of at least one printing pin within a definite time are smaller than the max.continuous printable number of times of the printing pin to room temp. and printing is temporarily stopped when the former becomes larger than the latter. CONSTITUTION:Room temp. is detected by a room temp. detection means 2. A means 3 storing the max. continuous printable number of times of a printing pin to room temp. stores the max. continuous printable number of times of the printing pin to each room temp. A printing operation stop time memory means 4 stores the temporary stop time of printing operation to each room temp. The printing number of times of each pin within a definite time are counted by the printing number-of-time count means 5 of each pin of the printing head and, when the count reaches the max. number of times, the control circuit 1 of a printer stops the printing of the printer and the time stored in the printing operation stop time memory means 4 is read and printing is stopped for said time. During the temporary stop time, the coil of the printing pin used in printing over the max. continuous printable number of times is cooled sufficiently.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an impact printer.

C. Prior Art] This type of impact printer has a temperature sensor installed at the bottom of the print head, and depending on the temperature value of the print head, the printer can temporarily stop printing or print in one direction. It had become.

[Problem that the invention seeks to solve]
□In the conventional impact printers mentioned above, the temperature sensor of the print head is located at the bottom of the print head, so the printing accuracy at a distance from the temperature sensor is not transmitted, and the printer either temporarily stops printing or prints in one direction. The disadvantage is that the coil of the printing pin located far from the temperature sensor will burn out and the printing pin will become unusable.

[Means for solving problems]

The impact printer of the present invention includes a control circuit for controlling the printer, a means for detecting the room temperature, a means for storing the maximum number of consecutive prints that can be made by the printing pin with respect to the room temperature, and a means for storing the time for stopping the printing operation of the printer. and means for counting the number of times each pin of the print head prints within a certain period of time;
The maximum number of times the printing pin can print continuously with respect to the room temperature;
means for comparing the number of times of printing by each pin of the print head within the certain period of time, comparing the number of times of printing of at least one printing pin within the certain period of time with the maximum number of times that the printing pin can perform continuous printing with respect to room temperature; If the number of times a single printing pin prints within a certain period of time is less than the maximum number of times the printing pin can print continuously at room temperature, the number of consecutive prints increases.
A control circuit that controls the printer reads the time at which printing operation of the printer is stopped, and prints during the said time.
It is configured to stop.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

2 is a room temperature detection means for detecting room temperature. 3 is a means for storing the maximum number of times that the printing pin can perform continuous printing for each room temperature, and stores the maximum number of times that the printing pin can perform continuous printing for each room temperature. Reference numeral 4 denotes a printing/operation stop time storage means that stores the print operation pause time for each room temperature. 5 is means for counting the number of times of printing for each pin of the print head;
Count how many times each pin prints in a certain period of time. Reference numeral 6 is a number comparing means, which compares the number of times stored in 3 with the number counted in 5. 1 is a control circuit of the printer.

First, 2 detects room temperature. For example, if the temperature is 20°C, 1 is read as :l:, which is the maximum number of consecutive prints possible at 20°C. Let's say it's 5ooo times. 1 causes the printer to print, and 5 starts counting the number of prints within a certain period of time. 6 compares the number of times stored in 3 and the number counted in 5. 5 counted times ai: 5o
When it reaches oo times, 1 stops printing the printer, reads the time stored in 4, and stops printing for the darkness of that time.

The maximum number of continuous printing times is 5000 times at room temperature 20
This is the number of consecutive printings when the temperature rise of the printing pin coil in °C reaches the limit value. If this number of times is exceeded, the temperature rise of the coil will exceed the limit, and the temperature of the printing pin coil will be
The coil of the printing pin will burn out as it reaches the burnout temperature.
The printing pin becomes unusable. In order to prevent this number of times from being exceeded, there is a means for counting the number of times of printing for each printing pin, and the number of times of continuous printing is constantly compared with the maximum number of times that can be printed continuously. When this maximum possible number of continuous printing is reached, printing will be temporarily stopped, and this pause time is determined by the room temperature.
The temporary stop time is read from the print operation temporary stop time storage means for each room temperature, and the printer control circuit temporarily stops printing for the read time value. This temporary stop time is a time for the coil of the printing pin that has printed the maximum number of consecutive printings to be sufficiently cooled. After this time has elapsed, the printer control circuit starts printing again and repeats the above operation.

〔Effect of the invention〕

As explained above, the present invention detects the room temperature, limits the number of times of printing, and temporarily stops printing, thereby preventing the temperature of the printing head from rising to the point where the print head burns out. It has the effect of preventing damage to reputation. Another advantage is that there is no need to provide a temperature detection means in the print head. Furthermore, there is an effect that the same printing operation as that of a print head that is equipped with a temperature detection means for the print head, which normally has the same number of print pins, can be performed simply by detecting the room temperature.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Telinta control circuit, 2...Room temperature detection means, 3...Maximum number of continuous printing possible times of the printing pin with respect to room temperature storage means, 4... Printing operation temporary stop time storage means, 5...Number of printing for each pin of the print head $ 1 Figure

Claims (1)

[Claims] In an impact printer, a control circuit for controlling the printer, a means for detecting room temperature, a means for storing the maximum number of times a printing pin can print continuously with respect to the room temperature, and a means for storing a time for temporarily stopping the printing operation of the printer. , means for counting the number of times each pin of the print head can print within a certain period of time, and means for comparing the maximum number of times that each pin of the print head can perform continuous printing for the room temperature with the number of times that each pin of the print head can print within the certain period of time; The number of times of printing of at least one printing pin within a certain period of time is compared with the maximum number of continuous printing possible of the printing pin relative to room temperature, and the number of printings of at least one printing pin within a certain period of time is If the number of consecutive prints is less than the maximum possible number of consecutive prints, printing continues; if the number is greater than the maximum number of consecutive prints possible, a control circuit controlling the printer reads a time to stop the printing operation of the printer and stops printing for the said time. Impact printer.