JPH01290482A - Printer - Google Patents

Abstract

PURPOSE:To ensure that the time for replacing regular replacement parts can be seen before an alarm and a paper can be prepared a little earlier by provid ing a non-volatile memory for storing the total number of sheets printed by a printer, and a display element for displaying a digit in a digit place set by a switch for displaying the digits of the total number on a digit place basis. CONSTITUTION:When a switch 1 is operated to set a printer into condition for displaying the total number of sheets printed and a switch 2 is operated to select a digit place of the total number, an LED 3 indicating the selected digit place is turned ON, and the digit in the selected digit place of the total number read from a non-volatile memory 7 is displayed on a display element 4 (for example, a 7-segment display element for displaying digits 0-9). A shift of display from a lower to a higher-order digit is made each time the switch 2 is depressed, and the display of the most significant digit is followed by the display of the least significant digit.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to printers.

[Conventional technology]

Conventionally, for example, in electrophotographic printers, maintenance parts had to be replaced every predetermined number of pages printed.
The total number of printed sheets is stored in non-volatile memory. To know the total number of pages printed, either print on the paper using test printing, or
Or, it was determined based on the printer's alarm information.

[Problem to be solved by the invention]

With the conventional printers mentioned above, when printing on paper for test printing to know the total number of pages printed, extra paper is required, and when using alarm information, an alarm occurs during printing. However, at that point, there was a drawback that printing would be interrupted until the periodic replacement part was replaced.

[Means to solve the problem]

The printer of the present invention includes a switch for displaying the total number of printed pages, a nonvolatile memory that stores the total number of printed pages, a switch for displaying the total number of printed pages, and a display for each digit of the number. It has a display element.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

Referring to Figures 1 and 2, when switch 1 puts the printer in the state of displaying the total number of prints, and switch 2 selects each digit of the total number of prints, the LED 3 indicating the selected digit lights up and the non-volatile The number corresponding to the selected digit of the total number of printed sheets read from the memory 7 is displayed on the display element 4 (for example, 0 to 9 in 7 segments).

Each time the switch 2 is pressed, it changes from the lower digit to the higher digit, and when it reaches the highest digit, it returns to the lowest digit.

〔Effect of the invention〕

As explained above, the present invention uses a switch for displaying the total number of printed sheets, a switch for displaying the total number of printed sheets, and a display element that displays the number, so that the total number of printed sheets of the printer can be displayed on paper. Since it is possible to know without printing, there is no need to use extra paper for test printing, and it is possible to change the replacement period of regularly replaced parts without waiting for an alarm condition, so you can prepare them early. Therefore, even if an alarm occurs while the printer is in use, it can be replaced immediately, which has the effect of increasing work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a processing flowchart of a control program showing one embodiment of the present invention. 1...Total number of printed sheets display status setting switch, 2
...Total number of printed sheets each digit selection switch, 3...
...LED, 4...Display element, 5...
Display element control circuit, 6... switch control circuit,
7...Nonvolatile memory control circuit. Agent Patent Attorney Uchihara Otokyo 1 Norikan 2 Diagram

Claims (1)

[Claims] In a printer that prints on sheets stacked and stored in a paper feed cassette, a non-volatile memory stores the total number of sheets printed by the printer, and the total number of sheets stored in the non-volatile memory is displayed for each digit. What is claimed is: 1. A printer comprising: a switch for setting the number of digits; and a display element for displaying the number of digits set by the switch.