JPH02307777A - Printer - Google Patents

Abstract

PURPOSE:To minimize the power consumption of a power supply battery to a required limit with the automatic cutoff of a power supply when no printing paper is loaded and no printing data is available by providing a switch and a monitoring circuit. CONSTITUTION:If paper is set in a printer, a paper detection switch 2 is turned ON and therefore, a controller detects that the paper detection switch 2 has been turned ON and a power supply switch 4 is turned ON. A power supply 8 is connected to all circuits and the printer is set in a standby state for the arrival of printing data. If the data arrives, it is entered into a printing buffer, and a signal 7 continues to be connected as far as the presence of data is monitored in the printing buffer by a printing buffer monitoring circuit 3. In addition, the controller 1 maintains a power supply for the printer in a switch-on state as far as the signal 7 is connected, if the switch 2 is turned OFF Consequently, the power supply switch 4 continues to be kept in a switch-on state. Thus printing data is no longer lost, if the paper supply runs out halfway through printing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer, and particularly to a printer equipped with a power supply disconnecting means.

[Conventional technology]

Conventionally, printers that operate using storage batteries or the like have current flowing through their internal circuits while the power switch is on, even in a standby state other than printing.

[Problem to be solved by the invention]

The above-mentioned conventional printer has the disadvantage that the storage battery and the like are consumed even though the printer does not print.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer that can minimize the consumption of a storage battery used as a power source.

[Failure to solve the problem]

The printer of the present invention includes a print paper detection switch that detects the presence or absence of print paper, a print buffer monitoring circuit that monitors whether the print buffer is empty, and a power supply that uses the output of the print paper detection switch and the output of the print buffer monitoring circuit. The controller is configured to include a controller that controls connection and disconnection.

〔Example〕

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

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

As shown in FIG. 1, in this embodiment, the controller 1 is always supplied with current from the storage battery 8, but since it is configured with a CMO3 etc., the power consumption is low in a static state, and the storage battery 8 is not consumed. has no effect. On the other hand, the paper detection switch 2 is turned on when the paper (military card) is in a printable position, and the print buffer monitoring circuit 3 continues to output a signal when unprinted data is in the print buffer.

First, when paper (cut sheets) is set in the printer, the paper detection switch 2 is turned on, so the controller 1 detects that the paper detection switch 2 is turned on and turns on the power switch 4. Power supply 8 is supplied to all circuits,
The printer enters a state of waiting for the arrival of print data. Here, when print data arrives, it enters the print buffer, but the print buffer monitoring circuit 3 continues to output signal 7 as long as the data exists in the print buffer. Furthermore, the controller
is to keep the printer powered on even if paper detection switch 2 is turned off while signal 7 is being output.
Continue to hold power switch 4 on.

Therefore, even if the paper runs out during printing, the print data will not be lost. In short, the controller 1 turns off the power switch 4 when both the paper detection switch 2 is in the off state and the signal 7 is not output.

This makes it possible to prevent the storage battery and the like forming the power source 8 from being exhausted.

〔Effect of the invention〕

As explained above, by providing a switch and a monitoring circuit, the printer of the present invention automatically turns off the power when there is no printing paper and no printing data, thereby minimizing the consumption of the power supply battery. It has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a printer showing one embodiment of the present invention. 1...Bont roller, 2...Paper detection switch, 3...Print buffer monitoring circuit, 4...
...Power switch, 8...Power supply.

Claims (1)

[Claims] 1. A printer comprising: a print paper detection switch; a reception buffer monitoring circuit; and a controller that controls power connection/disconnection based on the output of the print paper detection switch and the output of the reception buffer monitoring circuit.