JPS62220362A - Printer - Google Patents

Abstract

PURPOSE:To prevent a power source from being left ON, by providing a battery as the power source, using a dust cover as a paper guide and controlling the supply of source power from the battery by an output from a means for detecting the opening and closing of the dust cover. CONSTITUTION:When printing, a dust cover 1 is disposed in an opened position, while a printing paper 2 is inserted with the cover 1 as a paper guide, is wrapped around a platen 3, and is printed by a printing head 4. After printing is finished, the cover 1 is closed to a position for containing. This condition is detected by a detecting circuit 5, and source power from a battery is cut off. Even if a power switch is turned ON to apply the source power, the source power is not applied under this condition. Accordingly, it is possible to prevent the power switch from being left ON and to prevent the battery from being discharged due to an erroneous operation at the time of containing a printer.

Description

TECHNICAL FIELD The present invention relates to a printer using a battery as a power source, and more particularly to a method for saving power in a printer.

BACKGROUND TECHNOLOGY Conventionally, small printers that use batteries as a power source have a drawback that, because their power supply capacity is small, if an operator forgets to turn off the printer's power after completing printing, the printer will discharge and become unusable.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide a printer device using a battery as a power source, which can eliminate battery discharge caused by forgetting to turn off the power.

Composition of the Invention According to the present invention, there is provided a printer using a battery as a power source and a dustproof lid as a paper guide, in which a detection means for detecting the dustproof lid is used, and the output of the detection means is used to detect A printer device characterized by controlling power supply from a battery is obtained.

Embodiment Next, the present invention will be explained in more detail with reference to the drawings showing an embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, during printing operation, the dustproof lid 1 is positioned at the position shown by the solid line, and the printing paper 2 is moved using the dustproof lid 1 as a paper guide. It is inserted, wrapped around the platen 3, and printed by the print head 4.

When the dustproof lid 1 is closed and stored after the printing operation is completed, the dustproof lid 1 is positioned at the position shown by the broken line. The detection circuit 5 detects when the knock-proof lid comes to this position and turns off the power from a battery (not shown).

Further, when the dustproof cover is in the position shown by the broken line when the power is turned on, the power is not turned on even if the power switch is turned on.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention detects that the dustproof lid is opened and turns off the power, or prevents the power from being turned on unless the dustproof lid is opened. This is effective in preventing battery discharge due to forgetting to turn off the switch or erroneous operation when storing the printer.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an embodiment of the invention. Explanation of symbols of main parts 1...dustproof lid

Claims (1)

[Claims] A printer using a battery as a power source and a dustproof lid as a paper guide, comprising a detection means for detecting opening/closing of the dustproof lid, and controlling power supply from the battery based on the output of the detection means. Characteristic printer device.