JPS6125156U - Printer paper width detection device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief Description of the Drawings] Fig. 1 is a perspective view of a paper width detection device, Figs. 2 and 3 are schematic diagrams of a conventional paper width detection section, and Fig. 4 is a paper showing an embodiment of the present invention. A schematic diagram of the width detection section, Figure 5 is a configuration diagram of a circuit that extracts one detection signal from a plurality of output signals, and Figure 6 is a schematic diagram of the width detection section.
The figure is a graph showing the relationship between paper width and detection signal when the circuit of FIG. 5 is used. In the figure, 1a and 1b are tractors, 2 is printing paper, and 3
4 is a magnet, 4 is a Hall element, 5 is a sensor plate, 6 is a drive shaft, 7 is a shaft, and 8 is a control circuit for selecting and determining the lower one output of the ranked inputs.

Claims (1)

[Scope of claim for utility model registration] A tractor that can move in the width direction according to the width of printing paper,
In a printer comprising a mechanical section for holding the tractor, a plurality of sensors are arranged at equal intervals on the mechanical section for holding the tractor, a detected object is arranged on the tractor, and the length of the detected object is determined as above. A paper width detection device for a printer, characterized in that it is combined with a so-called control circuit that is set larger than the arrangement interval of the sensors and outputs only the smaller value when two or more of the sensors have outputs.