End-of-roll paper detection device, printing apparatus and detection method for end-of-roll paper

Abstract

A device for detecting the end of roll paper, comprising: a paper bin for accommodating roll paper, including a bottom wall and a side wall connected to the edge of the bottom wall; The printing roller on the side wall, the printing roller drives the roll paper to move and rotate in the direction close to the side wall of the paper output side, so as to move the paper of the roll paper out of the paper bin; the first photoelectric sensor is arranged in the paper bin and Near the junction of the bottom wall and the side wall of the paper output side; the detection area of ​​the first photoelectric sensor is located outside the largest section of the roll paper and coincides with the smallest section of the roll paper; the second photoelectric sensor is set in the paper bin Inside and adjacent to the first photoelectric sensor, the detection area of ​​the second photoelectric sensor coincides with the largest section and the smallest section of the roll paper. The detection result of the above roll paper exhaustion detection device is accurate and does not increase the complicated structure, avoiding the inconvenience caused by not being able to replace the roll paper in time when the roll paper is exhausted. Also provided is a printing device and a roll paper end detection method.

Description

technical field [0001] The invention relates to the field of printing equipment, in particular to a roll paper exhaustion detection device, a printing equipment and a roll paper exhaustion detection method. Background technique [0002] Roll paper is widely used in printing equipment such as supermarkets, shopping malls, and hospitals. When using this kind of printing equipment, the general working time is longer, the workload is larger, and the roll paper needs to be replaced frequently. In order to prevent printing out of paper, it will cause adverse effects on work and printing equipment. Generally, it is necessary to prompt to replace the roll paper when the roll paper is about to run out. Usually, a roll paper end detection device is installed on the side wall of the paper compartment of the printing device, and when the remaining volume of the roll paper reaches a preset value, an alarm signal is sent to prompt the user to replace the roll paper. [0003] This roll ...

AI Technical Summary

Problems solved by technology

[0003] This roll paper exhaustion detection device is usually only able to detect a certain amount of remaining roll paper. When the user receives the message that the paper is almost exhausted, he needs to pay attention to whether the roll paper is used up at any time, so as to avoid the printing content of the ticket paper being insufficient. The complete situation has increased unnecessary troubles for users

Or the alarm signal can only be issued when the roll paper has been used up, resulting in incomplete printing.

Therefore, the detection result of the above-mentioned roll end detection device is not accurate

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