Paper cutting structure of miniprinter

Abstract

The invention discloses a paper cutting structure of a miniprinter. The paper cutting structure comprises a driving cutter holder, wherein the driving cutter holder is arranged on a base in a penetrating manner, a driving cutter is arranged on the driving cutter holder, a driven cutter holder is arranged on a support in a penetrating manner and provided with a fixed cutter, one side of the driving cutter holder is fixedly connected with a rotary arm, a sliding pin is arranged at the bottom end of the rotary arm in a penetrating manner, a motor is arranged on the base, a worm is connected with a driving shaft of the motor in a penetrating manner and engaged with a worm wheel on the base, and a spiral groove that can accommodate the sliding pin and can drive the rotary arm to rotate by the sliding pin is arranged on the end surface of the worm wheel. In the invention, the worm-worm wheel transmission and rotation of the rotary arm driven by the spiral groove on the worm wheel are adopted, actually speed reduction motion is done twice, namely twice amplification action is obtained during the conversion from motor torque to rotary arm torque, the effect is equivalent to that of speed reduction by a multistage gear set, but the size of the structure disclosed by the invention is far smaller than that of the original structure, therefore, the structure is more applicable to paper cutting of a miniprinter.

Description

technical field [0001] The invention relates to a micro-printer, in particular to a paper-cutting structure of the micro-printer. Background technique [0002] Micro-printers are widely used in various industries, such as instrumentation, supermarkets, convenience stores, postal services, banks, tobacco monopoly, utility meter reading, mobile police systems, mobile government affairs systems, etc. At present, the paper-cut structure of micro-printing is usually It is divided into two types. The first one is the plane knife cutting structure. Its structure is that the cutting edge of the active knife and the driven knife are in plane contact when cutting and retracting. This design leads to the interaction between the active knife and the driven knife. The pressing force is relatively large, and the active knife and the driven knife are prone to surface contact wear. In addition, the installation and cooperation precision of the active knife and the driven knife is required t...

AI Technical Summary

Problems solved by technology

[0002] Micro-printers are widely used in various industries, such as instrumentation, supermarkets, convenience stores, postal services, banks, tobacco monopoly, utility meter reading, mobile police systems, mobile government affairs systems, etc. At present, the paper-cut structure of micro-printing is usually It is divided into two types. The first one is the plane knife cutting structure. Its structure is that the cutting edge of the active knife and the driven knife are in plane contact when cutting and retracting. This design leads to the interaction between the active knife and the driven knife. The pressing force is relatively large, and the active knife and the driven knife are prone to surface contact wear. In addition, the installation and cooperation precision of the active knife and the driven knife is required to be high; the second is the structure of the rotary paper cutter, which is mainly The rotary cutter is driven by a motor through a multi-stage gear set deceleration. Since the paper cutting structure of the rotary paper cutter is off-axis rotary cutting, the cutting and retracting process of the active knife and the driven knife is point contact, and the gap between the active knife and the driven knife The applied pressing force is very small, so the wear of the driving knife and the driven knife is minimized, and the tool life is long; the installation position tolerance between the driving knife and the driven knife is large

However, due to the reversing method of the rotating structure, the rotating shaft of the driving mechanism is a parallel shaft structure. To achieve a certain performance and life, it is necessary to form a larger structural volume

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