Touch-stopping safety system of paper shredder

Abstract

The invention belongs to the technical field of paper shredders and relates to a touch-stopping safety system of a paper shredder; the invention solves the problems that the existing touch-stopping safety system of the paper shredder has poor safety performance and low finger touch detection precision and accuracy; the touch-stopping safety system of the paper shredder comprises a self-oscillation circuit and a central processing unit which is connected on the self-oscillation circuit for switching the operating status of the paper shredder according to a signal generated by the self-oscillation circuit; the self-oscillation circuit comprises an input capacitance C which comprises conductor plates which are fixed at two sides of a paper inlet of the paper shredder and are arranged oppositely, and the self-oscillation circuit can generate a signal for leading the central processing unit to control the operating status of the paper shredder when the capacitance capacity of the capacitance C is changed, the touch-stopping safety system of the paper shredder has the advantages of high finger touch detection precision and accuracy, being suitable for parameter effect caused by the change of working environment and high safety performance.

Description

technical field [0001] The invention belongs to the technical field of paper shredders, and relates to a safety system for stopping a paper shredder. Background technique [0002] At present, paper shredders are becoming more and more popular in the office, and gradually become an indispensable office supplies in the office. In foreign countries, paper shredders have even been widely used in every household. It is believed that paper shredders will appear widely in domestic households in the near future. [0003] Traditional paper shredders are used in families, and there have been many accidents, especially injuries to children's fingers. Therefore, it is especially necessary to improve the safety performance of the shredder, so as to prevent children from inserting their fingers into the paper inlet of the shredder by mistake, resulting in accidents. Even in office applications, it often happens that staff mistakenly insert their fingers into the paper inlet of the shred...

AI Technical Summary

Problems solved by technology

However, the applicant believes that in practical applications, since the size of the shredder's paper inlet is fixed, different people's finger sizes are different, especially for the shredder used at home, children's fingers are even smaller, This causes some people's fingers to be smaller than the width of the paper inlet, and it is impossible to touch the first conductive part and the second conductive part at the same time when touching, and as the paper shredder is used for too long, the surface of the conductive part will Keep some poorly conductive or even insulating media such as dust. When the finger touches the first conductive part and the second conductive part at the same time, the switch circuit is not turned on. At this time, the triode in the switch circuit is still in the cut-off state, OUT output is in a high state, causing an accident

Therefore, it is difficult for this scheme to meet the requirements of high security performance

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