Control method for pencil sharpener

Abstract

The invention discloses a control method for a pencil sharpener. First working currents are set, the first working currents are smaller than the working currents of a motor under high loads during normal cutting and are larger than the working currents generated when the motor only drives a hob assembly to rotate but does not conduct cutting. Shortest pencil inlet time is further set, and the shortest pencil inlet time is the time needed when the pencil is driven to enter the pencil sharpener and reach the deepest position of the pencil sharpener while the pencil is not cut. A control circuit and a monitoring device are arranged in the pencil sharpener, the control circuit is used for judging the working currents of the control circuit and the monitoring device detects and judges whether the pencil is completely got into the pencil sharpener, and therefore the motor is automatically controlled to switch the work state, automation of pencil sharpener cutting is achieved, and convenience and practicability are achieved.

Description

technical field [0001] The invention relates to a pencil sharpener, in particular to a method for controlling the pencil sharpener. Background technique [0002] The existing electric pencil sharpener generally puts the pencil into the sharpener mouth, and the electric pencil sharpener works automatically, starts to cut the pencil head, and then automatically completes the withdrawal of the pen. Set the time for sharpening the pen, or set the nib contact detection device to judge the timing of automatically withdrawing the pen. Although the program is simple, it is easy to make mistakes. When the sharpening time is fixed, if the inserted pencil is not long enough, it will easily cause the pencil to get stuck in the inner channel of the pencil sharpener and the pen cannot be retracted; when the pen tip is used to touch the detection device, if the inserted pencil breaks or Without a refill, it will cause the electric pencil sharpener to work for a long time. Therefore need ...

AI Technical Summary

Problems solved by technology

[0002] The existing electric pencil sharpener generally puts the pencil into the sharpener mouth, and the electric pencil sharpener works automatically, starts to cut the pencil head, and then automatically completes the withdrawal of the pen. Set the time for sharpening the pen, or set the pen tip contact detection device to judge the timing of automatic pen withdrawal. Although the program is simple, it is easy to make mistakes.

When the sharpening time is fixed, if the inserted pencil is not long enough, it will easily cause the pencil to get stuck in the inner channel of the pencil sharpener and the pen cannot be retracted; when the pen tip is used to touch the detection device, if the inserted pencil breaks or Without a refill, it will cause the electric pencil sharpener to work for a long time

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