Pen withdrawal trigger mechanism of electric pencil sharpener

Abstract

The invention provides a pencil retreating trigger mechanism of an electric pencil sharpener and belongs to the technical field of machinery. The problem that an existing electric pencil sharpener cannot allow a pencil to retreat automatically is solved. The pencil retreating trigger mechanism is arranged in a case of the electric pencil sharpener, a motor, a pencil holder connected with a sharpening component and a pencil entering component are arranged in the case, a transmission shaft is arranged between the motor and the pen holder, the pencil retreating trigger mechanism comprises an ejection rod arranged in the transmission shaft and a counter-emitting type optoelectronic switch and a control chip arranged in the case, the counter-emitting type optoelectronic switch and the motor are electrically connected with the control chip, and the upper end of the ejection rod extends into the pen holder. After the pencil is sharpened, the lower end of the ejection rod can be pushed by a pencil point to move downwards and trigger the counter-emitting type optoelectronic switch. A timing module is integrated on the control chip, when the counter-emitting type optoelectronic switch is triggered, the timing module starts to perform timing, and the control chip controls the motor to rotate reversely when time kept by the timing module reaches a preset value. The pencil retreating trigger mechanism has the advantages of high flexibility, fast response, timely pencil retreating and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to an electric pencil sharpener, in particular to a pen withdrawal trigger mechanism of the electric pencil sharpener. Background technique [0002] Electric pencil sharpener is a very common office stationery in the office. Today, the pace of work is accelerating and people are constantly pursuing convenience and efficiency in their work. brings great convenience. It generally includes a housing assembly, a tool holder assembly, a drive assembly and a power supply assembly, wherein: the knife holder assembly, the drive assembly, and the power supply assembly are arranged in the inner space of the housing assembly; the drive assembly is composed of a motor and a gear box, etc. The power is transmitted to the knife holder, and the hob on the knife holder is driven to automatically plan the pencil. After the planing is completed, the micro switch can be touched by the tip of the penc...

AI Technical Summary

Problems solved by technology

[0004] Although the automatic pen feeding device of the above-mentioned electric pencil sharpener replaces the original manual pen feeding method and improves the automatic function of the electric pencil sharpener, since the stop of the motor is realized by pressing the slider on the tip of the pencil to touch the micro switch, Moreover, it does not have the function of automatically withdrawing the pen, so as long as the user does not push the pencil out, the pencil tip will always press the slider to touch the micro switch

Sometimes the user inserts the pencil to deal with other affairs and forgets to pull out the pencil. If things go on like this, it will easily cause the sensitivity of the micro switch to decrease, and it will be difficult to reset, which will affect the function of the electric pencil sharpener.

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