A simple tutorial on turning the pencil: Put the end of the pencil that needs to be sharpened into the small hole of the pencil sharpener, grab the handle with one hand, hold down the pencil sharpener with the other hand, and gently turn it clockwise.
The working principle of the hand-cranked pencil sharpener: The hand-cranked pencil sharpener is a manual double-hole multi-knife pencil sharpener, including a pencil sharpener, a knife body, a knife holder, and four lead sharpeners. knife, transparent upper cover, the conical cylindrical hole of the pencil sharpening body, the conical cylindrical hole of the lead sharpening core, the chip removal groove, the tool holder positioning groove, and the feed positioning surface. Among them, the pencil sharpening body knife is fixedly installed on the knife body, and the four Fix the lead core cutting knife in the knife holder, fix the knife holder in the positioning groove of the knife holder, fix the transparent upper cover on the knife body, and press the knife holder tightly.
The advantage of the utility model is that the step-by-step curling effect of the pen body and the lead is good, the lead is evenly stressed and not easy to break, the length of the lead is easy to control, and the pencil is sharpened during the curling process. The radial position is stable.
Pencil sharpener
Pencil sharpener is also called pencil sharpener (in different regions or different manufacturers that produce pencil sharpeners, pencil sharpeners are also called pencil sharpeners. : Pen plane, pencil sharpener, pencil sharpener, etc.), which are used to sharpen wooden pencils. Pencil sharpeners are divided into two types: mechanical and manual. With the rapid development of living standards and technology, penknives have also appeared in the form of electric drive.
Although this small tool is small, it also contains a lot of wisdom. Nowadays, the use of wooden pencils is increasingly replaced by mechanical pencils, but as a pencil sharpener that once served wooden pencils, , should not be forgotten by us.
Pen-turner
French mathematician Bernard Lassimone applied for the first patent for a pen-turner in 1828. In 1847, Therry des Estwaux invented the mechanical pencil sharpener, and the emergence of electric pencil sharpeners can be traced back to at least 1917. There are various pencil sharpeners on the market today. Although they come in different colors and shapes, the principles are the same.