Facing the pencil that is easy to break and needs to be cut frequently, the automatic pencil, which was born, is liked by everyone. You are not familiar with some of the little knowledge of automatic pencils, so today Xiaobian will tell you some little knowledge of automatic pencils. First of all, we need to know how the automatic pencil works. When you screw the pencil down, you will see a two-piece plastic piece with a metal ring. When you don't move, the metal ring covers the two-piece plastic piece. Use the friction to bite the lead. When you move, the plastic piece in the metal ring goes down together. When it reaches a certain position, the metal ring will be pressed, thus stopping the drop, and the plastic pieces continue to fall because they are separated. And the shape is outwardly separated by a certain angle. In the natural state, they can't bite the lead core, so when they are out of the constraint of the metal ring, the lead core is not constrained and descends, but only a distance, but your action triggers Soon the pencil rebounded, and the metal ring covered the plastic piece, and the lead core was dropped for a short time in a short time. Then you can write. There are many advantages to the automatic pencil: 1: Since the automatic pencil is automatically cored, it is not necessary for us to cut it frequently, and it is worried that the pencil ash will splash around and affect the health. 2: The automatic pencil body will not be shorter, so this saves the cost of buying pencils often. 3: The pen body is mainly made of polyurethane environmentally-friendly plastic materials, which are wear-resistant, anti-falling, shatterproof, and can be repeatedly changed to avoid waste. 4: The pen core is smart and the core is pressed, and the pressure is constant. 5: The pencil lead is prepared by baking with resin and graphite powder. It does not contain lead poison to avoid lead poisoning and damages the health of the body. 6: The core is round, full and even, ensuring the best writing quality and suitable for any paper. 7: Lead core usage rate can reach 91.6%. You know all these little things about automatic pencils. According to Xiaobian's introduction, does it feel that there is still a big mystery in its small body, and it is still a full-fledged environmental guardian. However, Xiao Bian still wants to remind you that there are too many fake and inferior products on the market, so you must remember to buy famous brands.
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