The first mechanical pencil in the world was invented in England in 1822. 19 15 the Japanese Takashi Hayakawa invented a mechanical pencil. For export, he named this pencil "Universal Pointed Pencil". At first, this new writing tool was not recognized in Japan, and the demand in Japan increased rapidly. It was not recognized abroad until the export orders surged. Hayakawa also expanded its scale with its sales in mechanical pencil.
Mechanical pencil began to be popularized in Japanese campuses in the late1970s, and was mass-produced by Sharp Corporation of Japan. Before using mechanical pencil, you must put in a fine pencil lead made of graphite, and then close the back cover to prevent pencil lead from falling out. There is a spring in the mechanical pencil. Pressing the back cover can make the pen core extend from the front end for a fixed length and write fonts with the same thickness.
In order to keep writing smooth, wooden pencils need to be rolled frequently, and the appearance of mechanical pencil meets people's demand for convenient use. Mechanical pencil, as its name implies, is a pencil that can automatically or semi-automatically core without curling.
/kloc-In the middle of the 9th century, mechanical pencil appeared as a handicraft in Europe. /kloc-Germany began commercial production at the end of 0/9, but the lead core still needs to be polished by hand, and the output is limited. 1903, Japanese began to manufacture mechanical pencil by machinery, all of which were rotary. In the 1940s, American Parker Company produced the first batch of 0.9mm rotary mechanical pencil, and the lead core did not need to be sharpened manually. 1965, Japan successfully developed 0.5mm and 0.7mm synthetic resin thin lead cores, and developed a new three-jaw chuck to replace the traditional metal three-jaw chuck. In the same year, Japanese Pyrod fountain pen Co., Ltd. produced the pulsating fine core mechanical pencil for the first time. In 1970s, mechanical pencil with structural cores such as secondary push, double push and swing push were developed one after another. 1979, Faber Caster Pencil Factory in the Federal Republic of Germany introduced the automatic coring mechanical pencil for the first time. 1980 or so, the plastic two-jaw chuck was successfully developed, which made a new breakthrough in the material and structure of mechanical pencil.