Patent ID: 11966522
Assignee: DEXIN CORP.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A pen core, comprising:
a tip portion; and
an insertion portion connected to the tip portion;
wherein the insertion portion is electrically conductive and the tip portion is made of material being electrically conductive and writable on paper;
wherein the insertion portion comprises a rod portion, an abutting block portion, and an embedded portion, the abutting block portion is connected between the rod portion and the embedded portion, the abutting block portion has a cross-section in trapezoidal shape, the embedded portion is inserted into the tip portion and is tapered away from the abutting block portion, and the abutting block portion is tapered away from the embedded portion;
wherein the embedded portion comprises an extension part and a tapered part, one side of the extension part is connected to the abutting block portion, the tapered part of the embedded portion has a first end, a second end located opposite to the first end, an end surface and an annular inclined surface, the first end of the tapered part is connected to another side of the extension part, an outer diameter of the first end of the tapered part is equal to an outer diameter of the extension part, an outer diameter of the second end of the tapered part is smaller than the outer diameter of the first end of the tapered part, the end surface is located at the second end, the annular inclined surface extends from the first end to the second end of the tapered part, and the annular inclined surface is at an obtuse angle to the end surface.