Active capacitive touch pen

Abstract

An active capacitive touch pen includes a casing unit, a circuit unit, a power supply unit and a pen head unit. The casing unit includes a pen-shaped casing structure. The circuit unit includes a circuit substrate disposed inside the pen-shaped casing structure and at least one varistor disposed inside the pen-shaped casing structure and electrically connected to the circuit substrate. The power supply unit includes at least one power supply component disposed inside the pen-shaped casing structure and electrically connected to the circuit substrate. The pen head unit includes a pen head structure movably disposed inside the pen-shaped casing structure and an elastic structure disposed between the pen head structure and the varistor. The pen head structure has an exposed contacting portion exposed from the pen-shaped casing structure. Whereby, a predetermined pressure generated by pushing the pen head structure is transmitted to the varistor through the elastic structure.

Dependencies are inferred from the claim text.