Patent ID: 8348011

Claim:
An earplug cushion for an earphone comprising: a central tube part having a size with a uniform inner diameter and wall thickness, having an end being a sound inlet and another end thereof being a sound outlet to form a first half tube section next to the sound inlet and a second half tube section next to the sound outlet; an elastic outer shield part joining to the sound outlet and extending to a side at which the sound inlet is located to cover the tube part; wherein the second half tube section is disposed with an outer annular groove which has a specific width with a depth less than the wall thickness of the tube part to form a buffer part capable of being bent an effective bending angle without changing the size of the central tube part such that the elastic outer shield part is twisted and deformed easily in an ear canal and capable of moving deeply inside the ear canal snugly with less oppression to the ear canal and no clearance between the earplug cushion and the ear canal for enhancing quality of sound transmitted via the earplug cushion when the earplug cushion engaging with an earphone is inserted into the ear.