Patent ID: 8942405
Filing Date: 2015-01-27
Classification: H04R

Abstract:
1. An acoustic earphone device, comprising: a casing enclosing at least one drive unit therein; a hollow extension member protruding from said casing and terminating in an acoustic output port; a movable cap disposed on the exterior of said casing, and slidably engaged therewith, such that the hollow extension member passes through the movable cap; a flexible flange surrounding the movable cap, said flexible flange adapted to create a seal surrounding the ear canal region when pressed thereto; a compressible elastic bulb at least partially surrounding the hollow extension member and gripped thereby; and a manually actuable pivoting lever connected to said casing such that when the lever is pivoted the movable cap slides relative to said casing; wherein relative motion of the movable cap with respect to the hollow extension member causes the compressible elastic bulb to decompress, thus becoming relatively elongate and narrow, or to compress, thus becoming relatively wide and squat.