Inflight headset for civil aircraft

Claim 2

An inflight headset comprising generally a headband having two downwardly depending ends, a pair of shanks coupled to said downwardly depending ends of said headband, and a pair of earpieces which are coupled to said shanks being provided to be disposed over the ears of a user; a stub being provided on a lower end of each said shank, a first annular groove being formed in said stub; a casing being integrally formed on a housing which receives a respective earpiece, said casing having an open end, a first oblong hole being formed in an upper end of said casing; a cap being provided for enclosing said open end of said casing; said first annular groove of said stub being engaged with said first oblong hole, and said stub being rotatably and frictionally coupled to said casing when said cap encloses said open end of said casing so that said earpieces can be easily adjusted to different rotational directions.

Claim 3

An inflight headset according to claim 1, wherein a second annular groove is formed in said stub in parallel relation to said first annular groove; a partition wall is laterally formed in said casing and a second oblong hole is formed in said partition wall, said second annular groove of said stub is engaged with said second oblong hole, and said stub is rotatably and frictionally coupled to said casing when said cap encloses said open end of said casing so that said earpieces can be easily adjusted to different rotational directions.

Claim 4

An inflight headset according to claim 2, wherein a rib is vertically formed on an inner surface of each lateral side of said open end of said casing, at least one pair of hooks are formed on said cap for engagement with said ribs of said casing when said cap is pushed to enclose said open end of said casing; a first block is integrally fixed to an upper end of said cap, and a first semi-circular recess is formed in said first block; a second block is integrally formed on a middle portion of said cap, and a second semi-circular recess is formed in said second block; when said cap is pushed to enclose said open end of said casing, said first block and said second block are engaged in said first oblong hole and said second oblong hole of said casing respectively, said first semi-circular recess of said first block joins said first oblong hole to form a first circular hole for engagement with said first annular groove of said stub, and said second semi-circular recess of said second block joins said second oblong hole to form a second circular hole for engagement with said second annular groove of said stub so that said stub is rotatably and frictionally coupled to said casing.