Portable acoustic device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorToshimasa Naruki
Life of this patent
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Abstract
A portable stereo system includes a body unit having a tape player and a hinge portion and loudspeaker units having matching hinge portions. The player and loudspeakers can be coupled by a hollow hinge shaft which doubles as a battery holder, and the entire flexible assembly can be fastened around the user's waist or slung across his shoulder by a belt which is detachably fastened to at least the loudspeaker units. If desired, the loudspeakers can be omitted and the belt coupled directly to the hinge shafts.
Claims27
A portable acoustic device in which sound recorded on a magnetic tape is reproduced through at least one loudspeaker, said device comprising:
- a body unit for generating signals corresponding to the sound recorded on a magnetic tape, said body unit having a first hollow hinge part with cylindrical inner walls and positioned on at least one side of said body unit;
- at least one loudspeaker unit receiving said signals for reproducing said recorded sound, said at least one loudspeaker unit having a second hollow hinge part thereon, said second hollow hinge part having cylindrical inner walls of substantially the same diameter as those of said first hollow hinge part;
- at least one cylindrical shaft passing through said first and second hollow hinge parts to thereby act as a hinge shaft about which said body unit and a least one loudspeaker unit are relatively rotatable, said shaft being of a form such that a battery can be fit therein;
- electrical signal connecting means between said body unit and said at least one loudspeaker unit;
- and
- electrical power connecting means between the interior of said shaft and said body unit.
A portable acoustic device in which sound recorded on a magnetic tape is reproduced through a loudspeaker comprising:
- a body unit for generating signals corresponding to the sound recorded on a magnetic tape, said body unit having at least one first hollow hinge part with cylindrical inner walls and positioned on at least one side of said body unit;
- electrical signal connecting means that is connected to said generated signal;
- at least one loudspeaker unit having a loudspeaker connected to said electrical signal connecting means receiving said signals for reproducing said recorded sound, said at least one loudspeaker unit having a second hollow hinge part thereon, said second hollow hinge part having cylindrical inner walls of substantially the same diameter as those of said first hollow hinge part;
- at least one hollow hinge shaft passing through said first and second hinge parts to mechanically couple said body unit and at least one loudspeaker unit for relative rotation, said hinge shaft being of a form such that a battery fits therewithin and being removable to separate said body unit and at least one loudspeaker unit for playing;
- electrical power connecting means between the interior of said hinge shaft and said body unit;
- at least one belt, one end of which is detachably connected to said at least one loudspeaker unit;
- and
- means for connecting the other end of said belt to the side of the combination of body and loudspeaker units opposite the side of the other belt end.
A cassette tape recorder in which sound recorded on a magnetic tape is reproduced, comprising:
- (a) a body unit for generating signals corresponding to the sound recorded on a magnetic tape;
- (b) first and second hollow hinge parts which are formed on either side of said body unit in such a manner that said first and second hollow hinge parts are spaced apart from each other;
- (c) two cylindrical, hollow hinge shafts inserted into said first and second hollow hinge parts at each side, respectively, of said body unit, said cylindrical hollow hinge shaft adapted to receive a battery or batteries;
- (d) belts fastened around respective ones of said cylindrical hollow hinge shafts;
- and
- (e) a head-phone jack and operating buttons for operating a magnetic tape cassette, provided on the top surface of said body unit.
Dependencies are inferred from the claim text.