Title:
MAGNETIC SHIELDING DEVICE FOR TAPE RECORDER
Document Type and Number:
Japanese Patent JPS57153561
Kind Code:
A
Abstract:
PURPOSE:To eliminate the adverse influence of leakage magnetic field from respective motors to a tape recorder by interposing magnetic shielding members between the revolving poles or between stationary coils of motors provided at every rotors for taking up, supplying and driving at a constant speed a tape. CONSTITUTION:A magnetic shielding member 83 is bonded to the face which is faced with rotor magnets 31, 32 of a board 36. Thus, it can prevent the adverse influence of magnetic field radiated from the rotor magnets 31, 32 and stator cores 41, 42 to the magnetic tape of a tape cassette or recording/reproducing heads. The portions of the rotor magnets 31, 32 and the stator cores 41, 42 may be covered by a magnetically shielding member 84 formed with through holes 841, 842 through which the rotational shafts 311, 321 of the rotor magnets 31, 32 are inserted approximately in box shape so as to magnetically shield the capstan motor 43, reel motor 44 and the magnetic tape and recording/reproducing heads 46.
Inventors:
ISHIGOU HIDEYASU
NISHIZONO MINORU
NISHIZONO MINORU
Application Number:
JP3771781A
Publication Date:
September 22, 1982
Filing Date:
March 16, 1981
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
H02K29/00; G11B15/26; (IPC1-7): H02K29/00