Magnetic transducer head supported by flexible diaphragm

Claim 2

A magnetic head assembly comprising a tubular magnetic head holder casing having a predetermined positioned axis, a first resilient film-like member extending over said tube perpendicular to said axis, a core support base provided on the first resilient member, at least one head core assembly supported on the base, said head core assembly comprising a recording and repRoducing core, an erasing core and a dummy core, said recording and reproducing core and said erasing core being disposed on the core base to trace the same track on a magnetic medium, and said dummy core being disposed on the core base at an apex of an imaginary triangle formed with the other two apexes at the locations of said recording and reproducing core and erasing core, said core having windings, means for holding the first resilient member in tension over the holder casing, a second resilient film-like member held in tension in the holder casing in a spaced relationship with respect to said first resilient member, and viscous liquid silicone oil damping means filling said space between the first and second resilient members in the holder casing, said first and second resilient members being held in opposing tension opposite each other and spaced apart by the damping filling means, said base being attached to said first resilient member for allowing the core to move in the axial direction relative to the surface of the first resilient member, thus making said core able to follow variations of contact on a magnetic surface of a magnetic medium which is generally parallel to said film-like members.

Claim 3

A magnetic head assembly comprising a tubular magnetic head holder casing having a predetermined positioned axis; a first resilient film-like member extending over said tube perpendicular to said axis; a core support base provided on the first resilient member; a head core assembly supported on the base, said head core assembly comprising a recording and reproducing core, an erasing core and a dummy core, said recording and reproducing core and said erasing core being disposed on the core base to trace the same track on a magnetic medium, and said dummy core being disposed on the core base at an apex of an imaginary triangle formed with the other two apexes at the locations of said recording and reproducing core and erasing core; means for holding the first resilient member in tension over the holder casing; a second resilient film-like member held in tension in the holder casing in a spaced relationship with respect to said first resilient member, each of the first and second resilient film-like members having a thickness of 0.1 - 1.0 mm; and silicone oil filling said space between the first and second resilient members in the holder casing, said silicone oil having a viscosity of 5,000 - 50,000 centi Stokes, said first and second resilient members being held in opposing tension opposite each other and spaced apart by the filled silicone oil, said base being attached to said first resilient member for allowing the core to move in the axial direction relative to the surface of the first resilient member, thus making said core able to follow variations of contact on a magnetic surface of a magnetic medium which is generally parallel to said film-like members.

Claim 4

A magnetic head assembly comprising a tubular magnetic head holder casing having a predetermined positioned axis; a first resilient film-like member extending over said tube perpendicular to said axis; a core support base provided on the first resilient member; a head core assembly supported on the base, said head core assembly comprising a recording and reproducing core, an erasing core and a dummy core, said recording and reproducing core and said erasing core being disposed on the core base to trace the same track on a magnetic medium, and said dummy core being disposed on the core base at an apex of an imaginary triangle formed with the other two apexes at the locations of said recording and reproducing core and erasing core; means for holding the first resilient member in tension over the holder casing; a second resilient film-like member held in tension in the holder casing in a spaced relationship with respect to said first resilient member, each of the first and second resilient film-like members having a thickness of 0.1 - 1.0 mm; and silicone oil filling said space between the first and second resilient members in the holder casing, said silicone oil having a viscosity of 5,000 - 50,000 centi Stokes, said first and second resilient members being held in opposing tension opposite each other and spaced apart by the filled silicone oil, said base being attached to said first resilient member for allowing the core to move in the axial direction relative to the surface of the first resilient member, thus making said core able to follow variations of contact on a magnetic surface of a magnetic medium which is generally parallel to said film-like members.