Hitachi, Ltd.

Shinji Okada

Hiroaki Ono

Shinji Ozaki

Toshio Ohji

A rotary drum assembly for a VTR including a rotary drum and a disk. The rotary drum fixedly holding magnetic heads, and first power feeding members (slip rings) included in a power feeding unit for feeding power to electronic signal processing circuit for processing signals for the magnetic heads are provided concentrically on the surface of the disk fixed to a spindle. First connecting members, fixedly provided on the rotary unit, connected to a wiring board connected to the terminals of the coils of the magnetic heads to transmit signals to or from the magnetic heads and to feed power fed through the first power feeding members of the power feeding unit to the wiring board, and second connecting members, provided between the wiring board and the first power feeding members, are secured to support plates, and the support plates are disposed in a region radially inside mating surfaces which are brought into contact each other in attaching the rotary drum to the disk.

Rotary drum assembly for a video tape recorder

A rotary magnetic head assembly comprises rotatable and stationary cylinders disposed in confronting relation to each other. A rotary transformer is arranged between the cylinders and includes confronting rotatable and stationary transformer cores fixedly mounted respectively to the rotatable and stationary cylinders. An annular supporting member is located at an outer peripheral surface of the stationary transformer core and includes support portions for supporting the stationary transformer core. Signal transmission junction elements are provided on the outer peripheral portion of the supporting member. The outer peripheral portion of the supporting member is provided with bores through which fixing members are inserted to fix the stationary transformer core to the stationary cylinder. The outer peripheral surface of the stationary transformer core is formed to have a non-circular shape so that the outer peripheral portion of the stationary transformer core can rest on the support portions of the supporting member.

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Katsuta, Japan

Shinji Okada