JPH0276312U

JPH0276312U -

Info

Publication number: JPH0276312U
Application number: JP15626688U
Authority: JP
Priority date: 1988-11-30
Filing date: 1988-11-30
Publication date: 1990-06-12

Description

[Brief explanation of drawings]

第１図と第２図は本案の異なる実施例の縦断面
図である。第３図は従来例の縦断面図である。４１……固定軸、５２，５３……ベアリング、
４３……筒状部、４４……外周面、４２……回転
ドラム、６２……外周面、５８……固定ドラム、
５７……ロータリトランス、６４……ロータリト
ランスのステータ、６５……ロータリトランスの
ロータ、４６……駆動モータ、４７……駆動モー
タのロータ、４８……駆動モータのステータ、６
９……磁気ヘツド。 1 and 2 are longitudinal sectional views of different embodiments of the present invention. FIG. 3 is a longitudinal sectional view of a conventional example. 41... fixed shaft, 52, 53... bearing,
43... Cylindrical part, 44... Outer peripheral surface, 42... Rotating drum, 62... Outer peripheral surface, 58... Fixed drum,
57... Rotary transformer, 64... Stator of rotary transformer, 65... Rotor of rotary transformer, 46... Drive motor, 47... Rotor of drive motor, 48... Stator of drive motor, 6
9...Magnetic head.

Claims

[Claims for Utility Model Registration] (1) A fixed shaft disposed at the center, a cylindrical portion rotatably attached to the fixed shaft via a bearing in the center, and a rotating drum having an outer circumferential surface concentrically disposed on the rotary drum; a center portion fixed to one end of the fixed shaft protruding from one end of the cylindrical portion; and a rotating drum concentrically adjacent to the outer circumferential surface of the rotating drum; a fixed drum having an outer peripheral surface arranged therein; a rotor of a rotary transformer arranged at one end of the cylindrical part and rotated together with the cylindrical part;
A stator of the rotary transformer is disposed concentrically opposite to the rotor of the rotary transformer and is fixed together with the fixed drum, and a center portion thereof is fixed together with the other end of the fixed shaft protruding from the other end of the cylindrical portion. a stator of a drive motor; a rotor of the drive motor that is arranged concentrically adjacent to the stator of the drive motor and rotatable with the rotating drum; A head drum assembly consisting of a quantitatively protruding head. (2) The head drum assembly according to claim 1, wherein the drive motor placement surface of the rotating drum has a recess, and the drive motor is disposed in the recess. (3) The head drum assembly according to claim 1, wherein the rotary transformer arrangement surface of the fixed drum has a recess, and the rotary transformer is arranged in the recess. (4) A fixed shaft located at the center, a cylindrical part rotatably attached to the fixed shaft via a bearing in the center, and an outer periphery arranged concentrically outside the cylindrical part. a fixed drum having a central portion fixed to one end of the fixed shaft protruding from one end of the cylindrical portion, and an outer circumferential surface arranged concentrically adjacent to the outer circumferential surface of the rotating drum; a rotor of a drive motor attached to one end of the cylindrical part; a stator of the drive motor arranged concentrically opposite to the drive motor and fixed to the fixed drum; and the other parts of the cylindrical part. a stator of a rotary transformer whose center portion is fixed to the other end of the fixed shaft protruding from the end; and a rotary transformer which is arranged concentrically opposite to the stator of the rotary transformer and rotatably arranged together with the rotating drum. A head drum assembly comprising a rotor, and a head that rotates together with the rotating drum and protrudes a predetermined amount from the outer peripheral surface of the rotating drum. (5) The head drum assembly according to claim 4, wherein the rotary transformer arrangement surface of the rotary drum has a recess, and the rotary transformer is arranged in the recess. (6) The head drum assembly according to claim 4, wherein the drive motor placement surface of the fixed drum has a recess, and the drive motor is placed in the recess.