JPH0344801A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To simplify constitution and to reduce the cost of production as well as to provide stabler quality and higher performance by applying a printed wiring circuit on the stationary side of a rotary transformer to use this circuit for repeating of wirings and providing a shape projecting on the outer side of a drum. CONSTITUTION:A transformer stator 2 of the rotary transformer is fixed to the stationary lower drum 1. The transformer rotor 3 is so constructed as to be rotatable together with the rotating upper drum 4 mounted with a magnetic head. The projecting part 2a of the rotary transformer projects to the side outer than the outside diameter of the stationary lower drum 1 and the printed wiring circuit is provided on the surface. The transformer windings 2b are connected to the printed wiring circuit 2a. The cost of the production is reduced in this way and the stabler quality and higher performance are attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a rotary spatula 1-type digital cheap coater (R-
DAT), a rotating magnetic head installed in a video recorder (VTR), etc. It is related to the device.

[Conventional Technique ##i] Figure 6 is a side sectional view of a conventional rotating magnetic head device.
The figure is a cross-sectional plan view of the main part of the transformer stator shown in FIG. 6, and FIG. 8 is a plan view of the main part of the transformer stator shown in FIG.

In FIGS. 6 to 8, 1 is a fixed lower drum, 2 is a transformer stator, 3 is a transformer rotor, 4 is a rotating upper drum, and 5 is a relay board for transformer windings.

Conventionally, a rotary transformer (rotating transformer) has a rotating side (
The rotor) and the fixed side (stator) are both circular and have a disk-like cylindrical shape.In order to lead out the winding drum to the outside, the middle JII board 5 is attached to the fixed lower drum 1 or the transformer stator 2. It is fixed using methods such as gluing and screwing.

[Problem to be solved by the invention] However, in the conventional rotating magnetic head device as described above, a relay board is attached to the lower drum or the rotary transformer. ! The wires are led out and relayed, and parts such as a relay board, adhesive for mounting, and screws are required, which has the disadvantage that it is not possible to reduce the cost of parts, assembly costs, and management costs for defective products.

The present invention was made to solve these problems, and an object of the present invention is to provide a rotating magnetic head device that can simplify the configuration, reduce manufacturing costs, stabilize quality, and improve performance. shall be.

[Means for Solving the Problems] In order to achieve the above object, the rotating transformer stator of the rotating magnetic head device of the present invention has a shape that protrudes larger than the outer diameter of the fixed lower drum, and the rotating transformer stator It has a configuration in which the winding is connected to a printed wiring circuit provided in a portion leading out to the outside of the fixed drum, and
If necessary, it is also possible to mount an amplification element on the printed wiring circuit provided in the one-rotation transformer stator, and if necessary, the winding lead-out portion other than the circular portion facing the rotary transformer rotor can be installed. It is also possible to make the drum external projection part thinner than the circular part.

[Function] According to the present invention, a printed wiring circuit is provided on the fixed side of the rotary transformer, which is used for relaying the windings, and is also provided with a shape that protrudes from the outside of the drum, so that it can be amplified if necessary. The circuits and the like are also ref-capable.

[Embodiment] FIG. 1 is a side cross-sectional view showing an embodiment of the rotating magnetic head device of the present invention, FIG. 2 is a cross-sectional view of the principal part of FIG. 1, and FIG. FIG.

In FIGS. 1 to 3, 1 is a fixed lower drum, and 2 is a transformer stator of a rotating transformer, which is fixed to the fixed lower drum l. Reference numeral 3 denotes a transrotor, and 4 a rotating upper drum on which a magnetic head is mounted, which has a structure capable of rotating together with the transrotor 3.

2a is the rotating transformer stator protrusion, and the fixed lower drum l
2b is a transformer winding, and the transformer winding 2b is connected to the printed wiring circuit 2a.

Further, FIG. 4 is a side sectional view showing another embodiment of the present invention,
No. 5I2I is a sectional plan view of the main part of FIG. 4. In FIGS. 4 and 5, the part of the transformer stator 2 facing the transformer rotor 3 is circular, and the part other than the circular part, that is, the outer transformer stator protrusion 2a, is made thinner than the part facing the rotor 3. It is.

In addition, an amplifier circuit as a printed wiring circuit is attached to the transformer stator protrusion 2a. ? Of course, the shape and structure may depend on the shape and structure.

[Effects of the Invention] As explained above, the present invention has the effect of reducing manufacturing costs, stabilizing quality, and improving performance by applying a printed wiring circuit to the stator portion of a rotary transformer.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing one embodiment of the rotating magnetic head device of the present invention, FIG. 2 is a sectional view of the principal part of FIG. 1, and FIG. 4 is a side sectional view showing another embodiment of the present invention, FIG. 5 is a sectional view of the main part of FIG. 4,
FIG. 6 is a side sectional view of a conventional rotating magnetic head device, FIG.
The figure is a plan view of FIG. 6. In the figure. 1. Fixed lower drum 2 Nidorance stator 2a Nidorance stator protrusion 2b, transformer winding 3: Transformer rotor 4, rotating upper drum 5, relay board

Claims (3)

[Claims] (1) A rotating part consisting of a magnetic head fixed to a rotating upper drum, a rotating transformer rotor that rotates together with the rotating upper drum that transmits signals from the magnetic head, and a fixed lower part corresponding to this rotating part. In a rotating magnetic head device comprising a rotating transformer stator fixed to a drum, the rotating transformer stator has a shape that protrudes larger than the outer diameter of the lower fixed drum, and the windings of the rotating transformer stator are connected to the outside of the lower fixed drum. A rotating magnetic head device characterized in that it is connected to a printed wiring circuit provided in a portion leading to the magnetic head. (2) The rotating magnetic head device according to claim 1, wherein an amplifying element is mounted on a printed wiring circuit provided on the rotating transformer stator. (3) The rotation according to claim (1) or (2), characterized in that a protruding portion outside the drum of a winding lead-out portion other than the circular portion facing the rotating transformer rotor is made thinner than the circular portion. magnetic head device.