JPH04115302U - rotating drum device - Google Patents

Abstract

(57) [Summary] [Structure] Each channel of the rotary transformer stator 3 and rotary transformer rotor 4 is made independent, and non-magnetic conductive metal rings 7 are alternately stacked between each channel. Power is supplied to the reproduced signal amplification circuit 5 via the conductive metal ring 7. [Effect] Since each channel of the rotary transformer is separated, the amount of crosstalk is reduced, and the drum is made smaller and the number of parts is reduced.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a rotating drum device in a magnetic recording/reproducing device, and in particular to a slip link. A rotating drum device with an integrated structure of a rotary transformer and a rotary transformer, and a smaller size. Regarding.

0002

[Conventional technology]

Conventionally, this type of rotating drum device has a reproduction signal amplification circuit, as shown in Fig. 2(a). A slip ring 12 that supplies power to the rotary transformer rotor 4 is connected to the upper part of the rotary transformer rotor 4. It was attached to. Furthermore, the structure of the rotary transformer is as shown in Figure 2(b). Between each channel of rotary transformer stator 3 and rotary transformer rotor 4 A groove is provided in the groove, and a short ring 11 made of an annular conducting wire is embedded in the groove. It was designed to reduce crosstalk between each channel.

0003

[Problem that the idea aims to solve]

In the conventional rotating drum device described above, there is a slot on the top of the rotary transformer rotor. The disadvantage was that the overall height of the drum was increased because of the coupling arrangement. In addition, even if a short ring is installed on the rotary transformer, the rotary transformer core Because the channels are integrated, it is difficult to completely prevent crosstalk between adjacent channels. The problem was that it was difficult.

0004

[Means to solve the problem]

This invention consists of a magnetic head that records and plays back information on magnetic tape, a playback signal amplification circuit, and a slip ring that supplies power from the outside to the reproduced signal amplification circuit through a brush; A coaxial rotary transformer that transmits signals between the magnetic head and an external circuit. It has a rotating drum with a rotor and a rotating shaft that supports and drives this rotating drum. a fixed drum, and the magnetic tape is connected to the rotating drum and the fixed drum. In a rotating drum device for magnetic recording and reproducing, which wraps around the outer circumferential surface of a drum at a predetermined angle and travels. A non-magnetic conductive metal ring is placed between each channel of the coaxial rotary transformer. The metal rings are provided alternately on top of each other to replace the slip rings, and the metal The device is configured to supply power to the reproduced signal amplification circuit through a ring. Ru.

[0005]

【Example】

Next, the present invention will be explained with reference to the drawings.

[0006] Figure 1(a) is a sectional view of one embodiment of the present invention, and Figure 1(b) is an enlarged view of section C in Figure 1(a). FIG. 3 is a cross-sectional view in greater detail;

[0007] A magnetic head 2 is disposed on the rotating drum 1, and communication between the magnetic head 2 and an external circuit is established. The signal transmission is carried out through the cores of rotary transformer stator 3 and rotary transformer rotor 4. Do it through. There is a non-magnetic conductive material between each channel of the rotary transformer rotor 4. The metal rings 7 are arranged so as to be alternately overlapped, and the brush 6 on the fixed side is rotated. This conductive metal ring 7 is brought into contact. The rotating drum 1 has a rotating bearing on the fixed drum 8. It is supported by a rotating shaft 10 held by a conductive metal ring 7 and a rotary transformer. The rotor 4 has the same rotation center as the rotating drum 1. rotary transformer stay The rotary transformer rotor 3 is provided inside the rotary transformer rotor 4.

[0008] In this embodiment, the power to the reproduction signal amplification circuit 5 on the rotating drum 1 is is supplied between each channel of the rotary transformer rotor 4 from the brush 6 on the fixed side. This is done via a conductive metal ring 7 provided at the top. According to this configuration, the brush 6 Since it is placed close to the rotating drum 1, the overall height of the drum can be reduced, and the Adjacent channels of the tally transformer are separated by the conductive metal ring 7, so the cross Talk is reduced.

[0009]

[Effect of the idea]

As explained above, the present invention combines each channel of the rotary transformer rotor with Magnetic conductive metal rings are stacked alternately, and the playback signal is transmitted through the metal rings. Since power can be supplied to the amplifier circuit, the overall height of the drum can be lowered. In addition, each channel of the rotary transformer is completely separated by a metal ring. This has the effect of reducing crosstalk between adjacent channels. do. Furthermore, one part has two functions: slip ring and rotary transformer. This makes it possible to reduce the number of parts and production costs.

[Brief explanation of drawings]

1 shows an embodiment of the present invention, FIG. 1(a) is an overall sectional view, and FIG. 1(b) is a detailed sectional view of section C in FIG. 1(a).

FIG. 2 is a diagram showing a conventional example; FIG. 2(a) is an overall sectional view, and FIG. 2(b) is a detailed sectional view of section D in FIG. 2(a).

[Explanation of symbols]

1 Rotating drum 2 Magnetic head 3 Rotary transformer stator 4 Rotary transformer rotor 5 Reproduction signal amplification circuit 6 Brush 7 Conductive metal ring 8 Fixed drum 9 Rotating bearing 10 Rotation axis 11 Short ring 12 Slip ring

Claims (1)

[Scope of utility model registration request] 1. A magnetic head that performs recording and reproduction on a magnetic tape, a reproduced signal amplification circuit, a slip ring that supplies power to the reproduced signal amplification circuit from the outside via a brush, and between the magnetic head and an external circuit. a rotating drum having a rotor of a coaxial rotary transformer for transmitting signals, and a fixed drum having a rotating shaft supporting and driving the rotating drum, and the magnetic tape is connected to the rotating drum and the fixed drum. In a rotating drum device for magnetic recording and reproducing which runs while being wound around the outer peripheral surface at a predetermined angle, non-magnetic conductive metal rings are provided alternately overlapping each other between each channel of the coaxial rotary transformer, and the slip ring A rotating drum device characterized in that, instead of this, power is supplied to the reproduced signal amplification circuit via the metal ring.