JPH04101902U - rotating drum device - Google Patents

Abstract

(57) [Summary] [Structure] Slip ring 7 and rotary transformer 4 mounted on rotating drum 1 supported by rotating shaft 10
is formed into an integral structure by a support 11, and the lower part of the support 11 is fitted onto the rotating shaft 10. [Effect] Centering of the slip ring and rotary transformer rotor during assembly is not adjusted, facilitating parts replacement and reducing assembly man-hours. In addition, space can be saved by reducing the number of parts.

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 rotary drive with an integrated structure of a rotary transformer and a rotary transformer, and no adjustment required during installation. related to system equipment.

0002

[Conventional technology]

Conventionally, this type of rotating drum device has a slip ring 27 and a slip ring 27, as shown in FIG. The rotary transformer rotor 24 is separate, and each is separated using a special jig. It was installed on the rotating drum 21 to adjust the rotational runout with respect to the rotating shaft 20. .

0003

[Problem that the idea aims to solve]

In the conventional rotating drum device mentioned above, the slip ring slides on the brush and wears out. However, the rotor of a rotary transformer has no contact with the stator. Since there is no need to replace the slip ring and the rotary transformer, It is supported by a separate member from the rotary drum, and the rotational runout is adjusted separately for each. Because it is fixed, installation work is difficult, and the mounting space for other parts is limited by the support member. There was a problem that the space became narrower.

0004

[Means to solve the problem]

The rotating drum device of this invention has a magnetic head that records and plays back on magnetic tape, and a Power is supplied externally to the signal amplification circuit and this reproduced signal amplification circuit via a brush. A coaxial type that transmits signals between the slip ring and the magnetic head and the external circuit. A rotary transformer has a rotor and a rotating drum that supports this rotating drum. and a fixed drum having a rotating shaft driven by the magnetic tape, the magnetic tape being driven by the rotating shaft. and a magnetic recording/reproducing device that wraps and runs at a predetermined angle on the outer peripheral surface of the fixed drum. and the rotating drum is attached to the support of the slip ring fixed to the rotating drum. Install the rotor of the rotary transformer so that the center of rotation is the same as the The support column has a fitting portion with the rotation shaft.

[0005]

【Example】

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

[0006] FIG. 1 is a sectional view of a rotating drum device according to an embodiment of the present invention.

[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 via the rotary transformer stator 3 and the rotary transformer rotor 4. I will do it. The power is supplied to the reproduced signal amplification circuit 5 by slipping from the brush 6 on the fixed side. This is done through ring 7. The rotating drum 1 is a rotary drum supported by a rotating bearing 9 on a fixed drum 8. Supported by a rotating shaft 10, the slip ring 7 and the rotary transformer rotor 4 rotate. It is attached so that the center of rotation is the same as that of the drum 1. That is, slip ring 7 The rotary transformer rotor 4 is adhesively fixed to the support 11 of the Integrate the rotary transformer rotor 4 and fit the lower part of the support 11 to the rotating shaft 10 By doing so, it is fixed to the rotating drum 1.

[0008] According to this embodiment, the rotating shaft 10→support body 11→rotary transformer Since the rotor 4 → slip ring 7 is assembled integrally, the rotor The centering of the rotor 4 and slip ring 7 is no longer adjusted, and the number of parts can be reduced. It can be measured.

[0009]

[Effect of the idea]

As explained above, this invention combines a slip ring and a rotary transformer rotor. The slip ring and rotor are molded in one piece and have a fitting hole for positioning. Eliminates the need for separate positioning of the retrans rotors and eliminates the need for special The effect is that assembly adjustments and parts replacement can be easily performed without the need for jigs. has. In addition, costs can be reduced by reducing the number of parts and assembly man-hours. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a rotating drum device according to an embodiment of the present invention.

FIG. 2 is a sectional view of an example of a conventional rotating drum device.

[Explanation of symbols]

1,21 Rotating drum 2 Magnetic head 3 Rotary transformer stator 4,24 Rotary transformer rotor 5 Reproduction signal amplification circuit 6 Brush 7,27 Slip ring 8 Fixed drum 9 Rotating bearing 10,20 Rotating axis 11 Support

Claims (1)

[Scope of utility model registration request] 1. A magnetic head for recording and reproducing information on a magnetic tape, a reproduction signal amplification circuit, and a slip ring for supplying electric power to the reproduction signal amplification circuit from the outside through a brush.
A rotary drum having a rotor of a coaxial rotary transformer for transmitting signals between the magnetic head and an external circuit, and a fixed drum having a rotary shaft supporting and driving the rotary drum, wherein the magnetic tape is In a magnetic recording/reproducing device that wraps around the outer peripheral surfaces of the rotary drum and the fixed drum at a predetermined angle and travels, the rotary transformer is mounted on a support of the slip ring fixed to the rotary drum so that the center of rotation is the same as that of the rotary drum. A rotating drum device, characterized in that a rotor is attached and the support has a fitting portion with the rotation shaft.