JPH0736201B2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus such as a VTR or DAT that records and reproduces a video signal by contacting a magnetic tape with a magnetic head.

2. Description of the Related Art In recent years, a magnetic recording / reproducing apparatus has been required to have multi-functional image quality including a VTR with a built-in camera. The number of heads such as voice heads for HiFi, flying erase heads, heads for each recording mode is increasing. Therefore, there is a demand for the development of a magnetic recording / reproducing apparatus equipped with a multi-head, multi-channel rotary transformer that can be used in a VTR or DAT with a small size and a strong demand for a camera. As an example, in the case of multi-channel which cannot be configured by a pair of rotary transformers, a configuration using two pairs of rotary transformers is adopted.

Hereinafter, the above-described conventional magnetic recording / reproducing apparatus will be described with reference to the drawings.

FIG. 3 is a sectional view of a main part of a conventional magnetic recording / reproducing apparatus. 21 is a tape guide drum, 22 is a magnetic head that contacts a magnetic tape (not shown), and 23 is a magnetic head 22.
Is a rotary drum on which the first rotary rotary transformer 24 for transmitting and receiving signals to and from the magnetic head 22 is fixed, and 25 is a rotary base for fixing the first rotary rotary transformer 24 and mounting it on the rotary drum 23.

26 is the first fixed side rotary transformer, and 27 is the first
Fixed side rotary transformer 26 holder, 28
Is a support for sliding the holder 27 up and down, 29 is the holder 27
Is a fixing screw for fixing to the support 28.

Reference numeral 30 is a mechanism base to which the support body 28 and the tape guide drum 21 are attached. Reference numeral 31 is a second rotary side rotary transformer, and 32 is a second rotary side rotary transformer.

The operation of the conventional magnetic recording / reproducing apparatus configured as described above will be described below.

First, the first rotary rotary transformer 24 fixed to the rotary base 25 is coaxially attached to the tape guide drum 21. Next, the first fixed-side rotary transformer 26
The support 28 is attached to the mechanism base 30 so as to be coaxial with the rotary transformer 24 on the rotation side. A spacer (not shown) is placed between the first rotary rotary transformer 24 and the first fixed rotary transformer, the first fixed rotary transformer 26 is pressed, and the holder is fixed with the fixing screw 29.
Fix 27 and remove the spacer.

As described above, a predetermined rotary transformer gap can be obtained.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, the play of the fitting portion between the support 28 and the holder 27, the perpendicularity of the mounting surface of the mechanism base 30 of the support 28 and the holder fitting hole, and the holder 27. Since the inclination of the surface of the fixed side rotary transformer 26 is determined by the mechanical accuracy such as the adhesion accuracy of the fixed side rotary transformer 26 and the fixed side, it is difficult to uniformly obtain the minute gaps necessary for transmitting and receiving signals. Had.

In view of the above problems, the present invention provides a high-performance magnetic recording / reproducing apparatus capable of uniformly obtaining a sufficiently small gap for transmitting / receiving a signal and capable of supporting a multi-head, multi-channel rotary transformer. The purpose is.

Means for Solving the Problems In order to solve the above-mentioned problems, a magnetic recording / reproducing apparatus of the present invention is a rotary rotary transformer mounted on a rotating portion of a tape guide drum, and is mounted and fixed on the outside of the tape guide drum. A fixed-side rotary transformer that is supported by a fixed support and that is arranged concentrically with the rotary-side rotary transformer at a concentric position with a small gap, and a support part that supports the fixed-side rotary transformer by the support. Is a holder fixed to the fixed rotary transformer and partially having a spherical portion, a pair of guide rings rotatable with respect to the holder, and an outer circumference of the guide ring holding the holder between the rotation side and The holding member and the guide ring that slidably hold in the direction in which the gap of the fixed-side rotary transformer changes are moved upward. It is provided with a fixing member that is pressed further to stop the sliding and rotating of the guide ring.

Action The present invention has a structure in which the holder is provided with the spherical portion and the guide ring is inserted to adjust the inclination and the clearance of the fixed rotary transformer at the same time in accordance with the surface of the rotary rotary transformer. The gap between the rotary transformer surface on the fixed side and the rotary transformer surface on the fixed side can be made sufficiently small and uniform, and high performance can be achieved.

Example Hereinafter, regarding a magnetic recording / reproducing apparatus of an example of the present invention,
A description will be given with reference to the drawings.

FIG. 1 shows a sectional view of an embodiment of the present invention.
FIG. 2 is a perspective view of an essential part of FIG.

Reference numeral 1 is a tape guide drum device, 2 is a magnetic head, 3 is a rotary drum to which the magnetic head 2 is attached, and 4 is a rotary side rotary transformer that sends and receives signals to and from the magnetic head 2. Reference numeral 5 denotes a rotary base that fixes the rotary transformer 4 and is attached to the rotary drum 3.

Reference numeral 6 denotes a stationary rotary transformer, and 7 denotes a holder to which the stationary rotary transformer 6 is fixed and which is made of a metal cutting product having a partial spherical portion.

Reference numeral 8 is a guide ring which has a spherical surface that matches the spherical portion of the holder 7 and which is made of a metal cutting product with the holder 7 sandwiched from both sides. Reference numeral 9 denotes a support body for sliding the guide ring 8 up and down, 10 a fixing screw for fixing the guide ring 8 to the holder 7, and 11 a mechanism base to which the support body 9 and the tape guide drum device 1 are attached.

A magnetic recording / reproducing apparatus configured as described above
This will be described with reference to FIGS.

The guide ring 8 in which the holder 7 is inserted is pushed into the support body 9, and the support body 9 is fixed to the mechanism base 11 so that the rotary side rotary transformer attached to the rotary drum 3 and the fixed side rotary transformer 6 become coaxial.

Then, a spacer (not shown) is placed between the rotary rotary transformer 4 and the fixed rotary transformer 6, the fixed rotary transformer 6 is pressed, the guide ring 8 is fixed by the fixing screw 10, and the spacer is removed. At this time, the fixed rotary transformer 6 can move in the rotation direction and the vertical direction, and can be fixed in parallel with the rotary rotary transformer 4.

As described above, according to this embodiment, since the spherical portion of the holder 7 is sandwiched by the guide ring 8, the holder 7 can rotate freely and the inclinations of the fixed rotary transformer 6 and the rotary rotary transformer 4 can be matched. At the same time, the guide ring 8 itself slides up and down in the guide portion of the support 9 to adjust the clearance. At this time, the holder
In the present embodiment, the guide ring 8 is made of a metal cutting material, but it is preferable to manufacture it by a sintered material, a hard resin material or the like which has a high friction coefficient and is less likely to be displaced due to a reaction when the fixing screw is tightened.

Although the support 9 is attached to the mechanism base 11 in this embodiment, it may be attached to the tape guide drum device.

As described above, according to the present invention, the spherical portion is sandwiched by the guide ring to support the fixed-side rotary transformer. Since the gaps can be adjusted at the same time while aligning the surfaces parallel to each other, a sufficiently small gap for transmitting and receiving signals can be uniformly set, and high efficiency and high precision can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of an assembly of essential parts of the figure, and FIG. 3 is a sectional view of essential parts of a conventional magnetic recording and reproducing apparatus. 1 ... Tape guide drum, 2 ... Magnetic head, 3 ...
Rotating drum, 4 …… Rotary side rotary transformer, 5 ……
Rotation base, 6 ... Fixed side rotary transformer, 7 ...
Holder, 8 ... Guide ring, 9 ... Support, 10 ...
Fixing screw, 11 …… Mechanism base.

Claims (1)

[Claims] 1. A rotary side rotary transformer mounted on a rotary portion of a tape guide drum and a support body fixedly attached to the outside of the tape guide drum, and supported through a minute gap with the rotary side rotary transformer. And a fixed-side rotary transformer that is arranged concentrically with each other, and a supporting portion of the fixed-side rotary transformer supported by the support body is fixed to the fixed-side rotary transformer, and a holder having a spherical portion in part. A pair of guide rings that have an inner wall shape that is substantially the same as the spherical portion of the holder and that are rotatable with respect to the holder when the spherical portion is sandwiched from both sides; and the guide ring that sandwiches the holder. And a guide that slidably holds the outer periphery of the rotary side and the fixed side rotary transformer in the direction in which the gap changes. Magnetic recording and reproducing apparatus according to claim and pressed from outside the ring further comprising a fixing member for locking the sliding and rotation of the guide ring.