JPH0334103A - Rotary head device - Google Patents

Abstract

PURPOSE:To prevent crosstalk between a recording signal a reproducing signal at transformer parts occurring when simultaneous recording and reproduction are performed by arranging a rotary transformer for recroding signal system separately from that for reproducing signal system in a head device provided with rotary heads for recording and reproduction. CONSTITUTION:When the simultaneous recording/reproduction are performed with plural rotary heads 2 for recording and plural rotary heads 3 for reproduction, a recording signal inputted from an external recording signal processing circuit to the recording signal input terminal 36 of a recording amplifier 4 is supplied to the head 2 via a recording amplifier system, then, the recording on a tape is performed. Also, a signal reproduced with the head 3 is supplied from an output terminal 57 to an external reproducing signal processing circuit via a reproducing amplifier system 38, then, the reproduction with a monitor is performed. At this time, the rotary transformer 23 dedicated for recording signal system is arranged separately from the rotary transformer 46 dedicated for reproducing signal system in upper and lower sides, respectively, which prevents the crosstalk between them occurring.

Description

[Detailed description of the invention] [Industrial application field] Misfire B) 4 is 1 For example l) Digital VT for Ivision
This invention relates to a rotary head device that is most suitable for application to R.

[Summary of the invention]

The present invention provides a rotary head device having a rotary head for recording and a rotary head for reproducing, in which a rotary transformer dedicated to the recording signal system and a rotary transformer dedicated to the reproducing signal system are arranged spaced apart from each other. The VC is used to prevent mutual glue a stalk between the recording signal, the reproduction signal and the reproduction signal during recording and reproduction.

[Traditional handling technique]

As a conventional example of an auxiliary rotating head device suitable for high-definition digital VTRs with a wide frequency band, for example, Japanese Patent Application Laid-Open No. 62-208409-ji, which was filed earlier by Honkōshi's Debutana,
There is an Ej bulletin.

This conventional rotary head device fjt has a recording rotary head and a reproducing rotary head, and a recording amplifier and a reproducing amplifier are installed above and below the disk portion of the rotary tram, and the recording amplifier and the reproducing amplifier are mutually connected. This is to prevent crosstalk between the two.

[Problems to be Solved by the Invention] However, in this conventional rotary head device, the recording amplifier, the reproduction amplifier, and the recording signal processing circuit external to the rotary head device and the reproduction signal processing f! Because the configuration was such that a single rotary transformer was used for electrical connection with the U cell, crosstalk, where the recorded signal was mixed into the reproduced signal at the rotary transformer part, was likely to occur during simultaneous recording and playback. There was a problem.

The purpose of the misfiring BA is to provide a rotary head device that prevents crosstalk between recording and reproduction signals in a rotary transformer portion during simultaneous recording and reproduction.

[2[1! Means for Solving the Problem] In order to achieve the above object, a rotary head device equipped with an uninvented recording rotary head and a reproducing rotary head includes a rotary transformer exclusively for the recording signal system and a rotary transformer exclusively for the reproducing signal system. The rotary transformer has two rotary transformers arranged at a distance from each other.

[For production]

In the rotary head device configured as described above, the rotary transformer for the recording signal system (U) and the rotary transformer dedicated to the playback signal system are placed apart from each other, so during simultaneous recording and playback, these rotary transformer parts It is possible to prevent crosstalk between the recorded signal and the reproduced signal from occurring.

〔Example〕

Below, we will discuss the uninvented l1 of digital VTR for high-definition.
An embodiment applied to an i121 transfer head device will be described with reference to the drawings.

FIG. 1 shows the entire rotary head device 1. In a high-definition digital VTR, multi-channel signals with a wide frequency band are handled, for example, the number of channels is 8. For example, two recording rotary heads 2 and two reproducing rotary heads 3 (four in total) are used, each sharing four channels, and the number of recording amplifiers 4 and reproduction amplifiers 5 is eight each. Total 1
There will be 6 pieces. In addition, the erasing rotary head (not shown) is also
Become an individual.

Next, the head rotating body 7 is composed of a rotating flange 7a and a rotating disk 7C fixed to the outer periphery of the rotating flange 7a by a plurality of screws 7b. and.

The plurality of recording rotary heads 2 and playback rotary heads 3
are fixed to the lower surface of the outer peripheral portion of the rotating disk 7c by screws 8.9, respectively, and these rotating heads 2,
3 is configured to be rotated by this head rotating body 7.

Next, a pair of upper and lower fixed drums consisting of an upper fixed drum 10 and a lower fixed drum 117 are rotated by the rotating head 2,
These fixed drums placed above and below 6 10.11V
i These sides are integrally fixed to each other via a drum holder 13 fixed by a plurality of screws 12.

The center of the rotation 7 flange 7a of the head rotor 7 is fixed to the outer periphery of the upper end of the motor shaft 14a of the motor 14 fixed to the lower part of the center of the lower fixed drum 11 by means of a screw 14b. 7 is configured to be rotationally driven. Note that 14c is a bearing for the motor shaft 14a.

This rotary head device 1Vc includes a recording amplifier system 1
6 and a reproduction amplifier system 38 are separated from each other.

In addition, the IT is integrated in a vertically spaced apart state.

That is, as shown in FIGS. 1 and 2, the recording amplifier system 1
6 indicates a plurality of recording rotary heads 2 and a rotary disk 7 fixed to the lower surface of a rotary disk 7c by a plurality of screws 8.
An annular relay board 18 fixed to the lower surface of c by a plurality of screws 17 is electrically connected by a plurality of harnesses 19, and this relay board 18 is fixed to the lower surface of the rotation 7 flange 7a by a plurality of screws 20. Annular relay board 21
A rotary transformer 23 dedicated to the recording signal system is arranged inside the relay board 21 and the lower fixed drum 11, and is electrically connected by a plurality of contacts 22 made of leaf springs.
The rotating cores 23a stacked in eight stages, for example, are electrically connected by a plurality of harnesses 24, and the fixed cores 23b of the rotary transformer 23, stacked in eight stages, for example, are electrically connected by a plurality of harnesses 24.
and the drum holder 13 by penetrating a part of the lower fixed drum 11.
The relay board 21 fixed to the drum holder 13 is electrically connected by a plurality of harnesses 26, and the relay board 25 and the recording amplifier board 27 fixed to the drum holder 13 and having the recording amplifier 4 mounted thereon are electrically connected by a connector 28. connected. The multi-stage rotating core 23a of the rotary transformer 26 is fixed to the outer periphery of a rotating inner cylinder 29 that is integrally molded at the lower part of the rotating flange 7a and is disposed inside the stationary drum 11 coaxially with the motor shaft 14a. The plurality of fixed cores 23b are fixed in the lower fixed drum 11 by a plurality of screws 30, and are fixed to the inner periphery of a fixed outer cylinder 31 disposed coaxially with the outer periphery of the rotating inner cylinder 29. Further, the relay board 25 and the recording amplifier board 27 are fixed by a plurality of screws 34 to a plurality of brackets 33 which are fixed to the drum holder 13 by a plurality of screws 32, and the outer periphery of the recording amplifier board 27 is covered with a cover 55. .

Note that 36 is a recording signal input terminal of the recording amplifier 4.

In addition, as shown in FIGS. 1 and 3, the reproduction amplifier system 5
Reference numeral 8 denotes a plurality of reproducing rotary heads 2 fixed to the lower surface of the one-rotation disk 7c by a plurality of screws 9' and a first stage reproducing head fixed to the upper surface of the rotary disk 7c by a plurality of screws 69 via a spacer 40. An annular reproducing amplifier board 41 on which an amplifier 5a is mounted is electrically connected by a plurality of harnesses 42, and an annular reproducing amplifier board 41 fixed to the upper surface of the rotational 7 flange 7a with a plurality of screws 43. The relay board 44 is electrically connected to the relay board 44 by a plurality of contacts 45 made of leaf springs.
and rotating cores 46a stacked in eight stages, for example, of a rotary transformer 46 for a reproduction signal system etc. arranged inside the upper fixed drum 10, are electrically connected by a plurality of harnesses 47. The inside of the fixed core 46b and the upper fixed drum 10 stacked in 8 stages! is electrically connected by a plurality of /)-nes 50 to an annular reproducing amplifier board 49 on which a second stage reproducing amplifier 5a is mounted, which is fixed by a plurality of screws 48. The multiple stages of rotating cores 46a of the rotary transformer 46 are fixed to the upper surface of the rotating 7 flange 7a with a plurality of screws 51, and the motor shaft 14 is fixed inside the upper fixed drum 10.
The fixed cores 46b in multiple stages are fixed in the upper fixed drum 10 by a plurality of screws 53, and are fixed on the outer periphery of the rotating inner cylinder 52 arranged on the same axis as the rotating inner cylinder 52. It is fixed to the inner periphery of a fixed outer cylinder 54 which is arranged in a central position. Note that the reproduction amplifier board 49 is attached to the fixed outer cylinder 5.
It is screwed onto the 4-7 flange 54a. Further, a cover 55 covering the upper end of the upper fixed drum 10 has a plurality of screws 5
6 to the upper fixed drum 10. In addition,
57 is a reproduction signal output terminal from the second stage reproduction amplifier 5b.

In the picture plate head device 1 configured as described above, when simultaneous recording and playback is performed using the plurality of recording rotary heads 2 and the plurality of reproduction rotary heads '3, a recording signal of the recording amplifier 4 is sent from an external recording signal processing circuit. The recording signal input to the input terminal 36 is transmitted to the recording amplifier board 27, the connector 28 . Relay board 25, harness 26. Rotary transformer 23, harness 24° relay board 21, contactor 22, relay board 18.
The recording t! The signal is supplied to the 121 transfer tape 2 and recorded on the tape.

Further, the reproduction signal reproduced from the tape by the reproduction rotary head 3 is transmitted to the harness 42 and the first stage reproduction amplifier 5a.
Reproduction amplifier board 41. Contactor 45, relay board 44. Harness 47. Rotary transformer 46,1% - Ness 50
．． The reproduction signal output terminal 57 is transmitted via the reproduction amplifier system 38 consisting of the reproduction amplifier board 49 of the second stage reproduction amplifier 5b.
The signal is supplied to an external reproduction signal processing circuit and reproduced on a monitor.

At this time, since the recording amplifier system 16 and the reproduction amplifier system 38 are separated from each other and integrated into one body with a distance of Km above and below from each other, the recording amplifier system 16 and the reproduction amplifier system 38 are connected to each other. Crosstalk between recorded and reproduced signals can be prevented.

In this case, especially the rotary transformer 23 dedicated to the recording signal system.
and a rotary transformer 46 dedicated to the playback signal system are arranged vertically apart from each other, so that crosstalk between the recording signal and the playback signal at the rotary transformer 23, 4, 6 portions is prevented during the above-mentioned simultaneous recording and playback. This can be prevented from occurring.

Therefore, high-precision simultaneous recording and playback can be performed in a high-definition digital VTR with a wide frequency band.

In addition, individual rotary transformers 23 separated into upper and lower
．． 46 rotating cores 23a% 46a and fixed cores 23b,
Since the number of laminated stages of the rotary transformer 46b is, for example, eight, it is possible to suppress the center runout of the rotating cores 23a, 46a of each rotary transformer 23, 46. Therefore, the gap 58 between the rotating cores 23a, 46a and the fixed cores 23b, 46b of each rotary transformer 23.46 is made small, so that these rotating cores 23a, 46a and the fixed core 23b.

It is possible to reduce signal transmission loss between the coil and the coil 46b.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical idea of the present invention.

Furthermore, the present invention is not limited to rotary head devices for digital VTRs, but can be applied to rotary head devices for various recording and reproducing devices.

〔Effect of the invention〕

The present invention is constructed as described above.

This produces the following effects.

A rotary transformer dedicated to the recording signal system and a rotary transformer dedicated to the playback signal system are placed apart from each other, and during simultaneous recording and playback, mutual glue a stalk occurs between the recording signal and the playback signal in these rotary transformer parts. Since this method has been designed to prevent this from occurring, high-precision simultaneous recording and playback can be performed in high-definition digital VTRs and the like that have a wide frequency band.

Since the rotary transformer is separated into one dedicated to the recording signal system and one dedicated to the reproduction signal system, it is possible to reduce the number of serially stacked stages of each rotary transformer, and to suppress the center runout of the rotating core of each rotary transformer. Therefore, it is possible to reduce the gap between the rotating core and the fixed core of each rotary transformer, and reduce the signal transmission loss between the coils of the rotating core and the fixed core.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view showing the entire rotary head device, Fig. 2 is a sectional view showing the recording amplifier system, and Fig. 3 is a sectional view showing the reproduction amplifier system. FIG. Also, in the reference numerals used in one drawing. 1. It is a rotary head device. 2 ・・・・・・・・・・・・ 3 ・・・・・・・・・ 4 ・・・・・・・・・・・・ 5 ・・・・・・・・・・・・ 7 ・・・・・・・・・・・・・・・ 10・・・・・・・・・ 11 ・・・・・・・・・ 16・・・・・・・・・ 23・・・・・・・・・ 38・・・・・・・・・46...Rotary head for recording Rotary head for playback Recording amplifier Playback amplifier head Fixed drum on top of rotating body Fixed drum below Recording amplifier system Rotary transformer Playback amplifier system Rotary transformer Representative Hitotsuchiya

Claims (1)

[Claims] A rotary head device including a recording rotary head and a reproducing rotary head, which includes a rotary transformer dedicated to the recording signal system and a rotary transformer dedicated to the reproduction signal system, and these rotary transformers are connected to each other. A rotary head device characterized by being arranged at a distance.