JPH03232101A - Rotary drum device - Google Patents

Abstract

PURPOSE:To drastically decrease the crosstalks between recording signals and reproducing signals by transmitting the plural recording signals and the signal or plural erasing signals with an inner transformer part of a rotary transformer and transmitting the plural reproducing signals with an outer transformer part. CONSTITUTION:The recording signal transmitted from a core 5 for recording channels is supplied via a junction substrate 21 fixed to an inner disk 2a to a contact pin 22a. The recording signal is supplied from the contact pin 22a to a recording head 7. The reproducing signal from a playback head 8 is supplied through a hermetic terminal 24 to a reproducing amplifier 10 existing in an upper rotary drum 4. The transmission in the rotary transformer is executed with the different cores; for example, the transmission of the recording signals and erasing signals is executed with the inner core and the transmission of the reproducing signals with the outer core and, therefore, the recording signal and erasing signal and the reproducing signals are completely spacially separated. The crosstalks between the recording signals and the reproducing signals are decreased in this way and the simultaneous reproduction is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotating drum device suitable for use in high-definition digital video tape recorders and the like.

[Conventional technology]

In recent years, high-definition digital video tape recorders, etc., which are being developed, use a rotating drum device with multiple recording and multiple 7F playback heads to record and reproduce high-frequency signals at high signal densities. Recording is in progress.

By the way, in this type of conventional rotating drum device, crosstalk between the recorded signal and the reproduced signal is large, so it is difficult to perform so-called simultaneous reproduction, in which the signal is recorded and reproduced at the same time. there were.

Incidentally, examples of conventional rotating drum devices include the one described in Japanese Utility Model Application Publication No. 11716/1983.

[Problem to be solved by the invention]

As mentioned above, in conventional rotating drum devices used in high-definition digital video tape recorders, etc., little consideration was given to reducing crosstalk between recorded signals and playback signals, which is necessary for video tape recorders, etc. It was difficult to perform simultaneous playback, which is one of the functions.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotating drum device that can solve the problems of the prior art described above and can significantly reduce crosstalk between recorded signals and reproduced signals.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has a plurality of recording heads, a plurality of reproducing heads, and one or more erasing nozzles on the outer surface thereof. A cylindrical rotary transformer with a double-shaft structure separated into an inner transformer part and an outer transformer part is arranged between the attached upper rotating drum and lower fixed drum to record multiple records. A signal and one or more cancellation signals are transmitted through the inner transformer section (or outer transformer section) of the rotary transformer, and a plurality of reproduction signals are transmitted through the outer transformer section (or inner transformer section) of the rotary transformer. (Transformer section). Further, a transmission path of the plurality of recording signals and one or more of the erasing signals from the core of the inner transformer section (or outer transformer section) to the plurality of recording heads and one or more of the erasing heads, The outer transformer section (or inner transformer section) is arranged outside the upper rotating drum, and the plurality of playback signals are transmitted from the plurality of playback heads to the outer transformer section (or inner transformer section).
At least a portion of the transmission path leading to the core is disposed inside the upper rotating drum.

[Operation] According to the above configuration, in the rotary transformer, transmission of the recording signal and erasing signal and transmission of the reproduction signal are performed through different transformer parts, so the recording signal, the erasure signal, and the reproduction signal are spaced apart. In addition, the signal transmission path between the core of each transformer and each node is completely separated.
The recording signal, erasing signal, and the reproduction signal are spaced apart from each other, such that the transmission path for the recording signal and the erasing signal is outside the upper rotating drum, and the transmission path for the reproduction signal is partially inside the upper rotating tram. Since the recording signal and the reproduction signal are completely separated from each other, crosstalk between the recording signal and the reproduction signal is significantly reduced.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG. 2 is a sectional view schematically showing main components and signal transmission paths in the first embodiment.

Now, before explaining Figure 1, using Figure 2,
The main configuration and signal transmission path of this embodiment will be explained.

In FIG. 2, first, the rotating parts are the rotating shaft 1,
A rotor section 2 of a rotary transformer fixed to the rotating shaft 1, an upper rotating drum 4 fixed to the rotor section 2, and a recording head 7 and a reproducing head attached to the outer surface of the upper rotating drum 4. 8 and a reproducing amplifier 10 installed inside the upper rotating drum 4. Note that a plurality of recording heads 7 and a plurality of reproducing heads 8 are each attached to the upper rotating drum 4.

On the other hand, the fixed part is the lower fixed drum 12,
A stator section 13 of a rotary transformer is fixed to the lower fixed drum 12, and a reproducing amplifier 17 is installed inside the lower fixed drum 12.

The rotating shaft 1 and the lower fixed drum 12 are engaged with each other via a hair ring 28.

The rotor section 2 is composed of an inner disk section 2a to which the recording channel core 5 is attached, and an outer rotor section 2b to which the reproduction channel core 6 is attached. The rotary transformer is composed of an inner stator section 13a to which a channel core 4 and a reproducing channel core 16 are attached, and therefore, a rotary transformer composed of a rotor section 2 and a stator section 13 has a double shaft structure. The recording channel cores 5 and 14 face each other, and the reproduction channel cores 6 and 16 also face each other.

In FIG. 2, each component except for the recording head 7 and the reproduction throat 8 has a generally rotating body centered on the central axis of the rotating shaft 1.

The above is the configuration of FIG. 2. Next, the signal transmission path will be explained.

A plurality of recording signals inputted from outside the lower fixed drum 12 are inputted to the recording channel core 14 via the stator section 13 of the rotary transformer, as indicated by the dashed-dotted arrow in FIG. . Then, it is output from the recording channel core 5 via the transformer coupling,
The signals are input to each of the plurality of recording heads 7 via the rotor section 2 of the rotary transformer.

On the other hand, the plurality of reproduction signals outputted from the throat 8 to the plurality of reproductions are inputted to the reproduction amplifier 10 inside the upper rotating drum 4 and outputted, as indicated by the double-dashed arrow in FIG. The signal is then input to the reproduction channel core 6 via the rotor section 2 of the rotary transformer. and,
The signal is outputted from the reproduction channel core 16 via a transformer connection, inputted to and output from the reproduction amplifier 17 via the stator section 13 of the rotary transformer, and outputted to the outside of the lower fixed drum 12.

In this way, for recording signals, the inner core of the rotary transformer, that is, the recording channel core 5.14
The transmission path from the recording channel core 5 to the recording head 7 is arranged outside the upper rotary head 4.

On the other hand, the reproduction signal is transmitted via the outer core of the rotary transformer, that is, the reproduction channel core 16, and is then recorded.

A portion of the transmission path from the card 8 to the recording channel core 6 is disposed inside the upper rotary head 4.

The above is an explanation of the signal transmission path in FIG. 2.

Next, the detailed configuration and operation of this embodiment will be explained using FIG. 1.

In FIG. 1, a rotor portion 2 of a rotary transformer is fixed to a rotating shaft 1 by a fixing ring 3. As shown in FIG. The rotor section 2 has a surface for fixing the upper rotating drum 4, and includes an inner disk section 2a to which the recording channel core 5 is attached, an outer rotor section 2b to which the reproduction channel core 6 is attached. It is made up of.

On the other hand, on the outer surface of the upper rotating drum 4, there is a head mounting surface 9 fixed to the inner disk part 2a, and on the head mounting surface 9, there are a plurality of recording grooves 7 and a plurality of reproduction grooves.
An upper rotary drum 4 is attached to the drum 8.
A reproducing amplifier 10 is fixed inside by a spacer 11.

A stator section 13 of the rotary transformer is attached to the lower fixed drum 12 so as to face the rotor section 2 of the rotary transformer and to be concentric with the rotating shaft 1 . This stator section 13 has a recording channel core 14 for transmitting recording signals attached to the side facing the recording channel core 5 of the inner disk section 2a, and a recording channel core 14 for transmitting recording signals, and a reproduction channel core 6 of the outer rotor section 2b. On the opposite side,
Reproduction channel core 16 for transmitting reproduction signals
It consists of an inner stator portion 13a to which is pasted.

Further, inside the lower fixed drum 12, a next-stage playback amplifier 17 is fixed with a spacer 18, and the playback amplifier 17 has a connector I for taking out the playback signal to the outside.
9 is soldered.

Next, the signal transmission path will be explained with reference to FIG.

First, a plurality of recording signals from the outside are inputted from the connector 20, supplied to the core 14 of the inner stator section 13a, and transmitted between the core 14 and the core 5. The transmitted recording signal is supplied to contact pins 22a soldered to the substrate 21 via a relay board 21 fixed to the inner disk portion 2a. Here, the contact pin 22a is in contact with the pattern of the recording head relay board 23 connected to the recording head 7, and therefore, the recording signal is transmitted from the contact pin 22a to the recording via the pattern of the throat relay board 23. Each of the recording heads 7 is supplied with the recording head 7 .

Note that an erasing signal is also transmitted from the outside through the same transmission path as that for the recording signal described above, and is supplied to an erasing head (not shown).

Next, the plurality of reproduction signals from the plurality of reproduction heads 8 pass through the hermetic terminal 24 and are supplied to the pattern of the reproduction head relay board 25. Here, the contact pin 22b soldered to the playback amplifier 10 is in contact with the pattern of the playback head relay board 25, so that the playback signal is transmitted from the pattern of the playback head relay board 25 to the playback amplifier via the contact pin 22b. 10. The reproduction signal amplified by the reproduction amplifier 10 is supplied to a contact pin 22c soldered to the reproduction amplifier 10. Here, the contact pin 22c is fixed to the upper part of the rotor part 2 and is in contact with the pattern of the rotor relay board 26 connected to the core 6. Therefore, the reproduction signal is transmitted from the contact pin 22c to the rotor relay board 26. It is supplied to the core 6 of the outer rotor section 2b via the pattern. The reproduction signal transmitted between the core 6 and the core 16 passes through the reproduction relay board 27, is supplied to the reproduction amplifier 17 at the next stage, is amplified, and is then taken out to the outside through the connector 19.

FIG. 3 is a bottom view showing the head mounting surface and inner disk portion of the upper rotating drum in the first embodiment.

The recording head 7 and the reproducing head 8 are shown in FIGS. 1 and 2.
In the figure, they are depicted at positions facing each other with the rotating shaft 1 in between, but in reality, as shown in FIG. 3, they are arranged at 90 degrees from each other.

As described above, the recording signal transmitted from the recording channel core 5 is supplied to the contact pin 22a attached to the relay board 21 via the relay board 21 fixed to the inner disk 2a. Here, since the contact pin 22a is in contact with the pattern of the recording-1/node relay board 23 connected to the recording head 7, the recording signal is transmitted from the contact pin 22a to the recording head 7.
supplied to In addition, the reproduction signal from the reproduction throat 8 is
The signal is supplied to the reproducing amplifier 10 inside the upper rotating drum 4 through the hermetically connected terminal 24.

As explained above, in this embodiment, in the rotary transformer, the inner core (i.e., recording channel core 5I4) is used to transmit recording signals and erase signals, and the outer core (i.e., reproduction channel core 5I4) is used to transmit reproduction signals. Core for channel 6.1
6), the recording signal, the erasing signal, and the reproduction signal are completely separated spatially because they are performed via different cores. Further, the signal transmission path between the cores of the two rotor sections (that is, the recording channel core 5 and the reproduction channel core 6) and each head is also the upper rotating drum 4 for the transmission path of the recording signal and the erasing signal. The recording signal, the erasing signal, and the reproduction signal are completely separated spatially from each other, with a part of the reproduction signal transmission path inside the upper rotary drum 4. Therefore, crosstalk between the recorded signal and the reproduced signal can be significantly reduced.

Further, according to this embodiment, between the pattern of the recording head relay board 23 fixed to the head mounting surface 9 of the rotary drum 4 and the pattern of the relay board 21 fixed to the inner disk portion 2a. Since the contact pin 22a is used to transmit the signals, it is easy to connect between the relay boards.
Even if it is necessary to remove the upper rotating drum from the rotor portion 2, it can be easily removed, and the maintainability of the upper rotating drum is significantly improved.

Next, second and third embodiments of the present invention will be described using FIGS. 4 and 5.

FIG. 4 is a sectional view showing essential parts in a second embodiment of the present invention.

In this embodiment, for recording signals, the recording channel core 5 and the recording head 7 are connected by a connecting wire 29 instead of the relay board 2L23 and the contact pin 22a, and the outer rotor part of the inner disk part 2a is A wiring groove 30 having a U-shaped cross section is provided on the surface in close contact with 2b, and the aforementioned connection wire 29 is disposed within the wiring groove 30.

The same applies to the erase signal.

FIG. 5 is a sectional view showing essential parts in a third embodiment of the present invention.

In this embodiment, the recording signal is connected between the recording channel core 5 and recording, between the door and the relay base +ff21.
23 and the contact pin 22a, as in the second embodiment described above, the connection is made by a connecting wire 29, and a wiring groove having a U-shaped cross section is provided on the contact surface of the outer rotor portion 2b with the inner disk portion 2a. 31 is provided, and the aforementioned connection line 2
9 is disposed within the wiring groove 31. Further, the same applies even if there are 6 erase signals.

In the above-mentioned second and third embodiments, the above-mentioned first
Similar to the embodiment, the cocoon talk between the recorded signal and the reproduced signal can be significantly reduced.

(Effects of the Invention) According to the present invention, in the rotary transformer, the recording signal and erasing signal and the reproduction signal are transmitted through different transformer parts, so that the recording signal and erasing signal and the reproduction signal are They can be completely separated spatially. Also, the signal transmission path between the core of each transformer and each head is outside the upper rotating drum for the recording signal and erase signal transmission path, and part of the reproduction signal transmission path is outside the upper rotating drum. The recording signal, the erasing signal, and the reproduction signal can be completely separated spatially from each other. Therefore, it is possible to significantly reduce the cocoon talk between the recorded signal and the reproduced signal, and it is possible to perform simultaneous reproduction, which has been difficult in the past.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view schematically showing main components and signal transmission paths in the first embodiment, and FIG. FIG. 4 is a bottom view showing the head mounting surface and inner disk portion of the upper rotating drum in the first embodiment, FIG. 4 is a sectional view showing the main parts in the second embodiment of the present invention, and FIG. FIG. Explanation of symbols 1... Rotating shaft, 2... Rotor section of rotary transformer, 2a... Inner disk section, 2b... Outer rotor section, 4... Upper rotating drum, 7... Recording head , 8... Playback head, 10.17... Playback amplifier, 12... Lower fixed drum, 13... Stator section of rotary transformer, 13a... Inner stator section.

Claims (1)

[Claims] 1. An upper rotating drum that has a plurality of recording heads, a plurality of playback heads, and one or more erasing heads attached to its outer surface, and rotates together with these heads around a rotation axis; Below the upper rotating drum, there is a lower fixed drum fixed without rotating; It consists of a rotary transformer with a shaft structure and a cylindrical shape,
transmitting a plurality of recording signals and one or more erasing signals from the lower fixed drum to the plurality of recording heads and one or more erasing heads, respectively, through the rotary transformer, and transmitting a plurality of reproduction signals, In a rotating drum device in which a plurality of the recording signals and one or more erasing signals are transmitted from a plurality of the reproducing heads to the lower fixed drum via the rotary transformer, each of the plurality of recording signals and one or more of the erasing signals is transmitted to an inner transformer section of the rotary transformer. (or through the outer transformer part),
The plurality of reproduction signals are transmitted via the outer transformer section (or inner transformer section) of the rotary transformer, and the plurality of recording signals and one or more erase signals are transmitted via the inner transformer section (or outer transformer section). A transmission path from the core of the transformer section to the plurality of recording heads and one or more of the erasing heads is located outside the upper rotating drum, and the transmission path of the plurality of reproduction signals from the plurality of reproduction heads to the outer transformer is external to the upper rotating drum. A rotating drum device characterized in that at least a portion of a transmission path leading to the core of the transformer section (or inner transformer section) is inside the upper rotating drum. 2. The rotating drum device according to claim 1, wherein the upper rotating drum has a reproduction amplifier therein, and the plurality of reproduction signals are transmitted from the plurality of reproduction heads through the reproduction amplifier, and then A rotating drum device characterized by reaching the core of an outer transformer section (or an inner transformer section). 3. The rotating drum device according to claim 1 or 2, wherein a plurality of the recording signals and one or more of the erasing signals are transmitted from the core of the inner transformer section (or outer transformer section) to the plurality of recording heads and the single one. Alternatively, a rotating drum device characterized in that a contact pin is used as a part of the transmission path leading to the plurality of erasing heads. 4. The rotary drum device according to claim 1 or 2, wherein the rotor section of the rotary transformer includes an inner disk section that supports a core on the rotor section side of the inner transformer and a core on the rotor section side of the outer transformer. A wiring groove is provided on a surface of the inner disk portion that is in close contact with the outer rotor portion or a surface of the outer rotor portion that is in close contact with the inner disk portion, and a plurality of the A connection line is provided in a part of the transmission path of the recording signal and one or more of the erasing signals from the core of the inner transformer section (or outer transformer section) to the plurality of recording heads and the one or more erasing heads. A rotating drum device, characterized in that a part of the connecting wire is disposed within the wiring groove.