CN1131509C - Head drum - Google Patents
Head drum Download PDFInfo
- Publication number
- CN1131509C CN1131509C CN97123028A CN97123028A CN1131509C CN 1131509 C CN1131509 C CN 1131509C CN 97123028 A CN97123028 A CN 97123028A CN 97123028 A CN97123028 A CN 97123028A CN 1131509 C CN1131509 C CN 1131509C
- Authority
- CN
- China
- Prior art keywords
- transducer
- drum
- signal
- magnetic
- magnetic drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
A magnetic drum includes: a fixed drum, fixedly installed in a block seat; a rotation drum, capable of coaxially installing with the fixed drum, and has a plurality of heads; a first converter installed on the rotating drum and connected with the head, for sending and receiving electric signals to/from the head; a second converter, installed on the fixed drum opposite to the first converter, for sending and receiving electric signals, and not connecting to the first converter; some channels, independently coiling on the second converter to compose a transmission channel; a short-circuit ring, coiling around the channels of the second converter, for the prevention of cross-signals therebetween; and electrical wires, electrically connected with a plurality of channels, and having a ground wire connected with the short-circuit ring for grounding.
Description
The present invention relates to be used for the magnetic drum of tape recording apparatus, more particularly, relate to and have the improved magnetic drum that is used for the rotary converter of signal transmission.
Usually, as shown in Figure 1, be used for the magnetic drum that magnetic recording is not equipped with and include: fixedly magnetic drum 2, are fixed on the drum that deck 7 is equipped with 1; Rotary head drum 3 rotatably with fixedly magnetic drum 2 coaxial installations, and has several magnetic heads 3a; Rotary converter fixedly respectively being equipped with one on magnetic drum 2 and the rotary head drum 3, is used to send and receive the detected signal by magnetic head 3a.Rotary converter comprises: first transducer 4, be installed on the rotary head drum 3, be used for when together rotating with rotary head drum 3 to/send and receive electric signal from magnetic head 3a; Second transducer 5 is installed in fixedly on the magnetic drum 2 with first transducer 4 is opposed, is used to send and receive the electric signal that induction current produces and does not contact with first transducer 4.Reference numeral 6 refers to link to each other with second transducer 5 and is used for to the magnetic drum power supply and received signal is sent to the electric wire in other places.Generally, be useful on signal transmssion line 6b (seeing Fig. 2 B) that transmits electric signal and the ground wire 6a that is used to form " 0 " current potential in the electric wire 6.
Fig. 2 A and 2B are the planimetric map and the rear view of second transducer 5 of rotary converter.
As shown in the figure, have the first channel 5a and second channel 5c in second transducer 5 and be used for the signal transmission.Each channel links to each other with signal transmssion line 6b in the electric wire 6 by the first and second lead 5b and 5d.In addition, between the first and second channel 5a and 5b, short-circuited conducting sleeve 5e is installed, is used for preventing the signal cross of each interchannel.In other words, short-circuited conducting sleeve 5e stops between the signal that is transmitted via first and second channel 5a and the 5b has electricity to crosstalk, thereby occurs noise when preventing each signal reproduction.Although not shown, on first transducer 4, be equipped with and the first and second channel 5a and opposed each respective channel of 5b, make and carry out independently signal transmission at corresponding mutually interchannel.
Yet, in traditional magnetic drum, can and be detained wherein subsequently along short-circuited conducting sleeve 5e inflow magnetic drum by the noise signal that short-circuited conducting sleeve 5e is shielded.This can make the signal transmission in the magnetic drum unstable.
The purpose of this invention is to provide a kind of magnetic drum, this magnetic drum has improved structure leaching the noise signal that is shielded by short-circuited conducting sleeve, and eliminates this signal subsequently.
To achieve the object of the present invention, the magnetic drum that is provided includes: fixing magnetic drum is fixedly mounted on the deck; Rotary head drum rotatably with the fixedly coaxial installation of magnetic drum, and has several magnetic heads; First transducer is installed on the rotary head drum and with magnetic head electrical and is connected, be used for to/send and receive electric signal from magnetic head; Second transducer is installed in fixedly on the magnetic drum with first transducer is opposed, is used for to send and to receive electric signal with the non-contacting mode of first transducer; Some channels are wound on second transducer independently and form signal transmission path; Short-circuited conducting sleeve is wound on the interchannel of second transducer, is used to stop signal cross therebetween; Electric wire is electrically connected with some channels, and has a ground wire that links to each other with short-circuited conducting sleeve and be used for ground connection.
Above-mentioned purpose of the present invention and advantage are incited somebody to action clearly by detailed description of the preferred embodiment and with reference to accompanying drawing, among the figure:
Fig. 1 is the decomposition diagram of traditional magnetic drum;
Fig. 2 A and 2B are respectively the planimetric map and the rear view of second transducer that is used for magnetic drum shown in Figure 1; And
Fig. 3 A and 3B are respectively the planimetric map and the rear view of second transducer that is used for magnetic drum of the present invention.
The magnetic drum of the preferred embodiment of the present invention includes: fixedly magnetic drum 2, are fixedly mounted on the deck 7; Rotary head drum 3 rotatably with fixedly magnetic drum 2 coaxial installations, and has several magnetic heads 3a, and it is identical with the situation of traditional magnetic drum shown in Figure 1.Equally, in rotary head drum 3, have first transducer 4,3a is electrically connected with magnetic head, be used for to/send and receive electric signal from magnetic head 3a.
In the fixedly magnetic drum 2 of magnetic drum of the present invention, be equipped with and first transducer, 4 opposed second transducers 10, be used to send and receive do not contact with first transducer 4 by the electric signal of induction current generation, this transducer is shown in detail among Fig. 3 A and the 3B.Second transducer 10 comprises: first and second channel 20 and 30 constitutes signal transmission path; Short-circuited conducting sleeve 40 is installed between first and second channels 20 and 30, is used to prevent the signal cross of each interchannel; Electric wire 50 has signal transmssion line 52 and a ground wire 51 that is used for ground connection of linking to each other with 30 with first and second channels 20.Reference numeral 21 refers to and is used for first lead that first channel 20 is connected with signal transmssion line 52, and Reference numeral 31 refers to and is used for second lead that second channel 30 is connected with signal transmssion line 52.
According to characteristics of the present invention, short-circuited conducting sleeve 40 and ground wire 51 interconnect by privates 41.In other words, the short-circuited conducting sleeve 40 that is installed between first and second channels 20 and 30 is connected with the ground wire 51 of electric wire 50, thereby will draw along the noise signal that short-circuited conducting sleeve 40 flows.Electric wire 50 links to each other with prime amplifier (PRE-AMP) 60, and this prime amplifier is amplified the signal that sends from magnetic drum.At this moment, ground wire 51 links to each other with earth terminal in the prime amplifier 60.So the noise that is trapped in the short-circuited conducting sleeve 40 is drawn from the earth terminal of prime amplifier 60, flow along ground wire 51.
According to this structure, stoped by short-circuited conducting sleeve 40 by crosstalking mutually between first and second channels 20 and 30 signals that send.In addition, the noise that is trapped in the short-circuited conducting sleeve 40 is drawn and is eliminated subsequently from ground wire 51.Thereby the tiny signal that sends or receive in the magnetic drum can accurately be transmitted and can not be subjected to The noise.
As mentioned above, in magnetic drum according to the present invention, drawn by the noise signal that short-circuited conducting sleeve shielded of second rotary converter and to be eliminated then, thereby prevented that noise is trapped in the magnetic drum.So the reproduction accuracy of magnetic drum can be stablized.In addition, can prevent the signal cross of each interchannel more reliably, thereby more effectively transmit tiny signal.
Claims (1)
1. magnetic drum includes:
Fixedly magnetic drum is fixedly mounted on the deck;
Rotary head drum rotatably with the coaxial installation of described fixedly magnetic drum, and has several magnetic heads;
First transducer is installed on the described rotary head drum and with described magnetic head electrical and is connected, be used for to/send and receive electric signal from described magnetic head;
Second transducer is installed on the described fixedly magnetic drum with described first transducer is opposed, is used for sending and receives electric signal and do not contact with described first transducer;
Some channels independently are wound on described second transducer and constitute signal transmission path;
Short-circuited conducting sleeve is wound on per two interchannels of described second transducer, is used to prevent signal cross therebetween; And
Electric wire, be electrically connected with described some channels, and have a ground wire that links to each other with described short-circuited conducting sleeve and be used for ground connection, electric wire is linked on the prime amplifier, this prime amplifier is used for amplifying the signal that each channel sends, and ground wire is linked the earth terminal of prime amplifier.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR77012/1996 | 1996-12-30 | ||
| KR1019960077012A KR19980057713A (en) | 1996-12-30 | 1996-12-30 | Head drum |
| KR77012/96 | 1996-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1186997A CN1186997A (en) | 1998-07-08 |
| CN1131509C true CN1131509C (en) | 2003-12-17 |
Family
ID=29774890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97123028A Expired - Fee Related CN1131509C (en) | 1996-12-30 | 1997-11-27 | Head drum |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR19980057713A (en) |
| CN (1) | CN1131509C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09115103A (en) * | 1995-10-16 | 1997-05-02 | Hitachi Ltd | Rotary transformer, rotary drum device using it and recording/reproducing device using the rotary drum device |
-
1996
- 1996-12-30 KR KR1019960077012A patent/KR19980057713A/en not_active Application Discontinuation
-
1997
- 1997-11-27 CN CN97123028A patent/CN1131509C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09115103A (en) * | 1995-10-16 | 1997-05-02 | Hitachi Ltd | Rotary transformer, rotary drum device using it and recording/reproducing device using the rotary drum device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980057713A (en) | 1998-09-25 |
| CN1186997A (en) | 1998-07-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031217 Termination date: 20141127 |
|
| EXPY | Termination of patent right or utility model |