DE3714026A1 - Magnetic information carrier with magnetic field protection - Google Patents
Magnetic information carrier with magnetic field protectionInfo
- Publication number
- DE3714026A1 DE3714026A1 DE19873714026 DE3714026A DE3714026A1 DE 3714026 A1 DE3714026 A1 DE 3714026A1 DE 19873714026 DE19873714026 DE 19873714026 DE 3714026 A DE3714026 A DE 3714026A DE 3714026 A1 DE3714026 A1 DE 3714026A1
- Authority
- DE
- Germany
- Prior art keywords
- information
- magnetic
- magnetic field
- magnetic carrier
- information carrier
- 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.)
- Withdrawn
Links
- 239000002184 metal Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 4
- 239000000956 alloy Substances 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 2
- 239000002923 metal particle Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 6
- 229910001092 metal group alloy Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/03—Containers for flat record carriers
- G11B23/0301—Details
- G11B23/0313—Container cases
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/04—Magazines; Cassettes for webs or filaments
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/50—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges
Abstract
Description
Informationsmagnetträger (IMT) z. B. Audio-Cassetten, Video- Cassetten, Digital Audio Tapes, Disketten und andere für ein digitales oder analoges Verfahren zum Aufzeichnen von Informationen oder zur Wiedergabe gespeicherter Informationen sowie zur Speicherung aufgezeichneter Informationen auf einem Informations magnetträger mit speziellem Magnetfeldschutz.Information magnetic carrier (IMT) z. B. audio cassettes, video Cassettes, digital audio tapes, floppy disks and others for one digital or analog method for recording information or to play back stored information and to Storage of recorded information on an information magnetic carrier with special magnetic field protection.
Informationsmagnetträger mit einem den Informationsmagnetträger umgebenden Gehäuse, zum Schutz des IMT und auf dem IMT gespeicherter Informationen vor mechanischen und anderen Einflüssen.Information magnet carrier with the information magnet carrier surrounding housing, to protect the IMT and on the IMT stored information before mechanical and others Influences.
Es ist bekannt zur Begründung der Erfindung, daß ein sogenannter Fahradey-Effekt existiert, auf welchem sich die Isolation von Hochfrequenzkabeln begründet. Das Kabel, durch welches ein Hochfrequenzstrom geleitet wird, ist von einem Gitter umgeben, welches die Aufgabe hat, die durch den Hochfrequenz strom erzeugten Magnetfelder nach außen hin abzuschirmen, so daß diese Magnetfelder keine störenden Einflüsse ausüben können.It is known to justify the invention that a so-called Fahradey effect exists on which the isolation of High-frequency cables justified. The cable through which a high frequency current is conducted from a grating surrounded, which has the task by the high frequency shield the magnetic fields generated from the outside, so that these magnetic fields do not have any disruptive influences can.
Es ist außerdem bekannt, daß die Gehäuse von Audio-Cassetten und anderen aus ABS-Kunststoff gefertigt werden. Dieses Gehäuse aus ABS-Kunststoff gewährt einen optimalen Schutz der Cassette vor mechanischen Einflüssen wie z. B. versehentliches Fallenlassen. It is also known that the casing of audio cassettes and others are made of ABS plastic. This ABS plastic housing provides optimal protection the cassette against mechanical influences such. B. accidental Drop.
Die bisher bekannten Gehäuse von Informationsmagnetträgern bieten zwar einen ausreichenden Schutz vor mechanischen Ein flüssen, jedoch schützen diese den Informationsträger und die darauf gespeicherten Informationen nicht vor Magnetfeldern, welche eine abgespeicherte Information zum Teil oder auch vollständig zerstören können, d. h. die Information wird durch ein Magnetfeld gelöscht.The previously known housings for information magnetic media offer sufficient protection against mechanical input flow, but they protect the information carrier and the information stored on it is not in front of magnetic fields, which is partly or also a stored information can completely destroy, d. H. the information will erased by a magnetic field.
Der Erfindung liegt die Aufgabe zugrunde, ein Gehäuse für Informationsmagnetträger zu fertigen, welches dem Informationsmagnetträger einen größtmöglichen Schutz vor schädlichen Einflüssen eines von außen wirkenden Magnetfeldes erbringt.The invention has for its object a housing to produce for information magnetic carriers, which the Information magnetic media provide the greatest possible protection against harmful influences from outside Magnetic field provides.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Gehäuse eines Informationsmagnetträgers einen Magnetfeldschutz enthält, welcher auf dem Fahrradey-Effekt basiert und darin begründet ist.The object is achieved in that the Magnetic field protection housing of an information magnetic carrier contains, which is based on the Fahrradey effect and in it is justified.
Das bedeutet, daß in das Gehäuse ein Metallgitter eingefügt wird. Eine weitere Möglichkeit einen Magnetfeldschutz nach dem Fahrradey-Prinzip zu erzielen liegt darin, Metall oder eine Metall-Legierung auf das Gehäuse oder in das Gehäuse einzustreuen, oder aber das Gehäuse mit einer Metallschicht zu überziehen.This means that a metal grid is inserted into the housing becomes. Another option is a magnetic field protection The Fahrradey principle is to achieve metal or a metal alloy on the housing or in the housing sprinkle, or the housing with a metal layer to cover.
Soll eine magnetfeldschützende Schicht in das Gehäuse eingestreut werden, so kann dies in der Art und Weise geschehen, daß Metall-Partikel oder Partikel aus einer Metall-Legierung während der Gehäuseherstellung direkt in den Kunststoff eingestreut werden und so verteilt werden, daß sich diese Partikel gleichmäßig in dem Gehäuse verteilen, um somit einen optimalen Schutz vor äußeren Magnetfeldeinflüssen zu erreichen. Dabei muß ein Material ausgewählt werden, welches den besten Schutz vor äußeren Magnetfeldeinflüssen gewährt. Die Lösung der Aufgabe einen Magnetfeldschutz eines Informations magnetträgers zu schaffen begründet sich in den Patentansprüchen 1 bis 5. A magnetic field protective layer should be sprinkled into the housing can be done in such a way that Metal particles or particles from a metal alloy during the manufacture of the housing directly into the plastic are sprinkled in and distributed so that these particles Distribute evenly in the housing to ensure optimal To achieve protection against external magnetic field influences. A material must be selected which is the best Protection against external magnetic field influences granted. The solution to the problem of magnetic field protection of information Creating magnetic carriers is based on the patent claims 1 to 5.
Die erzielbaren Vorteile der Erfindung liegen insbesondere darin, daß die Magnetschicht eines Informationsmagnetträgers gegen die Einflüsse eines Magnetfeldes, wie es durch einen herkömmlichen Magneten, starke Motoren oder Lautsprecher boxen und andere entsteht, geschützt wird.The achievable advantages of the invention are in particular in that the magnetic layer of an information magnetic carrier against the influences of a magnetic field, as caused by a conventional magnets, powerful motors or loudspeakers boxing and others arises, is protected.
Somit ist gewährleistet, daß Informationen die auf einem Informationsmagnetträger gespeichert sind nicht teilweise oder vollständig zerstört, also gelöscht werden.This ensures that information on a Magnetic information carriers are not partially stored or completely destroyed, i.e. deleted.
Somit wird eine längere Haltbarkeit, insbesondere bei auf einem Informationsmagnetträger abgespeicherter Informationen erreicht.Thus, a longer shelf life, especially when on an information magnetic carrier of stored information reached.
Die Gefahr, daß eine abgespeicherte Information ungewollt durch die äußeren Einflüsse eines Magnetfeldes zerstört werden, wird somit soweit technisch möglich herabgesetzt.The danger that stored information is unwanted be destroyed by the external influences of a magnetic field, is thus reduced as far as technically possible.
Das Ausführungsbeispiel wird in der folgenden schematischen Zeichnung dargestellt. Es zeigtThe embodiment is shown in the following schematic Drawing shown. It shows
Ein Informationsmagnetträger mit einem Magnetfeldschutz in Form eines Gitters dargestellt in Fig. 1.An information magnetic carrier with magnetic field protection in the form of a grid is shown in FIG. 1.
In den Informationsmagnetträger (1) wird ein Gitter aus einem Metall oder einer Metall-Legierung eingefügt. Das Material, aus dem das Gitter (2) besteht, muß eine sehr hohe Fähigkeit haben ein Magnetfeld von der Magnetschicht des Informations magnetträgers fernzuhalten, so daß keine störenden Einflüsse die Magnetschicht erreichen können.A grid made of a metal or a metal alloy is inserted into the information magnet carrier ( 1 ). The material from which the grid ( 2 ) is made must have a very high ability to keep a magnetic field away from the magnetic layer of the information carrier so that no interfering influences can reach the magnetic layer.
Dieses Gitter kann entweder auf dem Gehäuse aufliegen, oder aber auch direkt in das Gehäuse integriert sein.This grid can either rest on the housing, or but also be integrated directly into the housing.
Ein Informationsmagnetträger (1) mit eingestreuten Partikeln aus einem Metall oder einer Metall-Legierung oder aus einer chemischen Verbindung und/oder Zusammensetzung (2) dargestellt in Fig. 2.An information magnetic carrier ( 1 ) with interspersed particles made of a metal or a metal alloy or of a chemical compound and / or composition ( 2 ) shown in FIG. 2.
In das Material aus dem das Gehäuse gefertigt wird, werden Metallpartikel oder Metall-Legierungspartikel eingestreut oder aufgestreut, so daß ein Schutz vor einem Magnetfeld ge bildet wird.In the material from which the housing is made Metal particles or metal alloy particles interspersed or sprinkled, so that protection against a magnetic field ge is forming.
Vorstellbar ist auch, daß es sich bei diesem Partikel um eine besondere chemische Verbindung handelt, welche die gleiche Wirkung hat wie ein Metall oder eine Metall-Legierung. Diese Formen dienen alle dazu, die Magnetschicht eines Informationsmagnetaufzeichnungsträgers vor den störenden Einflüssen eines Magnetfeldes zu schützen.It is also conceivable that this particle is a special chemical compound that is the same It works like a metal or a metal alloy. These shapes all serve to create a magnetic layer Information magnetic recording medium in front of the disturbing Protect influences of a magnetic field.
Die Fig. 1 und die Fig. 2 zeigen eine Compakt-Cassette. Anwendbar sind diese Ausführungsbeispiele jedoch auf alle anderen Informationsmagnetträger, die in ein Gehäuse zum Schutz der Magnetschicht eingebettet sind wie Video-Cassetten, Digital Audio Cassetten, Disketten und andere. Figs. 1 and FIG. 2 show a compact cassette. However, these exemplary embodiments can be applied to all other information magnetic carriers which are embedded in a housing for protecting the magnetic layer, such as video cassettes, digital audio cassettes, floppy disks and others.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873714026 DE3714026A1 (en) | 1987-04-27 | 1987-04-27 | Magnetic information carrier with magnetic field protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873714026 DE3714026A1 (en) | 1987-04-27 | 1987-04-27 | Magnetic information carrier with magnetic field protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3714026A1 true DE3714026A1 (en) | 1988-11-17 |
Family
ID=6326366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19873714026 Withdrawn DE3714026A1 (en) | 1987-04-27 | 1987-04-27 | Magnetic information carrier with magnetic field protection |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3714026A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5875158A (en) | 1995-01-25 | 1999-02-23 | Discovision Associates | Servo control system for information storage device |
| US5974007A (en) | 1995-01-25 | 1999-10-26 | Discovision Associates | Apparatus for moving a carriage assembly from an initial position to a target position |
| US6069857A (en) | 1991-02-15 | 2000-05-30 | Discovision Associates | Optical disc system having improved circuitry for performing blank sector check on readable disc |
| US6141300A (en) | 1989-06-20 | 2000-10-31 | Discovision Associates | Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same |
| US6236625B1 (en) | 1991-02-15 | 2001-05-22 | Discovision Associates | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same |
| US6434087B1 (en) | 1995-01-25 | 2002-08-13 | Discovision Associates | Optical disc system and method for controlling bias coil and light source to process information on a storage medium |
| US6532199B1 (en) | 1991-02-15 | 2003-03-11 | Discovision Associates | Optical actuator assembly with lens position sensor for recording or playback |
-
1987
- 1987-04-27 DE DE19873714026 patent/DE3714026A1/en not_active Withdrawn
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141300A (en) | 1989-06-20 | 2000-10-31 | Discovision Associates | Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same |
| US6069857A (en) | 1991-02-15 | 2000-05-30 | Discovision Associates | Optical disc system having improved circuitry for performing blank sector check on readable disc |
| US6532199B1 (en) | 1991-02-15 | 2003-03-11 | Discovision Associates | Optical actuator assembly with lens position sensor for recording or playback |
| US6236625B1 (en) | 1991-02-15 | 2001-05-22 | Discovision Associates | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same |
| US6058081A (en) | 1995-01-25 | 2000-05-02 | Discovision Associates | Optical drive system having servomotor operated relative to maximum quad sum signal |
| US5875158A (en) | 1995-01-25 | 1999-02-23 | Discovision Associates | Servo control system for information storage device |
| US6087644A (en) | 1995-01-25 | 2000-07-11 | Discovision Associates | Focus capture for optical disc system including detection of quad sum signal to close focus |
| US6034364A (en) | 1995-01-25 | 2000-03-07 | Discovision Associates | Optical disc system including focus capture assembly with focus error signal circuit and method for operating same |
| US5974007A (en) | 1995-01-25 | 1999-10-26 | Discovision Associates | Apparatus for moving a carriage assembly from an initial position to a target position |
| US6243336B1 (en) | 1995-01-25 | 2001-06-05 | Discovision Associates | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal and focus capture method for use in same |
| US6266306B1 (en) | 1995-01-25 | 2001-07-24 | Discovision Associates | Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs |
| US6278665B1 (en) | 1995-01-25 | 2001-08-21 | Discovision Associates | Optical disc system including current monitoring circuit assembly having controller with improved optics module and laser driver and method for operating same |
| US6317391B1 (en) | 1995-01-25 | 2001-11-13 | Discovision Associates | Optical disc system having current monitoring circuit with improved bias coil assembly and controller for laser driver and method for operating same |
| US6418097B1 (en) | 1995-01-25 | 2002-07-09 | Discovision Associates | Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same |
| US6434087B1 (en) | 1995-01-25 | 2002-08-13 | Discovision Associates | Optical disc system and method for controlling bias coil and light source to process information on a storage medium |
| US5878015A (en) | 1995-01-25 | 1999-03-02 | Discovision Associates | Laser driver for controlling electrical current passed to a laser in an optical disc system |
| US6741529B1 (en) | 1995-01-25 | 2004-05-25 | Discovision Associates | Method and apparatus for moving carriage assembly from initial position to target position and optical disc system including same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8122 | Nonbinding interest in granting licenses declared | ||
| 8139 | Disposal/non-payment of the annual fee |