JPS60185206A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain superior erasing effect without complexing a mechanism or a circuit by arranging a magnetic flux generating part generating magnetic flux for erasing on an opposite position to a recording/reproducing magnetic head through a sheet-like magnetic recording medium. CONSTITUTION:The magnetic flux generating part 17 consisting of an iron core 18 and a coil 19 is arranged on the lower surface of a cover body 4 fitted to a case of a magnetic recording and reproducing device 1 so as to be optionally opened/closed so that the part 17 is opposed to both the end parts of the magnetic head 10 in a moving range. If a track 29b e.g. is to be erased out of recorded tracks 29a-29j on a magnetic disk 24, the magnetic head 10 is moved to the position of the track 29b and then an erasing switch is depressed, so that AC current for erasing is impressed to the coil 19 of the magnetic flux generating part 17 and erasing magnetic flux 30 formed around the iron core 18 is transmitted through a recording surface 25 of the magnetic disk 24 in the vertical direction and made to flow into the magnetic head 10 to erase a previously recorded signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a novel magnetic recording and reproducing device. For more information,
In a magnetic recording and reproducing device that performs recording and reproducing using a sheet-shaped recording medium such as a magnetic disk, it is advantageous because it does not require a complicated mechanism or circuit, and it does not require the use of a high frequency current for erasing current. It is an object of the present invention to provide a novel magnetic recording/reproducing device which is capable of obtaining an erasing effect as well as applying an erasing signal to a position where a recording signal is recorded with high precision.

Background Art and Problems Therefor, for example, the so-called AC erasure method has been generally used as a method of erasing recorded signals recorded on the magnetic layer of a magnetic recording medium formed in a sheet shape such as a magnetic disk by adding an erasure signal. It is being used. This AC erasing method applies an erasing current to a head in contact with the magnetic layer to apply a gradually attenuating magnetic field to the magnetic layer, thereby erasing recorded signals. In this case, when the head moves relative to the magnetic recording medium, a similar effect can be obtained by applying alternating current with a constant amplitude. However, in many cases, a recording/reproducing head is used as the erasing head, and due to the gap width, it is necessary to use a current having a wavelength shorter than the wavelength of the recording signal as the erasing current.

However, when a high frequency current is used as the erasing current,
Since the magnetic force of the magnetic field applied to the magnetic layer becomes weak, there is often a problem that a magnetized portion deep in the magnetic layer remains undemagnetized. Furthermore, if a high frequency current is used as the erasing current, various problems arise due to the relationship with the impedance of the head or the performance of the recording amplifier.

Therefore, as a method to solve the above-mentioned problems faced by the AC erasing method, the frequency of the erasing current applied to the magnetic layer is increased by slowing down the moving speed of the recording medium relative to the erasing head. A method has been proposed in which a current with a frequency as low as possible can be used. However, although this erasing method improves the erasing effect, it is necessary to change the moving speed of the recording medium depending on whether it is being recorded or reproduced and when it is being erased, which requires a complicated mechanism. However, various problems also arise in terms of operation.

Purpose of the Invention Therefore, the magnetic recording/reproducing device of the present invention was developed in view of the above-mentioned problems, and it does not require complicating the mechanism or circuitry, and it is necessary to use a high frequency current for erasing current. The object of the present invention is to provide a new magnetic recording/reproducing device which is capable of obtaining an excellent erasing effect without any noise and is also capable of applying an erasing signal with high accuracy to the position where a recording signal is recorded. be.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the magnetic recording and reproducing apparatus of the present invention is a magnetic recording and reproducing apparatus that performs recording and reproducing by bringing a magnetic head for recording and reproducing into contact with a sheet I-shaped magnetic recording medium. The present invention is characterized in that a magnetic flux generation section that generates magnetic flux for erasing is disposed at a position facing a magnetic head for two-write recording and reproduction, sandwiching the recording medium.

EXAMPLES Below, the details of the magnetic recording and reproducing apparatus of the present invention will be explained according to each example shown in the accompanying drawings. In each of the embodiments, the magnetic recording and reproducing apparatus of the present invention is applied as a magnetic recording and reproducing apparatus that performs recording and reproducing using a magnetic disk as a recording medium.

First Embodiment FIGS. 1 to 3 show a first embodiment 1 of the magnetic recording/reproducing apparatus of the present invention.

In the figure, reference numeral 2 denotes a pace chassis formed into a substantially rectangular shape when viewed from above, and a shaft 3 is provided at one end thereof. Reference numeral 4 denotes a lid that can be opened and closed with respect to the case in which the magnetic recording and reproducing device l is installed;
One end thereof is rotatably supported by the mark 1ib3, so that it can be moved between the position shown by the two-dot chain line in FIG. 2 and the position shown by the solid line. Reference numeral 5 designates a cassette halter formed into a substantially frame shape when viewed from above, and includes a base chassis 2 and a lid body 4.
11ij3, and one end thereof is written between the above 11ij3.
It is rotatably supported. The cassette holder 5 is rotated integrally with the lid 4 as the lid 4 is rotated to the position indicated by the two-dot chain line. Reference numeral 6 denotes a spindle disposed approximately at the center of the base chassis 2, and an engagement shaft portion 7 is integrally formed therein.

The spindle 6 is rotated by a motor (not shown) supported by the base chassis 2. A head support arm 8 is disposed near one side edge of the pace chassis 2, and its base end is rotatably supported by a pin 9. The tip of the head support arm 8 is associated with a head support arm feeding mechanism (not shown), and the tip of the head support arm 8 is moved by the head support arm feeding mechanism to pivot the pin 9. It is designed so that it can be rotated.

Reference numeral 10 denotes a magnetic head for recording and reproducing, and although its detailed structure is omitted in the drawing, it consists of a core made of a material with high magnetic permeability on which a cap is formed, and a coil wound around the core. It is integrally attached to the upper part of the head base 11. The head base 11 is attached via a head attachment piece 12 to the upper surface of the head support arm 8 at approximately the center in the longitudinal direction.

Accordingly, when the head support arm 8 is rotated as described above, the magnetic head 10 first moves between the position shown by the solid line and the position shown by the two-dot chain line in the direction shown by the arrow in the same figure, that is. It is moved in a direction perpendicular to the axis of the spindle 6. 13 is a lower guide portion provided on the upper surface of the pace chassis 2, and the lower guide portion 13 is connected to the magnetic head 1 of the head support arm 8.
0 is arranged so as to straddle the supported part.

That is, the lower guide part 13 has a vertical cross-sectional shape cut along the moving direction of the magnetic head 10 (see FIG. 1).
The magnetic head 10 and the head base 11 are formed in a substantially gate-like shape, and an elongated hole 14 is formed in the upper surface thereof so that the magnetic head 10 and the head base 11 can be accommodated and can be moved along the movement direction. has been done. Note that the upper end surface of the magnetic head 10 is located at approximately the same height as the upper end surface of the lower guide portion 13.

Reference numeral 15 denotes an upper guide section provided on the lower surface of the lid 4, which is disposed at a position facing the lower guide section 13 on the lower surface of the lid 4, and the size of its lower end surface is larger than that of the lower guide. It is formed slightly larger than the size of the upper end surface of the portion 13 (
(See Figure 2). Reference numeral 16 denotes a recessed portion formed in a substantially groove shape on the lower end surface of the upper guide portion 15. The recessed portion 16 is formed at a position substantially facing the elongated hole 14 of the lower guide portion 13, and is located on the side opposite to the spindle 6. The end of is open.

Reference numeral 17 denotes a magnetic flux generating section disposed within the recess 16 of the above-mentioned upper guide section 15, and in this embodiment, the iron core 18
and a coil 19 wound around the iron core 18. The iron core 18 in this embodiment is formed in a substantially plate shape, is provided in a substantially hanging shape from the upper surface of the four parts 16, and
The magnetic head 10 is provided so that both ends of its lower end surface are located at positions corresponding to at least both ends within the movement range of the magnetic head 10 . That is, in this embodiment, the iron core 18 is arranged so that its lower end surface covers the movement range of the magnetic head IO.

The lower end surface of the iron core 18 is located at a position slightly above the opening surface of the recess 16 on the pace chassis 2 side. 20 is an insulating sheet, and the iron core 18 is fixed to the upper guide part 15 via the insulating sheet 20.

21 is a magnetic disk cassette. The magnetic cassette 2
1 is formed into a thin housing shape, and a central opening 23.23 is formed approximately in the center of the cassette housing 22.

24 has a recording surface 25 (third
(see figure), and is rotatably housed inside the cassette housing 22, with a center core facing the central opening 23, 23 of the cassette housing 22. 26 is attached.

27 is a retaining hole formed in the center of the center core 26. Reference numeral 28.28 is a head window formed in a portion offset to one side edge of both the upper and lower surfaces of the cassette housing 22, and through this head window 28.28, the guide portions 13 and 15 on both the upper and lower sides described above are inserted into the magnetic disk. 24, and the upper end surface of the magnetic head 10 can come into contact with the recording surface 25.

Thus, the magnetic disk cassette 21 is set in a predetermined position of the magnetic recording/reproducing apparatus 1 while being mounted and held in the cassette holder 5 described above. When the magnetic disk cassette 21 is set at a predetermined position, the retaining hole 27 formed in the center core 26 of the magnetic disk 24 is engaged with the engagement shaft portion 7 of the spindle 6, and thereby the spindle 6 It is in a state where it can rotate integrally with. At the same time, the upper end surface of the magnetic head 10 is brought into contact with the recording surface 25 of the magnetic disk 24, and an upper guide portion 15 is provided from the upper surface side to the area around the portion of the magnetic disk 24 that is in contact with the magnetic head 10. The lower end surface of the lower guide part 13 is lightly contacted, and the upper end surface of the lower guide part 13 is brought into contact with the eave from the lower side surface. Thus, the magnetic disk 24 is rotated with the portion around the portion in contact with the magnetic head 10 being prevented from swinging in a direction perpendicular to the plane of the magnetic layer by the upper and lower guide portions 13 and 15. It is said that

Therefore, the magnetic flux generating section 17 described above is connected to the magnetic disk 2.
4 is placed in a predetermined position as described above, it comes to a position where it sandwiches the magnetic disk 24 and faces the magnetic head 10 for recording and reproducing.

Then, when a recording or reproducing operation is started, the magnetic disk 24 is rotated and, depending on the case, the head support arm 8 is rotated. A predetermined recording or playback position is accessed. When the magnetic head 10 reaches the predetermined recording or reproducing position, recording or reproducing is performed while the magnetic head 10 scans the track.

Erasing by the magnetic recording/reproducing apparatus 1 constructed as described above is carried out as follows (see FIG. 3). In addition, in FIG. 3, the blacked out portions 29a, 29b, 2 of the recording surface 25 of the magnetic disk 24 are
9C, +1·0129j, . . . indicate tracks on which recording signals have already been recorded, that is, recorded racks. Therefore, first, the magnetic head 10 is moved to the recorded track 29a.
, 29b, 29c, Φ･ｲ, 29j, and ＠进. to the position of the track you want to erase. For example, if you want to erase the record on rack 29b (recorded), 1,
The magnetic head 10 is moved to the position of the track 29b. When an erase switch (not shown) that commands an erase operation provided in the magnetic recording/reproducing device 1 is operated, an alternating current for erasing is applied to the coil 19 of the magnetic flux generating section 17, and a magnetic field is formed in the iron core 18. . This generates magnetic flux for erasing. And leakage magnetic flux 30 emitted from the magnetic field
A large part of the flow is drawn into the recording/reproducing magnetic head IO as shown by the broken line arrow in FIG. That is, most of the leakage magnetic flux 30 emitted from the magnetic flux generating section 17 passes through the recording surface 25 of the magnetic disk 24 in a direction substantially perpendicular to the recording surface 25 and flows to the magnetic head IO. Therefore, an erasing signal at a constant frequency is applied to the portion of the recorded track 29b that is in contact with the magnetic head 10, thereby erasing the previously recorded recording signal. Therefore, when the magnetic disk 24 rotates once in this state, the recorded signal on the recorded track 29b is erased. Furthermore, when you want to erase any other recorded track (for example, when you want to erase the recorded track 29h), move the magnetic head 10 to the recorded track 29h.
Move to position 16 and operate the erase switch as described above. Then, most of the leakage magnetic flux coming out of the magnetic flux generating section 17 flows into the recording/reproducing magnetic head 10 as shown by the two-dot chain arrow in FIG. That is, this time it flows through the recorded track 29h. As a result, the recorded track 29h is erased.

In the portion of the recording surface 25 through which the leakage magnetic flux 30 is transmitted as described above, the direction of the magnetic pole of the magnetic material, that is, the magnetic powder is substantially perpendicular to the track direction.

Second Embodiment FIG. 4 shows a second embodiment IA of the magnetic recording/reproducing apparatus of the present invention. The magnetic flux generating section 17 in the first embodiment 1 described above was fixedly provided at a predetermined position of the magnetic recording and reproducing device 61, but the magnetic flux generating section in this second embodiment IA was fixedly provided at a predetermined position of the magnetic recording and reproducing device 61. 'iJIA is movably provided.

Note that the same parts as those in the first embodiment described above or parts having similar functions will be designated by the same reference numerals as in the first embodiment, and a description thereof will be omitted.

In the figure, 31 is a head support. The spatula 1ζ support 31 includes a lower carriage 32a and an upper carriage 3.
The second carriage 32b is connected to the lower carriage 32 via a connecting shaft 33 at its base end.
The frame is rotatably connected to the rear end of a and the lower carriage 32a is connected to the lower carriage 32a.
An elastic force is applied to move the tip part a toward the distal end side. The head support 31 is attached to the lower carriage 3
By inserting the guide 11!1II35 into the not-illustrated guide hole of 2a, it is movably supported by the guide @35 and is guided in its moving direction by the guide shaft 35.

The head support 31 can be moved between a position shown by a solid line and a position shown by a two-dot chain line in FIG. 4 by a head feeding mechanism including a stepping motor and a lead screw (not shown).

Reference numeral 36 denotes a cassette carrier, which is in a non-loading position above the position shown in FIG. 4 when the magnetic disk cassette 21 is not installed in it, and is in the non-loading position above the position shown in FIG. 4 when the magnetic disk cassette 21 is installed in it. It is loaded to the position shown.

Note that the carriage 32 above the head support 31 described above
A projecting piece (not shown) is formed on b, the tip of which is placed in elastic contact with the upper surface of the cassette carrier 36. Therefore, the upper carriage 32b is in the non-loading position 1 when the cassette carrier 36 is in the above-mentioned non-loading position.
17 has its protruding piece pressed toward the child by the cassette carrier 36, so that its tip is positioned above the position shown in FIG. 4, and the cassette carrier 36 When it reaches the position shown in FIG. 4, it is brought to the position shown in FIG. 4 by the tensile force of the tension spring.

Reference numeral 37 denotes a magnetic head for recording and reproducing provided at the tip of the upper surface of the lower carriage 32a, and is configured in the same manner as the magnetic head 10 in the first embodiment.
8 indicates a helad base.

Reference numeral 39 denotes four parts formed on the lower surface of the tip of the upper carriage 32b at a position facing the magnetic helad 37;
A substantially cylindrical suppressing member 40 made of a material such as fel is fitted into the recess 39 .

Reference numeral 41 denotes a magnetic flux generating section disposed in the fourth section 39 formed at the tip of the upper carriage 32b. 42 is an iron core, and 43 is a coil wound around the iron core 42.

The iron core 42 in this embodiment is formed into a substantially pin shape, and its lower end is positioned within the hole of the pressing member 40. The lower end of the iron core 42 is positioned above the lower opening of the hole of the suppressing member 40.

When the magnetic tape cassette 21 is set in a predetermined position as shown in FIG. 4, the tip of the magnetic head 37 comes into contact with the recording surface 25 of the magnetic disk 24, and The suppressing member 40 is brought into contact with the portion where the magnetic head 37 is brought into contact from below. Therefore, the recording or reproducing operation in the magnetic recording/reproducing apparatus IA configured as described above is also performed in the same manner as in the first embodiment described above.

Erasing in this embodiment IA is performed as follows. First, in the same manner as described above, the magnetic head 37 is moved to the position of the recorded track to be erased. This is done by moving the head support 31. Then, the magnetic flux generating section 41 is also moved integrally with the magnetic head 37, and comes to a position facing the magnetic head 37 with the recorded (recorded) rack sandwiched therebetween. Therefore, when the erasing operation is started, an alternating current for erasing is applied to the coil 43, thereby a magnetic field is formed in the magnetic flux generating section 41, and most of the leakage magnetic flux from the magnetic field is absorbed as described above. Similarly, the light passes through the portion of the recorded track that is in contact with the magnetic head 37 and flows so as to be drawn into the magnetic head 37. As a result, the recorded signal on the recorded track is erased.

As described above, in the magnetic recording and reproducing apparatus IA shown in the second embodiment, the magnetic flux generating section 41 that generates magnetic flux for erasing is moved to the position where the magnetic helad 37 for recording and reproducing is moved. It is configured as follows. Therefore, the size of the lower end of the iron core 42 in the magnetic flux generating section 41 does not need to be large enough to cover the entire movement range of the magnetic head 37.

In addition, as a means for moving the magnetic flux generating section to a position where the magnetic head for recording and reproducing has been moved, in the second embodiment, a moving body is used in which the magnetic flux generating section and the magnetic head for recording and reproducing are moved together. However, in some cases, the magnetic flux generating section and the magnetic head for recording and reproducing are supported by separate moving bodies, and the magnetic flux generating section and the magnetic head for recording and reproducing are supported only when erasing is to be performed. It is also conceivable that the magnetic head be configured to be moved to a position 1δ.

Third Embodiment FIG. 5 shows a third embodiment IB of the magnetic recording/reproducing apparatus of the present invention.

In the figure, 44 indicates a case of the device, and the case 44
Inside, there are necessary mechanisms such as a magnetic disk 45 for recording and reproducing, a head support member 46 that supports it, a cassette holder for holding the magnetic disk 24 stored therein, and a spindle. It is provided.

Reference numeral 47 denotes a magnetic flux generating section formed in a substantially forest shape, and the magnetic flux generating section 47 in this embodiment IB is constituted only by a substantially rod-shaped member made of a material with high magnetic permeability. and,
The lower part 47a of the magnetic flux generating section 47 is formed in a widening manner, so that it can cover the entire movement range of the magnetic head 45 for recording and reproducing. Thus, the magnetic flux generating section 47 is disposed at a position 117 so that its lower ☆:jH surface sandwiches the magnetic disk 24 and faces the moving range of the magnetic head 45, and its upper end is formed in the case 44. It is provided so as to protrude from the hole 48 toward the compatible side.

Therefore, the magnetic recording/reproducing apparatus I shown in this third embodiment
Erasing in B is performed as follows. First, the above-mentioned 1. In the same manner as in the second embodiment, the recording/reproducing magnetic head F' 45 is moved to the position of the recorded track to be erased.

Therefore, terminals 50 and 50 of a suitable eraser 49 are brought into contact with the two ends of the magnetic flux generating section 47. Then, the erasing magnetic flux generated inside the demagnetizer 49 flows through the magnetic flux generating section 47 and reaches the lower end surface of the magnetic flux generating section 61147, and then flows from the lower 'J:IA surface toward the magnetic head 45. Become. An erase signal is then applied to the recorded track, thereby erasing the recorded signal.

In this manner, in the magnetic recording/reproducing apparatus of the present invention, the erasing magnetic flux generated from the magnetic flux generating section can also be taken in from outside the apparatus δ.

Example of Operation FIG. 6 shows an example of an erasing operation by the magnetic recording/reproducing apparatus of the present invention. In the figure, 51 is the track core 0-7.
The output terminal of the track controller 1 is connected to a head moving motor 52 and an erase switch 53. Reference numeral 54 denotes a magnetic flux generating section that generates magnetic flux for erasing, and is composed of an iron core 55 and a coil 56 wound around the iron core 55, and one terminal of the coil 56 is used for applying erasing current. It is connected to one terminal of the power supply section 57, and the other terminal of the coil 56 is connected to the other terminal of the power supply section 57 via the erase switch 53. Incidentally, this magnetic flux generating section can be applied as the magnetic flux generating section 17 in the first embodiment or the magnetic flux generating section 41 in the second embodiment. Reference numeral 58 denotes a recording/reproducing head, which is moved in a predetermined direction by the head moving motor 52 described above. Reference numeral 59 indicates an input operation section provided in the magnetic recording/reproducing device.

Therefore, the track numbers of a desired number of recorded tracks to be erased are selectively input into the track controller 51 in advance. This operation is input by operating a so-called numeric keypad or the like provided on the input operation section 59, for example. Then, the erase operation start command is sent to the track controller 5.
Enter 1. Input operation section 59 for this erase operation start command
It suffices if the input is made by operating a predetermined key provided on the screen. Then, an operation command is output to the head moving motor 52 until the position of the track controller rack is reached, and when the magnetic head 58 reaches the position of the selected track, the magnetic disk 24 is rotated, and the erase switch 53 is turned on. Outputs operation commands. Then, since the erase switch 53 is turned on, an erase current is supplied from the power supply section 57 to the coil 56. Therefore, the above-described erasing magnetic flux is generated from the magnetic flux generating section 54, and the magnetic flux passes through the magnetic disk 24 and flows to the magnetic head 58. As a result, the recorded signal of the i-rack that the magnetic head 58 is in contact with is erased. Then, when the erasing for the track is completed, the track controller 51 releases the operation command for the erasing switch 53 and moves the magnetic head 58 to the next selected track position again.
An operation command is output to the motor 52 for moving the head.

In this way, when the magnetic head 58 reaches the position of a preselected track, the erase switch 53 is turned on, and erasing for that track is automatically executed.

Effects of the Invention As is clear from the above description, the magnetic recording and reproducing apparatus of the present invention is a magnetic recording and reproducing apparatus that performs recording and reproducing by bringing a magnetic head for recording and reproducing into contact with a sheet-shaped magnetic recording medium. A magnetic flux generating section that generates an erasing magnetic flux is disposed at a position 16 facing the recording/reproducing magnetic head while sandwiching the recording medium. Therefore, the magnitude of the erasing magnetic flux generated from the magnetic flux generating section The portion flows through the magnetic recording medium in a direction substantially perpendicular to the recording surface thereof and is drawn into a magnetic head for recording and reproduction. Therefore, the magnetic pole direction of the portion of the recording surface of the magnetic recording medium through which the erasing magnetic flux is passed is set to be approximately perpendicular to the direction of the cap of the magnetic head for recording and reproducing.
Extremely effective erasure can be performed. Moreover, since the width of the contact between the magnetic head for recording and reproduction with the recording surface is significantly larger than the gap width of a normal head, even if a relatively low frequency erasing current is applied, a high frequency erasing current is applied to the normal head. The same effect can be obtained by applying . Therefore, according to the present invention, a low frequency current can be used as the erasing current.

By using a low-frequency current as the erasing current, it is possible to generate a strong erasing magnetic flux, so that it is possible to erase deep into the magnetic layer.

In the present invention, the magnetic head for recording and reproducing is used as it is as a member through which magnetic flux for erasing passes through, and a simple structure consisting of an iron core member or the like is provided at a position facing the magnetic head for recording and reproducing. Since the magnetic flux generating parts are arranged, the mechanism does not become complicated. Further, as described above, since there is no need to use a high frequency current as the erasing current, the circuit configuration can be made extremely simple.

Furthermore, since the magnetic flux for erasing concentrates on the part of the magnetic recording medium that is in contact with the recording/reproducing magnetic head, there is no problem such as misalignment between the recording track and the erasing track. , From this point as well, a highly accurate erasing effect can be obtained. However, according to the present invention,
Excellent erasing effects can be obtained without complicating the mechanism or circuit, and there is no need to use a high frequency current for erasing, and the erasing signal can be accurately moved to the position where the recording signal was recorded. It is possible to provide a novel magnetic recording/reproducing device that can apply a good voltage.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the magnetic recording and reproducing apparatus of the present invention, in which FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along line A-A in FIG. 1. 3 is a sectional view showing an enlarged main part to explain the operation, FIG. 4 is a vertical sectional view showing a second embodiment of the magnetic recording and reproducing apparatus of the present invention, and FIG. FIG. 6 is a perspective view conceptually showing a third embodiment of the magnetic recording/reproducing apparatus, and a circuit diagram for explaining an example of an erasing operation by the magnetic recording/reproducing apparatus of the present invention. Explanation of symbols 1, IA, IB...Magnetic recording and reproducing device, 10...Magnetic head, 17...Magnetic flux generation unit, 24...Magnetic recording medium, 37...Magnetic head, 47... Magnetic flux generation section, 54.
...Magnetic flux generation section, 58...Magnetic head

Claims (1)

[Claims] In a magnetic recording and reproducing device that performs recording and reproducing by bringing a magnetic head for recording and reproducing into contact with a sheet-shaped magnetic recording medium,
A magnetic recording and reproducing device, characterized in that a magnetic flux generation unit that generates magnetic flux for erasing is disposed at a position facing the magnetic head for recording and reproducing, sandwiching a magnetic recording medium.