JP2001175816A - Memory card adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely read and write recording data out of and to plural mem ory cards by using a general recording and reproducing device. SOLUTION: An adapter body 11 which is formed having nearly the same specifications with a disklike recording medium larger than a memory card 1 is provided with card loading parts 13 where memory cards 1 are loaded detachably, a 1st means which reads information out of the memory cards 1 loaded in the card loading parts 13, and a 2nd means which converts the information read out of the memory cards 1 so that it can be read out as recording information of the disklike recording medium. The external information readout position of the 2nd means is provided at the position of the adapter body 11 corresponding to the recording surface of the disklike recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory capable of reading a memory card configured to record various data such as music signals, image data, and the like using a built-in IC by an existing recording / reproducing apparatus. Regarding card adapter.

[0002]

2. Description of the Related Art In recent years, memory cards have been developed and used as recording media for various kinds of data, but a dedicated reproducing device is required for reading the data.

Therefore, as a means for reading data from a memory card with an existing optical disk reproducing device,
For example, a memory card adapter disclosed in JP-A-10-340320 has been proposed.

[0004] This memory card adapter is a CD-RO
A memory card is loaded into a housing having the same outer shape and dimensions as the cartridge containing the M disk, and data read from the memory card is read by an optical head of an optical disk reproducing device through an optical modulation element provided in the housing. I have.

[0005]

The above-mentioned memory card adapter incorporates a transparent dummy disk which is rotated by a drive device instead of a CD-ROM disk when the memory card adapter is loaded into an optical disk reproducing device, and is provided with an optical head. Is applied to the optical modulation element fixedly mounted in the housing through the dummy disk, so that the position of the data reading surface of the existing CD-ROM disk is different from that of the optical modulation element. It is expected that the reading accuracy by the optical head will decrease.

Further, since the proposed memory card adapter is for loading a single memory card, the amount of data that can be read is determined by the capacity of the memory card.

[0007] The present invention has been made in view of such a situation, and it is possible to accurately read recorded data from a plurality of memory cards using an existing reproducing apparatus, and to read a large amount of data. It is an object of the present invention to provide a memory card adapter excellent in compatibility and versatility, which can realize the following.

[0008]

SUMMARY OF THE INVENTION To solve this problem, a memory card adapter according to the present invention has an adapter body formed to have the same specifications as dimensions of a disk-shaped recording medium larger than a memory card. A plurality of card mounting sections for removably mounting the memory card; first means for reading information from the memory card mounted on the card mounting section; and information read from the memory card. Second means for converting the information into a state readable to the outside as the recording information of the disk-shaped recording medium, and the external information reading position of the second means is recorded on the disk-shaped recording medium. It is provided at the position of the adapter body corresponding to the surface.

Thus, information can be read from a plurality of memory cards with high accuracy by using a reproducing apparatus generally used for a disk-shaped recording medium, and by using a plurality of memory cards, a large amount of information can be obtained. It is possible to read data of a capacity.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention has an adapter body formed to have the same specifications as the dimensional specifications of a disk-shaped recording medium larger than a memory card, and the adapter body is provided with the memory card. A plurality of card mounting units for removably mounting a memory card; first means for reading information from a memory card mounted in the card mounting unit;
A second means for converting information read from the memory card into a state readable to the outside as recorded information on the disk-shaped recording medium, and reading the external information from the second means. A position is provided at a position of the adapter main body corresponding to a recording surface of the disk-shaped recording medium.

According to this, information can be read from a plurality of memory cards by using an existing reproducing apparatus generally used for a disk-shaped recording medium.
In this case, since the external information reading position of the second means is provided at the position of the adapter main body corresponding to the recording surface of the disk-shaped recording medium, the reading focal position of the memory card adapter and the general purpose And the reading focal point of the disc-shaped recording medium substantially coincides. Therefore, information can be read out to the outside via the second means with the same accuracy as reading data from a general-purpose disc-shaped recording medium.

According to a second aspect of the present invention, in the first aspect of the invention, the second means stores information which is externally written into the memory card adapter as information recorded on the disk-shaped recording medium. It further has a function of reading and converting it into a state in which it can be written as record information on the memory card, wherein the first means is converted into a state in which it can be written as record information on the memory card by the second means. And a function of writing the information to the memory card.

According to this, information can be written to a plurality of memory cards by using an existing recording / reproducing apparatus which is generally used for a disk-shaped recording medium. Information can be written via the signal conversion means with the same precision as writing data to the disk-shaped recording medium.

According to a third aspect of the present invention, in the first or second aspect, the existing recording medium is a CD (compact disk). Information can be read from and written to the memory card using the device.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the plurality of card mounting portions are distributed at equal intervals in a circumferential direction. Using a recording / reproducing device for CD, it is possible to read and write information from many memory cards,
Memory card can be attached to the adapter body in a well-balanced manner,
When the memory card adapter is loaded in the recording / reproducing apparatus, the posture of the memory card adapter is easily stabilized, and the reading / writing accuracy of the signal is improved accordingly.

According to a fifth aspect of the present invention, in the first or second aspect, the existing recording medium is a floppy disk (FD). The recording data can be read from and written to the memory card using the device.

According to a sixth aspect of the present invention, in the first or second aspect, the existing recording medium is an MD (mini-disc).
Information can be read from and written to a memory card by using a recording / reproducing apparatus.

According to a seventh aspect of the present invention, in the first or second aspect, the existing recording medium is an MO (magnet optical) disk,
According to this, information can be read from and written to the memory card using the recording / reproducing apparatus for the MO disk.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, the card mounting portions are formed so as to vertically overlap each other in the thickness direction of the adapter body for each pair. According to this, MО is twice as thick as a memory card, and a large number of memory cards can be mounted in a small space by using this thickness.

According to a ninth aspect of the present invention, in accordance with the eighth aspect of the present invention, the upper and lower memory cards are arranged so that the upper and lower memory cards are displaced in the plane direction. Thus, many memory cards can be mounted in a small space, and each memory card can be easily attached and detached. Furthermore, by disposing the upper and lower memory cards in the plane direction and disposing the upper and lower card mounting parts,
A means for reading and writing a memory card (first means) can be easily arranged in these card mounting portions.

According to a tenth aspect of the present invention, in the invention according to any one of the first to ninth aspects, the entire surface of the memory card held by the card mounting portion is exposed from the adapter body. According to this, the contents of the recorded data can be easily recognized from the display written on the surface of the memory card.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 13A and 13B show an example of a memory card 1 to be stored in the present invention.
This memory card 1 is resin-molded into a rectangular plate having a length and width of about 30 mm × 20 mm and a thickness of about 2 mm. Data is stored in a built-in IC on the back of the front end. Two input / output terminals for input / output are provided in parallel, and a slide claw 3 for preventing writing and erasing of data is provided on one side. A label 4 is attached to the surface of the memory card 1, and
The label 4 is provided with a mark 5 for supporting the insertion direction. An inclined cut portion 6 for preventing erroneous insertion is formed at the right corner of the front end side, and a left and right side of the back surface of the memory card 1 is inserted into a card insertion hole of a device using the memory card 1. Guide groove 7 for guiding when inserting
Are formed as paragraphs. Further, a claw groove 8 is formed at a rear end portion of the front surface of the memory card 1 to facilitate removal from a device or the like.

Some embodiments of the memory card adapter A for loading the memory card 1 will now be described.

(First Embodiment) FIGS. 1 to 3 show a first embodiment of a memory card adapter A according to the present invention. The memory card adapter A of this example is configured according to the CD specification.
It comprises a disk portion 11A having the same outer diameter as the outer diameter of D and a hub 11B having a center hole 12 having the same size as that of the CD, and the disk portion 11A and the hub 11B are rotatably rotatable via a bearing portion 11C. They are connected to form a single disk. The rectangular card mounting portions 13 are radially cut out at a plurality of positions (six in the example) in the circumferential direction of the outer disk portion 11A at equal intervals.

The width of each card mounting section 13 is set to be the same as the width of the memory card 1, and
3 is set to be slightly larger than the vertical length of the memory card 1, and further, on the left and right sides of the card mounting portion 13, guide rails 14 that fit into the guide grooves 7 of the memory card 1 are provided.
Are formed so as to protrude, and the guide grooves 7 are formed in the left and right guide rails 14.
While inserting the memory card 1 into the adapter body 1
1 is configured to be inserted and removed from the outer peripheral opening. At the far end of the card mounting portion 13, a group of connector terminals 15 which are in contact with and conductive to a group of input / output terminals 2 on the back of the mounted memory card 1 are provided. Further, the card mounting unit 13
An inclined corner 16 corresponding to the inclined cut portion 6 of the memory card 1 is formed at the right corner at the back end of the memory card 1. When the memory card 1 is correctly inserted, the entire memory card 1 is within the outer diameter of the adapter body 11. If the memory card 1 is inserted in the reverse direction or the left or right direction, the memory card 1 protrudes from the adapter body 11 so that an error in the insertion direction can be easily recognized.

The card mounting section 13 and the memory card 1
Is set to such an extent that the memory card 1 is prevented from coming out arbitrarily by friction at the fitting portion. Further, since the entire surface of the memory card 1 holding the memory card adapter A is exposed to the surface of the memory card adapter A, it is easy to appropriately write data, a serial number, and the like on the label 4 as needed. The recorded contents can be recognized.

On the surface of the disk section 11A of the adapter body 11, an optical modulation element 17A for converting data taken from the memory card 1 into a state that can be read by an optical disk reproducing device is provided along a radial direction. A circuit for reading data output from the card 1 via the connector terminal group 15, a circuit for converting the read data to an optical modulation signal, and a power supply are built in the disk unit 11A. The circuit and the power supply are referred to as a circuit device group 18 as a disk unit 11A.
It is built in. In this embodiment, a circuit for reading data from the memory card, the connector terminal group 15 and the power supply constitute first means in the claims, and a circuit for converting the read data to an optical modulation signal. , The optical modulation element 17A and the power supply constitute a second means.

When the memory card adapter A configured as described above is loaded into the optical disk reproducing device, the hub 11B
Is positioned and clamped on a turntable 21 of the optical disk reproducing apparatus, and the clamp 2 of the optical disk reproducing apparatus is
2 and the hub 11B rotates with the drive of the turntable 21. At this time, only the hub 11B rotates,
The disk portion 11A supported by the hub 11B via the bearing portion 11C stops without rotating.

The optical head 23 provided in the optical disk reproducing apparatus moves at a constant speed toward the outer periphery while irradiating the optical modulation element 17A with a laser beam, and transmits the reflected light data from the optical modulation element 17A. Read it.

In order to read the reflected light data from the optical modulator 17A, it is necessary to accurately align the optical modulator 17A with the optical head 23. Such alignment may be performed by an operator when loading a CD-shaped memory card adapter into the playback device.

Next, details of the actual reading operation will be described with reference to FIG. Note that MPU2 in FIG.
The RAM 4 and the RAM 25 constitute a circuit for reading data from the above-mentioned memory card, and the encoder 26 and the voltage amplifier 27 constitute a circuit for converting the read data into an optical modulation signal.

As shown in FIG. 3, the data extracted from each memory card 1 is read by the MPU 24 built in the disk unit 11A and stored in the RAM 25. Thereafter, the data taken out of the RAM 25 is EFM-modulated by the encoder 26, and then sent out to the voltage amplifier 27. Based on the read out data, an alternating voltage is applied to the electrode of the optical modulation element 17A, and the refractive index changes. Is done. Although not shown, a reflective surface is formed on the entire back surface of the optical modulation element 17A, and a transparent protective layer is formed on the entire surface of the optical modulation element 17A.

As described above, the optical head 23 sequentially reads the change in the refractive index of the optical modulation element 17A, whereby the data taken out of the memory card 1 is read.

In this case, it is preferable that only an arbitrary one of the plurality of memory cards 1 can be read, or that the reading order can be set arbitrarily. If a heavy object such as a metal ring is attached to the outer periphery of the disk portion 11A, the disk portion 11A can be fixed without following the rotation of the hub 11B. Further, by making the circumferential width of the optical modulation element 17A as large as possible, it is possible to prevent the optical head 23 from falling off the trace locus.

Further, since the reading surface of the optical modulation element 17A is arranged at the position of the disk portion 11A corresponding to the recording surface of the CD, the optical head 23 is completely different from the focal position when reading information from a normal CD. The information of the adapter main body 11 can be read from the focal position, and the reading accuracy is correspondingly high.

(Embodiment 2) FIGS. 4 and 5 show a second embodiment of the memory card adapter A according to the present invention. The memory card adapter A of this example is configured according to the FD specification, and its adapter body 11
The resin is molded so that the vertical and horizontal dimensions and thickness are the same as those of the cartridge 32 in the FD 31 shown in FIG. 6, and a plurality of locations along the outer periphery (five locations in the example).
, A rectangular card mounting portion 13 is recessed and
It is configured so that one memory card 1 can be inserted.

The width of each card mounting section 13 is set to be the same as the width of the memory card 1, and
3 is set to be slightly larger than the vertical length of the memory card 1, and further, on the left and right sides of the card mounting portion 13, guide rails 14 that fit into the guide grooves 7 of the memory card 1 are provided.
Are formed so as to protrude, and the guide grooves 7 are formed in the left and right guide rails 14.
While inserting the memory card 1 into the adapter body 1
1 is configured to be inserted and removed from the outer peripheral portion. At the far end of the card mounting section 13, the mounted memory card 1 is inserted.
Connector terminal 15 that makes contact with the input / output terminal group 2 on the back side
Groups have been deployed. Further, an inclined corner portion 16 corresponding to the inclined cut portion 6 of the memory card 1 is formed at the right corner at the far end of the card mounting portion 13, and the memory card 1 is inserted to a predetermined position only in a correct posture. You can do it.

A slide shutter 34 similar to the slide shutter 33 mounted on the cartridge 32 of the FD 31 shown in FIG.
Is mounted so as to be slidable and can be freely opened and closed, and a magnetic modulation element 17B is fixedly provided inside an opening 35 hidden by the slide shutter 34. The magnetic modulation element 17B is provided at a position equivalent to the recording surface on a disk mounted in the FD 31, and the memory card adapter A
When the is mounted on the FD device, the magnetic head accurately faces the magnetic modulation element 17B.

Further, a circuit for reading data output from the memory card 1 via the connector terminal group 15, a circuit for converting the read data into a signal for magnetic modulation, and a power supply are built in the adapter body 11. ing. These circuits and power supply are incorporated in the adapter main body 11 as a circuit device group 18. FD3
The reading surface of the magnetic modulation element 17B is arranged at the position of the adapter main body 11 corresponding to one recording surface.

In this embodiment, the circuit for reading data from the memory card, the connector terminal group 15 and the power supply constitute the first means in the claims, and convert the read data into a signal for magnetic modulation. The circuit, the magnetic modulation element 17B and the power supply constitute a second means.

As shown in FIG. 7, if the slide shutter 34 is eliminated, a memory card adapter A capable of mounting up to seven memory cards 1 can be constructed.

(Embodiment 3) FIGS. 8 and 9 show a third embodiment of the memory card adapter A of the memory card 1 according to the present invention. The memory card adapter A in this example is configured to the MO disk specification.
The adapter main body 11 is resin-molded so that the vertical and horizontal dimensions and the thickness are the same as those of the MO disk 41 shown in FIG. 10, and is rectangularly formed at a plurality of places (three places in the example) along the rear edge. The two upper and lower card mounting portions 13 formed in a shape are recessed and formed so that up to six memory cards 1 can be mounted.

The width of each card mounting section 13 is set to be the same as the width of the memory card 1, the depth of the upper card mounting section 13 is set to be sufficiently larger than the vertical length of the memory card 1, and the lower card mounting section 13 is set. Is set to be slightly larger than the vertical length of the memory card 1, and even if the memory card 1 is inserted and held in the upper and lower card mounting portions 13 respectively, the claw catching groove 8 of the lower memory card 1 is exposed, and the lower memory is exposed. The card 1 can be taken out first. Guide rails 14 that fit into the guide grooves 7 of the memory card 1 protrude from the left and right sides of the card mounting portion 13, and the guide grooves 7 are fitted and guided by the left and right guide rails 14. The adapter body 11
It is configured to be inserted and removed from the outer peripheral portion of. At the far end of the card mounting portion 13, a group of connector terminals 15 which are in contact with the group of input / output terminals 2 on the back surface of the mounted memory card 1 are provided. Further, an inclined angle portion 16 for preventing erroneous insertion is formed at the right corner at the far end of each card mounting portion 13 corresponding to the inclined cut portion 6 of the memory card 1.

A slide shutter 44 similar to the slide shutter 43 mounted on the cartridge 42 of the MO disk 41 shown in FIG.
Inside the opening 45 hidden by the slide shutter 44, the magneto-optical modulator 17C is fixedly provided. The magneto-optical modulator 17C is provided at a position equivalent to the recording surface of a disk mounted on the MO disk 41,
When the memory card adapter A is loaded in the playback device for an MO disk, the optical head accurately faces the magneto-optical modulator 17C.

In this example, a circuit for reading data output from the memory card 1 via the connector terminal group 15
A circuit for converting the read data into a signal for magneto-optical modulation and a power supply are incorporated in the adapter body 11. These circuits and power supplies are
Is built into the adapter body 11. Also, M
The reading surface of the magneto-optical modulator 17C is arranged at the position of the adapter body 11 corresponding to the recording surface of the O disk 41.

In this embodiment, a circuit for reading data from the memory card, the connector terminal group 15 and the power supply constitute first means in the claims, and convert the read data into a signal for magneto-optical modulation. The second means is constituted by the circuit to perform, the magneto-optical modulation element 17C, and the power supply.

Also in this example, if the slide shutter 44 is omitted, a configuration in which more memory cards 1 can be mounted can be provided.

(Embodiment 4) FIG. 11 shows a fourth embodiment of the memory card adapter A of the memory card 1 according to the present invention. Memory card adapter A of this example
The adapter main body 11 has the vertical and horizontal dimensions and the thickness of the MD 51 shown in FIG.
The resin is molded so as to be the same as the cartridge 52, and rectangular card mounting portions 13 are formed in two places along one side.

The width of each card mounting section 13 is set to be the same as the width of the memory card 1 and the card mounting section 1
The depth of the memory card 1 is set slightly larger than the vertical length of the memory card 1, and guide rails 14 that fit into the guide grooves 7 of the memory card 1 protrude from both sides of the card mounting portion 13. 14, the memory card 1 is inserted into the adapter body 11 while the guide groove 7 is fitted and guided.
It is configured to be inserted and removed from the outer peripheral portion of. At the far end of the card mounting portion 13, a group of connector terminals 15 which are in contact with and conductive to a group of input / output terminals 2 on the back of the mounted memory card 1 are provided. Further, a slanted corner 16 for preventing erroneous insertion is formed at the right corner at the far end of each card mounting part 13 corresponding to the slanted cut part 6 of the memory card 1.

The adapter body 11 has a slide shutter 5 similar to the slide shutter 53 mounted on the cartridge 52 of the MD 51 shown in FIG.
4 is slidably opened and closed, and a first shutter is inserted into an opening 55 hidden by the slide shutter 54.
A magneto-optical modulator 17D similar to the example is fixedly provided. The magneto-optical modulator 17D is provided at a position equivalent to the recording surface of a disk mounted in the MD 51.
When the memory card adapter A is loaded in the MD playback device, the optical head is accurately opposed to the magneto-optical modulator 17D.

In this example, a circuit for reading data output from the memory card 1 through the connector terminal group 15
A circuit for converting the read data into a signal for magneto-optical modulation and a power supply are incorporated in the adapter body 11. These circuits and power supplies are
Is built into the adapter body 11. Also, M
The reading surface of the magneto-optical modulator 17D is arranged at the position of the adapter body 11 corresponding to the recording surface of the D disk 51.

In the present embodiment, the circuit for reading data from the memory card, the connector terminal group 15 and the power supply constitute first means in the claims, and convert the read data into a signal for magneto-optical modulation. The second means is constituted by the circuit to perform, the magneto-optical modulator 17D, and the power supply.

Also in this example, if the slide shutter 54 is omitted, a configuration in which more memory cards 1 can be mounted can be provided.

In the above-described embodiments, the memory card 1 is inserted and removed along the surface thereof so as to be fitted and held in the card mounting portion 13. It is also possible to adopt a configuration in which a press-fitting is performed from above in a surface direction to elastically fit and hold.

Further, in the memory card adapter A of the MO specification having a thickness capable of holding two memory cards 1 in an overlapping manner, the card mounting portion 13 is provided on the front and back surfaces of the adapter body 11.
Can be formed respectively, and two memory cards 1 can be overlapped and held back to back.

As means for preventing the held memory card 1 from slipping out, in addition to utilizing the fitting frictional force as described above,
If a small projection over which the inserted memory card 1 elastically rides over is formed at the entrance of the card mounting portion 13, it is possible to more reliably prevent the memory card 1 from coming out.

In the above-described embodiment, the case where only reading from the memory card 1 is performed has been described as an example. However, if the configuration is such that writing to the memory card 1 can also be performed, it can be used more conveniently. In that case, the following function may be added to each component constituting the first and second means. That is,
The function of reading information written to the memory card adapter 11 from outside as recording information of a CD, FD, MО disk, or MD on each component constituting the second means, and the read information can be written as recording information of a memory card. Add function to convert to state. The reading function in this case may be added to the additional optical modulator 17A, the magnetic modulator 17B, and the magneto-optical modulators 17C and 17D. Further, each of the components constituting the first means includes:
A function of writing the information converted into a writable state as the recording information of the memory card 1 to the memory card 1 is added.

[0059]

As described above, according to the memory card adapter of the present invention, a plurality of memory cards are mounted on an existing disk-type recording medium such as a CD, FD, MO, or MD, and reading and writing of the recorded data is performed. I decided to do it,
While being able to read and write the recorded data of multiple memory cards accurately using existing recording and playback devices,
Can read and write large amounts of data,
A memory card adapter excellent in compatibility and versatility can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first example of a memory card adapter according to an embodiment of the present invention;

FIG. 2 is a perspective view thereof.

FIG. 3 is a schematic diagram showing a playback mode using the memory card adapter of the first example;

FIG. 4 is a plan view showing a second example of the memory card adapter according to the embodiment of the present invention;

FIG. 5 is a perspective view thereof.

FIG. 6 is a perspective view of an existing FD.

FIG. 7 is a plan view showing a modified form of the second example.

FIG. 8 is a plan view showing a third example of the memory card adapter according to the embodiment of the present invention;

FIG. 9 is a perspective view thereof.

FIG. 10 is a perspective view of an existing MO disk.

FIG. 11 is a perspective view showing a fourth example of the memory card adapter according to the embodiment of the present invention;

FIG. 12 is a perspective view of an existing MD.

13A is a perspective view of a memory card viewed from the front side, and FIG. 13B is a perspective view of the memory card viewed from the back side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Memory card 11 Adapter body 13 Card mounting part 17A Optical modulation element 17B Magnetic modulation element 17C, 17D Magneto-optical modulation element

Claims (10)

[Claims] 1. An adapter main body formed to have the same specification as a dimensional specification of a disk-shaped recording medium larger than a memory card, a plurality of card mounting portions for detachably mounting the memory card on the adapter main body, First means for reading information from a memory card loaded in a card mounting portion, and converting the information read from the memory card into a state in which the information can be read externally as information recorded on the disk-shaped recording medium Wherein the external information reading position of the second means is provided at a position of the adapter body corresponding to a recording surface of the disk-shaped recording medium. Card adapter. 2. A function for reading information written to the memory card adapter from outside as recording information on the disk-shaped recording medium and converting the information into a state in which the information can be written as recording information on the memory card. The first means may further have a function of writing the information converted into a writable state as the recording information of the memory card by the second means in the memory card. The memory card adapter according to claim 1, wherein: 3. The memory card adapter according to claim 1, wherein the disk-shaped recording medium is a CD (Compact Disk). 4. The memory card adapter according to claim 3, wherein said plurality of card mounting portions are distributed at equal intervals in a circumferential direction. 5. The memory card adapter according to claim 1, wherein the disk-shaped recording medium is a floppy disk (FD). 6. The disk-shaped recording medium is an MD (mini
3. The memory card adapter according to claim 1, wherein the memory card adapter is a disk. 7. The memory card adapter according to claim 1, wherein the disk-shaped recording medium is an MO (magnet optical) disk. 8. The memory card adapter according to claim 7, wherein the card mounting portions are provided vertically in the thickness direction of the adapter main body for each pair. 9. The memory card adapter according to claim 8, wherein the memory cards provided to be overlapped vertically are displaced in a plane direction. 10. The memory card adapter according to claim 1, wherein a surface of the memory card held by the card mounting portion is entirely exposed from an adapter main body.