JPS63119082A - Recording card medium - Google Patents

Abstract

PURPOSE:To carry the titled medium while putting it into a breast pocket by providing a centering hole to align the center position and a guide as required to the card and providing lots of concentrical circular-arcs as magnetic or optical recording tracks to the surface of the card around the said center. CONSTITUTION:The center of a recording circular-arc is placed at a position toward the inner side by 10mm from the center of the long side of the card 54mm long by 86mm wide and magnetic powder is coated on a sectorial face apart by 42mm from the center in 26mm radius to form a recording sector. The recording sector corresponds to a half the area of a 3.5inch floppy disk, and 80 tracks per side and 8 sectors per track are provided with a track density of 135/inch and a maximum recording density of 8187 bits/inch and the storage card having nearly 164k bytes of format capacity per side is obtained. The card is provided to a centering hole 3 at the center of the recording circular-arc and the short side is used as a linear guide side.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is an inexpensive, large-capacity, portable card that takes the form of a magnetic recording floppy disk or optical recording disk that can record a large amount of information. This provides a small-sized storage medium.

Conventional technology and problems Conventionally, magnetic recording floppy disks, laser disks, etc. have been used as information storage media that can be accessed directly, but since these have a storage area that is a complete circle, the external shape is square or close to this. However, even if it is miniaturized, it is not necessarily convenient to carry, and as a simple portable card that can record information, a standard card with a band-shaped magnetic stripe or L
IC cards with built-in SI are used. However, standard cards with magnetic stripes are the most widely used but have a small storage capacity, while IC cards have a large storage capacity but are relatively expensive.

Problems to be Solved by the Invention The present invention solves the inconvenience of carrying magnetic recording floppy disks, etc. by not simply making them smaller, and improves the storage capacity of standard magnetic cards, which are cheap but too small for convenient carrying. The objective is to obtain a small, inexpensive, and large-capacity recording medium.

Means for Solving the Problems Currently used magnetic recording floppy disks or laser disks use the entire circumference as a recording track, but the present invention removes a part of the circumference and uses that part as a recording track. The miniaturization problem shown in FIG. 9 is solved by using a circular arc.

However, in this case, the center of the arc is far off the center of gravity of the card,
In some cases, the center may be placed outside the card. Therefore, when a card is inserted into a card drive, the drive's disk is attached to the card so that the recording and reading heads can operate accurately (with minimal off-track) along the relatively arcuate recording track. Center alignment holes and guides that are synchronized with the positioning method will be provided to accurately capture the center.

For example, by providing a card with a circular or regular polygonal centering hole,
Using this center of gravity as a reference point, a point in a certain direction and at a certain distance (including zero) is set as the center of the arc. That is, by providing a centering hole and a centering direction defining line on the card, and setting the distance based on the distance between the centering hole insertion pin of the drive device and the drive shaft, the center position of the circular arc track is defined as the rotation center of the card.

The card is preferably carried in a card cover to avoid damage and inserted into its drive for use.

The drive unit correctly seats the card through centering holes and guides, rotates around the drive shaft, moves the read/write head to a track directed radially by a stepper motor, and drives the card into a position such as an input device such as a keyboard. The card information is input and recorded on the card, and the necessary information on the card is read out.However, as the card rotates, there will be a moment when the card is not under the head, so in the case of a crimp type head, In order to avoid damage due to collision between the double-sided heads or between the heads and the card, the heads are pulled apart from each other during this time, and the heads are lowered only when they are on the active sector. Since these functions are existing technologies, they can be easily implemented.

When the card is installed in a drive device, the recording area of the card is formatted in the same way as a normal full-circle disk by formatting it according to the computer system used, and creating tracks on which to write data. , and prepare the directories necessary for controlling files in a specific area within the card range. In addition, necessary programs are stored according to the purpose.

Note that the card does not necessarily require an index window because the part where no card is present on the rotational circumference of the card rotates every rotation.

Further, unlike floppy disks, a jacket for protecting the recording surface is not used, but it is convenient to use a small disk with a coating to prevent damage.

Function: By using this invention, it is possible to carry a recording medium in a breast pocket, etc., and it is possible to accurately mount a recording medium on a drive device with a matching positioning function, and to achieve a large storage capacity by using a large number of arcuate tracks on the card. Available at low cost.

Embodiment 1 FIG. 1 shows an embodiment in which the center of the recording arc is placed within the card surface. That is, the center of the recording arc is placed 10 mm inside the center of the long side of a card measuring 54 mm long and 86 mm wide, and the radius from this center is 26 mm to 42 mm.

Magnetic powder is applied to the fan-shaped surface of the disk to form a recording area.

The fan-shaped recording area corresponds to half of a 3.5-inch floppy disk, and assuming a track density of 135/inch and a maximum recording density of 8187 bits/inch, each side has 80 tracks.
It is possible to set up 98 sectors per track, which is approximately 1 per side.
A storage card with a formatting capacity of 64 bytes is obtained. A centering hole is provided in the card at the center of the recording arc, and the short side is used as a linear guide side.

The drive device pulls in the card using the short side as a guide, and after confirming that the centering holes are aligned using a photodetection method, the center needle of the drive device is lowered and its conical surface aligns the center more accurately, and chucking is performed. Adopt.

In addition, the drive device for this card can create a chucking hole in the center of the card recording arc and a positioning hole in the vicinity of the chucking hole in the card surface, so it is possible to create a chucking hole in the center of the card recording arc and a positioning hole in the vicinity of the chucking hole. A disk positioning method using a drive bin method can also be adopted.

Embodiment 2 FIG. 2 shows an embodiment in which the center of the recording arc is placed 5 mm outside the center of the long side of the card.

The card measures 54 mm in length and 86 mm in width, with the long side as the center direction defining line (the center is perpendicular to the long side), and a circular arc notch with a radius of 15 mm in the center of the long side.

This card drive device uses the short side of the card as a guide to pull the card to the long side (center direction defining line), and uses the centering hole provided inside the circular notch to determine the card position in the drive device and accurately center the card. Align and lower the center hub and chuck it.

The center may be properly aligned with the central axis of the drive device by using the circular arc notch as a circular centering hole.

If we apply magnetic powder to a 58 mm fan-shaped surface to create a recording area, the recording area will correspond to part of a 5.25-inch floppy disk, with a track density of 96/inch and a maximum recording density. At 650 bits/mm, it is possible to provide 4 sectors on 40 tracks on the outer circumference on one side, and 6 sectors on 80 tracks on the center side, resulting in a memory card with a format capacity of approximately 300 bytes on both sides.

Example 3 Record the center of the arc in Figure 6 outside the midpoint of the long side of the card.
An example is shown in which it is placed at a position of 4 mm.

The length of the card is 54 mm and the width is 86 mm, and the center point of the long side is 3
Add semicircular notches with a radius of 2 mm on both sides of 0 cm,
Let the common tangent line of these two circles be the center direction defining line (the center is in this vertical direction), and it is the midpoint of the long side. Make a centering hole with a diameter of 4 mm inside the 16 mm hole.

This card is a card-shaped recording medium having as a recording track a concentric circular arc with a radius of 56 to 88 mm centered at a point 50 mm on a perpendicular line from the center of the centering hole to the center direction defining line.

The recording track is a curved band-shaped area that becomes the recording area when the area between both short sides of the card is used approximately in a circular manner.

Since 3 bytes can be recorded on each track, 60 tracks can be provided at a track density of 48/inch, resulting in a storage card with an unformatted capacity of about 180 bytes on one side.

This card driving device feeds the card up to the two semicircular notches on the long sides, inserts a needle into the centering hole, and chucks the card.

Note that this card can also be shaped with the vertical and horizontal directions reversed.

effect The present invention provides the following effects.

(1) Directly accessible large storage capacity with a large number of tracks in the recording area can be obtained using a conventional sized card.

(2) In the case of magnetic recording, it becomes a particularly inexpensive large-capacity portable storage card, which, in combination with an inexpensive card drive device, opens the door to a wide range of card uses.

(8) Since it is in the form of a card, it is easy to sort, store, and take out, and it is easy to carry in your pocket or send by mail.

(4) If an automatic card feeding device is combined, a storage device with even larger capacity can be formed.

[Brief explanation of the drawing]

Figures 1.2.3 show conceptual diagrams of card-shaped recording media of Examples 1.2.6, respectively. In the drawings, 1 is a linear guide side, 2 is a center direction defining line, 6 is a centering hole, 4 is a storage area with diagonal lines, and 0 is the center of an arcuate track. However, the shaded area 4 is a fan-shaped storage area in FIG. 1.2, and is a band-shaped fan-shaped similar storage area in FIG.

Claims (1)

[Claims] 1. A card is provided with a centering hole for defining the center position and a guide if necessary, and a number of concentric arcs centered on this center are recorded magnetically or optically on the surface of the card. A card-shaped recording medium characterized by being held as a track. 2. The card-shaped recording medium according to claim 1, wherein a point-symmetrical centering hole such as a circle is provided on the inside of the long side of the card, and a sector-shaped area on the card centered on the center of gravity is a recording area. 3 Provide a centering hole and a center direction defining line on the card,
A patent that defines a recording area as a band-shaped area on a card, which is defined by two concentric arcs centered on a point determined by a center direction defining line from the centering hole and a distance set on the drive device, and a straight line on both sides of the area. A card-shaped recording medium according to claim 1. 4. The card-shaped recording medium according to claim 3, wherein the recording area is a fan-shaped area whose radius is a straight line separating both sides of the recording area.