JPH0615686Y2 - Storage case for magnetic recording disks, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a storage case for magnetic cards such as cash cards, credit cards, members cards and telephone cards, IC cards and floppy disks for computers and the like. .

(Prior Art) Conventionally, magnetic cards such as cash cards and IC cards are put in a flat synthetic resin case or in a pocket portion attached to a wallet or the like.

(Problems to be solved by the invention) However, these card holders are not magnetically shielded, so that the magnetic field recorded on the card may move or disappear if they are brought close to the location where magnetic lines of electric equipment are generated. However, it may not work even if inserted into a machine such as an automatic teller machine, or may malfunction even if it works. Moreover, the locations where the above-mentioned magnetic field lines are emitted are scattered everywhere, and the card is often brought close to these locations without care.
Also, as the amount of information on IC cards increases, for example, 1M
When it becomes a high density IC of ~ 5 Mbit, there is an increased risk of destruction due to electromagnetic interference due to electromagnetic waves or electrostatic discharge.

As a countermeasure against this, there is a device that covers the card holder with a conductive material and magnetically shields it, but in this case it is a conductive material, so if the card comes into direct contact with this conductive material, the card is easily charged and discharged easily. , Very dangerous. When the case is opened and the card is to be grabbed, static electricity charged on the human body may be discharged or flow to the card.
The capacitance of this human body is also about 100-200PF, so 30
It may be charged to 00V, in which case the energy is E
= 1 / 2CV ² (J) 0.2-0.3mJ, reaching the energy value for the ignition of organic solvents. Therefore, when the card directly contacts the metal, this energy is released, and therefore, for example, when the card is inserted into or removed from the device with built-in computer, the computer or the like may malfunction.

Therefore, it is possible to provide an insulating material on the outer surface of the conductive material, but static electricity easily accumulates at the interface between the insulating material and the conductive material,
Similar to the above, static electricity may flow to the card in the card case. In addition, when the fingertip of the human body touches the object simply covered with the conductive material, the discharge from the fingertip always occurs, including a slight amount of discharge. Also, when the card is taken out of this case, static electricity is regenerated due to friction. The static electricity generated in the conductive material itself is dispersed, but since the capacity of the conductive material is limited, the static electricity cannot be reduced to zero without grounding. On the contrary, in the case of using only the conductive material, electricity is stored at the interface between the high-dielectric material and the conductive material or at the surface of the conductive material with the air layer to act as a capacitor. Therefore, static electricity does not reach zero unless the card itself has an antistatic function.

(Means for Solving the Problems) Therefore, the present invention provides a storage case for a magnetic recording disk or the like having these magnetic shields and static electricity removal or antistatic effects.

The structure is such that at least both side plates of a card holder for accommodating one or more magnetic recording disks or the like to be stored in order, from the outer side to the inner side, a cosmetic outer layer having a function of antistatic treatment, a conductive layer and an antistatic layer. It is a polymerized inner layer having a processing function. The layer having an antistatic treatment function here is a sheet-like material such as cloth, non-woven fabric, paper, synthetic paper, or synthetic resin to which an antistatic agent is fixed. The substrate layer is transferred to other substances in an extremely small amount so that the base layer does not lose its antistatic function for a long period of time. The magnetic recording disk and the like mentioned here include magnetic cards, floppy disks, IC cards, and compact disks.

(Function) When a magnetic recording disk such as a card is put in this storage case,
Since the card and the like are covered with the conductive layer, various electromagnetic waves and light are shielded. In addition, when a card etc. is placed in this storage case, static electricity may be generated on the card surface due to friction with the inner side surface of the storage case, but there is a layer with an antistatic treatment function on the inner side surface. Continuing on, since there is a conductive layer, there is no electric field inside this storage case,
No static electricity is generated. In addition, even if static electricity flows from the outside to the card, the outer layer of the makeup has an antistatic treatment function, so the static electricity is either removed by the layer or quickly induced and dispersed by the conductive layer on the back surface, and the inner layer has the antistatic treatment function. The static electricity is erased without the occurrence of discharge. In addition, when a card or the like is put in or taken out of this storage case, the side surface of the card or the like comes into contact with the layer having the antistatic treatment function, whereby the antistatic treatment function is added to the card or the like, and these themselves exert the antistatic treatment function. Come to do. The method of transferring the antistatic treatment function to the card etc. placed in this case is carried out very little by little, and it is controlled so that the contact substance such as the card adheres to several to 30 molecular layers. Therefore, the adhesion amount is small, and therefore, the function of the layer having the antistatic treatment function of the case which is the base material is not lost for a long period of time, and for example, in general use, it can be used for 5 to 6 years.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a flat storage case, and this storage case 1 has a pocket-shaped card storage portion 2 provided on one side. Reference numeral 3 denotes both side surface plates of the storage case 1. The both side surface plates 3 are formed by folding back and stacking a single plate body, and the outer end edges thereof are fixed to each other by a separating portion 4. Each of the side plates 3 has an antistatic function fixed by sequentially fixing an antistatic agent from the outer side to the inner side, and a raised fabric 5, a foam material 6, an aluminum foil 7, and an antistatic agent fixed to perform the antistatic function. The napped cloth 5 and the foamed material 6, and the aluminum foil 7 and the inner cloth 8 are slidably attached to each other except for the above-mentioned four separating portions. Further, the nap cloth 5 and the inner cloth 8 are each provided with an antistatic function by fixing a nonionic surfactant.
The surface resistance value is 10 ⁶ to 10 ⁸ Ω. The foam material 6 is made of an insulating material and has a surface resistance value of 10 ¹² Ω or more.
Is a conductive material and is about 10 ^-6 Ω.

In the case of this embodiment, when the card C is inserted into the card storage portion 2, the entire circumference of the card C is substantially in the storage case 1. As a result, the card C is covered with the aluminum foil 7,
External electromagnetic waves and the like are shielded by the aluminum foil 7. In addition, the static electricity that flows from the outside to the storage case 1 is the raised cloth 5 on the outer surface.
Instantly erase by. Further, the foam material 6 serves as a cushioning material against the impact from the outside, absorbs the impact on the card C, and protects the card C. Also, when a card C charged with static electricity on the surface is put into this card case, both sides of the card C hit the inner cloth 8, and the static electricity flows to the aluminum foil 7 through the inner cloth 8 and is induced by the aluminum foil 7. After being dispersed, the inner cloth 8 is erased by the static elimination effect of the antistatic agent. At this time, since the inner cloth 8 is slidable with respect to the aluminum foil 7, the inner cloth 8 moves when the card C is put into the card storage portion 2 and the movement and erasing of static electricity is promoted. Further, when the card C is put into or taken out of the card storage part 2 of the storage case 1, both side surfaces of the card C come into contact with the inner cloth 8 on the inner periphery of the card storage part 2 and thus the antistatic charge fixed to the inner cloth 8 is prevented. The agent adheres to the both side surfaces of the card C by several molecular layers, and the antistatic treatment function occurs on both side surfaces of the card C itself. Since the amount of the antistatic agent attached to the card C is very small, unlike the one that is impregnated and adsorbed,
Does not cause secondary damage. The ratio of the adhered amount is about 1/1500 to 1/15000 compared to the impregnated one. Therefore, the antistatic treatment function of the inner cloth 8 of the case 1 can endure long-term use.

Further, the above embodiment is a storage case in which one card C is inserted, but it is also possible to insert several cards in a stack, and as shown in FIG. 3, a storage case 1'consisting of the above embodiment is provided on one side of a wallet 10 or the like. It may be provided with several stages.

Further, the raised cloth 5 having the antistatic function in the above embodiment.
Is not an essential requirement of the present invention, and may be a cosmetic outer layer having an appropriate antistatic function. The decorative outer layer or inner cloth 8 may be cloth, non-woven fabric, paper, synthetic paper, foamed material surface-implanted with fibrous material, plastic material such as sheet material, and the foamed material 6 is It is a cushion layer made of an insulating material and may be integrated with the above-mentioned decorative outer layer. Further, the aluminum foil 7 may be a conductive layer made of a suitable iron plate or other metal, or a conductive material such as graphite.

In the above embodiment, a magnetic card such as a cash card,
Although IC cards have been described, the present invention is not limited to magnetic cards and IC cards, but can be applied to any suitable magnetic recording disk, such as a floppy disk of a computer or other flat object such as a compact disk that needs antistatic. is there.

(Effect of the Invention) As described above, since the storage case of the present invention has the conductive layer inside, it has a magnetic shielding effect and a light shielding effect. Therefore, it is possible to store magnetic cards, magnetic recording disks such as floppy disks, IC cards, etc. without worrying about where magnetic field lines are emitted as in the conventional case.

In addition, static electricity generated inside and outside the card compartment can be instantly erased.For example, static electricity charged on the human body flows to the cards when the cards are touched with hands. Since the antistatic layer is gently processed while doing so, static electricity can be erased without generating discharge, and the recorded magnetism of cards and electronic parts such as ICs are not adversely affected. Therefore, it is possible to securely protect electronic components and circuits such as magnetism and IC recorded on cards from static electricity and electromagnetic waves, and to store magnetic recording disks such as magnetic cards and floppy disks, IC cards, and eventually compact disks. It is a very convenient storage case.

[Brief description of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is A in FIG.
FIG. 3 is an enlarged sectional view taken along line A, and FIG. 3 is a perspective view showing another embodiment of the present invention. In the figure, 1 is a storage case, 2 is a card storage portion, 3 is a side plate, 5 is a raised cloth with an antistatic function, 6 is a foam material, and 7 is a foam material.
Is an aluminum foil, and 8 is an inner cloth having an antistatic function.

Claims (1)

[Scope of utility model registration request] 1. A makeup outer layer, a conductive layer, and a charging member having an antistatic treatment function in at least both side plates in order from the outer side to the inner side of a storage case for accommodating one or several magnetic recording disks or the like to be stored. A storage case for a magnetic recording disk or the like, characterized in that an inner layer having an anti-static treatment function is polymerized to constitute, and the layer having the anti-static treatment function is subjected to anti-static treatment with an antistatic agent.