JPH0210627Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention prevents the data on cards such as bank cash cards and commuter passes that have magnetically recorded data from disappearing due to the influence of strong external magnetic fields, and also reduces the weight of the cards. This provides a protective case that achieves the following.

Recently, bank cash cards, credit cards, ID cards, card keys, public telephone cards,
Card-shaped magnetic recording media such as commuter passes became extremely popular.
These magnetic recording cards are weak against external magnetic fields and are easily destroyed by magnetic fields of 300 Gauss or more.

All of the cases used for conventional cards are made of vinyl or a similar material and are not susceptible to magnetic force.

In today's world, when magnets are used in the clasps of handbags, and many magnets or sources of magnetic force are used in home appliances, the magnetic field lines emitted by these magnets are used to record information on these cards. The current situation is that the data stored in the computer disappears very often, and it takes a lot of effort to re-enter the data each time.

In addition, there are many cases where cards become bent or otherwise deformed while they are in a pocket, causing insufficient tracing of the magnetic head in a magnetic card reader and rendering the card unusable due to incomplete reading of recorded data. This is the current situation.

This invention aims to solve and eliminate all the above-mentioned drawbacks by means of a simple construction.

The magnetically resistant protective case of the embodiment of this invention will be explained based on the drawings. Protective cases are usually made of vinyl chloride, leather, polyethylene, etc.;
are made double, and iron or steel plates are arranged between them in correspondence with the magnetic stripe parts 4 above and below the cards.

As described above, the magnetic recording card is characterized in that a metal plate having a thickness of 1 mm or less and having the property of shielding external magnetic force is disposed in parallel on both or one side of the front and back of the magnetic recording card.

As mentioned above, this device has a metal plate with magnetic shielding power on both sides or one side of the magnetic recording card, so even if a magnet that generates a fairly strong magnetic force is brought into contact with this metal side, Compared to a device that does not use a metal plate, the magnetic force on the opposite side of the metal plate is extremely weak, and even when the iron plate is thin, the magnetically recorded data on cards will not be erased, and the recorded data can be protected.

Further, the above-mentioned cards are usually made of plastic and may easily bend in a pocket, but this can also be prevented by providing metal plates on both or one side of the protective case.

Furthermore, the weight of the protective case can be reduced by protecting both sides of the case with 0.2mm thick metal plates.
Although it is heavy, in this invention, only the magnetic stripe part is placed on the same 0.2 mm thick metal plate 2, divided into the upper and lower parts of the protective case as seen in Figure 1. Figure 4 shows a comparison of the weights of protective cases, and in order to provide the same anti-magnetic effect to the protective case, the weight can be reduced by approximately 23%.

In this way, it is possible to manufacture a magnetically resistant protective case that is lightweight and has high magnetic resistance.

Furthermore, since the card case body 1 is made double, damage to the card due to friction between the metal plate 2 and the magnetic recording card body 3 can be prevented.

In addition, if the protective case has the same weight, the thickness of the anti-magnetic material can be increased, so the anti-magnetic performance can be improved. In addition, by reducing the area of the magnetically resistant material, it is possible to prevent discharge of high frequency welders, thereby reducing the number of defective products and reducing manufacturing costs.

[Brief explanation of the drawing]

Figure 1 is a plan view of one embodiment of the magnetically resistant protective case according to this invention, Figure 2 is a sectional view taken along line AA in Figure 1, Figure 3 is a sectional view taken along line BB in Figure 1, and Figure 4 is a sectional view taken along line AA in Figure 1. The figure is a diagram for explaining the effect of this invention. In addition, in the figure, 1 is the card case body, 2
3 indicates a metal plate, 3 indicates a magnetic recording card body, and 4 indicates a magnetic stripe portion.

Claims (1)

[Scope of utility model registration request] In a protective case for a magnetic recording card having a magnetic stripe portion such as a cash card, credit card, card key, ID card, public phone card, commuter pass, etc., the protective case is formed into a bag shape with two layers, 1. A protective case for a magnetic recording card, characterized in that a magnetic shielding material is divided into two and placed only at a location between the layers corresponding to the magnetic stripe section.