JPH02305694A - Telephone card - Google Patents

Abstract

PURPOSE:To prevent the reutilization of a telephone card even when magnetic data is transferred to close a punched hole by embedding an electric continuity element such as a resistor on both sides of the punched hole. CONSTITUTION:When a telephone card is inserted in a telephone, the data of a magnetic data layer 1 is inspected and the total resistance value of resistors in a residual quantity direction from a punched hole 2 among resistors 3 connected in series is measured to be collated with the residual quantity of magnetic data. When inspection and collation become OK, a telephone call can be given. After a telephone call, the residual quantity corresponding to the sum after the payment of the use charge is written in the magnetic data layer 1 and the punched hole 2 is opened at the position corresponding to the residual quantity to destruct the resistors 3. Therefore, even when the punched hole 2 is filled to be ready to reutilize the card, since the punched hole 2 becomes a non-continuity state, the card can not be reutilized.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a telephone card.

[Conventional technology]

Figure 2 is NTT's “Research and Practical Application Report J Vol. 32 No. 2 (
1983)'s "Magnetic Card Public Telephone JP446-P"
447. This is a telephone card currently in use.

In the figure, (1) is a magnetic data layer, and (2) is a punch hole.

Next, the operation will be explained. When the telephone card is inserted into the telephone, the data in the magnetic data layer (1) is verified and the position of the punch hole (2) is measured and checked against the balance of the magnetic data. Once the test is approved, you can make a phone call. When the call is completed, the remaining amount after the usage fee is deducted is written on the magnetic data layer (1), and a punch hole (2) is punched at the position corresponding to the remaining amount.

[Problem to be solved by the invention]

Conventional telephone cards are structured as described above, so when purchasing a telephone card, the data on the magnetic data layer (1) is transferred and stored, and the data transferred and stored on the used telephone card is transferred. Transfer and punch holes (2
) can be reused by blocking it with some kind of substance. This invention was made to solve the above problems, and it is possible to transfer magnetic data and reuse it even if the punch hole is large. The purpose is to obtain a telephone card that cannot be used.

(Means for Solving Problem 21) A telephone card according to the present invention has an electrically conductive element such as a resistor embedded between the positions of punch holes.

[Effect]

When the telephone card according to the present invention is inserted into a telephone set, the degree of conductivity of the electrically conductive element is measured and compared with the remaining amount.

〔Example〕

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

In FIG. 1, (1) is magnetic data 10. (2) is a punched hole, and (3) is a resistor.

Next, the operation will be explained. When the telephone card is inserted into the telephone, the magnetic data Jl (1) is verified and the total resistance of the resistor (3) connected in series in the direction of the remaining capacity from the punch hole (2) is verified. The value is measured and checked against the remaining amount of magnetic data. Once the verification and verification are OK, you can make a phone call. When you finish making a call, the remaining amount corresponding to the amount of the usage fee deducted will be transferred to magnetic data B (1
), a punch hole (2) is punched at a position corresponding to the remaining amount, and the resistor (3) is destroyed. Therefore, even if you try to fill the punch hole (2) and reuse it, the punch hole (2)
) becomes non-conductive and cannot be reused.

Although a resistor was used in the above embodiment, a copper strip or the like may be embedded to check the conduction between the punched holes, or an inductance element or a capacitance element such as a capacitor may be used to measure the conductivity using AC current. You can also measure it.

Further, in the above embodiment, the case of using a telephone card has been described, but a general prepaid card such as an Orange Card or an N Card, or a commuter pass may also be used, and the same effects as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, an electrically conductive element is embedded in a telephone card, so even if the punched hole is covered with some substance, it will not be possible to compare the electrical conductivity and the remaining amount of magnetic data, and the transfer of magnetic data and the punched hole will not be possible. Roughnicks that are reused by Fusaggi have the effect of becoming unusable.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a telephone card according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional telephone card. (1) Magnetic data layer (2) Punch hole (3) Resistor In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] (1) The phone has a magnetic data layer that stores a value corresponding to the amount of usage, and punch holes are sequentially punched at predetermined locations according to the amount of usage, and the punch holes allow the user to recognize the amount of usage. 1. A telephone card characterized in that an electrically conductive element, which is an electrical resistance element, is provided between the predetermined positions where the punch holes are formed.