JPH0475978U

JPH0475978U -

Info

Publication number: JPH0475978U
Application number: JP11888290U
Authority: JP
Priority date: 1990-11-15
Filing date: 1990-11-15
Publication date: 1992-07-02

Description

[Brief explanation of the drawing]

第１図ａ，ｂは本考案によるバツテリ電圧の検
出・表示装置を備えたＩＣカードの一実施例を示
す模式構造図、第１図ａは要部外観を示す斜視図
、第１図ｂは要部断面図、第２図は従来のバツテ
リ電圧検出回路の内容を示す要部回路図、第３図
は第１図の実施例のＩＣカードを構成する回路図
、第４図はバツテリ電圧及び発熱抵抗の印加電圧
の経時変化の関係を示す線図である。図において、１は回路素子、２は発熱抵抗、３
はＮチヤンネルＦＥＴ、４はＮチヤンネルＦＥＴ
、５は基板、６はフレーム、７は表面カバー、８
は電池カートリツジ、９はバツテリ、１０はＲＡ
Ｍカード、１１はサーモシート、１２はヒユーズ
、１３は抵抗である。 Figures 1a and 1b are schematic structural diagrams showing an embodiment of an IC card equipped with a battery voltage detection and display device according to the present invention, Figure 1a is a perspective view showing the appearance of the main parts, and Figure 1b is a 2 is a main part circuit diagram showing the contents of a conventional battery voltage detection circuit, FIG. 3 is a circuit diagram configuring the IC card of the embodiment shown in FIG. 1, and FIG. 4 is a diagram showing battery voltage and FIG. 3 is a diagram showing the relationship of the voltage applied to the heating resistor over time; In the figure, 1 is a circuit element, 2 is a heating resistor, and 3 is a circuit element.
is N-channel FET, 4 is N-channel FET
, 5 is a board, 6 is a frame, 7 is a surface cover, 8
is the battery cartridge, 9 is the battery, 10 is the RA
M card, 11 is a thermo sheet, 12 is a fuse, and 13 is a resistor.

Claims

[Claims for Utility Model Registration] (1) A device with a built-in battery operated by its electric power, a thermosheet provided in a visible position of the device, and a thermosheet irreversibly colored by heat. A battery voltage detection system comprising a heating element, a drive circuit that energizes the heating element, and a detection circuit that detects battery low and outputs an alarm instructing the drive circuit to energize.
Display device. (2) The battery voltage detection/display device according to claim 1, wherein the battery and thermosheet are assembled into an integrally molded battery cartridge, and are detachably attached to a notch of the device.