JPH0265047U

JPH0265047U -

Info

Publication number: JPH0265047U
Application number: JP14257988U
Authority: JP
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-05-16

Description

[Brief explanation of the drawing]

第１図は本考案一実施例のブロツク回路図、第
２図は他の実施例のブロツク回路図、第３図は同
上の具体回路図、第４図は従来例のブロツク回路
図、第５図および第６図は他の従来例の回路図で
ある。１は直流電源、２は２次電池、３はスイツチ回
路、４は負荷、５は充電検出回路、６は接続検出
回路、７は動作表示回路、Ｒ_０，Ｒ_１０は抵抗、
ＬＤは発光ダイオード、Ｑ_１，Ｑ_２はスイツチ素
子である。 Fig. 1 is a block circuit diagram of one embodiment of the present invention, Fig. 2 is a block circuit diagram of another embodiment, Fig. 3 is a specific circuit diagram of the same, Fig. 4 is a block circuit diagram of a conventional example, and Fig. 5 is a block circuit diagram of an embodiment of the present invention. This figure and FIG. 6 are circuit diagrams of other conventional examples. 1 is a DC power supply, 2 is a secondary battery, 3 is a switch circuit, 4 is a load, 5 is a charging detection circuit, 6 is a connection detection circuit, 7 is an operation display circuit, R ₀ and R ₁₀ are resistors,
LD is a light emitting diode, and Q ₁ and Q ₂ are switch elements.

Claims

[Scope of utility model registration request]

The secondary battery is constantly trickle-charged from the DC power source, which is obtained by stepping down and rectifying the AC power source with a step-down transformer, the switch circuit that controls the power supply from the secondary battery to the load, and the charging of the secondary battery is performed normally. A charging detection circuit detects whether the load is connected properly, a connection detection circuit sends a small current to the load and detects whether it is connected normally, and the charging detection circuit outputs a normal charging signal and the connection detection circuit outputs a normal charging signal. In a power supply device provided with an operation display circuit that lights up a light emitting diode when a connection detection signal is output, a first circuit that is turned on in response to a normal charge detection signal;
A series circuit consisting of a switch element, a light emitting diode, and a current limiting resistor is connected to a DC power source, and a second switch element, which is turned off by a normal connection detection signal, is connected in parallel with the light emitting diode to form an operation display circuit. A power supply device characterized by: