CN2324660Y

CN2324660Y - Cipher locking socket

Info

Publication number: CN2324660Y
Application number: CN 98210250
Authority: CN
Inventors: 俞天源; 俞润源
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-02
Filing date: 1998-01-02
Publication date: 1999-06-16
Anticipated expiration: 2008-01-02

Abstract

The utility model discloses a cipher locking socket, comprising a socket base and a socket panel. The socket panel is provided with a plug jack. After the parallel connection of a resistance and a capacitance, one path of a cipher locking controlling circuit is connect with a rectifying diode in series with a filter circuit connected with the ground. The other path is connected with a voltage stabilizing diode in series and a cipher switch circuit composed of a voltage regulating direct current power supply and a pulse frequency divider which are connected with the ground, a resistance, a diode, an LED, a transistor, a relay, and a cipher locking key. The utility model has the advantages of simple structure, high safety and convenient operation.

Description

The password locking socket

The utility model relates to electric switch, relates in particular to a kind of password locking socket.

Along with improving constantly of people's living standard, home audiovisual equipment such as television set, video tape recorder, video disc player progressively enter common people house, it has also brought some very important negative effects when the free life of giving people brings the rich cultural joy, especially bigger to children's influence.Present used appliance socket comprises socket, socket panel, is provided with jack on socket panel, can't close locking to power supply.

The purpose of this utility model provides a kind of password locking socket esy to use, safe and reliable.

The utility model is taked following measures in order to achieve the above object, and it comprises socket base, and socket panel is provided with jack on socket panel, is provided with password locking button, password locking indicator light, cipher control circuit on socket panel; Cipher control circuit is: constant voltage dc source and password switching circuit two parts.

The utility model has the advantages that: reasonable in design, simple in structure, safe and reliable, easy to use.

Accompanying drawing is the electrical schematic diagram of password locking socket.

It comprises socket base the password locking socket, and socket panel is provided with jack on socket panel, is provided with password locking button, password locking indicator light, cipher control circuit on socket panel; Cipher control circuit is: resistance R ₁, capacitor C ₁, and after connecing, one tunnel serial connection rectifier diode VD, filter capacitor C ₂Ground connection, constant voltage dc source and pulse frequency divider IC and resistance R that another road serial connection voltage stabilizing didoe VDW ground connection constitutes ₃～R ₆, diode D ₁～D ₃, LED, triode VT, relay J, password locking button K ₁～K ₈The password switching circuit two parts that constitute, password switching circuit is: the CP pin series resistor R of pulse frequency division IC ₃After, ground connection, and meet password locking button K ₁～K ₄, meet the Y of pulse frequency divider IC after the serial connection respectively ₀Pin, Y ₁Pin, Y ₂Pin, Y ₃Pin, the Y of pulse frequency divider IC ₁Pin, Y ₂Pin, Y ₃Pin is connected in series diode D respectively ₁, D ₂, D ₃After, and wrong mistake button K ₅, K ₆, K ₇, after the serial connection again and connect; The R pin series resistor R of pulse frequency divider IC ₂Back ground connection, and wrong mistake button K ₅, K ₆, K ₇With cut-off button K ₈After the serial connection, cut-off button K ₈One the tunnel and meet pulse frequency divider Y ₄Pin, another road and sending and receiving optical diode LED, after the serial connection, series resistor R again ₅Back ground connection, again one the tunnel and connecting resistance R ₄, after the serial connection, be connected in series behind the triode VT one the tunnel again, the serial connection relay J again with rectifier diode VD filter capacitor C ₂Tie point joins; Another road ground connection, pulse frequency divider IC has the EN pin, VSS pin ground connection, the VDD pin is also succeeded electrical equipment J, capacitor C ₂, rectifier diode VD.Pulse frequency divider IC is counting sequence decoder 4017 decimally.

Connection procedure of the present utility model and operation principle are as follows, when energized, and pulse frequency divider IC return-to-zero, pulse frequency divider Y ₀The output high level, Y ₁Pin, Y ₂Pin, Y ₃Pin, Y ₄Pin is a low level, presses password locking button K ₁, the clock input pin CP that the direct impulse signal arrives pulse frequency divider IC counts effectively.The Y of pulse frequency divider IC ₀Pin becomes low level, Y ₁Pin output high level; Press password locking button K again ₂, pulse is effective to pulse frequency divider CP pin counting.Y ₁Pin becomes low level, Y ₂Pin output high level.In like manner, press K successively ₁～K ₄, high level arrives Y ₄Pin, the high level of output makes lumination of light emitting diode, wherein resistance R ₅Be the current-limiting resistance of light-emitting diode, high level is trigger triode VT conducting also, the normally opened contact JK adhesive of relay J, socket power conducting, wherein R ₄Current-limiting resistance for triode.Cut-off button K ₈And Y ₄The R pin of pulse frequency divider IC links to each other, and presses K ₈, high level arrives clear terminal R, pulse frequency divider IC return-to-zero, the Y of IC ₀Pin becomes high level, the Y of IC ₄Pin becomes low level, and triode VT ends, and relay discharges, the socket power outage.Wrong button K ₅, K ₆, K ₇One end links to each other with the R pin of IC, the other end respectively with the Y of IC ₁Pin, Y ₂Pin, Y ₃Pin links to each other, and is pressing K successively ₁, K ₂, K ₃, K ₄The time, press K ₅, K ₅, K ₇In any key, no matter high level is at Y ₁Pin, Y ₂Pin, Y ₃That end in the pin, IC can't energized all with return-to-zero.With Y ₁Pin, Y ₂Pin, Y ₃The diode D that pin links to each other ₁, D ₂, D ₃Effect be to intercept Y ₁Pin, Y ₂Pin, Y ₃High level between pin three ends.Resistance R ₂Constitute zero clearing network, resistance R with the R end of IC ₆Release resistance for the light-emitting diode residual voltage.

Claims

1. password locking socket, it comprises socket base, socket panel is provided with jack on socket panel, it is characterized in that being provided with on socket panel password locking button, password locking indicator light, cipher control circuit; Cipher control circuit is: constant voltage dc source and password switching circuit two parts.

2. a kind of password locking socket according to claim 1 is characterized in that said password switching circuit is: the CP pin series resistor R of pulse frequency division IC ₃After, ground connection, and meet password locking button K ₁～K ₄, meet the Y of pulse frequency divider IC after the serial connection respectively ₀Pin, Y ₁Pin, Y ₂Pin, Y ₃Pin, the Y of pulse frequency divider IC ₁Pin, Y ₂Pin, Y ₃Pin is connected in series diode D respectively ₁, D ₂, D ₃After, and wrong mistake button K ₅, K ₆, K ₇, after the serial connection again and connect; The R pin series resistor R of pulse frequency divider IC ₂Back ground connection, and wrong mistake button K ₅, K ₆, K ₇With cut-off button K ₈After the serial connection, cut-off button K ₈One the tunnel and meet pulse frequency divider Y ₄Pin, another road and sending and receiving optical diode LED, after the serial connection, series resistor R again ₅Back ground connection, again one the tunnel and connecting resistance R ₄, after the serial connection, be connected in series behind the triode VT one the tunnel again, the serial connection relay J again with rectifier diode VD filter capacitor C ₂Tie point joins; Another road ground connection, pulse frequency divider IC has the EN pin, VSS pin ground connection, the VDD pin is also succeeded electrical equipment J, capacitor C ₂, rectifier diode VD.

3. a kind of password locking socket according to claim 1 and 2 is characterized in that said pulse frequency divider IC is counting sequence decoder 4017 decimally.