CN2095511U

CN2095511U - Time limiting rectification power supply

Info

Publication number: CN2095511U
Application number: CN 91217578
Authority: CN
Inventors: 陆波
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-10
Filing date: 1991-07-10
Publication date: 1992-02-05

Abstract

The utility model discloses a time limiting rectification power supply matching with a computer game. A casing is composed of an upper cover and a base. An alternating-current and a direct-current power supply plugs are arranged on the base. A definite time switching circuit is added in a circuit behind a filtering capacitance. The circuit is formed by an RC charge and discharge loop, a changeover circuit, a micro current commutation circuit, field effect transistor or a Darlington tube which controls the switching of a main circuit or two triodes which are compositely jointed and a leakage resistance. The time limiting rectification power supply can stop to supply for the computer game after switching on a set time, and can automatically recover the capacity of electric power supply through the other set time.

Description

Time limiting rectification power supply

The utility model is applicable to the in limited time rectifier power source supporting with computer games.

Have now and the supporting common rectifier power source of computer games, its housing is made up of loam cake and base, base has ac power plug and dc power plug, enclosure interior has transformer, rectifier cell and filter capacitor, as with the supporting RW900 type rectifier power source of SY700 type computer games, this rectifier power source is simple in structure, and is safe and reliable, can continuously power, but it does not possess timing function to the computer games main circuit.

Adult or the teenage player that some ability of self control are not strong uses the computer games that is equipped with common rectifier power source, and often the overlong time of Waning delays study, and influence is physically and mentally healthy.

The purpose of this utility model provides and a kind ofly is applicable to the in limited time rectifier power source supporting with computer games, thereby has overcome the defective that exists in the above-mentioned existing game machine.

The utility model is to realize like this, housing is to be adopted by loam cake and base to be threaded and to constitute, on base, have ac power plug and dc power plug, a transformer is arranged in circuit, rectifier cell and filter capacitor, behind filter capacitor, add a regularly on-off circuit, this circuit can be by the RC charging and discharging circuit, change-over circuit, micro-current switch circuit, two triodes and the bleeder resistance of the field effect transistor of control main circuit break-make or Darlington triode or compound connection are formed, it can be behind energized one setting-up time, stop to the power supply of computer games main circuit, and through automatic recovery of power supply ability behind another setting-up time.

Timing on-off circuit in the utility model is kept work by the electric energy that filter capacitor C1 stores under the main circuit off-position, wherein the RC charging and discharging circuit can adopt resistance R 1, R2 to connect with capacitor C 2; Resistance R 1, R2 press the 1:1 configuration; Change-over circuit adopts the Schmidt trigger integrated circuit (IC) chip; Micro-current switch circuit adopts resistance R 3 in parallel with PNP triode Q1.

When rectifier power source energising in limited time, direct voltage is added to change-over circuit through resistance R 3, because the voltage on the capacitor C 2 can not suddenly change, input 13 pin of change-over circuit are low level, output 8 pin are high level, make field effect transistor Q2 conducting, connect main circuit, thereby make triode Q1 conducting, power supply is directly powered to change-over circuit.The high level of 8 pin output simultaneously gives capacitor C 2 chargings by resistance R 1, R2, and the voltage on the capacitor C 2 rises gradually by index law.When the voltage on the capacitor C 2 reached upper limit threshold voltage 2/3VCC, the Schmidt trigger upset made 8 pin output low levels, and field effect transistor Q2 turn-offs, and stops to power to main circuit.Make simultaneously triode Q1 enter little electric current power supply state again by change-over circuit, voltage on the capacitor C 2 begins by resistance R 1, R2 discharge, voltage on the capacitor C 2 begins to descend gradually by index law, and this moment, regularly on-off circuit was gone up the electric energy power supply that stores by filter capacitor C1.Because current supply circuit seals in resistance R 3, makes the lower limit threshold voltage drop to 1/30Vcc; Although the voltage passing in time on filter capacitor C1 under little electric current power supply state descends to some extent, as long as voltage greater than the minimum operating voltage 3V of CMOS integrated circuit, just can guarantee regularly on-off circuit operate as normal.When the voltage on the capacitor C 2 is lower than lower limit threshold voltage 1/30Vcc, the Schmidt trigger upset, field effect transistor Q2 is conducting once more, this moment is if rectifier power source is connected on the 220V civil power in limited time, regularly on-off circuit enters second energising cycle, if rectifier power source and 220V civil power are thrown off in limited time, bleeder resistance R5 falls the power consumption on the filter capacitor C1, and regularly on-off circuit returns to initial condition.

The These characteristics that the utility model had can overcome the problem that exists in the aforementioned prior art effectively, has eliminated people prejudice and event that computer games produces are considered, and has tangible economic benefit and social benefit.

Accompanying drawing 1 is a schematic appearance of the present utility model.(the about 1:1 of ratio)

Accompanying drawing 2 is circuit theory diagrams of the present utility model.

Below in conjunction with accompanying drawing embodiment is elaborated:

The shell mechanism of rectifier power source as shown in Figure 1 in limited time, this housing is made up of loam cake 1, base 2, ac power plug 3 and dc power plug 4, wherein ac power plug 3 fuses with base 2, dc power plug 4 is drawn outside the housing by electric wire, and loam cake 1 adopts with base 2 and is threaded.

The circuit of enclosure interior as shown in Figure 2, this circuit is made up of transformer B, rectifier cell D1 to D4, filter capacitor C1 and timing on-off circuit, the 220V civil power by the transformer transformation after, form direct voltage through rectifying and wave-filtering, by the control of timing on-off circuit, be added to the computer games main circuit, behind energized one setting-up time, stop to the main circuit power supply, but through automatic recovery of power supply ability behind another setting-up time.

In above-mentioned timing on-off circuit, the RC charging and discharging circuit adopts resistance R 1, R2 to connect with electric capacity R2, the other end of resistance R 1 is received on output 8 pin of change-over circuit with the positive pole of diode D5, the negative pole of diode D5 links to each other with contact between resistance R 1, the R2 through short-circuit block DL, resistance R 2 links to each other with input 13 pin of change-over circuit with the contact of capacitor C 2, and the other end of capacitor C 2 links to each other with input ground.

Change-over circuit can adopt CD40106 or 74H,C14 six Schmidt triggers, its upper limit threshold voltage is 2/3Vcc, the lower limit threshold voltage is 1/3Vcc, its three Schmidt trigger inputs, 1,3,5 pin are connect input ground with negative pole 7 pin, other three Schmidt triggers adopt 12 pin to be connected with 11 pin, the chain type connected mode that 10 pin are connected with 9 pin, and 8 pin are the output of change-over circuit, 13 pin are the input of change-over circuit, and anodal 14 pin of this chip are powered by micro-current switch circuit.

Micro-current switch circuit is to adopt resistance R 3 in parallel with PNP triode Q1, contact between the emitter of triode Q1 and the resistance R 3 connects positive supply, the contact of the other end of collector electrode and resistance R 3 connects anodal 14 pin of Schmidt trigger, and base stage crosstalk resistance R4 connects output ground.

The semiconductor element Q2 of control main circuit break-make can adopt field effect transistor, and its grid connects 12 pin and 11 pin of Schmidt trigger, and source electrode connects output ground, and drain electrode connects input ground.Bleeder resistance R5 is connected across between positive supply and the output ground.

Resistance R 1 in the RC charging and discharging circuit, R2 is provided with by 1:1, when negative pole and the resistance R 1 of short-circuit block DL with diode D5, when the contact between the R2 connects, charging interval is 1 unit interval, charging interval is 2 unit interval when it is opened a way, then fix discharge time, if resistance R 1 is replaced to potentiometer, its running point connects the negative pole of diode D5, then conduction time can be adjustable continuously in 1 unit interval unit interval to 2, if remove diode D5, power-off time was directly proportional with corresponding conduction time, if short-circuit block DL is with source electrode and the drain short circuit of field effect transistor Q2, common rectifier power source of rectified current source image is the same in limited time for this, can continuously power to the computer games main circuit.

In the circuit of above-mentioned whole power supply in limited time, the optional 8.5V/10W type of transformer B transformer, rectifier cell D1 to D4 can select for use 4 rectifier diode 1N4001 bridge-types to connect, also can select 1A/50V type silicon bridge for use, filter capacitor C1 selects the 2000uF/16V electrochemical capacitor for use, capacitor C 2 is selected the 1000uF/16V electrochemical capacitor for use, select resistance R 1=R2=3M, R3=5.1M, R4=300K, R5=4.7K, diode D5 selects 2CK13 for use, triode Q1 selects 9015 model PNP triodes for use, and field effect transistor Q2 selects the IRF611 model for use, and change-over circuit adopts CD40106 six Schmidt trigger integrated circuit (IC) chip.

The rectifier power source of according to said method realizing in limited time, its operating current be less than 4MA, can be divided into 1 hour its conduction time and 2 hours two grades, about 4 hours of power-off time.

Claims

1, a kind of rectifier power source in limited time that is applicable to computer games, its housing is made of loam cake and base, have ac power plug and dc power plug on its base, in circuit, have transformer, rectifier cell and filter capacitor, it is characterized in that having added behind described filter capacitor a regularly on-off circuit, this circuit can be made up of two triodes and the bleeder resistance R5 of the field effect transistor of RC charging and discharging circuit, change-over circuit, micro-current switch circuit, control main circuit break-make or Darlington triode or compound connection.

2, according to the described rectifier power source in limited time of claim 1, it is characterized in that described RC charging and discharging circuit can adopt resistance R 1, R2 and capacitor C 2 to be in series, described resistance R 1, R2 press the 1:1 configuration.

3, according to the described rectifier power source in limited time of claim 1, it is characterized in that described change-over circuit can adopt the Schmidt trigger integrated circuit (IC) chip.

4,, it is characterized in that described micro-current switch circuit can adopt resistance R 3 and PNP triode Q1 to compose in parallel according to the described rectifier power source in limited time of claim 1.