CN2112192U

CN2112192U - Radio recorder and combined speakers protector

Info

Publication number: CN2112192U
Application number: CN 91209784
Authority: CN
Inventors: 任国选
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-08
Filing date: 1991-06-08
Publication date: 1992-08-05

Abstract

The utility model relates to a protecting device for a radio-receiver recorder and a music center, and comprises a timing automatic power-down circuit and an automatic alarming circuit. When the protecting device is used, the circuit of the protecting device is switched on by pressing down a power button, and a luminescent diode emits light. When the protecting device is unused more than 45 seconds, the circuit of the protecting device is automatically shut down, and the automatic alarming circuit sounds to prompt a user to take out a tape. The wattless power consumption of a radio-receiver recorder and a music centre and the damage to transformers in the machines can be avoided by the protecting device. A plug need not to be pulled out because the luminescent diode indicates the position of power on or power down.

Description

Radio recorder and combined speakers protector

This is novel to relate to a kind of electronic protector.

Existing radio cassette player and combination audio do not possess the electric work of autotomying energy; with after do not dial plug for a long time; have the possibility of burning transformer and circuit component; and non-power consumption waste is bigger, in addition, stops behind the recording playback sound forgeing as the tape long period and is placed in the tape storehouse; influence the serviceable life and the recording playback audio fruit of tape, magnetic head; especially to high end audio, because of repair magnetic head difficulty, the magnetic head protection is more important.

This novel purpose provide can cutting off the electricity supply automatically of a kind of and radio cassette player and sound equipment adapted and automatically alarm remind in user's slave the protector of taking-up tape in time.

This novel purpose is to realize like this, lead-in wire connects automatic deenergizing circuit and automatic alarm circuit on interchange lead-in wire that connects radio cassette player (or sound equipment) and ac circuit line, connects power button K1 and contact J11 parallel circuit between the contact of interchange lead-in wire above-mentioned two circuit that connect of radio cassette player.

Automatically the connection of deenergizing circuit is, connect lead-in wire 3 from AC power cord, shunt capacitance C1 and resistance R 1 are in order to dividing potential drop in parallel on the lead-in wire 3, series diode D2 on lead-in wire 3, ground connection behind the positive terminal lead-in wire series diode D1 of diode D2, the negative pole end of diode D2 draws two lines and connects ground connection behind filter capacitor C2 and the voltage stabilizing diode DW1 respectively, above-mentionedly connects and composes a parallel circuit, makes the back circuit obtain a direct supply.Potentiometer W1 dividing potential drop of ac circuit lead-in wire series connection from radio cassette player, connect the A point behind the front portion lead-in wire series capacitance C3 of potentiometer and the diode D4, capacitor C 3 rear ends lead-in wires connects ground connection behind the diode D3, diode D4 rear end lead-in wire connects capacitor C 4 back ground connection, export at the A point behind this parallel circuit voltage multiplying rectifier, connect the base stage of triode BG1 from wiring point A lead-in wire, its grounded emitter, its current collection collection resistance in series R2, connect lead-in wire 3 behind the R3, lead-in wire connects the base stage of triode BG2 between resistance R 2 and R3, its emitter is connected on the lead-in wire 3, ground connection behind its collector series resistance R4 and the potentiometer W2, lead-in wire connects the base stage of triode BG3, its grounded emitter between resistance R 4 and the potentiometer W2, connect lead-in wire 3 behind its collector series resistance R5, this parallel circuit is a multistage amplifier circuit.The pin 4 and 8 of base timing ic IC1 when lead-in wire 3 connects, its

2 and 6 is connected on the lead-in wire 3 after meeting diode D5, its

2 and 6 contact lead connect the collector of triode BG3, its

2 and 6 contact lead connect capacitor C 5 back ground connection, its pin 1 ground connection, pin 3 goes between respectively and connects diode D6 and relay J 1 back ground connection, and this parallel circuit is a timing circuit.

In automatic alarm circuit, from exchanging power supply lead wire 4 shunt capacitance C6 and resistance R 6 dividing potential drops, ground connection behind the lead-in wire 4 connection diode D7, series diode D8 on the lead-in wire 4, ground connection after lead-in wire 4 goes between connection filter capacitor C7 and voltage stabilizing diode DW2 respectively, this parallel circuit provides the galvanic current source for the back circuit.Second docking point of relay J 1 is in parallel with capacitor C 8 at the B point, other end ground connection after the parallel connection, connect lead-in wire 4 behind the B point lead-in wire connecting resistance R7, connect lead-in wire 4 after B point series connection alarm reset button K2 and the resistance R 8, the base stage of triode BG4 connects the B point, its grounded emitter, its collector series resistance R9 is connected on the lead-in wire 4, the base stage of triode BG5 connects the collector of triode BG4, its grounded emitter, connect lead-in wire 4 behind its collector connecting resistance R10, the base stage of switch triode BG6 connects the collector of triode BG5, its emitter and collector is serially connected on the lead-in wire 4, this parallel circuit is a timing switch circuit, termination C point of resistance R 12, other end ground connection, be connected on the lead-in wire 3 of automatic deenergizing circuit behind the C point connecting resistance R11, the base stage of triode BG7 connects the C point, its grounded emitter, connect lead-in wire 4 behind its collector series resistance R13, this parallel circuit is a state control circuit, resistance in series R14 between lead-in wire 4 and the ground wire, R15 and capacitor C 9, lead-in wire 4 connects the pin 8 of oscillating integrated circuit IC2, and its pin 4 connects the collector of triode BG7, the lead-in wire between its pin 7 connecting resistance R14 and the R15, lead-in wire between its

2 and 6 connecting resistance R15 and the capacitor C 9, pin 1 ground connection, its pin 3 is an output terminal, this circuit is an oscillatory circuit.Lead-in wire 4 connects electric capacity 10 back ground connection, the front end of lead-in wire 4 series connection LEDs and resistance R 16 back connecting resistance R17, another termination D point of resistance R 17, the D point connects the base stage that meets triode BG8 after the capacitor C 11, the front end of the emitter connecting resistance R17 of triode BG8, ground connection behind its collector connecting resistance R18, the base lead of triode BG8 connects the collector of triode BG9, the grounded emitter of triode BG9, its base stage connects the D point, connect the D point after the collector terminal of triode BG8 meets piezoelectricity ceramics HTD, this parallel circuit is the alarm condition indication circuit.

Narrate below in conjunction with drawings and Examples.

Fig. 1 is the circuit connection diagram of this protector.

With reference to Fig. 1 is this novel embodiment, and its circuit connects as mentioned above.The time basic timing ic IC1 that adopts in the circuit is NE555, and oscillating integrated circuit IC2 adopts NE555.

When this protector uses; line attachment; the instantaneous power button K1 that presses, radio cassette player 5(or combination audio) and automatically deenergizing circuit 1 just connect AC power, the direct supply that constitutes by capacitor C 1, C2, resistance R 1, diode D1 and D2 and voltage stabilizing diode DW1 then backward circuit direct current is provided.In time base timing circuit; capacitor C 5 begins charging; charging rate is slower; pin 2 and the 6 place's electronegative potentials of time base timing ic IC1; its pin 3 output noble potentials; relay J 1 adhesive, contact J11 energized button K1, circuit will keep 45 seconds of "on" position; in this time; sound-track engraving apparatus should be come into operation, if do not come into operation, then protector will be cut off the electricity supply automatically; come into operation potentiometer W1 in the signal circuit of protector then of radio cassette player is obtained this voltage and increases variable signal; capacitor C 3 in signal circuit; C4 and diode D3; the D4 voltage multiplying rectifier, input is by triode BG1; BG2; the amplifying circuit that BG3 forms, triode BG3 saturation conduction; capacitor C 5 is by becoming rapid discharge than charging battery; the pin 2 of integrated circuit; 6 still locate electronegative potential, still adhesive of relay J 1, radio cassette player operate as normal.

When radio cassette player is stopped using; potentiometer W1 obtains this voltage and reduces signal; triode BG3 ends; capacitor C 5 charging beginnings, after 45 seconds, relay J 1 discharges; contact J11 disconnects; radio cassette player breaks away from power supply, if reuse radio cassette player once more in 45 seconds of capacitor C 5 chargings, then protector can continue to keep the normal power-up state.

Among automatic alarm circuit; DC power supply circuit is by capacitor C 6; C7; diode D8; and stabilivolt DW2 forms; after power-down circuit 1 is cut off the electricity supply automatically; contact J12 disconnects the two ends of timing switch circuit C8; speed was slow after capacitor C 8 began to charge; triode BG4 in the timing switch circuit ends at this moment; triode BG5 conducting; triode BG6 is saturated; timing switch circuit is in "on" position; divider resistance R11 in the state controller; R12 is after power-down circuit 1 disconnects automatically; resistance R 12 both end voltage are 0; triode BG7 ends; the pin 4 of oscillating integrated circuit IC2 is a noble potential; integrated circuit (IC) 2 is an oscillatory regime; the LED flicker is luminous in the alarm indicator; piezoelectric ceramic chip HTD sends interrupted alarm sound; after 1.5 minutes; capacitor C 8 chargings in the timing switch circuit finish; triode BG4 is saturated; triode BG5 ends; triode BG6 is an off state; the state controller circuit of back, oscillatory circuit and alarm display circuit non-transformer, the flash of light of LED and piezoelectric ceramic piece HTD and alarm finish; this moment, each alarm spare indication protector was outage alarm state; if the user in time takes out magnetic after stopping using radio cassette player, click alarm indication reset button K2, alarm and indication stop.

When automatic power-down circuit 1 normal power-up; contact J12 makes capacitor C 8 short circuits in the timing switch circuit, and triode BG4 ends, triode BG5 and BG6 conducting; but because of 12 both end voltage of the resistance R in the state controller are not 0; and make triode BG7 saturated, the pin 4 in the integrated circuit (IC) 2 is an electronegative potential, the failure of oscillations; its pin 3 is an electronegative potential; LED is non-passage of scintillation light, and piezoelectric ceramic piece HTD is sounding not, and this moment, each indication piece indication protector was the normal power-up state.

This protector can cut off the power supply automatically, alarm, and power on/off indication is arranged, favourable protection radio cassette player and combination audio, and need not dial attaching plug when using.

Claims

1, a kind of radio cassette player and combination audio protector; it is characterized in that its connecting circuit on the interchange lead-in wire of radio cassette player 5 and ac circuit line respectively lead-in wire connect automatic deenergizing circuit 1 and play news circuit 2 automatically, parallel connection power supply button K1 and contact J11 between the interchange lead-in wire of radio cassette player 5 and the tie point of above-mentioned two circuits.

2, protector according to claim 1, it is characterized in that being connected to of automatic deenergizing circuit from the capacitor C 1 and the R1 of AC power cord lead-in wire 3 parallel connections in order to dividing potential drop, from lead-in wire 3 series diode D2, ground connection after the front end lead-in wire of diode D2 meets diode D1, ground connection after diode D2 rear end draws two circuits to meet filter capacitor C2 and voltage stabilizing diode DW1 respectively, in above-mentioned parallel circuit, make circuit obtain a direct supply; Ac circuit lead-in wire series connection potentiometer W1 from radio cassette player 5, behind potentiometer W1 anterior lead-in wire series capacitance C3 and diode D4, connect the A point, capacitor C 3 rear ends lead-in wires connects ground connection behind the diode D3, diode D4 rear end lead-in wire connects capacitor C 4 back ground connection, in the output of A point, this circuit is a signal circuit behind the foregoing circuit voltage multiplying rectifier; Connect the base stage of triode BG1 from wiring point A lead-in wire, the grounded emitter of triode BG1, connect lead-in wire 3 behind its collector series resistance R2, the R3, lead-in wire connects the base stage of triode BG2 between resistance R 2 and R3, the emitter of triode BG2 connects lead-in wire 3, ground connection behind the collector series resistance R4 of triode BG2 and the potentiometer W2, lead-in wire connects the base stage of triode BG3 between resistance R 4 and the potentiometer W2, the grounded emitter of triode BG3, connect lead-in wire 3 behind the collector series resistance R5 of triode BG3, this circuit is a multistage amplifier circuit; The pin 4 and 8 of base timing ic IC1 when lead-in wire 3 connects, the pin 2 and 6 of integrated circuit (IC) 1 connects lead-in wire 3 after meeting diode D5, the pin 2 and 6 of integrated circuit (IC) 1 connects the collector of triode BG3, its pin 2 and 6 connects capacitor C 5 back ground connection simultaneously, its pin 1 ground connection, its pin 3 go between respectively and connect diode D6 and ground, relay J 1 back.

3, protector according to claim 1, it is characterized in that being connected to of described automatic alarm circuit 2 from exchanging power supply lead wire 4 shunt capacitance C6 and resistance R 6 dividing potential drops, ground connection behind the lead-in wire 4 connection diode D7,4 series diode D8 go between, lead-in wire 4 lead-in wire respectively connects ground connection behind filter capacitor C7 and the voltage stabilizing diode DW2, and above-mentioned circuit provides the galvanic current source for circuit; Second contact J12 of relay J 1 is in parallel with capacitor C 8 at the B point, other end ground connection after the parallel connection, connect lead-in wire 4 behind the B point lead-in wire connecting resistance R7, B point lead-in wire connects lead-in wire 4 after having connected and having interrogated reset button K2 and resistance R 8, the base stage of triode BG4 connects the B point, its grounded emitter, connect lead-in wire 4 behind its collector series resistance R9, the base stage of the collector connecting transistor BG5 of this triode, the grounded emitter of triode BG5 connects lead-in wire 4 behind its collector connecting resistance R12, the base stage of switch triode BG6 connects the collector of triode BG5, the emitter and collector of triode BG6 is connected on the lead-in wire 4, and this circuit is a timing switch circuit; Termination C point of resistance R 12, an end ground connection is connected on behind the C point connecting resistance R11 on the lead-in wire 3 in the automatic deenergizing circuit, and the C point connects the base stage of triode BG7, and its emission collection ground connection connects lead-in wire 4 behind its collector series resistance R13, and this circuit is a state control circuit; Resistance in series R14, R15 and capacitor C 9 between lead-in wire 4 and the ground wire, the pin 4 of oscillating integrated circuit IC2 connects the collector of triode BG7, lead-in wire between its pin 7 connecting resistance R14 and the R15, lead-in wire between its pin 2 and 6 connecting resistance R15 and the capacitor C 9, its pin 1 ground connection, its pin 3 output connecting resistance R17, its circuit is an oscillatory circuit; Lead-in wire 4 connects capacitor C 10 back ground connection, the front end of lead-in wire 4 serial connection LEDs and resistance 16 back connecting resistance R17, another termination D point of resistance R 17, the D point connects the base stage that meets triode BG8 after the capacitor C 11, the front end of the emitter connecting resistance R17 of triode BG8, ground connection behind the collector connecting resistance R18 of triode BG8, the base lead of triode BG8 connects the collector of triode BG9, the grounded emitter of triode BG9, its base stage connects the D point, connect the D point after the collector terminal of triode BG8 meets piezoelectric ceramic piece HTD, this circuit is the alarm condition indication circuit.