CN2377770Y

CN2377770Y - High-power self-locking tough flame-proof switch

Info

Publication number: CN2377770Y
Application number: CN 99209448
Authority: CN
Inventors: 何志扬
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-19
Filing date: 1999-04-19
Publication date: 2000-05-10
Anticipated expiration: 2009-04-19

Abstract

The utility model relates to a high-power self-locking touch anti-explosion switch, which is composed of an induction ring, a signal input circuit, a starting-up clear circuit, a micro triggering unidirectional controllable silicon switch circuit, a high-power bidirectional controllable silicon switch circuit, etc. A secondary driving means that microcurrent controls low current and high current is driven by the low current is adopted; luminous diode glue is arranged in a hole of the induction ring; induction ring glue is arranged in a hole of a switch panel. The reasonable connection of elements C< 4 >, R< 5 >, IC< 1 >, R< 3 >, etc. completes a self-locking function; therefore, the utility model achieves the good effect of single-wire installation, single-key touch, self-locking performance, high power, anti-explosion performance and safety.

Description

High-power self-locking touches flame-proof switch

The utility model relates to a kind of lamp switch that opens and closes light fixture, and especially a kind of single line is installed, touch high-power explosion-proof switch with auto-lock function.

Known up-to-date " the touch lamp switch of singly-bound " sees " practical lamps and lanterns of electron making " book (People's Telecon Publishing House, Chen Youqing work, version in 1997) at present.Its electronic structure is seen accompanying drawing 1.This switch externally has only two leading-out terminals, and wiring and normal domestic switch identical (being that single line is installed) are installed, and is convenient to install.As long as staff touches electrode slice, just can open and close light fixture.This switch is contactless, no-spark, and safety anti-explosive, more advanced.But following some deficiency is arranged in the design: when sending a telegram here after 1. having a power failure, controlled light fixture can not be locked in closed condition again.2. driving power is little, generally at 60W, if directly the small unidirectional controllable silicon in the circuit is replaced with high-power one-way SCR, then because the required trigger current of high-power one-way SCR is big, just this circuit cisco unity malfunction.3. the induced electricity pole piece is to be cut into 20 * 20mm with black sheet iron ²Square, be stained with glue on switch panel, trouble is installed, aesthetic property is poor.4. need further to increase safety and reliability measure.

The purpose of this utility model provides a kind of electronic switch, and it can not only accomplish that singly-bound touches, and single line connects, and can reach: the energy positive lock in off position when sending a telegram here after the power failure again; Driving power can reach thousands of watts; The induced electricity pole piece is designed to inductance loop, and is easy to assembly, good looking appearance; And fail safe, reliability are all improved a lot than prior art.

The purpose of this utility model is achieved in that in the insulating cover behind switch panel, inductance loop, integrated circuit CMOS type double D trigger, one-way SCR, bidirectional triode thyristor etc. are electrically connected in proper order.One start clear circuit is arranged: at D ₂R ₂End connects low-tension supply by an electric capacity, and again by a grounding through resistance, its time constant is greater than with D ₁The time constant of the monostable trigger-action circuit of forming for the center.At the output of low-tension supply, increase by one over the ground and discharge electricity group (underload), this discharges resistance just, after make having a power failure again before the incoming call, allow the charge energy that stores on the filter capacitor discharge rapidly, when sending a telegram here again after the power failure, the voltage of low-tension supply can rise from null value, thereby gives D effectively ₂Zero clearing reaches the purpose of self-locking.

On the major loop of little triggering one-way SCR, having increased with the great power bidirectional controllable silicon is the power driving circuit that the center is formed.The trigger current of little triggering one-way SCR is taken from low-tension supply, its value is less than 200 μ A (only needing about 20 μ A usually), (this power supply is directly taken from civil power and the on state current after its conducting can reach 1A, can't help low-voltage circuit provides), link to each other with a great power bidirectional controllable silicon through triggering resistance with so big electric current, can trigger the enough big bidirectional triode thyristor of any on state current, thereby can drive thousands of watts load, formed little electric current and driven little electric current, little electric current is controlled the two-stage drive mode of big electric current again.

Electrode slice of the present utility model designs more ingeniously.It is an inductance loop that the center is with holes, and the effective glue glue of light-emitting diodes is in the hole of inductance loop; Beaten a hole in switch panel central authorities again, with inductance loop together with light-emitting diode again glue go in the hole on the switch panel.Like this, as long as staff is had a touch with light-emitting diode, just touched inductance loop in fact simultaneously, the induced current of human body reaches the purpose of touch just from the input of inductance loop by buffer circuit injection CMOS integrated circuit.But seeming in the switch appearance, only is to have touched indicator light

Reliable for guaranteeing circuit safety, the utility model has also been taked following measure:

1. at double D trigger output Q ₂With connected between the trigger electrode of one-way SCR a current-limiting resistance and a diode, finally reached after controlled light fixture is lighted, improved the voltage of low-tension supply, guaranteed the integrated circuit reliably working.

2. the trigger electrode of one-way SCR over the ground adjunction an electric capacity and a resistance, increased antijamming capability.

3. dropping resistor is in series with the resistance of two numbers+K Ω, in case a resistive short, another still plays the step-down effect.

4. be in parallel with resistance and light-emitting diode.In case light-emitting diode burns out, but circuit operate as normal still.And reach the energising back: when controlled light fixture did not work, indicator light was bright; When controlled light fixture was bright, indicator light did not work.Promptly reached the effect of indicating controlled light fixture light on and off.The place helpful (as the door head lamp) that this is not fitted together for those switches and light fixture.

5. the input at inductance loop and integrated circuit has designed filter circuit, has strengthened antijamming capability.

Owing to adopted such scheme, make the utility model reach single line, singly-bound, touch, self-locking, high-power, safe and reliable good result.

Below in conjunction with drawings and Examples, the utility model is described in further detail:

Fig. 1 is " the touch lamp switch of singly-bound " electrical schematic diagram

Fig. 2 is an inductance loop mounting structure schematic diagram

Fig. 3 is an electric theory diagram of the present utility model

Fig. 4 is an electrical schematic diagram of the present utility model

Among Fig. 2: the panel of A. switch; B. printed circuit board; C. inductance loop; LED ₁. indicator light

Among Fig. 3: 1. great power bidirectional reverse-blocking tetrode thyristor circuit; 2. rectification circuit; 3. little triggering one-way SCR switching circuit; 4. step-down current limliting, luminous indicating circuit; 5. voltage regulation filtering and residual voltage discharge circuit; 6. signal input and disturbing wave absorb circuit; 7. monostable anti-jamming circuit; 8. bistable and start clear circuit; H ₁Controlled bulb; G. inductance loop; LED ₁. indicator light; R ₆. current-limiting resistance.

Among Fig. 4: C _1-8. electric capacity; R _1-13. resistance; VD _1-4, VD _6-7Diode; VD ₅Voltage-stabiliser tube; IC ₁. integrated circuit CMOS type double D trigger; VS ₁. little triggering one-way SCR; SCR ₁. the great power bidirectional controllable silicon.

Annexation embodiment illustrated in fig. 4 is as follows:

1. great power bidirectional reverse-blocking tetrode thyristor circuit.SCR ₁T ₁, T ₂The utmost point meets electric main and illuminating lamp H respectively ₁R ₁₃, C ₈After the parallel connection, be connected on SCR ₁T ₁With the G utmost point, play the sample trigger effect.R ₁₂, C ₇Be connected on T after the series connection ₁With T ₂Between the utmost point, absorb disturbing wave, the protection controllable silicon.

2. rectification circuit.D _1-4Be connected into bridge rectifier, input and SCR ₁G, T ₁Link to each other, output cathode meets VS ₁Anode, negative pole meets VS ₁Negative terminal.

3. little triggering one-way SCR switching circuit.C ₆, R ₇Be connected on VS after the parallel connection ₁G and the K utmost point between, IC ₁Output signal end through R ₆Current limliting, VD ₆The unidirectional conducting of step-down meets VS ₁G end.

4. step-down current limliting, voltage regulation filtering and residual voltage discharge circuit.The low-tension supply of control loop is taken from VS ₁Two ends.R ₁₁, R ₁₀Be connected on after the series connection between high pressure and the low pressure, play the step-down metering function.C ₅Filtering, VD ₅Voltage stabilizing provides low-tension supply to control loop.R ₈Discharge resistance for leaking, can discharge residual voltage at any time, a termination C ₅Positive pole, another termination C ₅Negative pole.

5. signal input and disturbing wave absorb circuit.Signal input resistance R ₁, R ₂After the series connection, a termination inductance loop G, another termination IC ₁CP ₁End.C ₁, C ₂, R ₂Connect into the π type again, constitute disturbing wave and absorb circuit.Divider resistance R ₃Be connected on IC ₁CP ₁And between the ground, play the dividing potential drop effect, the touch sensitivity of the whole switch of scalable.

6. monostable anti-jamming circuit.IC ₁D ₁Connect the positive pole of low-tension supply, S ₁Ground connection, R ₄, C ₃Series connection is at Q ₁And between the ground, its mid point meets IC ₁4 pin be R ₁End, VD ₇With R ₄Parallel connection can discharge C ₃On residual voltage.

7. bistable and start clear circuit.IC ₁Q ₂With D ₂Link to each other S ₂Ground connection.C ₄With R ₅Be connected on after the series connection between low-tension supply and the ground, the mid point of its series connection meets IC ₁R ₂End.

Claims

1 one kinds of high-power self-lockings touch flame-proof switch to be made up of inductance loop, signal amplification circuit, start clear circuit, little triggering one-way SCR switching circuit, rectification circuit, great power bidirectional reverse-blocking tetrode thyristor circuit etc., it is characterized in that: C ₄With R ₅Be connected on after the series connection between low-tension supply and the ground, the mid point of its series connection meets IC ₁R ₂End; R ₈A termination C ₅Positive pole, another termination C ₅Negative pole.

2 according to the described soft-touch control of claim 1, it is characterized in that: the effective glue glue of light-emitting diodes is in the hole of inductance loop, and inductance loop glue is in the hole of switch panel.

3 according to the described soft-touch control of claim 1, it is characterized in that: R ₁₂, C ₇Meet SCR after the parallel connection ₁T ₂With the G utmost point; R ₁₃, C ₈Meet SCR after the series connection ₁T ₂With T ₁The utmost point.

4 according to the described soft-touch control of claim 1, it is characterized in that: R ₇, C ₆Be connected on VS after the parallel connection ₁G and the K utmost point between, IC ₁Q ₂End is through R ₆, VD ₆Meet VS ₁The G utmost point.

5 according to claim 1 described touch open also, it is characterized in that: R ₁, R ₂Series connection is at inductance loop G and IC ₁CP ₁End, C ₁, C ₂, R ₂Be linked to be the π type again, R ₃Be connected on CP ₁And between the ground.