CN201571235U - Building block type AC film electronic switch - Google Patents

Abstract

The utility model discloses a building block type AC film electronic switch; due to adoption of the circuit design with the structure, an electronic switch with high reliability can be obtained through a simple circuit by adopting fewer components; moreover, the electronic switch has the advantages of smaller occupied volume, lower cost and convenient replacement. When the short circuit of the load accidentally occurs, or the rated current is exceeded, a solid-state switch element in the utility model can be automatically switched off due to electric power shutdown, or be switched off due to self-burning out, thereby guaranteeing subsequent safety or minimal loss of property to the utmost extent.

Description

The cordwood system type AC diaphragm electric switch

Technical field

The utility model belongs to luminous lamp switch control field, especially relates to the touch electronic switch of a kind of film.

Background technology

The existing building electrician's of country standard or standard do not supported the control circuit of " intervention of AC power zero line " electronic switch; Therefore aspect present building trade, electric product standard, installing engineering, consumption of resident, house decoration, market sale, all based on the mechanical switch of manual mode, and those so-called sound, light, magnetosensitive, infrared, vibrations, time-delay, multispectral electronic switch such as rein in, though they also are known as electronic switch, often exist such or such " blemish in an otherwise perfect thing ".At present, can be used in the middle of the technology of Wall electronic switch of alternating current control, especially with the electronic switching circuit of " two-wire system phase line input with output " form work, have the argumentation in " the wireless remote control assembly of based thin film electronic switch ", " singly-bound touching electronic switch " patent except that before the applicant, also do not find both to have adopted thin film switch form panel, again with " two-wire system " pattern, and can occur by the product of triple bond platoon in one 86 series switch inner boxs; Even if in the middle of the existing electronic switch product of part, its controlled power also has bigger restriction, as not controlling the AC voltage more than the 160VA; Its overwhelming majority can not guarantee it in each outage, or when sending a telegram here, its output loading all remains on the actual off state that can not get alternating voltage or electric current again.

The utility model content

The technical problems to be solved in the utility model is, a kind of directly diaphragm electric switch of incoming transport power circuit of high reliability is provided, and it can solve the problems of the technologies described above with less components and parts and simple circuit.

For solving the problems of the technologies described above, the utility model has been taked technical scheme: a kind of cordwood system type AC diaphragm electric switch, comprise thin film switch, pedestal, internal control circuit, described internal control circuit comprises all solid state switching circuit, this circuit is made up of bidirectional thyristor, crystal diode and resistance, AC power is by import other end L2 output from an end L1; The bistable state control circuit, this circuit is made up of CMOS inverter, transistor, capacitor, resistance and thin film switch incoming junction KA, KB; The OFF state power-supply circuit, this circuit is made up of divider resistance, voltage stabilizing didoe and capacitor, at bidirectional thyristor between the off period, give the power supply of bistable state control circuit, when the bistable state control circuit obtains coming from the triggering signal of thin film switch incoming junction KA, KB, form the path that trigger voltage is provided to the bidirectional thyristor G utmost point; The AC energy that comes from power supply phase line L1 is through the input of tie point V1 end, behind diode rectification, the end points GND place that is connected with diode D3, D4, D5 at tie point V3 end produces direct voltage, this voltage is the voltage source of bistable state control circuit, is again that the conducting trigger voltage of bidirectional thyristor produces point; Its route is: on the V3 point that is connected with resistance R 2 by diode D1, D2, via resistance R 2, by the dividing potential drop of R2, on the tie point A of diode D5, because capacitor C1 and voltage stabilizing didoe also connect, its accumulate can be limited by voltage stabilizing didoe, thereby forms the OFF state power supply; ON state power supply holding circuit, this circuit is made up of unidirectional thyristor, transistor and photoelectrical coupler, when the solid-state switching circuits conducting, providing to the bistable state control circuit by suiting of photoelectrical coupler is enough to keep bidirectional thyristor control G and extremely in time adds the electric weight that can make its conducting, when solid-state switch ends, this circuit automatic disconnection; This ON state circuit and OFF state circuit all are incorporated into tie point A in power supply output, diode D5, capacitor C1 and bistable circuit all are their loads; The control of ON state power supply is taken on by CMOS inverter ic 2, when bistable circuit moved, the current potential on CMOS inverter ic 16 pin will conversion between high electronegative potential, because the intervention of transistor Q1, on 2 of CMOS inverter ic 2, electronegative potential when ON state, high potential during OFF state, thus cause when needs are opened, unidirectional thyristor SCR2 short-circuit resistance R2, when needing to close, unidirectional thyristor SCR-2 ends, and transistor Q2, Q3 are provided with when only triggering control as unidirectional thyristor SCR-2; When all solid state switch needs conducting, the trigger voltage that comes from tie point V3, arrive resistance R 3 via unidirectional thyristor SCR-2, form the loop through CMOS inverter ic 2 and end points GND point, electric weight is still arranged in the capacitor C 1, it keeps the needed work electric weight of bistable circuit with continuing, and finishes ON state and keeps.

As a kind of preferred version of cordwood system type AC diaphragm electric switch described in the utility model: the needed working power of described bistable state control circuit is supplied with by OFF state power-supply circuit and ON state power supply holding circuit, described solid-state switching circuits comprises bidirectional thyristor SCR1, crystal diode D1, D2, D3, D4 and resistance R 1, described bistable state control circuit comprises CMOS inverter ic 1, transistor Q1, capacitor C2, C3, resistance R 4, R5, R6 and by thin film switch incoming junction KA, KB:

Described OFF state power-supply circuit, when an end L1 incoming transport power supply phase line and other end L2 connect controlled load, form full-wave rectification bridge by crystal diode D1, D2, D3, D4, transmit electricity to the tie point of crystal diode D1 and D3 and the tie point of crystal diode D2 and D4, the pulsating direct current that formation one is ordered corresponding to GND, the tie point of crystal diode D1 and D2 is a positive voltage, GND is a negative voltage, forms solid-state switch OFF state voltage by crystal diode D3, D4, D5 and capacitor C1 at the bistable circuit power input;

Described ON state power supply holding circuit, when solid-state switch needs conducting, because the conducting at bidirectional thyristor SCR1 two ends, cause crystal diode D1, D2, D3, the alternating voltage that the rectifier bridge that D4 formed obtains significantly reduces, the undertension of its output is to keep the bistable circuit operate as normal, because the existence of resistance R 2, the getable electric charge of capacitor C1 will sharply reduce, at this moment, unidirectional thyristor SCR2 will be under photoelectrical coupler IC2 effect, short-circuit resistance R2, causing it keeps electric weight and changes by unidirectional thyristor SCR2 one end and directly power, because the G utmost point of unidirectional thyristor SCR2 is controlled by transistor Q2, Q3, the B utmost point of transistor Q2 is controlled by the output of photoelectrical coupler IC2 again, and ON state power supply holding circuit is formed in this loop.

As a kind of preferred version of cordwood system type AC diaphragm electric switch described in the utility model: it is additional as falling of capacitor C1 stored charge that formed low pressure pulsating direct current falls in the later thyristor voltage of described bidirectional thyristor SCR1 conducting, and an end that makes resistance R 3 be delivered to CMOS inverter ic 1 power input exists one all the time is enough to guarantee that bistable circuit and operational order are maintained the voltage of operate as normal.

As a kind of preferred version of cordwood system type AC diaphragm electric switch described in the utility model: described internal control circuit has circuit overcurrent protection, solid switch element automatic disconnection when exceeding rated current.

The technical thought that cordwood system type AC diaphragm electric switch and internal circuit unit thereof described in the utility model are adopted is: the working method of " two-wire system, the i.e. input of single cross stream power supply phase line, output "; With the extremely needed less trigger current of unidirectional thyristor control, be generally the microampere order electric current, control via the bistable trigger-action circuit that the universal CMOS inverter is formed, again under the duplicate supply supply circuit OFF state power circuit of forming by other electronic devices and components and the effect of ON state power circuit, allow it be controlled by and be placed in the thin film switch control that exposes on the panel, by manually pushing or the supporting sensing circuit conduction of other form, cause solid-state switch or the conducting that its inside sets in advance or end, thereby realize the designed cordwood system type AC diaphragm electric switch functional purpose of the utility model.Because the solid-state switching circuits in the utility model, the A2 of the bidirectional thyristor that adopt its inside, A1 be the control of the controlled utmost point extremely all, must electricly promptly open, and dead electricity is promptly closed.In the workflow of entire circuit, no matter its " conducting " still is " ending ", neither needs the AC power zero line to get involved, and also do not need to add the power taking loop and just can guarantee its operate as normal, promptly do not have standby or needed electric current when waiting for; Only utilize the voltage stabilizing circuit that falls that it provides for oneself; or the adjustment by relevant capacitor capacity/related resistors resistance; just can rely on from alternating-current power supply and import out connecting to neutral loop formed " leakage " electric current and voltage between phase line and the load; just can guarantee solid-state switching circuits no matter conducting or by the time; as long as the thin film switch that is preset on the outer switch panel obtains or meets turn-on condition, its inner solid-state switch all can normally obtain required condition and work.Take the circuit design of this structure, can adopt less components and parts promptly to obtain the electronic switch of high reliability by simple circuit, and this kind electronic switch takies and mention lessly, cost is also lower, and it is also convenient to change.When meeting load short circuits by chance, or when exceeding rated current, the solid switch element in the utility model dead electricity automatically disconnects, or burns voluntarily and cut off the power supply, with the safety or the loss minimum of the follow-up property that guarantees you to greatest extent.

This utility model also can design or adopt popular paster components and parts at present, further reduced volume, further strengthen the safety factor of major parameter, not only remedied existing mechanical switch, the deficiency of electronic switch, and " building blocks " formula of realization framework, its nearly all functional unit, can start voluntarily by the user, carry out freely replacing, to guarantee people's living needs or demand for security.The utility model can be accomplished generalization, standardization, normalization, the standardization of finished product, assembly, parts, from housing color, panel pattern, material, function etc. after implementing.Make the choice of this miscellaneous goods of switch bigger, personalized characteristics are more obvious, in the future, change as the house decoration style, also can accomplish by parts or change renewal on demand, accomplish that position of switch is old, faded, disliked, bad, go to replace with regard to parts with identical function, just as child plays with building blocks, and irrelevant circuit unit performance how, satisfies consumer's personalization to pursue with maximum possible, perhaps for the needs of secure context.

Description of drawings

Fig. 1 is the circuit diagram of a kind of execution mode of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail, internal circuit unit of the present utility model is partly formed by four:

One, solid-state switching circuits

By bidirectional thyristor SCR1, be specially BT136E, the solid-state switching circuits that crystal diode D1, D2, D3, D4 and resistance R 1 are formed; Its AC power is by the input of L1 end, and L2 holds output.The AC power phase line by the sub-L1 place in circuit of ac power input end assembly after, be divided into two tunnel, one road A2 end that flows to SCR1 automatically; One the road flows to the tie point V1 of D1 negative terminal and D3 anode, whether the conducting of SCR1, be subjected to the control of SCR1-G end, when SCR1-G end does not add when being enough to cause the two-way trigger voltage of SCR1 conducting, not conducting between A2 and the A1, the L2 end of AC power output just can not obtain coming from the AC power of L1, so not output of L2, is equivalent to electronic switch and turn-offs.After the SCR1-G end adds the two-way trigger voltage that can cause the SCR1 conducting, be conducting between A2 and the A1, the L2 end of AC power output will obtain to come from the AC power of A2 end, is equivalent to electronic switch and connects.

Two, bistable state control circuit

By universal CMOS inverter ic 1, concrete model is the CMOS hex inverter, CC4069, transistor Q1, capacitor C2, C3, resistance R 4, R5, R6 and be made up of the bistable state control circuit that tie point KA, the KB of thin film switch input formed; The thin film switch that is arranged on the switch outer panels draws line row by film, is connected to KA, KB in the mode that patches.Bistable state control circuit in this circuit unit, must insert or supply with a direct voltage that meets its operate as normal needs, it could accept to come from the control of thin film switch input, thereby cause the Q1 conducting or end, have only the conducting of Q1 or end, could command other circuit, and the direct incoming transport power circuit of known thin film switch.Its work is the pure resistance form, only when satisfying AC power phase line and AC power output loading and all normally inserted, the dc partial voltage that comes from R2 could be accepted and be stored to its C1 positive terminal, just can on C1, form the voltage that satisfies bistable circuit work of ordering corresponding to GND, also be that IC1 obtains coming from the electric weight that solid-state switch OFF state power supply is exported, this work electric weight could guarantee to keep high potential on the point that No. 1 end points of IC1-A links to each other with C3, because the anti-phase characteristic of IC1,2 ends that are IC1-A are electronegative potential, because 2 ends of IC1-A link to each other with 3 ends of IC1-B, 2,3 ends are idiostatic, 4 ends of IC1-B are high potential, and the like, 6 ends of IC1-C are electronegative potential just, the B end of Q1 also is an electronegative potential, Q1-C, just not conducting between the E.L1 just is subjected to the obstruct of Q1 via V1 to D1 and V3, R2, R3, IC2-1, the formed control loop of 2 pin, does not constitute the condition that causes its conducting, so not conducting between the A2 of SCR1 and the A1.Being equivalent to electronic switch turn-offs.

Because R6 is connected on the 5 pin lines of 4 pin of KA and IC1-B and IC1-C, the current potential on this tie point will be identical with the 1 pin current potential of IC1-A, also be high potential.Because resistance R 4 is connected between 9 pin of the Q1-C utmost point and C2 and IC1-D, as Q1-C very during high potential, 9 pin of IC1-D also are high potential, according to inverter characteristics, 8 pin also are electronegative potential, the corresponding access point KB of another of thin film switch input current potential will be identical with the 8 pin current potentials of IC1-D, also be electronegative potential.Manual transducer on being arranged on housing face-plate obtains pushing when instructing of operator, the KA end that also promptly is equivalent to the thin film switch input is communicated with the KB end, because the KB end links to each other with 8 pin of IC1-D, the KA end links to each other with 1 pin of IC1-A, the high potential that is formed at 1 pin of IC1-A by C3 is to 8 pin " discharge " of IC1-D, IC1-A obtains anti-phase, thereby it is anti-phase to drive IC1-B and IC1-C, the Q1-B utmost point obtains high potential, make conducting between Q1-C and the Q1-E, the Q1-C current potential descends, and the 2 pin current potentials of IC2 descend, and IC2 gets electric work.C2 discharges to GND by R4, Q1, the 9 pin current potential step-downs of IC1-D, and 8 pin current potentials uprise to the current potential near the IC1 working power.And be retained to the arrival of next trigger action.

When needs turn-offed the alternating voltage of L2 end, the operator was equivalent to artificial the connection or short circuit KA and KB then by the same thin film switch press points that is pressed on the electronic switch guidance panel; The corresponding points current potential of IC1-A, B, C, D is simultaneously controlled anti-phase, recovers the output AC voltage off state of L2 end.

Three, OFF state power-supply circuit

Formed by voltage stabilizing didoe D5, divider resistance R2 and capacitor C1; To supply with bistable state control circuit and solid-state switch SCR1 circuit OFF state power supply is main purpose; Between the off period, guarantee their normal power supply at SCR1.When L1 incoming transport power supply phase line and L2 connect controlled load, the full-wave rectification bridge of forming by D1, D2, D3, D4; Transmit electricity to tie point V1, the D2 of D1 and D3 and the tie point V2 of D4, forming a pulsating direct current V3 of ordering corresponding to GND is " just " voltage, and GND is a negative voltage.By D3, D4, D5 and C1, at bistable circuit power input formation solid-state switch OFF state voltage.The people " bears " this two tie points for short circuit its " just "; can cause the direct conducting of SCR1; when fault, can be used for checking whether normal whether the work of solid-state switching circuits or components and parts lost efficacy in advance, and this voltage will guarantee the need of work of bistable circuit when OFF state.

Four, ON state power supply holding circuit

By unidirectional thyristor SCR2, transistor Q2, Q3, and the power supply holding circuit of 4,5 ends of photoelectrical coupler IC2 composition solid-state switch ON state need of work, the concrete model of IC2 is photoelectrical coupler MOC4021.By the suiting or end of IC2, when the solid-state switch conducting, keep supplying with bistable state control circuit one and enough keep SCR1-G and extremely in time add the electric weight that can make its conducting.Solid-state switch by the time, this partial circuit will automatic disconnection or is withdrawn.When solid-state switch needs conducting, or when load provides AC power, because the conducting between SCR1-A2 and the A1, cause D1, D2, D3, the alternating voltage that the rectifier bridge that D4 formed obtains significantly reduces, the voltage of its output, sometimes be not enough to keep bistable circuit operate as normal wherein, because the existence of R2, the getable electric charge of C1 will sharply reduce, at this moment, SCR-2 will be under the IC2 effect, short circuit R2 causes it and keeps electric weight and change by the directly power supply of SCR2-A end, because the G utmost point of SCR-2 is controlled by Q2, Q3, the Q2-B utmost point is controlled by IC2-4 again, 5 outputs are so this loop has just been formed the ON state power-supply circuit.

The utility model utilizes the later thyristor voltage of SCR1 conducting to fall formed low pressure pulsating direct current at internal circuit unit, it is additional to be used as falling of C1 stored charge, cause the left end of R3, promptly be delivered to the IC1 power input, existing one all the time is enough to guarantee that bistable circuit and operational order are maintained the voltage of operate as normal.

Having only the people is when touching the same thin film switch press points that is located on the electronic switch guidance panel, and by the conversion of interlock circuit, the control voltage that just can cause SCR1-G extremely to go up adds or withdraws from, and whether the alternating voltage of decision A2 end flows to A1.When it turn-offs, bistable electro route OFF state circuit supply, when its conducting, bistable circuit changes by the ON state circuit supply.Because the existence of C1 and energy storage effect, the difference between them when conversion only can not be discovered with people's naked eyes.No matter which kind of state solid-state switch works in, bistable state control circuit in the utility model internal circuit unit, needed working power, or terminal voltage is all in the C1 inner accumulated, be divided into three the tunnel then, one the road flows to C3, by C3, provides the triggering bistable circuit needed operating voltage to thin film switch; One the road flows to 14 pin of cmos circuit IC1, is the power supply input pin of IC1, to IC1 power supply, can normally obtain operating voltage in the prescribed limit with the bistable circuit that guarantees its composition.One the road flows to R3, flows to 1 pin of photoelectrical coupler IC2 by R3, flows to 2 pin through 1 pin of IC2, again through the C of the transistor Q1 utmost point, by the E best " reference point is GND " of Q1, because in same electronic circuit, its GND is connected.Meet this GND, just equal to insert those GND.So as long as the Q1-B utmost point obtains being higher than the current potential of GND, and approach the high potential of IC1 working power, Q1 is conducting, make the G utmost point of SCR1 and R1 form the loop, it is electric to realize that the SCR1 control G utmost point gets, thereby forms the conducting between A1 and the A2, is equivalent to the electronic switch conducting.

Claims (3)

1. cordwood system type AC diaphragm electric switch, comprise thin film switch, pedestal, internal control circuit, it is characterized in that: described internal control circuit comprises all solid state switching circuit, this circuit is made up of bidirectional thyristor, crystal diode and resistance, AC power is by import the other end (L2) output from an end (L1); The bistable state control circuit, this circuit is made up of CMOS inverter, transistor, capacitor, resistance and thin film switch incoming junction (KA, KB); The OFF state power-supply circuit, this circuit is made up of divider resistance, voltage stabilizing didoe and capacitor; Between the off period, give the power supply of bistable state control circuit at bidirectional thyristor, when the bistable state control circuit obtains coming from the triggering signal of thin film switch incoming junction (KA, KB), form the path that trigger voltage is provided to bidirectional thyristor (G) utmost point; The AC energy that comes from power supply phase line (L1) behind diode rectification, locates produce direct voltage at the end points (GND) that tie point (V3) end is connected with diode (D3), (D4), (D5) through the input of tie point (V1) end; ON state power supply holding circuit, this circuit is made up of unidirectional thyristor, transistor and photoelectrical coupler, when the solid-state switching circuits conducting, providing to the bistable state control circuit by suiting of photoelectrical coupler is enough to keep bidirectional thyristor control G and extremely in time adds the electric weight that can make its conducting, when solid-state switch ends, this circuit automatic disconnection, this ON state circuit and OFF state circuit all are incorporated into tie point (A) in power supply output; The control of ON state power supply is taken on by CMOS inverter (IC2), and when bistable circuit moved, the current potential on CMOS inverter (IC1) 6 pin will conversion between high electronegative potential, 2 of CMOS inverter (IC2) high potential when electronegative potential, OFF state when ON state; Thereby cause when needs are opened, unidirectional thyristor (SCR2) short-circuit resistance (R2), when needing to close, unidirectional thyristor (SCR-2) ends, and when all solid state switch needs conducting, comes from the trigger voltage of tie point (V3), arrive resistance (R3) via unidirectional thyristor (SCR-2), form the loop through CMOS inverter (IC2) and GND point, in the electric capacity (C1) electric weight is arranged still, it will continue to keep the needed work electric weight of bistable circuit.

2. cordwood system type AC diaphragm electric switch according to claim 1, it is characterized in that: it is additional as falling of capacitor (C1) stored charge that formed low pressure pulsating direct current falls in the later thyristor voltage of described bidirectional thyristor (SCR1) conducting, and an end that makes resistance (R3) be delivered to CMOS inverter (IC1) power input exists one all the time is enough to guarantee that bistable circuit and operational order are maintained the voltage of operate as normal.

3. cordwood system type AC diaphragm electric switch according to claim 1 is characterized in that: described internal control circuit has circuit overcurrent protection, solid switch element automatic disconnection when exceeding rated current.

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