CN2726265Y - Switch for clamps - Google Patents

Abstract

The utility model provides a switch for lamps, comprising a key and an indicating lamp that are arranged on a panel, a circuit board, a wire connecting terminal and a back cover that are arranged behind the panel. The circuit board is provided with a controlling circuit that comprises a triangular-wave generating circuit, an RC integrating circuit and a square-wave generating circuit. The triangular-wave generating circuit and the RC integrating circuit are respectively connected with the square-wave generating circuit, and the square-wave signals whose impulse widths are gradually changed are input a field-effect transistor Q1 that is connected with an electric appliance by the voltage comparator of the square-wave generating circuit. When the switch for the lamps of the utility model is switched on, light rays are slowly changed from dark to bright until brightest; when the switch for the lamps is switched off, the light rays are changed from bright to dark until the switch for the lamps is switched off, the switch for the lamps not only avoids the momentary impact of the great current, but also solves the problems that the abrupt change of the light rays causes the discomfort of the human body in the dark surrounds and when people who switch off lights in dark surrounds leave, people need other light sources, and the indicating lamp can make users quickly know the position of the switch according to the light rays.

Description

A kind of light fixture switch

Technical field

The utility model relates to a kind of light fixture switch, is meant that especially a kind of lighting is with the dark formula switch that gets brighter gradually.

Background technology

Existing wall lighting switch has only two kinds of user modes, promptly open and close, so switch is when opening, it is maximum that the brightness of light fixture just reaches at once, light fixture then extinguishes when closing, and particularly when using night, causes the discomfort of human eye because of the unexpected variation of light in dark surrounds at once.

Dimmer switch can change speed, the establishment scene of light intensity, control switch lamp and carry out the transition to any scene gradually, also can change rate of transition, prolong bulb life, saves electric energy by light modulation by light modulation.But existing dimmer switch in use has its chronic illness, because the illumination that dimmer switch uses potentiometer and controllable silicon to regulate light fixture, be that the user needs its knob of turn in use, the pace of change of lamplight brightness is held voluntarily by the user, therefore the user in use needs the long period brightness of light could be switched to needed brightness gradually by ambient brightness, also need identical process and time when closing light fixture, this makes the process of turning off the light of turning on light cumbersome, is not suitable for modern life rhythm.

Summary of the invention

Goal of the invention of the present utility model provides and a kind ofly lighting is brightened gradually and the switch of deepening gradually.

Designed a kind of light fixture switch according to above-mentioned purpose, comprise the button and the indicator light that are arranged on the panel, the support of back side of panel is provided with circuit board, binding post and bonnet, circuit board is provided with control circuit, this control circuit comprises triangle wave generating circuit, RC integrating circuit and square wave generation circuit, triangle wave generating circuit, the RC integrating circuit connects with square wave generation circuit respectively, voltage comparator by square wave generation circuit relatively after, triangular signal and the control signal that gradually changes are become the square-wave signal that pulse duration gradually changes, the field effect transistor Q that input connects with electrical appliance behind the RC integration ₁

Wherein, triangle wave generating circuit is by operational amplifier U _1AAnd U _1BAnd the resistance R of periphery ₄, R ₅, R ₆And capacitor C ₄Form the operational amplifier U in the triangular wave input square wave generation circuit _1CInverting input.And the RC integrating circuit that matches is by operational amplifier U _1DAnd the resistance R of periphery ₉, R ₁₀, VR ₁And capacitor C ₅Form, power supply is by self-lock switch SW ₁And through resistance R ₉, R ₁₀After the dividing potential drop with U _1DConnect U _1DThe signal of output is through VR ₁And C ₅Enter U behind the integration _1CIn-phase input end.Square wave generation circuit is operational amplifier U _1C, it uses as voltage comparator, and triangular signal and the control signal that gradually changes behind the RC integration are become the square-wave signal that pulse duration gradually changes.The signal of output is via resistance R ₇And capacitor C ₆The circuit of forming is laggard goes into field effect pipe Q ₁This field effect transistor is a NMOS pipe, and the unidirectional pulsation of this pipe after to the bridge rectifier rectification modulated, thereby changes the operating voltage at load two ends.

Because the operating voltage of electronic devices and components is lower, and in order further to improve safety in utilization of the present utility model, power supply circuits adopt the form that is made of step-down rectifying circuit and voltage stabilizing circuit.Power supply circuits can be reduced to power-frequency voltage the operating voltage of using above-mentioned various electronic devices and components, and far below the safe voltage of home electric, thereby guaranteed the fail safe of using.

In order to solve the discomfort that causes human body in the dark surrounds because of the unexpected variation of light, prolong load useful life, designed the utility model.When the utility model conducting, light through one slowly process by dark to bright, until the strongest; When closing, light by bright to dark, until shutoff.Therefore, avoided the moment impact of big electric current, prolonged 2～3 times of useful lifes of load, also solved that turn off the light when leaving will be by the problem of other light sources simultaneously under dark surrounds, and by secretly to bright, can regulate voluntarily to dark process duration by bright.Because of having the indicator light design, the user can know the switch position according to light very soon at night.Getting brighter gradually secretly to open makes the variation of light soft, meets the visual characteristic of human eye, and people's ratio is easier to adapt to, and is applicable to environment such as bedroom, parlor.

Description of drawings

Accompanying drawing 1 is a circuit theory schematic diagram of the present utility model; Accompanying drawing 2 is oscillograms of the present utility model.

Specific embodiments

Invention thinking of the present utility model is to adopt pulse-width modulation (PWM) technology, by exporting a pulse signal that broadens gradually or narrow down gradually, changes the opening state of switching tube, thereby the incandescent lamp of series connection with it is brightened or deepening gradually gradually.

Concrete enforcement structure of the present utility model is a button to be housed, the general LED that has been provided with the indicator light effect above button on switch panel ₁, the self-lock switch SW on this button and the circuit board ₁Interlock, circuit board are installed on the panel support behind, and bonnet is also rack-mount by screw, also is provided with binding post at back-end support.In order to dispel the heat, offer louvre at the periphery of bonnet.

Core of the present utility model is the control circuit on the circuit board, this control circuit comprises triangle wave generating circuit, RC integrating circuit and square wave generation circuit, triangle wave generating circuit, RC integrating circuit connect with square wave generation circuit respectively, voltage comparator by square wave generation circuit relatively after, triangular signal and the control signal that gradually changes are become the square-wave signal that pulse duration gradually changes, the field effect transistor Q that input connects with electrical appliance behind the RC integration ₁, its main points are to have adopted a circuit of being made up of four-operational amplifier.Trend below by signal in the operating process is described in detail.

When the key switch access failure, supply voltage is added in R ₈With light-emitting diode Led ₁On, Led ₁Bright, show that the utility model flush type switch that gets brighter gradually is in and does not work or closed condition.After the energized that pushes button, self-lock switch SW ₁Closure, supply voltage passes through R ₉And R ₁₀Operational amplifier U in the dividing potential drop input square wave amplifying circuit _1D, and and U _1DReference voltage compare, make U _1DThe output high level, this high level is by adjustable resistance VR ₁To capacitor C ₅Charge C ₅Both end voltage raises gradually, and is input to the operational amplifier U in the comparison circuit _1CIn-phase input end.

Triangle wave generating circuit in the circuit directly is communicated with power supply, and this circuit is by operational amplifier U _1AAnd U _1BWith resistance R ₄, R ₅, R ₆And C ₄Form.Triangular wave is amplified into operational amplifier U through the two poles of the earth _1CInverting input, by U _1CThe voltage of importing its in-phase input end and inverting input is compared, thereby export the pulse signal that a pulse duration broadens gradually, and through resistance R ₇And C ₆After the oscillating circuit arrangement of forming, this pulse signal that broadens gradually control NMOS pipe, make its by off state gradually excessively to complete opening state, the incandescent lamp that makes series connection with it brightening gradually.

The course of work of circuit is just in time opposite with opening state when power cutoff, U _1CExport the pulse signal that a pulse duration narrows down gradually, this pulse signal that narrows down gradually control NMOS pipe, make its by opening state gradually excessively to complete off state, so make the incandescent lamp deepening gradually of series connection with it.

Fig. 2 gives and has shown portion waveshape figure of the present utility model.One oscillogram for triangle wave generating circuit output; Two oscillograms for the output of RC integrating circuit; Three is mains waveform figure; Four are the mains waveform figure after the rectification; Five is the waveform (being the signal waveform of triangle wave generating circuit and RC integrating circuit) of two inputs of square wave generation circuit; Six is the waveform of square wave generation circuit output; Seven voltage waveforms for field effect transistor output; Eight voltage waveforms for the output of this switch.Wherein the voltage comparator of the signal of triangle wave generating circuit and RC integrating circuit by square wave generation circuit relatively after, become the square-wave signal that pulse duration changes gradually.The square-wave signal input field effect transistor that this pulse duration changes is gradually modulated the civil power behind over commutation, thereby changes the voltage of this switch output.

Claims (7)

1, a kind of light fixture switch, comprise the button and the indicator light that are arranged on the panel, the support of back side of panel is provided with circuit board, binding post and bonnet, circuit board is provided with control circuit, it is characterized in that control circuit comprises triangle wave generating circuit, RC integrating circuit and square wave generation circuit, triangle wave generating circuit, the RC integrating circuit connects with square wave generation circuit respectively, voltage comparator by square wave generation circuit relatively after, triangular signal and the control signal that gradually changes are become the square-wave signal that pulse duration gradually changes, the field effect transistor Q that input connects with electrical appliance behind the RC integration ₁

2, lamp switch according to claim 1 is characterized in that triangle wave generating circuit is by operational amplifier U _1AAnd U _1BAnd the resistance R of periphery ₄, R ₅, R ₆And capacitor C ₄Form the operational amplifier U in the triangular wave input square wave generation circuit _1CInverting input.

3, lamp switch according to claim 1 is characterized in that the RC integrating circuit is by operational amplifier U _1DAnd the resistance R of periphery ₉, R ₁₀, VR ₁And capacitor C ₅Form, power supply is by self-lock switch SW ₁And through resistance R ₉, R ₁₀After the dividing potential drop with U _1DConnect U _1DThe signal of output is through VR ₁And C ₅Enter U behind the integration _1CIn-phase input end.

4, lamp switch according to claim 3 is characterized in that by U _1CRelatively the signal of back output is via resistance R ₇And capacitor C ₆The circuit of forming is laggard goes into field effect pipe Q ₁

5, lamp switch according to claim 4, thus it is characterized in that the described field effect transistor that unidirectional pulsating voltage after the bridge rectifier rectification is modulated the operating voltage that changes the load two ends is the NMOS pipe.

6,, it is characterized in that with the square wave generation circuit that triangular signal and the control signal that gradually changes become the square-wave signal that pulse duration gradually changes be operational amplifier U as voltage comparator behind the RC integration according to claim 1 or 2 or 3 described lamp switch _1C

7, lamp switch according to claim 1 is characterized in that described power supply circuits are made of step-down rectifying circuit and voltage stabilizing circuit.

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