CN201039537Y - Step down light adjusting device with adjustable step down time - Google Patents

Abstract

The utility model discloses a darkening-down light adjusting device with adjustable darkening-down time. The light adjusting device not only can be taken as common light adjusting lamp used for daily-life and can become darker and darker till power off within specified time, but also can meet the needs of infant sleep. The light adjusting device comprises a controlling button, an impulse generating circuit, a light adjusting controlling circuit, a voltage-reducing rectifying and filtering circuit, a light adjusting circuit and a light bulb load. An AC power supply is connected with the voltage-reducing rectifying and filtering circuit, the controlling circuit and the light bulb load. The controlling circuit is mutually connected with the light bulb load. The output terminal of the voltage-reducing rectifying and filtering circuit is jointed into the impulse generating circuit and the light adjusting controlling circuit. The output terminal of the impulse generating circuit is jointed into the light adjusting controlling circuit, too. And the output terminal of the light adjusting controlling circuit is jointed into the light adjusting circuit.

Description

Fade dimming device with adjustable fade time

technical field

The utility model relates to a dimming device, in particular to a dimming dimming device with adjustable dimming time for household lighting fixtures.

Background technique

At present, most of the dimming lamps on the market can only adjust the brightness of the bulb manually, and most of the dimming lamps cannot realize the dimming function; although some lamps can realize the dimming function, but its dimming time It is generally very short, and the dimming time cannot be adjusted; especially infants and young children, they are generally afraid of the dark, but it is troublesome to turn off the light after turning on the light every time they fall asleep, but those with dimming function Due to the short dimming time of the dimming lamps, the infants are extinguished before they are fully asleep, causing the infants to be woken up again, which cannot meet the infants' sleep needs.

Utility model content

The technical problem to be solved by the utility model is to provide a dimming dimming device with adjustable dimming time. extinguished, and can meet the needs of infants and young children to fall asleep.

The technical problem to be solved by the utility model can be realized through the following technical solutions:

A dimming dimming device with adjustable dimming time, characterized in that it comprises:

a control button;

a pulse generating circuit providing a fade-out pulse signal;

A dimming control circuit for controlling the dimming of the dimming circuit;

A step-down rectification filter circuit for converting the AC power supply into a DC power supply for use by the pulse generation circuit and the dimming control circuit;

A dimming circuit and a light bulb load for dimming a pair of light bulb loads;

The AC power supply is connected to the step-down rectification filter circuit, the control circuit and the bulb load, the control circuit and the bulb load are connected to each other, and the output end of the step-down rectification filter circuit is connected to the pulse generation circuit and the regulator through the control button. A light control circuit, the output end of the pulse generating circuit is connected to the light adjustment control circuit, and the output end of the light adjustment control circuit is connected to the light adjustment circuit.

The control button is a rotatable two-section button, which includes an upper panel and a lower mounting plate. Several control switches and a rotary adjustable resistor are fixed on the lower mounting plate. The corresponding rotary adjustable resistor on the upper panel A through hole is provided at the position, and a button is provided in the through hole, and the lower end of the button is set on the adjustment rod of the rotary adjustable resistance, and the eccentric sleeve on the adjustment rod is provided with a connecting piece, and the connecting piece is located at above the contacts of the control switch.

The control switch is a micro switch.

The connecting piece is a connecting rod.

The principle of the dimming dimming device with adjustable dimming time of the present utility model is as follows:

The 220V AC power supply is stepped down, rectified and filtered by the step-down rectification filter circuit to obtain a 5V DC power supply for the pulse generation circuit and the dimming control circuit. The dimming control circuit is provided; when the control button is closed, the pulse generating circuit works and outputs a square wave signal to control the dimming control circuit to enter the dimming state, and the dimming time depends on the frequency of the square wave signal, which can be changed by rotating the control button The frequency of the square wave signal plays the role of adjusting the dimming time; when the control button is disconnected, the pulse generating circuit stops working and outputs a high-level signal to shield the dimming function of the dimming control circuit. The circuit can be used as a general dimming lamp to realize the purpose of the utility model.

The utility model has the following advantages:

It can be used according to the function of a general dimming lamp to adjust the brightness of the light. You can turn on the dimming switch when the lamp is turned on, and select the dimming time, and the light will gradually go out within the selected time; in this state, if you need At night, you only need to press the button to turn on the lamp normally; there are various functions, one-button control, and easy operation. It can especially help infants and young children fall asleep at ease, eliminate the fear of the dark, improve sleep quality, and help growth.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a block diagram of the utility model:

Fig. 2 is a schematic circuit diagram of the utility model;

Fig. 3 is a structural schematic diagram of the rotatable two-section button of the present invention.

Detailed ways

As shown in Figure 1 and Figure 2, a dimming dimming device with adjustable dimming time, it includes: control button 6, pulse generating circuit 1, dimming control circuit 2, step-down rectification filter circuit 5, dimming Circuit 3 and bulb load 4.

Pulse generating circuit 1 is composed of chip U1, resistor R1 and capacitor C2; resistor R1 is connected in parallel to pins 2 and 7 of chip U1, pin 2 of U1 is respectively connected to pin 6 and capacitor C2, and the other end of capacitor C2 is connected to pin 7 of chip U1. After pin 1 is connected, it is connected to the dimming control circuit 2; pin 4 and pin 8 of the chip U1 are connected to each other and then connected to the control button 6, and pin 7 of the chip U1 is also connected to the control button 6; pin 3 of the chip U1 is connected to the control button 6. into the dimming control circuit 2.

Dimming control circuit 2 is composed of chip U2, resistors R2, R4, R5, capacitors C3, C4 and diode D2; pin 2 of chip U2 is connected to pin 3 of chip U1 in pulse generating circuit 1, and pins 6 and 7 of chip U2 After being connected to each other, they are respectively connected to the pin 1 of the chip U1 in the pulse generating circuit 1, the control button 6 and the step-down rectification filter circuit 5; the pin 1 of the chip U2 is respectively connected to the capacitor C3, C4, the negative pole of the diode D2 and the resistor R2. In the control button 6, the other end of capacitor C3 is connected to pin 3 of chip U2, and pin 4 of chip U2 is respectively connected to the other end of capacitor C4, the anode of diode D2 and resistor R4, and the other end of resistor R2 is connected to pin 5 of chip U2. The back of the pin is connected to the control button 6, and the other end of the resistor R4 is connected to the step-down rectification filter circuit 5; the 8-pin of the chip U2 is connected to the dimming circuit 3 through the resistor R5.

Step-down rectification and filter circuit 5 is composed of resistor R3, capacitor C1, voltage regulator tube Z and diode D1; capacitor C1 and voltage regulator tube Z are connected to each other and connected to the anode of diode D1, control button 6 and chip in dimming control circuit 2 respectively In pins 6 and 7 of U2, the negative pole of the regulator tube Z is connected to the other end of the capacitor C1, and then connected to the control button 6, the dimming circuit 3 and the L terminal of the 220V AC power supply; the negative pole of the diode D1 is connected to the dimming terminal through the resistor R3. Resistor R4 in the light control circuit 2, one end of the bulb load 4 and the N end of the 220V AC power supply.

As shown in Figure 3, the control button 6 is a rotatable two-section button, which includes an upper panel 61 and a lower mounting plate 62, on which microswitches AN1, AN2 and rotary adjustable resistors are installed on the lower mounting plate 62, the rotation can be The adjustable resistance is composed of a switch S and a potentiometer W; a through hole 611 is provided at the position corresponding to the potentiometer W on the upper panel 61, and a button 63 is arranged in the through hole 611, and the lower end of the button 63 is set on the adjustment of the potentiometer W and the switch S On the rod, the eccentric set on the adjusting rod is equipped with a connecting rod 64, which is located above the contact ends of the micro switches AN1 and AN2; one end of the switch S is respectively connected to one end of the potentiometer W and pin 8 of the chip U1 in the pulse generating circuit 1 , the other end of potentiometer W is connected to pin 7 of chip U1 in pulse generating circuit 1; the other end of switch S is respectively connected to pin 1 of chip U2 in dimming control circuit 2 and pin 1 of micro switch AN2, micro switch AN2 Pin 2 of the micro switch AN1 is connected to one end of the micro switch AN1, pins 6 and 7 of the chip U2 in the dimming control circuit 2, and the positive pole of the voltage regulator tube Z in the step-down rectification filter circuit 5; the other end of the micro switch AN1 is connected to the dimming The pin 5 of the chip U2 in the control circuit 2 and the pin 3 of the micro switch AN2 are connected to the negative electrode of the regulator tube Z in the step-down rectification filter circuit 5 .

Dimming circuit 3 is a bidirectional thyristor BG, its control terminal is connected to resistor R5 in dimming control circuit 2, and its connection terminal is respectively connected to L terminal of 220V AC power supply and bulb load 4; 97A6 can be selected according to the load power (about 1A), TLC336A (about 3A), BT136-500D (about 6A) models, the principle of selection is that the trigger current should be less than 25mA.

The bulb load 4 is a bulb L, and the bulb L can be directly selected from a resistive tungsten lamp or a halogen tungsten lamp, and its power can be selected according to needs, but must match with the triac BG.

The 220V AC power supply is stepped down by the resistor R3, rectified by the diode D1, stabilized by the voltage regulator Z and filtered by the capacitor C1 to obtain a 5V DC voltage for use by the chip U1 in the pulse generation circuit 1 and the chip U2 in the dimming control circuit 2.

When the switch S is closed, the pin 3 of the chip U1 in the pulse generating circuit 1 outputs a continuous square wave signal, which is used by the pin 2 of the chip U2 in the dimming control circuit 2, and its frequency is determined by the potentiometer W, the resistor R1, and the capacitor C2 decides that the potentiometer W can adjust its frequency within a certain range, so as to adjust the fading time; when the switch S is turned off, it stops working because the 8 pins of the chip U1 have no working power, and its 3 pins output A high-level signal keeps the pin 2 of the chip U2 always at a high level, and the phase angle of the trigger pulse output by the pin 8 of the chip U2 remains unchanged. At this time, it can be used as a general dimming lamp.

When the control button 6 is pressed halfway, the micro switch AN1 acts. At this time, as long as the duration is greater than 32 milliseconds and less than 332 milliseconds, the pin 8 of the chip U2 will output a negative spike, driving the bidirectional thyristor BG to conduct, and the bulb L When the control button 6 is pressed halfway for more than 332 milliseconds, the circuit is in a dimming working state, and the phase angle of the trigger pulse output by pin 8 of the chip U2 changes continuously between 41 degrees and 159 degrees, and according to The sensibility of the human eye is divided into three processes: fast, slow and pause. When half pressing the control button 6 ends, the brightness memory inside the chip U2 memorizes the phase angle at this time. At this time, if a half-press action of more than 32 milliseconds and less than 332 milliseconds is applied, pin 8 of the chip U2 will output a high level, so that the bidirectional thyristor BG will be cut off, the bulb L will be extinguished, and the circuit will be in a closed state. The control logic part inside the chip U2 controls the phase angle and is still memorized by this part to ensure that when the circuit is turned on next time, the phase angle before it is turned off is maintained, and the light source maintains the original brightness. Pin 2 of chip U2 has the function of dimming. When the phase angle of the trigger pulse output by pin 8 of chip U2 is the largest (159°), pin 3 of chip U1 applies 83 pulses to pin 2 of chip U2, and pin 8 of chip U2 The phase angle of the trigger pulse output by the pin changes continuously from 159° to 40°, and finally cuts off (the trigger pulse is not output).

Because the chip U2 in the dimming control circuit 2 has a brightness memory function, when the fade-out is over and the circuit is in the off state, if you want to light the bulb, you must press and hold the micro switch AN1 to make the bulb L gradually brighten from dark. Meet the needs of one-click light. Therefore, a single-pole double-throw micro switch AN2 is added. When it is necessary to light up at the touch of a button, the micro switch AN2 needs to be activated once to power off and discharge the circuit, so that the brightness memory in the chip U2 can be restored to the maximum value. light, and then touch the micro switch AN1 once again to make the light on.

In the control button 6 of the present invention, a connecting rod 64 is arranged eccentrically, so that the active forces distributed by the button 63 on the microswitches AN1 and AN2 are different, so as to achieve two-stage control of the control button 6 . When the button 63 is pressed, the micro switch AN1 is touched first, and then the micro switch AN2 is touched. When the button 63 is released, the microswitch AN2 is released first, and then the microswitch AN1 is released. At the same time, the potentiometer W for adjusting the dimming time is combined with the switch S to form a rotatable two-stage button.

In the utility model, the model of the chip U1 is ICM7555, and the model of the chip U2 is NB7232.

The basic principles and main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (8)

1. A dimming dimming device with adjustable dimming time, characterized in that it comprises: a control button; a pulse generating circuit providing a fade-out pulse signal; A dimming control circuit for controlling the dimming of the dimming circuit; A step-down rectification filter circuit for converting the AC power supply into a DC power supply for use by the pulse generation circuit and the dimming control circuit; A dimming circuit and a light bulb load for dimming a pair of light bulb loads; The AC power supply is connected to the step-down rectification filter circuit, the control circuit and the bulb load, the control circuit and the bulb load are connected to each other, and the output end of the step-down rectification filter circuit is connected to the pulse generation circuit and the regulator through the control button. A light control circuit, the output end of the pulse generating circuit is connected to the light adjustment control circuit, and the output end of the light adjustment control circuit is connected to the light adjustment circuit. 2. The dimming and dimming device according to claim 1, characterized in that: the control button is a rotatable two-stage button, which includes an upper panel and a lower mounting plate, and several Control switch and a rotary adjustable resistor, a through hole is provided on the upper panel corresponding to the position of the rotary adjustable resistor, a button is arranged in the through hole, and the lower end of the button is set on the adjusting rod of the rotary adjustable resistor On, the connecting piece is eccentrically sleeved on the adjusting rod, and the connecting piece is located above the contact end of the control switch. 3. The dimming and dimming device according to claim 2, wherein the control switch is a micro switch. 4. The dimming and dimming device according to claim 2, wherein the connecting member is a connecting rod. 5. The dimming dimming device according to claim 1, characterized in that: the pulse generating circuit is composed of a chip U1, a resistor R1 and a capacitor C2; the resistor R1 is connected in parallel to pins 2 and 7 of the chip U1, and the pin of U1 Pin 2 is connected to pin 6 and capacitor C2, and the other end of capacitor C2 is connected to pin 1 of chip U1 and then connected to the dimming control circuit; pin 4 and pin 8 of chip U1 are connected to each other and then connected to the control circuit. In the button, pin 7 of the chip U1 is also connected to the control button; pin 3 of the chip U1 is connected to the dimming control circuit. 6. The dimming dimming device according to claim 1, characterized in that: the dimming control circuit is composed of chip U2, resistors R2, R4, R5, capacitors C3, C4 and diode D2; pin 2 of chip U2 Connect with pin 3 of the chip U1 in the pulse generating circuit, pin 6 and pin 7 of the chip U2 are connected to each other and then respectively connected to pin 1 of the chip U1 in the pulse generating circuit, the control button and the step-down rectification filter circuit; Pin 1 of U2 is respectively connected to capacitors C3, C4, the cathode of diode D2 and resistor R2, and then connected to control button 6, the other end of capacitor C3 is connected to pin 3 of chip U2, and pin 4 of chip U2 is connected to the other end of capacitor C4 One end, the anode of diode D2 and resistor R4, the other end of resistor R2 is connected to pin 5 of chip U2 and then connected to the control button, the other end of resistor R4 is connected to the step-down rectifier filter circuit; pin 8 of chip U2 passes through resistor R5 Connect to the dimming circuit. 7. The dimming and dimming device according to claim 1, characterized in that: the step-down rectification filter circuit is composed of a resistor R3, a capacitor C1, a voltage regulator tube Z and a diode D1; the capacitor C1 and the voltage regulator tube Z are connected to each other After connecting, connect the anode of the diode D1, the control button and pins 6 and 7 of the chip U2 in the dimming control circuit. The L terminal of the AC power supply; the cathode of the diode D1 is respectively connected to the resistor R4 in the dimming control circuit, one end of the bulb load and the N terminal of the 220V AC power supply through the resistor R3. 8. The dimming dimming device according to claim 1, wherein the dimming circuit is a triac.

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