CN218162949U - AC touch light-adjusting desk lamp - Google Patents

Abstract

The utility model discloses an exchange touch desk lamp of adjusting luminance, dimming circuit includes: the system comprises a rectification filter circuit, a voltage stabilizing circuit, a control circuit, a sampling circuit and a silicon controlled rectifier element, wherein external commercial power enters the rectification filter circuit through a power input end to be rectified and filtered, then alternating current is converted into direct current, and the direct current is supplied to the control circuit after being stabilized by the voltage stabilizing circuit; the control circuit comprises a touch dimming chip and a touch terminal connected to the touch dimming chip, the touch dimming chip samples through the sampling circuit, and outputs a corresponding level to the silicon controlled element after receiving a signal output by the touch terminal, so that the silicon controlled element is triggered to be switched on and off. The utility model discloses a touch chip output high level or low level to silicon controlled rectifier element of adjusting luminance realizes the stepless adjusting luminance of alternating current desk lamp to and open, close the function.

Description

AC touch light-adjusting desk lamp

The technical field is as follows:

the utility model relates to a product technical field charges refers in particular to an exchange touch desk lamp of adjusting luminance.

Background art:

the touch dimming switch of alternating current used in the table lamp in the current market is sectional (such as four-section dimming) and can not perform stepless dimming. This results in the user not being able to adjust the brightness precisely to the desired brightness.

At present, many dimming circuits adopt PWM dimming control, and the dimming circuits are mostly applied to a direct-current constant-voltage power supply, and are used for obtaining square wave output currents with different duty ratios by controlling the working time in a unit period, and the duty ratio of the square wave output currents is adjusted, namely the average value of the output currents is adjusted, so that the brightness of a lamp is changed. PWM dimming circuits are generally used in dc lighting fixtures, such as small desk lamps and small night lights, and generally cannot be directly used in ac lighting fixtures. In addition, since the light source has lower luminous efficiency at the PWM square wave current than at the dc current, the PWM dimming method has a poor energy saving effect compared to the analog dimming.

In addition, the traditional silicon controlled rectifier dimmer has certain advantages in dimming, can be used for alternating current lamps, can better control current and can achieve the aim of stepless dimming.

In view of the fact that products such as dimming lamps (lamp caps) and the like developed by the applicant before all adopt multi-stage dimming, the products cannot meet the requirements of consumers, and the inventor redesigns a circuit and proposes the following technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an exchange touch dimming desk lamp is just provided to the realization is to the stepless of desk lamp adjusting luminance.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an exchange touch dimming desk lamp, includes lamp stand and the dimmer circuit of setting in the lamp stand, and this dimmer circuit's power input passes through wire and outside mains connection, and dimmer circuit's output is connected to the desk lamp light source, dimmer circuit include: the device comprises a rectification filter circuit, a voltage stabilizing circuit, a control circuit, a sampling circuit and a thyristor, wherein external commercial power enters the rectification filter circuit through a power supply input end to be rectified and filtered, then alternating current is converted into direct current, and the direct current is supplied to the control circuit after being stabilized by the voltage stabilizing circuit; the control circuit comprises a touch dimming chip and a touch terminal connected to the touch dimming chip, the touch dimming chip samples through the sampling circuit and outputs a corresponding level to the silicon controlled element after receiving a signal output by the touch terminal, and the silicon controlled element is triggered to be switched on and off.

Further, in the above technical solution, a fuse is disposed between the power input terminal and the rectifying and filtering circuit.

Further, in the above technical solution, a voltage reduction resistor R1 is disposed between the fuse and the rectifying and filtering circuit.

Further, in the above technical solution, a filter capacitor is disposed between the voltage stabilizing circuit and the control circuit.

Further, in the above technical solution, the thyristor is connected in series with an inductor.

Further, in the above technical solution, the sampling circuit includes: the power supply comprises a resistor R2, a resistor R3, a triode Q1 and a base-emitter resistor R4 arranged on the triode Q1, wherein the resistor R2, the resistor R3 and the triode Q1 are connected with a power supply input end.

The utility model adopts the above technical scheme after, adopt it to adjust luminance chip output high level or low level to silicon controlled rectifier element through the touch, trigger the phase angle change of silicon controlled rectifier to the electric current that makes output to the desk lamp light source changes, makes the voltage at power both ends change thereupon, thereby reaches stepless purpose of adjusting luminance, and opens, close the function.

Description of the drawings:

fig. 1 is a perspective view of the desk lamp of the present invention;

fig. 2 is a perspective view of the desk lamp of the present invention from another viewing angle;

fig. 3 is a circuit diagram of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

See fig. 1 and fig. 2, the utility model relates to an exchange touch dimming desk lamp, this desk lamp 1 includes lamp stand 10, sets up dimming circuit 2 in lamp stand 10 to and be used for wire 3 with mains connection. The power input end of the dimming circuit 2 is connected with an external mains supply through a wire 3, and the output end of the dimming circuit 2 is connected to the desk lamp light source.

The utility model discloses integrate whole dimmer circuit 2 in a circuit box 20, during the installation, pass through the fix with screw inside lamp stand 10 with circuit box 20, then pass through the wire with touch terminal 230 among the dimmer circuit 2 and set up suitable position in lamp stand 10, can accomplish the equipment, whole assembling process is simple.

As shown in fig. 3, the dimming circuit 2 includes: a rectifying and filtering circuit 21, a voltage stabilizing circuit 22, a control circuit 23, a sampling circuit 24 and a silicon controlled element 25. A fuse 26 is disposed between the power input terminal and the rectifying and filtering circuit 21. A voltage reduction resistor R1 is arranged between the fuse 26 and the rectifying and filtering circuit 21. A filter capacitor 27 is arranged between the voltage stabilizing circuit 22 and the control circuit 23. The thyristor 25 is connected in series with an inductor 28 for absorbing the pulse voltage and preventing breakdown of the thyristor 25.

The control circuit 23 includes a touch dimming chip 231 and a touch terminal 230 connected to the touch dimming chip 231. In this embodiment, the touch dimming chip 231 has the following types: products of HTS1582 XD. The touch dimming chip 231 is sampled by the sampling circuit 24. The sampling circuit 24 comprises: the power supply comprises a resistor R2, a resistor R3, a triode Q1 and a base-emitter resistor R4 arranged on the triode Q1, wherein the resistor R2, the resistor R3 and the triode Q1 are connected with a power supply input end.

The following describes the dimming circuit 2 in detail with reference to the working principle of the present invention.

When the utility model discloses a wire 3 and mains connection back, the electric current passes through power input end in proper order through fuse 26 and step-down resistance R1, and the electric current is imported to rectifier filter circuit 21 after step-down resistance R1 steps down. The rectifying and filtering circuit 21 performs rectification and filtering through the diodes D1 and D4, the zener diode ZD1, and the capacitors C1 and C2, and outputs the rectified and filtered signals to the voltage stabilizing circuit 22.

The voltage stabilizing circuit 22 adopts a voltage stabilizing chip U1, and the voltage stabilizing chip U1 in this embodiment adopts the model as follows: and the linear voltage stabilization chip of the HE 7550S. After being stabilized by the voltage stabilizing circuit 22, the voltage is filtered by the capacitors C6 and C7, and the stable direct current is output to the control circuit 23.

At this time, when the user touches the area of the touch terminal 230, the signal generated by the touch terminal 230 passes through the capacitors CY1 and C5 and the resistor R5, and is input to the touch dimming chip 231. The touch dimming chip 231 is sampled by the sampling circuit 24 and is subjected to processing of the response time of the touch signal output from the touch terminal 230. For example, if the user touches the light modulator chip 231 for a short time (within 0.5 seconds), the touch light modulator chip 231 outputs a high level to the thyristor 25, and the thyristor 25 is triggered to conduct, so as to implement the on/off function of the desk lamp. If the user touches the light-adjusting chip 231 for a long time (more than 2 seconds), the touch light-adjusting chip outputs a high level to the thyristor 25, and the thyristor 25 is triggered to change the phase angle, so that the stepless light adjustment of the light source of the desk lamp is realized.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims (6)

1. The utility model provides an exchange touch dimming desk lamp, includes lamp stand (10) and dimming circuit (2) of setting in lamp stand (10), and the power input of this dimming circuit (2) passes through wire (3) and is connected with outside commercial power, and the output of dimming circuit (2) is connected to desk lamp light source, its characterized in that:

the dimming circuit (2) comprises: the device comprises a rectification filter circuit (21), a voltage stabilizing circuit (22), a control circuit (23), a sampling circuit (24) and a silicon controlled element (25), wherein external commercial power enters the rectification filter circuit (21) through a power input end to be rectified and filtered, then alternating current is converted into direct current, and the direct current is supplied to the control circuit (23) after being stabilized by the voltage stabilizing circuit (22);

the control circuit (23) comprises a touch dimming chip (231) and a touch terminal (230) connected to the touch dimming chip (231), the touch dimming chip (231) samples through the sampling circuit (24), and outputs a corresponding level to the silicon controlled element (25) after receiving a signal output by the touch terminal (230), so that the silicon controlled element (25) is triggered to be switched on and off.

2. An ac touch dimming desk lamp as claimed in claim 1, wherein: a fuse (26) is arranged between the power input end and the rectifying and filtering circuit (21).

3. An ac touch dimming desk lamp according to claim 2, wherein: and a voltage reduction resistor R1 is arranged between the fuse (26) and the rectifying and filtering circuit (21).

4. An ac touch dimming desk lamp as claimed in claim 1, wherein: and a filter capacitor (27) is arranged between the voltage stabilizing circuit (22) and the control circuit (23).

5. An ac touch dimming table lamp according to claim 1, wherein: the silicon controlled element (25) is connected with an inductor (28) in series.

6. An ac touch dimming desk lamp according to any one of claims 1 to 5, wherein: the sampling circuit (24) comprises: the power supply comprises a resistor R2, a resistor R3, a triode Q1 and a base-emitter resistor R4 arranged on the triode Q1, wherein the resistor R2, the resistor R3 and the triode Q1 are connected with a power supply input end.

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