CN210899774U

CN210899774U - Indoor lamp dimmer

Info

Publication number: CN210899774U
Application number: CN201921556129.5U
Authority: CN
Inventors: 张亮; 伍金华
Original assignee: Shenzhen Xingbiao Electronic Technology Co ltd
Current assignee: Shenzhen Xingbiao Electronic Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-06-30
Anticipated expiration: 2029-09-19

Abstract

An indoor lamp dimmer comprises a lamp dimmer body, a voltage stabilizing circuit, a photoelectric switch, a motor speed reducing mechanism, a microswitch, an infrared detection circuit and a sound control circuit, wherein the infrared detection circuit is connected with the photoelectric switch; the voltage stabilizing circuit, the photoelectric switch, the infrared detection circuit and the sound control circuit are arranged on a dimming circuit board in the dimmer body and are connected through circuit board wiring; the upper end of an adjustable resistance adjusting handle of the dimming circuit board is connected with the lower part of a power output shaft of the motor reducing mechanism, and the motor reducing mechanism is arranged on the dimming circuit board. This is novel need not manual regulation, adjustment handle to realize lamps and lanterns illuminance and adjust, and is more convenient in the in-service use, and has effectively promoted off-the-shelf grade, provides product competitiveness. People in the classroom can move, and the light of the lamp can be kept to emit light all the time; when no person exists indoors any more and people forget to turn off the output power supply of the dimmer body, the sound control circuit and the infrared detection circuit can automatically stop the output power supply, so that the electric energy waste is prevented.

Description

Indoor lamp dimmer

Technical Field

The utility model relates to an electrical control equipment field, especially an indoor lamps and lanterns dimmer that uses.

Background

The dimmer for the lamp can fully meet the control requirements of users on the brightness of different strong and weak lights because the luminous intensity of the lamp can be adjusted, so that the dimmer for the lamp is widely applied. The use method of the dimmer comprises the steps that different resistance values of the adjustable resistor of the dimming circuit board inside the dimmer connected with the adjusting handle are changed through the adjusting handle at the outer side end of the left-right adjusting shell, and then the voltage output to the lamp is changed through the dimming circuit board (two power input ends of the dimming circuit board are connected with two poles of a 220V input power supply, two power output ends of the dimming circuit board are connected with two ends of the power input end of the lamp, and after the adjusting handle of the adjustable resistor is adjusted leftwards, the voltage output to the lamp by the dimming circuit board is reduced, otherwise, the voltage is increased), and the aim of changing different.

The existing light modulator for the lamp has certain inconvenience in actual use due to the fact that a user needs to manually rotate an adjusting handle for adjusting the adjustable resistor of the light modulation circuit board, the grade of a finished product cannot be effectively improved, and better product competitiveness cannot be provided on the premise that the existing industrial products compete more and more. Furthermore, the existing dimmer does not have the function of automatically turning off the power supply, so that when the dimmer is applied to public places (such as classrooms) or families, if a user forgets to turn off the output power supply, the electric energy is wasted.

SUMMERY OF THE UTILITY MODEL

In order to overcome the drawback that current light modulator exists because of the structure limit, the utility model provides a regulation handle who does not need manual regulation light modulator body realizes lamps and lanterns illuminance regulation, before the user only need point to be close two sets of photoelectric switch's detecting head respectively, under relevant circuit and motor reduction gears effect, can realize the illuminance regulation of lamps and lanterns automatically, and when indoor (for example the classroom) nobody activity and production sound, can self-closing lamps and lanterns input power, reach automatic control and energy-conserving indoor lamps and lanterns light modulator from this.

The utility model provides a technical scheme that its technical problem adopted is:

an indoor lamp dimmer comprises a lamp dimmer body, a voltage stabilizing circuit, a photoelectric switch, a motor speed reducing mechanism and a microswitch, and is characterized by also comprising an infrared detection circuit and a sound control circuit; the voltage stabilizing circuit, the photoelectric switch, the infrared detection circuit and the sound control circuit are arranged on a dimming circuit board in the dimmer body and are connected through circuit board wiring; the upper end of an adjustable resistance adjusting handle of the dimming circuit board is connected with the lower part of a power output shaft of a motor reducing mechanism, and the motor reducing mechanism is arranged on the dimming circuit board; the two ends of the power supply output of the voltage stabilizing circuit are respectively connected with the two ends of the power supply input of the two sets of photoelectric switches, the sound control circuit and the infrared detection circuit, the signal output end of the sound control circuit is connected with the signal input end of the infrared detection circuit, one pole of the 220V alternating current power supply is connected with the control power supply input end of the infrared detection circuit, and the other pole of the 220V alternating current power supply, the control power supply output end of the infrared detection circuit and the two ends of the power supply input of the dimming circuit board in the dimmer body are respectively connected; the two ends of the power output of the two sets of photoelectric switches are respectively connected with the positive and negative poles of the motor speed reducing mechanism and the positive and negative poles of the motor speed reducing mechanism, two wiring terminals of one micro power switch are connected between the positive power output end of the first set of photoelectric switch and the positive power input end of the motor speed reducing mechanism in series, and two wiring terminals of the other micro power switch are connected between the negative power output end of the second set of photoelectric switch and the positive power input end of the motor speed reducing mechanism in series.

Further, the two micro switches are normally closed contact type micro switches.

Furthermore, a transverse plate is arranged on one side of the lower portion of an adjustable resistance adjusting handle of a dimming circuit board in the dimmer body, a limiting block is arranged on the left portion of the upper end of a shell of the adjustable resistance, and the rear sides of the shells of the two micro switches are fixedly installed on the front side end and the rear side end of the limiting block respectively.

Furthermore, the voltage stabilizing circuit is an AC-to-DC switching power supply module.

Furthermore, each set of photoelectric switch is provided with a relay, the relays are connected through circuit board wiring, the positive power input end of the photoelectric switch is connected with the positive control power input end of the relay, the positive power output end of the photoelectric switch is connected with the positive power input end of the relay, the negative power input end of the photoelectric switch is connected with the negative power input end of the relay and the negative control power input end of the relay, and the front ends of the detection heads of the two sets of photoelectric switches are respectively positioned at the front sides in the left and right openings of the shell.

Further, the motor reduction mechanism is a motor gear reducer.

Further, the infrared detection circuit comprises a human body infrared sensing module, a diode, a resistor, an NPN triode and a relay, wherein the human body infrared sensing module and the diode, the resistor, the NPN triode and the relay are connected through circuit board wiring, the front end of a Fresnel lens of the human body infrared sensing module is positioned outside the front side of an opening at the lower end of the front middle part of the shell, a pin 1 of an anode power input end of the human body infrared sensing module is connected with a relay anode power input end, a pin 3 of the human body infrared sensing module is connected with an emitting electrode of the NPN triode, a pin 3 of an output end of the human body infrared sensing module is connected with an anode of the diode, a cathode of the diode is connected with one end of the resistor, the other end of the resistor is connected with.

The sound control circuit comprises an electret microphone, an adjustable resistor, a ceramic chip capacitor, an NPN triode, a PNP triode and a diode, wherein the electret microphone, the adjustable resistor, the ceramic chip capacitor, the NPN triode, the PNP triode and the diode are connected through a circuit board in a wiring mode, one end of the adjustable resistor is connected with one end of the resistor and an emitting electrode of the PNP triode, the other end of the adjustable resistor is connected with one end of the electret microphone and one end of the ceramic chip capacitor, the other end of the ceramic chip capacitor is connected with a base electrode of the NPN triode, the other end of the resistor is connected with a collector electrode of the NPN triode and a base electrode.

The utility model has the advantages that: this novel dimmer circuit board adjustment handle who does not need manual regulation dimmer body realizes lamps and lanterns illuminance regulation. In actual adjustment, a user only needs to approach the front 3cm of the detection heads of the two sets of photoelectric switches by fingers respectively, the two sets of photoelectric switches can respectively control the motor speed reducing mechanisms to respectively drive the adjustable resistance adjusting handles of the dimmer main body dimmer circuit board to rotate leftwards or rightwards, so that different resistance values of the adjustable resistance can be adjusted, further, under the self-action of the dimmer main body dimmer circuit board, the voltage input to the lamp is changed to be high or low, and the brightness of the lamp is changed strongly or weakly; therefore, the adjusting handle for adjusting the adjustable resistor is not required to be manually rotated, so that the adjustable resistor is more convenient in actual use, the grade of a finished product is effectively improved, and the product competitiveness is provided. This is novel under sound control circuit, infrared detection circuit combined action, as long as there is someone activity such as indoor (for example classroom), the user does not have the output power who closes the light modulator body, can effectively keep lamps and lanterns luminous always, in-service use, no longer someone when indoor, when personnel forget the output power who closes the light modulator body, sound control circuit, infrared detection circuit can the automatic shutdown output power, it is extravagant to have prevented that the user from forgetting the electric energy that causes when closing its output power. Based on the above, so the utility model discloses good application prospect has.

Drawings

The invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the dimmer body, the micro-motor reducing mechanism and the micro-switch for the lamp of the present invention.

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

Detailed Description

As shown in fig. 1 and 2, an indoor lamp dimmer comprises a lamp dimmer body 1, a voltage stabilizing circuit 2, a photoelectric switch 3, a micro motor speed reducing mechanism 4,

micro switches

51 and 52, an infrared detection circuit 6 and a sound control circuit 7; the voltage stabilizing circuit 2, the photoelectric switch 3, the infrared detection circuit 6 and the sound control circuit 7 are arranged on a dimming circuit board 102 in the dimmer body and are connected through circuit board wiring; the upper end of an adjustable resistance adjusting handle 101 of a dimming circuit board in the dimmer body 1 is rectangular, a sleeve 42 with a rectangular inner lower part is welded below a power output shaft 41 of the motor speed reducing mechanism, the sleeve 42 is sleeved outside the upper end of the adjustable resistance 101 handle, a plurality of supporting metal rods 43 are welded at the side end of the lower part of a shell of the motor speed reducing mechanism 4, and the lower ends of the plurality of metal rods 43 are respectively welded on the dimming circuit board 102 and are positioned around the adjustable resistance 101; the two sides of the front end of the shell 104 of the dimmer body and the upper and lower ends of the middle part are respectively provided with an opening. There is an integrated into one piece's horizontal rectangular plate 105 in the adjustable resistance adjustment handle 101 one side of the interior dimming circuit board of dimmer body 1, there is a spacing rectangular block 106 of integrated into one piece epirelief at the casing upper end left part of adjustable resistance 103, the casing rear side of two

micro-gap switches

51 and 52 is glued in stopper 106 front and back both sides end respectively, when adjustable resistance's adjustment handle 101 moves to the dead point left, horizontal rectangular plate 105 front end and stopper rear side first micro-gap switch 51 button front end contact, two inside normally closed contacts of first micro-gap switch 51 open a way, when adjustable resistance 103's adjustment handle 101 moves to the dead point right, horizontal rectangular plate 105 rear end and stopper front side second micro-gap switch 52 button front end contact, two inside normally closed contacts of second micro-gap switch 52 open a way. The micro motor speed reducing mechanism 4 is a finished 6V micro motor gear speed reducer product of model N20, a plurality of mutually meshed speed reducing gears are arranged in the lower end of a shell, when the micro motor speed reducing mechanism works, power output by a rotating shaft of a motor is reduced by the multi-stage speed reducing gears to increase output torque, then the power is output from a power output shaft 41 at the lower end, the rotating speed of the power output shaft 41 per minute is 20 revolutions, and the inner side of a sleeve 42 below the power output shaft 41 and the periphery of a rectangular part at the upper end of an adjusting handle 101 of an.

As shown in fig. 1, 2, and 3, the two microswitches S1, S2 are normally closed contact microswitches. The light modulator body TG for the lamp is a finished product of the light modulator for the lamp in the honor, the peaceful and the macro industry of brand, the power is 2KW, the light modulator is installed in a plastic shell 104, a plurality of installation holes are formed in the periphery of the inner rear side end of the plastic shell 104, the light modulator is conveniently installed on an indoor wall surface by screws and the like, and after an adjusting handle 101 of an adjustable resistor 103 rotates leftwards to a stop point, a power output end stops outputting power to the lamp. The voltage stabilizing circuit U1 is a switching power supply module product of model S-60-6, model ELECALLALL YILAOCK, converting 220V AC into 6V DC, and has power of 50W. Each set of photoelectric switch is provided with a relay, the photoelectric switch is a finished product of a photoelectric switch with a brand cloud glow and a model number of E18-D80NK, the photoelectric switch is provided with three pins, the pins 1 and 2 are power supply input ends, the pin 3 is a power supply output end, when an obstacle blocks infrared light emitted by a detection head at the front end of the detection head in front of the photoelectric switch in use, the pin 3 of the photoelectric switch can output a high level, the detection distance is 3-80cm, an adjusting knob is arranged at the rear side end of a shell, the detection distance of the detection head is shortened when the shell is adjusted leftwards, and the detection distance of the detection head is lengthened when the shell is adjusted rightwards (the detection distances of the detection heads of the photoelectric switches U3 and U4 are 3 cm; a pin 1 of a positive power supply input end of a first set of photoelectric switch U3 is connected with a positive control power supply input end of a relay K1, a pin 3 of a positive power supply output end of a photoelectric switch U3 is connected with a positive power supply input end of a relay K1, and a pin 2 of a negative power supply input end of the photoelectric switch U3 is connected with a negative power supply input end of a relay K1 and a negative control power supply input end; the positive power input end 1 pin of a second set of photoelectric switch U4 is connected with the positive control power input end of the relay K2, the positive power output end 3 pin of the photoelectric switch U2 is connected with the positive power input end of the relay K2, the negative power input end 2 pin of the photoelectric switch U2 is connected with the negative power input end of the relay K2 and the negative control power input end, and the front ends of the detection heads of the two sets of photoelectric switches U3 and U4 are respectively positioned on the front sides in two openings on the left and right sides of the front of the shell 104. The infrared detection circuit comprises a finished human body infrared induction module U2 with a brand JXINW/Jiaxin micro model and a model SR501, a diode VD1, a resistor R1, an NPN triode Q3 and a relay K which are connected through circuit board wiring, the human body infrared induction module U2 is provided with three pins and two adjusting knobs, a Fresnel lens 8 is arranged at the front side end of the detection head, the detection distance of the pyroelectric infrared detection head at the inner side behind the Fresnel lens 8 can be increased, the farthest detection distance is about 7 meters, the detection angle of the human body infrared induction module U2 is about 120 degrees of the front fan shape of the Fresnel lens, the first pin 1 and the third pin 3 are respectively connected with a 6V positive and negative pole power supply, when in work, when people move in front of the Fresnel lens 8, the third pin 2 can output high level, the first adjusting knob can adjust the detection distance of the pyroelectric infrared detection head, and adjust the detection distance to the left to be changed, The detection distance is adjusted to be smaller rightwards, the detection sensitivity of the pyroelectric infrared detection head can be adjusted by the second adjusting knob, the detection sensitivity is adjusted to be larger leftwards, and the detection sensitivity is adjusted to be smaller rightwards, the front end of the Fresnel lens 8 is located outside the front side of an opening at the lower end of the front middle part of the shell 104, the pin 1 of the positive power input end of the human body infrared sensing module U2 is connected with the positive power input end of the relay K, the pin 3 of the human body infrared sensing module U2 is connected with the emitting electrode of the NPN triode Q3, the pin 3 of the output end of the human body infrared sensing module U2 is connected with the positive electrode of the diode VD1, the negative electrode of the diode VD1 is connected with one end of the resistor R1, the other end of the resistor R1 is. The sound control circuit comprises an electret microphone MB, an adjustable resistor RP, a resistor R, a triode Q1 of a ceramic chip capacitor C, NPN, a PNP triode Q2 and a diode VD2, wherein the two ends are connected through a circuit board in a wiring way, one end of the adjustable resistor RP is connected with one end of the resistor R and an emitting electrode of the PNP triode Q2, the other end of the adjustable resistor RP is connected with one end of the electret microphone BM and one end of the ceramic chip capacitor C, the other end of the ceramic chip capacitor C is connected with a base electrode of the NPN triode Q1, the other end of the resistor R is connected with a collector electrode of the NPN triode Q1 and a base electrode of the PNP triode Q2, a collector electrode of the PNP triode Q2 is connected with the positive electrode of a silicon rectifier diode VD2, the other.

As shown in FIG. 3, two pins 1 and 2 at the power input ends of a 220V AC power supply and a voltage regulator circuit U1 are respectively connected through leads, two

pins

3 and 4 at the power output end of a voltage regulator circuit U1 are respectively connected with two pins 1 and 2 at the power input ends of two sets of photoelectric switches U3 and U4, one end of an adjustable resistor RP at the power input ends of a sound control circuit and an emitter of an NPN triode Q1, the input end of a relay K anode power supply at the power input ends of an infrared detection circuit and an emitter of an NPN triode Q3, the cathode of a diode VD2 at the signal output end of the sound control circuit is connected with one end of a resistor R1 at the signal input end of the infrared detection circuit, one pole of the 220V AC power supply is connected with the input end of the relay K control power supply of the infrared detection circuit, the other pole of the 220V AC power supply, the relay K contact end at the control power,

pins

3 and 4 at two ends of the power supply output of the dimming circuit board TG are respectively connected with two ends of the power supply input of the lamp H; two normally open contact ends of power output end relays K1 and K2 of two sets of photoelectric switches are respectively connected with positive and negative poles and negative and positive pole power input ends of a motor speed reducing mechanism M, wherein two wiring ends of one micro-power switch S1 are connected in series between one normally open contact end of a positive power output end relay K1 of the first set of photoelectric switches and the positive power input end of the motor speed reducing mechanism M, and two wiring ends of the other micro-power switch are connected in series between one normally open contact end of a negative power output end relay K2 of the second set of photoelectric switches and the positive power input end of the motor speed reducing mechanism M.

As shown in fig. 1, 2, and 3, after the 220V ac power supply enters pins 1 and 2 of the voltage regulator circuit U1, the voltage regulator circuit U1 outputs a stable 6V dc power supply through its

pins

3 and 4 under the action of its internal circuit, and the power supply enters two sets of photoelectric switches U3 and U4 and the power supply input ends of the infrared detection circuit and the sound control circuit, so that the two sets of photoelectric switches U3 and U4 and the infrared detection circuit and the sound control circuit are in a powered working state. In the infrared detection circuit: when people are in a room (such as a classroom) at ordinary times, the area of the classroom is not large, and more students in the classroom cannot exceed 7 meters from the front of a Fresnel lens of a finished product U2 of the human body infrared sensing module, so that infrared light emitted by an indoor human body can be detected by a pyroelectric infrared detection head of the finished product U2 of the human body infrared sensing module all the time, and then a high level is output all the time by a pin 2 of the finished product U2 of the human body infrared sensing module and enters one end of a resistor R1 through a diode VD1 in a one-way conduction mode, the high level enters a base electrode of an NPN triode Q3 (higher than 0.7V) after being subjected to voltage reduction and current limitation by a resistor R1, and the NPN triode Q3 is; because the positive power input end of the relay K is communicated with the pin 3 of the voltage stabilizing circuit U1, one pole of the 220V alternating current power supply is connected with the control power input end of the relay K, the other pole of the 220V alternating current power supply, the normally open contact end of the relay K and the input ends 1 and 2 of the power input ends of the light adjusting circuit board TG in the light adjuster body are respectively connected, and the

pins

3 and 4 of the power output ends of the light adjusting circuit board TG are connected with the input ends of the power of the lamp H, the relay K can be electrified to close the control power input end and the normally open contact end of the relay K, and further, the input ends 1 and 2 of the power input ends of the light adjusting circuit board TG in the light adjuster body are electrified, and the lamp; when nobody is in the room, because the infrared light that the human body sent has not been had before the fresnel lens of human infrared induction module finished product U2, then, 2 feet of human infrared induction module finished product U2 can stop the output high level, and then relay K loses the electricity and no longer actuation, dimming circuit board TG power input both ends 1 and 2 feet lose the electricity, dimming circuit board TG's power output both ends 3 and 4 feet no longer output power, lamps and lanterns H also can lose the electricity and no longer get the electricity and give out light, automatic control's destination has been reached, when having prevented indoor (for example) classroom nobody, the electric energy waste that the user caused when forgetting to close dimming circuit board TG's output power. In the sound control circuit: when someone is in a room (such as a classroom), when a teacher or a student speaks in a lesson and plays learning videos, the electret microphone BM receives the sound, the electret microphone BM converts the sound signal into an audio signal, the audio signal is coupled to the base electrode (higher than 0.7V) of the NPN triode Q1 through the ceramic chip capacitor C5, the NPN triode Q1 is conducted, the collector electrode of the NPN triode Q1 outputs a low level to enter the PNP triode Q2, the PNP triode Q2 is conducted, the collector electrode of the PNP triode Q2 outputs a high level to enter one end of the resistor R1 of the infrared detection circuit through the diode VD2 in a one-way conduction mode, then the NPN triode Q1 is conducted, the relay K is electrified to attract the control power input end and the normally open contact end of the relay K to be closed, further, the dimming circuit board TG power input two ends 1 and 2 in the dimmer body; when no person is indoors, because no sound signal enters the electret microphone BM, the NPN triode Q1 and the PNP triode Q2 are both cut off, then, the NPN triode Q1 of the infrared detection circuit is also cut off, the relay K is not pulled in when power is lost, and then the lamp H does not emit light any more, thereby preventing the electric energy waste caused when a user forgets to turn off the output power supply of the dimming circuit board TG when no person is indoors. The novel lamp H is controlled to be powered on or powered off by the sound control circuit and the infrared detection circuit simultaneously, so that the control reliability is further ensured (the infrared detection circuit can be prevented from controlling the lamp H to be switched on or off in case of damage and no timely maintenance before maintenance); in practical cases, even if the output power of the dimming circuit board TG is turned off when all the persons in the room (for example, a classroom) leave the classroom, the lighting fixture H is powered on and emits light temporarily due to the sound generated by the external lightning strike, the lightning sound cannot be kept continuously, and therefore the lighting fixture H is turned off automatically after no lightning exists.

As shown in fig. 1, 2, and 3, when two sets of the photoelectric switches U3 and U4 are powered on to operate, and if a user needs to adjust the light intensity of the lamp H to be low, the finger of the hand is close to the front end of the probe of the first set of the photoelectric switch U3 within 3cm, and under the action of the internal circuit of the photoelectric switch U3, the pin 3 of the photoelectric switch U3 outputs a high level to enter the positive power input end of the relay K1; because the negative power supply input end and the negative control power supply input end of the relay K1 are connected with the 4 pins of the voltage stabilizing circuit U1, and the positive control power supply input end of the relay K1 is connected with the 3 pins of the voltage stabilizing circuit U1, the relay K1 can be electrified to attract the two control power supply input ends and the two normally open contact ends of the relay K1 to be respectively closed; because two normally open contact ends of the relay K1 are respectively connected with positive and negative pole power input ends of the motor reducing mechanism M through leads, a motor of the motor reducing mechanism M can work as a rotating shaft thereof to rotate clockwise at the moment, and then under the action of a multi-stage reducing gear in a shell of the motor reducing mechanism M, a power output shaft thereof drives an adjustable resistance adjusting handle 101 of a dimmer body dimmer circuit board TG to rotate leftwards, so that under the action of an internal circuit of the dimmer circuit board TG, the voltage output from two

power output ends

3 and 4 to a lamp H is reduced, and the luminous intensity of the lamp H is lowered; when the luminous intensity of the lamp H reaches the requirement, a user takes a finger away from a detection head of the photoelectric switch U3 by a distance larger than 3cm, the 3 pin of the photoelectric switch U3 does not output high level any more, the relay K1 loses power and does not attract, then the power output shaft of the motor reducing mechanism M loses power and does not drive the adjustable resistance adjusting handle 101 of the dimmer main body dimmer circuit board TG to rotate to the left, and therefore the aim of adjusting the luminous intensity of the lamp H to be lowered is achieved. When the adjustable resistance adjusting handle 101 of the dimming circuit board TG in the dimmer body rotates to the left to the stop point, the

pins

3 and 4 of the power output end of the dimming circuit board TG stop outputting power to the lamp H, so as to achieve the purpose of turning off the input power of the lamp H. When the two sets of photoelectric switches U3 and U4 are powered on to work, if a user needs to adjust the luminous intensity of the lamp H to be high, the handle finger is close to the front 3cm of the probe of the second set of photoelectric switch U4, and under the action of an internal circuit of the photoelectric switch U4, the 3 pin of the photoelectric switch U4 outputs a high level to enter the positive power supply input end of the relay K2; because the negative power supply input end and the negative control power supply input end of the relay K2 are connected with the 4 pins of the voltage stabilizing circuit U1, and the positive control power supply input end of the relay K2 is connected with the 4 pins of the voltage stabilizing circuit U1, the relay K2 can be electrified to attract the two control power supply input ends and the two normally open contact ends of the relay K2 to be respectively closed; because two normally open contact ends of the relay K2 are respectively connected with the negative and positive pole power input ends of the motor reducing mechanism M through leads, the motor of the motor reducing mechanism M can work as an electric motor to rotate the rotating shaft thereof anticlockwise, and then under the action of a multi-stage reducing gear in the shell of the motor reducing mechanism M, the power output shaft thereof drives the adjustable resistance adjusting handle 101 of the dimming circuit board TG in the dimmer body to rotate rightwards, so that the voltage output from the two power output ends 3 and 4 to the lamp H under the action of the internal circuit of the dimming circuit board TG is increased, and the luminous intensity of the lamp H is increased; when the luminous intensity of the lamp H reaches the requirement, a user takes a finger away from a detection head of the photoelectric switch U4 by a distance larger than 3cm, the 3 pin of the photoelectric switch U4 does not output high level any more, the relay K2 loses power and does not attract, the motor speed reducing mechanism M loses power, and the power output shaft of the motor speed reducing mechanism M does not drive the adjustable resistance adjusting handle 101 of the dimming circuit board TG in the dimmer body to rotate rightwards, so that the aim of adjusting the luminous intensity of the lamp H to be larger is fulfilled. In this novel regulation, when adjustable resistance ' S adjustment handle 101 moved the dead point left, the first micro-gap switch S1 button front end contact of horizontal rectangular plate 105 front end and stopper rear side, two inside normally closed contacts of first micro-gap switch S1 are opened a way, because, two wiring terminals of micro-gap power switch S1 establish ties between one of them normally open contact end of first set of photoelectric switch ' S positive power output end relay K1 and motor reduction mechanism M ' S positive power input end, so motor reduction mechanism M can lose the electricity and no longer work at this moment, prevent to drive adjustment handle 101 and to rotate to the left too much and lead to adjustable resistance 103 to damage. When the adjusting handle 101 of the adjustable resistor moves to the dead point rightwards, the rear end of the transverse rectangular plate 105 contacts with the front end of the button of the second microswitch S2 on the rear side of the limiting block, two normally closed contacts inside the second microswitch S2 are opened, and because two terminals of the microswitch S2 are connected in series between one normally open contact end of the positive power output end relay K2 of the second set of photoelectric switches and the negative power input end of the motor speed reducing mechanism M, the motor speed reducing mechanism M can lose power and does not work any more at the moment, and the adjustable resistor 103 is prevented from being damaged due to the fact that the adjusting handle is driven to rotate rightwards too much. In this is novel, motor reduction gears M rotational speed is low, can the rapid stop after losing the electricity and rotate. This novel adjustment handle who does not need manual regulation light modulator body realizes lamps and lanterns illuminance regulation, and is more convenient in the in-service use, and has effectively promoted off-the-shelf grade, has improved product competitiveness, and no longer someone when indoor, when personnel forget the output power supply who closes the light modulator body, sound control circuit, infrared detection circuit can make its automatic stop output power supply, and it is extravagant to have prevented that the user from forgetting the electric energy that causes when closing output power supply. In fig. 3, the diodes VD1, VD2 are model numbers 1N 4007; the specification of the adjustable resistor RP is 10K; the specification of the ceramic chip capacitor C is 1 muF; the models of NPN triodes Q1 and Q3 are 9013; the model of the PNP triode Q2 is 9012; the resistance R1 is 10K; the resistance value of the resistor R is 10K; the electret microphone MB brand is loose; relay K is a DC4123 type 6V relay; relays K1, K2 are brand Songle 6V relays having two power input terminals, two control power input terminals, two normally open contact terminals, two normally closed contact terminals.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An indoor lamp dimmer comprises a lamp dimmer body, a voltage stabilizing circuit, a photoelectric switch, a motor speed reducing mechanism and a microswitch, and is characterized by also comprising an infrared detection circuit and a sound control circuit; the voltage stabilizing circuit, the photoelectric switch, the infrared detection circuit and the sound control circuit are arranged on a dimming circuit board in the dimmer body and are connected through circuit board wiring; the upper end of an adjustable resistance adjusting handle of the dimming circuit board is connected with the lower part of a power output shaft of a motor reducing mechanism, and the motor reducing mechanism is arranged on the dimming circuit board; the two ends of the power supply output of the voltage stabilizing circuit are respectively connected with the two ends of the power supply input of the two sets of photoelectric switches, the sound control circuit and the infrared detection circuit, the signal output end of the sound control circuit is connected with the signal input end of the infrared detection circuit, one pole of the 220V alternating current power supply is connected with the control power supply input end of the infrared detection circuit, and the other pole of the 220V alternating current power supply, the control power supply output end of the infrared detection circuit and the two ends of the power supply input of the dimming circuit board in the dimmer body are respectively connected; the two ends of the power output of the two sets of photoelectric switches are respectively connected with the positive and negative poles of the motor speed reducing mechanism and the positive and negative poles of the motor speed reducing mechanism, two wiring terminals of one micro power switch are connected between the positive power output end of the first set of photoelectric switch and the positive power input end of the motor speed reducing mechanism in series, and two wiring terminals of the other micro power switch are connected between the negative power output end of the second set of photoelectric switch and the positive power input end of the motor speed reducing mechanism in series.

2. A dimmer for an indoor lighting fixture as recited in claim 1, wherein said two microswitches are normally closed contact microswitches.

3. A dimmer for indoor lamps as claimed in claim 1, wherein a horizontal plate is provided at one side of a lower portion of an adjustable resistance adjusting handle of the dimming circuit board in the dimmer body, a stopper is provided at a left portion of an upper end of a housing of the adjustable resistance, and rear sides of the housings of the two micro switches are fixedly installed at front and rear side ends of the stopper, respectively.

4. A dimmer for an indoor lighting fixture as claimed in claim 1, wherein the voltage regulator circuit is an ac-to-dc switching power supply module.

5. A dimmer for an indoor lighting fixture as claimed in claim 1, wherein each of the photoelectric switches is provided with a relay connected via wiring on the circuit board, a positive power input terminal of the photoelectric switch is connected to a positive control power input terminal of the relay, a positive power output terminal of the photoelectric switch is connected to a positive power input terminal of the relay, a negative power input terminal of the photoelectric switch is connected to a negative power input terminal and a negative control power input terminal of the relay, and front ends of probes of the two sets of photoelectric switches are respectively located at front sides of two openings in the front left and right portions of the housing.

6. A dimmer for an indoor lighting fixture as recited in claim 1, wherein the motor reduction mechanism is a motor gear reduction.

7. The dimmer for indoor lighting fixture as claimed in claim 1, wherein the infrared detection circuit comprises a human body infrared sensing module, a diode, a resistor, an NPN triode, and a relay, the Fresnel lens front end of the human body infrared sensing module is positioned outside the front side of an opening at the lower end of the front middle part of the shell, the 1 pin of the positive power input end of the human body infrared sensing module is connected with the positive power input end of the relay, the 3 pins of the human body infrared sensing module are connected with the emitting electrode of the NPN triode, the 3 pins of the output end of the human body infrared sensing module are connected with the positive electrode of the diode, the negative electrode of the diode is connected with one end of the resistor, the other end of the resistor is connected with the base electrode of the NPN triode, the collecting electrode of the NPN triode is connected with the power input end of the negative electrode of the.

8. A dimmer for an indoor lighting fixture as defined in claim 1, wherein the sound control circuit comprises an electret microphone, an adjustable resistor, a ceramic capacitor, an NPN transistor, a PNP transistor, and a diode, which are connected to each other through wiring of the circuit board, one end of the adjustable resistor is connected to one end of the resistor and to an emitter of the PNP transistor, the other end of the adjustable resistor is connected to one end of the electret microphone and one end of the ceramic capacitor, the other end of the ceramic capacitor is connected to a base of the NPN transistor, the other end of the resistor is connected to a collector of the NPN transistor and a base of the PNP transistor, a collector of the PNP transistor is connected to an anode of the diode, the other end of the electret microphone is connected to an emitter of the NPN transistor.