CN202310196U - LED illuminating lamp for sewing machine - Google Patents

LED illuminating lamp for sewing machine Download PDF

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Publication number
CN202310196U
CN202310196U CN2011203802275U CN201120380227U CN202310196U CN 202310196 U CN202310196 U CN 202310196U CN 2011203802275 U CN2011203802275 U CN 2011203802275U CN 201120380227 U CN201120380227 U CN 201120380227U CN 202310196 U CN202310196 U CN 202310196U
Authority
CN
China
Prior art keywords
diode
resistance
triode
sewing machine
illuminating lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011203802275U
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Chinese (zh)
Inventor
曹中祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JINGMEN DONGGUANG NEW ENERGY TECHNOLOGY CO LTD
Original Assignee
JINGMEN DONGGUANG NEW ENERGY TECHNOLOGY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JINGMEN DONGGUANG NEW ENERGY TECHNOLOGY CO LTD filed Critical JINGMEN DONGGUANG NEW ENERGY TECHNOLOGY CO LTD
Priority to CN2011203802275U priority Critical patent/CN202310196U/en
Application granted granted Critical
Publication of CN202310196U publication Critical patent/CN202310196U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

An LED illuminating lamp for a sewing machine comprises an LED set and a light modulation drive circuit. The light modulation drive circuit is composed of an A capacitor (C1), a B capacitor (C2), an A diode (D1), a B diode (D2), a C diode (D3), a D diode (D4), a transformer (T1), a triode (Q1), an A resistor (R1), a B resistor (R2), a C resistor (R3) and a potentiometer (W1). The LED illuminating lamp for a sewing machine has the advantages of simple circuit, small size, low cost, convenient usage, safety and reliability.

Description

A kind of use in sewing machine LED illuminating lamp
Technical field
The utility model relates to a kind of use in sewing machine LED illuminating lamp.
Background technology
The LED lamp body is long-pending little, low in energy consumption, and brightness is high, is the light source that present sewing machine illumination is generally adopted.The driving power of sewing machine lamp is then varied, has directly with resistance-capacitance depressurization, has and adopts the step-down of silicon steel sheet transformer, also has and adopts Switching Power Supply to drive.Directly with resistance-capacitance depressurization, circuit structure is simple, and cost is low, and the life-span is long, but because do not adopt insulating power supply, if run into damaged electric wire in the operation, just has the danger of electric shock, bring potential safety hazard.Adopt silicon steel transformer step-down or with the isolating switch power driving, can solve this hidden danger, but the silicon steel volume of transformer is big, cost is high, heaviness is inconvenient, switching power circuit is complicated, and cost is high, and reliability is relatively poor.Be to adapt to the demand of factory to the LED illuminating lamp, we develop the LED illuminating lamp of a kind of simple in structure, advantages of small volume, cheap, safe and reliable, continuously light-adjustable.
The utility model content
The purpose of the utility model is exactly to the existing above-mentioned deficiency of sewing machine lamp, and a kind of use in sewing machine LED illuminating lamp is provided.
The utility model comprises LED group and light modulation drive circuit, and the light modulation drive circuit is by A capacitor, B capacitor, and A diode, B diode, C diode, D diode, transformer, triode, A resistance, B resistance, C resistance and potentiometer are formed; After A electric capacity, the parallel connection of A resistance and the elementary series connection of transformer; Connect the 220V power supply then; Transformer secondary connects the rectifier bridge that A diode, B diode, C diode, D diode are formed, and connects the output of power supply behind the output series connection B resistance of rectifier bridge, and B electric capacity is connected in parallel on the output of power supply; Current sampling resistor is connected on LED group lower end; Sampling voltage offers the base stage of triode, is parallel to power output end after the collector electrode series connection protective resistance of triode, the emission collection series connection of the base stage of triode, resistance, light adjusting potentiometer, triode.
Described load LED group is series, parallel or series-parallel connection.
Described transformer be boost, the isolating transformer of step-down or 1: 1.
Elementary series connection one resistance-capacitance network of described isolating transformer.
The rectifier bridge that A diode, B diode, C diode, D diode are formed can use a rectifying block to replace.
Can cancel potentiometer resistance, the emission collection series connection of the base stage of triode, resistance, triode.
The utility model has the advantages that: circuit is simple, advantages of small volume, with low cost, esy to use, safe and reliable.Owing to adopted isolating transformer,, do not have the danger of electric shock even touch damaged lead accidentally during operation yet; While is at the elementary resistance-capacitance depressurization network that has been connected in series of transformer; Reduce the voltage on the transformer, greatly reduced the technological requirement of transformer, reduced the volume of transformer; Reduced production cost, installed and used also convenient.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment
As shown in the figure; The utility model comprises LED group and light modulation drive circuit; The light modulation drive circuit is by A capacitor C1, B capacitor C2, and A diode D1, B diode D2, C diode D3, D diode D4, transformer T1, triode Q1, A resistance R 1, B resistance R 2, C resistance R 3 and potentiometer W1 form; The elementary series connection of A capacitor C 1, A resistance R 1 parallel connection back and transformer T1; Connect the 220V power supply then; The secondary rectifier bridge that meets A diode D1, B diode D2, C diode D3, D diode D4 of transformer T connects the output of power supply after the output of the rectifier bridge series connection B resistance R 2, B capacitor C 2 is connected in parallel on the output of power supply; Current sampling resistor R4 is connected on LED group lower end; Sampling voltage offers the base stage of triode Q1, is parallel to power output end, the emission collection series connection of the base stage of triode Q1, resistance R 4, light adjusting potentiometer W1, triode Q1 behind the collector electrode series connection protective resistance R3 of triode Q1.
Described load LED group is series, parallel or series-parallel connection.
Described transformer be boost, the isolating transformer of step-down or 1: 1.
Elementary series connection one resistance-capacitance network of described isolating transformer.
The rectifier bridge that A diode D1, B diode D2, C diode D3, D diode D4 form can use a rectifying block to replace.
Can cancel potentiometer W1 resistance, the emission collection series connection of the base stage of triode Q1, resistance R 4, triode Q1.
Ac input end connects the 220V alternating current, and LED has adopted 5 strings 2 series-parallel connection mode also, the about 0.5W of power consumption, and output voltage has only 16V, and has adopted isolating transformer, makes that this utility model is safe and reliable.

Claims (6)

1. use in sewing machine LED illuminating lamp; Comprise LED group and light modulation drive circuit, it is characterized in that the light modulation drive circuit is made up of A capacitor (C1), B capacitor (C2), A diode (D1), B diode (D2), C diode (D3), D diode (D4), transformer (T1), triode (Q1), A resistance (R1), B resistance (R2), C resistance (R3) and potentiometer (W1); The elementary series connection of A electric capacity (C1), A resistance (R1) parallel connection back and transformer (T1); Connect the 220V power supply then; The secondary rectifier bridge that connects A diode (D1), B diode (D2), C diode (D3), D diode (D4) of transformer (T1) connects the output of power supply behind the output of the rectifier bridge series connection B resistance (R2), B electric capacity (C2) is connected in parallel on the output of power supply; Current sampling resistor (R4) is connected on LED group lower end; Sampling voltage offers the base stage of triode (Q1), is parallel to power output end after the collector electrode series connection protective resistance (R3) of triode (Q1), the emission collection series connection of the base stage of triode (Q1), resistance (R4), light adjusting potentiometer (W1), triode (Q1).
2. a kind of use in sewing machine LED illuminating lamp light adjusting circuit according to claim 1 is characterized in that: described load LED group is series, parallel or series-parallel connection.
3. a kind of use in sewing machine LED illuminating lamp light adjusting circuit according to claim 1 and 2 is characterized in that: described transformer be boost, the isolating transformer of step-down or 1: 1.
4. a kind of use in sewing machine LED illuminating lamp light adjusting circuit according to claim 1 and 2 is characterized in that: elementary series connection one resistance-capacitance network of described isolating transformer.
5. a kind of use in sewing machine LED illuminating lamp light adjusting circuit according to claim 1 and 2 is characterized in that: the rectifier bridge that A diode (D1), B diode (D2), C diode (D3), D diode (D4) are formed replaces with a rectifying block.
6. a kind of use in sewing machine LED illuminating lamp light adjusting circuit according to claim 1 and 2 is characterized in that: cancellation potentiometer (W1) resistance, the emission collection series connection of the base stage of triode (Q1), resistance (R4), triode (Q1).
CN2011203802275U 2011-10-09 2011-10-09 LED illuminating lamp for sewing machine Expired - Fee Related CN202310196U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203802275U CN202310196U (en) 2011-10-09 2011-10-09 LED illuminating lamp for sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203802275U CN202310196U (en) 2011-10-09 2011-10-09 LED illuminating lamp for sewing machine

Publications (1)

Publication Number Publication Date
CN202310196U true CN202310196U (en) 2012-07-04

Family

ID=46379002

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203802275U Expired - Fee Related CN202310196U (en) 2011-10-09 2011-10-09 LED illuminating lamp for sewing machine

Country Status (1)

Country Link
CN (1) CN202310196U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014082363A1 (en) * 2012-11-28 2014-06-05 Feng Lin Led drive circuit and led illumination device
CN104160785A (en) * 2012-12-27 2014-11-19 冯林 LED drive circuit and Led illumination device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014082363A1 (en) * 2012-11-28 2014-06-05 Feng Lin Led drive circuit and led illumination device
CN104160785A (en) * 2012-12-27 2014-11-19 冯林 LED drive circuit and Led illumination device

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120704

Termination date: 20121009

C17 Cessation of patent right