CN101430050B - LED electric torch - Google Patents
LED electric torch Download PDFInfo
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- CN101430050B CN101430050B CN2008101629509A CN200810162950A CN101430050B CN 101430050 B CN101430050 B CN 101430050B CN 2008101629509 A CN2008101629509 A CN 2008101629509A CN 200810162950 A CN200810162950 A CN 200810162950A CN 101430050 B CN101430050 B CN 101430050B
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- circuit board
- pcb circuit
- metal sleeve
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- control circuit
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Abstract
The invention discloses an LED flashlight which comprises an LED lamp, a metal stack shell, a control circuit board and a dry battery, wherein, the metal stack shell is internally provided with a metal sleeve, the control circuit board includes a first PCB and a second PCB which is vertically fixed on the first PCB, and the first PCB and the second PCB are arranged in a T shape; the second PCB extends into the metal sleeve, the LED lamp is arranged at one end of the metal sleeve, and the other end of the metal sleeve is sealed by the first PCB; anode wiring of the first PCB is connected with anode of the dry battery, and cathode wiring of the first PCB is connected with the metal sleeve; the LED flashlight has the advantages that the internal structure is compact, the control circuit board is positioned in the metal sleeve, components and parts on the circuit board are not damaged by the shake in the using process, and the short pass is avoided.
Description
Technical field
The present invention relates to a kind of flashlight, especially relate to a kind of LED flashlight.
Background technology
General No. 1 dry cell power supply of two joints that adopts of traditional flashlight, illuminating part is a bulb, its shortcoming is that volume and weight is all bigger, power consumption simultaneously is big and carries inconvenience.Along with development of technology, the LED flashlight of the little and power consumptive province of volume has appearred.A kind of LED flashlight is arranged, comprise lamp holder, stack shell and tail-hood that the LED lamp is installed, be disposed with control circuit board and dry cell in the stack shell respectively.On the structure of flashlight, the LED lamp is connected with control circuit board by lead, and the electrode input end of control circuit board is connected with the positive terminal of dry cell, and the negative pole end of dry cell is connected with the tail-hood of flashlight.Compare original bulb-type flashlight, it is little that the LED flashlight has a volume, advantages such as power consumptive province.But still there are some shortcomings in present LED flashlight in configuration aspects simultaneously: 1, the overall structure of flashlight is compact inadequately, flashlight vibrations in use cause damage to LED lamp and components and parts easily or cause the short circuit of circuit, cause flashlight normally to use.2, usually loose contact of the shell of power cathode and flashlight, it is secretly bright suddenly to cause flashlight to be neglected.3, great power LED produces a large amount of heats when work, and the structure of existing LED flashlight is unfavorable for distributing of heat.
Aspect the control circuit of flashlight, control circuit comprises a booster circuit, and 1 joint or 2 batteries are given the power supply of LED lamp after boosting, and has reduced the quantity of battery, has promptly reduced the weight and volume of flashlight, reaches the pocket effect of flashlight.But this flashlight exists following shortcoming simultaneously: 1 joint or 2 batteries flashlights are through simply boosting, cell voltage is along with the increase of flashlight service time and descend, the operating current of LED lamp descends and descends along with cell voltage, low current can not effectively be worked even not work the LED lamp, dump energy in the battery can not make full use of at this moment, cause the utilization rate of battery low, caused the unnecessary waste of energy.
Summary of the invention
Technical problem to be solved by this invention provides the LED flashlight of a kind of compact overall structure, good reliability.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of LED flashlight, comprise the LED lamp, the metal stack shell, control circuit board and dry cell, be provided with metal sleeve in the described metal stack shell, described control circuit board comprises a PCB circuit board and the 2nd PCB circuit board, described the 2nd PCB circuit board is vertically fixed on the described PCB circuit board, the one PCB circuit board becomes T type shape with the 2nd PCB circuit board, described the 2nd PCB circuit board stretches in the described metal sleeve, described LED lamp is arranged on an end of metal sleeve, a described PCB circuit board is sealed the described metal sleeve other end, the positive pole wiring of a described PCB circuit board is connected with the positive pole of dry cell, and the negative pole wiring of a described PCB circuit board is connected with metal sleeve.
The outer periphery of a described PCB circuit board is equipped with the negative pole wiring, the centre of the one PCB circuit board is provided with anodal wiring, the components and parts of described control circuit are arranged on the 2nd PCB circuit board, control circuit electrode input end on described the 2nd PCB circuit board is connected with the wiring of the positive pole of a PCB circuit board, control circuit negative input on described the 2nd PCB circuit board is connected with the wiring of the negative pole of a PCB circuit board
Between control circuit electrode input end on described the 2nd PCB circuit board and the wiring of the positive pole of a described PCB circuit board first solder joint is arranged, between control circuit negative input on described the 2nd PCB circuit board and the wiring of the negative pole of a described PCB circuit board second solder joint and the 3rd solder joint are arranged, described second solder joint and described the 3rd solder joint are positioned at the edge of a PCB circuit board, described metal sleeve inboard is provided with ring shaped step, and described second solder joint contacts with described ring shaped step with the 3rd solder joint.
The other end of described metal sleeve is provided with breach.
Described LED lamp is a high-powered LED lamp, and described high-powered LED lamp is arranged on the aluminium base, and described aluminium base is sealed an end of metal sleeve, and the edge of described aluminium base closely contacts with the inwall of metal sleeve.
Described control circuit comprises that DC/DC regulating circuit and output are provided with circuit, described DC/DC regulating circuit comprises energy storage inductor, diode, FET, voltage regulating module and energy storage filter capacitor, described output is provided with circuit and comprises first resistance, second resistance, current sampling resistor and protrusion-dispelling power transformation are held, the 4th pin of described voltage regulating module is connected with the negative pole of dry cell and ground connection, the 6th pin of voltage regulating module is connected with the grid of described FET, the source ground of FET, the drain electrode of FET is connected with the positive pole of dry cell with switch by energy storage inductor respectively, the drain electrode of FET is connected with second pin of voltage regulating module by diode, second pin and the 3rd pin of voltage regulating module interconnect, being set side by side with described first resistance and protrusion-dispelling power transformation between first pin of voltage regulating module and second pin holds, be provided with second resistance between first pin of described voltage regulating module and the negative pole of LED lamp, second resistance is provided with the energy storage filter capacitor by current sampling resistor ground connection between second pin of voltage regulating module and the negative pole of LED.
Compared with prior art, the invention has the advantages that the 2nd PCB circuit board is vertically fixed on the PCB circuit board, the one PCB circuit board becomes T type shape with the 2nd PCB circuit board, the 2nd PCB circuit board stretches in the metal sleeve, the one PCB circuit board is sealed the metal sleeve other end, the internal structure compactness of flashlight, and control circuit board is in the metal sleeve, vibrations in the use can not cause damage to the components and parts on the circuit board, have avoided the generation of short circuit phenomenon simultaneously yet.
First solder joint, second solder joint and the 3rd solder joint are fixed on the 2nd PCB circuit board on the one PCB circuit board, and the metal sleeve inboard is provided with ring shaped step, and second solder joint contacts with ring shaped step with the 3rd solder joint.Control circuit negative input on the 2nd PCB circuit board contacts with the ring shaped step of metal sleeve, and metal sleeve contacts with the metal stack shell, and the control circuit negative input is contacted and ground connection with the metal stack shell, constitutes the loop.Because the negative pole of dry cell contacts with the metal stack shell, so power cathode closely contacts solution flashlight power supply reliability problem with flashlight shell.
Because high-powered LED lamp can produce a large amount of heats when work, if heat accumulation can't distribute, can reduce the life-span of LED lamp, the edge of aluminium base contacts with the tight of metal sleeve inwall, heat is distributed by metal sleeve and metal stack shell, solved the problem of heat radiation effectively.
The other end of metal sleeve is provided with breach, and being provided with of breach makes things convenient for the PCB circuit board in the installation of metal sleeve and the replacing or the maintenance of circuit board in the future.
Increased output in the control circuit circuit is set, comprised first resistance, second resistance, current sampling resistor and protrusion-dispelling power transformation appearance, by changing first resistance R, 1, the second resistance R 2, the value of current sampling resistor R is adjusted to suitable value with load current.After battery used a period of time, cell voltage can descend gradually, and the electric current I of the LED lamp of flowing through reduces, and then the voltage on the current sampling resistor R reduces, thereby made the voltage V on voltage regulating module the 1st pin
FBReduce V
FBCompare with the module internal reference voltage, work as V
FBThe automatic boosted output voltages of inside modules then during less than reference voltage makes V
FBConstant.Along with output voltage raises, then the LED voltage of both ends of lamp raises, thereby I is increased, and has guaranteed the constant current of I.Therefore this control circuit can make the electric current on the LED remain on constant, guarantees that LED is operated in the rated range, has increased the utilization rate of battery.
Description of drawings
Fig. 1 is a structure chart of the present invention;
Fig. 2 is the structure chart of metal stack shell of the present invention, a PCB circuit board and the 2nd PCB circuit board;
Fig. 3 is a circuit block diagram of the present invention;
Fig. 4 is circuit theory diagrams of the present invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
A kind of LED flashlight, comprise LED lamp 1, metal stack shell 2, control circuit board and dry cell 3, be provided with metal sleeve 9 in the metal stack shell 2, control circuit board comprises a PCB circuit board 4 and the 2nd PCB circuit board 5, the outer periphery of the one PCB circuit board 4 is equipped with negative pole wiring 6, the centre of the one PCB circuit board 4 is provided with anodal wiring (figure does not show), the components and parts 7 of control circuit are arranged on the 2nd PCB circuit board 5, high-powered LED lamp 1 is arranged on the aluminium base 17, aluminium base 17 is sealed an end of metal sleeve 9, and the edge of aluminium base 17 closely contacts with the inwall of metal sleeve 9.LED lamp 1 is connected with control circuit output on the 2nd PCB circuit board 5 by lead 16, control circuit electrode input end on the 2nd PCB circuit board 5 is connected with the positive pole wiring of a PCB circuit board 4, control circuit negative input on the 2nd PCB circuit board 5 is connected with the negative pole wiring 6 of a PCB circuit board 4, the 2nd PCB circuit board 5 is vertically fixed on the PCB circuit board 4,5 one-tenth T types of the one PCB circuit board 4 and the 2nd PCB circuit board shape, one end of metal sleeve 9 is fixed with LED lamp 1, the 2nd PCB circuit board 5 stretches in the metal sleeve 9, the one PCB circuit board 4 is sealed metal sleeve 9 other ends, the positive pole wiring of the one PCB circuit board 4 is connected with the positive pole of dry cell 3, and the negative pole wiring of a PCB circuit board 4 is connected with metal sleeve 9.
Between the positive pole wiring of a control circuit electrode input end on the 2nd PCB circuit board 5 and a PCB circuit board 4 first solder joint 8 is arranged, between the negative pole wiring of control circuit negative input on the 2nd PCB circuit board 5 and the 2nd PCB circuit board 5 second solder joint 10 and the 3rd solder joint 11 are arranged, second solder joint 10 and the 3rd solder joint 11 are positioned at the edge of a PCB circuit board 4, metal sleeve 9 inboards are provided with ring shaped step 12, the second solder joints 10 and contact with ring shaped step 12 with the 3rd solder joint 11.
The other end of metal sleeve 9 is provided with breach 13.Control circuit comprises that DC/DC regulating circuit 14 and output are provided with circuit 15, DC/DC regulating circuit 14 comprises energy storage inductor L1, diode D1, play the FET T1 of electronics on-off action, voltage regulating module IC1 and energy storage filter capacitor C1, output is provided with circuit 15 and comprises first resistance R 1, second resistance R 2, C2 is held in current sampling resistor R and protrusion-dispelling power transformation, the 4th pin of voltage regulating module IC1 is connected with the negative pole of dry cell 3 and ground connection, the 6th pin of voltage regulating module IC1 is connected with the grid of FET T1, the source ground of FET T1, the drain electrode of FET T1 is connected with the positive pole of switch SW with dry cell BT by energy storage inductor L1 respectively, the drain electrode of FET T1 is connected with second pin of voltage regulating module IC1 by diode D1, second pin and the 3rd pin of voltage regulating module IC1 interconnect, be set side by side with first resistance R 1 and protrusion-dispelling power transformation between first pin of voltage regulating module IC1 and second pin and hold C2, be provided with second resistance R 2 between first pin of voltage regulating module IC1 and the negative pole of LED lamp, second resistance R 2 is provided with energy storage filter capacitor C1 by current sampling resistor R ground connection between second pin of voltage regulating module IC1 and the negative pole of LED.
Claims (5)
1. LED flashlight, comprise the LED lamp, the metal stack shell, control circuit board and dry cell, it is characterized in that being provided with metal sleeve in the described metal stack shell, described control circuit board comprises a PCB circuit board and the 2nd PCB circuit board, described the 2nd PCB circuit board is vertically fixed on the described PCB circuit board, the one PCB circuit board becomes T type shape with the 2nd PCB circuit board, described the 2nd PCB circuit board stretches in the described metal sleeve, described LED lamp is arranged on an end of metal sleeve, a described PCB circuit board is sealed the described metal sleeve other end, the positive pole wiring of a described PCB circuit board is connected with the positive pole of dry cell, and the negative pole wiring of a described PCB circuit board is connected with metal sleeve.
2. a kind of LED flashlight according to claim 1, the outer periphery that it is characterized in that a described PCB circuit board is equipped with the negative pole wiring, the centre of the one PCB circuit board is provided with anodal wiring, the components and parts of described control circuit are arranged on the 2nd PCB circuit board, control circuit electrode input end on described the 2nd PCB circuit board is connected with the wiring of the positive pole of a PCB circuit board, and the control circuit negative input on described the 2nd PCB circuit board is connected with the wiring of the negative pole of a PCB circuit board.
3. a kind of LED flashlight according to claim 2, it is characterized in that between the positive pole wiring of a control circuit electrode input end on described the 2nd PCB circuit board and a described PCB circuit board first solder joint being arranged, between control circuit negative input on described the 2nd PCB circuit board and the wiring of the negative pole of a described PCB circuit board second solder joint and the 3rd solder joint are arranged, described second solder joint and described the 3rd solder joint are positioned at the edge of a PCB circuit board, described metal sleeve inboard is provided with ring shaped step, and described second solder joint contacts with described ring shaped step with the 3rd solder joint.
4. a kind of LED flashlight according to claim 1, it is characterized in that described LED lamp is a high-powered LED lamp, described high-powered LED lamp is arranged on the aluminium base, and described aluminium base is sealed an end of metal sleeve, and the edge of described aluminium base closely contacts with the inwall of metal sleeve.
5. a kind of LED flashlight according to claim 1 is characterized in that the other end of described metal sleeve is provided with breach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101629509A CN101430050B (en) | 2008-11-27 | 2008-11-27 | LED electric torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101629509A CN101430050B (en) | 2008-11-27 | 2008-11-27 | LED electric torch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101430050A CN101430050A (en) | 2009-05-13 |
| CN101430050B true CN101430050B (en) | 2010-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101629509A Active CN101430050B (en) | 2008-11-27 | 2008-11-27 | LED electric torch |
Country Status (1)
| Country | Link |
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| CN (1) | CN101430050B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742771B (en) * | 2009-12-22 | 2013-09-11 | 海洋王照明科技股份有限公司 | Portable type lamp, light dimming circuit and light dimming method |
| CN102427642A (en) * | 2011-09-28 | 2012-04-25 | 天津好为节能环保科技发展有限公司 | Constant current lighting lamp circuit using integrated component |
| CN103994336A (en) * | 2014-04-21 | 2014-08-20 | 宜春市雷恒科技有限公司 | Outdoor electric torch with Bluetooth broadcasting audio equipment function |
| CN111741571B (en) * | 2020-08-21 | 2021-01-05 | 深圳市全智芯科技有限公司 | Disconnect-type power control device and flashlight |
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2008
- 2008-11-27 CN CN2008101629509A patent/CN101430050B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101430050A (en) | 2009-05-13 |
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