CN2045498U - Light-emitting diode test pencil - Google Patents
Light-emitting diode test pencil Download PDFInfo
- Publication number
- CN2045498U CN2045498U CN 88221163 CN88221163U CN2045498U CN 2045498 U CN2045498 U CN 2045498U CN 88221163 CN88221163 CN 88221163 CN 88221163 U CN88221163 U CN 88221163U CN 2045498 U CN2045498 U CN 2045498U
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- China
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- test
- emitting diode
- light emitting
- triode
- electroscope
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Abstract
The utility model provides a test pencil which can test electricity and test a broken circuit and a short circuit on the alternating current circuit of 220V-380V. The utility model can be contact with a conductor to test electricity, can be separated from an insulation layer to test the electricity, can be separated from the insulation layer to look for a broken circuit point, and can qualitatively test the ebb and flow of a small capacitor, a small power diode, and a transistor. The test pencil which can test electricity and test a broken circuit and a short circuit on the alternating current circuit of 220V-380V is composed of a test contact head, a current-limiting resistor, a module with a light emitting diode, a hand contact electrode, and an outer shell. When the utility model tests the electricity and tests the broken circuit and the short circuit, the light emitting diode is used to display.
Description
The utility model relates to a kind of improved electroscope, and or rather, it is a kind of except that electrical verification, can also survey and open circuit, and the electroscope of cable in rubber cable inner conductor trip point is searched in short circuit, and test voltage exchanges 220-380V.
Existing electroscope is mainly by test contact, current-limiting resistance, and neon tube, metal spring and hand touched electrode are composed in series, when test contact contacts with tested metallic object; Whether when anthropolith contacts with the hand touched electrode, it is charged just to test metallic object.When there was high voltage in metallic object relative to the earth, the tested metallic object of the luminous indication of the neon tube in the electroscope was charged.
But neon tube is the easily gas leakage and losing efficacy of an inflation glass tube, for guarantee electrical verification accurately, electric industry rules regulation, must on known energized conductor, test electroscope before the electrical verification, confirm that electroscope is working properly, can electrical verification on measured conductor, this all is very to bother to installing and keeping in repair, particularly electrical system opens circuit, during short circuit, can only use multimeter to search, and multimeter is many gears multirange precision instrument, volume carries inconvenience greatly, operates also more complicated.
The purpose of this utility model provides a kind of improved electroscope, and it can contact the conductor electrical verification, every the insulation course electrical verification, searches cable in rubber, the cable inner conductor trip point.It is held concurrently to survey and opens circuit, short circuit, and the quality of qualitative determination small capacitor, and low-power diode, the quality of triode, whether electroscope self work normally must not carried out on known energized conductor yet, can detect by human body.
The utility model is achieved in that the neon tube in the existing electroscope is taken out, put into one by light emitting diode, the module that the semiconductor compositing amplification tube is formed, the module front end is a light emitting diode, the light emitting diode front end has a tinsel that extremely links to each other with the semiconductor input, tinsel contacts with current-limiting resistance, the module middle part is the semiconductor complex pipe, the rear end is a battery case, built-in button cell, the semiconductor compositing amplification tube is made up of three positive-negative-positive transistors or three NPN N-type semiconductor N triodes or two semiconductor positive-negative-positive pipe NPN type pipes or a semiconductor positive-negative-positive of two semiconductor N PN type pipes pipe, light emitting diode is connected in compositing amplification tube emitter or the collector circuit in the module, button cell is the power supply of compositing amplification tube, and a utmost point of power supply joins by metal spring and hand touched electrode.During electrical verification, metal probe contacts with tested metallic object, when if there is high voltage in metallic object relative to the earth, this voltage induced is to semiconductor complex pipe base stage, make the complex pipe base potential be higher than the emitter current potential, the complex pipe conducting has electric current to flow through and luminous in the light emitting diode, so reached the purpose of contact electrical verification, realized that as for other several purposes structure describes in detail in conjunction with the embodiments.
Below in conjunction with accompanying drawing the utility model principle and using method are further described.
Fig. 1 is the longitudinal sectional drawing of a kind of concrete structure of the utility model,
Fig. 2 is the structural drawing of module,
Fig. 3 is a kind of cut-away drawing of module,
Fig. 4 is a kind of electrical schematic diagram of the utility model.
With reference to Fig. 1, the test contact 1 with excellent conductive performance and physical strength is moulded casting in insulation crust 2, and test contact is made into screwdriver type shape, makes electroscope double as screwdriver.What shell 2 can be that transparent plastic does also can be that the opaque plastic that has a window is made, and whether window is luminous in order to observe light emitting diode.Shell 2 can be that pen type also can be the screwdriver shank type.Shell 2 has a conical cavity, there is the aperture 4 of a φ 0.5MM at shell 2 middle parts, test contact is joined at an end 20 of shell 2 puts in cavity and current-limiting resistance 3 from conical top a end, module 5 places current-limiting resistance 3 rear portions, the front end of module 5 is light emitting diodes 7, the rear portion of module 5 is compositing amplification tubes, the collapsed other end of light emitting diode 7 and current-limiting resistance 3 of the input utmost point 6 of compositing amplification tube joins, there is a metal ring 8 at module 5 middle parts, metal ring 8 is test poles, metal ring 8 is corresponding with aperture 4 on the shaft of a writing brush, the rear portion of module 5 is battery cases 9, battery case 9 internal batteries 10, a utmost point 11 of battery links to each other with post spring 12, post spring 12 places in the cap for brush 13, the other end of post spring 12 and hand touched electrode 14 are joined, post spring 12 can be turned to by the galvanized wire of φ 0.5MM, the cap for brush 13 is made by opaque plastic, hand touched electrode 14 stretches in the cap for brush cavity in the side near the cap for brush 13 tops, the hand touched electrode is made the pen dropper, and the cap for brush 13 is linked by spiral shell with the shaft of a writing brush 2 and connects.
With reference to Fig. 2, module 5 is made up of light emitting diode 7 semiconductor complex pipes and battery case 9, and module 5 has four extraction poles, promptly imports the utmost point 6 test poles 8 and positive source 11, power cathode 18, test pole 8 is the metal ring structure, is surrounded by the copper sheet of the wide 2MM of thick 0.1MM.Power cathode 18 is drawn by the copper wire of φ 0.5MM, and positive source 11 is drawn by the copper sheet of the wide 2MM of thick 0.1MM, in module 5 outside bendings, is advisable can put into two joint button cells.
The semiconductor complex pipe is by plastic packaging triode 15,16,17 form, triode 15,16 is staggered relatively in the root of light emitting diode 7 extraction poles, and two electrodes of light emitting diode are clipped in the middle, triode 15, it is identical with light emitting diode 7 that 16 electrodes stretch out direction, triode 17 places triode 15,16 rear portions, electrode is drawn direction and light emitting diode 7, triode 15,16 electrode is relative, triode 15,16 and triode 17 between reserve the distance of appropriate size, so that welding, then fill with insulating gel 19, module 5 profiles can be circle and also can be squarely, are advisable inserting in the shaft of a writing brush.The wiring that light emitting diode 7 and triode are 15,16,17 can directly connect also between them and can connect by printed-wiring board (PWB) as shown in Figure 3.
With reference to Fig. 4, further specify the realization of principle of the present utility model and purpose:
Further specify the realization of principle of the present utility model and purpose with reference to Fig. 4:
One, contact electrical verification, every the insulation course electrical verification, search the trip point of cable in rubber, cable:
When human body contacts with hand touched electrode 14, and with test contact 1 and approaching every the insulation course energized conductor, insulation course inner wire electric field will be sensed the base stage 6 of triode 15 by contact 1, current-limiting resistance 3, make three utmost points see 15,16,17 work, lumination of light emitting diode.
According to above-mentioned principle, one of cable in rubber that will have opens circuit locates or cable is terminated on the live wire, any wattage bulb of 220V on the other end string, the other end and the zero line of bulb join, human body contact hand touched electrode 14, and with contact 1 near tested insulated conductor by live wire one end, light emitting diode 7 is luminous, then contact 1 is moved along insulation course, readvances when contact 1 moves to the broken string place, then contact 1 shift-in with the discontiguous broken string part of live wire, light emitting diode 7 extinguishes.
Two self detect, and survey is opened circuit, short circuit, survey the quality of small capacitor:
Human body contact hand touched electrode 14, contact contact 1 simultaneously, then the positive pole 11 of battery is by spring 12, hand touched electrode 14, human body resistance, contact 1, current-limiting resistance 3 are added on the base stage 6 of triode 15, make the base potential of triode 15 be higher than the emitter current potential, triode 15 conductings, triode 15 conductings make 16 conductings of triode 16 base potential rising event triode, triode 17 conductings as a same reason, and lumination of light emitting diode explanation electroscope is working properly.
As a same reason, human body contact hand touched electrode 14 contacts an end of tested lead simultaneously, and the other end of this lead contact with contact 1, if lead is disconnected, and lumination of light emitting diode then, as if wire break, then light emitting diode 7 is not luminous on the contrary.
Surveying the small capacitor quality also is according to above-mentioned principle, human body contact hand touched electrode 14, contact a utmost point of tested small capacitor simultaneously, contact 1 contacts with another utmost point of tested small capacitor, like this, be equivalent to tested small capacitor is passed through human body resistance, between the positive pole 11 that current limliting electricity group 3 is added on battery 10 and the base stage 6 of triode 15, be good as if tested small capacitor, it will be recharged, charging beginning small capacitor is equivalent to short-circuit line, charging current is bigger, so lumination of light emitting diode is stronger, along with the minimizing of charging current, the light that light emitting diode is 7 also weakens gradually, extinguishes at last.
Three survey the quality of semiconductor low-power diode and triode:
In the aperture 4 on the utmost point insertion electrical verification shaft of a writing brush 2 of measured diode, make it to contact with test pole 8, if the end that diode inserts in the aperture 4 is a negative electrode, then electric current passes through spring 12 by the positive pole 11 of battery 10, hand touched electrode 14, diode anode, diode cathode, light emitting diode 7 is got back to the negative pole 18 of battery 10, and light emitting diode 7 is luminous.
If with diode reverse, then, concerning circuit, be equivalent to open circuit because of diode reverse resistance is big, no current is by light emitting diode 7, and light emitting diode 7 is not luminous.
Equally, the base stage of tested positive-negative-positive triode is inserted in the aperture 4 of electroscope, it is contacted with test pole 8, emitter and collector is contacted with hand touched electrode 14 respectively, then twice light emitting diode 7 is all luminous.Conversely, base stage is contacted with the hand touched electrode, emitter and collector is inserted respectively on the electroscope in the aperture 4, make it to contact with test pole 8, then twice light emitting diode is all not luminous, illustrates that triode is good.For triode is that NPN type method of testing is just in time opposite.
The utility model has simplified the electrical verification program, has improved the electrical verification accuracy, has improved failure judgment speed, has saved high-precision meter.
Claims (7)
1, a kind of electroscope is characterized in that, it is made up of the cap for brush or the bonnet 14 of a plastic casing 2 test contact 1 current-limiting resistance 3, module 5, battery 10 springs 12 and band hand touched electrode,
2, electroscope as claimed in claim 1 is characterized in that it has a module 5, and module 5 is made up of a light emitting diode 7 and a semiconductor compositing amplification tube,
3, electroscope as claimed in claim 2, the triode 15,16,17 that it is characterized in that forming the semiconductor compositing amplification tube are that three positive-negative-positives or three NPN types or NPN type of two positive-negative-positives or positive-negative-positive triode of two NPN types are formed,
4, electroscope as claimed in claim 2 is characterized in that light emitting diode 7, and triode 15,16,17 electrode are direct welding or are connected by printed-wiring board (PWB),
5, as claim 1,2 described electroscopes, it is characterized in that the space between light emitting diode and the triode 15,16,17 is all filled with insulating resin,
6, electroscope as claimed in claim 1 is characterized in that an aperture 4 is arranged on the plastic casing 2,
7, electroscope as claimed in claim 2 is characterized in that having on the module 5 an annular test pole 8, and it is corresponding with aperture 4 on the shell 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221163 CN2045498U (en) | 1988-12-13 | 1988-12-13 | Light-emitting diode test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221163 CN2045498U (en) | 1988-12-13 | 1988-12-13 | Light-emitting diode test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2045498U true CN2045498U (en) | 1989-10-04 |
Family
ID=4853243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88221163 Withdrawn CN2045498U (en) | 1988-12-13 | 1988-12-13 | Light-emitting diode test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2045498U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207320A (en) * | 2012-01-17 | 2013-07-17 | 海洋王（东莞）照明科技有限公司 | Capacitor detection circuit |
| CN108761180A (en) * | 2018-06-28 | 2018-11-06 | 深圳市华博精测科技有限公司 | Non-contact voltage Probing pen |
-
1988
- 1988-12-13 CN CN 88221163 patent/CN2045498U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207320A (en) * | 2012-01-17 | 2013-07-17 | 海洋王（东莞）照明科技有限公司 | Capacitor detection circuit |
| CN103207320B (en) * | 2012-01-17 | 2016-09-07 | 海洋王（东莞）照明科技有限公司 | Capacitive detection circuit |
| CN108761180A (en) * | 2018-06-28 | 2018-11-06 | 深圳市华博精测科技有限公司 | Non-contact voltage Probing pen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |