CN203275505U

CN203275505U - LED flash electroprobe

Info

Publication number: CN203275505U
Application number: CN 201320336428
Authority: CN
Inventors: 张红; 周岁元; 陈松
Original assignee: Shougang Shuicheng Iron and Steel Group Co Ltd
Current assignee: Shougang Shuicheng Iron and Steel Group Co Ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2013-11-06
Anticipated expiration: 2023-05-31

Abstract

An LED flash electroprobe is provided. A conductor contact rod is connected with one end of a main resistor; the other end of the main resistor is connected with one end of a spring; the other end of the spring is connected with the positive pole of a first LED and the positive pole of a second LED respectively; the negative pole of the first LED is connected with the collector of a first NPN tube through a first resistor; the negative pole of the second LED is connected with the collector of a second NPN tube through a second resistor; the emitters of the first NPN tube and the second NPN tube are grounding ends; the base of the first NPN tube is connected with the positive pole of the second LED through a fourth resistor; the base of the first NPN tube is connected with the collector of the second NPN tub through a second capacitor; the base of the second NPN tube is connected with the positive pole of the first LED through a third resistor; and the base of the second NPN tube is connected with the collector of the first NPN tube through a first capacitor. The LED flash electroprobe of the utility model can flash, which can stimulate people visually; and with the LED flash electroprobe adopted, a tester can well identify whether a luminous phenomenon exists even in a strong lighting environment, or the color vision of the tester is poor.

Description

LED blinking electroprobe

Technical field

The utility model belongs to a kind of electroprobe, relates to a kind of LED blinking electroprobe.

Background technology

Whether electroprobe is a kind of electrician's instrument, be used in test wires charged.One neon bulb being arranged in handwriting, if neon bulb is luminous during test, illustrate that wire has electricity, is perhaps the live wire of path.Nib, a tail in test pencil, make for metal material, penholder is that insulating material is made.

Present electroprobe is all luminous with neon bulb, and light intensity is general, if under extraneous strong illumination condition, perhaps the colour vision of tester's eyesight is in poor shape, and the possible indistinguishable of the light that sends is out made troubles to the tester.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of LED blinking electroprobe, can send passage of scintillation light by the LED lamp when the fire detecting line, not luminous when surveying zero line, thereby judge zero line and live wire, and passage of scintillation light can be more prone to distinguish under the strong illumination condition, and is very easy to use.

To achieve these goals, the technical solution adopted in the utility model is:

a kind of LED blinking electroprobe, conductor feeler lever 4 connects an end of main resistor 1, one end of another termination spring 2 of main resistor 1, the other end of spring 2 connects respectively the anode of a LED31 and the anode of the 2nd LED32, the negative electrode of the one LED31 connects the collector of a NPN pipe 35 by the first resistance 33, the negative electrode of the 2nd LED32 connects the collector of the 2nd NPN pipe 36 by the second resistance 34, the emission of the one NPN pipe the 35 and the 2nd NPN pipe 36 is earth terminal very, the base stage of the one NPN pipe 35 connects the anode of the 2nd LED32 by the 4th resistance 38, the base stage of the one NPN pipe 35 also connects the collector of the 2nd NPN pipe 36 by the second electric capacity 40, the base stage of the 2nd NPN pipe 36 connects the anode of a LED31 by the 3rd resistance 37, the base stage of the 2nd NPN pipe 36 also connects the collector of a NPN pipe 35 by the first electric capacity 39.

The front end of described conductor feeler lever 4 is provided with groove one.

The utility model compared with prior art has the following advantages:

What 1) passage of scintillation light can be given the people visually brings stimulation, even the strong illumination environment, perhaps the colour vision of tester's eyesight is in poor shape, and whether also can pick out well has luminescence phenomenon.

2) can effectively pick out live wire and zero line.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the circuit structure diagram of the utility model LED flashing lamp.

Embodiment

Below in conjunction with drawings and Examples, the utility model is carried out more detailed explanation.

As shown in Figure 1, the utility model is a kind of LED blinking electroprobe, and conductor feeler lever 4 connects an end of main resistor 1, one end of another termination spring 2 of main resistor 1, another termination LED flashing lamp 3 of spring 2, wherein the effect of main resistor 1 is identical with the high resistance of conventional, electric-resistance, and design load should be mega-ohms.

as shown in Figure 2, LED flashing lamp 3 comprises a LED31 and the 2nd LED32, anode both is connected with spring 2, the negative electrode of the one LED31 connects the collector of a NPN pipe 35 by the first resistance 33, the negative electrode of the 2nd LED32 connects the collector of the 2nd NPN pipe 36 by the second resistance 34, the emission of the one NPN pipe the 35 and the 2nd NPN pipe 36 is earth terminal very, the base stage of the one NPN pipe 35 connects the anode of the 2nd LED32 by the 4th resistance 38, the base stage of the one NPN pipe 35 also connects the collector of the 2nd NPN pipe 36 by the second electric capacity 40, the base stage of the 2nd NPN pipe 36 connects the anode of a LED31 by the 3rd resistance 37, the base stage of the 2nd NPN pipe 36 also connects the collector of a NPN pipe 35 by the first electric capacity 39.Wherein, the one NPN pipe the 35 and the 2nd NPN pipe 36 all adopts 2N5551, the design load of the first resistance 33 and the second resistance 34 is 200K Ω, and the design load of the 3rd resistance 37 and the 4th resistance 38 is 100K Ω, and the first electric capacity 39 and the second electric capacity 40 design loads are 100 μ F.

The principle that the utility model LED flashing lamp 3 produces scintillation is:

2 places sense electromotive force when spring, and NPN pipe the 35 and the 2nd a NPN pipe 36 begins the conducting that is at war with, and because components and parts are variant, must be a first conducting, conducting after another.If NPN pipe 35 first conductings, the collector voltage of a NPN pipe 35 will descend so, this moment, the one LED31 was lit, the left end of the first electric capacity 39 is near no-voltage, because the voltage at capacitor two ends can not suddenly change, so the base stage of the 2nd NPN pipe 36 also is pulled to approximate zero voltage, NPN pipe 36 cut-offs this moment the 2nd, the 2nd LED32 does not work.Along with power supply charges by 33 pairs of the first electric capacity 39 of the first resistance, the base voltage of the 2nd NPN pipe 36 is raise gradually, and when surpassing 0.6V (base stage is to the voltage drop of emitter), the 2nd NPN pipe 36 becomes conducting state by cut-off state, collector voltage descends, and the 2nd LED32 is lit.The meanwhile decline of the 2nd NPN pipe 36 collector voltages makes the also lower jumping of base voltage of a NPN pipe 35 by the effect of the second electric capacity 40, a NPN pipe 35 becomes cut-off by conducting, and a LED31 extinguishes.So circulation, NPN pipe the 35 and the 2nd NPN pipe 36 conducting and cut-offs in turn, a LED31 and the 2nd LED32 circulation are luminous, can change the luminous speed of circulation by the capacity that changes electric capacity.

The utility model can also be at one groove of front end setting of conductor feeler lever 4, is touching easily volume smaller contact.

Claims

1. LED blinking electroprobe, it is characterized in that, conductor feeler lever (4) connects an end of main resistor (1), one end of another termination spring (2) of main resistor (1), the other end of spring (2) connects respectively the anode of a LED (31) and the anode of the 2nd LED (32), the negative electrode of the one LED (31) connects the collector of a NPN pipe (35) by the first resistance (33), the negative electrode of the 2nd LED (32) connects the collector of the 2nd NPN pipe (36) by the second resistance (34), the emission of the one NPN pipe (35) and the 2nd NPN pipe (36) is earth terminal very, the base stage of the one NPN pipe (35) connects the anode of the 2nd LED (32) by the 4th resistance (38), the base stage of the one NPN pipe (35) also connects the collector of the 2nd NPN pipe (36) by the second electric capacity (40), the base stage of the 2nd NPN pipe (36) connects the anode of a LED (31) by the 3rd resistance (37), the base stage of the 2nd NPN pipe (36) also connects the collector of a NPN pipe (35) by the first electric capacity (39).

2. LED blinking electroprobe according to claim 1, is characterized in that, the front end of described conductor feeler lever (4) is provided with groove one.