CN202393820U - Inductive test pen - Google Patents
Inductive test pen Download PDFInfo
- Publication number
- CN202393820U CN202393820U CN2011205168551U CN201120516855U CN202393820U CN 202393820 U CN202393820 U CN 202393820U CN 2011205168551 U CN2011205168551 U CN 2011205168551U CN 201120516855 U CN201120516855 U CN 201120516855U CN 202393820 U CN202393820 U CN 202393820U
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- CN
- China
- Prior art keywords
- resistance
- battery
- light emitting
- emitting diode
- power switch
- 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
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Abstract
An inductive test pen consists of a power supply switch, a pen case, a battery negative electrode spring, a battery, a battery positive electrode metal pad, a circuit board, a light emitting diode and a test electrode, wherein the test electrode is arranged on the front end of the pen case and is fixed with the pen case as a whole; the light emitting diode, the circuit board, the battery positive electrode metal pad, the battery and the battery negative electrode spring are sequentially mounted in the pen case; the power supply switch is screwed in the port at the tail part of the pen case in a threaded connection manner; the positive joint of the power supply switch is connected with the battery positive electrode metal pad; and the negative joint of the power supply switch is connected with the battery positive electrode spring.
Description
Technical field
The utility model relates to the electrotechnical measurement technology, particularly a kind of induction type test pencil.
Background technology
At present, the test pencil of widespread use all need directly contact object being measured with test electrode, and this test pencil uses just inconvenient in some specific occasions.For example, whether when the test electrode of test pencil can not directly contact with object being measured, it is charged just can not to test object being measured.
Summary of the invention
The purpose of the utility model is to overcome the above-mentioned deficiency of prior art and a kind of induction type test pencil is provided.
The technical scheme of the utility model is: a kind of induction type test pencil, form by power switch, handwriting shell, GND spring, battery, anode sheet metal, circuit board, light emitting diode, test electrode;
Test electrode is located at the front end of handwriting shell; And be solidified as a whole with the handwriting shell; Light emitting diode, circuit board, anode sheet metal, battery, GND spring are installed in the handwriting shell successively; Power switch adopts thread connecting mode to be screwed in the afterbody port of handwriting shell, and the positive terminal of power switch is connected with the anode sheet metal, and the anode connector of power switch is connected with the GND spring.
Described circuit board is made up of JFET J, resistance R 1, resistance R 2, NPN transistor Q1, resistance R 3, resistance R 4, PNP transistor Q2, resistance R 5.
Test electrode is connected to JFET J grid; JFET J drain electrode is connected to resistance R 1 one ends, resistance R 2 one ends and NPN transistor Q1 base stage; JFET J source electrode is connected to resistance R 2 other ends, resistance R 4 one ends, PNP transistor Q2 collector and GND spring; NPN transistor Q1 collector is connected to PNP transistor Q2 base stage and resistance R 3 one ends; PNP transistor Q2 emitter is connected to resistance R 5 one ends; Resistance R 5 other ends are connected to the light emitting diode negative pole, and the light emitting diode positive pole is connected to resistance R 1 other end, resistance R 3 other ends and power switch one end, and the power switch other end is connected to anode sheet metal 5.
The utility model principle of work is following:
After described power switch is connected, if test electrode is sensed electric charge, JFET J conducting, NPN transistor Q1 ends, PNP transistor Q2 conducting, light emitting diode gets electric lighting; If test electrode is not sensed electric charge, JFET J ends, NPN transistor Q1 conducting, and PNP transistor Q2 ends, and the light emitting diode dead electricity is extinguished.
The utlity model has following characteristics:
The induction type test pencil that the utility model provides is simple in structure, and whether not needing directly to contact power supply, can to record object charged, uses very convenient.
Further describe below in conjunction with accompanying drawing and embodiment detailed structure the utility model.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Accompanying drawing 2 is an electrical block diagram.
Embodiment
Shown in accompanying drawing 1: a kind of induction type test pencil, form by power switch 1, handwriting shell 2, GND spring 3, battery 4, anode sheet metal 5, circuit board 6, light emitting diode 7, test electrode 8;
Test electrode 8 is located at the front end of handwriting shell 2; And be solidified as a whole with handwriting shell 2; Light emitting diode 7, circuit board 6, anode sheet metal 5, battery 4, GND spring 3 are installed in the handwriting shell 2 successively; Power switch 1 adopts thread connecting mode to be screwed in the afterbody port of handwriting shell 2, and the positive terminal of power switch 1 is connected with anode sheet metal 5, and the anode connector of power switch 1 is connected with GND spring 3.
Described circuit board 6 is made up of JFET J, resistance R 1, resistance R 2, NPN transistor Q1, resistance R 3, resistance R 4, PNP transistor Q2, resistance R 5.
Test electrode 8 is connected to JFET J grid; JFET J drain electrode is connected to resistance R 1 one ends, resistance R 2 one ends and NPN transistor Q1 base stage; JFET J source electrode is connected to resistance R 2 other ends, resistance R 4 one ends, PNP transistor Q2 collector and GND spring 3; NPN transistor Q1 collector is connected to PNP transistor Q2 base stage and resistance R 3 one ends; PNP transistor Q2 emitter is connected to resistance R 5 one ends; Resistance R 5 other ends are connected to light emitting diode 7 negative poles, and light emitting diode 7 positive poles are connected to resistance R 1 other end, resistance R 3 other ends and power switch 1 one ends, and power switch 1 other end is connected to anode sheet metal 5.
Claims (2)
1. induction type test pencil is characterized in that: a kind of induction type test pencil, form by power switch, housing, GND spring, battery, anode sheet metal, circuit board, light emitting diode, test electrode;
Described power switch is installed in the housing rear portion; The GND spring is installed in the enclosure interior rear end; The anode sheet metal is installed in the enclosure interior front end, and battery is installed between GND spring and the anode sheet metal, and the anode sheet metal is wired to power switch one end; Light emitting diode is installed in the housing front end, and test electrode is installed in housing foremost.
2. circuit board according to claim 1 is characterized in that: described circuit board is made up of JFET J, resistance R 1, resistance R 2, NPN transistor Q1, resistance R 3, resistance R 4, PNP transistor Q2, resistance R 5;
Test electrode is connected to JFET J grid; JFET J drain electrode is connected to resistance R 1 one ends, resistance R 2 one ends and NPN transistor Q1 base stage; JFET J source electrode is connected to resistance R 2 other ends, resistance R 4 one ends, PNP transistor Q2 collector and GND spring; NPN transistor Q1 collector is connected to PNP transistor Q2 base stage and resistance R 3 one ends; PNP transistor Q2 emitter is connected to resistance R 5 one ends; Resistance R 5 other ends are connected to light emitting diode 7 negative poles, and light emitting diode 7 positive poles are connected to resistance R 1 other end, resistance R 3 other ends and power switch one end, and the power switch other end is connected to the anode sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205168551U CN202393820U (en) | 2011-12-13 | 2011-12-13 | Inductive test pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205168551U CN202393820U (en) | 2011-12-13 | 2011-12-13 | Inductive test pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202393820U true CN202393820U (en) | 2012-08-22 |
Family
ID=46668734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205168551U Expired - Fee Related CN202393820U (en) | 2011-12-13 | 2011-12-13 | Inductive test pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202393820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363747A (en) * | 2017-07-05 | 2017-11-21 | 苏州鼎点盛世电子科技有限公司 | Cutting pliers |
-
2011
- 2011-12-13 CN CN2011205168551U patent/CN202393820U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363747A (en) * | 2017-07-05 | 2017-11-21 | 苏州鼎点盛世电子科技有限公司 | Cutting pliers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20121213 |