CN101813724A - Test pencil - Google Patents
Test pencil Download PDFInfo
- Publication number
- CN101813724A CN101813724A CN200910058412A CN200910058412A CN101813724A CN 101813724 A CN101813724 A CN 101813724A CN 200910058412 A CN200910058412 A CN 200910058412A CN 200910058412 A CN200910058412 A CN 200910058412A CN 101813724 A CN101813724 A CN 101813724A
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- CN
- China
- Prior art keywords
- resistance
- current
- test
- electrically connected
- shunt resistance
- 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.)
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- Measuring Leads Or Probes (AREA)
Abstract
The invention relates to a test pencil capable of identifying safe and dangerous voltage. A test contact, a current-limiting resistor, a neon tube and a touch electrode are sequentially electrically connected in an insulating shell, and a branched shunt resistor is added; one end of the shunt resistor is electrically connected with the test contact, and the other end of the same is electrically connected with an identification electrode. A human body only contacts with the touch electrode to test whether a tested matter is electrified or not, and the human body simultaneously contacts with the touch electrode and the identification electrode to test whether the tested matter carries with the dangerous voltage or not.
Description
Technical field the present invention can discern safety for a kind of indication and dangerous voltage is surveyed electric installation
Background technology is present, and known examination electrical equipment structure is to be in series by test contact, current-limiting resistance, neon tube, metal spring and hand touched electrode.Test contact is contacted with measured object, staff contact hand touched electrode, when measured object has high voltage relative to the earth, the neon tube starter, the expression measured object is charged.But the metal shell of a lot of electrical equipment does not have the adventurous electric shock voltage of human body, only represents that distributed capacitance and/or normal resistance induction produce electromotive force, make the neon tube starter.General examination electrical equipment can not be distinguished adventurous electric shock voltage and non-hazardous induced potential, causes difficulty for the detection electric leakage, causes misjudgment easily.
Summary of the invention can not be distinguished the deficiency of adventurous electric shock voltage and non-hazardous induced potential in order to overcome existing examination electrical equipment, the present invention is a kind of test pencil, whether this test pencil can not only be measured measured object charged, and can distinguish dangerous electric shock voltage or non-hazardous induced potential easily.
Embodiment is connected test contact, current-limiting resistance, the neon tube of this product with the hand touched electrode, test contact links to each other with shunt resistance one end, and the shunt resistance other end links to each other with the identification electrode.Usually the current-limiting resistance resistance is several megaohms, and for guaranteeing personal safety, the shunt resistance resistance is not less than the current-limiting resistance resistance, preferably gets current-limiting resistance resistance 1-2 doubly.Test contact stretches into its cavity at insulation crust one end, contact with spring, the spring other end contacts with concentric resistance, resistance is that the longitudinal profile is an E shape with one heart, column part current-limiting resistance is higher than the pipe part as shunt resistance in the middle of it, does not run into shunt resistance when an end of neon tube is contacted with current-limiting resistance, and spring one end contacts with neon tube, the other end contacts with hand touched electrode on the bonnet, and spring pressure guarantees that each interelement reliably is electrically connected.The engaging nail that its edge of the Metal Flake identification electrode of annular resilient stretches out to the center blocks pipe shape shunt resistance outside surface, and its outward flange stretches out and invests the insulation crust outside surface.Test probe stretches into its cavity at insulation crust one end, contact with an end of current-limiting resistance that be arranged in parallel and shunt resistance simultaneously, the current-limiting resistance other end electrically contacts by neon tube, spring and hand touched electrode, shunt resistance electrically contacts by spring and identification electrode, and a dielectric isolation layer is set between two electrodes.
Claims (3)
1. test pencil, in insulation crust, test contact, current-limiting resistance, neon tube and hand touched electrode are electrically connected in proper order, it is characterized in that: test contact is electrically connected with shunt resistance one end, and the shunt resistance other end is electrically connected with the identification electrode that a human body can contact.
2. test pencil according to claim 1 is characterized in that: shunt resistance is the concentric resistance of an one with current-limiting resistance, and the resistance intermediate cylindrical partly is a current-limiting resistance with one heart, and its external circular tube partly is a shunt resistance, and column part is higher than the pipe part; The identification electrode is the annular resilient sheet metal, and the engaging nail that its edge stretches out to the center blocks pipe shape shunt resistance outside surface, and its outward flange stretches out and invests the insulation crust outside surface.
3. test pencil according to claim 1 is characterized in that shunt resistance and current-limiting resistance be arranged in parallel, is dielectric isolation layer therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058412A CN101813724A (en) | 2009-02-24 | 2009-02-24 | Test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910058412A CN101813724A (en) | 2009-02-24 | 2009-02-24 | Test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101813724A true CN101813724A (en) | 2010-08-25 |
Family
ID=42621032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910058412A Pending CN101813724A (en) | 2009-02-24 | 2009-02-24 | Test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101813724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277777A (en) * | 2015-12-09 | 2016-01-27 | 国网四川省电力公司达州供电公司 | Test pencil |
| CN105891587A (en) * | 2014-10-21 | 2016-08-24 | 镇江大成新能源有限公司 | Electricity test device for indicating voltage existence |
-
2009
- 2009-02-24 CN CN200910058412A patent/CN101813724A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891587A (en) * | 2014-10-21 | 2016-08-24 | 镇江大成新能源有限公司 | Electricity test device for indicating voltage existence |
| CN105277777A (en) * | 2015-12-09 | 2016-01-27 | 国网四川省电力公司达州供电公司 | Test pencil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Zheng Yang Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Zheng Yang Document name: Notification of Publication of the Application for Invention |
|
| DD01 | Delivery of document by public notice |
Addressee: Zheng Yang Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Zheng Yang Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100825 |