CN202404143U - Test pencil - Google Patents
Test pencil Download PDFInfo
- Publication number
- CN202404143U CN202404143U CN2011205036800U CN201120503680U CN202404143U CN 202404143 U CN202404143 U CN 202404143U CN 2011205036800 U CN2011205036800 U CN 2011205036800U CN 201120503680 U CN201120503680 U CN 201120503680U CN 202404143 U CN202404143 U CN 202404143U
- Authority
- CN
- China
- Prior art keywords
- test pencil
- test
- pen holder
- neon tube
- holder body
- 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
The utility model relates to a test pencil. The test pencil comprises a hollow pen holder body, a test contact arranged at the lower end of the pen holder body, a viewing window arranged on the side wall of the pen holder body, and a hand-touch metal body arranged at the upper part of the pen holder body, wherein a metal spring arranged inside the pen holder body is connected at the lower end of the hand-touch metal body; the lower end of the metal spring is sequentially connected with neon tubes and a voltage-limiting resistor through an electricity conducting plate; the voltage-limiting resistor is connected with the test contact; at least two neon tubes are provided and are connected with each other in parallel. In the test pencil, a plurality of neon tubes are connected in parallel and are serially connected with the voltage-limiting resistor, and the probability that the plurality of neon tubes are damaged at the same time is very low, so that the failing probability of the test pencil is greatly reduced.
Description
Technical field
The utility model relates to a kind of simple electrician's instrument, specifically, relates to a kind of test pencil, the test pencil of the utility model, security and better reliability.
Background technology
Test pencil also is test pencil, is called for short by " electroprobe ".Be a kind of electrician's instrument, whether chargedly be used in the test wires.One neon tube being arranged in the handwriting, if neon tube is luminous during test, explain that lead has electricity, perhaps is the live wire of path.Nib, a tail in the test pencil, process for metal material, penholder is that insulating material is processed.When using test pencil, touch the metal section and part of test pencil tail end with hand, electrified body, test pencil, human body and the earth formation loop, the neon tube in the test pencil is luminous, thinks that then tested electrified body is charged.
In the practical application, the neon tube in the test pencil is damaged sometimes, and neon tube can be not luminous when surveying electricity like this, then can cause erroneous judgement.Although before test, earlier the experiment body is tested usually, foresee the security and the reliability of test pencil,,, influence follow-up the carrying out of surveying electricity equally if the neon tube damage can not be luminous.
Based on the above-mentioned defective of test pencil in the prior art, therefore, be necessary to design the test pencil of a kind of security and better reliability.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of test pencil is provided, the test pencil of the utility model, security and better reliability.
In order to realize the purpose of the utility model, the technical scheme that the utility model adopts is:
A kind of test pencil comprises the penholder body of hollow, is arranged at the test contact of penholder body lower end; Be arranged at the view window of penholder body sidewall; The hand that is arranged at penholder body top touches metallic object, and said hand touches the metallic object lower end and is connected with the metal spring of being located at the penholder body interior, and the lower end of said metal spring is connected with neon tube, pressure limiting resistance through current-carrying plate in order; Said pressure limiting resistance is connected with test contact, and said neon tube is provided with at least two and parallel connection mutually.
The sidewall of said penholder body is provided with groove, is provided with insulating tape in the said groove.
The beneficial effect of the utility model is:
1. damage easily owing to neon tube, so connect with pressure limiting resistance after adopting a plurality of neon tube parallel connections, the probability that a plurality of neon tubes damage simultaneously is very little, greatly reduces the malfunctioning possibility of test pencil;
2. insulating tape is as electrician's a kind of aid very commonly used, and is especially using test pencil to survey in the electric process, more commonly used, and it is combined with test pencil cleverly, made things convenient for to use and carry, and during use adhesive tape pulled out to get final product.
Description of drawings
Fig. 1 is the sectional structure synoptic diagram of the utility model.
Among the figure: 1, penholder body; 2, test contact; 3, view window; 4, hand touches metallic object; 5, metal spring; 6, current-carrying plate; 7, neon tube; 8, pressure limiting resistance; 9, insulating tape.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
Embodiment: referring to Fig. 1.
A kind of test pencil comprises the penholder body 1 of hollow, is arranged at the test contact 2 of penholder body 1 lower end; Be arranged at the view window 3 of penholder body 1 sidewall; The hand that is arranged at penholder body 1 top touches metallic object 4, and said hand touches metallic object 4 lower ends and is connected with the metal spring 5 of being located at penholder body 1 inside, and the lower end of said metal spring 5 is connected with neon tube 7, pressure limiting resistance 8 through current-carrying plate 6 in order; Said pressure limiting resistance 8 is connected with test contact 2, and said neon tube 7 is provided with at least two and parallel connection mutually.
Its principle of work is, when the test contact 2 of test pencil contacts with power firestreak, hand touches metallic object 4 and contacts with staff; Electric current just touches metallic object 4 and human body through test contact 2, pressure limiting resistance 8, neon tube 7, current-carrying plate 6, metal spring 5, hand, leads to ground at last, forms the loop; Neon tube 7 is luminous, because the existence of pressure limiting resistance 8, the electric current that flows through human body is minimum; Can ignore, but the luminous prompting testee of neon tube has dangerous voltage, this is the basic functional principle of test pencil.
In actual use, mostly test pencil is neon tube if being damaged, and miscellaneous part seldom damages, and therefore, improves the security and the reliability of neon tube, is the security and the reliability that have improved test pencil.Said neon tube 7 is provided with at least two and parallel connection mutually, and such structural design as long as there is a neon tube luminous, can think that test pencil is not malfunctioning.
The sidewall of said penholder body 1 is provided with groove, is provided with insulating tape 9 in the said groove.Insulating tape is as electrician's a kind of aid very commonly used, and is especially using test pencil to survey in the electric process, more commonly used, and it is combined with test pencil cleverly, made things convenient for to use and carry, and during use adhesive tape pulled out to get final product.
The embodiment of the utility model is best embodiment; Present embodiment is not used in the protection domain of restriction the utility model; Every on the utility model basis, adopt prior art do simple no creationary be equal to alternative; Or adopt simple additional mode, all drop within the protection domain of the utility model.
Claims (2)
1. test pencil; The penholder body (1) that comprises hollow; Be arranged at the test contact (2) of penholder body (1) lower end, be arranged at the view window (3) of penholder body (1) sidewall, the hand that is arranged at penholder body (1) top touches metallic object (4); Said hand touches metallic object (4) lower end and is connected with the metal spring (5) of being located at penholder body (1) inside; The lower end of said metal spring (5) is connected with neon tube (7), pressure limiting resistance (8) through current-carrying plate (6) in order, and said pressure limiting resistance (8) is connected with test contact (2), it is characterized in that: said neon tube (7) is provided with at least two and parallel connection mutually.
2. test pencil according to claim 1 is characterized in that: the sidewall of said penholder body (1) is provided with groove, is provided with insulating tape (9) in the said groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205036800U CN202404143U (en) | 2011-12-07 | 2011-12-07 | Test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205036800U CN202404143U (en) | 2011-12-07 | 2011-12-07 | Test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404143U true CN202404143U (en) | 2012-08-29 |
Family
ID=46701783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205036800U Expired - Fee Related CN202404143U (en) | 2011-12-07 | 2011-12-07 | Test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202404143U (en) |
-
2011
- 2011-12-07 CN CN2011205036800U patent/CN202404143U/en not_active Expired - Fee Related
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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: 20120829 Termination date: 20121207 |