CN2461001Y - Electronic test pencil - Google Patents
Electronic test pencil Download PDFInfo
- Publication number
- CN2461001Y CN2461001Y CN 01212905 CN01212905U CN2461001Y CN 2461001 Y CN2461001 Y CN 2461001Y CN 01212905 CN01212905 CN 01212905 CN 01212905 U CN01212905 U CN 01212905U CN 2461001 Y CN2461001 Y CN 2461001Y
- Authority
- CN
- China
- Prior art keywords
- test pencil
- switch
- chip
- wiring board
- pin
- 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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- Measuring Leads Or Probes (AREA)
Abstract
The utility model relates to an electronic test pencil. The inner part of a pencil holder 9 is provided with a circuit plate 11 which comprises a chip 5, a contact head 1, a light emitting diode 4, a touching hand electrode 8, a switch 7, and a converting switch 6. The contact head 1, the light emitting diode 4, the touching hand electrode 8, the switch 7 and the converting switch 6 are electrically connected with the circuit plate. The test pencil has functions for the selection of high or low sensitivity, the display and the illumination.
Description
The utility model relates to a kind of electronics test pencil.
Normally used test pencil mainly is to be in series by metal contact, current-limiting resistance, neon tube, spring and hand touched electrode.This test pencil directly contact electrification body is tested, and its insulation course can only be destroyed the back aptitude test for lead that is surrounded by insulation course or electrified body.The brightness of neon tube is also very limited, and whether be difficult for observing neon tube in the stronger occasion of light shinny.In addition, in the time of in block terminal, instrument, electrical equipment, consumer, testing with this test pencil,, can not find measurand easily accurately owing to be subjected to the restriction of ambient light.Other has a kind of test pencil of discerning safe or dangerous voltage, basic structure is identical with normally used test pencil, it mainly is to connect a branch road of being made up of shunt resistance on metal contact, and the other end of this shunt resistance links to each other with the identification electrode that a human body can contact.Though this test pencil can be distinguished out safety and dangerous voltage, but still there is above-mentioned deficiency.
The purpose of this utility model just provides a kind of novel electronic test pencil, and it can just can measure whether electricity is arranged at not direct contact electrification body, and has high and low sensitivity conversion, demonstration and illumination functions.
Above-mentioned purpose realizes by following technical solution:
It has penholder, contact and hand touched electrode and current-limiting resistance this electronics test pencil, and it mainly is to be provided with the wiring board that comprises the CD4069 chip in penholder, and switch is realized being electrically connected with wiring board.Also be provided with battery, hand touched electrode, switch, pilot lamp, current-limiting resistance and the contact, the illuminating lamp that are electrically connected with wiring board respectively on the penholder.Current-limiting resistance is series between wiring board and the contact.In the wiring board by resistance 3, triode VT
1, VT
2With light emitting diode VD
1Constitute an amplifying circuit, light emitting diode VD
4With triode VT
3Be series between 8 pin and 14 pin of chip, 7 pin of chip are exported a negative ground connection, the two ends of switch respectively with the on-off circuit conducting, the hand touched electrode directly links to each other with power supply.
Fig. 1: structural representation of the present utility model.
Fig. 2: circuit theory diagrams of the present utility model.
Below with reference to drawings and Examples the utility model is described in further detail.
As shown in Figure 1, metal contact 1 directly is fixed on the termination of penholder 9, is provided with to comprise that model is the wiring board 11 of CD4069IC chip 5 in penholder 9, the current-limiting resistance 3 of connecting between wiring board 11 and the contact 1.The tail end of penholder 9 is established a battery case that battery 10 is housed, and this battery preferably uses button cell, to dwindle the volume of whole test pencil.Battery 10 is as the working power of wiring board 11 and whole each parts of test pencil.Be provided with the hand touched electrode 8 that is made of metal and pushbutton switch 7, redness and green LED 4, illuminating lamp 2, high muting sensitivity switch 6 on penholder 9, described these parts are all realized being electrically connected with wiring board 11.
Fig. 2 shows the circuit theory of test pencil.Contact 1 is successively by current-limiting resistance 3 and diode VD
2Be connected in 1 pin of chip 5.After current-limiting resistance 3, tell one the tunnel and be in series with resistance R
2With triode VT
1After again with triode VT
2And light emitting diode 4 (VD
1) parallel connection.By resistance R
1, R
2, triode VT
1, VT
2, light emitting diode 4 constitutes a muting sensitivity work amplifying circuit.5 pin of chip 5 and 7 pin are negative ground connection.Light emitting diode 4 (VD
4) and triode VT
3Be series between 8 pin and 14 pin of chip 5.Hand touched electrode 8 positive poles direct and power supply join.At light emitting diode 4 (VD
4) and triode VT
3Between a hummer in parallel again.Illuminating lamp 2 is connected in the circuit of switch 7.Parallel resistance R on 10,11 pin of chip 5
4, R
3After the capacitor C of connecting again
1On 8 pin of chip 5.Also be connected with a diode VD between 4 pin of chip 5 and 11 pin
3The low sensitive end L and the light emitting diode 4 (VD of switch 6
1) join, and highly sensitive end H directly is connected to 1 pin of chip 5.
Carrying out electrified body when directly testing, with 6 dozens of high muting sensitivity switches to low side (L), the forceful electric power signal after current-limiting resistance 3 step-downs again through resistance R
2Enter triode VT
1Amplify, again through triode VT
2Amplify rear drive light emitting diode 4 (VD
1) send green glow.When having the hidden breakpoint of insulation course electrified body to detect again and electric elements are tested, can select high sensitivity, with 6 dozens of switches to high-end (H), when contact 1 is near electrified body during test (in the 2mm), the low current signal of sensing is through current-limiting resistance 3, diode VD
21 pin that enters chip 5 carries out one-level, secondary amplifies, again by diode VD
3Biography is carried out the third level, level Four amplification to 11 pin of chip 5, exports oscillator signal by 8 pin of chip 5 and enters triode VT
3Come driven for emitting lights diode 4 (VD
4) send red light and trigger the hummer sounding, with expression electricity or element internal being arranged is conducting state.Can be during test with finger contact hand touched electrode 8, to constitute the loop of test signal.If test,, can make that to be positioned at illuminating lamp that penholder 9 front ends are made of light emitting diode 2 shinny and shine directly into testee with hand Push switch 7 in the darker occasion of light.
The utility model so all can test forceful electric power, light current, also has red, green diode displaying, simple and clear, easy operation owing to adopted integrated circuit technique and high and low sensitivity selection conversion in test pencil.It is also advantageous in that test the time need not destroy insulation course and can measure whether electricity is arranged, guaranteed original insulating property.The illuminating lamp of penholder front portion also can be suitable for carrying out test operation under darker occasion.This pencil test structure is simple, convenient to be suitable for, and is applicable to the detection of all kinds of circuit, electrical equipment, and can increases work efficiency.
Claims (4)
1, a kind of electronics test pencil, it has penholder (9), contact (1) and hand touched electrode (8) and current-limiting resistance (3), it is characterized in that being provided with in penholder (9) wiring board (11) that comprises CD4069 chip (5), switch (6) is realized being electrically connected with wiring board (11).
2, electronics test pencil as claimed in claim 1 is characterized in that also being provided with battery (10), hand touched electrode (8), switch (7), pilot lamp (4), current-limiting resistance (3) and the contact (1), the illuminating lamp (2) that are electrically connected with wiring board (11) respectively on penholder (9).
3, electronics test pencil as claimed in claim 1 or 2 is characterized in that current-limiting resistance (3) is series between wiring board (11) and the contact (1).
4, electronics test pencil as claimed in claim 1 or 2 is characterized in that in wiring board (11) by resistance 3, triode VT
1, VT
2With light emitting diode VD
1Constitute an amplifying circuit, light emitting diode VD
4With triode VT
3Be series between 8 pin and 14 pin of chip (5), 7 pin of chip (5) are exported a negative ground connection, the two ends of switch (6) respectively with switch (7) circuit turn-on, hand touched electrode (8) directly links to each other with power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212905 CN2461001Y (en) | 2001-01-02 | 2001-01-02 | Electronic test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212905 CN2461001Y (en) | 2001-01-02 | 2001-01-02 | Electronic test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2461001Y true CN2461001Y (en) | 2001-11-21 |
Family
ID=33631993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01212905 Expired - Fee Related CN2461001Y (en) | 2001-01-02 | 2001-01-02 | Electronic test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2461001Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977456A (en) * | 2015-07-02 | 2015-10-14 | 中国石油天然气股份有限公司 | Test pencil |
| CN106199146A (en) * | 2015-04-30 | 2016-12-07 | 中国石油天然气股份有限公司 | Electroscope |
-
2001
- 2001-01-02 CN CN 01212905 patent/CN2461001Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199146A (en) * | 2015-04-30 | 2016-12-07 | 中国石油天然气股份有限公司 | Electroscope |
| CN106199146B (en) * | 2015-04-30 | 2023-10-31 | 中国石油天然气股份有限公司 | electroscope |
| CN104977456A (en) * | 2015-07-02 | 2015-10-14 | 中国石油天然气股份有限公司 | Test pencil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |