CN2556653Y

CN2556653Y - Universal test pencil

Info

Publication number: CN2556653Y
Application number: CN 02267724
Authority: CN
Inventors: 滕洪福
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2003-06-18
Anticipated expiration: 2012-06-14

Abstract

The utility model discloses a universal neon-electroscope consisting of a test contact, a plastic shell, a hand contact electrode arranged on the shell and an electronic circuit. The utility model is capable of contacting and checking an electric device and the make-and-break of circuits, carrying out short range induction and the long distance induction checking of an electrification device, furthermore, the sensitivity of the induction check can be adjusted and an illuminophore at the front end of the neon-electroscope is driven to be displayed. The utility model has the advantages of small volume, various functions, reliable work, etc, thereby being widely applicable to the measurement of various electric devices.

Description

Omnipotent test pencil

Technical field

The utility model relates to the instructed voltage existence and reaches electric equipment, circuit or element carry out short circuit, open circuit, reveal or the test of incorrect connection, especially a kind of by test contact, plastic casing and be positioned at hand touched electrode on the shell and omnipotent test pencil that electronic circuit is formed.

Background technology

The test pencil of Chu Shouing generally is to be in series by test contact, metal spring, current-limiting resistance, neon lamp and hand touched electrode in the market, and its weak point is that the neon lamp demonstration is not obvious, and has only a kind of function of contact electrical verification; In addition by the applicant invention " multifunction test pencil (and the patent No.: 91211565.3) and " omnipotent test pencil " (patent No.: 95233962.5), (97233299.5), (patent No. 00213379.5) patent No.:; these four kinds of test pencils are formed by test contact, plastic casing and the hand touched electrode and the electronic circuit that are positioned on the shell; though can to tested electrified body contact electrical verification, to the break-make of circuit test, to electrified body closely, the distance sensing electrical verification, but still have the incomplete shortcoming of function.

Summary of the invention

The purpose of this utility model just is to overcome the deficiencies in the prior art, and a kind of simple structure, multiple functional, easy to use and have a test pencil that induction electrical verification, check circuit on-off, high brightness luminescent show is provided, this test pencil can remote measurement be searched breakpoint, broadband remote measurement electric signal, measurement equipment loop break-make outside the mains isolation layer, and the front end of test pencil can whole luminous warning.

For achieving the above object, the utility model comprises test contact, plastic casing and be positioned at hand touched electrode and electronic circuit on the shell, resistance (R1) end of described test contact (T) and electronic circuit joins, the positive pole of the other end of resistance (R1) and diode (D), the A pin of integrated circuit (IC) joins, the negative pole of diode (D), the B pin of integrated circuit (IC), one end of resistance (R2), one end of the positive pole of capacitor (C2) and pushbutton switch (K) joins, the positive pole of the other end of pushbutton switch (K) and power supply (E) joins, the other end of resistance (R2) and light emitting diode (LED2) positive pole join, the positive pole of the F pin of integrated circuit (IC) and light emitting diode (LED1) joins, one end of the G pin of integrated circuit (IC) and capacitor (C1) joins, the other end of capacitor (C1), the D pin of integrated circuit (IC), light emitting diode (LED1) negative pole, the negative pole of light emitting diode (LED2), the negative pole of the negative pole of capacitor (C2) and hand touched electrode (GE) and power supply (E) joins.

The beneficial effects of the utility model are: can test to the break-make of electric equipment, to charging equipment induction electrical verification, and can adjust and the whole luminous alarm indication of anterior end of pen the sensitivity of induction electrical verification, have advantages such as volume is little, function is many, can be widely used in measurement various electric equipments.

Description of drawings

Below in conjunction with drawings and embodiments the utility model is further specified.

Fig. 1 is a front view of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Mark among the figure: plastic casing 1, test contact (T), resistance (R1), (R2), diode (D), integrated circuit (IC), capacitor (C1), (C2), light emitting diode (LED1), (LED2), pushbutton switch (K), power supply (E), hand touched electrode (GE).

Embodiment

As shown in Figure 1, test contact (T) is the metallic object with excellent conductive performance, is injection molding and is loaded on the test pencil head, and its link stretches in the plastic casing (1), is connected with the electronic circuit of installation in the housing.Hand touched electrode (GE) is embedded in the afterbody of plastic casing (1), and its link is positioned at housing and is connected with electronic circuit.Pushbutton switch (K) adopts microswitch, is flush-mounted on the plastic casing (1), and two link is connected with electronic circuit respectively.

In the circuit theory diagrams shown in Fig. 2, resistance (R1) end of test contact (T) and electronic circuit joins, the positive pole of the other end of resistance (R1) and diode (D), the A pin of integrated circuit (IC) joins, the negative pole of diode (D), the B pin of integrated circuit (IC), one end of resistance (R2), one end of the positive pole of capacitor (C2) and pushbutton switch (K) joins, the positive pole of the other end of pushbutton switch (K) and power supply (E) joins, the other end of resistance (R2) and light emitting diode (LED2) positive pole join, the positive pole of the F pin of integrated circuit (IC) and light emitting diode (LED1) joins, one end of the G pin of integrated circuit (IC) and capacitor (C1) joins, the other end of capacitor (C1), the D pin of integrated circuit (IC), light emitting diode (LED1) negative pole, the negative pole of light emitting diode (LED2), the negative pole of the negative pole of capacitor (C2) and hand touched electrode (GE) and power supply (E) joins.Wherein resistance (R2) is the current-limiting resistance of light emitting diode (LED2), and light emitting diode (LED2) is a power light, as long as press switch (K), light emitting diode (LED2) is just luminous.Capacitor (C2) is a power supply filter capacitor, is used for further stable operating voltage.The induction electrical circuit inspection is made up of test contact (T), diode (D), resistance (R1), integrated circuit (IC), capacitor (C1), light emitting diode (LED1), switch (K), battery (E) and hand touched electrode (GE).During near power supply, whether whether the luminous equipment under test that proves is charged by observing light emitting diode (LED1); Closely respond to electrical circuit inspection and form, can realize closely induction electrical verification tested electric equipment by test contact (T), resistance (R1), diode (D), integrated circuit (IC), electric capacity (C1), light emitting diode (LED1), switch (K) and working power (E); Long distance induction electroscopy circuit is made up of test contact (T), resistance (R1), diode (D), integrated circuit (IC), electric capacity (C1), light emitting diode (LED1), switch (K), power supply (E) and hand touched electrode (GE), can realize the distance sensing electrical verification to tested electric equipment.

When test pencil was idle, the C pin of integrated circuit (IC) is output signal not, and oscillator is not worked, non-output signal.

When test pencil is carried out self check, with contacting hand touched electrode (GE) on the other hand, another hand engaged test contact (T), make cathodal current give the A pin input negative signal of integrated circuit (IC) through human body, make light emitting diode (LED2) luminous, after having only proof test pencil itself working properly, just can carry out other test.

When to remote electric equipment (as power lead) when responding to electrical verification, then at first pin pushbutton switch (K) energized, hand touched electrode (GE) on the stylus shell catches, with test contact (T) near measured body, when distance measured body position suitable, if measured body is charged, the electric field of measured body will be sensed on the test contact (T), and by resistance (R1), diode (D), the A pin that is added to integrated circuit (IC) carries out signal and amplifies, signal after the amplification is by the C pin output of integrated circuit (IC), behind the E pin of integrated circuit (IC), the oscillator of being made up of this partly integrated circuit and capacitor (C1) vibrates again, and the signal after the vibration is transferred to light emitting diode (LED1) by the F pin of integrated circuit (IC) again, makes light emitting diode (LED1) luminous, because of there is on-off circuit this integrated circuit (IC) inside, when signal output was arranged, this on-off circuit was directly connected direct supply, and makes light emitting diode (LED1) highly luminescent.

After closely responding to electrical verification when (as surveying lighting loop live wire, zero line), at first pinning pushbutton switch (K) energized, with test contact (T) near measured body.When measured body distance is suitable, if when measured body is power firestreak, (LED1) is luminous for light emitting diode.Because do not contact hand touched electrode (GE) (signal is earth-free), reduce significantly so respond to electrical verification sensitivity, and be suitable for the near occasion of measurement requirement distance of reaction (as surveying zero live wire etc.).Other worker's principle is identical with the distance sensing electrical verification.

In the time will carrying out on off test to circuit, with contacting on the other hand test line one end, after another hand contact hand touched electrode (GE), with the other end of test contact (T) test test line, if when test line is path, test pencil is luminous; Otherwise when opening circuit, the unglazed demonstration of test pencil.Its principle of work is identical with the self check test principle.

Claims

1, a kind of omnipotent test pencil, by test contact, hand touched electrode on plastic casing and the shell and electronic circuit are formed, it is characterized in that: resistance (R1) end of described test contact (T) and electronic circuit joins, the positive pole of the other end of resistance (R1) and diode (D), the A pin of integrated circuit (IC) joins, the negative pole of diode (D), the B pin of integrated circuit (IC), one end of resistance (R2), one end of the positive pole of capacitor (C2) and pushbutton switch (K) joins, the positive pole of the other end of pushbutton switch (K) and power supply (E) joins, the other end of resistance (R2) and light emitting diode (LED2) positive pole join, the positive pole of the F pin of integrated circuit (IC) and light emitting diode (LED1) joins, one end of the G pin of integrated circuit (IC) and capacitor (C1) joins, the other end of capacitor (C1), the D pin of integrated circuit (IC), light emitting diode (LED1) negative pole, the negative pole of light emitting diode (LED2), the negative pole of the negative pole of capacitor (C2) and hand touched electrode (GE) and power supply (E) joins.