CN2116220U

CN2116220U - Multifunctional low voltage test pencil

Info

Publication number: CN2116220U
Application number: CN 92210318
Authority: CN
Inventors: 周铁君
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-29
Filing date: 1992-02-29
Publication date: 1992-09-16

Abstract

The utility model relates to a multifunctional low voltage test pencil which is mainly used for testing alternating current under 500 volts and is used as an alarm device when high voltage is above 10000 volts. The utility model is composed of a test pencil housing, a testing terminal, a metal contact, and a controlling circuit in the housing. The utility model is characterized in that the controlling circuit is composed of two independent neon bulb lumination circuits, an electronic switch, and an acoustic-optic circuit. The utility model with small operating current, which is provided with a contactless switch, can automatically sound and can emit lumination for avoiding that electric shock accidents happen. The utility model which has the advantages of safety and multifunction is an optimal test tool for electric staff.

Description

Multifunctional low voltage test pencil

The utility model belongs to the electrical maintenance detection and uses instrument, is mainly used in the detection of 500 volts of following alternating currents, can make general electroprobe during direct current and use.The utility model can be done the alarm use when 10,000 volts of above high pressure.

The Test pencil that uses when in the prior art, the electrician detects or keeps in repair has only neon bulb formula Test pencil.Use this Test pencil, under the strong situation of outdoor light, be difficult to find out the light of neon bulb sometimes.Particularly when neon bulb damaged, the user thought not have electricity by mistake, and electric shock accidents will take place, in order to prevent the generation of electric shock accidents, people have developed some fail safe instruments, as high pressure alarm, but it is exactly that volume is big that this quasi-instrument all has a common shortcoming, carries inconvenience.In addition, only open switch and could report to the police, opening for a long time during as work, power consumption is many, and a Battery pack uses 2 only---and 3 days, so the time spent must not shut switch, like this, alarm switch is not opened in the zone again to be strayed into that Keep Clear-High Voltage, and the danger that electric shock accidents takes place is just arranged.

The purpose of this utility model is a kind of many usefulness of development, safe and reliable Test pencil.Generation with the electric shock accidents avoiding causing because of error.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the left side view of Fig. 1

Fig. 3 is the rear view of Fig. 1.

Fig. 4 is the A-A cut-open view of Fig. 1.

Fig. 5 is a circuit diagram of the present utility model.

The utility model comprises the neon bulb illuminating circuit in Test pencil housing 3, test side 9, hard contact 8 and the housing 3. Housing 3 and test side 9 consist of screwdriver or Test pencil shape. There have the electroprobe window therefrom to can be observed neon bulb 7 on the housing 3 to be luminous. 4 is sound hole on the housing 3 among Fig. 4. 5 is piezoelectric ceramics. The characteristics of this Test pencil be in the housing 3 control circuit by two independently circuit consist of. Be neon bulb illuminating circuit and electronic circuit. The neon bulb illuminating circuit comprises neon bulb S(spare 7), resistance R A. Electronic circuit by electronic switching circuit and pronunciation, send out Optical circuit consists of. Electronic switching circuit comprises multiple tube amplifying circuit and resistance R 1, R2, capacitor C 1, C2 and the triode BG5 that is made up of triode BG1, BG2, BG3, BG4. Pronunciation, illuminating circuit comprise supporting pronunciation integrated package FT and the light emitting diode D with it by piezoelectric ceramics MS. Power supply E adopts button cell. CR is that coupling electric capacity, RC are for detecting induced voltage resistance. In addition, this Test pencil also has the electric time-keeping function, and namely electronic watch is equipped with at the electronic watch window place of housing 3. This Test pencil shell 3 can be manufactured with plastics, and electronic switch can be selected the assembling of separate piece element, and triode 3DG201 type, pronunciation circuit are selected and aimed at the supporting integrated package of piezoelectric ceramics.

When using the utility model near high-tension electricity, its nib (test side 9) obtains electric field signal, and BG1-BG4 forms complex pipe, and higher input impedance and bigger enlargement factor are arranged, on R1, obtain the voltage signal of an amplification, make the saturated and conducting of BG5, add power supply, FT work to FT, light emitting diode D is luminous, piezoelectric ceramics MS sounds, and when test side 9 did not have signal, BG1---BG5 ended.When using the utility model inspection electricity, neon bulb S is luminous, and piezoelectric ceramics MS sounds and illustrates that electricity is arranged simultaneously, if the C point and to the A point (the inspection electricity grasps the C point simultaneously), neon bulb S and luminotron D do not work.Piezoelectric ceramics MS is sounding not, proves induced voltage.Luminous as neon bulb S and light emitting diode D, piezoelectric ceramics MS also sounds, and proves supply voltage.

The utility model working current is little, adopts noncontacting switch, the automatic sounding of meeting when near high pressure, and luminous, the utility model is safe and reliable, and usefulness more than one is the optimal inspection electric tool of electrician.

Claims

1, a kind ofly many use the low pressure Test pencil, comprises the neon bulb illuminating circuit in Test pencil housing 3, test side 9, hard contact 8 and the housing 3, it is characterized in that the interior circuit of this Test pencil housing 3 by two independently circuit constitute i.e. neon bulb illuminating circuit and electronic circuit.

2, according to claim 1ly many use the low pressure Test pencil, it is characterized in that described electronic circuit is made of the electronic switching circuit and the illuminating circuit that pronounces.Electronic switching circuit comprises that the signal amplification circuit that is made of complex pipe and capacitor C 1, C2, resistance R 1, R2, triode BG5 form, and pronunciation, illuminating circuit are made up of piezoelectric ceramics MS supporting with it pronunciation integrated package FT, light emitting diode D.

3, according to claim 1 and 2 use the low pressure Test pencil more, it is characterized in that electronic watch is equipped with at electronic watch window 6 places of this Test pencil housing 3.