CN2171870Y

CN2171870Y - Electronic acoustooptical test pencil

Info

Publication number: CN2171870Y
Application number: CN 93225494
Authority: CN
Inventors: 吴锦福
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-07
Filing date: 1993-04-07
Publication date: 1994-07-13
Anticipated expiration: 2003-04-07

Abstract

The utility model relates to an electronic acoustooptical test pencil, composed of a handle, a conductive body installed outside the handle, a neon bulb installed in the handle, a current-limiting resistor, and a test head connected to the handle. An electronic acoustic generator is jointed between the incoming line of the conductive body and the electric passageways of the neon bulb and the current-limiting resistor in the handle. When the utility model is used, when the power supply is charged, not only the utility model can emit light and display through the neon bulb, but also the utility model can generate sound and notice by the electronic acoustic generator. The utility model is suitable for operating and using under the environment with strong light. The utility model has the advantage of safe and convenient use. The utility model obviously reduces the erroneous judgment accidents of the test pencils.

Description

Electronic acoustooptical test pencil

The utility model relates to a kind of electronic type acoustooptic test pencil, and the examination electricity is used under suitable daytime or the high light condition.

No matter whether present test pencil is that common neon bulb formula or electronic type are all only differentiated power supply with light source charged, because of the luminosity of this light source lower, can also clear distinguishing under low light condition, if use by day or in the environment of high light, be difficult for distinguishing light source be bright be dark, easily whether the other power supply of erroneous judgement is charged, may cause life danger.

The purpose of this utility model is that a kind of power supply of design can luminously show when charged, electronic type acoustooptic test pencil simple in structure and safe and convenient to use that again can the sounding bulletin.

The purpose of this utility model be achieved in that this test pencil by handle, be loaded on the outer electric conductor of handle and form with the survey dateline that is loaded on neon bulb, the current-limiting resistance in the handle and be connected on the handle, in handle, an electronic generator is arranged between the electric channel of electric conductor inlet wire and neon bulb, current-limiting resistance, and the electronic devices and components of electronic generator are contained on the printed-wiring board (PWB) that is fixed in the handle.When test pencil measures power supply luminous demonstration of neon bulb when electricity is arranged, electronic sound generator sounding bulletin simultaneously.

Details are as follows to structure of the present utility model below in conjunction with accompanying drawing:

Fig. 1. the shape assumption diagram of electronic type acoustooptic test pencil

Fig. 2. the electronic sound generator electrical schematic diagram of electronic type acoustooptic test pencil

1. electric conductor 2. vocal holes 3. handles 4. neon bulbs 5. are surveyed dateline R ₁. current-limiting resistance R ₂～R ₃. resistance C. electric capacity D ₁, D ₂. diode BG ₁, BG ₂. triode Y. loudspeaker E. battery

Electronic acoustooptical test pencil is loaded on the outer electric conductor of handle (3) 1 and the neon bulb 4, the current-limiting resistance R that are loaded in the handle 3 by handle (3)₁And the survey dateline 5 that is connected on the handle 3 forms, in handle 3, and the inlet wire of electric conductor 1 and neon bulb 4, current-limiting resistance R₁Electric channel between be connected to an electronic sound generator, the structure of electronic sound generator is: with inlet wire and the current-limiting resistance R of electric conductor 1₁Two diode D that join₁、D ₂, through capacitor C₁, resistance R₂With triode BG₁Link to each other, through resistance R₃Lead to the triode BG that is connected to battery E and loudspeaker Y₂ When this test pencil uses, survey dateline and touch power firestreak, when human body touched electric conductor when power supply is charged, neon bulb, survey dateline etc. formed the loop and makes the neon bulb luminescence display with ground, and simultaneously, the positive half cycle of AC power is by diode D₁To the capacitor C charging, this charging current is through resistance R₂Triode BG is provided₁A fixing bias supply passes through resistance R again₃Make triode BG₂Saturation conduction makes loudspeaker Y and battery E form the loop, thus the bulletin of loudspeaker Y sounding when accomplishing that power supply is charged, can show by neon bulb light, also can sound. For making clear sound, have one at handle hole 2 takes place.

This electronic acoustooptical test pencil, simple in structure, easy for installation, both used under the suitable low light level, also used under the suitable high light, because sound, two kinds of whiles of light display power supply have no charged function, therefore use safety, reliable, obviously reduce other accident of erroneous judgement of test pencil.

An embodiment of the present utility model does an electronic type acoustooptic test pencil shown in Fig. 1-2, the following model of the electronic component of electronic sound generator: diode D ₁, D ₂: 1N4148 R ₁: 1M R ₂: 47K R ₃: 3K C:0.33f BG:L-5 BG ₂: 2HG E:AG ₃

Claims

1, a kind of electronic type acoustooptic test pencil by handle (3), is loaded on the outer electric conductor (1) of handle (3) and the neon bulb (4), the current-limiting resistance (R that are loaded in the handle (3) ₁) and the survey dateline (5) that is connected on the handle (3) form, it is characterized in that in handle (3) inlet wire of electric conductor (1) and neon bulb (4), current-limiting resistance (R ₁) electric channel between be connected to an electronic sound generator.

2, electronic type acoustooptic test pencil according to claim 1 is characterized in that the structure of electronic sound generator is: with the inlet wire and the current-limiting resistance R of electric conductor (1) ₁Two diode D that join ₁, D ₂, through capacitor C ₁, resistance R ₂With triode BG ₁Link to each other, through resistance R ₃Lead to the triode BG that is connected to battery E and loudspeaker Y ₂