CN2061294U

CN2061294U - Multifunctional test pencil

Info

Publication number: CN2061294U
Application number: CN 89211746
Authority: CN
Inventors: 陈保国
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-10-27
Filing date: 1989-10-27
Publication date: 1990-08-29

Abstract

The utility model discloses a multifunctional test pencil which can be served as an ordinary test pencil to test that whether a conducting body with 500 volts below is electrified or not, and the multifunctional test pencil which can test logic electric level can be served as a simple tool to test the working condition of an electronic component and a lamp under the condition of no electrification or the shortage of multimeters. The utility model which has the advantages of simple structure and low cost comprises a test probe, a current-limiting resistor, the minityped module of an electronic circuit, an LED, a button shape cell, a spring, etc.

Description

Multifunctional test pencil

The present invention relates to the general multifunctional testing pen of a kind of electrician and wireless tender, particularly a kind of test pen that can substitute " multimeter " partial function.

The common test pencil of existing tradition on the current market only is applicable to merely whether make measurement circuit and other metallic object switches on and leak electricity.More " general-purpose test pencil " that some listings are arranged in recent years has and surveys the digital circuit logic level except that the simple function with common test pencil, to zero, live wire and polarity identification, surveys three kinds of functions such as lead break-make.But the identification to quality such as the semiconductor components and devices that do not connect power supply, light fixtures is then powerless, and has all generally that volume is big, the more high defective of cost.

Purpose of the present invention, to provide a kind of widely applicable in production testing and maintenance job for electrician and wireless tender exactly, the function that promptly has present common test pencil, also can be used to simultaneously the function surveying digital circuit logic level, identification zero, live wire polarity, survey the lead break-make, wish that also part semiconductor components and parts when it can be used for the access failure power supply comprise the identification of fine or not situations such as light fixture; In addition, wish that again it is a kind of convenient and practical, indispensable instrument that cost is lower.

The objective of the invention is to realize as follows.The probe of test pen (screwdriver) is injection-moulded on the plastic hollow holding rod, its probe tail end links to each other with carbon rod resistance, contacted with the carbon rod resistance other end, be core of the present invention---replace the composite members of neon bulb, the front end of its transistor line is connected with light emitting diode, tail end links to each other with two joint button cells, and the positive pole of battery communicates by the hand touched electrode that spring and penholder cover.

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is electronic schematic of the present utility model.

Now further specify the utility model in conjunction with the accompanying drawings and provide embodiment of the present utility model.

In insulation crust (2), test probe (1) is made the screwdriver shape by casting for test probe (1) with excellent conductive performance and physical strength as shown in Figure 1, makes to survey the usefulness that pen can double as loading and unloading screw instrument.Shell (2) can be that a transparent window is made or had to transparent plastic, in order to observe whether build-up of luminance of luminous red pipe.Shell (2) has a cylindrical cavity, test probe (1) links to each other with an end of carbon rod resistance (3) at an end of shell (2) lining, the other end of carbon rod resistance (3) then links to each other with the negative pole of electronic circuit module (5), and the positive pole of electronic circuit module (5) links to each other with the negative pole of button cell (7).The negative pole of light emitting diode (4) extremely links to each other with the tail end D of module (5), and another utmost point then links to each other with the positive pole of battery (7) by a copper sheet (6).Anodal and the connection copper sheet (6) of battery (7) is connected with a cylindrical spring (8).Hand touched electrode (10) is fixed on the top and moulds on the lid (9), and cylindrical spring (8) links to each other with hand touched electrode (10) and by after moulding lid (9) and loading, and makes that all parts can open circuit in closely continuous and unlikely formation in the cylindrical cavity.

The many functional test pens of making according to the present invention can be used for the following aspects:

1. test judges whether 500 volts of following circuit are charged;

2. whether survey the conductor two ends opens circuit or short circuit;

3. detect the quality of fluorescent tube and other bulb;

4. survey the quality of diode, little electric capacity;

5. the test of logic level;

6. the insulation leakagel volume leakage situation of motor and electrical equipment of surveying is judged;

7. the wire break place in the detection electric wire.

Comparing its advantage with existing several test pens is:

1. applicability is wider, especially have quality such as semiconductor components and devices to the access failure power supply, light fixture judgement, enlarged the scope of application of test pen.

2. compare with the similar functions test pen, cost is lower, and the market competitiveness is arranged.Promise to be the renewal product of common test pencil.

Claims

1, a kind of multifunctional testing pen is made up of plastic casing (2), test probe (1), current-limiting resistance (3), light emitting diode (4), electronic circuit module (5), battery (7) and hand touched electrode (10), it is characterized in that being provided with between described current-limiting resistance (3) and the hand touched electrode (10) composite members of the common neon tube of replacement that is composed in series by microelectronic circuit module (5), light emitting diode (4), two button cells (3V).

2, a kind of multifunctional testing pen according to claim 1 is characterized in that described electronic circuit micromodule (5) is to amplify complex pipe by three transistors by the high power that the Darlington circuit mode connects into.