CN2282193Y

CN2282193Y - Acousto-optic display multifuncional test pencil

Info

Publication number: CN2282193Y
Application number: CN 96221389
Authority: CN
Inventors: 林耀辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-26
Filing date: 1996-08-26
Publication date: 1998-05-20
Anticipated expiration: 2006-08-26

Abstract

The utility model belongs to a test pencil. The model connects in parallel an acoustic-optic display test circuit comprised by a crystal triode amplifying circuit, a light-emitting diode LED serving as the load and a buzzer on a traditional test circuit comprised by a neon glim NG, a current-limiting resistor r1 and so on. The test pencil not only can test whether the measure body is charged but also can judge whether the electricity circuit is on or not and whether the electrical apparatus element is good or not. The utility model has the characteristics of a novel structure, the acoustic-optic displaying, the miscellaneous functions, the high dependability, the convenient operation and so on.

Description

Acousto-optic shows multifunction test pencil

The utility model is a kind ofly can test whether 100～500V combined-voltage exists and the luminous and sounding type proving installation of test circuit break-make, electric elements quality, belongs to the test pencil scope.

Existing test pencil is in insulation crust, is in series by test contact, resistance, neon tube, metal spring, hand touched electrode.When test contact contact testee, staff contact hand touched electrode, when testee has high potential with respect to the earth, the neon tube starter, the expression testee is charged.But whether this class test pencil can only test voltage exist, powerless to test wires road break-make or electric elements quality.

The purpose of this utility model provides a kind of acoustic luminous test pencil, and whether make it can not only measure testee charged, and the quality of test circuit break-make and electric elements easily.

The purpose of this utility model is achieved in that in an insulation shell, is containing one by probe, neon tube NG, current-limiting resistance R ₁, the neon tube that is electrically connected to form in proper order of hand touched electrode shows that on the basis of test circuit, in parallel one by biasing resistor R ₂, transistor T ₁, T ₂, LED, hummer FM, K switch and power supply the E sound, the light demonstration test circuit that constitute.Biasing resistor R ₂One end connects probe, and the other end connects T ₁Base stage, T ₁Emitter connect T ₂Base stage, after LED and the hummer FM parallel connection as T ₂Load, an end connects T ₂Collector, the other end connects T ₁Collector and K switch, the other end of K switch connects the hand touched electrode, power supply E is connected to hand touched electrode and T ₂Between the emitter.

The utility model, simple in order to make wiring, neon tube can be shown neon tube NG and current-limiting resistance R in the test circuit ₁After being connected in series, an end connects probe, and the other end connects T ₂Emitter and the negative pole of power supply E, the positive pole of power supply E connects the hand touched electrode.

Using method of the present utility model is as follows: whether charged when testing testee when, with probe contact testee, hand tentacle touched electrode if neon tube NG starter sends ruddiness, represents that then testee has high potential, and is identical with traditional test pencil.If press K switch simultaneously, lumination of light emitting diode then, hummer is sounded.If probe touches the zero line of alternating current, then neon tube does not work, and lumination of light emitting diode is only arranged, the hummer sounding.If test the whether quality of conducting or electric elements of certain section electric line, the two ends of tested wire or element should be connected to probe and hand touched electrode respectively, press out and K, if lumination of light emitting diode, the hummer sounding, represent that then this section electric wire is communicated with or this element conductive, otherwise represent that this section electric wire disconnects or not conducting of element.

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

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is the electrical schematic diagram of embodiment.

Fig. 3 is the outside drawing of embodiment.

Fig. 4 and Fig. 5 are the internal structural maps of embodiment.

Among the figure, 1, probe 2, insulation a shell 3, spring 4, neon tube NG 5, circuit board 6, light emitting diode 7, resistance 8, transistor 9, contact copper sheet 10, hummer 11, spring 12, battery E 13, the plastics cap for brush 14, hand touched electrode (crosshead screw) 15, nut 16, K switch (penholder).

Present embodiment, R ₁Resistance be 1～1.5M Ω, R ₂Be 10M Ω, T ₁And T ₂Model be 9013, for ease of the color of difference neon tube, LED is selected green for use, FM is a hummer, power supply E adopts the 3V battery.

With the method for attachment that each element is pressed Fig. 1 or Fig. 2, be produced on the circuit board, be loaded among the shell, as Fig. 4, shown in Figure 5.K switch is produced on the penholder, specious, easy to operate.

Its principle of work is: during test voltage, forefinger is by the touched electrode 14 of stopping, and thumb is pressed switch 16, and when probe touched 100～500V combined-voltage, neon tube 4 starters sent ruddiness, and electric current is through resistance R simultaneously ₂To triode T ₁Base stage, triode T ₁, T ₂Conducting, light emitting diode 6, hummer 10 have electric current to pass through, and light emitting diode sends green glow, and hummer is sounded.When test wires road or electric elements break-make, thumb is pressed switch 16, if electric line conducting or component resistance value are less, then A end (probe 1) is equivalent to be communicated with B end (hand touched electrode 15), and source current flows to the A end through the B end, to resistance R ₂, triode T ₁Base stage, triode T ₁, T ₂Conducting, LED, hummer FM have electric current to pass through, and LED sends green glow, and hummer is sounded, but neon tube starter not.

The utility model has following features: can not only test object whether charged, can also test electricity Whether circuit the quality of conducting and electric elements, enlarges the use function of traditional test pencil; Adopt electricity The road plate connects, the reliability height; Switch is located on the shell penholder, and is specious, easy to operate; During test Sound have light, has audio visual effect.

Claims

1, a kind of test pencil in an insulation shell (2), contains one by probe (A), neon tube NG, current-limiting resistance R ₁, the neon tube that is electrically connected to form of hand touched electrode (B) order shows test circuit, it is characterized by: between probe (A) and hand touched electrode (B), also have one by biasing resistor R ₂, transistor T ₁, T ₂, LED, hummer FM, K switch and power supply the E sound, the light demonstration test circuit that constitute, biasing resistor R ₂One end connects probe (A), and the other end connects T ₁Base stage, T ₁Emitter connect T ₂Base stage, after LED and the hummer FM parallel connection as T ₂Load, an end connects T ₂Collector, the other end connects T ₁Collector and K switch, the other end of K switch connects hand touched electrode (B), power supply E is connected to hand touched electrode (B) and T ₂Between the emitter.

2, test pencil according to claim 1 is characterized by: neon tube shows neon tube NG and the current-limiting resistance R in the test circuit ₁After being connected in series, an end connects probe (A), and the other end connects T ₂Emitter and the negative pole of power supply E, the positive pole of power supply E connects hand touched electrode (B).

3, test pencil according to claim 1 and 2 is characterized by: K switch is produced on the penholder of test pencil.