CN2229085Y

CN2229085Y - Vibration type test pencil

Info

Publication number: CN2229085Y
Application number: CN 94244963
Authority: CN
Inventors: 张礼服
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-09
Filing date: 1994-11-09
Publication date: 1996-06-12
Anticipated expiration: 2004-11-09

Abstract

The utility model relates to a vibration type test pencil. The utility model belongs to a tool for testing the alternating current, comprising a probe head (1), a current-limiting resistor (2), an amplifying triode (3), a battery (7), a controllable silicon (4), an electric vibrator (5) and a pressing switch (8). When the utility model tests whether a conductive body is electrified or not, depending on a hand holding pens, the test pencil is perceived whether or not to vibrate to judge. The utility model can be free from the influence of the environment light rays.

Description

The oscillatory type test pencil

The utility model relates to a kind of instrument that alternating current is used of testing.

Test pencil commonly used comprises a resistance and a neon tube, when probe contact ac electricity energized conductor, relies on the electric action of resistance and human body, makes an electric current to people's safety flow through neon tube, and neon tube is luminous.The light of this test pencil neon tube when ambient brightness is bigger just seems unintelligible.

The purpose of this utility model is the structure that proposes another kind of test pencil.

This oscillatory type test pencil comprises probe, current-limiting resistance, amplifying triode, battery, controllable silicon, electrical vibrator and Push switch.Probe links to each other with the base stage of amplifying triode by current-limiting resistance, the collector of amplifying triode extremely links to each other with silicon controlled control, an electrical vibrator and an end of receiving battery after controllable silicon is connected, the other end of battery by Push switch and amplifying triode emitter and controllable silicon is anodal links to each other.The push-piece stem of Push switch is a conductor.

When this oscillatory type test pencil used, the push-piece stem of the Push switch that press...withes one's finger made switch closure, with the tested conductor of probe contact.If conductor is charged, current-limiting resistance, amplifying triode, pushbutton switch and human body form a path over the ground, make on the base stage of amplifying triode certain voltage is arranged, amplifying triode conducting in certain half cycle of alternating current through the rectification and the amplification of amplifying triode, offers trigger current of the silicon controlled control utmost point, controllable silicon is open-minded, electrical vibrator gets electric and vibrates, and takes the feel of test pencil to be subjected to the vibration of test pencil, just can learn that this conductor is charged.With this test pencil test, the tester can learn with feel whether measured conductor is charged, needn't see with observing, and therefore also just not influenced by the light and shade of ambient light.

Accompanying drawing 1 is the electrical schematic diagram of this oscillatory type test pencil;

Accompanying drawing 2 is the outside drawing of oscillatory type test pencil;

Accompanying drawing 3 is the structure principle chart of electromagnetic vibrator;

Accompanying drawing 4 is the another kind of electrical schematic diagram of oscillatory type test pencil.

Shown in the accompanying drawing 1, (1) links to each other by the base stage of current-limiting resistance (2) with amplifying triode (3) for probe, and the collector of amplifying triode extremely links to each other with the control of controllable silicon (4), an electrical vibrator (9) and an end of receiving battery (7) after controllable silicon (4) is connected.Another utmost point of battery links to each other with amplifying triode emitter and silicon controlled positive pole by Push switch (6).The push-piece stem of Push switch also conducts electricity, and therefore uses hand pressing button handle not only with closing of circuit, also makes test pencil by human body and ground conducting.Current-limiting resistance plays the size of current of placing restrictions on by human body simultaneously, guarantees the effect of safety.

Middle Vib. (9) in this oscillatory type test pencil can be the motor of a little shape, also can be an electromagnetic vibrator.The structure that is a kind of electromagnetic vibrator of similar electric bell principle of work shown in Figure 3.Have in the electromagnet (11) electric current by the time attract reed (13) that electric contact (12) is disconnected, and electric contact disconnects back electromagnet (11) and loses magnetism because of there not being electric current, reed rebounds because of the elasticity of himself, and electric contact is connected, reed just vibrates back and forth.

Electrical vibrator (9) in this oscillatory type test pencil can also replace with an electric vocalization device spare, for example, adds the news Chinese percussion instrument with integrated of chimes of doom or integrated of simulated sound language circuit.At this moment, when testee is charged, will send a voice signal.

As shown in Figure 1, this oscillatory type test pencil can also comprise a neon tube (5), and an end of neon tube links to each other with the base stage of amplifying triode, and the other end is received on the palp electrode of finger (10).During with finger contact electrode (10), can generally be as good as according to the whether bright electricity and the common examination pen electricity of having judged whether of neon tube.Electrical vibrator (9) is gone up can also a light emitting diode (8) in parallel.At this moment, when using the vibratory drilling method test, the whether bright of light emitting diode judges whether testee is charged whereby simultaneously.

The structure that is this oscillatory type test pencil shown in Figure 2.Battery two joints among the figure, Push switch places between two batteries, also can play same effect.(14) be assemblies such as amplifying triode, controllable silicon.

Controllable silicon (4) in this oscillatory type test pencil also can adopt two same thyristors, can reach same effect.Circuit when using bidirectional triode thyristor as shown in Figure 4.

Claims

1, a kind of oscillatory type test pencil, comprise probe (1), current-limiting resistance (2), amplifying triode (3), battery (7), probe links to each other with the base stage of amplifying triode by current-limiting resistance, it is characterized in that it also comprises controllable silicon (4), electrical vibrator (9) and Push switch (6), the collector of amplifying triode extremely links to each other with silicon controlled control, electrical vibrator and the two ends of receiving battery after controllable silicon and Push switch are connected, the push-piece stem of Push switch is a conductor.

2, oscillatory type test pencil as claimed in claim 1 is characterized in that described electrical vibrator (9) is a miniature motor.

3, oscillatory type test pencil as claimed in claim 1 is characterized in that described electrical vibrator (9) is an electromagnetic vibrator.

4, oscillatory type test pencil as claimed in claim 1 is characterized in that described electrical vibrator (9) is an electric vocalization device spare.

As claim 2,3 or 4 described oscillatory type test pencils, it is characterized in that 5, it comprises that also an end of a neon tube (5), neon tube links to each other with the base stage of amplifying triode, but the other end is received on the electrodes in contact (10).

6,, it is characterized in that described electrical vibrator (a 9) light emitting diode (8) upward also in parallel as claim 2,3 or 4 described oscillatory type test pencils.