CN202494714U - Novel electroscope - Google Patents

Abstract

The utility model discloses a new type of electroscope. Two metal probes of the electroscope are connected to two ends of a light-emitting diode and a current limiting resistor in series and are fixed in an insulating housing. The metal probes protrude from the end of the housing. The new type of electroscope pen has simple structure, low manufacturing cost, easy to use, easy to carry, stable and reliable, and the luminous brightness is better than that of ordinary electroscope pen neon tube indication when testing electricity; when using this electroscope pen, it does not need to form a circuit between the human body and the earth, At the same time, the live wire and neutral wire are detected, which improves the safety and accuracy of the electrical inspection process, and improves the judgment speed of electrical faults. Therefore, do not use high-precision instruments and reduce the cost of inspection instruments.

Description

A new type of electroscope pen

technical field

The utility model relates to an electrical testing tool, in particular to an electroscope pen. the

Background technique

At present, single-phase double-pole low-voltage air switches are widely used in industrial and civilian low-voltage power distribution boxes, residential and commercial building centralized and household distribution boxes, wall plugs, ground plugs, mobile multi-purpose power supplies, conversion sockets, etc. A large number of applications are used in various domestic electricity consumption and industrial and agricultural production electricity consumption. the

When the above-mentioned components work abnormally, we often rely on common low-voltage electroscope pens to test whether the live wire is electrified. This kind of electroscope uses electric current to pass through the electroscope, human body, and the earth to form a loop, and its leakage current makes the neon bubble glow and work, but the neon tube is an inflatable glass tube that is easy to leak and fail, and the electric power safety work regulations stipulate , Before the electric inspection, the test should be carried out on the electric equipment to confirm that the electric inspection is good. When using the test pen, you must also touch the metal part at the end of the test pen with your hand, and the metal probe at the tip of the pen touches the live equipment, otherwise the neon bulb in the test pen will not emit light because there is no circuit formed between the charged body, the test pen, the human body and the earth , resulting in a misjudgment that the charged body is not charged. Therefore, for the sake of safety, it is stipulated that wet hands cannot be tested, which is very troublesome for installation and maintenance. the

In addition, we know that the electroscope distinguishes the phase line and the neutral line by observing the neon bulbs. The neon bulbs that are bright are the phase lines, and the ones that are not bright may be the neutral lines. However, when the neutral line is open or normal, the neon bulbs do not light up, so Ordinary electroscope pens cannot accurately determine the working status of the zero line. At this time, we can only judge with the help of a multimeter. The multimeter is a multi-range and multi-range precision instrument, which is expensive, bulky and inconvenient to carry, and the operation is also relatively complicated. the

Utility model content

The technical problem to be solved by the utility model is to realize a convenient double-probe electroscope pen. the

In order to achieve the above object, the technical solution adopted by the utility model is: a new type of electroscope pen, two metal probes of the electroscope pen are connected in series with the two ends of the light-emitting diode and the current-limiting resistor and fixed in the insulating shell, and the metal probes are composed of The housing end protrudes. the

The shell is columnar, with a metal probe at one end and a light emitting diode at the other end. the

The two metal probes are parallel to each other, and the spacing is the same as the left and right spacing between the upper pile head or the lower pile head of the single-phase bipolar air switch. The distance between the two sockets in the socket matches. the

The resistance value of the current limiting resistor is 100K-120KΩ. the

The utility model has the advantages of simple structure, low manufacturing cost, easy to use, easy to carry, stable and reliable, and the luminous brightness is better than the neon tube indication of the ordinary electric pen when testing the electricity; when using the electric pen, no The human body and the earth form a loop, and the live wire and neutral wire are detected at the same time, which improves the safety and accuracy of the electrical inspection process and improves the judgment speed of electrical faults. Therefore, do not use high-precision instruments and reduce the cost of inspection instruments. the

Description of drawings

The following is a brief description of the content expressed in each accompanying drawing in the specification sheet of the utility model and the marks in the figure:

Fig. 1 is the schematic diagram of electroscope structure;

Fig. 2 is the circuit diagram of electroscope pen;

The marks in the above figures are: 1. shell; 2. metal probe; 3. light-emitting diode; 4. current-limiting resistor. the

Detailed ways

Referring to Figures 1 and 2, it can be seen that the two ends of the series-connected light-emitting diode 3 and the current-limiting resistor 4 are respectively connected to two metal probes 2 of the electroscope pen. Two metal probes 2 protrude from one end of the housing 1 in parallel, and the other end of the housing 1 is fixed with a light-emitting diode 3, so that it is convenient to use the electroscope pen to check whether the equipment is charged from the end. The light-emitting diode 3 can choose a red tube with a diameter of about 5 mm, and requires an operating voltage of 1.8-2.7V, an operating current of 2-20mA, a resistance value of the current-limiting resistor 4 of 100K-120KΩ, and a power of more than 1/2W. the

The distance between the two metal probes 2 is exactly the same as the left and right distance between the upper pile head or the lower pile head of the single-phase bipolar air switch. The spacing is consistent, and the human body and the earth do not need to form a circuit during the electric test. Therefore, when using this electric test pen, the operator’s fingers are not required to keep dry, and the operation is very simple. Therefore, when using this electric test pen, insert the metal probe 2 into the bipolar The electric test can be done in the two terminals of the upper pile head or the lower pile head of the air switch or the two sockets. At this time, the voltage signal reaches the other metal probe 2 through a metal probe 2, a light-emitting diode 3 and a current limiting resistor 4. If it is detected The live and neutral wires of the test equipment are powered normally, and the detection circuit forms a closed loop through the external line to make the LED 3 emit light. If the power supply of either live or neutral wire is abnormal, the LED has no indication. the

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various insubstantial improvements are carried out by adopting the method concept and technical solutions of the present invention, or without Improvements that directly apply the concept and technical solutions of the present invention to other occasions are within the protection scope of the present utility model. the

Claims (4)

1. novel electroscope is characterized in that: light emitting diode (3) and current-limiting resistance (4) two ends that two metal probes of electroscope (2) connect series connection also are fixed in the insulation shell (1), and described metal probe (2) is stretched out by housing (1) end.

2. novel electroscope according to claim 1 is characterized in that: described housing (1) is column, and the one of which end is provided with metal probe (2) other end and is provided with light emitting diode (3).

3. novel electroscope according to claim 1 and 2; It is characterized in that: two described metal probes (2) are parallel to each other; And spacing and single-phase bipolar air switch up and down pile crown or down two binding posts of pile crown between left and right apart from identical, or insert with wall, insert and movable multipurpose power source conversion socket in two socket spacings match.

4. novel electroscope according to claim 3 is characterized in that: described current-limiting resistance (4) resistance is 100K-120K Ω.

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