Test pencil

Abstract

The invention provides a test pencil. The test pencil comprises a test contact, a transparent insulated handle, a current-limiting resistor which is arranged on the transparent insulated handle, a neon pipe, a metal spring, a hand touch electrode, a light emitting device and a temperature sensing assembly, wherein the hand touch electrode is sequentially and electrically connected with the current-limiting resistor, the neon pipe, the metal spring and the test contact; the light emitting device comprises a battery, a switch and an LED (Light Emitting Diode) which are connected into a circuit in series; the light emitting position of the LED and a button of a the switch are arranged at the outer side of the transparent insulated handle; and the temperature sensing assembly comprises a heat conducting copper sheet and a thermometer, wherein the thermometer and a shell of the transparent insulated handle are manufactured into a whole, and a temperature sensing head of the thermometer is contacted with the test contact through the heat conducting copper sheet. The test pencil disclosed by the invention can play an illumination role in circuit test or maintenance in the dark, the temperature measurement can be simultaneously carried out while the power is tested, the working efficiency and the working safety are increased, and the test pencil has the advantages that the structure is simple, the use is convenient, safe and reliable, and the like.

Description

technical field [0001] The invention relates to a test pencil. Background technique [0002] Electric test pencil, also known as electric test pencil, is a commonly used detection tool for daily circuit detection. The existing electric test pen does not have the lighting function. When an emergency repair is needed in a dark place or at night when the circuit is powered off, the operator usually needs to prepare an additional flashlight for lighting when using the electric test pen, which is very inconvenient. , low work efficiency. [0003] In addition, the existing electric test pen can only measure electricity but not temperature. When testing electrical appliances or circuits, sometimes it is necessary to measure their temperature rise. The operator usually touches the electrical appliance after the power is turned off to judge the temperature rise of the electrical appliance. operation is neither safe nor reliable. Contents of the invention [0004] The problem to ...

AI Technical Summary

Problems solved by technology

Existing test pens do not have lighting functions. When emergency repairs are needed in dark places or at night when the circuit is powered off, the operator usually needs to prepare an additional flashlight for lighting when using the test pen, which is very inconvenient. , low work efficiency

[0003] In addition, the existing electric test pen can only measure electricity but not temperature. When testing electrical appliances or circuits, sometimes it is necessary to measure their temperature rise. The operator usually touches the electrical appliance after the power is turned off to judge the temperature rise of the electrical appliance. operation is neither safe nor reliable

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