Focusing electric torch

Abstract

The invention relates to a focusing electric torch, which comprises an electric torch shell, a reflection cup which is arranged inside the electric torch shell, a power supply, a light source assembly and an electromagnetic focusing assembly which is arranged between the power supply and the light source assembly, wherein the electromagnetic focusing assembly is electrically connected with the power supply; and the electromagnetic focusing assembly comprises an electromagnetic focusing device and a control device for controlling the electromagnetic focusing device to produce magnetism, and the control device controls the focusing assembly to produce the magnetism so as to adjust relative positions of the light source assembly and the reflection cup. By utilizing the electromagnetic principle, the electromagnetic focusing assembly can produce the magnetism with the same polarity with the light source assembly, so that the light source assembly can be moved so as to realize the focusing purpose, and the problem of the failure of the water resistance caused by the excessive fatigue of a sealing ring because a lamp holder is rotated can be avoided; and moreover, the focusing electric torch is small in size, light in weight, small in heating volume, fewer in internal components and easy to design and produce.

Description

technical field [0001] The invention relates to a flashlight, more specifically, to an electromagnetic focusing flashlight. Background technique [0002] At present, most flashlights on the market use manual rotary focus or motor automatic focus; the defect of manual rotary focus is that as the use time increases, the flashlight rotary seal will fail due to fatigue, resulting in seal failure; and the motor Auto-focus will bring great difficulties to the design due to the large size and heavy weight of the motor, and the repeated operation is easy to generate heat. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a focusing flashlight aiming at the above defects of the prior art. [0004] The technical solution adopted by the present invention to solve the technical problem is to construct a focusing flashlight, including a flashlight casing, a reflector inside the flashlight casing, a power supply, a magnetic lig...

AI Technical Summary

Problems solved by technology

[0002] At present, most flashlights on the market use manual rotary focus or motor automatic focus; the defect of manual rotary focus is that as the use time increases, the flashlight rotary seal will fail due to fatigue, resulting in seal failure; and the motor Automatic focusing will bring great difficulties to the design because the motor is too large, heavy, and prone to heat after repeated operations.

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