Abstract: A flashlight with changeable filter structure comprising a cylindrical inner casing and a cylindrical filter base slides into the inner casing. The filter base comprises a female clasp and multiple hinge sets. On the exterior on the filter base, there are ribs and a gap. Multiple filter covers are provided and each filter cover comprises a cover and a filter. The cover is used to fix the filter. There is a hinge set on the filter cover. The hinge set is used to hook onto the hinge set of the filter base. In doing so, there are multiple filters available to meet different situation. Therefore, the operation is easier and more convenient, and saves the trouble of carrying many individual filters.

Abstract: An anti-shock flashlight comprising a body, where there is an empty compartment inside. There is a male component on the top of the body. There is an anti-shock system comprising a holder, a headpiece and a spring. The holder slides onto the body, the headpiece is suspended on the top of the body; and the spring is fixed between the holder and the headpiece. There is also a light head device comprising a head screw and a light head. There is a female component, which is screwed onto the male component on the front of the body, on the head screw. The light head comprising a light bulb and a base is placed on the top of the interior of the headpiece. The base is suspended on the top of the interior of the body, in order to reduce recoil.

Abstract: A flashlight with power supply adapter comprising a front light housing with a light bulb in the tip of the main body of the flashlight. There is a compartment in the main body for storing a rechargeable battery and a spare battery. There are also an on/off switch and a battery select switch for selecting between the rechargeable battery and the spare battery. During use, when the power of the rechargeable battery is drained, the flashlight can still be made to work by changing the battery select switch to the spare battery. As a result, the flashlight is still powered even after the main battery is used.