Rear pushbutton type switch arrangement for alluminum alloy flashlight

DETAILED DESCRIPTION The present invention has been accomplished to provide a rear pushbutton type switch arrangement for flashlight, which eliminates the aforesaid drawbacks.
It is the main object of the present invention to provide a rear pushbutton type switch arrangement for flashlight, which keeps the component parts of the switch structure firmly positioned inside the rotary rear cap after removal from the barrel of the flashlight for a replacement of the battery set.
According to the present invention, the rear pushbutton type switch arrangement for flashlight comprises an aluminum alloy barrel holding a battery set and a lamp assembly, an electrically conducting rotary rear cap provided at a rear side of the barrel, and a switch structure mounted in the barrel and the rotary rear cap and partially extended out of the rotary rear cap for operation by the user to switch on/off the flashlight.
The switch structure comprises an externally threaded, electrically conducting, hollow, cylindrical metal casing, the casing having a front end threaded into a rear end of the barrel, a rear end screwed up with the rotary rear cap, a small front axial hole and a big rear axial hole axially connected in a line, and an annular stop flange in front of the small front axial hole; a spring set mounted in the small front axial hole of the casing, the spring set comprising an electrically insulating spring holder mounted inside the casing and stopped behind the annular stop flange of the casing, and a metal spring isolated from the casing by the spring holder, the metal spring having a front end disposed in contact with the negative terminal of the battery set and a rear end; a switch body mounted in the big rear axial hole of the casing, the switch body comprising two pairs of first front lead out pins transversely arranged in parallel at a front side thereof and overlapped for connection to the rear end of the metal spring, a pair of second front lead out pin bent bilaterally backwards and maintained attached to the periphery of the switch body for contacting an inside wall of the rotary rear cap, and a rear switching rod; and a button coupled to the switching rod of the switch body and suspending in the rotary rear cap, the button having a press portion extended out of the rotary rear cap for operation by the user