Rear pushbutton type switch arrangement for alluminum alloy flashlight

A rear pushbutton type switch arrangement for flashlight comprising an aluminum alloy barrel holding a battery set and a lamp assembly, an electrically conducting rotary rear cap provided at a rear side of said barrel, and a switch structure mounted in said barrel and said rotary rear cap and partially extended out of said rotary rear cap for operation by the user to switch on/off the flashlight, wherein said switch structure comprises:

• an externally threaded, electrically conducting, hollow, cylindrical metal casing, said casing having a front end threaded into a rear end of said barrel, a rear end threaded onto said rotary rear cap, a smaller front axial hole and a bigger rear axial hole axially connected in a line, and an annular stop flange in front of said small front axial hole;
• a spring set mounted in the small front axial hole of said casing, said spring set comprising an electrically insulating spring holder mounted inside said casing and stopped behind the annular stop flange of said casing, and a metal spring isolated from said casing by said spring holder, said metal spring having a front end disposed in contact with the negative terminal of said battery set and a rear end;
• a switch body mounted in the bigger rear axial hole of said casing, said 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 said metal spring, a pair of second front lead out pins bent bilaterally backwards and maintained attached to the periphery of said switch body for contacting an inside wall of said casing, and a rear switching rod;
• and
• a button coupled to the switching rod of said switch body and suspending in said rotary rear cap, said button having a press portion extended out of said rotary rear cap for operation by the user.