Focusable flashlight

摘要

A flashlight has a casing having a front end, a light source axially secured in the housing inward of the front end, and a two-part connecting sleeve forward of the light source and having a rear part secured in the housing and a front part. Interengaging formations couple the parts together for only limited axial movement relative to each other, but lock them rotationally and prevent axial separation beyond a predetermined limit. A lens is mounted in the front part. A head sleeve secured to the front part extends axially rearward over the front end of the casing so that relative axial movement of the front and rear parts axially shifts the lens relative to the source.

主权项

1. A flashlight comprising:
a casing extending along an axis and having a front end formed with a screwthread; a light source axially secured in the casing inward of the front end; a connecting sleeve forward of the light source and formed by a rear part formed with a rear screwthread secured in the screwthread of the front end of the casing and a front part formed with a front screwthread and axially shiftable relative to the rear part, one of the front and rear parts being formed with an axially extending guide groove extending across and interrupting the respective screwthreads and the other of the front and rear parts being formed with an axially extending arm fitted in and axially slidable in the groove, the arm and the groove being of part-cylindrical section centered on the axis, the arm having remote from the other part a widened head region and the groove being formed with a complementary widened region in which the head region can slide axially for only limited axial movement of the front and rear parts relative to each other while inhibiting relative rotation of the front and rear parts; a lens mounted in the front part; and a head sleeve having a screwthread secured to the front screwthread of the front part and extending axially rearward over the front end of the casing, whereby relative axial movement of the front and rear parts axially shifts the lens and the head sleeve relative to the source.