Patent ID: 9279570
Filing Date: 2016-03-08
CPC Classification: F21L,F21V,Y10T

Claim Text:
1. A barrel adjustment and retaining assembly, comprising: a barrel body having an end surface, an outer surface, an inner surface and an internal thread that is formed on said inner surface; a seat body having a protrusion that is registered with said end surface of said barrel body, an outer surrounding surface and an external thread that is formed on said outer surrounding surface and that is configured to engage said internal thread of said barrel body such that said seat body is movable relative to said barrel body between a pre-assembly position and an assembly position, said protrusion of said seat body being moved toward said end surface of said barrel body when said seat body moves from said pre-assembly position to said assembly position; a limiting component disposed between said protrusion of said seat body and said end surface of said barrel body such that when said seat body is in said pre-assembly position, said limiting component has a normal outer diameter, and when seat body is in said assembly position, said limiting component deforms to have an operating outer diameter greater than said normal outer diameter; and an adjustment barrel sleeved slidably on said outer surface of said barrel body, and having an end surface, a large diameter hole portion that is spaced apart from said end surface of said adjustment barrel and that has a large diameter, a small diameter hole portion that is disposed between said large diameter hole portion and said end surface of said adjustment barrel and that has a small diameter smaller than said large diameter, and a shoulder surface that is formed between said large diameter hole portion and said small diameter hole portion; wherein when seat body is in said assembly position, said operating outer diameter of said limiting component is greater than said small diameter of said small diameter hole portion so that said shoulder surface of said adjustment barrel is movable to abut against said limiting component to thereby limit said limiting component to move in said large diameter hole portion.