Adjustable Fit Ring

Abstract

An adjustable fit ring includes a main ring and a plurality of adjusters. The main ring has a ring inner peripheral surface, a ring outer peripheral surface, a front surface, a rear surface, a through cavity formed as a space surrounded by the ring inner peripheral surface, and a slot formed on the ring inner peripheral surface. The plurality of adjusters are received in the slot of the ring inner peripheral surface. The adjuster has an adjuster inner peripheral surface, an adjuster outer peripheral surface, and a resilient element installed on the adjuster outer peripheral surface to push against an inner wall of the ring outer peripheral surface, the adjuster being connected to the main ring to move between a resting position and a pressed-in position.

What is claimed is: 
     
         1 . An adjustable fit ring, comprising:
 a main ring having a ring inner peripheral surface, a ring outer peripheral surface, a front surface, a rear surface, a through cavity formed as a space surrounded by said ring inner peripheral surface, and a slot formed on said ring inner peripheral surface; and   a plurality of adjusters received in said slot of said ring inner peripheral surface having an adjuster inner peripheral surface, an adjuster outer peripheral surface, and a resilient element installed on said adjuster outer peripheral surface to push against an inner wall of said ring outer peripheral surface, said plurality of adjusters being connected to said main ring to move between a pressed-in position and a resting position;   wherein in said pressed-in position, said plurality of adjuster are fully received within said slot of said ring inner peripheral surface, wherein in said resting position, said resilient element is uncompressed and retains said plurality of adjusters to extend beyond said ring inner peripheral surface.   
     
     
         2 . The adjustable fit ring, as recited in  claim 1 , wherein said plurality of adjusters are provided in pairs placed symmetrically from a middle axis of said main ring. 
     
     
         3 . The adjustable fit ring, as recited in  claim 2 , wherein said plurality of adjusters are pivotally connected to said main ring. 
     
     
         4 . The adjustable fit ring, as recited in  claim 3 , wherein said adjuster outer peripheral surface of said plurality of adjusters comprises a groove and an insert housing for receiving said resilient element. 
     
     
         5 . The adjustable fit ring, as recited in  claim 4 , wherein said resilient element comprises an attaching portion and a pushing portion. 
     
     
         6 . The adjustable fit ring, as recited in  claim 5 , wherein said resilient element is formed by said attaching portion joining with said pushing portion by a single piece of metal forming a V-shape. 
     
     
         7 . The adjustable fit ring, as recited in  claim 5 , wherein said resilient element is formed by said attaching portion joining with said pushing portion by a single piece of metal wire forming a loop coil. 
     
     
         8 . The adjustable fit ring, as recited in  claim 5 , wherein said attaching portion has the same curvature as said adjuster. 
     
     
         9 . The adjustable fit ring, as recited in  claim 1 , wherein said slot is provided in an upper portion of said ring inner peripheral surface. 
     
     
         10 . The adjustable fit ring, as recited in  claim 2 , wherein said slot is provided in an upper portion of said ring inner peripheral surface. 
     
     
         11 . The adjustable fit ring, as recited in  claim 3 , wherein said slot is provided in an upper portion of said ring inner peripheral surface. 
     
     
         12 . The adjustable fit ring, as recited in  claim 4 , wherein said slot is provided in an upper portion of said ring inner peripheral surface. 
     
     
         13 . The adjustable fit ring, as recited in  claim 5 , wherein said slot is provided in an upper portion of said ring inner peripheral surface. 
     
     
         14 . The adjustable fit ring, as recited in  claim 1 , wherein said slot is provided in a lower portion of said ring inner peripheral surface. 
     
     
         15 . The adjustable fit ring, as recited in  claim 2 , wherein said slot is provided in a lower portion of said ring inner peripheral surface. 
     
     
         16 . The adjustable fit ring, as recited in  claim 3 , wherein said slot is provided in a lower portion of said ring inner peripheral surface. 
     
     
         17 . The adjustable fit ring, as recited in  claim 4 , wherein said slot is provided in a lower portion of said ring inner peripheral surface. 
     
     
         18 . The adjustable fit ring, as recited in  claim 5 , wherein said slot is provided in a lower portion of said ring inner peripheral surface. 
     
     
         19 . An adjustable fit ring, comprising:
 a main ring having a ring inner peripheral surface, a ring outer peripheral surface, a front surface, a rear surface, a through cavity formed as a space surrounded by said ring inner peripheral surface, and a slot formed on said ring inner peripheral surface; and   a secondary adjuster received in said slot of said ring inner peripheral surface having an adjuster inner peripheral surface, an adjuster outer peripheral surface, and a resilient element installed on said adjuster outer peripheral surface to push against an inner wall of said ring outer peripheral surface, said secondary adjuster being connected to said main ring to move between a pressed-in position and a resting position;   wherein in said pressed-in position, said secondary adjuster is fully received within said slot of said ring inner peripheral surface, wherein in said resting position, said resilient element is uncompressed and retains said secondary adjuster to extend beyond said ring inner peripheral surface.   
     
     
         20 . The adjustable fit ring, as recited in  claim 19 , wherein said slot is provided in an upper portion of said ring inner peripheral surface.