Lens assembly

Abstract

A lens assembly provides an interchangeably removable frame and lens for a face mask for use in adjusting to a variety of different conditions that a user may encounter. The lens assembly beneficially provides a user with an option to interchangeably attach and detach a different lens to a face mask for a plurality of different conditions, including, but not limited to, a variety of weather conditions, a variety of eyesight accommodations, or a preferred design aesthetic. The lens assembly also beneficially provides for an easier and more efficient removal and replacement of the lens from the face mask, without a user having to remove the mask from the user's face.

What is claimed: 
     
         1 . An interchangeable lens assembly for a face mask comprising:
 a. a mask adapted to be worn over a face;   b. a lens frame removably attached to said mask; and   c. a lens disposed in said lens frame.   
     
     
         2 . The interchangeable lens assembly of  claim 1 , further comprising a latching mechanism adapted to removably attach said lens frame to said mask. 
     
     
         3 . The interchangeable lens assembly of  claim 2 , wherein said latching mechanism further comprises:
 a. a shaft member having a distal end and a proximate end, wherein said latch shaft is slidably disposed in a bore extending through said lens frame;   b. a locking tab disposed at said distal end of said shaft member;   c. a clasp member defining a recess in said mask for receiving said locking tab; and   d. a spring for biasing said locking tab in said recess of said clasp member.   
     
     
         4 . The interchangeable lens assembly of  claim 3 , further comprising a button member disposed at said proximate end of said shaft member. 
     
     
         5 . The interchangeable lens assembly of  claim 4 , wherein said spring is disposed between said button member and said lens frame. 
     
     
         6 . The interchangeable lens assembly of  claim 1 , further comprising:
 a. a second lens frame, removably attachable to said mask; and   b. a second lens disposed in said second lens frame.   
     
     
         7 . An interchangeable lens assembly for a face mask comprising:
 a. a mask adapted to be worn over a face;   b. a sub-frame attached to said mask;   c. a lens frame removably attached to said sub-frame; and   d. a lens disposed in said lens frame.   
     
     
         8 . The interchangeable lens assembly of  claim 7 , further comprising a latching mechanism adapted to removably attach said lens frame to said sub-frame. 
     
     
         9 . The interchangeable lens assembly of  claim 8 , wherein said latching mechanism further comprises:
 a. a shaft member having a distal end and a proximate end, wherein said latch shaft is slidably disposed in a bore extending through said lens frame;   b. a locking tab disposed at said distal end of said shaft member;   c. a clasp member defining a recess in said sub-frame for receiving said locking tab; and   d. a spring for biasing said locking tab in said recess of said clasp member.   
     
     
         10 . The interchangeable lens assembly of  claim 9 , further comprising a button member disposed at said proximate end of said shaft member. 
     
     
         11 . The interchangeable lens assembly of  claim 10 , wherein said spring is disposed between said button member and said lens frame. 
     
     
         12 . The interchangeable lens assembly of  claim 7 , further comprising:
 a. a second lens frame, removably attachable to said sub-frame; and   b. a second lens disposed in said second lens frame.