Fastening means of return air grille

Abstract

The present invention provides a fastening means of air grille including a grid face, a filtering device, a stationary frame and door latches, in which said grid face is hinged to the stationary frame with one side, and the opposite side of the grid face is fastened on the stationary frame with the door latches; wherein said door latches molded of plastic is located on the grid face in movable connection with a catching hook at the middle portion; a pushing portion is built upon the upside of the door latch, and a L-shaped catching shoe on the lower portion, above the L-shaped catching shoe the catching hook is built up for holding the grid face on, and an open slot constructed of the low leg of the L-shaped shoe and the bottom of said pushing portion is used to catch on the stationary frame. When opening the grid face, just need to push the door latches respectively to outward so as to slide off from the stationary frame, then the grid face is opened wholly; in this case, locking or opening of the grid face to install or remove filter becomes easy and convenient.

1 . A fastening means of air grille includes a grid face, a filtering device, a stationary frame and door latches, in which said grid face is hinged to the stationary frame with one side, and the opposite side of the grid face is fastened on the stationary frame with the door latches; wherein said door latches molded of plastic is located on the grid face in movable connection with a catching hook at the middle portion; a pushing portion is built upon the upside of the door latch, and a L-shaped catching shoe on the lower portion, above the L-shaped catching shoe the catching hook is built up for holding the grid face on, and an open slot constructed of the low leg of the L-shaped shoe and the bottom of said pushing portion is used to catch on the stationary frame.  
   
   
       2 . A fastening means of air grille as claimed in  claim 1 , wherein said open slot possesses two opposite teeth built on the inside approaching to the open end.  
   
   
       3 . A fastening means of air grille as claimed in  claim 1 , wherein said grid face possesses locating slots for retaining the door latch in, and said door latch can slide along the slot, coordinating to the locating slots there are locating holes built upon the stationary frame.  
   
   
       4 . A fastening means of air grille as claimed in  claim 3 , wherein said stationary frame possesses a catching hole built upon one side and keeping a space to each catching hole.  
   
   
       5 . A fastening means of air grille as claimed in  claim 1  wherein the pushing portion of said door latch is wider than width of the locating slot of the grid face, and the catching shoe is narrower than the width of the locating slot of the grid face.  
   
   
       6 . A fastening means of air grille as claimed in  claim 3  wherein the pushing portion of said door latch is wider than width of the locating slot of the grid face, and the catching shoe is narrower than the width of the locating slot of the grid face.  
   
   
       7 . A fastening means of air grille as claimed in  claim 1  wherein said open slot of the catching shoe is wider than or equal to the thickness of wall of the stationary frame.  
   
   
       8 . A fastening means of air grille as claimed in  claim 3  wherein said open slot of the catching shoe is wider than or equal to the thickness of wall of the stationary frame.  
   
   
       9 . A fastening means of air grille as claimed in  claim 1  wherein the distance between both teeth built on the open ends of the open slot is smaller than the thickness of the side wall of the stationary frame.  
   
   
       10 . A fastening means of air grille as claimed in  claim 8  wherein the distance between both teeth built on the open ends of the open slot is smaller than the thickness of the side wall of the stationary frame.  
   
   
       11 . A fastening means of air grille claimed in  claim 1 , wherein the pushing portion of said door latch possesses a curved surface coordinating to the finger pad.  
   
   
       12 . A fastening means of air grille as claimed in  claim 1 , wherein the curved surface of the pushing portion is fabricated with rough-plane for facilitating to anti-skid touching.