Corner fastening device

Abstract

A corner fastening device comprises a housing formed in once time and a W-type contacting surface formed by planes or cambered planes such that the present invention can be fastened to the different concave or convex fastening surfaces. Furthermore, the fastened device can be fastened on the housing of the present invention according to the receiving opening set on the housing.

What is claimed is:  
     
         1 . a corner fastening device comprising a housing formed in ones time as a main structure, a receiving opening set at one side of said housing, and a W-type contacting surface formed at another side opposite to the side having said receiving opening, said W-type contacting surface formed by a pair of first contacting surfaces and a second contacting surfaces following a way that one said first contacting surface, one said second contacting surface, another said second contacting surface and another first contacting surface are connected together successively in order, at least one position hole being set on each of said first contacting surfaces and said second contacting surfaces, at least one positioning column being set at both sides inside said housing in a direction of said receiving opening.  
     
     
         2 . a corner fastening device as recited in  claim 1 , wherein an opening is set at a lower part of said W-type contacting surface.  
     
     
         3 . a corner fastening device as recited in  claim 1 , wherein at least one said position holes set on said second contacting surfaces are arranged in a staggered way.  
     
     
         4 . a corner fastening device as recited in  claim 1 , wherein a flange is extended outward along a shape of said receiving opening.  
     
     
         5 . a corner fastening device as recited in  claim 1 , wherein a first included angle between the pair of said first contacting surfaces is 90 degrees in space.  
     
     
         6 . a corner fastening device as recited in  claim 1 , wherein the pair of said second contacting surfaces are connected successively and have a second included angle equal to 90 degrees.  
     
     
         7 . a corner fastening device as recited in  claim 1 , wherein a third included angle between said first contacting surface and said second contacting surface which are connected to each other is 90 degrees.  
     
     
         8 . a corner fastening device as recited in  claim 1 , wherein the pair of said second contacting surfaces are connected as a successive cambered surface.  
     
     
         9 . a corner fastening device as recited in  claim 1 , wherein the said first contacting surfaces form a successive cambered surface in space.  
     
     
         10 . a corner fastening device as recited in  claim 1 , wherein a locking hole is set on each of at least one said positioning columns.