Protective casing portable handheld electronic device

Abstract

The protective casing for portable handheld electronic devices comprises an inner casing snugly covering a back and edges of the electronic device, and an outer frame placed around the edges of the electronic device for tightly pressing part of the inner casing against the edges of the electronic device. The resultant protective casing is of improved protective characteristics, durability, convenience of use, and functionalities without compromising aesthetics.

1 . A protective casing for a portable handheld electronic device, comprising:
 an inner casing snugly covering a back and edges of the electronic device;   an outer frame placed around the edges of the electronic device for tightly pressing part of the inner casing against the edges of the electronic device.   
     
     
         2 . The protective casing according to  claim 1 , wherein the inner casing comprises a substrate and an endless sidewall extending upwards from the substrate in which the height of the sidewall is the same as or slightly larger than the thickness of the electronic device, while the outer frame is shaped and structured as a ring in which the height of the outer frame is the same as or slightly larger than the thickness of the electronic device. 
     
     
         3 . The protective casing according to  claim 2 , wherein upper and lower edges of the outer frame slightly extend inward towards an inner of the outer frame comparing to a middle part of the outer frame. 
     
     
         4 . The protective casing according to  claim 3 , wherein a flange is formed around the endless sidewall of the inner casing at a lower side of the latter. 
     
     
         5 . The protective casing according to  claim 2 , wherein a flange is formed around the endless sidewall of the inner casing at a lower side of the latter. 
     
     
         6 . The protective casing according to  claim 2 , wherein a crocodile skin-like texture is formed on an outer surface of the substrate of the inner casing. 
     
     
         7 . The protective casing according to  claim 1 , wherein the inner casing and the outer frame are provided with matching openings for external access to buttons, switches and ports on the electronic device. 
     
     
         8 . The protective casing according to  claim 7 , further comprising a plurality of plugs for inserting into the matching openings. 
     
     
         9 . The protective casing according to  claim 2 , wherein the inner casing and the outer frame are provided with matching openings for external access to buttons, switches and ports on the electronic device. 
     
     
         10 . The protective casing according to  claim 9 , further comprising a plurality of plugs for inserting into the matching openings.