Sink drain hole structure

Abstract

A sink drain hole structure, which can be more securely connected with a drain by a connector without loosening. The sink drain hole structure includes a sink main body formed of a rigid wall and a drain hole integrally formed with the sink main body. The drain hole is defined with a horizontal reference axis and a vertical reference axis. The drain hole has an edge section in the direction of the horizontal reference axis for supporting and connecting with a drain (or a drain pipe), a connection section extending from the edge section in the direction of the vertical reference axis and a terminal section (or folding edge) extending from the connection section in the direction of the horizontal reference axis. The terminal section overlaps at least a part of the edge section to form a double-layered structure defining an elastic space.

What is claimed is: 
     
         1 . A sink drain hole structure comprising a sink main body formed of a rigid wall and a drain hole integrally formed with the sink main body, the sink main body having a basin in communication with the drain hole, the drain hole being defined with a horizontal reference axis, a vertical reference axis and a central area, the drain hole having an edge section in the direction of the horizontal reference axis for supporting and connecting with a drain, a connection section extending from the edge section in the direction of the vertical reference axis and a terminal section extending from the connection section in the direction of the horizontal reference axis, the terminal section having a tail end, the terminal section overlapping at least a part of the edge section to form a double-layered structure defining an elastic space. 
     
     
         2 . The sink drain hole structure as claimed in  claim 1 , wherein the tail end leans against the edge section. 
     
     
         3 . The sink drain hole structure as claimed in  claim 1 , wherein the connection section of the drain hole is an arched turning structure with a U-shaped cross section. 
     
     
         4 . The sink drain hole structure as claimed in  claim 1 , wherein the connection section extends from the edge section toward the central area of the drain hole in the direction of the vertical reference axis. 
     
     
         5 . The sink drain hole structure as claimed in  claim 1 , wherein the terminal section is normally forced to store energy and tends to release the energy in the direction of the vertical reference axis. 
     
     
         6 . The sink drain hole structure as claimed in  claim 4 , wherein the edge section is normally forced to store energy and tends to release the energy in the direction of the vertical reference axis. 
     
     
         7 . The sink drain hole structure as claimed in  claim 1 , wherein the terminal section partially attaches to a lower side of the edge section. 
     
     
         8 . The sink drain hole structure as claimed in  claim 1 , wherein the terminal section partially leans against a lower side of the edge section. 
     
     
         9 . The sink drain hole structure as claimed in  claim 1 , wherein the connection section is upward bent and the terminal section extends from the connection section in the direction of the horizontal reference axis to lean against the edge section, whereby the edge section, the connection section and the terminal section together define an elastic space. 
     
     
         10 . The sink drain hole structure as claimed in  claim 1 , wherein a drain is locked with the drain hole by means of a connector, the edge section, the connection section and the terminal section together defining an elastic space, when the connector presses the terminal section against the edge section, the elastic space providing a move range to store energy, whereby the terminal section is normally forced to store energy and tends to release the energy. 
     
     
         11 . The sink drain hole structure as claimed in  claim 1 , wherein the sink main body is made of a metal thin sheet by means of pressing and the metal sheet is integrally drawn and pressed to form the drain hole. 
     
     
         12 . A sink drain hole structure comprising a sink main body formed of a rigid wall and a drain hole integrally formed with the sink main body, the sink main body having a basin in communication with the drain hole, the drain hole being defined with a horizontal reference axis and a vertical reference axis, the drain hole having an edge section in the direction of the horizontal reference axis for supporting and connecting with a drain (or a drain pipe), the edge section being fitted in an enclosure body with a U-shaped cross section. 
     
     
         13 . The sink drain hole structure as claimed in  claim 12 , wherein the enclosure body encloses a part of the edge section. 
     
     
         14 . The sink drain hole structure as claimed in  claim 12 , wherein the enclosure body is made of plastic material. 
     
     
         15 . The sink drain hole structure as claimed in  claim 12 , wherein the enclosure body is made of elastic material. 
     
     
         16 . The sink drain hole structure as claimed in  claim 12 , wherein the sink main body is made of a metal thin sheet by means of pressing and the metal sheet is integrally drawn and pressed to form the drain hole.