Knife sharpener

Abstract

A knife sharpener may include an attachment unit, a metallic shell, a sharpener unit and a cover. The attachment unit comprises a base having a pad-sucker controlled by an operating handle. An extending base is connected at one end of the base and a space comprising a recessed portion is formed therein. A notch is formed on a top of the extending base for penetration. The sharpener unit comprises two fixing blocks, and each fixing block has a receiving portion for disposing with a first sharpening blade and a second sharpening blade respectively. The sharpener unit can provide both rough grinding and fine grinding by the difference of materials and formations of the first sharpening blade and the second sharpening blade.

1 . A knife sharpener comprising:
 an attachment unit having a base with a pad-sucker controlled by an operating handle, said pad-sucker operated by a stem penetrating a hole located at a central portion of the base and pivotally connecting with the operating handle which is moved in a groove located on the base; the operating handle eccentrically disposed against the base to pull out the pad-sucker to generate a vacuum suction force, wherein a spring is formed between the base and the pad-sucker; an extending base is connected at one end of the base; a space comprising a recessed portion is formed inside the extending base; and a notch formed on a top of the extending base for penetration;   a sharpener unit comprising two fixing blocks, wherein each fixing block has a receiving portion for receiving a first sharpening blade and a second sharpening blade respectively, and the first sharpening blade and the second sharpening blade are disposed in a V-shaped manner and extending from sharpening slots, wherein said sharpener unit is configured to provide both rough grinding and fine grinding through difference materials used in the first sharpening blade and the second sharpening blade; and a curved metallic shell with a plurality of curved opening aligned with the sharpening slots is disposed into the space of the extending base before the sharpener unit to cover the space and protect the sharpener unit; and   a cover having a connecting rod thereon to connect with the recessed portion of the extending base to secure the cover on a bottom of the extending base, and a bottom of the space is closed to provide a support for the sharpener unit.   
     
     
         2 . The knife sharpener of  claim 1 , wherein the recessed portion and the connecting rod are connected with each other as a nut and a screw. 
     
     
         3 . The knife sharpener of  claim 1 , wherein the recessed portion and the connecting rod are connected with each other as a fastening hole and a fastening block. 
     
     
         4 . The knife sharpener of  claim 1 , wherein the first sharpening blade is made of tungsten steel. 
     
     
         5 . The knife sharpener of  claim 1 , wherein the second sharpening blade is made of ceramic. 
     
     
         6 . The knife sharpener of  claim 1 , wherein an anti-slipping mat is mounted on a bottom of the cover.