Pad for sander and pad

Abstract

A pad for a sander includes a flat surface for attaching sanding paper. The pad further includes a side surface including a first portion having a first angle as an inclination angle with respect to the flat surface, and a second portion having a second angle smaller than the first angle as the inclination angle.

What is claimed is: 
     
         1 . A pad for a sander, the pad comprising:
 a flat surface for attaching sanding paper; and   a side surface including a first portion having a first angle as an inclination angle with respect to the flat surface, and a second portion having a second angle smaller than the first angle as the inclination angle.   
     
     
         2 . The pad according to  claim 1 , wherein the pad has a generally triangular outer shape as viewed in a direction perpendicular to the flat surface, and
 the first portion is formed on at least one of three corner portions respectively containing three vertexes of the generally triangular shape.   
     
     
         3 . The pad according to  claim 2 , wherein the pad has a generally triangular outer shape having two relatively long sides and one relatively short side as viewed in the direction perpendicular to the flat surface, and
 the first portion is formed at least on a corner portion containing a vertex between the two relatively long sides.   
     
     
         4 . The pad according to  claim 2 , wherein the first portion is formed on a corner portion having an angle equal to or smaller than 90 degrees as viewed in the direction perpendicular to the flat surface. 
     
     
         5 . The pad according to  claim 2 , wherein the second portion is formed on at least one of three side edge portions located between the three corner portions. 
     
     
         6 . The pad according to  claim 1 , wherein the side surface includes a transition portion connecting the first portion and the second portion in such a manner that the inclination angle gradually changes from the first angle to the second angle. 
     
     
         7 . The pad according to  claim 1 , wherein, when H is defined to represent a thickness of the pad in the direction perpendicular to the flat surface and L is defined to represent a protruding distance of a distal edge from a proximal edge of the inclination of the second portion as viewed in the direction perpendicular to the flat surface, a ratio L/H is equal to or higher than 0.5 and equal to or lower than 2.5. 
     
     
         8 . A sander comprising:
 the pad according to  claim 1 .   
     
     
         9 . A sander comprising:
 the pad according to  claim 1 ,   a motor;   a base having a shape and a size corresponding to the outer shape of the pad and smaller than the pad as viewed in the direction perpendicular to the flat surface, the base being coupled with a portion opposite from the flat surface of the pad and configured to perform a sanding motion together with the pad by a driving force of the motor,   wherein the base includes a side surface inclined in the same direction as the side surface of the pad at least on a portion corresponding to the second portion.   
     
     
         10 . The sander according to  claim 9 , wherein the inclination angle of the side surface of the pad is smaller than an inclination angle of the side surface of the base with respect to the flat surface. 
     
     
         11 . The pad according to  claim 3 , wherein the second portion is formed on at least one of three side edge portions located between the three corner portions. 
     
     
         12 . The pad according to  claim 2 , wherein the side surface includes a transition portion connecting the first portion and the second portion in such a manner that the inclination angle gradually changes from the first angle to the second angle. 
     
     
         13 . The pad according to  claim 2 , wherein, when H is defined to represent a thickness of the pad in the direction perpendicular to the flat surface and L is defined to represent a protruding distance of a distal edge from a proximal edge of the inclination of the second portion as viewed in the direction perpendicular to the flat surface, a ratio L/H is equal to or higher than 0.5 and equal to or lower than 2.5. 
     
     
         14 . The pad according to  claim 3 , wherein the side surface includes a transition portion connecting the first portion and the second portion in such a manner that the inclination angle gradually changes from the first angle to the second angle. 
     
     
         15 . The pad according to  claim 3 , wherein the second portion is formed on at least one of three side edge portions located between the three corner portions, and
 the side surface includes a transition portion connecting the first portion and the second portion in such a manner that the inclination angle gradually changes from the first angle to the second angle.   
     
     
         16 . The pad according to  claim 3 , wherein the second portion is formed on at least one of three side edge portions located between the three corner portions, and
 when H is defined to represent a thickness of the pad in the direction perpendicular to the flat surface and L is defined to represent a protruding distance of a distal edge from a proximal edge of the inclination of the second portion as viewed in the direction perpendicular to the flat surface, a ratio L/H is equal to or higher than 0.5 and equal to or lower than 2.5.   
     
     
         17 . The pad according to  claim 3 , wherein the second portion is formed on at least one of three side edge portions located between the three corner portions,
 the side surface includes a transition portion connecting the first portion and the second portion in such a manner that the inclination angle gradually changes from the first angle to the second angle, and   when H is defined to represent a thickness of the pad in the direction perpendicular to the flat surface and L is defined to represent a protruding distance of a distal edge from a proximal edge of the inclination of the second portion as viewed in the direction perpendicular to the flat surface, a ratio L/H is equal to or higher than 0.5 and equal to or lower than 2.5.   
     
     
         18 . A sander comprising:
 the pad according to  claim 2 ,   a motor;   a base having a shape and a size corresponding to the outer shape of the pad and smaller than the pad as viewed in the direction perpendicular to the flat surface, the base being coupled with a portion opposite from the flat surface of the pad and configured to perform a sanding motion together with the pad by a driving force of the motor,   wherein the second portion is formed on at least one of three side edge portions located between the three corner portions, and   the base includes a side surface inclined in the same direction as the side surface of the pad at least on a portion corresponding to the second portion.   
     
     
         19 . The sander according to  claim 18 , wherein the inclination angle of the side surface of the pad is smaller than an inclination angle of the side surface of the base with respect to the flat surface.