Power tool

Abstract

A first recess and protrusion engagement portion and a second recess and protrusion engagement portion making a fan guide and one end portion of a leg swingably abut on each other and making a base plate and the other end portion of the leg swingably abut on each other, respectively, and restricting a deviation of the leg relative to the fan guide and the base plate in a horizontal direction while allowing swinging of the leg relative to the fan guide and the base are provided between the fan guide and the one end portion and between the base plate and the other end portion, respectively. The leg can swing with almost no resistance without involving any elastic deformation during the orbital motion of the base, and stress to cause elastic deformation is not applied to the leg unlike the conventional art.

What is claimed is: 
     
         1 . A power tool comprising:
 a main body part having a driving source;   a rotation shaft provided in the driving source;   abase moving in an approximately circular motion with respect to the main body part in a horizontal direction along with rotation of the rotation shaft;   a polishing sheet held by the base;   a post provided between the main body part and the base; and   recess and protrusion engagement portions provided between the main body part and one end portion of the post and between the base and the other end portion of the post, respectively, making the main body part and the one end portion swingably abut on each other and making the base and the other end portion swingably abut on each other, respectively, and restricting a deviation of the post relative to the main body part and the base in a horizontal direction while allowing swinging of the post relative to the main body part and the base.   
     
     
         2 . The power tool according to  claim 1 ,
 wherein the recess and protrusion engagement portions are composed of spherical protrusion portions or spherical recess portions provided on the main body part and the base, respectively, and spherical recess portions or spherical protrusion portions provided on the one end portion and the other end portion, respectively.   
     
     
         3 . The power tool according to  claim 2 ,
 wherein radii of the spherical protrusion portions are set to be smaller than radii of the spherical recess portions.