Patent ID: 6846230

Claim:
A hand power tool for surface machining, with a vibrating plate ( 12 ; 12 ′), which is suspended on the underside of a housing ( 10 ; 10 ′) by means of elastic vibrating elements ( 11 ) and is for the attachment of a grinding tool, with an eccentric drive ( 17 ), which is contained in the housing ( 10 ; 10 ′) and sets the vibrating plate ( 12 ; 12 ′) into an orbital oscillating motion and which has a drive shaft ( 18 ) driven by an electric motor ( 25 ) and an eccentric pin ( 21 ), which is coupled to the vibrating plate ( 12 ; 12 ′) rotatably in relation to the vibrating plate ( 12 ; 12 ′) and is connected to the drive shaft ( 18 ) in an eccentric, non-rotatable fashion, characterized in that coupling point ( 30 ) is situated between the eccentric pin ( 21 ) and the vibrating plate ( 12 ; 12 ′), close to an one edge ( 121 ) of the vibrating plate ( 12 ; 12 ′), and the elastic vibrating elements ( 11 ) engage the vibrating plate ( 12 ; 12 ′) close to the opposite edge ( 122 ) of the vibrating plate ( 12 ; 12 ′), and that the vibrating plate ( 12 ; 12 ′) is affixed to the housing ( 10 ; 10 ′) in the region between the coupling point ( 30 ) and the engagement points ( 31 ) of the vibrating elements ( 11 ) on the vibrating plate ( 12 ; 12 ′) by means of a movement transmission mechanism ( 32 ), which is flexurally flexible at one end and is designed so that the orbital motion at the coupling point ( 30 ) produces a reverse orbital motion at the engagement points ( 31 ), wherein the edge ( 121 ) close to the coupling point ( 30 ) is the front edge of the vibrating plate ( 12 ; 12 ′) in the working position and the edge close to the engagement points ( 31 ) of the vibrating elements ( 11 ) is the rear edge ( 122 ) of the vibrating plate ( 12 ; 12 ′) in the working position.