Electric drill
OwnerKazuhiro Yamamotoinventor
Life of this patent
Estimating the term…
Abstract
An electric drill having a function for preventing drilling of unexpected oblique hole. Further in the electric drill, when the direction of drilling is displaced in drilling work using the electric drill, it is sensed automatically to stop the drilling. The electric drill (1) performs drilling in the direction perpendicular a workpiece (7) and have a tilt sensor (10) mounted on a tilt sensor mounting surface (8) defined in parallel to the ground surface. When the rotation axis (C) of the drill positioned perpendicular to the surface of the workpiece is tiled to an angle equal to or greater than a predetermined angle, the tilt sensor (10) senses the tilt shutoff a drive current of the electric drill.
Claims7
An electric drill for boring a hole on a surface of a workpiece material at α degree of a predetermined angle relative to the surface of the workpiece material positioned at θ degree of an arbitrary angle relative to a horizontal plane, comprising:
- an inclination sensor mounted on the electric drill for detecting an inclination of the electric drill relative to the horizontal plane;
- means for positioning the inclination sensor in the horizontal plane at the start of boring the hole;
- and
- means for interrupting a drill drive current if the inclination sensor detects that a rotation axis of the electric drill is tilted over a predetermined angle relative to a boring direction set at the start of boring the hole.
Dependencies are inferred from the claim text.