Drilling Device
First Claim
1. A drilling device including:
- a housing having a rear end portion and a front end portion to which an end bit is detachably attachable, the end bit being configured to form a bore in a workpiece;
a drive power source accommodated in the housing; and
a power transmission mechanism transmitting a driving force generated in the power source to the end bit;
characterized bya distance sensor provided at the housing and configured to measure a distance from the distance sensor to a surface of the workpiece, characterized in thatthe distance sensor provides an effective measurement range capable of performing a measurement of a distance within a predetermined margin of error, as long as the surface of the workpiece positioned ahead of the housing is spaced away from the distance sensor within a predetermined region; and
the relationship of L1≦
Ls and Ls+Lb≦
L2 is satisfied where Ls represents a distance in a frontward/rearward direction between a front end of the housing and the distance sensor, Lb represents a distance in the frontward/rearward direction between the front end of the housing and a tip end of the end bit, L1 represents the a distance in the frontward/rearward direction between the distance sensor and a point closest to the distance sensor and defining a lower limit of the effective measurement range, and L2 represents a distance in the frontward/rearward direction between the distance sensor and a point farthest from the distance sensor and defining an upper limit of the effective measurement range.
1 Assignment
0 Petitions
Accused Products
Abstract
A drilling device drilling to a desired depth without a gauge. The drilling device includes a distance sensor positioned on an imaginary line spanning between a front end of the housing and a hand gripped portion. The distance sensor is away form a front end of a gear housing by a distance Ls. The distance sensor provides an effective measurement range. The relationship of L1≦Ls and Ls+Lb≦L2 is satisfied where L1 represents a distance between the distance sensor and a point closest to the distance sensor and defining a lower limit of the effective measurement range, L2 represents a distance between the distance sensor and a point farthest from the distance sensor and defining an upper limit of the effective measurement range, and Lb represents a distance between the front end of the housing and a tip end of the end bit.
18 Citations
7 Claims
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1. A drilling device including:
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a housing having a rear end portion and a front end portion to which an end bit is detachably attachable, the end bit being configured to form a bore in a workpiece; a drive power source accommodated in the housing; and a power transmission mechanism transmitting a driving force generated in the power source to the end bit;
characterized bya distance sensor provided at the housing and configured to measure a distance from the distance sensor to a surface of the workpiece, characterized in that the distance sensor provides an effective measurement range capable of performing a measurement of a distance within a predetermined margin of error, as long as the surface of the workpiece positioned ahead of the housing is spaced away from the distance sensor within a predetermined region; and the relationship of L1≦
Ls and Ls+Lb≦
L2 is satisfied where Ls represents a distance in a frontward/rearward direction between a front end of the housing and the distance sensor, Lb represents a distance in the frontward/rearward direction between the front end of the housing and a tip end of the end bit, L1 represents the a distance in the frontward/rearward direction between the distance sensor and a point closest to the distance sensor and defining a lower limit of the effective measurement range, and L2 represents a distance in the frontward/rearward direction between the distance sensor and a point farthest from the distance sensor and defining an upper limit of the effective measurement range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification