Title:
MINUS DRIVER WITH SIDE SLIP PREVENTION PROJECTION
Document Type and Number:
Japanese Patent JP2020040142
Kind Code:
A
Abstract:
To provide a driver and a screw which do not occur side slip.SOLUTION: A needle-like projection is provided at a center of a blade tip of a flat minus driver. A bottom of a slot on a head groove of a minus screw has fine irregularities. The needle-like projection of the minus driver blade tip captures the fine irregularities at a groove bottom part of the minus screw head bottom, and serves as a slip-resistant spike. The minus driver having the needle-like projection with function of the slip-resistant spike at the blade tip performs screw fastening work or screw loosening work without occurrence of reduction of lateral displacement of screw head groove with respect to the slot. Therefore, a rotation axis of the minus driver can be so kept as to be same as a rotation axis of the minus screw, and this minus driver can realize workability equal to that of a plus driver while keeping advantages of a minus driver.SELECTED DRAWING: Figure 1
Inventors:
KUDO TAIJI
Application Number:
JP2018168011A
Publication Date:
March 19, 2020
Filing Date:
September 07, 2018
Export Citation:
Assignee:
KUDO TAIJI
International Classes:
B25B15/00