US 12,234,850 B2
Fastening structure and object detection device including fastening structure
Atsuko Sasaki, Otsu (JP); Hiroyuki Tomooka, Otsu (JP); and Michinori Noguchi, Otsu (JP)
Assigned to OPTEX CO., LTD., Shiga (JP)
Filed by OPTEX CO., LTD., Shiga (JP)
Filed on Nov. 30, 2021, as Appl. No. 17/456,903.
Claims priority of application No. 2021-122766 (JP), filed on Jul. 27, 2021.
Prior Publication US 2023/0036003 A1, Feb. 2, 2023
Int. Cl. F16B 21/02 (2006.01)
CPC F16B 21/02 (2013.01) 8 Claims
OG exemplary drawing
 
1. A fastening structure for fastening one member and another member via a fastening member provided to the one member, the fastening structure comprising:
a fitting portion having a fitting hole in the one member; and
a to-be-fitted portion having a to-be-fitted hole in the other member;
the fastening member being inserted into the fitting hole and configured to fit the fitting portion and the to-be-fitted portion to each other by being inserted into the to-be-fitted hole, wherein
the fastening member has,
a trunk portion having a cylindrical or columnar shape, between one end and another end of the fastening member,
a tool groove at the one end,
a come-off prevention portion at the other end, the come-off prevention portion having a greater radius in a cross-section thereof than a radius in a cross-section of the trunk portion, and
a helical protrusion at a part of the trunk portion,
the fitting portion has a helical groove configured to be screwed with the helical protrusion,
a radius of the fitting hole is less than the radius of the come-off prevention portion, and a radius of the to-be-fitted hole is not less than the radius of the come-off prevention portion, and
the helical protrusion is releasable from a screwed state with the helical groove so the fastening member is freely rotatable within the fitting hole when the one member and the another member are not fastened to each other.