US 12,360,355 B2
Optical device and method of manufacturing tubular part-using product
Kensuke Sakai, Nagano (JP); Masaki Imai, Nagano (JP); and Hidemi Oguchi, Nagano (JP)
Assigned to LIGHT OPTICAL WORKS, LTD., Nagano (JP)
Filed by LIGHT OPTICAL WORKS, LTD., Nagano (JP)
Filed on Oct. 31, 2021, as Appl. No. 17/515,537.
Claims priority of application No. 2021-004758 (JP), filed on Jan. 15, 2021.
Prior Publication US 2022/0229281 A1, Jul. 21, 2022
Int. Cl. G02B 23/16 (2006.01); F41G 1/38 (2006.01); G02B 25/00 (2006.01)
CPC G02B 23/16 (2013.01) [F41G 1/38 (2013.01); G02B 25/001 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical device, which is an optical device enabling a user to visually recognize a target object, comprising:
an optical system that enables the user to visually recognize the target object;
a housing that houses the optical system; and
an operation adjusting part that adjusts a function of the optical device according to an operation of the user,
wherein the operation adjusting part comprises:
a rotating operation part that rotates according to an operation of the user;
an adjusting mechanism that adjusts the function of the optical device by moving a part of the optical device according to an amount of rotation of the rotating operation part;
a first tubular part in a tubular shape, formed with recesses-projections on at least a part of an outer peripheral surface; and
a second tubular part in a tubular shape, formed with inner peripheral recesses-projections on at least a part of an inner peripheral surface, the inner peripheral recesses-projections being recesses-projections having a shape that engages with outer peripheral recesses-projections which are the recesses-projections on the outer peripheral surface of the first tubular part,
wherein a rotating side tubular part, which is one of the first tubular part and the second tubular part, has an axial direction parallel to a rotation axis of the rotating operation part and has a position fixed to the rotating operation part to rotate together with the rotating operation part,
another of the first tubular part and the second tubular part has an axial direction aligned with the rotating side tubular part and is arranged at a position fixed to the housing,
the outer peripheral recesses-projections of the first tubular part are recesses-projections of which projections and recesses extending in a direction parallel to an axial direction of the first tubular part are alternately arranged in a circumferential direction of the outer peripheral surface,
the rotating operation part is capable of moving forward and backward in a direction parallel to the axial direction of the first tubular part, and according to an operation of the user, moves together with the rotating side tubular part to at least a rotatable position at which rotation of the rotating operation part is made possible by separation between the outer peripheral recesses-projections and the inner peripheral recesses-projections, and a rotation prohibited position at which rotation of the rotating operation part is prohibited by engagement between the outer peripheral recesses-projections and the inner peripheral recesses-projections, and
at least in a vicinity of an end part on a side close to the second tubular part, a width of the projection of the outer peripheral recesses-projections of the first tubular part gradually decreases toward the end part,
wherein at least in the vicinity of the end part on the side close to the second tubular part, a depth and a width of the recess of the outer peripheral recesses-projections of the first tubular part gradually increase toward the end part.