Jan 20, 2026

US12529542 - Optical sighting device

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An optical sighting device 10 used by being installed to a firearm includes: an objective system part 12 , forming an inverted image of a target object on a first focal plane; and an erect system part 14 , forming an erect image obtained by reversing the inverted image on a second focal plane. The erect system 14 has: lenses 112 to 116 arranged between the first focal plane and the second focal plane; and a movable cylinder 134 as an erect system cylinder holding the lenses 112 to 116 . The adjustment mechanism 20 is a mechanism for adjusting tilting of an axial direction of the movable cylinder, and has: an advancing-retracting shaft 204 as an advancing-retracting member advancing and retracting on an end side of the movable cylinder 134 ; and a spring 206 as a double torsion spring biasing the movable cylinder 134 toward the advancing-retracting shaft 204.

Assignee: LIGHT OPTICAL WORKS, LTD.
Inventors: Kenichi Seki, Kan Hanaoka, Tsutomu Akiba

opticalsightingfirearmdevice

The patent describes an optical sighting device for firearms that includes an objective system to create an inverted image and an erect system to produce an upright image, along with an adjustment mechanism for tilting the erect system. This mechanism features a movable cylinder holding lenses and utilizes a double torsion spring to maintain proper alignment with an advancing-retracting member.

Claim 1

1 . An optical sighting device, installed to a firearm to be used, the optical sighting device comprising: an objective system part, forming an inverted image of a target object serving as a target of sighting on a first focal plane; an erect system part, forming an erect image obtained by reversing the inverted image on a second focal plane; and an adjustment mechanism, performing adjustment with respect to the erect system part, wherein the erect system part has: a lens, arranged between the first focal plane and the second focal plane; and an erect system cylinder, as a cylindrical body holding the lens, wherein the adjustment mechanism is a mechanism that performs adjustment to tilting an axial direction of the erect system cylinder, and has: an advancing-retracting member that advances and retracts on an end side of the erect system cylinder; and a double torsion spring, biasing the erect system cylinder toward the advancing-retracting member. an objective system part, forming an inverted image of a target object serving as a target of sighting on a first focal plane; an erect system part, forming an erect image obtained by reversing the inverted image on a second focal plane; and an adjustment mechanism, performing adjustment with respect to the erect system part, wherein the erect system part has: a lens, arranged between the first focal plane and the second focal plane; and an erect system cylinder, as a cylindrical body holding the lens, wherein the adjustment mechanism is a mechanism that performs adjustment to tilting an axial direction of the erect system cylinder, and has: an advancing-retracting member that advances and retracts on an end side of the erect system cylinder; and a double torsion spring, biasing the erect system cylinder toward the advancing-retracting member.

Google Patents

https://patents.google.com/patent/US12529542

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12529542