US 12,405,458 B2
Open type fine-tuning sight
Jianhua Sun, Shaanxi (CN); and Meng Zhao, Shaanxi (CN)
Assigned to Huanic Corporation, Shaanxi (CN)
Appl. No. 17/768,203
Filed by Huanic Corporation, Shaanxi (CN)
PCT Filed Dec. 31, 2019, PCT No. PCT/CN2019/130841
§ 371(c)(1), (2) Date Apr. 11, 2022,
PCT Pub. No. WO2021/134629, PCT Pub. Date Jul. 8, 2021.
Prior Publication US 2024/0094520 A1, Mar. 21, 2024
Int. Cl. G02B 21/16 (2006.01); F41G 1/30 (2006.01); G02B 7/02 (2021.01); G02B 23/16 (2006.01)
CPC G02B 23/16 (2013.01) [F41G 1/30 (2013.01); G02B 7/023 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An open type fine-tuning sight, comprising a housing provided with a straight portion and a lens mounting frame provided at a front end of the straight portion, wherein the housing comprises an outer housing assembly and an inner housing assembly sleeved in the outer housing assembly;
the inner housing assembly is sleeved in an installation space at a front end of the outer housing assembly, and a front end of the inner housing assembly is connected to the front end of the outer housing assembly through a connecting rod assembly, the connecting rod assembly comprising two connecting rod groups, and the two connecting rod groups passing through the inner housing assembly and the outer housing assembly along a direction perpendicular to an axial direction of a base;
the inner housing assembly comprises the base and an arc-shaped lens mounting frame of which both ends spanned at left and right sides of a front end of the base;
the arc-shaped lens mounting frame is arranged in the lens mounting frame and is in clearance fit with the lens mounting frame;
the front end of the base is provided with two arc-shaped convex surfaces with arc-shaped end surfaces below inner connecting rod perforations through which the connecting rod groups of the connecting rod assembly passes, the two arc-shaped convex surfaces are respectively disposed on left and right sides of the axial direction of the base; inner sides of left and right ends of a bottom surface of the front end of the straight portion corresponding to the two arc-shaped convex surfaces are each provided with an arc-shaped concave surface to match with the arc-shaped convex surfaces; the left and right sides of the bottom surface of the front end of the straight portion are provided with outer connecting rod perforations corresponding to the inner connecting rod perforations and coaxial with the inner connecting rod perforations above the arc-shaped concave surface;
an end portion of the front end of the base is an arc-shaped protruding surface protruding outward, and the arc-shaped protruding surface is arranged in an arc-shaped inner concave surface of the bottom surface of the front end of the straight portion;
an elastic piece is provided between one side of a rear end of the base and an opposite side of the rear end of the straight portion, the elastic piece is configured to cooperate with a fine-tuning mechanism that passes through the other side of the rear end of the straight portion from an outside to an inside and is installed in the rear end of the base to adjust a lateral angle of the inner housing assembly;
a vertical return spring sleeved on a connecting screw is provided between the rear end of the base and the bottom surface of the straight portion to cooperate with the fine-tuning mechanism to adjust a pitch angle of the inner housing assembly;
the connecting screw is threadedly connected with a bottom surface of the base and being penetrated upward from the bottom surface of the straight portion.