View angle adjustment mechanism in view device

A view angle adjustment mechanism for a view device, the view angle adjustment mechanism being configured to support a view element tilting section holding a view element by a tilting support section via a pivot, so as to be capable of adjusting a view angle of the view element, wherein:

• the pivot is assembled by forcible fitting between a pivot convex and a pivot concave;
• the pivot convex includes a spherical surface;
• the pivot concave includes:
• a first surface portion, a second surface portion and a third surface portion;
• wherein the first surface portion is defined by a first conical surface area having a full circular conic section that extends around a center axis of the pivot concave, the second surface portion is defined by a second conical surface area having a full circular conic section that extends around the center axis of the pivot concave, and the third surface portion is defined by an intermediate surface area extending between the first conical surface area and the second conical surface area in a direction of the center axis of the pivot concave, wherein the first conical surface area and the second conical surface area are arranged so as to face in respective directions opposite to each other along the center axis of the pivot concave;
• and
• the spherical surface of the pivot convex is inscribed in the first conical surface area and the second conical surface area of the pivot concave.