Patent ID: 9019378
Filing Date: 2015-04-28
Classification: G02B,H04N

Abstract:
1. An imaging apparatus comprising: a lens barrel which holds at least one optical element; an image sensor which converts an image of a photographic subject obtained by the optical element into an electrical signal; a circuit board on which the image sensor is mounted; a fixing wall body which is a different body from the lens barrel, and where the lens barrel is mounted to an end part of the fixing wall body on a photographic subject side, and the circuit board is mounted to an end part of the fixing wall body on a circuit board side opposite to the photographic subject side by a bond structure by an adhesive agent; and a front case part which is provided on a photographic subject side of the lens barrel, wherein in an intermediate part in an optical axis direction of the lens barrel on an outer circumferential surface of the lens barrel, a convex part that encircles the outer circumferential surface of the lens barrel is formed, a first screw thread is formed on the outer circumferential surface on the circuit board side opposite to the photographic subject side from the convex part of the lens barrel, a second screw thread that is screwed with the first screw thread is formed on an inner circumferential surface on the photographic subject side of the fixing wall body, and the lens barrel is screwed to a position where the convex part and the fixing wall body are in contact with each other, and is fixed, wherein an optical element holder in a ring shape which holds the optical element is provided in a part on the photographic subject side of the lens barrel, and a third screw thread is formed on an inner circumferential part of the optical element holder and a fourth screw thread is formed on the outer circumferential surface on the photographic subject side from the convex part of the lens barrel, and by screwing the third screw thread and the fourth screw thread, the optical element holder is fixed to the lens barrel, and the optical element is fixed to the lens barrel, wherein the convex part includes a front convex part and a rear convex part, the front and rear convex parts being disposed between the fourth screw thread formed on the photographic subject side from the convex part and the first screw thread formed on the circuit board side from the convex part, an outer diameter of the front convex part being smaller than an outer diameter of the rear convex part, and wherein each of positioning sections which performs positioning of the front case part and the fixing wall body in a direction of rotation centering on an optical axis of the optical element is provided in the front case part and the fixing wall body, respectively.