Lens Barrel, Image Acquiring Unit, And Method For Assembling Same

A lens barrel comprising:

• a lens which images an image of a subject;
• and
• a lens frame which holds the lens inside,
• wherein,
• the lens frame includes:
• a cylinder body component with a structure opened at a tip and an end;
• and
• a lens base component which fixes the lens and which is adhered and fixed to a tip opening of the cylinder body component to store the lens inside the cylinder body component;
• the lens base component includes:
• a tip base portion including an opening which exposes a tip side optical surface of the lens and an inner side surface which supports the lens in a surrounding portion of the opening;
• and
• a full circle or arc shaped side wall portion provided standing from the tip base portion in an axis direction;
• the inner side surface of the side wall portion is formed along an outer circumferential surface of the lens;
• the inner side surface and the outer circumferential surface are brought together and adhered to each other;
• at least a portion of the upper surface of the side wall portion is provided in a position toward an end side separated from the far end of the lens to be exposed to the inside of the cylinder body component, comes into contact with a tip surface edge of a member with a larger diameter than the lens inserted from an end opening of the cylinder body component, and composes a positioning surface to determine a position of an axis direction of the member;
• and
• the lens is provided in a position shifted from a central axis of an inserting portion in which the member of the cylinder body component is inserted and the positioning surface is provided in a side opposite of the side that the lens is shifted.