Method for production imaging lens unit

摘要

Method for manufacturing an image pickup lens unit. In the second molding step, by performing additional molding with respect to a first holder member 20 in which a lens 10 has been inserted, the separation of the lens 10 can be prevented and, at the same time, a second holder member 30 welded to the first holder member 20 can be molded. Therefore, molding of the second holder member 30 and the process of joining the second holder member with the first holder member 20 can be performed together. Additionally, when the lens 10 is fixed from the side of a third molding portion 63 of a second mold 52, the lens 10 and the third molding portion 63 are brought in contact by an elastic biasing force, thereby reducing breakage or deformation of the lens 10.

主权项

1. A method for manufacturing an image pickup lens unit including a lens having a first surface on which a first optical surface is formed and a second surface on which a second optical surface is formed on the opposite side of the first surface, a first holder member, and a second holder member configured to hold the lens so as to store the lens in cooperation with the first holder member, the method comprising:
a first molding step of filling in a resin material in a mold and molding the first holder member having a positioning portion that is in contact with the second surface of the lens; a positioning step of inserting the lens in the first holder member present in the mold, and positioning the lens by bringing the lens in contact with the positioning portion of the first holder member; and a second molding step of bringing the lens and the mold in contact by an elastic biasing force at a time of fixing the lens from a side of mold, filling in a resin material in the mold when the lens has been positioned and fixed with respect to the first holder member, and then molding the second holder member such that the second holder member is welded to the first holder member placed inside the mold and having the lens positioned therein, the second holder member being configured to prevent the lens from falling off.