Optical distance-measuring device and electronic device

摘要

A lens frame, made from metal, retaining a light-emitting lens and a light-receiving lens is retained between a second mold and a third mold both of which are made from light-shielding resins. Anchors are formed by filling light-shielding resin for forming the third mold into fixing slots formed in an upper surface of the second mold and through holes formed in the lens frame. Since the lens frame is made from metal, thermal expansion of the lens frame is hardly caused by ambient temperature changes and self-heating. This causes little difference in the amount of change in difference between the lenses. Further, the lens frame is fixed with anchors between the second mold and the third mold. This suppresses the occurrence of sliding caused by difference in thermal expansion coefficient between the lens frame and the second and third molds.

主权项

1. An optical distance-measuring device that measures a distance to an object subject to distance measurement, comprising:
a light-emitting element mounted on a mounting member; a light-emitting lens that irradiates the object subject to distance measurement with light emitted from the light-emitting element; a light-receiving element, mounted on the mounting member, that detects a position of convergence of light reflected by the object subject to distance measurement; a light-receiving lens that causes the reflected light to converge onto the light-receiving element; light-transmitting resin members that causes the light-emitting element and the light-receiving element to be sealed therewith; a first light-shielding resin member that covers the light-transmitting resin member so as to form an interior space that allows the light emitted from the light-emitting element to reach the light-emitting lens and an interior space that allows the reflected light entered from the light-receiving lens to reach the light-receiving element; a lens frame, formed from the metal, that retains the light-emitting lens and the light-receiving lens; and a second light-shielding resin member that causes the first light-shielding resin member to be sealed therewith and retains the lens frame together with the first light-shielding resin member, the lens frame having through holes, one of the first light-shielding resin member and the second light-shielding resin member having projections that project toward the other resin member, the other resin member being connected with jutting parts of the respective projections in such a state that the projections pass through the corresponding through holes and jut from the lens frame.