TECHNICAL FIELD

The present invention relates to a lens unit.

BACKGROUND ART

Allowing users to experience desired lenses have been conducted by attaching a frame member without a lens to a lens that is independent of the frame member and is detachable to the frame member, and letting the users wear the frame member. Such a frame member is referred to as an optometric frame, a trial frame, a test frame, or a universal frame. Such a lens is referred to as an optometric lens, a trial lens, and/or the like.

PTL 1 discloses an optometric lens using a bifocal, multifocal, or progressive refractive index lens.

In recent years, an eyewear including a lens having an electric element has been used for various use. For example, PTL 2 discloses an eyewear including a liquid crystal lens whose refractive index changes.

When using the lens having the electric element, it is necessary to supply electric power to the electric element. In the eyewear disclosed in PTL 2, a conductive path for electrically connecting between an electric power source provided at the end of a temple and an electrical contact disposed along the upper edge of a lens is provided inside the temple and a frame.

CITATION LIST

Patent Literature

PTL1Japanese Patent Application Laid-Open No. 2004-358250 PTL 2Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. 2015-522842

SUMMARY OF INVENTION

Technical Problem

There is a request to let the user experience the change in the viewing way due to the drive of the electric element by attaching the optometric lens having the electric element to the frame member and letting the user wear the frame member. However, since the optometric lens is independent of the frame member, the path for electrically connecting between the electric power source and the electric element cannot be disposed inside the frame or the temple, like the eyewear disclosed in PTL 2,

In view of the above circumstances, it is an object of the present invention to provide a lens unit independent of a frame member, the lens unit including an electric element and means for supplying electric power to the electric element.

Solution to Problem

The lens unit according to the present invention includes: a lens unit, comprising: a lens having an electrical element; a rim portion covering a peripheral edge portion of the lens; a control unit for controlling the electrical element; an electric power supply unit for supplying electric power to the electrical element; a conductive portion being disposed between the rim portion and the peripheral edge portion of the lens and electrically connecting between an end portion of an electrode of the electrical element and the control unit, the end portion of the electrode being exposed to the peripheral edge portion; and a knob portion protruding from the lens or the rim portion.

Advantageous Effects of Invention

According to the present invention, there is provided a lens unit independent of a frame member, the lens unit having an electric element and means for supplying electric power to the electric element.

