Magnifying lens for binder notebook

Abstract

Abstract PURPOSE:To detach the magnifying lens without opening claws of a binder fitting by forming cuts extending from binder holes bored in a lens or lens frame for the binder notebook at necessary positions to the side edge part of the lens or lens frame. CONSTITUTION:A rectangular cut part 40 which is inscribed with a circular Fresnel lens 1 made of synthetic resin is provided on a base (lens frame) 4 made of flexible and transparent synthetic resin and the Fresnel lens 1 is fitted in the cut part 40. Further, a scale 5 for line drawing is printed at one side edge part 20 of the base 4 and six binder holes 3 are bored in the other side edge part 2; and thin cuts 30 extending from the side edge part 2 are provided to the top and bottom holes, and thin cuts 31 extending from the side edge part 2 are provided to four other holes 4. Consequently, the magnifying lens is easily detached by being drawn sideward without operating the binder at each time.

Inventors

• 👤 Toshihiko Okabe
• 👤 俊彦 岡部

Bibliographic Details