Electromagnetically driven shutter device

Abstract

Abstract PURPOSE: To reduce the occupying space of the driving device by forming a yoke whose both ends are of arc form to sandwich form to sandwich permanent magnets and controlling the turning of a sector ring cooperating with the shutter through linear motion of a hollow box type coil. CONSTITUTION: A yoke 1 whose both ends are of arc form is formed by yokes 1a thru 1c which hold permanent magnets 2a and 2b, 2c and 2d generating magnetic fluxes in mutually opposite directions in sandwich form. A hollow box type coil 3 is provided to the linear part of the yoke 1. According to the current supplying direction, the coil 3 is electromagnetically driven and makes reciprocating linear motion along the yoke 1b. This motion is transmitted to a sector ring 5 through the bobbin cap 16 of the coil 3 and a driving pin 7, whereby the opening and closing of shutter blades 4 are controlled. This constitution reduces the size and weight of the electromagnetic driving device. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Yukio Ogawa
• 👤 Michiro Hirohata
• 👤 Tetsuya Taguchi

Bibliographic Details