| 摘要 |
<p>PURPOSE:To enable this device to be incorporated also in a vibrating device to spread the range of its usage, by jointing a moving-iron piece with a yoke by means of a pin and by fitting both ends of a torsional coil spring to the moving-iron piece and to the yoke and by making composition of the iron piece energized in the returning direction. CONSTITUTION:An iron piece 31 is mounted rotatably and facing to an iron core 10 of an electromagnet 1, at a top end of a yoke 2 placed on the electromagnet 1. An iron piece 21 is attracted and returned by the iron core 10 in accordance with excitation and demagnetization of the electromagnet 1. In this case, the iron piece 31 is jointed with the yoke 2 by means of a pin, and both end parts of a torsional coil spring 47 mounted in the vicinity of this joint part are respectively fitted to the iron piece 31 and the yoke 2, and then the iron piece 31 is energized in the returning direction. Hence, the vacant spacial part can be formed at the rear part of the yoke, without requiring many spacers, so that this part becomes available for effective usage in such that the operational part linked with the moving iron-piece 11 is disposed there.</p> |
