| 摘要 |
PURPOSE:To reduce friction resistance by forming the shaft bearing surface of a pivot for a follow-up parmanent magnet, which follows up the revolution of a driving parmanent magnet rotated according to the quantity to be measured and momentarily rotates intermittently, in recessed sphare and making the interval between the pivot and shaft bearing surface narrow. CONSTITUTION:Although follow-up parmanent magnet 4 follows up the revolution of parmanent magnet 1 which is driven according to the quantity to be measured, revolutional energy is accumulated on spring 8 because ratchet 9b (or 9a) of driving disk 9 engages with timing cum 22 and driving disk 9 stops. When pinion cam 14 revolutes around a prescribed angle, the engagement between ratchet 9b (9a) and timing cam 16 is released and driving disk 9 is rotated by spring 8 in a moment, causing a pulse to generate by means of parmanent magnet 10 and a reed switch. Thus, friction resistance can be reduced by making interval G1 between pivot 5a of follow-up parmanent magnet 4 and recessed spherical shaft bearing surface 3b of shaft bearing part 3a narrow. |
