MAGNETIC FIXATION DEVICE AND ITS ASSEMBLY METHOD

PURPOSE:To facilitate assembly by engaging a base member to the end portion of a magnet so that a projecting portion may be extended within the parallel surface of the inner cavity opening side end surface of a magnetic block, and fitting a plate to the magnetic block inner cavity opening side end surface with its hole made to be coaxial with the inner cavity. CONSTITUTION:A permanent magnet 32 is rotatably arranged within the inner cavity 30 of a magnetic block 22 with its recessed portion 34 arranged with an elastic body 92, and the projecting portion 60 of a base member 54 is put into the recessed potion 34 of the permanent magnet 32, and a plate 36 is fitted to the end surface of the magnetic block 22 by means of screws 38 so that the main body portion 56 and the projecting portion 58 of the base member 54 may be received at the hole 40 and the recessed portion 42 of the plate 36. The base member 54 is rotatable within a range where a projecting portion 62 is engaged with a projecting portion within the recessed portion 42 of the plate 36, and the permanent magnet 32 and the base member 54 never come off the magnetic circuit block 22 as the projecting portion 58 of the base member 54 butts the plate 36. At the time of assembly, a bonding agent is put into the recessed portion 64 of the base member 54, and the projecting portions 82, 84 of a knob member 75 are put into the hole and the recessed portion 64 of the base member 54, and the knob member 76 and the base member 54 are united.