To provide a magnetic encoder capable of appropriately detecting magnetic forces.
The magnetic encoder 16 includes both a ring-like multi-pole magnet 23 in which magnetic poles are alternately arranged in its circumferential direction and a slinger 24 for housing the multi-pole magnet 23. The multi-pole magnet 23 includes both magnetic powder and a resin. The multi-pole magnet 23 is produced by a magnetic field injection molding machine for multipole magnets, which is provided with a metal mold part including metal molds constituting a cavity, which forms an external shape; an injection part for injecting a magnet material into the cavity; a coil for generating magnetic fields in axial directions in the metal mold part when the injection part injects the magnet material into the cavity; and a cooling part for cooling the coil, while generating magnetic fields in axial directions at the time of injection molding and cooling the coil.
| JP2006313117A | 2006-11-16 | |||
| JPS62190329A | 1987-08-20 | |||
| JPS61134030A | 1986-06-21 |
Morishita Hachiro
Hiroyuki Yoshida
Next Patent: INDICATION DEVICE AND INDICATION METHOD