Vibration generator moving vibrator by magnetic field generated by coil and vibrator-mounted holder used in vibration-generator
View Patent ↗A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.
1. A vibration generator comprising:
a chassis;
a bottom plate fixed to the chassis;
a vibrator including a yoke and a magnet connected to the yoke;
a plate-like coil arranged at the bottom plate;
an plurality of arms supporting displaceably the vibrator in a direction parallel with respect to the plate-like coil; and
a vibrator retention unit coupling the vibrator and the plurality of arms, wherein
the magnet faces the plate-like coil in a direction of a winding axis of the plate-like coil,
the magnet is arranged between end portions of the yoke in the parallel direction,
the yoke includes a projecting portion, an end portion of the projecting, portion extending from the yoke toward the bottom plate, and
the projecting portion is fitted into a recessed portion of the vibrator retention unit between the plurality of arms in a longitudinal direction of the arms.
2. The vibration generator according to claim 1 , wherein
the vibrator retention unit and the projecting portion of the yoke are formed integrally.
3. The vibration generator according to claim 1 , wherein the vibrator retention unit moves laterally.
4. The vibration generator according to claim 1 , wherein
the recessed portion includes a surface facing the yoke in a direction from the yoke toward the plate-like coil, and
the recessed portion is recessed from the surface in a projecting direction of the projecting portion.
5. The vibration generator according to claim 1 , wherein
a side edge portion of the yoke includes the one end portion and is bent at about 90°.