Vibration generating device
A vibration generating device includes a movable body in a housing, supported to vibrate along a first direction; a bracket attached to the housing, including a body plate extending in a second direction and a first reinforcing plate extending in a third direction from one end of the body plate in the second direction; a coil attached to the body plate, including main-bundle-wire-parts in the second direction connected by a sub-bundle-wire-part; and a magnet attached to the movable body on another side of the coil in the third direction, generating a magnetic flux toward the main-bundle-wire-part. One end of the magnet in the second direction is inside one end of the sub-bundle-wire-part in the second direction. The first reinforcing plate extends from inside one end of the sub-bundle-wire-part in the second direction and outside one end of the magnet in the second direction, toward another side in the third direction.
1 . A vibration generating device comprising:
a housing;
a movable body accommodated in the housing;
a support member configured to support the movable body so as to be able to vibrate along a first direction;
a bracket including a body plate part extending in a second direction perpendicular to the first direction and a reinforcing part including a first reinforcing plate part extending in a third direction perpendicular to the first direction and the second direction via a first bent part from one end of the body plate part in the second direction, the bracket being attached to the housing via an attachment plate part;
a coil including a main bundle wire part including a plurality of conductive wires extending in the second direction and a sub-bundle wire part connecting two of the main bundle wire parts that are adjacent to each other, the coil being attached to one side of the body plate part in the third direction; and
a permanent magnet configured to generate a magnetic flux directed toward the main bundle wire part, the permanent magnet being attached to the movable body on another side of the coil in the third direction, wherein
one end of the permanent magnet in the second direction is positioned inside relative to one end of the sub-bundle wire part in the second direction, and
the first reinforcing plate part extends from a position that is inside relative to one end of the sub-bundle wire part in the second direction and outside relative to one end of the permanent magnet in the second direction, toward another side in the third direction.
2 . The vibration generating device according to claim 1 , wherein the reinforcing part includes a second reinforcing plate part extending from another end of the first reinforcing plate part in the third direction to outside in the second direction via the second bent part.
3 . The vibration generating device according to claim 2 , wherein the attachment plate part extends outward from an outer end of the second reinforcing plate part.
4 . The vibration generating device according to claim 1 , wherein
the bracket is formed of a metal plate including a material mark,
the reinforcing part includes the first bent part formed such that a bent line extends along a direction intersecting a direction of the material mark, and
the first bent part is not formed such that the bent line extends in a direction parallel to the direction of the material mark.
5 . The vibration generating device according to claim 1 , wherein the bracket is formed of a metal having a higher conductivity and a lower strength than a material forming the housing, the bracket being configured to reduce an acceleration of the movable body by generating an eddy current so as to cancel a change in the magnetic flux when the permanent magnet attached to the movable body moves along the first direction.
6 . The vibration generating device according to claim 5 , wherein
the housing is formed of stainless steel, and
the bracket is formed of copper or a copper alloy.