Installation structure for acoustic transducer

Patent metadata

Field	Value
Publication number	US-9373314-B2
Application number	US-201314762611-A
Country	US
Kind code	B2
Filing date	Dec 27, 2013
Priority date	Jan 22, 2013
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

An installation structure for an acoustic transducer for vibrating a vibrated body in a first direction includes a magnetic-path forming portion; a movable unit having an electromagnetic coupling portion and configured to vibrate in the first direction; an attachment portion which attaches the magnetic-path forming portion to a fixed portion; a connector connected to the vibrated body and connecting the movable unit to the vibrated body; and a displacement permitting mechanism configured to permit electromagnetic coupling between the magnetic-path forming portion and the electromagnetic coupling portion to be maintained and to permit the vibration of the movable unit to be transmitted to the vibrated body when the connector is displaced with respect to the fixed portion within a predetermined range in an intersecting direction that intersects the first direction. The displacement permitting mechanism is provided at at least one of the attachment portion, the movable unit, and the connector.

First claim

The invention claimed is:

1. An installation structure for an acoustic transducer configured to operate in accordance with an audio signal to vibrate a vibrated body in a first direction, the installation structure comprising:
a magnetic-path forming portion forming a magnetic path;
a movable unit having an electromagnetic coupling portion electromagnetically coupled to the magnetic-path forming portion, the movable unit being configured to vibrate in the first direction when the electromagnetic coupling portion is driven by the magnetic-path forming portion in response to a drive signal based on the audio signal;
an attachment portion that attaches the magnetic-path forming portion to a fixed portion;
a connector connected to the vibrated body, the connector connecting the movable unit to the vibrated body fixedly in the first direction for transmitting vibration of the movable unit to the vibrated body and having at least one contact surface and a chuck member; and
a displacement permitting mechanism configured to, when the connector is displaced with respect to the fixed portion within a predetermined range in an intersecting direction that intersects the first direction, permit electromagnetic coupling between the magnetic-path forming portion and the electromagnetic coupling portion to be maintained and permit the vibration of the movable unit to be transmitted to the vibrated body,
wherein the displacement permitting mechanism is provided at at least one of the movable unit or the connector,
wherein the movable unit comprises a rod member having a first end portion connected to the electromagnetic coupling portion, and a second end portion connected to the connector and having a spherical portion,
wherein the displacement permitting mechanism comprises:
the spherical portion; and
the at least one contact surface held in contact with the spherical portion when the connector is displaced with respect to the magnetic-path forming portion within the predetermined range in the intersecting direction, and

wherein the chuck member holds the spherical portion so that the spherical portion is held in contact with the at least one contact surface.

2. The installation structure for the acoustic transducer according to claim 1 , wherein the displacement permitting mechanism is configured so that, when the connector is displaced with respect to the fixed portion within the predetermined range, the displacement permitting mechanism permits the rod member to be relatively displaced with respect to the electromagnetic coupling portion in the intersecting direction.

3. The installation structure for the acoustic transducer according to claim 1 , wherein the displacement permitting mechanism is configured so that, when the connector is displaced with respect to the magnetic-path forming portion within the predetermined range in the intersecting direction, the displacement permitting mechanism permits the second end portion of the rod member to be connected to the connector in a state in which the rod member is inclined with respect to the first direction.

4. The installation structure for the acoustic transducer according to claim 1 , wherein:
the connector further comprises a pointer member fixed to the vibrated body,
the pointer member includes the at least one contact surface having a tapered surface, and
the chuck member is engaged with the pointer member so that the spherical portion is held in contact with the tapered surface of the pointer member.

5. The installation structure for the acoustic transducer according to claim 4 , wherein:
the chuck member also has a tapered surface, and
the chuck member is engaged with the pointer member so that the spherical portion is disposed and held between the tapered surface of the chuck member and the tapered surface of the pointer member.

Assignees

• Yamaha Corp

Inventors

• Takahashi Yuji
• Ohnishi Kenta

Classifications

• H04R2440/05

  Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels · CPC title

• H04R9/02

  Details · CPC title

• G10H3/22

  using electromechanically actuated vibrators with pick-up means (G10H3/24 takes precedence) · CPC title

• G10H1/32 Primary

  Constructional details · CPC title

• G10H2250/451

  Plucked or struck string instrument sound synthesis, controlling specific features of said sound · CPC title