Installation structure for acoustic transducer, musical instrument, and installation method of acoustic transducer

Patent metadata

Field	Value
Publication number	US-9779712-B2
Application number	US-201515301996-A
Country	US
Kind code	B2
Filing date	Apr 9, 2015
Priority date	Apr 9, 2014
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

An installation structure for an acoustic transducer configured to vibrate a vibrated body in a first direction so as to permit the vibrated body to generate sounds, wherein the acoustic transducer includes: a magnetic-path forming portion that forms a magnetic path; and a vibrating portion configured to vibrate in the first direction with respect to the magnetic-path forming portion, and wherein an anchor is provided between the vibrating portion and the vibrated body such that the anchor is undetachably fixed to the vibrated body by bonding and such that the anchor is detachably fixed to the vibrating portion.

First claim

The invention claimed is:

1. An installation structure for an acoustic transducer configured to vibrate a vibrated body in a first direction so as to permit the vibrated body to generate sounds,
wherein the acoustic transducer includes:
a magnetic-path forming portion that forms a magnetic path; and
a vibrating portion configured to vibrate in the first direction with respect to the magnetic-path forming portion,

wherein an anchor is provided between the vibrating portion and the vibrated body such that the anchor is undetachably fixed to the vibrated body by bonding and such that the anchor is detachably fixed to the vibrating portion,
wherein a facing surface of the anchor that faces the vibrated body includes a bonding region bonded to the vibrated body by an adhesive and a non-bonding region not bonded to the vibrated body, and
wherein a wetting preventive structure is formed on the facing surface to prevent the adhesive that leaks from the bonding region from spreading over the non-bonding region.

2. The installation structure for the acoustic transducer according to claim 1 ,
wherein a positioning protrusion is formed at one of the vibrating portion and the anchor so as to protrude toward the other of the vibrating portion and the anchor, and
wherein a positioning recess is formed in the other of the vibrating portion and the anchor such that the positioning protrusion is insertable in the positioning recess in the first direction.

3. The installation structure for the acoustic transducer according to claim 1 ,
wherein the anchor is provided with a through-hole that penetrates therethrough in the first direction in a state in which the anchor is attached to the vibrated body, and
wherein, in the state in which the anchor is attached to the vibrated body, a space is defined by the vibrated body and the anchor, and at least part of the space is located between the bonding region of the anchor and the through-hole, so that the wetting preventive structure prevents the adhesive from spreading over the non-bonding region.

4. The installation structure for the acoustic transducer according to claim 3 , wherein the space is partially defined by a step formed on the facing surface of the anchor that faces the vibrated body.

5. The installation structure for the acoustic transducer according to claim 3 , wherein the through-hole functions as the positioning recess.

6. The installation structure for the acoustic transducer according to claim 3 , wherein the through-hole is a screw through-hole through which a screw passes for attaching the anchor to the vibrated body.

7. The installation structure for the acoustic transducer according to claim 3 , wherein the through-hole is a threaded hole into which a screw is screwed for detachably fixing the vibrating portion to the anchor.

8. An installation structure for an acoustic transducer configured to vibrate a vibrated body in a first direction so as to permit the vibrated body to generate sounds,
wherein the acoustic transducer includes: a magnetic-path forming portion that forms a magnetic path; a vibrating portion configured to vibrate in the first direction with respect to the magnetic-path forming portion; and an anchor having a bonding region on which an adhesive is applied, the anchor being provided between the vibrating portion and the vibrated body such that the anchor is undetachably fixed to the vibrated body by bonding,
wherein the anchor is provided with a through-hole that penetrates therethrough in the first direction in a state in which the anchor is attached to the vibrated body, and
wherein, in the state in which the anchor is attached to the vibrated body, a space is defined by the vibrated body and the anchor, and at least part of the space is located between the bonding region of the anchor and the through-hole.

9. The installation structure for the acoustic transducer according to claim 8 ,
wherein a positioning protrusion is formed at one of the vibrating portion and the anchor so as to protrude toward the other of the vibrating portion and the anchor, and
wherein a positioning recess is formed in the other of the vibrating portion and the anchor such that the positioning protrusion is insertable in the positioning recess in the first direction.

10. The installation structure for the acoustic transducer according to claim 8 , wherein the space is partially defined by a step formed on the facing surface of the anchor that faces the vibrated body.

11. The installation structure for the acoustic transducer according to claim 9 , wherein the through-hole functions as the positioning recess.

12. The installation structure for the acoustic transducer according to claim 8 , wherein the through-hole is a screw through-hole through which a screw passes for attaching the anchor to the vibrated body.

13. The installation structure for the acoustic transducer according to claim 8 , wherein the through-hole is a threaded hole into which a screw is screwed for detachably fixing the vibrating portion to the anchor.

14. A method of installing, on a vibrated body, an acoustic transducer including a magnetic-path forming portion that forms a magnetic path and a vibrating portion configured to vibrate in a first direction with respect to the magnetic-path forming portion, the acoustic transducer being configured to vibrate the vibrated body in the first direction so as to permit the vibrated body to generate sounds, the method comprising:
an anchor fixing step of undetachably fixing the anchor to the vibrated body by bonding;
a vibrating-portion fixing step of detachably fixing the vibrating portion to the anchor such that the anchor, which has been fixed to the vibrated body in the anchor fixing step, is sandwiched between the vibrating portion and the vibrated body, and
a wetting preventive structure forming step of forming, on a facing surface of the anchor facing the vibrated body and including a bonding region bonded to the vibrated body by an adhesive and a non-bonding region not bonded to the vibrated body, a wetting preventive structure to prevent the adhesive that leaks from the bonding region from spreading over the non-bonding region.

Assignees

• Yamaha Corp

Inventors

• Ohnishi Kenta

Classifications

• H04R7/04

  Plane diaphragms · CPC title

• G10H1/32

  Constructional details · CPC title

• G10H2220/461

  Transducers, i.e. details, positioning or use of assemblies to detect and convert mechanical vibrations or mechanical strains into an electrical signal, e.g. audio, trigger or control signal · CPC title

• H04R31/006

  Interconnection of transducer parts (of diaphragm and outer suspension by moulding H04R31/003) · CPC title

• G10H3/146 Primary

  using a membrane, e.g. a drum; Pick-up means for vibrating surfaces, e.g. housing of an instrument · CPC title