Sound source device of horn

Patent metadata

Field	Value
Publication number	US-2018257559-A1
Application number	US-201715761072-A
Country	US
Kind code	A1
Filing date	Mar 6, 2017
Priority date	Mar 25, 2016
Publication date	Sep 13, 2018
Grant date	—

Abstract

A sound source device of a horn according to one aspect of the present invention includes: a diaphragm; a movable iron core connected to the diaphragm through a support point; and a coil (bobbin and winding) into which a driving signal is inputted. The driving signal includes a first signal component that resonates with the diaphragm and a second signal component of a second frequency that resonates with the movable iron core of a first frequency and has a chord relationship with the first frequency. The support point is provided at a position eccentric from the center of the diaphragm, and the movable iron core is structured such that a gravity center is displaced further in an eccentric direction than the support point.

First claim

1 . A sound source device of a horn mounted on a vehicle, comprising:
a diaphragm; a movable iron core connected to the diaphragm through a support point; and a coil into which a driving signal is inputted and which drives the movable iron core, the driving signal including a first signal component of a first frequency which resonates with the diaphragm, and a second signal component of a second frequency which resonates with the movable iron core and has a chord relationship with the first frequency, wherein the support point is provided at a position eccentric from a center of the diaphragm, and the movable iron core is structured so that a gravity center of the movable iron core is displaced further in an eccentric direction of the support point than the support point.

2 . The sound source device according to claim 1 , wherein the movable iron core is disposed to be inclined against a direction orthogonal to the diaphragm.

3 . The sound source device according to claim 1 , wherein the movable iron core includes: a support portion which is disposed closer to the diaphragm than the gravity center and supports the movable iron core at the support point; and a main body portion which is connected to an end portion of the support portion on a side opposite to the support point and disposed so that a central axis of the main body portion is displaced in the eccentric direction from a central axis of the support portion.

4 . The sound source device according to claim 1 , wherein a length between the support point and the gravity center is set to a length with which the second frequency of a target is obtained.

Assignees

• Mazda Motor

Inventors

• Ino Hisanobu
• Ohsugi Ikuyo
• Nabeshima Noriyuki

Classifications

• G10K9/13 Primary

  using electromagnetic driving means · CPC title

• B60Q5/00 Primary

  Arrangement or adaptation of acoustic signal devices · CPC title

• G10K9/20

  Sounding members · CPC title

• G10K11/04

  Acoustic filters {; Acoustic resonators} · CPC title

• G10K9/22

  Mountings; Casings · CPC title