LOUDSPEAKER STRUCTURE

• US 20200137498A1
• Filed: 06/07/2018
• Published: 04/30/2020
• Est. Priority Date: 06/09/2017
• Status: Active Grant

• Current Assignee: ASK Industries Societa' Per Azioni
• Original Assignee: ASK Industries Societa' Per Azioni
• Inventors: CINANNI, Dario
• Granted Patent: US 11,057,710 B2
• Time in Patent Office: Days
• CPC Class Codes: H04R 2207/021 Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges
• CPC Class Codes: H04R 7/26 Damping by means acting directly on free portion of diaphragm or cone air damping H04R1/28
• CPC Class Codes: H04R 9/027 Air gaps using a magnetic fluid
• CPC Class Codes: H04R 9/045 Mounting H04R9/043 takes precedence
• CPC Class Codes: H04R 9/06 Loudspeakers

Abstract

A loudspeaker having: a magnetic unit, a voice coil axially movable in the air gap of the magnetic unit, a basket fixed to the magnetic unit, a membrane fixed to the cylindrical support of the voice coil and connected to the basket, and a vibrating element fixed to said membrane by means of a rim. The vibrating element has a base fixed to the membrane, a shank that projects from the base and a mass that projects from the shank in cantilever mode.

Claims

1. Loudspeaker comprising:

a magnetic unit wherein an air gap is generated;

a voice coil mounted on a cylindrical support and disposed in such manner as to move axially in the air gap of the magnetic units;

a basket fixed to the magnetic unit;

a membrane fixed to the cylindrical support of the voice coil and connected to the basket;

a rim that connects a peripheral part of the membrane to the basket; and

at least one vibrating element configured to control vibrating modes of said membrane, said vibrating element being fixed to said membrane; and

said vibrating element comprising;

a base fixed to said membrane;

a shank that projects from the base; and

a mass that projects from the shank in cantilever mode;

wherein said mass is made of a rigid non-deformable material;

said mass is free for oscillating in any direction; and

said vibrating element is made of injection molded plastic material.

2. The loudspeaker of claim 1, wherein the vibrating element is made of plastic material in one piece.

3. The loudspeaker of claim 1, wherein the mass is made of hard plastic.

4. The loudspeaker of claim 1, wherein said vibrating element is disposed in an area of the surface of the membrane with the highest displacement value at a set frequency, in relation to the vibration modes of the membrane.

5. The loudspeaker of claim 4, wherein said vibrating element is disposed in a central portion of said membrane.

6. The loudspeaker of claim 1, wherein said mass of the vibrating element has a disc-like shape.

7. The loudspeaker of claim 6, wherein said shank of the vibrating element has a cylindrical shape and is disposed in axial position with respect to said mass.

8. The loudspeaker of claim 6, wherein said base of the vibrating element has a disc-like shape with smaller diameter than said mass.

9. The loudspeaker of claim 1, wherein said mass of the vibrating element has a diameter smaller than 1/10 of the diameter of the membrane.

10. The loudspeaker of claim 1, wherein said vibrating element has a weight lower than 5% of the weight of the membrane and of the rim of the loudspeaker.

11. The loudspeaker of claim 1, wherein said vibrating element is disposed above said membrane with the mass facing towards the outside of the loudspeaker.

12. The loudspeaker of claim 1, wherein said vibrating element is disposed under said membrane with the mass facing towards said magnetic unit of the loudspeaker.

13. The loudspeaker of claim 1, comprising a first vibrating element disposed above the membrane and a second vibrating element disposed under the membrane.