Electroacoustic transducer

Patent metadata

Field	Value
Publication number	US-10009682-B2
Application number	US-201615286823-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Oct 6, 2015
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A new audio transducer for mobile devices having a collar with side openings that provide side venting to a back volume within an enclosure. The side openings eliminate the need for a typical frame and back vents thereon, which leads to a smaller size speaker. Each of the side openings have a maximum size less than the size of an adsorber material, which prevents the adsorber material coming into contact with the magnets, coil, and membrane of the speaker. The side openings and the size thereof also permit the enclosure to be directly filled with an adsorber material. The direct filling of the adsorber leads to more even and complete distribution of the adsorber within the back volume, which, in turn, improves sound quality of the speaker.

First claim

What is claimed is:

1. An audio transducer, comprising:
a membrane assembly comprising a membrane;
a magnet assembly comprising a pot plate having a perimeter; and
a collar sandwiched between the membrane assembly and the pot plate, the collar comprising:
a sidewall extending along each side of the collar perpendicular to the pot plate; and
one or more openings extending through the sidewall, wherein the openings are located on each side of the collar and wherein the openings provide an equal open area on each side of the collar.

2. The audio transducer of claim 1 , wherein the magnet assembly further comprises a population of magnets arranged proximate the perimeter of the pot plate, and one or more gaps, with a gap between each magnet; and wherein the openings in the sidewall of the collar are located proximate the gaps.

3. The audio transducer of claim 2 , wherein the openings in the sidewall of the collar are aligned with the gaps in the magnet assembly to provide a clear air pathway through the openings.

4. The audio transducer of claim 1 , wherein the collar is rectangular and has four corner regions and the openings are arranged in arrays proximate each corner region.

5. The audio transducer of claim 4 , wherein the openings are arranged in two arrays on each side of the collar.

6. The audio transducer of claim 1 , wherein the openings are circular.

7. The audio transducer of claim 1 , wherein the openings are arranged in rows and columns.

8. The audio transducer of claim 1 , wherein the openings are arranged to reduce tumbling of the membrane of the membrane assembly.

9. The audio transducer of claim 1 , wherein the openings are slots.

10. The audio transducer of claim 1 , wherein the collar further comprises a rim extending inward from the sidewall through which a rectangular opening extends.

11. The audio transducer of claim 1 , wherein the collar further comprises a stabilizing tab extending from the sidewall along one side of the collar.

12. The audio transducer of claim 1 , wherein the openings are located in the sidewall to permit an undistorted vibration of the membrane of the membrane assembly.

13. An audio transducer assembly, comprising:
an audio transducer comprising:
a membrane;
magnet system having a pot plate, the pot plate having a perimeter; and
a collar sandwiched between the membrane and the pot plate, the collar comprising:
a sidewall extending perpendicular to the pot plate; and
one or more openings extending through the sidewall, wherein the openings are located on one or more sides of the collar and wherein the openings provide an equal open area on each of the one or more sides of the collar; and

an enclosure in which the audio transducer is housed, the enclosure and audio transducer defining a back volume;
wherein the openings in the sidewall permit side venting air flow through the openings between the back volume and the audio transducer.

14. The audio transducer assembly of claim 13 , further comprising:
an adsorber material located in the back volume, wherein at least a portion of the adsorber material is in contact with the sidewall of the audio transducer; and wherein the openings in the sidewall have a maximum dimension smaller than the adsorber material so as to prevent the adsorber material from travelling through the openings into the audio transducer.

15. The audio transducer assembly of claim 13 , wherein the enclosure comprises:
a first enclosure portion; and
a second enclosure portion, wherein the second enclosure portion includes an opening corresponding to the pot plate of the audio transducer, such that when the audio transducer is placed in the first enclosure portion and the second enclosure portion is placed in the first enclosure portion, the pot plate seals the opening in the second enclosure portion.

16. The audio transducer assembly of claim 13 , wherein the magnet system further comprises a population of magnets arranged proximate the perimeter of pot plate, and one or more gaps, with a gap between each magnet; and wherein the openings in the sidewall of the collar are located proximate the gaps.

17. The audio transducer assembly of claim 16 , wherein the openings in the sidewall of the collar are aligned with the gaps in the magnet system to provide a clear air pathway through the openings.

18. A method of assembling a audio transducer assembly comprising (i) an enclosure having a first enclosure portion and a second enclosure portion, and (ii) a audio transducer having a membrane, a magnet assembly having a pot plate, and a collar sandwiched between the membrane and the pot plate, the collar having a sidewall with one or more openings extending through the sidewall, wherein the openings are located on one or more sides of the collar and wherein the openings provide an equal open area on each of the one or more sides of the collar, the method comprising:
i) placing the audio transducer into the first enclosure portion;
ii) filling the first enclosure portion with a desired amount of adsorber material, wherein the adsorber material may be filled directly against the audio transducer and wherein the openings in the sidewall have a maximum dimension smaller than the adsorber material so as to prevent the adsorber material from travelling through the openings into the audio transducer; and
iii) placing the second enclosure portion into first enclosure portion.

19. The method of assembling the audio transducer assembly according to claim 18 , wherein the second enclosure portion includes an opening corresponding to the pot plate, such that the method further comprises sealing the opening in the second enclosure portion with the pot plate of the audio transducer.

Assignees

• Sound Solutions Int Co Ltd

Inventors

• Schoeffmann Michael
• Klein Erich
• Bauer Heribert

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R2201/029

  Manufacturing aspects of enclosures transducers · CPC title

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R9/02

  Details · CPC title

• H04R1/288 Primary

  for loudspeaker transducers · CPC title