Coil with different windings

Patent metadata

Field	Value
Publication number	US-11729556-B2
Application number	US-202017134436-A
Country	US
Kind code	B2
Filing date	Dec 27, 2020
Priority date	Dec 30, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Two coils are wrapped in one of numerous different implementations. In one implementation, the two coils are wrapped about a portion of a bobbin that has at least three flanges. The first coil is disposed about a first portion of the bobbin between the first flange and the second flange, and a second coil is disposed about a second portion of the bobbin between the second flange and the third flange.

First claim

What is claimed is:

1. A bobbin comprising:
at least a first flange, a second flange, and a third flange;
a first coil disposed about a first portion of the bobbin between the first flange and the second flange, the first coil having a first end and a second end; and
a second coil, separate from the first coil, disposed about a second portion of the bobbin between the second flange and the third flange, the second coil having a third end and a fourth end.

2. The bobbin of claim 1 , further comprising a reactive circuit element coupled with the first coil or the second coil.

3. The bobbin of claim 2 , wherein the reactive circuit element is coupled in series with the first coil or the second coil.

4. The bobbin of claim 2 , wherein the reactive circuit element is coupled in parallel with the first coil or the second coil.

5. The bobbin of claim 2 , wherein the reactive circuit element includes a capacitor.

6. The bobbin of claim 2 , wherein the reactive circuit element is mounted directly on the bobbin.

7. The bobbin of claim 1 , further comprising a plurality of electrical terminals embedded in the bobbin, each electrical terminal electrically coupled to a corresponding at least one end of the first coil or the second coil.

8. The bobbin of claim 1 , wherein the first coil has a different number of turns from the second coil.

9. The bobbin of claim 1 comprising a lumen configured to allow an armature to extend through the bobbin.

10. An acoustic receiver comprising:
a housing;
a diaphragm disposed in the housing and at least partially defining a front volume and a back volume, the front volume acoustically coupled to an acoustic output of the receiver;
an armature linked to the diaphragm; and
a bobbin disposed about a portion of the armature, the bobbin comprising:
at least a first flange, a second flange, and a third flange;
a first coil disposed about a first portion of the bobbin between the first flange and the second flange, the first coil having a first end and a second end; and
a second coil, separate from the first coil, disposed about a second portion of the bobbin between the second flange and the third flange, the second coil having a third end and a fourth end.

11. The acoustic receiver of claim 10 comprising a lumen configured to allow an armature to extend through the bobbin.

Assignees

• Knowles Electronics Llc

Inventors

• Zhang Yahui
• Albahri Shehab
• Scheleski Richard
• Miller Thomas
• King Charles

Classifications

• H04R9/046 Primary

  Construction · CPC title

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• H04R3/12

  for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)} · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R9/063

  using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence) · CPC title