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Magnetic yoke for hearing aid and moving iron unit

A technology for hearing aids and yokes, applied in hearing aids, electrical components, etc., can solve the problems of flaws in the vibration and sound of the diaphragm, magnetic loss, etc., to achieve high authenticity and reduction, reduce the loss of the magnetic field, and the effect of accurate vibration

Active Publication Date: 2015-07-01
KNOWLES IPC M
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There will be a loss of magnetic force, resulting in flaws in the vibration of the diaphragm

Method used

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  • Magnetic yoke for hearing aid and moving iron unit
  • Magnetic yoke for hearing aid and moving iron unit
  • Magnetic yoke for hearing aid and moving iron unit

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Embodiment Construction

[0016] The present invention discloses that the present invention provides a magnetic yoke for generating accurate vibration and a moving iron unit including the magnetic yoke.

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0018] The invention provides a magnetic yoke, which consists of a plurality of square ring-shaped sheets stacked one after another, the uppermost 2-4 ring-shaped sheets are not closed, and gaps are left; the ring-shaped sheets in the middle position are arranged on the periphery Ther...

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Abstract

The invention provides a magnetic yoke for a hearing aid. A plurality of square annular sheets are stacked up in sequence; the uppermost 2-4 sheet rings are not enclosed, and gaps are left; and positioning blocks are arranged on the peripheries of the middle sheets. A connecting mechanism is actually positioned in the magnetic field of the magnetic yoke, and an armature connected with the connecting mechanism is also positioned in the magnetic field of the magnetic yoke, so that the loss of the magnetic field is reduced, and the vibration of a vibration film is more accurate. Through use of a moving iron unit of the magnetic yoke, the trueness degree and reduction degree of sound are increased.

Description

technical field [0001] The invention relates to the technical field of hearing aids, in particular to a magnetic yoke for hearing aids and a moving iron unit. Background technique [0002] The yoke usually refers to a soft magnetic material that does not produce a magnetic field (magnetic force line) itself, and only transmits the magnetic force line in the magnetic circuit. The yoke is generally made of soft iron, A3 steel and soft magnetic alloy with relatively high magnetic permeability. In some special Occasionally, the yoke is also made of ferrite materials. [0003] In the existing hearing aid structure, a general magnetic yoke is formed by welding 6 to 10 iron sheets of the same shape. In the prior art, the magnetic yoke is made of high magnetic permeability material. Its function is to constrain the magnetic force lines generated by the induction coil to scatter outward, so that the magnetic force lines are concentrated on the yoke, which mainly plays a role of magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R25/00
Inventor 钱晓晨骆兴顺
Owner KNOWLES IPC M