Magnetic potential transducer and electronic apparatus using same

Patent metadata

Field	Value
Publication number	US-12010500-B2
Application number	US-201917625660-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Jul 8, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

Disclosed is a magnetic potential transducer, comprising a fixed component and a movable component. The fixed component comprises: at least one static magnetic field generating device, the static magnetic field generating device forms a static magnetic field on the magnetic potential transducer; and at least one alternating magnetic field generating device, the alternating magnetic field generating device generates an alternating magnetic field on the magnetic potential transducer, and the alternating magnetic field is orthogonal or partially orthogonal to the static magnetic field. The movable component comprises at least one movable device and at least one suspension device, the movable device is provided with a magnetic conductive material, the magnetic conductive material moves in the magnetic potential transducer; at least a part of the magnetic conductive material is provided in an area where the alternating magnetic field and the static magnetic field overlap; a magnetic field force generated by the interaction.

First claim

What is claimed is:

1. A magnetic potential transducer, comprising a fixed component and a movable component, wherein the fixed component comprises:
at least one static magnetic field generating device, a static magnetic field is formed on the magnetic potential transducer by the static magnetic field generating device; and
at least one alternating magnetic field generating device, an alternating magnetic field is generated on the magnetic potential transducer by the alternating magnetic field generating device, and the alternating magnetic field is orthogonal or partially orthogonal to the static magnetic field,
wherein the movable component comprises at least one movable device and at least one suspension device, and
wherein the movable device is provided with a magnetic conductive material, the magnetic conductive material moves integrally in the magnetic potential transducer, and at least a part of the magnetic conductive material is disposed in an area where the alternating magnetic field and the static magnetic field are overlapped, such that the static magnetic field and the alternating magnetic field are converged, and
wherein a magnetic field force generated by an interaction between the static magnetic field and the alternating magnetic field are applied on the magnetic conductive material, so as to drive the movable component to move,
wherein a relative permeability of the magnetic conductive material of the movable device is greater than 3000, and a relative permeability of the suspension device is less than 1000.

2. The magnetic potential transducer according to claim 1 , wherein the static magnetic field generating device is at least one permanent magnet or at least one electromagnet in which an electric current is non-alternating, and
wherein the alternating magnetic field generating device is a coil through which an alternating current passes, a conductor to which a vortex electric field is applied, or a reversible permanent magnet.

3. The magnetic potential transducer according to claim 2 , wherein the alternating magnetic field generating device is a coil provided along a horizontal direction, an electromagnet is formed by the coil and the magnetic conductive material of the movable device, the alternating magnetic field is generated by the coil when the alternating current passes through the coil, and the alternating magnetic field is orthogonal or partially orthogonal to the static magnetic field.

4. The magnetic potential transducer according to claim 3 , wherein the magnetic conductive material has a planar sheet structure.

5. The magnetic potential transducer according to claim 1 , wherein the suspension device is further provided with an elastic restoring device, one end of the elastic restoring device is fixed on the movable device, the other end of the elastic restoring device is fixed in the magnetic potential transducer, and the elastic restoring device has a restoring force for restoring the movable device to a balance position.

6. The magnetic potential transducer according to claim 5 , wherein the elastic restoring device of the suspension device is one or more of a diaphragm sheet, a spring and an elastic sheet.

7. The magnetic potential transducer according to claim 5 , wherein the transducer is a magnetic potential speaker, the suspension device comprises a diaphragm, the magnetic conductive material is mounted on a surface of the diaphragm, the diaphragm isolates a front cavity and a rear cavity of the magnetic potential speaker, an edge of the diaphragm is fixed in the magnetic potential speaker, and the diaphragm forms a part of the elastic restoring device.

8. The magnetic potential transducer according to claim 1 , wherein the magnetic conductive material is a soft magnetic material or a weakly hard magnetic material.

9. An electronic apparatus, comprising the magnetic potential transducer according to claim 1 .

10. The electronic apparatus according to claim 9 , wherein the electronic apparatus is a mobile phone, a tablet computer, a TV, an auto audio or a loudspeaker.

Assignees

• Goertek Inc

Inventors

• Liu Chunfa
• Zu Fenglei
• Yang Xinfeng

Classifications

• H04R9/025

  Magnetic circuit · CPC title

• H04R7/18

  at the periphery · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R9/18 Primary

  Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency · CPC title

• H04R13/00 Primary

  Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet · CPC title