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CN-122027955-A - Acoustic device and electronic apparatus

CN122027955ACN 122027955 ACN122027955 ACN 122027955ACN-122027955-A

Abstract

The invention belongs to the technical field of electroacoustic conversion, and particularly relates to an acoustic device and electronic equipment, wherein the acoustic device is characterized by comprising a vibration system and a magnetic circuit system, and the vibration system comprises a vibrating diaphragm assembly and a voice coil which are connected; the magnetic circuit system comprises a magnetic yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the same side surface of the magnetic yoke, the central magnetic part comprises a first central magnet, a second central magnet, a third central magnet and a central magnetic conduction plate, the side magnetic part comprises a first side magnet, a second side magnet, a third side magnet and a side magnetic conduction plate, the magnetizing directions of the first central magnet and the second central magnet are parallel to the vibrating direction, the magnetizing directions of the second central magnet and the second side magnet are inclined relative to the vibrating direction, and the magnetizing directions of the third central magnet and the third side magnet are horizontally arranged. The structure can improve the BL value of the acoustic device, further reduce distortion and improve the acoustic performance of the acoustic device.

Inventors

  • GUO YANG
  • CAO MINGJUN
  • CAI XIAODONG

Assignees

  • 歌尔股份有限公司

Dates

Publication Date
20260512
Application Date
20251222

Claims (10)

  1. 1. An acoustic device, comprising: The vibration system comprises a vibrating diaphragm assembly and a voice coil which are connected; The magnetic circuit system comprises a magnetic conducting yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the same side surface of the magnetic conducting yoke, the side magnetic part is arranged on the outer side of the central magnetic part and is separated from the central magnetic part to form a magnetic gap into which the voice coil can extend, the central magnetic part comprises a first central magnet, a second central magnet, a third central magnet and a central magnetic conducting plate, the first central magnet and the second central magnet are connected to the magnetic conducting yoke, the first central magnet is arranged on the outer side of the second central magnet, the third central magnet and the central magnetic conducting plate are stacked on the first central magnet and the second central magnet, the central magnetic conducting plate is arranged on the outer side of the third central magnet, the side magnetic part comprises a first side magnet, a second side magnet, a third side magnet and a side magnetic conducting plate, the first side magnet and the second side magnet are connected to the magnetic conducting yoke, the second side magnet is arranged on the outer side of the first side magnet, the third side magnet and the side magnet is stacked on the first side magnet and the second side magnet, the side magnetic conducting plate is arranged on the outer side of the first side magnet, The magnetizing directions of the first center magnet and the first side magnet are parallel to the vibrating direction of the vibrating diaphragm assembly, the magnetizing directions of the second center magnet and the second side magnet are inclined relative to the vibrating direction, the magnetizing directions of the third center magnet and the third side magnet are perpendicular to the vibrating direction, the polarities of the magnetic poles of the first center magnet and the second center magnet, which are far away from one end of the magnetic yoke, are the same, the polarities of the magnetic poles of the first side magnet and the second side magnet, which are far away from one end of the magnetic yoke, are the same, the polarities of the magnetic poles of the first center magnet, which are far away from one end of the magnetic yoke, are opposite to the polarities of the magnetic poles of the first side magnet, which are far away from one end of the magnetic yoke, are the same, and the polarities of the magnetic poles of the third side magnet, which are far away from one end of the magnetic yoke, are the same as the magnetic poles of the first side magnet, which are far away from one end of the magnetic yoke.
  2. 2. The acoustic device of claim 1, wherein the magnetizing directions of the second center magnet and the second side magnet are inclined at an angle of greater than 0 ° and less than or equal to 36 ° with respect to the vibration direction of the diaphragm assembly.
  3. 3. The acoustic device of claim 2, wherein the magnetizing directions of the second center magnet and the second side magnet are inclined at an angle of 18 ° with respect to the vibration direction of the diaphragm assembly.
  4. 4. The acoustic device according to claim 1, wherein a width ratio of the side magnetic conductive plate and the third side magnet in a radial direction of the magnetic circuit is 1 (0.5-4); And/or the width ratio of the central magnetic conduction plate to the third central magnet is 1 (0.5-4) along the radial direction of the magnetic circuit system.
  5. 5. The acoustic device of claim 1, wherein the width ratio of the third side magnet and the side magnetically permeable plate is 1:1 in the radial direction of the magnetic circuit; And/or, along the radial direction of the magnetic circuit system, the width ratio of the third central magnet to the central magnetic conduction plate is 1:1.
  6. 6. The acoustic device of claim 1 wherein the profile of the side magnetically permeable plate is substantially the same as the outer profile of the first side magnet; and/or the outline of the central magnetic conduction plate is approximately the same as the outline of the first central magnet.
  7. 7. The acoustic device of claim 1, wherein the second center magnet includes a plurality of magnets and is disposed at intervals along a circumferential direction of the magnetic circuit, the first center magnet includes a plurality of magnets and is disposed at intervals along the circumferential direction of the magnetic circuit, and the third center magnet is disposed corresponding to the second center magnet and has substantially the same outer contour.
  8. 8. The acoustic device of claim 7, wherein the magnetic gap is rectangular ring-shaped, the first center magnet comprises a pair of first trapezoidal magnets arranged corresponding to long sides of the rectangle and a pair of second trapezoidal magnets arranged corresponding to short sides of the rectangle, the center magnetic conductive plate comprises a first center magnetic conductive plate laminated on the first trapezoidal magnets and a second center magnetic conductive plate laminated on the second trapezoidal magnets, two first center magnetic conductive plates are arranged on each first trapezoidal magnet, and the two first center magnetic conductive plates are arranged at intervals along the direction of the long sides of the rectangle; And/or the second center magnets comprise four, and each second center magnet is approximately triangular prism-shaped and surrounds a rectangle.
  9. 9. The acoustic device of claim 1, wherein the diaphragm assembly comprises a central diaphragm and a diaphragm looped around the central diaphragm, one end of the voice coil is connected to the central diaphragm, and the other end extends into the magnetic gap; the acoustic device further comprises a shell, one side face of the shell is connected with the vibrating diaphragm along the axial direction of the shell, and the other side face of the shell is connected with the side magnetic part.
  10. 10. An electronic device comprising an acoustic device according to any one of claims 1-9.

Description

Acoustic device and electronic apparatus Technical Field The invention belongs to the technical field of electroacoustic conversion, and particularly relates to an acoustic device and electronic equipment. Background BL performance, which is one of the core parameters for measuring electroacoustic conversion efficiency of an acoustic device, is currently the key to the development of many electroacoustic technologies, and is directly related to the sensitivity, tone quality and power processing capability of the acoustic device. At present, one of the technical challenges is contradiction between miniaturization and high performance, the requirements on the internal space of equipment are severe, the size of a magnetic circuit is limited, and BL performance is difficult to be high. Therefore, how to improve the BL performance of an acoustic device in a limited space is a technical problem that needs to be solved currently. Disclosure of Invention The invention aims to provide an acoustic device and an electronic device, so as to at least partially solve the technical problems. The present invention provides an acoustic device comprising: The vibration system comprises a vibrating diaphragm assembly and a voice coil which are connected; The magnetic circuit system comprises a magnetic conducting yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the same side surface of the magnetic conducting yoke, the side magnetic part is arranged on the outer side of the central magnetic part and is separated from the central magnetic part to form a magnetic gap into which the voice coil can extend, the central magnetic part comprises a first central magnet, a second central magnet, a third central magnet and a central magnetic conducting plate, the first central magnet and the second central magnet are connected to the magnetic conducting yoke, the first central magnet is arranged on the outer side of the second central magnet, the third central magnet and the central magnetic conducting plate are stacked on the first central magnet and the second central magnet, the central magnetic conducting plate is arranged on the outer side of the third central magnet, the side magnetic part comprises a first side magnet, a second side magnet, a third side magnet and a side magnetic conducting plate, the first side magnet and the second side magnet are connected to the magnetic conducting yoke, the second side magnet is arranged on the outer side of the first side magnet, the third side magnet and the side magnet is stacked on the first side magnet and the second side magnet, the side magnetic conducting plate is arranged on the outer side of the first side magnet, The magnetizing directions of the first center magnet and the first side magnet are parallel to the vibrating direction of the vibrating diaphragm assembly, the magnetizing directions of the second center magnet and the second side magnet are inclined relative to the vibrating direction, the magnetizing directions of the third center magnet and the third side magnet are perpendicular to the vibrating direction, the polarities of the magnetic poles of the first center magnet and the second center magnet, which are far away from one end of the magnetic yoke, are the same, the polarities of the magnetic poles of the first side magnet and the second side magnet, which are far away from one end of the magnetic yoke, are the same, the polarities of the magnetic poles of the first center magnet, which are far away from one end of the magnetic yoke, are opposite to the polarities of the magnetic poles of the first side magnet, which are far away from one end of the magnetic yoke, are the same, and the polarities of the magnetic poles of the third side magnet, which are far away from one end of the magnetic yoke, are the same as the magnetic poles of the first side magnet, which are far away from one end of the magnetic yoke. The acoustic device provided by the invention can also have the following additional technical characteristics: In some embodiments of the present invention, the magnetizing directions of the second center magnet and the second side magnet are inclined at an angle of greater than 0 ° and less than or equal to 36 ° with respect to the vibration direction of the diaphragm assembly. In some embodiments of the invention, the magnetizing directions of the second center magnet and the second side magnet are inclined at an angle of 18 ° with respect to the vibrating direction of the diaphragm assembly. In some embodiments of the present invention, the width ratio of the third side magnet to the side magnetic conductive plate is 1 (0.5-4) along the radial direction of the magnetic circuit system; and/or the width ratio of the third center magnet to the center magnetic conduction plate is 1 (0.5-4) along the radial direction of the magnetic circuit system. In some embodiments of the pr