WO2021114498A1 - Procédé de fabrication d'un système de circuit magnétique - Google Patents

Procédé de fabrication d'un système de circuit magnétique Download PDF

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Publication number
WO2021114498A1
WO2021114498A1 PCT/CN2020/078087 CN2020078087W WO2021114498A1 WO 2021114498 A1 WO2021114498 A1 WO 2021114498A1 CN 2020078087 W CN2020078087 W CN 2020078087W WO 2021114498 A1 WO2021114498 A1 WO 2021114498A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
circuit system
powder metallurgy
magnetic circuit
magnetic steel
Prior art date
Application number
PCT/CN2020/078087
Other languages
English (en)
Chinese (zh)
Inventor
宋威
张帆
司秀江
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021114498A1 publication Critical patent/WO2021114498A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Definitions

  • the invention relates to the field of sound and electricity, and in particular to a manufacturing method of a magnetic circuit system.
  • the manufacturing method of the related art magnetic circuit system uses traditional technology to make the magnetic steel and the magnetic conductive plate, and then uses glue and other materials to assemble and combine the magnetic steel and the magnetic conductive plate to form a magnetic circuit.
  • the magnetic circuit will inevitably have assembly errors, and the magnetic circuit is a micro-miniature structure, so the assembly errors will lead to poor dimensional effects of the entire magnetic circuit.
  • the purpose of the present invention is to provide a method for manufacturing a magnetic circuit system with a better size.
  • the present invention provides a manufacturing method of a magnetic circuit system, which is characterized in that the method includes the following steps:
  • the other component of the first magnetic conductive plate and the magnetic steel is formed on the manufactured component by using a powder metallurgy process.
  • the method includes the following steps:
  • the magnetic steel is made on the first magnetic conductive plate by a powder metallurgy process.
  • the magnetic steel includes a main magnetic steel and a secondary magnetic steel arranged around the main magnetic steel.
  • the method further includes: using a powder metallurgy process to make a second magnetic conductive plate on the side of the magnetic steel away from the first magnetic conductive plate.
  • the method includes the following steps:
  • the magnetic steel is made by powder metallurgy technology
  • the first magnetic conductive plate is made on one side of the magnetic steel by using a powder metallurgy process.
  • the magnetic steel includes a main magnetic steel fixed to the first magnetic conductive plate and a secondary magnetic steel arranged around the main magnetic steel.
  • the method further includes: using a powder metallurgy process to form a second magnetic conductive plate on the side of the magnetic steel away from the first magnetic conductive plate.
  • the manufacturing method of the magnetic circuit system of the present invention uses powder metallurgy technology to make the magnetic circuit system, so that the magnetic circuit system is integrated, and the influence of glue on the product performance is avoided.
  • the size of the magnetic circuit system is Better, no assembly error, better reliability.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the magnetic circuit system of the present invention.
  • Figure 2 is a schematic flow chart of the manufacturing method of the magnetic circuit system of the present invention.
  • Figure 3 is a schematic flow diagram of a specific manufacturing method of the magnetic circuit system of the present invention.
  • Fig. 4 is a schematic flow diagram of another specific manufacturing method of the magnetic circuit system of the present invention.
  • the present invention provides a manufacturing method of a magnetic circuit system, which includes the following steps:
  • the other component of the first magnetic conductive plate and the magnetic steel is formed on the manufactured component by using a powder metallurgy process.
  • the magnetic circuit system made by the above method has better size, no assembly error, and better reliability.
  • the present invention provides a manufacturing method of a magnetic circuit system 100, which includes the following steps:
  • the magnetic steel 2 is made on the first magnetic steel plate 1 by powder metallurgy process; specifically, when the magnetic steel 2 is made, the main magnetic steel is made on the first magnetic steel plate 1 by the powder metallurgy process. Steel 21 and a secondary magnet 22 arranged around the main magnet 21.
  • a second magnetic conductive plate 3 is made on the side of the magnetic steel 2 away from the first magnetic conductive plate 1 by powder metallurgy process; specifically, a second magnetic conductive plate 3 is made on the main magnetic steel 21 Magnetic board 3.
  • the magnetic circuit system 100 manufactured by the above-mentioned manufacturing method of the magnetic circuit system 100 does not require assembly, has excellent size, and does not require glue, which avoids the effect of glue on the performance of the magnetic circuit system 100 and has better performance; of course, it is not necessary.
  • the second magnetic conductive plate is manufactured, and the magnetic circuit system at this time is used in the sound generating device that does not require the second magnetic conductive plate.
  • the present invention also provides another method for manufacturing the magnetic circuit system 100.
  • the method is manufactured by powder metallurgy and includes the following steps:
  • the magnetic steel 2 is made by the powder metallurgy process; specifically, when the magnetic steel 2 is made, the powder metallurgy process is used to make the main magnetic steel 21 and the auxiliary magnetic steel 22 arranged around the main magnetic steel.
  • the first magnetic steel plate 1 is made on one side of the magnetic steel 2; specifically, the first magnetic steel plate 1 is made on the main magnetic steel 21 and the auxiliary magnetic steel 22 by the powder metallurgy technology. Board 1.
  • a second magnetic conductive plate 3 is made on the side of the magnetic steel 2 away from the first magnetic conductive plate 1; specifically, a second magnetic conductive plate 3 is made on the main magnetic steel 21 Magnetic board 3.
  • the magnetic circuit system 100 manufactured by the above-mentioned manufacturing method of the magnetic circuit system 100 does not require assembly, has excellent dimensions, and does not require glue, which avoids the influence of glue on the performance of the magnetic circuit system 100 and has better performance; of course; It is also not necessary to make the second magnetic conductive plate, and the magnetic circuit system at this time is used in the sound generating device that does not require the second magnetic conductive plate.
  • the manufacturing method of the magnetic circuit system 100 of the present invention is not limited to the above-mentioned method.
  • the second magnetic conductive plate 3 can be made by powder metallurgy technology, and then the magnetic steel 2 can be made on the second magnetic conductive plate 3, and finally the magnetic steel The side of the steel 2 away from the second magnetic conductive plate 13 is made into the first magnetic conductive plate 1.
  • the manufacturing method of the magnetic circuit system 100 of the present invention can also first make some parts according to the traditional process, and then use the powder metallurgy process to make the remaining parts in the form of an insert; Powder metallurgy process on the plate to make magnetic steel; or powder metallurgy process on the magnetic steel made by traditional process to make the first magnetic conductive plate; both of these methods are feasible, and the magnetic circuit system made The size is better.
  • the traditional process and the powder metallurgy process are combined, which can take into account the cost and size issues.
  • the manufacturing method of the magnetic circuit system of the present invention uses powder metallurgy to make the magnetic circuit system, which integrates the magnetic circuit system, avoids the effect of glue on the product performance, and makes the magnetic circuit system larger in size. Excellent, no assembly error, better reliability.
  • the present invention provides an embodiment of the present invention described above, which does not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made using the content of the description and drawings of the present invention, or direct or indirect use In other related technical fields, the same is included in the scope of patent protection of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un système de circuit magnétique. Le procédé comprend les étapes suivantes consistant à : fabriquer un premier élément parmi une première plaque de flux de concentration et un acier magnétique en utilisant un processus de métallurgie des poudres ; et fabriquer l'autre élément parmi la première plaque de flux de concentration et l'acier magnétique sur l'ensemble fabriqué en utilisant le processus de métallurgie des poudres. Comparé à l'art antérieur, le procédé de fabrication du système de circuit magnétique a pour avantages que le système de circuit magnétique est fabriqué en utilisant le processus de métallurgie des poudres et est intégré. De plus, l'impact de la colle sur les performances du produit est évité. En outre, le système de circuit magnétique fabriqué a une taille améliorée, ne comporte aucune erreur d'assemblage et présente une plus grande fiabilité.
PCT/CN2020/078087 2019-12-11 2020-03-06 Procédé de fabrication d'un système de circuit magnétique WO2021114498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911263759.8 2019-12-11
CN201911263759.8A CN111031466A (zh) 2019-12-11 2019-12-11 磁路系统的制作方法

Publications (1)

Publication Number Publication Date
WO2021114498A1 true WO2021114498A1 (fr) 2021-06-17

Family

ID=70205544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/078087 WO2021114498A1 (fr) 2019-12-11 2020-03-06 Procédé de fabrication d'un système de circuit magnétique

Country Status (2)

Country Link
CN (1) CN111031466A (fr)
WO (1) WO2021114498A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021114124A1 (fr) * 2019-12-11 2021-06-17 瑞声声学科技(深圳)有限公司 Procédé de fabrication d'un système de circuit magnétique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07176427A (ja) * 1993-11-10 1995-07-14 Matsushita Electric Ind Co Ltd マイクロスピーカ用磁気回路ユニットとその製造方法
US20140348374A1 (en) * 2012-03-19 2014-11-27 Panasonic Corporation Magnetic circuit for loudspeaker, and loudspeaker using same
CN104196647A (zh) * 2014-08-18 2014-12-10 宁波华斯特林电机制造有限公司 一种高精度的斯特林循环机的导磁结构
CN206775735U (zh) * 2017-05-26 2017-12-19 歌尔科技有限公司 一种发声器
CN108184196A (zh) * 2018-01-08 2018-06-19 深圳市韶音科技有限公司 一种骨传导扬声器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04287498A (ja) * 1991-03-15 1992-10-13 Yamaha Corp 音響機器用振動板
CN204887405U (zh) * 2015-07-28 2015-12-16 歌尔声学股份有限公司 扬声器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07176427A (ja) * 1993-11-10 1995-07-14 Matsushita Electric Ind Co Ltd マイクロスピーカ用磁気回路ユニットとその製造方法
US20140348374A1 (en) * 2012-03-19 2014-11-27 Panasonic Corporation Magnetic circuit for loudspeaker, and loudspeaker using same
CN104196647A (zh) * 2014-08-18 2014-12-10 宁波华斯特林电机制造有限公司 一种高精度的斯特林循环机的导磁结构
CN206775735U (zh) * 2017-05-26 2017-12-19 歌尔科技有限公司 一种发声器
CN108184196A (zh) * 2018-01-08 2018-06-19 深圳市韶音科技有限公司 一种骨传导扬声器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHANG, JIAN ET AL.: "Application of Powder Injection Molding in Permanent Magnetic Materials", MATERIALS SCIENCE AND ENGINEERING OF POWDER METALLURGY, vol. 8, no. 2, 15 May 2003 (2003-05-15), pages 209 - 215, XP055821101 *

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