CN108600932B - Moving coil, manufacturing method thereof and loudspeaker - Google Patents
Moving coil, manufacturing method thereof and loudspeaker Download PDFInfo
- Publication number
- CN108600932B CN108600932B CN201810269594.4A CN201810269594A CN108600932B CN 108600932 B CN108600932 B CN 108600932B CN 201810269594 A CN201810269594 A CN 201810269594A CN 108600932 B CN108600932 B CN 108600932B
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- Prior art keywords
- main body
- bending
- coil
- fpc
- moving coil
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000005452 bending Methods 0.000 claims abstract description 68
- 239000004020 conductor Substances 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000001465 metallisation Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H04R31/006—Interconnection of transducer parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention provides a moving coil, a manufacturing method thereof and a loudspeaker, wherein the moving coil comprises an FPC (flexible printed circuit), the FPC comprises an FPC substrate and conductors, the FPC comprises a main body part and a plurality of bending parts, the bending parts bend towards one side of the main body part, the conductors are arranged on the bending parts, the conductors on two adjacent bending parts are mutually communicated, the communicated conductors form a coil, one end of the coil is communicated with a second bonding pad, and the other end of the coil is communicated with a first bonding pad. The loudspeaker comprises a basin frame and a magnetic circuit system, wherein the magnetic circuit system comprises a magnetic gap and further comprises the moving coil, and the bending part is positioned in the magnetic gap. Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that: the FPC is used for replacing the voice coil and the dome, the manufacturing process is simpler, the production efficiency is high, and the condition of broken voice coil connection wire can not occur under high power.
Description
Technical Field
The invention relates to the technical field of electroacoustic technology.
In particular to a moving coil, a manufacturing method thereof and a loudspeaker.
Background
A voice coil is arranged in a traditional miniature loudspeaker, the voice coil is positioned in a magnetic gap, a diaphragm is bonded on the voice coil, the other end of the diaphragm is bonded on a basin frame, and in order to improve acoustic performance, a spherical top with high rigidity is bonded on the diaphragm. The voice coil loudspeaker voice coil is realized through certain mode and is linked together with external power supply system, under the condition of circular telegram, the magnetic field can exert driving force to the voice coil loudspeaker voice coil, makes it drive vibrating diaphragm vibration compressed air sound production from top to bottom.
The existing voice coil is generally formed by winding enamelled wires such as enamelled oxygen-free copper wires, copper-clad aluminum wires, pure aluminum wires and the like, voice coil connecting wires with certain lengths are reserved in the voice coil, the voice coil connecting wires are welded on inner bonding pads of products, and the inner bonding pads are conducted with outer bonding pads to achieve electric connection. The problem of broken wires can occur in the voice coil connection under high power, and the improvement of the power of products is severely limited. Moreover, the voice coil is adhered with the diaphragm, the diaphragm is adhered with the dome, the process is complex, and the production efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a moving coil, a manufacturing method thereof and a loudspeaker, which simplify the process and improve the reliability of the product.
The aim of the invention is achieved by the following technical measures:
the moving coil comprises an FPC (flexible printed circuit), wherein the FPC comprises an FPC substrate and conductors, the FPC comprises a main body part and a plurality of bending parts, the bending parts bend towards one side of the main body part, the conductors are arranged on the bending parts, the conductors on two adjacent bending parts are mutually communicated, the communicated conductors form a coil, one end of the coil is communicated with a second bonding pad, and the other end of the coil is communicated with a first bonding pad.
As an improvement: the FPC substrate further comprises a plurality of connecting portions, the second bonding pads are arranged on the connecting portions, and the first metalized holes and the first bonding pads are arranged on the connecting portions.
As an improvement: the connecting part is arranged between two adjacent bending parts.
As an improvement: the connecting portion comprises a buffer section, and the section of the buffer section is in a sawtooth shape or a wave shape or an arc shape.
As an improvement: the shape of the main body part is polygonal, and the edges of the main body part are arranged in one-to-one correspondence with the bending parts.
As an improvement: the conductor end portion extends to a side close to the main body portion, and a portion of the conductor extending to the side close to the main body portion is used for communicating with a conductor or a second bonding pad or a first bonding pad on an adjacent bending portion.
As an improvement: the conductor is a metal foil.
As an improvement: the first welding pad is communicated with a first metallization hole, the first metallization hole is communicated with a second metallization hole, and the other end of the coil is connected with the second metallization hole.
As an improvement: the number of layers of conductors on each bending part is at least two, and the FPC substrate is positioned between two adjacent layers of conductors.
The manufacturing method of the moving coil comprises the following steps:
s1, manufacturing a flexible circuit board with the main body part, the bending part, the conductor, the first metalized hole and the second metalized hole;
s2, bending the bending part towards one side of the main body part.
The loudspeaker comprises a basin frame and a magnetic circuit system, wherein the magnetic circuit system comprises a magnetic gap and further comprises the moving coil, and the bending part is positioned in the magnetic gap.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that: the FPC is used for replacing the voice coil and the dome, the manufacturing process is simpler, the production efficiency is high, and the condition of broken voice coil connection wire can not occur under high power.
The invention is further described below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic view of a moving coil according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of the structure of section A-A in fig. 1.
Fig. 3 is a schematic structural view of a connecting portion in a moving coil according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of a moving coil after being unfolded in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of a connecting portion in a moving coil according to embodiment 2 of the present invention.
Fig. 6 is a schematic structural view of a connecting portion in a moving coil according to embodiment 3 of the present invention.
Fig. 7 is a schematic structural view of a speaker according to the present invention.
Fig. 8 is a schematic diagram of a moving coil and a frame in a speaker according to the present invention.
Fig. 9 is a schematic diagram of a speaker in the background art.
In the figure: 1-a main body part; a 2-connection; 3-bending part; 4-a first bonding pad; 5-a first metallized hole; 6-a second bonding pad; 7-a second metallized hole; 8-conductors; 9-an FPC substrate layer; 10-buffer section; 11-basin stand; 12-a membrane; 13-magnetic gap; 14-dome; 15-voice coil.
Detailed Description
A loudspeaker in the background art, as shown in figure 9, comprises a basin frame 11 and a magnetic circuit system, wherein the magnetic circuit system comprises a magnetic gap 13, a voice coil 15 is arranged in the magnetic gap 13, a diaphragm 12 is bonded on the voice coil 15, the other end of the diaphragm 12 is bonded on the basin frame 11, and a rigid dome 14 is bonded on the voice coil 15.
Example 1: as shown in fig. 1 and 2, the moving coil comprises an FPC, wherein the FPC comprises three layers of FPC substrates 9 and two layers of conductors 8, and the FPC substrates 9 are made of polyimide or polyester films.
The FPC includes a main body portion 1, four bent portions 3 and four connection portions 2,
specifically, the main body 1 is rectangular in shape, and the main body 1 is provided with a second metalized hole 7. The bending part 3 is arranged at the edge of the main body part 1, the shape of the bending part 3 is rectangular, and four bending parts 3 are arranged in one-to-one correspondence with four sides of the main body part 1. The bending part 3 is bent to one side of the main body part 1, and the bending part 3 is arranged perpendicular to the main body part 1.
As shown in fig. 3, the connecting portion 2 is in a strip shape, and the connecting portion 2 is disposed between two adjacent bending portions 3. The connecting portions 2 are alternately arranged with the bending portions 3. The connecting part 2 comprises a buffer section 10, and the section shape of the buffer section 10 is saw-tooth. The connecting portion 2 supports the main body portion 1 and the bent portion 3.
The end part of one connecting part 2 is provided with a second bonding pad 6, the end part of the other connecting part 2 is provided with a first bonding pad 4, the first bonding pad 4 is provided with a first metallization hole 5, and the first metallization hole 5 is communicated with a second metallization hole 7.
As shown in fig. 4, the conductor 8 is disposed on the bending portion 3, the conductor 8 is disposed parallel to the edge of the main body portion 1, the conductor 8 is copper foil, and the conductor 8 is located between two adjacent FPC substrates 9. The conductors 8 on the adjacent two bending parts 3 are mutually communicated, and the communicated conductors 8 form a coil.
Specifically, the end of the conductor 8 extends to the side close to the main body 1.
The portion of the conductor 8 constituting the coil middle section extending to the side close to the main body portion 1 is used for communicating with the conductor 8 on the adjacent bent portion 3; a conductor 8 constituting one end of the coil communicates with the second pad 6; the conductor 8 constituting the other end of the coil communicates with the second metallized hole 7.
Example 2: the moving coil comprises an FPC, wherein the FPC comprises a layer of FPC substrate 9 and two layers of conductors 8, and the FPC substrate 9 is made of polyimide or polyester film.
The FPC base material 9 includes a main body portion 1, three bending portions 3, and three connecting portions 2.
Specifically, the main body 1 is triangular, and the main body 1 is provided with a second metalized hole 7. The bending part 3 is arranged at the edge of the main body part 1, the shape of the bending part 3 is rectangular, and three bending parts 3 are arranged in one-to-one correspondence with three sides of the main body part 1. The bending part 3 is bent to one side of the main body part 1, and the bending part 3 is arranged perpendicular to the main body part 1.
As shown in fig. 5, the connecting portion 2 is in a strip shape, and the connecting portion 2 is disposed between two adjacent bending portions 3. The connecting portions 2 are alternately arranged with the bending portions 3. The connecting part 2 comprises a buffer section 10, and the section shape of the buffer section 10 is wavy.
The end part of one connecting part 2 is provided with a second bonding pad 6, the end part of the other connecting part 2 is provided with a first bonding pad 4, the first bonding pad 4 is provided with a first metallization hole 5, and the first metallization hole 5 is communicated with a second metallization hole 7.
The conductor 8 is disposed on the bending portion 3, the conductor 8 is disposed parallel to the edge of the main body portion 1, and the conductor 8 is copper foil. One layer of conductor 8 is positioned on the inner side of the FPC substrate 9, and the other layer of conductor 8 is positioned on the outer side of the FPC substrate 9. The conductors 8 on the adjacent two bending parts 3 are mutually communicated, and the communicated conductors 8 form a coil. One end of the coil is communicated with the second bonding pad 6; the other end of the coil communicates with a second metallized hole 7.
The remaining features of this embodiment are the same as those of embodiment 1.
Example 3: the moving coil comprises an FPC, wherein the FPC comprises four layers of FPC base materials 9 and three layers of conductors 8, and the FPC base materials 9 are made of polyimide or polyester films.
The FPC base material 9 includes a main body portion 1, five bending portions 3 and five connecting portions 2,
specifically, the main body 1 is pentagonal, and the main body 1 is provided with a second metalized hole 7. The bending part 3 is arranged at the edge of the main body part 1, the shape of the bending part 3 is rectangular, and five bending parts 3 are arranged in one-to-one correspondence with five sides of the main body part 1. The bending part 3 is bent to one side of the main body part 1, and the bending part 3 is arranged perpendicular to the main body part 1.
As shown in fig. 6, the connecting portion 2 is in a strip shape, and the connecting portion 2 is disposed between two adjacent bending portions 3. The connecting portions 2 are alternately arranged with the bending portions 3. The connecting part 2 comprises a buffer section 10, and the section shape of the buffer section 10 is arc-shaped.
The end part of one connecting part 2 is provided with a second bonding pad 6, the end part of the other connecting part 2 is provided with a first bonding pad 4, the first bonding pad 4 is provided with a first metallization hole 5, and the first metallization hole 5 is communicated with a second metallization hole 7.
The conductor 8 is disposed on the bending portion 3, the conductor 8 is disposed parallel to the edge of the main body portion 1, and the conductor 8 is copper foil. The conductors 8 are located between two adjacent pieces of FPC substrate 9. The conductors 8 on the adjacent two bending parts 3 are mutually communicated, and the communicated conductors 8 form a coil. One end of the coil is communicated with the second bonding pad 6; the other end of the coil communicates with a second metallized hole 7.
The remaining features of this embodiment are the same as those of embodiment 1.
Example 4: a loudspeaker comprising a moving coil as described in one of embodiments 1 to 3, which is described here by way of example as comprising a moving coil as described in embodiment 1.
As shown in fig. 7 and 8, the basin frame 11 and the magnetic circuit system are further included, the basin frame 11 is rectangular in shape, the magnetic circuit system includes a magnetic gap 13, the bending part 3 is located in the magnetic gap 13, and the four connecting parts 2 are respectively bonded with the basin frame 11. The first pad 4 and the second pad 6 are connected to a speaker control circuit. The body 1 is adhered with a membrane 12, and the other end of the membrane 12 is adhered to the basin frame 11.
The four connecting parts 2 are adhered to the basin frame 11, so that the structure is symmetrical, the support is strong, unbalanced vibration of the diaphragm 12 can not occur any more, and the performance and reliability allowance of the product are increased.
Example 5: the moving coil manufacturing method, taking the moving coil described in the embodiment 1 as an example, includes the following steps:
s1, manufacturing a flexible circuit board, wherein the flexible circuit board is provided with a main body part 1, a connecting part 2, a bending part 3, a conductor 8, a first metallization hole 5 and a second metallization hole 7, and when the flexible circuit board is manufactured, a first bonding pad 4 and a second bonding pad 6 are manufactured together;
s2, bending the bending part 3 towards one side of the main body part 1, so that the bending part 3 is perpendicular to the main body part 1;
s3, bending the connecting part 2, and manufacturing a zigzag buffer section 10 on the connecting part 2.
It should be noted that other materials, such as silver, gold, etc., may be used for the conductor 8. The shape of the main body 1 may be hexagonal or other polygonal. The number of the conductors 8 in the bending part 3 can be increased by three layers or four layers.
The foregoing describes several embodiments of the present invention in detail, but the description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (9)
1. Moving coil, its characterized in that: the flexible printed circuit board comprises an FPC, wherein the FPC comprises an FPC substrate and conductors (8), the FPC comprises a main body part (1) and a plurality of bending parts (3), the bending parts (3) are bent towards one side of the main body part (1), the conductors (8) are arranged on the bending parts (3), the conductors (8) on two adjacent bending parts (3) are mutually communicated, the communicated conductors (8) form a coil, one end of the coil is communicated with a second bonding pad (6), and the other end of the coil is communicated with a first bonding pad (4);
the FPC substrate further comprises a plurality of connecting parts (2), wherein the connecting parts (2) are arranged between two adjacent bending parts (3), the connecting parts (2) and the bending parts (3) are alternately arranged, and the connecting parts (2) support the main body part (1) and the bending parts (3);
the second bonding pad (6) is arranged at the end part of one connecting part (2), and the first bonding pad (4) is arranged at the end part of the other connecting part (2).
2. The moving coil of claim 1, wherein: the first bonding pad (4) is provided with a first metallization hole (5).
3. The moving coil of claim 2, wherein: the connecting part (2) comprises a buffer section (16), and the section shape of the buffer section (16) is saw-tooth-shaped or wavy or arc-shaped.
4. The moving coil of claim 1, wherein: the main body part (1) is polygonal in shape, and the edges of the main body part (1) are arranged in one-to-one correspondence with the bending parts (3).
5. The moving coil of claim 1, wherein: the end of the conductor (8) extends to the side close to the main body part (1), and the part of the conductor (8) extending to the side close to the main body part (1) is used for communicating with the conductor (8) or the second bonding pad (6) or the first bonding pad (4) on the adjacent bending part (3).
6. The moving coil of claim 1, wherein: the first welding pad (4) is communicated with the first metallization hole (5), the first metallization hole (5) is communicated with the second metallization hole (7), and the other end of the coil is connected with the second metallization hole (7).
7. Moving coil according to one of claims 1 to 6, characterized in that: the number of layers of the conductors (8) on each bending part (3) is at least two, and the FPC base material is positioned between two adjacent layers of conductors (8).
8. The manufacturing method of the moving coil is characterized in that: the method comprises the following steps:
s1, manufacturing a flexible circuit board with the main body part (1), the bending part (3), the conductor (8), the first metalized hole (5) and the second metalized hole (7) according to the claim 1;
s2, bending the bending part (3) towards one side of the main body part (1).
9. The loudspeaker comprises a basin frame (11) and a magnetic circuit system, wherein the magnetic circuit system comprises a magnetic gap (13), and is characterized in that: the moving coil assembly further comprises a moving coil according to claim 1, wherein the bending part (3) is positioned in the magnetic gap (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810269594.4A CN108600932B (en) | 2018-03-29 | 2018-03-29 | Moving coil, manufacturing method thereof and loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810269594.4A CN108600932B (en) | 2018-03-29 | 2018-03-29 | Moving coil, manufacturing method thereof and loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108600932A CN108600932A (en) | 2018-09-28 |
| CN108600932B true CN108600932B (en) | 2023-12-08 |
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ID=63625017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810269594.4A Active CN108600932B (en) | 2018-03-29 | 2018-03-29 | Moving coil, manufacturing method thereof and loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108600932B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9614396D0 (en) * | 1996-07-09 | 1996-09-04 | B & W Loudspeakers | Coil formers for loudspeaker drive units |
| JP2000059888A (en) * | 1998-08-04 | 2000-02-25 | Foster Electric Co Ltd | Speaker |
| CN1672461A (en) * | 2002-07-25 | 2005-09-21 | 桑尼昂霍森斯公司 | One-magnet rectangular transducer |
| KR20060017324A (en) * | 2004-08-20 | 2006-02-23 | 최기정 | A structure of speaker |
| JP2008113368A (en) * | 2006-10-31 | 2008-05-15 | Fps:Kk | Planar acoustic transducer and method of manufacturing same |
| WO2011007403A1 (en) * | 2009-07-13 | 2011-01-20 | 三菱電機エンジニアリング株式会社 | Electromagnetic converter |
| CN206865734U (en) * | 2017-05-18 | 2018-01-09 | 江西联创宏声电子股份有限公司 | Speaker vibration system |
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| CN207978121U (en) * | 2018-03-29 | 2018-10-16 | 山东共达电声股份有限公司 | Moving-coil structure and loud speaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030174856A1 (en) * | 2002-01-25 | 2003-09-18 | Leif Johannsen | Flexible diaphragm with integrated coil |
| JP4444728B2 (en) * | 2004-05-11 | 2010-03-31 | スター精密株式会社 | Electroacoustic transducer |
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| Publication number | Publication date |
|---|---|
| CN108600932A (en) | 2018-09-28 |
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