CN107172547A - Voice coil loudspeaker voice coil winding method and vibration component and the acoustical generator provided with the vibration component - Google Patents
Voice coil loudspeaker voice coil winding method and vibration component and the acoustical generator provided with the vibration component Download PDFInfo
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- CN107172547A CN107172547A CN201710386279.5A CN201710386279A CN107172547A CN 107172547 A CN107172547 A CN 107172547A CN 201710386279 A CN201710386279 A CN 201710386279A CN 107172547 A CN107172547 A CN 107172547A
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- voice coil
- vibration component
- coiling
- oscillating plate
- coil loudspeaker
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- 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
- H04R9/06—Loudspeakers
-
- 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
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a kind of voice coil loudspeaker voice coil winding method and vibration component and the acoustical generator provided with the vibration component, voice coil loudspeaker voice coil winding method, in the side of oscillating plate, the ring winding boss of protrusion is set, voice coil line is wound on to the outside of the coiling boss, the voice coil line is heated, directly it is bonded on the oscillating plate so that the glue-line of the voice coil line melts, the voice coil loudspeaker voice coil after the completion of coiling is directly combined as a whole with the oscillating plate.Voice coil loudspeaker voice coil winding method and vibration component and the acoustical generator provided with the vibration component of the present invention solve the technical problem of acoustical generator packaging technology complexity etc. in the prior art, voice coil loudspeaker voice coil winding method and vibration component of the present invention and acoustical generator provided with the vibration component are simple for assembly process, and packaging efficiency is high；Product concentricity is high, and uniformity is good, and acoustical behavior is high.
Description
Technical field
The present invention relates to electro-acoustic product technical field, more particularly to a kind of voice coil loudspeaker voice coil winding method and vibration component and provided with this
The acoustical generator of vibration component.
Background technology
Acoustical generator is the important acoustic element of portable electric appts, for completing turning between electric signal and voice signal
Change, be a kind of energy conversion device.Acoustical generator generally includes shell and the vibration component being housed in shell and magnetic circuit component, shakes
Dynamic component generally includes vibrating diaphragm, oscillating plate and voice coil loudspeaker voice coil.At present, voice coil loudspeaker voice coil is formed by voice coil line coiling, and conventional voice coil line is band
There is the enamel-covered wire of glue-line.Shaken when carrying out acoustical generator assembling, it is necessary to be adhesively fixed on the voice coil loudspeaker voice coil that prior coiling shapes with glue
On film or oscillating plate, while it is not easy positioning when being bonded voice coil loudspeaker voice coil, so that cause the vibration component concentricity after bonding poor, uniformity
Difference, and then influence the acoustical behavior of acoustical generator.
The content of the invention
For disadvantages described above, first technical problem to be solved by this invention is to provide a kind of voice coil loudspeaker voice coil winding method, this
Voice coil loudspeaker voice coil winding method technique is simple, voice coil loudspeaker voice coil can be combined as a whole with oscillating plate while coiling voice coil loudspeaker voice coil, can simplify hair
The assembling procedure of sound device, and the concentricity of voice coil loudspeaker voice coil and oscillating plate is high, good product consistency.
Based on same inventive concept, second technical problem to be solved by this invention is to provide a kind of vibration component, this
The assembling procedure of vibration component is simple, and concentricity is high, and uniformity is good.
Based on same inventive concept, the 3rd technical problem to be solved by this invention is to provide a kind of acoustical generator, this hair
The assembling procedure of sound device is simple, and good product consistency, and acoustical behavior is high.
To solve above-mentioned first technical problem, the technical scheme is that：
A kind of voice coil loudspeaker voice coil winding method, sets the ring winding boss of protrusion in the side of oscillating plate, voice coil line is wound on
The outside of the coiling boss, is heated to the voice coil line so that the glue-line of the voice coil line, which melts, is directly bonded in institute
State on oscillating plate, the voice coil loudspeaker voice coil after the completion of coiling is directly combined as a whole with the oscillating plate.
Wherein, if the height of the coiling boss is less than the height of the voice coil loudspeaker voice coil, need to increase at the coiling boss
If wire winding tool, the outer surface of the wire winding tool is flushed with the inner surface or outer surface of the coiling boss, grows institute
The voice coil line for stating the voice coil loudspeaker voice coil of coiling boss is wound on the wire winding tool.
Wherein, the voice coil line is heated by the way of blowing hot-air, and while the voice coil line coiling pair
The voice coil line blowing hot-air.
To solve above-mentioned second technical problem, the technical scheme is that：
It is provided with the downside of a kind of vibration component, including vibrating diaphragm, oscillating plate and the voice coil loudspeaker voice coil being combined together, the oscillating plate
Downwardly convex ring winding boss, the voice coil loudspeaker voice coil be wound on the outside of the coiling boss and the glue-line by itself with it is described
It is bonded as one on the downside of coiling boss and the oscillating plate.
Wherein, the inner surface of the voice coil loudspeaker voice coil is flushed with the outer surface of the coiling boss.
Wherein, the outer surface of the voice coil loudspeaker voice coil be planar structure or be concave and downward convex hierarchic structure.
Wherein, the height of the coiling boss be less than the voice coil loudspeaker voice coil height, the inner surface of the voice coil loudspeaker voice coil with it is described around
The inner surface of line boss is flushed, and the outer surface of the voice coil loudspeaker voice coil is planar structure.
Wherein, the material of the oscillating plate is high molecule plastic or light-weight metal.
Wherein, when the material of the oscillating plate is high molecule plastic, the oscillating plate is molded by Shooting Technique；Work as institute
When the material for stating oscillating plate is light-weight metal, the oscillating plate is molded by powder metallurgical technique.
In order to solve above-mentioned 3rd technical problem, the technical scheme is that：
A kind of acoustical generator, including shell and the vibration component and magnetic circuit component that are housed in the shell, the vibration group
Part is above-mentioned vibration component.
Employ after above-mentioned technical proposal, the beneficial effects of the invention are as follows：
It is because voice coil loudspeaker voice coil winding method of the present invention is that the coiling boss of annular is set in the side of oscillating plate, voice coil line is direct
The outside of coiling boss is wound on, and voice coil line is heated so that the glue-line of voice coil line, which melts, is directly bonded in oscillating plate
On, voice coil loudspeaker voice coil is directly combined as a whole with oscillating plate after the completion of coiling.This method can while voice coil loudspeaker voice coil coiling just by voice coil loudspeaker voice coil with
Oscillating plate is combined as a whole, so as to no longer need, by the voice coil loudspeaker voice coil process mutually be bonded with vibration plate, to simplify production when acoustical generator is assembled
The packaging technology of product；The coiling boss on oscillating plate can be molded by plant equipment batch machining simultaneously, product with stable quality, one
Cause property is good, so that the concentricity between voice coil loudspeaker voice coil accurate positioning, with oscillating plate is high, good product consistency, and then be conducive to improving hair
The acoustical behavior of sound device.
Because the oscillating plate of vibration component of the present invention is provided with coiling boss, voice coil line is directly wound on the outer of coiling boss
Side, and be bonded as one by the glue-line and oscillating plate of itself, so as to simplify the packaging technology of vibration component, improve assembling
Efficiency；Uniformity simultaneously between voice coil loudspeaker voice coil and oscillating plate is good, is conducive to improving the acoustical behavior of acoustical generator.
Because acoustical generator of the present invention is provided with above-mentioned vibration component, so that simple for assembly process, packaging efficiency is high；Product is same
Heart degree is high, and uniformity is good, and acoustical behavior is high.
In summary, voice coil loudspeaker voice coil winding method and vibration component and the acoustical generator provided with the vibration component of the present invention solve existing
There is a technical problem of acoustical generator packaging technology complexity etc. in technology, voice coil loudspeaker voice coil winding method and vibration component of the present invention and shaken provided with this
The acoustical generator of dynamic component is simple for assembly process, and packaging efficiency is high；Product concentricity is high, and uniformity is good, and acoustical behavior is high.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the voice coil loudspeaker voice coil winding method of the embodiment of the present invention one；
Fig. 2 is another schematic diagram of the voice coil loudspeaker voice coil winding method of the embodiment of the present invention one；
Fig. 3 is the structural representation of the vibration component of the embodiment of the present invention two；
Fig. 4 is the structural representation of the vibration component of the embodiment of the present invention three；
Fig. 5 is the structural representation of the vibration component of the embodiment of the present invention four；
Fig. 6 is the structural representation of the vibration component of the embodiment of the present invention five；
Fig. 7 is the structural representation of the vibration component of the embodiment of the present invention six；
Fig. 8 is the structural representation of the vibration component of the embodiment of the present invention seven；
In figure：10th, oscillating plate, 12, coiling boss, 20a, voice coil loudspeaker voice coil, 20b, voice coil loudspeaker voice coil, 20c, voice coil loudspeaker voice coil, 20d, voice coil loudspeaker voice coil, 20e, sound
Circle, 20f, voice coil loudspeaker voice coil, 30a, wire winding tool, 30b, wire winding tool.
Embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.
The interior finger being related in this specification is close to the position at acoustical generator center, position of the outer finger away from acoustical generator center；
Refer on the direction being related to and refer to the direction provided with magnetic circuit component under the direction provided with vibration component, direction.
Embodiment one：
As Fig. 1 and Fig. 2 jointly shown in, a kind of voice coil loudspeaker voice coil winding method, oscillating plate 10 side set protrusion annular around
Voice coil line, is wound on the outside of coiling boss 12 by line boss 12 based on coiling boss 12, while being added to voice coil line
Heat so that its glue-line melts, and is directly bonded on oscillating plate 10, so that the voice coil loudspeaker voice coil after coiling can be combined directly with oscillating plate 10
It is integrated, the process for being bonded the two can be saved.Carried out in present embodiment by the way of to voice coil line blowing hot-air
Heating, blowing hot-air while during voice coil line coiling in coiling, so as to which voice coil loudspeaker voice coil is mutually fixed with oscillating plate 10 well.
As shown in Figure 1, Figure 2, Fig. 7 and Fig. 8 are jointly shown, can be by sound if the height of coiling boss 12 is more than the height of voice coil loudspeaker voice coil
Astragal is directly wound on coiling boss 12, it is not necessary to by any frock.If the height of coiling boss 12 is less than the height of voice coil loudspeaker voice coil
Degree, then need, by a wire winding tool being adapted with the inner shape and size of coiling boss 12, voice coil loudspeaker voice coil to be grown into coiling convex
The voice coil line coiling of the part of platform 12 is on wire winding tool, and coiling again takes out frock after terminating.
As shown in figure 1, when the height of coiling boss 12 is less than the height of voice coil loudspeaker voice coil, if thinking the inner surface of the voice coil loudspeaker voice coil of coiling
For planar structure, when outer surface is also planar structure or is the hierarchic structure of concave and downward convex, wire winding tool 30a should be designed to outer
The structure that surface is flushed with the outer surface of coiling boss 12, while wire winding tool 30a is combined with oscillating plate 10 for convenience, then should
In the wire winding tool 30a annular groove that is adapted with coiling boss 12 of upper end-face edge position design one, so as to by wire winding tool
30a is combined with oscillating plate 10, and wire winding tool 30a outer surface of the outer surface also with coiling boss is flushed.
As shown in Fig. 2 when the height of coiling boss is less than the height of voice coil loudspeaker voice coil, if thinking, the voice coil loudspeaker voice coil outer surface of coiling is flat
Face structure, inner surface be concave and downward convex hierarchic structure when, it is only necessary to by wire winding tool 30b be designed to shape and size with around
The straight cylinder being adapted on the inside of line boss, around the voice coil loudspeaker voice coil made i.e. as shown in the voice coil loudspeaker voice coil 20b in Fig. 2.
As shown in Figure 7 and Figure 8, then need not be around when the height of coiling boss is equal to or more than the height of voice coil loudspeaker voice coil
Line frock, can only be now the voice coil loudspeaker voice coil that inner surface is planar structure around the voice coil loudspeaker voice coil made.
Embodiment two：
As shown in figure 3, a kind of vibration component, including vibrating diaphragm (not shown), oscillating plate 10 and the sound being combined together
20a is enclosed, the lower section of oscillating plate 10 is provided with downwardly convex annular coiling boss 12, and voice coil loudspeaker voice coil 20a is wound on coiling boss 12
Outside, and voice coil loudspeaker voice coil 20a passes through outside and the corresponding site of oscillating plate 10 of the glue-line of itself in its voice coil line and coiling boss 12
Downside be bonded as one.
As shown in figure 3, the height of coiling boss 12 is less than voice coil loudspeaker voice coil 20a height in present embodiment, while voice coil loudspeaker voice coil 20a
Inner surface and outer surface are planar structure, i.e., voice coil loudspeaker voice coil 20a inner surface is flushed with the outer surface of coiling boss 12.
As shown in figure 3, the material of preferred oscillating plate 10 is high molecule plastic or light-weight metal in present embodiment.It is wherein high
Molecule plastics can select PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate) etc., but be not limited to
That states is several.Light-weight metal can select aluminium, aluminium alloy or stainless steel etc., be also not necessarily limited to above-mentioned several.When the material of oscillating plate 10
When matter is high molecule plastic, oscillating plate 10 can be molded by Shooting Technique.When the material of oscillating plate 10 is light-weight metal, vibration
Plate 10 can be molded by powder metallurgical technique.
Embodiment three：
As shown in figure 4, present embodiment and embodiment two are essentially identical, its difference is：
Voice coil loudspeaker voice coil 20b outer surface is planar structure, and inner surface is the hierarchic structure of concave and downward convex, while voice coil loudspeaker voice coil 20b
Inner surface flushed with the inner surface of coiling boss 12.
Example IV：
As shown in figure 5, present embodiment and embodiment two are essentially identical, its difference is：
Voice coil loudspeaker voice coil 20c outer surface be concave and downward convex step structure, while its cascaded surface preferably with coiling boss
12 lower surface is flushed.
Embodiment five：
As shown in fig. 6, present embodiment is essentially identical with example IV, its difference is：
Voice coil loudspeaker voice coil 20d outer surface is two-stage hierarchic structure, i.e., add one again in the lower section in original step face
The outwardly cascaded surface of level.
It should be noted that：The outer surface that example IV and embodiment five illustrate only voice coil loudspeaker voice coil is step structure and two
The series of the hierarchic structure of voice coil loudspeaker voice coil outer surface is not limited to example IV and implementation in the example of level hierarchic structure, practical application
One-level and two-stage in example five, designer can be increased according to the structure and performance requirement of acoustical generator, in the reality of the present invention
Apply in example and be not restricted.
Embodiment six：
As shown in fig. 7, present embodiment is essentially identical with example IV, its difference is the height of coiling boss 12
It is equal with voice coil loudspeaker voice coil 20e height.
Embodiment seven：
As shown in figure 8, present embodiment and embodiment six are essentially identical, its difference is the height of coiling boss 12
More than voice coil loudspeaker voice coil 20f height.
It should be noted that：Sound of the structure of voice coil loudspeaker voice coil shown in the drawings in embodiment six and embodiment seven with example IV
Coil structures are identical, and in practical application when the height of coiling boss is more than or equal to voice coil loudspeaker voice coil height, the outer surface of voice coil loudspeaker voice coil also may be used
To turn to planar structure (structure as shown in Figure 3), or to turn to two-stage ladder or multistage hierarchic structure (as shown in Figure 6
Structure), the structure on the outer surface of voice coil loudspeaker voice coil is not restricted in 7 two embodiments of embodiment six and embodiment.
Embodiment eight：
A kind of acoustical generator, including shell and the vibration component and magnetic circuit component that are housed in shell, vibration component is implements
Vibration component described in example two to embodiment seven.
The present invention sets coiling boss on oscillating plate, and then voice coil line is directly wound on coiling boss, so that
Realized during voice coil loudspeaker voice coil coiling and the combination of oscillating plate is fixed, greatly simplified the packaging technology of product, improve
The packaging efficiency of product, while also improving the concentricity and uniformity of product, is conducive to the lifting of acoustical generator acoustical behavior.
The present invention is not limited to above-mentioned specific embodiment, one of ordinary skill in the art from above-mentioned design,
Without performing creative labour, a variety of conversion made are within the scope of the present invention.
Claims (10)
1. voice coil loudspeaker voice coil winding method, it is characterised in that set the ring winding boss of protrusion in the side of oscillating plate, by voice coil line around
System is heated in the outside of the coiling boss to the voice coil line so that the glue-line of the voice coil line, which melts, to be directly bonded
On the oscillating plate, the voice coil loudspeaker voice coil after the completion of coiling is directly combined as a whole with the oscillating plate.
2. voice coil loudspeaker voice coil winding method according to claim 1, it is characterised in that if the height of the coiling boss is less than described
The height of voice coil loudspeaker voice coil, then need to set up wire winding tool at the coiling boss, the outer surface of the wire winding tool and the coiling
The inner surface or outer surface of boss are flushed, and the voice coil line for growing the voice coil loudspeaker voice coil of the coiling boss is wound on the coiling
In frock.
3. voice coil loudspeaker voice coil winding method according to claim 1, it is characterised in that to the voice coil line by the way of blowing hot-air
Heated, and to the voice coil line blowing hot-air while voice coil line coiling.
4. vibration component, including vibrating diaphragm, oscillating plate and the voice coil loudspeaker voice coil being combined together, it is characterised in that the downside of the oscillating plate
It is provided with downwardly convex ring winding boss, the glue-line that the voice coil loudspeaker voice coil is wound on the outside of the coiling boss and passes through itself
It is integrated with being adhesively fixed on the downside of the coiling boss and the oscillating plate.
5. vibration component according to claim 4, it is characterised in that the inner surface of the voice coil loudspeaker voice coil and the coiling boss
Outer surface flush.
6. vibration component according to claim 5, it is characterised in that the outer surface of the voice coil loudspeaker voice coil is planar structure or is
The hierarchic structure of concave and downward convex.
7. vibration component according to claim 4, it is characterised in that the height of the coiling boss is less than the voice coil loudspeaker voice coil
Highly, the inner surface of the voice coil loudspeaker voice coil is flushed with the inner surface of the coiling boss, and the outer surface of the voice coil loudspeaker voice coil is plane
Structure.
8. vibration component according to claim 4, it is characterised in that the material of the oscillating plate is high molecule plastic or light
Matter metal.
9. vibration component according to claim 8, it is characterised in that when the material of the oscillating plate is high molecule plastic
When, the oscillating plate is molded by Shooting Technique；When the material of the oscillating plate is light-weight metal, the oscillating plate passes through powder
Last metallurgical technology shaping.
10. acoustical generator, including shell and the vibration component and magnetic circuit component that are housed in the shell, it is characterised in that it is described
Vibration component is the vibration component described in claim 4 to 9 any claim.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710386279.5A CN107172547B (en) | 2017-05-26 | 2017-05-26 | Voice coil winding method, vibration assembly and sounder with vibration assembly |
| PCT/CN2017/089386 WO2018214209A1 (en) | 2017-05-26 | 2017-06-21 | Method for winding voice coil, and vibration assembly and sounder with vibration assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710386279.5A CN107172547B (en) | 2017-05-26 | 2017-05-26 | Voice coil winding method, vibration assembly and sounder with vibration assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107172547A true CN107172547A (en) | 2017-09-15 |
| CN107172547B CN107172547B (en) | 2020-05-08 |
Family
ID=59821945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710386279.5A Active CN107172547B (en) | 2017-05-26 | 2017-05-26 | Voice coil winding method, vibration assembly and sounder with vibration assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107172547B (en) |
| WO (1) | WO2018214209A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111294720A (en) * | 2018-12-07 | 2020-06-16 | 瑞声科技(新加坡)有限公司 | Voice coil assembly, manufacturing method, loudspeaker, winding equipment and additional structure thereof |
| CN111741416A (en) * | 2020-07-10 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Sound production device, voice coil thereof and winding method of voice coil |
| CN112004179A (en) * | 2020-09-02 | 2020-11-27 | 瑞声新能源发展(常州)有限公司科教城分公司 | Voice coil manufacturing system, coil heating device and auxiliary unit |
| CN112040376A (en) * | 2020-09-02 | 2020-12-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Voice coil manufacturing system and voice coil manufacturing method |
| WO2022047858A1 (en) * | 2020-09-02 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Loudspeaker, voice coil, voice coil manufacturing method, and coil heating device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294720A (en) * | 2018-12-07 | 2020-06-16 | 瑞声科技(新加坡)有限公司 | Voice coil assembly, manufacturing method, loudspeaker, winding equipment and additional structure thereof |
| CN111294720B (en) * | 2018-12-07 | 2021-08-10 | 瑞声科技(新加坡)有限公司 | Voice coil assembly, manufacturing method, loudspeaker, winding equipment and additional structure thereof |
| CN111741416A (en) * | 2020-07-10 | 2020-10-02 | 瑞声科技(新加坡)有限公司 | Sound production device, voice coil thereof and winding method of voice coil |
| CN111741416B (en) * | 2020-07-10 | 2021-12-14 | 瑞声科技(新加坡)有限公司 | Sound production device, voice coil thereof and winding method of voice coil |
| CN112004179A (en) * | 2020-09-02 | 2020-11-27 | 瑞声新能源发展(常州)有限公司科教城分公司 | Voice coil manufacturing system, coil heating device and auxiliary unit |
| CN112040376A (en) * | 2020-09-02 | 2020-12-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Voice coil manufacturing system and voice coil manufacturing method |
| CN112004179B (en) * | 2020-09-02 | 2021-09-24 | 瑞声新能源发展(常州)有限公司科教城分公司 | Voice coil manufacturing system, coil heating device and auxiliary unit |
| WO2022047858A1 (en) * | 2020-09-02 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Loudspeaker, voice coil, voice coil manufacturing method, and coil heating device |
| WO2022047856A1 (en) * | 2020-09-02 | 2022-03-10 | 瑞声声学科技(深圳)有限公司 | Voice coil manufacturing system and voice coil manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107172547B (en) | 2020-05-08 |
| WO2018214209A1 (en) | 2018-11-29 |
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