CN115086842B - Method for manufacturing magnetic circuit assembly, magnetic circuit assembly and loudspeaker - Google Patents
Method for manufacturing magnetic circuit assembly, magnetic circuit assembly and loudspeaker Download PDFInfo
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- CN115086842B CN115086842B CN202210990232.0A CN202210990232A CN115086842B CN 115086842 B CN115086842 B CN 115086842B CN 202210990232 A CN202210990232 A CN 202210990232A CN 115086842 B CN115086842 B CN 115086842B
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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
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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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
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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)
- Hard Magnetic Materials (AREA)
Abstract
The invention discloses a manufacturing method of a magnetic circuit assembly, the magnetic circuit assembly and a loudspeaker, wherein the manufacturing method of the magnetic circuit assembly comprises the following steps: providing a mold comprising a first mold and a second mold that cooperate to form a cavity; placing a magnetically conductive mixture and a magnet in the cavity, wherein the magnetically conductive mixture comprises magnetically conductive powder and a binder which are mixed; the magnet comprises a side magnet structure; and carrying out degreasing sintering on the magnetic conductive mixture to form a magnetic conductive structure integrally fixed on the magnet, wherein the magnetic conductive structure and the magnet form a magnetic circuit component, and an air flow channel is formed on the side magnet structure of the magnetic circuit component. According to the technical scheme, the binding force between the magnetic circuit assemblies and the thickness consistency of the magnetic circuit assemblies are improved, the consistency of the vibration space of the loudspeaker is improved, meanwhile, the airflow noise between the loudspeaker and the rear cavity of the loudspeaker module is reduced, and the sound effect of the loudspeaker is improved.
Description
Technical Field
The invention relates to the technical field of sound generating devices, in particular to a manufacturing method of a magnetic circuit component, the magnetic circuit component and a loudspeaker.
Background
The magnetic circuit component of the loudspeaker drives the voice coil of the loudspeaker to move, and the voice coil drives the vibration mode to vibrate and produce sound. In the related art, all the magnetic circuit units in the magnetic circuit assembly need to be connected and fixed through glue, and are affected by thickness tolerances of the magnet, the washer, the magnetic yoke and the glue, and the thickness tolerances of different positions of the magnetic circuit assembly are larger after the magnetic circuit assembly is assembled, so that the consistency of vibration spaces of products is affected. In addition, to glue connection fixed magnetic circuit assembly, when this type of speaker was used to the speaker module, glue was easy to be blockked up with the air current passageway of module shell back cavity intercommunication, leaded to the air current unobstructed to produce the air current noise, influence product sound effect.
Disclosure of Invention
The invention mainly aims to provide a manufacturing method of a magnetic circuit component, which aims to improve the thickness consistency of the magnetic circuit component, improve the consistency of the vibration space of a loudspeaker, reduce the airflow noise between the magnetic circuit component and the rear cavity of a loudspeaker module and improve the sound effect of the loudspeaker.
In order to achieve the above object, the method for manufacturing a magnetic circuit assembly according to the present invention comprises the steps of:
providing a mould; the mold comprises a first mold and a second mold which cooperate to form a cavity;
placing a magnetically conductive mixture and a magnet in the cavity; the magnetic conductive mixture comprises magnetic conductive powder and a binding agent which are mixed; the magnet comprises a side magnet structure;
degreasing and sintering the magnetic conductive mixture to form a magnetic conductive structure integrally fixed on the magnet, wherein the magnetic conductive structure and the magnet form a magnetic circuit assembly; in the magnetic circuit assembly, an air flow channel is formed on the side magnet structure.
Optionally, the first die has a first groove, and the cavity comprises the first groove; the mould also comprises a third mould, the third mould is provided with a lug corresponding to the first groove, and the protruding height of the lug is smaller than the depth of the first groove; the magnetic conduction structure comprises a washer, and the magnetic conduction mixture comprises a first magnetic conduction mixture used for degreasing and sintering to form the washer;
the step of placing a magnetically conductive mixture and a magnet in the cavity comprises:
injecting the first magnetically conductive mixture into the first groove;
closing the third die and the first die to enable the lug to be inserted into the first groove, and extruding the first magnetic conductive mixture in the first groove to form a washer-shaped blank;
opening the third die relative to the first die;
placing the magnet into the first groove and abutting the magnet against the washer-shaped blank;
the washer comprises a side washer corresponding to the side magnet structure, the first groove comprises a side groove corresponding to the side washer, and the lug comprises a side lug corresponding to the side groove.
Optionally, the first die has a first groove, and the cavity comprises the first groove; the mould also comprises a third mould, the third mould is provided with a lug corresponding to the first groove, and the protruding height of the lug is smaller than the depth of the first groove; the magnetic conduction structure comprises a washer, and the magnetic conduction mixture comprises a first magnetic conduction mixture used for degreasing and sintering to form the washer;
the step of placing a magnetically conductive mixture and a magnet in the cavity comprises:
clamping the first die and the third die to form a first injection cavity between the first groove and the bump;
injecting the first magnetically conductive mixture into the first injection cavity to form a washer-shaped blank;
opening the third die relative to the first die;
placing the magnet into the first groove and abutting the magnet against the washer-shaped blank;
the washer comprises a side washer corresponding to the side magnet structure, the first groove comprises a side groove corresponding to the side washer, and the lug comprises a side lug corresponding to the side groove.
Optionally, at least one blocking position is arranged on the side groove, and an avoidance notch is arranged on the side bump corresponding to the blocking position;
the airflow channel corresponds to the blocking position.
Optionally, the second die has a second groove, the second groove covering the first groove; the magnetic conduction structure further comprises a magnetic conduction yoke, and the magnetic conduction mixture further comprises a second magnetic conduction mixture used for degreasing and sintering to form the magnetic conduction yoke;
after the step of placing the magnet into the first recess and abutting the washer-shaped blank, the step of placing the magnetically conductive mixture and magnet into the cavity further comprises:
clamping the second die to the first die to form a second injection cavity between the second groove and the first die and the magnet;
and injecting the second magnetic conductive mixture into the second injection cavity to form a magnetic conductive yoke-shaped blank.
Optionally, the width of the magnet is smaller than that of the first groove, so that an injection gap communicating the first injection cavity with the second injection cavity is formed between the magnet and the groove wall of the first groove;
in the step of injecting the second magnetically permeable mixture into the second injection cavity to form a magnetic yoke shaped blank, a portion of the second magnetically permeable mixture is injected into the injection gap.
Optionally, the first magnetically permeable mixture is the same as the second magnetically permeable mixture.
Optionally, the magnetically permeable powder comprises iron-nickel soft magnetic alloy powder.
Optionally, the adhesive comprises paraffin and/or polyoxymethylene.
The invention also provides a magnetic circuit component which is manufactured by the manufacturing method of the magnetic circuit component.
The invention also provides a loudspeaker which comprises a shell, a vibration system and the magnetic circuit assembly, wherein the magnetic circuit assembly is arranged on the shell, and the vibration system is connected with the shell and is arranged opposite to the magnetic circuit assembly.
According to the technical scheme, the magnetic conductive mixture and the magnet are placed in the cavity of the mold, then the magnetic conductive mixture is degreased, sintered and fixed on the magnet to form the magnetic circuit assembly comprising the magnetic conductive structure and the magnet, and the thicknesses of different positions of the prepared magnetic circuit assembly can be consistent through the limitation of the shape and the size of the cavity, so that the consistency of the vibration space of a product is improved; in addition, the magnetic conduction structure is fixed on the magnet by degreasing and sintering, so that the binding force between the magnetic conduction structure and the magnet is higher, the binding is more stable and reliable, and the structural stability and reliability of the magnetic circuit component are improved; furthermore, magnetic circuit assembly's limit magnet structure is formed with airflow channel, so, when this speaker is applied to the speaker module, this airflow channel of accessible and the back chamber intercommunication in the module shell, because magnetic circuit assembly need not to adopt glue fixed, so this airflow channel can not blockked up by glue to can avoid the air current unsmooth, reduce the air current noise, promote the sound effect of speaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a magnetic circuit assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the first mold and the third mold of the mold used in the method for manufacturing the magnetic circuit assembly according to the present invention;
FIG. 3 is an exploded view of the first and third molds of FIG. 2;
fig. 4 is a schematic structural view of the first die, the second die and the magnet of the die used in the method for manufacturing the magnetic circuit assembly according to the present invention;
FIG. 5 is an exploded view of the first and second molds of FIG. 4;
FIG. 6 is an enlarged view of a portion A of FIG. 4;
fig. 7 is a schematic structural diagram of another embodiment of the magnetic circuit assembly of the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) | |
| 10 | First die | 11 | The |
|
| 20 | |
21 | |
|
| 30 | Third die | 31 | |
|
| | Center projection | 31b | |
|
| 101 | |
102 | Second injection cavity | |
| 2’ | Washer-shaped blank | 3’ | Shaped blank of magnetic |
|
| 1 | Magnet body | 1a | |
|
| 1b | |
2 | |
|
| 2a | |
| Side washer | |
| 3 | Magnetic |
1c | |
|
| 31c | Avoiding gap |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if the present invention relates to directional indications (such as up, down, left, right, front, back, 8230; \8230;), the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a manufacturing method of a magnetic circuit component.
Referring to fig. 1 to 6, in an embodiment of the present invention, a method for manufacturing the magnetic circuit assembly includes the steps of:
s10, providing a mould; the mold comprises a first mold 10 and a second mold 20 which cooperate to form a cavity;
s20, placing the magnetic conductive mixture and the magnet 1 into the cavity; the magnetic conductive mixture comprises magnetic conductive powder and a binding agent which are mixed; the magnet 1 comprises a side magnet structure 1b;
s30, degreasing and sintering the magnetic conductive mixture to form a magnetic conductive structure integrally fixed on the magnet 1, wherein the magnetic conductive structure and the magnet 1 form a magnetic circuit assembly; in the magnetic circuit assembly, the side magnet structure 1b is formed with an air flow passage 1c.
In the present invention, one of the first mold 10 and the second mold 20 is a female mold, and the other one of the first mold and the second mold may be a male mold or a female mold, as long as the shape and the size of the formed cavity are matched with those of the magnetic circuit component to be manufactured, so that the manufactured magnetic circuit component can meet the design requirements.
In the invention, the magnetically conductive mixture comprises magnetically conductive powder and a binder which are mixed, so that a magnetically conductive structure formed by degreasing and sintering the magnetically conductive mixture has magnetic permeability and is used as the washer 2 and/or the magnetically conductive yoke 3 in the magnetic circuit assembly. Optionally, in this embodiment, the magnetic conductive powder includes iron-nickel soft magnetic alloy powder, and the magnetic conductive powder has excellent magnetic conductivity; of course, in other embodiments, the magnetically conductive powder may also include other powders with good magnetic permeability. Optionally, in this embodiment, the adhesive includes at least one of paraffin and polyoxymethylene; of course, in other embodiments, the adhesive may also include other adhesives.
According to the technical scheme, the magnetic conductive mixture and the magnet 1 are placed in the cavity of the mold, then the magnetic conductive mixture is degreased, sintered and fixed on the magnet 1 to form the magnetic circuit assembly comprising the magnetic conductive structure and the magnet 1, the thicknesses of different positions of the prepared magnetic circuit assembly can be consistent through the limitation of the shape and the size of the cavity, and therefore the consistency of the vibration space of a product is improved; in addition, the magnetic conduction structure is fixed on the magnet 1 by degreasing and sintering, so that the binding force between the magnetic conduction structure and the magnet 1 is higher, and the binding is more stable and reliable, thereby improving the structural stability and reliability of the magnetic circuit assembly; furthermore, magnetic circuit assembly's limit magnet structure is formed with airflow channel 1c, so, when this speaker was applied to the speaker module, this airflow channel 1c of accessible and the back chamber intercommunication in the module shell, because magnetic circuit assembly need not to adopt glue fixed, so this airflow channel 1c can not blockked up by glue to can avoid the air current unsmooth, reduce the air current noise, promote the sound effect of speaker.
It should be noted that, in the present invention, the magnetic circuit assembly generally includes both washer 2 and magnetic yoke 3. However, in the present invention, both the washer 2 and the magnetic conductive yoke 3 may be formed by degreasing and sintering the magnetic conductive mixture, or one of the washer 2 and the magnetic conductive yoke 3 may be formed by degreasing and sintering the magnetic conductive mixture, so that the thickness of the part of the magnetic conductive structure after being combined with the magnet 1 is consistent, and the other may be assembled by using an existing independent component.
In an embodiment of the present invention, the first die 10 has a first groove 11, and the cavity includes the first groove 11; the mold further comprises a third mold 30, wherein a bump 31 is arranged on the third mold 30 corresponding to the first groove 11, and the protruding height of the bump 31 is smaller than the depth of the first groove 11; the magnetic conduction structure comprises a washer 2, and the magnetic conduction mixture comprises a first magnetic conduction mixture for degreasing and sintering to form the washer 2;
the step S20 includes:
s21, closing the first mold 10 and the third mold 30 to form a first injection cavity 101 between the first groove 11 and the bump 31;
s22, injecting the first magnetic conduction mixture into the first injection cavity 101 to form a washer-shaped blank 2';
s23, opening the third die 30 relative to the first die 10;
s24, placing the magnet 1 into the first groove 11 and abutting against the washer-shaped blank 2';
the washer 2 comprises a side washer 2b corresponding to the side magnet structure 1b, the first groove 11 comprises a side groove corresponding to the side washer 2b, and the bump 31 comprises a side bump 31b corresponding to the side groove.
In this embodiment, the first mold 10 and the third mold 30 are matched to obtain a first injection cavity 101 having a shape and a size consistent with those of the washer 2, and then the first magnetic conductive mixture is injected into the first injection cavity 101 to obtain the washer-shaped blank 2'.
However, the design is not limited to this, in other embodiments, a predetermined amount of the first magnetic conductive mixture may be injected into the first groove 11, and then the protrusion 31 of the third die 30 is used to extrude the first magnetic conductive mixture in the first groove 11, so as to form the washer-shaped blank 2'; specifically, in this embodiment, the step S20 includes:
s21', injecting the first magnetic conduction mixture into the first groove 11;
s22', closing the third die 30 and the first die 10 to insert the protrusion 31 into the first groove 11, and extruding the first magnetically conductive mixture in the first groove 11 to form a washer-shaped blank 2';
s23', opening the third die 30 relative to the first die 10;
s24', placing the magnet 1 into the first groove 11, and abutting against the washer-shaped blank 2'.
In addition, in both embodiments, the washer-shaped blank 2' is formed first, and then the magnet 1 is placed, so that the washer 2 shape is formed, and the washer 2 and the magnet 1 are arranged in a stacked manner.
In an embodiment of the present invention, referring to fig. 3, at least one partition position is disposed on the side groove, and an avoidance gap 31c is disposed on the side protrusion 31b corresponding to the partition position; the airflow passage 1c corresponds to the blocking position. In this embodiment, by setting the separation position, when the washer-shaped blank 2' is formed, the first magnetic conductive mixture occupies the position of the air flow channel 1c, so that the air flow channel 1c can be formed on the side magnet structure 1b in the magnetic circuit assembly after degreasing and sintering. Optionally, the side magnet structure 1b includes at least one pair of side magnet assemblies (the two side magnet assemblies are oppositely disposed), each side magnet assembly includes at least two side magnets disposed at an interval, the interval is the air flow channel 1c, and it is understood that the interval corresponds to the spacing position; specifically, the edge groove is provided with a sub-groove corresponding to each edge magnet, and the separation position is the interval between two adjacent sub-grooves.
However, the present design is not limited thereto, and in other embodiments, the airflow channel 1c may be formed without using a blocking position; for example, the side magnet structure 1b may be provided with a through hole, the through hole may be closed by a plug separable from the side magnet structure 1b, the magnetic circuit assembly may be formed by degreasing and sintering, the mold may be opened, and the plug may be separated from the through hole to form the gas flow path 1c in the through hole.
In an embodiment of the present invention, referring to fig. 1 and 3, the magnet 1 further includes a central magnet 1a, and the washer 2 further includes a central washer 2a corresponding to the central magnet 1 a; the first groove 11 further comprises a central groove corresponding to the central washer 2a, and the central groove and the side grooves are arranged at intervals; the projection 31 further includes a central projection 31a corresponding to the central groove, and the central projection 31a and the side projection 31b are spaced apart from each other. The magnetic circuit subassembly that this embodiment preparation was got, its central magnetic circuit and limit magnetic circuit all are integrated into one piece, and magnetic circuit subassembly's integrated level is high.
In addition, the magnetic circuit assembly corresponding to the present embodiment has both the center magnet 1a and the side magnet structure 1b; however, the design is not limited to this, and referring to fig. 7, the magnetic circuit assembly of other embodiments may also have only the side magnet structure 1b, and the central magnetic circuit is not provided with the central magnet 1a, but is provided with only the central flux guiding post.
In an embodiment of the present invention, the second die 20 has a second groove 21, and the second groove 21 covers the first groove 11; the magnetic conduction structure further comprises a magnetic conduction yoke 3, and the magnetic conduction mixture further comprises a second magnetic conduction mixture used for degreasing and sintering to form the magnetic conduction yoke 3;
after the step S24 or S24', the step S20 further includes:
s25, clamping the second mold 20 and the first mold 10 to form a second injection cavity 102 between the second groove 21 and the first mold 10 and the magnet 1;
s26, injecting the second magnetically conductive mixture into the second injection cavity 102 to form a magnetically conductive yoke shape blank 3'.
In this embodiment, the first mold 10 and the second mold 20 are matched to obtain a second injection cavity 102 having a shape and a size consistent with those of the magnetic yoke 3, and then the second magnetic conductive mixture is injected into the second injection cavity 102 to obtain the magnetic yoke shape blank 3'; in this way, the shape of the yoke 3 is facilitated, thereby facilitating the laminated arrangement of the yoke 3 and the magnet 1.
Alternatively, referring to fig. 6, the width of the magnet 1 is smaller than that of the first groove 11, so that an injection gap communicating the first injection cavity 101 and the second injection cavity 102 is formed between the magnet 1 and the groove wall of the first groove 11; in step S26, a portion of the second magnetically permeable mixture is injected into the injection gap; therefore, after the second magnetic conduction mixture is subjected to degreasing sintering, a connecting structure for connecting the magnetic conduction yoke 3 and the washer 2 can be formed on the side surface of the magnet 1, so that the structural stability of the whole magnetic circuit assembly is better, and the structure is more reliable. It should be noted that, in the present invention, in order to facilitate the placement of the magnet 1 into the first groove 11, the width of the magnet 1 is usually slightly smaller than the width of the first groove 11, that is, the injection gap is usually formed as a result of the smooth execution of the step S24 or S24'.
Optionally, the first magnetically permeable mixture is the same as the second magnetically permeable mixture; therefore, the magnetic conductive mixture can be mixed well at one time, and the manufacturing process is more convenient. Of course, in other embodiments, different first and second magnetic conductive mixtures may be manufactured according to different requirements of the washer 2 and the magnetic yoke 3, for example, different requirements of magnetic conductivity, different requirements of strength, and the like.
The present invention further provides a magnetic circuit assembly, and the manufacturing method of the magnetic circuit assembly specifically refers to the above embodiments, and since the magnetic circuit assembly adopts all technical solutions of all the above embodiments, the magnetic circuit assembly at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The present invention further provides a speaker, which includes a housing, a vibration system, and a magnetic circuit assembly, and the manufacturing method of the magnetic circuit assembly specifically refers to the above embodiments, and since the speaker adopts all the technical solutions of all the above embodiments, the speaker at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. The vibration system is connected with the shell and is arranged opposite to the magnetic circuit component.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method of making a magnetic circuit assembly, comprising the steps of:
providing a mould; the mould comprises a first mould and a second mould which are matched to form a cavity;
placing a magnetically conductive mixture and a magnet in the cavity; the magnetic conductive mixture comprises magnetic conductive powder and a binding agent which are mixed; the magnet comprises a side magnet structure;
degreasing and sintering the magnetic conductive mixture to form a magnetic conductive structure integrally fixed on the magnet, wherein the magnetic conductive structure and the magnet form a magnetic circuit assembly; in the magnetic circuit component, an airflow channel is formed on the side magnet structure;
the first die is provided with a first groove, and the cavity comprises the first groove; the mould also comprises a third mould, the third mould is provided with a lug corresponding to the first groove, and the protruding height of the lug is smaller than the depth of the first groove; the magnetic conduction structure comprises a washer, and the magnetic conduction mixture comprises a first magnetic conduction mixture used for degreasing and sintering to form the washer;
the step of placing a magnetically conductive mixture and a magnet in the cavity comprises:
injecting the first magnetic conductive mixture into the first groove, closing the third die and the first die to enable the lug to be inserted into the first groove, and extruding the first magnetic conductive mixture in the first groove to form a washer-shaped blank; or closing the first die and the third die to form a first injection cavity between the first groove and the bump, and injecting the first magnetic conductive mixture into the first injection cavity to form a washer-shaped blank;
opening the third die relative to the first die;
placing the magnet into the first groove and abutting the magnet against the washer-shaped blank;
the washer comprises a side washer corresponding to the side magnet structure, the first groove comprises a side groove corresponding to the side washer, and the lug comprises a side lug corresponding to the side groove.
2. The method for manufacturing a magnetic circuit assembly according to claim 1, wherein the side groove is provided with at least one blocking position, and the side protrusion is provided with an avoiding notch corresponding to the blocking position;
the airflow channel corresponds to the blocking position.
3. The method of manufacturing a magnetic circuit assembly according to claim 1, wherein the second die has a second groove that covers the first groove; the magnetic conduction structure further comprises a magnetic conduction yoke, and the magnetic conduction mixture further comprises a second magnetic conduction mixture used for degreasing and sintering to form the magnetic conduction yoke;
after the step of placing the magnet into the first recess and abutting the washer-shaped blank, the step of placing the magnetically conductive mixture and magnet into the cavity further comprises:
clamping the second mold to the first mold to form a second injection cavity between the second groove and the first mold and the magnet;
and injecting the second magnetic conductive mixture into the second injection cavity to form a magnetic conductive yoke-shaped blank.
4. The method of manufacturing a magnetic circuit assembly according to claim 3, wherein the width of the magnet is smaller than the width of the first recess, and an injection gap communicating the first injection cavity and the second injection cavity is formed between the magnet and a groove wall of the first recess;
in the step of injecting the second magnetically permeable mixture into the second injection cavity to form a magnetic yoke shaped blank, a portion of the second magnetically permeable mixture is injected into the injection gap.
5. The magnetic circuit assembly manufacturing method of claim 3, wherein the first magnetically permeable compound is the same as the second magnetically permeable compound.
6. The method of making a magnetic circuit assembly of claim 1, wherein the magnetically permeable powder comprises an iron-nickel soft magnetic alloy powder; and/or
The adhesive comprises paraffin and/or polyoxymethylene.
7. A magnetic circuit assembly, characterized in that the magnetic circuit assembly is manufactured by the manufacturing method of the magnetic circuit assembly according to any one of claims 1 to 6.
8. A loudspeaker comprising a housing, a vibration system, and the magnetic circuit assembly of claim 7, wherein the magnetic circuit assembly is disposed in the housing, and the vibration system is connected to the housing and disposed opposite the magnetic circuit assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210990232.0A CN115086842B (en) | 2022-08-18 | 2022-08-18 | Method for manufacturing magnetic circuit assembly, magnetic circuit assembly and loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210990232.0A CN115086842B (en) | 2022-08-18 | 2022-08-18 | Method for manufacturing magnetic circuit assembly, magnetic circuit assembly and loudspeaker |
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| CN115086842A CN115086842A (en) | 2022-09-20 |
| CN115086842B true CN115086842B (en) | 2022-11-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176427A (en) * | 1993-11-10 | 1995-07-14 | Matsushita Electric Ind Co Ltd | Magnetic circuit unit for microspeaker and its production |
| WO2013108607A1 (en) * | 2012-01-20 | 2013-07-25 | パナソニック株式会社 | Magnetic circuit for a speaker and speaker using same |
| CN210093518U (en) * | 2019-06-30 | 2020-02-18 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN112261553A (en) * | 2020-10-16 | 2021-01-22 | 歌尔股份有限公司 | Magnetic circuit assembly manufacturing method, magnetic circuit assembly and loudspeaker |
-
2022
- 2022-08-18 CN CN202210990232.0A patent/CN115086842B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176427A (en) * | 1993-11-10 | 1995-07-14 | Matsushita Electric Ind Co Ltd | Magnetic circuit unit for microspeaker and its production |
| WO2013108607A1 (en) * | 2012-01-20 | 2013-07-25 | パナソニック株式会社 | Magnetic circuit for a speaker and speaker using same |
| CN210093518U (en) * | 2019-06-30 | 2020-02-18 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN112261553A (en) * | 2020-10-16 | 2021-01-22 | 歌尔股份有限公司 | Magnetic circuit assembly manufacturing method, magnetic circuit assembly and loudspeaker |
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| Publication number | Publication date |
|---|---|
| CN115086842A (en) | 2022-09-20 |
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