CN114157969B - Device for preventing magnetic jump of back magnetism - Google Patents
Device for preventing magnetic jump of back magnetism Download PDFInfo
- Publication number
- CN114157969B CN114157969B CN202111430965.0A CN202111430965A CN114157969B CN 114157969 B CN114157969 B CN 114157969B CN 202111430965 A CN202111430965 A CN 202111430965A CN 114157969 B CN114157969 B CN 114157969B
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- magnetic
- assembly
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- positioning
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 255
- 230000005389 magnetism Effects 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000004907 flux Effects 0.000 claims description 6
- 239000002885 antiferromagnetic material Substances 0.000 claims description 3
- 239000002902 ferrimagnetic material Substances 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 239000002907 paramagnetic material Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000005292 diamagnetic effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 26
- 238000000429 assembly Methods 0.000 description 26
- 230000006698 induction Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 210000002268 wool Anatomy 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
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention relates to the technical field of speakers, in particular to a device for preventing magnetic jump. The device for preventing the magnetic jump of the back magnetism is used for assembling and connecting the main magnetic assembly and the auxiliary magnetic assembly and mainly comprises a positioning assembly and a magnetic circuit magnetic conduction assembly. The auxiliary magnetic assembly is arranged in the positioning assembly and can be embedded in the positioning assembly; the magnetic circuit magnetic conduction assembly is sleeved on the positioning assembly, and the attractive force of the main magnetic assembly to the magnetic circuit magnetic conduction assembly is far greater than the repulsive force of the main magnetic assembly to the auxiliary magnetic assembly. The device for preventing the magnetic jump of the demagnetizing has the advantages of simple structure, convenience in processing and installation and low manufacturing cost, and can improve the reliability and stability of the assembly connection of the main magnetic assembly and the auxiliary magnetic assembly.
Description
Technical Field
The invention relates to the technical field of speakers, in particular to a device for preventing magnetic jump.
Background
In the technical field of loudspeakers, magnetic materials are widely used, and particularly in moving-coil loudspeakers, the use performance of the loudspeaker is greatly affected, and the main function of the magnetic materials is to generate a constant magnetic field with a certain magnetic induction density in a magnetic circuit.
At present, the novel loudspeaker is started from the technical indexes of reducing the volume and improving the transient response of the loudspeaker, magnetic materials with better performance and smaller size and magnetic conduction materials are often used as magnetic circuit parts, but the magnetic flux of the magnetic conduction materials in the magnetic circuit tends to be saturated to supersaturation along with the reduction of the thickness size, when the main magnet and the auxiliary magnet are magnetized by an externally applied magnetic field, the free magnetic poles at the two ends of the main magnet and the auxiliary magnet generate a magnetic field with opposite magnetization intensity directions, and the phenomenon of magnetic jump of the magnetic return easily occurs during the assembly of the magnetic circuit, so that the magnetic circuit cannot be assembled, the magnetic return is assembled in place, the magnetic distribution is uneven, the polarity is not in accordance with the requirements, the bonding reliability is low, and the like, and the working performance and the production efficiency of the loudspeaker are seriously influenced.
Therefore, there is a need to design a device for preventing the magnetic jump of the demagnetizing field to solve the above-mentioned technical problems in the prior art.
Disclosure of Invention
The invention aims to provide a device for preventing magnetic jump of the back magnetism, which has the advantages of simple structure, convenient processing and installation and low manufacturing cost, and can improve the reliability and stability of the assembly connection of a main magnetic assembly and an auxiliary magnetic assembly.
To achieve the purpose, the invention adopts the following technical scheme:
the invention provides a device for preventing magnetic jump of back magnetism, which is used for assembling and connecting a main magnetic assembly and a secondary magnetic assembly, and comprises the following components:
the auxiliary magnetic assembly is arranged in the positioning assembly and can be embedded in the positioning assembly;
the magnetic circuit magnetic conduction assembly is sleeved on the positioning assembly, and the attractive force of the main magnetic assembly to the magnetic circuit magnetic conduction assembly is far greater than the repulsive force of the main magnetic assembly to the auxiliary magnetic assembly.
As an alternative, the magnetic circuit magnetic conduction assembly comprises an annular protrusion, a groove is arranged on the main magnetic assembly, and the annular protrusion can be inserted into the groove.
As an alternative, the magnetic circuit magnetic conduction assembly further comprises a first mounting hole and a fixing piece, the positioning assembly comprises a second mounting hole, the first mounting hole corresponds to the second mounting hole one by one, and the fixing piece can penetrate through the first mounting hole and the second mounting hole.
As an alternative, the magnetic circuit magnetic conduction assembly further comprises a clamping portion, and the clamping portion is in a step shape.
As an alternative, the number of the clamping parts is two, and the two clamping parts are symmetrically arranged about the axis of the magnetic circuit magnetic conduction assembly.
As an alternative, the device for preventing the magnetic jump of the back magnet further comprises a shockproof assembly, wherein the shockproof assembly is arranged inside the positioning assembly.
As an alternative, an auxiliary magnetic steel is arranged in the positioning component, and the auxiliary magnetic steel can be attracted with the auxiliary magnetic component.
As an alternative, the positioning assembly further comprises a spacer plate, the spacer plate being disposed between the auxiliary magnetic steel and the auxiliary magnetic assembly.
As an alternative, the device for preventing magnetic jump of back magnetism further comprises a base, wherein the base is arranged at one end of the positioning component far away from the auxiliary magnetic component, and the base and the positioning component are integrally formed.
As an alternative, the magnetic circuit magnetic conduction component is made of one of paramagnetic material, ferromagnetic material, antiferromagnetic material and ferrimagnetic material.
The invention has the beneficial effects that: the device for preventing the magnetic jump of the demagnetizing field has the advantages of simple structure, strong universality, convenient processing and operation and low manufacturing cost, and is suitable for large-scale quantitative production. The magnetic induction lines of the auxiliary magnetic assemblies are distributed through the magnetic circuit magnetic conduction assemblies, the repulsive force of the auxiliary magnetic assemblies to the main magnetic assemblies is reduced, meanwhile, the attractive force of the magnetic circuit magnetic conduction assemblies to the main magnetic assemblies is far greater than the repulsive force, and then the assembly of the main magnetic assemblies and the auxiliary magnetic assemblies is realized, so that the phenomenon of magnetic jump caused by the reverse magnetism in the processing and assembly can be avoided, the assembly difficulty of the magnetic circuit components is improved, and the reliability of products is greatly improved.
Drawings
FIG. 1 is a schematic diagram of an apparatus for preventing magnetic jump from being demagnetized according to an embodiment of the present invention;
FIG. 2 is a front view of a device for preventing magnetic rebound provided in an embodiment of the present invention;
FIG. 3 is a left side view of a device for preventing magnetic rebound provided in an embodiment of the present invention;
FIG. 4 is a top view of a device for preventing magnetic rebound according to an embodiment of the present invention.
Reference numerals:
1. a positioning assembly; 2. a magnetic circuit magnetic conduction assembly; 21. an annular protrusion; 22. a fixing member; 23. a clamping part; 3. a shock assembly; 4. and (5) a base.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The technical problem that the speaker cannot work normally due to the fact that the magnetic poles with the same name of the main magnetic assembly and the auxiliary magnetic assembly in the prior art are difficult to assemble and cannot be assembled in place is solved. As shown in fig. 1 to 3, the present embodiment provides a device for preventing magnetic jump of back magnetism, which is used for assembling and connecting a main magnetic assembly and a sub magnetic assembly, and mainly comprises a positioning assembly 1 and a magnetic circuit magnetic conduction assembly 2. Wherein, the positioning component 1 is provided with a secondary magnetic component (not shown in the figure), and the secondary magnetic component can be embedded in the positioning component 1; the magnetic circuit magnetic conduction assembly 2 is sleeved on the positioning assembly 1, and the attractive force of the main magnetic assembly (not shown in the figure) to the magnetic circuit magnetic conduction assembly 2 is far greater than the repulsive force to the main magnetic assembly to the auxiliary magnetic assembly.
Further, the magnetic circuit magnetic conduction assembly 2 is made of one of paramagnetic materials, ferromagnetic materials, antiferromagnetic materials, ferrimagnetic materials and other composite materials, and the magnetic induction lines of the auxiliary magnetic assemblies in the positioning assembly 1 can be changed by the magnetic circuit magnetic conduction assembly 2, so that the magnetic induction lines of the magnetic poles of the auxiliary magnetic assemblies facing the main magnetic assemblies are reduced, the repulsive force between the auxiliary magnetic assemblies and the main magnetic assemblies is further reduced, meanwhile, one end of the magnetic circuit magnetic conduction assembly 2 facing the main magnetic assemblies is a different-name magnetic pole from one end of the magnetic circuit magnetic conduction assembly 2 facing the main magnetic assemblies, and therefore the magnetic circuit magnetic conduction assembly 2 can play a certain attraction role on the main magnetic assemblies, and the stability of assembly connection of the main magnetic assemblies and the auxiliary magnetic assemblies is further improved.
Furthermore, in this embodiment, the positioning assembly 1 and the magnetic circuit magnetic conduction assembly 2 are both cylindrical, and the radius of the bottom surface of the magnetic circuit magnetic conduction assembly 2 is slightly larger than that of the positioning assembly 1, so as to ensure that the magnetic circuit magnetic conduction assembly 2 can be sleeved on the positioning assembly 1. Besides the connection mode of sleeving the magnetic circuit magnetic conduction assembly 2 on the positioning assembly 1, the magnetic circuit magnetic conduction assembly 2 can be adhered by strong glue or connected by clamping additional clamping components, and the like, so long as the stable connection mode of the magnetic circuit magnetic conduction assembly 2 and the positioning assembly 1 is ensured, the protection scope of the invention is not repeated here.
Compared with the prior art, the device for preventing the magnetic jump of the demagnetizing provided by the embodiment has the advantages of simple structure, strong universality, convenient processing operation and low manufacturing cost, and is suitable for large-scale quantized production. The magnetic induction lines of the auxiliary magnetic assemblies are distributed through the magnetic circuit magnetic conduction assemblies 2, repulsive force of the auxiliary magnetic assemblies to the main magnetic assemblies is weakened, meanwhile attractive force of the magnetic circuit magnetic conduction assemblies 2 to the main magnetic assemblies is far greater than the repulsive force, and then assembly connection of the main magnetic assemblies and the auxiliary magnetic assemblies is achieved, so that the phenomenon of magnetic jump of the back magnetism in machining and assembly can be avoided, the assembly difficulty of magnetic circuit components is improved, and the reliability of products is greatly improved.
As shown in fig. 1-3, in the present embodiment, the magnetic circuit magnetic conduction assembly 2 includes an annular protrusion 21, and a groove is provided on the main magnetic assembly, and the annular protrusion 21 can be inserted into the groove. Specifically, when the operator assembles the main magnetic assembly, the annular protrusion 21 can be inserted into the groove of the main magnetic assembly, so that the changed magnetic induction line of the magnetic circuit magnetic conduction assembly 2 directly acts on the inside of the magnetic gap of the main magnetic assembly, thereby being beneficial to strengthening the attractive force of the magnetic circuit magnetic conduction assembly 2 and the main magnetic assembly, and further improving the stability and reliability of the connection of the main magnetic assembly and the auxiliary magnetic assembly.
As shown in fig. 1 and 4, the magnetic circuit magnetic conduction assembly 2 preferably further includes a first mounting hole and a fixing member 22, the positioning assembly 1 includes a second mounting hole (not shown in the drawings), and the first mounting hole corresponds to the second mounting hole one by one, and the fixing member 22 can pass through the first mounting hole and the second mounting hole. Preferably, the number of the first mounting holes and the number of the second mounting holes are two, and the straight line where the connecting line between the two first mounting holes is coincident with the diameter of the magnetic circuit magnetic conduction assembly 2, and the straight line where the connecting line between the two second mounting holes is also coincident with the diameter of the magnetic circuit magnetic conduction assembly 2.
Illustratively, the fixing member 22 may be an aluminum rod made of aluminum alloy, which has a light weight and can reduce the weight of the device for preventing the magnetic flux from jumping, and at the same time, the aluminum rod does not interfere with the distribution of the magnetic induction lines of the magnetic circuit magnetic conduction assembly 2. The operator passes through the first mounting hole and the second mounting hole through the mounting 22, and then realizes the stable connection of magnetic circuit magnetic conduction subassembly 2 and locating component 1.
In order to improve the tool clamping effect of the device for preventing the magnetic jump, as shown in fig. 1-3, in this embodiment, the magnetic circuit magnetic conduction assembly 2 further includes a clamping portion 23, and the clamping portion 23 has a step shape. And preferably, two clamping portions 23 are arranged, and the two clamping portions 23 are symmetrical to each other about the axis of the magnetic circuit magnetic conduction assembly 2, so that when the device for preventing the magnetic jump of the demagnetizing machine is clamped and moved by other tools, the stability of the device for preventing the magnetic jump of the demagnetizing machine is improved, and the risk of slipping is avoided.
As shown in fig. 1, in the present embodiment, the device for preventing the magnetic jump of the back magnetic field further includes a vibration prevention member 3, and the vibration prevention member 3 is disposed inside the positioning member 1. In the process of assembling the main magnetic assembly and the auxiliary magnetic assembly, the vibration of the auxiliary magnetic assembly is reduced, a certain buffering and damping effect is achieved, and a certain protection effect is achieved on the auxiliary magnetic assembly. The vibration prevention component 3 may be made of one or more of PE (foam), EVA (ethylene-vinyl acetate copolymer), EPE (pearl wool), rubber, sponge and other composite materials.
Preferably, in the present embodiment, an auxiliary magnetic steel and a partition plate are disposed in the positioning assembly 1, and the shockproof assembly 3 is located between the partition plate and the auxiliary magnetic assembly, the auxiliary magnetic steel can be attracted to the auxiliary magnetic assembly, and the partition plate is disposed between the auxiliary magnetic steel and the auxiliary magnetic assembly. The partition plate is favorable for separating the auxiliary magnetic steel from the auxiliary magnetic assembly, and the auxiliary magnetic steel and the auxiliary magnetic assembly are prevented from being attracted and stuck. On one hand, the auxiliary magnetic steel can play a certain role in attracting the auxiliary magnetic assembly, and the auxiliary magnetic assembly is prevented from moving or shaking randomly from the positioning assembly 1; on the other hand, the auxiliary magnetic steel can also play a certain polarity fool-proof role, so that the situation that the magnetic poles are reversely assembled due to misoperation of operators is avoided, and the assembly work efficiency of the operators is improved.
As shown in fig. 1-3, in this embodiment, the device for preventing magnetic jump of the demagnetizing field further includes a base 4, the base 4 is disposed at one end of the positioning component 1 away from the auxiliary magnetic component, and the base 4 and the positioning component 1 are integrally formed, so as to improve the processing efficiency of the positioning component 1 and the base 4, simplify the assembly procedure of assembling the positioning component 1 and the base 4, and improve the working efficiency. The base 4 is designed for a stepped counter bore, so that auxiliary magnetic steel in the positioning assembly 1 is protected, and external dust and impurities are prevented from entering the positioning assembly 1 to pollute the auxiliary magnetic steel.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A device for preventing magnetic flux reversals for assembling and connecting a primary magnetic assembly and a secondary magnetic assembly, comprising:
the positioning assembly (1), the auxiliary magnetic assembly is arranged in the positioning assembly (1), and the auxiliary magnetic assembly can be embedded in the positioning assembly (1);
the magnetic circuit magnetic conduction assembly (2), the magnetic circuit magnetic conduction assembly (2) is sleeved on the positioning assembly (1), and the attractive force of the main magnetic assembly on the magnetic circuit magnetic conduction assembly (2) is far greater than the repulsive force of the main magnetic assembly on the auxiliary magnetic assembly;
the magnetic circuit magnetic conduction assembly (2) comprises an annular protrusion (21), a groove is formed in the main magnetic assembly, and the annular protrusion (21) can be inserted into the groove;
the magnetic circuit magnetic conduction assembly (2) further comprises a first mounting hole and a fixing piece (22), the positioning assembly (1) comprises a second mounting hole, the first mounting holes correspond to the second mounting holes one by one, and the fixing piece (22) can penetrate through the first mounting holes and the second mounting holes.
2. The device for preventing the magnetic jump according to claim 1, wherein the magnetic circuit magnetic conduction assembly (2) further comprises a clamping portion (23), and the clamping portion (23) is in a step shape.
3. The device for preventing the magnetic jump according to claim 2, wherein the number of the clamping parts (23) is two, and the two clamping parts (23) are symmetrically arranged about the axis of the magnetic circuit magnetic conduction assembly (2).
4. The device for preventing magnetic flux reversals according to claim 1, characterized in that it further comprises a shockproof assembly (3), said shockproof assembly (3) being arranged inside said positioning assembly (1).
5. The device for preventing magnetic flux reverser according to claim 1, characterized in that an auxiliary magnetic steel is arranged in the positioning assembly (1), and the auxiliary magnetic steel can be attracted with the auxiliary magnetic assembly.
6. The device for preventing magnetic flux reversals according to claim 5, wherein the positioning assembly (1) further comprises a spacer plate, which is arranged between the auxiliary magnetic steel and the auxiliary magnetic assembly.
7. The device for preventing magnetic jump according to any of claims 1-6, characterized in that the device for preventing magnetic jump further comprises a base (4), the base (4) is arranged at the end of the positioning assembly (1) remote from the secondary magnetic assembly, and the base (4) is integrally formed with the positioning assembly (1).
8. The device for preventing diamagnetic skip-magnetization according to any of claims 1-6, wherein the magnetic circuit magnetic conductive assembly (2) is selected from one of paramagnetic material, ferromagnetic material, antiferromagnetic material and ferrimagnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111430965.0A CN114157969B (en) | 2021-11-29 | 2021-11-29 | Device for preventing magnetic jump of back magnetism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111430965.0A CN114157969B (en) | 2021-11-29 | 2021-11-29 | Device for preventing magnetic jump of back magnetism |
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| Publication Number | Publication Date |
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| CN114157969A CN114157969A (en) | 2022-03-08 |
| CN114157969B true CN114157969B (en) | 2024-03-29 |
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| CN202111430965.0A Active CN114157969B (en) | 2021-11-29 | 2021-11-29 | Device for preventing magnetic jump of back magnetism |
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| CN114157969A (en) | 2022-03-08 |
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