CN109429151B - Coaxial double-voice coil loudspeaker - Google Patents
Coaxial double-voice coil loudspeaker Download PDFInfo
- Publication number
- CN109429151B CN109429151B CN201810971987.XA CN201810971987A CN109429151B CN 109429151 B CN109429151 B CN 109429151B CN 201810971987 A CN201810971987 A CN 201810971987A CN 109429151 B CN109429151 B CN 109429151B
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- voice coil
- annular
- ring
- conduction plate
- magnetic conduction
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- 238000002955 isolation Methods 0.000 claims abstract description 26
- 230000009977 dual effect Effects 0.000 claims description 17
- 230000007423 decrease Effects 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 abstract description 4
- 230000004907 flux Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 230000003993 interaction Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 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
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/045—Mounting
-
- 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
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- 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
- H04R9/066—Loudspeakers using the principle of inertia
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
A coaxial double-voice coil loudspeaker comprises a yoke, a ring magnet, a first ring-shaped magnetic conduction plate, a second ring-shaped magnetic conduction plate, a first voice coil, a second voice coil and an isolation ring. The yoke comprises a bottom edge and a support column extending from the bottom edge, the support column having a boss and a ring flange. The ring flange surrounds the boss with an annular groove therebetween. The support column passes through a first central shaft hole of the annular magnet, and the annular magnet is sleeved on the yoke. The support column passes through a first central perforation of a first annular magnetic conduction plate, and the first annular magnetic conduction plate is arranged on the annular magnet. The isolation ring is arranged in the annular groove. The protruding part penetrates through two central through holes of the second annular magnetic conduction plate, so that the second annular magnetic conduction plate is arranged on the isolation ring. The second magnetic conduction plate and the first magnetic conduction plate are provided with a first magnetic gap, and the second magnetic conduction plate and the protruding part are provided with a second magnetic gap. A spacer is provided between the second annular magnetically permeable plate and the annular flange.
Description
Technical Field
The application relates to the electroacoustic field, in particular to the electroacoustic field of coaxial double-voice coil loudspeakers.
Background
The moving coil loudspeaker is a function of electroacoustic conversion by means of interaction induction of a magnetic field generated when an electric signal passes through the voice coil and a magnetic field of the permanent magnet so as to drive the vibrating diaphragm to vibrate air. In the prior art, a moving-coil speaker generally has a single diaphragm and a single voice coil, that is, all audio segments are subjected to electroacoustic conversion by the vibration of the single diaphragm.
However, a single diaphragm cannot simultaneously combine low frequency and high frequency, and cannot generally meet the range of 20Hz-20kHz audible frequency of human ears, so that the separate design of bass and treble is adopted to replay the respective frequency bands. The coaxial loudspeaker is characterized in that the bass loudspeaker and the treble loudspeaker are arranged on the same axis, and meanwhile, as the two loudspeakers are positioned on the same axis, the physical positioning of the two loudspeakers is close to the point sound source, the sound field positioning of the replayed music is very ideal, and the sound resolution is high.
In addition, when the high-low voice coil is generally arranged, the loudspeaker utilizes two groups of magnetic circuit systems to drive the two voice coils respectively, so that the volume of the loudspeaker is larger than that of one group of magnetic circuits of a single voice coil, and more magnets are needed.
Disclosure of Invention
In order to improve the prior art described above, a coaxial dual voice coil speaker is provided herein. The coaxial double-voice coil loudspeaker comprises a yoke, a ring magnet, a first ring magnetic conduction plate, a second ring magnetic conduction plate, a first voice coil, a second voice coil and an isolation ring.
The yoke comprises a bottom edge and a support column, wherein the support column extends from one end of the bottom edge, and one end of the support column away from the bottom edge is provided with a protruding part and a ring flange. The ring flange and the boss are positioned on the same surface of the support column, the ring flange surrounds the boss, and an annular groove is arranged between the ring flange and the boss. The annular magnet comprises a first central shaft hole, and the support column penetrates through the first central shaft hole, so that the annular magnet is sleeved on the yoke and is contacted with the bottom edge.
The first annular magnetic conduction plate comprises a first central through hole, and the support column penetrates through the first central through hole, so that the first annular magnetic conduction plate is arranged on the annular magnet. The protruding part penetrates through the isolation ring, so that the isolation ring is arranged in the annular groove. The second annular magnetic conduction plate comprises a second central through hole, and the second central through hole and the first central through hole have the same central shaft. The protruding part passes through the second central perforation, and the second annular magnetic conduction plate is arranged on the isolation ring. The second magnetic conduction plate and the first magnetic conduction plate are provided with a first magnetic gap, and the second magnetic conduction plate and the protruding part are provided with a second magnetic gap.
The first voice coil is located in the first magnetic gap. The second voice coil is located in the second magnetic gap.
In some embodiments, the isolation ring is an aluminum ring. The isolation ring is higher than the ring flange, the protruding portion is higher than the ring flange, and a spacing portion is arranged between the second annular magnetic conduction plate and the ring flange.
In some embodiments, the first annular magnetically permeable plate and the second annular magnetically permeable plate are located at substantially the same level.
In some embodiments, a space is provided between the ring magnet and the support post.
In some embodiments, the thickness of the bottom edge of the yoke decreases from the region proximate the boss to the periphery.
In some embodiments, the thickness of the first annular magnetically permeable plate tapers from an area proximate the first central aperture to the periphery.
In some embodiments, the second annular magnetically permeable plate further includes a step portion adjacent to the second central aperture.
In some embodiments, the first voice coil is a bass voice coil and the second voice coil is a treble voice coil.
In some embodiments, the width of the insulating ring is greater than the width of the ring flange.
In some embodiments, the height of the ring magnet is approximately equal to the height of the bottom edge to the top end of the ring flange.
The coaxial double-voice coil loudspeaker can be independently driven to high-frequency and low-frequency wave bands through the first voice coil and the second voice coil, can achieve better sound analysis effects at high-frequency and low-frequency parts, can further share the structural design of the yoke to reduce integral components, and achieves the effects of light weight, simple structure and rapid assembly. In addition, the magnetic line density can be adjusted by adjusting the distance between the first annular magnetic conduction plate and the second annular magnetic conduction plate, the distance between the second annular magnetic conduction plate and the convex part, the width and the height of the annular flange and the isolating ring, so as to meet the required frequency response.
Drawings
Fig. 1 is a partial exploded perspective view of a coaxial dual voice coil speaker.
Fig. 2 is a partial cross-sectional view of a coaxial dual voice coil speaker.
Fig. 3 is an enlarged view of region B in fig. 2.
Fig. 4 is a magnetic field distribution diagram of a coaxial dual voice coil speaker.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application.
Fig. 1 is a partially exploded perspective view of a coaxial dual-voice coil speaker, and fig. 2 is a partially cross-sectional view of the coaxial dual-voice coil speaker. Fig. 3 is an enlarged view of region B in fig. 2. As shown in fig. 1 to 3, the coaxial dual voice coil speaker 1 includes a yoke 10, a ring magnet 20, a first ring-shaped magnetically permeable plate 30, a second ring-shaped magnetically permeable plate 40, a first voice coil 61, a second voice coil 63, and an insulating ring 70. The yoke 10, the ring magnet 20, the first ring-shaped magnetic conductive plate 30, the second ring-shaped magnetic conductive plate 40, the first voice coil 61, the second voice coil 63, and the insulating ring 70 are coaxially provided with the same central axis a.
The yoke 10 is a T-shaped yoke comprising a bottom edge 11 and support posts 13. The support column 13 extends upwardly from one end of the bottom rim 11, and the end of the support column 13 remote from the bottom rim 11 has a boss 131 and a ring flange 133. In other words, the bottom edge 11 of the yoke 10 may have a disk shape, a hemispherical shape, or a dish shape having the support post 13 protruding from the center thereof, and the ring flange 133 is located at the periphery of the boss 131 and surrounds the boss 131. Between the ring flange 133 and the boss 131 there is an annular groove 135. The yoke 10 has an overall inverted T-shape in cross section.
The ring magnet 20 includes a first center shaft hole 21. The support column 13 passes through the first central shaft hole 21, so that the ring magnet 20 is sleeved on the yoke 10. The ring magnet 20 is in contact with the bottom edge 11 of the yoke 10. Here, the height of the ring magnet 20 is substantially equal to the height from the bottom edge 11 to the top end of the ring flange 133. The first annular magnetic conductive plate 30 includes a first central hole 31, and the support column 13 passes through the first central hole 31, so that the first annular magnetic conductive plate 30 is disposed on the annular magnet 20.
The isolation ring 70 may be an aluminum ring. The boss 131 passes through the isolation ring 70, and the isolation ring 70 is disposed in the annular groove 135. The second annular magnetic conductive plate 40 includes a second central through hole 41, and the second central through hole 41 and the first central through hole 31 also have the same central axis a. The protruding portion 131 passes through the second central through hole 41 and abuts against the isolation ring 70, that is, the second annular magnetic conductive plate 40 is disposed on the support column 13 via the isolation ring 70. In other words, the second annular magnetically permeable plate 40 is not placed directly on the support column 13. The first annular magnetic flux guide plate 30 has a larger diameter than the second annular magnetic flux guide plate 40, and the second annular magnetic flux guide plate 40 is disposed in a range surrounded by the first central shaft hole 21 of the first annular magnetic flux guide plate 30, and is arranged in a concentric manner.
In addition, a first magnetic gap 431 is provided between the second annular magnetic conductive plate 40 and the first magnetic conductive plate 30, and a second magnetic gap 433 is provided between the second annular magnetic conductive plate 40 and the boss 131. The isolation ring 70 has a height higher than the ring flange 133 such that a space 137 is provided between the second annular magnetically permeable plate 40 and the ring flange 133. Further, the first annular magnetic conductive plate 30 and the second annular magnetic conductive plate 40 are located at substantially the same level.
The first voice coil 61 is located in the first magnetic gap 431 and the second voice coil 63 is located in the second magnetic gap 433. Here, although not shown in the drawings, it will be understood by those skilled in the art that the first voice coil 61 and the second voice coil 63 are fixed by the speaker bracket and may be connected to the diaphragm, so that when the first voice coil 61 and the second voice coil 63 receive signals, they interact with the magnetic force of the ring magnet 20 to drive the diaphragm to push, thereby making a sound. Here, the radius of the first voice coil 61 is larger than that of the second voice coil 63. The first voice coil 61 may be a bass voice coil, and generates a low-frequency sound when driving the diaphragm to vibrate. The second voice coil 63 is a high-frequency voice coil, and generates high-frequency sounds when driving the diaphragm to vibrate. The first voice coil 61 and the second voice coil 63 may be connected to a diaphragm, respectively, or may be connected to the same diaphragm, the first voice coil 61 being connected to a central region of the diaphragm, and the second voice coil 63 being connected to an outer region of the diaphragm.
Further, referring again to fig. 2, in some embodiments, a space 35 is provided between the ring magnet 30 and the support post 13, where the radius of the ring magnet 30 may be adjusted to adjust the magnetic field strength of the first magnetic gap 431, the second magnetic gap 433, or the spacer 137 between the second annular magnetically permeable plate 40 and the annular flange 133. In addition, the space 35 may be filled with a buffer material, such as sound absorbing cotton, to avoid the influence of vibration of the coaxial dual-voice coil speaker 1.
Further, referring again to fig. 2, in some embodiments, the thickness of the bottom edge 11 of the yoke 10 decreases from the region proximate to the boss 13 to the periphery. That is, the bottom edge 11 has a convex middle and a flat and thin periphery, which is not limiting to the present application, and can also be adjusted in accordance with the shape of the overall speaker chamber.
In addition, in some embodiments, the thickness of the first annular magnetically permeable plate 30 decreases from an area proximate the first central aperture 31 to the periphery. Furthermore, the first annular magnetic conduction plate 30 and the bottom edge 11 of the yoke 10 can have a vertically symmetrical thickness variation, so that the whole structure is in a dish shape, and the whole volume is further reduced.
Fig. 4 is a magnetic field distribution diagram of a coaxial dual voice coil speaker. As shown in fig. 4, magnetic lines of force may be emitted from one end (bottom end) of the ring magnet 20, reach the support column 13 of the yoke 10 via the bottom edge 11 of the yoke 10, and then sequentially return to the ring magnet 20 (top end) via the second magnetic gap 433, the second annular magnetic conductive plate 40, the first magnetic gap 431, and the first annular magnetic conductive plate 30. Here, most of the magnetic force lines are emitted from the protrusion 131 of the yoke 10, pass through the second magnetic gap 433 (i.e., the high frequency gap corresponding to the first voice coil 63), enter the second annular magnetic flux guiding plate 40, and then enter the first magnetic gap 431 (i.e., the low frequency gap corresponding to the first voice coil 61). Finally, the magnetic flux returns to the ring magnet 20 through the ring magnetic conductive plate 30. In contrast, since the second magnetic gap 433 is present between the protruding portion 131 and the second annular magnetic conductive plate 40 and the first magnetic gap 431 is present between the first annular magnetic conductive plate 30 and the second annular magnetic conductive plate 40, the magnetic force line density passing through the first magnetic gap 431 and the second magnetic gap 433 can be adjusted by adjusting the widths thereof, and the interaction between the magnetic force generated by the annular magnet 20 and the first voice coil 61 and the second voice coil 63 after receiving the signals can be indirectly adjusted, thereby adjusting the frequency response of the entire coaxial dual voice coil speaker 1.
In addition, referring again to fig. 2 and also to fig. 4, in some embodiments, the second annular magnetic flux guiding plate 40 further includes a step 45. The step 45 is adjacent to the second central aperture 41 and the step 45 is higher near the first magnetic gap 431. This configuration facilitates the concentration of magnetic flux into the second magnetic gap 433.
In addition, as shown in fig. 4, some of the magnetic lines of force emitted from one end of the ring magnet 20 also have paths of a small portion of the magnetic lines of force that enter the first magnetic gap 431 via the annular flange 133 of the yoke 10 via the spacer 137, and then return to the ring magnet 20 via the annular magnetically permeable plate 30. The magnetic flux density in the first magnetic gap 431 is further increased by the annular flange 133, so that the interaction of the magnetic force with the first voice coil 61 after receiving the signal is enhanced, and a larger bass resonance effect is achieved.
Here, the isolation ring 70 is made of a non-magnetically conductive material, such as an aluminum ring, and only a small number of magnetic lines of force are passed through the isolation ring due to the use of a non-magnetically conductive material with high magnetic resistance. Here, the width of the insulating ring 70 is greater than the width of the ring flange 133. Therefore, the magnetic flux density through the second magnetic gap 433 can be adjusted by adjusting the width of the ring flange 133, the height and width of the isolation ring 70, and thus the width or height of the spacer 137. Therefore, by adjusting the distance between the first annular magnetic conduction plate 30 and the second annular magnetic conduction plate 40, the distance between the protruding portion 131 and the second annular magnetic conduction plate 40, and the width and height of the annular flange 133 and the isolation ring 70, the magnetic line density ratio of the first magnetic gap 431 and the second magnetic gap can be adjusted, and the required frequency response can be met according to the customized requirement.
In summary, the coaxial dual-voice coil speaker 1 can be independently driven by the first voice coil 61 and the second voice coil 63 for the high frequency and the low frequency bands, and can achieve a better sound analysis effect in the high frequency and the low frequency. In addition, the yoke 10 can be designed to be more shared to reduce the number of overall components, thereby achieving the effects of light weight, simple structure and rapid assembly. Furthermore, by adjusting the distance between the first annular magnetic conductive plate 30 and the second annular magnetic conductive plate 40, the distance between the protrusion 131 and the second annular magnetic conductive plate 40, and the width and height of the annular flange 133 and the isolation ring 70, the magnetic flux density can be adjusted, and the required frequency response can be met according to the customized requirement.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (10)
1. A coaxial dual voice coil speaker comprising:
the yoke comprises a bottom edge and a support column, wherein the support column extends from one end of the bottom edge, a protruding part and a ring flange are arranged at one end of the support column away from the bottom edge, the ring flange and the protruding part are positioned on the same surface of the support column, the ring flange surrounds the protruding part, and an annular groove is arranged between the ring flange and the protruding part;
the annular magnet comprises a first central shaft hole, and the support column penetrates through the first central shaft hole, so that the annular magnet is sleeved on the yoke and is contacted with the bottom edge;
the first annular magnetic conduction plate comprises a first central through hole, and the support column penetrates through the first central through hole, so that the first annular magnetic conduction plate is arranged on the annular magnet;
the bulge part penetrates through the isolation ring, so that the isolation ring is arranged in the annular groove;
the second annular magnetic conduction plate comprises a second central perforation, the second central perforation and the first central perforation have the same central axis, the protruding part penetrates through the second central perforation, the second annular magnetic conduction plate is arranged on the isolation ring, a first magnetic gap is arranged between the second annular magnetic conduction plate and the first annular magnetic conduction plate, and a second magnetic gap is arranged between the second annular magnetic conduction plate and the protruding part;
a first voice coil located in the first magnetic gap; and
and the second voice coil is positioned in the second magnetic gap.
2. The coaxial dual voice coil speaker of claim 1, wherein:
the isolation ring is an aluminum ring, the height of the isolation ring is higher than that of the ring flange, the height of the protruding part is higher than that of the ring flange, and a spacing part is arranged between the second annular magnetic conduction plate and the ring flange.
3. The coaxial dual voice coil speaker of claim 1, wherein:
the first annular magnetic conduction plate and the second annular magnetic conduction plate are approximately positioned at the same horizontal height.
4. The coaxial dual voice coil speaker of claim 1, wherein:
the diameter of the first central shaft hole is larger than that of the support column, so that an interval space is formed between the annular magnet and the support column.
5. The coaxial dual voice coil speaker of claim 1, wherein:
the thickness of the bottom edge decreases from the area proximate to the boss to the periphery.
6. The coaxial dual voice coil speaker of claim 1, wherein:
the thickness of the first annular magnetically permeable plate decreases from an area proximate the first central aperture to a perimeter.
7. The coaxial dual voice coil speaker of claim 1, wherein:
the second annular magnetic conduction plate further comprises a step part, and the step part is adjacent to the second central through hole.
8. The coaxial dual voice coil speaker of claim 1, wherein:
the first voice coil is a bass voice coil and the second voice coil is a treble voice coil.
9. The coaxial dual voice coil speaker of claim 1, wherein:
the isolation ring has a width greater than a width of the ring flange.
10. The coaxial dual voice coil speaker of claim 1, wherein:
the height of the ring magnet is substantially equal to the height of the bottom edge to the top end of the ring flange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201762550362P | 2017-08-25 | 2017-08-25 | |
| US62/550,362 | 2017-08-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109429151A CN109429151A (en) | 2019-03-05 |
| CN109429151B true CN109429151B (en) | 2023-12-01 |
Family
ID=63405071
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810971987.XA Active CN109429151B (en) | 2017-08-25 | 2018-08-24 | Coaxial double-voice coil loudspeaker |
| CN201821382532.6U Withdrawn - After Issue CN208754543U (en) | 2017-08-25 | 2018-08-24 | Coaxial double-coil loudspeaker |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821382532.6U Withdrawn - After Issue CN208754543U (en) | 2017-08-25 | 2018-08-24 | Coaxial double-coil loudspeaker |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3448061B1 (en) |
| CN (2) | CN109429151B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109429151B (en) * | 2017-08-25 | 2023-12-01 | 惠州迪芬尼声学科技股份有限公司 | Coaxial double-voice coil loudspeaker |
| CN217721457U (en) * | 2022-06-30 | 2022-11-01 | 瑞声光电科技(常州)有限公司 | Coaxial loudspeaker |
| CN218387875U (en) * | 2022-08-30 | 2023-01-24 | 瑞声光电科技(常州)有限公司 | Coaxial loudspeaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270488A (en) * | 1999-04-09 | 2000-10-18 | 张凡 | Loudspeaker |
| CN201657285U (en) * | 2010-01-11 | 2010-11-24 | 瑞声声学科技(深圳)有限公司 | Miniature double-magnetic-steel and double-voice-coil electromagnetic loudspeaker |
| CN103281655A (en) * | 2013-04-16 | 2013-09-04 | 沙文金 | Double-voice coil moving-coil loudspeaker |
| WO2014197652A1 (en) * | 2013-06-05 | 2014-12-11 | Harman International Industries, Inc. | Multi-way coaxial loudspeaker with internal magnet motor and permanent magnet cylinder |
| CN104782143A (en) * | 2012-09-17 | 2015-07-15 | 马格亚创新联盟 | Coaxial loudspeaker arrangement |
| CN105848064A (en) * | 2016-05-10 | 2016-08-10 | 青岛歌尔声学科技有限公司 | Dual-magnetic-gap magnetic path system and loudspeaker with same |
| CN208754543U (en) * | 2017-08-25 | 2019-04-16 | 惠州迪芬尼声学科技股份有限公司 | Coaxial double-coil loudspeaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9154883B2 (en) * | 2011-09-06 | 2015-10-06 | Apple Inc. | Low rise speaker assembly having a dual voice coil driver |
| GB2502189B (en) * | 2013-03-25 | 2014-06-04 | Tannoy Ltd | Loudspeaker |
| US9173035B2 (en) * | 2013-11-07 | 2015-10-27 | Harman International Industries, Incorporated | Dual coil moving magnet transducer |
-
2018
- 2018-08-24 CN CN201810971987.XA patent/CN109429151B/en active Active
- 2018-08-24 CN CN201821382532.6U patent/CN208754543U/en not_active Withdrawn - After Issue
- 2018-08-24 EP EP18190740.3A patent/EP3448061B1/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270488A (en) * | 1999-04-09 | 2000-10-18 | 张凡 | Loudspeaker |
| CN201657285U (en) * | 2010-01-11 | 2010-11-24 | 瑞声声学科技(深圳)有限公司 | Miniature double-magnetic-steel and double-voice-coil electromagnetic loudspeaker |
| CN104782143A (en) * | 2012-09-17 | 2015-07-15 | 马格亚创新联盟 | Coaxial loudspeaker arrangement |
| CN103281655A (en) * | 2013-04-16 | 2013-09-04 | 沙文金 | Double-voice coil moving-coil loudspeaker |
| WO2014197652A1 (en) * | 2013-06-05 | 2014-12-11 | Harman International Industries, Inc. | Multi-way coaxial loudspeaker with internal magnet motor and permanent magnet cylinder |
| CN105848064A (en) * | 2016-05-10 | 2016-08-10 | 青岛歌尔声学科技有限公司 | Dual-magnetic-gap magnetic path system and loudspeaker with same |
| CN208754543U (en) * | 2017-08-25 | 2019-04-16 | 惠州迪芬尼声学科技股份有限公司 | Coaxial double-coil loudspeaker |
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| Title |
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| Modeling, FEM analysis and dynamic simulation of a moving coil loudspeaker;Ezio Santini et al.;《2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion》;全文 * |
| Rx系列三分频全频扬声器;通博电子(香港)有限公司;《电声技术》;全文 * |
| 同轴双向传输、倍量发声扬声器;徐曙华;《电声技术》;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN208754543U (en) | 2019-04-16 |
| EP3448061A1 (en) | 2019-02-27 |
| EP3448061B1 (en) | 2019-11-13 |
| CN109429151A (en) | 2019-03-05 |
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Address after: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Applicant after: Huizhou Difenni Acoustic Technology Co.,Ltd. Address before: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Applicant before: Huizhou Ultrasonic Sound Co.,Ltd. |
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