CN109769183B - Loudspeaker - Google Patents
Loudspeaker Download PDFInfo
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- CN109769183B CN109769183B CN201910178877.2A CN201910178877A CN109769183B CN 109769183 B CN109769183 B CN 109769183B CN 201910178877 A CN201910178877 A CN 201910178877A CN 109769183 B CN109769183 B CN 109769183B
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- voice coil
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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
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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)
Abstract
The invention discloses a loudspeaker, which comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are accommodated in the shell, the vibration system comprises a diaphragm group and a voice coil group for driving the diaphragm group to vibrate, the diaphragm group comprises a main diaphragm and an auxiliary diaphragm, the voice coil group comprises a first voice coil and a second voice coil, the first voice coil is arranged between the main diaphragm and the auxiliary diaphragm, and the second voice coil is arranged on one side of the auxiliary diaphragm, which is far away from the main diaphragm. The loudspeaker comprises the first voice coil and the second voice coil, which is equivalent to disassembling a single voice coil structure into a double voice coil structure, and the auxiliary vibrating diaphragm is not arranged at the lower end of the second voice coil any more, but arranged between the first voice coil and the second voice coil, so that the mounting position of the auxiliary vibrating diaphragm is raised, the vibration space of the auxiliary vibrating diaphragm is increased, and the requirement of large-amplitude vibration of the auxiliary vibrating diaphragm is met.
Description
Technical Field
The invention relates to the technical field of acoustic devices, in particular to a loudspeaker.
Background
With the development of mobile phone technology, higher requirements are put on a loudspeaker, products are thinner and thinner, the amplitude is larger and larger, and the vibration space is smaller and smaller. When the product amplitude is great, the vibration system polarization problem can aggravate, adopt the double diaphragm system of main vibrating diaphragm and auxiliary vibrating diaphragm to restrain the polarization in the trade at present, however, traditional double diaphragm system generally adopts single voice coil structure, main vibrating diaphragm pastes in the upper end of voice coil loudspeaker voice coil, and auxiliary vibrating diaphragm pastes in the lower extreme of voice coil loudspeaker voice coil, because single voice coil loudspeaker voice coil's height is higher, it is great to result in auxiliary vibrating diaphragm to receive the space restriction, auxiliary vibrating diaphragm's book ring height is less, can't satisfy big amplitude vibration demand, and pat the basin frame when dodging in order to dodge the book ring portion of auxiliary vibrating diaphragm downwards vibration, need increase the groove structure at the upper surface of basin frame and dodge, when increasing process cost, press the position that corresponds the book ring portion of auxiliary vibrating diaphragm on the basin frame thinly, can cause the BL value to reduce, sensitivity descends, be unfavorable for promoting of product.
Disclosure of Invention
The invention mainly aims to provide a loudspeaker, and aims to solve the problem that the loudspeaker in the prior art cannot meet the requirement of large-amplitude vibration of an auxiliary diaphragm.
In order to achieve the above object, the present invention provides a speaker, which includes a housing, a vibration system and a magnetic circuit system, where the vibration system is accommodated in the housing, the vibration system includes a diaphragm group and a voice coil group for driving the diaphragm group to vibrate, the diaphragm group includes a main diaphragm and an auxiliary diaphragm, the voice coil group includes a first voice coil and a second voice coil, the first voice coil is disposed between the main diaphragm and the auxiliary diaphragm, and the second voice coil is disposed on a side of the auxiliary diaphragm away from the main diaphragm.
Preferably, the auxiliary diaphragm includes a first horizontal portion, a first ring-folding portion and a first fixing portion, the first horizontal portion is fixed between the first voice coil and the second voice coil, and the first fixing portion is fixed on the housing.
Preferably, the main vibrating diaphragm includes central part, second collar portion and the second fixed part that sets gradually from inside to outside, the second fixed part is fixed on the shell, first voice coil loudspeaker voice coil orientation the one end subsides of main vibrating diaphragm are located central part, first voice coil loudspeaker voice coil orientation the one end subsides of supplementary vibrating diaphragm are located first horizontal part, the second voice coil loudspeaker voice coil orientation the one end subsides of supplementary vibrating diaphragm are located first horizontal part.
Preferably, the first hinge portion protrudes in a direction away from the first voice coil, and the second hinge portion protrudes in a direction away from or toward the first voice coil.
Preferably, the vibration system further includes a centering branch piece, the centering branch piece is disposed between the first voice coil and the auxiliary vibrating diaphragm, the centering branch piece includes a base body and a conductive circuit disposed on the base body, one end of the conductive circuit is electrically connected to the first voice coil and the second voice coil, and the other end of the conductive circuit is electrically connected to an external circuit.
Preferably, the first and second voice coils are connected in series by the conductive circuit.
Preferably, the centering support piece comprises a support piece horizontal part, a support piece fixing part and a connecting part for connecting the support piece horizontal part and the support piece fixing part, the support piece fixing part is fixed on the shell, and the support piece horizontal part is fixed between the first voice coil and the auxiliary vibrating diaphragm.
Preferably, the number of the auxiliary diaphragms and the number of the centering branch pieces are two, and the two auxiliary diaphragms and the two centering branch pieces are arranged in a one-to-one correspondence manner.
Preferably, the first voice coil is formed by winding a first voice coil wire; the second voice coil is formed by winding a second voice coil wire, and the wire diameter of the first voice coil wire is different from that of the first voice coil wire.
Preferably, the magnetic circuit system comprises a basin frame fixed with the shell, a central magnet installed on the basin frame and edge magnets distributed on the outer side of the central magnet, a magnetic gap is formed between the central magnet and the edge magnets, and the first voice coil and the second voice coil are suspended in the magnetic gap.
In the technical scheme of the invention, the loudspeaker comprises the first voice coil and the second voice coil, which is equivalent to disassembling a single voice coil structure into a double voice coil structure, and the auxiliary vibrating diaphragm is not arranged at the lower end of the second voice coil any more, but arranged between the first voice coil and the second voice coil, so that the mounting position of the auxiliary vibrating diaphragm is raised, the vibration space of the auxiliary vibrating diaphragm is increased, and the requirement of large-amplitude vibration of the auxiliary vibrating diaphragm is met.
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 an exploded view of a speaker according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a speaker according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a vibration system and a frame of a loudspeaker according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a damper in a speaker according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating an assembly of a damper and first and second voice coils in a speaker according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Loudspeaker | 2511 | Horizontal part of |
| 10 | |
2512 | Connecting |
| 20 | |
2513 | Support |
| 21 | Main vibrating |
252 | |
| 211 | |
253 | |
| 212 | |
254 | |
| 213 | Second fixed |
255 | |
| 22 | Auxiliary vibrating |
26 | Reinforcing |
| 221 | The first |
30 | |
| 222 | |
31 | |
| 223 | First fixed |
32 | |
| 23 | |
33 | |
| 24 | |
34 | |
| 25 | |
40 | |
| 251 | |
401 | Sound outlet |
The implementation, functional features and advantages of the objects of the present invention will be further explained 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. 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 loudspeaker.
As shown in fig. 1 to 3, in the present embodiment, the speaker 100 includes a housing 10, a vibration system 20, and a magnetic circuit system 30, and the vibration system 20 and the magnetic circuit system 30 are accommodated in the housing 10. Wherein, vibration system 20 includes the voice coil loudspeaker voice coil group of diaphragm group and drive diaphragm group vibration, and the diaphragm group includes main vibrating diaphragm 21 and supplementary vibrating diaphragm 22, and the voice coil loudspeaker voice coil group includes first voice coil loudspeaker voice coil 23 and second voice coil loudspeaker voice coil 24, and first voice coil loudspeaker voice coil 23 sets up between main vibrating diaphragm 21 and supplementary vibrating diaphragm 22, and second voice coil loudspeaker voice coil 24 sets up the one side that deviates from main vibrating diaphragm 21 at supplementary vibrating diaphragm 22.
Specifically, as shown in fig. 2 and fig. 3, the main diaphragm 21, the first voice coil 23, the auxiliary diaphragm 22, and the second voice coil 24 of this embodiment are sequentially disposed from top to bottom, an upper end of the first voice coil 23 is attached to the lower surface of the main diaphragm 21, a lower end of the first voice coil 23 is attached to the upper surface of the auxiliary diaphragm 22, and an upper end of the second voice coil 24 is attached to the lower surface of the auxiliary diaphragm 22. The loudspeaker 100 of the present embodiment includes the first voice coil 23 and the second voice coil 24, which is equivalent to disassembling the single voice coil structure into the double voice coil structure, and the auxiliary diaphragm 22 is no longer disposed at the lower end of the second voice coil 24, but the auxiliary diaphragm 22 is disposed between the first voice coil 23 and the second voice coil 24, so that the mounting position of the auxiliary diaphragm 22 is raised, the vibration space of the auxiliary diaphragm 22 is increased, and the requirement of large-amplitude vibration of the auxiliary diaphragm 22 is met.
The auxiliary diaphragm 22 of this embodiment includes a first horizontal portion 221, a first ring-folding portion 222 and a first fixing portion 223, which are sequentially disposed from inside to outside, wherein the first horizontal portion 221 is fixed between the first voice coil 23 and the second voice coil 24, and the first fixing portion 223 is fixed on the housing 10, so as to fix two sides of the auxiliary diaphragm 22, and facilitate the vibration of the first ring-folding portion 222. Compared with the loudspeaker 100 with a single voice coil structure, the loudspeaker 100 of the present embodiment has a smaller limit on the vibration space of the first hinge portion 222 due to the raised installation position of the auxiliary diaphragm 22, that is, the first hinge portion 222 has a sufficient vibration space, so that the height of the first hinge portion 222 can be increased, which is beneficial to improving the acoustic performance of the loudspeaker 100.
The main diaphragm 21 of this embodiment includes a central portion 211, a second flange portion 212 and a second fixing portion 213, which are sequentially disposed from inside to outside, the second fixing portion 213 is fixed on the housing 10, one end of the first voice coil 23 facing the main diaphragm 21 is attached to the central portion 211, one end of the first voice coil 23 facing the auxiliary diaphragm 22 is attached to the first horizontal portion 221, and one end of the second voice coil 24 facing the auxiliary diaphragm 22 is attached to the first horizontal portion 221.
Specifically, the central portion 211 of the main diaphragm 21 covers the upper end of the first voice coil 23, the lower end of the first voice coil 23 is attached to the upper surface of the first horizontal portion 221 of the auxiliary diaphragm 22, and the upper end of the second voice coil 24 is attached to the lower surface of the auxiliary diaphragm 22, so that the voice coil group drives the diaphragm group to vibrate, that is, the first voice coil 23 and the second voice coil 24 drive the main diaphragm 21 and the auxiliary module to vibrate simultaneously, and the structural design is reasonable.
In this embodiment, the first flange portion 222 protrudes in a direction away from the first voice coil 23, and the second flange portion 212 protrudes in a direction away from or toward the first voice coil 23, that is, the arc-shaped protruding side of the first flange portion 222 faces upward, and the arc-shaped protruding side of the second flange portion 212 faces downward or faces upward. The first flange part 222 and the second flange part 212 can form a symmetrical support, and can provide a symmetrical restoring force when the voice coil group vibrates, so that the distortion of a product is reduced, and the reliability is improved.
In this embodiment, the vibration system 20 further includes a spider 25, the spider 25 is disposed between the first voice coil 23 and the auxiliary diaphragm 22, the spider 25 includes a base 251 and a conductive circuit (not shown) disposed on the base 251, one end of the conductive circuit is electrically connected to the first voice coil 23 and the second voice coil 24, and the other end of the conductive circuit is electrically connected to an external circuit, specifically, the other end of the conductive circuit may be electrically connected to a terminal, such as a mobile phone, so as to energize the first voice coil 23 and the second voice coil 24. The centering support 25 plays a role in positioning, and can ensure that the first voice coil 23 and the second voice coil 24 reciprocate along the axial direction, so as to inhibit the first voice coil 23 and the second voice coil 24 from generating polarization problems. In addition, the centering support 25 is disposed between the first voice coil 23 and the auxiliary diaphragm 22, so that the polarization problem can be suppressed, and the vibration space of the auxiliary diaphragm 22 can be ensured, thereby meeting the requirement of large-amplitude vibration of the auxiliary diaphragm 22.
In this embodiment, the first voice coil 23 and the second voice coil 24 are connected in series through a conductive circuit, which is beneficial to the synchronous up-and-down motion of the first voice coil 23 and the second voice coil 24, and ensures the synchronization of the vibration of the main diaphragm 21 and the auxiliary diaphragm 22.
Specifically, the base 251 of the present embodiment includes a support horizontal portion 2511, a support fixing portion 2513, and a connecting portion 2512 connecting the support horizontal portion 2511 and the support fixing portion 2513, the support fixing portion 2513 is fixed on the housing 10, the support horizontal portion 2511 is fixed between the first voice coil 23 and the auxiliary diaphragm 22 to fix both sides of the centering support 25, and the centering support 25 has elasticity and can move along with the axial reciprocating movement of the voice coil set and the diaphragm set, and is reasonable in structural design, simple and convenient.
In this embodiment, the number of the auxiliary diaphragms 22 and the number of the centering pads 25 are both two, and the two auxiliary diaphragms 22 and the two centering pads 25 are arranged in a one-to-one correspondence manner. The two auxiliary vibrating diaphragms 22 are arranged in a bilateral symmetry mode, the two auxiliary vibrating diaphragms 22 vibrate synchronously to keep the balance of the sound production of the loudspeaker 100, the two centering branch pieces 25 are also arranged in a bilateral symmetry mode, and the two centering branch pieces and the two auxiliary vibrating diaphragms 22 are arranged in a one-to-one correspondence mode, so that the polarization problem of the first voice coil 23 and the second voice coil 24 is further suppressed.
Specifically, as shown in fig. 4 and 5, the conductive circuit of each of the centering branch pieces 25 includes two pads, wherein the two pads of one centering branch piece 25 are respectively a first pad 252 and a second pad 253, and the two pads of the other centering branch piece 25 are respectively a third pad 254 and a fourth pad 255, wherein the first pad 252 and the second pad 253 are conductive, and the third pad 254 and the fourth pad 255 are non-conductive. In order to realize the series connection of the first voice coil 23 and the second voice coil 24, and the currents of the first voice coil 23 and the second voice coil 24 are consistent, in an embodiment, the third pad 254 is made conductive with the start line of the first voice coil 23, the first pad 252 is made conductive with the end line of the first voice coil 23, the second pad 253 is made conductive with the start line of the second voice coil 24, and the fourth pad 255 is made conductive with the end line of the second voice coil 24; in another embodiment, the third pad 254 is made conductive with the start line of the second voice coil 24, the first pad 252 is made conductive with the end line of the second voice coil 24, the second pad 253 is made conductive with the start line of the first voice coil 23, and the fourth pad 255 is made conductive with the end line of the first voice coil 23; in another embodiment, the third pad 254 is made conductive to the start line of the first voice coil 23, the second pad 253 is made conductive to the end line of the first voice coil 23, the first pad 252 is made conductive to the start line of the second voice coil 24, and the fourth pad 255 is made conductive to the end line of the first voice coil 23; in other embodiments, other connection manners may also be adopted, it is required to ensure that the first voice coil 23 and the second voice coil 24 are connected in series, and the currents of the first voice coil 23 and the second voice coil 24 are the same.
The first voice coil 23 of the present embodiment is formed by winding the first voice coil 23; the second voice coil 24 is formed by winding the second voice coil 24, the wire diameter of the first voice coil 23 wire is different from that of the first voice coil 23 wire, the free matching of the height, the resistance and the weight of the first voice coil 23 and the second voice coil 24 can be realized, and different use requirements are met.
As shown in fig. 1 to 3, in the present embodiment, the magnetic circuit system 30 includes a frame 31 fixed to the housing 10, a central magnet 32 mounted on the frame 31, and side magnets 33 distributed outside the central magnet 32, a magnetic gap is formed between the central magnet 32 and the variable magnet, and the first voice coil 23 and the second voice coil 24 are both suspended in the magnetic gap. The magnetic gap of the magnetic circuit system 30 generates a magnetic field, and the first voice coil 23 and the second voice coil 24 perform reciprocating magnetic line-cutting motion in the magnetic gap to drive the main diaphragm 21 and the auxiliary diaphragm 22 to vibrate, so that air is driven to sound, and energy conversion between electric sounds is completed. In order to correct the magnetic force generated by the central magnet 32, the magnetic circuit system 30 of the present embodiment further includes a central washer 34 disposed on the central magnet 32.
In addition, because the first collar portion 222 of the auxiliary diaphragm 22 has sufficient vibration space, a groove structure does not need to be added on the upper surface of the basin frame 31, that is, the position of the basin frame 31 corresponding to the first collar portion 222 of the auxiliary diaphragm 22 cannot be thinned, so that the sensitivity is improved, and the product performance is improved.
The vibration system 20 of the speaker 100 of the present embodiment further includes a reinforcing portion 26 provided at an upper end of the first voice coil 23 to adjust the acoustic performance of the speaker 100. The speaker 100 of the present embodiment further includes a front cover 40, the front cover 40 and the housing 10 cooperate to form a protective frame, and the front cover 40 is provided with a sound outlet 401 through which sound is emitted.
The above description is only a preferred embodiment of the present invention, and 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 (9)
1. A loudspeaker comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are accommodated in the shell, and the loudspeaker is characterized in that the vibration system comprises a diaphragm group and a voice coil group for driving the diaphragm group to vibrate, the diaphragm group comprises a main diaphragm and an auxiliary diaphragm, the voice coil group comprises a first voice coil and a second voice coil, the first voice coil is arranged between the main diaphragm and the auxiliary diaphragm, and the second voice coil is arranged on one side of the auxiliary diaphragm, which is far away from the main diaphragm; the vibration system further comprises a centering support piece, the centering support piece is arranged between the first voice coil and the auxiliary vibrating diaphragm, the centering support piece comprises a base body and a conductive circuit arranged on the base body, one end of the conductive circuit is electrically connected with the first voice coil and the second voice coil, and the other end of the conductive circuit is electrically connected with an external circuit.
2. The speaker of claim 1, wherein the auxiliary diaphragm includes a first horizontal portion, a first hinge portion, and a first fixing portion, the first horizontal portion being fixed between the first voice coil and the second voice coil, the first fixing portion being fixed to the housing.
3. The loudspeaker of claim 2, wherein the main diaphragm includes a central portion, a second folded portion and a second fixing portion, the second fixing portion is fixed on the housing, an end of the first voice coil facing the main diaphragm is attached to the central portion, an end of the first voice coil facing the auxiliary diaphragm is attached to the first horizontal portion, and an end of the second voice coil facing the auxiliary diaphragm is attached to the first horizontal portion.
4. The speaker of claim 3, wherein the first collar portion projects in a direction away from the first voice coil, and the second collar portion projects in a direction away from or toward the first voice coil.
5. The loudspeaker of claim 1, wherein the first voice coil and the second voice coil are connected in series by the conductive circuit.
6. The speaker of claim 1, wherein the base includes a stay horizontal portion, a stay fixing portion, and a connecting portion connecting the stay horizontal portion and the stay fixing portion, the stay fixing portion being fixed to the housing, the stay horizontal portion being fixed between the first voice coil and the auxiliary diaphragm.
7. The loudspeaker of claim 1, wherein the number of said auxiliary diaphragms and the number of said centering pads are both two, and two of said auxiliary diaphragms and two of said centering pads are arranged in one-to-one correspondence.
8. The loudspeaker according to any one of claims 1 to 7 wherein the first voice coil is formed by winding a first voice coil wire; the second voice coil is formed by winding a second voice coil wire, and the wire diameter of the first voice coil wire is different from that of the first voice coil wire.
9. The loudspeaker according to any one of claims 1 to 7, wherein the magnetic circuit system comprises a frame fixed to the enclosure, a central magnet mounted on the frame, and edge magnets distributed outside the central magnet, a magnetic gap being formed between the central magnet and the edge magnets, the first voice coil and the second voice coil being suspended in the magnetic gap.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910178877.2A CN109769183B (en) | 2019-03-08 | 2019-03-08 | Loudspeaker |
| PCT/CN2019/129716 WO2020181887A1 (en) | 2019-03-08 | 2019-12-30 | Loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910178877.2A CN109769183B (en) | 2019-03-08 | 2019-03-08 | Loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109769183A CN109769183A (en) | 2019-05-17 |
| CN109769183B true CN109769183B (en) | 2020-11-13 |
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ID=66458142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910178877.2A Active CN109769183B (en) | 2019-03-08 | 2019-03-08 | Loudspeaker |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109769183B (en) |
| WO (1) | WO2020181887A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769183B (en) * | 2019-03-08 | 2020-11-13 | 歌尔股份有限公司 | Loudspeaker |
| GB2588809B (en) * | 2019-11-08 | 2023-11-08 | B & W Group Ltd | Improvements in and relating to loudspeaker spiders |
| WO2021127926A1 (en) * | 2019-12-23 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Loudspeaker |
| CN111641907B (en) * | 2020-06-24 | 2021-07-09 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN111935613B (en) * | 2020-10-13 | 2021-02-05 | 歌尔股份有限公司 | Loudspeaker |
| CN113473333B (en) * | 2021-06-28 | 2023-04-11 | Oppo广东移动通信有限公司 | Electroacoustic device and electronic apparatus |
| CN114679674B (en) * | 2022-03-29 | 2024-06-18 | 维沃移动通信有限公司 | Speaker and electronic equipment |
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| CN201708916U (en) * | 2009-11-20 | 2011-01-12 | 天津中环真美声学技术有限公司 | Ultrathin double-drive loudspeaker |
| CN207354585U (en) * | 2017-08-28 | 2018-05-11 | 常州美欧电子有限公司 | Magnetic speaker |
| CN207625792U (en) * | 2017-11-27 | 2018-07-17 | 瑞声科技(新加坡)有限公司 | Loud speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109769183A (en) | 2019-05-17 |
| WO2020181887A1 (en) | 2020-09-17 |
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