CN212324356U - Dual-drive loudspeaker capable of producing sound on two sides - Google Patents
Dual-drive loudspeaker capable of producing sound on two sides Download PDFInfo
- Publication number
- CN212324356U CN212324356U CN202021973998.0U CN202021973998U CN212324356U CN 212324356 U CN212324356 U CN 212324356U CN 202021973998 U CN202021973998 U CN 202021973998U CN 212324356 U CN212324356 U CN 212324356U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic steel
- dual
- circuit system
- voice coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
A dual-drive double-sided sounding loudspeaker comprises a first vibration system and a first magnetic circuit system which are assembled into a first sounding body, and a second vibration system and a second magnetic circuit system which are assembled into a second sounding body; the first sounding body and the second sounding body are symmetrically arranged by taking the shared magnetic conduction plate as a symmetrical plane. Furthermore, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the shared magnetic conduction plate, the first vibration system is installed on the outer side of the first magnetic circuit system, and the second vibration system is installed on the outer side of the second magnetic circuit system. The double-vibrating-diaphragm vibration sounding can enhance the sound pressure of the double-vibrating-diaphragm through the guiding of the cavity during the assembly of the whole machine, thereby improving the sound. The method is beneficial to the linear design of the horn vibration, and is easy to design and reduce the nonlinear distortion; noise generated by abnormal polarization in loudspeaker vibration is avoided; the method is favorable for avoiding the abnormal disconnection caused by mechanical fatigue and improving the yield of products.
Description
Technical Field
The utility model relates to a speaker especially relates to a speaker of two-sided sound production of dual drive.
Background
With the development of intellectualization and portability of electronic products, the requirements on the existing micro-speaker are higher and higher, and more requirements are mainly reflected in the aspects of small product size, large sound pressure, small distortion, high bearable power and the like. Aiming at the requirements, the following technical routes are implemented:
1. the external magnet (4-edge magnet) and the internal magnet are combined in a parallel connection mode through the magnetic conduction plate to form five magnets, and magnetic lines of force are gathered through the magnetic conduction plate;
2. a single voice coil energized with a varying current produces a lorentn magnetic up and down motion in a magnetic field;
3. the movement of the coil drives the single voice film to push air so as to generate sound.
The loudspeaker of the above technical route can refer to the existing loudspeaker design structure shown in fig. 1, and comprises a diaphragm 91, a voice coil 92, a magnetic circuit assembly 93 and a frame 94, wherein the diaphragm 91 comprises a corrugated rim 911 and a dome 912 arranged on the corrugated rim 911, and the voice coil 92 is connected and arranged on the corrugated rim 911. The magnetic circuit assembly 93 comprises an internal magnetic steel 930, an internal magnetic conduction plate 931 is arranged above the internal magnetic steel 930, and an annular magnetic conduction plate 932 is arranged outside the internal magnetic conduction plate 931; four external magnetic steels 933 are arranged around the internal magnetic steel 930, and lower magnetic conductive plates 934 are arranged below the internal magnetic steel 930 and the external magnetic steels 933. A gap for the voice coil 92 to pass through is arranged between the inner magnetic conducting plate 931 and the annular magnetic conducting plate 932; the voice coil 92 is at least partially suspended between the inner magnetic steel 930 and the outer magnetic steel 933. The diaphragm 91, the voice coil 92 and the magnetic circuit component 93 are mounted in a basin frame 94, a soldering terminal 941 is arranged on the basin frame 94, and the soldering terminal 941 is connected with a coil lead of the voice coil 92 and a connecting line for feeding an electric signal externally respectively.
However, the above-mentioned technical route also has some significant drawbacks:
1. in order to meet the requirement of higher sound pressure, a magnetic circuit gap is designed to be narrower so as to obtain higher magnetic force performance, however, the narrower magnetic circuit gap easily causes noise generated by the voice coil rubbing ring when the vibrating diaphragm is polarized;
2. under larger amplitude, the lead wire is easy to break when the coil vibrates, so that the bearable power is low;
3. the lower magnetic conduction plate has magnetic leakage phenomenon, and the utilization rate of magnetic performance is lower.
SUMMERY OF THE UTILITY MODEL
In view of the above circumstances, the present invention provides a dual-drive dual-side speaker, in order to solve the above-mentioned problems.
The dual-drive double-sided sounding loudspeaker comprises a first vibration system and a first magnetic circuit system which are assembled into a first sounding body, and a second vibration system and a second magnetic circuit system which are assembled into a second sounding body; still include sharing magnetic conduction board, first sound generator with the second sound generator with sharing magnetic conduction board is the plane of symmetry setting.
Further, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conduction plate, the first vibration system is installed on the outer side of the first magnetic circuit system, and the second vibration system is installed on the outer side of the second magnetic circuit system.
Furthermore, the first magnetic circuit system comprises a first inner magnetic steel and a first outer magnetic steel arranged around the first inner magnetic steel, a first middle magnetic conduction plate is arranged on one side of the first inner magnetic steel, a first annular magnetic conduction plate is arranged around the first middle magnetic conduction plate, and a common magnetic conduction plate is arranged on the other side of the first inner magnetic steel; the second magnetic circuit system comprises second inner magnetic steel and second outer magnetic steel arranged around the second inner magnetic steel, a second middle magnetic conduction plate is arranged on one side of the second inner magnetic steel, a second annular magnetic conduction plate is arranged around the second middle magnetic conduction plate, and the other side of the second inner magnetic steel is a shared magnetic conduction plate.
Preferably, the first outer magnetic steel is four magnetic steel bars distributed around the first inner magnetic steel, and the second outer magnetic steel is four magnetic steel bars distributed around the second inner magnetic steel.
Further, the first vibration system comprises a first diaphragm and a first voice coil, the first diaphragm comprises a first folding ring and a first dome arranged on the first folding ring, and the first voice coil is connected and arranged on the first folding ring; the second vibration system comprises a second diaphragm and a second voice coil, the second diaphragm comprises a second folding ring and a second spherical top arranged on the second folding ring, and the second voice coil is connected to the second folding ring.
Furthermore, the first magnetic circuit system is provided with a first inner magnetic steel and a first outer magnetic steel arranged around the first inner magnetic steel, one side of the first inner magnetic steel is provided with a first middle magnetic conduction plate, and a first annular magnetic conduction plate is arranged around the first middle magnetic conduction plate; and a gap for a first voice coil to pass through is arranged between the first middle magnetic conductive plate and the first annular magnetic conductive plate, and at least part of the first voice coil is suspended between the first inner magnetic steel and the first outer magnetic steel.
Furthermore, the second magnetic circuit system is provided with a second inner magnetic steel and a second outer magnetic steel arranged around the second inner magnetic steel, one side of the second inner magnetic steel is provided with a second middle magnetic conduction plate, and a second annular magnetic conduction plate is arranged around the second middle magnetic conduction plate; and a gap for a second voice coil to pass through is arranged between the second middle magnetic conductive plate and the second annular magnetic conductive plate, and at least part of the second voice coil is suspended between the second inner magnetic steel and the second outer magnetic steel.
Furthermore, the first vibration system and the first magnetic circuit system are arranged on a first basin frame, and a first soldering lug is further arranged on the first basin frame; the second vibration system and the second magnetic circuit system are installed on the second basin frame, and a second soldering lug is further arranged on the second basin frame.
Preferably, the first soldering lug is respectively connected with a coil lead of a first voice coil arranged in the first vibration system and a connecting wire for feeding an electric signal to the outside; and the second soldering lug is respectively connected with a coil lead of a second voice coil arranged in the second vibration system and a connecting wire for feeding an electric signal into the outside.
Preferably, the first soldering lug and a coil lead of a first voice coil arranged in a first vibration system, the second soldering lug and a coil lead of a second voice coil arranged in a second vibration system, and the first soldering lug and the second soldering lug are connected in series and then connected with a connecting wire for feeding an electric signal externally.
After the technology provided by the utility model is adopted, according to the utility model discloses a technical scheme has following beneficial effect:
1) the double-vibrating-diaphragm vibration sounding can enhance the sound pressure of the double-vibrating-diaphragm through the guiding of the cavity during the assembly of the whole machine, thereby improving the sound.
2) A large amplitude system is decomposed into an upper mirror image system and a lower mirror image system, and the amplitude of each system is only half of the large amplitude. Therefore, the following advantages are provided:
the method is beneficial to the linear design of the horn vibration, and is easy to design and reduce the nonlinear distortion;
noise generated by abnormal polarization in loudspeaker vibration is avoided;
the method is favorable for avoiding the abnormal disconnection caused by mechanical fatigue and improving the yield of products.
3) The magnetic circuit between the two horns can supplement magnetic energy mutually to increase the utilization rate of the magnetic energy.
4) The two voice coils can be driven by series or parallel power supply according to the design of an audio circuit; and the drive of two voice coils can be set as synchronous drive, and the vibration direction is mirror image vibration.
Drawings
FIG. 1 is an exploded view of a prior art speaker design;
FIG. 2 is an exploded view of a dual-drive dual-sided acoustic speaker according to an embodiment of the present application;
fig. 3 is a cross-sectional structure diagram of a dual-drive dual-side sounding speaker according to an embodiment of the present application.
Description of reference numerals:
second outer magnetic steel 233 of first diaphragm 11
The first voice coil 12 shares the magnetic conduction plate 5
First inner magnetic steel 130 diaphragm 91
First intermediate magnetic conductive plate 131 folded ring 911
First annular magnetic conductive plate 132 dome 912
First external magnet 133 Voice coil 92
Magnetic conductive plate 931 in second diaphragm 21
Second folded ring 211 annular magnetic conducting plate 932
Second ball top 212 external magnetic steel 933
Lower magnetic conductive plate 934 of second voice coil 22
Second inner magnetic steel 230 basin stand 94
Soldering terminal 941 of second middle magnetic conductive plate 231
Second annular magnetic conductive plate 232
Detailed Description
The present invention will be described in further detail with reference to embodiments shown in the drawings. The described embodiments include various specific details to aid understanding, but they are to be construed as merely illustrative, and not restrictive of all embodiments of the invention. Meanwhile, in order to make the description more clear and concise, a detailed description of functions and configurations well known in the art will be omitted.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "upper", "lower" or "above" and "below" in the present application refer to the upper and lower relationships as generally illustrated in the drawings of the present application. When the placement state changes, for example, when the placement state is turned over, the corresponding positional relationship should be changed accordingly to understand or implement the technical solution of the present application.
As shown in fig. 2 and 3, a dual-drive dual-sided sound speaker includes a first vibration system and a first magnetic circuit system assembled as a first sound generating body, and a second vibration system and a second magnetic circuit system assembled as a second sound generating body; still include sharing magnetic conduction board 5, first sound producing body with second sound producing body with sharing magnetic conduction board 5 sets up for the plane of symmetry. In view of the fact that the common magnetic conductive plate is a part with a certain thickness, the first sound generator and the second sound generator can be regarded as being symmetrically arranged by taking the central plane of the common magnetic conductive plate as a symmetry plane.
Further, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conduction plate 5, the first vibration system is installed on the outer side of the first magnetic circuit system, and the second vibration system is installed on the outer side of the second magnetic circuit system.
Furthermore, the first magnetic circuit system comprises a first inner magnetic steel 130 and a first outer magnetic steel 133 arranged around the first inner magnetic steel 130, one side of the first inner magnetic steel 130 is provided with a first middle magnetic conduction plate 131, the periphery of the first middle magnetic conduction plate 131 is provided with a first annular magnetic conduction plate 132, and the other side of the first inner magnetic steel 130 is provided with a common magnetic conduction plate 5; the second magnetic circuit system comprises a second inner magnetic steel 230 and a second outer magnetic steel 233 arranged around the second inner magnetic steel 230, a second middle magnetic conduction plate 231 is arranged on one side of the second inner magnetic steel 230, a second annular magnetic conduction plate 232 is arranged around the second middle magnetic conduction plate 231, and the other side of the second inner magnetic steel 230 is a shared magnetic conduction plate 5.
Further, the first outer magnetic steel 133 is four magnetic steel bars distributed around the first inner magnetic steel 130, and the second outer magnetic steel 233 is four magnetic steel bars distributed around the second inner magnetic steel 230.
The first vibration system comprises a first diaphragm 11 and a first voice coil 12, the first diaphragm 11 comprises a first folding ring 111 and a first dome 112 arranged on the first folding ring 111, and the first voice coil 12 is connected and arranged on the first folding ring 111; the second vibration system comprises a second diaphragm 21 and a second voice coil 22, the second diaphragm 21 comprises a second folded ring 211 and a second spherical cap 212 arranged on the second folded ring 211, and the second voice coil 22 is connected to the second folded ring 211.
Further, a gap is provided between the first intermediate magnetic conductive plate 131 and the first annular magnetic conductive plate 132 for the first voice coil 12 to pass through, and the first voice coil 12 is at least partially suspended between the first inner magnetic steel 130 and the first outer magnetic steel 133.
Further, a gap is provided between the second intermediate magnetic conductive plate 231 and the second annular magnetic conductive plate 232 for the second voice coil 22 to pass through, and the second voice coil 22 is at least partially suspended between the second inner magnetic steel 230 and the second outer magnetic steel 233.
The first vibration system and the first magnetic circuit system are arranged on the first basin frame 14, and the first basin frame 14 is also provided with a first soldering lug 141; the second vibration system and the second magnetic circuit system are mounted on the second frame 24, and the second frame 24 is further provided with a second soldering lug 241.
As a specific embodiment, the first soldering lug 141 is connected to a coil lead of the first voice coil 12 provided in the first vibration system and a connection line for externally feeding an electric signal; the second bonding pad 241 is connected to a coil lead of the second voice coil 22 provided in the second vibration system and a connection line for feeding an electric signal from the outside.
As another specific embodiment, the first tab 141 and the coil lead of the first voice coil 12 disposed in the first vibration system, the second tab 241 and the coil lead of the second voice coil 22 disposed in the second vibration system, and the first tab 141 and the second tab 241 are connected in series and then connected to a connection line for feeding an electrical signal externally.
According to the dual-drive double-sided sounding loudspeaker of the embodiment, compared with the prior art, two independent five-magnetic loudspeakers are combined together in a mirror image mode through the shared magnetic conduction plate to form the double-sided mirror image loudspeaker, the shared magnetic conduction plate serves as a symmetrical surface of the two independent loudspeakers, and the shared magnetic conduction plate serves as a part of the first magnetic circuit system and a part of the second magnetic circuit system. The two independent loudspeakers described herein are still distinguished from the loudspeakers of the prior art in terms of their sound-producing functions and their complete components, mainly in that an independent lower magnetic conductive plate is eliminated, but a common magnetic conductive plate is used instead of the two lower magnetic conductive plates.
According to the dual-drive double-sided sounding loudspeaker of the embodiment, compared with the prior art, the magnetic circuit between the inner magnetic circuit and the outer magnetic circuit is combined in parallel through the magnetic conduction plates, the upper loudspeaker and the lower loudspeaker are also combined in parallel through the magnetic conduction plates, the magnetic circuits between the two loudspeakers can supplement magnetic energy mutually, and the magnetic energy utilization rate is increased.
According to the dual-drive double-sided sounding loudspeaker of the embodiment, compared with the prior art, the two voice coils can be driven by series or parallel power supply according to the design of the audio circuit; and the drive of two voice coils can be set as synchronous drive, and the vibration direction is mirror image vibration.
Compared with the prior art, the dual-drive double-sided sounding loudspeaker according to the above embodiment has the following beneficial effects through the above improvement:
1. the double-vibrating-diaphragm sound is produced by vibration, and the sound pressure of the double-vibrating-diaphragm can be enhanced through the guidance of the cavity during the assembly of the whole machine, so that the sound is improved;
2. a large amplitude system is decomposed into an upper mirror image system and a lower mirror image system, and the amplitude of each system is only half of the large amplitude. Therefore, the following advantages are provided:
2.1, the linear design of the horn vibration is facilitated, and the nonlinear distortion is reduced by the design easily;
2.2, noise generated by polarization abnormity in horn vibration is avoided;
2.3 the method is favorable for avoiding the abnormal disconnection caused by mechanical fatigue and improving the yield of products.
Claims (10)
1. A dual-drive double-sided sounding loudspeaker is characterized by comprising a first vibration system and a first magnetic circuit system which are assembled into a first sounding body, and a second vibration system and a second magnetic circuit system which are assembled into a second sounding body; still include sharing magnetic conduction board (5), first sound generator with the second sound generator with sharing magnetic conduction board (5) set up as the plane of symmetry.
2. A dual-drive dual-side sound production speaker according to claim 1, wherein said first magnetic circuit system and said second magnetic circuit system are symmetrically disposed with respect to said common magnetic conductive plate (5), said first vibration system is installed outside said first magnetic circuit system, and said second vibration system is installed outside said second magnetic circuit system.
3. A dual-drive dual-side sound speaker according to claim 1, wherein said first magnetic circuit system includes a first inner magnetic steel (130) and a first outer magnetic steel (133) disposed around said first inner magnetic steel (130), a first middle magnetic conductive plate (131) is disposed on one side of said first inner magnetic steel (130), a first annular magnetic conductive plate (132) is disposed around said first middle magnetic conductive plate (131), and a common magnetic conductive plate (5) is disposed on the other side of said first inner magnetic steel (130); the second magnetic circuit system comprises a second inner magnetic steel (230) and a second outer magnetic steel (233) arranged on the periphery of the second inner magnetic steel (230), a second middle magnetic conduction plate (231) is arranged on one side of the second inner magnetic steel (230), a second annular magnetic conduction plate (232) is arranged on the periphery of the second middle magnetic conduction plate (231), and the other side of the second inner magnetic steel (230) is a shared magnetic conduction plate (5).
4. A dual-drive dual-sided sound producing speaker as claimed in claim 3, wherein said first outer magnetic steel (133) is four magnetic steel bars disposed around said first inner magnetic steel (130), and said second outer magnetic steel (233) is four magnetic steel bars disposed around said second inner magnetic steel (230).
5. A dual-drive dual-side sound speaker according to any one of claims 1-4, wherein said first vibration system comprises a first diaphragm (11) and a first voice coil (12), said first diaphragm (11) comprises a first corrugated rim (111) and a first dome (112) disposed on the first corrugated rim (111), and said first voice coil (12) is connected to and disposed on said first corrugated rim (111); the second vibration system comprises a second diaphragm (21) and a second voice coil (22), the second diaphragm (21) comprises a second folding ring (211) and a second spherical top (212) arranged on the second folding ring (211), and the second voice coil (22) is connected and arranged on the second folding ring (211).
6. A dual-drive double-sided sound production loudspeaker according to claim 5, wherein the first magnetic circuit system is provided with a first inner magnetic steel (130) and a first outer magnetic steel (133) arranged around the first inner magnetic steel (130), one side of the first inner magnetic steel (130) is provided with a first middle magnetic conductive plate (131), and the first middle magnetic conductive plate (131) is provided with a first annular magnetic conductive plate (132) around; a gap for the first voice coil (12) to pass through is arranged between the first middle magnetic conduction plate (131) and the first annular magnetic conduction plate (132), and at least part of the first voice coil (12) is suspended between the first inner magnetic steel (130) and the first outer magnetic steel (133).
7. A dual-drive dual-face sound production loudspeaker according to claim 5, wherein the second magnetic circuit system is provided with a second inner magnetic steel (230) and a second outer magnetic steel (233) arranged around the second inner magnetic steel (230), one side of the second inner magnetic steel (230) is provided with a second middle magnetic conductive plate (231), and the periphery of the second middle magnetic conductive plate (231) is provided with a second annular magnetic conductive plate (232); a gap for the second voice coil (22) to pass through is arranged between the second middle magnetic conductive plate (231) and the second annular magnetic conductive plate (232), and at least part of the second voice coil (22) is suspended between the second inner magnetic steel (230) and the second outer magnetic steel (233).
8. A dual-drive dual-sided sound production speaker according to any one of claims 1 to 4, wherein the first vibration system and the first magnetic circuit system are mounted on a first frame (14), and a first soldering lug (141) is further provided on the first frame (14); the second vibration system and the second magnetic circuit system are installed on the second basin frame (24), and a second welding piece (241) is further arranged on the second basin frame (24).
9. The dual-drive dual-sided sound production speaker according to claim 8, wherein the first soldering terminal (141) is connected to a coil lead of a first voice coil (12) provided in the first vibration system and a connection line for feeding an electric signal from outside; and the second welding lug (241) is respectively connected with a coil lead of a second voice coil (22) arranged in the second vibration system and a connecting wire for feeding an electric signal from the outside.
10. A dual-drive dual-side speaker according to claim 8, wherein said first bonding pad (141) is connected to a coil lead of a first voice coil (12) disposed in a first vibration system, said second bonding pad (241) is connected to a coil lead of a second voice coil (22) disposed in a second vibration system, and said first bonding pad (141) and said second bonding pad (241) are connected in series and then connected to a connection line for feeding an electrical signal externally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021973998.0U CN212324356U (en) | 2020-09-11 | 2020-09-11 | Dual-drive loudspeaker capable of producing sound on two sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021973998.0U CN212324356U (en) | 2020-09-11 | 2020-09-11 | Dual-drive loudspeaker capable of producing sound on two sides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212324356U true CN212324356U (en) | 2021-01-08 |
Family
ID=74036188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021973998.0U Active CN212324356U (en) | 2020-09-11 | 2020-09-11 | Dual-drive loudspeaker capable of producing sound on two sides |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212324356U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073882A (en) * | 2020-09-11 | 2020-12-11 | 常州市润蒙声学科技有限公司 | Dual-drive loudspeaker capable of producing sound on two sides |
| CN113068105A (en) * | 2021-05-07 | 2021-07-02 | 台湾立讯精密有限公司 | Double-sided loudspeaker device |
| WO2024045236A1 (en) * | 2022-08-30 | 2024-03-07 | 瑞声光电科技(常州)有限公司 | Sound production device |
-
2020
- 2020-09-11 CN CN202021973998.0U patent/CN212324356U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073882A (en) * | 2020-09-11 | 2020-12-11 | 常州市润蒙声学科技有限公司 | Dual-drive loudspeaker capable of producing sound on two sides |
| CN113068105A (en) * | 2021-05-07 | 2021-07-02 | 台湾立讯精密有限公司 | Double-sided loudspeaker device |
| US11528559B2 (en) | 2021-05-07 | 2022-12-13 | Luxshare-Ict Co., Ltd. | Double sided speaker device |
| WO2024045236A1 (en) * | 2022-08-30 | 2024-03-07 | 瑞声光电科技(常州)有限公司 | Sound production device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212324356U (en) | Dual-drive loudspeaker capable of producing sound on two sides | |
| CN109936803B (en) | Speaker, speaker assembly and portable electronic device | |
| CN114554368B (en) | Sound producing device and electronic equipment | |
| CN111182426A (en) | Bone conduction speaker and compound speaker | |
| WO2020135288A1 (en) | Screen vibration sound production apparatus and electronic product | |
| WO2020181893A1 (en) | Sound generation device and electronic product | |
| US10237661B2 (en) | Speaker device | |
| CN216391402U (en) | Loudspeaker | |
| CN210840043U (en) | Vibration sound production device and electronic product | |
| CN104822112A (en) | Speaker device | |
| US20230283956A1 (en) | Speaker | |
| US20230148010A1 (en) | Speaker and electronic device | |
| CN112073882A (en) | Dual-drive loudspeaker capable of producing sound on two sides | |
| CN211406274U (en) | Bone conduction speaker and compound speaker | |
| CN114866921B (en) | Sound producing device and audio equipment | |
| WO2023115826A1 (en) | Sound production device and electronic device | |
| CN204616080U (en) | Speaker unit | |
| KR20100044461A (en) | Directivity type speaker | |
| CN204616078U (en) | Speaker unit | |
| CN102946581B (en) | Loudspeaker device | |
| WO2022067986A1 (en) | Sound generation device | |
| US20240284117A1 (en) | Speaker | |
| CN204707270U (en) | Loud speaker | |
| CN218450528U (en) | Loudspeaker of magnet and magnetic conductive sheet combination vibration | |
| CN216673285U (en) | Internal welding type earphone speaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |