CN211531297U - Sound production device - Google Patents
Sound production device Download PDFInfo
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- CN211531297U CN211531297U CN201922485678.4U CN201922485678U CN211531297U CN 211531297 U CN211531297 U CN 211531297U CN 201922485678 U CN201922485678 U CN 201922485678U CN 211531297 U CN211531297 U CN 211531297U
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
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Abstract
The utility model provides a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibration diaphragm, a voice coil and a framework, and the vibration diaphragm comprises a vibration part, a first flange part and a second flange part; the first ring folding part comprises a first fixed part attached to the vibration part, a first ring folding part main body bent and extended from the first fixed part and a second fixed part extended from the first ring folding part main body, and the second fixed part is fixed on the basin frame; the second flange part comprises a third fixing part attached to the vibration part, a second flange part main body bent and extended by the third fixing part and a fourth fixing part extended by the second flange part main body, and the fourth fixing part is fixed at the top end of the magnetic circuit system; the framework is arc-shaped along the cross section of the vibration direction, one end of the framework is fixed on the vibration part, and the other end of the framework obliquely extends into the magnetic gap from the vibration part to the magnetic circuit system and is fixedly connected with the voice coil. Compared with the prior art, the high-frequency band of the sound production device is wider.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to an electroacoustic conversion field especially relates to an apply to vocal device of electron audio amplifier product.
[ background of the invention ]
The sound generating device is also called a loudspeaker or a loudspeaker, and is applied to a sound box to convert an audio signal into sound for playing.
The sound production device of the related art comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is fixed on the basin frame respectively, the vibration system comprises a voice coil and a vibrating diaphragm, the voice coil is inserted into the magnetic gap, the vibrating diaphragm is fixed on the basin frame, and the voice coil vibrates under a magnetic field to drive the vibrating diaphragm to vibrate and produce sound.
However, in the sound-generating device of the related art, the strength of the diaphragm of the sound-generating device is not sufficient, the frequency band of the sound-generating device is narrow, and the sound-generating effect is not good.
Therefore, there is a need to provide a new sound generation device to solve the above technical problems.
[ Utility model ] content
An object of the utility model is to provide a sound production device that extension sound production device high frequency and sound production effect are good.
In order to achieve the above object, the present invention provides a sound production device, which comprises a frame, a vibration system and a magnetic circuit system with a magnetic gap, wherein the vibration system and the magnetic circuit system are respectively fixed on the frame, the magnetic circuit system drives the vibration system to vibrate and produce sound, the vibration system comprises a vibrating diaphragm fixed on the frame, a voice coil inserted into the magnetic gap to drive the vibrating diaphragm to vibrate, and a framework connecting the vibrating diaphragm and the voice coil,
the vibrating diaphragm comprises an annular vibrating part arranged around the magnetic circuit system, an annular first flange part arranged at one end, far away from the magnetic circuit system, of the vibrating part and an annular second flange part arranged at one end, near to the magnetic circuit system, of the vibrating part, the first flange part surrounds the second flange part and is spaced from the second flange part, and the vibrating part is located between the first flange part and the second flange part;
the first ring folding part comprises a first fixing part which is attached to the vibration part and is annular, a first ring folding part main body which is bent and extends from the first fixing part to the direction far away from the magnetic circuit system and is annular, and a second fixing part which is bent and extends from one end of the first ring folding part main body far away from the first fixing part to the direction far away from the magnetic circuit system and is annular, wherein the second fixing part is fixed on the basin stand;
the second flange part comprises a third fixing part which is attached to the vibration part and is annular, a second flange part main body which is bent and extends from the third fixing part to the direction close to the magnetic circuit system and is annular, and a fourth fixing part which is bent and extends from the section of the second flange part main body far away from the third fixing part to the magnetic circuit system and is annular, wherein the fourth fixing part is fixed at one end of the magnetic circuit system far away from the basin stand;
the framework is arc-shaped along the cross section of the vibration direction of the vibration system, one end of the framework is fixed on the vibration part, and the other end of the framework obliquely extends into the magnetic gap from the vibration part to the magnetic circuit system and is fixedly connected with the voice coil.
Preferably, the cross section of the vibration part along the vibration direction of the vibration system is arc-shaped, the height of the magnetic circuit system along the vibration direction of the vibrating diaphragm is higher than the height of the basin frame along the vibration direction of the vibrating diaphragm, and the vibration part extends from the second flange part to the first flange part in an inclined manner.
Preferably, the second flange portion main body is formed by the diaphragm being recessed away from the magnetic circuit system in a vibration direction of the vibration system.
Preferably, the magnetic circuit system comprises a magnetic bowl fixed on the basin frame and a magnetic steel unit accommodated and fixed in the magnetic bowl, and the magnetic steel unit and the magnetic bowl are arranged at intervals to form the magnetic gap.
Preferably, the magnetic bowl comprises a first magnetic bowl and a second magnetic bowl which is arranged opposite to the first magnetic bowl, and the first magnetic bowl comprises a first magnetic bowl bottom wall which is supported and fixed on the basin frame and a first magnetic bowl side wall which is bent and extended from the first magnetic bowl bottom wall to the direction close to the vibrating diaphragm; the second magnetic bowl comprises a second magnetic bowl bottom wall which is arranged opposite to the first magnetic bowl bottom wall at an interval, and a second magnetic bowl side wall which is bent and extended from the second magnetic bowl bottom wall to the direction close to the first magnetic bowl bottom wall and is abutted against the first magnetic bowl side wall, and the magnetic steel unit is arranged at an interval with the first magnetic bowl side wall and the second magnetic bowl side wall to form the magnetic gap; the side wall of the first magnetic bowl and/or the side wall of the second magnetic bowl are/is provided with a abdicating groove which penetrates through the side wall of the first magnetic bowl, and the framework extends into the magnetic gap through the abdicating groove; the fourth fixing part is fixed on one side, far away from the magnetic steel unit, of the bottom wall of the second magnetic bowl.
Preferably, the bobbin comprises a bobbin body arranged around the magnetic circuit system and an extension wall extending from the inner periphery of the bobbin body close to the magnetic circuit system to the inside of the magnetic gap; the skeleton body is followed the cross section of vibration system's vibration direction is personally submitted the arc structure, extend the wall warp the groove of stepping down extends to in the magnetic gap and with the voice coil loudspeaker voice coil is connected.
Preferably, the bobbin further comprises a connecting wall located in the magnetic gap and having an annular shape, and the extending wall is connected to the connecting wall and connected to the voice coil through the connecting wall.
Preferably, the connection wall is attached to one end of the voice coil close to the diaphragm.
Preferably, the basin frame includes the diapire, by the diapire is kept away from the outer wall that magnetic circuit's periphery was buckled and is extended and by the diapire is close to magnetic circuit's periphery is buckled and is extended inner wall, the outer wall encircles the inner wall sets up and separates each other, the second fixed part is fixed in the outer wall, first magnetism bowl supports and is fixed in the inner wall, the partial embedding of inner wall first magnetism bowl.
Preferably, the sound production device further comprises a front cover covering one end of the magnetic circuit system far away from the basin frame, and the fourth fixing portion is clamped between the magnetic circuit system and the front cover.
Preferably, the vibration system further comprises an elastic element fixed on the basin frame, the elastic element is sleeved outside the magnetic circuit system and comprises a fixed arm fixed on the basin frame and an elastic arm extending from the fixed arm to the magnetic circuit system and surrounding the magnetic circuit system.
Compared with the prior art, the utility model discloses an among the sounder, skeleton one end is fixed in vibration portion, the other end by vibration portion to magnetic circuit slope extends to in the magnetic gap, and with voice coil loudspeaker voice coil fixed connection, the skeleton is followed the arc structure is personally submitted to vibration system's vibration direction's transversal, has increased skeleton and whole vibration system's intensity, has expanded the high frequency band of whole sounder, and sound producing effect is better.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and 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 without inventive work, wherein:
fig. 1 is a schematic perspective view of the sound device of the present invention;
fig. 2 is an exploded view of a part of the three-dimensional structure of the sound device of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
fig. 4 is a schematic view of the three-dimensional structure of the skeleton of the sound generating device of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a sound generating device 100, which includes a frame 1, a vibration system 2 fixed on the frame 1, a magnetic circuit system 3 with a magnetic gap 30, and a front cover 4, wherein the magnetic circuit system 3 drives the vibration system 2 to vibrate and generate sound.
In this embodiment, the frame 1 includes a bottom wall 11, an outer wall 12 extending from the bottom wall 11 away from the periphery of the magnetic circuit system 3, and an inner wall 13 extending from the bottom wall 11 close to the periphery of the magnetic circuit system 3, the outer wall 12 is disposed around the inner wall 13 and spaced from each other, and the inner wall 13 is provided with a protrusion 131 protruding toward the magnetic circuit system 3.
The vibration system 2 comprises a vibrating diaphragm 21 fixed on the frame 1, a voice coil 22 inserted into the magnetic gap 30 to drive the vibrating diaphragm 21 to vibrate, a framework 23 connecting the vibrating diaphragm 21 and the voice coil 22, and an elastic part 24 fixed on the frame 1.
The diaphragm 21 includes around the annular vibration portion 211 that is that magnetic circuit 3 sets up, set up in vibration portion 211 keeps away from magnetic circuit 3 one end be annular first collar portion 212 and set up in vibration portion 211 is close to magnetic circuit 3 one end be annular second collar portion 213, first collar portion 212 encircles second collar portion 213 and mutual interval, vibration portion 211 is located first collar portion 212 with between the second collar portion 213.
The first hinge part 212 comprises a first fixing part 2121 attached to the vibrating part 211 and shaped like a ring, a first hinge part main body 2122 bent and extended in a direction away from the magnetic circuit system 3 by the first fixing part 2121 and shaped like a ring, and a second fixing part 2123 extended and shaped like a ring by the first fixing part 2121 and away from the magnetic circuit system 3 by an end of the first hinge part main body 2122, wherein the second fixing part 2123 is fixed to the basin stand 1.
The second flange portion 213 includes a third fixing portion 2131 which is attached to the vibrating portion 211 and has a ring shape, a second flange portion main body 2132 which is bent and extended from the third fixing portion 2131 to be close to the magnetic circuit system 3 and has a ring shape, and a fourth fixing portion 2133 which is extended from one end of the second flange portion main body 2132 which is far from the third fixing portion 2131 to be close to the magnetic circuit system 3 and has a ring shape, and the fourth fixing portion 2133 is fixed to one end of the magnetic circuit system 3 which is far from the frame 1.
The cross section of the bobbin 23 along the vibration direction of the vibration system 2 is arc-shaped, and one end of the bobbin is fixed to the vibration portion 211, and the other end of the bobbin extends from the vibration portion 211 to the magnetic circuit system 3 in an inclined manner into the magnetic gap 30 and is fixedly connected to the voice coil 22.
The cross section of the framework 23 along the vibration direction of the vibration system 2 is an arc-shaped structure, one end of the framework is fixed to the vibration part 211, and the other end of the framework extends from the vibration part 211 to the magnetic circuit system 3 in an inclined manner to the magnetic gap 30. This configuration enhances the strength of the vibration system 3 and extends the high frequency of the sound producing device 100. The diaphragm 21 is a double-folded ring structure, and the second folded ring portion main body 2132 is formed by the diaphragm 21 being recessed in a direction away from the magnetic circuit system 3 along the vibration direction of the vibration system 2. The structural arrangement of the second flange part main body 2132 avoids interference with the framework 23 in the vibration process, and the reliability of the diaphragm 21 is improved.
Specifically, the bobbin 23 includes a bobbin body 231 disposed around the magnetic circuit system, an extension wall 232 extending from the inner periphery of the bobbin body 231 close to the magnetic circuit system 3 into the magnetic gap 30, and a connection wall 233 located in the magnetic gap 30 and having an annular shape, and a cross section of the bobbin body 231 along the vibration direction of the vibration system 2 has an arc-shaped structure. The connection wall 233 is located in the magnetic gap 30 and connected to the voice coil 22, the extension wall 232 is connected to the connection wall 233 and connected to the voice coil 22 through the connection wall 233, and specifically, the connection wall 233 is attached to one end of the voice coil 22 close to the diaphragm 21.
Specifically, the cross section of the vibration portion 211 along the vibration direction of the vibration system 2 is arc-shaped, the height of the magnetic circuit system 3 along the vibration direction of the vibration diaphragm 21 is higher than the height of the basin frame 1 along the vibration direction of the vibration diaphragm 21, and the vibration portion 211 extends obliquely from the second flange portion 213 to the first flange portion 212, that is, the cross section of the vibration portion 211 along the vibration direction of the vibration system 2 is arc-shaped, so that the strength of the vibration system 2 is further enhanced, and the high frequency of the sound-producing device 100 is expanded.
In this embodiment, the elastic element 24 is sleeved outside the magnetic circuit system 3, and includes a fixing arm 241 fixed to the basin stand 1 and an elastic arm 242 extending from the fixing arm 241 to the magnetic circuit system 3 and surrounding the magnetic circuit system 3, and specifically, the fixing arm 241 is fixed to the outer wall 12.
In this embodiment, the magnetic circuit system 3 has a split structure, and the magnetic circuit efficiency is higher. The magnetic bowl structure comprises a magnetic bowl 31 fixed on the basin stand 1 and a magnetic steel unit 32 accommodated and fixed in the magnetic bowl 31, wherein the magnetic steel unit 32 and the magnetic bowl 31 are arranged at intervals to form a magnetic gap 30. The magnetic steel unit 32 comprises a first magnetic steel 311 fixed on the magnetic bowl 31, a pole core 312 of the first magnetic steel 311 and a second magnetic steel 313 stacked on one side of the first magnetic steel 311, wherein the pole core 312 is far away from the first magnetic steel 311.
The magnetic bowl 31 comprises a first magnetic bowl 311 and a second magnetic bowl 312 opposite to the first magnetic bowl 311, wherein the first magnetic bowl 311 comprises a first magnetic bowl bottom wall 3111 fixed on the basin stand 1 in a supporting manner and a first magnetic bowl side wall 3112 bent and extended from the first magnetic bowl bottom wall 3111 to the direction close to the vibrating diaphragm 21; the second magnetic bowl 312 includes a second magnetic bowl bottom wall 3121 opposite to the first magnetic bowl bottom wall 3111 at an interval, and a second magnetic bowl side wall 3122 extending from the second magnetic bowl bottom wall 3121 to being close to the first magnetic bowl bottom wall 3111, and abutting against the first magnetic bowl side wall 3112, the magnetic steel unit 32 is disposed at an interval with the first magnetic bowl side wall 3112 and the second magnetic bowl side wall 3122 to form the magnetic gap 30. The first magnetic bowl side wall 3112 and the second magnetic bowl side wall 3122 are provided with a relief groove 310 penetrating therethrough, and the first magnetic bowl side wall 3112 corresponds the protruding block 131 of the inner wall 13 is provided with a notch 3110, the protruding block 131 is disposed on the notch 3110 so that the inner wall 13 is partially embedded into the first magnetic bowl 311. In this embodiment, the bobbin 23 extends into the magnetic gap 30 through the receding groove 310, and specifically, the extending wall 232 extends into the magnetic gap 30 through the receding groove 310 and is connected to the voice coil 22; the fourth fixing portion 2133 is fixed to a side of the second magnetic bowl bottom wall 3121 away from the magnetic steel unit 32. The front cover 4 covers one end of the magnetic circuit system 3 away from the basin frame 1, specifically, the fourth fixing portion 2133 is sandwiched between the magnetic circuit system 3 and the front cover 4, that is, the fourth fixing portion 2133 is pressed by the front cover 4 to one side of the second magnetic bowl bottom wall 3121 away from the magnetic steel unit 32, so as to perform a sealing function.
The structure enables the edge of the inner side of the vibrating diaphragm 21 to be directly glued on the magnetic bowl 31 of the magnetic circuit system 3, so that the effective vibration area (SD) is increased, and the loudness of the whole sounder 100 is improved.
Compared with the prior art, the utility model discloses an among the sounder, skeleton one end is fixed in vibration portion, the other end by vibration portion to magnetic circuit slope extends to in the magnetic gap, and with voice coil loudspeaker voice coil fixed connection, promptly the skeleton is followed the arc structure is personally submitted to vibration system's vibration direction's transversal, has increased skeleton and whole vibration system's intensity, has expanded the high frequency band of whole sounder, and sound producing effect is better.
The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.
Claims (11)
1. A sound production device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame, the magnetic circuit system is provided with a magnetic gap, the magnetic circuit system drives the vibration system to vibrate and produce sound, the vibration system comprises a vibrating diaphragm fixed on the basin frame, a voice coil inserted into the magnetic gap to drive the vibrating diaphragm to vibrate, and a framework connecting the vibrating diaphragm and the voice coil, and is characterized in that,
the vibrating diaphragm comprises an annular vibrating part arranged around the magnetic circuit system, an annular first flange part arranged at one end, far away from the magnetic circuit system, of the vibrating part and an annular second flange part arranged at one end, near to the magnetic circuit system, of the vibrating part, the first flange part surrounds the second flange part and is spaced from the second flange part, and the vibrating part is located between the first flange part and the second flange part;
the first ring folding part comprises a first fixing part which is attached to the vibration part and is annular, a first ring folding part main body which is bent and extends from the first fixing part to the direction far away from the magnetic circuit system and is annular, and a second fixing part which is bent and extends from one end of the first ring folding part main body far away from the first fixing part to the direction far away from the magnetic circuit system and is annular, wherein the second fixing part is fixed on the basin stand;
the second flange part comprises a third fixing part which is attached to the vibrating part and is annular, a second flange part main body which is bent and extends from the third fixing part to the direction close to the magnetic circuit system and is annular, and a fourth fixing part which extends from one end of the second flange part main body far away from the third fixing part to the magnetic circuit system and is annular, wherein the fourth fixing part is fixed at one end of the magnetic circuit system far away from the basin stand;
the framework is arc-shaped along the cross section of the vibration direction of the vibration system, one end of the framework is fixed on the vibration part, and the other end of the framework obliquely extends into the magnetic gap from the vibration part to the magnetic circuit system and is fixedly connected with the voice coil.
2. The sounding device according to claim 1, wherein the cross section of the vibrating portion along the vibration direction of the vibrating system is arc-shaped, and the height of the magnetic circuit system along the vibration direction of the diaphragm is higher than the height of the frame along the vibration direction of the diaphragm, so that the vibrating portion extends from the second flange portion to the first flange portion in an inclined manner.
3. The sounding device according to claim 1, wherein the second flange portion main body is formed by the diaphragm being recessed away from the magnetic circuit system in a vibration direction of the vibration system.
4. The sounding device according to claim 1, wherein the magnetic circuit system comprises a magnetic bowl fixed on the frame, and a magnetic steel unit accommodated and fixed in the magnetic bowl, and the magnetic steel unit and the magnetic bowl are arranged at a distance and form the magnetic gap.
5. The sounding device according to claim 4, wherein the magnetic bowl comprises a first magnetic bowl and a second magnetic bowl arranged opposite to the first magnetic bowl, and the first magnetic bowl comprises a first magnetic bowl bottom wall supported and fixed on the frame and a first magnetic bowl side wall bent and extended from the first magnetic bowl bottom wall to a direction close to the diaphragm; the second magnetic bowl comprises a second magnetic bowl bottom wall which is arranged opposite to the first magnetic bowl bottom wall at an interval, and a second magnetic bowl side wall which is bent from the second magnetic bowl bottom wall to the direction close to the first magnetic bowl bottom wall, extends and is abutted against the first magnetic bowl side wall, and the magnetic steel unit is arranged at an interval with the first magnetic bowl side wall and the second magnetic bowl side wall to form the magnetic gap; the side wall of the first magnetic bowl and/or the side wall of the second magnetic bowl are/is provided with a abdicating groove which penetrates through the side wall of the first magnetic bowl, and the framework extends into the magnetic gap through the abdicating groove; the fourth fixing part is fixed on one side, far away from the magnetic steel unit, of the bottom wall of the second magnetic bowl.
6. The sounder device according to claim 5, wherein the armature comprises an armature body disposed around the magnetic circuit system and an extending wall extending from the armature body proximate an inner periphery of the magnetic circuit system into the magnetic gap; the skeleton body is followed the cross section of vibration system's vibration direction is personally submitted the arc structure, extend the wall warp the groove of stepping down extends to in the magnetic gap and with the voice coil loudspeaker voice coil is connected.
7. The sounder device according to claim 6, wherein the armature further comprises a connecting wall located within the magnetic gap and having an annular shape, and wherein the extension wall is connected to the connecting wall and to the voice coil via the connecting wall.
8. The sounding device according to claim 7, wherein the connecting wall is attached to an end of the voice coil near the diaphragm.
9. The sounder device according to claim 5, wherein the holder includes a bottom wall, an outer wall extending from the bottom wall in a bent manner away from the periphery of the magnetic circuit system, and an inner wall extending from the bottom wall in a bent manner close to the periphery of the magnetic circuit system, the outer wall is disposed around the inner wall and spaced from each other, the second fixing portion is fixed to the outer wall, the first magnetic bowl is supported and fixed to the inner wall, and the inner wall is partially embedded into the first magnetic bowl.
10. The sounding device according to claim 1, further comprising a front cover covering an end of the magnetic circuit system away from the basin stand, wherein the fourth fixing portion is sandwiched between the magnetic circuit system and the front cover.
11. The sounder device according to claim 1, wherein the vibration system further comprises an elastic member fixed to the frame, the elastic member being fitted to an outer side of the magnetic circuit system, the elastic member comprising a fixed arm fixed to the frame and an elastic arm extending from the fixed arm toward the magnetic circuit system and surrounding the magnetic circuit system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922485678.4U CN211531297U (en) | 2019-12-30 | 2019-12-30 | Sound production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922485678.4U CN211531297U (en) | 2019-12-30 | 2019-12-30 | Sound production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211531297U true CN211531297U (en) | 2020-09-18 |
Family
ID=72448485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922485678.4U Expired - Fee Related CN211531297U (en) | 2019-12-30 | 2019-12-30 | Sound production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211531297U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112261555A (en) * | 2020-09-30 | 2021-01-22 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
| CN112492457A (en) * | 2020-12-25 | 2021-03-12 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker |
| CN112584285A (en) * | 2020-11-30 | 2021-03-30 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
| US20230269538A1 (en) * | 2022-01-25 | 2023-08-24 | Aac Microtech (Changzhou) Co., Ltd. | Coaxial Speaker |
-
2019
- 2019-12-30 CN CN201922485678.4U patent/CN211531297U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112261555A (en) * | 2020-09-30 | 2021-01-22 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
| CN112584285A (en) * | 2020-11-30 | 2021-03-30 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound production device |
| CN112492457A (en) * | 2020-12-25 | 2021-03-12 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker |
| US20230269538A1 (en) * | 2022-01-25 | 2023-08-24 | Aac Microtech (Changzhou) Co., Ltd. | Coaxial Speaker |
| US11930341B2 (en) * | 2022-01-25 | 2024-03-12 | Aac Microtech (Changzhou) Co., Ltd. | Coaxial speaker |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200918 Termination date: 20201230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |