CN219981023U - Double-sided sound production device and sound production equipment - Google Patents
Double-sided sound production device and sound production equipment Download PDFInfo
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- CN219981023U CN219981023U CN202321009713.5U CN202321009713U CN219981023U CN 219981023 U CN219981023 U CN 219981023U CN 202321009713 U CN202321009713 U CN 202321009713U CN 219981023 U CN219981023 U CN 219981023U
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- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 250
- 239000010959 steel Substances 0.000 claims abstract description 250
- 230000005291 magnetic effect Effects 0.000 claims abstract description 228
- 230000009977 dual effect Effects 0.000 claims description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a double-sided sound emitting device and sound emitting equipment, wherein a first sound emitting component and a second sound emitting component are respectively arranged on two sides of central magnetic steel, so that the first sound emitting component and the second sound emitting component share one group of central magnetic steel, at least two groups of support magnetic steels symmetrical to the central magnetic steel are arranged at the edge parts of the central magnetic steel, two ends of the support magnetic steel are respectively connected with the central magnetic steel and the sound emitting components, the support magnetic steel is utilized to play a supporting role and a magnetic reinforcing role on the central magnetic steel, and meanwhile, the support magnetic steel comprises at least one concave part, and a gap and a concave part formed by the support magnetic steel can provide vibration space for the first sound emitting component and the second sound emitting component, so that the vibration space required by the first sound emitting component and the second sound emitting component is not required to be increased, the whole height of the sound emitting device is reduced, and the sound emitting effect of the double-sided sound emitting device is enhanced.
Description
Technical Field
The utility model relates to the technical field of sound emitting devices, in particular to a double-sided sound emitting device and sound emitting equipment.
Background
In the prior art, acoustic devices with double-sided sound production are generally formed by combining two groups of sound production devices. The two groups of sound production devices are independently arranged and are respectively provided with upper magnetic steel and lower magnetic steel, and the upper magnetic steel and the lower magnetic steel are supported and isolated by the magnetic components such as the magnetic cover, so that the volume of the acoustic device with double-sided sound production is larger than that of the acoustic device with single-sided sound production. With the miniaturization development of the sound emitting device, the double-sided sound emitting device is difficult to be applied to light and thin equipment due to the limitation of the large size of the double-sided sound emitting device. If the mode of reducing the height of the magnetic steel is adopted to adapt to the light and thin equipment, the performance of the double-sided sound emitting device is reduced, and the advantages of the double-sided sound emitting device are lost.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the utility model provides a two-sided sound production device and sound production equipment, when reducing the height of two-sided sound production device, strengthen the sound production effect of two-sided sound production device.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a double-sided sound production device comprises a first sound production assembly, a second sound production assembly and a central magnetic steel; the first sound generating component and the second sound generating component are respectively arranged on two sides of the central magnetic steel; at least two supporting magnetic steels which are symmetrical with respect to the central magnetic steel are arranged at the edge part of the central magnetic steel; the support magnetic steel comprises at least one concave part, one end of the support magnetic steel with the concave part is connected with the central magnetic steel, and the other end of the support magnetic steel is connected with the first sounding component and/or the second sounding component; the second sound generating component or the first sound generating component is arranged in the concave part.
Further, the method also comprises a first central washer and a second central washer; the first center washer is arranged between the first sound generating assembly and the center magnetic steel and is connected with the center magnetic steel; the second center washer is arranged between the second sounding component and the center magnetic steel and is connected with the center magnetic steel; one end of the supporting magnetic steel, which is provided with the concave part, is connected with the first central washer or the second central washer, and the other end of the supporting magnetic steel is connected with the first sounding component and/or the second sounding component.
Further, the device also comprises at least one group of edge magnetic steel; the side magnetic steel component is arranged on the periphery of the central magnetic steel and is connected with the first sounding component or/and the second sounding component.
Further, the central magnetic steel is rectangular-like; the support magnetic steel is arranged on the short side part and/or the short side part of the central magnetic steel.
Further, the supporting magnetic steel is arranged on the short side part of the central magnetic steel; the side magnetic steel is arranged on the long side part of the central magnetic steel.
Further, the supporting magnetic steel is arranged at the long side part of the central magnetic steel; the side magnetic steel is arranged on the short side part of the center magnetic steel.
Further, the supporting magnetic steel is arranged on the long side part and the short side part of the central magnetic steel; the side magnetic steel is arranged on one side, away from the center magnetic steel, of the supporting magnetic steel.
Further, the first sound generating assembly and the second sound generating assembly comprise a basin frame, a voice coil and a vibrating diaphragm; the basin frame of the first sounding component and the basin frame of the second sounding component form a containing frame; the vibrating diaphragm is arranged on the outer side of the accommodating frame; the voice coil is arranged between the basin frame and the central magnetic steel.
Further, the voice coil of the first sounding assembly and the voice coil of the first sounding assembly have different sizes; the voice coil of the second sounding component is arranged in the concave part; the voice coil of the second sounding component is arranged in the gap.
In order to solve the technical problems, the utility model adopts another technical scheme that:
a sound generating device comprises the double-sided sound generating device.
The utility model has the beneficial effects that: through setting up first sound generating component and second sound generating component in the both sides of center magnet steel respectively for first sound generating component and second sound generating component share a set of center magnet steel, and set up at least two sets of support magnet steel about center magnet steel symmetry in the limit portion of center magnet steel, and be connected with center magnet steel and sound generating component respectively with the both ends of support magnet steel, play supporting role and magnetism reinforcing effect to center magnet steel with the support magnet steel, support the magnet steel simultaneously and include at least one depressed part, the clearance and the depressed part that form can provide vibration space for first sound generating component and second sound generating component, thereby do not need to increase the high vibration space that satisfies first sound generating component and second sound generating component of sound generating component, the sound generating effect of reinforcing two-sided sound generating component when having reduced the overall height of sound generating component.
Drawings
FIG. 1 is a schematic diagram of a dual-sided sound emitting device according to an embodiment of the present utility model;
FIG. 2 is a top view of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a first structure A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a first structure B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 5 is a cross-sectional view of a second structure A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 6 is a cross-sectional view of a second structure B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 7 is a cross-sectional view of a third configuration A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 8 is a cross-sectional view of a third configuration B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 9 is a cross-sectional view of a fourth configuration A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 10 is a schematic diagram of a dual-sided sound emitting device according to an embodiment of the present utility model;
FIG. 11 is a cross-sectional view of a fifth configuration A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 12 is a cross-sectional view of a fifth construction B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 13 is a cross-sectional view of a sixth configuration A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 14 is a cross-sectional view of a sixth structure B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 15 is a cross-sectional view of a seventh configuration A-A of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
FIG. 16 is a cross-sectional view of a seventh configuration B-B of a dual sided sound emitting device in accordance with an embodiment of the present utility model;
description of the reference numerals:
1. a first sounding component; 2. a second sound emitting assembly; 3. a center magnetic steel; 4. a first central washer; 5. a second central washer; 6. edge magnetic steel; 7. a basin stand; 8. a voice coil; 9. a vibrating diaphragm; 10. supporting the magnetic steel; 101. a concave portion.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, a double-sided sound emitting device includes a first sound emitting component, a second sound emitting component, and a central magnetic steel; the first sound generating component and the second sound generating component are respectively arranged on two sides of the central magnetic steel; at least two supporting magnetic steels which are symmetrical with respect to the central magnetic steel are arranged at the edge part of the central magnetic steel; the support magnetic steel comprises at least one concave part, one end of the support magnetic steel with the concave part is connected with the central magnetic steel, and the other end of the support magnetic steel is connected with the first sounding component and/or the second sounding component; the second sound generating component or the first sound generating component is arranged in the concave part.
From the above description, the beneficial effects of the utility model are as follows: through setting up first sound generating component and second sound generating component in the both sides of center magnet steel respectively for first sound generating component and second sound generating component share a set of center magnet steel, and set up at least two sets of support magnet steel about center magnet steel symmetry in the limit portion of center magnet steel, and be connected with center magnet steel and sound generating component respectively with the both ends of support magnet steel, play supporting role and magnetism reinforcing effect to center magnet steel with the support magnet steel, support the magnet steel simultaneously and include at least one depressed part, the clearance and the depressed part that form can provide vibration space for first sound generating component and second sound generating component, thereby do not need to increase the high vibration space that satisfies first sound generating component and second sound generating component of sound generating component, the sound generating effect of reinforcing two-sided sound generating component when having reduced the overall height of sound generating component.
Further, the method also comprises a first central washer and a second central washer; the first center washer is arranged between the first sound generating assembly and the center magnetic steel and is connected with the center magnetic steel; the second center washer is arranged between the second sounding component and the center magnetic steel and is connected with the center magnetic steel; one end of the supporting magnetic steel, which is provided with the concave part, is connected with the first central washer or the second central washer, and the other end of the supporting magnetic steel is connected with the first sounding component and/or the second sounding component.
As can be seen from the above description, the first central washer and the second central washer are disposed on two sides of the central magnetic steel, and the first central washer and the second central washer perform a magnetic conduction function, and form a magnetic circuit with the central magnetic steel and the supporting magnetic steel, so as to provide a uniform magnetic field for the first sounding component and the second sounding component, thereby improving the sensitivity of the sounding device and reducing distortion.
Further, the device also comprises at least one group of edge magnetic steel; the side magnetic steel component is arranged on the periphery of the central magnetic steel and is connected with the first sounding component or/and the second sounding component.
From the above description, the side magnetic steel is arranged on the periphery of the center magnetic steel, so that the magnetic effect of the sounding device is enhanced, and the sounding effect of the sounding device is improved.
Further, the central magnetic steel is rectangular-like; the support magnetic steel is arranged on the short side part and/or the short side part of the central magnetic steel.
From the above description, the center magnetic steel is set to be rectangular-like, and the support magnetic steel can be arranged on the short side part and/or the short side part of the center magnetic steel, so that the support magnetic steel can be arranged in different modes according to different application scenes, and different support effects and magnetic field effects are achieved.
Further, the supporting magnetic steel is arranged on the short side part of the central magnetic steel; the side magnetic steel is arranged on the long side part of the central magnetic steel.
From the above description, it can be seen that the volume of the edge magnetic steel can be increased by setting the support magnetic steel on the short side portion of the center magnetic steel and setting the edge magnetic steel on the long side portion of the center magnetic steel, that is, the larger space of the long side portion is used for setting the edge magnetic steel, and the small space of the short side portion is used for setting the support magnetic steel, thereby improving the sounding effect of the sounding device.
Further, the supporting magnetic steel is arranged at the long side part of the central magnetic steel; the side magnetic steel is arranged on the short side part of the center magnetic steel.
It can be seen from the above description that the support magnet steel is disposed at the long side portion of the central magnet steel, and the side magnet steel is disposed at the short side portion of the central magnet steel, that is, the larger space of the long side portion is used for disposing the support magnet steel, and the small space of the short side portion is used for disposing the side magnet steel, so that the connection surface between the support magnet steel and the central magnet steel and the sound production assembly is increased, and the overall stability of the sound production device is improved.
Further, the supporting magnetic steel is arranged on the long side part and the short side part of the central magnetic steel; the side magnetic steel is arranged on one side, away from the center magnetic steel, of the supporting magnetic steel.
From the above description, when the supporting magnetic steel is disposed at the long side portion and the short side portion of the central magnetic steel, the space outside the supporting magnetic steel is fully utilized for disposing the side magnetic steel, so that the overall stability of the sounding device is improved, and the sounding effect of the sounding device is also improved.
Further, the first sound generating assembly and the second sound generating assembly comprise a basin frame, a voice coil and a vibrating diaphragm; the basin frame of the first sounding component and the basin frame of the second sounding component form a containing frame; the vibrating diaphragm is arranged on the outer side of the accommodating frame; the voice coil is arranged between the basin frame and the central magnetic steel.
It can be seen from the above description that the frame, the voice coil, and the diaphragm are respectively provided for the first sounding component and the second sounding component, and the frame of the first sounding component and the frame of the second sounding component form a containing frame, so as to realize double-sided sounding while supporting the whole sounding device.
Further, the voice coil of the first sounding assembly and the voice coil of the first sounding assembly have different sizes; the voice coil of the second sounding component is arranged in the concave part; the voice coil of the second sounding component is arranged in the gap.
Through setting the voice coil loudspeaker voice coil of first sound subassembly and the voice coil loudspeaker voice coil of first sound subassembly to different sizes for the vibration space of first sound subassembly voice coil loudspeaker voice coil and the vibration space of second sound subassembly voice coil loudspeaker voice coil are not in same direction, do not need to set up the vibration height stack of first sound subassembly voice coil loudspeaker voice coil and the vibration height stack of second sound subassembly voice coil loudspeaker voice coil promptly, but set up the vibration height of first sound subassembly voice coil loudspeaker voice coil and the vibration height cross of second sound subassembly voice coil loudspeaker voice coil, have further reduced the height of sound production device.
Another embodiment of the present utility model provides a sound emitting device, including a double-sided sound emitting device as described above.
The above-mentioned two-sided sound generating device of this embodiment can be applicable to in frivolous electronic equipment, such as in equipment such as cell-phone, panel computer, intelligent wrist-watch, the following explanation through concrete implementation:
example 1
Referring to fig. 1, a double-sided sound emitting device includes a first sound emitting component 1, a second sound emitting component 2, a central magnetic steel 3, a first central washer 4, a second central washer 5, and at least one set of edge magnetic steel 6; the first sounding component 1 and the second sounding component 2 are respectively arranged on two sides of the central magnetic steel 3; at least two support magnetic steels 10 symmetrical to the central magnetic steel 3 are arranged at the edge of the central magnetic steel 3; the supporting magnetic steel 10 comprises at least one concave part 101, one end of the supporting magnetic steel 10 is connected with the central magnetic steel 3, and the other end of the supporting magnetic steel is connected with the first sounding component 1 and/or the second sounding component 2; the second sound generating component 2 or the first sound generating component 1 is arranged in the concave part 101; the first center washer 4 is arranged between the first sound generating assembly 1 and the center magnetic steel 3 and is connected with the center magnetic steel 3; the second center washer 5 is arranged between the second sounding component 2 and the center magnetic steel 3 and is connected with the center magnetic steel 3; the components can be connected by bonding or welding; when the magnetic steel support is applied to a horn-shaped sound generating device, the whole structure of the sound generating device is circular, and the support magnetic steel 10 is arranged at the edge of the central magnetic steel 3; wherein, the central magnetic steel 3, the supporting magnetic steel 10 and the side magnetic steel 6 are also provided with protruding parts which can be arranged according to the residual space in the sounding device;
wherein, the first sound generating component 1 and the second sound generating component 2 each comprise a basin frame 7, a voice coil 8 and a vibrating diaphragm 9; the basin stand 7 of the first sounding component 1 and the basin stand 7 of the second sounding component 2 form a containing stand; the vibrating diaphragm 9 is arranged on the outer side of the accommodating frame; the voice coil 8 is arranged between the basin frame 7 and the central magnetic steel 3; the central magnetic steel 3 is rectangular;
referring to fig. 1 to 4, in an alternative embodiment, the supporting magnetic steel 10 is disposed at a short side portion of the central magnetic steel 3, i.e. along a length direction, and is connected to the basin frame 7 of the second sounding assembly 2; and the supporting magnetic steel 10 is provided with a group of concave parts 101; wherein, the center magnetic steel 3 and the supporting magnetic steel 10 are integrally formed; the side magnetic steel 6 is arranged on the long side part and the short side part of the central magnetic steel 3, and the side magnetic steel 6 is arranged between the first sounding component 1 and the second sounding component 2 and is connected with the basin frame 7; the concave part 101 is formed at the joint of the supporting magnetic steel 10 and the central magnetic steel 3, and the supporting magnetic steel 10 is connected with the basin frame 7 of the first sounding component 1, so that a gap is formed between the supporting magnetic steel 10 and the side magnetic steel 6; the voice coil 8 of the first acoustic assembly 1 is of a different size than the voice coil 8 of the first acoustic assembly 1; the voice coil 8 of the second sounding component 2 is arranged in the concave part 101 of the end, close to the center magnetic steel 3, of the supporting magnetic steel 10, and the voice coil 8 of the first sounding component 1 is arranged in a gap of the end, far away from the center magnetic steel 3, of the supporting magnetic steel 10.
Referring to fig. 5 to 6, in another alternative embodiment, the supporting magnetic steel 10 is disposed at a long side portion of the central magnetic steel 3, i.e. along a width direction, and is connected to the basin frame 7 of the second sounding assembly 2; the side magnetic steel 6 is provided on the long side portion and the short side portion of the center magnetic steel 3.
Referring to fig. 7 to 8, in another alternative embodiment, the supporting magnetic steel 10 is disposed at a long side portion and a short side portion of the central magnetic steel 3, that is, disposed in both the length direction and the width direction, and is connected to the basin stand 7 of the second sounding assembly 2; the arrangement mode of the edge magnetic steel 6 is not changed.
Referring to fig. 9, in another alternative embodiment, the central magnetic steel 3 and the supporting magnetic steel 10 are separately disposed; one end of the supporting magnetic steel 10, which is provided with a concave part 101, is connected with the side magnetic steel 6 arranged on the short side, and the other end of the supporting magnetic steel is connected with the first central washer 4 to form a gap; optionally, the end of the support magnetic steel 10 with the concave portion 101 may be connected to the side magnetic steel 6 disposed on the long side, or be connected to the side magnetic steel 6 disposed on the long side and the short side at the same time; so that the voice coil 8 of the second sounding component 2 is disposed in the gap between the support magnetic steel 10 and one end of the central magnetic steel 3, and the voice coil 8 of the first sounding component 1 is disposed in the recess 101 of one end of the support magnetic steel 10 away from the central magnetic steel 3.
Referring to fig. 10-12, in another alternative embodiment, the supporting magnetic steel 10 is disposed at a short side portion of the central magnetic steel 3; and the supporting magnetic steel 10 is provided with two groups of concave parts 101; the side magnetic steel 6 is arranged at the long side part of the center magnetic steel 3; one end of the support magnetic steel 10 is connected with the side magnetic steel 6 arranged on the short side to form a first concave part 101, and the other end of the support magnetic steel 10 is connected with the center magnetic steel 3 to form a second concave part 101, namely the center magnetic steel 3, the support magnetic steel 10 and the short side magnetic steel 6 are integrally formed; the voice coil 8 of the second sound generating assembly 2 is disposed in the second recess 101 near the supporting magnetic steel 10, and the voice coil 8 of the first sound generating assembly 1 is disposed in the first recess 101.
Referring to fig. 13-14, in another alternative embodiment, the supporting magnetic steel 10 is disposed at a long side portion of the central magnetic steel 3, that is, the central magnetic steel 3, the supporting magnetic steel 10 and the long side magnetic steel 6 are integrally formed.
Referring to fig. 15-16, in another alternative embodiment, the supporting magnetic steel 10 is disposed at a long side portion and a short side portion of the central magnetic steel 3, that is, the central magnetic steel 3, the supporting magnetic steel 10 and the side magnetic steel 6 are integrally formed.
Example two
A sound emitting device comprising a double sided sound emitting device as described in embodiment one.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (10)
1. The double-sided sound production device is characterized by comprising a first sound production assembly, a second sound production assembly and a central magnetic steel;
the first sound generating component and the second sound generating component are respectively arranged on two sides of the central magnetic steel;
at least two supporting magnetic steels which are symmetrical with respect to the central magnetic steel are arranged at the edge part of the central magnetic steel;
the supporting magnetic steel comprises at least one concave part, one end of the supporting magnetic steel is connected with the central magnetic steel, and the other end of the supporting magnetic steel is connected with the first sounding component and/or the second sounding component; the second sound generating component or the first sound generating component is arranged in the concave part.
2. The dual sided sound emitting device of claim 1, further comprising a first central washer and a second central washer;
the first center washer is arranged between the first sound generating assembly and the center magnetic steel and is connected with the center magnetic steel;
the second center washer is arranged between the second sounding component and the center magnetic steel and is connected with the center magnetic steel;
one end of the supporting magnetic steel is connected with the first central washer or the second central washer, and the other end of the supporting magnetic steel is connected with the first sounding component and/or the second sounding component.
3. A two-sided sound emitting device according to claim 1 or 2, further comprising at least one set of edge magnets;
the side magnetic steel component is arranged on the periphery of the central magnetic steel and is connected with the first sounding component or/and the second sounding component.
4. A two-sided sound emitting device according to claim 3 wherein the central magnet steel is rectangular-like;
the support magnetic steel is arranged on the short side part and/or the short side part of the central magnetic steel.
5. The double-sided sound generating device according to claim 4, wherein the supporting magnetic steel is provided at a short side portion of the center magnetic steel;
the side magnetic steel is arranged on the long side part of the central magnetic steel.
6. The double-sided sound generating device of claim 4, wherein the support magnet is disposed on a long side of the center magnet;
the side magnetic steel is arranged on the short side part of the center magnetic steel.
7. The double-sided sound generating device according to claim 4, wherein the support magnetic steel is provided at a long side portion and a short side portion of the center magnetic steel;
the side magnetic steel is arranged on one side, away from the center magnetic steel, of the supporting magnetic steel.
8. The dual sided sound emitting device of claim 1, wherein the first sound emitting assembly and the second sound emitting assembly each comprise a frame, a voice coil, and a diaphragm;
the basin frame of the first sounding component and the basin frame of the second sounding component form a containing frame;
the vibrating diaphragm is arranged on the outer side of the accommodating frame;
the voice coil is arranged between the basin frame and the central magnetic steel.
9. The dual sided sound emitting device of claim 8, wherein the voice coil of the first sound emitting assembly is of a different size than the voice coil of the first sound emitting assembly.
10. A sound emitting device comprising a double sided sound emitting device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321009713.5U CN219981023U (en) | 2023-04-28 | 2023-04-28 | Double-sided sound production device and sound production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321009713.5U CN219981023U (en) | 2023-04-28 | 2023-04-28 | Double-sided sound production device and sound production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219981023U true CN219981023U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321009713.5U Active CN219981023U (en) | 2023-04-28 | 2023-04-28 | Double-sided sound production device and sound production equipment |
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| Country | Link |
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| CN (1) | CN219981023U (en) |
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- 2023-04-28 CN CN202321009713.5U patent/CN219981023U/en active Active
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