CN221448580U - Diaphragm assembly and loudspeaker - Google Patents
Diaphragm assembly and loudspeaker Download PDFInfo
- Publication number
- CN221448580U CN221448580U CN202323285436.3U CN202323285436U CN221448580U CN 221448580 U CN221448580 U CN 221448580U CN 202323285436 U CN202323285436 U CN 202323285436U CN 221448580 U CN221448580 U CN 221448580U
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- diaphragm
- assembly
- vibrating diaphragm
- acoustic suspension
- transmission structure
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- 239000000725 suspension Substances 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims description 43
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 6
- 239000007779 soft material Substances 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 description 11
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model discloses a diaphragm assembly and a loudspeaker, wherein the diaphragm assembly comprises: a first diaphragm; the first acoustic suspension piece is annular and is annularly arranged on the periphery of the first vibrating diaphragm; the second vibrating diaphragm is annular and is annularly arranged on the periphery of the first acoustic suspension piece; the second acoustic suspension piece is annular and is annularly arranged on the periphery of the second vibrating diaphragm; when the first vibrating diaphragm is driven, the first acoustic suspension piece drives the second vibrating diaphragm to move in the same direction.
Description
Technical Field
The utility model relates to the technical field of low-frequency speakers, in particular to a diaphragm assembly and a speaker.
Background
A speaker is a transducer device that converts an electrical signal into an acoustic signal and is generally composed of a magnetic circuit system, a vibration system, a support auxiliary system, and a sound box. In order to obtain a satisfactory frequency response at low frequencies, a resonant system is usually added to the loudspeaker, which responds differently according to the acoustic reproduction frequency, which resonant system generally comprises a transmission line type, a bass reflex type, a passive loudspeaker, etc., in which passive loudspeaker the passive diaphragm has the following response due to the pressure variations in the enclosure caused by the movement of the active loudspeaker diaphragm: (1) If the acoustic reproduction frequency is different from the resonance frequency of the resonant system (there is no boost in acoustic reproduction frequency): in the closed sound box, the audio signal is positive half wave or negative half wave, and the active vibrating diaphragm and the passive vibrating diaphragm are in out-of-phase movement; (2) If the acoustic reproduction frequency is equal to the resonance frequency of the resonant system (there is an increase in acoustic reproduction frequency): in a closed enclosure, the audio signal, whether it be a positive or negative half wave, is in phase with the active diaphragm and the passive diaphragm due to the amplified acoustic reproduction frequency.
In the prior art, an active vibrating diaphragm and a passive vibrating diaphragm are respectively arranged on a sound box, the active vibrating diaphragm realizes outward or inward movement according to positive and negative half waves of an audio signal of a voice coil, the passive vibrating diaphragm realizes outward or inward movement according to the air pressure of an inner cavity of the sound box, and in order to reduce the resonance frequency of a resonance system, the passive vibrating diaphragm is fixed on the sound box by increasing the weight of the passive vibrating diaphragm and adopting a rigid suspension, so that the resonance frequency of the passive vibrating diaphragm is reduced, but the structure has the following defects: (1) When the acoustic reproduction frequency is different from the resonance frequency of the resonance system, the passive diaphragm is only driven by the air pressure in the sound box, and the reproduction of sound is nonlinear due to the unsynchronized movement of the passive diaphragm and the active diaphragm, so that the sound is not faithful enough, and noise is formed; (2) The acoustic reproduction frequency is equal to the resonance frequency of the resonance system, the passive diaphragm is only driven by the air pressure in the sound box and is limited by the rigid suspension, and the amplitude of the acoustic reproduction frequency is small; (3) The installation space required by the active diaphragm and the passive diaphragm is large; (4) In order to improve the stability of the assembly of the heavy passive diaphragm, a centering component is additionally arranged, so that the cost is increased.
Disclosure of utility model
In order to overcome the drawbacks and disadvantages of the prior art, an object of the present utility model is to provide a diaphragm assembly and a speaker.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a diaphragm assembly, comprising:
a first diaphragm;
the first acoustic suspension piece is annular and is annularly arranged on the periphery of the first vibrating diaphragm;
the second vibrating diaphragm is annular and is annularly arranged on the periphery of the first acoustic suspension piece;
the second acoustic suspension piece is annular and is annularly arranged on the periphery of the second vibrating diaphragm;
When the first vibrating diaphragm is driven, the first acoustic suspension piece drives the second vibrating diaphragm to move in the same direction.
Preferably, the first acoustic suspension and the second acoustic suspension are both made of a soft material.
Preferably, the inner peripheral portion of the first acoustic suspension is fixed to the outer peripheral portion of the first diaphragm in an adhesive manner, and the outer peripheral portion of the first acoustic suspension is fixed to the inner peripheral portion of the second diaphragm in an adhesive manner; and the inner peripheral part of the second acoustic suspension is adhered and fixed with the outer peripheral part of the second vibrating diaphragm.
Preferably, the inner part Zhou Buhuan of the first acoustic suspension is provided with a first adhesive sheet, the outer part Zhou Buhuan is provided with a second adhesive sheet, the inner part Zhou Buhuan of the second acoustic suspension is provided with a third adhesive sheet, and the outer part Zhou Buhuan is provided with a fourth adhesive sheet; the first vibrating diaphragm is fixed with the first bonding sheet through glue, and the second vibrating diaphragm is fixed with the second bonding sheet and the third bonding sheet through glue respectively.
A second object of the present utility model is to provide a speaker.
A loudspeaker comprising at least one of the diaphragm assemblies, further comprising:
the driving assembly comprises a voice coil and a transmission structure, and the voice coil is in transmission connection with the first vibrating diaphragm through the transmission structure;
the hollow shell is provided with an assembly hole for installing the second acoustic suspension, and the driving assembly is arranged in the inner cavity of the hollow shell.
Preferably, the hollow housing comprises:
The front side of the rear box body is provided with an opening;
the front cover is arranged at the front side of the rear box body and can cover the opening; the assembly hole is formed in the front cover.
Preferably, the transmission structure is a rod-shaped body and is arranged along the length direction of the rear box body, and the voice coil realizes different-axis transmission with the first vibrating diaphragm through the transmission structure.
Preferably, the diaphragm assembly is provided with two groups altogether, two assembly holes are formed in the front cover, the driving assembly is located between the two assembly holes, the middle part of the transmission structure is connected with the transmission structure, and two ends of the transmission structure are respectively connected with the two first diaphragms.
Preferably, the transmission structure is a rod-shaped body and is arranged along the thickness direction of the rear box body, and the voice coil and the first vibrating diaphragm realize coaxial transmission through the transmission structure.
Preferably, the device further comprises a perforated basket, wherein the front end of the perforated basket is connected with the assembly hole and provided with a through hole for installing the diaphragm assembly, and the driving assembly is arranged at the rear end of the perforated basket.
The utility model has the beneficial effects that:
(1) When the acoustic reproduction frequency is different from the resonance frequency of the resonance system, the audio signal of the voice coil is positive half wave: the first vibrating diaphragm moves outwards and gives a first driving force for synchronously moving the second vibrating diaphragm outwards through the first acoustic suspension piece, meanwhile, the air pressure in the sound box is reduced due to the outwards movement of the first vibrating diaphragm, the air pressure outside the sound box gives a second driving force for inwards moving the second vibrating diaphragm, the second vibrating diaphragm is kept at a relatively static position by utilizing two opposite driving forces and simultaneously acts on the second vibrating diaphragm, nonlinear movement is reduced, noise is reduced, the negative half wave and the positive half wave of an audio signal of the voice coil are the same, and only the moving directions of the vibrating diaphragms are opposite;
(2) When the acoustic reproduction frequency is equal to the resonance frequency of the resonant system, the audio signal of the voice coil is positive half wave: the first vibrating diaphragm moves outwards, a first driving force for synchronously moving the second vibrating diaphragm outwards is given to the second vibrating diaphragm through the first acoustic suspension piece, meanwhile, the air pressure is increased due to the fact that the acoustic reproduction frequency is amplified, so that even if the air pressure in the sound box is reduced, the second driving force can still be provided for the second vibrating diaphragm outwards, the second vibrating diaphragm is acted on simultaneously by using the driving forces with the same directions, the movement amplitude of the second vibrating diaphragm is increased, the effect that the acoustic reproduction frequency is improved is further increased, the negative half wave and the positive half wave of an audio signal of the voice coil are the same, and only the movement directions of the vibrating diaphragms are opposite;
(3) The coaxial assembly mode is utilized, so that the assembly areas of the first vibrating diaphragm and the second vibrating diaphragm are saved, and the volume of the loudspeaker box is reduced;
(4) The first acoustic suspension piece and the second acoustic suspension piece are utilized to provide supporting force for the second vibrating diaphragm, so that the assembly stability of the second vibrating diaphragm can be ensured, meanwhile, the rigid suspension and the centering assembly are saved, and the production cost of products is further reduced.
The utility model also includes the following advantages:
(5) The first acoustic suspension is made of soft materials, so that the second vibrating diaphragm has higher compliance, and compared with the prior art, the emission frequency of the second vibrating diaphragm is higher when the second vibrating diaphragm extends to low frequency.
Drawings
FIG. 1 is a schematic diagram of a membrane module according to embodiment 1 of the present utility model;
FIG. 2 is a schematic longitudinal section of the diaphragm assembly of example 1 of the present utility model;
fig. 3 is a schematic diagram of a speaker structure according to embodiment 1 of the present utility model;
Fig. 4 is a schematic longitudinal sectional view of a speaker according to embodiment 1 of the present utility model;
Fig. 5 is a schematic longitudinal sectional view of a speaker according to embodiment 2 of the present utility model;
FIG. 6 is a schematic structural diagram of embodiment 3 of the present utility model;
FIG. 7 is a schematic view of a hidden rear case according to embodiment 4 of the present utility model;
FIG. 8 is a schematic view of the structure of embodiment 5 of the present utility model;
FIG. 9 is a schematic diagram of the structure of embodiment 6 of the present utility model;
FIG. 10 is a schematic view of the structure of embodiment 7 of the present utility model;
FIG. 11 is a schematic view of the structure of embodiment 8 of the present utility model;
FIG. 12 is a schematic longitudinal section of example 8 of the present utility model.
The figure shows:
1-a first diaphragm;
2-a first acoustic suspension, 21-a first adhesive sheet, 22-a second adhesive sheet;
3-a second diaphragm;
4-a second acoustic suspension, 41-a third adhesive sheet, 41-a fourth adhesive sheet;
5-drive assembly, 51-voice coil, 52-actuator;
6-hollow shell, 61-rear box, 62-front cover;
7-perforating a basket;
8-a bracket;
9-centering support.
Detailed Description
Embodiments of the present utility model will now be described in detail with reference to the drawings, which are intended to be used as references and illustrations only, and are not intended to limit the scope of the utility model.
Example 1
Referring to fig. 1 to 4, in the present embodiment, a diaphragm assembly includes:
a first diaphragm 1;
The first acoustic suspension 2 is annular and is arranged on the periphery of the first vibrating diaphragm 1 in a surrounding manner;
The second vibrating diaphragm 3 is annular and is arranged on the periphery of the first acoustic suspension 2 in a surrounding manner;
A second acoustic suspension 4 having a ring shape and disposed around the outer periphery of the second diaphragm 3;
When the first diaphragm 1 is driven, the first acoustic suspension 2 drives the second diaphragm 3 to move in the same direction.
When the acoustic reproduction frequency is different from the resonance frequency of the resonance system, the audio signal of the voice coil 51 is positive half wave: the first vibrating diaphragm 1 moves outwards and gives a first driving force for synchronously moving the second vibrating diaphragm 3 outwards through the first acoustic suspension piece 2, meanwhile, the air pressure in the sound box is reduced due to the outwards movement of the first vibrating diaphragm 1, the air pressure outside the sound box gives a second driving force for inwards moving the second vibrating diaphragm 3, the two opposite driving forces are used for simultaneously acting on the second vibrating diaphragm 3, so that the second vibrating diaphragm 3 keeps a relatively static position, nonlinear movement is reduced, noise is reduced, the negative half wave and the positive half wave of an audio signal of the voice coil 51 are the same, and only the moving direction of the vibrating diaphragm is opposite;
When the acoustic reproduction frequency is equal to the resonance frequency of the resonance system, the audio signal of the voice coil 51 is positive half wave: the first diaphragm 1 moves outwards and gives the first driving force for synchronously moving outwards to the second diaphragm 3 through the first acoustic suspension 2, and meanwhile, the air pressure is increased due to the fact that the acoustic reproduction frequency is amplified, so that even if the air pressure in the sound box is reduced, the second driving force can still be provided for the second diaphragm 3 outwards, the second diaphragm 3 is enabled to move by utilizing the driving forces with the same directions to act on the second diaphragm 3 at the same time, the moving amplitude of the second diaphragm 3 is increased, the effect that the acoustic reproduction frequency is improved is further increased, the negative half wave and the positive half wave of the audio signal of the voice coil 51 are identical, and the moving direction of the diaphragms is only opposite.
Further preferably, the area (m 2) of the second diaphragm 3 is larger than the area (m 1) of the first diaphragm 1, and m 2 of this embodiment is 1.2-2 times that of m 1; when the second diaphragm has a larger area relative to the first diaphragm, the present embodiment can be made to have the following advantages:
(1) Extended frequency response: improving reproduction of bass sounds, providing a broader audible frequency range, helping to spread the frequency response, especially for low frequencies;
(2) Higher efficiency and sound pressure level: the speaker can produce a stronger sound without having to increase significant power, thereby achieving higher efficiency and a greater sound pressure level;
(3) Lower distortion: helping to reduce distortion, especially for higher volume levels, resulting in more faithful sound reproduction;
(4) Improvement of sound dispersion: can realize more uniform sound in the surrounding environment so as to realize better sound dispersion, and is particularly suitable for low frequency;
(5) Relieving the pressure on the first diaphragm: by using a larger second diaphragm, the pressure on the first diaphragm can be reduced, its durability improved and power better managed.
Preferably, the first acoustic suspension 2 and the second acoustic suspension 4 are both made of a soft material.
In the present embodiment, the first acoustic suspension 2 and the second acoustic suspension 4 may be made of, but not limited to, silicone rubber, and thermoplastic elastomer; further, the cross sections of the first acoustic suspension 2 and the second acoustic suspension 4 are semicircular, which is beneficial to improving the deformation amount.
Preferably, the inner peripheral portion of the first acoustic suspension 2 is fixed to the outer peripheral portion of the first diaphragm 1, and the outer peripheral portion is fixed to the inner peripheral portion of the second diaphragm 3; the inner peripheral portion of the second acoustic suspension 4 is bonded and fixed to the outer peripheral portion of the second diaphragm 3.
Preferably, the inner part Zhou Buhuan of the first acoustic suspension 2 is provided with a first adhesive sheet 21, the outer part Zhou Buhuan is provided with a second adhesive sheet 22, the inner part Zhou Buhuan of the second acoustic suspension 4 is provided with a third adhesive sheet 41, and the outer part Zhou Buhuan is provided with a fourth adhesive sheet 41; the first diaphragm 1 is fixed to the first adhesive sheet 21 by glue, and the second diaphragm 3 is fixed to the second adhesive sheet 22 and the third adhesive sheet 41 by glue.
The embodiment also provides a speaker, including at least one diaphragm assembly, further including:
The driving assembly 5 comprises a voice coil 51 and a transmission structure 52, and the voice coil 51 is in transmission connection with the first vibrating diaphragm 1 through the transmission structure 52;
The hollow shell 6 is provided with an assembly hole for installing the second acoustic suspension 4, and the driving assembly 5 is arranged in the inner cavity of the hollow shell 6.
Preferably, the hollow housing 6 comprises:
a rear case 61 having an opening formed in a front side thereof;
a front cover 62 provided on the front side of the rear case 61 and capable of closing the opening; the assembly hole is formed in the front cover 62.
In this embodiment, the driving unit 5 is disposed on the rear case 61.
Preferably, the transmission structure 52 is a rod-shaped body and is disposed along the length direction of the rear case 61, and the voice coil 51 and the first diaphragm 1 implement different-axis transmission through the transmission structure 52.
Preferably, the diaphragm assembly is provided with two groups, two assembly holes are formed in the front cover 62, the driving assembly 5 is located between the two assembly holes, the middle part of the transmission structure 52 is connected with the transmission structure 52, and two ends of the transmission structure 52 are respectively connected with the two first diaphragms 1. By the different-axis design, the stacking of parts on the same axis is reduced, and the thickness of the hollow shell 6 is reduced.
Example 2
This embodiment differs from embodiment 1 in that:
Referring to fig. 5, in the present embodiment, the driving component 5 is disposed on the front cover 62, so as to further reduce the thickness of the hollow housing 6.
The rest of this embodiment is the same as embodiment 1, and will not be described here again.
Example 3
This embodiment differs from embodiment 1 in that:
Referring to fig. 6, in the present embodiment, the transmission structure 52 is a rod, and is disposed along the thickness direction of the rear case 61, and the voice coil 51 and the first diaphragm 1 implement coaxial transmission through the transmission structure 52.
In this embodiment, the device further includes a perforated basket 7, the front end of the perforated basket 7 is connected with the assembly hole, a through hole for installing the membrane assembly is formed in the perforated basket 7, and the driving assembly 5 is disposed at the rear end of the perforated basket 7.
The rest of this embodiment is the same as embodiment 1, and will not be described here again.
Example 4
This embodiment differs from embodiment 3 in that:
Referring to fig. 7, in the present embodiment, there are two perforated baskets 7, and each perforated basket 7 is provided with a diaphragm assembly and a driving assembly 5; both perforated baskets 7 are fixed on the same front cover 62;
The rest of this embodiment is the same as embodiment 3, and will not be described here.
Example 5
This embodiment differs from embodiment 1 in that:
Referring to fig. 8, in the embodiment, the first diaphragm 1 is a passive diaphragm, the second diaphragm 3 is an active diaphragm, one end of the transmission structure 52 is connected with the voice coil 51, and two connecting portions are disposed at the other end of the transmission structure 52 and are respectively connected with the second diaphragm 3.
The rest of this embodiment is the same as embodiment 1, and will not be described here again.
Example 6
This embodiment differs from embodiment 1 in that:
Referring to fig. 9, the embodiment further includes a support 8, the support 8 is in a [ -shape, two ends of the support 8 are respectively fixed to inner end sides of the front cover 62, the driving assembly 5 is disposed at a center of the support 8, the transmission structure 52 is in a ring shape, one end of the transmission structure 52 is sleeved on the voice coil 51, and the other end is connected with the first diaphragm 1.
The rest of this embodiment is the same as embodiment 1, and will not be described here again.
Example 7
This embodiment differs from embodiment 6 in that:
Referring to fig. 10, in the present embodiment, two driving assemblies 5 are provided, the two driving assemblies 5 are respectively disposed on the support 8, and inner ends of the two driving assemblies are connected with the first diaphragm 1.
The rest of this embodiment is the same as embodiment 6, and will not be described here.
Example 8
This embodiment differs from embodiment 3 in that:
Referring to fig. 11 and 12, in the present embodiment, the first diaphragm 1 is tapered and gradually tapers from outside to inside, and the transmission structure 52 is annular and integrally formed at the inner end of the first diaphragm 1 and is in transmission connection with the voice coil of the driving assembly 5; the driving assembly 5 is arranged at the rear end of the perforated basket 7, and the second acoustic suspension 4 is arranged at the front end of the perforated basket 7.
Further, the device also comprises a centering support piece 9, wherein the centering support piece 9 comprises a plurality of concentric circular rings, and a round hole for a transmission structure 52 to pass through is formed in the center of the centering support piece 9; the centering support 9 ensures the axial movement of the first diaphragm 1 along the loudspeaker and limits the transverse movement.
The rest of this embodiment is the same as embodiment 3, and will not be described here.
The above disclosure is illustrative of the preferred embodiments of the present utility model and should not be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. A diaphragm assembly, comprising:
a first diaphragm;
the first acoustic suspension piece is annular and is annularly arranged on the periphery of the first vibrating diaphragm;
the second vibrating diaphragm is annular and is annularly arranged on the periphery of the first acoustic suspension piece;
the second acoustic suspension piece is annular and is annularly arranged on the periphery of the second vibrating diaphragm;
When the first vibrating diaphragm is driven, the first acoustic suspension piece drives the second vibrating diaphragm to move in the same direction.
2. The diaphragm assembly of claim 1, wherein the first acoustic suspension and the second acoustic suspension are each made of a soft material.
3. The diaphragm assembly of claim 1, wherein the inner perimeter of the first acoustic suspension is adhesively secured to the outer perimeter of the first diaphragm and the outer perimeter is adhesively secured to the inner perimeter of the second diaphragm; and the inner peripheral part of the second acoustic suspension is adhered and fixed with the outer peripheral part of the second vibrating diaphragm.
4. A diaphragm assembly according to claim 3, wherein the first acoustic suspension has a first adhesive tab on the inner part Zhou Buhuan and a second adhesive tab on the outer part Zhou Buhuan, and wherein the second acoustic suspension has a third adhesive tab on the inner part Zhou Buhuan and a fourth adhesive tab on the outer part Zhou Buhuan; the first vibrating diaphragm is fixed with the first bonding sheet through glue, and the second vibrating diaphragm is fixed with the second bonding sheet and the third bonding sheet through glue respectively.
5. A loudspeaker comprising at least one diaphragm assembly according to any one of claims 1 to 4, further comprising:
the driving assembly comprises a voice coil and a transmission structure, and the voice coil is in transmission connection with the first vibrating diaphragm through the transmission structure;
the hollow shell is provided with an assembly hole for installing the second acoustic suspension, and the driving assembly is arranged in the inner cavity of the hollow shell.
6. A loudspeaker according to claim 5, wherein the hollow housing comprises:
The front side of the rear box body is provided with an opening;
the front cover is arranged at the front side of the rear box body and can cover the opening; the assembly hole is formed in the front cover.
7. The loudspeaker of claim 6, wherein the transmission structure is a rod-shaped body and is arranged along the length direction of the rear case, and the voice coil and the first vibrating diaphragm realize different-axis transmission through the transmission structure.
8. The loudspeaker of claim 7, wherein the diaphragm assembly is provided with two sets, the front cover is provided with two assembly holes, the driving assembly is located between the two assembly holes, the middle part of the transmission structure is connected with the transmission structure, and two ends of the transmission structure are respectively connected with the two first diaphragms.
9. The loudspeaker of claim 6, wherein the transmission structure is a rod-shaped body and is disposed along a thickness direction of the rear case, and the voice coil is coaxially transmitted with the first diaphragm through the transmission structure.
10. The loudspeaker of claim 9, further comprising a perforated basket, wherein a front end of the perforated basket is connected to the assembly hole and is provided with a through hole for installing a diaphragm assembly, and wherein the driving assembly is provided at a rear end of the perforated basket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323285436.3U CN221448580U (en) | 2023-12-04 | 2023-12-04 | Diaphragm assembly and loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323285436.3U CN221448580U (en) | 2023-12-04 | 2023-12-04 | Diaphragm assembly and loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221448580U true CN221448580U (en) | 2024-07-30 |
Family
ID=92065635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323285436.3U Active CN221448580U (en) | 2023-12-04 | 2023-12-04 | Diaphragm assembly and loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221448580U (en) |
-
2023
- 2023-12-04 CN CN202323285436.3U patent/CN221448580U/en active Active
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