CN112543399A

CN112543399A - Diaphragm assembly and loudspeaker

Info

Publication number: CN112543399A
Application number: CN202011375726.5A
Authority: CN
Inventors: 徐增强; 张志兵
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-23
Anticipated expiration: 2040-11-30
Also published as: WO2022111366A1; CN112543399B

Abstract

The embodiment of the application provides a vibrating diaphragm assembly and a loudspeaker. The vibrating diaphragm component comprises a folded ring part and a ceramic ball top, wherein the ceramic ball top is arranged in a hollow area of the folded ring part, a plurality of through holes are formed in the thickness direction of the ceramic ball top, the aperture range of the through holes is 2-25 mu m, and the thickness range of the ceramic ball top is 50-200 mu m. The embodiment of the application provides the vibrating diaphragm subassembly is through setting up a plurality ofly on the thickness direction at ceramic ball top the through-hole can show when the speaker sound production and reduce the pressure differential of ceramic ball top both sides avoids the too high subassembly such as its internal pressure of speaker to cause the influence to its inside sensor, has guaranteed the stable performance and the life of speaker.

Description

Diaphragm assembly and loudspeaker

Technical Field

The application belongs to the technical field of electroacoustic materials, specifically, this application relates to a vibrating diaphragm subassembly and speaker.

Background

In recent years, as the requirement of users for the sound generating device to generate sound is continuously increased, more and more sound generating devices are developed towards high power and high sound quality, which puts forward further requirements on the internal components of the sound generating device.

The dome is used as a core component of a diaphragm assembly in the sound generating device, and the sound quality of the sound generating device is directly influenced. According to the common knowledge in the art, the dome must have sufficient rigidity and toughness to withstand the severe reciprocating motion, and achieve superior high frequency acoustic characteristics. However, the existing dome is generally of an integral plate-shaped structure in order to ensure the rigidity and toughness of the dome, so that the pressure difference between two sides of the vibrating diaphragm assembly is too large in the sounding process of the sounding device, and the pressure sensor inside the sounding device and the assembly with weaker structural strength are affected or even damaged by the too large pressure difference.

Disclosure of Invention

It is an object of embodiments of the present application to provide a new solution for a diaphragm assembly and a loudspeaker.

According to a first aspect of embodiments of the present application, there is provided a diaphragm assembly applied to a speaker, including:

the ceramic ball top is arranged in a hollow area of the folded ring part;

the ceramic ball top is provided with a plurality of through holes in the thickness direction, the aperture range of the through holes is 2-25 mu m, and the thickness range of the ceramic ball top is 50-200 mu m.

Optionally, the aperture of the through hole is in the range of 10-20 μm.

Optionally, a plurality of the through holes are distributed on the top of the ceramic ball in an array.

Optionally, the distance between adjacent through holes is 0.5-2 times of the aperture of the through hole.

Optionally, the material of the ceramic dome comprises at least one of alumina, silica and silicon carbide.

Optionally, the ceramic dome is formed by injection molding, sheet printing or extrusion molding.

Optionally, the ceramic ball top has a porosity in the range of 40% to 75%.

According to a second aspect of embodiments of the present application, there is provided a loudspeaker including a magnetic circuit assembly, a voice coil, and the diaphragm assembly of the first aspect;

one end of the voice coil is connected with the vibrating diaphragm assembly, and the other end of the voice coil is located in a magnetic gap of the magnetic circuit assembly.

Optionally, when the speaker is in a sound emitting state, the pressure difference between two sides of the ceramic dome ranges from 50 Pa to 1000 Pa.

Optionally, a sensor assembly is disposed within the speaker.

One technical effect of the embodiment of the application is as follows:

the embodiment of the application provides a vibrating diaphragm assembly, including dog-ear portion and ceramic ball top, the ceramic ball top set up in dog-ear portion's hollow region, the ceramic ball top is provided with a plurality of through-holes on its thickness direction, the aperture scope of through-hole is 2-25 μm, the thickness scope of ceramic ball top is 50-200 μm. The embodiment of the application provides the vibrating diaphragm subassembly is through setting up a plurality ofly on the thickness direction at ceramic ball top the through-hole for vibrating diaphragm both sides air current accessible the through-hole circulation can show when the speaker sound production and reduce the pressure differential of vibrating diaphragm subassembly both sides has guaranteed the stable performance and the life of speaker.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a ceramic dome according to an embodiment of the present disclosure;

FIG. 2 is a partial top view of a ceramic dome according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a speaker according to an embodiment of the present application.

Wherein: 1-ceramic ball top; 101-a through hole; 2-a hinge part; 11-a diaphragm assembly; 12-a voice coil; 13-magnetic circuit assembly.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1 to 3, an embodiment of the present application provides a diaphragm assembly 11 applied to a speaker, where the diaphragm assembly 11 includes a folded ring portion 2 and a ceramic dome 1, the ceramic dome 1 is disposed in a hollow region of the folded ring portion 2, specifically, the ceramic dome 1 is disposed along a radial direction of the folded ring portion 2, an edge of the ceramic dome 1 is connected to the folded ring portion 2, and the ceramic dome 1 covers the hollow region of the folded ring portion 2 and is connected to an upper side or a lower side of the folded ring portion 2. The ceramic dome 1 is provided with a plurality of through holes 101 in the thickness direction, the aperture range of the through holes 101 is 2-25 μm, and the thickness range of the ceramic dome 1 is 50-200 μm.

Specifically, the ceramic dome 1 and the folded ring part 2 may be bonded to each other, so that the convenience of connection between the ceramic dome 1 and the folded ring part 2 is improved on the basis of ensuring the connection strength between the ceramic dome 1 and the folded ring part 2.

Specifically, the ceramic dome 1 has a generally planar plate-like structure or a spherical plate-like structure, and the ceramic dome 1 is provided with a plurality of through holes 101 in a thickness direction of the plate-like structure thereof. Referring to fig. 1, the ceramic dome 1 is a planar plate-shaped structure, the planar plate-shaped structure of the ceramic dome 1 may include an upper surface and a lower surface, and the plurality of through holes 101 are perpendicular to the surface of the ceramic dome 1, that is, the plurality of through holes 101 penetrate through the upper surface and the lower surface of the ceramic dome 1 and are perpendicular to the upper surface and the lower surface. Under the condition that the speaker is in the vocal state, through-hole 101 can be convenient for the circulation of 1 both sides sound air current of ceramic dome reduces the pressure differential of 1 both sides of ceramic dome, also can reduce the inside pressure of speaker avoids too high pressure to the influence of subassembly such as speaker internal sensor.

The aperture range of the through hole 101 is 2-25 μm, and preferably, the aperture range of the through hole 101 is 10-20 μm. The selection of the aperture of the through hole 101 requires a combination of the acoustic airflow permeability on both sides of the ceramic dome 1 and the water resistance of the ceramic dome 1. Specifically, when the aperture of the through hole 101 is too large, although the sound airflow on both sides of the ceramic dome 1 can smoothly circulate, that is, the sound airflow on both sides of the ceramic dome 1 has good circulation, water droplets outside the speaker may enter the speaker through the through hole 101, and there is a risk of corroding components inside the speaker; when the aperture of the through hole 101 is too small, the ceramic dome 1 may provide the speaker with a good waterproof property, but sound airflow at two sides of the ceramic dome 1 is difficult to smoothly circulate, and the pressure difference between two sides of the ceramic dome 1 is too large, so that the pressure inside the speaker is too large, which may affect the normal operation of components such as the sensor inside the speaker. In the embodiment of the present invention, when the aperture range of the through hole 101 is controlled to be 2-25 μm, or more preferably 10-20 μm, the ceramic dome 1 can improve the waterproof performance of the speaker on the basis of reducing the pressure difference between the two sides thereof, so that the speaker can achieve the waterproof performance of preventing water for 30min under the condition of 15m water depth.

In addition, the thickness of the ceramic dome 1 ranges from 50 to 200 μm. The thickness of the ceramic dome 1 has a great influence on the acoustic performance of a sound generating device such as a speaker. In general, when the ceramic dome 1 has a low thickness, although the vibration sensitivity of the ceramic dome 1 can be improved, the reliability of the ceramic dome 1 is reduced; when the ceramic dome 1 has a large thickness, although the structural reliability of the ceramic dome 1 can be improved, the sensitivity of the ceramic dome 1 is reduced. The embodiment of the application will the thickness control of ceramic ball top 1 is in 50-200 mu m's within range, the preferred 80-150 mu m of thickness of ceramic ball top 1, the thickness control of ceramic ball top 1 can be guaranteeing on the basis of ceramic ball top 1 reliability, namely make the elastic property and the rigidity performance of ceramic ball top 1 can both accord with sound generating mechanism's such as speakers preparation requirement, guarantee ceramic ball top 1's life and sensitivity.

The vibrating diaphragm subassembly that this application embodiment provided is through setting up a plurality ofly on 1 thickness direction in ceramic dome through-hole 101 can show when the speaker sound production and reduce the pressure differential of 1 both sides in ceramic dome avoids the too high subassembly such as its internal pressure of speaker to cause the influence to its inside sensor, has guaranteed the stable performance and the life of speaker.

Optionally, a plurality of the through holes 101 are distributed on the ceramic dome 1 in an array.

Specifically, the array distribution of the plurality of through holes 101 may be a square array, a triangular array, or an oblique array, as shown in fig. 1 and fig. 2, the plurality of through holes 101 are distributed on the ceramic dome 1 in an oblique array. The array distribution of the plurality of through holes 101 can improve the distribution uniformity of the through holes 101, so that the balance of sound airflow circulation at two sides of the ceramic dome 1 is improved, and the local pressure difference at two sides of the ceramic dome 1 is prevented from being too large.

Optionally, the distance between adjacent through holes 101 is 0.5-2 times of the aperture of the through hole 101.

Specifically, in order to avoid stress concentration on the peripheral side of the through holes 101, the through holes 101 may be provided as circular through holes, and the density of the through holes 101 provided on the ceramic dome 1 may be determined according to the relationship between the distance between adjacent through holes 101 and the aperture of the through holes 101. Under the condition that the distance between the adjacent through holes 101 is 0.5-2 times of the aperture of the through holes 101, the density of the through holes 101 on the ceramic dome 1 is moderate, so that on one hand, the pressure difference between two sides of the ceramic dome 1 is not too large, and on the other hand, the structural strength and the stability of the ceramic dome 1 during vibration can be improved.

Optionally, the material of the ceramic dome 1 comprises at least one of alumina, silica and silicon carbide. The ceramic dome 1 made of the above material has the advantages of light weight, high structural strength, good vibration stability, etc., and the ceramic dome 1 can still maintain high strength even when the ceramic dome 1 made of the above material is provided with the plurality of through holes 101. The porosity of the ceramic dome 1 is in the range of 40% to 75%, preferably 50% to 70%, and the porosity is a ratio of the volume of the through-holes 101 to the entire volume of the ceramic dome 1. The specific set value of the porosity needs to be comprehensively determined according to the pressure difference at two sides of the ceramic ball top 1 and the structural strength of the ceramic ball top 1, and the comparison in the embodiment of the application is not limited.

Optionally, the ceramic dome 1 is molded by injection molding, sheet printing or extrusion molding.

Specifically, the preparation method of the ceramic dome 1 generally includes the following processes:

1. mixing the raw materials of the ceramic ball top 1;

2. molding the mixed raw materials in a molding device;

3. and drying and sintering the molded raw materials to obtain the ceramic ball top 1 product.

In a specific preparation method, the raw materials of the ceramic dome 1 comprise alumina powder and urea, the alumina powder and the urea are uniformly mixed and then can be subjected to injection molding under the condition of within 300 ℃, and finally the temperature is kept for 30min under the condition of 150 ℃ to obtain the ceramic dome 1 with the through hole 101, wherein the aperture of the through hole 101 is about 10 mu m; in another specific preparation method, the raw materials of the ceramic dome 1 comprise alumina powder, silica powder and ammonium bicarbonate, the alumina powder, the silica powder and the ammonium bicarbonate are uniformly mixed, then the mixture can be subjected to injection molding under the condition of 90 ℃, and finally the mixture is subjected to heat preservation for 30min under the condition of 150 ℃, so that the ceramic dome 1 with the through holes 101 is obtained, and the aperture of the through holes 101 is about 12 mu m.

The embodiment of the present application further provides a loudspeaker, referring to fig. 3, the loudspeaker includes a magnetic circuit assembly 13, a voice coil 12, and the diaphragm assembly 11;

one end of the voice coil 12 is connected to the diaphragm assembly 11, and the other end of the voice coil 12 is located in the magnetic gap of the magnetic circuit assembly 13.

Specifically, when the voice coil 12 is powered on, an interaction magnetic force is generated between the magnetic circuit assembly 13 and the voice coil 12, and the voice coil 12 drives the diaphragm assembly 11 to vibrate under the action of the magnetic force, so that the ceramic dome 1 vibrates. The through hole 101 on the ceramic dome 1 can reduce the pressure difference on two sides of the ceramic dome 1 in the vibration process of the ceramic dome 1, and ensure the stable sound production of the loudspeaker.

Specifically, under the condition that the loudspeaker is in a sound production state, the pressure difference range of two sides of the ceramic dome 1 is 50-1000 Pa. Traditional dome is generally a holistic platelike structure, and this just leads to sound generating mechanism such as speaker at the in-process of sound production, and the sound air current of traditional dome both sides is difficult to circulate each other for the pressure differential of traditional dome both sides is too big, generally can reach the pressure differential about 0.1MPa, and too big pressure differential can lead to the fact the influence or even damage to the inside pressure sensor of speaker and the less strong subassembly of structural strength. And this application is through set up a plurality ofly on the 1 thickness direction of ceramic dome through-hole 101 can show when the speaker sound production and reduce the pressure differential of 1 both sides of ceramic dome makes the pressure differential of 1 both sides of ceramic dome keeps in the within range of 50-1000Pa, avoids the too high subassembly such as its internal pressure of speaker to cause the influence to its inside sensor, has guaranteed the stable performance and the life of speaker.

Specifically, be provided with sensor assembly in the speaker, sensor assembly specifically can include pressure sensor, temperature sensor and humidity transducer etc. and this type of sensor all needs ambient pressure to keep in certain within range when normal response and test, and too high ambient pressure must increase sensor assembly's response and test error, can lead to even sensor assembly can't normally operate. And the ceramic dome 1 that this application embodiment provided, through set up in the thickness direction of ceramic dome 1 through-hole 101, can make pressure in the speaker is close the ordinary pressure, also is close standard atmospheric pressure, for sensor assembly's steady operation provides the guarantee.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A diaphragm assembly for a loudspeaker, comprising:

the ceramic ball top is arranged in a hollow area of the folded ring part;

2. The diaphragm assembly of claim 1 wherein the aperture of the through hole is in the range of 10-20 μm.

3. The diaphragm assembly of claim 1 wherein a plurality of the through holes are distributed in an array on top of the ceramic balls.

4. The diaphragm assembly of claim 3 wherein the distance between adjacent through holes is 0.5-2 times the aperture of the through hole.

5. The diaphragm assembly of claim 1 wherein the material of the ceramic dome comprises at least one of alumina, silica, and silicon carbide.

6. The diaphragm assembly of claim 1, wherein the ceramic dome is formed by injection molding, sheet printing, or extrusion.

7. The diaphragm assembly of claim 1 wherein the ceramic dome has a porosity in the range of 40% to 75%.

8. A loudspeaker comprising a magnetic circuit assembly, a voice coil, and a diaphragm assembly as claimed in any one of claims 1 to 7;

9. The loudspeaker of claim 8, wherein the pressure differential across the ceramic dome ranges from 50 Pa to 1000Pa when the loudspeaker is in a sound generating state.

10. The loudspeaker of claim 8, wherein a sensor assembly is disposed within the loudspeaker.