CN216134589U - Dome, diaphragm, electro-acoustic converter and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses a dome, a vibrating diaphragm, an electroacoustic converter and electronic equipment, wherein the dome comprises a substrate layer; the reinforcing layer is arranged on the base material layer; and a first shielding layer, the first shielding layer set up in the substrate layer deviates from the surface of strengthening layer, or, the first shielding layer set up in the strengthening layer deviates from the surface of substrate layer, first shielding layer is used for shielding the magnetic field and gets into the speaker. This application embodiment is through increasing the shielding layer for electroacoustic transducer during operation, shielding layer can shield in the magnetic field enters into electroacoustic transducer, thereby can eliminate the noise, promotes electroacoustic transducer's performance. Meanwhile, the shielding layer is arranged to enhance the structural rigidity of the dome and improve the Young modulus of the dome, so that the high-frequency cut-off frequency of the frequency response of the electroacoustic transducer is improved, and the requirement of a user on the high-tone quality is met; and enhancing the waterproof performance of the ball top.

Description

Ball top, vibrating diaphragm, electroacoustic converter and electronic equipment

Technical Field

The application relates to the technical field of electroacoustic conversion, in particular to a dome, a vibrating diaphragm, an electroacoustic converter and an electronic device.

Background

In recent years, with the development of science and technology, more and more electronic devices are appearing in people's daily life, and smart phones, tablet computers, notebook computers, multifunctional media players and the like become indispensable daily necessities. In these electronic devices, the electroacoustic transducer is an indispensable component inside the electronic device, and the quality of the voice will directly affect the experience of the user when using the electronic device.

However, the electronic device includes an antenna and other devices capable of generating a magnetic field in addition to the electroacoustic transducer, and the magnetic field generated by the antenna and other devices may cause the electroacoustic transducer to generate a loud sound during use, which may affect the user experience.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a ball top, vibrating diaphragm, electroacoustic transducer and electronic equipment, through increasing the shielding layer for electroacoustic transducer during operation, shielding layer can shield in magnetic field enters into electroacoustic transducer, thereby can eliminate the noise, promotes electroacoustic transducer's performance.

In a first aspect, embodiments of the present application provide a dome for use in an electroacoustic transducer, the dome including:

a substrate layer;

the reinforcing layer is arranged on the base material layer; and

first shielding layer, first shielding layer set up in the substrate layer deviates from the surface of strengthening layer, or, first shielding layer set up in the strengthening layer deviates from the surface of substrate layer, first shielding layer is used for shielding the magnetic field and gets into electroacoustic transducer.

In a second aspect, an embodiment of the present application provides a diaphragm, where the diaphragm is used in an electroacoustic transducer, and the diaphragm includes:

the vibrating diaphragm main body is used for covering a voice coil of the electroacoustic converter; and

the first shielding layer is arranged on the diaphragm main body and used for shielding a magnetic field from entering the electroacoustic converter.

In a third aspect, embodiments of the present application provide an electroacoustic transducer, including any of the diaphragms and the voice coil described above.

In a fourth aspect, embodiments of the present application provide an electronic device, including an electroacoustic transducer as any of the above.

The utility model provides a dome, vibrating diaphragm, electroacoustic transducer and electronic equipment through increasing the shielding layer for electroacoustic transducer during operation, shielding layer can shield in the magnetic field enters into electroacoustic transducer, thereby can eliminate the noise, promotes electroacoustic transducer's performance. Meanwhile, the shielding layer is arranged to enhance the structural rigidity of the dome and improve the Young modulus of the dome, so that the high-frequency cut-off frequency of the frequency response of the electroacoustic transducer is improved, and the requirement of a user on the high-tone quality is met; and enhancing the waterproof performance of the ball top.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective exploded view of an electroacoustic transducer provided in an embodiment of the present application;

fig. 2 is a cross-sectional view of the electroacoustic transducer shown in fig. 1;

fig. 3 is a cross-sectional view of a diaphragm in the electroacoustic transducer shown in fig. 2;

FIG. 4 is an enlarged view of the structure at A in FIG. 2;

fig. 5 is a cross-sectional view of a dome in the electroacoustic transducer shown in fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.

The embodiment of the application provides electronic equipment. The electronic device may be any device having the electroacoustic transducer 100, such as a smart phone, a tablet computer, a notebook computer, a multifunctional media player, and the like.

Since the electronic apparatus generally includes a device capable of generating a magnetic field in addition to the electroacoustic transducer 100; for example, the electronic device further comprises an antenna, the antenna generates a transmitting signal every 4.615ms or so, the duration is about 15/26ms, the maximum current absorbed can reach more than 2A, the power supply or the ground can fluctuate, and then the loop of the power supply and ground return flow path forms a low-frequency magnetic field about 217 Hz. The electroacoustic transducer in the related art cannot absorb such a magnetic field varying at a low frequency, and thus, the alternating magnetic field acts on the voice coil when entering the electroacoustic transducer to change the vibration direction and frequency of the voice coil, which causes the electroacoustic transducer to be accompanied by noise and the like when being used. For this reason, the electroacoustic transducer 100 according to the embodiment of the present application is additionally provided with the shielding layer 110 capable of shielding the magnetic field from entering the electroacoustic transducer 100.

The thickness of the shielding layer 110 may be greater than or equal to 5 μm and less than or equal to 15 μm, so that the shielding layer 110 can achieve both the light weight and the miniaturization of the electroacoustic transducer 100 while shielding the external magnetic field. Specifically, the thickness of the shielding layer 110 may be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, or 15 μm.

In order to provide the shielding layer 110 with a good magnetic field shielding effect, the relative permeability of the shielding layer 110 may be greater than or equal to 100 and less than or equal to 600. Specifically, the relative permeability of the shield layer 110 may be 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, and 600.

The shielding layer 110 may be a high permeability magnetic alloy material coating, which can effectively absorb the magnetic field, so that the magnetic field is released in the form of heat energy inside the permeability magnetic material, thereby reducing electromagnetic interference to the electroacoustic transducer 100, improving the usability of the electroacoustic transducer 100, and reducing the design difficulty of designers. Meanwhile, the high-permeability alloy material coating has a high modulus characteristic, so that the structural rigidity of the electroacoustic converter 100 can be improved, and the high-frequency cut-off frequency of the electroacoustic converter 100 can be improved; for example, the high frequency cutoff frequency of the electroacoustic transducer 100 may be made to be 9.5 KHz.

Specifically, the shielding layer 110 may be one or more of ferrite, soft iron-nickel magnet, and silicon alloy. When the shielding layer 110 is made of a plurality of materials including ferrite, soft iron-nickel magnet, and silicon alloy, the materials may be first mixed to form a single layer structure, or may be stacked together after each is independently formed into a layer structure. For example, when the shielding layer 110 is made of a material including ferrite, soft iron-nickel magnet, and silicon alloy, the ferrite, soft iron-nickel magnet, and silicon alloy may be mixed and pressed together to form the shielding layer 110; it is also possible to form the first layer structure solely of ferrite, the second layer structure of soft iron-nickel magnet, and the third layer structure of silicon alloy, and then to stack the first layer structure, the second layer structure, and the third layer structure to form the shielding layer 110. Wherein, the ferrite can be granular, and the iron-nickel soft magnet and the silicon alloy can be powdery.

It is to be understood that the electroacoustic transducer 100 may be any device that can be used for electroacoustic transduction, such as a speaker, a microphone, and the like. The following description will be made in detail by taking the electroacoustic transducer 100 as a speaker as an example:

referring to fig. 1 and 2, the electroacoustic transducer 100 may include a magnetic circuit system, a vibration system, and an auxiliary system. The magnetic circuit system may include a yoke 121, a magnetic steel 122 disposed on the yoke 121, and a pole piece 123 attached to an upper surface of the magnetic steel 122. The vibration system may include a diaphragm 124 and a voice coil 125 for driving the diaphragm 124 to vibrate, a magnetic field is formed around the magnetic steel 122, and at least a portion of the voice coil 125 is suspended in the magnetic field. The auxiliary system may include a frame 126, a front cover 127 connected to the frame 126 to form a receiving space, and a conductive terminal 128 for electrically connecting the speaker to the outside. The magnetic yoke 121 is received and fixed in the frame 126, and the outer periphery of the diaphragm 124 is fixed on the frame 126.

Since the diaphragm 124 is disposed on the voice coil 125, the shielding layer 110 may be disposed on the diaphragm 124 in order to prevent an external magnetic field from entering the speaker to affect the vibration frequency and direction of the voice coil 125, and thus the using effect of the speaker; that is, referring to fig. 3, the diaphragm 124 may include a diaphragm main body 1241 covering the voice coil 125 and a shielding layer 110 disposed on the diaphragm main body 1241.

Specifically, the diaphragm body 1241 may include a dome 1242 and a diaphragm 1243, wherein the diaphragm 1243 covers the voice coil 125, the diaphragm 1243 includes a fixing portion 12431 and a bending portion 12432 surrounding the fixing portion 12431, and the dome 1242 is connected to a side of the fixing portion 12431 away from the voice coil 125. Preferably, the shielding layer 110 can be disposed on the dome 1242, and the yield of forming the shielding layer 110 on the dome 1242 is high because the thickness of the dome 1242 is relatively large. Meanwhile, the shielding layer 110 is also provided with a function of enhancing the structural rigidity of the dome 1242 and improving the Young modulus of the dome 1242, so that the high-frequency cut-off frequency of the frequency response of the electroacoustic transducer 100 is improved, and the requirement of a user on the quality of high-frequency sound is met; and enhancing the waterproof performance of the dome 1242.

Further, referring to fig. 4, the orthographic projection of the dome 1242 on the diaphragm 1243 may wrap the orthographic projection of the voice coil 125 on the diaphragm 1243. Through the arrangement, after the shielding layer 110 is arranged on the dome 1242, the external magnetic field can be almost completely prevented from entering the voice coil 125, and the magnetic field shielding performance is better.

Specifically, referring to fig. 5, the dome 1242 may further include a substrate layer 12421 and a reinforcing layer 12422 besides the shielding layer 110, the reinforcing layer 12422 may be disposed on the substrate layer 12421, and the shielding layer 110 may be disposed on a surface of the substrate layer 12421 facing away from the reinforcing layer 12422 or a surface of the reinforcing layer 12422 facing away from the substrate layer 12421.

Further, for improving the structural strength of the dome 1242, the dome 1242 may include two reinforcing layers 12422, and the two reinforcing layers 12422 are respectively disposed on two sides of the substrate layer 12421, and at this time, one side of the at least one reinforcing layer 12422 away from the substrate layer 12421 may be provided with the shielding layer 110. Preferably, the shielding layer 110 is disposed on both sides of the two reinforcing layers 12422 away from the substrate layer 12421; by arranging the shielding layers 110, the electromagnetic shielding effect of the electroacoustic transducer 100 can be enhanced, and the two shielding layers 110 are symmetrically arranged outside the two reinforcing layers 12422, and can be formed together by a double-sided processing technology, so that the forming is convenient.

The density of the substrate layer 12421 may range from 0.1 to 0.5g/cm³(ii) a For example, the density of the substrate layer 12421 may be 0.10g/cm³、0.15g/cm³、0.20g/cm³、0.25g/cm³、0.30g/cm³、0.35g/cm³、0.40g/cm³、0.45g/cm³、0.50g/cm³And the like. The thickness may range from 50 to 100 μm; for example, the thickness of the substrate layer 12421 may be 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm. The substrate layer 12421 may be one or more of PMI (polymethacrylimide foam), micro-foamed reflective plate, PI (Polyimide), PAI (amide-based plastic) and PPS (polyphenylene sulfide plastic), and the substrate layer 12421 may also include one or more of polystyrene, rigid polyurethane, phenolic resin, amino resin, epoxy resin, rigid polyvinyl chloride, and the like.

The thickness of the stiffening layer 12422 may be in the range of 5-15 μm; for example, the thickness of the stiffening layer 12422 may be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, or the like. The reinforcement layer 12422 may be made of a high modulus material, for example, the reinforcement layer 12422 may include one or more of aluminum foil, magnesium-lithium alloy foil, titanium foil, PI (Polyimide), LCP (Liquid Crystal Polymer), PET (Polyethylene terephthalate), and PEN (Polyethylene Naphthalate); in other embodiments, the stiffening layer 12422 may also include one or more of lithium aluminum alloy foil, magnesium aluminum alloy foil, or PPE (polyphenylene ether).

It is understood that the substrate layer 12421 and the reinforcing layer 12422 may be connected by an adhesive layer. The thickness of the adhesive layer can be in the range of 5-20 μm; for example, the adhesive layer 2 may have a thickness of 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, or the like. The adhesive layer may be an adhesive, and in this embodiment, the adhesive may include one or more of epoxy resin, phenolic resin, acrylic resin, silica gel, and the like; of course, the adhesive is used for bonding and fixing the substrate layer 12421 and the reinforcing layer 12422, so that the substrate layer 12421 and the reinforcing layer 12422 can be bonded and fixed by the adhesive; for example, in other embodiments, the adhesive may also include, for example, one or more of cellulose esters, vinyl polymers, polyethers, polyamides, phenolic-nitrile glues, phenolic-neoprene glues, phenolic-polyurethane glues, epoxy-nitrile glues, epoxy-polysulfide glues, and the like.

Of course, in order to further improve the magnetic field shielding performance of the electroacoustic transducer 100, the sound film 1243 may also be provided with a shielding layer. Specifically, the fixing portion 12431 and/or the edge portion 12432 of the sound film 1243 may be provided with a shielding layer. For the sake of distinction, the shielding layer 110 disposed on the dome 1242 may be defined as a first shielding layer, and the shielding layer disposed on the acoustic film 1243 may be defined as a second shielding layer, and the characteristics of the two shielding layers may be the same, with only a difference in arrangement position.

It should be noted that, for the microphone, the component does not have a dome, so when the electroacoustic transducer 100 is a microphone, a shielding layer may be optionally disposed on the diaphragm of the microphone without the dome; the electroacoustic transducer 100 is a loudspeaker, and optionally a shielding layer may be disposed on the sound film 1243 of the diaphragm 124 in the loudspeaker, or the shielding layer 110 may be disposed on the dome 1242 of the diaphragm 124 in the loudspeaker.

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims (10)

1. A dome for use in an electroacoustic transducer, the dome comprising:

a substrate layer;

the reinforcing layer is arranged on the base material layer; and

first shielding layer, first shielding layer set up in the substrate layer deviates from the surface of strengthening layer, or, first shielding layer set up in the strengthening layer deviates from the surface of substrate layer, first shielding layer is used for shielding the magnetic field and gets into electroacoustic transducer.

2. The dome according to claim 1, wherein the dome includes two of the reinforcing layers, the two reinforcing layers are respectively disposed on two opposite surfaces of the substrate layer, and at least one of the reinforcing layers is disposed on a surface of the substrate layer away from the first shielding layer.

3. The dome of claim 1 wherein the relative magnetic permeability of the first shield layer is 100 to 600.

4. A diaphragm for use in an electroacoustic transducer, the diaphragm comprising:

the vibrating diaphragm main body is used for covering a voice coil of the electroacoustic converter; and

the first shielding layer is arranged on the diaphragm main body and used for shielding a magnetic field from entering the electroacoustic converter.

5. The diaphragm of claim 4, wherein the diaphragm body comprises:

the voice film is used for covering the voice coil; and

the dome, the dome set up in the sound membrane deviates from one side of voice coil loudspeaker voice coil, first shielding layer set up in the dome.

6. The diaphragm of claim 5, wherein an orthographic projection of the dome on the diaphragm wraps an orthographic projection of the voice coil on the diaphragm, so that the first shielding layer can cover the voice coil.

7. The diaphragm of claim 5, wherein the diaphragm comprises:

the fixing part is used for covering the voice coil, and the ball top is arranged on one side of the fixing part, which is far away from the voice coil; and

the folded ring part is arranged on the periphery of the fixing part in a winding mode, and the folded ring part and/or the fixing part are/is provided with a second shielding layer.

8. The diaphragm of claim 4, wherein the relative magnetic permeability of the first shielding layer is 100-600.

9. An electroacoustic transducer comprising the diaphragm of any one of claims 4 to 8 and the voice coil.

10. An electronic device characterized by comprising the electroacoustic transducer of claim 9.

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