WO2021179492A1

WO2021179492A1 - Dome and loudspeaker

Info

Publication number: WO2021179492A1
Application number: PCT/CN2020/099550
Authority: WO
Inventors: 翟成祥; 孔洋洋
Original assignee: 歌尔股份有限公司
Priority date: 2020-03-13
Filing date: 2020-06-30
Publication date: 2021-09-16
Also published as: CN111263280A

Abstract

Disclosed in the present invention are a dome and a loudspeaker. The dome comprises: a dome body provided with a first side surface and a second side surface which are opposite to each other, wherein the first side surface comprises a middle area and a peripheral area surrounding the middle area, and the peripheral area is used for being combined with a diaphragm of the loudspeaker; and a heat radiation enhancement layer provided on the second side surface and/or the middle area. The technical solutions of the present invention can improve the heat-dissipation performance of the loudspeaker.

Description

Dome and speakers

Technical field

The present invention relates to the technical field of sound emitting devices, in particular to a dome and loudspeaker.

Background technique

With the rapid development of smart phones, the application scenarios of mobile phones are becoming wider and wider, and users have higher and higher requirements for all aspects of mobile phones. Playing games, watching blockbuster movies, and enjoying music all require high-quality sound effects. This puts forward higher requirements for the loudspeaker, the loudness should be large, and the sound quality should be good. High loudness is often accompanied by high power, and the sound efficiency of the speaker itself is very low, so most of the input power becomes heat. However, the temperature resistance of each component of the speaker is limited. In order to prevent the speaker from being burned out by high temperature, it is necessary to improve the heat dissipation performance of the speaker.

Summary of the invention

The main purpose of the present invention is to provide a dome, aiming to improve the heat dissipation performance of the speaker with the dome.

In order to achieve the above-mentioned objects, the dome provided by the present invention is used for speakers, and includes:

The dome body has a first side surface and a second side surface opposite to each other. The first side surface includes a middle area and a peripheral area surrounding the middle area, and the peripheral area is used to combine with the diaphragm of the speaker ;as well as

The heat radiation enhancement layer is arranged on the second side surface and/or the middle area.

Optionally, the thickness of the heat radiation enhancement layer is less than or equal to 20 microns.

Optionally, the thickness of the heat radiation enhancement layer is greater than or equal to 3 microns.

Optionally, the heat radiation enhancing material used in the heat radiation enhancing layer is one or more of nano-carbon, graphene, carbon tube, boron nitride, silicon carbide, and aluminum nitride.

Optionally, the heat radiation enhancement layer is a granular layer.

Optionally, the dome body includes a foamed material layer and a thermally conductive material layer covering the foamed material layer; or, the dome body is a plastic layer.

Optionally, the thermally conductive material layer is a metal material layer.

Optionally, the plastic layer is a PEN layer or a PET layer.

The present invention also provides a loudspeaker including a diaphragm and the aforementioned dome, and the peripheral area of the first side surface of the dome is combined with the diaphragm.

Optionally, the peripheral area and the diaphragm are combined by a thermally conductive adhesive.

In the technical solution of the present invention, a heat radiation enhancement layer is added to the second side surface and/or the middle area to increase the heat radiation capability of the dome, thereby improving the heat dissipation capability of the dome; thus, the heat generated by the voice coil After being transferred to the dome via the diaphragm, it can radiate through the heat radiation enhancement layer with a larger area of the dome, thereby improving the heat dissipation effect of the speaker.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Fig. 1 is a schematic structural diagram of an embodiment of a loudspeaker of the present invention;

Figure 2 is an enlarged view of A in Figure 1;

3 is a schematic structural diagram of an embodiment of the dome of the speaker in FIG. 1;

4 is a schematic structural diagram of another embodiment of the dome of the speaker in FIG. 1;

Figure 5 is a graph of the temperature rise comparison between the dome of the invention and the ordinary dome.

Attached icon number description:

标号Label	名称 name	标号Label		名称name
1010	球顶Ball top	1111	球顶本体 Dome body
111111	发泡材质层 Foam material layer	112112	导热材质层Thermal conductive material layer
1212	热辐射增强层Heat radiation enhancement layer	2020	振膜 Diaphragm
3030	音圈Voice coil	To	To

The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications. Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" in the full text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Also does not fall within the scope of protection required by the present invention.

The invention proposes a dome.

1 and 2, in an embodiment of the present invention, the dome 10 is used for a speaker, and the speaker further includes a diaphragm 20 and a voice coil 30. The dome 10 is coupled to one side of the diaphragm 20, and the voice coil 30 is coupled On the other side of the diaphragm 20.

Referring to FIG. 3 together, in this embodiment, the dome 10 includes:

The dome body 11 has a first side surface and a second side surface opposite to each other, the first side surface includes a middle area and a peripheral area surrounding the middle area, and the peripheral area is used for combining with the diaphragm 20; and

The heat radiation enhancement layer 12 is arranged on the second side surface.

Obviously, in this embodiment, the second side surface is the side of the dome body 11 facing away from the diaphragm 20 and facing the air. Therefore, the radiation direction of the heat radiation enhancement layer 12 provided on the second side surface is toward the air. , And radiate heat into the air.

However, the present design is not limited to this. In some other embodiments, the heat radiation enhancement layer 12 is provided in the middle area; it can be understood that although the first side surface of the dome body 11 faces the diaphragm 20 and faces away from the air However, the position corresponding to the middle area on the diaphragm 20 is usually hollowed out, so the heat radiation enhancement layer 12 disposed in the middle area can radiate heat to the magnetic circuit system of the speaker through the hollowed out position on the diaphragm 20, The heat is dissipated into the air through the outer surface of the magnetic circuit system. Of course, in some other embodiments, the heat radiation enhancement layer 12 may be provided on both the second side surface and the middle area, so as to radiate heat into the air through two radiation directions and radiation paths.

It should be noted here that the aforementioned embodiments are all based on "the dome 10 is coupled to one side of the diaphragm 20, and the voice coil 30 is coupled to the other side of the diaphragm 20". However, in practical applications, the dome 10 and the voice coil 30 can also be located on the same side of the diaphragm 20 (the side facing the magnetic circuit system). At this time, the middle area can face the air through the hollow position on the diaphragm 20. The second side is facing away from the air and facing the magnetic circuit system. In this application, similarly, the second side and/or the middle area is provided with a heat radiation enhancement layer 12, but The radiation direction and radiation path of the heat radiation enhancement layer 12 of the second side surface and the middle region are just opposite to those of the previous embodiment.

In addition, in order to prevent the heat radiation enhancement layer 12 from limiting the heat transfer efficiency between the diaphragm 20 and the dome 10, the heat radiation enhancement layer 12 is usually not provided on the peripheral area.

It can be understood that in the speaker, the main heat source is the voice coil 30, and the heat generated by the voice coil 30 will be transferred to the diaphragm 20, and then from the diaphragm 20 to the dome 10.

In the technical solution of the present invention, a heat radiation enhancement layer 12 is added to the second side surface and/or the middle area to increase the heat radiation capacity of the dome 10, thereby improving the heat dissipation capacity of the dome 10; thus, the voice coil 30 After the generated heat is transferred to the dome 10 via the diaphragm 20, it can be radiated through the heat radiation enhancement layer 12 of the dome 10 with a larger area, thereby improving the heat dissipation effect of the speaker.

Further, the thickness of the heat radiation enhancement layer 12 is less than or equal to 20 microns. It can be understood that if the heat radiation enhancement layer 12 is too thick, more heat radiation enhancement materials are required, the cost is higher, and the weight of the heat radiation enhancement layer 12 will be heavier, making the dome 10 Excessive weight gain affects acoustic performance.

Further, the thickness of the heat radiation enhancement layer 12 is greater than or equal to 3 microns. It can be understood that if the heat radiation enhancement layer 12 is too thin, it will not be conducive to the spreading of the heat radiation enhancement layer 12 on the second side surface and/or the middle area, and it is easy to appear that some locations are not heated by the heat. The phenomenon covered by the radiation enhancement layer 12, in this way, will affect the improvement of the heat dissipation capacity of the dome 10.

In this embodiment, the thickness of the heat radiation enhancement layer 12 ranges from 3 μm to 20 μm, and the thickness range is moderate, so as to take into account the low cost, low weight, and ease of full preparation of the heat radiation enhancement layer 12; and, The thickness is small, so that the dome 10 of the present invention has no obvious increase in thickness and weight compared with the ordinary dome 10, so that the acoustic performance of the speaker is basically unchanged.

Further, the heat radiation enhancing material used in the heat radiation enhancing layer 12 is one or more of nano-carbon, graphene, carbon tube, boron nitride, silicon carbide, and aluminum nitride. It can be understood that nano-carbon, graphene, carbon tube, boron nitride, silicon carbide, aluminum nitride and other materials have high thermal emissivity, which can enhance the heat radiation ability of the dome 10, thereby improving the heat dissipation of the dome 10 Effect. Taking nano-carbon as the heat radiation enhancement material used as an example, the thermal emissivity of nano-carbon is about 0.98, while the thermal emissivity of common aluminum material is only 0.55. It can be seen that nano-carbon material has a higher thermal emissivity; In addition, nano-carbon is black, which is good for absorbing and storing infrared light and heat radiation. In particular, the working temperature of the speaker may reach 100 degrees Celsius, which belongs to infrared light and heat radiation. Therefore, when the dome 10 is close to the side of the magnetic circuit system (for example, When the middle area of the dome in the embodiment of FIG. 1 is provided with a heat radiation enhancement layer 12 and its material is black material such as nano carbon, the heat radiation enhancement layer 12 can also radiate the voice coil 30 well. The heat is absorbed and stored, and the heat is quickly radiated into the air through the air-facing side of the dome 10 (for example, the second side of the dome in the embodiment of FIG. 1).

Furthermore, the heat radiation enhancement layer 12 is a granular layer to increase its heat dissipation surface area, thereby facilitating further enhancement of its heat radiation capability, thereby further improving the heat dissipation capability of the dome 10. In this embodiment, optionally, the heat radiation enhancement layer 12 is obtained by coating, which is usually by preparing a granular heat radiation enhancement material (such as nano carbon) into a coating solution, and then coating The cloth liquid is applied to the second side surface of the dome body 11 and/or the middle area. After the solvent in the coating liquid is volatilized, it can be applied to the second side surface of the dome body 11 and/or the middle area. The cured heat radiation enhancement layer 12 is formed thereon. In order to enhance the bonding force of the coating, optionally, the second side surface of the dome body 11 and/or the middle area may be roughened first, so that the second side surface and/or the middle area are formed with tiny particles. The bump structure.

Referring to Fig. 5, in Fig. 5, the gray temperature rise curve relates to the dome 10 provided with the nano-carbon particle layer of the present invention, and the black temperature rise curve relates to the ordinary dome 10 of the present invention. From the comparison of the temperature rise curves in FIG. 5, it can be seen that, compared with the ordinary dome 10, the dome 10 of the present invention can reduce the temperature rise by about 3.6 degrees Celsius (average value), which shows that the dome 10 of the present invention is compared with Compared with the ordinary dome 10, it has better heat dissipation capacity.

3, in this embodiment, further, the dome body 11 includes a foamed material layer 111 and a thermally conductive material layer 112 covering the foamed material layer 111. It can be understood that the foamed material is light in weight, which is beneficial to the lightening of the dome 10 and prevents the vibration performance of the diaphragm 20 from being affected; on the one hand, the thermal conductive material layer 112 is beneficial to export the heat generated by the voice coil 30 to the heat The radiation enhancement layer 12 can improve the heat dissipation effect of the dome 10, on the other hand, it can enhance the structural strength of the dome 10 and improve its impact resistance.

In this embodiment, optionally, the thermally conductive material layer 112 is a metal material layer; the thermal conductivity of the metal material is relatively high, which is beneficial to export the heat generated by the voice coil 30 to the heat radiation enhancement layer 12, and the metal material is also Has good strength. Further optionally, the metal material layer may be a copper material layer, an aluminum material layer, etc., to take into account high thermal conductivity, low cost, and strong rigidity.

However, the present design is not limited to this. In other embodiments, referring to FIG. 4, the dome body 11 may also be a plastic layer. It can be understood that plastics are lighter in weight, lower in cost, and easy to form and prepare. Optionally, the plastic layer may be, but not limited to, a PEN (polyethylene naphthalate) layer or a PET (polyethylene terephthalate) layer that both have good physical and mechanical properties and heat resistance.

The present invention also proposes a loudspeaker. Referring to Figures 1 and 2, the loudspeaker includes a diaphragm 20 and a dome 10. For the specific structure of the dome 10, refer to the above-mentioned embodiments. Because the present loudspeaker adopts all the technologies of all the above-mentioned embodiments. The solution, therefore, has at least all the beneficial effects brought about by the technical solution of the above-mentioned embodiment, and will not be repeated here. Wherein, the peripheral area of the first side surface of the dome 10 is combined with the diaphragm 20.

Optionally, the peripheral area and the diaphragm 20 are combined with a thermally conductive adhesive to enhance the heat transfer efficiency between the diaphragm 20 and the dome 10, so that the heat generated by the voice coil 30 can quickly pass through the vibration The film 20 is transferred to the dome 10, so that the dome 10 can radiate heat into the air through the heat radiation enhancement layer 12, thereby improving the heat dissipation effect of the speaker.

However, the present design is not limited to this. In some other embodiments, the peripheral area and the diaphragm 20 can also be combined by ordinary adhesive glue, but the thickness of the ordinary adhesive glue is small, for example, 10 microns. ~30 microns, usually 20 microns, so that heat transfer between the diaphragm 20 and the dome 10 can be faster.

Or, in some other embodiments, the peripheral area and the diaphragm 20 are connected by at least one ring of ordinary adhesive glue, and at least one ring of thermally conductive glue is also provided between the peripheral area and the diaphragm 20 , In order to improve the heat transfer efficiency between the diaphragm 20 and the dome 10.

The above descriptions are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.

Claims

A dome for loudspeakers, characterized in that the dome includes:

The dome body has a first side surface and a second side surface opposite to each other. The first side surface includes a middle area and a peripheral area surrounding the middle area, and the peripheral area is used to combine with the diaphragm of the speaker ;as well as

The heat radiation enhancement layer is arranged on the second side surface and/or the middle area.
The dome of claim 1, wherein the thickness of the heat radiation enhancement layer is less than or equal to 20 microns.
The dome of claim 2, wherein the thickness of the heat radiation enhancement layer is greater than or equal to 3 microns.
The dome of claim 1, wherein the heat radiation enhancing material used in the heat radiation enhancing layer is one of nano carbon, graphene, carbon tube, boron nitride, silicon carbide, and aluminum nitride. Kind or more.
The dome of claim 4, wherein the heat radiation enhancement layer is a granular layer.
The dome according to any one of claims 1 to 5, wherein the dome body comprises a foamed material layer and a thermally conductive material layer covering the foamed material layer; or,

The dome body is a plastic layer.
The dome of claim 6, wherein the thermally conductive material layer is a metal material layer.
The dome of claim 6, wherein the plastic layer is a PEN layer or a PET layer.
A loudspeaker, characterized by comprising a diaphragm and the dome according to any one of claims 1 to 9, and the outer area of the first side surface of the dome is combined with the diaphragm.
9. The loudspeaker according to claim 9, wherein the peripheral area and the diaphragm are connected by a thermally conductive adhesive.