CN111711890A

CN111711890A - Dome, loudspeaker monomer and sound generating mechanism

Info

Publication number: CN111711890A
Application number: CN202010595799.9A
Authority: CN
Inventors: 吴德跃; 邵明辉
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-09-25
Also published as: WO2021258606A1

Abstract

The invention discloses a dome, a loudspeaker single body and a sound generating device, wherein the dome is arranged on a vibrating diaphragm of a loudspeaker, the dome comprises at least two sapphire layers which are arranged in a laminated mode, one of the two sapphire layers is used for being combined with one side of the vibrating diaphragm, and at least one of the two sapphire layers is provided with a through hole. The dome of the invention can improve the acoustic performance and quality of the loudspeaker.

Description

Dome, loudspeaker monomer and sound generating mechanism

Technical Field

The invention relates to the technical field of acoustics, in particular to a dome, a loudspeaker single body and a sound generating device.

Background

With the advent of the 5G mobile phone age, higher requirements are put on the material performance of mobile terminals, such as mobile phones. Due to the high frequency of the 5G mobile phone, the terminal antenna is sensitive to peripheral metal and carbide materials, and particularly, the metal material has serious interference on 5G signals. The dielectric constant of the material around the 5G mobile phone antenna affects the bandwidth of the antenna, generally, the higher the dielectric constant is, the stronger the constraint on the electromagnetic field is, and the bandwidth is correspondingly narrowed, so the lower the dielectric constant of the medium around the antenna is, the better the bandwidth is.

In the traditional design, the ball top of the sound generating device is usually made of metal materials, and the metal materials easily interfere with 5G signals due to the fact that the distance between the sound generating device and an antenna in a mobile phone is very short.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

Disclosure of Invention

The invention mainly aims to provide a dome, and aims to solve the problem that the conventional sound generating device generates interference on an antenna of a 5G mobile terminal.

In order to achieve the above object, the present invention provides a diaphragm mounted on a dome of a speaker, wherein the dome includes at least two sapphire layers stacked one on another, one of the sapphire layers is configured to be bonded to one side of the diaphragm, and at least one of the sapphire layers is provided with a through hole.

In an embodiment, the sapphire layer is provided with a plurality of through holes spaced from each other.

In an embodiment, at least two rows of the through holes are arranged on the sapphire layer, and the through holes of the at least two rows are arranged at intervals along the length direction of the dome.

In one embodiment, the through holes are in a circular, oval, polygonal, racetrack or linear structure.

In one embodiment, the dome comprises two or more sapphire layers stacked on each other, and through holes in two adjacent sapphire layers are staggered in the stacking direction.

In one embodiment, two adjacent sapphire layers are bonded to each other.

In one embodiment, the sapphire layer has a thickness greater than or equal to 0.02mm and less than or equal to 0.5 mm.

In one embodiment, a ratio of an area of the via to an area of the sapphire layer is less than or equal to 0.5.

In one embodiment, the sapphire layer is a pure alumina crystal layer, an alumina crystal layer containing titanium ions and iron ions, an alumina crystal layer containing chromium ions, or an alumina crystal layer containing nickel ions.

The invention further provides a loudspeaker single body, which comprises a vibration system, wherein the vibration system comprises a vibration diaphragm and a dome, the dome is installed on the vibration diaphragm, the dome comprises at least two sapphire layers which are arranged in a laminated mode, one of the two sapphire layers is used for being combined with one side of the vibration diaphragm, and at least one of the two sapphire layers is provided with a through hole.

The invention also provides a sound production device, which comprises a shell and a loudspeaker monomer:

the loudspeaker monomer comprises a vibration system, the vibration system comprises a vibrating diaphragm and a dome, the dome is installed on the vibrating diaphragm, the dome comprises at least two sapphire layers which are arranged in a stacking mode, one of the two sapphire layers is used for being combined with one side of the vibrating diaphragm, and at least one of the two sapphire layers is provided with a through hole;

the loudspeaker unit is accommodated in the shell, the top of the loudspeaker unit and the shell are enclosed to form a front sound cavity, and the sound generating device is further provided with a sound outlet channel communicated with the front sound cavity and the outside.

According to the invention, the spherical top comprises at least two sapphire layers which are arranged in a laminated mode, and at least one of the two sapphire layers is provided with the through hole. The sapphire layer has the advantages of high strength, high hardness, high temperature resistance, stable chemical property and the like, and can eliminate the interference on the antenna of a terminal such as a 5G mobile phone and the like when being used as a part of a loudspeaker compared with the traditional metal material. Meanwhile, the high modulus of the sapphire layer is beneficial to improving the high-frequency performance of the loudspeaker, so that the quality of the loudspeaker is better. And set up at least both sides sapphire layer, set up the through-hole on one of them sapphire layer at least, can reduce surface density under the condition that does not influence sapphire layer intensity, reduce the vibration quality, improve the sensitivity and the frequency response of vibration subassembly, and then promote speaker acoustic performance and quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a dome of the present invention;

FIG. 2 is a schematic diagram of another embodiment of a dome and a diaphragm according to the present invention;

FIG. 3 is a schematic structural diagram of a speaker unit according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

fig. 5 is an exploded view of the sound generator of fig. 4.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Loudspeaker monomer	120	Vibrating diaphragm
110	Ball top	200	Shell body
				111	Sapphire layer	210	Front acoustic cavity
112	Through hole	220	Sound channel

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a dome, which is applied to a loudspeaker.

In an embodiment of the present invention, as shown in fig. 1 to 3, the dome 110 is mounted on a diaphragm 120 of a speaker, wherein the dome 110 includes at least two sapphire layers 111 stacked one on another, one of the two sapphire layers 111 is configured to be bonded to one side of the diaphragm 120, and at least one of the two sapphire layers 111 is provided with a through hole 112.

In the present embodiment, the dome 110 may have a circular, elliptical, rectangular, racetrack shape, etc. shape. The dome 110 may be attached to the diaphragm 120 of the speaker by means of bonding. The dome 110 is required to be rigid and lightweight to better adjust acoustic performance. The sapphire layer 111 is made of single crystal alumina and has a molecular formula of Al₂O₃Formed by combining three oxygen atoms and two aluminum atoms in a covalent bond form, the crystal structure of the sapphire substrate is a hexagonal lattice structure, and the density of the sapphire layer 111 is 3.95-4.1g/cm³Specifically, the sapphire layer 111 is a pure alumina crystal layer (crystal is transparent and colorless), an alumina crystal layer containing titanium ions and iron ions (crystal is blue), an alumina crystal layer containing chromium ions (crystal is red), or an alumina crystal layer containing nickel ions (crystal is yellow), and thus, different sapphire layers 111 can be selected according to the use requirements without affecting the use of the speaker.

The sapphire layer 111 has the advantages of high strength, high hardness, high temperature resistance, stable chemical properties and the like, and can eliminate the interference on the antenna of a terminal such as a 5G mobile phone and the like when being used as a part of a loudspeaker compared with the traditional metal material. The sapphire layer 111 has a low dielectric constant, weak field constraint, a relatively wide bandwidth, and little or no influence on the antenna. While the high modulus of the sapphire layer 111 helps to improve the high frequency performance of the speaker. Due to the characteristics of the sapphire material, the sapphire layer 111 of the dome 110 can be thinner and harder than other metals, so that the quality of the speaker is better.

Practically speaking, two adjacent sapphire layers 111 can be bonded by glue. For example, the connection is made by ultraviolet light curing glue (UV glue), so the connection mode is simple, stable and reliable. It is understood that the sapphire layer 111 is laminated in the thickness direction thereof. The axial direction of the through-hole 112 coincides with the thickness direction of the sapphire layer 111. The number of vias 112 on sapphire layer 111 may be one, two, three, four, five, multiple, etc. When the number of the through holes 112 on the sapphire layer 111 is small, it is preferable to open the through holes 112 at a position near the edge of the sapphire layer 111. Since the diaphragm 120 has a large middle vibration amplitude and a small edge vibration amplitude when vibrating, and the dome 110 is usually attached to the central portion of the diaphragm 120, the through hole 112 is formed near the edge of the sapphire layer 111 in order to reduce the influence of the through hole 112 on the diaphragm 120. The sizes and the numbers of the through holes 112 are inversely proportional, that is, the larger the number of the through holes 112 is, the smaller the size of the through holes 112 is, and the smaller the number of the through holes 112 is, the larger the size of the through holes 112 can be designed, and the sizes of the through holes 112 may be the same or different. The number and size of the through holes 112 can be selected and designed according to actual requirements, and are not particularly limited herein.

The sapphire layer 111 is provided with a through hole 112, and may be perforated by laser perforation, die perforation, or grinding perforation. Specifically, the through hole 112 may have a polygonal shape such as a triangle, a rectangle, etc., a circular shape, an oval shape, a racetrack shape, a linear structure (stripe structure), etc. The plurality of through holes 112 may be identical in shape or different in shape. In general, in order to facilitate processing, the stress of the sapphire layer 111 is reduced so that the shape of the via hole 112 is circular. Through setting up two at least laminated sapphire layers 111, then when only one of them layer sapphire offered the through-hole 112, the sapphire layer 111 of laminating in this layer can cover through-hole 112 above that, and then can shelter from through-hole 112, avoids gas leakage phenomenon. When the through holes 112 are formed in the sapphire layers 111, the through holes 112 in the sapphire layers 111 are arranged in a staggered mode, so that the through holes 112 can be shielded mutually, and the phenomenon of air leakage is avoided.

The dome 110 includes at least two sapphire layers 111 stacked one on another, and at least one of the two sapphire layers 111 is provided with a through hole 112. The sapphire layer 111 has the advantages of high strength, high hardness, high temperature resistance, stable chemical properties and the like, and can eliminate the interference on the antenna of a terminal such as a 5G mobile phone and the like when being used as a part of a loudspeaker compared with the traditional metal material. Meanwhile, the high modulus of the sapphire layer 111 is beneficial to improving the high-frequency performance of the loudspeaker, so that the quality of the loudspeaker is better. And set up at least both sides sapphire layer 111, set up through-hole 112 on one of them sapphire layer 111 at least, can reduce the area density under the condition that does not influence sapphire layer 111 intensity, reduce the vibration quality, improve the sensitivity and the frequency response of vibration subassembly, and then promote speaker acoustic performance and quality.

In an embodiment, referring to fig. 1 to 3, a plurality of through holes 112 are formed on the sapphire layer 111. Through the through holes 112 arranged at intervals on the sapphire layer 111, on one hand, the mass of the whole sapphire layer 111 can be effectively reduced, and the acoustic performance is further improved; on the other hand, the mass distribution on the whole sapphire layer 111 is more uniform, that is, the mass of the whole sapphire layer 111 in each direction is reduced, so that the influence of the dome 110 on the diaphragm 120 in each direction is more uniform, and the acoustic performance of the whole loudspeaker is better. It is preferable to make the plurality of through holes 112 uniformly distributed on the sapphire layer 111, thereby making the quality of the entire speaker better.

Further, as shown in fig. 1 to 3, at least two rows of through holes 112 are formed in the sapphire layer 111, and the at least two rows of through holes 112 are arranged at intervals along the length direction of the dome 110. The dome 110 may be configured in an elongated shape. At least two rows of through holes 112 are formed in the length direction of the sapphire layer 111, so that the mass of the sapphire layer 111 is reduced as far as possible under the condition that the rigidity of the sapphire layer 111 is not influenced, and the mass distribution of the whole sapphire layer 111 is more uniform. The distances between two adjacent rows of through holes 112 may be the same or different, and the distances between two through holes 112 in each row of through holes 112 may be the same or different.

In an embodiment, referring to fig. 1 to 3 again, the dome 110 includes two or more sapphire layers 111 stacked on each other, and the through holes 112 on two adjacent sapphire layers 111 are staggered in the stacking direction. When the sapphire layer 111 is provided with two or more layers, it is preferable that the through-hole 112 is opened on each sapphire layer 111. In this manner, the mass of the entire dome 110 may be reduced. And through utilizing two adjacent sapphire layers 111 to laminate mutually, can shelter from through-hole 112 each other, prevent that dome 110 from appearing the gas leakage phenomenon in the speaker, influencing acoustic performance.

Further, the thickness of the sapphire layer 111 is greater than or equal to 0.02mm, and less than or equal to 0.5 mm. When the thickness of the sapphire layer 111 is less than 0.02mm, the thickness of the sapphire layer 111 is too thin, so that the processing technology is more difficult, and the processing cost is high. When the thickness of the sapphire layer 111 is greater than 0.5mm, the thickness of the sapphire layer 111 is too thick, which wastes material on one hand, and on the other hand, the mass of the sapphire layer 111 is heavy, thereby affecting the acoustic performance of the speaker. By enabling the thickness of the sapphire layer 111 to be larger than or equal to 0.02mm and smaller than or equal to 0.5mm, the rigidity of the sapphire layer 111 meets the requirement and the acoustic quality of the loudspeaker can be optimally improved under the conditions of simple processing technology and low cost.

In one embodiment, the ratio of the area of the via 112 to the area of the sapphire layer 111 is less than or equal to 0.5. Specifically, the ratio of the area of the via hole 112 to the area of the sapphire layer 111 may be 0.1, 0.2, 0.25, 0.3, 0.45, 0.5, or the like. When the ratio of the area of the through hole 112 to the area of the sapphire layer 111 is greater than 0.5, the area of the entire sapphire opening is made too large, which may affect the rigidity of the sapphire layer 111 and thus the acoustic performance of the speaker. By making the ratio of the area of the through hole 112 to the area of the sapphire layer 111 less than or equal to 0.5, the mass of the sapphire layer 111 is reduced as much as possible while the rigidity of the sapphire layer 111 is not affected, so that the entire dome 110 is lighter in mass and has a better effect of improving the acoustic quality of the speaker.

The present invention further provides a speaker unit 100, as shown in fig. 3 and fig. 5, the speaker unit 100 includes a vibration system, the vibration system includes a diaphragm 120 and a dome 110, and the specific structure of the dome 110 refers to the above embodiments, and since the speaker unit 100 adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described herein again.

Wherein, this speaker monomer 100 includes auxiliary system, vibration system and magnetic circuit, and auxiliary system is including being used for acceping fixed vibration system and magnetic circuit's shell, and auxiliary system still includes the magnetic yoke, and the magnetic yoke is fixed in the shell and deviates from one side of vibrating diaphragm 120, and vibration system includes vibrating diaphragm 120, dome 110 and fixes the voice coil loudspeaker voice coil in vibrating diaphragm 120 one side, and magnetic circuit includes magnet, and one side that magnet is close to vibrating diaphragm 120 is provided with the magnetic conduction board. The magnetic circuit system has a magnetic gap, the voice coil is disposed in the magnetic gap, and the voice coil reciprocates up and down in the magnetic field after being supplied with the alternating current, so as to drive the diaphragm 120 to vibrate and sound. In some embodiments, no auxiliary system may be provided. The material of the diaphragm 120 is selected to be a flexible diaphragm 120, which can improve the low frequency performance, and because of its light weight and small motion inertia, the sound clarity and detail processing are very good, the diaphragm 120 may be composed of one or more of polyetherimide, polyurethane, polyvinyl chloride, a polyether-ether-ketone and polyurethane thermal composite film, polyether-ether-ketone, and silica gel, or other high polymer material diaphragms 120 or biological diaphragms 120 may be selected.

Specifically, the diaphragm 120 includes a central portion and a bending portion connected to an outer periphery of the central portion, and the dome 110 is adhered to the central portion. The center of the diaphragm 120 may be provided with a material, that is, the middle of the center of the diaphragm 120 is hollowed out, and only the edge portion is left to be connected with the edge portion, so that the dome 110 is covered and bonded on the edge portion of the center. Sapphire layer 111 may be bonded to the body of diaphragm 120 by glue. Therefore, the mass of the vibration system can be reduced, the overall sensitivity and frequency response are improved, and the acoustic performance of the whole loudspeaker product is further improved. The bending part is a concave or convex structure, and the diaphragm 120 is further provided with a fixing part fixed with the housing at the periphery of the bending part.

As shown in fig. 4 and 5, the sound generating apparatus of the present invention further includes a housing 200 and a speaker unit 100, the speaker unit 100 is accommodated in the housing 200, the dome 110 of the speaker unit 100 and the housing 200 enclose a front sound cavity 210, and the sound generating apparatus further includes a sound outlet channel 220 communicating the front sound cavity 210 with the outside. Since the sound generating device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

The housing 200 may be made of plastic, and the injection molding method is used to directly inject the plastic into a desired shape in a mold, such that the housing 200 has low cost, high efficiency and simple process, and the housing 200 may also be made of other materials, which is not limited in this embodiment. The speaker unit 100 is fixed in the housing, the speaker unit 100 includes a diaphragm 120, the diaphragm 120 separates the cavity of the sound generating device into a front sound cavity 210 and a rear sound cavity, and the front sound cavity 210 is communicated with the outside of the sound generating device through a sound outlet channel 220. The vibrating diaphragm 120 vibrates to drive the air in the front acoustic cavity 210 to vibrate, the sound waves are transmitted to the outside of the acoustic device through the sound outlet channel 220, and the rear acoustic cavity is of a closed structure and is communicated with the outside only through a damping hole.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a dome installs in the vibrating diaphragm of speaker, its characterized in that, dome includes the sapphire layer that at least two-layer looks range upon range of setting, and one of them layer of this two-layer sapphire layer be used for with one side of vibrating diaphragm combines, and the through-hole has been seted up to at least one of this two-layer sapphire layer.

2. The dome of claim 1 wherein a plurality of said through holes are spaced from one another in said sapphire layer.

3. The dome of claim 2 wherein at least two rows of said through holes are provided in said sapphire layer, said at least two rows being spaced apart along the length of said dome.

4. The dome of claim 1 wherein the through-holes are of circular, oval, polygonal, racetrack or linear configuration.

5. The dome of any one of claims 1 to 4, wherein the dome comprises two or more sapphire layers stacked on each other, and the through holes of two adjacent sapphire layers are arranged with being staggered in the stacking direction thereof.

6. The dome of claim 5 wherein two adjacent layers of said sapphire are bonded to each other.

7. The dome of any one of claims 1-4 wherein the sapphire layer has a thickness greater than or equal to 0.02mm and less than or equal to 0.5 mm.

8. The dome of any one of claims 1-4 wherein the ratio of the area of the through hole to the area of the sapphire layer is less than or equal to 0.5.

9. The dome of claim 1 wherein the sapphire layer is a pure alumina crystal layer, an alumina crystal layer containing titanium ions and iron ions, an alumina crystal layer containing chromium ions, or an alumina crystal layer containing nickel ions.

10. A loudspeaker unit comprising a vibration system, the vibration system comprising a diaphragm and a dome as claimed in any one of claims 1 to 9, the dome being mounted to the diaphragm.

11. A sound generating device, comprising a housing and the single speaker unit as claimed in claim 10, wherein the single speaker unit is accommodated in the housing, a dome of the single speaker unit and the housing enclose a front sound cavity, and the sound generating device is further provided with a sound outlet channel for communicating the front sound cavity with the outside.