CN110198513A - A kind of sounding device - Google Patents

Abstract

The present invention provides a kind of sounding devices, including the external shell with accommodating space and it is fixed on the intracorporal phonation unit of accommodating chamber, phonation unit includes vibrating diaphragm, space between the front side and external shell of vibrating diaphragm forms the first cavity, space between the back side and external shell of vibrating diaphragm forms the second cavity, the intracorporal segment space of second chamber is arranged to sound-absorbing cavity, sound-absorbing cavity is surrounded jointly by the breathable barrier for being fixed on the intracorporal support construction of the second chamber and combining with support construction, it is at least partly in open setting on each face of support construction, to assemble the breathable barrier, fill sound-absorbing material in the inside of sound-absorbing cavity.The gas permeability of technical solution of the present invention, sound-absorbing cavity is higher, and can be improved the space utilization rate of the second inside cavity, improves product to a greater extent in the acoustical behavior of low-frequency range.

Description

A kind of sounding device

Technical field

The present invention relates to electro-acoustic product technical field, in particular to a kind of sounding device.

Background technique

Normally, loudspeaker mould group is to obtain better acoustic efficiency, especially for obtaining better low-frequency effect, Generally sound-absorbing particle can be filled in the back cavity inside cavity of mould group.In the prior art, the design filling for sound-absorbing particle part For, main way is that individual filling region is arranged in the inner cavity that module shell is formed, and by hot melt screen cloth or is inserted Sound-absorbing particle and phonation unit is isolated in the mode of net.

However, there is certain drawbacks for this way: on the one hand, the overall air permeability of current this product design is poor. Individual filling region and phonation unit only pass through the connection of the screen cloth among the two, can not form the ventilating return of vibration acoustic, Largely affect the capacity enlargement effect of sound-absorbing particle.This is because the accumulation of particle so that contact phonation unit end at first The abundant dilatation of energy, separate partial particulate do not have the effect of dilatation or even play reaction due to accumulating.It is another Aspect, the acoustical behavior of loudspeaker mould group improve limited.Screen cloth mainly fixed by way of heating or bonding, and this two Kind technique is required to stationary plane and is necessary for plane, so the setting of filling region is largely limited by cavity body structure, Module internal cavity space is difficult to be fully used, and packing volume is too small.

It is, thus, sought for a kind of new solution, improves above-mentioned deficiency in the prior art, meets speaker performance Requirement.

Summary of the invention

The main object of the present invention is to provide a kind of acoustic apparatus, it is intended to it is ventilative to solve sound-absorbing region entirety in the prior art Property difference and be limited to the problem that low frequency improvement is limited caused by cavity body structure.

To achieve the above object, the present invention proposes a kind of acoustic apparatus, including with accommodating space external shell and Be fixed on the intracorporal phonation unit of the accommodating chamber, the phonation unit includes vibrating diaphragm, the front side of the vibrating diaphragm with it is described Space between external shell forms the first cavity, and the space between the back side of the vibrating diaphragm and the external shell forms second Cavity, wherein

The intracorporal segment space of second chamber is arranged to sound-absorbing cavity；The sound-absorbing cavity is by being fixed on described second The intracorporal support construction of chamber and the breathable barrier combined with the support construction surround jointly；The support construction it is every It is at least partly open setting on a face, to assemble the breathable barrier；Fill sound-absorbing in the inside of the sound-absorbing cavity Material.

Preferably, the support construction is metal material.

Preferably, the support construction passes through metal powder injection molding.

Preferably, the support construction is plastic material, integrated injection molding.

Preferably, the support construction is rule/irregular polyhedral structure.

Preferably, the appearance profile of the support construction is the cuboid framework structure of rule, wherein the support construction Six faces are surrounded by support arm, and six faces are in open setting；It is solid respectively there are six the breathable barrier is correspondingly arranged It is scheduled on the support arm for surrounding each face.

Preferably, the fixed part fixed with the support construction is provided on the external shell, the fixed part is corresponding It is arranged in the marginal position of the support construction.

Preferably, the appearance profile of the support construction is the cuboid framework structure of rule, and the fixed part is to correspond to The protrusion of the corner positions setting of the support construction；It is described protrusion with the external shell be integrally formed, and with the branch Support structure is fixed together by gluing or hot melt.

Preferably, the breathable barrier is separate structure, respectively corresponds and is fixed on each face of the support construction； Alternatively, the breathable barrier is integrally formed structures.

Preferably, the breathable barrier is metal mesh, passes through metal powder injection technique one with the support construction Molding；Alternatively, the breathable barrier is nonmetallic net, it is adhesively fixed or is molded with the support construction and combined.

Preferably, the sound-absorbing material is porosity sound-absorbing particle, and the maximum diameter of hole of the mesh of the breathable barrier is small In the minimum grain size of the sound-absorbing particle.

Preferably, outlet sound mouth is provided on the external shell, the air-flow that the diaphragm oscillations generate is in the vibrating diaphragm Front side is via first cavity from the outlet sound mouth to external radiation；Back of the air-flow that the diaphragm oscillations generate in the vibrating diaphragm Side is connected to via the breathable barrier with the sound-absorbing cavity.

Preferably, the outlet sound mouth is set to the position of vibrating diaphragm described in the face of the external shell；Alternatively, described speak The side of the external shell is arranged in mouth.

Preferably, the external shell includes the first shell and second shell mutually assembled together；Alternatively, described outer Portion's shell includes first shell, second shell and the third shell mutually assembled together.

The sounding device of technical solution of the present invention, sound-absorbing cavity by each face at least partly open by design braced frame It surrounds in conjunction with breathable barrier, for the sounding device of the filling sound-absorbing material of the second inside cavity point, can make jointly Each face of sound-absorbing cavity can receive the sound wave of diaphragm oscillations generation, that is, form comprehensively ventilative filling cavity, compare For the prior art, improve the overall air permeability in sound-absorbing region, sound-absorbing material can abundant dilatation, greatly increase The volume of virtual back cavity.

Further, the sounding device of technical solution of the present invention, braced frame can use metal powder injection molding Technique is made, and compared with the prior art, not will receive the limitation of cavity body structure, hot melting process and machining accuracy, can more fill The utilization intracorporal space of the second chamber divided, further improves the frequency acoustic performance of product.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with The structure shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the Structure explosion diagram of one embodiment of acoustic apparatus of the present invention；

Fig. 2 is the diagrammatic cross-section of one embodiment of acoustic apparatus of the present invention；

Fig. 3 is the perspective view of one embodiment of acoustic apparatus of the present invention.

Drawing reference numeral explanation:

1, external shell, 10, outlet sound mouth, the 101, first cavity, the 102, second cavity, 11, first shell, 12, second shell Body, 121, fixed part, 2, phonation unit, 3, support construction, 31, support arm, 4, breathable barrier, 5, vibrating diaphragm.

The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.

It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly.

In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result, Two " feature can explicitly or implicitly include at least one of the features.

The invention proposes a kind of acoustic apparatus comprising has the external shell of accommodating space and is fixed on receipts The intracorporal phonation unit of cavity, phonation unit include vibrating diaphragm, and the space between the front side and external shell of vibrating diaphragm forms the first chamber Body, the space between the back side and external shell of vibrating diaphragm form the second cavity.In order to solve sound-absorbing region entirety in the prior art Gas permeability is inadequate and is limited to module casing structure to improve limited problem, technical solution of the present invention to acoustical behavior In in the intracorporal segment space of the second chamber be arranged to sound-absorbing cavity, sound-absorbing cavity is by being fixed on the intracorporal support construction of the second chamber And the breathable barrier combined with support construction surrounds jointly, at least partly sets in open on each face of support construction It sets, to assemble the breathable barrier, sound-absorbing material is filled in the inside of sound-absorbing cavity.

Embodiment:

As shown in Figure 1, Figure 2 and Fig. 3 is jointly shown, and the sounding device of the present embodiment specifically includes external shell 1, external shell 1 Including mutually assembling first shell 11 and second shell 12 together, after first shell 11 and second shell 12 assemble, formed Cavity is accommodated, phonation unit 2 is fixed in the receiving cavity.Phonation unit 2 further comprises vibrating diaphragm 5, and phonation unit 2 will The cavity that case body 1 is formed is divided into two cavitys, and specifically, space between the front side and external shell 1 of vibrating diaphragm 5 forms the One cavity 101, the i.e. preceding operatic tunes of sounding device, the first cavity 101 are connected to outlet sound mouth 10, the sound wave warp that the vibration of vibrating diaphragm 5 generates The first cavity 101 is crossed outwardly to radiate from outlet sound mouth 10；Space between the back side and external shell 1 of vibrating diaphragm 5 forms second Cavity 102, the second cavity 102 and the first cavity 101 mutually completely cut off, as the rear operatic tunes of sounding device, the second cavity 102 It is the structure of acoustic seal, by diaphragm oscillations within the space that the air-flow that back side generates is enclosed in the second cavity 102, avoids sound Short circuit.

It is arranged to inhale to optimize segment space of the sounding device in the acoustical behavior of low-frequency range, the second cavity 102 Sound cavity increases the intracorporal virtual volume of chamber by sound-absorbing material.In the present embodiment, attracting cavity is specifically by being fixed on second Support construction 3 in cavity 102 and assemble what breathable barrier 4 together surrounded jointly with support construction 3.Wherein, it props up Support structure 3 provides the external frame of sound-absorbing cavity, and breathable barrier 4 is then between main contributions phonation unit and sound-absorbing material It airflow and obstructs sound-absorbing material and escapes to phonation unit 2.In order to enable sound-absorbing material to come into full contact with phonation unit 2, The gas permeability of sound-absorbing cavity entirety is improved, is both configured at least partially open on each face of support construction 3 in the present embodiment Formula setting has at least partly opening to assemble breathable barrier 4, such energy on each different face of support construction The breathable barrier 4 on each face that the air-flow that enough guarantee 5 back side of vibrating diaphragm generates passes through entire sound-absorbing cavity forms a ventilation Circuit is connected to sound-absorbing cavity, compared with the prior art in be only arranged on single side or part face screen cloth way and Speech, so that the sound-absorbing material at nearly phonation unit end and the sound-absorbing material far from phonation unit end can play effective dilatation Effect.

It is an option that support construction 3 can be metal material, it is also possible to plastics or other materials.Preferably It is, when selecting metal material molding, the support construction 3 can be formed by metallic powder injection moulding process (MIM).Wherein, Metallic powder injection moulding process is modern plastics injection molding technology to be introduced field of powder metallurgy and formed one is novel The near net-shaped forming technique of powder metallurgy, basic technical process is: solid powder is uniformly kneaded with organic binder first, After pelletizing under heating plasticizing state (~150 DEG C) with injection machine inject die cavity in solidified forming, then with chemistry or The method of thermal decomposition is removed the binder in base is shaped, and most obtains final products through sintering densification afterwards.The technological forming Product has the complicated shape and high-precision as injection molding of plastics method resulting product, and has the object close with forging It is individual with certain strong region setting can to can be filled at it according to the space structure of rear operatic tunes complexity in reason, chemistry and mechanical performance The metal support structure of degree does not come into contact in a large area, in this way independently of mould group inside cavity with one or more surfaces of inner cavity wall body It can guarantee that most of area of sound-absorbing cavity can be combined with breathable barrier 4.That is, with prior art technology phase Than not will receive the limitation of cavity body structure, hot melting process and machining accuracy using the technique, being easy separately formed in the rear operatic tunes Various support constructions 3 complicated and with high accuracy out, are very helpful to the acoustical behavior for improving loudspeaker mould group low frequency.

Certainly, it if support construction 3 selects plastic material, can also be integrally formed by Shooting Technique.The technique Belong to more traditional technique, details are not described herein.

In the specific implementation, support construction 3 either rule polyhedral structure, be also possible to irregular polyhedron Structure, for shown in the present embodiment, support construction 3 is set as the rectangular parallelepiped structure (i.e. hexahedron) of rule, and entirety is The frame structure collectively constituted by multiple groups support arm 31, comprising in above-below direction, left and right sides to and front and back side direction totally six A different face, and this six faces are in open by design, and six breathable barriers 4 can be set in this way, respectively correspond It is corresponding with support arm 31 to be fixed together on each face of support construction 3.It is easily understood that the number of breathable barrier 4 Amount, size and shape can be adjusted flexibly according to the concrete condition in each face of support construction 3.Except being made of support arm 31 Framework outside six faces can receive the vibration acoustic of phonation unit, comprehensively ventilative sound-absorbing cavity can be formed, to reach To the effect of the abundant dilatation of sound-absorbing material, it can greatly increase the volume of virtual back cavity.

It should be appreciated by those skilled in the art that support construction 3 needs to be fixed in the second cavity 201, i.e., it should be with outside It is connected and fixed between the shell wall of shell 1, in the present embodiment, as depicted in figs. 1 and 2, is provided on external shell 1 and support construction 3 fixed fixed parts 121.Fixed part 121, which can be, to be extended from the inner wall of external shell 1 to the direction of support construction 3 Bulge-structure, which connects support construction 3 and external shell 1.In the specific implementation, bulge-structure can be with It is set as step-like bracket, is also possible to the integrated structure etc. of protrusion extended perpendicular to shell wall inner surface to support construction 3. Above-mentioned protrusion can be integrally formed with external shell 1, and be fixed on by way of gluing or hot melt with support construction 3 Together.It can certainly be seperated individually designed bulge-structure.It can also be the inner wall surface exterior surface from external shell 1 The protrusion (structure for being equivalent to deep gouge) that direction extends, the part that support construction 3 is connected with external shell 1 can directly accommodate In the protrusion.

In addition, in order to guarantee that area as big as possible is ventilative, and firm, the preferred implementation fixed with support construction 3 Scheme is that fixation portions 121 can be symmetricly set on the marginal position of support construction 3, such as Fig. 1, quadrangle shown in Figure 2 position It sets, is actually also possible to be located at two ipsilateral corner positions, basic be fixedly connected also may be implemented.To the technical program For, support construction 3 realizes that fixed concrete mode and position are unrestricted with external shell 1, without in restriction this technology The practical range of scheme.

It is separately formed can to first pass through metallic powder injection moulding process in assembly for the sounding device of present embodiment Support construction 3 out, are all arranged breathable barrier 4 on five faces of support construction 3, then from unbonded breathable barrier 4 that Upper populated sound-absorbing material on one side, after breathable barrier 4 is covered on the face, one independent sound-absorbing cavity of formation in this way. Sound-absorbing cavity is fixed by above-mentioned fixed part 121 and external shell 1.After processing the part, then carry out phonation unit 2 and outer The assembling of portion's shell 1 etc., in this way will not be directly or indirectly filling in the mould group of finished product because of prior art, because sound-absorbing particle is viscous Performance caused by attached, excessive etc. and bad order are scrapped, and production process is simple, can reduce production cost.

It is understood that breathable barrier 4 can be separate structure, that is, correspond to the more of different face setting quantity equities Then a breathable barrier is respectively corresponded and is fixed on each face of support construction 3.But be not limited to that this mode, It can be integrally formed cyclic structure, or be integrally formed the tetrameric cyclic annular ventilative isolation of front and back sides and left and right side Then two breathable barriers of top surface and bottom surface are respectively set in part.

The specific material of breathable barrier 4 can be with flexible choice, for example, breathable barrier 4 can be metal mesh, the metal Net can be integrally formed with support construction 3 by metal powder injection technique.Or breathable barrier 4 is nonmetallic net, example Such as Air Filter, non-woven fabrics, filter paper, Du Pont's paper gas permeability mesh members.When the ventilative isolation for selecting above-mentioned non-metallic material When part, it can be adhesively fixed or be molded with support construction 3 and be combined together.

Sounding device of the invention, the intracorporal sound-absorbing material of sound absorption cavity can be porosity sound-absorbing particle, such as zeolite, nothing The particle of sizing carbon, molecular sieve, fullerene etc..It will be appreciated by persons skilled in the art that due to breathable barrier 4 Therefore the function of carry isolation phonation unit 2 and sound-absorbing particle is distributed in the maximum diameter of hole of the mesh in breathable barrier 4 The minimum grain size of filled sound-absorbing particle should be less than, can guarantee that sound-absorbing particle will not go out escape to sounding list from mesh in this way In member 2.

It should be noted that being the sounding device that side is spoken shown in present embodiment, outlet sound mouth 10 is arranged in outside The side of shell 1 generally minimizes current portable terminal, for the design that is thinned, it is this go out acoustic form sounding Device has wider application.But outlet sound mouth 10 still can be set in the position of the face vibrating diaphragm 5 of external shell 1, It just speaks, nor affects on the realization of technical solution of the present invention.

In addition, the sounding device shown in present embodiment, external shell 1 specifically includes first mutually assembled together Shell 11 and second shell 12, wherein outlet sound mouth 5 and fixed part 121 are arranged in second shell 12, but be embodied when outside The shell of the corresponding installation of the composition of portion's shell, all parts etc. is not limited.For example, external shell 1 can with when by three Housing parts are constituted, including mutually assembling first shell, second shell and third shell together, the specific setting of outlet sound mouth etc. It is well known to those skilled in the art, repeats no more.

Furthermore the sounding device shown in present embodiment, support construction 3 except corner positions connect with fixed part 121 with Outside, remaining main part on six faces that support arm 31 is constituted is in open setting, the available larger promotion of gas permeability. But in the specific implementation, the open area in each different sides of support construction 3 can be uneven, for example considers support construction 3 Strength demand etc., can be extended along the plane in the top surface upper support arm of support construction 3, be formed more relatively small Opening is for assembling the different design scheme of breathable barrier 4 etc., as long as can guarantee can be for vibrating diaphragm on each face The air-flow of back side passes through.

The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly It is included in other related technical areas in scope of patent protection of the invention.

Claims (14)

1. a kind of sounding device including the external shell with accommodating space and is fixed on the intracorporal hair of the accommodating chamber Sound unit, the phonation unit include vibrating diaphragm, and the space between the front side of the vibrating diaphragm and the external shell forms the first chamber Body, the space between the back side of the vibrating diaphragm and the external shell form the second cavity, which is characterized in that

The intracorporal segment space of second chamber is arranged to sound-absorbing cavity；The sound-absorbing cavity is by being fixed on second cavity Interior support construction and the breathable barrier combined with the support construction surround jointly；Each face of the support construction On at least partly be in open setting, to assemble the breathable barrier；Fill sound-absorbing material in the inside of the sound-absorbing cavity.

2. sounding device according to claim 1, which is characterized in that the support construction is metal material.

3. sounding device according to claim 2, which is characterized in that the support construction by metal powder injection at Type.

4. sounding device according to claim 1, which is characterized in that the support construction is plastic material, integrated injection molding Molding.

5. sounding device according to claim 1, which is characterized in that the support construction is rule/irregular multi-panel Body structure.

6. sounding device according to claim 5, which is characterized in that the appearance profile of the support construction is the length of rule Cube frame structure, wherein the support construction surrounds six faces by support arm, and six faces are in open setting；It is described There are six breathable barrier is correspondingly arranged, it is separately fixed on the support arm for surrounding each face.

7. sounding device according to claim 1, which is characterized in that be provided on the external shell and tied with the support The fixed fixed part of structure, the marginal position that the fixed part corresponds to the support construction are arranged.

8. sounding device according to claim 7, which is characterized in that the appearance profile of the support construction is the length of rule Cube frame structure, the fixed part are the protrusion of the corner positions setting of the corresponding support construction；It is described protrusion with it is described External shell is integrally formed, and is fixed together with the support construction by gluing or hot melt.

9. sounding device according to claim 1, which is characterized in that the breathable barrier is separate structure, right respectively It should be fixed on each face of the support construction；

Alternatively, the breathable barrier is integrally formed structures.

10. sounding device according to claim 1, which is characterized in that the breathable barrier is metal mesh, with the branch Support structure is integrally formed by metal powder injection technique；

Alternatively, the breathable barrier is nonmetallic net, it is adhesively fixed or is molded with the support construction and combined.

11. sounding device according to claim 1, which is characterized in that the sound-absorbing material is porosity sound-absorbing particle, institute The maximum diameter of hole for stating the mesh of breathable barrier is less than the minimum grain size of the sound-absorbing particle.

12. -11 described in any item sounding devices according to claim 1, which is characterized in that be provided with out on the external shell Sound mouth, the air-flow that the diaphragm oscillations generate is in the front side of the vibrating diaphragm via first cavity from the outside spoke of the outlet sound mouth It penetrates；The air-flow that the diaphragm oscillations generate connects in the back side of the vibrating diaphragm via the breathable barrier and the sound-absorbing cavity It is logical.

13. sounding device according to claim 12, which is characterized in that the outlet sound mouth is set to the external shell The position of vibrating diaphragm described in face；

Alternatively, the side of the external shell is arranged in the outlet sound mouth.

14. sounding device according to claim 12, which is characterized in that the external shell includes mutually assembling together First shell and second shell；

Alternatively, the external shell includes first shell, second shell and the third shell mutually assembled together.