CN206024095U - A kind of sound-producing device - Google Patents

Abstract

This utility model provides a kind of sound-producing device, and which includes metal plastic part, the metal insert that metal plastic part is included plastic parts and combined with plastic parts；Having on the surface of metal insert and the oxidation film layer and the nano-pore positioned at the surface of oxidation film layer for obtaining being processed by metal nanoization, the aperture of nano-pore is 20nm 1000nm；The resin combination for forming plastic parts is filled in nano-pore.This utility model forms the resin combination of plastic parts and is filled in the nano-pore, reaches the purpose that metal insert and plastic parts are brought into close contact, and be conducive to greatly strengthening metal insert grabs glue ability, prevents metal insert from separating with after plastic parts injection molded；The length of the embedded plastic parts of metal insert is greatly reduced so that ultrasonic energy transmission is smooth, effectively prevents the insoluble problem of metal plastic part ultrasound, so as to improve the water resistance and sealing property of metal plastic part, to improve the performance of sound-producing device.

Description

A kind of sound-producing device

Technical field

This utility model is related to acoustic product field, more particularly, to a kind of sound-producing device.

Background technology

With the progress of science and technology, the requirement of the electronic product to performances such as waterproof, sealings such as mobile phone, computer, TV is more next Higher, how to improve the waterproof of electronic product, sealing property has become a very important part in design of electronic products.

By taking commonly used microphone device speaker in electronic product as an example, speaker common at present mainly has moving-coil type to raise Sound device, electromagnetic loudspeaker, condenser loudspeaker, piezo-electric loudspeaker etc., coil-moving speaker therein make phase because having To simple, with low cost, have preferable low frequency sounding advantage the features such as.Existing coil-moving speaker is also called moving-coil type and raises one's voice Device module, its generally include speaker module casing and loudspeaker monomer, and wherein speaker module casing includes upper casing and lower casing, Upper casing and lower casing are together form for housing the cavity of loudspeaker monomer.

In order to improve the intensity of speaker module casing, reduce the thickness of speaker module, speaker module casing upper Shell and/or lower casing position corresponding with loudspeaker monomer are typically provided with metal insert, and metal insert is defined with plastic parts injection The upper casing and/or lower casing of speaker module casing.As the material difference between metal insert and plastic parts is big, adhesion is low, After both injection coolings, plastic parts is easily separated with metal insert by cold events, the part that plastic parts is contacted with metal insert, from And gap is formed between metal insert and plastic parts, these gaps will deteriorate the water resistance and sealing of speaker module Energy.

And, in order to improve the adhesion between metal insert and plastic parts, avoid as far as possible metal insert and plastic parts it Between form gap, it will usually increase the length of the embedded plastic parts of metal insert, and the upper casing and lower casing of speaker module casing be logical When crossing ultrasonic sealing (being also called ultrasonic bonding) mode and combining, the length of the embedded plastic parts of larger metal insert will affect The transmission of ultrasonic energy, nearby ultrasound does not melt to cause metal insert, causes the water resistance and sealing property of speaker module big Width declines.

Utility model content

A purpose of the present utility model is to provide a kind of new solution of sound-producing device, to improve metal insert and modeling Adhesion between glue part, prevents metal plastic part ultrasound from not melting.

According to first aspect of the present utility model, there is provided a kind of sound-producing device, including metal plastic part, the metal modeling The metal insert that glue part is included plastic parts and combined with the plastic parts；Have on the surface of the metal insert and received by metal Oxidation film layer and the nano-pore positioned at the surface of the oxidation film layer that riceization process is obtained, the aperture of the nano-pore is 20nm-1000nm；The resin combination for forming the plastic parts is filled in the nano-pore.

Alternatively, the sound-producing device includes that speaker module, the speaker module are included by upper casing, middle shell and bonnet The speaker module casing of cavity volume is snapped together and is formed, the upper casing is made up of the metal plastic part.

Alternatively, the sound-producing device includes that speaker module, the speaker module include being fastened by upper casing and lower casing Together and the speaker module casing of cavity volume is formed, the upper casing and/or lower casing are made up of the metal plastic part.

Alternatively, the sound-producing device includes loudspeaker monomer, and the loudspeaker monomer includes vibrational system, magnetic circuit system And for housing the aid system of the vibrational system and the magnetic system, the aid system is by the metal plastic part structure Into.

Alternatively, the shell that the aid system is included protecgulum and is engaged with the protecgulum, wherein, the protecgulum and/ Or the shell is made up of the metal plastic part.

Alternatively, the aperture of the nano-pore is 20nm-100nm, and the depth of the nano-pore is 1 μm -8 μm.

Alternatively, the metal insert is 0.1mm-0.3mm with the length of the plastic parts bound fraction.

Alternatively, the metal insert is 0.2mm with the length of the plastic parts bound fraction.

Alternatively, the part combined with the plastic parts by the metal insert be plate-like structure, and the tabular knot One end face of structure is not wrapped up by the plastic parts.

Alternatively, the bottom of each nano-pore communicates with each other.

Alternatively, the inwall of the nano-pore has rough surface.

Alternatively, the resin combination is one or more in PPS, PBT, PA6 and PA66.

Alternatively, the metal insert is aluminum, aluminium alloy, steel or stainless steel material.

Inventor of the present utility model has found, in the prior art, exists because between metal insert and plastic parts really The problem in gap, and the length because of the embedded plastic parts of metal insert is formed between the low caused metal insert of adhesion and plastic parts Spend larger caused metal insert ultrasonic insoluble problem nearby.Therefore, this utility model technical assignment to be realized or Technical problem to be solved be that those skilled in the art never expect or it is not expected that, therefore this utility model is one Plant new technical scheme.

A beneficial effect of the present utility model is that the oxidation film layer surface of metal insert has 20nm-1000nm's Nano-pore, the resin combination for forming plastic parts are filled in the nano-pore, reach what metal insert and plastic parts were brought into close contact Purpose, is conducive to the adhesion that grabs glue ability, improve between metal insert and plastic parts for greatly strengthening metal insert, prevents Metal insert is separated with after plastic parts injection molded；And, after the adhesion between metal insert and plastic parts is improved, metal is embedding The length of the embedded plastic parts of part can be greatly reduced so that ultrasonic energy transmission is smooth, effectively prevent metal plastic part ultrasound from not melting Problem, so as to improve the water resistance and sealing property of metal plastic part, to improve the performance of sound-producing device.

By detailed description referring to the drawings to exemplary embodiment of the present utility model, of the present utility model other Feature and its advantage will be made apparent from.

Description of the drawings

Combined in the description and the accompanying drawing of the part that constitutes description shows embodiment of the present utility model, and And illustrate to be used for explaining principle of the present utility model together with which.

Cut-away views of the Fig. 1 for the first embodiment of this utility model sound-producing device；

Fig. 2 is the enlarged drawing in Fig. 1 at A；

Fig. 3 is the enlarged drawing in Fig. 2 at B；

Fig. 4 is the explosive view of part-structure in Fig. 1；

Explosive views of the Fig. 5 for the part-structure of the second embodiment of this utility model sound-producing device；

Explosive views of the Fig. 6 for the 3rd embodiment of this utility model sound-producing device；

Partial, detailed views of the Fig. 7 for the fourth embodiment of this utility model sound-producing device；

Flow charts of the Fig. 8 for the preparation method of this utility model metal plastic part；

Fig. 9 is not for carrying out the metal insert of oxidation processes in the preparation method embodiment 1 of this utility model metal plastic part The SEM figures on surface；

Figure 10 is the metal insert surface after oxidation processes in the preparation method embodiment 1 of this utility model metal plastic part SEM figure；

Figure 11 is the metal insert surface after expanding treatment in the preparation method embodiment 1 of this utility model metal plastic part SEM figure.

Indicate in figure as follows：

Speaker module -1, upper casing -11, plastic parts -111, metal insert -112, oxidation film layer -1121, nano-pore - 1122, middle shell -12, bonnet -13, lower casing -14, loudspeaker monomer -2, vibrational system -21, magnetic circuit system -22, protecgulum -23, outward Shell -24.

Specific embodiment

Describe various exemplary embodiments of the present utility model now with reference to accompanying drawing in detail.It should be noted that：Unless another Illustrate outward, the part and the positioned opposite of step, numerical expression and numerical value for otherwise illustrating in these embodiments is not limited Make scope of the present utility model.

It is illustrative below to the description only actually of at least one exemplary embodiment, never as to this practicality New and its application or any restriction for using.

For known to person of ordinary skill in the relevant, technology, method and apparatus may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered a part for description.

In all examples of shown here and discussion, any occurrence should be construed as merely exemplary, and not It is as restriction.Therefore, other examples of exemplary embodiment can have different values.

It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then which need not be further discussed in subsequent accompanying drawing.

In order to solve because of shape between the low caused metal insert of the adhesion between metal insert and plastic parts and plastic parts Into the problem in gap, and ask because near the larger caused metal insert of the length of the embedded plastic parts of metal insert, ultrasound is insoluble Topic, this utility model provide a kind of sound-producing device, and as shown in Figures 1 to 7, including metal plastic part, above-mentioned sound-producing device is The device of sound, such as speaker module or loudspeaker monomer etc. can be sent, when sound-producing device includes speaker module, is raised The speaker module casing of sound device module can be made up of metal plastic part, or when sound-producing device includes to work independently and sending During the loudspeaker monomer of sound, the frame of loudspeaker monomer can be made up of metal plastic part, so, in sound-producing device by metal and All parts that plastic cement is combined into can be made up of metal plastic part；The metal plastic part include plastic parts 111 and with institute The metal insert 112 of the combination of plastic parts 111 is stated, above-mentioned plastic parts 111 is formed by resin combination, and plastic parts 111 is embedding with metal The mode that part 112 is combined is optionally injection, it is to be understood that can make metal and plastics or plastic cement integration Molding mode is used equally to utility model, it is not limited to the mode of injection mo(u)lding；Have on the surface of the metal insert 112 The oxidation film layer 1121 obtained by metal nanoization process and the nano-pore positioned at the surface of the oxidation film layer 1121 1122, the aperture of the nano-pore 1122 is 20nm-1000nm, the oxidation film layer 1121 on the surface of above-mentioned metal insert 112 The part combined with plastic parts 111 by metal insert 112 can be only located at, or the whole surface of metal insert 112 is respectively provided with oxidation Film layer 1121, the whole surface whether oxidation film layer 1121 will cover metal insert 112 can be selected according to the actual requirements, this practicality New this is not further limited；Above-mentioned metal nanoization process is referred to and carries out metal material table to metal insert 112 The process of face nanorize, specifically, making Nano surface of metal material can be surface self-nanocrystallinzation, coating or deposition surface nanorize With mixing nanorize, table of this utility model preferably by its own face formation in metal insert 112 with nanostructured Surface layer (i.e. oxidation film layer 1121) carries out metal nano process to metal insert 112, this metal nano processing mode Without obvious interface between nanostructured surface laye and matrix, 1122 unique structure of nano-pore that obtains, pore-size distribution more collect In, inventor also compares by way of laser boring the surface of metal insert 112 obtain 40 μm -50 μm micropore, with And the knot between the micropore of 0.3mm-0.4mm and resin combination is obtained on the surface of metal insert 112 by way of punching press Close, it is found that aperture of the present utility model is good for the combination effect between the nano-pore 1122 and resin combination of 20nm-1000nm, Aperture for 20nm-1000nm nano-pore 1122 due to aperture less and tightness degree that combined with resin combination is higher, i.e., Resin combination grabs that glue ability is strong, thus the stability that plastic parts 111 and metal insert 112 are combined is higher；Additionally, oxide-film The particular type of layer 1121 can determine that such as oxidation film layer 1121 can be metal insert in electrolytic process according to the actual requirements 112 used as the anode oxidation membrane formed on surface during anode, or the self-assembling formation under air conditionses of metal insert 112 Oxidation film layer, has nano-pore 1122 as long as can pass through metal nanoization and process to be formed on the surface of oxidation film layer 112 Oxidation film layer 1121；The resin combination for forming the plastic parts 111 is filled in the nano-pore 1122, above-mentioned resin The process of compositionss filling nano-pore 1122 is preferably by injection and realizes, the condition of High Temperature High Pressure and high speed impact during injection In being conducive to resin combination more abundant and promptly filling to nano-pore 1122, so as to being conducive to increasing resin combination and receiving Adhesion between metre hole 1122.

1121 surface of oxidation film layer of metal insert of the present utility model 112 has the nano-pore 1122 of 20nm-1000nm, The resin combination for forming plastic parts 111 is filled in the nano-pore 1122, reaches metal insert 112 tight with plastic parts 111 The purpose of laminating, be conducive to greatly strengthening metal insert 112 grab glue ability, improve metal insert 112 and plastic parts 111 it Between adhesion, prevent metal insert 112 from separating with after 111 injection molded of plastic parts, it is to avoid in metal insert 112 and plastic parts Gap is formed between 111；And, after the adhesion between metal insert 112 and plastic parts 111 is improved, metal insert 112 is embedded in The length of plastic parts 111 can be greatly reduced so that ultrasonic energy transmission is smooth, effectively prevent metal plastic part ultrasound from insoluble asking Topic, so as to improve the water resistance and sealing property of metal plastic part, to improve the performance of sound-producing device.

In a specific embodiment of the present utility model, as shown in Figures 1 to 4, the sound-producing device includes speaker Module 1, the speaker module 1 include that upper casing 11, middle shell 12 and bonnet 13 are snapped together and form the speaker mould of cavity volume Housing is organized, the combination between above-mentioned upper casing 11 and middle shell 12 can be realized by way of being, for example, ultrasonic sealing, above-mentioned middle shell 12 And the combination between bonnet 13 can be by being, for example, that gluing mode is realized, above-mentioned bonnet 13 may preferably be metal back cover, this Art personnel are it should be clear that being accommodated with loudspeaker monomer and forming speaker module 1 in the cavity volume of speaker module casing The front operatic tunes and the rear operatic tunes, loudspeaker monomer includes that vibrational system and magnetic circuit system, above-mentioned vibrational system include vibrating diaphragm and fixation In the vibrating voice coil of vibrating diaphragm side, vibrating diaphragm includes vibrating diaphragm body again and is fixed on the DOME (top domes of vibrating diaphragm body central position Portion), vibrating diaphragm body includes the ring portion of the concave or convex structure that fixed part and fixed part are wholely set and putting down in ring portion Face, above-mentioned magnetic circuit system include frame, the Magnet being fixed in frame and washer；The upper casing 11 is by the metal plastic part 112 are constituted, it is preferable that the metal insert 112 for constituting upper casing 11 is corresponding with loudspeaker monomer, and, according to tying to speaker Structure and the actual demand of performance, the metal insert 112 and loudspeaker monomer for constituting upper casing 11 are not the upper casing 11 just to arranging yet In metal insert 112 be conducive to improve speaker module casing rigidity, so as to reduce the thickness of speaker module, surpassed Thin speaker.In a specific practical application, the upper casing 11 of speaker module 1 is by 112 structure of plastic parts 111 and metal insert Into that is, upper casing 11 is combined into by plastic cement and metal, the generally plastic cement material of middle shell 12.

In another specific embodiment of the present utility model, as shown in figure 5, the sound-producing device includes speaker module 1, the speaker module 1 includes the speaker module casing for being snapped together and formed by upper casing 11 and lower casing 14 cavity volume, on State the combination between upper casing 11 and lower casing 14 and can realize by way of being, for example, ultrasonic sealing that those skilled in the art should be clear Chu, is accommodated with loudspeaker monomer and forms the front operatic tunes and the rear operatic tunes of speaker module 1, raise in the cavity volume of speaker module casing Sound device monomer includes that vibrational system and magnetic circuit system, above-mentioned vibrational system include vibrating diaphragm and be fixed on the vebrato of vibrating diaphragm side Circle, vibrating diaphragm includes vibrating diaphragm body again and is fixed on the DOME (top dome portion) of vibrating diaphragm body central position, and vibrating diaphragm body includes fixing The ring portion of the concave or convex structure that portion and fixed part are wholely set and the planar portions in ring portion, above-mentioned magnetic circuit system bag Include frame, the Magnet being fixed in frame and washer；The upper casing 11 and/or lower casing 14 are made up of the metal plastic part, i.e., Upper casing 11 is made up of metal plastic part, or lower casing 14 is made up of metal plastic part, or upper casing 11 and lower casing 14 are by metal plastic Part is constituted, it is preferable that the metal insert for constituting upper casing 11 and/or the metal insert for constituting lower casing 14 are relative with loudspeaker monomer Should, and, according to the actual demand to loadspeaker structure and performance, constitute upper casing 11 and/or constitute the metal insert of lower casing with Loudspeaker monomer is not that the metal insert in upper casing 11 and/or lower casing 12 is conducive to improving speaker module just to arranging yet The rigidity of housing, so as to reduce the thickness of speaker module, obtains ultrathin loudspeaker.In a concrete practical application, raise one's voice The upper casing 11 of device module 1 is made up of plastic parts 111 and metal insert 112, i.e., upper casing 11 is combined into by plastic cement and metal, lower casing 14 generally plastic cement materials.

In another specific embodiment of the present utility model, as shown in fig. 6, the sound-producing device includes loudspeaker monomer 2, the loudspeaker monomer 2 includes vibrational system 21, magnetic circuit system 22 and is used for housing the vibrational system 21 and the magnetic The aid system of system 22, the aid system are made up of the metal plastic part, and aid system has been made up of metal plastic part Beneficial to the rigidity for improving loudspeaker monomer 2, so as to reduce the thickness of loudspeaker monomer, ultrathin loudspeaker monomer, this area is obtained It should be clear that above-mentioned vibrational system includes vibrating diaphragm and is fixed on the vibrating voice coil of vibrating diaphragm side, vibrating diaphragm is again including shaking for technical staff Membrane body and the DOME (top dome portion) of vibrating diaphragm body central position is fixed on, vibrating diaphragm body includes fixed part and fixed part one The ring portion of the concave or convex structure of setting and the planar portions in ring portion, above-mentioned magnetic circuit system include frame, are fixed on basin Magnet and washer on frame.Further, the shell 24 that the aid system is included protecgulum 23 and is engaged with the protecgulum 23, Wherein, the protecgulum 23 and/or the shell 24 are made up of the metal plastic part, it will be apparent to those skilled in the art that on State to be usually provided with protecgulum 23 and go out acoustic aperture for sound outgoing, above-mentioned shell 24 is coordinated with protecgulum 23, to house fixed vibration System 21 and magnetic circuit system 22, during being embodied as, constitute the metal insert and plastic parts of protecgulum 23 or shell 24 Position relationship can be selected according to the actual requirements, and for example, the metal insert for constituting protecgulum 23 can be located at the plastic parts for constituting protecgulum 23 Centre position, and for example, the metal insert for constituting shell 24 can be located at the corner location of the plastic parts for constituting shell 24.

In order to improve the adhesion between nano-pore 1122 and resin combination, the aperture of the nano-pore 1122 is 20nm-100nm, the depth of the nano-pore 1122 are 1 μm -8 μm, further, the depth of nano-pore 1122 be 1 μm -4 μm or 3μm-8μm.

Alternatively, the metal insert 112 is 0.1mm-0.3mm with length L of 111 bound fraction of the plastic parts, enters One step ground, the preferred value of length L is 0.2mm, and above-mentioned length L is referred to metal insert 112 with 111 bound fraction of plastic parts in gold The length of the projection in plane that the burnishing surface of category inserts 112 is located.Utility model people of the present utility model has found, without metal Nanorize process, surface do not have oxidation film layer and metal insert and plastic parts on the nano-pore on the surface of oxidation film layer The length of bound fraction is at least 0.4mm, even up to 0.7mm, and, even if having reached 0.7mm, gold can not be completely secured Do not separate between category inserts and plastic parts, and there is oxidation film layer 1121 through metal nano process, surface in this utility model And the length of the metal insert 112 and 111 bound fraction of plastic parts on the nano-pore 1122 on the surface of oxidation film layer 1121 Degree can as little as 0.1mm, combine length be 0.1mm under conditions of, can also ensure have between metal insert 112 and plastic parts 111 There is outstanding adhesion, so as to be greatly reduced the length of the embedded plastic parts of metal insert, it is ensured that sound-producing device ultrasound is close The effect of envelope.

As shown in fig. 7, this utility model additionally provides the fourth embodiment of sound-producing device, and in this embodiment, the gold The part combined with the plastic parts 111 by category inserts 112 is plate-like structure, and an end face of the plate-like structure is not by institute State plastic parts 111 to wrap up, compared to the part combined with plastic parts 111 by metal insert 112 in this utility model first embodiment The curved-surface structure having, the plate-like structure in the embodiment reduce the combination difficulty of metal insert 112 and plastic parts 111, Be conducive to the preparation for simplifying sound-producing device, and under the conditions of the length of the embedded plastic parts of metal insert is less so that ultrasound In seal process, ultrasonic energy transmission is more smooth.By taking speaker module as an example, an end face of above-mentioned plate-like structure not by Plastic parts 11 parcel refer to plate-like structure away from loudspeaker monomer, an end face on length direction be not wrapped in modeling In glue part 111, but contact with the external world so that row metal can be entered to the face of the combination of metal insert 112 and plastic parts 111 only Nanorize process, certainly, also can carry out metal nano process to the entirety of metal insert 112.Further, concrete at one Embodiment in, as the presence of nano-pore 1122 causes the length that metal insert 112 is embedded in plastic parts 111 to greatly reduce, gold Category inserts 112 can be one flat plate, i.e., its remaining part of the part combined with plastic parts 111 by metal insert 112 and metal insert 112 Divide straight transitions, without being specifically designed the part combined with plastic parts 111 on metal insert 112, embedding so as to simplify metal The structure of part 112, and simplify the combination difficulty of metal insert 112 and plastic parts 111.

Before filling to nano-pore 1122 due to resin combination, in nano-pore 1122, include air, if nano-pore Air in 1122 cannot be completely exhausted out in filling, will form cavity, greatly between metal insert 112 and plastic parts 111 Ground reduces the adhesion between metal insert 112 and plastic parts 111, in order to ensure that the air in nano-pore 1122 is fully arranged Go out, the bottom of each nano-pore 1122 communicates with each other, i.e., multiple nano-pores 1122 are located on the surface of oxidation film layer 1121 Opening is separated, while the bottom that multiple nano-pores 1122 are located in oxidation film layer 1121 communicates with each other, so as in oxide-film Define, in layer 1121, the cavernous structure for connecting multiple nano-pore bottoms, this cavernous structure in oxidation film layer 1121 can Contact area between increase metal insert 112 and plastic parts 111, so as to increase between metal insert 112 and plastic parts 111 Adhesion；Additionally, above-mentioned cavernous structure in oxidation film layer 1121 is not necessarily by the bottom of all of nano-pore 1122 Connection, but multiple cavernous structures that the bottom of several nano-pores 1122 can be connected can be formed in oxidation film layer 1121, Alternatively, above-mentioned cavernous structure can have the aperture of 20nm-1000nm.

Alternatively, there is the inwall of the nano-pore 1122 rough surface, above-mentioned rough surface can pass through The structures such as concave or convex are formed on the inwall of nano-pore 1122 realizes for example, as shown in Figure 3, having on the inwall of nano-pore 1122 The rough nano-pore 1122 for having the groove of at least one sharp edges, this inwall can greatly improve metal insert Adhesion between 112 and plastic parts 111.

Alternatively, the resin combination is that PPS (polyphenylene sulfide), PBT (polybutylene terephthalate (PBT)), PA6 are (poly- Amide is 6) with one or more, i.e. plastic parts 111 in PA66 (polyamide 66) by PPS (polyphenylene sulfide), PBT (poly- terephthaldehydes Sour butanediol ester), one or more formation in PA6 (polyamide 6) and PA66 (polyamide 66).

Alternatively, the metal insert 112 is aluminum, aluminium alloy, steel or stainless steel material, further, metal insert 112 For aluminum or aluminum alloy, aluminum or aluminum alloy not only light weight, and with higher intensity, by using aluminum or aluminum alloy as sun Pole, 1121 thickness of oxidation film layer formed on aluminum or aluminum alloy by the way of electrolysis are uniform, 1122 hole of nano-pore for obtaining Footpath distribution is concentrated.

The invention also discloses a kind of preparation method of metal plastic part, as shown in figure 8, comprising the steps：

Step (1)：Oxidation processes are carried out to the surface of the metal insert through pre-treatment, the gold with oxidation film layer is obtained Category inserts, and the surface of oxidation film layer has the pre- hole of nanometer of the aperture less than 10nm, the material of metal insert can be in this area Conventional metal material, such as aluminum or aluminum alloy or steel or stainless steel etc., it is therefore preferable to aluminum or aluminum alloy；Above-mentioned pre-treatment is referred to By the operation of the Impurity removals such as the foreign body of metal material surface, greasy dirt and natural oxide layer, the pre-treatment in this utility model can For the pretreatment procedure carried out by metal material surface that those skilled in the art commonly use, generally comprising carries out mechanical grinding or grinds Grind off except the obvious foreign body in surface, defat, cleaning are carried out to processing oil that metal surface adheres to etc. then, it is preferable that pre-treatment Including first polishing to metal insert surface, then cleaned in ultrasound wave with the various solvents that those skilled in the art commonly use The metal insert, removes the greasy dirt of metal-back body surface, then metal insert is placed in acid/base aqueous solution, ultrasound wave Under the conditions of wash metal insert surface；The oxidation processes on above-mentioned metal insert surface can be realized by anodised mode, The anodizing technology that the anodic oxidation can be known to the skilled person, on the surface of metal insert, oxidized part can The part combined with plastic parts by metal insert is only located at, or the whole surface of metal insert carries out oxidation processes, oxidized The pre- hole of nanometer of small-bore is distributed with the oxidation film layer of the metal insert after process；

Step (2)：Expanding treatment is carried out to the pre- hole of nanometer in the step (1), it is 20nm- to obtain with aperture The metal insert of the nano-pore of 1000nm, above-mentioned expanding treatment are referred to pre- for nanometer hole using various means known in the art Aperture is enlarged, and for example, carries out reaming using expanding agent to the pre- hole of nanometer, it is preferable that the bottom of each nano-pore through reaming at Communicate with each other after reason, i.e., the cavernous structure for connecting multiple nano-pore bottoms is defined in oxidation film layer, above-mentioned in oxidation film layer In cavernous structure not necessarily by all of nano-pore bottom connect, but can be formed in oxidation film layer multiple will The cavernous structure of the bottom connection of several nano-pores, alternatively, above-mentioned cavernous structure can have the aperture of 20nm-1000nm；

Step (3)：The metal insert through metal nanoization process in the step (2) is combined with resin combination To metal plastic part together, that is, is obtained, above-mentioned metal insert is optionally injection with the mode that resin combination is combined, It is understood that metal and plastics or the molding mode of plastic cement integration can be made to be used equally to this utility model, not office It is limited to the mode of injection mo(u)lding, above-mentioned resin combination is the such as speaker module casing that can be used for making sound-producing device Various resin combinations, this utility model do not have special restriction, can be selected according to actual needs, for example, can be thermoplasticity Resin combination, and for example, be PPS (polyphenylene sulfide), PBT (polybutylene terephthalate (PBT)), PA6 (polyamide 6) and One or more in PA66 (polyamide 66).

Those skilled in the art can be readily apparent that method according to disclosed in this utility model can after preparing metal plastic part Other parts groups of metal plastic part with sound-producing device are combined together, so as to obtain complete sound-producing device.

The preparation method of metal plastic part disclosed in this utility model, should by first forming oxidation film layer on metal insert Oxidation film layer has the pre- hole of nanometer of the aperture less than 10nm, then carries out expanding treatment, the letter of the method step to the pre- hole of nanometer Single, it is easy to implement, favorable reproducibility, not only expand the aperture in the pre- hole of nanometer, and the unique structure of nano-pore, improve metal Adhesion between inserts and plastic parts, big with the contact surface of nano-pore after resin combination entrance nano-pore, can be by nano-pore In air fully discharge, reach the purpose that metal insert and plastic parts are brought into close contact, be conducive to greatly strengthening metal insert The adhesion that grabs glue ability, improve between metal insert and plastic parts, prevent after metal insert and plastic parts injection molded point From；And, after the adhesion between metal insert and plastic parts is improved, the length of the embedded plastic parts of metal insert can subtract significantly Little so that ultrasonic energy transmission is smooth, the insoluble problem of metal plastic part ultrasound is effectively prevented, so as to obtain metal insert and modeling Glue part is not readily separated, and is not likely to produce the metal plastic part that ultrasound does not melt problem, improves water resistance and the sealing of metal plastic part Performance.

Alternatively, the oxidation processes in step (1) are anodized, specific as follows：

Metal insert is placed in acidic electrolysis bath as anode, temperature is under the conditions of 15 DEG C of -25 DEG C of voltages are 20V-80V Electrolysis obtains the metal insert of the pre- hole of nanometer with aperture less than 10nm and oxide layer that thickness is 5 μm -30 μm, by anode The oxidation film layer thickness that oxidation processes are obtained is uniform, and the adhesion between oxidation film layer and matrix is strong, and the pre- pore size distribution of nanometer is uniform, Aperture is concentrated, and especially, when metal insert is aluminum or aluminum alloy, acidic electrolysis bath can be sulphuric acid, chromic acid or oxalic acid etc., obtain The depth in the pre- hole of nanometer be 1 μm -2 μm.

In order to more easily carry out expanding treatment to the pre- hole of nanometer, the expanding treatment in step (2) is soaked for expanding agent Bubble process, alternatively, above-mentioned expanding agent can be ammonium hydrogen carbonate.

More specifically, step (2) are specific as follows：

By the metal insert in the step (1) with the pre- hole of nanometer in the ammonium hydrogen carbonate that mass fraction is 13%-20% Immersion a period of time in solution, it is 20nm-1000nm to obtain with aperture, and depth is the metal insert of 1 μm -8 μm of nano-pore, The bottom of the nano-pore obtained by this reaming mode is communicated with each other, and the size uniform of nano-pore, and metal insert is in carbon The time that soaks in sour hydrogen ammonium salt solution is preferably 120min, it is preferable that the aperture of nano-pore is 20nm-100nm, nano-pore Depth is 1 μm -4 μm or 3 μm -8 μm.

Further, in order to improve the distribution of nano-pore and the uniformity coefficient of size, also by metal insert in mass fraction For in the polyacrylamide solution of 10%-20% immersion a period of time, metal insert soak in polyacrylamide solution when Between be preferably 4h, the step preferably can be carried out after metal insert in ammonium bicarbonate soln soaks and clean.

Alternatively, in step (1) have oxidation film layer metal insert and the step (2) in through metal nano Changing the metal insert for processing also carries out cleaning treatment, and above-mentioned cleaning treatment refers to the electrolyte or expansion that will be remained on metal insert Hole agent solution is cleaned up, the matting that the cleaning treatment in this utility model can be commonly used for those skilled in the art, for example Ultrasound wave or hydro-thermal method metal insert can be cleaned used in the deionized water of heating or the cleaning solution such as ethanol, above-mentioned plus The temperature of heat can be 140 DEG C.

Preparation method of the present utility model is described in further detail below by specific embodiment.

Embodiment 1

The metal insert of the aluminium material through pre-treatment is placed in mass fraction for the sulphuric acid of 10%-20% as anode In electrolyte, temperature is that 15 DEG C of -25 DEG C of voltages obtain the receiving less than 10nm with aperture for being electrolysed 50min under the conditions of 20V-80V The pre- hole of rice and the metal insert of oxide layer that thickness is 5 μm -30 μm；By the metal insert with the pre- hole of nanometer in mass fraction it is 120min is soaked in the ammonium bicarbonate soln of 13%-20%, it is 20nm-1000nm to obtain with aperture, and depth is 1 μm -8 μm The metal insert of nano-pore；Metal insert with nano-pore is placed in mould, then resin-bonded thing is injected in mould Combine with metal insert, that is, obtain metal plastic part.

Fig. 9 is the SEM figures on the metal insert surface for not carrying out oxidation processes in embodiment 1, and Figure 10 is to aoxidize in embodiment 1 The SEM figures on the metal insert surface after process, Figure 11 are the SEM figures on the metal insert surface in embodiment 1 after expanding treatment.By Fig. 9 to Figure 11 can be seen that the surface of the metal insert of not oxidised process and only have pit, oxidation-treated metal insert Surface there is the pre- hole of equally distributed undersized nanometer, through expanding treatment after the surface of metal insert there is distribution Even, the more consistent nano-pore of pore size.

Although some specific embodiments of the present utility model are described in detail by example, this area It is to be understood by the skilled artisans that example above is merely to illustrate, rather than in order to limit scope of the present utility model.This Field it is to be understood by the skilled artisans that can be in the case of without departing from scope and spirit of the present utility model, to above example Modify.Scope of the present utility model is defined by the following claims.

Claims (13)

1. a kind of sound-producing device, it is characterised in that including metal plastic part, the metal plastic part include plastic parts and with described The metal insert that plastic parts is combined；Have on the surface of the metal insert and the oxidation film layer for obtaining is processed by metal nanoization And the nano-pore positioned at the surface of the oxidation film layer, the aperture of the nano-pore is 20nm-1000nm；Form the plastic cement The resin combination of part is filled in the nano-pore.

2. sound-producing device according to claim 1, it is characterised in that the sound-producing device also includes speaker module, institute State the speaker module casing that speaker module includes being snapped together and formed by upper casing, middle shell and bonnet cavity volume, described on Shell is made up of the metal plastic part.

3. sound-producing device according to claim 1, it is characterised in that the sound-producing device also includes speaker module, institute State the speaker module casing that speaker module includes being snapped together and formed by upper casing and lower casing cavity volume, the upper casing and/ Or lower casing is made up of the metal plastic part.

4. sound-producing device according to claim 1, it is characterised in that the sound-producing device also includes loudspeaker monomer, institute Stating loudspeaker monomer includes vibrational system, magnetic circuit system and the auxiliary for housing the vibrational system and the magnetic circuit system System, the aid system are made up of the metal plastic part.

5. sound-producing device according to claim 4, it is characterised in that the aid system include protecgulum and with the protecgulum The shell being engaged, wherein, the protecgulum and/or the shell are made up of the metal plastic part.

6. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the aperture of the nano-pore is 20nm-100nm, the depth of the nano-pore is 1 μm -8 μm.

7. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the metal insert and the modeling The length of glue part bound fraction is 0.1mm-0.3mm.

8. sound-producing device according to claim 7, it is characterised in that the metal insert and the plastic parts bound fraction Length be 0.2mm.

9. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the metal insert and the modeling The part that glue part is combined is plate-like structure, and an end face of the plate-like structure do not wrapped up by the plastic parts.

10. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the bottom of each nano-pore that This connection.

11. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the inwall of the nano-pore has Rough surface.

12. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the resin combination be PPS, One or more in PBT, PA6 and PA66.

13. according to the sound-producing device described in any one of claim 1 to 5, it is characterised in that the metal insert is aluminum, aluminum Alloy, steel or stainless steel material.