CN214014454U - Sound box and box body plate thereof - Google Patents
Sound box and box body plate thereof Download PDFInfo
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- CN214014454U CN214014454U CN202120367246.8U CN202120367246U CN214014454U CN 214014454 U CN214014454 U CN 214014454U CN 202120367246 U CN202120367246 U CN 202120367246U CN 214014454 U CN214014454 U CN 214014454U
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Abstract
The utility model discloses a box body board of audio amplifier, including the carbon-carbon composite material layer that is located the top layer, be located the carbon-carbon composite material layer of bottom and connect in two porous material layer between the carbon-carbon composite material layer. Use the utility model provides a box body board of audio amplifier because carbon-carbon composite has very high specific modulus, provides good rigidity, and then is favorable to guaranteeing that whole audio amplifier box has higher natural frequency when using it to the box of audio amplifier. The middle layer is made of porous materials, and the sound damping effect is guaranteed by the porous materials. Therefore, the box body plate has excellent acoustic performance and is suitable for a sound box body. Meanwhile, the box body plate is light in weight, light in weight design of the sound box is facilitated, and compared with high-quality wood, the box body plate is low in cost and has excellent comprehensive performance. The utility model also discloses a box and the audio amplifier that has this box of having this box board have above-mentioned technological effect equally.
Description
Technical Field
The utility model relates to an acoustics equipment technical field, more specifically say, relate to an audio amplifier, still relate to the box and the box board of an audio amplifier.
Background
The loudspeaker box body is used as a supporting and protecting structure of the whole loudspeaker system, and the composition, the shape and the size of the material of the box body have great influence on the tone quality of the loudspeaker box.
The enclosure is designed to suppress resonance development. The reasonably designed airtight box is slightly higher than the horn resonance point in low-frequency response after inhibiting resonance, and the reasonably designed inverted box is slightly lower than the resonance point but slightly worse in transient state after inhibiting resonance, so that the low-frequency response of the horn is excavated to the maximum extent.
The wood is used as the preferred material of the high-grade sound box shell, has high specific gravity, is even in wood, and has excellent acoustic performance, but the wood used for manufacturing the sound box can only select the rare wood with even wood: rosewood, sandalwood and the like, so the price is higher.
The existing sound box is mainly made of medium density fiberboard (0.50-0.88 g/cm)3) The sound box has the advantages of good acoustic performance due to the homogeneous and porous structural characteristics, low cost, simple processing, high utilization rate and the like, and is an ideal material for manufacturing sound equipment and musical instruments. However, the medium density fiberboard is processed in a single mode, only can be nailed by iron nails, and has moderate rigidity, which is not favorable for the firmness of the box body, and is easy to resonate, thereby influencing the acoustic performance of the sound box.
To sum up, how to effectively solve the problems of poor comprehensive properties such as acoustic performance, economical efficiency and the like of the existing sound box body plate is a problem to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the first objective of the present invention is to provide a box body plate of a sound box, which can effectively solve the problem of poor comprehensive performance such as acoustic performance and economy of the existing sound box body plate by the structural design of the sound box plate, and the second objective of the present invention is to provide a sound box comprising the above box body plate and a box body thereof.
In order to achieve the first object, the present invention provides the following technical solutions:
the box body plate of the sound box comprises a carbon-carbon composite material layer positioned on the top layer, a carbon-carbon composite material layer positioned on the bottom layer and a porous material layer connected between the two carbon-carbon composite material layers.
Preferably, in the above-mentioned cabinet plate of the sound box, the porous material layer and the carbon-carbon composite material layer are bonded by an epoxy thermosetting adhesive layer.
Preferably, in the above-described cabinet panel for an acoustic enclosure, the carbon-carbon composite layer is an orthogonal reinforced carbon-carbon composite layer.
Preferably, in the above-mentioned cabinet plate for a sound box, the thickness of the carbon-carbon composite material layer is 3 to 5mm, and the density is 1.55 to 1.95g/cm3Young modulus is larger than 70Gpa, bending strength is larger than 250Mpa, and carbon fiber content is larger than 50%.
Preferably, in the cabinet plate of the sound box, the porous material layer is a polymethacrylimide foam layer.
Preferably, in the cabinet plate of the sound box, the thickness of the polymethacrylimide foam layer ranges from 10mm to 14mm, and the density ranges from 0.1 g/cm to 0.2g/cm3The compression strength is more than 3.5Mpa, and the tensile strength is more than 3 Mpa.
Preferably, in the box body plate of the sound box, the thickness of the box body plate ranges from 16 mm to 25mm, and the density ranges from 0.5 g/cm to 0.6g/cm3Young's modulus is greater than 10 GPa.
The utility model provides a box body board of audio amplifier is including the carbon-carbon composite material layer that is located the top layer, the carbon-carbon composite material layer that is located the bottom and connect in two porous material layer between the carbon-carbon composite material layer.
Use the utility model provides a box body board of audio amplifier, its top layer and bottom all adopt carbon-carbon composite layer, and carbon-carbon composite is adopted on the top layer promptly. The carbon-carbon composite material has extremely high specific modulus, so that good rigidity is provided, and the carbon-carbon composite material is favorable for ensuring that the whole sound box body has higher natural frequency when being used for the sound box body. The middle layer is made of porous materials, and the sound damping effect is guaranteed by the porous materials. Therefore, the box body plate has excellent acoustic performance and is suitable for a sound box body. Meanwhile, the box body plate is light in weight, light in weight design of the sound box is facilitated, and compared with high-quality wood, the box body plate is low in cost and has excellent comprehensive performance.
In order to achieve the second objective, the present invention further provides a speaker and a housing thereof, wherein the speaker and the housing thereof comprise any one of the above-mentioned housing plates. Because the box body plate has the technical effects, the sound box with the box body plate and the box body thereof also have corresponding technical effects.
Preferably, the case further includes a thermoplastic resin layer, and the case plate and the thermoplastic resin layer are insert injection molded as a single body.
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 these drawings without creative efforts.
Fig. 1 is a schematic structural view of a cabinet plate of a sound box according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating the preparation of one embodiment of the housing.
The drawings are numbered as follows:
the carbon-carbon composite material layer comprises a carbon-carbon composite material layer 1, a porous material layer 2 and an epoxy thermosetting adhesive layer 3.
Detailed Description
The embodiment of the utility model discloses audio amplifier and box board thereof to guarantee the acoustic performance of audio amplifier.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The selection of the box material is very important for the manufacture of the box and mainly comprises the following two aspects: 1. the cabinet needs to prevent the entire acoustic system from "staining", i.e. reducing the vibrational energy generated by the resonant absorption of the cabinet and walls, and the radiated sound waves in the natural mode of vibration can have a significant effect on the entire acoustic system. 2. The box body needs to restrain the resonance of the loudspeaker, the loudspeaker is provided with a resonance point, the loudspeaker cone can generate large-amplitude displacement by inputting small energy, and if the loudspeaker cone is not restrained, modulation distortion can be generated due to the nonlinearity of the large-amplitude displacement.
The sound box does not need box body vibration, the sound of the sound box is emitted by a loudspeaker and is pushed out by a power amplifier, the sound only needs to resonate in the sound box to emit ultra-low sound, and the vibration of the sound box plate is not needed.
Theoretically, the material of the sound box should be a material which has high density and good rigidity and can absorb sound waves. However, inorganic materials such as metal plates, slates, glass plates, cement plates, etc. have high density and high rigidity, but have poor damping effect, poor toughness, and difficult processing. The synthetic resin material has excellent damping performance, but has low rigidity, is easy to resonate, and is not suitable for being used as a sound box body.
To improve the "coloration" of the sound box, several approaches are possible: 1. increasing the thickness of the plate; 2. selecting a material with high density and difficult shock; 3. adding a damping support on the boxboard; 4. the acoustic power of the low frequency radiation is greater, and the radiated power is reduced by increasing the natural frequency of the material. However, the first and second solutions increase the thickness of the panel, making the whole cabinet bulky, which is not good for the overall aesthetic appearance of the cabinet.
Based on the analysis, the utility model provides a box body board of audio amplifier adopts the design of combined material board. Specifically, the composite material comprises a carbon-carbon composite material layer 1 positioned on the top layer, a carbon-carbon composite material layer 1 positioned on the bottom layer and a porous material layer 2 connected between the two carbon-carbon composite material layers 1.
In this application, adoptThe carbon-carbon composite material is used as the surface layer of the sound box board, namely, the upper surface and the lower surface of the sound box board are both made of carbon-carbon composite material boards, the carbon-carbon composite material is a multi-gap preform made of carbon fibers, and the gap of the preform is filled by methods such as asphalt carbonization or chemical vapor deposition. Which has a low density of<2.0g/cm3) High strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, high dimensional stability and the like. For the concrete preparation method and structure of the carbon-carbon composite material, reference is made to the prior art, and details are not repeated here. The carbon-carbon composite layer 1 is preferably an orthogonal reinforced carbon-carbon composite layer. Specifically, the thickness range of the carbon-carbon composite material layer 1 is 3 mm-5 mm, and the density is 1.55-1.95 g/cm3Young modulus is larger than 70Gpa, bending strength is larger than 250Mpa, and carbon fiber content is larger than 50%. The carbon-carbon composite material layer 1 adopting the parameters can provide enough rigidity, and has small thickness and light weight.
A porous material layer 2 is arranged between the upper carbon-carbon composite material layer 1 and the lower carbon-carbon composite material layer 1, the porous material layer 2 and the carbon-carbon composite material layer 1 form a sandwich-like structure, the carbon-carbon composite material layer 1 increases the specific modulus of the box body plate, improves the natural frequency of the sound box body, and has higher strength; the porous material layer 2 increases the damping effect of the box body material, can absorb the high-frequency vibration of the sound box shell, and the finally prepared sound box body has excellent acoustic performance. The porous material layer 2 is preferably made of hard closed-cell rigid structural material.
Use the utility model provides a box body board of audio amplifier, its top layer and bottom all adopt carbon-carbon composite layer 1, and carbon-carbon composite is adopted on the top layer promptly. The carbon-carbon composite material has extremely high specific modulus, so that good rigidity is provided, and the carbon-carbon composite material is favorable for ensuring that the whole sound box body has higher natural frequency when being used for the sound box body. The middle layer is made of porous materials, and the sound damping effect is guaranteed by the porous materials. Therefore, the box body plate has excellent acoustic performance and is suitable for a sound box body. Meanwhile, the box body plate is light in weight, light in weight design of the sound box is facilitated, and compared with high-quality wood, the box body plate is low in cost and has excellent comprehensive performance.
Specifically, the porous material layer 2 and the carbon-carbon composite material layer 1 are bonded through the epoxy thermosetting adhesive layer 3. Namely, the porous material layer 2 and the carbon-carbon composite material layer 1 are jointed through an epoxy thermosetting adhesive film so as to ensure the structural strength of the composite material.
In the above-described embodiment, the porous material layer 2 is specifically a polymethacrylimide foam layer, i.e., a PMI foam layer. The polymethacrylimide foam is light closed-cell rigid foam plastic, takes methacrylic acid MAA and methacrylonitrile MAN copolymer as matrix resin, has good mechanical property, thermal deformation temperature and chemical stability, and is an ideal core layer material of a high-performance sandwich structure composite material. The polymethacrylimide foam has a uniform pore wall structure, so that the polymethacrylimide foam has excellent mechanical properties and a good damping effect. Of course, the porous material layer 2 may be made of other conventional plastics, and preferably made of a porous hard material. Specifically, the thickness range of the polymethacrylimide foam layer is 10-14 mm, and the density is 0.1-0.2 g/cm3The compression strength is more than 3.5Mpa, and the tensile strength is more than 3 Mpa. The carbon-carbon composite material and the PMI foam material are innovatively introduced into the sound box shell material, and the prepared sound box body has the characteristics of low density and high specific modulus, so that the natural frequency of the sound box shell is shifted to high frequency. The porous material layer 2 may be a material having homogeneous porosity such as a PET (polyethylene terephthalate) foam layer, a PEI (polyetherimide) foam layer, or a PLA (polylactic acid) foam layer, as needed.
Further, the carbon-carbon composite material layer 1 and the polymethacrylimide foam layer are connected through adhesive film hot-pressing curing molding. For the specific processes of the adhesive film hot-pressing curing molding process, please refer to the prior art, which is not described herein again. This process is used only in the present application to join the carbon-carbon composite layer 1 to the polymethacrylimide foam layer. The process ensures the reliable connection of the carbon-carbon composite material layer 1 and the polymethacrylimide foam layer, and the forming process is convenient and simple. And the structural strength of the composite material is ensured by the laminating of the hot-pressing adhesive films.
Specifically, the carbon-carbon composite material layer 1 with corresponding technical parameters is selected as a top layer and a bottom layer according to requirements, the polymethacrylimide foam layer with appropriate parameters is selected as a middle layer, adhesive films are attached to the middle layer, and the composite material plate is formed through hot pressing and curing. The adhesive film can specifically adopt epoxy thermosetting adhesive, namely the carbon-carbon composite material layer 1 and the polymethacrylimide foam layer are bonded through the epoxy thermosetting adhesive layer 3. As shown in fig. 1, fig. 1 is a schematic structural diagram of a cabinet plate of a sound box according to an embodiment of the present invention. In this embodiment, the top layer and the bottom layer are respectively a carbon-carbon composite material layer 1, the middle layer is a polymethacrylimide foam layer, and the carbon-carbon composite material layer 1 and the polymethacrylimide foam layer of the top layer and the carbon-carbon composite material layer 1 and the polymethacrylimide foam layer of the bottom layer are bonded by an epoxy thermosetting adhesive layer 3. The carbon-carbon composite material on the outermost layer provides rigidity of the material, so that the whole loudspeaker box body is ensured to have higher natural frequency, and the PMI foam material on the middle layer ensures the sound damping effect of the box body material. The sound box body prepared by the sound box body plate has excellent acoustic performance.
In the above embodiments, the thickness of the box body plate ranges from 16 mm to 25mm, and the density is 0.5 g/cm to 0.6g/cm3Young's modulus is greater than 10 GPa. Namely, the plate has the characteristics of low density and high modulus, thereby providing excellent comprehensive performance when used as a sound box body.
Based on the box board that provides in the above-mentioned embodiment, the utility model also provides a box of audio amplifier, the box of this audio amplifier includes an arbitrary box board in the above-mentioned embodiment. Since the cabinet body of the sound box adopts the cabinet body plate in the above embodiment, please refer to the above embodiment for the beneficial effect of the cabinet body.
Specifically, in an embodiment of the sound box body, the sound box body further comprises a thermoplastic resin layer, and the sound box body plate and the thermoplastic resin layer are formed into a whole through insert injection molding. The thermoplastic resin layer may specifically be a Polycarbonate (PC) layer. Namely, the sound box body made of thermoplastic resin and carbon-carbon composite material, such as a sound box body made of PC and carbon-carbon composite material, is finally prepared by using any one of the above-mentioned embodiments as an insert of the sound box body and performing injection molding. For a specific insert molding process, reference is made to the prior art, and details are not repeated here. The process is used only for molding of thermoplastic resin and carbon-carbon composite materials in the present application. Specifically, the insert can be subjected to surface treatment after injection molding, such as spraying, wire drawing and the like; and finally, checking and packaging.
The box body is light in weight, but has high Young modulus and excellent acoustic characteristics.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a box. The method comprises the steps of selecting carbon-carbon composite plates with appropriate technical parameters as a top layer and a bottom layer according to requirements, selecting a polymethacrylimide foam layer with appropriate parameters as a middle layer, gluing films, and then carrying out hot pressing and curing to form the composite material. And (3) performing injection molding on the composite material as an insert, performing surface treatment such as spraying, wire drawing and the like, and then inspecting and packaging.
The utility model provides a box and box board of audio amplifier improves audio amplifier casing's natural frequency through the introduction of high ratio modulus material, and the good damping effect of intermediate level porous material in addition, steerable high-frequency vibration, therefore this box and box board have excellent acoustic effect.
Based on the box that provides in the above-mentioned embodiment, the utility model also provides an audio amplifier, this audio amplifier includes an arbitrary box in the above-mentioned embodiment. Because the sound box adopts the box body in the above embodiment, please refer to the above embodiment for the beneficial effects of the sound box.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The box body plate of the sound box is characterized by comprising a carbon-carbon composite material layer (1) positioned on the top layer, a carbon-carbon composite material layer (1) positioned on the bottom layer and a porous material layer (2) connected between the carbon-carbon composite material layers (1).
2. Panel panel for an acoustic enclosure according to claim 1, characterized in that the porous material layer (2) is bonded to the carbon-carbon composite material layer (1) by means of an epoxy thermosetting glue layer (3).
3. Panel panel for an acoustic enclosure according to claim 1, characterized in that the carbon-carbon composite layer (1) is an orthorhombic reinforced carbon-carbon composite layer.
4. Panel for sound boxes according to claim 1, characterized in that the thickness of the carbon-carbon composite layer (1) ranges from 3 to 5mm and the density ranges from 1.55 to 1.95g/cm3Young modulus is larger than 70Gpa, bending strength is larger than 250Mpa, and carbon fiber content is larger than 50%.
5. Panel panel for an acoustic enclosure according to any one of claims 1 to 4, characterized in that the layer of porous material (2) is a layer of polymethacrylimide foam or PET foam or PEI foam or PLA foam.
6. The cabinet board for an acoustic enclosure according to claim 5, wherein the polymethacrylimide foam layer has a thickness of 10 to 14mm and a density of 0.1 to 0.2g/cm3The compression strength is more than 3.5Mpa, and the tensile strength is more than 3 Mpa.
7. Box plate for an acoustic enclosure according to claim 1, characterised in that the box is such that it is a boxThe thickness of the plate is 16-25 mm, and the density is 0.5-0.6g/cm3Young's modulus is greater than 10 GPa.
8. A cabinet for an acoustic enclosure, comprising the cabinet panel according to any one of claims 1 to 7.
9. The cabinet of an acoustic enclosure according to claim 8, further comprising a thermoplastic resin layer, wherein the cabinet plate and the thermoplastic resin layer are insert-molded as one body.
10. An acoustic enclosure comprising a housing as claimed in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120367246.8U CN214014454U (en) | 2021-02-10 | 2021-02-10 | Sound box and box body plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120367246.8U CN214014454U (en) | 2021-02-10 | 2021-02-10 | Sound box and box body plate thereof |
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| Publication Number | Publication Date |
|---|---|
| CN214014454U true CN214014454U (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120367246.8U Active CN214014454U (en) | 2021-02-10 | 2021-02-10 | Sound box and box body plate thereof |
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| CN (1) | CN214014454U (en) |
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2021
- 2021-02-10 CN CN202120367246.8U patent/CN214014454U/en active Active
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