CN111954126A

CN111954126A - Carbon fiber dome and loudspeaker

Info

Publication number: CN111954126A
Application number: CN202010622381.2A
Authority: CN
Inventors: 胡洪建; 宋小军; 李帅
Original assignee: Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-11-17
Also published as: WO2022000633A1

Abstract

The invention relates to the technical field of electroacoustic devices, in particular to a carbon fiber dome and a loudspeaker. This carbon fiber ball top is including the first carbon fiber layer, substrate layer and a plurality of second carbon fiber layer that stack gradually the setting, and first carbon fiber layer includes relative upper surface and lower surface, and the upper surface on first carbon fiber layer is located to the substrate layer, and the upper surface includes hollow first region and encloses to locate first region second region all around, and the second region includes at least two-layer carbon fiber unilateralism preimpregnation material. According to the carbon fiber dome and the loudspeaker, the number of stacked layers in the middle local area of the carbon fiber dome is smaller than that in the peripheral area, so that the thickness of the carbon fiber dome is reduced, the quality of the carbon fiber dome is reduced, and the high-frequency performance of a product is improved.

Description

Carbon fiber dome and loudspeaker

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of electroacoustic devices, in particular to a carbon fiber dome and a loudspeaker.

[ background of the invention ]

The dome-shaped loudspeaker is a loudspeaker which directly radiates sound waves by utilizing a dome-shaped vibrating diaphragm, belongs to an electrodynamic loudspeaker, and is a hemispherical diaphragm which directly supports a voice coil without a centering support piece by using a vibrating diaphragm corrugated ring.

The carbon fiber ball top in the prior art is generally formed by stacking multiple layers of carbon fiber materials completely and uniformly, but the product has poor high-frequency response and poor sound production quality.

Therefore, there is a need to provide a new technical solution to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a carbon fiber spherical roof and a loudspeaker, which can solve the problem of poor high-frequency response of a product caused by uniform stacking of multiple layers of carbon fiber materials in the prior art.

The technical scheme of the invention is as follows: the utility model provides a carbon fiber ball top, including first carbon fiber layer, substrate layer and a plurality of second carbon fiber layer that stacks gradually the setting, first carbon fiber layer includes relative upper surface and lower surface, the substrate layer is located the upper surface on first carbon fiber layer, the upper surface includes hollow first region and encloses to be located first region second region all around, the second region includes at least two-layer carbon fiber unilateralism preimpregnation material.

Preferably, the second carbon fiber layer comprises at least two layers of carbon fiber unidirectional tape prepregs.

Preferably, the carbon fiber unidirectional tape prepreg comprises a carbon fiber material and a prepreg resin, and the tensile modulus of the carbon fiber material is greater than 200 Gpa.

Preferably, the prepreg resin comprises one or more of epoxy resin, polyetheretherketone, polyimide, polyphenylene sulfide, poly-p-phenylene benzobisoxazole and poly-p-phenylene terephthalamide.

Preferably, the included angle of the fibers of the carbon fiber unidirectional tape prepreg of two adjacent second carbon fiber layers is 0-90 degrees.

Preferably, the included angle between the fibers of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer and the carbon fiber unidirectional tape prepreg of the second carbon fiber layer is 0-90 degrees.

Preferably, the carbon fiber ball top is in a round corner rectangle, and the fiber direction of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer extends along the short axis direction of the carbon fiber ball top.

Preferably, the fiber direction of the carbon fiber unidirectional tape prepreg of the second carbon fiber layer close to the first carbon fiber layer extends along the long axis direction of the carbon fiber ball top.

Preferably, the substrate layer is provided with through holes and comprises one of a foam material, an aluminum foil or polyethylene naphthalate.

The other technical scheme of the invention is as follows: a loudspeaker is provided, which comprises the carbon fiber dome.

The invention has the beneficial effects that: through set up hollow first region and enclose at first carbon fiber layer and locate first region second region all around, the second region includes two-layer carbon fiber unilateralism area preimpregnation material at least for the number of piles of regional piling up of the middle part of carbon fiber ball top is less than the number of piles of regional all around, has reduced the thickness of carbon fiber ball top and has alleviateed the quality of carbon fiber ball top, has improved the high frequency performance of product.

[ description of the drawings ]

Fig. 1 is an exploded schematic view of a speaker according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a speaker according to an embodiment of the present invention;

FIG. 3 is an exploded view of a carbon fiber dome according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a first carbon fiber layer of an embodiment of the present invention;

FIG. 5 is a schematic view of a partially enlarged structure of the area A of the substrate layer in FIG. 3;

FIG. 6 is a cross-sectional view of a carbon fiber dome of an embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of the first carbon fiber layer B of FIG. 3;

FIG. 8 is a partially enlarged schematic structural view of a region of the first sub carbon fiber layer C in FIG. 3;

fig. 9 is a partially enlarged structural view of a region D of the second sub-second carbon fiber layer in fig. 3.

[ detailed description ] embodiments

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

The terms "first", "second" and "third" in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. All directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is an exploded structural schematic view of a speaker according to an embodiment of the present invention, fig. 2 is a perspective structural schematic view of the speaker according to the embodiment of the present invention, and as shown in fig. 1 and fig. 2, the speaker 100 includes a frame 10, and a vibration system 20 and a magnetic circuit system 30 respectively fixed to the frame 10, a fixing support 11 is provided on the frame 10, the vibration system 20 is located above the fixing support 11, and the magnetic circuit system 30 is located below the fixing support 11. The vibration system 20 includes a diaphragm 21 fixed on the fixed support 11 and a voice coil 22 located below the diaphragm 21 and used for driving the diaphragm 21 to vibrate and generate sound, the diaphragm 21 includes a carbon fiber ball top 200 and a corrugated rim 210 disposed around the carbon fiber ball top 200, and the periphery of the corrugated rim 210 is fixed on the fixed support 11. The magnetic circuit system 30 includes a magnetic bowl 31, a main magnetic steel 32 disposed in the magnetic bowl 31, a magnetic conductive plate 33 disposed above the main magnetic steel 32, and an auxiliary magnetic steel 34 surrounding the main magnetic steel 32. Wherein, a magnetic gap is formed between the main magnet steel 32 and the auxiliary magnet steel 34.

As shown in fig. 1, the grommet 210 includes a first fixing portion 2101 fixedly connected to the carbon fiber dome 200, a grommet portion 2102 surrounding the first fixing portion 2101, and a second fixing portion 2103 surrounding the grommet portion 2102 and fixed to the frame 10, and the first fixing portion 2101 is provided with an opening a at an intermediate position for mounting the carbon fiber dome 200, as shown in fig. 1.

Fig. 3 is an exploded schematic view of a carbon fiber dome according to an embodiment of the present invention, please refer to fig. 1 and fig. 3, the carbon fiber dome 200 of the embodiment is a rounded rectangle, and in other embodiments, the carbon fiber dome 200 may also be in other shapes matching with the corrugated rim 210. The carbon fiber dome 200 includes a first carbon fiber layer 1, a substrate layer 2, and a plurality of second carbon fiber layers 3, which are sequentially stacked. Wherein, the first carbon fiber layer 1 is disposed on one side close to the voice coil 22.

Fig. 4 is a schematic structural diagram of a first carbon fiber layer according to an embodiment of the present invention, please refer to fig. 4, where the first carbon fiber layer 1 includes an upper surface 101 and a lower surface 102 which are opposite to each other, the substrate layer 2 is disposed on the upper surface 101 of the first carbon fiber layer 1, the upper surface 101 includes a hollow first region 1011 and a second region 1012 which is disposed around the first region 1011, and the second region 1012 includes at least two layers of carbon fiber unidirectional tape prepregs. The first carbon fiber layer 1 of this embodiment is provided with the hollow first region 1011, so that the number of stacked layers in the middle local region of the carbon fiber dome 200 is less than that in the surrounding regions, the thickness of the carbon fiber dome 200 is reduced, the quality of the carbon fiber dome 200 is reduced, and the high-frequency performance of the product is improved.

Referring to fig. 4 and 5, the substrate layer 2 includes a first surface 201 and a second surface 202 opposite to each other, the second carbon fiber layer 3 is disposed on the first surface 201, and the first carbon fiber layer 1 is disposed on the second surface 202, referring to fig. 4, a plurality of through holes 2011 are disposed on the first surface 201, and the plurality of through holes 2011 are arranged in an array. The substrate layer 2 of the present embodiment is one of a foam material, an aluminum foil, and polyethylene naphthalate. The substrate layer 2 of this embodiment further reduces the quality of the carbon fiber dome 200 by providing the through hole 2011, improves the vibration performance, and improves the high-frequency performance of the product.

The second carbon fiber layer 3 includes at least two layers of carbon fiber unidirectional tape prepregs. The first carbon fiber layer 1 and the second carbon fiber layer 3 of the present embodiment may use carbon fiber unidirectional tape prepregs having the same or different number of layers, and the multilayer carbon fiber unidirectional tape prepregs are processed by hot press molding.

Further, the fiber included angle of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer 1 and the second carbon fiber layer 3 is 0-90 degrees, and preferably 0-45 degrees. The included angle of the fibers of the carbon fiber unidirectional tape prepreg of two adjacent second carbon fiber layers 3 is 0-90 degrees, and preferably 0-45 degrees. The fiber direction between first carbon fiber layer 1 and the second carbon fiber layer 3 and between the adjacent second carbon fiber layer 3 forms certain angle, has guaranteed that all directions atress is balanced, and adjacent second carbon fiber layer 3 passes through hot briquetting and handles, forms a body structure, and intensity is high, and is difficult broken.

In the present embodiment, please refer to fig. 3, which illustrates an example of two second carbon fiber layers 3, wherein the second carbon fiber layer 3 includes a first sub carbon fiber layer 301 and a second sub carbon fiber layer 302. Referring to fig. 6 and 7, the fiber direction of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer 1 extends along the short axis direction of the carbon fiber dome, the fiber direction of the carbon fiber unidirectional tape prepreg of the first sub carbon fiber layer 301 close to the first carbon fiber layer 1 extends along the long axis direction of the carbon fiber dome 200, as shown in fig. 8, the fiber direction of the carbon fiber unidirectional tape prepreg of the second sub carbon fiber layer 302 adjacent to the first sub carbon fiber layer 301 extends along the short axis direction of the carbon fiber dome 200, as shown in fig. 9.

The carbon fiber unidirectional tape prepreg of the embodiment comprises a carbon fiber material and prepreg resin, and can be obtained by adopting the following method: the thermosetting pre-impregnated resin is impregnated or sprayed on the carbon fiber unidirectional tape, and then the carbon fiber unidirectional tape impregnated material with the pre-impregnated resin cured substance is formed on the carbon fiber unidirectional tape after high-temperature and high-pressure treatment. The carbon fiber unidirectional tape prepreg can extend in the fiber direction, namely the fiber direction can bear large stress, the fiber direction can bear weak stress in the direction vertical to the fiber direction, and the stress bearing capacity is greatly enhanced after the prepreg resin is cured.

Wherein the pre-impregnated resin comprises one or more of epoxy resin, polyether ether ketone, polyimide, polyphenylene sulfide, poly (p-phenylene benzobisoxazole) and poly (p-phenylene terephthalamide). The tensile modulus of the carbon fiber material in the carbon fiber unidirectional tape prepreg is more than 200 Gpa. The carbon fiber material in the carbon fiber unidirectional tape prepreg can adopt the materials of more than Tollian T series T300 and M series, and other series and other suppliers with the same strength grade, and it is to be noted that the Tollian T series and M series are carbon fiber models of Japan Tollian company, belong to the industry standard, and the two series materials can be easily obtained by the technical personnel in the field.

The number of stacked layers in the middle local area of the carbon fiber dome 200 of the embodiment of the invention is less than that in the peripheral area, so that the thickness of the middle area of the carbon fiber dome 200 is reduced, the overall quality of the carbon fiber dome 200 is reduced, and the high-frequency performance of the product is improved. In addition, the surface of the ball top structure can be smooth after the resin in the carbon fiber unidirectional tape prepreg is cured, and the cured resin is hard and is not easy to scratch, so that the carbon fiber ball top 200 structure is more attractive.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a carbon fiber ball top, its characterized in that, carbon fiber ball top is including the first carbon fiber layer, substrate layer and a plurality of second carbon fiber layer that stack gradually the setting, first carbon fiber layer includes relative upper surface and lower surface, the substrate layer is located the upper surface of first carbon fiber layer, the upper surface includes hollow first region and encloses to be located first region second region all around, the second region includes at least two-layer carbon fiber unilateralism area preimpregnation material.

2. The carbon fiber dome of claim 1, wherein the second carbon fiber layer comprises at least two layers of carbon fiber unidirectional tape prepreg.

3. The carbon fiber dome of claim 2, wherein the carbon fiber unidirectional tape prepreg comprises a carbon fiber material and a prepreg resin, and the carbon fiber material has a tensile modulus greater than 200 Gpa.

4. The carbon fiber dome of claim 3, wherein the prepreg resin comprises one or more of epoxy, polyetheretherketone, polyimide, polyphenylene sulfide, poly-p-phenylene benzobisoxazole, and poly-p-phenylene terephthalamide.

5. The carbon fiber dome according to claim 2, wherein the included angle of the fibers of the carbon fiber unidirectional tape prepreg of two adjacent second carbon fiber layers is 0-90 °.

6. The carbon fiber dome according to claim 5, wherein the fiber included angle of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer and the second carbon fiber layer is 0-90 °.

7. The carbon fiber dome according to claim 6, wherein the carbon fiber dome is a rounded rectangle, and the fiber direction of the carbon fiber unidirectional tape prepreg of the first carbon fiber layer extends in the minor axis direction of the carbon fiber dome.

8. The carbon fiber dome according to claim 7, wherein a fiber direction of the carbon fiber unidirectional tape prepreg of the second carbon fiber layer adjacent to the first carbon fiber layer extends in a long axis direction of the carbon fiber dome.

9. The carbon fiber dome according to claim 1, wherein the substrate layer is provided with through holes, and the substrate layer comprises one of a foamed material, an aluminum foil, or polyethylene naphthalate.

10. A loudspeaker, characterized in that the loudspeaker comprises a carbon fiber dome according to any one of claims 1 to 9.