CN209964280U - Composite liquid crystal polymer sound film - Google Patents
Composite liquid crystal polymer sound film Download PDFInfo
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- CN209964280U CN209964280U CN201920555599.3U CN201920555599U CN209964280U CN 209964280 U CN209964280 U CN 209964280U CN 201920555599 U CN201920555599 U CN 201920555599U CN 209964280 U CN209964280 U CN 209964280U
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Abstract
A composite liquid crystal polymer sound membrane comprises a liquid crystal polymer base membrane and a spherical top membrane, wherein the liquid crystal polymer base membrane comprises a liquid crystal top membrane and a liquid crystal annular membrane, the spherical top membrane comprises a top membrane and an extension annular membrane, the central point of the top membrane coincides with the central point of the liquid crystal top membrane, the edge of the top membrane is flush with the edge of the liquid crystal top membrane, the top membrane coincides with the liquid crystal top membrane and can enhance the structural strength of the membrane, the inner edge of the extension annular membrane is flush with the inner edge of the liquid crystal annular membrane, the annular width of the liquid crystal annular membrane is larger than that of the extension annular membrane, the inner edge of the extension annular membrane is fixed with the edge of the top membrane, the vibration of the top membrane is transmitted to the extension annular membrane, the extension annular membrane enables the vibration transmitted by the top membrane to be in good transition, the extension annular membrane is arranged, the vibration of the top membrane can be transmitted to the liquid crystal annular membrane smoothly, and the transition smoothness between an intermediate frequency, and the vibration of the top film can be better expanded, namely, the expansion of the sound film to high frequency can be enhanced.
Description
Technical Field
The utility model relates to a sound membrane technical field especially relates to compound liquid crystal polymer sound membrane.
Background
A speaker is a device capable of converting electric energy into sound energy, and is widely used in mobile terminal devices such as earphones, mobile phones, and computers. The sound membrane is the high pitch unit among the tweeter, is the speaker unit for playback high frequency sound as the name suggests, also called the vibrating diaphragm, and the vibrating diaphragm is as vibration sound production structure, promptly, one of the key parts of speaker, has decisive influence to the tone quality of speaker. The material of the diaphragm has a crucial influence on the sound reproduction of the loudspeaker, which determines the quality of the force-to-sound conversion of the loudspeaker. Determines the power of the speaker and the quality of the reproduced sound quality.
However, the structure of the existing diaphragm is single, the structural strength is not high, the problem of distortion of medium and high frequencies is difficult to solve, and the existing diaphragm is particularly characterized in that the transition between the medium frequency and the high frequency is not smooth, and the ductility of the high frequency is not good enough.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to design a composite liquid crystal polymer acoustic membrane that can enhance the structural strength of the membrane, improve the smoothness of transition between the medium frequency and the high frequency, and enhance the ductility of the high frequency.
A composite liquid crystal polymer sound film, comprising: the liquid crystal polymer substrate comprises a liquid crystal polymer-based membrane and a spherical top membrane, wherein the spherical top membrane is attached to the liquid crystal polymer-based membrane;
the liquid crystal polymer-based membrane comprises a liquid crystal top membrane and a liquid crystal ring membrane, wherein the edge of the liquid crystal top membrane is fixed with the inner edge of the liquid crystal ring membrane, and the outer edge of the liquid crystal ring membrane is used for being fixed with a loudspeaker;
the dome membrane comprises a top membrane and an extension ring membrane, the edge of the top membrane is fixed with the inner edge of the extension ring membrane, the central point of the top membrane coincides with the central point of the liquid crystal top membrane, the edge of the top membrane is parallel and level to the edge of the liquid crystal top membrane, and the inner edge of the extension ring membrane is parallel and level to the inner edge of the liquid crystal ring membrane.
In one embodiment, the liquid crystal top film and the liquid crystal ring film are of an integrally molded structure
In one embodiment, the thickness ratio of the liquid crystal top film to the liquid crystal ring film is 1: 1.
in one embodiment, the thickness of the liquid crystal top film and the thickness of the liquid crystal ring film are both 10 um-150 um.
In one embodiment, the composite liquid crystal polymer sound film further includes an adhesive layer, and the adhesive layer is used for respectively adhering to the dome sheet and the liquid crystal polymer base sheet.
In one embodiment, a transition included angle is formed between the liquid crystal top film and the liquid crystal ring film, and the degree range of the transition included angle is 105-120 degrees.
In one embodiment, a limiting included angle is formed between the top film and the extension ring film, and the degree of the limiting included angle is the same as the degree of the transition included angle.
In one embodiment, the annular width ratio of the extension ring film to the liquid crystal ring film is 1 (10-15).
In one embodiment, the top film and the extension ring film are of an integrally formed structure.
In one embodiment, the dome membrane is a polyurethane membrane, a thermoplastic polyurethane elastomer rubber membrane, a polyetheretherketone membrane, or a polyethylene naphthalate membrane.
The composite liquid crystal polymer sound film is provided with a liquid crystal polymer base membrane and a spherical top membrane, wherein the liquid crystal polymer base membrane comprises a liquid crystal top membrane and a liquid crystal ring membrane, and the outer edge of the liquid crystal ring membrane is used for being fixed with a loudspeaker; the dome membrane comprises a top membrane and an extension ring membrane, the center point of the top membrane is coincided with the center point of the liquid crystal top membrane, the edge of the top membrane is arranged in parallel with the edge of the liquid crystal top membrane, namely, the top membrane is coincided with the liquid crystal top membrane, a single structure of a traditional sound membrane is changed, the structural strength of the membrane can be further enhanced, the inner edge of the extension ring membrane is arranged in parallel with the inner edge of the liquid crystal ring membrane, it needs to be further explained that the outer edge of the extension ring membrane is not coincided with the outer edge of the liquid crystal ring membrane, the outer edge of the extension ring membrane is positioned on the liquid crystal ring membrane, namely, the ring width of the liquid crystal ring membrane is larger than that of the extension ring membrane, the inner edge of the extension ring membrane is fixed with the edge of the top membrane, therefore, the vibration of the top membrane is transmitted to the extension ring membrane, and the vibration of the top membrane is transmitted to a good transition through the extension ring membrane, be unlikely to the vibration of top film is given in the twinkling of an eye the liquid crystal ring membrane, what the vibration of top film brought is the audio of high frequency, what the liquid crystal ring membrane brought is the audio of medium and low frequency, through setting up the extension ring membrane makes the vibration of top film can transmit more smoothly on the liquid crystal ring membrane, and then can improve excessive smooth and easy nature between medium frequency and the high frequency, and make the vibration of top film can obtain better extension, promptly, can strengthen the ductility of sound membrane to the high frequency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a composite liquid crystal polymer sound film according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of the composite liquid crystal polymer sound film shown in fig. 1.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 2, which are schematic structural diagrams of a composite liquid crystal polymer acoustic membrane 10 according to an embodiment of the present invention, the composite liquid crystal polymer acoustic membrane 10 includes: the liquid crystal polymer-based diaphragm 100 and the dome diaphragm 200, the dome diaphragm 200 is attached to the liquid crystal polymer-based diaphragm 100, that is, the dome diaphragm is disposed on the liquid crystal polymer-based diaphragm, and the liquid crystal polymer-based diaphragm serves as a main structure of the composite liquid crystal polymer sound film, and plays a main role in supporting and fixing the dome diaphragm, it should be noted that the liquid crystal polymer-based diaphragm is a diaphragm made of a liquid crystal polymer material, and a conventional sound film is mostly of a single-layer structure, and the overall structure of the sound film of the single-layer structure is weak in rigidity and light and thin in weight, but the liquid crystal polymer material of the liquid crystal polymer-based diaphragm can suppress unnecessary vibration, further reduce noise, reproduce high-resolution sound, and enhance the accuracy of music; the liquid crystal polymer-based diaphragm realizes good balance in the aspect of two seemingly contradictory characteristics of high rigidity and high internal loss, and restores high-precision sound. The composite liquid crystal polymer sound membrane is additionally provided with the spherical top membrane on the basis of the liquid crystal polymer base membrane to increase the overall rigidity, weight and thickness of the composite liquid crystal polymer sound membrane, so that the initial frequency of the composite liquid crystal polymer sound membrane when a voice coil drives the composite liquid crystal polymer sound membrane to vibrate is increased, the amplitude of the composite liquid crystal polymer sound membrane capable of vibrating is relatively increased, the loudness of a vibrating body of the composite liquid crystal polymer sound membrane when vibrating is increased, namely, the sensitivity of the composite liquid crystal polymer sound membrane is weakened, the FO value (initial frequency value) is increased, it needs to be noted that FO is the lowest resonance frequency of a horn in a loudspeaker manufacturing process, namely, the overall rigidity and thickness of the composite liquid crystal polymer sound membrane can be changed by increasing the spherical top membrane, so as to change the transient response of the composite liquid crystal polymer sound membrane when vibrating, meanwhile, the frequency response of medium and high frequencies can be changed by increasing the thickness of the central part of the composite liquid crystal polymer sound film, and the rigidity of the composite liquid crystal polymer sound film can be changed by the material part, so that the frequency response of the medium and high frequencies can be changed.
Referring to fig. 1 and fig. 2, the liquid crystal polymer-based film 100 includes a liquid crystal top film 110 and a liquid crystal ring film 120, wherein an edge of the liquid crystal top film 110 is fixed to an inner edge of the liquid crystal ring film 120, and an outer edge of the liquid crystal ring film 120 is fixed to a speaker; the dome membrane 200 includes a top membrane 210 and an extended ring membrane 220, an edge of the top membrane 210 is fixed to an inner edge of the extended ring membrane 220, a center point of the top membrane 210 coincides with a center point of the liquid crystal top membrane 110, and an edge of the top membrane 210 is flush with an edge of the liquid crystal top membrane 110, that is, the top membrane coincides with the liquid crystal top membrane, so that a single structure of a conventional sound membrane is changed, and the structural strength of the membrane can be further enhanced, an inner edge of the extended ring membrane 220 is flush with an inner edge of the liquid crystal ring membrane 120, it needs to be further explained that an outer edge of the extended ring membrane does not coincide with an outer edge of the liquid crystal ring membrane, an outer edge of the extended ring membrane is located on the liquid crystal ring membrane, that is, a ring width of the liquid crystal ring membrane is greater than a ring width of the extended ring membrane, and an inner edge of the extended ring membrane is fixed to an edge of the top membrane, therefore, the vibration of the top film is transmitted to the extension annular film, the vibration transmitted by the top film is enabled to be very excessive through the extension annular film, the vibration of the top film is not transmitted to the liquid crystal annular film instantly, the vibration of the top film brings a high-frequency sound effect, the vibration of the liquid crystal annular film brings a medium-frequency and low-frequency sound effect, the vibration of the top film can be transmitted to the liquid crystal annular film smoothly through the extension annular film, the excessive smoothness between the medium frequency and the high frequency can be further improved, the vibration of the top film can be enabled to be well extended, and the extensibility of the sound film to the high frequency can be enhanced.
In one embodiment, the liquid crystal top film and the liquid crystal ring film are of an integrally formed structure, which is beneficial to enhancing the overall structural strength of the liquid crystal top film and the liquid crystal ring film; for example, the thickness ratio of the liquid crystal top film to the liquid crystal ring film is 1: 1; for another example, the thicknesses of the liquid crystal top film and the liquid crystal ring film are both 10um to 150um, and certainly, the thicknesses of the liquid crystal top film and the liquid crystal ring film are not limited to the thicknesses indicated in the above embodiments, and the thicknesses required by actual production are taken as the standard.
In one embodiment, the composite liquid crystal polymer sound film further comprises an adhesive layer, wherein the adhesive layer is respectively used for adhering to the dome membrane and the liquid crystal polymer base membrane, so that the dome membrane and the liquid crystal polymer base membrane can be adhered more firmly.
In an embodiment, referring to fig. 2, a transition included angle 101 is formed between the liquid crystal top film 110 and the liquid crystal ring film 120, and the degree range of the transition included angle 101 is 105 degrees to 120 degrees; for example, a limit included angle 201 is formed between the top film 210 and the extension ring film 220, and the degree of the limit included angle 201 is the same as the degree of the transition included angle 101, that is, the degree of the limit included angle 201 is 105 ° to 120 °, so that the dome film can better adhere to the liquid crystal polymer-based film; for another example, the ring width ratio of the extended ring film to the liquid crystal ring film is 1 (10-15), that is, the ring width of the extended ring film is smaller than that of the liquid crystal ring film.
In one embodiment, the top film and the extended ring film are of an integrally formed structure, which is beneficial to enhancing the overall structural strength of the top film and the extended ring film; for example, the dome membrane is a polyurethane membrane, a thermoplastic polyurethane elastomer rubber membrane, a polyether ether ketone membrane or a polyethylene naphthalate membrane, but the dome membrane is not limited to the membrane made of the above-mentioned material, and may be a membrane made of other materials, so as to realize the structural function of the dome membrane.
The composite liquid crystal polymer sound film is provided with a liquid crystal polymer base film 100 and a dome film 200, wherein the liquid crystal polymer base film 100 comprises a liquid crystal top film 110 and a liquid crystal ring film 120, and the outer edge of the liquid crystal ring film 120 is used for being fixed with a loudspeaker; the dome membrane 200 includes a top membrane 210 and an extended ring membrane 220, a central point of the top membrane 210 coincides with a central point of the liquid crystal top membrane 110, an edge of the top membrane 210 is flush with an edge of the liquid crystal top membrane 110, that is, the top membrane coincides with the liquid crystal top membrane, a single structure of a conventional sound membrane is changed, and further, the structural strength of the membrane can be enhanced, an inner edge of the extended ring membrane 220 is flush with an inner edge of the liquid crystal ring membrane 120, it is further described that the outer edge of the extended ring membrane does not coincide with the outer edge of the liquid crystal ring membrane, the outer edge of the extended ring membrane is located on the liquid crystal ring membrane, that is, the ring width of the liquid crystal ring membrane is greater than the ring width of the extended ring membrane, the inner edge of the extended ring membrane is fixed with the edge of the top membrane, and thus, the vibration of the top membrane is transmitted to the extended ring membrane, the stretching annular membrane is arranged, so that the vibration transmitted by the top membrane is well excessive, the vibration of the top membrane is not transmitted to the liquid crystal annular membrane instantly, the vibration of the top membrane brings a high-frequency sound effect, the vibration of the liquid crystal annular membrane brings a medium-frequency and low-frequency sound effect, the vibration of the top membrane can be smoothly transmitted to the liquid crystal annular membrane, the excessive smoothness between the medium frequency and the high frequency can be improved, the vibration of the top membrane can be well stretched, and the ductility of the sound membrane to the high frequency can be enhanced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments are only intended to illustrate some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A composite liquid crystal polymer sound film is characterized by comprising: the liquid crystal polymer substrate comprises a liquid crystal polymer-based membrane and a spherical top membrane, wherein the spherical top membrane is attached to the liquid crystal polymer-based membrane;
the liquid crystal polymer-based membrane comprises a liquid crystal top membrane and a liquid crystal ring membrane, wherein the edge of the liquid crystal top membrane is fixed with the inner edge of the liquid crystal ring membrane, and the outer edge of the liquid crystal ring membrane is used for being fixed with a loudspeaker;
the dome membrane comprises a top membrane and an extension ring membrane, the edge of the top membrane is fixed with the inner edge of the extension ring membrane, the central point of the top membrane coincides with the central point of the liquid crystal top membrane, the edge of the top membrane is parallel and level to the edge of the liquid crystal top membrane, and the inner edge of the extension ring membrane is parallel and level to the inner edge of the liquid crystal ring membrane.
2. A composite liquid crystal polymer sound membrane according to claim 1, wherein the liquid crystal top membrane and the liquid crystal ring membrane are of an integrally formed structure.
3. A composite liquid crystal polymer sound film according to claim 1, wherein the thickness ratio of the liquid crystal top film to the liquid crystal ring film is 1: 1.
4. the composite liquid crystal polymer sound film according to claim 3, wherein the thickness ranges of the liquid crystal top film and the liquid crystal ring film are both 10um to 150 um.
5. A composite liquid crystal polymer sound diaphragm according to claim 1, further comprising an adhesive layer for respectively adhering to the dome sheet and the liquid crystal polymer base sheet.
6. The composite liquid crystal polymer sound film according to claim 1, wherein a transition angle is formed between the liquid crystal top film and the liquid crystal ring film, and the degree range of the transition angle is 105 ° to 120 °.
7. The composite liquid crystal polymer sound film according to claim 6, wherein a limiting included angle is formed between the top film and the extension ring film, and the degree of the limiting included angle is the same as the degree of the transition included angle.
8. The composite liquid crystal polymer sound film according to claim 1, wherein the annular width ratio of the extension ring film to the liquid crystal ring film is 1 (10-15).
9. A composite liquid crystal polymer sound membrane according to claim 1, wherein the top membrane and the extension ring membrane are of an integrally formed structure.
10. The composite liquid crystal polymer sound film according to claim 1, wherein the dome membrane is a polyurethane membrane, a thermoplastic polyurethane elastomer rubber membrane, a polyether ether ketone membrane or a polyethylene naphthalate membrane.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654803A (en) * | 2020-04-22 | 2020-09-11 | 深圳市信维通信股份有限公司 | Preparation method of liquid crystal film, liquid crystal film and earphone diaphragm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654803A (en) * | 2020-04-22 | 2020-09-11 | 深圳市信维通信股份有限公司 | Preparation method of liquid crystal film, liquid crystal film and earphone diaphragm |
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