CN112887865B - Wireless earphone - Google Patents
Wireless earphone Download PDFInfo
- Publication number
- CN112887865B CN112887865B CN202110116103.4A CN202110116103A CN112887865B CN 112887865 B CN112887865 B CN 112887865B CN 202110116103 A CN202110116103 A CN 202110116103A CN 112887865 B CN112887865 B CN 112887865B
- Authority
- CN
- China
- Prior art keywords
- composite layer
- piezoelectric composite
- voice coil
- vibrating diaphragm
- processing module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002131 composite material Substances 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000010248 power generation Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 229920000620 organic polymer Polymers 0.000 claims description 4
- 239000002952 polymeric resin Substances 0.000 claims description 4
- 239000006261 foam material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The application discloses wireless earphone includes: the sound production device is used for producing sound by vibrating the vibrating diaphragm; the power generation device comprises a piezoelectric composite layer and a current processing module, the piezoelectric composite layer is arranged close to the vibrating diaphragm, and the current processing module is electrically connected with the piezoelectric composite layer; the battery is electrically connected with the sound generating device and the current processing module respectively; when the vibrating diaphragm is in a vibrating state, the piezoelectric composite layer generates current, and the current is stored in the battery after being processed by the current processing module. In the embodiment of the application, when vibrating diaphragm vibration sound production, piezoelectric composite layer receives external force to take place deformation and produce the electric current, and electric current reserves in the battery after the conversion of current processing module, has realized the effect for battery charge can improve wireless earphone's the length of time of use.
Description
Technical Field
The application belongs to the technical field of consumer electronic equipment, and particularly relates to a wireless earphone.
Background
With the development of electronic equipment technology, electronic equipment such as mobile phones has become a necessity for people to live every day, but with the reduction of the volume of most electronic equipment, the appearance is more attractive, and a separate earphone hole is eliminated, so that the earphone hole and a charging hole of the electronic equipment are integrated into one jack, and when the mobile phone is charged in a wired manner, the wired earphone cannot be used at the same time, so that more and more users select wireless earphone.
In the process of realizing the wireless earphone, the inventor finds that at least the following problems exist in the prior art, and the wireless earphone is convenient to wear, so that the manufactured volume is small, and the battery in the wireless earphone stores less electric quantity due to the limited volume of the wireless earphone, so that the single operation duration of the wireless earphone is short.
Disclosure of Invention
The application aims at providing a wireless earphone which at least solves the problem that the wireless earphone is long and short in use.
In order to solve the technical problems, the application is realized as follows:
the embodiment of the application provides a wireless earphone, which comprises:
the sound production device is used for producing sound by vibrating the vibrating diaphragm;
the power generation device comprises a piezoelectric composite layer and a current processing module, the piezoelectric composite layer is arranged close to the vibrating diaphragm, and the current processing module is electrically connected with the piezoelectric composite layer;
the battery is electrically connected with the sound generating device and the current processing module respectively;
when the vibrating diaphragm is in a vibrating state, the piezoelectric composite layer generates current.
In the embodiment of the application, when vibrating diaphragm vibration sound production, piezoelectric composite layer receives external force to take place deformation and produce the electric current, and electric current reserves in the battery after the conversion of current processing module, has realized the effect for battery charge can improve wireless earphone's the length of time of use.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a cross-sectional view of a wireless headset according to an embodiment of the invention;
fig. 2 is a circuit configuration diagram of a power generation device according to an embodiment of the present invention.
Reference numerals:
1. a sound producing device; 11. a moving coil unit; 111. a vibrating diaphragm; 112. an iron stand; 113. a magnet; 114. an iron core; 115. a voice coil; 116. centering support pieces; 117. a cone; 118 voice coil former; 12. a lead wire; 13. a housing; 131. a sound outlet hole; 14. a fixing part; 2. a power generation device; 21. a piezoelectric composite layer; 22. a current processing module; 221. a rectifying circuit; 222. a filter circuit; 223. a voltage stabilizing circuit; 224. a differential amplifying circuit; 225. and a power amplifying circuit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
A wireless headset according to an embodiment of the present invention is described below with reference to fig. 1 to 2, including:
a sound generating device 1, wherein the sound generating device 1 generates sound by vibration of a vibrating diaphragm 111; when the vibration of the diaphragm 111 is generated,
the power generation device 2 comprises a piezoelectric composite layer 21 and a current processing module 22, wherein the piezoelectric composite layer 21 is arranged close to the vibrating diaphragm 111, and the current processing module 22 is electrically connected with the piezoelectric composite layer 21; the principle of generating a current in the piezoelectric composite layer 21 is as follows, wherein when the piezoelectric composite layer 21 receives a pressure Fz, an electric charge generated on the surface is: q=d11×fz×s, where d11 is the piezoelectric constant and S is the polarization area, i.e., the amount of charge generated is proportional to the polarization area. That is, when the area of the piezoelectric composite layer 21 is larger, the amount of generated charge is larger, and the current intensity is also larger.
A battery electrically connected to the sound generating device 1 and the current processing module 22, respectively; the battery provides power for the sound generating device 1, and meanwhile, the current generated by the piezoelectric composite layer 21 can charge the battery after being processed by the current processing module 22.
When the diaphragm 111 is in a vibrating state, the piezoelectric composite layer 21 generates a current, and the current is stored in the battery after being processed by the current processing module 22. The vibration membrane 111 can make nearby air produce vibration in the vibration process to make the piezoelectricity composite layer 21 that is close to the vibration membrane 111 receive pressure and produce deformation, and this moment piezoelectricity composite layer 21 can produce certain electric current, and this electric current can't direct reserve in the battery, need after the processing of current processing module 22, can regard as the reserve in the battery, has realized charging to the battery, has thus prolonged the duration that the wireless earphone is single-use promptly, has saved the energy.
Optionally, the current processing module 22 includes a rectifying circuit 221, a filtering circuit 222, a voltage stabilizing circuit 223, a differential amplifying circuit 224 and a power amplifying circuit 225 which are electrically connected in sequence, the rectifying circuit 221 is electrically connected to the piezoelectric composite layer 21, and the power amplifying circuit 225 is electrically connected to the battery. The rectifier circuit 221 converts the ac power generated by the piezoelectric composite layer 21 into dc power. The filter circuit 222 reduces the ac component remaining in the dc as much as possible, retains the dc component, and reduces the ripple coefficient of the output voltage, thereby smoothing the waveform. The voltage stabilizing circuit 223 is a power supply circuit that can keep the output voltage substantially unchanged when the input grid voltage fluctuates or the load changes. The differential amplifying circuit 224 suppresses the common mode signal by the differential amplifier, amplifies the differential signal, suppresses the occurrence of the zero drift phenomenon, and ensures the primary amplification of the dc power supply. The power amplifying circuit 225 can perform secondary amplification on the direct current power supply, output relatively stable high-density energy, and finally perform energy storage and charging on the battery.
Specifically, the rectifying circuit 221 may be a bridge rectifying and filtering circuit 222, but is not limited to the bridge rectifying and filtering circuit 222, and any structure capable of converting the ac power generated by the piezoelectric composite layer 21 into dc power may be used, such as a full-wave rectifying circuit 221 or a voltage-doubler rectifying circuit 221. The filtering circuit 222 uses a capacitive filtering mode, and the capacitive filtering can enable the voltage waveform after filtering to be smoother, but the specific structure of the filtering circuit 222 is not limited to the capacitive filtering, and the circuit for filtering the current can be realized. The voltage stabilizing circuit 223 uses a circuit composed of a zener diode device, but is not limited to the zener diode device as such.
Alternatively, the piezoelectric composite layer 21 is composed of an electrodeless piezoelectric ceramic material and an organic polymer resin material. The electrodeless piezoelectric ceramic material and the organic polymer resin material have the performances of inorganic and organic piezoelectric materials, and after being combined, the electrodeless piezoelectric ceramic material and the organic polymer resin material have the advantages of high elasticity, low density, small acoustic impedance, high receiving sensitivity and the like, are very suitable for being used as the piezoelectric composite layer 21, deform when the piezoelectric material is subjected to external force, and the positive and negative charge centers are not overlapped any more due to the relative displacement of positive and negative ions in the piezoelectric material, so that macroscopic polarization occurs in the piezoelectric material. By utilizing the characteristics, the mutual conversion between the pressure of the sound wave generated by the diaphragm 111 and the electric energy can be realized, namely, when the sound wave generated by the diaphragm 111 hits the piezoelectric material, the electrodes at two ends of the material generate charges to form current.
Optionally, the sound generating device 1 includes a moving coil unit 11, the moving coil unit 11 includes a iron frame 112, a magnet 113, an iron core 114, a voice coil 115, a centering support 116, a cone 117 and a voice coil skeleton 118, the diaphragm 111 is fixed on one side of the iron frame 112, one side of the iron frame 112 far away from the diaphragm 111 is fixed on the magnet 113, the magnet 113 is annular, the iron core 114 is disposed in an annular space of the magnet 113, a magnetic gap is formed between the iron core 114 and the magnet 113, one end of the cone 117 is connected with the diaphragm 111, the other end of the cone 117 is connected with the voice coil skeleton 118, the voice coil skeleton 118 surrounds the iron core 114 and is disposed in the magnetic gap, the voice coil 115 is wound on the voice coil skeleton 118, and the centering support 116 is connected between the cone 117 and the iron frame 112. When alternating current flows on the voice coil 115, driving force is generated according to the left hand rule, and meanwhile, the diaphragm 111 is driven to vibrate through the cone 117. After the diaphragm 111 vibrates and sounds, the sound wave pressure generated by the diaphragm 111 causes the piezoelectric composite layer 21 to form current, and the current is stored in a battery after being processed by the current processing module 22, so as to continuously supply power to the voice coil 115. Because cone 117 and voice coil skeleton 118 also can vibrate along with voice coil 115, lead to cone 117 and voice coil skeleton 118 to rock in iron stand 112 easily, lead to acoustic performance to drop, centering piece 116 can provide better stability for cone 117 and voice coil skeleton 118, has guaranteed sound generating mechanism's acoustic performance stability.
In the present embodiment, the moving coil unit 11 is merely taken as an example, and the technical effect to be achieved in the present embodiment can be achieved by a structure in which a moving iron unit or the like is generated through the diaphragm 111.
Optionally, the sound generating device 1 further includes a lead 12, and the lead 12 is electrically connected to the voice coil 115 and the battery, respectively. The lead wire 12 connects the battery and the voice coil 115 to supply power for vibration of the moving coil unit 11.
Optionally, the wireless earphone further includes a housing 13, and the moving coil unit 11 is disposed in the housing 13. The shell 13 is used for protecting the moving coil unit 11, so that the damage of the wireless earphone caused by the damage of the moving coil unit 11 caused by external force can be avoided, and the audio frequency can not be normally played.
Optionally, the wireless earphone further includes a fixing portion 14, the fixing portion 14 is annular, one end of the housing 13 is fixed on the fixing portion 14, the diaphragm 111 faces toward the fixing portion 14, the diaphragm 111 and the fixing portion 14 are coaxially disposed, and a sound outlet 131 is formed on a side, close to the fixing portion 14, of the housing 13. The fixing portion 14 is used for fixing the housing 13, and simultaneously, the sound making of the moving coil unit 11 is more stable, and the acoustic performance of the sound generating device 1 is improved. As shown in fig. 1, the sound outlet 131 corresponds to a hollow region of the annular fixing portion 14, and sound is emitted from the diaphragm 111, then passes through the sound outlet 131, and passes through the hollow region of the fixing portion 14.
Optionally, the fixing portion 14 is composed of a foaming material. The fixing portion 14 is preferably made of a foaming material, and is used for fixing the housing 13, protecting the housing 13 from collision, further protecting the integrity of the structure of the moving coil unit 11, and improving the acoustic performance of the sound generating device 1.
Alternatively, the piezoelectric composite layer 21 is disposed outside the housing 13 at the position of the sound outlet 131, and the piezoelectric composite layer 21 is disposed parallel to the diaphragm 111. In this embodiment, the piezoelectric composite layer 21 and the diaphragm 111 are separated by the casing 13 at the side where the sound hole 131 is provided, and after the diaphragm 111 vibrates, the electric charges can be generated in the piezoelectric composite layer 21 by using the sound pressure. The embodiment can charge the battery and the sound generating device 1 can maintain good acoustic performance.
Alternatively, the piezoelectric composite layer 21 is attached to the diaphragm 111. In this embodiment, the piezoelectric composite layer 21 and the diaphragm 111 are attached to each other, when the diaphragm 111 vibrates, the piezoelectric composite layer 21 vibrates along with the vibration, meanwhile, more charges are generated by pressure in the piezoelectric composite layer 21, and more electric energy reserves can be provided for the battery after the charges are processed by the current processing module 22.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A wireless headset, comprising:
the sound generating device is internally provided with a vibrating diaphragm and comprises a moving coil unit, wherein the moving coil unit comprises a voice coil and a cone;
the power generation device comprises a piezoelectric composite layer and a current processing module, the piezoelectric composite layer is arranged close to the vibrating diaphragm, and the current processing module is electrically connected with the piezoelectric composite layer;
the battery is electrically connected with the sound generating device and the current processing module respectively;
when the vibrating diaphragm is in a vibrating state, the piezoelectric composite layer generates current;
the wireless earphone further comprises a shell and a fixing part, wherein one end of the shell is fixed on the fixing part, an acoustic hole is formed in one side, close to the fixing part, of the shell, and the piezoelectric composite layer is correspondingly arranged outside the shell at the acoustic hole;
the fixed part is annular, the vibrating diaphragm is arranged towards the fixed part, and the sound outlet corresponds to a hollow area of the fixed part;
the sound generating device further comprises a lead wire, the lead wire is respectively and electrically connected with the voice coil and the battery, the lead wire is used for communicating the battery with the voice coil and supplying electric energy for vibration of the moving coil unit;
when alternating current flows on the voice coil, driving force is generated according to left hand rule, and meanwhile, the cone drives the vibrating diaphragm to vibrate.
2. The wireless headset of claim 1, wherein the current processing module comprises a rectifying circuit, a filtering circuit, a voltage stabilizing circuit, a differential amplifying circuit, and a power amplifying circuit electrically connected in sequence, the rectifying circuit being electrically connected to the piezoelectric composite layer, and the power amplifying circuit being electrically connected to the battery.
3. The wireless headset of claim 1, wherein the piezoelectric composite layer is composed of an electrodeless piezoelectric ceramic material and an organic polymer resin material.
4. The wireless earphone of claim 1, wherein the moving coil unit comprises an iron frame, a magnet, an iron core, a centering support and a voice coil framework, the vibrating diaphragm is fixed on one side of the iron frame, which is far away from the vibrating diaphragm, is fixed on the magnet, the magnet is annular, the iron core is arranged in an annular space of the magnet, a magnetic gap is formed between the iron core and the magnet, one end of the cone is connected with the vibrating diaphragm, the other end of the cone is connected with the voice coil framework, the voice coil framework surrounds the iron core and is arranged in the magnetic gap, the voice coil is wound on the voice coil framework, and the centering support is connected between the cone and the iron frame.
5. The wireless headset of claim 4, wherein the moving coil unit is disposed within the housing.
6. The wireless headset of claim 5, wherein the diaphragm is disposed coaxially with the fixed portion.
7. The wireless headset of claim 6, wherein the anchor portion is comprised of a foam material.
8. The wireless headset of claim 6, wherein the piezoelectric composite layer is disposed parallel to the diaphragm.
9. The wireless headset of claim 1, wherein the piezoelectric composite layer is attached to the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116103.4A CN112887865B (en) | 2021-01-27 | 2021-01-27 | Wireless earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116103.4A CN112887865B (en) | 2021-01-27 | 2021-01-27 | Wireless earphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112887865A CN112887865A (en) | 2021-06-01 |
| CN112887865B true CN112887865B (en) | 2024-01-05 |
Family
ID=76052890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110116103.4A Active CN112887865B (en) | 2021-01-27 | 2021-01-27 | Wireless earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112887865B (en) |
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| Publication number | Publication date |
|---|---|
| CN112887865A (en) | 2021-06-01 |
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