CN105979449B - Moving coil piezoelectric composite loudspeaker - Google Patents
Moving coil piezoelectric composite loudspeaker Download PDFInfo
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- CN105979449B CN105979449B CN201610474112.XA CN201610474112A CN105979449B CN 105979449 B CN105979449 B CN 105979449B CN 201610474112 A CN201610474112 A CN 201610474112A CN 105979449 B CN105979449 B CN 105979449B
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 claims description 7
- 229910052451 lead zirconate titanate Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 19
- 230000004044 response Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 description 7
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- 239000006185 dispersion Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- 239000002356 single layer Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
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Classifications
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- 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
- H04R9/06—Loudspeakers
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- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The invention relates to the technical field of loudspeakers, in particular to a moving coil piezoelectric composite loudspeaker. The moving coil piezoelectric composite loudspeaker comprises a shell and a support plate, wherein the shell is provided with a sound outlet, the support plate is arranged inside the shell, the support plate divides the shell into a moving coil cavity and a piezoelectric cavity, and the moving coil cavity is communicated with the sound outlet; the piezoelectric actuator is characterized in that a moving coil unit is arranged inside the moving coil cavity, a piezoelectric vibrator is arranged inside the piezoelectric cavity, the supporting plate is provided with a sound guide hole, and the piezoelectric cavity is communicated with the moving coil cavity through the sound guide hole. In the invention, the piezoelectric vibrator is added on the basis of the original moving coil loudspeaker, the sound effect and the tone quality of the moving coil loudspeaker at high frequency are compensated through the piezoelectric vibrator, the moving coil unit and the piezoelectric vibrator are simultaneously vibrated and sounded to form resonance, so that the frequency response range is widened, and the hearing experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of loudspeakers, in particular to a moving coil piezoelectric composite loudspeaker.
Background
A speaker, also called a "horn", is a very common electroacoustic transducer. The speaker emits sound by vibration, thereby changing the pressure of the ambient air. The existing moving-coil loudspeaker has the characteristics of soft sound, good bass effect, low price and the like, and becomes the variety with the largest output in the field of loudspeaker products. However, the loudspeaker has poor sound quality at high frequency, the frequency response of 8KHz of the common moving coil loudspeaker begins to decline, and even the frequency response of the high-end moving coil loudspeaker begins to decline rapidly at 9.5KHz, which affects the hearing experience of users.
In view of this, those skilled in the art need to develop a moving coil piezoelectric composite speaker, which compensates the high-frequency sound effect and sound quality of the moving coil speaker through a piezoelectric vibrator to widen the frequency response range and improve the hearing experience of the user.
Disclosure of Invention
The invention aims to provide a moving coil piezoelectric composite loudspeaker to solve the technical problems that in the prior art, the moving coil loudspeaker is poor in high-frequency tone quality, limited in frequency response width and influenced in auditory experience of a user.
The invention provides a moving coil piezoelectric composite loudspeaker, which comprises a shell and a support plate, wherein the shell is provided with a sound outlet, the support plate is arranged in the shell, the support plate divides the shell into a moving coil cavity and a piezoelectric cavity, and the moving coil cavity is communicated with the sound outlet; the piezoelectric actuator is characterized in that a moving coil unit is arranged inside the moving coil cavity, a piezoelectric vibrator is arranged inside the piezoelectric cavity, the supporting plate is provided with a sound guide hole, and the piezoelectric cavity is communicated with the moving coil cavity through the sound guide hole.
Furthermore, a sound guide pipe is arranged inside the moving coil cavity, the sound guide pipe is fixedly connected with the supporting plate, and the sound guide pipe is communicated with the sound guide hole.
Further, the movable coil unit includes vibration subassembly and magnetic circuit subassembly, the vibration subassembly includes vibrating diaphragm and voice coil loudspeaker voice coil, magnetic circuit subassembly includes magnetic conduction board, magnet and magnetic conduction post, the magnet is the annular, the face of one side of magnetic conduction board with the face fixed connection of backup pad, the face of the opposite side of magnetic conduction board with one side fixed connection of magnet, the basin frame is installed to the opposite side of magnet, the vibrating diaphragm set up in on the basin frame, the magnetic conduction post wears to locate in the magnet, and the magnetic conduction post is fixed in on stating the face of the opposite side of magnetic conduction board, the voice coil loudspeaker voice coil twine in the surface of magnetic conduction post, and the voice coil loudspeaker voice coil with the vibrating diaphragm is connected.
The piezoelectric vibrator comprises a vibrating plate and a piezoelectric sheet, the vibrating plate divides the piezoelectric cavity into a first piezoelectric cavity and a second piezoelectric cavity, and the piezoelectric sheet is fixed on the plate surface of the vibrating plate.
Furthermore, the vibrating plate is provided with a sound discharging hole, and the first piezoelectric cavity is communicated with the second piezoelectric cavity through the sound discharging hole.
Furthermore, the shell is provided with a wire guide port, and the wire guide port is communicated with the first piezoelectric cavity.
Furthermore, the moving coil piezoelectric loudspeaker also comprises a sound cover, the sound cover covers the sound outlet, and the sound cover is fixedly connected with the shell.
Furthermore, the sound cover is provided with a sound scattering hole, and the sound scattering hole is communicated with the moving coil cavity through the sound outlet.
Furthermore, the vibrating plate is made of metal.
Furthermore, the piezoelectric sheet is made of lead zirconate titanate.
According to the moving coil piezoelectric composite loudspeaker, the shell is divided into the moving coil cavity and the piezoelectric cavity through the support plate, the moving coil cavity vibrates and pronounces through the moving coil unit, the bass effect is good, and the sound is soft; the piezoelectric cavity generates sound through vibration of the piezoelectric vibrator, the sound directivity is wide, and the response speed is high; the support plate is provided with a sound guide hole, the piezoelectric cavity is communicated with the moving coil cavity through the sound guide hole, so that sound waves in the piezoelectric cavity can be transmitted into the moving coil cavity through the sound guide hole, the sound waves in the piezoelectric cavity and the moving coil cavity are compounded, and the sound waves are transmitted through the sound outlet, so that the aims of widening the frequency response width, improving the sound effect and the sound quality and improving the hearing experience of a user are fulfilled; meanwhile, the moving coil piezoelectric composite loudspeaker provided by the invention is simple in structure, low in price, small in size and suitable for various application fields.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a cross-sectional view of a moving-coil piezoelectric composite speaker according to an embodiment of the present invention.
Reference numerals:
101-a housing; 102-a support plate; 103-a sound outlet;
104-moving coil cavity; 105-piezoelectric cavity 106-sound guide hole;
107-sound guide tube; 108-a vibrating plate; 109-piezoelectric patches;
110-a first piezoelectric cavity; 111-a second piezoelectric cavity; 112-sound discharge hole;
113-wire guide port; 114-a sound enclosure; 115-sound dispersion holes;
201-a diaphragm; 202-a voice coil; 203-magnetic conductive plate;
204-a magnet; 205-magnetically conductive columns; 206-basin stand.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Fig. 1 is a cross-sectional view of a moving-coil piezoelectric composite speaker according to an embodiment of the present invention; as shown in fig. 1, the moving coil piezoelectric composite speaker provided by the present invention includes a casing 101 and a support plate 102, the casing 101 is provided with a sound outlet 103, the support plate 102 is disposed inside the casing 101, the support plate 102 divides the casing 101 into a moving coil cavity 104 and a piezoelectric cavity 105, and the moving coil cavity 104 is communicated with the sound outlet 103; the moving coil unit is arranged in the moving coil cavity 104, the piezoelectric vibrator is arranged in the piezoelectric cavity 105, the support plate 102 is provided with a sound guide hole 106, and the piezoelectric cavity 105 is communicated with the moving coil cavity 104 through the sound guide hole 106.
A speaker, also called a "horn", is a very common electroacoustic transducer. The speaker emits sound by vibration, thereby changing the pressure of the ambient air. The existing moving-coil loudspeaker has the characteristics of soft sound, good bass effect, low price and the like, and becomes the variety with the largest output in the field of loudspeaker products. However, the loudspeaker has poor sound quality at high frequency, the 8KHz frequency response of the common moving coil loudspeaker begins to decline, and even the high-end moving coil loudspeaker also begins to decline rapidly at 9.5KHz frequency response, which affects the hearing experience of users. At present, a moving-coil loudspeaker compensated by a moving-iron unit is adopted to improve the frequency response width of the loudspeaker, but the loudspeaker is complex in structure, high in price, large in size and greatly limited in application field.
According to the moving coil piezoelectric composite loudspeaker, the shell 101 is divided into the moving coil cavity 104 and the piezoelectric cavity 105 through the support plate 102, the moving coil cavity 104 vibrates and pronounces through the moving coil unit, the bass effect is good, and the sound is soft; the piezoelectric cavity 105 produces sound through vibration of the piezoelectric vibrator, so that the sound directivity is wide and the response speed is high; the support plate 102 is provided with a sound guide hole 106, the piezoelectric cavity 105 is communicated with the moving coil cavity 104 through the sound guide hole 106, so that sound waves in the piezoelectric cavity 105 can be transmitted into the moving coil cavity 104 through the sound guide hole 106, the sound waves in the piezoelectric cavity and the moving coil cavity are compounded, and the sound waves are transmitted through the sound outlet 103, so that the aims of widening the frequency response width, improving the sound effect and the sound quality and improving the hearing experience of a user are fulfilled; meanwhile, the moving coil piezoelectric composite loudspeaker provided by the invention is simple in structure, low in price, small in size and suitable for various application fields.
As shown in fig. 1, in the present invention, a sound guide tube 107 is disposed inside the moving coil cavity 104, the sound guide tube 107 is fixedly connected to the support plate 102, and the sound guide tube 107 is communicated with the sound guide hole 106.
By communicating the sound guide tube 107 with the sound guide hole 106, the sound wave in the piezoelectric chamber 105 can be transmitted into the moving coil chamber 104 through the sound guide tube 107. In the invention, the sound guide pipe 107 can avoid the diffusion of the transmitted sound wave, reduce the loss of the sound wave and provide guarantee for the sound production effect.
In the present invention, the sound guide tube 107 and the support plate 102 are fixedly connected in the following two ways: the first embodiment is that the inner diameter of the sound guide pipe 107 is smaller than the aperture of the sound guide hole 106, the sound guide pipe 107 is arranged in the sound guide hole 106 in a penetrating way, and the outer surface of the pipe wall of the sound guide pipe 107 is fixedly connected with the hole wall of the sound guide hole 106; in the second embodiment, the inner diameter of the sound guide tube 107 is greater than or equal to the aperture of the sound guide hole 106, the end surface of one end of the sound guide tube 107 is fixedly connected with the plate surface of the support plate 102, and the sound guide tube 107 is communicated with the sound guide hole 106. The fixed connection between the sound guide tube 107 and the support plate 102 may be an adhesive connection, a welding connection, or other fixed connection methods as needed.
As shown in fig. 1, in the present invention, the moving coil unit includes a vibration component and a magnetic circuit component, the vibration component includes a vibrating diaphragm 201 and a voice coil 202, the magnetic circuit component includes a magnetic conductive plate 203, a magnet 204 and a magnetic conductive column 205, the magnet 204 is annular, a plate surface of one side of the magnetic conductive plate 203 is fixedly connected with a plate surface of the support plate 102, a plate surface of the other side of the magnetic conductive plate 203 is fixedly connected with one side of the magnet 204, a basin frame 206 is installed on the other side of the magnet 204, the vibrating diaphragm 201 is disposed on the basin frame 206, the magnetic conductive column 205 is inserted into the magnet 204, and the magnetic conductive column 205 is fixed on the plate surface of the other side of the magnetic conductive plate 203, the voice coil 202 is wound on.
The sound production principle of the moving coil unit is as follows: the voice coil of circular telegram atress motion in the magnetic field that magnetic circuit component formed, the motion of voice coil loudspeaker voice coil drives the vibrating diaphragm vibration sound production to make the signal of telecommunication change into the acoustic signal. In the present invention, the magnetic circuit assembly includes a magnetic conductive plate 203, a magnet 204, and a magnetic conductive column 205, a plate surface of one side of the magnetic conductive plate 203 is bonded to a plate surface of the support plate 102, the magnet 204 is used for providing a magnetic field for the voice coil 202, the magnet 204 is annular, one side of the magnet 204 is bonded to a plate surface of the other side of the magnetic conductive plate 203, the magnetic conductive column 205 is inserted into the magnet 204, the magnetic conductive column 205 is bonded to a plate surface of the other side of the magnetic conductive plate 203, and the voice coil 202 is wound around an outer surface of the magnetic conductive column 205, so that the voice coil 202 is located in the. The voice coil 202 is connected with the diaphragm 201, when the voice coil 202 is connected with a wire and a current passes through the voice coil 202, the voice coil 202 is forced to move in a magnetic field, and the movement of the voice coil 202 drives the diaphragm 201 to vibrate to generate sound, so that an electric signal is converted into an acoustic signal. In order to avoid the position deviation of the diaphragm 201 in the vibration process and influence the continuous sound production effect, the moving coil unit further comprises a basin frame 206, the basin frame 206 is installed at the other side of the magnet 204, the diaphragm 201 is arranged on the basin frame 206, and the basin frame 206 supports the diaphragm 201 to prevent the diaphragm 201 from position deviation and influence the sound production effect.
As shown in fig. 1, in the present invention, the piezoelectric vibrator includes a vibration plate 108 and a piezoelectric sheet 109, the vibration plate 108 divides the piezoelectric cavity 105 into a first piezoelectric cavity 110 and a second piezoelectric cavity 111, and the piezoelectric sheet 109 is fixed to a plate surface of the vibration plate 108.
The principle of the sound production of the piezoelectric vibrator is as follows: the piezoelectric sheet 109 can convert electrical energy and mechanical energy into each other, and the piezoelectric sheet 109 has dielectric properties, elasticity, and the like. The piezoelectric sheet 109 is elastically deformed in an electric field, and the vibration plate 108 is driven to vibrate by the elastic deformation of the piezoelectric sheet 109, thereby generating sound. In the present invention, the piezoelectric sheet 109 and the vibrating plate 108 are connected to a lead wire, respectively, and the piezoelectric sheet 109 is energized through the lead wire to deform the piezoelectric sheet 109 under the action of an electric field, thereby vibrating and sounding the vibrating plate 108. The peripheral edge portion of the vibrating plate 108 is bonded to the inner wall of the case 101, the vibrating plate 108 divides the piezoelectric cavity 105 into a first piezoelectric cavity 110 and a second piezoelectric cavity 111, and the piezoelectric sheet 109 is bonded to the plate surface of the vibrating plate 108.
In the present invention, the bonding connection between the piezoelectric sheet 109 and the plate surface of the vibrating plate 108 has the following three embodiments: in the first embodiment, the piezoelectric sheet 109 is disposed inside the second piezoelectric cavity 111, the piezoelectric sheet 109 is bonded to the plate surface on one side of the vibrating plate 108, and the plate surface of the piezoelectric sheet 109 is bonded to the plate surface on one side of the vibrating plate 108; in the second embodiment, the piezoelectric sheet 109 is arranged inside the first piezoelectric cavity 110, the piezoelectric sheet 109 is adhered to the other plate surface of the vibrating plate 108, and the one surface of the piezoelectric sheet 109 is adhered to the other plate surface of the vibrating plate 108; in the third embodiment, the piezoelectric sheet 109 is bonded to both side plate surfaces of the vibrating plate 108, and one surface of the piezoelectric sheet 109 is bonded to the plate surface of the vibrating plate 108. The above three embodiments can be selected according to the needs of the user.
In addition, in the present invention, the piezoelectric sheet 109 may have a single-layer structure, or may have a multi-layer structure, or may have another structure according to the user's requirement.
As shown in fig. 1, in the present invention, the vibrating plate 108 is provided with a sound discharging hole 112, and the first piezoelectric chamber 110 is communicated with the second piezoelectric chamber 111 through the sound discharging hole 112.
Be provided with sound discharging hole 112 on the vibration board 108, the inside sound wave of the inside of second piezoelectric cavity 111 can be carried the inside of first piezoelectric cavity 110 through sound discharging hole 112, so that the inside sound wave of first piezoelectric cavity 110 strengthens, the inside sound wave rethread sound guide tube 107 of the inside of first piezoelectric cavity 110 carries the inside of moving coil cavity 104, compound with the inside sound wave of moving coil cavity 104, thereby compensate the defect that the inside high frequency sound wave intensity of moving coil cavity 104 descends, the inside compound sound wave of moving coil cavity 104 propagates away through sound outlet 103, so as to promote user's hearing experience. In the present invention, a plurality of sound discharging holes 112 are respectively disposed on the vibrating plate 108, so as to prevent the sound wave inside the second piezoelectric cavity 111 from being blocked by the vibrating plate 108 and affecting the intensity of the sound wave in the first piezoelectric cavity 110.
As shown in fig. 1, in the embodiment of the present invention, the housing 101 is provided with a wire port 113, and the wire port 113 is communicated with the first voltage chamber 110.
The moving coil unit and the piezoelectric vibrator provided by the invention vibrate and sound when being electrified, and are connected with the lead. In this embodiment, a lead enters the first piezoelectric cavity 110 through the lead port 113, and is sequentially connected to the vibrating plate 108 and the piezoelectric sheet 109, and when the lead is powered on, the piezoelectric sheet 109 makes sound and elastically deforms under the action of an electric field to drive the vibrating plate 108 to make sound and vibrate, so as to realize sound production.
In addition, in this embodiment, the supporting plate 102 and the magnetic conductive plate 203 are sequentially provided with wire holes, so that the wires are connected to the voice coil 202 through the wire holes, and when the power is turned on, the voice coil 202 is forced to move in the magnetic field provided by the magnet 204, and the diaphragm 201 is driven to vibrate and generate sound.
In this embodiment, the wires are sequentially connected to the vibrating plate 108, the piezoelectric plate 109 and the voice coil 202, so that the vibrating plate 108 and the vibrating diaphragm 201 vibrate and sound at the same time to form a resonance effect, thereby improving the sound effect and the sound quality of the moving coil piezoelectric composite speaker provided by the present invention, and comprehensively improving the hearing experience of a user.
As shown in fig. 1, the moving coil piezoelectric speaker further includes a sound cover 114, the sound cover 114 covers the sound outlet 103, and the sound cover 114 is fixedly connected to the housing 101.
In order to avoid impurities and dust from entering the interior of the moving coil cavity 104 through the sound outlet 103, the moving coil piezoelectric composite speaker provided by the invention comprises the sound cover 114, the sound cover 114 covers the sound outlet 103, sound waves can be transmitted through the sound cover 114, and dust and impurities can be prevented from entering the interior of the moving coil cavity 104, so that the influence on the vibration of the vibrating diaphragm 201 and the vibrating plate 108 caused by the dust or impurities entering the interior of the moving coil cavity 104 and the interior of the piezoelectric cavity 105 is effectively avoided, and the sound effect and the sound quality of the moving coil piezoelectric composite speaker provided by the invention are ensured.
In this embodiment, the fixed connection between the sound cover 114 and the casing 101 may be an adhesive connection, a snap connection, or another fixed connection method according to the needs of the user.
As shown in fig. 1, in the embodiment of the present invention, the sound cover 114 is provided with a sound dispersing hole 115, and the sound dispersing hole 115 is communicated with the moving coil cavity 104 through the sound outlet 103.
In order to make the sound wave inside the moving coil cavity 104 better propagate outwards through the sound cover 114 and make the user obtain better hearing experience, in this embodiment, the sound cover 114 is provided with a sound emission hole 115, and the sound emission hole 115 is communicated with the moving coil cavity 104 through the sound outlet 103. The sound waves inside the moving coil cavity 104 sequentially pass through the sound outlet 103 and the sound dispersing holes 115 to be spread outwards, so that the hearing experience of a user is better.
In order to further enhance the propagation effect of the sound wave, the number of the sound dispersion holes 115 is plural, and the sound wave inside the coil cavity 104 is propagated outward through the plural sound dispersion holes 115, so that the sound quality and sound effect of the sound heard by the user are better.
In the present invention, the material of the vibrating plate 108 is metal.
In order to enhance the vibration effect of the vibrating plate 108 and reduce the deformation of the vibrating plate 108 during the vibration process, the vibrating plate used in the present invention is made of metal. The material of the vibrating plate 108 may be nickel, stainless steel, nickel-cobalt alloy, aluminum, or the like.
In the present invention, the material of the piezoelectric sheet 109 is lead zirconate titanate.
Lead zirconate titanate is a piezoelectric material which is widely applied at present, and the piezoelectric property of the lead zirconate titanate is more excellent than that of other materials. The lead zirconate titanate is a solid solution composed of lead titanate and lead zirconate, has high dielectric constant, the working temperature can reach 250 ℃, and each electromechanical parameter has small change along with external factors such as temperature, time and the like. Lead zirconate titanate is a most commonly used piezoelectric material at present because it is far superior to piezoelectric materials in terms of piezoelectric properties, temperature stability, and the like.
According to the moving coil piezoelectric composite loudspeaker provided by the embodiment of the invention, the piezoelectric vibrator is added on the basis of the original moving coil loudspeaker, and the lead is sequentially connected with the piezoelectric vibrator and the moving coil unit, so that the moving coil unit and the piezoelectric vibrator can simultaneously vibrate and sound to form resonance when the loudspeaker is electrified, thereby greatly improving the tone quality and sound effect of the original moving coil loudspeaker in a high-frequency section, and obviously improving the hearing experience of a user. In addition, the piezoelectric vibrator with simple structure and low price compensates the sound effect of the moving coil type loudspeaker at a high frequency band, so that the cost of the moving coil piezoelectric composite loudspeaker is effectively reduced, the application range of the piezoelectric composite loudspeaker is expanded, and the increase of the sales volume can be effectively promoted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A moving coil piezoelectric composite loudspeaker is characterized in that: the piezoelectric ceramic loudspeaker comprises a shell and a supporting plate, wherein the shell is provided with a sound outlet, the supporting plate is arranged inside the shell, the supporting plate divides the shell into a moving coil cavity and a piezoelectric cavity, and the moving coil cavity is communicated with the sound outlet; a moving coil unit is arranged in the moving coil cavity, a piezoelectric vibrator is arranged in the piezoelectric cavity, a sound guide hole is formed in the supporting plate, and the piezoelectric cavity is communicated with the moving coil cavity through the sound guide hole;
a sound guide pipe is arranged in the moving coil cavity, the sound guide pipe is fixedly connected with the supporting plate, and the sound guide pipe is communicated with the sound guide hole;
the movable coil unit includes vibration subassembly and magnetic circuit subassembly, the vibration subassembly includes vibrating diaphragm and voice coil loudspeaker voice coil, magnetic circuit subassembly includes magnetic conduction board, magnet and magnetic conduction post, the magnet is the annular, the face of one side of magnetic conduction board with the face of backup pad bonds, the face of the opposite side of magnetic conduction board with one side fixed connection of magnet, the basin frame is installed to the opposite side of magnet, the vibrating diaphragm set up in on the basin frame, the magnetic conduction post is worn to locate in the magnet, the magnetic conduction post is fixed in on the face of the opposite side of magnetic conduction board, the voice coil loudspeaker voice coil twines in the surface of magnetic conduction post, and the voice coil loudspeaker voice coil in the vibrating diaphragm is connected.
2. The moving coil piezoelectric compound speaker according to claim 1, wherein: the piezoelectric vibrator comprises a vibrating plate and a piezoelectric sheet, the vibrating plate divides the piezoelectric cavity into a first piezoelectric cavity and a second piezoelectric cavity, and the piezoelectric sheet is fixed on the plate surface of the vibrating plate.
3. The moving coil piezoelectric compound speaker according to claim 2, wherein: the vibrating plate is provided with a sound discharging hole, and the first piezoelectric cavity is communicated with the second piezoelectric cavity through the sound discharging hole.
4. The moving coil piezoelectric compound speaker according to claim 3, wherein: the shell is provided with a wire guide port, and the wire guide port is communicated with the first piezoelectric cavity.
5. The moving coil piezoelectric compound speaker according to claim 4, wherein; the sound cover is covered on the sound outlet and is fixedly connected with the shell.
6. The moving coil piezoelectric compound speaker according to claim 5, wherein: the sound cover is provided with a sound scattering hole, and the sound scattering hole is communicated with the moving coil cavity through the sound outlet.
7. The moving coil piezoelectric compound speaker according to any one of claims 2 to 5, wherein: the vibrating plate is made of metal.
8. The moving-coil piezoelectric compound speaker as claimed in claim 7, wherein: the piezoelectric sheet is made of lead zirconate titanate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610474112.XA CN105979449B (en) | 2016-06-24 | 2016-06-24 | Moving coil piezoelectric composite loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610474112.XA CN105979449B (en) | 2016-06-24 | 2016-06-24 | Moving coil piezoelectric composite loudspeaker |
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| CN105979449B true CN105979449B (en) | 2021-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111741418B (en) * | 2020-07-21 | 2020-12-25 | 山东新港电子科技有限公司 | Miniature vibration sensor |
| CN113810800B (en) * | 2021-09-16 | 2024-01-09 | 维沃移动通信有限公司 | Speaker module, sound adjusting method and device thereof and electronic equipment |
| CN113810832A (en) * | 2021-09-17 | 2021-12-17 | 厦门圣德斯贵电子科技有限公司 | Micro loudspeaker |
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| CN86210358U (en) * | 1986-12-16 | 1987-09-16 | 田国桢 | High-frequency piezoelectrical paper cone formed loudspeaker |
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| US6229901B1 (en) * | 1998-03-05 | 2001-05-08 | Nils Peter Mickelson | Auditory feedback device |
| CN1443433A (en) * | 2000-06-27 | 2003-09-17 | G·A·格仑瑟 | Compact high performance speaker |
| CN201063839Y (en) * | 2007-06-26 | 2008-05-21 | 斯贝克电子（嘉善）有限公司 | Metal sound-guiding tube |
| CN204425650U (en) * | 2014-10-31 | 2015-06-24 | 捷音特科技股份有限公司 | Piezoelectric ceramic double-frequency earphone structure |
| CN204498328U (en) * | 2015-03-20 | 2015-07-22 | 捷音特科技股份有限公司 | Piezoelectric ceramic double frequency bass strengthens earphone |
| CN204633985U (en) * | 2015-05-21 | 2015-09-09 | 深圳市狂热者数码科技有限公司 | A kind of multifunctional headphone of high tone quality |
| CN104936112A (en) * | 2015-07-01 | 2015-09-23 | 深圳精拓创新科技有限公司 | Loudspeaker having dual-membrane structure and driving method |
| CN204721553U (en) * | 2015-05-07 | 2015-10-21 | 珠海市源声电子有限公司 | A kind of higher knot is as the earphone of degree |
| CN204836570U (en) * | 2015-07-01 | 2015-12-02 | 深圳精拓创新科技有限公司 | Speaker of double diaphragm structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210358U (en) * | 1986-12-16 | 1987-09-16 | 田国桢 | High-frequency piezoelectrical paper cone formed loudspeaker |
| CN1054689A (en) * | 1990-03-05 | 1991-09-18 | 洛克威尔国际公司 | The electric driver that is used for the composite type transducer |
| US6229901B1 (en) * | 1998-03-05 | 2001-05-08 | Nils Peter Mickelson | Auditory feedback device |
| CN1443433A (en) * | 2000-06-27 | 2003-09-17 | G·A·格仑瑟 | Compact high performance speaker |
| CN201063839Y (en) * | 2007-06-26 | 2008-05-21 | 斯贝克电子（嘉善）有限公司 | Metal sound-guiding tube |
| CN204425650U (en) * | 2014-10-31 | 2015-06-24 | 捷音特科技股份有限公司 | Piezoelectric ceramic double-frequency earphone structure |
| CN204498328U (en) * | 2015-03-20 | 2015-07-22 | 捷音特科技股份有限公司 | Piezoelectric ceramic double frequency bass strengthens earphone |
| CN204721553U (en) * | 2015-05-07 | 2015-10-21 | 珠海市源声电子有限公司 | A kind of higher knot is as the earphone of degree |
| CN204633985U (en) * | 2015-05-21 | 2015-09-09 | 深圳市狂热者数码科技有限公司 | A kind of multifunctional headphone of high tone quality |
| CN104936112A (en) * | 2015-07-01 | 2015-09-23 | 深圳精拓创新科技有限公司 | Loudspeaker having dual-membrane structure and driving method |
| CN204836570U (en) * | 2015-07-01 | 2015-12-02 | 深圳精拓创新科技有限公司 | Speaker of double diaphragm structure |
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| CN105979449A (en) | 2016-09-28 |
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