WO2020181890A1 - 双面微型发声装置和电子产品 - Google Patents

双面微型发声装置和电子产品 Download PDF

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Publication number
WO2020181890A1
WO2020181890A1 PCT/CN2019/129724 CN2019129724W WO2020181890A1 WO 2020181890 A1 WO2020181890 A1 WO 2020181890A1 CN 2019129724 W CN2019129724 W CN 2019129724W WO 2020181890 A1 WO2020181890 A1 WO 2020181890A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
centering support
double
diaphragm
support piece
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PCT/CN2019/129724
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English (en)
French (fr)
Inventor
王兴龙
马学敏
葛连山
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歌尔股份有限公司
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Publication of WO2020181890A1 publication Critical patent/WO2020181890A1/zh

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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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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
    • 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
    • H04R9/025—Magnetic circuit
    • 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

Definitions

  • the present invention belongs to the technical field of electroacoustic energy conversion. Specifically, the present invention relates to a double-sided micro-sounding device.
  • the sound generating device is an important electro-acoustic transducer component in consumer electronic products, which is widely used as speakers, earpieces, earphones, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of sound generating devices is also an inevitable trend.
  • the performance is generally improved by increasing the vibration area and working amplitude of the sound generating device.
  • the increase of the vibration area will increase the size of the product and affect the application of the whole machine.
  • a further increase in the working amplitude will bring about various quality problems.
  • An object of the present invention is to provide an improved double-sided micro-sounding device.
  • a double-sided miniature sound emitting device including:
  • the first vibrating component includes a first diaphragm, a first voice coil, and a first centering support piece, the first diaphragm having a first folding ring, and the first centering support piece Having a first cantilever, and the first centering support piece is connected to one side surface of the first diaphragm;
  • the second vibration component includes a second diaphragm, a second voice coil and a second centering support plate, the second vibration diaphragm has a second folding ring, the second centering support plate Having a second cantilever, and the second centering support piece is connected to one side surface of the second diaphragm;
  • a magnetic circuit system the magnetic circuit system includes a central magnetic part and a side magnetic part, and a magnetic gap is formed between the central magnetic part and the side magnetic part;
  • the first vibration component and the second vibration component are respectively arranged on the upper and lower sides of the magnetic circuit system, and both the first voice coil and the second voice coil extend into the magnetic gap.
  • the first vibrating component includes a first reinforcing member, the first reinforcing member is disposed on the first centering support plate, and the first reinforcing member is located on the side of the first diaphragm. Central region;
  • the second vibrating assembly includes a second reinforcing member, the second reinforcing member is disposed on the second centering support piece, and the second reinforcing member is located in the central area of the second diaphragm.
  • the middle regions of the first reinforcement member and the second reinforcement member are provided with protrusions or recesses extending in the direction of the magnetic circuit system.
  • the first vibrating component includes a first reflexed ring member, the first reflexed ring member is connected to a surface of the first centering support that is away from the first diaphragm, and the The bending direction of the first anti-folding ring is opposite to the bending direction of the first folding ring, and the first cantilever is enclosed between the first anti-folding ring and the first folding ring.
  • the second vibrating component includes a second reflexed ring member, the second reflexed ring member is connected to a surface of the second centering support that is away from the second diaphragm, the The bending direction of the second folded ring is opposite to the bending direction of the second folded ring, and the second cantilever is enclosed between the second folded ring and the second folded ring.
  • the magnetic gap, the first voice coil, and the second voice coil are in a rectangular shape, and each of the first voice coil and the second voice coil has a pair of long sides and a pair of short sides;
  • the first centering support piece has a first fixed area and a first floating area, the first voice coil is relatively fixed to the first floating area, and the first cantilever is connected to the first fixed area and the first floating area. Between a floating zone, the first centering support piece matches the shape of the first voice coil, and at least two first centering support pieces are arranged on the long side corresponding to the first voice coil First cantilever
  • the second centering support piece has a second fixed area and a second floating area, the second voice coil is relatively fixed to the second floating area, and the second cantilever is connected to the second fixed area and the second floating area. Between the two floating regions, the second centering support piece matches the shape of the second voice coil, and at least two second centering support pieces are arranged on the long side corresponding to the second voice coil The second cantilever.
  • the first centering support piece is provided with one or two first cantilevers at a short side corresponding to the first voice coil;
  • the second centering support piece is configured with one or two second cantilevers at the short side corresponding to the second voice coil.
  • the central magnetic part is a central magnet
  • the side magnetic parts are formed by side magnetic conductive plates
  • the side magnetic parts are provided at least on the periphery of two symmetrical side walls of the central magnet.
  • the central magnetic portion is a central magnet
  • the side magnetic portion includes a pair of two bar-shaped side magnets, and the two bar-shaped side magnets are respectively arranged on two symmetrical sides of the center magnet The wall periphery.
  • the side magnet portion includes four bar-shaped side magnets, the four bar-shaped side magnets are paired in pairs, and the two pairs of the bar-shaped side magnets are arranged around the center magnet in turn.
  • a through hole is opened on the central magnetic part, and the through hole communicates the first vibration component with the second vibration component.
  • the present invention also provides an electronic product, which includes:
  • the double-sided micro-sound device is provided in the product body, and the double-sided micro-sound device is configured to generate sound through the vibration of the first vibration component and the second vibration component.
  • One technical effect of the present invention is that the vibration stability of the sound generating device can be improved.
  • Figure 1 is a schematic diagram of the overall structure of a double-sided micro-sounding device provided by the present invention
  • Figure 2 is an exploded view of parts of the double-sided micro-sounding device provided by the present invention.
  • FIG. 3 is a schematic cross-sectional view along the long axis of the double-sided micro-sounding device provided by the present invention.
  • FIG. 4 is a schematic cross-sectional view of the double-sided micro-sounding device provided by the present invention along the short axis;
  • Figure 5 is an exploded view of parts of the first vibration assembly provided by the present invention.
  • FIG. 6 is a partial cross-sectional view of another double-sided sound emitting device provided by the present invention along the long axis;
  • Figure 7 is a schematic structural view of a centering support provided by the present invention.
  • Figure 8 is a schematic structural view of another centering support provided by the present invention.
  • Fig. 9 is a schematic cross-sectional view along the short axis of another double-sided micro-sounding device provided by the present invention.
  • the invention provides an improved double-sided miniature sounding device.
  • the double-sided miniature sounding device includes two sets of vibration components, which respectively transmit sound from the upper and lower sides of the sounding device, so as to improve the acoustic performance of the sound produced by the sounding device.
  • the double-sided micro-sounding device is suitable for different electronic products and has a wider application range. The use of double-sided sound can also reduce the reliability risk of electronic products.
  • the double-sided micro-sounding device includes a first vibration component and a second vibration component.
  • the first vibration assembly includes a first diaphragm 11, a first voice coil 12, and a first centering support piece 13, as shown in Figs. 2-5.
  • the first diaphragm 11 has a first folding ring 111, and the folding ring is bent to one side of the plane where the first diaphragm 11 is located.
  • the first folding ring 111 has a ring-shaped structure, and the part in the middle of the first folding ring 111, that is, the part surrounded by the first folding ring 111 can be relative to the first folding ring 111.
  • the peripheral part of the folding ring 111 floats up and down, generating vibration.
  • the first folding ring 111 is used to provide elastic deformation capability between the inner and outer regions of the first diaphragm 11.
  • the first centering support piece 13 has a first cantilever 132, a first fixed area 131 and a first floating area 133.
  • the first centering support piece 13 is arranged on one side surface of the first diaphragm 11.
  • the first fixed area 131 corresponds to the peripheral area of the first diaphragm 11
  • the first floating area 133 corresponds to the central area of the first diaphragm 11, that is, is surrounded by the first folding ring 111.
  • the first floating area 133 can float up and down and vibrate relative to the first fixed area 131.
  • the first folding ring 111 forms a part of a recessed area due to bending, and the first cantilever 132 corresponds to the position of the recessed area of the first folding ring 111.
  • the first voice coil 12 is arranged on a side of the first positioning piece away from the first diaphragm 11. As shown in FIGS. 3 and 4, the first centering support piece 13 is sandwiched between the first diaphragm 11 and the first voice coil 12.
  • the second vibration assembly includes a second diaphragm 21, a second voice coil 22 and a second centering support piece 23.
  • Figures 2-4 show the assembly position of the second vibration component.
  • the second diaphragm 21 has similar structural features to the first diaphragm 11
  • the second voice coil 22 has similar structural features to the first voice coil 12
  • the second centering support piece 23 has the same structure as the first centering support.
  • Film 13 has similar structural features.
  • the second diaphragm 21 has a second folding ring 211, and the second centering support piece has a second cantilever 232, a second fixed area 231, and a second floating area 233.
  • the second centering support piece It is connected to one side surface of the second diaphragm 21.
  • the second cantilever 232 corresponds to the position of the recessed area of the second folding ring 211.
  • the second cantilever 232 is connected between the second fixed area 231 and the second floating area 233.
  • the second voice coil 22 is located on a side of the second centering branch away from the second diaphragm 21.
  • the magnetic circuit system includes a central magnetic portion 31 and a side magnetic portion 32.
  • the side magnetic portion 32 is arranged on the periphery of the central magnetic portion 31 and between the central magnetic portion 31 and the side magnetic portion 32 A magnetic gap is formed.
  • the present invention does not limit the specific structure of the magnetic circuit system, for example, single magnetic circuit, three magnetic circuit, five magnetic circuit, etc. can be adopted.
  • the first vibration component and the second vibration component are respectively arranged on the upper and lower sides of the magnetic circuit system, as shown in FIGS. 2-4.
  • the first vibration component and the second vibration component share a magnetic circuit system.
  • the first voice coil 12 and the second voice coil 22 respectively extend into the magnetic gap from the upper and lower ends of the magnetic gap.
  • the first folding ring 111 and the second folding ring 211 are respectively bent in opposite directions. For example, as shown in FIG. 3, the first folding ring 111 is bent upward, and the second folding ring 211 is bent downward.
  • the technical effect of the present invention is that the centering support piece can provide a good stable vibration function for the two voice coils and the diaphragm in the double-sided micro-sound device.
  • the use of a double-sided micro-sounding device can meet the design trend of miniaturization and miniaturization of electronic products.
  • the two vibration components can meet performance requirements such as loudness and complex sound effects.
  • the use of a centering support plate in a double-sided micro-sounding device with a smaller structural size can effectively improve the ability of the vibration component to resist swing, polarization, and resist external vibration interference. So that the product can achieve reliable, intelligent co-amplification that maximizes the application effect, and optimizes the performance of electronic products.
  • the traditional sound device may also cause the vibration of the whole electronic product when it is working, which seriously affects the use effect of the whole electronic product.
  • the double-sided micro-sounding device provided by the present invention has the first and second vibrating components arranged on the upper and lower sides of the sounding device in opposite directions, thereby providing application conditions for reverse vibration and sounding. In practical applications, the use of reverse vibration can effectively offset the vibration of the entire electronic product.
  • the design scheme of the present invention adopts the method of fixed connection of the diaphragm, the centering support piece and the end surface of the voice coil to connect the vibration component, the processing technology is simple and the reliability is higher.
  • the material of the first diaphragm and the second diaphragm can be thermoplastic elastomer.
  • the thermoplastic elastomer can form a more stable fixed connection relationship with the centering support piece.
  • the diaphragm formed of thermoplastic elastomer can better absorb the cushioning effect generated by the centering support piece, thereby improving the vibration stability and balance of the vibration component.
  • the first vibrating assembly further includes a first reinforcing member 14, the first reinforcing member 14 is disposed on the first centering support plate 13, and the first reinforcing member 14 is located The central area of the first diaphragm 11 is shown in Figs. 2-5.
  • the second vibrating assembly may also include a second reinforcing member 24, the second reinforcing member 24 is disposed on the second centering support piece 23, and the second reinforcing member 24 is located in the center. The central area of the second diaphragm 21 is described.
  • the first reinforcing member 14 and the second reinforcing member 24 can be formed by stamping and other forming processes, thereby forming protrusions, depressions 141, 241 and other structures in the central area of the first reinforcing member 14 and the second reinforcing member 24 .
  • This structure can further improve the structural strength of the reinforcing member, thereby reducing the possibility of polarization of the diaphragm.
  • the reinforcement provided on the diaphragm is used to improve the rigidity and strength of the central area of the diaphragm, so that when the diaphragm is vibrated under force, the central area will not bend, thereby reducing the possibility of polarization of the diaphragm, such as Shown in Figure 9.
  • the first vibrating assembly further includes a first reflex ring 15.
  • the first folded ring 15 has a bending structure similar to the first folded ring 111 on the first diaphragm 11. The shape and size of the first folded ring 15 and the first folded ring 111 match.
  • the first inverted ring 15 is connected to the surface of the first centering support piece 13 away from the first diaphragm 11.
  • the bending direction of the first folded ring 15 is opposite to the bending direction of the first folded ring 111.
  • the first cantilever of the first centering support piece 13 is enclosed in the area between the first reflexed ring 15 and the first folded ring 111, as shown in FIG. 6.
  • the first reflex ring can further provide the first voice coil with functions of suppressing polarization, balancing and stabilizing vibration.
  • the first reflex ring and the first centering support piece can work together to provide the first voice coil with anti-sway and polarization capabilities.
  • the second vibration assembly may also include a second reflex ring 25.
  • the structure and shape of the second folding ring 25 and the second folding ring 211 of the second diaphragm 21 match.
  • the second reflex ring member 25 plays the same role in the second vibration assembly as the first reflex ring member 15.
  • the second reflexed ring 25 is connected to the surface of the second centering support piece away from the second diaphragm 21, and the bending direction of the second reflexed ring 25 is the same as that of the second The bending direction of the folding ring 211 is opposite, and the second cantilever 232 is enclosed between the second reflexed ring 25 and the second folding ring 211.
  • the first voice coil 12 may not be directly connected to the first centering support piece 13, and it may be connected to the first reflex ring 15.
  • the second voice coil 22 can be connected to the second reflex ring 25.
  • the invention does not limit the connection form of the voice coil and the centering support piece.
  • the double-sided micro-sounding device may have a rectangular shape.
  • the folded ring portion of the voice coil and the diaphragm may have a rounded structure at the corners of the double-sided micro sounding device.
  • Each of the first voice coil 12 and the second voice coil 22 may have a pair of long sides and a pair of short sides.
  • the shape of the first centering piece matches the shape of the first voice coil 12, and both may have a rectangular structure with rounded corners.
  • the first centering support piece 13 is provided with at least two first cantilevers 132 on the long side corresponding to the first voice coil 12. Since the first centering support piece 13 has a relatively long distance at the position corresponding to the long side, the provision of multiple first cantilevers 132 can make the first centering support piece have more stable structural reliability and better
  • the first voice coil 12 is provided with a polarization suppression effect.
  • the first centering support piece 13 is provided with two first cantilevers 132 at positions corresponding to the long sides.
  • the first centering support piece 13 is provided with three first cantilevers 132 at positions corresponding to the long sides.
  • the present invention does not impose strict restrictions on the shape and number of the first cantilevers, and different numbers of first cantilevers can be provided according to actual application requirements.
  • multiple second cantilevers 232 may also be provided on the second centering support piece 23.
  • the second centering support piece 23 is provided with at least two second cantilevers 232 on the long side corresponding to the second voice coil 22.
  • the second centering support piece 23 may adopt the structure shown in FIGS. 7 and 8.
  • the first centering support piece 13 and the second centering support piece 23 may be provided with one or two cantilevers corresponding to the short sides of the voice coil.
  • the first centering support piece 13 is provided with a first cantilever 132 corresponding to the short side of the first voice coil 12. Disposing fewer cantilevers in a relatively short area of the centering support can ensure the effect of suppressing polarization.
  • the first cantilevers 132 on the first centering piece 13 corresponding to the long sides of the first voice coil 12 are parallel to each other, and the three first cantilevers 132 on the same side extend in parallel.
  • the first cantilever 132 on the first centering support piece 13 corresponding to the long side of the first voice coil 12 may extend in the opposite direction.
  • the first centering support piece 13 has two first cantilevers 132 on the corresponding long sides, and two adjacent first cantilever arms 132 extend in opposite directions, so that the first cantilever
  • the fixed center support piece 13 provides a stronger balance force in a certain area. This design can better provide a balanced force to the first diaphragm and the first voice coil that are locally unevenly stressed. In other embodiments, for example, when there are three first cantilevers corresponding to the long sides, two adjacent first cantilevers may extend in opposite directions.
  • the second centering support piece may also be arranged in the same manner as the second cantilever corresponding to the second voice coil.
  • the double-sided micro-sounding device provided by the present invention may adopt a single magnet single magnetic circuit magnetic circuit system, or a three magnet or five magnet multi-magnetic circuit magnetic circuit system.
  • the central magnetic portion 31 of the magnetic circuit system may be a central magnet
  • the side magnetic portion 32 is composed of magnetic conductive parts such as side magnetic conductive plates and bent side walls on the basin frame.
  • Such side magnet portions 32 are arranged at least on the outer periphery of the two symmetrical side walls of the central magnet, so that a magnetic gap can be formed on at least two sides of the central magnet, thereby driving the voice coil to vibrate.
  • the advantage of this embodiment is that it saves space and the magnet parts used.
  • the central magnetic portion 31 may be a central magnet
  • the side magnetic portion 32 includes a pair of two bar-shaped side magnets, and the two bar-shaped side magnets are respectively arranged on two of the center magnets.
  • the periphery of the symmetrical side wall In this way, a magnetic gap can also be formed on at least two sides of the central magnet to drive the voice coil.
  • the side magnet part includes four bar side magnets, the four bar side magnets are paired by two, and the two pairs of bar side magnets are respectively arranged on the two pairs of symmetrical sides of the center magnet.
  • a through hole 311 may be opened on the central magnetic portion 31, and the through hole 311 is formed between the first diaphragm 11 of the first vibration component and the second diaphragm 21 of the second vibration component. Connected, as shown in Figure 9.
  • the through hole 311 can improve the air flow space inside the double-sided micro-sound device, reduce the influence of air pressure and air flow on the diaphragm and the voice coil, thereby reducing the possibility of polarization.
  • the reinforcing member may be formed with protrusions or depressions, as described above.
  • the through hole 311 may correspond to the position of the protrusion or depression, as shown in FIG. 9. This embodiment can better reduce the influence of airflow and air pressure.
  • the present invention also provides an electronic product, which includes a product main body and the above-mentioned double-sided micro-sounding device.
  • the double-sided micro-sounding device is provided in the product body, and the double-sided micro-sounding device is configured to generate sound through the vibration of the first vibration component and the second vibration component.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本发明涉及一种双面微型发声装置和电子产品。该双面微型发声装置包括：第一振动组件，第一振动组件包括第一振膜、第一音圈以及第一定心支片，第一振膜上具有第一折环，第一定心支片上具有第一悬臂，第一定心支片连接在第一振膜的一侧表面上；第二振动组件，第二振动组件包括第二振膜、第二音圈以及第二定心支片，第二振膜上具有第二折环，第二定心支片上具有第二悬臂，第二定心支片连接在第二振膜的一侧表面上；磁路系统；第一振动组件和第二振动组件分别设置在磁路系统的上下两侧，第一音圈和第二音圈均伸入磁间隙中。

Description

双面微型发声装置和电子产品 技术领域
本发明属于电声换能技术领域，具体地，本发明涉及一种双面微型发声装置。
背景技术
近年来，消费类电子产品得到了快速的发展，智能手机、平板电脑、VR设备等电子产品得到消费者的普遍认可，并且得到了较为广泛的应用。发声装置是消费类电子产品中重要的电声换能部件，其作为扬声器、听筒、耳机等得到广泛的应用。随着电子产品的性能改进，有关发声装置的声学性能的改进也是必然的趋势。
在现有的发声装置中，普遍通过增大发声装置振动面积和工作振幅的方式进行性能提升。但振动面积增大会导致产品尺寸增大，影响整机端应用。而且，工作振幅进一步增大会带来各方面品质问题。
另一方面，随着声学技术的发展，一些高要求的声学效果已经无法通过现有的发声装置实现。
发明内容
本发明的一个目的是提供一种改进的双面微型发声装置。
根据本发明的一个方面提供了一种双面微型发声装置，包括：
第一振动组件，所述第一振动组件包括第一振膜、第一音圈以及第一定心支片，所述第一振膜上具有第一折环，所述第一定心支片上具有第一悬臂，所述第一定心支片连接在所述第一振膜的一侧表面上；
第二振动组件，所述第二振动组件包括第二振膜、第二音圈以及第二定心支片，所述第二振膜上具有第二折环，所述第二定心支片上具有第二悬臂，所述第二定心支片连接在所述第二振膜的一侧表面上；
磁路系统，所述磁路系统包括中心磁部和边磁部，所述中心磁部与边磁部之间形成有磁间隙；
所述第一振动组件和第二振动组件分别设置在所述磁路系统的上下两侧，所述第一音圈和第二音圈均伸入所述磁间隙中。
可选地，所述第一振动组件包括第一补强件，所述第一补强件设置在所述第一定心支片上，所述第一补强件位于所述第一振膜的中心区域；
所述第二振动组件包括第二补强件，所述第二补强件设置在所述第二定心支片上，所述第二补强件位于所述第二振膜的中心区域。
可选地，所述第一补强件、第二补强件的中部区域设置有朝向磁路系统方向延伸的凸起或者凹陷。
可选地，所述第一振动组件包括第一反折环件，所述第一反折环件连接在所述第一定心支片的远离所述第一振膜的表面上，所述第一反折环件的弯折方向与所述第一折环的弯折方向相反，所述第一悬臂被包围在所述第一反折环件与第一折环之间。
可选地，所述第二振动组件包括第二反折环件，所述第二反折环件连接在所述第二定心支片的远离所述第二振膜的表面上，所述第二反折环件的弯折方向与所述第二折环的弯折方向相反，所述第二悬臂被包围在所述第二反折环件与第二折环之间。
可选地，所述磁间隙、第一音圈以及第二音圈呈矩形形状，所述第一音圈和第二音圈均具有一对长边和一对短边；
所述第一定心支片具有第一固定区和第一浮动区，所述第一音圈与所述第一浮动区相对固定，所述第一悬臂连接在所述第一固定区和第一浮动区之间，所述第一定心支片与所述第一音圈的形状相匹配，所述第一定心支片在对应于第一音圈的长边处配置有至少两条第一悬臂；
所述第二定心支片具有第二固定区和第二浮动区，所述第二音圈与所述第二浮动区相对固定，所述第二悬臂连接在所述第二固定区和第二浮动区之间，所述第二定心支片与所述第二音圈的形状相匹配，所述第二定心支片在对应于第二音圈的长边处配置有至少两条第二悬臂。
可选地，所述第一定心支片在对应于第一音圈的短边处配置有一或两 条第一悬臂；
所述第二定心支片在对应于第二音圈的短边处配置有一或两条第二悬臂。
可选地，所述中心磁部为中心磁铁，所述边磁部采用边导磁板构成，至少在所述中心磁铁的对称的两个侧壁外围设置有所述边磁部。
可选地，所述中心磁部为中心磁铁，所述边磁部包括成对的两支条形边磁铁，两支所述条形边磁铁分别设置在所述中心磁铁的两个对称的侧壁外围。
可选地，所述边磁部包括四支条形边磁铁，四支所述条形边磁铁两两成对，两对所述条形边磁铁依次环绕设置在所述中心磁铁周围。
可选地，所述中心磁部上开设有通孔，所述通孔将所述第一振动组件与第二振动组件连通。
本发明还提供了一种电子产品，该电子产品包括：
产品主体；
上述双面微型发声装置，所述双面微型发声装置设置在所述产品主体中，所述双面微型发声装置被配置为能通过第一振动组件和第二振动组件的振动产生声音。
本发明的一个技术效果在于，可以提升发声装置的振动稳定性。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本发明的实施例，并且连同说明书一起用于解释本发明的原理。
图1是本发明提供的双面微型发声装置的整体结构示意图；
图2是本发明提供的双面微型发声装置的零件爆炸图；
图3是本发明提供的双面微型发声装置沿长轴的剖视示意图；
图4是本发明提供的双面微型发声装置沿短轴的剖视示意图；
图5是本发明提供的第一振动组件的零件爆炸图；
图6是本发明提供的另一种双面发声装置沿长轴的局部剖视示意图；
图7是本发明提供的一种定心支片的结构示意图；
图8是本发明提供的另一种定心支片的结构示意图；
图9是本发明提供的另一种双面微型发声装置沿短轴的剖视示意图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
本发明提供了一种改进的双面微型发声装置。如图1所示，双面微型发声装置中包括两套振动组件，两套振动组件分别从发声装置的上下两侧向外传出声音，从而提高发声装置所能产生的声音的声学性能。这种双面微型发声装置适用于不同的电子产品，并且应用范围更广。采用双面发声的特点也能够降低电子产品的可靠性风险。
所述双面微型发声装置包括了第一振动组件和第二振动组件。
所述第一振动组件包括第一振膜11、第一音圈12以及第一定心支片13，如图2-5所示。所述第一振膜11上具有第一折环111，所述折环向第一振膜11所在的平面的一侧弯折。如图5所示，所述第一折环111呈环状结构，而在第一折环111中间的部分，也即被所述第一折环111环绕的部 分是能够相对于所述第一折环111外围的部分上下浮动，产生振动。所述第一折环111则用于在第一振膜11的内外区域之间提供弹性形变的能力。如图5所示，所述第一定心支片13上具有第一悬臂132、第一固定区131和第一浮动区133。如图3、4所示，所述第一定心支片13设置在所述第一振膜11的一侧表面上。所述第一固定区131对应于所述第一振膜11的外围区域，所述第一浮动区133对应于所述第一振膜11的中心区域，即被所述第一折环111所环绕的部分。所述第一浮动区133相对于所述第一固定区131能够上下浮动、振动。如图3、4所示，所述第一折环111因为弯折而形成了一部分凹陷区域，所述第一悬臂132则与所述第一折环111的凹陷区域的位置对应。所述第一音圈12则设置在所述第一定位支片的远离所述第一振膜11的一侧。如图3、4所示，所述第一定心支片13夹在所述第一振膜11和第一音圈12之间。
所述第二振动组件包括第二振膜21、第二音圈22以及第二定心支片23。图2-4示出了第二振动组件的装配位置。第二振膜21具有与第一振膜11相似的结构特点，第二音圈22具有与第一音圈12相似的结构特点，所述第二定心支片23具有与第一定心支片13相似的结构特点。
所述第二振膜21上具有第二折环211，所述第二定心支片上则具有第二悬臂232、第二固定区231、第二浮动区233，所述第二定心支片连接在所述第二振膜21的一侧表面上。所述第二悬臂232与所述第二折环211的凹陷区域的位置相对应。第二悬臂232连接在所述第二固定区231和第二浮动区233之间。所述第二音圈22位于所述第二定心支片的远离所述第二振膜21的一侧。
所述磁路系统中包括了中心磁部31和边磁部32，所述边磁部32设置在所述中心磁部31的外围，所述中心磁部31与所述边磁部32之间形成有磁间隙。本发明并不限制所述磁路系统的具体结构形式，例如可以采用单磁路、三磁路、五磁路等方式。
所述第一振动组件和第二振动组件分别设置在所述磁路系统的上下两侧，如图2-4所示。第一振动组件和第二振动组件共用一个磁路系统。所述第一音圈12和第二音圈22分别从所述磁间隙的上下两端伸入至所述 磁间隙中。所述第一折环111和第二折环211分别向相反的方向弯折，例如图3所示的，第一折环111向上弯折，第二折环211则向下弯折。
本发明的技术效果在于，定心支片能够在双面微型发声装置中为两个音圈、振膜提供良好的稳定振动的作用。采用双面微型发声装置一方面能够满足电子产品小型化、微型化的设计趋势。另一方面满足声学性能逐渐提高的性能要求，两个振动组件能够满足响度、复杂声音效果等性能需求。进一步地，在结构尺寸较小的双面微型发声装置中采用定心支片，能够有效提升振动组件抗摇摆、偏振、抵御外界振动干扰的能力。从而使产品能够实现可靠的、最大化应用效果的智能共放，将电子产品的性能最优化。
传统的发声装置在工作时还有可能造成电子产品整机出现振动现象，严重影响电子产品整机的使用效果。而本发明提供的双面微型发声装置由于使第一、第二振动组件反向设置于发声装置的上下两侧，从而为反向振动发声提供了应用条件。在实际应用中，采用反向振动能够有效抵消掉电子产品整机振动的问题。
在实际的装配、加工工艺中，本发明的设计方案采用振膜、定心支片与音圈的端面固定连接的方式进行振动组件的连接，加工工艺简单，可靠性更高。
所述第一振膜、第二振膜的材料可选为热塑性弹性体。热塑性弹性体能够与定心支片形成更稳定的固定连接关系。而且，由热塑性弹性体形成的振膜能够更好的吸收由定心支片产生的缓冲作用，进而提高振动组件的振动稳定性、平衡性。
可选地，所述第一振动组件还包括第一补强件14，所述第一补强件14设置在所述第一定心支片13上，所述第一补强件14位于所述第一振膜11的中心区域，如图2-5所示。类似地，所述第二振动组件也可以包括第二补强件24，所述第二补强件24设置在所述第二定心支片23上，所述第二补强件24位于所述第二振膜21的中心区域。
所述第一补强件14和第二补强件24可以采用冲压等成型工艺，从而在第一补强件14、第二补强件24的中心区域形成凸起、凹陷141、241等结构。这种结构可以进一步提高补强件的结构强度，从而降低振膜发生偏 振的可能性。
设置在振膜上的补强件用于提高振膜中心区域的刚性和强度，从而使得振膜在受力振动时，中心区域不会发生弯折，进而降低振膜发生偏振的可能性，如图9所示。
可选地，如图6所示，所述第一振动组件还包括了第一反折环件15。所述第一反折环件15具有与所述第一振膜11上的第一折环111相似的弯折结构。所述第一反折环件15与所述第一折环111的形状、尺寸相匹配。所述第一反折环件15连接在所述第一定心支片13的远离所述第一振膜11的表面上。所述第一反折环件15的弯折方向与所述第一折环111的弯折方向相反。所述第一定心支片13的第悬臂被包围在所述第一反折环件15与第一折环111之间的区域中，如图6所示。
所述第一反折环件能够进一步地为第一音圈提供抑制偏振，平衡、稳定振动的作用。通过这种设计方案，第一反折环和第一定心支片能够共同作用为第一音圈提供抗摇摆、偏振的能力。
可选地，如图6所示，所述第二振动组件中也可以还包括第二反折环件25。所述第二反折环件25与所述第二振膜21的第二折环211的结构、形状相匹配。所述第二反折环件25在第二振动组件中起到的作用与所述第一反折环件15的作用相同。所述第二反折环件25连接在所述第二定心支片的远离所述第二振膜21的表面上，所述第二反折环件25的弯折方向与所述第二折环211的弯折方向相反，所述第二悬臂232被包围在所述第二反折环件25与第二折环211之间。
在如图6所示的实施方式中，所述第一音圈12可以不直接连接在所述第一定心支片13上，其可以连接在所述第一反折环件15上。相应地，所述第二音圈22可以连接在所述第二反折环件25上。本发明并不对音圈与定心支片的连接形式进行限制。
可选地，如图1、2所示，所述双面微型发声装置可以呈矩形形状。音圈、振膜的折环部在双面微型发声装置的边角位置可以具有圆角结构。所述第一音圈12、第二音圈22均可以具有一对长边和一对短边。
可选地，所述第一定心支片的形状与所述第一音圈12的形状相匹配， 均可以呈具有圆角的矩形结构。所述第一定心支片13在对应于所述第一音圈12的长边处配置有至少两条第一悬臂132。由于第一定心支片13在对应长边的位置处具有较长的距离，所以设置多条第一悬臂132能够使第一定心支片具有更稳定的结构可靠性，也能够更好的为第一音圈12提供抑制偏振的作用。在如图7所示的实施方式中，所述第一定心支片13在对应于长边的位置处设置有两条所述第一悬臂132。在如图8所示的实施方式中，所述第一定心支片13在对应于长边的位置处设置有三条所述第一悬臂132。
本发明并不对所述第一悬臂的形状、数量做严格的限制，可以根据实际应用的需要设置不同数量的第一悬臂。
可选地，与所述第一定心支片类似的，所述第二定心支片23上也可以设置有多条第二悬臂232。所述第二定心支片23在对应于第二音圈22的长边处配置有至少两条第二悬臂232。所述第二定心支片23可以采用如图7、8所示的结构。
可选地，所述第一定心支片13和第二定心支片23在对应于音圈的短边处可以配置有一条或两条悬臂。在如图7、8所示的实施方式中，第一定心支片13在对应第一音圈12的短边处配置有一条第一悬臂132。在定心支片的相对较短的区域配置较少的悬臂既可以保证抑制偏振的效果。
可选地，如图8所示，第一定心支片13上对应于第一音圈12的长边处的第一悬臂132相互平行，同一侧的三条第一悬臂132以平行的方式延伸，能够使第一定心支片表现出更均匀的力学性能，从而适用于对受力均匀的第一音圈和第一振膜提供抑制偏振的作用力。
可选地，如图7所示，所述第一定心支片13上对应于第一音圈12的长边处的第一悬臂132可以向相反的方向延伸。在图7所示的实施方式中，第一定心支片13在对应长边处具有两条第一悬臂132，相邻的两条所述第一悬臂132向相反的方向延伸，从而使第一定心支片13在某一区域提供更强的平衡作用力。这种设计能够更好的对局部受力不均匀的第一振膜、第一音圈提供平衡作用力。在其它实施方式中，例如对应长边设置有三条第一悬臂的情况下，相邻的两条第一悬臂可以向相反的方向延伸。
可选地，与上述第一定心支片的情况相似地，所述第二定心支片也可以对应于第二音圈以相同的方式布置所述第二悬臂。
可选地，本发明提供的双面微型发声装置可以采用单磁铁的单磁路磁路系统，也可以采用三磁铁、五磁铁的多磁路磁路系统。
例如，所述磁路系统的中心磁部31可以为中心磁铁，而所述边磁部32则采用边导磁板、盆架上弯折的侧壁等导磁部件构成。这种边磁部32至少设置在所述中心磁铁的两个对称的侧壁的外围，这样就可以在所述中心磁铁的至少两侧形成磁间隙，进而驱动音圈振动。这种实施方式的优点在于，节省空间和所采用的磁铁部件。
再例如，所述中心磁部31可以为中心磁铁，所述边磁部32则包括成对的两支条形边磁铁，两支所述条形边磁铁分别设置在所述中心磁铁的两个对称的侧壁的外围。这样，同样可以在中心磁铁的至少两侧形成磁间隙，进而驱动音圈。这种实施方式的优点在于，在尽可能节省空间的情况下，为音圈提供更强的电磁驱动作用力，强化振动组件的振动性能。
进一步地，再例如，所述边磁部包括四支条边磁铁，四支所述条形边磁铁两两成对，两对所述条形边磁铁分别设置在所述中心磁铁的两对对称的侧壁的外围。也即，两对所述条形边磁铁依次、间隔的环绕设置在所述中心磁铁的周围。这种实施方式的优点在于，能够在中心磁铁的四周均形成由磁铁与磁铁之间构成的磁间隙，显著提高音圈和振膜的受力均匀程度，并提高振动性能。
可选地，所述中心磁部31上可以开设有通孔311，所述通孔311在所述第一振动组件的第一振膜11与第二振动组件的第二振膜21之间形成连通，如图9所示。所述通孔311能够改善所述双面微型发声装置内部的空气流动空间，降低气压、气流对振膜和音圈的影响，从而降低发生偏振的可能性。
进一步地，在振动组件包括补强件的实施方式中，所述补强件上可以形成有凸起或凹陷，如上所述。所述通孔311可以与所述凸起或凹陷的位置相对应，如图9所示。这种实施方式能够更好的降低气流、气压的影响。
本发明还提供了一种电子产品，该电子产品包括产品主体和上述双面 微型发声装置。所述双面微型发声装置设置在所述产品主体中，所述双面微型发声装置被配置为能通过第一振动组件和第二振动组件的振动产生声音。
虽然已经通过示例对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (12)

  1. 一种双面微型发声装置，其特征在于，包括：
    第一振动组件，所述第一振动组件包括第一振膜、第一音圈以及第一定心支片，所述第一振膜上具有第一折环，所述第一定心支片上具有第一悬臂，所述第一定心支片连接在所述第一振膜的一侧表面上；
    第二振动组件，所述第二振动组件包括第二振膜、第二音圈以及第二定心支片，所述第二振膜上具有第二折环，所述第二定心支片上具有第二悬臂，所述第二定心支片连接在所述第二振膜的一侧表面上；
    磁路系统，所述磁路系统包括中心磁部和边磁部，所述中心磁部与边磁部之间形成有磁间隙；
    所述第一振动组件和第二振动组件分别设置在所述磁路系统的上下两侧，所述第一音圈和第二音圈均伸入所述磁间隙中。
  2. 根据权利要求1所述的双面微型发声装置，其特征在于，所述第一振动组件包括第一补强件，所述第一补强件设置在所述第一定心支片上，所述第一补强件位于所述第一振膜的中心区域；
    所述第二振动组件包括第二补强件，所述第二补强件设置在所述第二定心支片上，所述第二补强件位于所述第二振膜的中心区域。
  3. 根据权利要求2所述的双面微型发声装置，其特征在于，所述第一补强件、第二补强件的中部区域设置有朝向磁路系统方向延伸的凸起或者凹陷。
  4. 根据权利要求1所述的双面微型发声装置，其特征在于，所述第一振动组件包括第一反折环件，所述第一反折环件连接在所述第一定心支片的远离所述第一振膜的表面上，所述第一反折环件的弯折方向与所述第一折环的弯折方向相反，所述第一悬臂被包围在所述第一反折环件与第一折环之间。
  5. 根据权利要求1所述的双面微型发声装置，其特征在于，所述第二振动组件包括第二反折环件，所述第二反折环件连接在所述第二定心支片的远离所述第二振膜的表面上，所述第二反折环件的弯折方向与所述第二 折环的弯折方向相反，所述第二悬臂被包围在所述第二反折环件与第二折环之间。
  6. 根据权利要求1所述的双面微型发声装置，其特征在于，所述磁间隙、第一音圈以及第二音圈呈矩形形状，所述第一音圈和第二音圈均具有一对长边和一对短边；
    所述第一定心支片具有第一固定区和第一浮动区，所述第一音圈与所述第一浮动区相对固定，所述第一悬臂连接在所述第一固定区和第一浮动区之间，所述第一定心支片与所述第一音圈的形状相匹配，所述第一定心支片在对应于第一音圈的长边处配置有至少两条第一悬臂；
    所述第二定心支片具有第二固定区和第二浮动区，所述第二音圈与所述第二浮动区相对固定，所述第二悬臂连接在所述第二固定区和第二浮动区之间，所述第二定心支片与所述第二音圈的形状相匹配，所述第二定心支片在对应于第二音圈的长边处配置有至少两条第二悬臂。
  7. 根据权利要求5所述的双面微型发声装置，其特征在于，所述第一定心支片在对应于第一音圈的短边处配置有一或两条第一悬臂；
    所述第二定心支片在对应于第二音圈的短边处配置有一或两条第二悬臂。
  8. 根据权利要求1所述的双面微型发声装置，其特征在于，所述中心磁部为中心磁铁，所述边磁部采用边导磁板构成，至少在所述中心磁铁的对称的两个侧壁外围设置有所述边磁部。
  9. 根据权利要求1所述的双面微型发声装置，其特征在于，所述中心磁部为中心磁铁，所述边磁部包括成对的两支条形边磁铁，两支所述条形边磁铁分别设置在所述中心磁铁的两个对称的侧壁外围。
  10. 根据权利要求9所述的双面微型发声装置，其特征在于，所述边磁部包括四支条形边磁铁，四支所述条形边磁铁两两成对，两对所述条形边磁铁依次环绕设置在所述中心磁铁周围。
  11. 根据权利要求1所述的双面微型发声装置，其特征在于，所述中心磁部上开设有通孔，所述通孔将所述第一振动组件与第二振动组件连通。
  12. 一种电子产品，其特征在于，包括：
    产品主体；
    权利要求1-11所述的双面微型发声装置，所述双面微型发声装置设置在所述产品主体中，所述双面微型发声装置被配置为能通过第一振动组件和第二振动组件的振动产生声音。
PCT/CN2019/129724 2019-03-14 2019-12-30 双面微型发声装置和电子产品 WO2020181890A1 (zh)

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