WO2016000373A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2016000373A1
WO2016000373A1 PCT/CN2014/090339 CN2014090339W WO2016000373A1 WO 2016000373 A1 WO2016000373 A1 WO 2016000373A1 CN 2014090339 W CN2014090339 W CN 2014090339W WO 2016000373 A1 WO2016000373 A1 WO 2016000373A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
sound
outer casing
casing
housing
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.)
Ceased
Application number
PCT/CN2014/090339
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English (en)
French (fr)
Inventor
邵明辉
杨健斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
Original Assignee
Goertek Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Priority to US15/323,024 priority Critical patent/US10178481B2/en
Priority to KR1020167029111A priority patent/KR101807276B1/ko
Publication of WO2016000373A1 publication Critical patent/WO2016000373A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/029—Manufacturing aspects of enclosures transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the present invention relates to the field of electroacoustic conversion technology, and more particularly to a sound emitting device that can increase the area of sound radiation.
  • the size of the terminal electronic device is reduced, the thickness is thinned, and the volume of the micro-sounding device matched with it is getting smaller and smaller, and the performance of the product is higher and higher.
  • the volume of the micro-sounding device matched with it is getting smaller and smaller, and the performance of the product is higher and higher.
  • the sounding device usually includes a speaker unit and a casing disposed around the speaker unit.
  • the speaker unit usually includes a vibration system and a magnetic circuit system.
  • the vibration system includes a diaphragm and a voice coil.
  • the magnetic circuit system forms a magnetic gap for accommodating the voice coil.
  • the diaphragm vibrates and radiates to the outside, so that it can be received by the human ear.
  • the sound emitting device has an sound hole on the outer casing, and the sound hole can radiate sound emitted from the speaker unit to the outside.
  • the sound hole is usually small, and it is difficult to effectively radiate the sound waves emitted by the speaker unit. If the sound hole is increased, the size of the speaker unit is reduced, and the acoustic performance of the sounding device is also affected. .
  • the technical problem to be solved by the present invention is to provide a sound emitting device, which can effectively increase the size of the sound hole when the sound generating device has a certain size, thereby improving the radiation efficiency of the sound hole and increasing the speaker unit. Size to improve acoustic performance.
  • the present invention provides a sound emitting device including a speaker unit and a housing accommodating a fixed speaker unit, the speaker unit including a vibration system and a magnetic circuit system including a diaphragm and a combination a voice coil on one side of the diaphragm, the magnetic circuit system forming a magnetic gap for accommodating a voice coil; a front acoustic cavity is formed between the front side of the diaphragm and the outer casing, and a rear side of the diaphragm is between the rear side and the outer casing Forming a rear acoustic cavity, wherein a side of the outer casing is provided with an acoustic hole, and the sound hole is connected Passing the front sound chamber; the diaphragm includes a ball top at a central position and a loop portion at an edge position, an edge of the loop portion being fixedly coupled to the outer casing, the folded portion and the ball top a side of the connection is provided with a ball top connecting portion,
  • the outer casing includes an upper casing and a middle casing, and the sound hole is formed between the upper casing and the middle casing; a folding portion of the diaphragm is coupled to the middle casing, The position where the middle case is combined with the folding ring portion forms the outer casing joint portion, and the position of the outer casing joint portion is lower than the position of the ball top joint portion.
  • the folded portion of the diaphragm is a concave structure that is bent toward a side close to the magnetic circuit system.
  • a portion of the upper casing facing the diaphragm is injection molded with a metal piece.
  • the height difference between the dome connection portion and the outer casing joint portion is in a range of values between 0.2 mm and 0.6 mm.
  • the ball top of the diaphragm is at the same height as the ball top connection portion.
  • a passive sound source is further disposed in the rear acoustic cavity, and the passive sound source includes two oppositely disposed passive radiators.
  • the middle case is provided with a reinforcing rib.
  • the present invention has a height difference at both ends of the diaphragm ring portion of the sound emitting device, that is, the size of the sound hole can be increased, and the size of the speaker unit can be increased, thereby improving The acoustic properties of the product.
  • FIG. 1 is a schematic cross-sectional structural view of a sound emitting device of the present invention
  • Figure 2 is a cross-sectional structural view of the speaker unit portion of Figure 1 of the present invention.
  • Fig. 3 is a perspective view showing the three-dimensional structure of the sound emitting device of the present invention after the upper casing is removed.
  • the sounding device of the present invention includes a vibration system, a magnetic circuit system, and an outer casing housing the fixed vibration system and the magnetic circuit system, wherein the outer casing includes an upper casing 11, a middle casing 12, and a lower casing 13.
  • the vibration system includes a diaphragm 21 and a voice coil 22 coupled to the lower side of the diaphragm 21;
  • the magnetic circuit system includes a washer 31, a magnet 32, and a basin frame 33 which are sequentially combined, and the outside of the washer 31 and the magnet 32 in the magnetic circuit system
  • the gap is a magnetic gap.
  • the voice coil 22 is received in the magnetic gap, and magnetic lines of force formed by the magnetic circuit system pass through the voice coil 22.
  • the voice coil 22 is usually formed by winding a conductive wire, such as a copper clad aluminum wire. After the electrical signal is turned on, the voice coil 22 can be moved by the ampere force in the magnetic field formed by the magnetic circuit system.
  • the voice coil 22 is turned on as an alternating signal, and the magnitude and direction of the ampere force received correspond to a signal change; by the ampere force, the voice coil 22 vibrates up and down in the magnetic gap. Since the voice coil 22 and the diaphragm 21 are fixedly integrated, the vibration of the voice coil 22 can drive the diaphragm 21 to vibrate, thereby generating sound.
  • the diaphragm 21 includes a flat-shaped ball top 210 at a center position, and a loop portion 211 at the top edge of the ball, as shown in FIG.
  • the ball top 210 is usually combined with a rigid composite layer (not labeled in the figure), the composite layer has good rigidity and light weight, and the addition of the composite layer can improve the high frequency characteristics of the diaphragm 21 and prevent the diaphragm 21 from being split at a high frequency band. vibration.
  • the folding ring portion 211 is connected to the ball top portion 210 and has an arc-shaped and flexible structure. The arc-shaped structure allows the diaphragm 21 to vibrate up and down without excessively pulling the diaphragm 21.
  • the folding ring portion 211 is a concave structure, that is, a structure that is bent toward a side close to the magnetic circuit system.
  • the concave structure of the folding ring portion 211 is specifically configured to match the specific structure of the speaker module to avoid collision. To the upper casing 11, the space inside the module is fully utilized, thereby reducing the thickness of the sounding device and increasing the overall size of the speaker unit.
  • the sound emitting device is a side sounding structure, comprising an upper shell 11 and a lower shell 12, and an sound hole 10 for forming a speaker unit between the upper shell 11 and the middle shell 12, as shown in FIGS. 1 and 2, the sound hole 10 Located on the side of the sounding device, after the sounding device is assembled with the terminal electronic device, the sound hole 10 is also located on the side, which can prevent the sound hole 10 from being blocked when the electronic device is laid flat.
  • the diaphragm 21 is coupled to the middle casing 12, and the edge of the specific folded portion 211 is combined with the middle casing 12, as shown in FIGS. Wherein, a part of the structure where the folded portion 122 and the middle case 12 are combined is located on the port of the sound hole 10.
  • the loop portion 211 includes a top portion 210 with the ball
  • the connected ball top connecting portion A is located on the other side of the folding ring portion 211 and is fixedly coupled to the middle casing 12, wherein the ball top connecting portion A and the outer casing joint portion B have a height difference d, as shown in FIG. Shown.
  • the folding ring portion 211 is a concave structure, and the position of the outer casing joint portion B is lower than the position indicated by the ball top connecting portion A, that is, the distance between the outer casing joint portion B and the bottom wall of the basin frame 33 is smaller than the ball top connecting portion A.
  • the distance from the bottom wall of the basin frame 33 is shown collectively in Figures 2 and 3.
  • the height difference d between the dome connection portion A and the outer casing joint portion B is in a range of values between 0.2 mm and 0.6 mm, and the height difference d within the above range can ensure the acoustic performance of the diaphragm.
  • the height of the ball top 210 of the diaphragm 21 is the same as the height at which the dome connection portion A is located. But it is not limited to this structure.
  • the upper side of the sound hole 10 of the present invention is an end surface of the upper casing 11, and the lower side of the sound hole 10 is an end surface of the middle casing 12. Since the upper casing 11 needs to have a certain thickness in order to ensure the strength of the casing, By reducing the height of the middle casing 12, the sound hole 10 is maximized; correspondingly, the position of the folded portion 211 combined with the middle casing 12 is also lowered, and the folding portion 211 is not affected in order to affect the size of the single body. Both ends are arranged in the above-described structure having a height difference. Such a structure having a height difference at both ends of the folded portion 211 can increase the size of the sound hole and at the same time increase the size of the single body, thereby effectively improving the acoustic performance of the sound emitting device.
  • the upper side of the diaphragm 21 is an upper casing 11 in the protection frame, and the upper casing 11 includes a plastic body.
  • the center of the upper casing 11 can be injection molded with a metal sheet 110.
  • the metal material can be thinner than the plastic material.
  • the required strength is achieved. Therefore, the structure of the upper case 11 injection molded metal piece 110 can reduce the thickness of the sound emitting device, or can increase the internal space of the sound emitting device when the thickness of the sound emitting device is constant, thereby increasing the speaker unit.
  • the size of the product enhances the acoustic performance of the product.
  • the middle case 12 is fixed to the magnetic circuit system, and the upper case 11 and the middle case 12 are fixedly coupled by means of bonding or ultrasonic welding, and the upper case 11 and the middle case 12 are accommodated to fix the speaker unit.
  • the diaphragm 21 divides the space inside the sounding device into a front sound chamber and a rear sound chamber.
  • the front sound chamber is a space surrounded by the upper side of the diaphragm 21 (away from the side of the voice coil 22) and the upper shell 11 and the middle shell 12, and the front sound chamber It is connected to the sound hole 10 so that the sound can be radiated to the outside, but it is not limited to this structure, and the rear sound chamber can be connected to the sound hole 10.
  • the rear acoustic cavity is an acoustic cavity formed on the side of the diaphragm 21 close to the magnetic circuit system.
  • the conventional acoustic cavity is a closed structure, and a passive sound source is disposed in the rear acoustic cavity of the present invention.
  • two passive radiators may be disposed in the rear acoustic cavity of the sounding device of the present invention: a passive radiator 51 and a passive radiator 52.
  • Passive radiator 51 and passive radiator 52 are arranged in parallel
  • the two passive radiators are disposed opposite each other, and a passive cavity 51 and a passive radiator 52 enclose a cavity.
  • the passive radiator 51 and the passive radiator 52 of the present embodiment have exactly the same structure, but are not limited to this identical structure.
  • the upper side of the device 51 and the underside of the passive radiator 52 allow air in the cavity between the two passive radiators to be squeezed through the sound hole of the passive sound source to communicate with the outside.
  • the structure in which the passive radiator is disposed in the rear acoustic cavity can fully utilize the space of the rear acoustic cavity, and utilizes the acoustic waves in the rear acoustic cavity to vibrate the passive radiator to generate a low sound, thereby improving the bass effect of the entire sounding device.
  • the rear acoustic cavity of the sounding device is mainly surrounded by the middle case 12 and the lower case 13.
  • the position of the passive radiator 51 on the middle casing 12 may be injection molded with the metal piece 121, and the injection molded metal piece 131 is also injection molded on the lower casing 13 at the position facing the passive radiator 52.
  • the structure of the injection metal piece at the position where the passive radiator 51 and the passive radiator 52 have a large amplitude of vibration can increase the height (space) of the corresponding position, and provide sufficient space for the vibration of the two passive radiators, thereby ensuring sound generation.
  • the acoustic performance of the device can increase the height (space) of the corresponding position, and provide sufficient space for the vibration of the two passive radiators, thereby ensuring sound generation.
  • a rib 12 is disposed on the middle casing 12 corresponding to the sound hole 10, and the rib 12 can increase the structural strength at the sound hole 10 to prevent the upper casing 11 and/or the middle casing 12 from collapsing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本发明公开了一种发声器件，包括扬声器单体和收容固定扬声器单体的外壳，扬声器单体包括振动系统和磁路系统，振动系统包括振膜和结合于振膜一侧的音圈，磁路系统形成容纳音圈的磁间隙；振膜前侧与外壳之间形成前声腔，振膜后侧与外壳之间形成后声腔，其中，外壳的侧面设有出声孔，出声孔连通前声腔；振膜包括位于中心位置的球顶部和位于边缘位置的折环部，折环部的边缘与外壳固定结合，折环部与球顶部连接的一侧设有球顶连接部，折环部与外壳结合的一侧设有外壳结合部；外壳结合部的部分结构位于出声孔的端口上，外壳结合部与球顶连接部之间具有高度差。本发明可以增加出声孔和扬声器单体的尺寸，从而提高了产品的声学性能。

Description

发声器件 技术领域
本发明涉及电声转换技术领域，更为具体地，涉及一种可增大声音辐射面积的发声器件。
背景技术
随着社会的进步和技术的发展，终端电子装置体积减小，厚度减薄，与之配合的微型发声器件的体积也越来越小，而消费者对产品的性能却要求越来越高。对于小体积的发声器件，受体积限制，难以达到理想的声学效果。
发声器件通常包括扬声器单体和围绕扬声器单体设置的外壳，扬声器单体通常包括振动系统和磁路系统，振动系统包括振膜和音圈，磁路系统形成收容音圈的磁间隙，在音圈的带动下振膜振动发声并辐射到外界，从而可以被人耳接收。通常发声器件的外壳上设有出声孔，出声孔可以使扬声器单体内发出的声音辐射到外界。但是受发声器件尺寸的限制，出声孔通常很小，难以有效的辐射扬声器单体发出的声波，如果增大出声孔又会减小扬声器单体的尺寸，同样会影响发声器件的声学性能。
因此，有必要提供一种发声器件，以解决上述问题。
发明内容
本发明所要解决的技术问题是提供一种发声器件，在发声器件大小一定的情况下，可以有效的增大出声孔的尺寸，从而提高出声孔的辐射效率，同时增大扬声器单体的尺寸，提高声学性能。
为了解决上述技术问题，本发明提供了一种发声器件，包括扬声器单体和收容固定扬声器单体的外壳，所述扬声器单体包括振动系统和磁路系统，所述振动系统包括振膜和结合于振膜一侧的音圈，所述磁路系统形成容纳音圈的磁间隙；所述振膜前侧与所述外壳之间形成前声腔，所述振膜后侧与所述外壳之间形成后声腔，其中，所述外壳的侧面设有出声孔，所述出声孔连 通所述前声腔；所述振膜包括位于中心位置的球顶部和位于边缘位置的折环部，所述折环部的边缘与所述外壳固定结合，所述折环部与所述球顶部连接的一侧设有球顶连接部，所述折环部与所述外壳结合的一侧设有外壳结合部；并且所述外壳结合部的部分结构位于所述出声孔的端口上，所述外壳结合部与所述球顶连接部之间具有高度差。
此外，优选的方案是，所述外壳包括上壳和中壳，所述上壳和中壳之间形成所述出声孔；所述振膜的折环部结合于所述中壳上，所述中壳与所述折环部结合的位置形成所述外壳结合部，所述外壳结合部的位置低于所述球顶连接部的位置。
此外，优选的方案是，所述振膜的折环部为下凹的结构，向靠近所述磁路系统的一侧弯曲。
此外，优选的方案是，所述上壳上正对所述振膜的部分注塑有金属片。
此外，优选的方案是，所述球顶连接部与所述外壳结合部之间的高度差在0.2mm至0.6mm之间的数值范围内。
此外，优选的方案是，所述振膜的球顶部与所述球顶连接部所处的高度相同。
此外，优选的方案是，所述后声腔内还设有被动声源，所述被动声源包括两个相对设置的被动辐射器。
此外，优选的方案是，所述中壳上设有加强筋。
采用上述技术方案后，与传统结构相比，本发明在发声器件的振膜折环部的两端存在高度差，即可以增加出声孔的尺寸，又可以增加扬声器单体的尺寸，从而提高了产品的声学性能。
附图说明
通过参考以下结合附图的说明及权利要求书的内容，并且随着对本发明的更全面理解，本发明的其它目的及结果将更加明白及易于理解。在附图中：
图1是本发明发声器件的剖面结构示意图；
图2是本发明图1所示扬声器单体部分的剖面结构示意图；
图3是本发明发声器件去掉上壳后的立体结构示意图。
具体实施方式
以下将结合附图对本发明的具体实施例进行详细描述。
结合图1和图2，本发明发声器件包括振动系统、磁路系统以及收容固定振动系统和磁路系统的外壳，其中，外壳包括上壳11、中壳12和下壳13。振动系统包括振膜21和结合于振膜21下侧的音圈22；磁路系统包括依次结合的华司31、磁铁32和盆架33，磁路系统中的华司31、磁铁32的外侧面和盆架33侧壁之间具有一定间隙，该间隙为磁间隙，音圈22收容于该磁间隙中，磁路系统形成的磁力线穿过音圈22。其中音圈22通常由导电金属丝缠绕而成，如铜包铝线，音圈22接通电信号后，在磁路系统形成的磁场中受安培力的作用可以运动。音圈22中接通的为交变信号，所受的安培力的大小和方向对应信号变化；受安培力的作用，音圈22在磁间隙中上下振动。由于音圈22与振膜21是固定结合为一体的，音圈22的振动可以带动振膜21振动，从而产生声音。
振膜21包括位于中心位置的平板状的球顶部210，以及位于球顶部边缘的折环部211，如图2中所示。球顶部210上通常结合刚性的复合层(图中未标号)，复合层具有良好的刚性且质量较轻，添加复合层可以提升振膜21的高频特性，防止振膜21在高频段产生分割振动。折环部211与球顶部210相连，为弧形且柔性的结构，弧形结构使振膜21可以上下振动而不会过大的牵拉振膜21。本实施例折环部211为下凹的结构，即为向靠近磁路系统一侧弯曲的结构，这种折环部211下凹的结构具体是配合扬声器模组的具体结构设置的，避免碰撞到上壳11，充分的利用了模组内部的空间，从而有利于减小发声器件的厚度，增大扬声器单体的整体尺寸。
发声器件为侧面出声的结构，包括上壳11和下壳12，上壳11和中壳12之间形成扬声器单体的出声孔10，如图1和图2所示，出声孔10位于发声器件的侧面，发声器件与终端电子装置组装后，出声孔10也位于侧面，可以避免电子装置平放时堵塞出声孔10。其中，振膜21结合于中壳12上，具体的折环部211的边缘与中壳12结合，如图1至图3所示。其中，折环部122与中壳12结合处的部分结构位于出声孔10的端口上。在发声器件大小一定的情况下，为了增大出声孔10的尺寸，使振膜21产生的声音更顺畅的辐射到外界，本发明折环部211的两端存在高度差。折环部211包括与球顶部210 连接的球顶连接部A，位于折环部211另一侧的与中壳12固定结合的外壳结合部B，其中球顶连接部A与外壳结合部B之间具有高度差d，如图2所示。结合折环部211为下凹的结构，外壳结合部B的位置低于球顶连接部A所示的位置，即外壳结合部B与盆架33底壁之间的距离小于球顶连接部A与盆架33底壁之间的距离，如图2和图3共同所示。
优选的，球顶连接部A和外壳结合部B之间的高度差d在0.2mm至0.6mm之间的数值范围内，高度差d在上述范围内可以保证振膜的声学性能。
优选的，振膜21的球顶部210的高度与球顶连接部A所处的高度相同。但是不限于这种结构。
本发明出声孔10的上侧为上壳11的一个端面，出声孔10的下侧为中壳12的一个端面，由于上壳11为了保证壳体的强度需要具有一定的厚度，只能通过降低中壳12的高度，实现了出声孔10的最大化；相应的，与中壳12结合的折环部211的位置也要降低，为了不影响单体的尺寸，将折环部211的两端设置成上述具有高度差的结构。这种折环部211两端具有高度差的结构，可以使出声孔的尺寸增大，同时有利于增大单体的尺寸，从而有效的提升了发声器件的声学性能。
振膜21的上侧为保护框架中的上壳11，上壳11包括塑料本体，上壳11的中心位置可以注塑有金属片110，与塑料材料相比，金属材料在厚度较薄时即可达到所需强度，因此，这种上壳11注塑金属片110的结构可以降低发声器件的厚度，或者在发声器件厚度一定的情况下可以增大发声器件的内部空间，从而可以增大扬声器单体的尺寸，提升产品声学性能。中壳12固定磁路系统，上壳11与中壳12之间通过粘结或超声波焊接的方式固定结合，由上壳11和中壳12收容固定扬声器单体。振膜21将发声器件内部的空间分隔为前声腔和后声腔，前声腔为振膜21上侧(远离音圈22一侧)与上壳11、中壳12之间围成的空间，前声腔与出声孔10连通，使声音可以辐射到外界，但不限于这种结构，也可以为后声腔与出声孔10连通。后声腔为振膜21靠近磁路系统一侧形成的声腔，传统结构后声腔为封闭的结构，本发明后声腔中设置有被动声源。
如图1所示，本发明发声器件的后声腔中可以设置有两个被动辐射器：被动辐射器51和被动辐射器52。被动辐射器51和被动辐射器52为平行设置 的结构，两被动辐射器相对设置，被动辐射器51和被动辐射器52之间围成一个空腔。本实施例被动辐射器51和被动辐射器52为完全相同的结构，但不限于这种完全相同的结构。扬声器单体中振膜21后侧产生的声波流动到被动声源时，分别流通到被动辐射器51和被动辐射器52远离对方的一侧，即气流被分为两部分，分别流通到被动辐射器51的上侧和被动辐射器52的下侧，使两被动辐射器之间的空腔内的空气被挤压通过被动声源的出声孔连通到外界。这种在后声腔内设置被动辐射器的结构，可以充分利用后声腔的空间，利用后声腔内的声波使被动辐射器振动发声，产生低音，从而提升了整个发声器件的低音效果。
如图1所示，发声器件的后声腔主要由中壳12和下壳13围成的。同样，为了充分利用发声器件的空间，在中壳12上正对被动辐射器51的位置可以注塑有金属片121，同样下壳13上正对被动辐射器52的位置注塑有注塑金属片131，这种在被动辐射器51和被动辐射器52振动幅度较大的位置注塑金属片的结构可以增大对应位置的高度(空间)，为两被动辐射器的振动提供足够的空间，从而可以保证发声器件的声学性能。
此外，中壳12上对应出声孔10的位置设有加强筋12，加强筋12可以增加出声孔10处的结构强度，防止上壳11和/或中壳12出现塌陷。
如上参照附图以示例的方式描述了根据本发明提出的发声器件。但是，本领域技术人员应当理解，对于上述本发明所提出的发声器件，还可以在不脱离本发明内容的基础上做出各种改进。因此，本发明的保护范围应当由所附的权利要求书的内容确定。

Claims (8)

  1. 一种发声器件，包括扬声器单体和收容固定扬声器单体的外壳，所述扬声器单体包括振动系统和磁路系统，所述振动系统包括振膜和结合于振膜一侧的音圈，所述磁路系统形成容纳音圈的磁间隙；所述振膜前侧与所述外壳之间形成前声腔，所述振膜后侧与所述外壳之间形成后声腔，其特征在于，
    所述外壳的侧面设有出声孔，所述出声孔连通所述前声腔；
    所述振膜包括位于中心位置的球顶部和位于边缘位置的折环部，所述折环部的边缘与所述外壳固定结合，所述折环部与所述球顶部连接的一侧设有球顶连接部，所述折环部与所述外壳结合的一侧设有外壳结合部；
    并且所述外壳结合部的部分结构位于所述出声孔的端口上，所述外壳结合部与所述球顶连接部之间具有高度差。
  2. 根据权利要求1所述的发声器件，其特征在于，所述外壳包括上壳和中壳，所述上壳和中壳之间形成所述出声孔；
    所述振膜的折环部结合于所述中壳上，所述中壳与所述折环部结合的位置形成所述外壳结合部，所述外壳结合部的位置低于所述球顶连接部的位置。
  3. 根据权利要求2所述的发声器件，其特征在于，所述振膜的折环部为下凹的结构，向靠近所述磁路系统的一侧弯曲。
  4. 根据权利要求2所述的发声器件，其特征在于，所述上壳上正对所述振膜的部分注塑有金属片。
  5. 根据权利要求1所述的发声器件，其特征在于，所述球顶连接部与所述外壳结合部之间的高度差在0.2mm至0.6mm之间的数值范围内。
  6. 根据权利要求1所述的发声器件，其特征在于，所述振膜的球顶部与所述球顶连接部所处的高度相同。
  7. 根据权利要求1所述的发声器件，其特征在于，所述后声腔内还设有被动声源，所述被动声源包括两个相对设置的被动辐射器。
  8. 根据权利要求2所述的发声器件，其特征在于，所述中壳上设有加强筋。
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