WO2020140542A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2020140542A1
WO2020140542A1 PCT/CN2019/110744 CN2019110744W WO2020140542A1 WO 2020140542 A1 WO2020140542 A1 WO 2020140542A1 CN 2019110744 W CN2019110744 W CN 2019110744W WO 2020140542 A1 WO2020140542 A1 WO 2020140542A1
Authority
WO
WIPO (PCT)
Prior art keywords
dome
protrusion
side wall
body portion
speaker according
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/CN2019/110744
Other languages
English (en)
French (fr)
Inventor
陈敏敏
狄勋
赵彬
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.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Pte Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
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 AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2020140542A1 publication Critical patent/WO2020140542A1/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
    • H04R9/02—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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • 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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/026—Supports for loudspeaker casings
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • 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
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin
    • 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

Definitions

  • the utility model relates to the field of electroacoustic conversion, in particular to a speaker.
  • the diaphragm is the core component of acoustic devices such as speakers, and the requirements for its acoustic performance have also increased.
  • a related art speaker includes a basin frame, a magnetic circuit system and a vibration system provided in the basin frame, and the vibration system includes a diaphragm fixed on the basin frame and a voice coil connected to the diaphragm.
  • the voice coil is inserted in the magnetic gap of the magnetic circuit system and directly contacts the diaphragm.
  • the voice coil since the voice coil is directly in contact with the diaphragm and completely fits in the contact position, in order to ensure sufficient space between the magnetic bowl and the dome during the thinning of the speaker, the voice coil It needs to be elongated to ensure the magnetic flux.
  • the amplitude of the diaphragm becomes larger, it needs more space.
  • the airflow in the voice coil cannot be circulated in time, and the strength of the conventional alloy dome is not enough, which affects the performance of the speaker and makes the performance of the speaker. decline.
  • the technical problem to be solved by the utility model is to provide a loudspeaker structure with good performance and capable of being thinned.
  • the present invention provides a loudspeaker including a basin stand, a magnetic circuit system and a vibration system provided in the basin stand, the vibration system includes a folding ring fixed on the basin stand, A dome fixed at the center of the folding ring and a voice coil connected below the dome, the dome includes a first dome and a second dome stacked in sequence, and the second dome includes a body portion And a plurality of protrusions extending from the body portion in the direction of the magnetic circuit system, a gap is formed between adjacent protrusions, the protrusion includes a bottom surface close to the magnetic circuit system, the voice coil and The bottom surface abuts and forms a leak channel between the spaced position and the second dome.
  • the body portion has a rectangular structure with rounded corners.
  • the body portion includes a relatively long axis side and a short axis side connected to the long axis side, and the protrusion is provided on the long axis side and/or For the edge of the short axis side, the interval is between two adjacent protrusions.
  • the protrusion further includes a side wall surface extending from the body portion in the direction of the magnetic circuit system, the side wall surface and the bottom surface together enclose the protrusion, and the side wall surface includes oppositely arranged and Two first side wall surfaces inclined toward the geometric center of the body portion and a second side wall surface connected to the first side wall surface, the plane where the two first side wall surfaces are located intersects inside the body portion.
  • the protrusion further includes a side wall surface extending from the body portion in the direction of the magnetic circuit system, the side wall surface and the bottom surface together enclose the protrusion, and the side wall surface is oppositely provided
  • the two side wall surfaces are parallel to each other.
  • the number of the protrusions is four, which are symmetrically distributed along the mid-vertical line of the long-axis side and/or the mid-vertical line of the short-axis side, respectively.
  • the four protrusions are respectively parallel to the long axis side or the short axis side where they are located.
  • the height of the protrusion is 10-3000um.
  • the width of the protrusion is 100-1000um.
  • the thickness of the body portion is 50-500um.
  • the first dome is woven cloth, carbon fiber, a composite material of carbon fiber and foamed material or epoxy resin, polyetheretherketone, polyimide, polyphenylene sulfide, polyparaphenylene benzo Pre-impregnated resin materials such as dioxazole and aramid 1414.
  • the second dome is made of alloy materials such as aluminum alloy, magnesium alloy, magnesium-lithium alloy, or titanium alloy, or a composite material such as aluminum foil or copper foil and foamed material.
  • the foamed material includes polymethacrylimide, methylcyclopentenolone, foamed polyphenylene sulfide or foamed polyimide.
  • the protrusion is formed by stamping on the second dome, and a groove matching the protrusion is formed on the side of the body away from the protrusion, the groove is filled There are damping materials such as foam, glue, rubber or veneer.
  • the second dome is provided between the first dome and the voice coil, and the protrusion is provided on the second dome.
  • the voice coil forms a leak channel that facilitates airflow through the gaps between the plurality of protrusions, so that the airflow in the voice coil can be circulated in time through the leak channel, which can be effectively reduced after the vibration system amplitude increases.
  • the difference between the internal and external air pressure of the voice coil avoids the influence of the unbalanced internal and external air pressure on the performance of the speaker; at the same time, relative to the situation where the voice coil is directly in contact with the first dome, the arrangement of the protrusions Although it occupies part of the space where the voice coil was originally placed, the voice coil becomes shorter and thicker, which reduces the thickness of the speaker and improves the magnetic flux; in addition, although the single dome is provided with a protrusion extending in the direction of the magnetic circuit system The strength of the dome is enhanced without increasing the thickness of the dome.
  • the arrangement of the first dome and the second dome also ensures the structural strength of the groove of the dome without filling the damping material, so that the structural strength of the vibration system itself is enhanced, so that the speaker In the case of miniaturization, it can still maintain good and reliable performance.
  • 1 is a schematic diagram of the stereo structure of the speaker provided by the utility model
  • FIG. 2 is an exploded schematic view of the stereo structure of the speaker provided by the utility model
  • FIG. 3 is a schematic diagram of the cooperation between the second dome of the speaker and the voice coil provided by the utility model
  • FIG. 4 is a cross-sectional view of the speaker shown in FIG. 3 along line A-A;
  • FIG. 5 is a schematic diagram of a three-dimensional structure of a second dome and a voice coil of the second embodiment of the speaker provided by the utility model;
  • FIG. 6 is a schematic perspective view of the second dome of the second embodiment of the speaker provided by the utility model.
  • the present invention provides a speaker 100.
  • the speaker 100 includes a basin frame 10, a magnetic circuit system 30 and a vibration system 50 provided in the basin frame 10.
  • the magnetic circuit system 30 includes a magnetic bowl 31, a main magnetic steel 33 disposed in the magnetic bowl 31, a magnetic conductive plate 35 disposed above the main magnetic steel 33, and surrounding the main magnetic steel 33 Auxiliary magnetic steel 37 and an upper clamping plate 39 provided above the auxiliary magnetic steel 37. Wherein, a magnetic gap is formed between the main magnetic steel 33 and the auxiliary magnetic steel 37.
  • the vibration system 50 includes a folding ring 51 fixed on the basin frame 10, a dome 53 fixed on the center of the folding ring 51, and a voice coil 55 connected below the dome 53.
  • the voice coil 55 is inserted into the magnetic gap and drives the dome 53 to vibrate and sound.
  • the dome 53 includes a first dome 531 and a second dome 533 that are sequentially stacked, and the first dome 531 and the second dome 533 are fixedly connected by hot pressing or gluing. And the setting of double balls makes the strength of the whole vibration system improved.
  • the second dome 533 includes a body portion 5331 and a plurality of protrusions 5333 extending from the body portion 5331 toward the magnetic circuit system 30. A space 101 is formed between adjacent protrusions 5333. It should be noted that in this embodiment, the second dome 533 is formed with the protrusion 5333 by stamping, that is, the side of the body portion 5331 away from the protrusion 5333 is formed corresponding to the protrusion From 5333 matching grooves. In addition, the groove is filled with damping materials such as foam, glue, rubber or veneer, which can increase the damping of the vibration system 50 and realize further modulation of the performance of the speaker 100.
  • damping materials such as foam, glue, rubber or veneer
  • the body portion 5331 is a rectangular structure with rounded corners. Specifically, the body portion 5331 includes a long axis side 53311 and a short axis side 53313 connected to the long axis side 53311, and the protrusion 5333 is disposed on the On the edge of the long axis side 53311 and/or the short axis side 53313, the space 101 is located between two adjacent protrusions 5333.
  • the protrusion 5333 may also be correspondingly disposed at the corner of the body portion 5331.
  • the protrusion 5333 includes a bottom surface 53331 near the magnetic circuit system 30 and a side wall surface 53333 extending from the body portion 5331 in the direction of the magnetic circuit system 30, and the side wall surface 53333 and the bottom surface 53331 are formed together
  • the protrusion 5333 includes two first side wall surfaces 53333a opposite to each other and inclined toward the geometric center of the body 5331, and a second side wall surface 53333b connecting the first side wall surface 53333a, and the two The plane where the first side wall surface 53333a lies intersects inside the body portion 5331.
  • the bottom surface 53331 of the protrusion 5333 abuts the voice coil 55 and forms a leak channel 102 between the position of the space 101 and the second dome 533.
  • the air flow in the voice coil 55 can be circulated in time through the leakage channel 102, and the amplitude of the vibration system 50 can effectively reduce the voice coil 55.
  • the difference in internal and external air pressure avoids the influence of the unbalanced internal and external air pressure of the voice coil 55 on the performance of the speaker 100.
  • the number of the protrusions 5333 is four, which are respectively located on the two long-axis sides 53311 and the two short-axis sides 53313 of the body portion 5331 and are respectively The long axis side 53311 or the short axis side 53313 is parallel.
  • the two protrusions 5333 located on the long axis side 53311 are symmetrically distributed along the mid-vertical line of the short axis side 53313, and the two protrusions 5333 located on the short axis side 53313 are along the long axis
  • the vertical line of axis 53311 is symmetrically distributed.
  • the height of the protrusion 5333 is between 10-3000um.
  • the height is the distance that the protrusion 5333 extends from the body portion 5331 to the magnetic circuit system 30. If the height is too small, the size of the leakage channel 102 formed between the voice coil 55 and the second dome 533 is too small, and the effect of timely and good airflow in the voice coil 55 cannot be achieved. If the height is too large, the protrusion 5333 will occupy too much space where the voice coil 55 was originally placed, thereby limiting the volume of the voice coil 55, which is not conducive to obtaining a large magnetic flux.
  • the width of the protrusion 5333 is between 100 and 1000 um, which matches the thickness of the voice coil 55 under normal circumstances. If the width is too small, the bonding area between the voice coil 55 and the second dome 533 is reduced, and the voice coil 55 cannot be firmly adhered to the second dome 533, thereby affecting the entire The reliability of the speaker 100 has an impact. If the width is too large, although it does not significantly affect the bonding of the voice coil 55, it is not necessary to provide a larger width for the protrusion 5333.
  • the thickness of the body portion 5331 is between 50 and 500um.
  • the thickness of the body portion 5331 is controlled within this range, and the strength of the entire dome structure is enhanced while ensuring the adhesion effect between the second dome 533 and the first dome 531. More preferably, the thickness of the body portion 5331 is between 80-200um.
  • the first dome 531 is a woven cloth, carbon fiber, a composite material of carbon fiber and foamed material or epoxy resin, polyether ether ketone, polyimide, poly Phenyl sulfide, poly-p-phenylene benzodioxazole, aramid 1414 and other prepreg resin materials
  • the second dome 533 is an alloy material such as aluminum alloy, magnesium alloy, magnesium lithium alloy or titanium alloy or aluminum foil or Composite materials such as copper foil and foam materials.
  • the foamed material is polymethacrylimide, methylcyclopentenolone, foamed polyphenylene sulfide or foamed polyimide.
  • the structure of the speaker provided in this embodiment is basically the same as the structure of the speaker 100 of Embodiment 1.
  • the protrusion 5333′ includes A side wall surface 53331' extending in the direction of the magnetic circuit system and a bottom surface 53333' close to the magnetic circuit system, the side wall surface 53331' and the bottom surface 53333' together form the protrusion 5333', the side wall surface
  • the two opposite side wall surfaces 53331' in 53331' are parallel to each other.
  • the two opposite side wall surfaces 53331' in this embodiment are parallel to each other.
  • the four protrusions 5333' are parallel to the long-axis side 53311' or the short-axis side 53313', respectively, and the two protrusions 5333' located on the long-axis side 53311' are along the The mid-vertical line of the short-axis side 53313' is symmetrically distributed, the two protrusions 5333' located on the short-axis side 53313' are symmetrically distributed along the mid-vertical line of the long-axis side 53311', and two adjacent protrusions There is no connection between 5333', there is a space 101'.
  • the voice coil 55' abuts on the bottom surface 53333' of the protrusion 5333' and forms a leakage channel 102 between the position where the protrusion 5333' forms a space 101' and the second dome 533' '.
  • the second dome is provided between the first dome and the voice coil, and the protrusion is provided on the second dome.
  • the voice coil forms a leak channel that facilitates airflow through the gaps between the plurality of protrusions, so that the airflow in the voice coil can be circulated in time through the leak channel, which can be effectively reduced after the vibration system amplitude increases.
  • the difference between the internal and external air pressure of the voice coil avoids the influence of the unbalanced internal and external air pressure on the performance of the speaker; at the same time, relative to the situation where the voice coil is directly in contact with the first dome, the arrangement of the protrusions Although it occupies part of the space where the voice coil was originally placed, the voice coil becomes shorter and thicker, which reduces the thickness of the speaker and improves the magnetic flux; in addition, although the single dome is provided with a protrusion extending in the direction of the magnetic circuit system The strength of the dome is enhanced without increasing the thickness of the dome.
  • the arrangement of the first dome and the second dome also ensures the structural strength of the groove of the dome without filling the damping material, so that the structural strength of the vibration system itself is enhanced, so that the speaker In the case of miniaturization, it can still maintain good and reliable performance.

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

Abstract

本发明提供了一种扬声器，包括盆架、设于所述盆架内的磁路系统及振动系统，所述振动系统包括固定于所述盆架上的折环、固定于所述折环中央的球顶及连接于所述球顶下方的音圈，所述球顶包括依次叠设的第一球顶和第二球顶，所述第二球顶包括本体部及自所述本体部向所述磁路系统方向延伸的多个凸起，相邻所述凸起之间形成间隔，所述凸起包括靠近所述磁路系统的底面，所述音圈与所述底面相抵接并在所述间隔的位置与所述第二球顶之间形成泄露通道。与相关技术相比，本发明提供的扬声器可避免音圈因内外气压不平衡对扬声器性能的影响。

Description

扬声器 技术领域
本实用新型涉及电声转换领域，尤其涉及一种扬声器。
 背景技术
随着市场需求的不断提高，电子器件如手机等逐渐向薄型化方向发展，而且要求其声音质量越来越好，这就要求手机中的声学器件向着微型、薄型、高音质的方向发展。振膜是扬声器等声学器件的核心部件，对其声学性能的要求也就随之提高。
相关技术的扬声器包括盆架、设于所述盆架内的磁路系统和振动系统，所述振动系统包括固定于所述盆架上的振膜以及连接于所述振膜的音圈。所述音圈插设于所述磁路系统的磁间隙内并与所述振膜直接抵接。在这种扬声器结构中，由于音圈与振膜直接抵接并在抵接的位置完全贴合，在扬声器薄型化的过程中，为了保证磁碗与球顶之间足够的空间大小，音圈需要拉长才能保证磁通量，振膜振幅变大后则需要更大的空间，音圈内的气流无法及时流通，并且常规合金球顶的强度不够，从而对扬声器的性能造成影响，使得扬声器的性能下降。
因此，有必要提供一种新的扬声器来解决上述问题。
 技术问题
本实用新型要解决的技术问题是提供一种性能良好并能够实现薄型化的扬声器结构。
 技术解决方案
为解决上述技术问题，本实用新型提供了一种扬声器，包括盆架、设于所述盆架内的磁路系统及振动系统，所述振动系统包括固定于所述盆架上的折环、固定于所述折环中央的球顶及连接于所述球顶下方的音圈，所述球顶包括依次叠设的第一球顶和第二球顶，所述第二球顶包括本体部及自所述本体部向所述磁路系统方向延伸的多个凸起，相邻所述凸起之间形成间隔，所述凸起包括靠近所述磁路系统的底面，所述音圈与所述底面相抵接并在所述间隔的位置与所述第二球顶之间形成泄漏通道。
优选的，所述本体部为圆角矩形结构，所述本体部包括相对设置的长轴边以及连接所述长轴边的短轴边，所述凸起设于所述长轴边和/或所述短轴边的边缘，所述间隔位于相邻两个所述凸起之间。
优选的，所述凸起还包括自所述本体部向所述磁路系统方向延伸的侧壁面，所述侧壁面与所述底面共同围成所述凸起，所述侧壁面包括相对设置且向所述本体部几何中心倾斜的两条第一侧壁面以及连接所述第一侧壁面的第二侧壁面，两条所述第一侧壁面所在的平面相交于所述本体部内部。
优选的，所述凸起还包括自所述本体部向所述磁路系统方向延伸的侧壁面，所述侧壁面与所述底面共同围成所述凸起，所述侧壁面中相对设置的两条所述侧壁面相互平行。
优选的，所述凸起的数量为四个，分别沿所述长轴边的中垂线和/或所述短轴边的中垂线对称分布。
优选的，四个所述凸起分别与其所在的所述长轴边或所述短轴边平行。
优选的，所述凸起的高度为10~3000um。
优选的，所述凸起的宽度为100~1000um。
优选的，所述本体部的厚度为50~500um。
优选的，所述第一球顶为编织布、碳纤维、碳纤维与发泡材料的复合材料或为环氧树脂、聚醚醚酮、聚酰亚胺、聚苯硫醚、聚对苯撑苯并二恶唑、芳纶1414等预浸树脂材料，所述第二球顶为铝合金、镁合金、镁锂合金或钛合金等合金材料或为铝箔或铜箔等与发泡材料的复合材料。
优选的，所述发泡材料包括聚甲基丙烯酰亚胺、甲基环戊烯醇酮、发泡聚苯硫醚或发泡聚酰亚胺。
优选的，所述第二球顶通过冲压的方式形成所述凸起，所述本体部远离所述凸起的一侧对应形成与所述凸起相匹配的凹槽，所述凹槽内填充有泡棉、胶水、橡胶或木皮等阻尼材料。
 有益效果
与相关技术相比，本实用新型的扬声器，通过在所述第一球顶与所述音圈之间设置所述第二球顶，并在所述第二球顶设置所述凸起，所述音圈通过多个所述凸起之间的间隙形成利于气流流通的泄漏通道，使得音圈中的气流能够通过所述泄漏通道得到及时的流通，在振动系统振幅增大后能有效减小音圈的内外气压差，避免了音圈内外气压不平衡对扬声器性能的影响；同时，相对于所述音圈与所述第一球顶直接抵接的情况来说，所述凸起的设置虽然占据了部分原本放置音圈的空间，然而音圈变矮变粗，减小了所述扬声器厚度的同时使得磁通量得以提升；此外，单一球顶虽然通过设置向磁路系统方向延伸的凸起在不增加球顶厚度的同时增强了球顶强度，然而在凸起所对应的凹槽中不进行材料填充的情况下，球顶在凸起位置的结构强度很难得到保证。因此，第一球顶与第二球顶相配合的设置也保证了球顶的凹槽在不填充阻尼材料情况下的结构强度，使得所述振动系统本身的结构强度得到增强，使所述扬声器在微型化的情况下依然能够保持良好、可靠的性能。
 附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本实用新型提供的扬声器的立体结构示意图；
图2为本实用新型提供的扬声器的立体结构分解示意图；
图3为本实用新型提供的扬声器的第二球顶与音圈的配合示意图；
图4为图3所示扬声器沿A-A线的剖视图；
图5为本实用新型提供的扬声器实施例二的第二球顶与音圈的立体结构示意图；
图6为本实用新型提供的扬声器实施例二的第二球顶的立体结构示意图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本实用新型保护的范围。
实施例一：
请结合参阅图1至图4，本实用新型提供了一种扬声器100，所述扬声器100包括盆架10、设于所述盆架10内的磁路系统30及振动系统50。
所述磁路系统30包括磁碗31、设于所述磁碗31内的主磁钢33、设于所述主磁钢33上方的导磁板35、围设于所述主磁钢33四周的副磁钢37及设于所述副磁钢37上方的上夹板39。其中，所述主磁钢33与所述副磁钢37之间形成磁间隙。
所述振动系统50包括固定于所述盆架10上的折环51、固定于所述折环51中央的球顶53及连接于所述球顶53下方的音圈55。所述音圈55插入所述磁间隙并驱动所述球顶53振动发声。
所述球顶53包括依次叠设的第一球顶531和第二球顶533，且所述第一球顶531和所述第二球顶533通过热压或胶合的方式固定连接。并且双球的设置使得整个振动系统的强度得以提升。
所述第二球顶533包括本体部5331及自所述本体部5331向所述磁路系统30方向延伸的多个凸起5333。相邻所述凸起5333之间形成间隔101。需要说明的是，在本实施方式中，所述第二球顶533通过冲压的方式形成所述凸起5333，即所述本体部5331远离所述凸起5333的一侧对应形成与所述凸起5333相匹配的凹槽。此外，在所述凹槽内填充有泡棉、胶水、橡胶或木皮等阻尼材料，能够增加所述振动系统50的阻尼，实现对所述扬声器100性能的进一步调制。
所述本体部5331为圆角矩形结构，具体的，所述本体部5331包括相对设置的长轴边53311以及连接所述长轴边53311的短轴边53313，所述凸起5333设置于所述长轴边53311和/或所述短轴边53313的边缘，所述间隔101位于相邻两个所述凸起5333之间。当然，这不是对本实用新型的限定，在其他实施方式中，所述凸起5333也可以对应设置在所述本体部5331的转角处。
所述凸起5333包括靠近所述磁路系统30的底面53331及自所述本体部5331向所述磁路系统30方向延伸的侧壁面53333，所述侧壁面53333与所述底面53331共同围成所述凸起5333。在本实施方式中，所述侧壁面53333包括相对设置且向所述本体部5331几何中心倾斜的两条第一侧壁面53333a以及连接所述第一侧壁面53333a的第二侧壁面53333b，且两条所述第一侧壁面53333a所在的平面相交于所述本体部5331内部。
所述凸起5333的所述底面53331与所述音圈55相抵接并在所述间隔101的位置与所述第二球顶533之间形成泄漏通道102。通过设置所述泄漏通道102，使得所述音圈55中的气流能够通过所述泄漏通道102得到及时的流通，在所述振动系统50的振幅增大后能有效减小所述音圈55的内外气压差，避免了所述音圈55内外气压不平衡对所述扬声器100性能的影响。
优选的，在本实施方式中，所述凸起5333的数量为四个，分别位于所述本体部5331的两条所述长轴边53311和两条所述短轴边53313并分别与其所在的所述长轴边53311或所述短轴边53313平行。此外，位于所述长轴边53311的两个所述凸起5333沿所述短轴边53313的中垂线对称分布，位于所述短轴边53313的两个所述凸起5333沿所述长轴边53311的中垂线对称分布。通过如此设置，使得在所述第二球顶533上设置较少的所述凸起5333便能够实现所述音圈55与所述凸起5333的所述底面53331更牢固地胶合。
优选的，所述凸起5333的高度为10~3000um之间。高度为所述凸起5333自所述本体部5331向所述磁路系统30延伸的距离。高度过小，会导致所述音圈55与所述第二球顶533之间形成的所述泄漏通道102的尺寸过小，无法起到音圈55内气流及时、良好流通的效果。高度过大，会导致所述凸起5333占据过多原本放置所述音圈55的空间，进而限制所述音圈55的体积，不利于获得大的磁通量。
优选的，所述凸起5333的宽度为100~1000um之间，与通常情况下所述音圈55的厚度相匹配。若宽度过小，会导致所述音圈55与所述第二球顶533之间的胶合面积减小，所述音圈55不能牢固地粘接于所述第二球顶533，从而对整个所述扬声器100的可靠性产生影响。若宽度过大，虽然不会对所述音圈55的胶合产生明显的影响，但是，为所述凸起5333设置较大的宽度也是不必要的。
优选的，所述本体部5331的厚度为50~500um之间。将所述本体部5331的厚度控制在此范围，在保证所述第二球顶533与所述第一球顶531之间粘合效果的同时增强了整个球顶结构的强度。更优的，所述本体部5331的厚度为80~200um之间。
在上述结构的基础上，本实施方式中，所述第一球顶531为编织布、碳纤维、碳纤维与发泡材料的复合材料或为环氧树脂、聚醚醚酮、聚酰亚胺、聚苯硫醚、聚对苯撑苯并二恶唑、芳纶1414等预浸树脂材料，所述第二球顶533为铝合金、镁合金、镁锂合金或钛合金等合金材料或为铝箔或铜箔等与发泡材料的复合材料。其中，所述发泡材料为聚甲基丙烯酰亚胺、甲基环戊烯醇酮、发泡聚苯硫醚或发泡聚酰亚胺。
实施例二
请结合参阅图5和图6，本实施例提供的所述扬声器的结构与实施例一的所述扬声器100的结构基本相同，不同点在于，所述凸起5333’包括自所述本体部向所述磁路系统方向延伸的侧壁面53331’以及靠近所述磁路系统的底面53333’，所述侧壁面53331’与所述底面53333’共同围成所述凸起5333’，所述侧壁面53331’中相对设置的两条所述侧壁面53331’相互平行。也就是说，相较于实施例一，本实施例中的相对的两条所述侧壁面53331’均为相互平行。且四个所述凸起5333’分别与其所在的所述长轴边53311’或所述短轴边53313’平行，位于所述长轴边53311’的两个所述凸起5333’沿所述短轴边53313’的中垂线对称分布，位于所述短轴边53313’的两个所述凸起5333’沿所述长轴边53311’的中垂线对称分布，相邻两个凸起5333’之间不相连，设有间隔101’。所述音圈55’与所述凸起5333’的所述底面53333’相抵接并在所述凸起5333’形成间隔101’的位置与所述第二球顶533’之间形成泄漏通道102’。
与相关技术相比，本实用新型的扬声器，通过在所述第一球顶与所述音圈之间设置所述第二球顶，并在所述第二球顶设置所述凸起，所述音圈通过多个所述凸起之间的间隙形成利于气流流通的泄漏通道，使得音圈中的气流能够通过所述泄漏通道得到及时的流通，在振动系统振幅增大后能有效减小音圈的内外气压差，避免了音圈内外气压不平衡对扬声器性能的影响；同时，相对于所述音圈与所述第一球顶直接抵接的情况来说，所述凸起的设置虽然占据了部分原本放置音圈的空间，然而音圈变矮变粗，减小了所述扬声器厚度的同时使得磁通量得以提升；此外，单一球顶虽然通过设置向磁路系统方向延伸的凸起在不增加球顶厚度的同时增强了球顶强度，然而在凸起所对应的凹槽中不进行材料填充的情况下，球顶在凸起位置的结构强度很难得到保证。因此，第一球顶与第二球顶相配合的设置也保证了球顶的凹槽在不填充阻尼材料情况下的结构强度，使得所述振动系统本身的结构强度得到增强，使所述扬声器在微型化的情况下依然能够保持良好、可靠的性能。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (11)

  1. 一种扬声器，包括盆架、设于所述盆架内的磁路系统及振动系统，所述振动系统包括固定于所述盆架上的折环、固定于所述折环中央的球顶及连接于所述球顶下方的音圈，其特征在于，所述球顶包括依次叠设的第一球顶和第二球顶，所述第二球顶包括本体部及自所述本体部向所述磁路系统方向延伸的多个凸起，相邻所述凸起之间形成间隔，所述凸起包括靠近所述磁路系统的底面，所述音圈与所述底面相抵接并在所述间隔的位置与所述第二球顶之间形成泄漏通道。
  2. 根据权利要求1所述的扬声器，其特征在于，所述本体部为圆角矩形结构，所述本体部包括相对设置的长轴边以及连接所述长轴边的短轴边，所述凸起设于所述长轴边和/或所述短轴边的边缘，所述间隔位于相邻两个所述凸起之间。
  3. 根据权利要求2所述的扬声器，其特征在于，所述凸起还包括自所述本体部向所述磁路系统方向延伸的侧壁面，所述侧壁面与所述底面共同围成所述凸起，所述侧壁面包括相对设置且向所述本体部几何中心倾斜的两条第一侧壁面以及连接所述第一侧壁面的第二侧壁面，两条所述第一侧壁面所在的平面相交于所述本体部内部。
  4. 根据权利要求2所述的扬声器，其特征在于，所述凸起还包括自所述本体部向所述磁路系统方向延伸的侧壁面，所述侧壁面与所述底面共同围成所述凸起，所述侧壁面中相对设置的两条所述侧壁面相互平行。
  5. 根据权利要求3或4所述的扬声器，其特征在于，所述凸起的数量为四个，分别沿所述长轴边的中垂线和/或所述短轴边的中垂线对称分布。
  6. 根据权利要求5所述的扬声器，其特征在于，四个所述凸起分别与其所在的所述长轴边或所述短轴边平行。
  7. 根据权利要求6所述的扬声器，其特征在于，所述凸起的高度为10~3000um。
  8. 根据权利要求6所述的扬声器，其特征在于，所述凸起的宽度为100~1000um。
  9. 根据权利要求7或8所述的扬声器，其特征在于，所述本体部的厚度为50~500um。
  10. 根据权利要求1所述的扬声器，其特征在于，所述第一球顶为编织布、碳纤维、碳纤维与发泡材料的复合材料或为环氧树脂、聚醚醚酮、聚酰亚胺、聚苯硫醚、聚对苯撑苯并二恶唑、芳纶1414等预浸树脂材料，所述第二球顶为铝合金、镁合金、镁锂合金或钛合金等合金材料或为铝箔或铜箔等与发泡材料的复合材料。
  11. 根据权利要求1所述的扬声器，其特征在于，所述第二球顶通过冲压的方式形成所述凸起，所述本体部远离所述凸起的一侧对应形成与所述凸起相匹配的凹槽，所述凹槽内填充有泡棉、胶水、橡胶或木皮等阻尼材料。
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