WO2017000504A1 - 微型扬声器 - Google Patents

微型扬声器 Download PDF

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Publication number
WO2017000504A1
WO2017000504A1 PCT/CN2015/096964 CN2015096964W WO2017000504A1 WO 2017000504 A1 WO2017000504 A1 WO 2017000504A1 CN 2015096964 W CN2015096964 W CN 2015096964W WO 2017000504 A1 WO2017000504 A1 WO 2017000504A1
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WO
WIPO (PCT)
Prior art keywords
housing
casing
sealing member
edge
microspeaker
Prior art date
Application number
PCT/CN2015/096964
Other languages
English (en)
French (fr)
Inventor
王志兵
陈钢
邵明辉
刘光磊
Original Assignee
歌尔声学股份有限公司
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 歌尔声学股份有限公司 filed Critical 歌尔声学股份有限公司
Priority to US15/740,440 priority Critical patent/US10341780B2/en
Publication of WO2017000504A1 publication Critical patent/WO2017000504A1/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
    • 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • 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

Definitions

  • the utility model relates to the technical field of electroacoustic products, in particular to a miniature speaker.
  • Micro-speakers are important acoustic components of portable electronic devices used to convert electrical and acoustic signals. They are energy conversion devices.
  • Existing microspeakers typically include a housing that is typically formed by combining at least two housings that house a vibration system and a magnetic circuit system in a space enclosed by the housings.
  • the sealing combination between the shells is usually achieved by ultrasonic welding or glue sealing, which can meet the basic waterproof requirements of the micro-speakers.
  • ultrasonic welding or glue sealing which can meet the basic waterproof requirements of the micro-speakers.
  • micro-speakers which are the main acoustic components of portable electronic devices, are easily damaged by water droplets entering from the sound-emitting holes because they are installed at the sound holes of the portable electronic device. Therefore, the waterproof requirement for the micro-speaker has also been improved.
  • Micro-speakers with soldered or glued seals cannot pass this pressure-resistant waterproof test. At the same time, the two sealing methods still have the following defects:
  • Ultrasonic welding seals as the volume of micro-speakers continues to shrink, the setting of the ultrasonic structure is limited, and the selection margin is small, which may lead to instability of the ultrasonic state, mainly manifested by poor local ultrasonic conditions resulting in poor sealing.
  • Glue seal low production efficiency, difficult to control the state, prone to local cracking and other defects, poor sealing and easy to produce overflow, resulting in a micro-speaker's appearance is not beautiful.
  • the technical problem to be solved by the present invention is to provide a miniature The speaker, which has good sealing between the micro-speaker housings, can pass the high-pressure waterproof test.
  • the technical solution of the present invention is:
  • a micro-speaker comprising a first housing and a second housing combined together, wherein a space surrounded by the first housing and the second housing houses a vibration system and a magnetic circuit system, a side wall of the combined end of the second housing and the first housing surrounds an outer circumference of the first housing, an outer edge of the first housing and an inner side of the side wall of the second housing A sealing gap is provided therebetween; the microspeaker further includes a sealing member covering the outer side of the first casing, and an edge portion of the sealing member is located in the sealing gap.
  • the portion of the first casing corresponding to the vibration system is provided with a steel sheet
  • the sealing member covers the outer side of the steel sheet
  • the melting temperature of the material of the sealing member is lower than the first shell The melting temperature of the material of the body and the second casing.
  • an outer surface of the first housing is lower than an end surface of the side wall of the second housing, and an outer surface of the sealing member is flush with an end surface of the side wall of the second housing .
  • the sealing member is formed by an injection molding process after the first housing and the second housing are combined.
  • the edge portion of the inner side of the first housing is provided with a recessed portion, and a recessed space is formed between the recessed portion and the second housing.
  • the inner side of the side wall of the second casing is provided with a joint portion of the ring structure, and the inner side of the first casing is provided with an ultrasonic line ultrasonically coupled to the second casing corresponding to the position of the joint portion.
  • the material of the sealing member is one of silica gel, TPU, TPC or TPR.
  • the magnetic circuit system includes a magnetic conductive plate, and the inner magnet and the side magnet are fixed on the magnetic conductive plate, and the inner magnet and the side magnet are respectively fixed with the inner washer and the side washer, the side
  • the support is a ring-shaped structure, and the opposite side edges of the edge of the edge are provided with a support portion extending toward the magnetic conductive plate, and an edge of the magnetic conductive plate is provided corresponding to the position of the support portion.
  • the end of the support is fitted with a gap.
  • the vibration system includes a vibration assembly combined with the second housing, the vibration assembly is fixed with a voice coil on a side of the magnetic circuit system, the vibration assembly includes a silicone diaphragm, and the vibration The film is bonded to the second housing by an injection molding process.
  • the position of the lead wire corresponding to the voice coil on the magnetic conductive plate is provided with a recessed relief portion.
  • the microspeaker of the present invention includes a first housing and a second housing that are joined together, a side wall of the combined end of the second housing and the first housing surrounds the outer circumference of the first housing, outside the first housing A sealing gap is provided between the edge and the inner side of the side wall of the second housing; the microspeaker further includes a sealing member covering the outer side of the first housing, and the edge portion of the sealing member is located in the sealing gap.
  • a sealing member is added between the first casing and the second casing, and the sealing member can completely fill the gap between the first casing and the second casing, thereby compensating for the defect of partial sealing between the two. Effectively enhances the sealing performance between the two.
  • the micro-speaker of the utility model can completely pass the high-pressure waterproof test to meet the high requirements of the waterproof performance of the micro-speaker.
  • the sealing member covers the outer side of the steel sheet, and the melting temperature of the material of the sealing member is lower than the melting temperature of the material of the first casing and the second casing.
  • the steel sheet reduces the overall thickness of the micro-speaker while satisfying the strength of the micro-speaker housing, and the melting temperature of the material of the sealing member is lower than the melting temperature of the material of the housing, that is, the material of the sealing member is soft and has certain elasticity and Compressibility, which can be used as a buffer when the micro-speaker is installed in a portable electronic device, so that the micro-speaker is closely connected with the portable electronic device, and the water droplet entering from the sound hole is more effectively prevented from entering the portable electronic device, thereby improving The waterproof performance of portable electronic devices.
  • the sealing member is directly injection-molded on the first casing and the second casing, which enhances the bonding strength of the sealing member with the first casing and the second casing, and further improves the sealing performance of the micro-speaker and reduces the micro-capacity
  • the difficulty of assembling the speaker improves the production efficiency and the appearance degree.
  • the inner side of the side wall of the second casing is provided with a joint portion of the ring structure, and the inner side of the first casing is provided with an ultrasonic line ultrasonically coupled to the second casing at a position corresponding to the joint portion.
  • the setting of the ultrasonic wire can make the first casing and the second casing fully fit when ultrasonically combined, thereby improving the bonding strength between the two casings, and effectively preventing the injection of the plastic when the sealing member is injection molded. Entering the inner cavity of the micro-speaker ensures the acoustic performance of the micro-speaker and improves the yield of the product.
  • the micro-speaker of the utility model solves the technical problems that the micro-speaker of the prior art has poor sealing performance and cannot meet the high waterproof requirement, and the micro-speaker of the utility model has high sealing performance and can pass the high-pressure waterproof test at the same time. High production efficiency and beautiful appearance.
  • FIG. 1 is a schematic exploded view of the microspeaker of the present invention
  • Figure 2 is a combination view of Figure 1;
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • the inner finger referred to in this specification refers to the side near the center of the housing, and the outer side refers to the side away from the center of the housing.
  • a miniature speaker is a rectangular structure including a casing composed of a first casing 10 and a second casing 20 which are combined together, the first casing 10 and A vibration system and a magnetic circuit system are housed in a space surrounded by the second casing 20
  • the vibrating system separates the inner cavity of the microspeaker into two cavities, a front acoustic cavity and a rear acoustic cavity.
  • the first housing 10 and the second housing 20 are both injection molded housings.
  • the position of the first housing 10 corresponding to the vibration system is injection-molded with a steel sheet 70.
  • the steel sheet 70 effectively reduces the overall height of the micro-speaker while ensuring the strength of the first housing 10, thereby making it more suitable for thinning development. Need.
  • the second housing 20 is an annular structure with open ends.
  • the first housing 10 is coupled to one end of the second housing 20 near the front acoustic chamber, and the second housing 20 is at the side of the end.
  • the wall surrounds the outer circumference of the first housing 10, the outer surface of the first housing 10 is lower than the end surface of the side wall of the second housing 20, and the outer edge of the first housing 10 and the side wall of the second housing 20
  • An annular sealing gap is provided between the inner sides.
  • the microspeaker further includes a sealing member 50, the sealing member 50 is wrapped around the outer side of the first housing 10, and the edge portion of the sealing member 50 is located in the sealing gap, and the outer surface of the first housing 10 and the side wall of the second housing 20
  • the distance between the end faces should be lower than the minimum thickness of the sealing member 50, generally 0.1 mm or more, and the outer surface of the sealing member 50 after being joined is flush with the end faces of the side walls of the second casing 20.
  • An acoustic hole 22 is disposed on one side wall of the second casing 20, and the sound hole 22 communicates with the front sound chamber, and the side wall of the sound hole 22 is provided with a large height and upward convex, the first shell
  • the body 10 is provided with an upward convex portion 14 corresponding to the position of the sound hole 22.
  • the sealing member 50 is provided with an opening corresponding to the position of the convex portion 14, and the convex portion 14 is exposed outside the opening.
  • the sealing member 50 is formed by an injection molding process after the first housing 10 and the second housing 20 are combined.
  • the melting temperature of the material of the sealing member 50 is lower than the melting temperature of the material of the first casing 10 and the second casing 20.
  • the material of the sealing member 50 is preferably silica gel or TPU (Thermoplastic polyurethanes).
  • TPU Thermoplastic polyurethanes
  • TPC Thermoplastic Composites
  • TPR Thermoplastic Rubber
  • the inner side of the side wall of the second casing 20 is provided with a joint portion 24 of a ring-shaped structure, and the surface of the joint portion 24 is lower than the end surface of the side wall.
  • An inner side of the first housing 10 corresponding to the joint portion 24 is provided with an annular ultrasonic wire 12, and the first housing 10 and the second housing 20 are combined by an ultrasonic welding process.
  • the arrangement of the ultrasonic wire 12 can make the first casing 10 and the second casing 20 fully fit when combined, which can prevent the injection molding plastic from flowing into the front acoustic cavity when the sealing member 50 is injection molded, thereby ensuring that the acoustic performance of the micro-speaker is not affected. .
  • the inner portion of the first casing 10 is in contact with the joint portion 24, and the edge portion is provided with a recess portion 16, that is, the thickness of the edge portion of the first casing 10 is smaller than the thickness of the other portion, and the recess portion 16 and the joint portion are formed.
  • a glue space is formed between the 24, and the arrangement of the recess 16 increases the space of the seal gap between the first housing 10 and the second housing 20, thereby increasing the seal 50 and the first housing 10 and the second
  • the contact area of the housing 20 enhances the sealing property, and the sealing member 50 located between the recessed portion 16 and the joint portion 24 is pressed against the inner side of the first housing 10, effectively preventing the sealing member 50 from being removed from the first housing
  • the probability of falling off between the 10 and the second casing 20 improves the stability of the waterproof performance of the microspeaker.
  • the vibration system includes a vibration assembly and a voice coil 34.
  • the vibration assembly includes an annular diaphragm 32 whose outer edge is injection-molded with the second housing 20.
  • the diaphragm 32 is a silicone diaphragm, and includes a vibration.
  • the inner edge of the membrane 32 is injection molded with the dome 30, and the voice coil 34 is secured to the side of the dome 30 adjacent the magnetic circuit system.
  • the magnetic circuit system includes a magnetic conductive plate 48.
  • the inner central portion of the magnetic conductive plate 48 is sequentially fixed with an inner magnet 46 and a inner washer 42.
  • the inner magnet 46 and the inner washer 42 are rectangular, and are located at the inner magnet 46 and the inner washer 42.
  • the edge positions of the magnetic conductive plates 48 on both sides of the long sides are respectively fixed with a strip-shaped side magnets 44.
  • the two side magnets 44 are fixedly fixed with an annular edge washer 40, and the outer dimensions of the edge washer 40 and the magnetic conductive plate 48 are respectively fixed.
  • the external dimensions are identical.
  • the inner magnet 46 and the inner washer 42 constitute an inner magnetic circuit of the magnetic circuit system
  • the side magnet 44 and the edge washer 40 constitute an outer magnetic circuit of the magnetic circuit system, and a magnetic gap is provided between the inner magnetic circuit and the outer magnetic circuit.
  • One end of the voice coil 34 is located in the magnetic gap, and the lead wire 340 of the voice coil 34 passes through the electrical connector 60 fixed to the lower end of the second casing 20 and the outside of the microspeaker.
  • the circuit is electrically connected, and the voice coil 34 reciprocates up and down in the magnetic gap according to the magnitude and direction of the acoustic electric signal transmitted from the electrical connector 60.
  • the diaphragm 32 and the dome 30 vibrate up and down with the up and down movement of the voice coil 34. Initiating the sound of the air to complete the energy conversion between the electroacoustics.
  • a middle portion of the side edges of the side ribs 40 corresponding to the two sides of the magnetic conductive plate 48 not provided with the outer magnets is respectively provided with a support portion 400 extending from the guide magnetic plate 48, and the support portion 400 is The edge of the Huashi 40 is vertical.
  • the two sides of the magnetic conductive plate 48 are respectively provided with a notch 482 corresponding to the position of the supporting portion 400.
  • the width of the notch 482 is consistent with the width of the supporting portion 400.
  • the depth of the notch 482 is consistent with the thickness of the supporting portion 400.
  • the end of the system assembly rear support portion 400 is fixed in the notch 482 to increase the strength of the magnetic circuit system.
  • the lead wires 340 of the voice coil 34 are routed along the short sides of the two sides thereof, and the positions of the magnetic wires 48 corresponding to the two lead wires 340 are respectively provided with a recessed relief portion 480, that is, the magnetic conductive plate 48.
  • Each of the two sides of the side magnet is provided with a relief portion 480.
  • the relief portion 480 can effectively avoid the collision between the lead wire 340 and the magnetic conductive plate 48 when the voice coil 34 moves up and down, thereby greatly reducing the noise of the micro speaker. Such as bad, effectively improve the acoustic performance of the micro-speaker.
  • the utility model greatly improves the waterproof performance of the micro-speaker by adding a soft seal between the two shells, so that it can meet the requirements of the high-pressure waterproof test, and at the same time, the micro-speaker is installed in the portable electronic device. It also plays a certain buffering role, which enables close fitting between the micro-speaker and the portable electronic device, which can further improve the waterproof performance of the portable electronic device; at the same time, the production efficiency and the appearance of the micro-speaker are improved.
  • the above embodiment of the present invention is merely an example of a technical solution in which a sealing member is added between two housings to improve waterproof performance, wherein the housing and internal structure of the micro speaker are not limited to those described in the above embodiments.
  • the number of the housings constituting the microspeaker housing is not limited to the above two housings, and may be three housings.
  • the novel technical solution can be applied to the sealing between any one of the micro-speaker housings, and the technical personnel of the present invention can apply the technical solution of the present invention to other structures without any creative labor according to the description of the above embodiments.
  • the speaker regardless of whether the other structure of the microspeaker is the same as the above embodiment, as long as the seal is added between the two housings, the products for improving the waterproof performance of the microspeaker fall within the protection scope of the present invention. Inside.
  • the names of the first housing and the second housing referred to in this specification are only for distinguishing technical features, and do not represent the positional relationship between the two, the assembly sequence, the working sequence, and the like.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Casings For Electric Apparatus (AREA)
  • Telephone Set Structure (AREA)

Abstract

一种微型扬声器，包括结合在一起的第一壳体（10）和第二壳体（20），所述第一壳体（10）和第二壳体（20）围成的空间内收容有振动系统和磁路系统，所述第二壳体（20）与所述第一壳体（10）相结合端的侧壁环绕在所述第一壳体（10）的外周，所述第一壳体（10）的外边缘与所述第二壳体（20）的所述侧壁的内侧之间设有密封间隙；所述微型扬声器还包括一密封件（50），所述密封件（50）覆盖于所述第一壳体（10）的外侧，且所述密封件（50）的边缘部位于所述密封间隙内。

Description

微型扬声器 技术领域
本实用新型涉及电声产品技术领域，特别涉及一种微型扬声器。
背景技术
微型扬声器是便携式电子设备的重要声学部件，用于完成电信号与声音信号之间的转换，是一种能量转换器件。现有的微型扬声器通常包括外壳，外壳通常由至少两个壳体结合而成，各壳体共同围成的空间内收容有振动系统和磁路系统。目前，各壳体之间的密封结合通常是采用超声焊接密封或涂胶密封来实现，此两种工艺可以满足微型扬声器的基本防水要求。但是随着电子技术的不断发展，人们对便携式电子设备的各项功能要求越来越高，其中对防水的要求就作了很大的提高。
随着人们对便携式电子设备防水要求的不断提升，作为便携式电子设备的主要声学部件的微型扬声器由于其安装在便携式电子设备的出声孔处，很容易受到从出声孔处进入的水滴的损伤，因此，对微型扬声器的防水要求也作了提升，在对微型扬声器进行防水测试时将其所要承受的水压提高了5bar(压强单位，1bar＝0.1MPa)，这就使得现有的通过超声焊接密封或胶粘密封的微型扬声器无法通过此压强的防水测试。同时，此两种密封方式还存在以下不良：
超声焊接密封，随着微型扬声器体积的不断缩小，超声结构的设置受到了限制，选择余量小，会导致超声状态不稳定，主要表现为局部区域超声状态不好导致密封性差。
涂胶密封，生产效率低，状态难以控制，容易产生局部开裂等不良，密封性较差且易产生溢胶，导致微型扬声器的外形不美观。
实用新型内容
针对以上缺陷，本实用新型所要解决的技术问题是提供一种微型 扬声器，此微型扬声器壳体之间密封性好，能够通过高压强的防水测试。
为解决上述技术问题，本实用新型的技术方案是：
一种微型扬声器，包括结合在一起的第一壳体和第二壳体，所述第一壳体和所述第二壳体围成的空间内收容有振动系统和磁路系统，所述第二壳体与所述第一壳体相结合端的侧壁环绕在所述第一壳体的外周，所述第一壳体的外边缘与所述第二壳体的所述侧壁的内侧之间设有密封间隙；所述微型扬声器还包括一密封件，所述密封件覆盖于所述第一壳体的外侧，且所述密封件的边缘部位于所述密封间隙内。
其中，所述第一壳体上对应所述振动系统的部位设有钢片，所述密封件覆盖在所述钢片的外侧，所述密封件的材质的熔融温度低于所述第一壳体和所述第二壳体的材质的熔融温度。
其中，所述第一壳体的外表面低于所述第二壳体的所述侧壁的端面，所述密封件的外表面与所述第二壳体的所述侧壁的端面齐平。
其中，所述密封件在所述第一壳体与所述第二壳体结合后通过注塑工艺成型。
其中，所述第一壳体的内侧的边缘部位设有凹陷部，所述凹陷部与所述第二壳体之间形成容胶空间。
其中，所述第二壳体的侧壁内侧设有环台结构的结合部，所述第一壳体的内侧对应所述结合部的位置设有与所述第二壳体超声结合的超声线。
其中，所述密封件的材质为硅胶、TPU、TPC或TPR中的一种。
其中，所述磁路系统包括导磁板，所述导磁板上固定有内磁铁和边磁铁，所述内磁铁和所述边磁铁上分别固定有内华司和边华司，所述边华司为环状结构，所述边华司相对的两侧边缘部设有向所述导磁板延伸的支撑部，所述导磁板的边缘对应所述支撑部的位置设有与所述支撑部的端部相适配的缺口。
其中，所述振动系统包括与所述第二壳体相结合的振动组件，所述振动组件靠近所述磁路系统的一侧固定有音圈，所述振动组件包括硅胶振膜，所述振膜与所述第二壳体通过注塑工艺结合。
其中，所述导磁板上对应所述音圈的引线的位置设有下陷的避让部。
采用了上述技术方案后，本实用新型的有益效果是：
由于本实用新型微型扬声器包括结合在一起的第一壳体和第二壳体，第二壳体与第一壳体相结合端的侧壁环绕在第一壳体的外周，第一壳体的外边缘与第二壳体的侧壁的内侧之间设有密封间隙；微型扬声器还包括一密封件，密封件覆盖于第一壳体的外侧，且密封件的边缘部位于密封间隙内。在第一壳体与第二壳体之间增设了一个密封件，密封件可将第一壳体与第二壳体之间的缝隙完全填充，弥补了二者之间局部密封不良的缺陷，有效的增强了二者之间的密封性能。增加了密封件后，本实用新型微型扬声器完全可以通过高压强的防水测试，满足人们对微型扬声器防水性能的高要求。
由于第一壳体上对应振动系统的部位设有钢片，密封件覆盖在钢片的外侧，密封件的材质的熔融温度低于第一壳体和第二壳体的材质的熔融温度。钢片在满足微型扬声器壳体强度的同时降低了微型扬声器的整体厚度，同时密封件的材质的熔融温度低于壳体的材质的熔融温度，即密封件的材质较软，具有一定的弹性和可压缩性，可以在微型扬声器安装到便携式电子设备中时起到缓冲作用，使得微型扬声器与便携式电子设备紧密连接，更加有效的防止了从出声孔进入的水滴进入到便携式电子设备内部，提高了便携式电子设备的防水性能。
由于密封件在第一壳体与第二壳体结合后通过注塑工艺成型。密封件直接注塑结合在第一壳体与第二壳体上，增强了密封件与第一壳体和第二壳体的结合强度，同时进一步的提高了微型扬声器的密封性能，且降低了微型扬声器的组装难度，提高了生产效率和外形的美观 度。
第二壳体的侧壁内侧设有环台结构的结合部，第一壳体的内侧对应结合部的位置设有与第二壳体超声结合的超声线。超声线的设定可使得第一壳体与第二壳体在超声结合时能够充分贴合，提高了两个壳体之间的结合强度，同时还可有效的防止在注塑密封件时注塑料进入到微型扬声器的内腔，从而保证了微型扬声器的声学性能，提高了产品的合格率。
综上所述，本实用新型微型扬声器解决了现有技术中微型扬声器密封性差，不能满足较高的防水要求等技术问题，本实用新型微型扬声器密封性高，能够通过高压强的防水测试，同时生产效率高，外形美观。
附图说明
图1是本实用新型微型扬声器的分解结构示意图；
图2是图1的组合图；
图3是图2的A-A线剖视图；
图中：10、第一壳体，12、超声线，14、凸起部，16、凹陷部，20、第二壳体，22、出声孔，24、结合部，30、球顶，32、振膜，34、音圈，340、引线，40、边华司，400、支撑部，42、内华司，44、边磁铁，46、内磁铁，48、导磁板，480、避让部，482、缺口，50、密封件，60、电连接件，70、钢片。
具体实施方式
下面结合附图和实施例，进一步阐述本实用新型。
本说明书中涉及到的内侧指靠近壳体中心的一侧，外侧指远离壳体中心的一侧。
如图1、图2和图3共同所示，一种微型扬声器，为矩形结构，包括外壳，外壳由结合在一起的第一壳体10和第二壳体20构成，第一壳体10和第二壳体20围成的空间内收容有振动系统和磁路系 统，振动系统将微型扬声器的内腔分隔为前声腔和后声腔两个腔体。第一壳体10和第二壳体20均为注塑壳体。第一壳体10上对应振动系统的位置注塑结合有钢片70，钢片70在保证了第一壳体10的强度的同时有效的降低了微型扬声器的整体高度，使其更加适应薄型化发展的需要。
如图1和图3共同所示，第二壳体20为两端开口的环状结构，第一壳体10结合在第二壳体20靠近前声腔的一端，第二壳体20该端的侧壁环绕在第一壳体10的外周，第一壳体10的外表面低于第二壳体20的侧壁的端面，且第一壳体10的外边缘与第二壳体20的侧壁的内侧之间设有环形的密封间隙。微型扬声器还包括一密封件50，密封件50包裹在第一壳体10的外侧，密封件50的边缘部位于密封间隙内，第一壳体10的外表面与第二壳体20的侧壁端面之间的距离应低于密封件50的最低厚度，一般为0.1mm以上，密封件50结合后其外表面与第二壳体20的侧壁的端面齐平。第二壳体20的一侧侧壁上设有出声孔22，出声孔22与前声腔连通，设有出声孔22位置的该侧侧壁高度较大，向上凸起，第一壳体10对应出声孔22的位置设有向上的凸起部14，密封件50对应凸起部14的位置设有开孔，凸起部14裸露在此开孔的外部。
如图3所示，密封件50在第一壳体10与第二壳体20结合后通过注塑工艺成型。密封件50的材质的熔融温度低于第一壳体10和第二壳体20的材质的熔融温度，本实施方式中密封件50的材质优选为硅胶、TPU(Thermoplastic polyurethanes，热塑性聚氨酯弹性体橡胶)、TPC(Thermoplastic Composites，热塑基复合材料)或TPR(Thermoplastic Rubber，热塑性橡胶)中的一种，但并不限于上述四种材料，只要是材质较软，具有压缩性及弹性，且可通过注塑工艺成型的材料均可以作为密封件50的材料。材质较软的密封件50覆盖在钢片70的外侧，可以起到缓冲的作用，能够使得微型扬声器 与便携电子设备结合得更加紧密。
如图1所示，第二壳体20的侧壁内侧设有环台结构的结合部24，结合部24的表面低于侧壁的端面。第一壳体10的内侧对应结合部24的位置设有环形的超声线12，第一壳体10与第二壳体20通过超声焊接工艺结合。超声线12的设置可使得第一壳体10与第二壳体20在结合时充分贴合，可防止注塑密封件50时注塑料流到前声腔内，保证了微型扬声器的声学性能不受影响。
如图3所示，第一壳体10内侧与结合部24相接触的边缘部位设有凹陷部16，即第一壳体10的边缘部位的厚度小于其它部位的厚度，凹陷部16与结合部24之间形成了容胶空间，凹陷部16的设置增加了第一壳体10与第二壳体20之间的密封间隙的空间，从而增加了密封件50与第一壳体10和第二壳体20的接触面积，增强了密封性，且位于凹陷部16与结合部24之间的密封件50被压在第一壳体10的内侧，有效的防止了密封件50从第一壳体10与第二壳体20之间脱落的机率，提高了微型扬声器防水性能的稳定性。
如图1和图3共同所示，振动系统包括振动组件和音圈34，振动组件包括外边缘与第二壳体20注塑结合的环形振膜32，振膜32为硅胶振膜，还包括与振膜32的内边缘注塑结合的球顶30，音圈34固定在球顶30靠近磁路系统的一侧。磁路系统包括导磁板48，导磁板48的内侧中部依次固定有内磁铁46和内华司42，内磁铁46和内华司42均为长方形，位于内磁铁46和内华司42的长边的两侧的导磁板48的边缘位置分别固定有一条状边磁铁44，两条边磁铁44上共同固定有一环形的边华司40，边华司40的外部尺寸与导磁板48的外部尺寸相一致。内磁铁46和内华司42构成磁路系统的内磁路，边磁铁44和边华司40构成磁路系统的外磁路，内磁路与外磁路之间设有磁间隙。音圈34的一端位于磁间隙内，音圈34的引线340通过固定在第二壳体20下端的电连接件60与微型扬声器外 部电路电连接，音圈34根据电连接件60传输过来的声波电信号的大小和方向在磁间隙内做往复的上下运动，振膜32和球顶30随着音圈34的上下运动上下振动，策动空气发声，从而完成电声之间的能量转换。
如图1所示，与导磁板48上未设有外磁铁的两侧相对应的边华司40的两侧边缘的中部分别设有一向导磁板48延伸的支撑部400，支撑部400与边华司40相垂直。导磁板48的该两侧边缘对应支撑部400的位置分别设有一缺口482，缺口482的宽度与支撑部400的宽度相一致，缺口482的深度与支撑部400的厚度相一致，在磁路系统组合后支撑部400的端部固定在缺口482内，可增加磁路系统的强度。
如图1所示，音圈34的引线340沿其两侧短边处走线，导磁板48上对应两根引线340走线的位置分别设有一下陷的避让部480，即导磁板48未设有边磁铁的两侧各设有一避让部480，避让部480可有效的避免在音圈34上下运动时引线340与导磁板48发生碰撞的现象，从而大大的减少了微型扬声器的杂音等不良，有效的提高了微型扬声器的声学性能。
本实用新型通过在两个壳体之间增设一个软质的密封件，大大的提升了微型扬声器的防水性能，使得其能够满足高压强防水测试的要求，同时在微型扬声器安装到便携式电子设备中时还起到了一定的缓冲作用，使得微型扬声器与便携式电子设备之间能够紧密的贴合，可进一步的提高便携式电子设备的防水性能；同时还提高了微型扬声器的生产效率及外形的美观度。
本实用新型上述实施例仅是对本实用新型在两个壳体之间增设密封件来提升防水性能的技术方案的举例说明，其中微型扬声器的壳体及内部结构并不仅限于上述实施例中描述的结构，构成微型扬声器外壳的壳体数量也不限于上述的两个壳体，也可以是三个壳体，本实 用新型的技术方案可适用于任何一种微型扬声器壳体间的密封，本领域技术人员根据上述实施例的描述不需要付出任何创造性劳动就可将本实用新型的技术方案应用到其它结构的微型扬声器中，故无论微型扬声器的其它结构是否与上述实施例相同，只要是采用在两个壳体之间增设密封件，用以提高微型扬声器的防水性能的产品均落入本实用新型的保护范围内。
本说明书中涉及到的第一壳体和第二壳体的命名仅是为了区别技术特征，并不代表二者之间的位置关系，组装顺序及工作顺序等。
本实用新型不局限于上述具体的实施方式，本领域的普通技术人员从上述构思出发，不经过创造性的劳动，所做出的种种变换，均落在本实用新型的保护范围之内。

Claims (10)

  1. 微型扬声器，包括结合在一起的第一壳体和第二壳体，所述第一壳体和所述第二壳体围成的空间内收容有振动系统和磁路系统，其特征在于，所述第二壳体与所述第一壳体相结合端的侧壁环绕在所述第一壳体的外周，所述第一壳体的外边缘与所述第二壳体的所述侧壁的内侧之间设有密封间隙；所述微型扬声器还包括一密封件，所述密封件覆盖于所述第一壳体的外侧，且所述密封件的边缘部位于所述密封间隙内。
  2. 根据权利要求1所述的微型扬声器，其特征在于，所述第一壳体上对应所述振动系统的部位设有钢片，所述密封件覆盖在所述钢片的外侧，所述密封件的材质的熔融温度低于所述第一壳体和所述第二壳体的材质的熔融温度。
  3. 根据权利要求2所述的微型扬声器，其特征在于，所述第一壳体的外表面低于所述第二壳体的所述侧壁的端面，所述密封件的外表面与所述第二壳体的所述侧壁的端面齐平。
  4. 根据权利要求3所述的微型扬声器，其特征在于，所述密封件在所述第一壳体与所述第二壳体结合后通过注塑工艺成型。
  5. 根据权利要求4所述的微型扬声器，其特征在于，所述第一壳体的内侧的边缘部位设有凹陷部，所述凹陷部与所述第二壳体之间形成容胶空间。
  6. 根据权利要求2至5任一权利要求所述的微型扬声器，其特征在于，所述第二壳体的所述侧壁内侧设有环台结构的结合部，所述第一壳体的内侧对应所述结合部的位置设有与所述第二壳体超声结合的超声线。
  7. 根据权利要求6所述的微型扬声器，其特征在于，所述密封件的材质为硅胶、TPU、TPC或TPR中的一种。
  8. 根据权利要求7所述的微型扬声器，其特征在于，所述磁路系统包括导磁板，所述导磁板上固定有内磁铁和边磁铁，所述内磁铁 和所述边磁铁上分别固定有内华司和边华司，所述边华司为环状结构，所述边华司相对的两侧边缘部设有向所述导磁板延伸的支撑部，所述导磁板的边缘对应所述支撑部的位置设有与所述支撑部的端部相适配的缺口。
  9. 根据权利要求8所述的微型扬声器，其特征在于，所述振动系统包括与所述第二壳体相结合的振动组件，所述振动组件靠近所述磁路系统的一侧固定有音圈，所述振动组件包括硅胶振膜，所述振膜与所述第二壳体通过注塑工艺结合。
  10. 根据权利要求9所述的微型扬声器，其特征在于，所述导磁板上对应所述音圈的引线的位置设有下陷的避让部。
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