WO2020113742A1 - 发声装置和电子设备 - Google Patents

发声装置和电子设备 Download PDF

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Publication number
WO2020113742A1
WO2020113742A1 PCT/CN2018/125605 CN2018125605W WO2020113742A1 WO 2020113742 A1 WO2020113742 A1 WO 2020113742A1 CN 2018125605 W CN2018125605 W CN 2018125605W WO 2020113742 A1 WO2020113742 A1 WO 2020113742A1
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WIPO (PCT)
Prior art keywords
front cover
housing
opening
metal plate
generating device
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PCT/CN2018/125605
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English (en)
French (fr)
Inventor
翟成祥
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Goertek Inc
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Goertek Inc
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Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Publication of WO2020113742A1 publication Critical patent/WO2020113742A1/zh
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    • 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
    • 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

Definitions

  • the utility model relates to the technical field of sound energy conversion, in particular to a sound emitting device and electronic equipment.
  • the open end cover of the housing is provided with a front cover and a metal plate.
  • the metal plate 30' is provided on the front cover 20', and the metal plate 30' It is integrally injection-molded with the front cover 20' as an insert. Since the metal plate 30' also has better strength when it is thinner, it can play a better role in protecting the vibration system together with the front cover 20'. However, since the metal plate 30' is injection-molded with the front cover 20' as an insert, the metal plate 30' needs to be inserted into the mold every time it is injection-molded, and the operation is complicated, resulting in a great increase in cost.
  • the main purpose of the utility model is to propose a sounding device, aiming to reduce the production cost.
  • the sound generating device proposed by the present invention includes:
  • the shell has an opening
  • the vibration system is set in the housing
  • a front cover the cover is provided at the opening of the housing, the front cover is a metal piece, and the front cover is a ring structure with an opening in the middle, and the inner peripheral wall of the front cover is in a direction close to the housing Ascending multi-stage ladder-like setting;
  • the metal plate is glued or laser welded to the surface of the front cover facing away from the housing, and is arranged to cover the middle opening of the front cover, and the metal plate is provided corresponding to the middle opening of the front cover Sound hole.
  • the vibration system includes a diaphragm, the diaphragm includes a central portion, a folded ring portion disposed around the central portion, and a fixed portion disposed around the folded ring portion, the fixed portions are respectively
  • the front cover is bonded to the housing.
  • the front cover has an adhesive surface facing the housing, the adhesive surface is bonded to the fixing portion, and the projection of the adhesive surface on the fixing portion is located in the fixing portion .
  • the inner peripheral wall of the front cover includes a plurality of stepped surfaces, the plurality of stepped surfaces are arranged along an opening direction of the middle opening of the front cover, and the stepped surfaces are along the middle opening of the front cover
  • a plurality of the stepped surfaces include a first stepped surface connected to the adhesive surface, and the first stepped surface gradually extends outward in a direction close to the housing.
  • the housing has a supporting surface disposed around the opening of the housing, the supporting surface faces the bonding surface and is bonded to the fixing portion, and the inner edge of the supporting surface is The inside edge of the bonding surface is flush.
  • the projection area of the middle opening of the front cover on the diaphragm is larger than the area of the central portion.
  • the front cover is made of copper.
  • the metal plate is a steel plate.
  • the front cover and the metal plate are bonded by glue or double-sided adhesive.
  • the utility model also proposes an electronic device, including a sound-generating device.
  • the sound-generating device includes:
  • the shell has an opening
  • the vibration system is set in the housing
  • the front cover is provided to cover the opening of the housing.
  • the front cover is a metal part, and the front cover is a ring structure with an intermediate opening.
  • the inner peripheral wall of the front cover is Ascending multi-stage ladder-like setting;
  • the metal plate is adhered to the surface of the front cover facing away from the housing, and covers the middle opening of the front cover.
  • the metal plate and the middle opening of the front cover are provided with sound holes.
  • the technical solution of the utility model divides the front cover and the metal plate into two independent parts, and the metal plate and the front cover are bonded or laser welded, only the front cover and the metal plate are processed separately, and then the metal plate and the metal plate are processed separately.
  • the front cover can be fixed.
  • the scheme of the utility model is simpler and more convenient.
  • the production cost of the sounding device can be greatly reduced.
  • the inner peripheral wall of the front cover is arranged in a multistage stepped manner in the direction close to the housing, the wall thickness of the front cover gradually increases, which can increase the strength of the front cover.
  • the inner peripheral wall of the front cover gradually avoids the connection between the folding ring part and the fixing part of the diaphragm, which makes the vibration space of the diaphragm larger, and can ensure that the diaphragm has a better vibration effect.
  • the area of the surface of the front cover facing away from the housing is greater, and the contact area between the front cover and the metal plate is greater, which can enhance the bonding effect of the front cover and the metal plate, making the bonding of the metal plate more stable.
  • FIG. 1 is a schematic structural view of an example sound-generating device
  • FIG. 2 is a schematic structural diagram of an embodiment of a sound-generating device of the present invention.
  • FIG. 3 is an enlarged view at A in FIG. 2.
  • the directional indicator is only used to explain a specific posture (as shown in the figure (Shown) the relative positional relationship between the various components, the movement, etc., if the specific posture changes, the directional indication will change accordingly.
  • first”, “second”, etc. are for descriptive purposes only, and cannot be understood as instructions or It implies its relative importance or implicitly indicates the number of technical features indicated.
  • the features defined with “first” and “second” may include at least one of the features either explicitly or implicitly.
  • the meaning of “and/or” appearing throughout the text is to include three parallel plans, taking “A and/or B as an example”, including plan A, or plan B, or plans that both A and B satisfy.
  • technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this utility model.
  • the utility model proposes a sound-emitting device, which is used in electronic equipment, wherein the electronic equipment may be a mobile phone, a tablet computer, a headset or other equipment capable of sound-producing.
  • the sound generating device includes:
  • the housing 10 has an opening;
  • the vibration system is set in the housing 10;
  • the front cover 20 is provided at the opening of the housing 10, the front cover 20 is a metal piece, and the front cover 20 is a ring structure with an intermediate opening. In the direction close to the housing 10, the inner peripheral wall of the front cover 20 is much raised Stepped setting; and
  • the metal plate 30 is adhered to the surface of the front cover 20 facing away from the housing 10 and covers the middle opening of the front cover 20.
  • the sound hole 31 is provided on the metal plate 30 and corresponding to the middle opening of the front cover 20.
  • the metal plate may also be laser welded to the surface of the front cover 20 facing away from the housing 10.
  • the sound hole 31 communicates with the middle opening of the front cover 20, and the sound generated by the vibration of the vibration system can be transmitted through the sound hole 31.
  • the shape of the front cover 20 can be various, for example, the front cover 20 has a circular ring shape, a square ring shape, or other types of ring structures.
  • the inner peripheral wall of the front cover 20 is arranged in a multi-stage stepped manner in the direction close to the housing 10, specifically, the inner diameter of the front cover 20 gradually becomes larger in the direction close to the housing 10, Therefore, the vibration space near the diaphragm 40 is made larger to meet the requirement of the vibration space of the diaphragm 40.
  • the inner peripheral wall of the front cover 20 may have two steps, three steps, or more steps.
  • the metal plate 30 ′ and the front cover 20 ′ are integrally injection-molded by an injection mold, and the metal plate 30 ′ is first placed in the injection mold as an insert, which makes the structure of the mold more complicated
  • the cost of the mold is high, and during injection molding, the metal plate 30' needs to be inserted into the mold for each molding, which complicates the operation and greatly increases the production cost.
  • the front cover 20 and the metal plate 30 are divided into two separate parts, and the metal plate 30 and the front cover 20 are bonded, and only the front cover 20 and the metal plate 30 is processed separately, and then the metal plate 30 and the front cover 20 can be bonded.
  • the connection by the bonding method is simpler and more convenient.
  • the production cost of the sounding device can be greatly reduced.
  • the inner peripheral wall of the front cover 20 is arranged in a multistage stepped manner in the direction close to the housing 10, the wall thickness of the front cover 20 gradually increases, and the strength of the front cover 20 can be increased.
  • the inner peripheral wall of the front cover 20 gradually avoids the connection between the folded portion 42 and the fixing portion 41 of the diaphragm 40, so that the vibration space of the diaphragm 40 is larger, and the diaphragm 40 can be guaranteed to have a better Vibration effect.
  • the area of the surface of the front cover 20 facing away from the housing 10 is greater, and the contact area of the front cover 20 and the metal plate 30 is greater, which can enhance the bonding effect of the front cover 20 and the metal plate 30, making the metal plate 30 bonding is more stable.
  • the vibration system includes a diaphragm 40.
  • the diaphragm 40 includes a central portion 43, a folded ring portion 42 disposed around the central portion 43, and a fixed portion 41 disposed around the folded ring portion 42.
  • the fixed portion 41 is clamped to the front cover 20 and the housing 10, and the fixing portion 41 is adhered to the front cover 20 and the housing 10, respectively.
  • the fixed portion 41 is the outer peripheral portion of the diaphragm 40, and the folded portion 42 and the center portion 43 are connected to each other in order toward the center of the diaphragm 40.
  • the front cover 20 has an adhesive surface 21 facing the housing 10.
  • the adhesive surface 21 is bonded to the fixing portion 41.
  • the projection of the adhesive surface 21 on the fixing portion 41 is located in the fixing portion 41.
  • the projected area of the adhesive surface 21 on the fixing portion 41 is smaller than the area of the fixing portion 41.
  • the housing 10 has a supporting surface 11 surrounding the opening of the housing 10.
  • the supporting surface 11 is disposed toward the adhesive surface 21 and is bonded to the fixing portion 41.
  • the inner edge of the adhesive surface 21 and the supporting surface 11 The inside edge of the is flush.
  • the contact area of the fixing portion 41 and the adhesive surface 21 is larger than the contact area of the fixing portion 41 and the supporting surface 11, In this way, the connection between the fixing portion 41 and the folded ring portion 42 will be excessively interfered by the front cover 20 during vibration, thereby affecting the vibration effect of the diaphragm 40.
  • the contact area of the fixing portion 41 and the adhesive surface 21 is reduced, resulting in a lack of fixing effect of the fixing portion 41 it is good.
  • setting the inner edge of the bonding surface 21 to be flush with the inner edge of the supporting surface 11 can avoid the above-mentioned problems, can ensure that the vibration performance of the diaphragm 40 is better, and can also avoid The diaphragm 40 deforms unevenly when vibrating, resulting in a reduced life of the diaphragm 40.
  • the inner peripheral wall of the front cover 20 includes a plurality of stepped surfaces.
  • the plurality of stepped surfaces are arranged along the opening direction of the middle opening of the front cover 20, and the stepped surfaces extend along the opening direction of the middle opening of the front cover 20.
  • Each stepped surface includes a first stepped surface 22 connected to the adhesive surface 21, and the first stepped surface 22 gradually extends outward in a direction close to the housing 10.
  • the inner peripheral wall of the front cover 20 since the inner peripheral wall of the front cover 20 is arranged in multiple steps, the inner peripheral wall of the front cover 20 has a plurality of stepped surfaces, and the plurality of stepped surfaces all extend toward the housing 10, wherein the first stepped surface 22 is connected to the adhesive surface 21, and the first stepped surface 22 is gradually inclined outward in a direction close to the housing 10, that is, the angle between the first stepped surface 22 and the adhesive surface 21 is an obtuse angle.
  • the front cover 20 when the diaphragm 40 is bonded to the front cover 20, the front cover 20 is placed so that the bonding surface 21 faces upward, and after adding an adhesive such as glue to the bonding surface 21, the fixing portion 41 is bonded to the The interface 21 is attached.
  • the first stepped surface 22 is gradually extended outward in the direction close to the housing 10, which can make the front cover 20
  • the thicker wall can increase the strength of the front cover 20, and can avoid the vibration range of the diaphragm 40 and increase the vibration space.
  • the fixing portion 41 and the front cover 20 may also be sol-bonded or shadow-free glue-bonded.
  • the front cover 20 and the diaphragm 40 are first bonded to form a first component, and then the first component is bonded and fixed to the voice coil of the vibration system and the housing 10, and then the metal plate 30 is bonded to the front cover 20 on.
  • the projection area of the middle opening of the front cover 20 on the diaphragm 40 is larger than the area of the central portion 43, which is convenient for assembly with other components.
  • the fixing portion 41 is directly bonded to the front cover 20, there is no need to bond the fixing portion to the steel ring as shown in FIG. 1, and then the steel ring is bonded to the front cover 20'.
  • the sound-emitting device of the utility model can omit the steel ring, which can greatly simplify the overall structure of the sound-emitting device and make the overall structure of the sound-emitting device more compact.
  • the front cover 20 is made of copper. Specifically, copper has better workability. When the front cover 20 is made of copper, it is easier to process the front cover 20. In addition, copper can be recycled many times without affecting its mechanical properties, which can greatly save resources .
  • the front cover 20 may also be made of aluminum, steel, or iron.
  • the metal plate 30 is a steel plate. It can be understood that the metal plate 30 has the function of protecting the vibration system, so the metal plate 30 is required to have good strength and rigidity. In addition, the structure of the sound generating device should be ensured to be compact, so the metal plate 30 should be as thin as possible.
  • the steel plate has higher strength and stiffness. Even when the steel plate is thinner, it has better strength and stiffness and is not easily deformed, which can better protect the vibration system.
  • the metal plate 30 may also be an aluminum alloy plate, a magnesium alloy plate, an iron plate, or the like.
  • the front cover 20 and the metal plate 30 are adhered by glue or double-sided adhesive.
  • the bonding strength can meet the requirements, the use is relatively convenient, and the cost is also low.
  • the utility model also proposes an electronic device, which includes a sound-generating device.
  • the specific structure of the sound-generating device refers to the above-mentioned embodiments. Since this electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the All the beneficial effects brought by the technical solution will not be repeated here.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

本实用新型公开一种发声装置和电子设备，其中，所述发声装置包括外壳、振动系统、前盖和金属板，所述外壳具有一敞口；所述振动系统设于所述外壳内；所述前盖盖设在所述外壳的敞口，所述前盖为金属件，且所述前盖为中间开口的环形结构，在靠近所述外壳的方向上，所述前盖的内周壁呈上升式的多级阶梯状设置；所述金属板，粘设于或激光焊接于所述前盖的背离所述外壳的表面，并盖合所述前盖的中间开口设置，所述金属板上且对应所述前盖的中间开口设有出声孔。本实用新型技术方案能降低发声装置的生产成本。

Description

发声装置和电子设备 技术领域
本实用新型涉及声能转换技术领域，特别涉及一种发声装置和电子设备。
背景技术
通常，在发声装置中，外壳的敞口端盖设有前盖和金属板，例如在一些示例中，如图1所示，金属板30＇设在前盖20＇上，并且金属板30＇是作为嵌件与前盖20＇一体注塑成型，由于金属板30＇在较薄时也具有较好的强度，故可以与前盖20＇一起对振动系统起到较好的保护作用。但是，由于金属板30＇是作为嵌件而与前盖20＇注塑成型的，在每次注塑成型时，都需要将金属板30＇装入模具中，操作复杂，导致成本大大增加。
实用新型内容
本实用新型的主要目的是提出一种发声装置，旨在降低生产成本。
为实现上述目的，本实用新型提出的发声装置，包括：
外壳，具有一敞口；
振动系统，设于所述外壳内；
前盖，盖设在所述外壳的敞口，所述前盖为金属件，且所述前盖为中间开口的环形结构，在靠近所述外壳的方向上，所述前盖的内周壁呈上升式的多级阶梯状设置；以及
金属板，粘设于或激光焊接于所述前盖的背离所述外壳的表面，并盖合所述前盖的中间开口设置，所述金属板上且对应所述前盖的中间开口设有出声孔。
可选地，所述振动系统包括振膜，所述振膜包括中心部、围绕所述中心部设置的折环部以及围绕所述折环部设置的固定部，所述固定部分别与所述前盖和所述外壳粘接。
可选地，所述前盖具有一朝向所述外壳的粘接面，所述粘接面与所述固 定部粘接，所述粘接面在所述固定部上的投影位于所述固定部内。
可选地，所述前盖的内周壁包括多个阶梯面，多个所述阶梯面沿所述前盖的中间开口的开口方向排布，且所述阶梯面沿所述前盖的中间开口的开口方向延伸，多个所述阶梯面包括一与所述粘接面连接的第一阶梯面，所述第一阶梯面在靠近所述外壳的方向上逐渐朝外延伸。
可选地，所述外壳具有一环绕所述外壳的敞口设置的支撑面，所述支撑面朝向所述粘接面，并与所述固定部粘接，所述支撑面的内侧缘与所述粘接面的内侧缘平齐。
可选地，所述前盖的中间开口在所述振膜上的投影面积大于所述中心部的面积。
可选地，所述前盖为铜制件。
可选地，所述金属板为钢板。
可选地，所述前盖和所述金属板通过胶水或者双面胶粘接。
本实用新型还提出一种电子设备，包括发声装置，所述发声装置包括：
外壳，具有一敞口；
振动系统，设于所述外壳内；
前盖，盖合所述外壳的敞口设置，所述前盖为金属件，且所述前盖为中间开口的环形结构，在靠近所述外壳的方向上，所述前盖的内周壁呈上升式的多级阶梯状设置；以及
金属板，粘设于所述前盖的背离所述外壳的表面，并盖合所述前盖的中间开口设置，所述金属板上且对应所述前盖的中间开口设有出声孔。
本实用新型技术方案通过将前盖和金属板分为两个独立的部件，并将金属板与前盖粘接或激光焊接，只需将前盖与金属板分别加工，然后再将金属板与前盖固定即可，相较于金属板与前盖一体注塑成型，本实用新型方案更加简单和方便。另外，由于不需要使用注塑模具来实现两者的连接，故能大大降低发声装置的生产成本。同时，在靠近外壳的方向上，前盖的内周壁呈上升式的多级阶梯状设置时，使得前盖的壁厚逐渐增大，能增加前盖的强度。另外，前盖的内周壁是逐渐朝外避开振膜的折环部和固定部的连接处的，如此使得振膜的振动空间更大，能保证振膜具有较好的振动效果。再者，还会 使得前盖的背离外壳的表面的面积更大，前盖与金属板的接触面积更多，能增强前盖与金属板的粘接效果，使得金属板粘接更稳定。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术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示出的结构获得其他的附图。
图1为一示例中发声装置的结构示意图；
图2为本实用新型发声装置一实施例的结构示意图；
图3为图2中A处的放大图。
附图标号说明：
标号 名称 标号 名称
10 外壳 31 出声孔
11 支撑面 40 振膜
20/20＇ 前盖 41 固定部
21 粘接面 42 折环部
22 第一阶梯面 43 中心部
30/30＇ 金属板    
本实用新型目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
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作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
需要说明，若本实用新型实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本实用新型实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B为例”，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
本实用新型提出一种发声装置，该发声装置用于电子设备，其中，该电子设备可以为手机、平板电脑或耳机等能够发声的设备。
在本实用新型实施例中，请参考图2和图3，该发声装置包括：
外壳10，具有一敞口；
振动系统，设于外壳10内；
前盖20，盖设在外壳10的敞口，前盖20为金属件，且前盖20为中间开口的环形结构，在靠近外壳10的方向上，前盖20的内周壁呈上升式的多级阶梯状设置；以及
金属板30，粘设于前盖20的背离外壳10的表面，并盖合前盖20的中间开口设置，金属板30上且对应前盖20的中间开口设有出声孔31。在其他的实施例中，金属板还可以激光焊接于前盖20的背离外壳10的表面。
本实施例中，金属板30与前盖20粘接时，出声孔31与前盖20的中间开口连通，振动系统振动产生的声音可通过出声孔31传播出去。其中，前盖20形状可以为多种，例如前盖20为圆环状、方环状或其它类型的环状结构等等。
本实施例中，在靠近外壳10的方向上，前盖20的内周壁呈上升式的多级阶梯状设置，具体而言，在靠近外壳10的方向上，前盖20的内径逐渐变 大，从而使得在靠近振膜40的位置的振动空间更大，以满足振膜40的振动空间的需求。另外，前盖20的内周壁可具有两级阶梯、三级阶梯或者更多级阶梯等。
通常在一些示例中，参考图1，金属板30＇与前盖20＇是通过注塑模具一体注塑成型的，金属板30＇作为嵌件先置于注塑模具中，如此使得模具的结构更为复杂，模具成本高，并且在注塑成型时，每次成型都需要将金属板30＇装入模具中，使得操作复杂，导致生产成本大大增加。而在本方案中，参考图2和图3，将前盖20和金属板30分为两个独立的部件，并将金属板30与前盖20粘接，只需将前盖20与金属板30分别加工，然后再将金属板30与前盖20粘接即可，相较于金属板30与前盖20一体注塑成型，粘接方式的连接更加简单和方便。另外，由于不需要使用注塑模具来实现两者的连接，故能大大降低发声装置的生产成本。同时，在靠近外壳10的方向上，前盖20的内周壁呈上升式的多级阶梯状设置时，使得前盖20的壁厚逐渐增大，能增加前盖20的强度。另外，前盖20的内周壁是逐渐朝外避开振膜40的折环部42和固定部41的连接处的，如此使得振膜40的振动空间更大，能保证振膜40具有较好的振动效果。再者，还会使得前盖20的背离外壳10的表面的面积更大，前盖20与金属板30的接触面积更多，能增强前盖20与金属板30的粘接效果，使得金属板30粘接更稳定。
本实施例中，振动系统包括振膜40，振膜40包括中心部43、围绕中心部43设置的折环部42以及围绕折环部42设置的固定部41，固定部41夹持于前盖20和外壳10之间，并且固定部41分别与前盖20和外壳10粘接。具体而言，固定部41是振膜40的外周部分，往振膜40的中心方向依次为相互连接的折环部42和中心部43。前盖20盖设在外壳10后，前盖20与外壳10之间会形成收容空间，并且折环部42和中心部43位于收容空间内。
本实施例中，前盖20具有一朝向外壳10的粘接面21，粘接面21与固定部41粘接，粘接面21在固定部41上的投影位于固定部41内。也就是说，粘接面21在固定部41上的投影面积小于固定部41的面积，如此，前盖20则只与固定部41接触，而不与折环部42和固定部41的连接处接触，前盖20不会对折环部42和固定部41的连接处造成遮挡，从而不会影响到折环部42的振动，使得振膜40具有较好的振动效果。
本实施例中，外壳10具有一环绕外壳10的敞口设置的支撑面11，支撑面11朝向粘接面21设置，并与固定部41粘接，粘接面21的内侧缘与支撑面11的内侧缘平齐。可以理解的是，固定部41被前盖20与外壳10夹持时，固定部41与折环部42的连接处处于悬空状态，如此能够避免前盖20对该连接处造成干涉而影响到振膜的振动。另外，假设粘接面21的内侧缘相对于支撑面11的内侧缘更靠近折环部42设置时，固定部41与粘接面21的接触面积大于固定部41与支撑面11的接触面积，如此，固定部41与折环部42的连接处在振动时会受到前盖20过多的干涉，从而影响振膜40的振动效果。而当粘接面21的内侧缘相对于支撑面11的内侧缘更远离折环部42设置时，会使得固定部41与粘接面21的接触面积减少，从而导致固定部41的固定效果不好。在本实用新型实施例中，将粘接面21的内侧缘设置为与支撑面11的内侧缘平齐，可以避免上述问题的产生，可以保证振膜40的振动性能更好，还能避免因振膜40振动时变形不均匀而导致振膜40的寿命减少。
本实施例中，前盖20的内周壁包括多个阶梯面，多个阶梯面沿前盖20的中间开口的开口方向排布，且阶梯面沿前盖20的中间开口的开口方向延伸，多个阶梯面包括一与粘接面21连接的第一阶梯面22，第一阶梯面22在靠近外壳10的方向上逐渐朝外延伸。具体而言，由于前盖20的内周壁呈多级阶梯状设置，故前盖20的内周壁具有多个阶梯面，并且多个阶梯面均朝靠近外壳10的方向延伸，其中第一阶梯面22与粘接面21连接，并将第一阶梯面22在靠近外壳10的方向上逐渐朝外倾斜设置，即第一阶梯面22与粘接面21之间的夹角为钝角。可以理解的是，振膜40与前盖20粘接时，将前盖20放置使得粘接面21朝上，在粘接面21上添加胶水等粘接剂后，再将固定部41与粘接面21贴合。当将固定部41粘接在粘接面21上时，为保证固定部41能较好的粘接在粘接面21上，会使用较多的胶水等粘接剂，将固定部41粘接在粘接面21上时，多余的胶水会溢出流到折环部42，而将第一阶梯面22逐渐朝外倾斜设置，可以使得多余的胶水沿着第一阶梯面22流到下一级阶梯面上，能避免多余的胶水流到折环部42，避免折环部42与前盖20粘接而使得振膜40的振动效果差。此外，在粘接面22的面积相同时，相较于第一阶梯面22呈直壁设置，将第一阶梯面22在靠近外壳10的方向上逐渐朝外延伸设置，可以使得前盖20的壁厚更厚，可以增加前盖20的强度，还能避开振膜 40的振动范围，增大振动空间。当然，在其它实施例中，固定部41与前盖20还可以溶胶粘接或无影胶粘接等等。
本实施例中，前盖20与振膜40先粘接构成第一组件，然后第一组件再与振动系统的音圈以及外壳10进行粘接固定，再然后将金属板30粘接在前盖20上。其中，前盖20的中间开口在振膜40上的投影面积大于中心部43的面积，便于与其他部件的装配。此外，由于直接将固定部41粘接在前盖20上，而不需要如图1所示的，先将固定部粘接在钢环上，再将钢环与前盖20＇粘接，本实用新型的发声装置能够省去钢环这一部件，故能大大简化发声装置的整体结构，使得发声装置的整体结构更为紧凑。
本实施例中，前盖20为铜制件。具体而言，铜具有较好可加工性，当前盖20为铜制件时，使得加工前盖20比较容易，此外，铜还可以多次回收利用而不会影响其机械性能，可以大大节约资源。当然，在其它实施例中，前盖20也可以为铝制件、钢制件或铁制件等等。
本实施例中，金属板30为钢板。可以理解的是，金属板30具有保护振动系统的作用，故要求金属板30具有较好的强度和刚度，此外，还应保证发声装置的结构紧凑，故金属板30的应该尽量薄。而钢板的强度、刚度较高，即使钢板在较薄时也具有较好的强度和刚度，并不易变形，可以更好的保护振动系统。当然，在其它实施例中，金属板30也可以为铝合金板、镁合金板或铁板等等。
本实施例中，前盖20和金属板30通过胶水或者双面胶粘接。具体而言，采用胶水或者双面胶将前盖20和金属板30粘接时，粘接强度能满足要求，使用比较方便，成本也较低。
本实用新型还提出一种电子设备，该电子设备包括发声装置，该发声装置的具体结构参照上述实施例，由于本电子设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
以上所述仅为本实用新型的优选实施例，并非因此限制本实用新型的专利范围，凡是在本实用新型的发明构思下，利用本实用新型说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本 实用新型的专利保护范围内。

Claims (10)

  1. 一种发声装置，其特征在于，包括：
    外壳，具有一敞口；
    振动系统，设于所述外壳内；
    前盖，盖设在所述外壳的敞口，所述前盖为金属件，且所述前盖为中间开口的环形结构，在靠近所述外壳的方向上，所述前盖的内周壁呈上升式的多级阶梯状设置；以及
    金属板，粘设于或激光焊接于所述前盖的背离所述外壳的表面，并盖合所述前盖的中间开口设置，所述金属板上且对应所述前盖的中间开口设有出声孔。
  2. 如权利要求1所述的发声装置，其特征在于，所述振动系统包括振膜，所述振膜包括中心部、围绕所述中心部设置的折环部以及围绕所述折环部设置的固定部，所述固定部分别与所述前盖和所述外壳粘接。
  3. 如权利要求2所述的发声装置，其特征在于，所述前盖具有一朝向所述外壳的粘接面，所述粘接面与所述固定部粘接，所述粘接面在所述固定部上的投影位于所述固定部内。
  4. 如权利要求3所述的发声装置，其特征在于，所述前盖的内周壁包括多个阶梯面，多个所述阶梯面沿所述前盖的中间开口的开口方向排布，且所述阶梯面沿所述前盖的中间开口的开口方向延伸，多个所述阶梯面包括一与所述粘接面连接的第一阶梯面，所述第一阶梯面在靠近所述外壳的方向上逐渐朝外延伸。
  5. 如权利要求3所述的发声装置，其特征在于，所述外壳具有一环绕所述外壳的敞口设置的支撑面，所述支撑面朝向所述粘接面，并与所述固定部粘接，所述支撑面的内侧缘与所述粘接面的内侧缘平齐。
  6. 如权利要求2所述的发声装置，其特征在于，所述前盖的中间开口在所述振膜上的投影面积大于所述中心部的面积。
  7. 如权利要求1至6中任意一项所述的发声装置，其特征在于，所述前盖为铜制件。
  8. 如权利要求1至6中任意一项所述的发声装置，其特征在于，所述金属板为钢板。
  9. 如权利要求1至6中任意一项所述的发声装置，其特征在于，所述前盖和所述金属板通过胶水或者双面胶粘接。
  10. 一种电子设备，其特征在于，包括如权利要求1至9中任意一项所述的发声装置。
PCT/CN2018/125605 2018-12-06 2018-12-29 发声装置和电子设备 Ceased WO2020113742A1 (zh)

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