WO2016184061A1 - 发声装置、电子设备及其制造方法 - Google Patents

发声装置、电子设备及其制造方法 Download PDF

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Publication number
WO2016184061A1
WO2016184061A1 PCT/CN2015/094952 CN2015094952W WO2016184061A1 WO 2016184061 A1 WO2016184061 A1 WO 2016184061A1 CN 2015094952 W CN2015094952 W CN 2015094952W WO 2016184061 A1 WO2016184061 A1 WO 2016184061A1
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WIPO (PCT)
Prior art keywords
front cover
piezoelectric buzzer
sounding device
sounder
sounding
Prior art date
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Ceased
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PCT/CN2015/094952
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English (en)
French (fr)
Inventor
单连文
杨鑫峰
王海荣
崔龙浩
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Goertek Inc
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Goertek Inc
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Publication date
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Priority to US15/573,693 priority Critical patent/US10553191B2/en
Publication of WO2016184061A1 publication Critical patent/WO2016184061A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
    • 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
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements 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
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • 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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts

Definitions

  • the present invention relates to the field of sound emitting devices, and more particularly to a sound emitting device, an electronic device, and a method of fabricating the same.
  • the sounding device is a device capable of converting an electrical signal into a sound signal.
  • the sounding device includes, for example, a receiver.
  • a dynamic speaker and a speaker can be referred to as a receiver.
  • Sounding devices are widely used in media devices.
  • the media device includes, for example, a mobile phone and its headphones.
  • High frequency performance is an important performance of sounding devices.
  • the frequency response curve of a typical moving coil receiver will drop rapidly in the range of 6 kHz to 9 kHz.
  • the frequency response curve of a typical speaker will also drop after a dozen kilohertz. That is to say, the frequency response curve of the sounding device will have a cutoff frequency at high frequencies.
  • people have higher and higher requirements for high frequency cutoff frequency of sounding devices.
  • due to the limitations of the material and process of the sounding device especially the material and process limitations of the moving coil receiver, its high frequency cutoff frequency is difficult to improve.
  • the high frequency cutoff frequency of the sounding device is required to be above 16 kHz.
  • ordinary moving coil receivers have been difficult to achieve this requirement.
  • a sounding device comprising a sounder, a piezoelectric buzzer and a front cover, wherein a front cover is attached to the front of the sounder, and the piezoelectric buzzer is attached On the front cover.
  • the sounding device is a moving coil type receiver
  • the sound generator is a moving coil sounding portion of the moving coil type receiver.
  • the resonant frequency of the piezoelectric buzzer is less than or equal to a high frequency cutoff frequency of the sounder.
  • the piezoelectric buzzer is annular
  • the front cover is annular
  • the Helmholtz resonator is formed by the sounder and the front cover.
  • the annular opening of the front cover is sized such that the resonant frequency of the Helmholtz resonator is the same as the resonant frequency of the piezoelectric buzzer.
  • the piezoelectric buzzer is snugly attached to the front cover.
  • the piezoelectric buzzer is located inside the front cover.
  • an electronic device comprising a sounding device according to the invention.
  • a method for manufacturing a sounding device wherein the sounding device comprises a sounder, a piezoelectric buzzer and a front cover, and the sounder and the front cover form Helmho Resonator, the method comprising: attaching a piezoelectric buzzer to the front cover, wherein the piezoelectric buzzer is annular and the front cover is annular; according to the resonant frequency of the piezoelectric buzzer The resonant frequency of the Helmholtz resonator is determined to determine the size of the annular opening of the front cover; and the front cover is attached to the front of the sounder.
  • the inventors of the present invention have found that in the prior art, the high frequency characteristics of the sounder are not compensated by the piezoelectric buzzer, and it is not recognized that it can be enhanced by the interaction of the piezoelectric buzzer and the front cover. Compensation effect. Therefore, the technical task to be achieved by the present invention or the technical problem to be solved is not thought of or expected by those skilled in the art, so the present invention is a new technical solution.
  • FIG. 1 is a perspective exploded view of the sounding device as viewed from below, in accordance with an embodiment of the present invention.
  • FIG. 2 is a perspective exploded view of the sounding device as viewed from above, in accordance with an embodiment of the present invention.
  • Figure 3 is a top plan view of a sounding device in accordance with one embodiment of the present invention.
  • FIG. 4 is an exploded perspective view of the sounding device as viewed from the side, in accordance with an embodiment of the present invention.
  • Figure 5 is a side elevational view of a sounding device in accordance with one embodiment of the present invention.
  • Fig. 6 is a schematic view showing the connection between the Pogo Pin type connector of the sound emitting device and the piezoelectric buzzer (the sounder is omitted) according to an embodiment of the present invention.
  • Fig. 7 is another schematic view (the sounder is omitted) of the connection between the Pogo Pin type connector of the sounding device and the piezoelectric buzzer according to an embodiment of the present invention.
  • Figure 8 is a view of the sounding device as viewed from the front cover side, in accordance with one embodiment of the present invention.
  • Figure 9 is a cross-sectional view of the sounding device of Figure 8 taken along line A-A'.
  • Figure 10 is a cross-sectional view of the sounding device of Figure 8 taken along line B-B'.
  • FIG. 11 is a flow chart of a method for fabricating a sounding device in accordance with another embodiment of the present invention.
  • Figure 12 shows a model of a Helmholtz resonator.
  • FIG. 1 is a perspective exploded view of the sounding device 100 as viewed from below, in accordance with an embodiment of the present invention.
  • the sounding device 100 includes a sounder 210, a piezoelectric buzzer 220, and a front cover 230.
  • the front cover 230 may be attached to the front of the sound generator 210.
  • the piezoelectric buzzer 220 is attached to the front cover 230.
  • the sounding device 100 is a moving coil type receiver.
  • the sound generator 210 is a moving coil sounding portion of a moving coil type receiver.
  • the piezoelectric buzzer 220 is a sounding body that uses piezoelectric ceramics as an electroacoustic transducer.
  • This device is a transducing replacement piece formed by sticking a piezoelectric ceramic sheet on a metal piece, that is, a piezoelectric buzzer.
  • the piezoelectric buzzer does not generate RF noise during operation and has low power consumption.
  • the resonant frequency of the piezoelectric buzzer can be between 1 kHz and 40 kHz. It is small in size and easy to install.
  • the piezoelectric buzzer has a very high volume after the resonant frequency and the resonant frequency.
  • Add a piezoelectric buzzer to the sounding device The appropriate resonant frequency of the piezoelectric buzzer is selected and the piezoelectric buzzer and the sounder in the sounding device are operated simultaneously, which compensates for the high frequency response characteristics of the sounding device.
  • the superimposed frequency response of the compensated sounding device can be well performed at 20 kHz or even 40 kHz, effectively increasing the high frequency cutoff frequency of the sounding device and improving the high frequency performance of the sounding device.
  • a front cover is provided in the sounding device.
  • the front cover can be used to protect hair Sound device.
  • the piezoelectric buzzer is attached to the front cover. Due to the interaction of the piezoelectric buzzer and the front cover, the effect of frequency compensation can be further improved.
  • the piezoelectric buzzer may be placed against the front cover. As long as the piezoelectric buzzer and the front cover can interact with each other during operation.
  • the piezoelectric buzzer is located inside the front cover to protect the piezoelectric buzzer by the front cover.
  • the material of the front cover is plastic or other insulating material.
  • the front cover can be insulated from the piezoelectric buzzer.
  • the sounding device 100 further includes a first input line and a second input line.
  • the first input line is for providing a first input signal to the sound generator.
  • the second input line is for providing the piezoelectric buzzer with a second input signal that is different from the first input signal.
  • the input voltages of the sounder and the piezoelectric buzzer are different.
  • the second input line can include a Pogo Pin type connector 110.
  • a piezoelectric buzzer can be annular. It will be understood by those skilled in the art that the ring refers to the shape of the closed, intermediate opening. For example, the ring shape includes a circular ring shape, a square ring shape, and the like. In addition, the piezoelectric buzzer can also be part of a ring.
  • the front cover can also be annular.
  • the sounder 210 and the front cover 230 (and the piezoelectric buzzer 220 attached to the front cover) can form a Helmholtz resonator.
  • the annular opening of the front cover may be sized such that the resonant frequency of the Helmholtz resonator is the same as the resonant frequency of the piezoelectric buzzer, thereby enabling the piezoelectric buzzer to obtain a higher frequency near the resonant frequency. Sound pressure level.
  • the resonant frequency of the Helmholtz resonator can be made greater than 10 kHz by setting the annular opening size of the front cover; preferably, greater than 16 kHz; more preferably greater than 20 kHz.
  • adjusting the size of the front cover is a convenient way to adjust the Helmholtz resonator formed by the front cover and the sounder.
  • the way the resonant frequency is. How to determine the resonant frequency of the Helmholtz resonator is known to those skilled in the art. Below, only for the example of the calculation of the circular front cover Formula for resonant frequency:
  • f 0 is the resonant frequency of the Helmholtz resonator
  • S is the sound hole area of the front cover
  • d is the sound hole diameter
  • l is the sound hole length
  • V is the air volume
  • C is the sound speed.
  • the model of the Helmholtz resonator is shown in Figure 12. Models and calculation formulas for Helmholtz resonators are known in the art and are not of interest to the present invention, so they are not described in further detail herein.
  • FIG. 2 is a perspective exploded view of the sounding device as viewed from above, in accordance with an embodiment of the present invention.
  • the sounding device 100 includes a sounder 210, a piezoelectric buzzer 220, and a front cover 230.
  • a Pogo Pin type connector 110 in the second input line is also shown in Figure 2 .
  • Two Pogo Pin connectors can be molded in the sounder.
  • a flexible circuit board can be used for the connection.
  • the front cover also has a second pad 310.
  • the piezoelectric buzzer has a wire 320 for connection to a second pad.
  • a POGO PIN type connector is coupled to the second pad to deliver a second input signal.
  • a POGO PIN type connector is injection molded.
  • a through hole may be formed in the sounder at a position corresponding to the POGO PIN type connector so that the POGO PIN type connector is connected to the second pad through the through hole.
  • Figure 3 is a top plan view of a sounding device in accordance with one embodiment of the present invention.
  • Fig. 3 shows a view of the sounding device 100 as viewed from the sounder side.
  • the sounding device 100 includes a POGO PIN connector 110 and a first pad 120.
  • the first pad 120 is part of a first input line that is used to pass a first input signal. Through the first pad, an input signal can be provided to the sounder 210 such that the sounder 210 sounds.
  • Fig. 4 shows an exploded perspective view of the sounding device according to an embodiment of the present invention.
  • the sounding device includes a POGO PIN connector 110, a sounder 210, a piezoelectric buzzer 220, and a front cover 230.
  • a lead is placed on the piezoelectric buzzer 220 for It is connected to the pad on the front cover 230 and receives an input signal through the POGO PIN.
  • FIG. 5 is a side elevational view of a sounding device in accordance with one embodiment of the present invention.
  • the POGO PIN connector 110, the sound generator 210, and the front cover 230 of the sounding device 100 are shown in FIG.
  • the piezoelectric buzzer is attached to the inside of the front cover 230, and thus is not shown in FIG.
  • FIG. 6 is a view showing a connection between a Pogo Pin type connector of a sound emitting device and a piezoelectric buzzer according to an embodiment of the present invention.
  • the sounder is omitted in FIG. Fig. 6 shows a view from obliquely above.
  • a second pad 310 is provided on the front cover 230.
  • the second pad 310 can be injection molded.
  • the POGO PIN type connector 110 is connected to the second pad 310.
  • the POGO PIN type connector 110 can also be injection molded.
  • Piezoelectric buzzer 220 is connected to second pad 310 by lead 320.
  • FIG. 7 is another schematic view showing the connection between the Pogo Pin type connector of the sound emitting device and the piezoelectric buzzer according to an embodiment of the present invention.
  • the sounder is omitted in FIG. Fig. 7 shows a view from directly above.
  • a second pad 310 is provided on the front cover 230.
  • the second pad 310 can be injection molded.
  • the POGO PIN type connector 110 is connected to the second pad 310.
  • the POGO PIN type connector 110 can also be injection molded.
  • Piezoelectric buzzer 220 is connected to second pad 310 by lead 320.
  • Figure 8 is a view of the sounding device as viewed from the front cover side, in accordance with one embodiment of the present invention.
  • Figure 9 is a cross-sectional view of the sounding device of Figure 8 taken along line A-A'.
  • the sounding device 100 includes a sounder 210, a piezoelectric buzzer 220, and a front cover 230. Since the sounder 210 itself is not of interest to the present invention, it will not be described in detail herein.
  • the piezoelectric buzzer 220 is attached to the inner side of the front cover 230. Alternatively, the piezoelectric buzzer 220 may also be attached to the outside of the front cover 230.
  • Figure 10 is a cross-sectional view of the sounding device of Figure 8 taken along line B-B'.
  • the sounder 210 and the front cover 230 are shown in FIG.
  • the POGO PIN type connector 110 is passed through the sounder 210 in contact with a pad (not shown) on the front cover 230.
  • the invention also includes an electronic device.
  • the electronic device comprises, for example, a sounding device according to the invention.
  • the electronic device is for example a media device.
  • the electronic device is a mobile phone.
  • the sounding device is, for example, a speaker, a headphone, or the like in a mobile phone.
  • the sounding device includes a sounder, a piezoelectric buzzer, and a front cover, and the sounder and the front cover form a Helmholtz resonator.
  • the piezoelectric buzzer is attached to the front cover.
  • a piezoelectric buzzer is annular and the front cover is also annular.
  • the annular opening of the piezoelectric buzzer and the annular opening of the front cover at least partially overlap.
  • the annular opening size of the front cover is adjusted to adjust the resonant frequency of the Helmholtz resonator.
  • the annular opening of the front cover may refer to the size of the opening when viewed from the front cover side toward the sounder.
  • the size of the annular opening of the front cover may be the size of the opening formed by the piezoelectric buzzer and the front cover.
  • the annular opening size of the piezoelectric buzzer can also be adjusted at the same time.
  • the size of the annular opening of the front cover can be adjusted by adjusting the relative positions of the front cover and the piezoelectric buzzer.
  • the front cover is attached to the front of the sounder.
  • steps S1100, S1200, and S1300 are illustrated in FIG. 11, this merely indicates that the method according to the present invention may include the steps, and does not indicate that the above steps must be performed in the stated order.
  • step S1200 may be performed before step S1100; or step S1200 may be performed after step S1300.
  • step S1100 may be performed after step S1300.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

本发明公开了一种发声装置、电子设备及其制造方法。该发声装置包括发声器、压电式蜂鸣器和前盖，其中，前盖被附着在发声器的前方，压电式蜂鸣器被附着在前盖上。

Description

发声装置、电子设备及其制造方法 技术领域
本发明涉及发声装置技术领域，更具体地，涉及一种发声装置、电子设备及其制造方法。
背景技术
发声装置是能够将电信号转换成声音信号装置。发声装置例如包括受话器。例如，动圈式受话器和扬声器都可以称为受话器。发声装置广泛地应用于媒体设备中。例如，媒体设备例如包括手机及其耳机等。
高频性能是发声装置的一个重要的性能。一般的动圈式受话器的频率响应曲线在6kHz至9kHz的区间会出现快速下降。一般扬声器的频率响应曲线在十几千赫兹之后也会下降。也就是说，发声装置的频率响应曲线在高频会出现截止频率。随着技术的发展，人们对于发声装置高频截止频率要求越来越高。然而，由于发声装置的材料和工艺的限制，尤其是动圈式受话器的材料和工艺的限制，它的高频截止频率很难得到提升。
随着4G通讯的广泛应用，要求具有超宽频带的发声装置。例如，在一些情况下，需要发声装置的高频截止频率能达到16kHz以上。然而，例如，普通的动圈式受话器已经很难达到这个要求。
发明内容
本发明的一个目的是提供一种新的发声装置。
根据本发明的一个实施例，提供了一种发声装置，包括发声器、压电式蜂鸣器和前盖，其中，前盖被附着在发声器的前方，压电式蜂鸣器被附着在前盖上。
优选地，所述发声装置是动圈式受话器，以及所述发声器是动圈式受话器的动圈发声部分。
优选地，所述压电式蜂鸣器的谐振频率小于等于所述发声器的高频截止频率。
优选地，压电式蜂鸣器是环形的，前盖是环形的，以及由发声器和前盖形成亥姆霍兹共鸣器。
优选地，所述前盖的环形开口大小被设置成使得所述亥姆霍兹共鸣器的谐振频率与压电式蜂鸣器的谐振频率相同。
优选地，在压电式蜂鸣器和前盖之间存在缝隙。
优选地，压电式蜂鸣器被紧贴在前盖上。
优选地，压电式蜂鸣器位于前盖的内侧。
根据本发明的另一个实施例，提供了一种电子设备，包括根据本发明的发声装置。
根据本发明的另一个实施例，提供了一种用于制造发声装置的方法，其中，该发声装置包括发声器、压电式蜂鸣器和前盖，以及发声器和前盖形成亥姆霍兹共鸣器，所述方法包括：将压电式蜂鸣器附着在前盖上，其中，压电式蜂鸣器是环形的，前盖是环形的；根据压电式蜂鸣器的共振频率决定亥姆霍兹共鸣器的谐振频率，从而确定前盖的环形开口大小，；以及将前盖被附着在发声器的前方。
本发明的发明人发现，在现有技术中，没有通过压电式蜂鸣器来补偿发声器的高频特性，并且没有认识到可以通过压电式蜂鸣器和前盖的相互作用来增强补偿效果。因此，本发明所要实现的技术任务或者所要解决的技术问题是本领域技术人员从未想到的或者没有预期到的，故本发明是一种新的技术方案。
另外，本领域技术人员应当理解，尽管现有技术中存在许多问题，但是，本发明的每个实施例或权利要求的技术方案可以仅在一个或几个方面进行改进，而不必同时解决现有技术中或者背景技术中列出的全部技术问题。本领域技术人员应当理解，对于一个权利要求中没有提到的内容不应当作为对于该权利要求的限制。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是根据本发明的一个实施例的发声装置的从侧下方观察的立体分解视图。
图2是根据本发明的一个实施例的发声装置的从侧上方观察的立体分解视图。
图3是根据本发明的一个实施例的发声装置的顶视图。
图4是根据本发明的一个实施例的发声装置的从侧面观察的分解视图。
图5是根据本发明的一个实施例的发声装置的侧视图。
图6是根据本发明的一个实施例的发声装置的Pogo Pin型连接器与压电式蜂鸣器之间连接的示意图(省略了发声器)。
图7是根据本发明的一个实施例的发声装置的Pogo Pin型连接器与压电式蜂鸣器之间连接的另一个示意图(省略了发声器)。
图8是根据本发明的一个实施例的发声装置的从前盖侧观察的视图。
图9是图8中的发声装置沿A-A’线的截面图。
图10是图8中的发声装置沿B-B’线的截面图。
图11是根据本发明的另一个实施例的用于制造发声装置的方法的流程图。
图12示出了亥姆霍兹共鸣器的模型。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
下面参照附图说明书根据本发明的实施例和例子。
图1示出了根据本发明的一个实施例的发声装置100的从侧下方观察的立体分解视图。
如图1所示，发声装置100包括发声器210、压电式蜂鸣器220和前盖230。
前盖230可以被附着在发声器210的前方。压电式蜂鸣器220被附着在前盖230上。
例如，所述发声装置100是动圈式受话器。在这种情况下，所述发声器210是动圈式受话器的动圈发声部分。
本领域技术人员应当了解，压电蜂鸣器220是一种以压电陶瓷作为电声换能器的发声体。这种器件是将压电陶瓷薄片粘贴在金属片上形成的换能换件，即压电蜂鸣片。压电蜂鸣器在工作时不产生射频噪声，并且具有低功耗等特点。
压电蜂鸣器的谐振频率可以位于1kHz至40kHz之间。它的体积小，便于安装。压电蜂鸣器在谐振频率及谐振频率之后音量非常大。在发声装置中增加一个压电蜂鸣器。选择压电蜂鸣器的适当谐振频率，并且使得压电蜂鸣器和发声装置中的发声器同时工作，这可以对发声装置的高频响应特性进行补偿。补偿后的发声装置的叠加频率响应可以在20kHz，甚至达到40kHz时都有很好的表现，有效增大发声装置的高频截止频率，提高发声装置的高频性能。
在本发明中，在发声装置中设置前盖。一方面，前盖可以用于保护发 声装置。另一方面，在本发明中，将压电式蜂鸣器与前盖附着在一起。由于压电式蜂鸣器和前盖的相互作用，可以进一步提高频率补偿的效果。
例如，可以在压电式蜂鸣器和前盖之间存在缝隙，或者，可以使压电式蜂鸣器紧贴在前盖上。只要在工作时压电式蜂鸣器和前盖能够产生相互作用就可以了。
在一个例子中，压电式蜂鸣器位于前盖的内侧，以便由前盖保护压电蜂鸣器。
优选地，前盖的材料是塑料或其他绝缘材料。前盖可以与压电蜂鸣器绝缘。
在一个例子中，发声装置100还包括第一输入线路和第二输入线路。第一输入线路用于向发声器提供第一输入信号。第二输入线路用于向压电式蜂鸣器提供不同于第一输入信号的第二输入信号。例如，发声器和压电蜂鸣器的输入电压是不同的。通过分别设置第一输入线路和第二输入线路，使得发声器和压电蜂鸣器能够同时工作在最佳状态。
例如，第二输入线路可以包括Pogo Pin型连接器110。
例如，压电式蜂鸣器可以是环形的。本领域技术人员应当理解，环形指的是四周封闭、中间开口的形状。例如，环形包括圆环形、方环形等。另外，压电式蜂鸣器也可以是环形的一部分。
例如，前盖也可以是环形的。在这种情况下由发声器210和前盖230(及附着在前盖上的压电蜂鸣器220)可以形成亥姆霍兹共鸣器。可以设置所述前盖的环形开口大小，使得所述亥姆霍兹共鸣器的谐振频率与压电式蜂鸣器的谐振频率相同，从而使压电蜂鸣器在谐振频率附近获得更高的声压级。
例如，可以通过设置前盖的环形开口大小，使得所述亥姆霍兹共鸣器的谐振频率大于10kHz；优选地，大于16kHz；更优选地，大于20kHz。
由于在发声装置设计完成之后，前盖和发声器之间的空间就基本固定了，因此，调整前盖的大小是一种比较方便的调整前盖和发声器所形成的亥姆霍兹共鸣器的谐振频率的方式。如何确定亥姆霍兹共鸣器的谐振频率是本领域技术人员已知的。下面，仅作为示例说明了对于圆环形前盖计算 谐振频率的公式：
Figure PCTCN2015094952-appb-000001
   (公式1)
其中，f0是亥姆霍兹共鸣器的谐振频率，S是前盖的出声孔面积，d为出声孔直径，l为出声孔长度，V为空气体积，C为声速。亥姆霍兹共鸣器的模型如图12所示。亥姆霍兹共鸣器的模型及计算公式是本领域已知的，并且其本身不是本发明所关注的，故不在这里对它们进行进一步详细描述。
图2是根据本发明的一个实施例的发声装置的从侧上方观察的立体分解视图。
如图2所示，发声装置100包括发声器210、压电式蜂鸣器220和前盖230。
图2中还示出第二输入线路中的Pogo Pin型连接器110。
可以在发声器内注塑形成两个Pogo Pin连接器。或者，也可以使用其他连接方式。例如,可以使用弹簧或者弹片等进行连接。或者，可以使用柔性电路板进行连接。
如图2所示，前盖上还具有第二焊盘310。压电式蜂鸣器具有用于连接到第二焊盘的连线320。POGO PIN型连接器与第二焊盘连接，以传递第二输入信号。例如，POGO PIN型连接器是注塑形成的。例如，可以在发声器上与POGO PIN型连接器对应的位置形成通孔，以便POGO PIN型连接器穿过所述通孔连接到第二焊盘。
图3是根据本发明的一个实施例的发声装置的顶视图。
图3示出了从发声器侧观察的发声装置100的视图。如图3所示，发声装置100包括POGO PIN连接器110以及第一焊盘120。例如，第一焊盘120属于第一输入线路的一部分，它用于传递第一输入信号。通过第一焊盘，可以向发声器210提供输入信号，使得发声器210发声。
图4示出了根据本发明的一个实施例的发声装置的从侧面观察的分解视图。
如图4所示，发声装置包括POGO PIN连接器110、发声器210、压电式蜂鸣器220和前盖230。例如，在压电式蜂鸣器220上设置引线，用于 连接到前盖230上的焊盘，并通过POGO PIN接收输入信号。
图5是根据本发明的一个实施例的发声装置的侧视图。图5中示出了发声装置100的POGO PIN连接器110、发声器210和前盖230。压电式蜂鸣器被附着在前盖230内侧，故在图5中未示出。
图6示出了根据本发明的一个实施例的发声装置的Pogo Pin型连接器与压电式蜂鸣器之间的连接的示意图。为了方便说明，在图6省略了发声器。图6示出了从斜上方观察的视图。如图6所示，在前盖230上设置第二焊盘310。第二焊盘310可以是注塑成型的。POGO PIN型连接器110连接到第二焊盘310。POGO PIN型连接器110也可以是注塑成型的。压电式蜂鸣器220通过引线320连接到第二焊盘310。
图7是根据本发明的一个实施例的发声装置的Pogo Pin型连接器与压电式蜂鸣器之间连接的另一个示意图。为了方便说明，在图7省略了发声器。图7示出了从正上方观察的视图。如图7所示，在前盖230上设置第二焊盘310。第二焊盘310可以是注塑成型的。POGO PIN型连接器110连接到第二焊盘310。POGO PIN型连接器110也可以是注塑成型的。压电式蜂鸣器220通过引线320连接到第二焊盘310。
图8是根据本发明的一个实施例的发声装置的从前盖侧观察的视图。
图9是图8中的发声装置沿A-A’线的截面图。如图9所示，发声装置100包括发声器210、压电式蜂鸣器220和前盖230。由于发声器210本身不是本发明所关注的内容，因此，在这里不对它进行详细描述。在图9的例子中，压电式蜂鸣器220被附着在前盖230的内侧。可选地，压电式蜂鸣器220也可以被附着在前盖230的外侧。
图10是图8中的发声装置沿B-B’线的截面图。图10中示出了发声器210和前盖230。POGO PIN型连接器110穿过发声器210与前盖230上的焊盘(未示出)接触。
在另一个实施例中，本发明还包括一种电子设备。该电子设备例如包括根据本发明的发声装置。该电子设备例如是媒体设备。例如，该电子设备是手机。例如，所述发声装置例如是手机中的扬声器、耳机等。
图11是根据本发明的另一个实施例的用于制造发声装置的方法的流 程图。例如，该发声装置包括发声器、压电式蜂鸣器和前盖，以及发声器和前盖形成亥姆霍兹共鸣器。
如图11所示，在步骤S1100，将压电式蜂鸣器附着在前盖上。例如，压电式蜂鸣器是环形的，前盖也是环形的。例如，压电式蜂鸣器的环形开口和前盖的环形开口至少部分重叠。
在步骤S1200，调整前盖的环形开口大小，以调整亥姆霍兹共鸣器的谐振频率。在这里，前盖的环形开口可以指的是从前盖侧向发声器观察时的开口大小。例如，前盖的环形开口大小可以是压电式蜂鸣器和前盖共同形成的开口的大小。可选地，如果压电式蜂鸣器的环形开口小于前盖的环形开口，也可以同时调整压电式蜂鸣器的环形开口大小。可选地，可以通过调整前盖和压电式蜂鸣器的相对位置来调整前盖的环形开口大小。
在步骤S1300，将前盖被附着在发声器的前方。
尽管在图11中示出了步骤S1100、S1200和S1300，但是，这仅表示根据本发明的方法可以包括所述步骤，而不表示上述步骤必须按照所述顺序执行。例如，可以在步骤S1100之前执行步骤S1200；或者，可以在步骤S1300之后执行步骤S1200。另外，例如，在将压电式蜂鸣器附着在前盖外侧的情况下，也可以在步骤S1300之后执行步骤S1100。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种发声装置，包括发声器、压电式蜂鸣器和前盖，其中，前盖被附着在发声器的前方，压电式蜂鸣器被附着在前盖上。
  2. 根据权利要求1所述的发声装置，其中，所述发声装置是动圈式受话器，以及所述发声器是动圈式受话器的动圈发声部分。
  3. 根据权利要求1所述的发声装置，其中，所述压电式蜂鸣器的谐振频率小于等于所述发声器的高频截止频率。
  4. 根据权利要求3所述的发声装置，其中，压电式蜂鸣器是环形的，前盖是环形的，以及由发声器和前盖形成亥姆霍兹共鸣器。
  5. 根据权利要求4所述的发声装置，其中，所述前盖的环形开口大小被设置成使得所述亥姆霍兹共鸣器的谐振频率与压电式蜂鸣器的谐振频率相同。
  6. 根据权利要求1-5中任何一项所述的发声装置，其中，在压电式蜂鸣器和前盖之间存在缝隙。
  7. 根据权利要求1-5中任何一项所述的发声装置，其中，压电式蜂鸣器被紧贴在前盖上。
  8. 根据权利要求1-5中任何一项所述的发声装置，其中，压电式蜂鸣器位于前盖的内侧。
  9. 一种电子设备，包括根据权利要求1所述的发声装置。
  10. 一种用于制造发声装置的方法，其中，该发声装置包括发声器、压电式蜂鸣器和前盖，以及发声器和前盖形成亥姆霍兹共鸣器，所述方法包括：
    将压电式蜂鸣器附着在前盖上，其中，压电式蜂鸣器是环形的，前盖是环形的；
    根据压电式蜂鸣器的共振频率决定亥姆霍兹共鸣器的谐振频率，从而确定前盖的环形开口大小；以及
    将前盖被附着在发声器的前方。
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