WO2021237814A1 - 发声器件 - Google Patents

发声器件 Download PDF

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Publication number
WO2021237814A1
WO2021237814A1 PCT/CN2020/095879 CN2020095879W WO2021237814A1 WO 2021237814 A1 WO2021237814 A1 WO 2021237814A1 CN 2020095879 W CN2020095879 W CN 2020095879W WO 2021237814 A1 WO2021237814 A1 WO 2021237814A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
rear shell
yoke
yoke body
cavity
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/CN2020/095879
Other languages
English (en)
French (fr)
Inventor
曹成铭
吴树文
吴立峰
沈凯华
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 WO2021237814A1 publication Critical patent/WO2021237814A1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the utility model relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to portable mobile electronic products.
  • Sounding devices also known as speakers, are widely used in portable mobile electronic products, such as mobile phones, to convert audio signals into sound for playback.
  • the sounding devices have high loudness and amplitude.
  • the related art sounding device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap.
  • the magnetic circuit system drives the vibration system to vibrate and produce sound
  • the vibration system includes The diaphragm of the basin frame and a voice coil fixed to the diaphragm and inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound.
  • the related art sound device does not have a rear cavity structure or the rear cavity is an open structure, when used in portable mobile electronic products such as mobile phones, it will cause the problem of mobile phone shell vibration, resulting in poor user experience; and mobile phone space Due to the limited size, the sound emitting device cannot be designed into a speaker box structure with a back cavity in the prior art to overcome this problem.
  • the purpose of the utility model is to provide a sound device with simple structure, good acoustic performance and good user experience.
  • the present invention provides a sound-producing device, which includes a sound-producing monomer, the sound-producing monomer includes a basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame and jointly enclosing an inner cavity ,
  • the vibration system includes a diaphragm fixed to the frame
  • the magnetic circuit system includes a yoke spaced opposite to the diaphragm
  • the yoke includes a yoke body spaced opposite to the diaphragm
  • the sound generating device further includes a rear shell fixed on the side of the yoke body away from the diaphragm, the rear shell and the yoke
  • the main body jointly enclose
  • the sound emitting device further includes a damping member attached to the yoke body and completely covering the leakage portion.
  • the sealing wall and the rear shell are made of metal materials.
  • the sealing wall or the rear shell is at least partially grounded.
  • the sound emitting device further includes a conductive member, one end of the conductive member is electrically connected to at least one of the sealing wall and the rear case, and the other end of the conductive member is used for grounding.
  • the conductive member is formed by extending at least one of the sealing wall and the rear case.
  • the sound emitting device further includes a conductive member, the conductive member includes two electrical pathways, one of the electrical pathways is used to connect the sounding monomer with an external electrical signal, and the other of the electrical pathways
  • the road is used to ground at least one of the sealing wall and the rear shell.
  • the sound emitting device further includes at least two positioning pieces, the two positioning pieces are connected to opposite sides or two diagonal corners of the sealing wall or the rear shell, and the positioning pieces are provided with penetrating through them.
  • the positioning piece is formed by extending the sealing wall or the rear shell outward.
  • the sound-producing unit further includes a front cover arranged on the side of the basin frame close to the diaphragm and enclosing a front acoustic cavity with the diaphragm, and the front cover is provided with a front cover along the vibration system The vibration direction penetrates through the through hole thereon, and the through hole connects the front acoustic cavity with the outside.
  • the sound generating device further includes a breathable damping member attached to the front cover, and the breathable damping member completely covers the through hole.
  • the part of the diaphragm fixed to the basin frame is provided with a ring-shaped sealing boss protruding toward the front cover, and the front cover is pressed on the sealing boss to form a seal.
  • the sound-emitting device further includes a sound-guiding shell covering a side of the sound-emitting monomer away from the rear shell, the sound-guiding shell having a sound-guiding cavity forming a side sound-emitting structure, and the sound-guiding cavity and the The diaphragm is connected.
  • the rear shell includes a rear shell plate spaced and opposed to the yoke body, and a rear shell plate that is bent and extended in the direction of the yoke body from the peripheral side of the rear shell plate and fixed to the yoke body in abutment.
  • the extension wall of the rear shell; the sounding device further includes a gas-permeable spacer located in the rear cavity, the gas-permeable spacer includes a spacer body arranged opposite to the rear shell plate, and a peripheral edge of the spacer body
  • the spacer extension part bent and extended toward the rear shell plate and the spacer fixing part bent and extended from the end of the spacer extension part away from the spacer body; the spacer extension part and the rear
  • the shell extension walls are arranged at intervals, and the spacer fixing part is fixed to the rear shell plate; the air-permeable spacer and the rear shell plate jointly enclose a powder filling space.
  • a side of the spacer body close to the yoke body is recessed in a direction away from the yoke body to form an escape step, and the escape step is arranged directly opposite to the leakage portion.
  • the yoke includes a yoke body spaced apart from the vibration system, a leakage part penetrating the yoke body, and a peripheral edge of the yoke body.
  • a ring-shaped sealing wall that is bent and extended along the basin frame in the direction close to the vibration system, and the sealing wall is attached and fixed to the outer peripheral side of the basin frame and seals the inner cavity through the yoke itself
  • the structure of the sealed inner cavity is not only simple in structure, and small in overall size increase along the direction of vibration, but also suitable for terminals with small installation space; at the same time, a rear shell is provided on the side of the yoke body away from the vibration system, The back shell and the yoke body jointly enclose a closed back cavity, the leaking part communicates the inner cavity with the back cavity, and the closed back cavity structure makes the sound device suitable for use in a mobile terminal Vibration absorption avoids the occurrence of shell vibration and makes the user experience better.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention.
  • Figure 2 is an exploded schematic diagram of a part of the three-dimensional structure of the sound generating device of the present invention
  • Figure 3 is a sectional view taken along the line A-A in Figure 1;
  • Figure 4 is a cross-sectional view taken along line B-B in Figure 1;
  • FIG. 5 is a schematic diagram of the structure of adding conductive elements in FIG. 3;
  • Fig. 6 is a schematic structural diagram of another derivative embodiment of Fig. 5;
  • FIG. 7 is a schematic structural diagram of another embodiment in which a conductive member is added in FIG. 5;
  • FIG. 7 is a schematic structural diagram of another embodiment in which a conductive member is added in FIG. 5;
  • Figure 8 is a cross-sectional view taken along line C-C in Figure 7;
  • FIG. 9 is a schematic structural view of the embodiment in FIG. 3 in which a sound guide shell is added to form a side sound emitting structure;
  • Fig. 10 is a schematic diagram of an embodiment of adding a breathable spacer in Fig. 4;
  • FIG. 11 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 10;
  • Fig. 12 is a schematic structural view of the diaphragm of the sound emitting device shown in Fig. 1 provided with a sealing boss;
  • FIG. 13 is a schematic structural diagram of an embodiment in which a positioning piece is added to the sound generating device shown in FIG. 1;
  • FIG. 13 is a schematic structural diagram of an embodiment in which a positioning piece is added to the sound generating device shown in FIG. 1;
  • FIG. 14 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 13.
  • the present invention provides a sound emitting device 100, which includes a sound emitting unit 10, and the sound emitting unit 10 includes a basin frame 1, a vibration system 2, a magnetic circuit system 3, and a rear shell 4.
  • the vibration system 2 and the magnetic circuit system 3 are respectively fixed on opposite sides of the basin frame 1 and jointly enclose an inner cavity 101.
  • the vibration system 2 includes a diaphragm 21 fixed to the basin frame 1.
  • the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.
  • the magnetic circuit system 3 includes a magnetic yoke 31 opposed to the diaphragm 21 and a magnetic steel 32 fixed to the magnetic yoke 31.
  • the yoke 31 includes a yoke body 311 that is spaced apart from the diaphragm 2, a leakage portion 312 penetrating the yoke body 311, and the outer edge of the yoke body 311 is approached along the basin 1
  • a ring-shaped sealing wall 313 that is bent and extended in the direction of the vibration system 2 is attached and fixed to the outer peripheral side of the basin frame 1 and seals the inner cavity 101 so as to pass through the yoke 31
  • Its own structural design makes the inner cavity 101 of the sound-producing monomer 10 form a seal, omitting an additional structure for sealing, and reducing the assembly process.
  • the yoke body 311 and the diaphragm 21 are respectively fixed on opposite sides of the basin frame 1.
  • the so-called outer periphery in this embodiment means that when the yoke body 311 is arranged in a ring shape, the yoke body 311 has an outer periphery and an inner periphery, and the sealing wall 313 is formed by the outer periphery of the yoke body 311. When the yoke body 311 is flat, the sealing wall 313 extends from the periphery of the yoke body 311.
  • the rear shell 4 is covered and fixed on the side of the yoke body 311 away from the vibration system 2.
  • the rear housing 4 and the yoke body 311 jointly enclose a closed rear cavity 102, and the leakage portion 312 connects the inner cavity 101 with the rear cavity 102.
  • the formation of the rear cavity 102 effectively improves the acoustic performance of the sound emitting device 100, especially low-frequency acoustic performance, and the rear cavity 102 is used for vibration absorption, so that the sound emitting device 100 is not used in electronic products such as mobile terminals. It will cause the shell vibration phenomenon of electronic products such as mobile terminals, which effectively increases the user experience effect of customers.
  • the rear shell 4 is provided with a leakage hole 41 penetrating therethrough, and the leakage hole 41 connects the rear cavity 102 with the outside to balance the sound pressure in the rear cavity 102.
  • the sound generating device 100 further includes a damping member 5 attached to the yoke body 311 and completely covering the leakage portion 312 for adjusting the damping of the leakage portion 312 and improving the acoustic performance.
  • the rear shell 4 and the sealing wall 313 are made of metal, ceramic or glass materials.
  • the rear housing 4 and the sealing wall 313 are made of metal materials. This arrangement can be made thinner with the same structural strength, so that the size of the sound emitting device 100 in the vibration direction perpendicular to the diaphragm 21 can be minimized.
  • the rear case 4 is covered on the yoke body 311, so that the size of the rear cavity 102 along the vibration direction perpendicular to the vibration system 2 does not exceed the size of the sound emitting device 100 itself, which is more suitable for mobile terminals with small lateral space.
  • the technical problems to be solved by the present invention can be realized, the number of components is effectively reduced, the structure is simplified, and the assembly efficiency is improved.
  • the sound-producing unit 10 also includes a front cover 7 which is arranged on the side of the basin frame 1 close to the diaphragm 21 and encloses the front sound cavity 103 with the diaphragm 21, and the front cover 7 is provided with an edge
  • the vibration direction of the diaphragm 21 penetrates the through hole 71 thereon, and the through hole 71 connects the front acoustic cavity 103 with the outside.
  • the setting of the front cover 7 effectively improves the mid- and high-frequency acoustic performance.
  • the sound generating device 100 further includes a breathable damping member 8 attached to the front cover 7, and the breathable damping member 8 completely covers the through hole 71.
  • the damping of the breathable damping member 8 can be adjusted in the other direction to adjust the mid-frequency and high-frequency performance of the sound generating device 100.
  • the through holes 71 include a plurality of and are arranged in an array to improve sound stability and balance.
  • the part of the diaphragm 21 fixed to the basin frame 1 is provided with a shape protruding toward the front cover 7
  • the ring-shaped sealing boss 211 when assembling, the front cover 7 is pressed on the sealing boss 211 and the sealing boss 211 is compressed to form a seal, and the sealing reliability is better.
  • the sealing wall 313 or the rear housing 4 is at least partially grounded.
  • This structure combines the sealing wall 313 and the rear shell 4 on the basis that both are made of metal materials, so as to realize the shielding effect of the post-hair cavity and improve the stability.
  • the arrangement of the sealing wall 313 or the rear shell 4 made of metal material can be designed to be thinner while meeting the structural strength, thereby further reducing the lateral size of the sound emitting device 100 along the direction perpendicular to the vibration direction.
  • FIG. 5 is a schematic diagram of the structure of adding conductive elements in FIG. 3.
  • the sealing wall 4313 and the rear shell 404 are both made of metal materials.
  • the sound emitting device 400 further includes a conductive member 6, one end of the conductive member 6 is connected to at least one of the sealing wall 4313 and the rear case 404, and the other end of the conductive member 6 is used for grounding, thereby forming
  • the shielding effect prevents the sound emitting device 400 from being subjected to external electromagnetic interference, and has better working reliability.
  • FIG. 6 is a schematic diagram of the three-dimensional structure of another derivative embodiment of FIG. 5. That is, in the sound generating device 500, the conductive member 56 and the sealing wall 5313 or the rear shell 54 are an integral structure. That is, the conductive member 56 is formed by extending the sealing wall 5313, or the conductive member 56 is formed by extending the rear shell 54. For example, the conductive member 56 and the rear shell 54 are integrally formed.
  • the integrated structure design reduces the number of components and improves assembly efficiency.
  • FIG. 7 is a schematic structural diagram of another embodiment in which a conductive member is added in FIG. 5.
  • the difference between this embodiment and the embodiment shown in FIG. 3 lies in the structure and function of the conductive member.
  • the sound emitting device 600 further includes a conductive member 66.
  • the conductive member 66 includes two mutually insulated electrical pathways.
  • the sounding unit 610 is powered; the other electrical channel is used to ground at least one of the sealing wall 6313 and the rear shell 64 to form a shield for the sounding unit 610.
  • the conductive member 66 is used to form a shielding effect together with the rear shell 64 and the sealing wall 6313, and is also used to supply power to the sound generating unit 610, which has a simpler structure and can achieve dual functions.
  • the conductive member 66 is an FPC structure. As shown in FIGS. 7-8, the conductive member 66 includes a first arm 661 connected to the yoke 631, and is formed by opposite ends of the first arm 661.
  • the second arm 662 extending in the direction of the basin frame 61, the third arm 663 extending in the direction away from the sealing wall 6313 from the first arm 661, and the vibration direction of the diaphragm 621 by the first arm 661
  • the fourth arm 664 bent and extended toward the rear shell 64 and the fourth arm 664 bent and extended from the end of the fourth arm 664 in the direction perpendicular to the vibration direction of the diaphragm 621 and fixed to the rear shell 64 Five arms 665.
  • the first arm 661 is electrically connected to the magnetic yoke 631 or the rear housing 64
  • the second arm 662 is electrically connected to the sound unit 610
  • the third arm 663 is used to connect external electrical signals.
  • the fifth arm 665 is used for grounding.
  • the second arm 662 is fixed to the basin frame 61 and is electrically connected to the vibration system 62
  • the third arm 663 is used for connecting external electrical signals
  • the fifth arm 665 is used for grounding. So as to realize the function of providing electric signal for the vibration system, and also realize the shielding function.
  • the first arm 661, the fourth arm 664, and the fifth arm 665 jointly connect the rear housing 64 or the sealing wall 6313 to the ground, forming an electrical path for shielding the sounding monomer 610; the first The arm 661, the second arm 662, and the third arm 663 jointly realize the electrical connection between the sound emitting unit 610 and the external electrical signal, which is realized as another electrical path through which the sound emitting unit 610 communicates with the external electrical signal.
  • FIG. 9 is a schematic structural diagram of the embodiment in FIG. 3 in which a sound conducting shell is added to form a side sound emitting structure.
  • the main difference is that the sound emitting device is formed from the front side sounding structure to the side sounding structure.
  • the sound-emitting device 800 further includes a sound-conducting shell 9 covering one end of the sound-emitting monomer 810 away from the rear shell 84, and the sound-conducting shell 9 has a sound-guiding cavity 90 forming a side sound-emitting structure 91, and the sound-guiding cavity It is connected to the vibrating membrane 821 of 90.
  • the side sound structure 91 can better guide sound, which is convenient for use when the front sound is blocked, and has higher flexibility in use.
  • the sound conducting shell 9 includes a sound conducting shell plate 901 arranged at intervals on the side of the vibrating membrane 821 away from the magnetic circuit system 83, and a sound conducting shell plate 901 extending from the periphery of the sound conducting shell plate 901 to the vibrating membrane 821
  • the sound guide shell extension wall 902 is bent and extended in the direction, the sound guide shell 9 and the diaphragm 821 jointly enclose the sound guide cavity 90, and the side sound emitting structure 91 is provided through the sound guide shell extension wall 902,
  • the side sound structure 91 connects the sound guide cavity 90 with the outside to form a side sound, which is convenient for flexible use of different installation positions.
  • the sound guide cavity 90 can be directly connected with the diaphragm 821 (that is, without the front cover 807 structure), or the diaphragm 812 can first communicate with the front sound cavity 8103, and then communicate with the sound guide cavity 90 through the through hole 871. In order to achieve indirect connectivity, this is all feasible.
  • FIG. 10 is a schematic diagram of an embodiment in which a breathable spacer is added in FIG. 4.
  • the rear shell 94 includes a rear shell plate 941 spaced apart and opposed to the yoke body 9311, and a peripheral side of the rear shell plate 941 is bent and extended in the direction of the yoke body 9311 and abutted and fixed.
  • the sound emitting device 900 further includes a gas-permeable spacer 99 located in the rear cavity 9102, and the gas-permeable spacer 99 includes a space opposite to the rear shell plate 941
  • the spacer body 991 is provided with a spacer extension part 992 bent and extended in the direction of the rear shell plate 941 from the periphery of the spacer body 991, and a spacer extension part 992 away from the spacer body 991
  • the spacer fixing portion 993 is bent and extended toward the rear shell extension wall 942 at one end.
  • the spacer extension part 992 is spaced apart from the rear shell extension wall 942, and the spacer fixing part 993 is fixed to the rear shell plate 941.
  • the air-permeable spacer 99 and the rear shell 94 jointly enclose a powder filling space 990.
  • the powder filling space 990 is used to fill sound-absorbing particles to form a D-BASS virtual sound cavity, which further improves the acoustic performance.
  • the spacer extension 992 and the rear housing extension wall 942 are spaced apart so that the air flow in the rear cavity 9102 is smoother and the acoustic performance is better.
  • FIG. 11 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 10.
  • the side of the spacer body 1991 close to the yoke body 1311 is recessed in a direction away from the yoke body 1311 to form an escape step 1994, and the escape step 1994 is in line with the leakage portion 1312 Pair set.
  • This structural arrangement can make the leakage of the inner cavity 1101 of the sound emitting device 1000 smoother, thereby improving the sound emitting performance.
  • FIG. 13 is a schematic structural diagram of an embodiment in which a positioning piece is added to the sound emitting device shown in FIG. 1.
  • the sounding device 1100 further includes at least two positioning pieces 88 which are connected to the sealing wall 11313 or the rear shell 114 respectively.
  • One end of the positioning piece 88 away from the sealing wall 11313 or the rear housing 114 is provided with a positioning hole 881 penetrating therethrough, which is used to fix and position the sound emitting device 1100 and the application terminal.
  • the positioning hole 881 is fixed on the entire terminal device, which is simple and convenient, and the positioning sheet 88 is provided with at least two positioning pieces 88 to form a positioning fixation more effectively.
  • the two positioning pieces 88 are connected to the opposite sides or two diagonal corners of the sealing wall 11313 or the rear shell 114, and the symmetrical arrangement makes the sounding device 1100 and the whole terminal have a better positioning and fixing effect.
  • the positioning piece 88 is fixed by welding, for example, the rear housing 114 is fixed by welding, that is, the positioning piece 88 and the rear housing 114 are a separate structure of two devices.
  • the positioning piece 88 can also be used for grounding at the same time to form a shield for the rear shell 114.
  • the positioning piece 88 is connected to the two opposite corners of the sealing wall 11313 or the rear shell 114.
  • FIG. 14 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 13.
  • the positioning piece 1288 is formed by the sealing wall 12313 or the rear shell 124 extending outward, that is, the positioning piece 1288 and
  • the sealing wall 12313 or the rear shell 124 is an integrally formed structure, for example, the positioning sheet 1288 and the rear shell 124 are integrally formed.
  • the molding is simple, the number of components is reduced, and the assembly efficiency is improved.
  • the positioning piece 88 is connected to opposite sides of the sealing wall 12313 or the rear shell 114.
  • the yoke includes a yoke body spaced apart from the vibration system, a leakage part penetrating the yoke body, and a peripheral edge of the yoke body.
  • a ring-shaped sealing wall that is bent and extended along the basin frame in the direction close to the vibration system, and the sealing wall is attached and fixed to the outer peripheral side of the basin frame and seals the inner cavity through the yoke itself
  • the structure of the sealed inner cavity is not only simple in structure, and small in overall size increase along the direction of vibration, but also suitable for terminals with small installation space; at the same time, a rear shell is provided on the side of the yoke body away from the vibration system, The back shell and the yoke body jointly enclose a closed back cavity, the leaking part communicates the inner cavity with the back cavity, and the closed back cavity structure makes the sound device suitable for use in a mobile terminal Vibration absorption avoids the occurrence of shell vibration and makes the user experience better.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本实用新型提供了一种发声器件，其包括振动系统和磁路系统，磁路系统包括与振动系统间隔相对的磁轭和固定于磁轭的磁钢，磁轭包括与振动系统间隔相对的磁轭本体、贯穿磁轭本体的泄露部以及由磁轭本体向远离振动系统的方向弯折延伸的呈环状的延伸壁，延伸壁沿振动系统的振动方向位于磁钢的外围；发声器件还包括盖设固定于延伸壁远离磁轭本体一端的盖板，盖板、延伸壁以及磁轭本体共同围成密闭的后腔，泄露部与后腔连通；磁轭还设有贯穿其上的泄露孔，泄露孔将后腔与外界连通。与相关技术相比，本实用新型的发声器件结构简单、声学性能优、用户体验效果好。

Description

发声器件 技术领域
本实用新型涉及电声转换领域，尤其涉及一种运用于便携式移动电子产品的发声器件。
 背景技术
发声器件又名扬声器，广泛运用于便携式移动电子产品中，比如手机，实现将音频信号转化为声音播放，发声器件响度大，振幅度。
相关技术的发声器件包括盆架、分别固定于所述盆架的振动系统和具有磁间隙的磁路系统，所述磁路系统驱动所述振动系统振动发声，所述振动系统包括固定于所述盆架的振膜以及固定于所述振膜并插设于所述磁间隙以驱动所述振膜振动发声的音圈。
 技术问题
然而，相关技术的发声器件因不具有后腔结构或后腔为开放式结构，其运用在手机等便携式移动电子产品中时会引起手机壳振的问题，造成用户体验效果不好；而手机空间尺寸有限，发声器件不能设计成现有技术中的带后腔的扬声器箱结构以克服该问题。
因此，实有必要提供一种新的发声器件解决上述技术问题。
 技术解决方案
本实用新型的目的在于提供一种结构简单、声学性能好、用户体验效果好的发声器件。
为了达到上述目的，本实用新型提供了一种发声器件，其包括发声单体，所述发声单体包括盆架、分别固定于所述盆架并共同围成内腔的振动系统和磁路系统，所述振动系统包括固定于所述盆架的振膜，所述磁路系统包括与所述振膜间隔相对的磁轭，所述磁轭包括与所述振膜间隔相对的磁轭本体、贯穿所述磁轭本体的泄露部以及由所述磁轭本体的外侧周缘沿所述盆架向靠近所述振膜方向弯折延伸且呈环状的密封壁，所述密封壁贴合固定于所述盆架的外周侧并将所述内腔密封；所述发声器件还包括盖设固定于所述磁轭本体远离所述振膜一侧的后壳，所述后壳与所述磁轭本体共同围成密闭的后腔，所述泄露部将所述内腔与所述后腔连通；所述后壳还设有贯穿其上的泄露孔，所述泄露孔将所述后腔与外界连通。
优选的，所述发声器件还包括贴设于所述磁轭本体并完全覆盖所述泄露部的阻尼件。
优选的，所述密封壁及所述后壳均为金属材料制成。
优选的，所述密封壁或所述后壳至少部分接地。
优选的，所述发声器件还包括导电件，所述导电件的一端电连接于所述密封壁和所述后壳中的至少一个，所述导电件的另一端用于接地。
优选的，所述导电件由所述密封壁和所述后壳中的至少一个延伸形成。
优选的，所述发声器件还包括导电件，所述导电件包括两条电性通路，其中一条所述电性通路用于连接所述发声单体与外部电信号，另一条所述电性通道路用于将所述密封壁和所述后壳中的至少一个接地。
优选的，所述发声器件还包括至少两个定位片，两个所述定位片连接于所述密封壁或所述后壳的相对两侧或两对角处，所述定位片设有贯穿其上的定位孔。
优选的，所述定位片由所述密封壁或所述后壳向外延伸形成。
优选的，所述发声单体还包括盖设于所述盆架靠近所述振膜一侧并与所述振膜围成前声腔的前盖，所述前盖设有沿所述振动系统的振动方向贯穿其上的通孔，所述通孔将所述前声腔与外界连接。
优选的，所述发声器件还包括贴设于所述前盖的透气阻尼件，所述透气阻尼件完全覆盖所述通孔。
优选的，所述振膜固定于所述盆架的部分设有向靠近所述前盖方向凸出的呈环状的密封凸台，所述前盖压设于所述密封凸台形成密封。
优选的，所述发声器件还包括盖设于所述发声单体远离所述后壳一侧的导声壳，所述导声壳具有形成侧发声结构的导声腔，所述导声腔与所述振膜连通。
优选的，所述后壳包括与所述磁轭本体间隔相对的后壳板和由所述后壳板周侧向所述磁轭本体方向弯折延伸并抵接固定于所述磁轭本体的后壳延伸壁；所述发声器件还包括位于所述后腔内的透气隔离件，所述透气隔离件包括与所述后壳板间隔相对设置的隔离件本体、由所述隔离件本体的周缘向所述后壳板方向弯折延伸的隔离件延伸部以及由所述隔离件延伸部远离所述隔离件本体的一端弯折延伸的隔离件固定部；所述隔离件延伸部与所述后壳延伸壁间隔设置，所述隔离件固定部固定于所述后壳板；所述透气隔离件与所述后壳板共同围成灌粉空间。
优选的，所述隔离件本体靠近所述磁轭本体的一侧向远离所述磁轭本体方向凹陷形成避让台阶，所述避让台阶与所述泄露部正对设置。
 有益效果
与相关技术相比，本实用新型的发声器件中，所述磁轭包括与所述振动系统间隔相对的磁轭本体、贯穿所述磁轭本体的泄露部以及由所述磁轭本体的外侧周缘沿所述盆架向靠近所述振动系统方向弯折延伸且呈环状的密封壁，所述密封壁贴合固定于所述盆架的外周侧并将所述内腔密封，通过磁轭本身的结构密封内腔，不仅结构简单、沿垂直于振动方向的整体尺寸增加小，更适用于安装空间小的终端；同时，在所述磁轭本体远离所述振动系统一侧盖设后壳，所述后壳与所述磁轭本体共同围成密闭的后腔，所述泄露部将所述内腔与所述后腔连通，而且密闭的后腔结构使得该发声器件运用于移动终端后可吸振，避免了壳振现象的产生，使得用户体验效果更好。
 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为本实用新型发声器件的立体结构示意图；
图2为本实用新型发声器件的部分立体结构分解示意图；
图3为沿图1中A-A线的剖示图；
图4为沿图1中B-B线的剖示图；
图5为图3中增加导电件的结构示意图；
图6为图5的另一种衍生实施方式的结构示意图；
图7为图5中增加导电件的另一实施方式的结构示意图；
图8为沿图7中C-C线的剖示图；
图9为图3中增加导声壳形成侧发声结构的实施方式的结构示意图；
图10为图4中增加透气隔离件的实施方式示意图；
图11为图10所示实施方式的衍生实施方式结构示意图；
图12为图1所示发声器件的振膜设置密封凸台的结构示意图；
图13为图1所示发声器件增加定位片的实施方式结构示意图；
图14为图13所示实施方式的衍生实施方式结构示意图。
 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。
请同时参阅图1-4，本实用新型提供了一种发声器件100，其包括发声单体10，所述发声单体10包括盆架1、振动系统2、磁路系统3和后壳4。
所述振动系统2和所述磁路系统3分别固定于所述盆架1的相对两侧并共同围成内腔101，所述振动系统2包括固定于所述盆架1的振膜21，所述磁路系统3驱动所述振动系统2振动发声。
所述磁路系统3包括与所述振膜21间隔相对的磁轭31和固定于所述磁轭31的磁钢32。所述磁轭31包括与所述振膜2间隔相对的磁轭本体311、贯穿所述磁轭本体311的泄露部312以及由所述磁轭本体311的外侧缘沿所述盆架1向靠近所述振动系统2的方向弯折延伸的呈环状的密封壁313，所述密封壁313贴合固定于所述盆架1的外周侧并将所述内腔101密封，从而通过磁轭31的自身结构设计使发声单体10的内腔101形成密封，省去额外用于密封的结构，减少了装配工序。其中，磁轭本体311与振膜21分别固定于盆架1的相对两侧。
需要说明的是，本实施方式中所谓外侧周缘是指：当磁轭本体311设置呈环状时，则磁轭本体311存在外侧周缘和内侧周缘，则密封壁313由磁轭本体311的外侧周缘延伸；当磁轭本体311为平板状时，则密封壁313由磁轭本体311的周缘延伸。
所述后壳4盖设固定于所述磁轭本体311远离所述振动系统2的一侧。所述后壳4、所述磁轭本体311共同围成密闭的后腔102，所述泄露部312将所述内腔101与所述后腔102连通。所述后腔102的形成有效的提高了所述发声器件100的声学性能，尤其是低频声学性能，且后腔102用于吸振，使得所述发声器件100运用于移动终端等电子产品中后不会使移动终端等电子产品产生壳振现象，有效增加了客户的用户体验效果。本实施方式中，所述后壳4设有贯穿其上的泄露孔41，所述泄露孔41将所述后腔102与外界连通用于平衡后腔102内的声压。
本实施方式中，所述发声器件100还包括贴设于磁轭本体311并完全覆盖所述泄露部312的阻尼件5，用于调节泄露部312的阻尼，改善声学性能。
所述后壳4及所述密封壁313为金属或陶瓷或玻璃材料制成，这都是可行的。本实施方式中，优选所述后壳4和所述密封壁313为金属材料制成。该设置可在同样结构强度的情况下，更可能薄，从而可尽量减小发声器件100在垂直于振膜21的振动方向的尺寸。而且，后壳4盖设于磁轭本体311，则使得后腔102沿垂直于振动系统2的振动方向的尺寸不会超出发声器件100本身的尺寸，更适用于横向空间较小的移动终端。
通过将磁轭31设计成上述结构，即可实现本实用新型需要解决的技术问题，有效减少元件数量和简化结构，提高装配效率。
所述发声单体10还包括盖设于所述盆架1靠近所述振膜21一侧并与所述振膜21围成前声腔103的前盖7，所述前盖7设有沿所述振膜21的振动方向贯穿其上的通孔71，所述通孔71将所述前声腔103与外界连接。前盖7的设置有效改善了中高频声学性能。
为了进一步改善发声器件100的中频高频性能，所述发声器件100还包括贴设于所述前盖7的透气阻尼件8，所述透气阻尼件8完全覆盖所述通孔71，一方面用于防异物进入前声腔103，另一方向可通过调节所述透气阻尼件8的阻尼以调节发声器件100的中频高频性能。
本实施方式中，所述通孔71包括多个且呈阵列排布，用于改善发声稳定性和平衡性。
因振膜21固定于盆架1的部分（即胶合面）的面积较小，宽度较窄，其实现密封时的可靠性差。因此，本实施方式中，请结合图12所示，在所述发声器件100中，所述振膜21固定于所述盆架1的部分设有向靠近所述前盖7方向凸出的呈环状的密封凸台211，装配时，所述前盖7压设于所述密封凸台211并通过压缩所述密封凸台211形成密封，密封可靠性更优。
请继续参图1-4，本实施方式中，所述密封壁313或所述后壳4至少部分接地。该结构结合密封壁313和后壳4均为金属材料制成的基础上，从而实现发后腔屏蔽作用，提高稳定性。金属材料制成上述密封壁313或所述后壳4的设置，可在满足结构强度的同时设计更薄，从而进一步减小发声器件100在沿垂直于振动方向的横向尺寸。
请结合图5所示，为图3中增加导电件的结构示意图。具体的，本实施方式中，所述发声器件400中，所述密封壁4313和所述后壳404均为金属材料制成。所述发声器件400还包括导电件6，所述导电件6的一端连接于所述密封壁4313和所述后壳404中的至少一个，所述导电件6的另一端用于接地，从而形成屏蔽作用，使得发声器件400避免受外界电磁干扰，工作可靠性更好。
请结合图6，为图5的另一种衍生实施方式的立体结构示意图。即所述发声器件500中，所述导电件56与所述密封壁5313或所述后壳54为一体结构。即，所述导电件56由所述密封壁5313为延伸形成，或所述导电件56由所述后壳54延伸形成。比如，所述导电件56与所述后壳54为一体成型结构。一体结构设计减少部件数量，提高装配效率。
请结合图7所示，为图5中增加导电件的另一实施方式的结构示意图。该实施方式与图3所示的实施方式区别在于，导电件的结构和功能不同。
所述发声器件600还包括导电件66，所述导电件66包括两条相互绝缘的电性通路，其中一条所述电性通路用于连接所述发声单体610与外部电信号，用于为发声单体610供电；另一条所述电性通道路用于将所述密封壁6313和所述后壳64中的至少一个接地，形成对发声单体610的屏蔽。本实施方式中，导电件66则即用于与后壳64及密封壁6313共同形成屏蔽作用，而且还用于为发声单体610供电，结构更简单且能实现双重功能。
比如导电件66为一FPC结构，请结合图7-8所示，所述导电件66包括连接于所述磁轭631的第一臂661、由所述第一臂661的相对两端向所述盆架61方向延伸的第二臂662、由所述第一臂661向远离所述密封壁6313方向延伸的第三臂663、由所述第一臂661沿所述振膜621的振动方向向靠近所述后壳64弯折延伸的第四臂664以及由所述第四臂664的末端沿垂直于所述振膜621的振动方向弯折延伸的并固定于所述后壳64的第五臂665。
所述第一臂661与所述磁轭631或后壳64电连接，所述第二臂662与所述发声单体610电连接，所述第三臂663用于连接外部电信号，所述第五臂665用于接地。具体的，所述第二臂662固定于所述盆架61并与所述振动系统62电连接，所述第三臂663用于连接外部电信号，所述第五臂665用于接地。从而实现即为振动系统提供电信号作用，又能实现屏蔽作用。即，第一臂661、第四臂664及第五臂665共同实现将所述后壳64或密封壁6313与地连接，形成对发声单体610实现屏蔽的一条电性通路；所述第一臂661、所述第二臂662以及所述第三臂663共同实现将发声单体610与外部电信号电连接，实现为发声单体610与外部电信号连通的另一条电性通路。
请结合图9所示，为图3中增加导声壳形成侧发声结构的实施方式的结构示意图。其主要区别在于将发声器件由正面发声形成侧面发声结构。
所述发声器件800还包括盖设于所述发声单体810远离所述后壳84一端的导声壳9，所述导声壳9具有形成侧发声结构91的导声腔90，所述导声腔与90所述振膜821连通。该侧发声结构91可更好的引导发声，便于正面发声被挡的情况下使用，使用灵活性更高。
具体的，所述导声壳9包括间隔设置于所述振膜821远离所述磁路系统83一侧的导声壳板901以及由所述导声壳板901的周缘向所述振膜821方向弯折延伸的导声壳延伸壁902，所述导声壳9与所述振膜821共同围成所述导声腔90，所述侧发声结构91贯穿所述导声壳延伸壁902设置，所述侧发声结构91将所述导声腔90与外界连通，形成侧发声，便于安装位置不同的灵活运用。
需要说明的是，导声腔90可与振膜821直接连通（即无前盖807结构），也可以是振膜812先与前声腔8103连通，再通过所述通孔871与导声腔90连通，从而实现间接连通，这都是可行的。
请结合图10，为图4中增加透气隔离件的实施方式示意图。发声器件900中，所述后壳94包括与所述磁轭本体9311间隔相对的后壳板941和由所述后壳板941周侧向所述磁轭本体9311方向弯折延伸并抵接固定于所述磁轭本体9311的后壳延伸壁942；所述发声器件900还包括位于所述后腔9102内的透气隔离件99，所述透气隔离件99包括与所述后壳板941间隔相对设置的隔离件本体991、由所述隔离件本体991的周缘向所述后壳板941方向弯折延伸的隔离件延伸部992以及由所述隔离件延伸部992远离所述隔离件本体991的一端向所述后壳延伸壁942方向弯折延伸的隔离件固定部993。
所述隔离件延伸部992与所述后壳延伸壁942间隔设置，所述隔离件固定部993固定于所述后壳板941。所述透气隔离件99与所述后壳94共同围成灌粉空间990，灌粉空间990用于填充吸音颗粒以形成D-BASS虚拟声腔，进一步提高声学性能。而隔离件延伸部992与所述后壳延伸壁942间隔设置的结构使得后腔9102内的气流流通更顺畅，声学性能更好。
请结合图11所示，为图10所示实施方式的衍生实施方式结构示意图。所述发声器件1000中，所述隔离件本体1991靠近所述磁轭本体1311的一侧向远离所述磁轭本体1311方向凹陷形成避让台阶1994，所述避让台阶1994与所述泄露部1312正对设置。该结构设置可使发声器件1000的内腔1101的泄露更顺畅，从而改善发声性能。
请结合图13所示，为图1所示发声器件增加定位片的实施方式结构示意图。所述发声器件1100还包括至少两个定位片88并分别与密封壁11313或后壳114连接。所述定位片88远离密封壁11313或后壳114的一端设有贯穿其上的定位孔881，用于将发声器件1100与运用终端整机固定定位，比如为螺纹孔，使用螺钉则可通过所述定位孔881固定在终端整机，简单方便，而定位片88设置至少两个可更有效的形成定位固定。为了进一步提高固定稳定性，两个所述定位片88连接于所述密封壁11313或后壳114的相对两侧或两对角处，对称设置使发声器件1100与终端整机定位固定效果更优。本实施方式中，定位片88通过焊接形成固定，比如焊接固定后壳114，即定位片88与后壳114为两个器件的分体结构。当然，当后壳114为金属材料制成时，定位片88也可用于同时接地，为后壳114形成屏蔽。本实施方式中定位片88连接于所述密封壁11313或后壳114的两对角处。
请结合图14所示，为图13所示实施方式的衍生实施方式结构示意图。其与图13所示实施方式的区别在于，本实施方式中的发声器件1200中，所述定位片1288中由所述密封壁12313或所述后壳124向外延伸形成，即定位片1288与所述密封壁12313或所述后壳124为一体成型结构，比如定位片1288与后壳124一体成型。成型简单，减少器件数量，提高装配效率。本实施方式中定位片88连接于所述密封壁12313或后壳114的相对两侧。
与相关技术相比，本实用新型的发声器件中，所述磁轭包括与所述振动系统间隔相对的磁轭本体、贯穿所述磁轭本体的泄露部以及由所述磁轭本体的外侧周缘沿所述盆架向靠近所述振动系统方向弯折延伸且呈环状的密封壁，所述密封壁贴合固定于所述盆架的外周侧并将所述内腔密封，通过磁轭本身的结构密封内腔，不仅结构简单、沿垂直于振动方向的整体尺寸增加小，更适用于安装空间小的终端；同时，在所述磁轭本体远离所述振动系统一侧盖设后壳，所述后壳与所述磁轭本体共同围成密闭的后腔，所述泄露部将所述内腔与所述后腔连通，而且密闭的后腔结构使得该发声器件运用于移动终端后可吸振，避免了壳振现象的产生，使得用户体验效果更好。
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 (15)

  1. 一种发声器件，其包括发声单体，所述发声单体包括盆架、分别固定于所述盆架并共同围成内腔的振动系统和磁路系统，所述振动系统包括固定于所述盆架的振膜，所述磁路系统包括与所述振膜间隔相对的磁轭，其特征在于，所述磁轭包括与所述振膜间隔相对的磁轭本体、贯穿所述磁轭本体的泄露部以及由所述磁轭本体的外侧周缘沿所述盆架向靠近所述振膜方向弯折延伸且呈环状的密封壁，所述密封壁贴合固定于所述盆架的外周侧并将所述内腔密封；所述发声器件还包括盖设固定于所述磁轭本体远离所述振膜一侧的后壳，所述后壳与所述磁轭本体共同围成密闭的后腔，所述泄露部将所述内腔与所述后腔连通；所述后壳还设有贯穿其上的泄露孔，所述泄露孔将所述后腔与外界连通。
  2. 根据权利要求1所述的发声器件，其特征在于，所述发声器件还包括贴设于所述磁轭本体并完全覆盖所述泄露部的阻尼件。
  3. 根据权利要求1所述的发声器件，其特征在于，所述密封壁及所述后壳均为金属材料制成。
  4. 根据权利要求3所述的发声器件，其特征在于，所述密封壁或所述后壳至少部分接地。
  5. 根据权利要求3所述的发声器件，其特征在于，所述发声器件还包括导电件，所述导电件的一端电连接于所述密封壁和所述后壳中的至少一个，所述导电件的另一端用于接地。
  6. 根据权利要求5所述的发声器件，其特征在于，所述导电件由所述密封壁和所述后壳中的至少一个延伸形成。
  7. 根据权利要求3所述的发声器件，其特征在于，所述发声器件还包括导电件，所述导电件包括两条电性通路，其中一条所述电性通路用于连接所述发声单体与外部电信号，另一条所述电性通道路用于将所述密封壁和所述后壳中的至少一个接地。
  8. 根据权利要求3所述的发声器件，其特征在于，所述发声器件还包括至少两个定位片，两个所述定位片连接于所述密封壁或所述后壳的相对两侧或两对角处，所述定位片设有贯穿其上的定位孔。
  9. 根据权利要求8所述的发声器件，其特征在于，所述定位片由所述密封壁或所述后壳向外延伸形成。
  10. 根据权利要求1所述的发声器件，其特征在于，所述发声单体还包括盖设于所述盆架靠近所述振膜一侧并与所述振膜围成前声腔的前盖，所述前盖设有沿所述振动系统的振动方向贯穿其上的通孔，所述通孔将所述前声腔与外界连接。
  11. 根据权利要求10所述的发声器件，其特征在于，所述发声器件还包括贴设于所述前盖的透气阻尼件，所述透气阻尼件完全覆盖所述通孔。
  12. 根据权利要求10所述的发声器件，其特征在于，所述振膜固定于所述盆架的部分设有向靠近所述前盖方向凸出的呈环状的密封凸台，所述前盖压设于所述密封凸台形成密封。
  13. 根据权利要求1所述的发声器件，其特征在于，所述发声器件还包括盖设于所述发声单体远离所述后壳一侧的导声壳，所述导声壳具有形成侧发声结构的导声腔，所述导声腔与所述振膜连通。
  14. 根据权利要求1所述的发声器件，其特征在于，所述后壳包括与所述磁轭本体间隔相对的后壳板和由所述后壳板周侧向所述磁轭本体方向弯折延伸并抵接固定于所述磁轭本体的后壳延伸壁；所述发声器件还包括位于所述后腔内的透气隔离件，所述透气隔离件包括与所述后壳板间隔相对设置的隔离件本体、由所述隔离件本体的周缘向所述后壳板方向弯折延伸的隔离件延伸部以及由所述隔离件延伸部远离所述隔离件本体的一端弯折延伸的隔离件固定部；所述隔离件延伸部与所述后壳延伸壁间隔设置，所述隔离件固定部固定于所述后壳板；所述透气隔离件与所述后壳板共同围成灌粉空间。
  15. 根据权利要求1所述的发声器件，其特征在于，所述隔离件本体靠近所述磁轭本体的一侧向远离所述磁轭本体方向凹陷形成避让台阶，所述避让台阶与所述泄露部正对设置。
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