WO2021115031A1 - 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
WO2021115031A1
WO2021115031A1 PCT/CN2020/129014 CN2020129014W WO2021115031A1 WO 2021115031 A1 WO2021115031 A1 WO 2021115031A1 CN 2020129014 W CN2020129014 W CN 2020129014W WO 2021115031 A1 WO2021115031 A1 WO 2021115031A1
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WO
WIPO (PCT)
Prior art keywords
housing
side magnetic
bending section
magnetic conductive
voice coil
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PCT/CN2020/129014
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English (en)
French (fr)
Inventor
崔现丽
刘华伟
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歌尔股份有限公司
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Publication of WO2021115031A1 publication Critical patent/WO2021115031A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil

Definitions

  • the invention relates to the technical field of sound energy conversion, in particular to a sound generating device and electronic equipment.
  • the side of the side magnetic guide plate close to the magnetic gap will be thickened.
  • the current thickening method is to use a thicker side magnetic conductive plate, and then thin the part of the side magnetic conductive plate corresponding to the diaphragm fold ring, so that the part of the side magnetic conductive plate close to the magnetic gap has the original thickness.
  • the part corresponding to the diaphragm fold ring is provided with a groove to provide space for the vibration of the diaphragm.
  • the thinned part has a small thinning amount and cannot reach the required depth, while the thicker side
  • the magnetic conductive plate will cause the vibration space of the diaphragm to become smaller, which in turn leads to poor sound output of the sound generating device.
  • the main purpose of the present invention is to provide a sound generating device, which aims to increase the thickness of the part of the side magnetic conductive plate close to the voice coil without affecting the vibration space of the diaphragm.
  • the sound generating device provided by the present invention includes:
  • the magnetic circuit system is provided in the housing and includes a side magnet and a side magnetic conductive plate provided on the upper end of the side magnet, and a magnetic gap is formed on the inner side of the side magnet; and,
  • the vibration system includes a diaphragm connected to the housing and a voice coil provided on the diaphragm, the voice coil at least partially extending into the magnetic gap;
  • a side of the side magnetic guide plate close to the magnetic gap is provided with a bending portion, and the bending portion is at least partially bent in the direction of the diaphragm.
  • the bending portion includes a first bending section, and the first bending section is connected to the side magnetic conductive plate and extends in the direction of the diaphragm.
  • the bending portion further includes a second bending section connected to the first bending section, and the second bending section starts from the first bending section in a direction away from the voice coil extend.
  • the surface of the first bending section facing the voice coil is arranged in a straight surface.
  • the second bending section is arranged in contact with the surface of the side magnetic guide plate.
  • the housing has a ring shape
  • the side magnetic guide plate extends in a ring shape along the circumference of the housing and is arranged around the voice coil.
  • a side of the side magnetic guide plate close to the magnetic gap is provided with a plurality of avoidance notches, and the plurality of avoidance notches separate the side of the side magnetic guide plate close to the magnetic gap. Multi-stage settings.
  • the housing is ring-shaped, the number of the side magnetic conductive plates is multiple, and the plurality of side magnetic conductive plates are arranged at intervals along the circumferential direction of the housing, and at least two of the side magnetic conductive plates are arranged oppositely.
  • the side magnetic conductive plate is provided with the bending part.
  • the housing is a plastic part, and the housing and the side magnetic guide plate are injection molded into one body.
  • the present invention also provides an electronic device, including a sounding device, the sounding device includes a housing, a magnetic circuit system and a vibration system, the magnetic circuit system is provided in the housing, and includes a side magnet, and is provided on the upper end of the side magnet
  • the side magnetic guide plate, the inner side of the side magnet is formed with a magnetic gap
  • the vibration system includes a diaphragm connected to the housing, and a voice coil provided on the diaphragm, the voice coil at least partially extends into In the magnetic gap, a side of the side magnetic guide plate close to the magnetic gap is provided with a bending portion, and the bending portion is at least partially bent in the direction of the diaphragm.
  • a bending part is provided on the inner edge of the side magnetic guide plate close to the voice coil.
  • the bent part is bent in the direction of the diaphragm, it is equivalent to increasing the thickness of the inner side edge of the side magnetic guide plate.
  • the size of the bent portion is less restricted by the side magnetic conductive plate. Even when the side magnetic conductive plate is thin, the size of the bent portion can be bent in the direction of the diaphragm by extending the bending portion.
  • the thickness of the side magnetic guide plate can be reduced as much as possible to avoid the situation that the side magnetic guide plate is too thick and the vibration space of the diaphragm becomes smaller. This can increase the thickness of the inner side edge of the side magnetic guide plate and improve the force.
  • the coefficient (BL value) can effectively improve the magnetic permeability, and can also better ensure that the diaphragm has enough vibration space, which can improve the acoustic performance of the sound device.
  • Fig. 1 is a schematic structural diagram of an embodiment of a sound generating device of the present invention
  • Figure 2 is an enlarged view of A in Figure 1;
  • Fig. 3 is a schematic structural diagram of another embodiment of a sound generating device of the present invention.
  • Figure 4 is an enlarged view of B in Figure 3;
  • Fig. 5 is a structural diagram of a housing in still another embodiment of the sound generating device of the present invention.
  • Figure 6 is an enlarged view of C in Figure 5;
  • Fig. 7 is a cut-away schematic view of the housing in Fig. 5;
  • Fig. 8 is an enlarged view at D in Fig. 7;
  • Fig. 9 is another schematic cross-sectional view of the housing in Fig. 5;
  • Fig. 10 is an enlarged view of E in Fig. 9.
  • the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.
  • the present invention provides a sound emitting device, which is used in an electronic device, where the electronic device may be a device capable of sounding, such as a mobile phone, a tablet computer, or a headset.
  • the sound generating device includes a housing 10, a magnetic circuit system 30, and a vibration system 20.
  • the magnetic circuit system 30 is provided on the housing 10 and includes side magnets 33 and The side magnetic plate 35 at the upper end of the side magnet 33 has a magnetic gap 34 formed inside the side magnet 33.
  • the vibration system 20 includes a diaphragm 21 connected to the housing 10 and a voice coil 22 provided on the diaphragm 21.
  • the voice coil 22 is at least Part of it extends into the magnetic gap 34, a side of the side magnetic guide plate 35 close to the magnetic gap 34 is provided with a bending portion 351, and the bending portion 351 is at least partially bent in the direction of the diaphragm 21.
  • the magnetic circuit system 30 includes a magnetically conductive yoke 31.
  • the magnetically conductive yoke 31 is provided with an inner magnetic circuit system 32 and an outer magnetic circuit system.
  • the inner magnetic circuit system 32 and the outer magnetic circuit system form an accommodation sound between the inner magnetic circuit system 32 and the outer magnetic circuit system.
  • the outer magnetic circuit system includes a side magnet 33, which is located on the magnetic yoke 31, a magnetic gap 34 for accommodating the voice coil 22 is formed between the inner side of the side magnet 33 and the inner magnetic circuit system 32, and the side magnetic guide plate 35 is located on the surface of the side magnet 33 facing away from the magnetic yoke 31.
  • the bent portion 351 is formed by bending the side of the side magnetic guide plate 35 close to the magnetic gap 34, that is, the bent portion 351 and the side magnetic guide plate 35 are integrally provided.
  • the bent portion 351 may extend along the inner edge of the side magnetic guide plate 35 in a long strip shape, or the number of the bent portion 351 may be set to be multiple, and the multiple bent portions 351 are arranged at intervals along the circumferential direction.
  • the bent portion 351 may be bent in an "L" shape relative to the side magnetic conductive plate 35, or the bent portion 351 and the side magnetic conductive plate 35 may be inclined at an acute angle, or the bent portion 351 may first face the diaphragm 21.
  • the housing 10 may be square, circular, oval, or racetrack-shaped, polygonal, or the like.
  • a bent portion 351 is provided on the inner edge of the side magnetic conductive plate 35 close to the voice coil 22.
  • the bent portion 351 is bent in the direction of the diaphragm 21, it is equivalent to increasing the side magnetic conductive plate.
  • the thickness of the inner edge of 35, and the size of the bent portion 351 is less restricted by the side magnetic conductive plate 35.
  • the bending portion 351 can be extended toward the diaphragm 21.
  • the size of the direction bend.
  • the thickness of the side magnetic guide plate 35 can be reduced as much as possible to avoid the situation that the side magnetic guide plate 35 is too thick and the vibration space of the diaphragm 21 becomes smaller.
  • the thickness and lifting force coefficient can effectively improve the magnetic permeability, and can better ensure that the diaphragm 21 has enough vibration space, and can improve the acoustic performance of the sound device.
  • the bending portion 351 includes a first bending section 3511, and the first bending section 3511 is connected to the side magnetic conductive plate 35 and extends in the direction of the diaphragm 21.
  • the first bending section 3511 is bent and arranged approximately in an "L" shape, and the first bending section 3511 is arranged parallel to or nearly parallel to the outer peripheral surface of the voice coil 22, so that the first bending section 3511 and the voice coil
  • the gap between 22 is relatively uniform, which can also make the area of the first bending section 3511 facing the voice coil 22 larger.
  • the bending height of the first bending section 3511 can be made larger, that is, the height of the first bending section 3511 along the thickness direction of the side magnetic guide plate 35, which can further increase the inner side of the side magnetic guide plate 35 to a large extent.
  • the thickness of the edge can further improve the magnetic permeability.
  • the bent portion 351 formed by bending in this way has a simple structure, which can reduce the processing steps and improve the production efficiency of the sound generating device.
  • the bending portion 351 further includes a second bending section 3512 connected to the first bending section 3511, and the second bending section 3511 3512 extends from the first bending section 3511 in a direction away from the voice coil 22.
  • the second bending section 3512 extends along the arrangement direction of the voice coil 22 and the housing 10, that is, the first bending section 3511 is first bent in the direction of the diaphragm 21, and then the first bending section 3511 is bent in the direction of the diaphragm 21.
  • the free end of the segment 3511 away from the side magnetic conductive plate 35 is bent in a direction away from the voice coil 22 to form a second bending section 3512 extending in a direction away from the voice coil 22, which is equivalent to increasing the bending portion 351
  • the width of the bending portion 351 can be increased, which is equivalent to increasing the area of the thickened area of the side magnetic conductive plate 35, which can further increase the force coefficient (BL value), and further effectively improve the conduction Magnetic properties.
  • the second bending section 3512 may be arranged in an arc shape, or may be arranged in a straight section.
  • the shape of the bending portion 351 can be set according to actual conditions.
  • the plurality of bending portions 351 may all include only the first portion.
  • the bending section 3511 is provided, that is, the bending portion 351 is generally arranged in an "L" shape.
  • the plurality of bending portions 351 may include the first bending section 3511 and the second bending section 3512.
  • a part of the bent portion 351 is generally arranged in an "L" shape, and the part of the bent portion 351 is arranged in a structure including a first bending section 3511 and a second bending section 3512, and so on.
  • the first bending section 3511 will also be deformed, and after the second bending section 3512 is formed, the surface of the first bending section 3511 facing the voice coil 22 will be deformed It is curved, which will cause the gap between the first bending section 3511 and the voice coil 22 to be an uneven gap that first decreases and then increases in the direction toward the diaphragm 21. Therefore, in one embodiment, the gap between the first bending section 3511 and the voice coil 22 The bending section 3511 is trimmed so that the surface of the first bending section 3511 facing the voice coil 22 is arranged in a straight surface.
  • the flat surface of the first bending section 3511 is arranged parallel or nearly parallel to the outer peripheral surface of the voice coil 22, so that the gap between the first bending section 3511 and the voice coil 22 is relatively uniform, and it can also make the first bending section 3511 and the voice coil 22 more uniform.
  • the 3511 has a large surface area facing the voice coil 22 in parallel or close to parallel, which can improve the magnetic permeability effect and effectively improve the magnetic permeability performance.
  • the second bending section 3512 is disposed in contact with the surface of the side magnetic guide plate 35. Specifically, after bending to form the second bending section 3512, the second bending section 3512 is pressed onto the surface of the side magnetic conductive plate 35 facing the diaphragm 21, so that the second bending section 3512 is attached to the diaphragm 21.
  • the edge-bonding magnetic conductive plate 35 is provided. Since the side magnetic conductive plate 35 and the second bending section 3512 and other physical structures play the role of magnetic permeability, when the second bending section 3512 is pressed onto the side magnetic conductive plate 35, the second bending section can be reduced.
  • the gap between 3512 and the side magnetic guide plate 35 makes the structure of the side magnetic guide plate 35 more compact, can increase the distance between the second bending section 3512 and the diaphragm 21, and increase the vibration space of the diaphragm 21 .
  • the side magnetic conductive plate 35 and the bent portion 351 are electroplated to effectively protect the side magnetic conductive plate 35 and the bent portion 351. After pressing the second bending section 3512 on the side magnetic conductive plate 35, the gap between the second bending section 3512 and the side magnetic conductive plate 35 can be filled by electroplating, so that the second bending The section 3512 is integrally formed with the outer surface of the side magnetic guide plate 35, which improves the protection effect.
  • the side magnetic guide plate 35 has various structures.
  • the housing 10 has a ring shape, and the side magnetic guide plate 35 extends in the circumferential direction of the housing 10 in a ring shape. And surround the voice coil 22 set.
  • the inner edge of the side magnetic conductive plate 35 is ring-shaped, and the entire inner edge of the side magnetic conductive plate 35 is bent in the direction of the diaphragm 21 into a ring shape, that is, the bent portion 351 is also along the edge of the side magnetic conductive plate 35.
  • the circumferential extension is in a ring shape, which is equivalent to thickening the inner edges of the side magnetic conductive plates 35, which can increase the magnetic conductive area of the side magnetic conductive plates 35, which is beneficial to improve the magnetic permeability and the acoustics of the sound device. performance.
  • the side magnetic conductive plate 35 and the side magnet 33 can be better matched to ensure the magnetic permeability.
  • the shape of the side magnetic guide plate 35 can be adapted to the shape of the housing 10. For example, when the housing 10 is a rectangular ring, the side magnetic guide plate 35 is a rectangular ring, and when the housing 10 is circular, the side magnetic guide plate 35 is also It has a circular ring shape.
  • the side magnetic conductive plate 35 may be a circular ring or the like.
  • a plurality of bent portions 351 may also be provided on the side magnetic guide plate 35, and the plurality of bent portions 351 are arranged at intervals along the circumferential direction of the side magnetic guide plate 35.
  • the side magnetic guide plate 35 is provided with a plurality of avoiding notches 352 on the side close to the magnetic gap 34, and the plurality of avoiding notches 352 divide the side of the side magnetic conductive plate 35 close to the magnetic gap 34 into multiple sections.
  • the side magnetic conductive plate 35 includes a magnetic conductive portion 353 and a connecting portion 354.
  • the magnetic conductive portion 353 has a ring shape.
  • the connecting portion 354 surrounds the outer periphery of the magnetic conductive portion 353, and the magnetic conductive portion 353 and the connecting portion 354 are integrated. Set up.
  • the bent portion 351 is provided on the inner periphery of the magnetic conductive portion 353, the avoidance notch 352 is provided on the magnetic conductive portion 353, and the magnetic conductive portion 353 is divided into multiple sections by the avoidance notches 352, which is equivalent to the multiple magnetic conductive portions 353 along the connecting portion.
  • 354 are arranged at intervals in the circumferential direction, and each magnetic conductive portion 353 is provided with a bent portion 351.
  • the avoidance gap 352 can be used to avoid the voice coil lead of the voice coil 22 (not shown in the figure), which can provide sufficient avoidance space for the lead of the voice coil, and prevent the vibration of the voice coil lead from hitting the side magnetization plate 35 and affecting the sound production. The sound quality of the device.
  • the bending parts 351 on any two adjacent magnetic conductive parts 353 are also arranged independently of each other. Compared with the formed ring-shaped bending part 351, this can reduce the bending
  • the forming area of the bent portion 351 can facilitate the bending and forming of the bent portion 351.
  • the number of avoidance gaps 352 can be two, three, four, and so on.
  • avoidance notches 352 can be provided at the corners of two adjacent sides.
  • a plurality of avoidance notches 352 can be evenly distributed.
  • the bending portion 351 may be provided on only one of the opposite magnetic conductive portions 353.
  • the number of side magnetic guide plates 35 is multiple, the plurality of side magnetic guide plates 35 are arranged at intervals along the circumferential direction of the housing 10, and at least two oppositely arranged side magnetic guide plates 35 are provided with bending ⁇ 351.
  • a plurality of side magnetic conductive plates 35 are respectively provided independently, and each side magnetic conductive plate 35 is connected to the inner peripheral surface of the housing 10.
  • the bent portions 351 may be provided on only two of the side magnetic conductive plates 35 that are arranged opposite to each other, or the bent portions 351 may be provided on each side of the magnetic conductive plates 35.
  • the multiple side magnetic conductive plates 35 are separately arranged independently, and then it is convenient to set the bending portion 351 on one or more of the side magnetic conductive plates, and also make multiple bending portions They are also arranged independently of each other, which can facilitate the bending and forming of the bending portion 351, and also facilitate the setting of the bending portion 351 of various structures.
  • the two oppositely arranged side magnetic conductive plates 35 are provided with only the first The bending section 351 in the form of a bending section 3511, and the other two oppositely arranged side magnetic conductive plates 35 are provided with a bending section 351 in the form of a first bending section 3511 and a second bending section 3512, which can be easily adapted to the sound device
  • the structure is adapted to the settings.
  • it can also facilitate the lead of the voice coil lead from the gap between the two adjacent magnetic conductive plates 35, and can also provide sufficient avoidance space for the lead of the voice coil to prevent the vibration of the voice coil lead from hitting the side magnetic conductive plate 35, affecting The sound quality of the sounding device.
  • the number of side magnetic guide plates 35 can be two, three, four, and so on.
  • the housing 10 is a plastic part, and the housing 10 and the side magnetic guide plate 35 are integrally molded by injection molding.
  • the side magnetic guide plate 35 is used as an insert to be integrated with the housing 10 by injection molding, wherein the side magnetic guide plate 35 can be integrally injection molded with the housing 10 in a ring shape, or a plurality of side magnetic guide plates 35 can be provided.
  • the side magnetic conductive plate 35 is integrally injection-molded with the housing 10 along the circumference of the housing 10. Compared with the separate installation of the housing 10 and the side magnetic guide plate 35, the integrated molding is formed at one time through the mold in the manner of separate installation, eliminating the need for subsequent assembly procedures, simplifies the installation procedure of the sound device, and can improve production effectiveness.
  • the side magnetic conductive plate 35 is made of metal, which has high strength and can also improve the overall strength of the housing 10.
  • the housing 10 can also be a metal piece, and the housing 10 can be integrally formed with the side magnetic conductive plate 35, or the housing 10 and the side magnetic conductive plate 35 can be welded and so on.
  • the present invention also provides an electronic device that includes an equipment main body and a sounding device.
  • the specific structure of the sounding 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 above-mentioned implementations. All the beneficial effects brought by the technical solutions of the example will not be repeated here.
  • the sounding device is arranged on the main body of the device.
  • the electronic device may be a device capable of producing sound, such as a mobile phone, a tablet computer, or a headset.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)

Abstract

本发明公开一种发声装置和电子设备，该发声装置包括外壳、磁路系统和振动系统，磁路系统设于所述外壳，并包括边磁体、及设于所述边磁体上端的边导磁板，所述边磁体的内侧形成有磁间隙，振动系统包括与所述外壳连接的振膜、及设于所述振膜的音圈，所述音圈至少部分伸入所述磁间隙，所述边导磁板的靠近所述磁间隙的一侧设有折弯部，所述折弯部至少部分朝所述振膜的方向弯折。本发明技术方案能够在增加边导磁板的靠近音圈的部分厚度时，不影响振膜的振动空间。

Description

发声装置和电子设备 技术领域
本发明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
在一些扬声器产品中，为充分利用腔体空间，同时提升力系数(BL值)，会将边导磁板的靠近磁隙的一侧加厚设置。而目前加厚的方式是采用较厚的边导磁板，再将边导磁板的对应振膜折环的部分压薄，以使边导磁板靠近磁隙的部分具有原有的厚度，而对应振膜折环的部分呈凹槽设置，以给振膜的振动提供空间。但是上述这种采用厚边导磁板局部压薄的方式中，受制于材料性能和现有压薄工艺的限制，压薄的部分压薄量较小，无法达到需求深度，而较厚的边导磁板会导致振膜的振动空间变小，进而导致发声装置的出音效果差。
发明内容
本发明的主要目的是提出一种发声装置，旨在增加边导磁板的靠近音圈的部分厚度时，不影响振膜的振动空间。
为实现上述目的，本发明提出的发声装置，包括：
外壳；
磁路系统，设于所述外壳，并包括边磁体、及设于所述边磁体上端的边导磁板，所述边磁体的内侧形成有磁间隙；以及，
振动系统，包括与所述外壳连接的振膜、及设于所述振膜的音圈，所述音圈至少部分伸入所述磁间隙；
所述边导磁板的靠近所述磁间隙的一侧设有折弯部，所述折弯部至少部分朝所述振膜的方向弯折。
可选地，所述折弯部包括第一弯折段，所述第一弯折段连接于所述边导磁板，并朝所述振膜的方向延伸。
可选地，所述折弯部还包括连接于所述第一弯折段的第二弯折段，所述第二弯折段自所述第一弯折段朝背离所述音圈的方向延伸。
可选地，所述第一弯折段面向所述音圈的表面呈平直面设置。
可选地，所述第二弯折段贴合所述边导磁板的表面设置。
可选地，所述外壳呈环状，所述边导磁板沿所述外壳的周向延伸呈环状，并环绕所述音圈设置。
可选地，所述边导磁板的靠近所述磁间隙的一侧设有多个避让缺口，多个所述避让缺口将所述边导磁板的靠近所述磁间隙的一侧分隔呈多段设置。
可选地，所述外壳呈环状，所述边导磁板的数量为多个，多个所述边导磁板沿所述外壳的周向间隔排布，至少两个相对设置的所述边导磁板上设有所述折弯部。
可选地，所述外壳为塑料件，所述外壳与所述边导磁板注塑为一体。
本发明还提出一种电子设备，包括发声装置，该发声装置包括外壳、磁路系统和振动系统，所述磁路系统设于所述外壳，并包括边磁体、及设于所述边磁体上端的边导磁板，所述边磁体的内侧形成有磁间隙，所述振动系统包括与所述外壳连接的振膜、及设于所述振膜的音圈，所述音圈至少部分伸入所述磁间隙，所述边导磁板的靠近所述磁间隙的一侧设有折弯部，所述折弯部至少部分朝所述振膜的方向弯折。
本发明技术方案通过在边导磁板的靠近音圈的内侧缘设有折弯部，在折弯部朝振膜的方向弯折时，相当于增大了边导磁板的内侧缘的厚度，而且折弯部的尺寸受边导磁板的限制较小，即使在边导磁板较薄的情况下，也可以通过延长折弯部朝振膜方向弯折的尺寸。进而可以尽可能地减小边导磁板的厚度，避免边导磁板过厚而导致振膜的振动空间变小的情况，如此既能够增大边导磁板的内侧缘的厚度，提升力系数(BL值)，有效改善导磁性能，也能较好地保证振膜具有足够的振动空间，能够提高发声装置的声学性能。
附图说明
为了更清楚地说明本发明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发明的一些实施例，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为本发明发声装置一实施例的结构示意图；
图2为图1中A处的放大图；
图3为本发明发声装置另一实施例的结构示意图；
图4为图3中B处的放大图；
图5为本发明发声装置再一实施例中外壳的结构示意图；
图6为图5中C处的放大图；
图7为图5中外壳的剖切示意图；
图8为图7中D处的放大图；
图9为图5中外壳的另一剖切示意图；
图10为图9中E处的放大图。
附图标号说明：
标号 名称 标号 名称
10 外壳 34 磁间隙
20 振动系统 35 边导磁板
21 振膜 351 折弯部
22 音圈 3511 第一弯折段
30 磁路系统 3512 第二弯折段
31 导磁轭 352 避让缺口
32 内磁路系统 353 导磁部
33 边磁体 354 连接部
本发明目的的实现、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
下面将结合本发明实施例中的附图，对本发明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发明的一部分实施例， 而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。
需要说明，若本发明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，若本发明实施例中有涉及“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，也不在本发明要求的保护范围之内。
本发明提出一种发声装置，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。
在本发明实施例中，请结合参考图1至图4，该发声装置包括外壳10、磁路系统30和振动系统20，磁路系统30设于外壳10，并包括边磁体33、及设于边磁体33上端的边导磁板35，边磁体33的内侧形成有磁间隙34，振动系统20包括与外壳10连接的振膜21、及设于振膜21的音圈22，音圈22至少部分伸入磁间隙34，边导磁板35的靠近磁间隙34的一侧设有折弯部351，折弯部351至少部分朝振膜21的方向弯折。
一实施例中，磁路系统30包括导磁轭31，导磁轭31上设有内磁路系统32和外磁路系统，内磁路系统32和外磁路系统两者之间形成容纳音圈22的磁间隙34。其中，外磁路系统包括边磁体33，边磁体33位于导磁轭31上，边磁体33的内侧与内磁路系统32两者之间形成容纳音圈22的磁间隙34，边导磁板35位于边磁体33的背离导磁轭31的表面。折弯部351为边导磁板35的靠近磁间隙34的一侧弯折而形成，即折弯部351与边导磁板35为一体设置。其中，折弯部351可以沿边导磁板35的内侧缘延伸呈长条状，也可以将 折弯部351的数量设置为多个，多个折弯部351沿周向间隔排布。此外，折弯部351可以相对边导磁板35呈“L”形弯折，或者折弯部351与边导磁板35之间呈锐角倾斜设置，或者折弯部351先朝振膜21的方向弯折，再朝边导磁板35的方向弯折，或者折弯部351呈重叠弯折设置等等。另外，外壳10可以呈方形，也可以呈圆形或椭圆形或跑道形，还可以呈多边形等等。
本发明技术方案通过在边导磁板35的靠近音圈22的内侧缘设有折弯部351，在折弯部351朝振膜21的方向弯折时，相当于增大了边导磁板35的内侧缘的厚度，而且折弯部351的尺寸受边导磁板35的限制较小，即使在边导磁板35较薄的情况下，也可以通过延长折弯部351朝振膜21方向弯折的尺寸。进而可以尽可能地减小边导磁板35的厚度，避免边导磁板35过厚而导致振膜21的振动空间变小的情况，如此既能够增大边导磁板35的内侧缘的厚度，提升力系数(BL值)，有效改善导磁性能，也能较好地保证振膜21具有足够的振动空间，能够提高发声装置的声学性能。
请结合参考图5至图8，一实施例中，折弯部351包括第一弯折段3511，第一弯折段3511连接于边导磁板35，并朝振膜21的方向延伸。具体而言，第一弯折段3511大致呈“L”形弯折设置，第一弯折段3511与音圈22的外周面平行或接近平行设置，以使得第一弯折段3511与音圈22之间的间隙较为均匀，也能使得第一弯折段3511面向音圈22的面积较大。此外，还能使得第一弯折段3511的弯折高度较大，即第一弯折段3511沿边导磁板35的厚度方向的高度，进而可以较大程度地增大边导磁板35内侧缘的厚度，能够进一步改善导磁性能。而且如此弯折形成的折弯部351结构简单，能够减少加工工序，提高发声装置的生产效率。
此外，为进一步提高导磁性能，请结合参考图9和图10，一实施例中，折弯部351还包括连接于第一弯折段3511的第二弯折段3512，第二弯折段3512自第一弯折段3511朝背离音圈22的方向延伸。具体而言，第二弯折段3512沿音圈22和外壳10的排布方向延伸，也就是说，先将第一弯折段3511朝振膜21的方向弯折，再将第一弯折段3511的远离边导磁板35的自由端朝背离音圈22的方向弯折，以形成朝背离音圈22的方向延伸的第二弯折段3512，如此相当于增大了折弯部351沿音圈22和外壳10的排布方向的宽度。可以理解，当第一弯折段3511朝振膜21的方向弯折时，第一弯折段3511的 宽度与边导磁板35的厚度接近，而边导磁板35的厚度较薄时，第一弯折段3511的宽度的也相应较小。而通过设置第二弯折段3512，能够增大折弯部351的宽度，相当于增大边导磁板35的增厚区域的面积，能够进一步提升力系数(BL值)，进一步有效改善导磁性能。其中，第二弯折段3512可以呈弧形设置，也可以呈平直段设置。
另外，折弯部351的形状可以根据实际情况进行设置，例如，在设置多个沿外壳10的周向间隔排布的折弯部351时，可以将多个折弯部351均仅包括第一弯折段3511设置，即折弯部351大致呈“L”形设置。或者将多个折弯部351均包括第一弯折段3511和第二弯折段3512设置。或者其中部分折弯部351大致呈“L”形设置，部分折弯部351呈包括第一弯折段3511和第二弯折段3512的结构设置等等。
在弯折形成第二弯折段3512的过程中，第一弯折段3511也会发生变形，进而在第二弯折段3512成型后，第一弯折段3511面向音圈22的表面会变形呈弧面，如此会导致第一弯折段3511与音圈22之间的间隙在朝向振膜21的方向呈先减小后增大的不均匀间隙，故而在一实施例中，对第一弯折段3511进行修整，以使得第一弯折段3511的面向音圈22的表面呈平直面设置。第一弯折段3511的该平直面与音圈22的外周面平行或接近平行设置，以使得第一弯折段3511与音圈22之间的间隙较为均匀，也能使得第一弯折段3511平行或接近平行面向音圈22的表面面积较大，能够提高导磁效果，能有效改善导磁性能。
另外，一实施例中，第二弯折段3512贴合边导磁板35的表面设置。具体而言，在弯折形成第二弯折段3512之后，再将第二弯折段3512压合在边导磁板35的面向振膜21的表面上，以使第二弯折段3512贴合边导磁板35设置。由于起导磁作用的是边导磁板35和第二弯折段3512等实体结构，故而将第二弯折段3512压合在边导磁板35上时，能够减小第二弯折段3512与边导磁板35之间的间隙，使得边导磁板35的结构更紧凑，能够增大第二弯折段3512与振膜21之间的距离，增大了振膜21的振动空间。而且在一些实施例中，会对边导磁板35和折弯部351进行电镀处理，以对边导磁板35和折弯部351进行有效保护。而将第二弯折段3512压合贴在边导磁板35上后，通过电镀能够将第二弯折段3512和边导磁板35之间的缝隙处进行填充处理， 使得第二弯折段3512与边导磁板35的外表面形成整体，提高了保护效果。
请再次结合参考图5和图6，边导磁板35的结构具有多种，例如，一实施例中，外壳10呈环状，边导磁板35沿外壳10的周向延伸呈环状，并环绕音圈22设置。具体而言，边导磁板35的内侧缘呈环状，且边导磁板35的内侧缘整体朝振膜21的方向弯折呈环状，即折弯部351也沿边导磁板35的周向延伸呈环状，如此相当于使得边导磁板35的内侧缘都呈加厚设置，能够提高边导磁板35的导磁面积，有利于提升导磁性能，以及提高发声装置的声学性能。而且在边磁体33呈环状时，也能使得边导磁板35与边磁体33更好的配合，以保证导磁性能。其中，边导磁板35的形状可以与外壳10的形状相适配，例如外壳10呈矩形环时，边导磁板35呈矩形环，外壳10呈圆环形时，边导磁板35也呈圆环形。当然，也可以在外壳10呈矩形环时，边导磁板35呈圆环形等等。另外，在其它实施例中，也可以在边导磁板35上设有多个折弯部351，多个折弯部351沿边导磁板35的周向间隔排布。
其中，一实施例中，边导磁板35的靠近磁间隙34的一侧设有多个避让缺口352，多个避让缺口352将边导磁板35的靠近磁间隙34的一侧分隔呈多段设置。具体而言，边导磁板35包括导磁部353和连接部354，导磁部353呈环状，连接部354环绕在导磁部353的外周缘，导磁部353与连接部354呈一体设置。折弯部351设置在导磁部353的内周缘，避让缺口352设置在导磁部353，多个将避让缺口352将导磁部353分隔呈多段设置，相当于多段导磁部353沿连接部354的周向间隔排布，每一导磁部353设有一折弯部351。通过设置避让缺口352可以用于避让音圈22的音圈引线(图未示出)，能够为音圈引线的引出提供充足的避让空间，防止音圈引线振动打击边导磁板35，影响发声装置的音质。此外，由于多段导磁部353分别独立设置，任意相邻两导磁部353上的折弯部351之间也相互独立设置，相较于成型环状的折弯部351，如此能够减小折弯部351的成型面积，能够方便弯折成型折弯部351。其中，避让缺口352的数量可以为两个、三个或四个等等。另外，边导磁板35呈矩形环状时，可以在两相邻边的夹角处设置避让缺口352，边导磁板35呈圆环状时，可以将多个避让缺口352均匀分布。当然，在其它实施例中，也可以仅在其中一相对的导磁部353上设有折弯部351。
另一实施例中，边导磁板35的数量为多个，多个边导磁板35沿外壳10 的周向间隔排布，至少两个相对设置的边导磁板35上设有折弯部351。具体而言，多个边导磁板35分别独立设置，每一个边导磁板35均与外壳10的内周面连接。可以仅在其中两个呈相对设置的边导磁板35上设有折弯部351，也可以在每一边导磁板35上均设有折弯部351。通过设置多个边导磁板35，使得多个边导磁板35分别独立设置，进而可以方便在其中一个或多个边导磁板上设置折弯部351，并也使得多个折弯部之间也相互独立设置，能够方便弯折成型折弯部351，而且还能方便设置多种结构的折弯部351，例如在其中两个相对设置的边导磁板35设有仅为第一弯折段3511形式的折弯部351，另外两个相对设置的边导磁板35设有包括第一弯折段3511和第二弯折段3512形式的折弯部351，能够方便适应发声装置的结构进行适应设置。另外，还能方便将音圈引线从相邻两边导磁板35之间的间隙引出，也能够为音圈引线的引出提供充足的避让空间，防止音圈引线振动打击边导磁板35，影响发声装置的音质。其中，边导磁板35的数量可以为两个、三个或四个等等。
一实施例中，外壳10为塑料件，外壳10与边导磁板35一体注塑成型。具体而言，边导磁板35作为嵌件与外壳10注塑为一体，其中，边导磁板35可以呈环状与外壳10一体注塑成型，也可以设置多个边导磁板35，多个边导磁板35沿外壳10的周向与外壳10一体注塑成型。相较于将外壳10与边导磁板35分体设置，在分别安装的方式，一体成型的方式通过模具一次成型，免去了后续组装工序，简化了的发声装置的安装程序，能够提高生产效率。而且边导磁板35为金属，强度高，还能提高外壳10的整体强度。当然，在其它实施例中，外壳10也可以为金属件，而外壳10可以与边导磁板35一体成型，也可以将外壳10与边导磁板35焊接等等。
本发明还提出一种电子设备，该电子设备包括设备主体和发声装置，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。其中，发声装置设置在设备主体上。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。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明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发明的专利保护范围内。

Claims (10)

  1. 一种发声装置，其特征在于，包括：
    外壳；
    磁路系统，设于所述外壳，并包括边磁体、及设于所述边磁体上端的边导磁板，所述边磁体的内侧形成有磁间隙；以及，
    振动系统，包括与所述外壳连接的振膜、及设于所述振膜的音圈，所述音圈至少部分伸入所述磁间隙；
    所述边导磁板的靠近所述磁间隙的一侧设有折弯部，所述折弯部至少部分朝所述振膜的方向弯折。
  2. 如权利要求1所述的发声装置，其特征在于，所述折弯部包括第一弯折段，所述第一弯折段连接于所述边导磁板，并朝所述振膜的方向延伸。
  3. 如权利要求2所述的发声装置，其特征在于，所述折弯部还包括连接于所述第一弯折段的第二弯折段，所述第二弯折段自所述第一弯折段朝背离所述音圈的方向延伸。
  4. 如权利要求3所述的发声装置，其特征在于，所述第一弯折段面向所述音圈的表面呈平直面设置。
  5. 如权利要求3所述的发声装置，其特征在于，所述第二弯折段贴合所述边导磁板的表面设置。
  6. 如权利要求1至5任意一项所述的发声装置，其特征在于，所述外壳呈环状，所述边导磁板沿所述外壳的周向延伸呈环状，并环绕所述音圈设置。
  7. 如权利要求6所述的发声装置，其特征在于，所述边导磁板的靠近所述磁间隙的一侧设有多个避让缺口，多个所述避让缺口将所述边导磁板的靠近所述磁间隙的一侧分隔呈多段设置。
  8. 如权利要求1至5任意一项所述的发声装置，其特征在于，所述外壳呈环状，所述边导磁板的数量为多个，多个所述边导磁板沿所述外壳的周向间隔排布，至少两个相对设置的所述边导磁板上设有所述折弯部。
  9. 如权利要求1所述的发声装置，其特征在于，所述外壳为塑料件，所述外壳与所述边导磁板注塑为一体。
  10. 一种电子设备，其特征在于，包括如权利要求1至9任意一项所述的发声装置。
PCT/CN2020/129014 2019-12-13 2020-11-16 发声装置和电子设备 WO2021115031A1 (zh)

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