WO2021237838A1 - Dispositif de génération de son - Google Patents

Dispositif de génération de son Download PDF

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Publication number
WO2021237838A1
WO2021237838A1 PCT/CN2020/097139 CN2020097139W WO2021237838A1 WO 2021237838 A1 WO2021237838 A1 WO 2021237838A1 CN 2020097139 W CN2020097139 W CN 2020097139W WO 2021237838 A1 WO2021237838 A1 WO 2021237838A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
cover plate
yoke
extension wall
yoke body
Prior art date
Application number
PCT/CN2020/097139
Other languages
English (en)
Chinese (zh)
Inventor
曹成铭
沈凯华
吴立峰
吴树文
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021237838A1 publication Critical patent/WO2021237838A1/fr

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Classifications

    • 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
    • H04R1/20—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; DEAF-AID SETS; 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; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

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 generating device, which includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and produce sound.
  • the vibration system includes a diaphragm
  • the magnetic circuit system includes a vibration A yoke opposite to the diaphragm and a magnetic steel fixed to the yoke;
  • the yoke includes a yoke body opposite to the diaphragm, a leakage part penetrating the yoke body, and a magnetic steel fixed to the yoke.
  • a ring-shaped extension wall that is bent and extended in a direction away from the diaphragm, and an orthographic projection of the extension wall to the yoke body along the vibration direction of the diaphragm is located on the periphery of the magnetic steel;
  • the sound generating device further includes a cover plate fixed to an end of the extension wall away from the yoke body, the cover plate, the extension wall and the yoke body jointly enclose a closed back cavity, and the leakage portion It is in communication with the rear cavity; the yoke or the cover plate is also provided with a leakage hole penetrating therethrough, and the leakage hole connects the rear cavity with the outside.
  • the extension wall is formed by bending and extending the outer peripheral edge of the yoke body.
  • the yoke body has a rectangular structure
  • the extension wall includes two first walls respectively located on opposite sides of the long axis of the yoke body, and two first walls respectively located on opposite sides of the short axis of the yoke body.
  • the leakage portion includes two and is respectively located on opposite sides of the yoke body.
  • the extension wall and the cover plate are both made of metal materials.
  • the extension wall or the cover plate 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 extension wall and the cover plate, and the other end of the conductive member is used for grounding.
  • the conductive member is formed by extending at least one of the extension wall and the cover plate.
  • the sound generating device further includes a conductive member, the conductive member includes two electrical pathways, one of the electrical pathways is used to connect the vibration system with an external electrical signal, and the other electrical pathway For grounding at least one of the extension wall and the cover plate.
  • 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 extension wall or the cover plate, and the positioning pieces are provided with penetrating through them.
  • the positioning piece is formed by the extension wall or the cover plate extending away from the sound generating device.
  • the sound emitting device includes a basin frame, the diaphragm and the magnetic circuit system are respectively fixed to the basin frame, and the sound emitting device further includes a cover provided on a side of the basin frame close to the diaphragm
  • the front cover and the diaphragm enclose a front sound cavity
  • the front cover is provided with a through hole penetrating the front sound cavity along the vibration direction, and the through hole connects the front sound 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 is further provided with a sound-guiding shell on a side close to the diaphragm, the sound-guiding shell has a sound-guiding cavity forming a side sound-emitting structure, and the sound-guiding cavity is in communication with the diaphragm.
  • the sound emitting device further includes a gas-permeable spacer located in the rear cavity, and the gas-permeable spacer comprises a spacer body arranged opposite to the cover plate at intervals, and is directed from the periphery of the spacer body to the The spacer extension part bent and extended in the direction of the cover 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 is spaced apart from the extension wall, The spacer fixing part is fixed to the cover plate; the air-permeable spacer and the cover plate jointly enclose a powder filling space.
  • the gas-permeable spacer comprises a spacer body arranged opposite to the cover plate at intervals, and is directed from the periphery of the spacer body to the The spacer extension part bent and extended in the direction of the cover 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 is spaced apart from the extension wall, The spacer fixing
  • the 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 is designed as a yoke body fixed to the basin frame and an extension wall extending from the yoke body in a direction away from the vibration system, so that the yoke forms a half
  • the cavity structure is further covered by a cover plate at the end of the extension wall away from the yoke body, so that the yoke body, the extension wall and the cover plate jointly enclose a sealed back cavity, and the yoke body is provided with a connected back
  • the leaking part of the cavity, the sound emitting device is not only simple in structure and small in overall size increase, but also makes the acoustic effect of the sound emitting device, especially the low frequency acoustic effect better, and the sealed rear cavity structure makes the sound emitting device avoid the shell after being used in the mobile terminal The occurrence of vibration phenomenon 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 diagram of a three-dimensional structure 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. 3;
  • FIG. 7 is a schematic structural diagram of another embodiment in which a conductive member is added in FIG. 3;
  • FIG. 8 is an exploded schematic diagram of a part of the structure of the embodiment shown in FIG. 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 generating device 100, which includes a basin frame 1, a vibration system 2, a magnetic circuit system 3, and a cover plate 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 a sounding cavity 20.
  • 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 sounding device 100 can also omit the structure of the basin frame 1 and fix the diaphragm 21 directly to the magnetic circuit system 3 and jointly enclose the sounding cavity 20, which is also easy to understand.
  • 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 opposed to the diaphragm 21, a leakage portion 312 penetrating the yoke body 311, and the yoke body 311 is bent in a direction away from the diaphragm 21 An extending wall 313 having a ring shape is extended.
  • the orthographic projection of the extension wall 313 to the yoke body 311 along the vibration direction of the diaphragm 21 is located on the periphery of the magnetic steel 32.
  • the yoke body 311 is fixed to the basin 1.
  • the structure of the yoke 31 described above forms a half-cavity structure.
  • the extension wall 313 is formed by bending and extending the outer peripheral edge of the yoke body 311.
  • 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 extension wall 313 is formed by the outer periphery of the yoke body 311.
  • the extension wall 313 extends from the periphery of the yoke body 311.
  • the yoke body 311 has a rectangular structure
  • the extension wall 313 includes two first walls 3131 respectively located on opposite sides of the long axis of the yoke body 311, respectively located on the short axis of the yoke body 311
  • Two second walls 3132 on opposite sides and a connecting wall 3133 connecting the adjacent first wall 3131 and the second wall 3132.
  • the length of the first wall 3131 is smaller than the distance between the two second walls 3132
  • the length of the second wall 3132 is smaller than the distance between the two first walls 3131.
  • the connecting wall 3133 is located within the range enclosed by the extension line of the first wall 3131 and the extension line of the second wall 3132 connected to it, and can be a straight strip structure or a straight strip structure that has been bent multiple times. It is formed by folding, and the specific shape is not limited.
  • the purpose is to make the connecting wall 3133 and the first wall 3131 and the second wall 3132 connected to it together form a concession structure. So far, the half-cavity structure formed by the structure of the extension wall 313 increases the overall size of the sounding device 100 as small as possible, and the above-mentioned structure is arranged to form a concession structure design, which is convenient to form a concession to the installation position when used in a terminal. Effective use of space.
  • the yoke body 311 and the extension wall 313 are integrally formed to increase structural strength and stability.
  • the yoke body 311 and the extension wall 313 are made of magnetically conductive materials . It is also beneficial to increase the driving force of the magnetic circuit system 3 and improve the overall acoustic performance of the sound generating device 100.
  • the cover plate 4 is fixed to an end of the extension wall 313 away from the yoke body 311.
  • the cover plate 4, the extension wall 313, and the yoke body 311 jointly enclose a closed rear cavity 10, and the leakage portion 312 communicates with the rear cavity 10, that is, the leakage portion 312 transmits the sound
  • the inner cavity 20 is in communication with the back cavity 10, and the formation of the back cavity 10 effectively improves the acoustic performance of the sound emitting device 100, especially the low frequency acoustic performance.
  • At least one of the cover plate 4 and the extension wall 313 is provided with a leakage hole 40 for balancing the sound pressure in the rear cavity 10. This is easy to understand. In this embodiment, the leakage hole 40 is opened in the cover. Board 4.
  • the leakage portion 312 includes two and is located on opposite sides of the yoke body 311, respectively. This structure can effectively ensure that the airflow of the rear cavity 10 is smooth and stable when the vibration system 2 vibrates, and the sound production is improved. reliability.
  • the cover plate 4 is made of metal, ceramic or glass material, which is all feasible. In this embodiment, it is preferable that the cover plate 4 is made of a metal material.
  • the above-mentioned sound emitting device 100 of the present invention forms a closed rear cavity 10 structure, which is simple in structure. On the one hand, it improves the acoustic performance of the sound emitting device 100, especially the low-frequency acoustic performance, and on the other hand, due to the structure of the rear cavity 10 Existence, has a vibration absorbing effect, so that the sound-producing device 100 will not cause the mobile terminal and other electronic products to produce shell vibration after being used in electronic products such as mobile terminals, which effectively increases the user experience effect. Moreover, since the size of the rear cavity 10 along the vibration direction perpendicular to the vibration system 2 does not exceed the size of the sound emitting device 100 itself, it 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 generating device 100 is provided with a front cover 7 on the side close to the diaphragm 21.
  • the front cover 7 and the diaphragm 21 form a front acoustic cavity 103.
  • the setting of the front cover 7 effectively improves the mid- and high-frequency acoustic performance.
  • 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, so that the sounding cavity 20 has better sealing reliability.
  • the extension wall 313 or the cover plate 4 is at least partially grounded.
  • This structure combines the extension wall 313 and the cover plate 4 on the basis that both are made of metal materials, so as to realize the shielding effect of the rear cavity and improve the stability.
  • FIG. 5 is a schematic diagram of the structure of adding conductive elements in FIG. 3.
  • the extension wall 313 and the cover plate 4 are both made of metal materials.
  • the sound emitting device 100 further includes a conductive member 5, one end of the conductive member 5 is connected to at least one of the extension wall 313 and the cover plate 4, and the other end of the conductive member 5 is used for grounding, thereby forming
  • the shielding effect prevents the sound emitting device 100 from being electromagnetically interfered by the outside world, and has better working reliability.
  • one end of the conductive member 5 is connected to the cover plate 4, and the other end of the conductive member 5 is used for grounding.
  • FIG. 6, is a schematic diagram of the three-dimensional structure of another derivative embodiment of FIG. 5. That is, in the sound emitting device 500, the conductive member 55 is formed by extending at least one of the extension wall 5313 and the cover plate 54 to form an integral structure. That is, the conductive member 55 and the extension wall 5313 are formed as an integral structure, or the conductive member 55 and the cover 54 are formed as an integral structure and extend in a direction away from the basin frame 51. For example, the conductive member 55 and the cover 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. 3.
  • the difference between this embodiment and the embodiment shown in FIG. 5 lies in the structure and function of the conductive member.
  • the sound generating device 600 further includes a conductive member 65, which includes two mutually insulated electrical paths, one of the electrical paths is used to connect the vibration system 62 with an external electrical signal, and is used to generate sound.
  • the device 600 supplies power; the other electrical channel is used to ground at least one of the extension wall 6313 and the cover 64 to form a shield for the sound emitting device 600.
  • the conductive member 65 is used to form a shielding effect together with the cover plate 64 and the extension wall 6313, and is also used to supply power to the sound generating device 600, which has a simpler structure and can achieve dual functions.
  • the conductive member 65 is an FPC structure. As shown in FIGS. 7-8, the conductive member 65 includes a first arm 651 arranged at a distance from the magnetic yoke 631, and is formed by opposite ends of the first arm 651 The second arm 652 extending in the direction of the vibration system 62, the third arm 653 extending in the direction away from the extension wall 6313 from the first wall 651, and the first wall 651 along the direction of the vibration system 62 The fourth arm 654 bent and extended in the direction of the cover plate 64 and the fifth arm 655 bent and extended from the end of the fourth arm 654 in the direction perpendicular to the vibration direction of the vibration system.
  • the first arm 651 is electrically connected to the extension wall 6313
  • the second arm 652 is electrically connected to the vibration system 62
  • the third arm 653 is used for connecting external electrical signals
  • the fifth arm 655 is used for ⁇ GND.
  • the second arm 652 is fixed to the basin frame 61 and is electrically connected to the vibration system 62
  • the third arm 653 is used for connecting external electrical signals
  • the fifth arm 655 is used for grounding.
  • the first arm 651, the fourth arm 654, and the fifth arm 655 jointly connect the cover plate 64 or the extension wall 6313 to the ground to form an electrical path for shielding the sound emitting device 600; the first arm 651, the second arm 652, and the third arm 653 jointly realize the electrical connection between the sound emitting device 600 and the external electrical signal, and realize another electrical path for the sound emitting device 600 to communicate with the external electrical signal.
  • FIG. 9 is a schematic structural diagram of an embodiment in which an auxiliary shell is added to form a side sounding structure in FIG. 3.
  • 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 is further provided with a sound-guiding shell 8 on the side close to the diaphragm 821, and the sound-guiding shell 8 is arranged on the basin frame 81.
  • the sound-guiding shell 8 has a sound-guiding cavity 80 forming a side sound-emitting structure 801. ,
  • the sound guide cavity 80 communicates with the diaphragm 821.
  • the side sound structure 801 can better guide the sound, which is convenient for use when the front sound is blocked, and the use flexibility is higher.
  • the sound conducting shell 8 includes a sound conducting shell plate 802 arranged at intervals on the side of the vibrating membrane 821 away from the magnetic circuit system 83, and a sound conducting shell plate 802 that extends from the periphery of the sound conducting shell plate 802 to the vibrating membrane 821
  • the sound-guiding shell extension wall 803 is bent and extended in the direction, the sound-guiding shell 8 and the diaphragm 821 jointly enclose a sound-guiding cavity 80, and the side sound-emitting structure 801 is provided through the sound-guiding shell extension wall 803.
  • the side sound structure 801 connects the sound guide cavity 80 with the outside to form a side sound, which is convenient for flexible use of different installation positions.
  • the sound guide cavity 80 can be directly connected with the diaphragm 821 (that is, without the structure of the front cover 807), or the diaphragm 812 can first communicate with the front acoustic cavity 8103 formed by the front cover 807 and the diaphragm 821, and then pass through The through hole 871 opened on the front cover 807 communicates with the sound guide cavity 80 so as to achieve indirect communication, which is all feasible.
  • FIG. 10 is a schematic diagram of an embodiment in which a breathable spacer is added in FIG. 4.
  • the sounding device 900 further includes a gas-permeable spacer 91 located in the rear cavity 910.
  • the gas-permeable spacer 91 includes a spacer body 911 arranged opposite to the cover plate 94, and a spacer body 911 formed by the spacer body 911.
  • the spacer extension part 912 whose periphery is bent and extended in the direction of the cover plate 94 and the spacer fixing part which is bent and extended from the end of the spacer extension part 912 away from the spacer body 911 towards the extension wall 9313 913.
  • the spacer extension portion 912 is spaced apart from the extension wall 9313, and the spacer fixing portion 913 is fixed to the cover 94.
  • the air-permeable spacer 91 and the cover plate 94 jointly enclose a powder filling space 90, which is used to fill sound-absorbing particles to form a D-BASS virtual sound cavity, which further improves the acoustic performance.
  • the structure of the spacer extension 912 and the extension wall 9313 is arranged so that the air flow in the rear cavity 910 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 1091 close to the yoke body 1311 is recessed in a direction away from the yoke body 1311 to form an escape step 1914, and the escape step 1914 is in line with the leakage portion 1312 Pair set.
  • This structural arrangement can make the leakage of the sounding cavity 1020 of the sounding device 1000 smoother, thereby improving the sounding 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 sound generating device 1100 further includes at least two positioning pieces 6, and the positioning pieces 6 are connected to opposite sides or two opposite corners of the extension wall 11313 or the cover plate 1104.
  • One end of the positioning piece 6 away from the extension wall 11313 or the cover plate 1104 is provided with a positioning hole 1061 penetrating therethrough, which is used to fix and position the sounding device 1100 and the application terminal, such as a threaded hole, using a screw It can be fixed to the whole terminal machine through the positioning hole 1061, which is simple and convenient, and the positioning sheet 6 is provided with at least two positioning sheets 6 to form a positioning fixation more effectively.
  • the two positioning pieces 6 are connected to opposite sides or two diagonal corners of the extension wall 11313 or the cover plate 1104, and are arranged symmetrically so that the sound emitting device 1100 is positioned and fixed to the entire terminal. better.
  • the positioning piece 6 is fixed to the extension wall 11313 or the cover plate 1104 by welding, that is, the positioning piece 6 and the extension wall 11313 or the cover plate 1104 are a separate structure of two devices.
  • the positioning piece 6 can also be used for grounding at the same time to form a shield for the sound emitting device 1100.
  • FIG. 14 is a schematic structural diagram of a derivative embodiment of the embodiment shown in FIG. 13.
  • the positioning piece 1206 is formed by the extension wall 12313 or the cover 1204 extending away from the sound emitting device 1200, namely The positioning piece 1206 and the extension wall 12313 or the cover plate 1204 are integrally formed, which is simple to form, reduces the number of components, and improves assembly efficiency.
  • the yoke is designed as a yoke body fixed to the basin frame and an extension wall extending from the yoke body in a direction away from the vibration system, so that the yoke forms a half
  • the cavity structure is further covered by a cover plate at the end of the extension wall away from the yoke body, so that the yoke body, the extension wall and the cover plate jointly enclose a sealed back cavity, and the yoke body is provided with a connected back
  • the leaking part of the cavity, the sound emitting device is not only simple in structure and small in overall size increase, but also makes the acoustic effect of the sound emitting device, especially the low frequency acoustic effect better, and the sealed rear cavity structure makes the sound emitting device avoid the shell after being used in the mobile terminal The occurrence of vibration phenomenon 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)
  • Telephone Set Structure (AREA)

Abstract

L'invention concerne un dispositif de génération de son, comprenant un système de vibration et un système de circuit magnétique ; le système de circuit magnétique comprend une culasse espacée du système de vibration et opposée à celui-ci et un acier magnétique fixé à la culasse, et la culasse comprend un corps de culasse espacé du système de vibration et opposé à celui-ci, une partie de fuite qui pénètre dans le corps de culasse, et une paroi d'extension annulaire qui se courbe et s'étend depuis le corps de culasse vers une direction éloignée du système de vibration, la paroi d'extension étant située sur la périphérie de l'acier magnétique le long de la direction de vibration du système de vibration. Le dispositif de génération de sons comprend en outre une plaque de recouvrement qui recouvre et est fixée à une extrémité de la paroi d'extension éloignée du corps de l'étrier ; la plaque de recouvrement, la paroi d'extension et le corps de l'étrier s'enferment conjointement pour former une cavité arrière étanche, et la partie de fuite communique avec la cavité arrière ; et l'étrier ou la plaque de recouvrement est également pourvu d'un trou de fuite qui y pénètre, et le trou de fuite met la cavité arrière en communication avec l'extérieur. Par rapport à la technologie connexe, le dispositif de génération de sons du présent modèle d'utilité présente une structure simple, une excellente performance acoustique et un bon effet d'expérience utilisateur.
PCT/CN2020/097139 2020-05-29 2020-06-19 Dispositif de génération de son WO2021237838A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202020977816.0U CN212628377U (zh) 2020-05-29 2020-05-29 发声器件
CN202020977816.0 2020-05-29

Publications (1)

Publication Number Publication Date
WO2021237838A1 true WO2021237838A1 (fr) 2021-12-02

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PCT/CN2020/097139 WO2021237838A1 (fr) 2020-05-29 2020-06-19 Dispositif de génération de son

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CN (1) CN212628377U (fr)
WO (1) WO2021237838A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108566598A (zh) * 2018-04-24 2018-09-21 歌尔股份有限公司 一种发声装置
CN108566597A (zh) * 2018-04-24 2018-09-21 歌尔股份有限公司 一种发声装置
CN109218929A (zh) * 2018-01-10 2019-01-15 歌尔股份有限公司 发声器
US10609465B1 (en) * 2018-10-04 2020-03-31 Bose Corporation Acoustic device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109218929A (zh) * 2018-01-10 2019-01-15 歌尔股份有限公司 发声器
CN108566598A (zh) * 2018-04-24 2018-09-21 歌尔股份有限公司 一种发声装置
CN108566597A (zh) * 2018-04-24 2018-09-21 歌尔股份有限公司 一种发声装置
US10609465B1 (en) * 2018-10-04 2020-03-31 Bose Corporation Acoustic device

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