WO2020087754A1 - Dispositif d'émission sonore et casque d'écoute - Google Patents

Dispositif d'émission sonore et casque d'écoute Download PDF

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Publication number
WO2020087754A1
WO2020087754A1 PCT/CN2018/125704 CN2018125704W WO2020087754A1 WO 2020087754 A1 WO2020087754 A1 WO 2020087754A1 CN 2018125704 W CN2018125704 W CN 2018125704W WO 2020087754 A1 WO2020087754 A1 WO 2020087754A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
circuit system
magnetic circuit
generating device
yoke
Prior art date
Application number
PCT/CN2018/125704
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English (en)
Chinese (zh)
Inventor
郭晓冬
侯燕燕
刘春发
Original Assignee
歌尔股份有限公司
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 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020087754A1 publication Critical patent/WO2020087754A1/fr

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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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
    • H04R9/06—Loudspeakers

Definitions

  • the present invention belongs to the technical field of electroacoustic transduction, and in particular, the present invention relates to a sound emitting device.
  • the sound-generating device is an important electroacoustic transduction component in consumer electronic products, and it is widely used as a speaker, an earpiece, an earphone, and the like. As the performance of electronic products improves, the improvement of the acoustic performance of sound-generating devices is also an inevitable trend. In order to meet better acoustic performance, the sound-generating device often needs to be equipped with a magnetic circuit system with a larger size and a stronger magnetic field strength. In the sound-generating device, the size of the voice coil and the size of the magnetic circuit system are matched with each other.
  • the leads of the voice coil and related circuit components are disposed outside of the voice coil, thereby limiting the size of the voice coil and the magnetic circuit system, causing the problem of difficulty in optimizing acoustic performance .
  • the voice coil is easily polarized when it vibrates in the sound-generating device, thereby causing flaws in the acoustic effect.
  • the sound-generating device needs to leave enough space for the lead in the vibration direction of the voice coil to avoid the lead from rubbing with other components, which will cause the height of the bracket around the sound-generating device in the vibration direction of the voice coil to increase, resulting in sound
  • the increased volume of the device is not conducive to configuring a larger-sized magnetic circuit system.
  • An object of the present invention is to provide an improved sound generating device.
  • a sound emitting device including:
  • a magnetic circuit system a through hole is formed in the center of the magnetic circuit system, and the magnetic circuit system has an annular magnetic gap formed around the through hole;
  • a vibration assembly the vibration assembly includes a diaphragm and a voice coil, the voice coil is connected to one side surface of the diaphragm, the edge of the diaphragm is fixed in the sound-generating device, and the voice coil is suspended from the In the magnetic gap;
  • a conductive pillar the conductive pillar passes through the through hole and is exposed from the upper end of the magnetic circuit system, the top end of the conductive pillar has two first electrical connection points, and two leads are drawn out from the inner side of the voice coil, Two leads are electrically connected to the two first electrical connection points respectively;
  • the upper end surface of the conductive column is flush with or lower than the upper end surface of the voice coil, the distance between the upper end surface of the conductive column and the upper end surface of the voice coil is the first distance L1, and the magnetic circuit
  • the distance between the upper end face of the central magnetic part of the system and the upper end face of the voice coil is a second distance L2, the first distance L1 is greater than or equal to 0, and the first distance L1 is less than or equal to a second distance of 0.3 times L2.
  • the diameter of the outer periphery of the magnetic circuit system is a first diameter D1
  • the diameter of the portion of the conductive pillar located in the through hole is a second diameter D2
  • the second diameter D2 is less than or equal to 0.32 Times the first diameter D1.
  • the outer diameter of the magnetic circuit system is a first diameter D1
  • the outer diameter of the sound emitting device is a third diameter D3
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65 .
  • the positions where the two leads are drawn from the voice coil are center symmetrical with respect to the center of the voice coil.
  • two of the lead wires are bent and extended from the voice coil to two of the first electrical connection points.
  • the two leads extend in a V-shape; or extend in an S-shape.
  • the two lead wires are axisymmetric with respect to a radial symmetry axis of the voice coil.
  • two second electrical connection points are formed on the bottom end of the conductive pillar, the two second electrical connection points are configured to form an electrical connection with an external device, and the two second electrical connections The points form electrical connections with the two first electrical connection points, respectively.
  • the bottom end of the conductive pillar is exposed from the bottom of the magnetic circuit system, and a support portion is formed at the bottom end of the conductive pillar, and the support portion covers the bottom surface of the magnetic circuit system.
  • the conductive post includes a plastic body part with an inverted T shape on the side and two metal parts injection-molded into the plastic body part, the metal part includes a parallel first end and a second end, And an intermediate portion connecting the first end and the second end, the first end forms a first electrical connection point, and the second end forms a second electrical connection point.
  • the magnetic circuit system includes a yoke and a central magnetic part, the yoke has a bottom wall and a side wall, the central magnetic part is disposed in the yoke, and the central magnetic part includes stacked The magnet and the magnetic conductive plate, the central magnetic portion and the bottom wall of the yoke are formed with the through hole penetrating therethrough, and the magnetic gap is formed between the central magnetic portion and the side wall of the yoke.
  • it also includes a carrier frame made of plastic material, the edge of the diaphragm is fixedly connected to the upper end surface of the carrier frame, the center of the carrier frame has a hollow, and the magnetic circuit system is fixed to the hollow Office.
  • the magnetic circuit system is a cylindrical structure
  • Several flanges extending toward the periphery of the yoke are formed at the top edge of the yoke, and the yoke and the flange are integrally stamped and formed;
  • a positioning portion is formed on the lower end surface of the bearing frame
  • the yoke is positioned at the hollow from the side of the lower end surface of the bearing frame, and the flange extends horizontally to the bottom of the bearing frame and is fixedly connected to the positioning portion.
  • the positioning portion includes a positioning groove formed on a lower end surface of the bearing frame, the positioning groove extends to the hollow, and the flange is embedded in the positioning groove.
  • the positioning portion includes a hot-melt structure formed on the lower end surface of the carrying frame, and the hot-melt structure is fixedly connected to the flange by hot-melt;
  • the positioning portion further includes a positioning groove formed on the lower end surface of the bearing frame, the positioning groove extends to the hollow, the hot-melt structure is located in the positioning groove, and the flange Embedded in the positioning groove;
  • the shape of the cutout matches the shape of the yoke, the upper end of the yoke is embedded in the cutout, and the depth of the yoke embedded in the cutout is equivalent to the depth of the positioning groove.
  • the invention also provides an earphone, the earphone is provided with the above sound-generating device.
  • One technical effect of the present invention is to effectively save space and facilitate the installation of a larger voice coil and / or magnetic circuit system.
  • FIG. 1 is an exploded view of the sounding device provided by the present invention
  • FIG. 2 is a schematic top view of the sound-generating device provided by the present invention.
  • FIG. 3 is a side cross-sectional view of the sound-generating device provided by the present invention.
  • the invention provides a sound-generating device.
  • the sound-generating device includes a magnetic circuit system, a vibration component and a conductive column.
  • a conductive post for conducting a signal is provided inside the voice coil of the vibrating assembly, thereby changing the connection method of the lead wire drawn from the voice coil. With this design, the polarization problem of the voice coil can be improved.
  • a through hole 10 is formed in the center of the magnetic circuit system, and the through hole 10 penetrates from the bottom of the magnetic circuit system to the top of the magnetic circuit system.
  • a magnetic gap 13 is formed in the magnetic circuit system, and a magnetic field is formed in the magnetic gap 13, which is used to drive the vibration component to vibrate.
  • the magnetic gap 13 has a ring shape, which surrounds the periphery of the through hole 10.
  • the vibration component includes a diaphragm 21 and a voice coil 22.
  • a voice signal can be passed into the voice coil 22, and the voice coil 22 can generate vibration under the action of the magnetic field of the magnetic circuit system.
  • the edge of the diaphragm 21 is fixedly connected to the sound-generating device, the voice coil 22 is connected to one side surface of the diaphragm 21, and the voice coil 22 is suspended in the magnetic gap 13 formed by the magnetic circuit system .
  • the voice coil 22 can drive the diaphragm to vibrate together when vibrating, so that the diaphragm vibrates to generate sound.
  • Two lead wires 221 are drawn out from the voice coil 22, and the lead wires 221 are used to introduce sound signals into the voice coil 22.
  • the conductive pillar 3 is inserted into the through hole 10 of the magnetic circuit system, and the top end of the conductive pillar 3 is exposed from the top of the magnetic circuit system.
  • the conductive post 3 is used to introduce a sound signal to the voice coil 22.
  • Two first electrical connection points 31 are formed on the top of the conductive pillar 3.
  • the two lead wires 221 drawn out from the inner side of the voice coil 22 extend toward the inner side of the voice coil 22, and the two lead wires 221 are electrically connected to the two first electrical connection points 31 in one-to-one correspondence.
  • the conductive post 3 may have a circuit component for transmitting a sound signal to the first electrical connection point 31.
  • the voice coil 22 is connected through the two leads 221 and the corresponding first electrical connection points 31 to form a signal loop.
  • the lead wire drawn from the voice coil does not extend toward the outer periphery of the voice coil, but extends toward the central area of the voice coil.
  • the lead wire is connected to the top of the conductive post located at the through hole, and the pulling force generated by the lead wire is concentrated toward the center of the voice coil. Since the conductive post for conducting the signal is provided at the through hole located in the central area of the magnetic circuit system, the sound generating device does not need to provide other components for conducting the signal on the periphery of the voice coil, saving space.
  • This layout method helps to configure the voice coil and the magnetic circuit system with a larger size and a larger volume without changing the overall volume of the sound-generating device, and helps to increase the output power of the sound-generating device to meet the requirements of acoustic performance.
  • the distance between the upper end surface of the conductive column and the upper end surface of the voice coil is a first distance L1
  • the distance between the upper end surface of the central magnetic portion of the magnetic circuit system and the upper end surface of the voice coil is a second distance L2.
  • the first distance L1 refers to the vertical distance between the upper end surface of the conductive column and the upper end surface of the voice coil along the axial direction of the conductive column.
  • the second distance L2 refers to the vertical distance of the central magnetic portion of the magnetic circuit system from the upper end surface of the voice coil along the axial direction of the voice coil.
  • the upper end surface of the conductive pillar is flush with or lower than the upper end surface of the voice coil, as shown in FIG. 3, that is, the first distance L1 is greater than or equal to 0.
  • the upper end surface of the conductive column is lower, which can effectively avoid the collision between the diaphragm and the conductive column, and prevent the noise caused by the collision with the conductive column when the diaphragm vibrates.
  • the first distance L1 is less than or equal to 0.3 times the second distance L2. If the distance between the upper end surface of the conductive column and the upper end surface of the voice coil is too large, it will cause the lead of the voice coil to easily collide with the central magnetic part of the magnetic circuit system, resulting in collision sound. On the one hand, the generated noise will reduce the sound quality of the sounding device, on the other hand, there will also be a risk of disconnection of the voice coil lead.
  • the first distance L1 is greater than or equal to 0, and the first distance L1 is less than or equal to 0.3 times the second distance L2.
  • the diameter of the outer periphery of the magnetic circuit system is the first diameter D1
  • the diameter of the portion of the conductive pillar located in the through hole is the second diameter D2.
  • the second diameter D2 is less than or equal to 0.32 times the first diameter D1.
  • the part of the magnetic circuit system close to the magnetic gap is the part that contributes the most to the generation of electromagnetic force, and the position of the through hole is far from the magnetic gap. Therefore, opening a through hole and placing a conductive post in the center of the magnetic circuit system away from the magnetic gap can effectively avoid the influence of the structural loss of the magnetic circuit system on the generation of electromagnetic fields.
  • the conductive pillar has the second diameter D2 as small as possible within the process controllable range. In the range of D2 ⁇ 0.32 * D1, it can avoid substantial negative impact on the intensity of the generated electromagnetic field, and the sensitivity loss is below 0.2dB.
  • the diameter of the outer periphery of the sounding device is the third diameter D3.
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65.
  • the invention electrically connects the voice coil to the outside by using a conductive column arranged at the center of the magnetic circuit system, and no other electrical connection is needed at the periphery of the magnetic circuit system, thereby saving space at the periphery of the magnetic circuit system.
  • the size of the magnetic circuit system can be designed to be larger to improve the performance of the magnetic circuit system.
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65.
  • the ratio of the first diameter D1 to the third diameter is 0.75.
  • the positions where the two lead wires 221 are drawn from the voice coil 22 are distributed in a center-symmetrical manner with respect to the center of the voice coil 22. Since the positions of the two lead wires are center symmetrical with respect to the center of the voice coil, when the voice coil vibrates, the pulling force of the lead wire on the voice coil is symmetrical. With this design, the stability and balance of the voice coil vibration can be effectively improved. Although the pulling force generated by the lead may hinder the vibration of the voice coil, the symmetrical force generated by the two leads can reduce the risk of polarization of the voice coil and help improve the sound quality of the sound generating device.
  • the lead wire after the lead wire is drawn out from the voice coil, it extends into a conductive post located in the central area of the voice coil in a bent and extended manner, and forms an electrical connection with the first electrical connection point.
  • Configuring the lead wire to extend by bending can increase the length of the lead wire, so that the lead wire has better deformability.
  • one end of the lead is fixedly connected to the first electrical connection point, and the other end is fixedly connected to the main body of the voice coil.
  • the bent extension leads have better deformability, and can deform with the vibration of the voice coil, reducing the possibility of the voice coil breaking due to vibration.
  • the lead wire can be deformed to form a buffer to avoid the excessive pulling force of the lead wire on the voice coil, reduce the impact of the pull force generated by the lead wire on the amplitude of the voice coil, improve the power conversion rate of the voice coil, and ensure the sound generating device The loudness of the sound output.
  • the lead 221 extends in a V shape.
  • Designing the lead 221 as a V-shape not only enables the lead to have better deformability and is not easy to break and damage, but also restores the lead to its original shape after the voice coil stops shaking, reducing the possibility of irreversible plastic deformation of the lead.
  • the present invention does not specifically limit the bending shape of the lead.
  • the lead may be designed to extend in an S shape or extend in another shape.
  • the two lead wires are distributed axisymmetrically with respect to a radial symmetry axis of the voice coil.
  • the two lead wires 221 are distributed axisymmetrically with respect to the longitudinal diameter of the voice coil 22 in the figure.
  • the pulling forces generated by the two leads in this distribution mode are also symmetrical to each other.
  • the leads can help balance the posture of the voice coil and more effectively reduce the possibility of polarization of the voice coil.
  • two second electrical connection points 32 are formed on the bottom end of the conductive pillar 3.
  • the two second electrical connection points 32 are configured to form an electrical connection with an external device to introduce a sound signal from the external electronic device into the sound emitting device.
  • the two second electrical connection points 32 form electrical connections with the two first electrical connection points 31, respectively.
  • the sound-generating device provided by the present invention needs to be assembled into other electronic equipment, such as mobile phones, earphones, small speakers and other equipment. Therefore, the sound-generating device usually needs to receive the sound signal from other equipment and then convert the sound signal into sound.
  • the sound signal on the external device can be introduced into the conductive column.
  • the sound signal can be transmitted to the lead via the second electrical connection point and the first electrical connection point.
  • the second electrical connection point is formed at the bottom end of the conductive post, and the through hole penetrates the magnetic circuit system, so when the second electrical connection point is electrically connected to an external device, It is convenient to arrange the electrical connection piece from the bottom of the magnetic circuit system, and then connect with the second electrical connection point. This design method is convenient for electrical connection, and is more compatible with the way the sound-emitting device is assembled to external equipment.
  • the bottom end of the conductive post 3 is exposed from the bottom of the magnetic circuit system. Exposing the bottom end of the conductive post 3 from the magnetic circuit system can more electrically connect the second electrical connection point 32 with an external device, and can also simplify the structural design of the external device and simplify the assembly of the sound emitting device to the external device the way.
  • a supporting portion 33 may be formed at the bottom end of the conductive pillar 3.
  • the side structure of the conductive pillar 3 is inverted T-shaped.
  • the supporting portion 33 can improve the assembly positioning accuracy between the conductive post 3 and the magnetic circuit system, and can also improve the integration degree of the conductive post 3 and the magnetic circuit system.
  • the bottom surface of the supporting portion can be used as the bottom surface of the entire sound-generating device, and is used for contacting with external devices, fitting and fitting.
  • the invention does not limit how the first electrical connection point and the second electrical connection point are electrically connected in the conductive post.
  • components such as conductive sheets or wires may be used in the conductive posts to electrically connect the two second electrical connection points with the two first electrical connection points, respectively.
  • the present invention provides a specific embodiment.
  • the conductive pillar includes a plastic body portion, and the plastic body portion serves as the main structure of the conductive pillar, and the side surface thereof has an inverted T-shaped structure.
  • the conductive post further includes two metal parts, and the two metal parts are injection-molded and fixed in the plastic body part.
  • the metal piece has a first end, a second end and an intermediate portion. The first end and the second end of the same metal piece are in a relatively parallel posture, and the middle portion is connected between the first end and the second end. The first end is used to form the first electrical connection point, and the second end is used to form the second electrical connection point.
  • the first end portion may be exposed from the top surface of the plastic body portion, and the second end portion may be exposed from the bottom surface of the plastic body portion.
  • This configuration is convenient for the leads and external devices to realize signal conduction through the metal parts.
  • the middle part of the metal part is injection-molded inside the plastic body part, and it is not easy to interfere with other conductive and magnetically conductive parts in the sound emitting device.
  • the magnetic circuit system may further include a yoke 12 and a central magnetic portion 11, the yoke 12 has a bottom wall and a side wall, as shown in FIGS.
  • the central magnetic portion 11 is disposed in the yoke 12.
  • the central magnetic portion 11 includes a magnet and a magnetic conductive plate, and the magnet and the magnetic conductive plate are stacked. Perforations are formed in the center of the central magnetic portion 11 and the bottom wall of the yoke 12, and the perforations of the two are butted to form the through hole 10.
  • the magnetic gap 13 is formed between the central magnetic portion 11 and the side wall of the yoke 12. The magnetic gap 13 is located around the through hole 10.
  • the sound-emitting device may further include a bearing frame 4 made of a plastic material, and the bearing frame 4 is used to provide components such as the magnetic circuit system, the vibration assembly, the conductive post 3 and the like Support, positioning.
  • the edge of the diaphragm 21 is fixedly connected to the upper end surface of the carrying frame 4, the central area of the carrying frame 4 has a hollow, the voice coil 22 is suspended at the hollow, and the magnetic circuit system is fixed Set in the hollow.
  • the bearing frame 4 only forms a fixed connection with the top of the yoke 12 through the hollow and the lower end surface.
  • the bearing frame 4 does not surround the side walls and the bottom wall of the yoke 12.
  • the bearing frame can not only play the role of positioning and fixing, but also does not occupy too much space, which provides conditions for the sound-emitting device to be equipped with a magnetic circuit system of larger size and volume.
  • the entire magnetic circuit system may have a cylindrical structure, as shown in FIGS. 1 and 3.
  • the hollow on the bearing frame 4 is circular, so that the magnetic circuit system is docked at the hollow.
  • a flange extending toward the outside of the yoke is formed at the top edge of the yoke.
  • the flange extends from the top of the side wall to the periphery of the side wall.
  • the flange is used to form a fixed connection with the bearing frame.
  • the yoke and the flange are integrally formed by stamping.
  • the one-piece stamping structure has high reliability and is easier to assemble.
  • a positioning portion is formed on the lower end surface of the carrying frame.
  • the yoke is provided at the hollow from one side of the lower end surface of the bearing frame.
  • the flange corresponds to the position of the positioning portion.
  • the flange extends horizontally to the bottom of the carrying frame, and the two form a fixed connection, so that the magnetic circuit system and the carrying frame are fixedly connected.
  • the positioning portion includes a positioning groove formed on a lower end surface of the carrying frame, and the positioning groove is recessed a distance upward from the lower end surface of the carrying frame. Moreover, the positioning groove extends along the surface of the lower end surface and extends to the hollow. That is, it extends to the edge of the cutout.
  • the flange is embedded in the positioning groove.
  • the positioning groove By configuring the positioning groove, the positioning accuracy between the bearing frame and the yoke can be improved.
  • the positioning portion includes a hot-melt structure formed on the lower end surface of the carrying frame.
  • the flange is at a position corresponding to the hot-melt structure, and the flange may be in contact with the hot-melt structure.
  • the hot-melt structure undergoes hot-melt treatment, and the hot-melt structure covers the flange to form a fixed connection with the flange.
  • the flange and the hot-melt structure realize a reliable fixed connection by means of hot-melt connection to ensure the structural reliability of the sound-emitting device.
  • the positioning portion may include the hot-melt structure and the above-mentioned positioning groove.
  • the hot-melt structure is located in the positioning groove, the flange is embedded in the positioning groove, and is fixedly connected with the hot-melt structure in the positioning groove.
  • the cooperation between the positioning groove and the flange can improve the positioning accuracy of the bearing frame and the magnetic circuit system.
  • the hot-melt structure when the hot-melt structure is hot-melted, the hot-melt structure can flow into the positioning groove and be wrapped around the flange, thereby improving the fixed connection between the load-bearing frame and the yoke reliability.
  • the hot melt structure in the positioning groove, at least a part of the hot melt structure can be prevented from flowing to a position away from the flange after being melted, and defects such as appearance defects of the product caused by the hot melt structure flowing can be prevented.
  • the invention also provides an earphone product, the earphone is equipped with the sound generating device.
  • the sound-generating device designed by the present invention can make more effective use of space, and configure a larger magnetic circuit system and / or voice coil to enhance the acoustic performance of the sound-generating device, thereby satisfying the performance of the earphone Claim.

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

Abstract

La présente invention concerne un dispositif d'émission sonore et un casque d'écoute. Le dispositif d'émission sonore comprend : un système de circuit magnétique, un trou traversant étant formé au niveau d'une partie centrale du système de circuit magnétique, et un espace magnétique annulaire est formé à la périphérie du trou traversant; un ensemble de vibration comprenant un diaphragme de vibration et une bobine acoustique, la bobine acoustique étant reliée à une surface latérale du diaphragme de vibration et suspendue dans l'espace magnétique; et un montant électriquement conducteur passant à travers le trou traversant et exposé à une extrémité supérieure du système de circuit magnétique, l'extrémité supérieure du montant électroconducteur ayant deux premiers contacts électriques, deux fils s'étendant à partir d'un côté interne de la bobine acoustique, et les deux fils sont respectivement connectés électriquement aux deux premiers contacts électriques, une surface d'extrémité supérieure du montant électroconducteur est au même niveau, ou est inférieure, à une surface d'extrémité supérieure de la bobine acoustique, la surface d'extrémité supérieure du montant électroconducteur et la surface d'extrémité supérieure de la bobine acoustique sont espacées d'une première distance L1, une surface d'extrémité supérieure d'une partie magnétique centrale du système de circuit magnétique et la surface d'extrémité supérieure de la bobine acoustique sont espacées d'une seconde distance L2, la première distance L1 est supérieure ou égale à 0, et la première distance L1 est inférieure ou égale à 0,3 fois la seconde distance L2.
PCT/CN2018/125704 2018-11-02 2018-12-29 Dispositif d'émission sonore et casque d'écoute WO2020087754A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201821809498.6 2018-11-02
CN201821809498.6U CN208891036U (zh) 2018-11-02 2018-11-02 发声装置和耳机

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WO2020087754A1 true WO2020087754A1 (fr) 2020-05-07

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WO (1) WO2020087754A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109348339B (zh) * 2018-11-02 2024-03-08 歌尔股份有限公司 发声装置和耳机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202435569U (zh) * 2011-12-01 2012-09-12 常州美欧电子有限公司 耳机芯
CN104254033A (zh) * 2014-09-15 2014-12-31 东莞市伟旺达电子有限公司 一种中孔出线式受话器
CN106385652A (zh) * 2016-12-05 2017-02-08 深圳市睿冠科技有限公司 一种耳机微型扬声器组件

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202435569U (zh) * 2011-12-01 2012-09-12 常州美欧电子有限公司 耳机芯
CN104254033A (zh) * 2014-09-15 2014-12-31 东莞市伟旺达电子有限公司 一种中孔出线式受话器
CN106385652A (zh) * 2016-12-05 2017-02-08 深圳市睿冠科技有限公司 一种耳机微型扬声器组件

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