WO2020135289A1 - Appareil de production de sons de vibration d'écran et produit électronique - Google Patents

Appareil de production de sons de vibration d'écran et produit électronique Download PDF

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Publication number
WO2020135289A1
WO2020135289A1 PCT/CN2019/127256 CN2019127256W WO2020135289A1 WO 2020135289 A1 WO2020135289 A1 WO 2020135289A1 CN 2019127256 W CN2019127256 W CN 2019127256W WO 2020135289 A1 WO2020135289 A1 WO 2020135289A1
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WO
WIPO (PCT)
Prior art keywords
screen
magnetic core
magnet
coil
magnetic
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Application number
PCT/CN2019/127256
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English (en)
Chinese (zh)
Inventor
朱跃光
刘春发
毛东升
史德璋
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歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020135289A1 publication Critical patent/WO2020135289A1/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
    • 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 technical field of electronic products of the present invention in particular, relates to a screen vibration sound generating device and electronic products.
  • the sound-generating device is an important electroacoustic transducing element in electronic products, which is used to convert current signals into sound. With the rapid development of electronic products in recent years, the sound-generating devices used in electronic products have also been improved accordingly.
  • the principle used by the conventional sound-generating device for the handset of the mobile phone is that the diaphragm pushes the air to vibrate and sound.
  • the linear vibration motor uses a linear vibration motor to drive the screen to vibrate, as shown in Figure 1.
  • the linear vibration motor has a vibrator 01 connected to the spring 03.
  • the linear vibration motor has a housing 02 which encloses the vibrator 01, spring 03 and other components therein.
  • the motor case 02 is fixedly connected to the inner surface of the mobile phone screen 04.
  • the vibrator 01 will vibrate, which in turn causes the spring 03 to elastically deform.
  • the vibration generated by the elastic deformation of the spring 03 is transmitted to the screen through the housing 02, and then the screen vibrates and sounds.
  • a person skilled in the art directly converts the existing linear vibration motor into a technical solution for screen sound generation, thereby realizing screen vibration sound generation.
  • the disadvantage of this technical solution is that the vibration generated by the vibrator 01 is transmitted to the entire motor through the spring 03, so that the motor and the housing 02 vibrate together.
  • the vibrator 01 resonates with the case 02 and the screen to drive the screen to vibrate and sound.
  • the vibrator of the vibration motor needs to generate vibration with a larger amplitude. Therefore, the vibration motor itself needs to occupy more space in the vibration direction of the vibrator, which is very disadvantageous for the design of the thin and light structure of the mobile phone.
  • the internal structure of the linear vibration motor is relatively complex and has many parts, which increases the difficulty of assembly and increases the cost of the product.
  • FIG. 2 Another technical solution adopted by those skilled in the art is shown in FIG. 2.
  • This technical solution adopts a structure distribution manner in which one electromagnet 05 and one magnet 06 are placed relative to each other, by opening and closing the electromagnet 05, or switching the electromagnet 05
  • the magnetic pole makes the electromagnet 05 and the magnet 06 have varying adsorption and repulsion effects.
  • the magnet 06 is fixed on the mobile phone screen 04, and the electromagnet 05 is fixed on the stationary parts of the mobile phone, so that the mobile phone screen 04 can be vibrated.
  • this technical solution also has the problem of taking up more space, which is not conducive to the thin and thin structure design of the mobile phone.
  • An object of the present invention is to provide a new technical solution for screen vibration and sound.
  • a screen vibration sound generating device including:
  • a vibration component the vibration component includes a screen and a fixing member, the screen is configured to be able to vibrate relative to the fixing member;
  • a driving assembly the driving assembly includes a magnetic core, a coil, and a magnet, the coil is wound on the magnetic core, the magnet is fixedly connected to one of the screen or the fixing member, and the magnetic core and the coil are A fixed connection of the screen and the fixing member that is not fixedly connected to the magnet;
  • the axis of the magnetic core is perpendicular to the surface of the screen, the magnet is located adjacent to the magnetic core in the radial direction of the magnetic core, and the magnetic pole direction of the magnet is perpendicular to the surface of the screen.
  • the coil is configured to pass an alternating current signal to cause the magnetic core to generate magnetic poles perpendicular to the surface of the screen, thereby generating a direction perpendicular to the surface of the screen between the magnetic core and the magnet Magnetic force
  • the alternating current signal passing through the coil causes the magnetic poles generated by the magnetic core to alternately and reversely change, thereby to alternately and reversely change the direction of the magnetic force, and the vibration component is subjected to the alternating
  • the magnetic force causes the screen to vibrate and sound relative to the fixture.
  • the drive assembly includes at least two of the magnets, each of the magnets is disposed around the magnetic core in a center-symmetric or rotationally symmetrical manner with respect to the axis of the magnetic core, and each of the magnets The direction of N pole and S pole is the same.
  • the magnet is a ring magnet, and the axis of the ring magnet coincides with the axis of the magnetic core.
  • the drive assembly further includes a magnetic core ring, and the magnetic core ring is sleeved on the magnetic core.
  • the coil is wound in an area where the magnetic core is close to the screen, the magnetic core ring is sleeved in an area where the magnetic core is away from the screen, and the magnetic core ring is in contact with the coil,
  • the magnetic core ring is configured to concentrate the magnetic field generated by the magnet on the magnetic core, so that the magnetic field passes through the coil in a direction parallel to the surface of the screen, and after a current signal is passed into the coil, Amps can be generated between the coil and the magnet.
  • the fixing member is provided with an opening at a position directly facing the magnetic core, the opening is provided for inserting the magnetic core therein, and the magnet is provided at a position around the opening.
  • the drive assembly further includes a magnetic conductive plate sandwiched between the magnet and the vibration component connected thereto.
  • the driving assembly includes a circuit board, the circuit board and the coil are electrically connected, and the circuit board and the coil are disposed on the same component of the vibration assembly.
  • an electronic product including:
  • the screen is provided on the product body, the fixing member is a part of the structure of the product body, and the driving assembly is provided in the product body.
  • the fixing portion is a middle frame or a side wall in the product body.
  • the space occupied by the screen sounding device is effectively reduced.
  • FIG. 1 is a schematic side sectional view of a screen sounding technical solution in the prior art
  • FIG. 3 is a schematic side cross-sectional view of a screen vibration sound-generating device provided by the present invention.
  • FIG. 4 is a schematic diagram of some components of the screen vibration sound-generating device provided by the present invention.
  • the invention provides a screen vibration sound generating device, which includes a vibration component and a driving component.
  • the vibration assembly includes a screen 11 and a fixing member 12, and the screen 11 is configured to vibrate relative to the fixing member 12.
  • the fixing member 12 may be a certain fixing member in the electronic device to which the sound-emitting device is applied, or may be a separately arranged fixed part.
  • the driving assembly includes a coil 21, at least one magnet 22, and a magnetic core 23. The coil 21 is wound by a wire in one direction to form a closed ring structure, and the coil 21 is wound around the magnetic core.
  • the magnet 22 is fixed to one of the screen 11 or the fixing member 12, and the magnetic core 23 and the coil 21 are fixed to the screen 11 or the fixing member 12 where the magnet 22 is not provided.
  • the magnetic core 23 and the coil 21 are fixedly connected to the screen 11, and the magnet 22 is fixedly connected to the fixing member 12.
  • the magnetic core and the coil may be provided on the fixing member, and the magnet is fixed on the screen.
  • the magnetic core 23 has a columnar structure and has an axis.
  • the magnetic core 23 is made of a magnetically conductive material.
  • the coil 21 is wound on a cylindrical magnetic core 23, and the coil 21 is coaxial with the magnetic core 23.
  • the magnetic core 23 extends upward from the surface of the screen 11, and the coil 21 is wound at a position where the magnetic core 23 is close to the screen 11.
  • the magnet 22 is located next to the iron core 23.
  • the magnet 22 is located adjacent to the coil 21 and the magnetic core 23, and the magnet 22 is not in contact with the coil 21 and the magnetic core 23.
  • the magnetic pole direction of the magnet 23 is out of the surface of the screen 11. As shown in FIG.
  • the magnetic pole of the magnet 23 far from the screen 11 is N pole
  • the magnetic pole close to the screen 11 is S pole.
  • the magnetic poles of the magnet 23 extend in the vertical up and down directions.
  • the magnet 22 can generate a magnetic field, and when a current signal is passed through the coil 21, the coil 21 and the magnetic core 23 can be combined to form an electromagnet, which can also generate a magnetic field.
  • the magnetic poles of the magnetic core 23 also extend in a direction perpendicular to the surface of the screen 11 (ie, vertically up and down as shown in FIG. 3).
  • the directions of the N pole and S pole of the magnetic core 23 can be determined according to the right-handed spiral rule.
  • the direction of the magnetic pole of the magnetic core 23 will also alternately and reversely change. In this way, the magnetic force between the magnetic core 23 and the magnet 22 can be attracted or repelled in a direction perpendicular to the surface of the screen.
  • the screen vibration sound-generating device can drive the screen vibration more directly and concisely.
  • the magnetic core 23 and the magnet 22 are directly disposed on the screen 11 and the fixing member 12, respectively, which eliminates the housing, springs and other components compared with the prior art, reducing the product structure. the complexity.
  • the direct driving method of directly connecting the driving component and the vibration component simplifies the principle of driving the screen to vibrate, and the screen can directly generate vibration after being subjected to the magnetic force. This design method effectively improves the vibration conversion efficiency, without the need to cause resonance through the vibration of the vibrator to drive the screen vibration.
  • This design makes the amplitude that the screen can produce basically the same as the amplitude that the driving component can produce.
  • the space reserved for the driving component can be designed according to the performance requirements for the screen amplitude. There is no need to reserve a vibration space for the drive assembly that is significantly greater than the maximum amplitude of the screen.
  • the magnet 22 is provided on the side of the coil 21 and the magnetic core 23, and the magnet 22 and the coil 21 do not interfere with each other in the vibration path. With this distributed design, the space occupied by the vibration component in the vibration direction can also be reduced. In Fig. 3, the space occupied in the up and down directions is reduced.
  • the driving assembly includes at least two magnets 22.
  • a plurality of the magnets 22 are distributed around the magnetic core 23 in the form of center symmetry or rotational symmetry with respect to the axis of the magnetic core 23.
  • the directions of the N pole and S pole of each magnet are the same.
  • the advantage of this embodiment is that the magnet 22 can generate a magnetic force perpendicular to the surface of the screen 11 from each region and the magnetic core around the magnetic core 23. In this way, the magnetic force between the magnet and the magnetic core is balanced, and the relative tilt and offset caused by the imbalance of the two forces are reduced.
  • the driving assembly includes two magnets 22, and the two magnets 22 are respectively located on the left and right sides of the magnetic core 23.
  • this preferred embodiment can improve the acoustic performance, and on the other hand, it is not easy to cause bending, deformation and other damage to the vibration component and the driving component.
  • the magnet is a ring magnet
  • the ring magnet is disposed around the magnetic core and the magnet.
  • the axis of the ring magnet coincides with the axis of the magnetic core.
  • the driving assembly may further include a magnetic core ring, and the magnetic core ring is sleeved on the magnetic core.
  • the magnetic core ring is made of a magnetically conductive material, and the magnetic core ring plays a concentrated role on the magnetic field generated by the magnetic core.
  • the magnetic core ring may be sleeved on the top or bottom of the magnetic core, so that the magnetic field generated by the magnetic core and the coil is concentrated around, thereby increasing the strength of the magnetic field between the magnetic core and the magnet, Increase the magnetic force generated between the two.
  • the coil 21 is wound around the area of the magnetic core 23 close to the screen 11, and the magnetic core ring 24 is sleeved on the magnetic core 23 away from The area of the screen 11 is described.
  • the magnetic core ring 24 is in contact with the coil 21, thereby improving the magnetic permeability of the magnetic core ring 24.
  • the magnetic core ring 24 can enhance the strength of the magnetic field between the magnetic core 23 and the magnet 22.
  • the magnetic core ring 24 can also concentrate the magnetic field generated by the magnet 22 to the area where the magnetic core 23 is located. The magnetic field generated by the magnet 22 can be introduced into the magnetic core 23.
  • the magnetic field of the magnet 22 passes through the coil 21, so that an ampere force can be generated between the magnet 22 and the coil 21. That is, the relative driving force and vibration force between the magnetic core 23 and the magnet 22 can be strengthened by increasing the ampere force in addition to the above-mentioned magnetic force. Under the combined action of magnetic force and ampere force, the vibration sensitivity and amplitude of the screen relative to the fixed part can be strengthened, and the acoustic performance is significantly improved. By providing a magnetic core ring on the magnetic core, an ampere force can be generated between the magnet and the magnetic core, thereby enhancing the vibration effect.
  • the fixing member may be a plate-like structure having an opening 121 through which the magnetic core and the coil pass.
  • the magnetic core 23 is disposed on the screen 11
  • the magnet 22 is disposed on the fixing member 12.
  • the fixing member 12 has an opening 121 at a position facing the magnetic core 23 and the coil 21.
  • the magnet 22 may be disposed around the opening 121.
  • the driving assembly may further include a magnetic conductive plate, and the magnetic conductive plate may be attached to the magnet to form a convergent and concentrated effect on the magnetic field generated by the magnet.
  • a magnetic conductive plate 26 may be provided between the magnet 22 and the fixing member 12. By providing the magnetic conductive plate 26, the magnetic field generated by the magnet 22 can be concentrated in a direction closer to the magnetic core, thereby increasing the strength of the magnetic field and increasing the magnetic force generated between the magnet 22 and the magnetic core 23.
  • the magnetic conducting plate 26 is preferably disposed on the side of the magnet 22 away from the magnetic core 23 or other surface not facing the magnetic core 23.
  • the driving assembly further includes a circuit board.
  • the circuit board is electrically connected to the coil, and is used to transmit electrical signals, so that a magnetic force can be formed between the magnetic core and the magnet.
  • the circuit board is preferably disposed on the same component of the vibration assembly as the coil. As shown in FIG. 3, the circuit board 25 is attached to the inner surface of the screen 11, and the magnetic core and the coil are also fixedly connected to the inner surface of the screen 11.
  • the invention also provides an electronic product.
  • the electronic product includes the above-mentioned screen vibration sounding device and product main body.
  • the electronic product may be a mobile phone or a tablet computer, etc.
  • the present invention does not limit this.
  • the screen is set on the product body and serves as a display screen of electronic products.
  • the screen may be provided in a form where one end is rotatably connected to the main body of the product and the other end is freely movable; or, the screen may be made of a material with good elastic deformation ability, and the screen is fixedly connected to other fixed parts with one end
  • the upper and the other end can be set in a freely movable form. In this way, the screen can generate vibrations relative to the product body.
  • a part of the structure of the product body may serve as the fixing member, and the driving assembly is disposed in the product body.
  • the magnet 22 is fixedly arranged on a part of the product body equivalent to the fixing member 12, and the magnetic core 23 is fixedly arranged on the screen 11.
  • the magnetic force generated by the driving component can drive the screen to vibrate and sound. Since the electronic product provided by the present invention adopts the screen vibration sound-generating device provided by the present invention, it takes up less space in the direction parallel to the thickness of the screen of the electronic product, which is more conducive to designing the electronic product thinner and satisfying the electronic product Thin and light design requirements. On the other hand, the design method of directly driving the screen vibration saves the shrapnel, shell and other parts, simplifies the processing and assembly process of the product, and reduces the cost.
  • the fixing part may be a structure such as a middle frame or a side wall in the product body.
  • the product body in order to place other electronic devices, the product body is often equipped with structural components such as partitions, middle frames, etc. These structural components have good structural stability in electronic products. On the one hand, they are used for electronic devices in the case, on the other hand Used to protect electronic devices. Therefore, using such structural members in the product body as the fixing portion can improve the conversion rate of the ampere force into vibration, and improve the vibration reliability.
  • the inner surface of the side wall of the product body may also serve as the fixing portion.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

L'invention concerne un appareil de production de sons de vibration d'écran et un produit électronique. L'appareil de production de son de vibration d'écran comprend : un ensemble de vibration, l'ensemble de vibration comprenant un écran et une pièce fixe, l'écran étant configuré pour vibrer par rapport à la pièce fixe; un ensemble d'entraînement, l'ensemble d'entraînement comprenant un noyau magnétique, une bobine et un aimant, la bobine étant enroulée sur le noyau magnétique, l'aimant étant relié de manière fixe à l'un de l'écran et de la pièce fixe, le noyau magnétique et la bobine étant reliés de manière fixe à l'un de l'écran et de la pièce fixe n'étant pas reliée de manière fixe à l'aimant, un axe du noyau magnétique étant perpendiculaire à une surface de l'écran, l'aimant étant situé à une position adjacente au noyau magnétique sur la direction radiale du noyau magnétique, la direction du pôle magnétique de l'aimant étant perpendiculaire à la surface de l'écran, la bobine étant configurée pour transmettre un signal de courant alternatif, de telle sorte que le noyau magnétique génère des pôles magnétiques perpendiculaires à la surface de l'écran, de telle sorte qu'une force magnétique est générée entre le noyau magnétique et l'aimant dans la direction perpendiculaire à la surface de l'écran. Le signal de courant alternatif passant à travers la bobine amène les pôles magnétiques générés par le noyau magnétique à s'inverser alternativement, de telle sorte que la direction de la force magnétique s'inverse alternativement. L'ensemble de vibration est soumis à la force magnétique alternative transmise par l'ensemble d'entraînement, de telle sorte que l'écran vibre par rapport à la pièce fixe et produit un son.
PCT/CN2019/127256 2018-12-24 2019-12-23 Appareil de production de sons de vibration d'écran et produit électronique WO2020135289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201822184093.4 2018-12-24
CN201822184093.4U CN209057363U (zh) 2018-12-24 2018-12-24 屏幕振动发声装置和电子产品

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209057363U (zh) * 2018-12-24 2019-07-02 歌尔科技有限公司 屏幕振动发声装置和电子产品
CN110166904B (zh) * 2019-06-12 2020-08-18 瑞声科技（南京）有限公司 屏幕发声装置
CN111918183B (zh) * 2020-07-29 2022-06-07 合肥维信诺科技有限公司 屏幕发声驱动结构及显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110249858A1 (en) * 2009-05-12 2011-10-13 Bse Co., Ltd. Multifunctional micro speaker
CN203661283U (zh) * 2013-12-13 2014-06-18 瑞声光电科技(常州)有限公司 电磁驱动装置
CN107257190A (zh) * 2017-08-11 2017-10-17 歌尔股份有限公司 线性振动马达
CN209057363U (zh) * 2018-12-24 2019-07-02 歌尔科技有限公司 屏幕振动发声装置和电子产品

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110249858A1 (en) * 2009-05-12 2011-10-13 Bse Co., Ltd. Multifunctional micro speaker
CN203661283U (zh) * 2013-12-13 2014-06-18 瑞声光电科技(常州)有限公司 电磁驱动装置
CN107257190A (zh) * 2017-08-11 2017-10-17 歌尔股份有限公司 线性振动马达
CN209057363U (zh) * 2018-12-24 2019-07-02 歌尔科技有限公司 屏幕振动发声装置和电子产品

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