WO2020077844A1 - 电磁激励器以及屏幕发声装置 - Google Patents

电磁激励器以及屏幕发声装置 Download PDF

Info

Publication number
WO2020077844A1
WO2020077844A1 PCT/CN2018/123670 CN2018123670W WO2020077844A1 WO 2020077844 A1 WO2020077844 A1 WO 2020077844A1 CN 2018123670 W CN2018123670 W CN 2018123670W WO 2020077844 A1 WO2020077844 A1 WO 2020077844A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
metal block
vibrator
elastic
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/123670
Other languages
English (en)
French (fr)
Inventor
刘春发
朱跃光
毛东升
臧玮晔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
Original Assignee
Goertek Inc
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 Goertek Inc filed Critical Goertek Inc
Publication of WO2020077844A1 publication Critical patent/WO2020077844A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers

Definitions

  • the utility model relates to the technical field of electroacoustic conversion, and more specifically, to an electromagnetic exciter and a screen sounding device.
  • the screen sounding device In order to increase the screen ratio of mobile phones and other electronic products (that is, the ratio of screen area to frontal area), the cancellation of the earpiece has become a development trend.
  • a screen sounding device is used instead of the earpiece.
  • the screen sounding device generally includes a screen body and an electromagnetic actuator provided on the screen body. The electromagnetic exciter vibrates, which causes the screen body to vibrate to make a sound.
  • Existing electromagnetic exciters usually include a stator, a vibrator, and a shrapnel.
  • the stator includes a housing and a coil.
  • the vibrator includes a permanent magnet and a mass connected together. The vibrator is suspended in the cavity of the housing through the elastic sheet. The coil is fixed on the inner wall of the housing.
  • one or two permanent magnets are usually provided.
  • mass blocks have to be provided, such as tungsten steel blocks.
  • Permanent magnets are embedded in tungsten steel blocks. Tungsten steel block and shrapnel welding.
  • the volume of the permanent magnet cannot be made larger, resulting in a reduction in the driving force of the vibrator, a slow start-up speed, and a decrease in the sensitivity of the electromagnetic actuator.
  • An object of the utility model is to provide a new technical solution for an electromagnetic actuator.
  • an electromagnetic actuator includes: a stator assembly, the stator assembly includes a housing and a coil, a cavity is formed inside the housing, the coil is disposed in the cavity, and a vibrator assembly, the vibrator assembly is stacked together Composed of a plurality of permanent magnets, the magnetic field lines of the plurality of permanent magnets are configured to be connected with each other to jointly form a magnetic circuit, and the polarities of the two permanent magnets at the two ends of the vibrator assembly in the vibration direction Pointing to the coil and having opposite polarities, the vibrator assembly cooperates with the coil; and an elastic element, the vibrator assembly and the elastic element are directly connected and suspended in the cavity.
  • the elastic element includes an elastic body and a connecting element, the connecting element is a metal material, one end of the elastic body is welded to the connecting element, and the other end is connected to the housing, the connecting element It is directly connected to the vibrator assembly.
  • the vibrator assembly includes a first permanent magnet, a second permanent magnet, and a third permanent magnet stacked together.
  • the third permanent magnet is located between the first permanent magnet and the second permanent magnet.
  • the magnetization directions of the first permanent magnet and the second permanent magnet are perpendicular to the vibration direction and the magnetization directions are opposite, and the magnetization direction of the third permanent magnet is parallel to the vibration direction to form the magnetic circuit.
  • one end of the vibrator assembly along the long axis and perpendicular to the vibration direction is a first end, and the other end is a second end.
  • the elastic element includes a first elastic element and a second elastic element. The elastic element and the second elastic element are respectively located on the upper and lower sides of the vibrator assembly along the vibration direction.
  • the first elastic element includes a first elastic body and a first metal block
  • the second elastic element includes a first Two elastic bodies and a second metal block
  • the first permanent magnet is subjected to material removal treatment at the first end to form a first gap
  • the first metal block is fixed in the first gap
  • the first The two permanent magnets are material-removed at the second end to form a second notch
  • the second metal block is fixed in the second notch.
  • the first permanent magnet and the third permanent magnet are misaligned to form the first gap, and the first metal block is bonded to the first permanent magnet and the third permanent magnet On at least one of the magnets; and / or
  • the second permanent magnet and the third permanent magnet are arranged offset to form the second notch, and the second metal block is bonded to at least the second permanent magnet and the third permanent magnet One on.
  • the upper surface of the first metal block is flush with the upper surface of the first permanent magnet
  • the lower surface of the second metal block is flush with the lower surface of the second permanent magnet
  • the One end of the first elastic body is welded to the upper surface of the first metal block
  • one end of the second elastic body is welded to the lower surface of the second metal block.
  • the housing includes a top wall and a bottom wall that are oppositely arranged in the vibration direction, a boss protruding toward the cavity is provided on the top wall, and the other end of the first elastic body Be fixed on the boss; and / or
  • a boss projecting toward the cavity is provided on the bottom wall, and the other end of the second elastic body is fixed on the boss.
  • the housing includes a side wall parallel to the vibration direction, the side wall includes a long side and a short side connected together, and the coil is disposed on the long side.
  • a plurality of vibrator assemblies are included, and the number of the vibrator assemblies is one more than the number of the coils, and the vibrator assemblies and the coils are alternately arranged.
  • a plurality of coils are included, the number of the coils is one more than the number of the vibrator assemblies, and the coils and the vibrator assemblies are alternately arranged.
  • a screen sounding device includes a screen body and the above-mentioned electromagnetic exciter, and the electromagnetic exciter is provided on the screen body.
  • the electromagnetic exciter is provided on the screen body through an elastic buffer element.
  • the vibration excitation experience of the electromagnetic exciter is good, and the vibration sensitivity is high.
  • FIG. 1 is an exploded view of an electromagnetic exciter according to an embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view of an electromagnetic exciter according to an embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view of an electromagnetic exciter at another angle according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of an electromagnetic exciter according to an embodiment of the present disclosure.
  • 11 upper shell; 12: middle shell; 13: first shrapnel; 14: first metal block; 15: second shrapnel; 16: second metal block; 17: first permanent magnet; 18: second permanent magnet; 19: third permanent magnet; 20: coil; 21: FPCB; 22: lower shell; 23: first end; 24: second end; 25: long side; 26: short side; 27: first notch; 28: The second gap.
  • an electromagnetic exciter As shown in FIG. 1, the exciter includes a stator assembly, a vibrator assembly, and an elastic element.
  • the stator assembly includes a housing and coil 20.
  • the interior of the housing forms a cavity.
  • the coil 20 is provided in the cavity.
  • the casing has a rectangular parallelepiped structure.
  • the shell includes an upper shell 11, a middle shell 12 and a lower shell 22 that are snapped together. Form cavities inside them.
  • the middle shell 12 includes a top wall, a bottom wall, and two oppositely disposed side walls connecting the top wall and the bottom wall.
  • the top and bottom walls are long sides 25.
  • the two side walls are short sides 26.
  • Both the upper shell 11 and the lower shell 22 have long sides 25.
  • the upper shell 11 and the lower shell 22 serve as two other opposite side walls.
  • the long side 25 has a greater length than the short side 26.
  • the coil 20 is adhered to the lower case 22 by glue.
  • the coil 20 is electrically connected to an external circuit through the FPCB21.
  • the coil 20 has a flat structure to save space inside the cavity.
  • the vibrator assembly is composed of multiple permanent magnets stacked together.
  • the permanent magnets are ferrite magnets or neodymium iron boron magnets.
  • a plurality of permanent magnets cooperate with the coil 20.
  • the magnetic lines of multiple permanent magnets can be connected to each other to form a magnetic circuit.
  • the polarities of the two permanent magnets respectively located at the two ends of the vibrator assembly in the vibration direction point to the coil 20 and have opposite polarities. In this way, the magnetic induction strength of the vibrator assembly can be effectively improved.
  • the vibrator assembly and the coil 20 cooperate with each other to vibrate. That is, the coil 20 is subjected to electromagnetic force after being energized.
  • the vibrator assembly receives the reaction force of the coil 20 to generate vibration.
  • the vibrator assembly includes a first permanent magnet 17, a second permanent magnet 18, and a third permanent magnet 19 stacked together.
  • the third permanent magnet 19 is located between the first permanent magnet 17 and the second permanent magnet 18.
  • the magnetization directions of the first permanent magnet 17 and the second permanent magnet 18 are perpendicular to the vibration direction and the magnetization directions are opposite.
  • the magnetization direction of the third permanent magnet 19 is parallel to the vibration direction to form a magnetic circuit.
  • the vibrator assembly composed of the three permanent magnets has high magnetic induction strength. The direction of vibration is shown by arrow A in Figure 2.
  • the number of permanent magnets and the stacking method are not limited to the above embodiments, as long as they can form a magnetic circuit.
  • a person skilled in the art can set the position of the coil 20 according to actual needs, so as to facilitate cooperation with the vibrator assembly.
  • the side wall of the housing is parallel to the vibration direction.
  • the side wall includes a long side 25 and a short side 26 connected together.
  • the coil 20 is provided on the long side 25, for example, on the lower case 22.
  • the long axis of the coil 20 is parallel to the long side 25. This arrangement makes the area where the coil 20 interacts with the vibrator assembly larger, and the driving force of the vibrator assembly greater.
  • the space occupied by the coil 20 is small.
  • the vibrator assembly is directly connected with the elastic element and suspended in the cavity.
  • Direct connection means that the elastic element is in direct contact with the permanent magnet and forms a connection.
  • the elastic element is used to provide elastic restoring force to the vibrator assembly.
  • the elastic element includes an elastomer.
  • the elastic body may be an elastic material, such as rubber, silicone, etc .; or it may be an elastic structure, such as a straight arm, U-shaped, or Z-shaped metal dome.
  • the elastic element is directly connected to at least one of the plurality of permanent magnets by means of bonding, snapping, riveting, bolting, etc.
  • the vibrator assembly is composed of a plurality of permanent magnets stacked together.
  • the vibrator assembly has no weights.
  • the weight of the multiple permanent magnets serves as the counterweight of the vibrator assembly.
  • the volume of the permanent magnet can be effectively increased, so that the magnetic induction strength of the vibrator assembly is effectively improved.
  • the driving force of the electromagnetic actuator of the same volume is effectively improved.
  • the vibration speed of the vibrator assembly is effectively accelerated.
  • the sensitivity of the electromagnetic actuator is significantly improved.
  • multiple permanent magnets together form a magnetic circuit, which improves the magnetic induction strength, which makes the driving force of the electromagnetic exciter further increase.
  • the elastic element includes an elastic body and a connecting element provided at one end of the elastic body.
  • the other end of the elastic body is connected to the housing.
  • the connecting element is directly connected to the vibrator assembly.
  • the connecting element is made of metal.
  • One end of the elastic body is welded to the connecting element.
  • the elastic body is an elastic piece, that is, a first elastic piece 13 and a second elastic piece 15.
  • the area of the shrapnel used for connection is usually small.
  • the elastic body and the permanent magnet are connected by means of bonding, and the binding force between the two is small, and the shrapnel is prone to fall off.
  • the connecting element is a metallic material.
  • the connecting element is a metal block. Welding is used to weld the shrapnel to the metal block, which greatly improves the connection strength of the two. Since the metal block can be set to have a larger area according to actual needs, it can be bonded with the permanent magnet in a bonding manner. The connecting element can significantly improve the connection strength of the elastic element and the vibrator assembly.
  • the weight of the connecting element should be as light as possible to avoid affecting the weight of the vibrator assembly.
  • one end of the vibrator assembly along the long axis and perpendicular to the vibration direction is the first end 23, and the other end is the second end 24.
  • the long axis is parallel to the long side 25 of the housing.
  • the elastic element includes a first elastic element and a second elastic element. The first elastic element and the second elastic element are respectively located on the upper and lower sides of the vibrator assembly in the vibration direction. This arrangement makes the resilience of the vibrator assembly more balanced.
  • the first elastic element includes a first elastic body and a first metal block 14.
  • the second elastic element includes a second elastic body and a second metal block 16.
  • the first permanent magnet 17 is blanked at the first end 23 to form a first notch 27.
  • the first metal block 14 is fixed in the first notch 27.
  • bonding by glue for example, bonding by glue.
  • the second permanent magnet 18 is blanked at the second end 24 to form a second notch 28, and the second metal block 16 is fixed in the second notch 28. For example, bonding by glue.
  • the space occupied by the metal block can be effectively reduced, which makes the vibration margin of the vibrator assembly larger.
  • the amplitude of the electromagnetic exciter is larger and the vibration feeling is stronger.
  • the first notch 27 and the second notch 28 may be formed on the first permanent magnet 17 and the second permanent magnet 18, respectively.
  • the first permanent magnet 17 and the third permanent magnet 19 are arranged offset to form the first notch 27.
  • the first metal block 14 is bonded to at least one of the first permanent magnet 17 and the third permanent magnet 19.
  • the second permanent magnet 18 and the third permanent magnet 19 are arranged offset to form a second notch 28.
  • the second metal block 16 is bonded to at least one of the second permanent magnet 18 and the third permanent magnet 19.
  • the notch is formed by setting the length of three permanent magnets.
  • all three permanent magnets are bar magnets.
  • the length of the third permanent magnet 19 is greater than the respective lengths of the first permanent magnet 17 and the second permanent magnet 18. It is equivalent to the first permanent magnet 17 and the second permanent magnet 18 being subjected to material removal treatment to form a shorter length.
  • Three permanent magnets are staggered at the first end 23 and the second end 24, respectively, to form a first notch 27 and a second notch 28.
  • the structure of the three permanent magnets is simple. This makes the processing of the vibrator assembly easy and the yield is high.
  • the upper surface of the first metal block 14 is flush with the upper surface of the first permanent magnet 17.
  • the lower surface of the second metal block 16 is flush with the lower surface of the second permanent magnet 18.
  • One end of the first elastic body is welded to the upper surface of the first metal block.
  • One end of the second elastic body is welded to the lower surface of the second metal block.
  • the thickness of the first metal block 14 is equal to the thickness of the first permanent magnet 17.
  • the first metal block 14 just fills the first gap 27.
  • the thickness of the second metal block 16 is equal to the thickness of the second permanent magnet 18.
  • the second metal block 16 just fills the second gap 28.
  • the shrapnel is directly connected to the inner wall of the housing.
  • one end of the shrapnel is welded to the inner wall of the housing by welding.
  • the vibrator assembly easily collides with the sound of the housing, thereby forming noise.
  • a boss projecting toward the cavity is provided on the top wall.
  • the other end of the first elastic body is fixed on the boss.
  • a boss projecting toward the cavity is provided on the bottom wall.
  • the other end of the second elastic body is fixed on the boss.
  • bosses are formed in the middle of the two long sides 25 of the middle case 12, respectively.
  • the first elastic piece 13 and the second elastic piece 15 are welded to the two bosses respectively.
  • the boss and the corresponding other part of the inner wall form a height difference.
  • the height difference provides space for the vibration of the vibrator assembly. This method can effectively reduce the probability of collision between the vibrator assembly and the housing.
  • the electromagnetic exciter includes multiple vibrator assemblies.
  • the number of vibrator assemblies is one more than the number of coils 20.
  • the vibrator assembly and the coil 20 are alternately arranged.
  • the electromagnetic exciter includes a plurality of coils 20.
  • the number of coils 20 is one more than the number of vibrator assemblies.
  • the coil 20 and the vibrator assembly are alternately arranged. The above setting method can significantly improve the vibration sensing experience of the electromagnetic actuator.
  • a screen sounding device includes a screen body and the above-mentioned electromagnetic actuator.
  • the electromagnetic actuator is provided on the screen body.
  • the screen sounding device has the characteristics of high sensitivity, loudness and good sounding effect.
  • the electromagnetic actuator is provided on the screen body through the elastic buffer element.
  • the elastic buffer element may be foam, sponge, rubber, silicone, plastic and other elastic materials. The elastic buffer element can effectively buffer the impact of the electromagnetic exciter on the screen body and improve the durability of the screen sounding device.
  • the elastic buffer element can play a role of heat insulation, which can prevent the heat of the electromagnetic actuator from being transmitted to the screen body, causing burns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

一种电磁激励器以及屏幕发声装置。该激励器包括：定子组件，定子组件包括壳体和线圈(20)，壳体的内部形成腔体，线圈(20)被设置在腔体内；振子组件，振子组件由堆叠在一起的多个永磁体构成，多个永磁体的磁力线能够相互衔接，以共同构成磁回路，分别位于振子组件的沿振动方向的两个端部的两个永磁体的极性指向线圈(20)，并且极性相反，振子组件与线圈(20)相配合；以及弹性元件，振子组件与弹性元件直接连接，并且悬置在腔体内。

Description

电磁激励器以及屏幕发声装置 技术领域
本实用新型涉及电声转换技术领域，更具体地，涉及一种电磁激励器以及屏幕发声装置。
背景技术
为了提高手机等电子产品的屏占比(即屏幕面积与正面面积之比)，取消听筒成为了一种发展趋势。在一些方案中，采用屏幕发声装置来代替听筒。屏幕发声装置通常包括屏幕本体和设置在屏幕本体上的电磁激励器。电磁激励器发生振动，从而带动屏幕本体振动以发出声音。
现有的电磁激励器通常包括定子、振子和弹片。定子包括壳体和线圈。振子包括连接在一起的永磁体和质量块。振子通过弹片悬置在外壳的腔体中。线圈固定在外壳的内壁上。
在这种结构中，永磁体通常设置一个或两个。为了提高振子的质量不得不设置质量块，例如钨钢块等。永磁体嵌入钨钢块中。钨钢块与弹片焊接。
由于钨钢块占据了一定体积，使得永磁体的体积无法做的更大，从而造成振子的驱动力降低，起振速度慢，电磁激励器的灵敏度降低。
因此，需要提供一种新的技术方案，以解决上述技术问题。
实用新型内容
本实用新型的一个目的是提供一种电磁激励器的新技术方案。
根据本实用新型的第一方面，提供了一种电磁激励器。该激励器包括：定子组件，所述定子组件包括壳体和线圈，所述壳体的内部形成腔体，所述线圈被设置在所述腔体内；振子组件，所述振子组件由堆叠在一起的多个永磁体构成，多个所述永磁体的磁力线被配置为相互衔接，以共同构成 磁回路，分别位于所述振子组件的沿振动方向的两个端部的两个永磁体的极性指向所述线圈，并且极性相反，所述振子组件与所述线圈相配合；以及弹性元件，所述振子组件与所述弹性元件直接连接，并且悬置在所述腔体内。
可选地，所述弹性元件包括弹性体和连接元件，所述连接元件为金属材料，所述弹性体的一端与所述连接元件焊接连接，另一端与所述壳体连接，所述连接元件与所述振子组件直接连接。
可选地，所述振子组件包括堆叠在一起的第一永磁体、第二永磁体和第三永磁体，所述第三永磁体位于所述第一永磁体和第二永磁体之间，所述第一永磁体和所述第二永磁体的充磁方向垂直于振动方向且充磁方向相反，所述第三永磁体的充磁方向平行于振动方向，以形成所述磁回路。
可选地，计所述振子组件沿长轴且垂直于振动方向的一端为第一端，另一端为第二端，所述弹性元件包括第一弹性元件和第二弹性元件，所述第一弹性元件和所述第二弹性元件分别位于所述振子组件的沿振动方向的上、下侧，所述第一弹性元件包括第一弹性体和第一金属块，所述第二弹性元件包括第二弹性体和第二金属块，所述第一永磁体在所述第一端做去料处理以形成第一缺口，所述第一金属块被固定在所述第一缺口中，所述第二永磁体在所述第二端做去料处理以形成第二缺口，所述第二金属块被固定在所述第二缺口中。
可选地，所述第一永磁体与所述第三永磁体错位设置，以形成所述第一缺口，所述第一金属块被粘结在所述第一永磁体和所述第三永磁体中的至少一个上；和/或
所述第二永磁体与所述第三永磁体错位设置，以形成所述第二缺口，所述第二金属块被粘结在所述第二永磁体和所述第三永磁体中的至少一个上。
可选地，所述第一金属块的上表面与所述第一永磁体的上表面平齐，所述第二金属块的下表面与所述第二永磁体的下表面平齐，所述第一弹性体的一端被焊接在所述第一金属块的上表面上，所述第二弹性体的一端被焊接在所述第二金属块的下表面上。
可选地，所述壳体包括在振动方向上相对设置的顶壁和底壁，在所述顶壁上设置有向所述腔体凸出的凸台，所述第一弹性体的另一端被固定在所述凸台上；和/或
在所述底壁上设置有向所述腔体凸出的凸台，所述第二弹性体的另一端被固定在所述凸台上。
可选地，所述壳体包括平行于振动方向的侧壁，所述侧壁包括连接在一起的长边和短边，所述线圈被设置在所述长边上。
可选地，包括多个振子组件，所述振子组件的数量比所述线圈的数量多一个，所述振子组件与所述线圈交替设置。
可选地，包括多个线圈，所述线圈的数量比所述振子组件的数量多一个，所述线圈与所述振子组件交替设置。
根据本公开的第二方面，提供了一种屏幕发声装置。该装置包括屏幕本体和上述电磁激励器，所述电磁激励器被设置在所述屏幕本体上。
可选地，所述电磁激励器通过弹性缓冲元件被设置在所述屏幕本体上。
根据本公开的一个实施例，该电磁激励器的振感体验好，振动灵敏度高。
通过以下参照附图对本实用新型的示例性实施例的详细描述，本实用新型的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本实用新型的实施例，并且连同其说明一起用于解释本实用新型的原理。
图1是根据本公开的一个实施例的电磁激励器的分解图。
图2是根据本公开的一个实施例的电磁激励器的剖视图。
图3是根据本公开的一个实施例的另一个角度的电磁激励器的剖视图。
图4是根据本公开的一个实施例的电磁激励器的原理图。
附图标记说明：
11：上壳；12：中壳；13：第一弹片；14：第一金属块；15：第二弹片；16：第二金属块；17：第一永磁体；18：第二永磁体；19：第三永磁体；20：线圈；21：FPCB；22：下壳；23：第一端；24：第二端；25：长边；26：短边；27：第一缺口；28：第二缺口。
具体实施方式
现在将参照附图来详细描述本实用新型的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本实用新型的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本实用新型及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开的一个实施例，提供了一种电磁激励器。如图1所示，该激励器包括定子组件、振子组件和弹性元件。
定子组件包括壳体和线圈20。壳体的内部形成腔体。线圈20被设置在腔体内。
如图1所示，壳体呈长方体结构。壳体包括扣合在一起的上壳11、中壳12和下壳22。在它们内部形成腔体。中壳12包括顶壁、底壁和连接顶壁和底壁的两个相对设置的侧壁。顶壁和底壁为长边25。两个侧壁为短边26。上壳11和下壳22均为长边25。上壳11和下壳22作为另两个相对设置的侧壁。长边25比短边26具有更大的长度。
线圈20通过胶粘结在下壳22。线圈20通过FPCB21与外部电路电连 接。例如，线圈20呈扁平结构，以节省腔体内部的空间。
如图4所示，振子组件由堆叠在一起的多个永磁体构成。永磁体为铁氧体磁铁或者钕铁硼磁铁等。多个永磁体与线圈20相配合。多个永磁体的磁力线能够相互衔接，以共同构成磁回路。分别位于振子组件的沿振动方向的两个端部的两个永磁体的极性指向线圈20，并且极性相反。通过这种方式，能够有效地提高振子组件的磁感强度。振子组件与线圈20相互配合，以进行振动。即线圈20在通电后受到电磁力的作用。振子组件收到线圈20的反作用力的作用从而产生振动。
在一个例子中，如图1-4所示，振子组件包括堆叠在一起的第一永磁体17、第二永磁体18和第三永磁体19。第三永磁体19位于第一永磁体17和第二永磁体18之间。第一永磁体17和第二永磁体18的充磁方向垂直于振动方向且充磁方向相反。第三永磁体19的充磁方向平行于振动方向，以形成磁回路。该三个永磁体构成的振子组件磁感强度高。振动方向如图2中A箭头所示。
当然，永磁体的数量以及堆叠方式不限于上述实施例，只要能够形成磁回路即可。本领域技术人员可以根据实际需要设置线圈20的位置，以便于与振子组件进行配合。
例如，壳体的侧壁平行于振动方向。侧壁包括连接在一起的长边25和短边26。线圈20被设置在长边25上，例如，下壳22上。线圈20的长轴平行于长边25。这种设置方式使得线圈20与振子组件相互作用的面积更大，振子组件的驱动力更大。
此外，线圈20占据的空间小。
振子组件与弹性元件直接连接，并且悬置在腔体内。直接连接是指弹性元件与永磁体直接接触并形成连接。弹性元件用于向振子组件提供弹性回复力。例如，弹性元件包括弹性体。弹性体可以是自身为具有弹性的材料，例如橡胶、硅胶等；也可以是，弹性体为具有弹性的结构，例如直臂形、U形、Z形的金属弹片等。通过粘结、卡接、铆接、螺栓连接等方式将弹性元件与多个永磁体中的至少一个直接连接。
在本公开实施例中，振子组件由堆叠在一起的多个永磁体构成。该振 子组件未设置配重块。多个永磁体的重量充当振子组件的配重。这样，能够有效地增大永磁体的体积，使得振子组件的磁感强度有效地提高。相同体积的电磁激励器的驱动力有效地提高。振子组件的起振速度有效地加快。电磁激励器的灵敏度显著提高。
此外，多个永磁体共同构成磁回路，提高了磁感强度，这使得电磁激励器的驱动力进一步提高。
此外，由于不需要设置配重块，省去了永磁体与配重块的装配工序，故使得电磁激励器的装配变得简单。
在一个例子中，如图1和3所示，弹性元件包括弹性体和设置在弹性体的一端的连接元件。弹性体的另一端与壳体连接。连接元件与振子组件直接连接。连接元件为金属材料。弹性体的一端与连接元件焊接连接。
例如，弹性体为弹片，即第一弹片13和第二弹片15。弹片的用于连接的部位通常面积较小。采用粘结的方式将弹性体与永磁体连接，二者之间的结合力小，容易发生弹片脱落。
此外，由于永磁体的材质所限，并且高温会影响永磁体的磁性，故通常不能将弹片直接焊接到永磁体上。
在该例子中，连接元件为金属材料。例如，连接元件为金属块。采用焊接的方式将弹片焊接在金属块上，这使得二者的连接强度大大提高。由于金属块可以根据实际需要被设置成具有较大的面积，故可以采用粘结的方式与永磁体粘结在一起。连接元件能够显著提高弹性元件与振子组件的连接强度。
需要说明的是，由于连接元件本身不作为配重块，故连接元件的重量应尽量地轻，以避免对振子组件的重量造成影响。
在一个例子中，如图3所示，计振子组件沿长轴且垂直于振动方向的一端为第一端23，另一端为第二端24。长轴平行于壳体的长边25。弹性元件包括第一弹性元件和第二弹性元件。第一弹性元件和第二弹性元件分别位于振子组件的沿振动方向的上、下侧。这种设置方式使得振子组件受到的弹性回复力更均衡。
第一弹性元件包括第一弹性体和第一金属块14。第二弹性元件包括第 二弹性体和第二金属块16。第一永磁体17在第一端23做去料处理以形成第一缺口27。第一金属块14被固定在第一缺口27中。例如，通过胶进行粘结。第二永磁体18在第二端24做去料处理以形成第二缺口28，第二金属块16被固定在第二缺口28中。例如，通过胶进行粘结。
通过将金属块固定在相应地缺口中的方式，能够有效地减小金属块占用的空间，这使得振子组件的振动余量更大。电磁激励器的振幅更大，振感更强。
第一缺口27和第二缺口28可以是分别形成在第一永磁体17和第二永磁体18上。
也可以是，例如，如图3所示，第一永磁体17与第三永磁体19错位设置，以形成第一缺口27。第一金属块14被粘结在第一永磁体17和第三永磁体19中的至少一个上。
和/或
第二永磁体18与第三永磁体19错位设置，以形成第二缺口28。第二金属块16被粘结在第二永磁体18和第三永磁体19中的至少一个上。
在该例子中，通过设置三个永磁体的长度来形成缺口。例如，如图3所示，三个永磁体均为条形磁铁。第三永磁体19的长度大于第一永磁体17和第二永磁体18各自的长度。相当于第一永磁体17和第二永磁体18做去料处理，以形成较短的长度。三个永磁体在第一端23和第二端24分别交错设置，以形成第一缺口27和第二缺口28。相比于在第一永磁体17和第二永磁体18上做去料处理，以形成第一缺口27和第二缺口28的方式，在这种方式中，三个永磁体的结构简单。这使得振子组件的加工制作容易，成品率高。
在一个例子中，如图3所示，第一金属块14的上表面与第一永磁体17的上表面平齐。第二金属块16的下表面与第二永磁体18的下表面平齐。第一弹性体的一端被焊接在第一金属块的上表面上。第二弹性体的一端被焊接在第二金属块的下表面上。
例如，第一金属块14的厚度与第一永磁体17的厚度相等。第一金属块14正好填充在第一缺口27中。第二金属块16的厚度与第二永磁体18 的厚度相等。第二金属块16正好填充在第二缺口28中。这种设置方式使得振子组件与弹性元件的连接结构更加规整，充分利用了腔体内部的空间，振动效果更加优良。
在通常情况下，弹片与壳体的内壁直接连接。例如，采用焊接的方式将弹片的一端焊接在壳体的内壁上。在振动时，振子组件容易与壳体发声碰撞，从而形成杂音。
在一个例子中(未示出)，在顶壁上设置有向腔体凸出的凸台。第一弹性体的另一端被固定在凸台上。
和/或
在底壁上设置有向腔体凸出的凸台。第二弹性体的另一端被固定在凸台上。
例如，在中壳12的两个长边25的中部分别形成凸台。第一弹片13和第二弹片15分别焊接在两个凸台上。在振动时凸台与相对应的内壁的其他部位形成高度差。高度差为振子组件的振动提供了空间。这种方式能够有效地降低振子组件与壳体的碰撞几率。
在一个例子中，电磁激励器包括多个振子组件。振子组件的数量比线圈20的数量多一个。振子组件与线圈20交替设置。
还可以是，电磁激励器包括多个线圈20。线圈20的数量比振子组件的数量多一个。线圈20与振子组件交替设置。上述设置方式能够显著提升电磁激励器的振感体验。
本领域技术人员可以根据实际需要选择线圈20和振子组件的数量。
根据本公开的另一个实施例，提供了一种屏幕发声装置。该装置包括屏幕本体和上述的电磁激励器。电磁激励器被设置在屏幕本体上。
该屏幕发声装置具有灵敏度高，响度大，发声效果好的特点。
在一个例子中，电磁激励器通过弹性缓冲元件被设置在屏幕本体上。弹性缓冲元件可以是泡绵、海绵、橡胶、硅胶、塑料等具有弹性的材料。弹性缓冲元件能够有效地缓冲电磁激励器对屏幕本体的冲击，提高了屏幕发声装置的耐用性。
此外，弹性缓冲元件能够起到隔热的作用，能够防止电磁激励器的热 量传导至屏幕本体，造成灼伤。
虽然已经通过例子对本实用新型的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本实用新型的范围。本领域的技术人员应该理解，可在不脱离本实用新型的范围和精神的情况下，对以上实施例进行修改。本实用新型的范围由所附权利要求来限定。

Claims (12)

  1. 一种电磁激励器，其特征在于：包括：
    定子组件，所述定子组件包括壳体和线圈，所述壳体的内部形成腔体，所述线圈被设置在所述腔体内；
    振子组件，所述振子组件由堆叠在一起的多个永磁体构成，多个所述永磁体的磁力线被配置为相互衔接，以共同构成磁回路，分别位于所述振子组件的沿振动方向的两个端部的两个永磁体的极性指向所述线圈，并且极性相反，所述振子组件与所述线圈相配合；以及
    弹性元件，所述振子组件与所述弹性元件直接连接，并且悬置在所述腔体内。
  2. 根据权利要求1所述的电磁激励器，其特征在于：所述弹性元件包括弹性体和连接元件，所述连接元件为金属材料，所述弹性体的一端与所述连接元件焊接连接，另一端与所述壳体连接，所述连接元件与所述振子组件直接连接。
  3. 根据权利要求1所述的电磁激励器，其特征在于：所述振子组件包括堆叠在一起的第一永磁体、第二永磁体和第三永磁体，所述第三永磁体位于所述第一永磁体和第二永磁体之间，所述第一永磁体和所述第二永磁体的充磁方向垂直于振动方向且充磁方向相反，所述第三永磁体的充磁方向平行于振动方向，以形成所述磁回路。
  4. 根据权利要求3所述的电磁激励器，其特征在于：计所述振子组件沿长轴且垂直于振动方向的一端为第一端，另一端为第二端，所述弹性元件包括第一弹性元件和第二弹性元件，所述第一弹性元件和所述第二弹性元件分别位于所述振子组件的沿振动方向的上、下侧，所述第一弹性元件包括第一弹性体和第一金属块，所述第二弹性元件包括第二弹性体和第二金属块，所述第一永磁体在所述第一端做去料处理以形成第一缺口，所 述第一金属块被固定在所述第一缺口中，所述第二永磁体在所述第二端做去料处理以形成第二缺口，所述第二金属块被固定在所述第二缺口中。
  5. 根据权利要求4所述的电磁激励器，其特征在于：所述第一永磁体与所述第三永磁体错位设置，以形成所述第一缺口，所述第一金属块被粘结在所述第一永磁体和所述第三永磁体中的至少一个上；和/或
    所述第二永磁体与所述第三永磁体错位设置，以形成所述第二缺口，所述第二金属块被粘结在所述第二永磁体和所述第三永磁体中的至少一个上。
  6. 根据权利要求4或5所述的电磁激励器，其特征在于：所述第一金属块的上表面与所述第一永磁体的上表面平齐，所述第二金属块的下表面与所述第二永磁体的下表面平齐，所述第一弹性体的一端被焊接在所述第一金属块的上表面上，所述第二弹性体的一端被焊接在所述第二金属块的下表面上。
  7. 根据权利要求6所述的电磁激励器，其特征在于：所述壳体包括在振动方向上相对设置的顶壁和底壁，在所述顶壁上设置有向所述腔体凸出的凸台，所述第一弹性体的另一端被固定在所述凸台上；和/或
    在所述底壁上设置有向所述腔体凸出的凸台，所述第二弹性体的另一端被固定在所述凸台上。
  8. 根据权利要求1所述的电磁激励器，其特征在于：所述壳体包括平行于振动方向的侧壁，所述侧壁包括连接在一起的长边和短边，所述线圈被设置在所述长边上。
  9. 根据权利要求1所述的电磁激励器，其特征在于：包括多个振子组件，所述振子组件的数量比所述线圈的数量多一个，所述振子组件与所述线圈交替设置。
  10. 根据权利要求1所述的电磁激励器，其特征在于：包括多个线圈，所述线圈的数量比所述振子组件的数量多一个，所述线圈与所述振子组件交替设置。
  11. 一种屏幕发声装置，其特征在于：包括屏幕本体和如权利要求1-10中的任意一项所述的电磁激励器，所述电磁激励器被设置在所述屏幕本体上。
  12. 根据权利要求11所述的屏幕发声装置，其特征在于：所述电磁激励器通过弹性缓冲元件被设置在所述屏幕本体上。
PCT/CN2018/123670 2018-10-16 2018-12-26 电磁激励器以及屏幕发声装置 Ceased WO2020077844A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201821683587.0 2018-10-16
CN201821683587.0U CN208821081U (zh) 2018-10-16 2018-10-16 电磁激励器以及屏幕发声装置

Publications (1)

Publication Number Publication Date
WO2020077844A1 true WO2020077844A1 (zh) 2020-04-23

Family

ID=66279883

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/123670 Ceased WO2020077844A1 (zh) 2018-10-16 2018-12-26 电磁激励器以及屏幕发声装置

Country Status (2)

Country Link
CN (1) CN208821081U (zh)
WO (1) WO2020077844A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110113685B (zh) * 2019-05-24 2021-05-04 广州国显科技有限公司 屏幕发声装置
CN112243188B (zh) * 2019-07-19 2023-04-14 歌尔股份有限公司 换能器磁路结构、换能器及其电子设备
CN110933565B (zh) * 2019-11-27 2021-02-26 浙江省东阳市东磁诚基电子有限公司 一种新型屏幕发声激励器及其实现方法
CN111050252A (zh) 2019-12-02 2020-04-21 歌尔股份有限公司 一种用于电子产品的振动发声装置及电子产品
CN111182105B (zh) * 2019-12-31 2020-08-28 汉得利（常州）电子股份有限公司 一种适用于全面屏发声高灵敏度高功率宽频磁电激励器
CN111817525B (zh) * 2020-07-31 2021-10-08 歌尔股份有限公司 激励振动组件和电子终端

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090103767A1 (en) * 2005-11-02 2009-04-23 Jun Kuroda Speaker, image element protective screen, case of terminal and terminal
CN103139338A (zh) * 2013-01-22 2013-06-05 瑞声科技（南京）有限公司 屏幕发声控制系统、方法和移动终端
CN104469632A (zh) * 2014-11-28 2015-03-25 上海华勤通讯技术有限公司 一种发声方法及发声装置
CN106954147A (zh) * 2017-01-22 2017-07-14 瑞声科技(新加坡)有限公司 电子设备
CN206349904U (zh) * 2016-11-30 2017-07-21 歌尔股份有限公司 一种线性振动马达
CN108566592A (zh) * 2018-04-28 2018-09-21 歌尔股份有限公司 屏幕发声装置以及电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090103767A1 (en) * 2005-11-02 2009-04-23 Jun Kuroda Speaker, image element protective screen, case of terminal and terminal
CN103139338A (zh) * 2013-01-22 2013-06-05 瑞声科技（南京）有限公司 屏幕发声控制系统、方法和移动终端
CN104469632A (zh) * 2014-11-28 2015-03-25 上海华勤通讯技术有限公司 一种发声方法及发声装置
CN206349904U (zh) * 2016-11-30 2017-07-21 歌尔股份有限公司 一种线性振动马达
CN106954147A (zh) * 2017-01-22 2017-07-14 瑞声科技(新加坡)有限公司 电子设备
CN108566592A (zh) * 2018-04-28 2018-09-21 歌尔股份有限公司 屏幕发声装置以及电子设备

Also Published As

Publication number Publication date
CN208821081U (zh) 2019-05-03

Similar Documents

Publication Publication Date Title
CN109309892B (zh) 电磁激励器以及屏幕发声装置
WO2020077844A1 (zh) 电磁激励器以及屏幕发声装置
CN105874688B (zh) 触觉致动器
CN105518983B (zh) 触觉致动器
CN109068244B (zh) 电磁激励器以及屏幕发声装置
US10244323B2 (en) Vibration sound-producing apparatus
US9154884B2 (en) Electro-acoustic transducer
TWI436651B (zh) 多功能微型喇叭
KR102269152B1 (ko) 스피커
KR101434264B1 (ko) 햅틱 엑추에이터
CN111049349B (zh) 一种振动装置及电子产品
CN208821074U (zh) 电磁激励器以及屏幕发声装置
TWI422239B (zh) 多功能微型喇叭
WO2018171060A1 (zh) 线性振动马达
CN103200504A (zh) 用于动铁式受话器/扬声器的抗机械冲击电枢装置
CN114679674B (zh) 扬声器及电子设备
US10602278B2 (en) Speaker
WO2018157515A1 (zh) 用于线性振动马达的壳体以及线性振动马达
WO2020135289A1 (zh) 一种屏幕振动发声装置和电子产品
WO2018166090A1 (zh) 线性振动马达
KR101014190B1 (ko) 전자음향변환기
CN120128865B (zh) 一种骨导振子及电子设备
KR20150112644A (ko) 평판형 스피커
CN203416408U (zh) 振动发声器
CN120475307A (zh) 一种骨导振子及电子设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18937463

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18937463

Country of ref document: EP

Kind code of ref document: A1