WO2020147539A1 - 双面发声器件和电子产品 - Google Patents
双面发声器件和电子产品 Download PDFInfo
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- WO2020147539A1 WO2020147539A1 PCT/CN2019/128431 CN2019128431W WO2020147539A1 WO 2020147539 A1 WO2020147539 A1 WO 2020147539A1 CN 2019128431 W CN2019128431 W CN 2019128431W WO 2020147539 A1 WO2020147539 A1 WO 2020147539A1
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
Definitions
- the present invention belongs to the technical field of electronic products. Specifically, the present invention relates to a double-sided sound emitting device and an electronic product.
- the double-sided sound-producing acoustic device combines two sound-producing devices back to back together, which can exert a richer acoustic performance.
- Existing double-sided sound-producing acoustic devices usually adopt a suspended bracket 01 with side walls, and the bracket 01 is used to connect the central magnetic circuit assembly 02 and the outer magnetic circuit assembly 03.
- the voice coils 04 of the two sounding devices are of different sizes, and the two voice coils 04 are respectively located on the inner and outer sides of the side wall of the bracket 01.
- the existing double-sided sound-producing acoustic device has structural defects.
- the existing structural characteristics will cause the distance between the inner magnetic circuit and the outer magnetic circuit to be too large, and the space for the magnet to be placed is small, resulting in a small magnet.
- the above-mentioned structural defects will cause poor magnetic performance of the double-sided sound-producing acoustic device, the effective magnetic field strength available for two voice coils is small, and the acoustic device has low sound loudness.
- An object of the present invention is to provide an improved double-sided sound emitting device.
- a double-sided sound emitting device including:
- a support plate, the support plate has a flat structure
- a magnetic circuit system the magnetic circuit system includes a side magnet part and two center magnets, the two center magnets are arranged on both sides of the support plate, and the magnetization directions of the two center magnets are perpendicular to the center magnets.
- the edge magnet part surrounds the side surfaces of the two central magnets, and a magnetic gap is formed between the central magnet and the edge magnet part;
- each group of the vibration components includes a diaphragm and a voice coil, the voice coil is connected to the diaphragm, and the two voice coils are respectively suspended on two In the magnetic gap around the center magnet.
- the dimensions of the two voice coils are the same.
- the sizes of the two central magnets are the same; and/or, the magnetic poles of the two central magnets close to the supporting plate are opposite to each other.
- the voice coils of the two vibration components are configured to simultaneously vibrate in opposite directions.
- the winding directions of the two voice coils are the same, and the two voice coils are configured to pass in the same direction of current signals;
- the winding directions of the two voice coils are opposite, and the two voice coils are configured to pass in the same direction of current signals.
- the side magnetic part is an annular magnetically conductive side wall.
- the side magnet part includes two sets of side magnets, the two sets of side magnets are respectively arranged on both sides of the support plate, and the magnetization directions of the two sets of side magnets are perpendicular to the surface of the support plate , The two sets of magnetic poles of the side magnets close to the support plate that are opposite to each other;
- the magnetic poles of each group of the side magnets away from the supporting plate and the magnetic poles of the surrounding center magnet away from the supporting plate are opposite to each other.
- a set of side magnets includes a side magnet in a ring structure
- a set of side magnets includes at least two side magnets, and each side magnet is arranged around the center magnet.
- the side magnet part is a set of side magnets, the magnetization direction of the side magnets is perpendicular to the surface of the support plate, and the magnetic poles of the central magnet away from the support plate and the side magnets The magnetic poles at the corresponding positions are opposite to each other.
- a set of the side magnets includes a side magnet in a ring structure
- a group of side magnets includes at least two side magnets, and each side magnet is arranged around the two center magnets.
- the support plate forms a relatively fixed connection with the housing, wherein the support plate is made of a magnetically conductive material, or the support plate is made of a non-magnetically conductive material .
- the present invention also provides an electronic product, including:
- the double-sided sound emitting device is arranged in the product body, the product body has a sound outlet, and the sound outlet is used for transmitting the sound generated by the double-sided sound emitting device.
- One technical effect of the present invention is that the double-sided sound emitting device has a higher space utilization rate.
- Fig. 1 is a schematic side sectional view of an acoustic device that emits sound on both sides in the prior art
- FIG. 2 is a schematic side sectional view of a double-sided sound emitting device according to a specific embodiment of the present invention
- Fig. 3 is a schematic side sectional view of a double-sided sound emitting device according to another embodiment of the present invention.
- the present invention provides a double-sided sound emitting device.
- the double-sided sound emitting device includes a support plate 1, a magnetic circuit system, and two sets of vibration components.
- the magnetic circuit system includes a center magnet 21 and a side magnet part.
- the magnetic circuit system includes two central magnets 21.
- the two central magnets 21 are respectively arranged on both sides of the supporting plate 1.
- the supporting plate 1 has a flat plate structure for supporting the central magnet 21 and can save space.
- two central magnets 21 are respectively provided on the upper side and the lower side of the support plate 1.
- the supporting plate 1 is used for supporting and fixing the central magnet 21.
- the edge of the support plate 1 can be fixed in the double-sided sound emitting device to provide a supporting effect, and the support plate can be made of magnetically conductive materials, or the support plate can also be made of non-magnetically conductive materials. Made of materials.
- the magnetizing directions of the two central magnets 21 are perpendicular to the surface of the support plate 1. That is, the magnetic pole direction is perpendicular to the surface of the support plate 1.
- the magnetic poles of the two central magnets 21 close to the support plate 1 are opposite to each other.
- the magnetic pole direction of the central magnet 21 located above the support plate 1 is up S and down N
- the magnetic pole direction of the central magnet 21 located below the support plate 1 is also up S and down N.
- the two central magnets 21 are close to each other.
- the magnetic pole of the support plate 1 is opposite to the magnetic pole.
- the magnetic pole direction of the central magnet 21 located above the support plate 1 is up N down S
- the magnetic pole direction of the central magnet 21 located below the support plate 1 is also up N down S, which is close to the support.
- the magnetic poles of the plate 1 are mutually opposite magnetic poles.
- the edge magnet part is located on the side of the central magnet, and the edge magnet part surrounds the two central magnets in a surrounding form.
- the present invention does not limit the specific structure of the edge magnet part. Different edge magnet part structures have different advantages and are suitable for different products.
- the present invention will subsequently provide an optional specific structural implementation of the edge magnet part.
- a magnetic gap is formed between the side magnetic part and the side wall of the central magnet, and the side magnetic part is made of a magnetically conductive material, so that the side magnetic part and the central magnetic part form a magnetic field at the magnetic gap.
- each group of vibration components includes a diaphragm 31 and a voice coil 32, as shown in FIGS. 2 and 3, the voice coil 32 and its corresponding diaphragm 31 form a connection.
- the double-sided sound emitting device in this embodiment uses a support plate to provide support for two identical central magnets. Compared with the suspension bracket 01 with side walls in the traditional structure, it can reduce the internal magnetic circuit and The gap between the external magnetic circuits enhances the magnetic field strength in the magnetic gap and enhances the loudness of the sound-producing device; or on the other hand, the same space can increase the volume of the magnet and also enhance the magnetic field strength in the magnetic gap. Improve the loudness of the sound device.
- the size and shape of the two center magnets 21 can be the same. Further, based on the same shape and size of the two center magnets, the magnetic gap corresponding to the two center magnets also has the same Shape and size.
- the two voice coils 32 have the same size and shape, and the two voice coils 32 are respectively suspended in the two magnetic gaps. The use of a voice coil of equal size design saves space and improves the space utilization in the double-sided sounding device.
- the two central magnets form a complete and larger magnet, which can effectively improve the utilization rate of the magnetic field in the double-sided sound emitting device and provide a stronger magnetic field for the voice coil. In turn, the vibration performance of the voice coil and the diaphragm is improved.
- the voice coil 32 and the diaphragm 31 of the two vibration components are configured to be able to vibrate in opposite directions at the same time.
- the voice coil 32 and the diaphragm 31 located above vibrate upward the voice coil 32 and the diaphragm 31 located below vibrate downward.
- This preferred embodiment can increase the sound pressure of the double-sided sound emitting device.
- the two sets of vibration components can generate the same amplitude, so that the sound pressure of the double-sided sound device can be doubled, and the loudness of the double-sided sound device is greatly increased.
- the winding directions of the two voice coils 32 assembled in the double-sided sound generating device may be the same, and the directions of the current signals used to generate sound are also the same.
- the direction of the magnetic field in the upper magnetic gap is opposite to the direction of the magnetic field in the lower magnetic gap.
- the two The vibration directions of the two vibration components are opposite.
- the winding directions of the two voice coils assembled in the double-sided sounding device may be opposite, and the directions of the current signals used to generate sound are also the same. . In this way, the vibration directions of the two vibration components can be opposite.
- the present invention provides the following alternative embodiments.
- the side magnetic part may be an integral annular magnetically conductive side wall.
- the height of the annular magnetic conductive side wall is at least equivalent to the sum of the thickness of the two central magnets and the thickness of the support plate.
- the integral annular magnetic conductive side wall surrounds the two central magnets and forms a magnetic gap with the two central magnets respectively.
- the annular magnetically permeable side wall can also surround the part of the support plate for carrying the central magnet, and the annular magnetically permeable side wall can be provided with a gap or opening through which part of the structure of the support plate extends.
- the supporting plate may also have a part of the structure used to extend out of the space surrounded by the annular magnetically conductive side wall, so as to be fixedly connected to the double-sided sound emitting device. Since the two central magnets can form an integral magnet, the ring-shaped magnetic conductive side wall surrounding them can also form an integral magnet.
- the advantage of this embodiment is that the number of parts of the double-sided sound emitting device is small, the assembly process can be simplified, and the space is saved. The integrity and continuity of the magnetic circuit are better, and the application efficiency of the magnetic field is improved.
- the edge magnetic portion may include two annular magnetically conductive side walls, and the two annular magnetically conductive side walls are respectively arranged on both sides of the support plate.
- the two annular magnetic conductive side walls respectively correspond to the two central magnets one by one, and surround the corresponding central magnets.
- the edge magnet part includes two sets of edge magnets 22.
- the two sets of side magnets 22 are respectively arranged on both sides of the support plate 1, as shown in FIGS. 2 and 3.
- the magnetization directions of the two groups of side magnets 22 are perpendicular to the surface of the support plate 1, and the magnetic poles of the two groups of side magnets 22 close to the support plate 1 have different-shaped magnetic poles.
- the side magnets 22 located on the upper and lower sides of the support plate 1 are in a magnetic pole distribution pattern of upper N and lower S.
- the side magnets 22 located on the upper and lower sides of the support plate 1 are all magnetic pole distributions of upper S and lower N.
- the magnetic poles of the side magnets 22 away from the support plate 1 and the magnetic poles of the center magnet 21 around which are away from the support plate 1 are opposite to each other.
- a magnetic field as shown by the broken lines in FIGS. 2 and 3 can be formed in the magnetic gap between the side magnet 22 and the center magnet 21.
- the upper and lower sets of side magnets 22 form an integral magnet to cooperate with the center magnet 21, thereby increasing the strength of the magnetic field and the area covered by the magnetic field, which can effectively improve the overall sensitivity and loudness of the double-sided sound emitting device.
- the side magnet part may also be a set of side magnets, and the thickness of the side magnets is at least equal to the sum of the thickness of the two central magnets and the thickness of the support plate.
- the side magnets are located directly around the two center magnets. Through this group of side magnets and two center magnets form a magnetic circuit match.
- the magnetization direction of the side magnet is perpendicular to the surface of the support plate, and the magnetic poles of the center magnet far from the support plate and the magnetic poles at the corresponding positions of the side magnets are opposite magnetic poles.
- the upper pole N of the side magnet is the upper pole S of the center magnet on the upper side of the support plate.
- the lower magnetic pole S of the side magnet is located at the lower magnetic pole N of the center magnet on the lower side of the support plate.
- the side magnets may be ring-shaped side magnets or split side magnets.
- ring-shaped side magnets the assembly process is simpler and the magnetic gap is longer, which helps improve the vibration sensitivity of the voice coil.
- split side magnets are used, each set of side magnets includes at least two side magnets.
- a group of side magnets are arranged around the central magnet in a symmetrical and centrally symmetrical manner. The advantage of using the split side magnet is that it is convenient to extend the lead wire drawn from the voice coil to a position outside the side magnet part, and it is also convenient to extend part of the structure of the support plate beyond the side magnet part.
- the double-sided sound emitting device may further include a housing, and the housing is used to carry the support plate, the magnetic circuit system and the vibration component.
- the support plate may form a relatively fixed connection with the housing.
- the support plate is directly extended to the housing for a fixed connection, or the support plate is loaded between two central magnets and side magnets, and the side magnet and the central magnet located below the support plate form a fixed connection with the housing.
- the surface of the central magnet 21 away from the support plate 1 may also be covered with a central magnetic conductive plate 211, as shown in FIGS. 2 and 3.
- the central magnetic conductive plate 211 is configured to restrict and concentrate the magnetic field generated by the central magnet 21, and guide the magnetic field to the magnetic gap and the position of the peripheral side magnetic part.
- the upper and lower end surfaces of the side magnets may also be covered with side magnetic conductive plates 221, as shown in FIGS. 2 and 3.
- the side magnetic guide plate 221 is configured to restrict and concentrate the magnetic field generated by the side magnets, and guide the magnetic field to the magnetic gap and the position of the center magnet 21 in the center area.
- the advantage of using the central and side magnetic conductive plates is that they can effectively improve the magnetic field strength and the uniformity of the magnetic field in the magnetic gap, so that the voice coil can receive stronger Lorentz force, which is then converted into vibration amplitude.
- the use of a magnetic conductive plate can more effectively use the magnetic field generated by the magnet.
- the present invention also provides an electronic product, which can be a mobile phone, a tablet computer, etc., which is not limited by the present invention.
- the electronic product includes the product body and the above-mentioned double-sided sound emitting device.
- the double-sided sound emitting device is arranged in the product body.
- the product body is provided with a sound outlet, and the sound outlet is used for transmitting the sound generated by the double-sided sound emitting device.
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Abstract
本发明涉及一种双面发声器件和电子产品。该双面发声器件包括：支撑板，所述支撑板呈平板结构；磁路系统，所述磁路系统包括边磁部和两块中心磁铁，两块所述中心磁铁设置在所述支撑板的两侧表面上，两块所述中心磁铁的充磁方向垂直于所述支撑板的表面，所述边磁部环绕在两块所述中心磁铁的侧面，所述中心磁铁与所述边磁部之间形成有磁间隙；两组分别位于所述支撑板的两侧的振动组件，每组所述振动组件包括振膜和音圈，所述音圈连接在所述振膜上，两个所述音圈分别悬于两块所述中心磁铁周围的磁间隙中。
Description
本发明属于电子产品技术领域，具体地，本发明涉及一种双面发声器件和电子产品。
近年来，手机、平板电脑等消费类电子产品得到了消费者的广泛应用。随着电子产品相关技术的快速发展，为了达到更优的性能，本领域技术人员对电子产品的结构等特点进行了改进。
在现有技术中，本领域技术人员设计了一种双面发声的声学器件。如图1所示，双面发声的声学器件是将两个发声装置单体背对背组合在一起，其能够发挥出更丰富的声学性能。现有的双面发声声学器件通常采用带有侧壁的悬吊式支架01，该支架01用来连接中心磁路组件02和外磁路组件03。两个发声装置单体的音圈04的尺寸不同，两个音圈04分别位于该支架01的侧壁的内外两侧。
但是，现有的双面发声声学器件存在结构缺陷，现有的结构特点会造成内磁路与外磁路之间的间距过大，供磁铁放置的空间较小，造成磁铁体积小。上述结构缺陷会造成双面发声声学器件的磁性能较差，两个音圈可获得的有效磁场强度小，声学器件的声音响度低。
发明内容
本发明的一个目的是提供一种改进的双面发声器件。
根据本发明的一个方面，提供了一种双面发声器件，包括：
支撑板，所述支撑板呈平板结构；
磁路系统，所述磁路系统包括边磁部和两块中心磁铁，两块所述中心磁铁设置在所述支撑板的两侧表面上，两块所述中心磁铁的充磁方向垂直 于所述支撑板的表面，所述边磁部环绕在两块所述中心磁铁的侧面，所述中心磁铁与所述边磁部之间形成有磁间隙；
两组分别位于所述支撑板的两侧的振动组件，每组所述振动组件包括振膜和音圈，所述音圈连接在所述振膜上，两个所述音圈分别悬于两块所述中心磁铁周围的磁间隙中。
可选地，两个所述音圈的尺寸相同。
可选地，两块所述中心磁铁的尺寸相同；和/或，两块所述中心磁铁的靠近所述支撑板的磁极为相互异性磁极。
可选地，两个所述振动组件的音圈被配置为同时向相反的方向振动。
可选地，两个所述音圈的绕线方向相同，两个所述音圈被配置为通入的电流信号的方向相同；
或者，两个所述音圈的绕线方向相反，两个所述音圈被配置为通入的电流信号的方向相同。
可选地，所述边磁部为环形导磁侧壁。
可选地，所述边磁部包括两组边磁铁，两组边磁铁分别设置在所述支撑板的两侧表面上，两组所述边磁铁的充磁方向垂直于所述支撑板的表面，两组所述边磁铁的靠近所述支撑板的磁极为相互异性的磁极；
每一组所述边磁铁的远离所述支撑板的磁极与其所环绕的中心磁铁的远离所述支撑板的磁极互为异性磁极。
可选地，一组边磁铁包括一个呈环形结构的边磁铁；
或者，一组边磁铁包括至少两块边磁铁，每块所述边磁铁设置在所述中心磁铁的周围。
可选地，所述边磁部为一组边磁铁，所述边磁铁的充磁方向垂直于所述支撑板的表面，所述中心磁铁的远离所述支撑板的磁极与所述边磁铁的对应位置处的磁极互为异性磁极。
可选地，一组所述边磁铁包括一个呈环形结构的边磁铁；
或者，一组边磁铁包括至少两块边磁铁，每块所述边磁铁设置在两块所述中心磁铁的周围。
可选地，还包括壳体，所述支撑板与所述壳体形成相对固定的连接， 其中，所述支撑板为导磁材料制成，或者，所述支撑板由非导磁材料制成。
本发明还提供了一种电子产品，包括：
上述双面发声器件；
产品主体，所述双面发声器件设置在所述产品主体中，所述产品主体上具有出声口，所述出声口供所述双面发声器件产生的声音传出。
本发明的一个技术效果在于，双面发声器件的空间利用率更高。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
构成说明书的一部分的附图描述了本发明的实施例，并且连同说明书一起用于解释本发明的原理。
图1是现有技术中双面发声的声学器件的侧面剖视示意图；
图2是本发明具体实施方式提供的双面发声器件的侧面剖视示意图；
图3是本发明另一具体实施方式提供的双面发声器件的侧面剖视示意图。
现在将参照附图来详细描述本发明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发明的范围。
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，决不作为对本发明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和设备可能不作详细讨论，但在适当情况下，所述技术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。
本发明提供了一种双面发声器件，如图1所示，该双面发声器件包括支撑板1、磁路系统以及两组振动组件。
所述磁路系统包括中心磁铁21和边磁部。在该双面发声器件中，磁路系统包括两块中心磁铁21。两块所述中心磁铁21分别设置在所述支撑板1的两侧表面上。所述支撑板1呈平板结构，用于支撑中心磁铁21的且能够节省空间。在如图2所示的实施方式中，两块中心磁铁21分别设置在支撑板1的上侧和下侧。所述支撑板1用于对所述中心磁铁21提供支撑、固定的作用。可选地，所述支撑板1的边缘可以固定在双面发声器件中，从而提供支撑作用，且所述支撑板可以为导磁材料制成，或者，所述支撑板也可以由非导磁材料制成。特别地，两块中心磁铁21的充磁方向均垂直于所述支撑板1的表面。也即磁极方向垂直于支撑板1的表面。
特别地，两块所述中心磁铁21的靠近所述支撑板1的磁极为相互异性的磁极。如图2所示，位于支撑板1上方的中心磁铁21的磁极方向为上S下N，位于支撑板1下方的中心磁铁21的磁极方向也为上S下N，两个中心磁铁21相互靠近与支撑板1的磁极为异性磁极。在如图3所示的实施方式中，位于支撑板1上方的中心磁铁21的磁极方向为上N下S，位于支撑板1下方的中心磁铁21的磁极方向也为上N下S，靠近支撑板1的磁极为相互异性磁极。通过这种设计方式，使得上下两块中心磁铁能够组合成一个整体磁体，提高双面发声器件中的磁路的连贯性和整体性。能够提高双面发声器件中的磁场利用率。
所述边磁部处在所述中心磁铁的侧面，边磁部以环绕的形式围绕在两块所述中心磁铁周围。本发明并不对边磁部的具体结构形式进行限制，不同的边磁部结构具有不同的优点，适用于不同的产品。本发明后续提供有可选的边磁部的具体结构实施方式。所述边磁部与所述中心磁铁的侧壁之间形成有磁间隙，所述边磁部采用导磁材料制成，使得边磁部与中心磁部在所述磁间隙处形成有磁场。
上述两组所述振动组件分别位于所述支撑板1的两侧，每组振动组件均包括振膜31和音圈32，如图2、3所示，所述音圈32与其所对应的振膜31形成连接。基于上述整体设计，本实施例中的双面发声器件采用支撑板对两块相同的中心磁铁提供支撑，相对于传统结构中采用带有侧壁的悬吊支架01，可以减小内磁路和外磁路之间的间隙，增强磁间隙中的磁场强度，提升发声器件的响度；或者从另一方面来说，相同的空间内可以增大磁铁体积，同样可以增强磁间隙中的磁场强度，提升发声器件的响度。
具体的，本实施例中，两块中心磁铁21的尺寸、形状可以做到相同，进一步的，基于两块中心磁铁的形状、尺寸相同，对应于两块中心磁铁形成的磁间隙也具有相同的形状和尺寸。两个所述音圈32的尺寸、形状相同，两个所述音圈32分别悬于两个所述磁间隙中。采用了等大设计的音圈，节省了空间，提高了双面发声器件中的空间利用率。
而且，通过对中心磁铁的磁极方向的配置，使得两块中心磁铁形成一块完整的、体积更大的磁体，能够有效提高双面发声器件中的磁场利用率，为音圈提供更强的磁场，进而提高音圈和振膜的振动性能。
优选地，两个所述振动组件的音圈32和振膜31被配置为能够同时向相反的方向振动。例如，位于上方的音圈32和振膜31在向上振动的时候，位于下方的音圈32和振膜31向下振动。这种优选的实施方式能够使双面发声器件提高声压。在通入的两路用于产生声音的电流信号相同的情况下，两组振动组件能够产生相同的振幅，使得双面发声器件的声压能够成倍叠加，大幅增加双面发声器件的响度。
可选地，装配在双面发声器件中的两个所述音圈32的绕线方向可以是相同的，而通入的用于产生声音的电流信号的方向也是相同的。这样，如图2、3所示，由于中心磁铁21的上述磁极分布特点，使得位于上方的磁间隙中的磁场方向与位于下方的磁间隙中的磁场方向相反，根据左手定则，进而使得两个振动组件的振动方向相反。
在另一种可选的实施方式中，装配在双面发声器件中的两个所述音圈的绕线方向可以是相反的，而通入的用于产生声音的电流信号的方向也是相同的。这样也可以使得两个振动组件的振动方向相反。
对于所述边磁部的结构形式，本发明提供了如下几种可选实施方式。
在一种可选的实施方式中，所述边磁部可以是一个整体的环形导磁侧壁。该环形导磁侧壁的高度至少相当于两块中心磁铁的厚度和支撑板的厚度之和。该一体的环形导磁侧壁环绕在两个所述中心磁铁周围，分别与两个所述中心磁铁形成磁间隙。环形导磁侧壁也可以将支撑板的用于承载中心磁铁的部分围绕其中，环形导磁侧壁上可以设置有供支撑板的部分结构伸出的缺口或开口。相应地，所述支撑板上也可以具有用于伸出至环形导磁侧壁所环绕的空间之外，以便固定连接在双面发声器件中的部分结构。由于两个所述中心磁铁能够形成一个整体磁体，因此环绕于其周围的环形导磁侧壁也能够形成一个整体磁体。这种实施方式的优点在于双面发声器件的零部件数量少，能够简化装配工艺，节省空间。磁路的整体性、连贯性更好，提高磁场的应用效率。
在另一种可选的实施方式中，所述边磁部可以包括两个环形导磁侧壁，两个环形导磁侧壁分别设置在所述支撑板的两侧表面上。两个环形导磁侧壁分别与两个中心磁铁一一对应，将对应的中心磁铁环绕与其中。这种实施方式的优点在于，两个环形导磁侧壁分体式设置，无需为支撑板开设供其伸出的缺口。降低了环形导磁侧壁的加工难度，而且也能够降低中心磁铁的磁场向外泄露的情况。
在另一种可选的实施方式中，所述边磁部包括两组边磁铁22。两组所述边磁铁22分别设置在所述支撑板1的两侧表面上，如图2、3所示。两组所述边磁铁22的充磁方向垂直于所述支撑板1的表面，两组所述边磁铁22的靠近所述支撑板1的磁极为相互异形的磁极。如图2所示，位于支撑板1上下两侧的边磁铁22均为上N下S的磁极分布方式。如图3所示，位于支撑板1上下两侧的边磁铁22均为上S下N的磁极分布方式。而且，边磁铁22的远离所述支撑板1的磁极，与其所环绕的中心磁铁21的远离所述支撑板1的磁极互为异性磁极。如图2所示，支撑板1上方的边磁铁22的上磁极为N，支撑板1上方的中心磁铁21的上磁极为S。支撑板1下方的边磁铁22的下磁极为S，支撑板1下方的中心磁铁21的下磁极为N。如图3所示，支撑板1上方的边磁铁22的上磁极为S，支撑板1上方的中心 磁铁21的上磁极为N。支撑板1下方的边磁铁22的下磁极为N，支撑板1下方的中心磁铁21的下磁极为S。通过这种磁极分布方式，边磁铁22与中心磁铁21之间的磁间隙中能够形成如图2、3的虚线所示的磁场。上下两组边磁铁22形成一个整体磁体与中心磁铁21形成配合，从而使磁场强度增大，磁场覆盖的区域增大，能够有效提高双面发声器件的整体灵敏度和响度。
在另一种可选的实施方式中，所述边磁部还可以为一组边磁铁，该边磁铁的厚度至少等于两块中心磁铁的厚度与支撑板的厚度之和。边磁铁直接处在两块中心磁铁的周围的位置处。通过这一组边磁铁与两个中心磁铁形成磁路配合。特别地，所述边磁铁的充磁方向垂直于所述支撑板的表面，所述中心磁铁的远离所述支撑板的磁极与所述边磁铁的对应位置处的磁极互为异性磁极。例如，边磁铁的上磁极为N，则位于支撑板的上侧的中心磁铁的上磁极为S。边磁铁的下磁极为S，则位于支撑板的下侧的中心磁铁的下磁极为N。这种磁路分布能够使得所述边磁铁与中心磁铁形成整体的、完整的磁回路。
对于上述采用边磁铁的实施方式，所述边磁铁可以是环形边磁铁，也可以是分体式的边磁铁。采用环形边磁铁，则装配工艺更简单，磁间隙更长，有助于提高音圈的振动灵敏度。如果采用分体式的边磁铁，则每组边磁铁至少包括两块边磁铁。一组边磁铁以对称、中心对称的形式环绕设置在所述中心磁铁的周围。采用分体式边磁铁的优点在于便于将音圈上引出的引线延伸至边磁部之外的位置，也便于将支撑板的部分结构伸出至边磁部之外。
可选地，所述双面发声器件还可以包括壳体，所述壳体用于承载支撑板、磁路系统以及振动组件。所述支撑板可以与所述壳体形成相对固定的连接。例如，支撑板直接延伸到壳体上固定连接，或者支撑板加载两块中心磁铁和边磁铁之间，位于支撑板下方的边磁铁和中心磁铁与壳体形成固定连接。
可选地，所述中心磁铁21的远离所述支撑板1的表面上还可以盖设有中心导磁板211，如图2、3所示。所述中心导磁板211被配置为用于对 中心磁铁21产生的磁场起到约束、集中的作用，将磁场导向磁间隙以及外围的边磁部的位置。
可选地，在采用边磁铁的实施方式中，所述边磁铁的上下两个端面上还可以盖设有边导磁板221，如图2、3所示。所述边导磁板221被配置为用于对边磁铁产生的磁场起到约束、集中的作用，将磁场导向磁间隙以及中心区域的中心磁铁21的位置。
采用中心导磁板和边导磁板的优点在于，能够有效提高磁间隙中的磁场强度和磁场均匀程度，使得音圈能够受到更强的洛伦兹力，进而转化成振动的振幅。利用导磁板可以更有效的利用磁铁产生的磁场。
本发明还提供了一种电子产品，该电子产品可以是手机、平板电脑等，本发明不对此进行限制。电子产品包括产品主体和上述双面发声器件。双面发声器件设置在所述产品主体中。产品主体上具有出声口，所述出声口供所述双面发声器件产生的声音传出。
虽然已经通过示例对本发明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，以上示例仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。
Claims (12)
- 一种双面发声器件，其特征在于，包括：支撑板，所述支撑板呈平板结构；磁路系统，所述磁路系统包括边磁部和两块中心磁铁，两块所述中心磁铁设置在所述支撑板的两侧表面上，两块所述中心磁铁的充磁方向垂直于所述支撑板的表面，所述边磁部环绕在两块所述中心磁铁的侧面，所述中心磁铁与所述边磁部之间形成有磁间隙；两组分别位于所述支撑板的两侧的振动组件，每组所述振动组件包括振膜和音圈，所述音圈连接在所述振膜上，两个所述音圈分别悬于两块所述中心磁铁周围的磁间隙中。
- 根据权利要求1所述的双面发声器件，其特征在于，两个所述音圈的尺寸相同。
- 根据权利要求1所述的双面发声器件，其特征在于，两块所述中心磁铁的尺寸相同；和/或，两块所述中心磁铁的靠近所述支撑板的磁极为相互异性磁极。
- 根据权利要求1所述的双面发声器件，其特征在于，两个所述振动组件的音圈被配置为同时向相反的方向振动。
- 根据权利要求4所述的双面发声器件，其特征在于，两个所述音圈的绕线方向相同，两个所述音圈被配置为通入的电流信号的方向相同；或者，两个所述音圈的绕线方向相反，两个所述音圈被配置为通入的电流信号的方向相同。
- 根据权利要求1至5任一所述的双面发声器件，其特征在于，所述边磁部为环形导磁侧壁。
- 根据权利要求1至5任一所述的双面发声器件，其特征在于，所述边磁部包括两组边磁铁，两组边磁铁分别设置在所述支撑板的两侧表面上，两组所述边磁铁的充磁方向垂直于所述支撑板的表面，两组所述边磁铁的靠近所述支撑板的磁极为相互异性的磁极；每一组所述边磁铁的远离所述支撑板的磁极与其所环绕的中心磁铁 的远离所述支撑板的磁极互为异性磁极。
- 根据权利要求7所述的双面发声器件，其特征在于，一组边磁铁包括一个呈环形结构的边磁铁；或者，一组边磁铁包括至少两块边磁铁，每块所述边磁铁设置在所述中心磁铁的周围。
- 根据权利要求1至5任一所述的双面发声器件，其特征在于，所述边磁部为一组边磁铁，所述边磁铁的充磁方向垂直于所述支撑板的表面，所述中心磁铁的远离所述支撑板的磁极与所述边磁铁的对应位置处的磁极互为异性磁极。
- 根据权利要求9所述的双面发声器件，其特征在于，一组所述边磁铁包括一个呈环形结构的边磁铁；或者，一组边磁铁包括至少两块边磁铁，每块所述边磁铁设置在两块所述中心磁铁的周围。
- 根据权利要求1至5任一所述的双面发声器件，其特征在于，还包括壳体，所述支撑板与所述壳体形成相对固定的连接，其中，所述支撑板为导磁材料制成，或者，所述支撑板由非导磁材料制成。
- 一种电子产品，其特征在于，包括：权利要求1-11任意之一所述的双面发声器件；产品主体，所述双面发声器件设置在所述产品主体中，所述产品主体上具有出声口，所述出声口供所述双面发声器件产生的声音传出。
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| JP2009177714A (ja) * | 2008-01-28 | 2009-08-06 | Sanyo Electric Co Ltd | 磁気回路および音響機器 |
| CN206820948U (zh) * | 2017-04-28 | 2017-12-29 | 北京欧意智能科技有限公司 | 平面振膜扬声器及耳机 |
| CN108882089A (zh) * | 2018-06-29 | 2018-11-23 | 维沃移动通信有限公司 | 一种受话器及移动终端 |
| CN209283487U (zh) * | 2019-01-15 | 2019-08-20 | 歌尔科技有限公司 | 双面发声器件和电子产品 |
-
2019
- 2019-01-15 CN CN201920066337.0U patent/CN209283487U/zh active Active
- 2019-12-25 WO PCT/CN2019/128431 patent/WO2020147539A1/zh active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2790087Y (zh) * | 2005-03-17 | 2006-06-21 | 浙江新嘉联电子股份有限公司 | 内磁式双面电声转换器 |
| JP2009177714A (ja) * | 2008-01-28 | 2009-08-06 | Sanyo Electric Co Ltd | 磁気回路および音響機器 |
| CN206820948U (zh) * | 2017-04-28 | 2017-12-29 | 北京欧意智能科技有限公司 | 平面振膜扬声器及耳机 |
| CN108882089A (zh) * | 2018-06-29 | 2018-11-23 | 维沃移动通信有限公司 | 一种受话器及移动终端 |
| CN209283487U (zh) * | 2019-01-15 | 2019-08-20 | 歌尔科技有限公司 | 双面发声器件和电子产品 |
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