CN205017577U - Micro loudspeaker - Google Patents
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- CN205017577U CN205017577U CN201520812643.6U CN201520812643U CN205017577U CN 205017577 U CN205017577 U CN 205017577U CN 201520812643 U CN201520812643 U CN 201520812643U CN 205017577 U CN205017577 U CN 205017577U
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Abstract
本实用新型公开了一种微型扬声器，涉及电声产品技术领域，包括外壳，所述外壳内收容有振动系统和磁路系统，所述磁路系统包括导磁部件，所述导磁部件上依次固定有第一磁铁和华司，所述第一磁铁的充磁方向为垂直方向，所述第一磁铁上还设有环形的第二磁铁，所述第二磁铁与所述华司均固定在所述第一磁铁靠近所述振动系统的一侧表面上，所述第二磁铁的充磁方向为水平方向；且所述第二磁铁位于所述第一磁铁边缘部位的磁极与所述第一磁铁的该侧磁极相同，所述第二磁铁位于所述第一磁铁中心部位的磁极与所述第一磁铁的该侧磁极相反。本实用新型微型扬声器的磁通量密度大，音圈受到的磁场力大，灵敏度高，整体声学性能好。
The utility model discloses a miniature loudspeaker, which relates to the technical field of electroacoustic products, and comprises a housing, wherein a vibration system and a magnetic circuit system are accommodated in the housing, and the magnetic circuit system includes a magnetic conduction part, and the magnetic conduction part is successively The first magnet and the Washer are fixed, the magnetization direction of the first magnet is vertical, and the ring-shaped second magnet is also arranged on the first magnet, and the second magnet and the Washer are fixed on the On the side surface of the first magnet close to the vibrating system, the magnetization direction of the second magnet is the horizontal direction; The magnetic poles of the side of the magnets are the same, and the magnetic poles of the second magnet located at the center of the first magnet are opposite to the magnetic poles of the side of the first magnet. The miniature loudspeaker of the utility model has high magnetic flux density, large magnetic field force received by the voice coil, high sensitivity and good overall acoustic performance.
Description
技术领域technical field
本实用新型涉及电声产品技术领域，特别涉及一种微型扬声器。The utility model relates to the technical field of electroacoustic products, in particular to a micro speaker.
背景技术Background technique
微型扬声器是便携式电子设备的重要声学部件，用于完成电信号与声音信号之间的转换，是一种能量转换器件。现有的微型扬声器包括振动系统和磁路系统，磁路系统包括磁铁及磁间隙，振动系统中的音圈位于磁间隙内。现有的微型扬声器的磁铁的充磁方向均为垂直方向，即与音圈的振动方向相同，此种结构的微型扬声器磁通量密度小，穿过音圈的磁力线数量少，从而导致音圈受到的磁场力较小，微型扬声器的灵敏度低，整体声学性能差。Microspeaker is an important acoustic component of portable electronic equipment, which is used to complete the conversion between electrical signals and sound signals, and is an energy conversion device. The existing miniature loudspeaker includes a vibration system and a magnetic circuit system, the magnetic circuit system includes a magnet and a magnetic gap, and the voice coil in the vibration system is located in the magnetic gap. The magnetization directions of the magnets of the existing micro-speakers are all in the vertical direction, that is, the same as the vibration direction of the voice coil. The micro-speaker with this structure has a small magnetic flux density and a small number of magnetic force lines passing through the voice coil, which leads to the vibration of the voice coil. The magnetic field force is small, the sensitivity of the micro-speaker is low, and the overall acoustic performance is poor.
实用新型内容Utility model content
针对以上缺陷，本实用新型所要解决的技术问题是提供一种微型扬声器，此微型扬声器的磁通量密度大，灵敏度高，整体声学性能好。In view of the above defects, the technical problem to be solved by the utility model is to provide a micro-speaker with high magnetic flux density, high sensitivity and good overall acoustic performance.
为解决上述技术问题，本实用新型的技术方案是：For solving the problems of the technologies described above, the technical solution of the utility model is:
一种微型扬声器，包括外壳，所述外壳内收容有振动系统和磁路系统，所述磁路系统包括导磁部件，所述导磁部件上依次固定有第一磁铁和华司，所述第一磁铁的充磁方向为垂直方向，所述第一磁铁上还设有环形的第二磁铁，所述第二磁铁与所述华司均固定在所述第一磁铁靠近所述振动系统的一侧表面上，所述第二磁铁的充磁方向为水平方向；且所述第二磁铁位于所述第一磁铁边缘部位的磁极与所述第一磁铁的该侧磁极相同，所述第二磁铁位于所述第一磁铁中心部位的磁极与所述第一磁铁的该侧磁极相反。A miniature loudspeaker, comprising a casing, a vibration system and a magnetic circuit system are accommodated in the casing, and the magnetic circuit system includes a magnetic conductive part, and a first magnet and a washer are sequentially fixed on the magnetic conductive part, and the first magnet The magnetization direction of a magnet is the vertical direction, the first magnet is also provided with a ring-shaped second magnet, and the second magnet and the washer are fixed on a side of the first magnet close to the vibration system. On the side surface, the magnetization direction of the second magnet is the horizontal direction; and the magnetic pole of the second magnet at the edge of the first magnet is the same as the side magnetic pole of the first magnet, and the second magnet The magnetic pole at the central part of the first magnet is opposite to the magnetic pole at the side of the first magnet.
作为一种实施方式，所述导磁部件为导磁板，所述第一磁铁包括固定在所述导磁板中心部位的内磁铁和固定在所述导磁板边缘部位的外磁铁；所述华司包括固定在所述内磁铁上的内华司和固定在所述外磁铁上的外华司；所述内磁铁与所述外磁铁之间设有磁间隙。As an embodiment, the magnetically permeable component is a magnetically permeable plate, and the first magnet includes an inner magnet fixed at the center of the magnetically permeable plate and an outer magnet fixed at the edge of the magnetically permeable plate; The washer includes an inner washer fixed on the inner magnet and an outer washer fixed on the outer magnet; a magnetic gap is set between the inner magnet and the outer magnet.
其中，所述第二磁铁包括固定在所述内磁铁上的内环磁，所述内环磁固定在所述内磁铁靠近所述磁间隙的边缘部位，所述内华司位于所述内环磁的内侧。Wherein, the second magnet includes an inner ring magnet fixed on the inner magnet, the inner ring magnet is fixed on the edge of the inner magnet close to the magnetic gap, and the Nevas is located on the inner ring Magnetic inside.
其中，所述第二磁铁包括固定在所述外磁铁上的外环磁，所述外环磁固定在所述外磁铁靠近所述磁间隙的边缘部位，所述外华司位于所述外环磁的外侧。Wherein, the second magnet includes an outer ring magnet fixed on the outer magnet, the outer ring magnet is fixed on the edge of the outer magnet close to the magnetic gap, and the outer washer is located on the outer ring Magnetic outside.
其中，所述第二磁铁包括固定在所述内磁铁上的内环磁和固定在所述外磁铁上的外环磁；所述内环磁固定在所述内磁铁靠近所述磁间隙的边缘部位，所述内华司位于所述内环磁的内侧；所述外环磁固定在所述外磁铁靠近所述磁间隙的边缘部位，所述外华司位于所述外环磁的外侧。Wherein, the second magnet includes an inner ring magnet fixed on the inner magnet and an outer ring magnet fixed on the outer magnet; the inner ring magnet is fixed on the edge of the inner magnet close to the magnetic gap position, the inner washer is located inside the inner ring magnet; the outer ring magnet is fixed at the edge of the outer magnet close to the magnetic gap, and the outer washer is located outside the outer ring magnet.
作为另一种实施方式，所述导磁部件为盆架，所述盆架的中心部位依次固定有所述第一磁铁和所述华司，所述第一磁铁与所述盆架的侧壁之间设有磁间隙；所述第二磁铁固定在所述第一磁铁靠近所述磁间隙的边缘部位，所述华司位于所述第二磁铁的内侧。As another embodiment, the magnetically conductive component is a frame, the center of the frame is fixed with the first magnet and the washer in turn, and the first magnet and the side wall of the frame There is a magnetic gap between them; the second magnet is fixed on the edge of the first magnet close to the magnetic gap, and the washer is located inside the second magnet.
其中，所述磁路系统为圆形结构，所述第二磁铁为圆形环状磁铁。Wherein, the magnetic circuit system is a circular structure, and the second magnet is a circular ring magnet.
其中，所述磁路系统为矩形结构，所述第二磁铁为矩形环状磁铁。Wherein, the magnetic circuit system is a rectangular structure, and the second magnet is a rectangular ring magnet.
采用了上述技术方案后，本实用新型的有益效果是：After adopting above-mentioned technical scheme, the beneficial effect of the utility model is:
由于本实用新型微型扬声器的磁路系统包括导磁部件，导磁部件上依次固定有第一磁铁和华司，第一磁铁的充磁方向为垂直方向，第一磁铁上还设有环形的第二磁铁，第二磁铁与华司均固定在第一磁铁靠近振动系统的一侧表面上，第二磁铁的充磁方向为水平方向；且第二磁铁位于第一磁铁边缘部位的磁极与第一磁铁的该侧磁极相同，第二磁铁位于第一磁铁中心部位的磁极与第一磁铁的该侧磁极相反。第二磁铁的充磁方向与第一磁铁的充磁方向相垂直，第二磁铁的磁场与第一磁铁的磁场叠加后穿过磁隙，大大的增加磁隙区域的磁通量的密度，增加了穿过音圈的磁力线数量，如图3所示，增大了音圈受到的磁场力，提高了微型扬声器的灵敏度，进而提高了微型扬声器的整体声学性能。Because the magnetic circuit system of the miniature loudspeaker of the utility model includes a magnetic conduction part, the first magnet and the washer are fixed in turn on the magnetic conduction part, the magnetization direction of the first magnet is the vertical direction, and the first magnet is also provided with a ring-shaped first magnet. Two magnets, the second magnet and the washer are fixed on the surface of the first magnet close to the vibration system, the magnetization direction of the second magnet is horizontal; and the magnetic pole of the second magnet is located at the edge of the first magnet and the first The magnetic poles of the side of the magnet are the same, and the magnetic pole of the second magnet located in the center of the first magnet is opposite to the magnetic pole of the side of the first magnet. The magnetization direction of the second magnet is perpendicular to the magnetization direction of the first magnet. The magnetic field of the second magnet is superimposed on the magnetic field of the first magnet and passes through the magnetic gap, which greatly increases the density of the magnetic flux in the magnetic gap area and increases the wear resistance. The number of magnetic force lines passing through the voice coil, as shown in Figure 3, increases the magnetic force on the voice coil, improves the sensitivity of the micro-speaker, and improves the overall acoustic performance of the micro-speaker.
综上所述，本实用新型微型扬声器解决了现有技术中微型扬声器磁通量密度小等技术问题，本实用新型微型扬声器的磁通量密度大，音圈受到的磁场力大，灵敏度高，整体声学性能好。In summary, the micro-speaker of the utility model solves the technical problems such as the low magnetic flux density of the micro-speaker in the prior art. The micro-speaker of the utility model has a large magnetic flux density, a large magnetic field force on the voice coil, high sensitivity, and good overall acoustic performance. .
附图说明Description of drawings
图1是本实用新型微型扬声器实施例一的剖视结构示意图；Fig. 1 is a schematic cross-sectional structure diagram of Embodiment 1 of the micro-speaker of the present invention;
图2是本实用新型微型扬声器实施例一的内部结构示意图—未包含振动系统；Fig. 2 is a schematic diagram of the internal structure of Embodiment 1 of the micro-speaker of the present invention—not including the vibration system;
图3是本实用新型微型扬声器的磁力线分布仿真图；Fig. 3 is the simulation diagram of the distribution of magnetic lines of force of the utility model miniature loudspeaker;
图4是本实用新型微型扬声器实施例二的内部结构示意图—未包含振动系统；Fig. 4 is a schematic diagram of the internal structure of Embodiment 2 of the micro-speaker of the present invention—not including the vibration system;
图5是本实用新型微型扬声器实施例三的内部结构示意图—未包含振动系统；Fig. 5 is a schematic diagram of the internal structure of Embodiment 3 of the micro-speaker of the present invention—not including the vibration system;
图6是本实用新型微型扬声器实施例四的内部结构示意图—未包含振动系统；Fig. 6 is a schematic diagram of the internal structure of Embodiment 4 of the micro-speaker of the present invention—not including the vibration system;
图中：10、外壳，20、球顶，22、振膜，24、音圈，30、导磁板，320、内磁铁，322、外磁铁，340、内华司，342、外华司，360、内环磁，362、外环磁。In the figure: 10, shell, 20, dome, 22, diaphragm, 24, voice coil, 30, magnetic plate, 320, inner magnet, 322, outer magnet, 340, inner huashi, 342, outer huashi, 360, inner ring magnet, 362, outer ring magnet.
具体实施方式detailed description
下面结合附图和实施例，进一步阐述本实用新型。Below in conjunction with accompanying drawing and embodiment, further set forth the utility model.
本说明书中涉及到的内侧指靠近微型扬声器中心的一侧，外侧指远离微型扬声器中心的一侧；本说明书中涉及到的方位上指设有振动系统的方向，方位下指设有磁路系统的方向。The inner side referred to in this manual refers to the side close to the center of the micro-speaker, and the outer side refers to the side away from the center of the micro-speaker; the upper direction referred to in this manual refers to the direction where the vibration system is installed, and the lower direction refers to the direction where the magnetic circuit system is installed. direction.
实施例一：Embodiment one:
如图1和图2共同所示，一种微型扬声器，包括外壳10，外壳10内收容有振动系统和磁路系统，磁路系统为圆形结构。磁路系统包括导磁部件，本实施方式中导磁部件为导磁板30，导磁板30上依次固定有第一磁铁和华司，第一磁铁的充磁方向为垂直方向。第一磁铁包括固定在导磁板30上中心部位的内磁铁320和固定在导磁板30边缘部位的外磁铁322。华司包括固定在内磁铁320上的内华司340和固定在外磁铁322上的外华司342。内磁铁320和内华司340组成磁路系统的内磁路，外磁铁322和外华司342组成磁路系统的外磁路，内磁路与外磁路之间设有磁间隙，振动系统的音圈24的端部位于磁间隙内。As shown in Fig. 1 and Fig. 2 together, a micro-speaker includes a casing 10, a vibrating system and a magnetic circuit system are accommodated in the casing 10, and the magnetic circuit system has a circular structure. The magnetic circuit system includes a magnetically permeable component. In this embodiment, the magnetically permeable component is a magnetically permeable plate 30 on which a first magnet and a washer are sequentially fixed, and the magnetization direction of the first magnet is vertical. The first magnet includes an inner magnet 320 fixed at the center of the magnetic permeable plate 30 and an outer magnet 322 fixed at the edge of the magnetic permeable plate 30 . The washer includes an inner washer 340 fixed on the inner magnet 320 and an outer washer 342 fixed on the outer magnet 322 . The inner magnet 320 and the inner magnet 340 form the inner magnetic circuit of the magnetic circuit system, and the outer magnet 322 and the outer magnet 342 form the outer magnetic circuit of the magnetic circuit system. There is a magnetic gap between the inner magnetic circuit and the outer magnetic circuit, and the vibration system The ends of the voice coil 24 are located within the magnetic gap.
如图1和图2共同所示，第一磁铁上还固定有圆形环状的第二磁铁，第二磁铁与华司均固定在第一磁铁靠近振动系统的一侧表面上，第二磁铁的充磁方向为水平方向，即第二磁铁的充磁方向与第一磁铁的充磁方向相垂直。第二磁铁包括一固定在内磁铁320上的内环磁360，还包括一固定在外磁铁322上的外环磁362。内环磁360固定在内磁铁320靠近磁间隙的边缘部位，内华司340位于内环磁360的内侧。外环磁362固定在外磁铁322靠近磁间隙的边缘部位，外华司342环绕在外环磁362的外侧。As shown in Figure 1 and Figure 2 together, the first magnet is also fixed with a circular ring-shaped second magnet, the second magnet and the washer are fixed on the surface of the first magnet close to the vibration system, the second magnet The magnetization direction of the second magnet is the horizontal direction, that is, the magnetization direction of the second magnet is perpendicular to the magnetization direction of the first magnet. The second magnet includes an inner ring magnet 360 fixed on the inner magnet 320 and an outer ring magnet 362 fixed on the outer magnet 322 . The inner ring magnet 360 is fixed at the edge of the inner magnet 320 close to the magnetic gap, and the Nevas 340 is located inside the inner ring magnet 360 . The outer ring magnet 362 is fixed on the edge of the outer magnet 322 close to the magnetic gap, and the outer washer 342 surrounds the outer side of the outer ring magnet 362 .
第二磁铁位于第一磁铁边缘部位的磁极与第一磁铁的该侧磁极相同，第二磁铁位于第一磁铁中心部位的磁极与第一磁铁的该侧磁极相反。如图1所示：内磁铁320的磁极是下侧为S极，上侧为N极，则内环磁360的外侧(即位于内磁铁320边缘部位的一侧)的磁极为N极，内侧(即位于内磁铁320中心部位且与内华司340相衔接的一侧)的磁极为S极。外磁铁322的磁极是下侧为N极，上侧为S极，则外环磁362的外侧(即位于外磁铁322中心部，且与外华司342相衔接的一侧)的磁极为N极，内侧(即位于外磁铁322边缘部位的一侧)的磁极为S极。此时，第一磁铁的磁场和第二磁铁的磁场会产生叠加，并被导到磁间隙位置，如图3所示，增加了磁间隙处的磁通量密度，大大增加了穿过音圈24的磁力线数量。The magnetic pole of the second magnet located at the edge of the first magnet is the same as the magnetic pole of the side of the first magnet, and the magnetic pole of the second magnet located in the center of the first magnet is opposite to the magnetic pole of the side of the first magnet. As shown in Figure 1: the magnetic pole of inner magnet 320 is the S pole on the lower side, and the N pole on the upper side, then the magnetic pole on the outside of the inner ring magnet 360 (that is, the side that is positioned at the edge of the inner magnet 320) is N pole, and the inner side is N pole. (That is, the magnetic pole located at the central part of the inner magnet 320 and connected to the Nevas 340) is S pole. The magnetic pole of the outer magnet 322 is the N pole on the lower side, and the S pole on the upper side, then the magnetic pole on the outside of the outer ring magnet 362 (that is, the side located at the center of the outer magnet 322 and connected to the outer Huasi 342) is N The magnetic pole of the inner side (that is, the side located at the edge of the outer magnet 322) is the S pole. At this moment, the magnetic field of the first magnet and the magnetic field of the second magnet will produce superimposition, and be led to the magnetic gap position, as shown in Figure 3, have increased the magnetic flux density at the magnetic gap place, have greatly increased through the voice coil 24 The number of magnetic field lines.
如图1所示，振动系统包括边缘部固定在外壳10端面上的振膜22，音圈24固定在振膜22靠近磁路系统的一侧，振膜22另一侧的中心部位固定有球顶20。音圈24受到磁场力的作用，从而根据通过其绕线内的交变电流的大小和方向做往复的上下运动，振膜22和球顶20随着音圈24的上下运动而振动，策动空气发声，从而完成电声之间的能量转换。As shown in Figure 1, the vibration system includes a diaphragm 22 whose edge is fixed on the end face of the casing 10, a voice coil 24 is fixed on the side of the diaphragm 22 close to the magnetic circuit system, and a ball is fixed at the center of the other side of the diaphragm 22. Top 20. The voice coil 24 is affected by the force of the magnetic field, so that it moves up and down reciprocatingly according to the magnitude and direction of the alternating current passing through its winding. Sound, thus completing the energy conversion between electro-acoustic.
实施例二：Embodiment two:
本实施方式与实施例一基本相同，其不同之处在于：This embodiment is basically the same as Embodiment 1, the difference is that:
如图4所示，第二磁铁仅包括固定在外磁铁上的外环磁362，外环磁362固定在外磁铁靠近磁间隙的边缘部位，外华司342环绕在外环磁362的外侧。As shown in FIG. 4 , the second magnet only includes an outer ring magnet 362 fixed on the outer magnet. The outer ring magnet 362 is fixed at the edge of the outer magnet close to the magnetic gap, and the outer washer 342 surrounds the outside of the outer ring magnet 362 .
实施例三：Embodiment three:
本实施方式与实施例一基本相同，其不同之处在于：This embodiment is basically the same as Embodiment 1, the difference is that:
如图5所示，第二磁铁仅包括固定在内磁铁上的内环磁360，内环磁360固定在内磁铁靠近磁间隙的边缘部位，内华司340位于内环磁360的内侧。As shown in FIG. 5 , the second magnet only includes an inner ring magnet 360 fixed on the inner magnet, the inner ring magnet 360 is fixed at the edge of the inner magnet close to the magnetic gap, and the inner ring magnet 340 is located inside the inner ring magnet 360 .
实施例四：Embodiment four:
本实施方式与实施例一、实施例二和实施例三均基本相同，其不同之处在于：This embodiment is basically the same as Embodiment 1, Embodiment 2 and Embodiment 3, and its difference is:
如图6所示，磁路系统为矩形结构，第二磁铁为矩形的环状磁铁。图6仅示出了本实施方式与实施例三相同的结构，本实施方式与实施例一及实施例二相同的结构本领域技术人员根据图2、图4及图6即可很容易的绘出，故关于本实施方式与实施例一及实施例二相同的结构不再单独绘制，以节约本说明书及附图的篇幅。As shown in FIG. 6 , the magnetic circuit system has a rectangular structure, and the second magnet is a rectangular ring magnet. Figure 6 only shows the same structure of this embodiment as that of Embodiment 3, and those skilled in the art can easily draw the structure of this embodiment as that of Embodiment 1 and Embodiment 2 according to Figure 2, Figure 4 and Figure 6 Therefore, structures that are the same as those in Embodiment 1 and Embodiment 2 in this embodiment are not drawn separately to save the length of this description and the accompanying drawings.
实施例五：Embodiment five:
本实施方式与实施例一、实施例二、实施例三和实施例四均基本相同，其不同之处在于：This embodiment is basically the same as Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4, the difference is:
导磁部件为盆架，盆架的中心部位依次固定有第一磁铁和华司，第一磁铁和华司与盆架的侧壁之间设有磁间隙。第二磁铁固定在第一磁铁靠近磁间隙的边缘部位，华司位于第二磁铁的内侧。The magnetically conductive component is a pot frame, and the center part of the pot frame is fixed with a first magnet and a washer in sequence, and a magnetic gap is provided between the first magnet, the washer and the side wall of the pot frame. The second magnet is fixed on the edge of the first magnet close to the magnetic gap, and the washer is located on the inner side of the second magnet.
本实用新型通过在原有的磁铁上增加了水平充磁的环磁，从而改变了原有磁场的方向，有效的增加了磁间隙处磁通量的密度，增加了穿过音圈的磁力线数量，从而提高了微型扬声器的灵敏度，提升了整体的声学性能。The utility model adds a horizontally magnetized ring magnet to the original magnet, thereby changing the direction of the original magnetic field, effectively increasing the density of the magnetic flux at the magnetic gap, and increasing the number of magnetic force lines passing through the voice coil, thereby improving The sensitivity of the micro-speaker is improved, and the overall acoustic performance is improved.
本说明书中涉及到的第一磁铁和第二磁铁的命名仅是为了区别技术特征，并不代表二者之间的位置关系，装配顺序等。The names of the first magnet and the second magnet involved in this specification are only for distinguishing technical features, and do not represent the positional relationship between them, the order of assembly, etc.
本实用新型不局限于上述具体的实施方式，本领域的普通技术人员从上述构思出发，不经过创造性的劳动，所做出的种种变换，均落在本实用新型的保护范围之内。The utility model is not limited to the above-mentioned specific implementation manners, and various transformations made by those skilled in the art starting from the above ideas without creative work all fall within the scope of protection of the utility model.
Claims (8)
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| CN201520812643.6U CN205017577U (en) | 2015-10-19 | 2015-10-19 | Micro loudspeaker |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: GOERTEK Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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Granted publication date: 20160203 |