WO2021003602A1 - 激励器 - Google Patents

激励器 Download PDF

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Publication number
WO2021003602A1
WO2021003602A1 PCT/CN2019/094871 CN2019094871W WO2021003602A1 WO 2021003602 A1 WO2021003602 A1 WO 2021003602A1 CN 2019094871 W CN2019094871 W CN 2019094871W WO 2021003602 A1 WO2021003602 A1 WO 2021003602A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
magnetic bowl
coil
exciter
bowl
Prior art date
Application number
PCT/CN2019/094871
Other languages
English (en)
French (fr)
Inventor
严绪东
韩文亚
刘威
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/094871 priority Critical patent/WO2021003602A1/zh
Priority to CN201921052795.5U priority patent/CN210093531U/zh
Priority to US16/994,704 priority patent/US11515068B2/en
Publication of WO2021003602A1 publication Critical patent/WO2021003602A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/086—Structural details of the armature
    • 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
    • H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities

Definitions

  • This application relates to the technical field of exciters, and in particular to an exciter for screen sound.
  • this application provides a method that can suppress excessive coil impedance at high frequencies and improve high-frequency performance The exciter.
  • An exciter comprising an upper magnetic bowl with a first accommodating space, a lower magnetic bowl with a second accommodating space arranged opposite to the upper magnetic bowl, a first magnet accommodated in the first accommodating space, and a housing
  • the second magnet, the conductor core and the coil in the second accommodating space the upper magnetic bowl has a first open end facing the lower magnetic bowl, and the lower magnetic bowl has a connection with the first open end Opposite to the second open end
  • the lower magnetic bowl includes a bottom wall opposite to the second open end
  • the conductor core is fixed on the bottom wall
  • the coil is sleeved on the conductor magnet
  • the second magnet is arranged at intervals on the circumferential side of the coil
  • the exciter further includes a copper ring, the copper ring is sleeved on the conductor core and sandwiched between the conductor core and Between the coils.
  • the number of the second magnets is two, and the two second magnets are symmetrically arranged on opposite sides of the coil.
  • the second magnet is magnetized along the vibration direction, and the magnetization directions of the two second magnets are the same.
  • the first magnet is magnetized along the vibration direction, and is opposite to the magnetization direction of the second magnet.
  • the first magnet and the second magnet are both permanent magnets.
  • the projection of the second magnet along the vibration direction and the projection of the first magnet along the vibration direction at least partially overlap.
  • the lower magnetic bowl further includes a side wall bent and extended from the bottom wall toward the upper magnetic bowl
  • the exciter further includes an elastic piece connecting the upper magnetic bowl and the lower magnetic bowl, so The elastic sheet is fixedly connected between the side wall and the upper magnetic bowl.
  • the shrapnel is an annular shrapnel.
  • the winding direction of the coil is along the vibration direction.
  • the exciter provided by the present application can suppress the coil impedance from being too large at high frequency by sandwiching the copper ring between the conductor core and the coil, thereby improving the high frequency performance of the exciter and having high product reliability.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of Embodiment 1 of an exciter provided by this application;
  • FIG 2 is an exploded schematic diagram of the exciter shown in Figure 1;
  • Figure 3 is a cross-sectional view of the exciter shown in Figure 1 along line III-III;
  • FIG. 4 is a cross-sectional view of the upper magnetic bowl and the lower magnetic bowl in the exciter shown in FIG. 3;
  • Fig. 6 is an exploded schematic diagram of the exciter shown in Fig. 5;
  • Fig. 7 is a cross-sectional view of the exciter shown in Fig. 5 along the line VII-VII.
  • this embodiment provides an exciter 100, which includes an upper magnetic bowl 1 having a first accommodating space 10, which is arranged opposite to the upper magnetic bowl 1 and has a second accommodating space 20
  • the lower magnetic bowl 2 the first magnet 3 accommodated in the first accommodation space 10, and the second magnet 4, the conductor core 5, the coil 6 and the copper ring 7 accommodated in the second accommodation space 20.
  • the upper magnetic bowl 1 includes a top wall 11, a side plate 12 bent and extended from the top wall 11 toward the lower magnetic bowl 2, and the side plate 12 cooperates with the top wall 11 to form an open end The first containing space 10.
  • the open end of the first accommodating space 10 is defined as the first open end 14, and the one open end 14 is arranged on the lower magnetic bowl 2.
  • the lower magnetic bowl 2 includes a bottom wall 21 and a side wall 22 bent and extended from the bottom wall 21 toward the upper magnetic bowl 1, and the side wall 22 cooperates with the bottom wall 21 to form an open end. Mentioned second accommodation space 20.
  • the open end of the first accommodating space 20 is defined as a second open end 24, and the second open end 24 is arranged directly opposite to the upper magnetic bowl 1.
  • the first magnet 3 is fixed to the top wall 11 and located in the first receiving space 10.
  • the conductor core 5 is fixed to the bottom wall 21 and located in the second receiving space 20.
  • the coil 6 is sleeved on the conductor core 5.
  • the utilization rate of the magnetic circuit can be significantly improved.
  • the second magnets 4 are arranged at intervals on the circumferential side of the coil 6.
  • the number of the second magnets 4 is two, and the two second magnets 4 are symmetrically arranged on opposite sides of the coil 6. It can be understood that the number of the second magnet 4 is not limited to two, as long as the design is symmetrically spaced on the circumferential side of the coil 6 is feasible.
  • the second magnet 4 can also be Ring magnet.
  • the copper ring 7 is sleeved on the conductor core 5 and sandwiched between the conductor core 5 and the coil 6.
  • both the first magnet 3 and the second magnet 4 are magnetized along the vibration direction, and the magnetization directions of the second magnet 4 and the two second magnets 3 are opposite, and the two magnets The magnetizing direction of the second magnet 4 is the same.
  • the winding direction of the coil 6 is along the vibration direction.
  • the first magnet 3 will generate an attractive force on the magnetic conductor core 5 and the lower magnetic bowl 2, and the first magnet 3 and the second magnet 4 are opposite to each other to generate repulsive force, so that the exciter 100 is in a balanced state; after the coil 6 is energized, by adjusting the energizing direction of the coil 6, the upward or downward force generated by the coil 6 breaks the equilibrium state, causing the exciter 100 to vibrate.
  • the projection of the second magnet 4 in the direction of vibration and the projection of the first magnet 3 in the direction of vibration at least partially overlap to enhance the repulsive force of the interaction of the second magnet 4 and the first magnet 3 in the direction of vibration .
  • the first magnet 3 and the second magnet 4 are both permanent magnets.
  • FIG. 5 to FIG. 7 for a schematic diagram of the second embodiment of the exciter provided in this application.
  • the structure of the second embodiment is the same as that of the first embodiment.
  • the main difference is that the exciter 200 provided in this embodiment further includes an elastic piece 8 connecting the upper magnetic bowl 1 and the lower magnetic bowl 2.
  • the elastic sheet 8 is fixedly connected between the side wall 22 and the upper magnetic bowl 1.
  • one end of the elastic piece 8 is fixedly connected to the side wall 22 of the lower magnetic bowl 2, and the other end is fixedly connected to the side plate 12 of the upper magnetic bowl 1.
  • the repulsive force between the first magnet 3 and the second magnet 4 is slightly greater than the attractive force between the first magnet 3 and the magnetic core 5 and the lower magnetic bowl 2, which reduces the damage to the screen by the attractive force.
  • An elastic piece 8 is added between the upper magnetic bowl 1 and the lower magnetic bowl 2 to make the exciter 200 in a state of force balance in the vibration direction, thereby improving the reliability of the exciter 200.
  • the elastic sheet 8 is an annular elastic sheet.
  • the other structure of the exciter 200 is substantially the same as that of the exciter 100 in the first embodiment, and will not be repeated here.
  • the exciter provided by the present application can suppress the coil impedance from being too large at high frequency by sandwiching the copper ring between the conductor core and the coil, thereby improving the high frequency performance of the exciter and having high product reliability.

Abstract

一种激励器（100），包括具有第一收容空间（10）的上磁碗（1）以及与上磁碗（1）相对间隔设置且具有第二收容空间（20）的下磁碗（2），还包括收容于第一收容空间（10）内第一磁体（3）以及收容于第二收容空间（20）的第二磁体（4）、导磁铁芯（5）、铜环（7）及具有收容空腔的线圈（6）。第二磁体（4）间隔设置于线圈（6）的外侧。铜环（7）套设于导磁铁芯（5）上并夹设于导磁铁芯（5）与线圈（6）之间。第一磁体（3）与第二磁体（4）通交流电同极相对，获得斥力。在下磁碗（2）中线圈（6）内侧放置铜环（7），可以抑制在高频时激励器（100）电阻抗的明显上升，改善激励器（100）的性能。

Description

激励器 技术领域
本申请涉及激励器技术领域，尤其是涉及一种用于屏幕发声的激励器。
 背景技术
随着互联网时代的到来，越来越多的电子设备也逐步占据每个人的生活，包括方便携带的手机，手机的功能也越来越多样，其中手机的高品质发声功能也是人们选购手机时重点考虑的功能之一。目前，随着触屏手机的开发，越来越多的屏幕发声器也开始应用于智能手机，屏幕发声智能手机，使耳朵贴近屏幕任何一处即可听到高音质声音，这样既方便了接听又使通话效果更加清晰。而激励器作为发声器件是实现屏幕发声的关键组成部分，随着屏幕发声技术的快速应用，高性能的激励器也变的尤为重要。
然而相关技术的激励器中，为了提高磁路的利用率，通常在线圈内侧设置有导磁铁芯，但是高频时，由于导磁铁芯的存在，线圈阻抗急剧增大，影响激励器性能，降低了高频辐射。
因此，有必要提供一种改进的激励器来解决上述问题。
 技术问题
针对相关技术中激励器的导磁铁芯在高频时易使线圈阻抗急剧增大，进而降低高频辐射的技术问题，本申请提供一种可以抑制高频时线圈阻抗过大，改善高频性能的激励器。
 技术解决方案
一种激励器，包括具有第一收容空间的上磁碗、与所述上磁碗相对间隔设置且具有第二收容空间的下磁碗、收容于所述第一收容空间内第一磁体以及收容于所述第二收容空间的第二磁体、导磁铁芯和线圈，所述上磁碗具有正对所述下磁碗的第一开口端，所述下磁碗具有与所述第一开口端相对设置的第二开口端，所述下磁碗包括与所述第二开口端相对设置的底壁，所述导磁铁芯固定于所述底壁上，所述线圈套设于所述导磁铁芯上，所述第二磁体间隔设置于所述线圈的周侧，所述激励器还包括铜环，所述铜环套设于所述导磁铁芯上并夹设于所述导磁铁芯与所述线圈之间。
优选的，所述第二磁体的数量为两个，两个所述第二磁体对称设置于所述线圈的相对两侧。
优选的，所述第二磁体沿振动方向充磁，且两个所述第二磁体的充磁方向相同。
优选的，所述第一磁体沿振动方向充磁，且与所述第二磁体的充磁方向相反。
优选的，所述第一磁体与所述第二磁体均为永磁体。
优选的，所述第二磁体沿振动方向的投影与所述第一磁体沿振动方向的投影至少部分重叠。
优选的，所述下磁碗还包括自所述底壁朝向所述上磁碗弯折延伸的侧壁，所述激励器还包括连接所述上磁碗和所述下磁碗的弹片，所述弹片固定连接于所述侧壁与所述上磁碗之间。
优选的，所述弹片为环形弹片。
优选的，所述线圈的绕线方向沿振动方向。
 有益效果
与相关技术相比，本申请提供的激励器通过在导磁铁芯与线圈之间夹设铜环，可以抑制高频时线圈阻抗过大，从而改善激励器的高频性能，产品可靠性高。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本申请提供的激励器实施例一立体结构示意图；
图2为图1所示激励器的分解示意图；
图3为图1所示激励器沿III-III线的剖视图；
图4为图3所示激励器中上磁碗和下磁碗的剖面图；
图5为本申请提供的激励器实施例二的立体结构示意图；
图6为图5所示激励器的分解示意图；
图7为图5所示激励器沿VII-VII线的剖视图。
 本发明的最佳实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
实施例一
请结合参阅图-图4，本实施例提供一种激励器100，其包括具有第一收容空间10的上磁碗1、与所述上磁碗1相对间隔设置且具有第二收容空间20的下磁碗2、收容于所述第一收容空间10内的第一磁体3、以及收容于所述第二收容空间20的第二磁体4、导磁铁芯5、线圈6和铜环7。
所述上磁碗1包括顶壁11、自所述顶壁11朝向所述下磁碗2弯折延伸的侧板12，所述侧板12与所述顶壁11配合围成一端开口的的所述第一收容空间10。为了便于描述，将所述第一收容空间10的开口端定义为第一开口端14，所述一开口端正14对所述下磁碗2设置。
所述下磁碗2包括底壁21和自所述底壁21朝向所述上磁碗1弯折延伸的侧壁22，所述侧壁22与所述底壁21配合围成一端开口的所述第二收容空间20。为了便于描述，将所述第一收容空间20的开口端定义为第二开口端24，所述第二开口端24正对所述上磁碗1设置。
所述第一磁体3固定于所述顶壁11并位于所述第一收容空间10内。
所述导磁铁芯5固定于所述底壁21并位于所述第二收容空间20内。
所述线圈6套设于所述导磁铁芯5上。通过在所述线圈6内侧设置所述导磁铁芯5，可显著提高磁路的利用率。
所述第二磁体4间隔设置于所述线圈6的周侧。在本实施例中，所述第二磁体4的数量为两个，两个所述第二磁体4对称设置于所述线圈6的相对两侧。可以理解的是，所述第二磁体4的数量并不局限于两个，只要对称间隔设置于所述线圈6的周侧的设计都是可行的，当然，所述第二磁体4还可以是环状磁体。
所述铜环7套设于所述导磁铁芯5上并夹设于所述导磁铁芯5与所述线圈6之间。采用该结构设计，可以抑制高频时所述线圈6阻抗过大，从而改善激励器100的高频性能。
在本实施例中，所述第一磁体3和第二磁体4均沿振动方向充磁，且所述第二磁体4与两个所述第二磁体3的充磁方向相反，两个所述第二磁体4的充磁方向相同。
优选地，所述线圈6的绕线方向沿振动方向。当所述线圈6未通电时，第一磁体3会对所述导磁铁芯5和下磁碗2产生吸引力，而第一磁体3与第二磁体4同极相对而产生斥力，使得激励器100处于平衡状态；所述线圈6通电后，通过调整所述线圈6的通电方向，使得所述线圈6产生向上或者向下的作用力打破了平衡状态，使得激励器100产生振动。优选地，所述第二磁体4沿振动方向的投影与所述第一磁体3沿振动方向的投影至少部分重叠，增强所述第二磁体4及第一磁体3在振动方向上相互作用的斥力。进一步地，所述第一磁体3和所述第二磁体4均为永磁体。
实施例二
请结合参阅图5-图7，为本申请提供的激励器的第二种实施方式的示意图。实施例二的结构与实施例一整体相同，主要区别点在于：本实施例提供的激励器200还包括连接所述上磁碗1和所述下磁碗2的弹片8。所述弹片8固定连接于所述侧壁22与所述上磁碗1之间。
具体地，所述弹片8一端与所述下磁碗2的侧壁22固定连接，另一端与所述上磁碗1的侧板12固定连接。此时，第一磁体3与第二磁体4之间的斥力稍大于第一磁体3与导磁铁芯5和下磁碗2之间的吸引力，减小了吸引力对屏幕的损伤，通过在所述上磁碗1与所述下磁碗2之间增设弹片8，使得激励器200在振动方向上处于力平衡的状态，从而提高所述激励器200的可靠性。优选地，所述弹片8为环形弹片。
所述激励器200的其他结构与实施例一的激励器100大致相同，在此不再赘述。
与相关技术相比，本申请提供的激励器通过在导磁铁芯与线圈之间夹设铜环，可以抑制高频时线圈阻抗过大，从而改善激励器的高频性能，产品可靠性高。
本领域的技术人员容易理解，以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。
 本发明的实施方式
在此处键入本发明的实施方式描述段落。
 工业实用性
在此处键入工业实用性描述段落。
 序列表自由内容
在此处键入序列表自由内容描述段落。

Claims (10)

  1. 一种激励器，包括具有第一收容空间的上磁碗、与所述上磁碗相对间隔设置且具有第二收容空间的下磁碗、收容于所述第一收容空间内的第一磁体、以及收容于所述第二收容空间的第二磁体、导磁铁芯和线圈，所述上磁碗具有正对所述下磁碗的第一开口端，所述下磁碗具有与所述第一开口端相对设置的第二开口端，所述下磁碗包括与所述第二开口端相对设置的底壁，所述导磁铁芯固定于所述底壁上，所述线圈套设于所述导磁铁芯上，所述第二磁体间隔设置于所述线圈的周侧，其特征在于，所述激励器还包括铜环，所述铜环套设于所述导磁铁芯上并夹设于所述导磁铁芯与所述线圈之间。
  2. 根据权利要求1所述的激励器，其特征在于，所述第二磁体的数量为两个，两个所述第二磁体对称设置于所述线圈的相对两侧。
  3. 根据权利要求2所述的激励器，其特征在于，所述第二磁体沿振动方向充磁，且两个所述第二磁体的充磁方向相同。
  4. 根据权利要求1所述的激励器，其特征在于，所述第一磁体沿振动方向充磁，且与所述第二磁体的充磁方向相反。
  5. 根据权利要求1所述的激励器，其特征在于，所述第一磁体和所述第二磁体均为永磁体。
  6. 根据权利要求1所述的激励器，其特征在于，所述第二磁体沿振动方向的投影与所述第一磁体沿振动方向的投影至少部分重叠。
  7. 根据权利要求1所述的激励器，其特征在于，所述下磁碗还包括自所述底壁朝向所述上磁碗弯折延伸的侧壁，所述激励器还包括连接所述上磁碗和所述下磁碗的弹片，所述弹片固定连接于所述侧壁与所述上磁碗之间。
  8. 根据权利要求7所述的激励器，其特征在于，所述弹片为环形弹片。
  9. 根据权利要求1所述的激励器，其特征在于，所述线圈的绕线方向沿振动方向。
  10. 在此处键入权利要求项10。
PCT/CN2019/094871 2019-07-05 2019-07-05 激励器 WO2021003602A1 (zh)

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