WO2023179489A1 - 一种音箱 - Google Patents

一种音箱 Download PDF

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Publication number
WO2023179489A1
WO2023179489A1 PCT/CN2023/082199 CN2023082199W WO2023179489A1 WO 2023179489 A1 WO2023179489 A1 WO 2023179489A1 CN 2023082199 W CN2023082199 W CN 2023082199W WO 2023179489 A1 WO2023179489 A1 WO 2023179489A1
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WO
WIPO (PCT)
Prior art keywords
passive vibration
speaker
vibration unit
passive
box
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PCT/CN2023/082199
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English (en)
French (fr)
Inventor
岳维勇
Original Assignee
广州视源电子科技股份有限公司
广州视源人工智能创新研究院有限公司
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Application filed by 广州视源电子科技股份有限公司, 广州视源人工智能创新研究院有限公司 filed Critical 广州视源电子科技股份有限公司
Publication of WO2023179489A1 publication Critical patent/WO2023179489A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present application relates to the technical field of audio playback equipment, and in particular to a speaker.
  • some speakers on the market now choose to add a diaphragm to the speaker to create a passive auxiliary speaker structure.
  • the diaphragm is driven by the air pressure of the speaker vibration on the speaker box. Then it vibrates and makes sound.
  • the purpose of this application is to provide a speaker to solve the shortcomings and deficiencies in related technologies.
  • a speaker of this application includes:
  • N is a positive integer
  • the speaker is installed on the upper wall of the box.
  • 2N groups of passive vibration components are evenly distributed on the left and right sides of the speaker.
  • Each group of passive vibration components includes a corresponding first passive vibration unit and a corresponding upper and lower unit.
  • a second passive vibration unit wherein the first passive vibration unit is installed on the upper box wall of the box, and the second passive vibration unit is installed on the lower box wall of the box.
  • the technical solution of this application evenly arranges the passive vibration components on both sides of the speaker, and the passive vibration components are evenly distributed, which can make the overall structure of the speaker more balanced, and the first passive vibration unit and the third passive vibration unit of each group of passive vibration components
  • Two passive vibration units are respectively installed on the upper and lower box walls.
  • the first passive vibration unit and the second passive vibration unit correspond to each other. When they vibrate up and down, they can offset each other's push (pull) force, thus maximizing the weakening.
  • the vibration energy of the speaker and passive vibration component 3 is transmitted to the box, effectively weakening the resonance phenomenon of the box, and the passive vibration component set in this way can also enhance sound radiation and improve the bass sound quality of the speaker.
  • the speakers described in the embodiments of the present application have low manufacturing cost, low vibration, and good sound quality.
  • the speaker is located at the center of the upper box wall.
  • 2N groups of passive vibration components are arranged symmetrically distributed around the speaker.
  • the first passive vibration unit and the second passive vibration unit are both passive radiators.
  • the passive radiator includes a flange and a diaphragm, and the flange is surrounding an edge of the diaphragm.
  • the first passive vibration unit and the second passive vibration unit of each group of the passive vibration components have the same specifications and are arranged symmetrically up and down.
  • the upper box wall and the lower box wall are parallel to each other.
  • Figure 1 is a schematic three-dimensional structural diagram of a speaker provided by an embodiment of the present application.
  • Figure 2 is a schematic three-dimensional structural diagram of a speaker provided by an embodiment of the present application from another perspective;
  • Figure 4 is a schematic three-dimensional structural diagram of a passive vibration unit provided by an embodiment of the present application.
  • Figure 5 is a top view of a speaker provided by an embodiment of the present application.
  • Figure 6 is a schematic cross-sectional view of a speaker provided by an embodiment of the present application.
  • the terms “set”, “connected”, “connected” and “hollow” should be understood in a broad sense.
  • it can be a fixed connection or a fixed connection.
  • It can be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • the specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • this application provides a sound box, which includes a box 1, a speaker 2 and 2N sets of passive vibration components 3 arranged on the box 1, where N is a positive integer.
  • the box 1 in this embodiment is a detachable rectangular structure, which is composed of an upper box shell 11 and a lower box shell 12 installed with each other.
  • the upper box shell 11 and the lower box shell 12 can be connected through screws to ensure the connection strength.
  • the box 1 has opposite upper and lower box walls, opposite left and right box walls, and opposite front and rear box walls.
  • the speaker 2 is installed on the upper wall of the box 1.
  • 2N groups of passive vibration components 3 are evenly distributed on the left and right sides of the speaker 2. That is, N groups of passive vibration components 3 are respectively provided on the left and right sides of the speaker 2, and each group of passive vibration components 3 all include a first passive vibration unit 31 and a second passive vibration unit 32 corresponding up and down, wherein the first passive vibration unit 31 is installed on the upper box wall of the box 1, and the second passive vibration unit 32 is installed on the box 1 on the lower box wall.
  • the technical solution of the present application evenly arranges the passive vibration components 3 on both sides of the speaker 2, and the passive vibration components 3 are evenly distributed, which can make the overall structure of the speaker more balanced, and the first passive vibration unit 31 and the second passive vibration unit 31 of each group of passive vibration components 3
  • the two passive vibration units 32 are respectively arranged on the upper box wall and the lower box wall.
  • the first passive vibration unit 31 and the second passive vibration unit 32 correspond to each other.
  • the speaker according to the embodiment of the present application has low manufacturing cost, small vibration and good sound quality.
  • N is 1, that is, there are two groups of passive vibration components 3, located on the left and right sides of the speaker 2 respectively.
  • N can also be other positive integers, such as 2, 3, 4, etc. etc., as long as they are arranged with reference to the above description, no further details will be given here.
  • the first passive vibration unit 31 and the second passive vibration unit 32 are both passive radiators, which can passively produce sound driven by the speaker 2 to the air in the box 1 .
  • the passive radiator in this embodiment includes a flange 301 and a diaphragm 302.
  • the flange 301 is surrounding the edge of the diaphragm 302.
  • the passive radiator is connected to the speaker box 1 through the flange 301.
  • the passive radiator When the vibration system composed of sound waves in the speaker and the passive radiator resonates at low frequency, the passive radiator will radiate low-frequency sound waves with high efficiency, thereby improving the low-frequency response of the entire speaker, expanding the low-frequency range, and thereby enhancing the bass effect of the speaker. .
  • the speaker 2 is located at the center of the upper box wall so that the pressure on its back can be evenly distributed. to various locations on the speaker.
  • 2N groups of passive vibration components 3 are arranged symmetrically distributed left and right with the speaker 2 as the center, so that the speaker 2 can simultaneously drive the passive vibration components 3 to vibrate during operation, thereby achieving a better vibration reduction effect.
  • the resonance phenomenon of the box 1 is weakened more efficiently.
  • the first passive vibration unit 31 and the second passive vibration unit 32 of each group of passive vibration components 3 have the same specifications and are arranged symmetrically up and down, so that the first passive vibration unit 31 and the second passive vibration unit 32 can completely offset the mutual thrust (pull force) when vibrating up and down, further weakening the resonance phenomenon of the box 1, and also facilitates installation, disassembly and maintenance, which can simplify the assembly steps and reduce the difficulty and cost of maintenance.
  • the upper box wall and the lower box wall are parallel to each other, which can also achieve better vibration damping effect.
  • the position where the first passive vibration unit 31 is installed on the upper box wall is recessed, and the position where the second passive vibration unit 32 is installed on the lower box wall is recessed, thereby preventing the passive vibration unit from protruding after installation.
  • the aesthetics is improved.
  • the speaker 2 includes a basin frame 21 , a U iron 22 , a magnet, a washer 24 , a drum paper 25 , a spring wave 26 and a voice coil 27 .
  • the basin frame 21 forms a receiving cavity, and the basin frame 21 functions as an installation base.
  • the U iron 22, the magnet, the washers 24, the voice coil 27, the drum paper 25 and the elastic wave 26 are all installed in the basin frame 21.
  • the U iron 22 is connected to the bottom center of the basin frame 21 .
  • the magnet includes a main magnet 231 and an auxiliary magnet 232.
  • the main magnet 231, the washers 24 and the auxiliary magnet 232 are stacked in the U iron 22 from bottom to top.
  • the U iron 22, the magnet and the washer 24 together form a magnetic circuit.
  • the magnetic force provided by the magnet can be introduced into the middle hole of the U iron 22 to provide magnetic force.
  • a connecting hole 211 is provided at the center of the bottom of the basin frame 21, and the U iron 22 passes through the connecting hole. 211 and then bonded with the basin frame 21 through glue.
  • the voice coil 27 is arranged in the accommodation cavity; the lower end of the voice coil 27 is set around the outer periphery of the main magnet 231 , the washers 24 and the auxiliary magnet 232 , and is located in the U iron 22 . Therefore, the voice coil 27 can be located in the magnetic circuit, and when the voice coil 27 is energized, it can vibrate, thus cutting the magnetic field lines.
  • the side wall of the basin frame 21 is recessed inward to form a mounting portion 212 for the elastic wave 26 inside the accommodation cavity.
  • the elastic wave 26 is fixedly arranged in the accommodation cavity, and the outer periphery of the elastic wave 26 is fixed on the mounting portion 212 of the elastic wave 26 through glue.
  • the central hole of the elastic wave 26 passes through the voice coil 27, and is fixed with the outer periphery of the voice coil 27 through glue.
  • the drum paper 25 is covered on the basin frame 21, and the upper end of the voice coil 27 and the drum paper 25 are fixed to each other through glue.
  • the voice coil 27 When the voice coil 27 is energized, the voice coil 27 cuts the magnetic field lines and reciprocates (vibrates) up and down along the outer periphery of the magnet and the washer 24, thereby pushing the drum paper 25 to vibrate and emit sound.
  • the elastic wave 26 supports the voice coil 27 to vibrate linearly up and down during the vibration process.

Abstract

本申请提供一种音箱，包括：箱体、扬声器和2N组被动振动组件，N为正整数；所述扬声器安装于所述箱体的上箱壁上，2N组所述被动振动组件均匀分布于所述扬声器的左右侧，所述被动振动组件均包括第一被动振动单元和第二被动振动单元，所述第一被动振动单元安装于所述箱体的上箱壁上，所述第二被动振动单元安装于所述箱体的下箱壁上。本申请的技术方案通过将被动振动组件均匀设置在扬声器的两侧，且每组被动振动组件的第一被动振动单元和第二被动振动单元分别设置于上箱壁和下箱壁，从而最大限度地减弱了扬声器和被动振动组件的振动能量传递至箱体，有效地削弱了箱体的共振现象，还可以增强声音辐射，提高音箱的低音音质。

Description

一种音箱
本申请要求于2022年03月25日提交中国专利局、申请号为CN202220684626.9、实用新型名称为“一种音箱”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及音频播放设备技术领域，特别是涉及一种音箱。
背景技术
现在市面上一些音箱为了提升低频音效和降低风管气流引发的气流声，会选择在音箱上增加振膜做成无源辅射音箱的结构，振膜是依靠音箱上的扬声器振动的空气压力推动后从而振动发声。
在重量较轻的音箱上，由于振膜的振动与扬声器振动不一致，且振膜和扬声器的位置设置不合理，容易引起明显的音箱共振。特别是一些应用于显示类产品的低音音箱，需要配合到整机结构把音箱尺寸做得很薄，此时更容易引起音箱共振，为了解决这些问题一般只有降低扬声器的功率或是增加配重以减少音箱振动，但是这样会导致音效变差或增加成本，无法达到最优的状态。
实用新型内容
本申请的目的在于提供一种音箱，以解决相关技术中的缺点与不足。
本申请的一种音箱，包括：
箱体以及设置于所述箱体上的扬声器和2N组被动振动组件，N为正整数；
所述扬声器安装于所述箱体的上箱壁上，2N组所述被动振动组件均匀分布于所述扬声器的左右侧，每组所述被动振动组件均包括上下对应的第一被动振动单元和第二被动振动单元，其中，所述第一被动振动单元安装于所述箱体的上箱壁上，所述第二被动振动单元安装于所述箱体的下箱壁上。
相对于相关技术，本申请技术方案通过将被动振动组件均匀设置在扬声器的两侧，被动振动组件分布均匀，可以使得音箱整体结构较为平衡，且每组被动振动组件的第一被动振动单元和第二被动振动单元分别设置于上箱壁和下箱壁，第一被动振动单元和第二被动振动单元相互对应，两者在上下振动时可以抵消掉相互的推力(拉力)，从而最大限度地减弱了 扬声器和被动振动组件3的振动能量传递至箱体，有效地削弱了箱体的共振现象，且如此设置的被动振动组件还可以增强声音辐射，提高音箱的低音音质。本申请实施例所述音箱的制造成本低、振动小、音质良好。
在一实施例中，所述扬声器位于所述上箱壁的中心处。
在一实施例中，2N组所述被动振动组件以所述扬声器为中心呈左右对称分布设置。
在一实施例中，所述第一被动振动单元和第二被动振动单元均为无源辐射器。
在一实施例中，所述无源辐射器包括折边和振膜，所述折边围设于所述振膜的边缘。
在一实施例中，每组所述被动振动组件的第一被动振动单元和第二被动振动单元的规格相同，且呈上下对称设置。
在一实施例中，所述上箱壁上安装所述第一被动振动单元的位置呈凹陷设置，所述下箱壁上安装所述第二被动振动单元的位置呈凹陷设置。
在一实施例中，所述上箱壁与所述下箱壁相互平行。
为了更好地理解和实施，下面结合附图详细说明本申请。
附图说明
图1为本申请一个实施例提供的音箱一视角的立体结构示意图；
图2为本申请一个实施例提供的音箱另一视角的立体结构示意图；
图3为本申请一个实施例提供的音箱的爆炸示意图；
图4为本申请一个实施例提供的被动振动单元的立体结构示意图；
图5为本申请一个实施例提供的音箱的俯视图；
图6为本申请一个实施例提供的音箱的剖面示意图；
附图标记：
1、箱体；11、上箱壳；12、下箱壳；2、扬声器；21、盆架；211、连接孔；212、弹
波安装部；22、U铁；231、主磁；232、副磁；24、华司；25、鼓纸；26、弹波；27、音圈；3、被动振动组件；31、第一被动振动单元；32、第二被动振动单元；301、折边；302、振膜。
具体实施方式
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他实施例，都属于本申请保护的范围。
需要理解的是，在本申请的描述中，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量，也即，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。此外，除非另有说明，“多个”的含义是两个或两个以上。
需要说明的是，在本申请的描述中，除非另有明确的规定和限定，术语“设置”、“相连”、“连接”、“空心”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
请参阅图1至图6，本申请提供一种音箱，其包括箱体1以及设置于箱体1上的扬声器2和2N组被动振动组件3，N为正整数。
其中，本实施例箱体1为可拆分的长方体状结构，其由一上箱壳11和一下箱壳12相互安装而成，上箱壳11和下箱壳12可通过螺钉连接保证连接强度，箱体1具有相对的上箱壁和下箱壁、相对的左箱壁和右箱壁、以及相对的前箱壁和后箱壁。
扬声器2安装于箱体1的上箱壁上，2N组被动振动组件3均匀分布于扬声器2的左右侧，即扬声器2的左右侧分别设置有N组被动振动组件3，且每组被动振动组件3均包括上下对应的第一被动振动单元31和第二被动振动单元32，其中，第一被动振动单元31安装于箱体1的上箱壁上，第二被动振动单元32安装于箱体1的下箱壁上。扬声器2在振动发声时，箱体1内的空气压力发生变化，从而带动第一被动振动单元31和第二被动振动单元32振动。
本申请技术方案通过将被动振动组件3均匀设置在扬声器2的两侧，被动振动组件3分布均匀，可以使得音箱整体结构较为平衡，且每组被动振动组件3的第一被动振动单元31和第二被动振动单元32分别设置于上箱壁和下箱壁，第一被动振动单元31和第二被动振动单元32相互对应，两者在上下振动时可以抵消掉相互的推力(拉力)，从而最大限度地减弱了扬声器2和被动振动组件3的振动能量传递至箱体1，有效地削弱了箱体1的共振现象，且如此设置的被动振动组件3还可以增强声音辐射，提高音箱的低音音质。本申请实施例音箱的制造成本低、振动小、音质良好。
在本实施例中，N为1，即被动振动组件3设置有两组，分别位于扬声器2的左右侧，在其他一些实施例中，N也可以为其他正整数，例如2、3、4等等，只要参照上述描述来布置即可，在此不作赘述。在本实施例中，第一被动振动单元31和第二被动振动单元32均为无源辐射器，其可在扬声器2对箱体1内空气的带动下进行被动发声。如图4所示，本实施例无源辐射器包括折边301和振膜302，折边301围设于振膜302的边缘，无源辐射器通过折边301连接于音箱的箱体1。当音箱内声波与无源辐射器构成的振动系统在低频发生谐振时，无源辐射器会高效率的辐射出低频声波，从而提高整个音箱的低频响应，拓展低频范围，从而增强音箱的低音效果。
为了使得音箱整体结构更为平衡，进一步地减少音箱在发声时的振动，在一实施例中，如图5所示，扬声器2位于上箱壁的中心处，从而使其背面的压力能均匀分布到音箱的各个位置。在一实施例中，2N组被动振动组件3以扬声器2为中心呈左右对称分布设置，以使扬声器2在工作时能够同时带动被动振动组件3进行振动，从而起到更好地减振效果，更高效地削弱了箱体1的共振现象。在一实施例中，每组被动振动组件3的第一被动振动单元31和第二被动振动单元32的规格相同，且呈上下对称设置，从而使第一被动振动单元31和第二被动振动单元32在上下振动时可以彻底抵消掉相互的推力(拉力)，进一步削弱了箱体1的共振现象，同时也方便安装和拆卸维修，能够简化组装步骤和降低维修难度和成本。另外，上箱壁与下箱壁相互平行，也可以起到更好地减振效果。
在一实施例中，上箱壁上安装第一被动振动单元31的位置呈凹陷设置，下箱壁上安装第二被动振动单元32的位置呈凹陷设置，从而避免被动振动单元在安装后凸出于箱体1，提高了美观性。
如图6所示，在本实施例中，扬声器2包括盆架21、U铁22、磁体、华司24、鼓纸25、弹波26以及音圈27。
盆架21形成一容置腔，盆架21起到安装基座的作用，U铁22、磁体、华司24、音圈27、鼓纸25以及弹波26均安装于盆架21内。
其中，U铁22连接于盆架21的底部中心处。磁体包括主磁231和副磁232，主磁231、华司24和副磁232依次从下至上叠放于U铁22内。U铁22、磁体和华司24共同形成一个磁路，磁体提供的磁力可以导入U铁22的中孔以提供磁力，盆架21底部中心处设有一连接孔211，U铁22穿过连接孔211后通过胶水与盆架21粘合。
音圈27设于容置腔内；音圈27下端套设主磁231、华司24和副磁232的外周，并位于U铁22内。由此，音圈27可以位于磁路中，当音圈27通电时，便可产生振动，从而切割磁场线。盆架21侧壁向内凹陷以在容置腔内部形成一弹波26安装部212，弹波26固定设置于容置腔内，弹波26的外周通过胶水固定于弹波26安装部212上，弹波26的中心孔穿过音圈27，并与音圈27的外周通过胶水贴合固定。鼓纸25盖设于盆架21上，音圈27的上端与鼓纸25通过胶水相互固定。
当音圈27通电后时，音圈27切割磁场线，沿磁体和华司24的外周上下往复运动(振动)，从而推动鼓纸25振动，发出声音。弹波26在振动过程中支撑音圈27作上下线性振动。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对实用新型专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。

Claims (8)

  1. 一种音箱，其中，包括：
    箱体以及设置于所述箱体上的扬声器和2N组被动振动组件，N为正整数；
    所述扬声器安装于所述箱体的上箱壁上，2N组所述被动振动组件均匀分布于所述扬声器的左右侧，每组所述被动振动组件均包括上下对应的第一被动振动单元和第二被动振动单元，其中，所述第一被动振动单元安装于所述箱体的上箱壁上，所述第二被动振动单元安装于所述箱体的下箱壁上。
  2. 根据权利要求1所述的音箱，其中：
    所述扬声器位于所述上箱壁的中心处。
  3. 根据权利要求2所述的音箱，其中：
    2N组所述被动振动组件以所述扬声器为中心呈左右对称分布设置。
  4. 根据权利要求1所述的音箱，其中：
    所述第一被动振动单元和第二被动振动单元均为无源辐射器。
  5. 根据权利要求4所述的音箱，其中：
    所述无源辐射器包括折边和振膜，所述折边围设于所述振膜的边缘。
  6. 根据权利要求1所述的音箱，其中：
    每组所述被动振动组件的第一被动振动单元和第二被动振动单元的规格相同，且呈上下对称设置。
  7. 根据权利要求1所述的音箱，其中：
    所述上箱壁上安装所述第一被动振动单元的位置呈凹陷设置，所述下箱壁上安装所述第二被动振动单元的位置呈凹陷设置。
  8. 根据权利要求1-7任一项所述的音箱，其中：
    所述上箱壁与所述下箱壁相互平行。
PCT/CN2023/082199 2022-03-25 2023-03-17 一种音箱 WO2023179489A1 (zh)

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