WO2019200691A1 - 动圈结构及耳机 - Google Patents

动圈结构及耳机 Download PDF

Info

Publication number
WO2019200691A1
WO2019200691A1 PCT/CN2018/092054 CN2018092054W WO2019200691A1 WO 2019200691 A1 WO2019200691 A1 WO 2019200691A1 CN 2018092054 W CN2018092054 W CN 2018092054W WO 2019200691 A1 WO2019200691 A1 WO 2019200691A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper ring
diaphragm
voice coil
moving coil
permanent magnet
Prior art date
Application number
PCT/CN2018/092054
Other languages
English (en)
French (fr)
Inventor
黄晓新
Original Assignee
深圳市蓝禾技术有限公司
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 深圳市蓝禾技术有限公司 filed Critical 深圳市蓝禾技术有限公司
Publication of WO2019200691A1 publication Critical patent/WO2019200691A1/zh

Links

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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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 utility model relates to the technical field of communication, in particular to a moving coil structure and an earphone comprising the same.
  • the moving coil structure promotes the air movement by the action of magnetism and electricity, generates sound waves, has a large sound volume, and has good sound effect, and is widely used in earphones, sounds, microphones, and the like.
  • the existing moving coil structure only has a low frequency band in the vicinity of the copper ring, and most of the middle section is in a high frequency band, so the sound volume is large while the saturation of the low frequency band is insufficient, and the sound quality effect is not ideal.
  • the moving coil structure has a plurality of low frequency bands distributed, and the low frequency band of the earphone applied thereto has high sound saturation and good sound quality.
  • a moving coil structure comprising a diaphragm and a permanent magnet, a voice coil and a copper ring disposed under the diaphragm, the permanent magnet generating a magnetic field to suspend the diaphragm,
  • the inner ring, the middle portion and the outer ring of the diaphragm are respectively fixedly connected to the first copper ring, the voice coil and the second copper ring, and the voice coil generates vibration under the action of different audio signal currents, and the voice coil
  • the vibration and the magnetic field collectively drive the motion of the diaphragm to generate sound waves.
  • first copper ring is disposed coaxially with the second copper ring.
  • the radius of the first copper ring is smaller than the radius of the second copper ring.
  • the voice coil is disposed on a side close to the first copper ring.
  • a bracket is disposed on an outer side of the permanent magnet, and a T-iron is disposed on a bottom and an inner side of the permanent magnet, and a top portion of the permanent magnet includes a pole plate, and the bracket, the T-iron, and the pole plate are surrounded by the bracket
  • the magnetic field is mainly conducted in the direction of the diaphragm.
  • the permanent magnet is a magnetic steel.
  • a moving coil is disposed under the first copper ring, and a first positive and negative poles are disposed at a bottom of the moving coil.
  • the voice coil is provided with a second positive and negative poles that are opposite to the first positive and negative electrodes.
  • a protective cover is disposed above the diaphragm, the protective cover is connected to the bracket, and a bottom of the T iron is provided with a damping net and a circuit board.
  • the utility model also provides an earphone, comprising an ear shell, wherein the ear shell comprises the moving coil structure.
  • the movable ring structure includes a diaphragm and a permanent magnet, a voice coil and a copper ring disposed under the diaphragm, and the permanent magnet generates a magnetic field to suspend the diaphragm.
  • the inner ring, the middle portion and the outer ring of the diaphragm are respectively fixedly connected to the first copper ring, the voice coil and the second copper ring, and the voice coil generates vibration under the action of different audio signal currents, and the voice coil
  • the vibration and the magnetic field collectively drive the motion of the diaphragm to generate sound waves.
  • the setting of the first copper ring can fix the diaphragm, avoiding the vibration of the diaphragm at random, increasing the low frequency band region, and the sound saturation of the low frequency band after the superposition is high, and the sound quality of the earphone is good.
  • FIG. 1 is a schematic view of a moving coil structure according to an embodiment of the present invention.
  • Figure 2 is an exploded view of the moving coil structure shown in Figure 1.
  • Figure 3 is a cross-sectional view showing the structure of the moving coil shown in Figure 1.
  • Figure 4 is a diagram showing the relationship between the structure of the moving coil and the frequency shown in Figure 1.
  • Dynamic structure 100 Diaphragm 10 Permanent magnets 20 Voice coil 30 First copper ring 40 Second copper ring 50 support 60 Plate 70 T iron 80 Dynamic circle 90 First positive and negative 91, 92 Second positive and negative 93, 94 Damping net 95 Circuit board 96 protection cap 97
  • the present invention provides a moving coil structure 100, which has a sounding principle: a voice coil 30 (coil) in a permanent magnetic field is connected to a diaphragm, and a voice coil 30 drives a diaphragm under a signal current drive. 10 voices.
  • the moving coil structure 100 includes a diaphragm 10 and a permanent magnet 20, a voice coil 30 and a copper ring disposed under the diaphragm 10, and the permanent magnet 20 generates a magnetic field to suspend the diaphragm 10, the diaphragm
  • the inner ring, the middle portion and the outer ring of 10 are fixedly connected to the first copper ring 40, the voice coil 30 and the second copper ring 50, respectively, and the voice coil 30 generates vibration under the action of different audio signal currents.
  • the vibration of the ring 30 and the magnetic field collectively drive the motion of the diaphragm 10 to generate sound waves.
  • the diaphragm 10 is an elastic material that moves under the action of a magnetic field and a voice coil 30.
  • the disc is formed in a combination shape, and the voice coil 30 is suspended from the lower portion in the middle portion, and has a "V" shape as shown in a cross-sectional view under the action of gravity.
  • the diaphragm 10 carries the voice coil 30 under the action of the magnetic field and is suspended above the permanent magnet 20, and the inner and outer rings of the diaphragm 10 are respectively composed of the first copper ring 40 and the first
  • the two copper rings 50 are fixed to avoid undesirable resonance caused by the random vibration of the diaphragm 10.
  • the first copper ring 40 is disposed coaxially with the second copper ring 50.
  • the radius of the second copper ring 50 is about 6 times the radius of the first copper ring 40.
  • the first copper ring 40 is The thickness of the second copper ring 50 is equal to the thickness of the second copper ring 50, and a protective cover 97 is disposed above the diaphragm 10.
  • first copper ring 40 and the second copper ring 50 may be disposed non-coaxially; in other embodiments, the thickness of the first copper ring 40 may be greater or smaller than the second The thickness of the copper ring 50; in other embodiments, the radius of the second copper ring 50 is not limited to 6 times the radius of the first copper ring 40; in other embodiments, the number of copper rings may be greater than two. One.
  • the voice coil 30 is a wound coil and is a core component of the moving coil structure 100.
  • the gravity of the voice coil 30 is balanced with the pulling force of the diaphragm 10 under the action of the magnetic field, and the voice coil 30 is suspended below the diaphragm 10;
  • a moving coil 90 is disposed under the copper ring 40.
  • the bottom of the moving coil 90 is provided with a first positive and negative electrode (91, 92), and the voice coil 30 is provided with a second positive and negative electrode (93, 94).
  • the second positive and negative electrodes (93, 94) are connected to the first positive and negative electrodes (91, 92) by wires.
  • the voice coil 30 generates vibrations under the action of different audio signal currents and magnetic fields, and the voice coil 30 is disposed on a side close to the first copper ring 40.
  • the voice coil 30 may be disposed in the middle of the first copper ring 40 and the second copper ring 50, or on a side close to the second copper ring 50, and is not limited to the embodiment.
  • the permanent magnet 20 is disposed under the side of the second copper ring 50 and the voice coil 30, and is disposed in a lower region between the second copper ring 50 and the voice coil 30.
  • the permanent magnet 20 The outer side of the permanent magnet 20 is provided with a T-iron 80, and the top of the permanent magnet 20 includes a plate 70, and the bracket 60, the T-iron 80, and the plate 70 are surrounded by the bracket 70.
  • the magnetic field is mainly conducted in the direction of the diaphragm 10.
  • the permanent magnet 20 is a magnetic steel.
  • the bracket 60 is coupled to the protective cover 97, and the bottom of the T-iron 80 is provided with a damping net 95 and a circuit board 96 (PCBA).
  • PCBA circuit board 96
  • the relative positional relationship between the bracket 60, the T-iron 80, and the electrode plate 70 is not limited.
  • the material of the permanent magnet 20 may also be aluminum, nickel, cobalt, steel, or alloy magnets.
  • the moving coil structure 100 is disposed, and the low frequency is near the copper ring, and the middle portion is high frequency;
  • the frequency distribution of the moving coil structure 100 in the present embodiment is divided, and the frequency is low near the first copper ring 40 and the second copper ring 50, and the peak of the maximum frequency is smaller than the peak value of the existing moving coil structure.
  • the sound mixing of the low frequency band is better than the low frequency sound of the existing moving coil structure.
  • the utility model adopts the above-mentioned moving coil structure 100 to be placed in the ear shell, which is used for listening to music or sound in a low frequency band, and has good sound quality and sound effect.

Abstract

本实用新型提供一种动圈结构，包括振膜及设于所述振膜下方的永磁体、音圈及铜环，所述永磁体产生磁场使所述振膜悬浮，所述振膜的内圈、中部和外圈分别固定连接于第一铜环、所述音圈和第二铜环上，所述音圈在不同音频信号电流作用下产生振动，所述音圈的振动以及所述磁场共同驱动所述振膜的运动而产生声波。第一铜环的设置可固定振膜，避免振膜随意晃动，增大低频段区域，叠加后低频段的声音饱和度高，耳机音质好。

Description

动圈结构及耳机 技术领域
本实用新型涉及通信技术领域，特别是指一种动圈结构及包含该结构的耳机。
 背景技术
动圈结构通过磁和电的作用使振膜推动空气运动，产生声波，具有较大的发音量，扬声效果好，广泛应用于耳机、音响、话筒等。但现有的动圈结构仅在铜环的附近出现低频段，中段绝大部分处于高频段，所以发音量大的同时低频段的饱和度却不够，音质效果不够理想。
 技术问题
鉴于以上内容，有必要提供一种改进的动圈结构及耳机，其动圈结构分布有较多的低频段，应用其的耳机低频段的声音饱和度高，音质好。
 技术解决方案
本实用新型提供的技术方案为：一种动圈结构，包括振膜及设于所述振膜下方的永磁体、音圈及铜环，所述永磁体产生磁场使所述振膜悬浮，所述振膜的内圈、中部和外圈分别固定连接于第一铜环、所述音圈和第二铜环上，所述音圈在不同音频信号电流作用下产生振动，所述音圈的振动以及所述磁场共同驱动所述振膜的运动而产生声波。
进一步地，所述第一铜环与所述第二铜环同轴设置。
进一步地，所述第一铜环的半径小于所述第二铜环的半径。
进一步地，所述音圈设于靠近所述第一铜环的一侧。
进一步地，所述永磁体的外侧设有支架，所述永磁体的底部和内侧设有T铁，所述永磁体的顶部包括极板，在所述支架、T铁、极板的包围作用下，所述磁场主要向所述振膜方向传导。所述永磁体为磁钢。
进一步地，所述第一铜环的下方设有动圈，所述动圈的底部设有第一正负极。
进一步地，所述音圈设有与所述第一正负极相对接的第二正负极。
进一步地，所述振膜的上方设有保护盖，所述保护盖与所述支架连接，所述T铁的底部设置有阻尼网和电路板。
本实用新型还提供一种耳机，包括耳壳，所述耳壳内包括上述动圈结构。
有益效果
与现有技术相比，本实用新型提供的动圈结构包括振膜及设于所述振膜下方的永磁体、音圈及铜环，所述永磁体产生磁场使所述振膜悬浮，所述振膜的内圈、中部和外圈分别固定连接于第一铜环、所述音圈和第二铜环上，所述音圈在不同音频信号电流作用下产生振动，所述音圈的振动以及所述磁场共同驱动所述振膜的运动而产生声波。第一铜环的设置可固定振膜，避免振膜随意晃动，增大低频段区域，叠加后低频段的声音饱和度高，耳机音质好。
 附图说明
下面结合附图和具体实施方式对本实用新型作进一步详细的说明。
图1是本实用新型一实施方式的动圈结构的示意图。
图2是图1所示的动圈结构的分解图。
图3是图1所示的动圈结构的剖视图。
图4是图1所示的动圈结构与频率的分布关系图。
附图标记说明:
动圈结构 100
振膜 10
永磁体 20
音圈 30
第一铜环 40
第二铜环 50
支架 60
极板 70
T铁 80
动圈 90
第一正负极 91、92
第二正负极 93、94
阻尼网 95
电路板 96
保护盖 97
如下具体实施方式将结合上述附图进一步说明本实用新型实施例。
 本发明的实施方式
为了能够更清楚地理解本实用新型实施例的上述目的、特征和优点，下面结合附图和具体实施方式对本实用新型进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本实用新型实施例，所描述的实施方式仅是本实用新型一部分实施方式，而不是全部的实施方式。基于本实用新型中的实施方式，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方式，都属于本实用新型实施例保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本实用新型实施例的技术领域的技术人员通常理解的含义相同。本文中在本实用新型的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本实用新型实施例。
请参阅图1至图3，本实用新型提供一种动圈结构100，其发声原理：在永磁场中的音圈30（线圈）与振膜相连，音圈30在信号电流驱动下带动振膜10发声。
所述动圈结构100包括振膜10及设于所述振膜10下方的永磁体20、音圈30及铜环，所述永磁体20产生磁场使所述振膜10悬浮，所述振膜10的内圈、中部和外圈分别固定连接于第一铜环40、所述音圈30和第二铜环50上，所述音圈30在不同音频信号电流作用下产生振动，所述音圈30的振动以及所述磁场共同驱动所述振膜10的运动而产生声波。
所述振膜10为弹性材料，在磁场和音圈30的作用下运动。本实施方式中呈组合圆盘形，中部下方悬挂有所述音圈30，在重力作用下如剖视图中所示呈“V”形。所述振膜10在所述磁场的作用下承载所述音圈30并悬浮于所述永磁体20的上方，所述振膜10的内外圈分别由所述第一铜环40和所述第二铜环50固定，避免所述振膜10随意晃动导致的不良谐振。所述第一铜环40与所述第二铜环50同轴设置，所述第二铜环50的半径约为所述第一铜环40的半径的6倍，所述第一铜环40的厚度等于所述第二铜环50的厚度，所述振膜10的上方设有保护盖97。
在其他实施方式中，所述第一铜环40与所述第二铜环50可以非同轴设置；在其他实施方式中，所述第一铜环40的厚度可以大于或小于所述第二铜环50的厚度；在其他实施方式中，所述第二铜环50的半径不限定为所述第一铜环40的半径的6倍；在其他实施方式中，铜环的数量可以大于两个。
所述音圈30为卷绕线圈，是动圈结构100的核心部件。一方面，在所述磁场的作用下所述音圈30的重力与所述振膜10的拉力达到平衡，所述音圈30悬挂于所述振膜10下方；另一方面，所述第一铜环40的下方设有动圈90，所述动圈90的底部设有第一正负极（91、92），所述音圈30上设有第二正负极（93、94），所述第二正负极（93、94）与所述第一正负极（91、92）通过导线相连。所述音圈30在不同音频信号电流和磁场的共同作用下产生振动，所述音圈30设于靠近所述第一铜环40的一侧。
在其他实施方式中，所述音圈30可设于所述第一铜环40和所述第二铜环50的正中，或靠近第二铜环50的一侧，不限定为本实施方式。
所述永磁体20设于所述第二铜环50与所述音圈30的侧下方，置于所述第二铜环50与所述音圈30之间的下方区域，所述永磁体20的外侧设有支架60，所述永磁体20的底部和内侧设有T铁80，所述永磁体20的顶部包括极板70，在所述支架60、T铁80、极板70的包围作用下，所述磁场主要向所述振膜10方向传导。所述永磁体20为磁钢。所述支架60与所述保护盖97连接，所述T铁80的底部设置有阻尼网95和电路板96（PCBA）。
在其他实施方式中，所述支架60、T铁80、极板70的相对位置关系不受限定，所述永磁体20的材质还可以是铝、镍、钴、钢或合金磁体等。
请再参阅图4，从动圈结构100与频率的关系图可以看出，仅设置一外侧铜环的现有动圈结构，其靠近铜环处为低频率，中间大部分区域为高频率；本实施方式中的动圈结构100的频率分布出现分割现象，在靠近第一铜环40和第二铜环50处均为低频率，且最大频率的峰值小于现有动圈结构的峰值，进而低频段的声音叠加其饱和度相比于现有动圈结构的低频音效更好。
本实用新型采用上述动圈结构100置于耳壳中制成的耳机，用于聆听低频段的音乐或声音，其音质和音效好。
以上实施方式仅用以说明本实用新型实施例的技术方案而非限制，尽管参照以上较佳实施方式对本实用新型实施例进行了详细说明，本领域的普通技术人员应当理解，可以对本实用新型实施例的技术方案进行修改或等同替换都不应脱离本实用新型实施例的技术方案的精神和范围。
 

Claims (9)

  1. 一种动圈结构，包括振膜及设于所述振膜下方的永磁体、音圈及铜环，其特征在于：所述永磁体产生磁场使所述振膜悬浮，所述振膜的内圈、中部和外圈分别固定连接于第一铜环、所述音圈和第二铜环上，所述音圈在不同音频信号电流作用下产生振动，所述音圈的振动以及所述磁场共同驱动所述振膜的运动而产生声波。
  2. 根据权利要求1所述的动圈结构，其特征在于：所述第一铜环与所述第二铜环同轴设置。
  3. 根据权利要求1所述的动圈结构，其特征在于：所述第一铜环的半径小于所述第二铜环的半径。
  4. 根据权利要求1所述的动圈结构，其特征在于：所述音圈设于靠近所述第一铜环的一侧。
  5. 根据权利要求1所述的动圈结构，其特征在于：所述永磁体的外侧设有支架，所述永磁体的底部和内侧设有T铁，所述永磁体的顶部包括极板，在所述支架、T铁、极板的包围作用下，所述磁场主要向所述振膜方向传导。
  6. 根据权利要求1所述的动圈结构，其特征在于：所述第一铜环的下方设有动圈，所述动圈的底部设有第一正负极。
  7. 根据权利要求6所述的动圈结构，其特征在于：所述音圈设有与所述第一正负极相对接的第二正负极。
  8. 根据权利要求5所述的动圈结构，其特征在于：所述振膜的上方设有保护盖，所述保护盖与所述支架连接，所述T铁的底部设置有阻尼网和电路板。
  9. 一种耳机，包括耳壳，其特征在于：所述耳壳内包括如权利要求1至8中任一项所述的动圈结构。
PCT/CN2018/092054 2018-04-20 2018-06-20 动圈结构及耳机 WO2019200691A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201820583400.3 2018-04-20
CN201820583400.3U CN208143457U (zh) 2018-04-20 2018-04-20 动圈结构及耳机

Publications (1)

Publication Number Publication Date
WO2019200691A1 true WO2019200691A1 (zh) 2019-10-24

Family

ID=64293435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/092054 WO2019200691A1 (zh) 2018-04-20 2018-06-20 动圈结构及耳机

Country Status (2)

Country Link
CN (1) CN208143457U (zh)
WO (1) WO2019200691A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114745625A (zh) * 2022-03-08 2022-07-12 深圳市瑞美声学科技有限公司 一种新型耳机动圈

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201781608U (zh) * 2010-09-13 2011-03-30 富祐鸿科技股份有限公司 同轴喇叭结构
CN105848071A (zh) * 2016-05-24 2016-08-10 青岛歌尔声学科技有限公司 一种耳机扬声器
CN106341760A (zh) * 2016-11-18 2017-01-18 广东欧珀移动通信有限公司 同轴动圈扬声器及耳机
CN206118013U (zh) * 2016-09-26 2017-04-19 常州阿木奇声学科技有限公司 一种扬声器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201781608U (zh) * 2010-09-13 2011-03-30 富祐鸿科技股份有限公司 同轴喇叭结构
CN105848071A (zh) * 2016-05-24 2016-08-10 青岛歌尔声学科技有限公司 一种耳机扬声器
CN206118013U (zh) * 2016-09-26 2017-04-19 常州阿木奇声学科技有限公司 一种扬声器
CN106341760A (zh) * 2016-11-18 2017-01-18 广东欧珀移动通信有限公司 同轴动圈扬声器及耳机

Also Published As

Publication number Publication date
CN208143457U (zh) 2018-11-23

Similar Documents

Publication Publication Date Title
WO2021143118A1 (zh) 一种骨传导扬声器及复合型扬声器
US7317810B2 (en) Magnetic circuit and speaker
JP2008516518A (ja) 二重マグネットを備えた磁気回路及びそれを利用したスピーカーと振動発生装置
WO2015064340A1 (ja) 音声振動発生素子
CN202713598U (zh) 双驱动薄型扬声器
US3649776A (en) Omnidirectional horn loudspeaker
WO2022068081A1 (zh) 发声器及包括该发声器的电子产品
CN104782143A (zh) 同轴扬声器布置
CN110178383A (zh) 桥型边缘方式的高分辨率电磁扬声器
CN107509142B (zh) 一种多功能扬声器
WO2024045238A1 (zh) 振动发声器件
CN109788411A (zh) 一种电声换能器和动圈平板复合扬声器
JPWO2007135746A1 (ja) スピーカ装置
KR101208243B1 (ko) 박형 스피커 및 이를 위한 자기회로
JP2023540061A (ja) 単一の永久磁石と１つまたはそれより多くのボイスコイルとによって駆動されるフラットスピーカー
WO2019200691A1 (zh) 动圈结构及耳机
CN204031441U (zh) 扬声器
CN203896502U (zh) 压电型扬声器
CN200976671Y (zh) 全声扬声器
CN211406274U (zh) 一种骨传导扬声器及复合型扬声器
CN2618396Y (zh) 双体音频扬声器
CN207369273U (zh) 一种辐射音响
CN203313396U (zh) 平板辐射振动扬声器
CN202334875U (zh) 振动扬声器
WO2019200692A1 (zh) 双动结构及耳机

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: 18915096

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: 18915096

Country of ref document: EP

Kind code of ref document: A1