WO2022041438A1 - Caisson de haut-parleur - Google Patents

Caisson de haut-parleur Download PDF

Info

Publication number
WO2022041438A1
WO2022041438A1 PCT/CN2020/123573 CN2020123573W WO2022041438A1 WO 2022041438 A1 WO2022041438 A1 WO 2022041438A1 CN 2020123573 W CN2020123573 W CN 2020123573W WO 2022041438 A1 WO2022041438 A1 WO 2022041438A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
upper cover
lower cover
positioning boss
unit
Prior art date
Application number
PCT/CN2020/123573
Other languages
English (en)
Chinese (zh)
Inventor
吴军
印兆宇
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)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, 瑞声光电科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022041438A1 publication Critical patent/WO2022041438A1/fr

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
    • H04R1/02—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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • 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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to a speaker box used in portable mobile electronic products.
  • Speaker boxes are widely used in portable mobile electronic products, such as mobile phones, to realize the conversion of audio signals into sound playback.
  • the speaker box has high loudness and amplitude.
  • the speaker box of the related art includes a housing with an accommodation space and a sound-emitting unit fixedly accommodated in the accommodation space. Since the casing is generally made of plastic material, it is mainly made by injection molding. In addition, the sound-emitting unit is assembled. When the body is installed, it is necessary to encapsulate the sound-emitting monomer on the shell by ultrasonic welding.
  • the casing in order to realize the ultrasonic welding between the sounding unit and the casing, the casing must have a certain large thickness to ensure the ultrasonic welding between the sounding unit and the casing is firm, and the overall size remains unchanged. In this case, due to the large thickness of the casing, the casing occupies a large volume of the rear acoustic cavity, which limits the volume design of the rear acoustic cavity.
  • the purpose of the present invention is to provide a speaker box, which solves the problem that the shell occupies a large volume of the rear acoustic cavity and limits the volume design of the rear acoustic cavity.
  • the present invention provides a speaker box, which includes a casing with a receiving space and a sound-emitting unit partially received and fixed in the receiving space, the casing includes an upper cover and a cover disposed on the upper cover and together form a lower cover of the receiving space, the sound-generating unit includes a vibrating membrane for vibrating and sounding;
  • the upper cover includes an upper-cover extension wall fixedly connected with the lower cover, extending from the upper cover a main body part whose wall is bent and extended toward the sounding unit, the main body part is provided with a sounding port that leaks out of the diaphragm;
  • the sounding unit is provided with a positioning boss;
  • the bases are all metal materials, and the sound-generating unit is welded and fixed to the main body through the positioning boss;
  • the lower cover is located on the side of the sound-generating unit away from the diaphragm and extends from the upper cover
  • the wall forms a seal, and the upper cover, the lower cover
  • the main body portion includes an upper cover plate provided with the sound-emitting port and a support portion that is bent and extended from the inner side of the upper cover plate to the sound-emitting unit, and the positioning boss is welded and fixed to the sound-emitting unit. support.
  • the sound-emitting unit is partially exposed to the accommodating space through the sound-emitting port.
  • the support portion includes a support wall that is bent and extended from the inner side of the upper cover plate to the lower cover, and a side of the support wall that is far away from the upper cover plate is bent and extended to the sounding unit.
  • the positioning boss is welded and fixed to the side of the flange close to the lower cover.
  • the outer peripheral side of the sound-generating unit is spaced from the support wall, the sound-generating unit, the flange and the support wall together form a glue container, and the outer peripheral side of the sound-generating unit is spaced from the supporting wall.
  • a seal is formed between the support walls by applying glue in the glue container.
  • the sound-generating unit includes a basin frame, a vibration system supported and fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound.
  • the upper splint is formed by protruding and extending from the upper splint to the direction away from the basin frame.
  • the positioning bosses include at least two and are spaced apart from each other.
  • the positioning boss is annular.
  • the lower cover includes a lower cover that is located on a side of the sound-generating unit away from the vibrating membrane and is spaced from the sound-generating unit, and is bent toward the upper cover from a peripheral edge of the lower cover
  • the extended lower cover extension wall abuts against the upper cover extension wall and forms a welding seal with the upper cover extension wall.
  • the speaker box further includes a ventilating spacer located in the rear acoustic cavity and covering a side of the sound-emitting device away from the vibrating membrane, the ventilating spacer including a spaced apart from the lower cover.
  • the spacer fixing part is fixed on the positioning boss, and the spacer fixing part and the peripheral side of the sounding unit are glued to form a seal, and the air-permeable spacer and the shell together form a powder filling space .
  • the upper cover includes an upper cover extension wall that is fixedly connected with the lower cover, and a main body portion that is bent and extended from the upper cover extension wall to the sound-emitting unit.
  • the sound-emitting port of the membrane, the sound-generating unit is provided with a positioning boss; the shell and the positioning boss are all metal materials, and the sound-generating unit is welded and fixed to the main body through the positioning boss; the lower cover is located on the side of the sound-generating unit away from the diaphragm It forms a seal with the extension wall of the upper cover, and the upper cover, the lower cover and the sounding unit together form a rear sound cavity; in the above structure, the shell and the positioning boss are both metal materials, and the two are welded and fixed by metal welding.
  • Fig. 1 is the three-dimensional structure schematic diagram of the speaker box of the present invention
  • Fig. 2 is the partial three-dimensional structure exploded schematic diagram of the speaker box of the present invention
  • FIG. 3 is a schematic exploded schematic diagram of a partial three-dimensional structure of the speaker box of the present invention from another angle;
  • FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 1 .
  • the present invention provides a speaker box 100 , which includes a casing 1 and a sound-generating unit 2 .
  • the housing 1 has a receiving space 10 , and the sounding unit 2 is fixedly supported on the housing 1 .
  • the sound-generating unit 2 is fixedly accommodated in the receiving space 10 for vibrating and sounding; specifically, the sound-generating unit 2 includes a basin frame 21 .
  • the vibration system 22 includes a diaphragm 221 fixed to the basin frame 21 for vibrating and producing sound, and a voice coil (not shown) connected to the diaphragm.
  • the magnetic circuit system 23 includes a magnetic yoke 231 fixed on the side of the basin frame 21 away from the diaphragm 221 , a magnetic steel unit 232 fixed and supported on the magnetic yoke 231 and forming a magnetic gap, and a magnetic steel unit 232 embedded and fixed on the basin frame 21 and covered on the magnetic steel.
  • the unit 232 is away from the upper plate 233 at one end of the magnetic yoke 231 , and the voice coil is inserted in the magnetic gap for driving the diaphragm 221 to vibrate and produce sound.
  • the sound-generating unit 2 is provided with a positioning boss 20.
  • the positioning boss 20 is formed by the upper clamping plate 233 along the vertical direction of the vibration.
  • the vibration direction of the membrane 221 is formed to protrude and extend in a direction away from the basin frame 21 .
  • the positioning boss is directly formed by protruding and extending from the side of the basin frame close to the magnetic circuit system.
  • the specific number and structural form of the positioning bosses 20 are not limited.
  • the positioning bosses 20 include at least two and are spaced apart from each other. More specifically, in this embodiment, There are two positioning bosses 20 protruding and extending on opposite sides of the upper clamping plate 233 along the vibration direction.
  • the number of the positioning bosses may be set according to actual requirements, and the positioning bosses may also be set as annular structures.
  • the casing 1 has a split structure. Specifically, the casing 1 includes an upper cover 11 and a lower cover 12 which is covered on the upper cover 11 and together form the receiving space 10 .
  • the upper cover 11 includes a main body portion 111 and an upper cover extension wall 112, the upper cover extension wall 111 is fixedly connected with the lower cover 12, and the main body portion 112 extends from the upper cover extension wall 111 to the sounding unit.
  • the body 2 is bent and extended, and the main body portion 112 is provided with a sound-emitting port 110 through which the diaphragm 221 leaks out.
  • the housing 1 and the positioning boss 20 are both metal materials, which provide conditions for metal welding between the housing 1 and the sounding unit 2, so that the sounding unit 2 can be welded.
  • the body 2 is fixed to the main body portion 111 by welding through the positioning boss 20 .
  • the main body portion 111 includes an upper cover plate 1111 provided with the sound-emitting port 110 and a support portion 1112 bent and extended from the inner side of the upper cover plate 1111 to the sound-emitting unit 2.
  • the positioning boss 20 is supported on the support portion 1112 to realize the positioning of the sounding unit 2 , and then the positioning boss 20 and the support portion 1112 are welded and fixed by a metal welding process.
  • the support portion 1112 includes a support wall 1112a and a flange 1112b.
  • the support wall 1112a is formed by bending and extending from the inner side of the upper cover plate 1111 to the lower cover 12 along the vibration direction.
  • the edge 1112b is formed by bending and extending the side of the support wall 1112a away from the upper cover plate 1111 to the sounding unit 2 perpendicular to the vibration direction.
  • the flange 1112b is spaced from the upper cover plate 1111 and is Abutting on the sounding unit 2, the positioning boss 20 is welded and fixed to the side of the flange 1112b close to the lower cover 12, and the positioning boss can be effectively increased by the setting of the flange 1112b
  • the contact area between the 20 and the support portion 1112 makes the welding area between the two larger and improves the reliability of fixing.
  • the lower cover 12 is located on the side of the sound generating unit 2 away from the diaphragm 221 and forms a seal with the upper cover extension wall 112.
  • the lower cover 12 can also be fixed on the
  • the upper cover extension wall 112 is sealed and fixed between the lower cover 12 and the upper cover extension wall 112 by gluing.
  • the lower cover 12 includes a lower cover plate 121 located on the side of the sound-generating unit 2 away from the diaphragm 221 and spaced from the sound-generating unit 2 , and a peripheral edge of the lower cover plate 121 .
  • the lower cover extension wall 122 is bent and extended toward the upper cover 11 , the lower cover extension wall 122 abuts the upper cover extension wall 112 and forms a welding seal with the upper cover extension wall 112 , and the upper cover extends 11.
  • the lower cover 12 and the sound-generating unit 2 together form a rear sound cavity 102, which has a simple structure.
  • the acoustic performance of the speaker box 100 is improved, especially the low-frequency acoustic performance.
  • the existence of the 102 structure, the upper cover 11 and the lower cover 12 form a vibration absorption effect, so that the speaker box 100 will not cause the electronic products such as mobile terminals to generate shell vibration after being used in electronic products such as mobile terminals, effectively increasing The customer's user experience effect.
  • the housing 1 and the sounding unit 2 are fixed by welding, which effectively increases the connection strength of the housing 1 and the sounding unit 2, and ensures the reliability of the two fixings. , and it is not necessary to encapsulate the sounding unit 2 on the casing 1 by ultrasonic welding, which releases the thickness design of the casing 1.
  • the casing 1 can be thinner It can effectively reduce the volume of the rear acoustic cavity 102 occupied by the shell 1, release the volume design of the rear acoustic cavity 102, make the volume of the rear acoustic cavity larger, and improve the low-frequency acoustic performance;
  • the sounding unit 2 is placed on the flange 1112b through the positioning boss 20, which limits the position of the sounding unit 2 in the vibration direction, which is more conducive to sound production
  • the positioning of the single unit 2 simplifies the assembly process of the sounding unit 2 and improves the assembly efficiency.
  • the sounding unit 2 is partially exposed to the receiving space 10 through the sounding port 110 .
  • the basin frame 21 is at least partially exposed to the outside.
  • the diaphragm 221 is located outside the accommodating space 10 , effectively releasing the height design of the speaker box 100 along the vibration direction, which is beneficial to the miniaturization design of the speaker box 100 .
  • the outer periphery of the sound-generating unit 2 is spaced from the support wall 1112a, and the sound-generating unit 2, the flange 1112b and the support wall 1112a together form a glue container 210.
  • the glue accommodating groove 210 is formed by the outer side of the basin frame 21 and the supporting wall 1112a spaced apart, and the glue accommodating groove passes between the outer peripheral side of the basin frame 21 and the supporting wall 1112a.
  • the seal is formed by gluing inside 210 , which further improves the fixing reliability and sealing between the sounding unit 2 and the upper cover 11 .
  • the speaker box further includes a conductive member 3 that connects the sound-generating unit 2 with an external electrical signal.
  • a conductive member 3 that connects the sound-generating unit 2 with an external electrical signal.
  • one end of the conductive member 3 extends to the receiving space
  • the inside of 10 is electrically connected with the sounding unit 2 , and the other end is connected with an external electrical signal outside the receiving space 10 .
  • the speaker box 100 further includes a ventilating spacer 4 located in the rear acoustic cavity 102 and covered on the side of the sound generating device 2 away from the diaphragm 221 .
  • the ventilating spacer 4 includes a spacer body 41 disposed opposite to the lower cover 12, a spacer extension 42 bent and extending from the periphery of the spacer body 41 to the upper cover 11, and a spacer extending portion 42 extending from the periphery of the spacer body 41 to the upper cover 11.
  • One end of the spacer extension portion 42 away from the spacer body 41 is bent and extended from the spacer fixing portion 43 .
  • the spacer fixing portion 43 is fixed to the positioning boss 20, and the spacer fixing portion 43 and the surrounding side of the sounding unit 2 are glued to form a seal.
  • the air-permeable spacer 4 and the shell The body 1 together forms a powder filling space 5 .
  • the powder filling space 5 is used for filling sound-absorbing materials.
  • the air-permeable spacer 4 effectively prevents the sound-absorbing particles from entering the sound-emitting unit 2. The risk of sound failure is avoided and reliability is improved.
  • the upper cover includes an upper cover extension wall that is fixedly connected with the lower cover, and a main body portion that is bent and extended from the upper cover extension wall to the sound-emitting unit.
  • the sound-emitting port of the membrane, the sound-generating unit is provided with a positioning boss; the shell and the positioning boss are all metal materials, and the sound-generating unit is welded and fixed to the main body through the positioning boss; the lower cover is located on the side of the sound-generating unit away from the diaphragm It forms a seal with the extension wall of the upper cover, and the upper cover, the lower cover and the sounding unit together form a rear sound cavity; in the above structure, the shell and the positioning boss are both metal materials, and the two are welded and fixed by metal welding.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

La présente invention fournit un caisson de haut-parleur, comprenant un boîtier ayant un espace de logement et une unité de production de son partiellement logée et fixée dans l'espace de logement. Le boîtier comprend un couvercle supérieur et un couvercle inférieur qui recouvre le couvercle supérieur et définit l'espace de logement avec le couvercle supérieur. L'unité de production de son comprend une membrane pour la vibration et la production de son. Le couvercle supérieur comprend une paroi d'extension de couvercle supérieur reliée de manière fixe au couvercle inférieur et une partie de corps principal courbée et étendue depuis la paroi d'extension de couvercle supérieur jusqu'à l'unité de production de sons ; la partie de corps principal est, de manière pénétrante, pourvue d'un orifice de production de son exposé à l'extérieur de la membrane ; l'unité de production de son est pourvue d'un bossage de positionnement ; le boîtier et le bossage de positionnement sont tous deux faits de matériaux métalliques, et l'unité de production de son est soudée et fixée à la partie de corps principal au moyen du bossage de positionnement. Le couvercle inférieur est situé sur le côté de l'unité de production sonore, loin de la membrane, et forme un joint avec la paroi d'extension du couvercle supérieur. Le couvercle supérieur, le couvercle inférieur et l'unité de production de son définissent conjointement une cavité sonore arrière. Par rapport à l'art apparenté, le caisson de haut-parleur de la présente invention présente les avantages suivants : le volume de la cavité sonore arrière est important, et la performance acoustique à basse fréquence est excellente.
PCT/CN2020/123573 2020-08-27 2020-10-26 Caisson de haut-parleur WO2022041438A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010879372.1A CN112104930B (zh) 2020-08-27 2020-08-27 扬声器箱
CN202010879372.1 2020-08-27

Publications (1)

Publication Number Publication Date
WO2022041438A1 true WO2022041438A1 (fr) 2022-03-03

Family

ID=73758015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/123573 WO2022041438A1 (fr) 2020-08-27 2020-10-26 Caisson de haut-parleur

Country Status (2)

Country Link
CN (1) CN112104930B (fr)
WO (1) WO2022041438A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024000683A1 (fr) * 2022-06-30 2024-01-04 瑞声科技(南宁)有限公司 Caisson de haut-parleur
WO2024007429A1 (fr) * 2022-07-04 2024-01-11 瑞声光电科技(常州)有限公司 Caisson de haut-parleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113993043B (zh) * 2021-10-22 2024-03-12 歌尔股份有限公司 发声装置和电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203446022U (zh) * 2013-07-24 2014-02-19 歌尔声学股份有限公司 扬声器模组
CN208353585U (zh) * 2018-01-04 2019-01-08 瑞声科技(新加坡)有限公司 扬声器箱
CN208638633U (zh) * 2018-08-03 2019-03-22 瑞声光电科技(常州)有限公司 扬声器
CN209390333U (zh) * 2018-12-28 2019-09-13 瑞声科技(新加坡)有限公司 一种发声装置
US20200059730A1 (en) * 2018-08-17 2020-02-20 AAC Technologies Pte. Ltd. Speaker
CN211321501U (zh) * 2020-01-09 2020-08-21 瑞声科技(新加坡)有限公司 扬声器箱

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200952505A (en) * 2008-06-13 2009-12-16 Foxconn Tech Co Ltd Sound box structure
CN202488676U (zh) * 2012-01-09 2012-10-10 瑞声光电科技(常州)有限公司 扬声器
CN204291365U (zh) * 2014-11-29 2015-04-22 歌尔声学股份有限公司 微型扬声器
CN205847588U (zh) * 2016-07-21 2016-12-28 瑞声科技(新加坡)有限公司 扬声器箱
CN206524965U (zh) * 2017-01-22 2017-09-26 瑞声科技(新加坡)有限公司 发声器件
CN107547957B (zh) * 2017-08-22 2019-10-22 瑞声科技(新加坡)有限公司 扬声器箱
CN108235194A (zh) * 2018-01-04 2018-06-29 瑞声科技(新加坡)有限公司 发声器件及其安装方法
CN209390306U (zh) * 2018-12-30 2019-09-13 瑞声科技(新加坡)有限公司 扬声器
CN109982222B (zh) * 2019-05-16 2024-02-06 国光电器股份有限公司 一种微型受话器
CN110267169B (zh) * 2019-06-11 2021-06-22 瑞声科技(新加坡)有限公司 一种扬声器
WO2021000194A1 (fr) * 2019-06-30 2021-01-07 瑞声声学科技(深圳)有限公司 Haut-parleur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203446022U (zh) * 2013-07-24 2014-02-19 歌尔声学股份有限公司 扬声器模组
CN208353585U (zh) * 2018-01-04 2019-01-08 瑞声科技(新加坡)有限公司 扬声器箱
CN208638633U (zh) * 2018-08-03 2019-03-22 瑞声光电科技(常州)有限公司 扬声器
US20200059730A1 (en) * 2018-08-17 2020-02-20 AAC Technologies Pte. Ltd. Speaker
CN209390333U (zh) * 2018-12-28 2019-09-13 瑞声科技(新加坡)有限公司 一种发声装置
CN211321501U (zh) * 2020-01-09 2020-08-21 瑞声科技(新加坡)有限公司 扬声器箱

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024000683A1 (fr) * 2022-06-30 2024-01-04 瑞声科技(南宁)有限公司 Caisson de haut-parleur
WO2024007429A1 (fr) * 2022-07-04 2024-01-11 瑞声光电科技(常州)有限公司 Caisson de haut-parleur

Also Published As

Publication number Publication date
CN112104930B (zh) 2022-05-03
CN112104930A (zh) 2020-12-18

Similar Documents

Publication Publication Date Title
WO2022041459A1 (fr) Caisson de haut-parleur
WO2021138952A1 (fr) Enceinte de haut-parleur
WO2021164080A1 (fr) Caisson de haut-parleur
WO2022041438A1 (fr) Caisson de haut-parleur
WO2021138954A1 (fr) Enceinte de haut-parleur
WO2022041440A1 (fr) Caisson de haut-parleur
CN112004169B (zh) 扬声器箱
WO2022041455A1 (fr) Caisson de haut-parleur
WO2022041434A1 (fr) Caisson de haut-parleur
WO2022041453A1 (fr) Caisson de haut-parleur
WO2022041442A1 (fr) Caisson de haut-parleur
CN211531241U (zh) 扬声器箱
CN112153503B (zh) 发声器件
WO2021000194A1 (fr) Haut-parleur
WO2022041469A1 (fr) Caisson de haut-parleur
CN112073853B (zh) 发声器件
CN112153502B (zh) 扬声器箱
WO2022041439A1 (fr) Caisson de haut-parleur
WO2022007025A1 (fr) Boîtier de haut-parleur
WO2022007023A1 (fr) Boîtier de haut-parleur
WO2022006791A1 (fr) Enceinte de haut-parleur
WO2022041430A1 (fr) Dispositif de production sonore
CN112104933B (zh) 发声器件
WO2022041458A1 (fr) Dispositif de production de son
CN112153504B (zh) 扬声器箱

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: 20951106

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: 20951106

Country of ref document: EP

Kind code of ref document: A1