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(11)

EP 4 554 416 A1

(12)

(43) Date of publication: 21.05.2025 Bulletin 2025/21 (21) Application number: 23733834.8 (22) Date of filing: 17.05.2023

(51) International Patent Classification (IPC):  A24F 40/46(2020.01) A24F 40/20(2020.01) (52) Cooperative Patent Classification (CPC): A24F 40/46; A24F 40/20; H05B 3/04; H05B 2203/022; H05B 2203/013; H05B 3/42 (86) International application number: PCT/CN2023/094706 (87) International publication number: WO 2024/012044 (18.01.2024 Gazette 2024/03)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 12.07.2022 CN 202221790483 U (71) Applicant: Shenzhen Huabao Collaborative Innovation Technology Research Institute Co., Ltd. Shenzhen, Guangdong 518100 (CN)	(72) Inventors: LI, Siwen Shenzhen, Guangdong 518100 (CN) FU, Xiaosong Shenzhen, Guangdong 518100 (CN) TANG, Zhiqiang Shenzhen, Guangdong 518100 (CN) WEI, Yong Shenzhen, Guangdong 518100 (CN) (74) Representative: Herrero & Asociados, S.L.  Edificio Aqua - Agustín de Foxá, 4-10 28036 Madrid 28036 Madrid (ES)