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(11)

EP 3 934 498 A1

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(43) Date of publication: 12.01.2022 Bulletin 2022/02 (21) Application number: 20769429.0 (22) Date of filing: 06.03.2020

(51) International Patent Classification (IPC):  A47K 13/00(2006.01) A47K 13/24(2006.01) A47K 13/14(2006.01) B44C 1/24(2006.01) (52) Cooperative Patent Classification (CPC): B44C 1/228; F21V 23/0471; A47K 13/24; A47K 13/00; F21V 33/004; B44F 1/00; G02B 6/006; G02B 6/0095; G02B 6/0041; G02B 6/0021; F21Y 2115/10 (86) International application number: PCT/CN2020/078253 (87) International publication number: WO 2020/182080 (17.09.2020 Gazette 2020/38)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 08.03.2019 WO PCT/CN2019/077559 29.07.2019 WO PCT/CN2019/098243 (71) Applicant: Guizhou Topseat Technology Company Limited Anshun, Guizhou 561100 (CN)	(72) Inventor: WU, Chengdong Anshun, Guizhou 561100 (CN) (74) Representative: Bardehle Pagenberg Partnerschaft mbB Patentanwälte Rechtsanwälte  Prinzregentenplatz 7 81675 München 81675 München (DE)