US 12,303,019 B2
Replacement brush head and oral hygiene device
Xiaoli Ruan, Shenzhen (CN)
Assigned to Shenzhen Ya Bei Kang Technology Co., Ltd, Shenzhen (CN)
Filed by Shenzhen Ya Bei Kang Technology Co., Ltd, Shenzhen (CN)
Filed on Aug. 24, 2022, as Appl. No. 17/894,649.
Claims priority of application No. 202210280571.X (CN), filed on Mar. 22, 2022.
Prior Publication US 2023/0301423 A1, Sep. 28, 2023
Int. Cl. A46B 5/00 (2006.01); A61C 17/22 (2006.01)
CPC A46B 5/0095 (2013.01) [A61C 17/222 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A replacement brush head, comprising:
a bristle head (5),
a housing (6),
a transmission shaft (3), and
a tail cover (1), wherein the transmission shaft (3) is arranged inside the housing (6), the bristle head (5) is arranged in a transmission manner at a top end of the housing (6) through the transmission shaft (3), and the tail cover (1) is arranged at a tail end of the housing (6);
wherein the transmission shaft (3) comprises a transmission rod (30), and the transmission rod (30) is provided with a guide groove (31); a guide rib (61) is arranged on an inner side of the housing (6); the guide rib (61) is configured to engage with the guide groove (31);
wherein a damping spring (4) is sheathed on the transmission rod (30);
wherein a spring limiting rib (62) is arranged on the inner side of the housing (6), the spring limiting rib (62) is configured to engage with the damping spring (4).