Patent ID: 11896116
Assignee: SHENZHEN BLUE DREAM DIGITAL TECHNOLOGY CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. An electric toothbrush rotating replacement head device, wherein the device comprises a toothbrush head, a toothbrush handle, an elastic connecting rod, a compression spring, and a spring sleeve; the toothbrush handle defines a cavity, and the toothbrush head is disposed on a top of the cavity; the spring sleeve, the compression spring, and the elastic connecting rod are sequentially arranged in the toothbrush handle from outside to inside;
wherein the toothbrush head comprises:
a bristle top cover;
a bristle bottom cover, disposed on the bristle top cover;
a positioning step, disposed on the bristle bottom cover, and the bristle top cover and the positioning step being located at two sides of the bristle bottom cover;
a convex block, disposed on the positioning step;
a first connecting bone, connected to the convex block;
a second connecting bone, connected to the convex block; wherein a first spacing cavity is provided between the first connecting bone and the second connecting bone; and
an inner cylinder, disposed in the convex block;
wherein the toothbrush handle defines an opening at a bottom of the cavity and a buckle hole, the buckle hole is configured to be fitted with a buckle of the spring sleeve, and the toothbrush handle comprises:
a rotation limiting column, disposed at the top of the cavity and disposed in the first spacing cavity;
wherein the rotation limiting column is configured to cooperate with the first connecting bone and the second connecting bone to limit a rotation angle of the toothbrush head; and
a cylinder, disposed at a side of the rotation limiting column and configured to match with the inner cylinder through a rotating shaft;
wherein the elastic connecting rod defines a first pin hole disposed at a top of elastic connecting rod, a pin is disposed in the first pin hole, and the compression spring is configured to drive the toothbrush head through the elastic connecting rod and the pin.