Electric toothbrush rotating replacement head device

An electric toothbrush rotating replacement head device, comprising:

• a toothbrush head, comprising:
• a first lug boss and a pin;
• wherein the first lug boss defines a pin installation hole, and a side of the first lug boss is provided with a driven gear;
• a toothbrush handle, connected to the toothbrush head and defining a top cavity;
• wherein the toothbrush handle comprises:
• a second lug boss disposed in the top cavity, and the second lug boss defines a pin through hole;
• and
• a rotating shaft, disposed in the toothbrush handle;
• wherein a top of the rotating shaft is provided with a driving gear meshed with the driven gear, thereby enabling the rotating shaft to drive the toothbrush head;
• wherein the first lug boss is disposed in the top cavity and abuts against the second lug boss;
• and the pin penetrates the pin through hole of the second lug boss into the pin installation hole of the first lug boss, and the pin is in an interference fit with the pin installation hole;
• wherein the driven gear is directly connected with the first lug boss, a bristle limiting bone is directly connected with the first lug boss and extends from the first lug boss along a direction facing away from the driven gear;
• and two limiting bones are directly connected with an inner wall of the toothbrush hand surrounding the top cavity and spaced out the second lug boss, the two limiting bones protrude inward relative to the inner wall of the toothbrush hand, and the bristle limiting bone is disposed between the two limiting bones;
• and
• wherein the electric toothbrush rotating replacement head device further comprises:
• a bristle top cover and a bristle bottom cover;
• the bristle top cover defines bristle holes installed with bristles therein, and hot-melt adhesive nails are disposed between the bristles and configured to be melted to fix the bristles on the bristle top cover;
• and the bristle bottom cover defines a glue-overflow groove, ultrasonic lines surround the glue-overflow groove and are spaced apart from each other, and the ultrasonic lines are configured to be fused to fix the bristle bottom cover on the bristle top cover;
• wherein an outer surface of the rotating shaft is provided with a first limiting bone and a second limiting bone;
• wherein the electric toothbrush rotating replacement head device further comprises:
• a tail plug disposed at a bottom of the toothbrush handle;
• the tail plug comprises:
• a first limiting block and a second limiting block, and the first limiting block is snapped with the first limiting bone, and the second limiting block is snapped with the second limiting bone;
• wherein the top of the rotating shaft is further provided with a rotating pivot, and the rotating pivot is disposed below the driving gear;
• and
• wherein an elastic sheet is directly connected with the rotating shaft, and the elastic sheet extends from an end of the rotating shaft to which it is directly connected along a direction facing away from the rotating pivot, and an end of the elastic sheet facing away from the rotating pivot is provided with an elastic protrusion configured to be snapped with a main shaft clamping groove of a main shaft;
• the first limiting bone and the second limiting bone protrude outward relative to the rotating shaft;
• and the first limiting bone, the elastic sheet, and the rotating pivot are located at a same side of the rotating shaft.