| 摘要 |
Disclosed herein is a toothbrush apparatus including a tooth brush frame having a handle and a head frame, a head assembly and a retainer. The head frame has an interior opening with a gear rack. The head assembly includes a base having a plurality of openings and a bristle structure within each of the openings. The base is sized and shaped to slide within the head frame and the longitudinal edges of the base define rails. The head assembly includes a plurality of gears for compatible engagement with the gear rack. The bristle structures include static and dynamic bristles. The static bristles remain stationary, while the dynamic bristles are connected to the gears and rotate with the gears. The retainer has an interior guide for accepting the rails for sliding connection. The head assembly including the retainer are force fit within the head frame with the gears engaging the gear rack.
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