SUSPENDED MOTOR MOUNTING SYSTEM IN A POWER TOOTHBRUSH

摘要

A system configured to mitigate axial shocks and rotational vibration in a resonating power toothbrush (10). The system includes a motor mount (70), frame (40), and multi-function coil bobbin (90) that act in concert to absorb axial shocks originating from the motor shaft (60). The mount (70), frame (40), and coil bobbin (90) also act in concert to damp vibrations originating from the motor (50) to the housing (20).

主权项

1. A system for mitigating mechanical shock in a power toothbrush comprising:
an elongated housing open at a distal end and a proximal end; a frame slideably disposed within the housing, the frame having a distal end and a proximal end; a motor disposed within the frame, the motor including a floating shaft, the floating shaft having a distal end extending through the frame and housing and a proximal end extending within and toward the frame proximal end; a resilient motor mount disposed within the frame adjacent the motor, the motor mount including a compression surface for holding the motor in the frame and a bottom bumper spaced away from the proximal end of the shaft; a multi-function charging coil bobbin comprising a bridge spring having two ends, the bridge spring disposed across and in a spaced away disposition from a proximal end of the bobbin, the multi-function charging coil bobbin disposed in resilient contact with the proximal end of the frame at the housing proximal end, wherein the charging coil bobbin is further engaged with an inside wall of the housing proximal end in an arrangement which compressibly biases the frame against the housing distal end, the bridge spring further disposed in resilient contact with the proximal end of frame).