Power-driven toothbrush
First Claim
1. A power-driven toothbrush comprising a brush head mounted on a brush handle for vibratory movement relative thereto, a vibration transmission arm extending between said handle and said head, the arm having a longitudinal extent and having a predetermined frequency of resonance in a vibrational mode orthogonal to its longitudinal extent, and a vibration actuator located within the handle, said vibration transmitting arm including a magnet located within said handle and the actuator including a solenoid adjacent said magnet and means for supplying AC current to the solenoid at a frequency which is the same as the frequency of resonance of the vibration transmitting arm.
1 Assignment
0 Petitions
Accused Products
Abstract
A power-driven toothbrush comprising a brush head 1 mounted on a brush handle 2 for vibratory movement relative thereto, a vibration transmitting arm 33 extending between said handle 2 and said head 1 and a vibration actuator 3 located within the handle 2, said vibration transmitting arm 33 including a magnet 34 located within said handle 2 and the actuator 2 including a solenoid 32 adjacent said magnet 34 and means for supplying AC current to the solenoid 32 a frequency which is the same as the resonant frequency of the vibration transmitting arm 33. The means for supplying AC current to said solenoid includes a printed circuit board 31. The frequency of the AC current delivered to the solenoid and the natural frequency of the vibration transmitting arm are in the range of 100-300 Hz.
29 Citations
5 Claims
- 1. A power-driven toothbrush comprising a brush head mounted on a brush handle for vibratory movement relative thereto, a vibration transmission arm extending between said handle and said head, the arm having a longitudinal extent and having a predetermined frequency of resonance in a vibrational mode orthogonal to its longitudinal extent, and a vibration actuator located within the handle, said vibration transmitting arm including a magnet located within said handle and the actuator including a solenoid adjacent said magnet and means for supplying AC current to the solenoid at a frequency which is the same as the frequency of resonance of the vibration transmitting arm.
Specification