Electric toothbrush
First Claim
Patent Images
1. Electric toothbrush comprising:
- a tooth brush casing;
a brush rod mounted in the toothbrush casing so as to be rotatably and longitudinally movable;
a lever fixed to said brush rod, wherein said lever has a socket portion which is provided with a socket having a center axis perpendicular to the longitudinal axis of the brush rod;
an eccentric cam which communicates with said socket, wherein said eccentric cam has a rotational axis which is perpendicular to the longitudinal axis of the brush rod; and
means for rotating said eccentric cam to cause an oscillatory movement of the lever and the brush rod about the longitudinal axis of the brush rod and a longitudinal movement of the lever and the brush rod along the longitudinal axis of the brush rod.
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Abstract
An electric toothbrush has a gear driven by a motor. On the face of the gear is an eccentric pin upon which a sliding member is located. The eccentric pin engages with a socket in a lever which is securely connected to a brush rod. The lever is moved up and down and simultaneously oscillates due to the rotational movement of the eccentric pin so that the brush rod executes a corresponding movement.
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Citations
19 Claims
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1. Electric toothbrush comprising:
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a tooth brush casing; a brush rod mounted in the toothbrush casing so as to be rotatably and longitudinally movable; a lever fixed to said brush rod, wherein said lever has a socket portion which is provided with a socket having a center axis perpendicular to the longitudinal axis of the brush rod; an eccentric cam which communicates with said socket, wherein said eccentric cam has a rotational axis which is perpendicular to the longitudinal axis of the brush rod; and means for rotating said eccentric cam to cause an oscillatory movement of the lever and the brush rod about the longitudinal axis of the brush rod and a longitudinal movement of the lever and the brush rod along the longitudinal axis of the brush rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification