Electric toothbrush
First Claim
1. An electric toothbrush comprising:
- a motor;
a brush body pivoted so as to freely rotate about a rotating shaft which forms a predetermined angle with a driving shaft of the motor;
a lever member which is provided between the motor and the brush body and is pivoted so as to swing about a predetermined swinging shaft;
a first motion converting mechanism which is provided between the driving shaft of the motor and a first end portion of the lever member positioned at the side of the motor and converts rotating motion of the driving shaft of the motor into swinging motion of the lever member; and
a second motion converting mechanism which is provided between the brush body and a second end portion of the lever member positioned at the side of the brush body and converts swinging motion of the lever member into reciprocal rotating motion of the brush body.
2 Assignments
0 Petitions
Accused Products
Abstract
In an electric toothbrush in which a disk-like brush body is reciprocally rotated about an axis intersecting at a predetermined angle in a line extended in a longitudinal direction of a grip portion, a head portion put into user'"'"'s mouth is made smaller or thinner, a rotation shaft of the brush body and a head portion are enabled incline at an optional angle with respect to the grip portion, and transmission efficiency of driving force is increased. For there purposes, an eccentric member having an eccentric shaft is fixed on a driving shaft of a motor, a joint portion formed at a first end portion of a lever member is made point contact with the eccentric shaft, so that the rotation movement of the eccentric shaft is converted to swing movement of the first end portion of the lever member. In addition, a groove formed at a second-end portion of the lever member and a pin provided on the brush body are engaged with each other, so that swing motion of the second end portion of the lever member is converted to reciprocal rotation motion of the brush body.
29 Citations
14 Claims
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1. An electric toothbrush comprising:
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a motor;
a brush body pivoted so as to freely rotate about a rotating shaft which forms a predetermined angle with a driving shaft of the motor;
a lever member which is provided between the motor and the brush body and is pivoted so as to swing about a predetermined swinging shaft;
a first motion converting mechanism which is provided between the driving shaft of the motor and a first end portion of the lever member positioned at the side of the motor and converts rotating motion of the driving shaft of the motor into swinging motion of the lever member; and
a second motion converting mechanism which is provided between the brush body and a second end portion of the lever member positioned at the side of the brush body and converts swinging motion of the lever member into reciprocal rotating motion of the brush body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electric toothbrush comprising:
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a motor;
a brush body pivoted so as to freely rotate about a rotating shaft which forms a predetermined angle with a driving shaft of the motor;
a plurality of lever members which is provided between the motor and the brush body, each pivoted so as to swing about a predetermined swinging shaft and coupled with each other so as to freely swing in the reverse direction to each other;
a first motion converting mechanism which is provided between the driving shaft of the motor and a first end portion of the lever member closest to the motor among the lever members and converts rotating motion of the driving shaft of the motor into swinging motion of the lever member; and
a second motion converting mechanism which is provided between the brush body and a second end portion of the lever member closest to the brush body among the lever members and converts swinging motion of the lever member into reciprocal rotating motion of the brush body. - View Dependent Claims (14)
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Specification