US 6,785,926 B2Granted

Mechanically-driven toothbrush with improved brushing action

OwnerCarl Greeninventor

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Abstract

A mechanically-driven toothbrush consists of a handle, which contains a driving motor with a conversion mechanism, and a toothbrush attachment removably connectable to the output shaft of the conversion mechanism. The handle with the conversion mechanism and the drive motor may comprise a standard, commercially produced unit with the output end of the conversion mechanism performing alternating rotary movements. The toothbrush attachment is made in the form of a conventional toothbrush head without any angular transmission. The tail of the head is connected with the output end of the conversion mechanism by a coupling, which has a locking element for engagement with an appropriate connection element on the output end of the conversion mechanism. The connection portion is covered by a protective sleeve that can be removably connected to the front end of the handle. In operation, the user moves the toothbrush up and down in the vertical directions of the teeth. Efficient removal of the plaque from the spaces between the teeth is achieved due to the fact that motions of the bristles imitate motions of a toothpick when the latter is used for poking the plaque from the intertooth spaces.

Claims3

Dependent claims

A mechanically-driven toothbrush with improved brushing action, comprising:

a handle which has a longitudinal axis and contains a drive motor with a conversion mechanism for converting rotation of said drive motor into reciprocating rotary motions, said conversion mechanism having an output shaft that is oriented in the direction parallel to said longitudinal axis and projects from said handle and performs said reciprocating rotary motions, and a toothbrush head with bristles;
and
means for connecting said output shaft to said toothbrush head for transmitting said reciprocating rotary motions to said toothbrush head with rotation around an axis parallel to said longitudinal axis;
said drive motor being an electric motor;
said toothbrush head being connected to said output shaft via a disconnectable attachment, wherein said output shaft has a first connection member, said disconnectable attachment comprising a coupling with a first locking member and with a second locking member, said toothbrush head having a second connection member, said first locking member being connectable to said first connection member of said output shaft, and said second locking member being connectable to said second connection member of said toothbrush head;
said coupling comprising a sleeve having an outer surface and an inner surface, said first locking member and said second locking member comprising snapping projections on said inner surface, and wherein said first connection member and said second connection member comprising recesses engageable with said snapping projections.

3 more elements

Dependencies are inferred from the claim text.