Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Works, Ltd.

Panasonic Corporation

Panasonic Electric Works Co., Ltd.

Shinichi Taniguchi

Tomohiro Kunita

Hiroaki Shimizu

Suehisa Kishimoto

Atsushi Takahashi

Takahiro Nishinaka

Tadanobu Kitagawa

Hiroki Inoue

Wataru Sanematsu

Mahito Nunomura

Masayoshi Nagayama

Yumi Hanato

Yukihiro Masuda

Shimizu Hioraki

An oral cavity washing device includes a nozzle and a pump that supplies a liquid to the nozzle. The nozzle has a nozzle flow passage and a reduced part that is disposed in an intermediate part of the nozzle flow passage and that is smaller in cross-sectional area than a rest of the nozzle flow passage. A first flow passage and a second flow passage that are in parallel to each other are disposed between the nozzle and the pump. The first flow passage has a first valve that causes the first flow passage to be opened only when the pump sucks the liquid. The second flow passage has a second valve that causes the second flow passage to be opened only during discharge performed by the pump.

Oral cavity washing device

An oral cavity washing device includes a nozzle having a flow passage structure and a pump to feed washing liquid to the flow passage structure. The flow passage structure includes: a first component having a first flow passage; a second component being disposed downstream of the first component and having a second flow passage that is narrower than the first flow passage; a third component being disposed downstream of the second component and having a third flow passage that is broader than the second flow passage; a reducer being disposed downstream of the third component and being configured so as to reduce a width of the flow passage; and a fourth component being disposed downstream of the reducer and having a fourth flow passage that widens with an advancement in a path from the reducer to the outlet port so as to generate cavitation in the washing liquid.

Oral cavity washing device and nozzle for the same

An electric toothbrush according to the present disclosure includes: a shaft to which a brush is attached; a primary drive unit that operates the shaft to let the brush perform a cleaning motion; and a supplementary drive unit that enables the shaft to move eccentrically. Accordingly, the electric toothbrush can facilitate entry of bristles of the brush between teeth and improve performance of cleaning between the teeth.

Electric toothbrush

An electric-electronic toothbrush carries a brush driven to vibrate, and arranged to flow an electric current into a user's oral cavity for promoting removal of tooth plaque. The electric-electronic toothbrush has a shaft driven to vibrate along and/or about an axis of the shaft, and a battery supplying the electric current. The shaft is electrically conductive to flow the electric current into a brush electrode of a brush head. The shaft is electrically connected to the battery by way of an extendible electrically conductive coupler within the handle. The electrically conductive coupler has its one end secured to the shaft, and the other end to an electrically conductive member connected to one of poles of the battery, so as to absorb the vibration of the shaft. The handle is provided on its outer peripheral surface with a touch electrode. The electric-electronic toothbrush is arranged to give predetermined electric potentials respectively to the brush electrode and the touch electrode, so as to flow a microelectric current onto the tooth surface for removal of tooth plaque during user's tooth brushing due to vibration of a brush.

Electric-electronic toothbrush

A mouth cleaning device includes a head portion provided with bristles and an electrode; and a grip portion provided with an electrode. Further, the mouth cleaning device includes a boosting circuit for boosting an output voltage of a battery serving as a power source and applying the boosted voltage to the electrodes of the head portion and the grip portion; and a current limit circuit for limiting a current flowing from one electrode to the other via a human body.

Mouth cleaning device

An actuator includes a shaft supported in such a manner as to make axial reciprocating movement or rotational reciprocating movement around longitudinal axis thereof, and an electricity conducting member for making contact with the shaft at a plurality of points on a circumferential surface of the shaft used as an electricity conducting path leading to other members. Further, an electric toothbrush includes the actuator as a drive power source for a brush body, and the brush body is adapted to be supplied with an electric current through the shaft.

Actuator and electric toothbrush using the same

In a power toothbrush, a brush base portion is provided at a top end of a brush attachment which is detachably engaged with a main body containing an actuator generating driving force for driving at least the brush base portion. The brush base portion can be reciprocally moved in an axial direction of the main body with a predetermined stroke and a predetermined frequency, swing around a rotation axis perpendicular to the axial direction of the main body with a predetermined swing angle and a predetermined frequency, or rotated around the rotation axis with a predetermined rotation speed. A plurality of floating base member is floatingly supported in guiding hollows formed in the brush base portion, and a brush staple is planted on each floating base member. Thus, dirt or plaque remained in interdental portion of the tooth can effectively be removed, when top ends of the brush staples contact the surfaces of the tooth.

Growing community of inventors

Hikone, Japan

Shinichi Taniguchi