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2-speed toothbrush

An electric toothbrush, speed technology, applied in the direction of brushes, brush bodies, dentistry, etc., can solve the problems of inconsistent expected speed of brush vibration or rotation, slow motor, increased voltage drop of resistors, etc.

Inactive Publication Date: 2009-12-23
CHURCH & DWIGHT CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So as the motor gets heavier it draws more current and accordingly the voltage drop across this resistor will increase and the motor will be slower
[0009] Also, over the life of the battery, the voltage will fluctuate as the battery ages, so the desired speed of the brush's vibratory or rotational action will not be consistent throughout the life of the battery

Method used

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  • 2-speed toothbrush
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Embodiment Construction

[0014] The invention will be described with respect to the use of a two-speed battery operated motor in an electric toothbrush. Furthermore, it should be understood that other devices powered by battery operated motors may also provide the unique circuitry of the present invention.

[0015] according to figure 1 An electric toothbrush 10 includes a housing 12 having a handle portion 14 , a neck 16 and a head portion 18 . Head portion 18 contains bristles 20 , which are typically supported by a brush plate 22 . A variable high speed motor 24 is provided for effecting vibration or rotation of the brush plate 22 or bristles 20 . In general, some type of linkage 24 between the motor and the brush plate 22 or bristles 20 converts rotation of the motor 24 into motion of the brush plate 22 and / or bristles 20 . Limitations on the type of movement of the bristles 20, or on the type of linkages and linkages used to move the bristles 20 by rotation of the motor 24 are not within the ...

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PUM

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Abstract

A circuit for varying the speed of a variable speed motor having a power source to provide a voltage to the motor and a diode as a means to provide a voltage drop within the circuit that is substantially independent of the amount of current to the motor. The invention may further comprise an electric toothbrush using the circuit.

Description

[0001] References to related applications [0002] This application is related to and enjoys the benefit of priority from US Provisional Application Serial No. 60 / 872,972, filed December 5, 2006. technical field [0003] The present invention relates to a novel circuit for varying the speed of a battery operated motor. The variable speed motor is used in household appliances such as electric toothbrushes. Background technique [0004] Traditional devices for cleaning the oral cavity have extended from traditional manual toothbrushes to powered devices. For example, electric toothbrushes such as those with axial and lateral vibrations or rotating bristles have been used to stimulate the up and down, back and forward oscillations of a manual toothbrush. These devices are typically powered by rechargeable, but somewhat shorter-lasting battery packs and / or tethered cables. [0005] Despite the many technical advantages over electric tooth cleaning devices, the old-fashioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46B13/02H02P3/00
CPCA61C17/221A61C17/34
Inventor 大卫·J·博尔霍克·伏格勒·布拉德
Owner CHURCH & DWIGHT CO INC