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Drive system for electric toothbrushes and the like

A drive system, drive shaft technology, applied in dentistry, teeth cleaning, vibration massage, etc.

Inactive Publication Date: 2007-02-14
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a need to provide a drive system that can operate efficiently with a small motor, thereby making the processing tool inexpensive and of small size without compromising its efficiency

Method used

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  • Drive system for electric toothbrushes and the like
  • Drive system for electric toothbrushes and the like
  • Drive system for electric toothbrushes and the like

Examples

Experimental program
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Embodiment Construction

[0025] The present invention relates to a drive system for imparting motion to a treatment tool in which a treatment element(s) is movably mounted on the tool head. The invention may be practiced when the entire head is active, or when only a portion of the head is active and the active portion includes at least some of the treatment elements of the treatment tool. Representative examples of such grooming implements include electric toothbrushes, electric shavers, scissors, massage devices, and other personal grooming implements. It should be understood that this list of examples is not intended to limit the scope or practice of the invention.

[0026] A preferred embodiment of the invention is a drive system for an electric toothbrush. This embodiment of the invention is illustrated in the drawings.

[0027] Such as Figure 1-2 As shown, electric toothbrush 10 includes a hollow handle 12 and a head 14 connected to the handle by a hollow neck 16 . In the illustrated form o...

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PUM

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Abstract

A drive system for imparting motion to a treatment tool such as a toothbrush or similar device includes a cam driven by a motor to rotate about an axis of rotation. The cam has a closed loop cam track offset from the axis of rotation. A control member is disposed between the cam and the processing tool head. The control member has a control slot extending completely through the control member. A pivot member is located between the control member and the processing tool head. The drive system also includes a drive shaft, the drive end of which is freely mounted within the cam track. A drive shaft extends through the control slot and pivot member, the driven end of which is operably connected to the drive connection of the tool head. Therefore, when the cam member rotates, the movement direction of the drive shaft is controlled by restricting the drive shaft from sliding in the control groove. Because the drive shaft fits freely within the cam track, it is still able to rotate. The torque and angle of oscillation imparted to the movable treatment element is determined by the position of the pivot member relative to the treatment head.

Description

Background of the invention [0001] Various treatment tools exist that include movable treatment elements on the head of the tool. For example, electric toothbrushes typically have a head attached to a handle, with at least a portion of the head rotating continuously in one direction, or oscillating back and forth. Other treatment tools that may have active treatment elements include, for example, electric shavers, scissors, massage devices, and various other personal grooming devices. [0002] An example of an electric toothbrush with an oscillating disc on its cleaning head is described in WO 03 / 02453. The toothbrush includes a drive rocker coupled to a motor through a cam. One end of the drive rocker is fixedly mounted to the cam at a position offset from the motor shaft. So when the motor shaft turns the cam, the drive rocker moves in a funnel-like or cone-like fashion. The drive rocker is mounted between the motor and a bristle carrier extending through the annular bea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C17/34B26B19/28A61H23/02
CPCB26B19/28A61C17/349A61C17/3436A61C17/16A61C17/34
Inventor J·法托里
Owner COLGATE PALMOLIVE CO