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A brushhead/handle interface for a power toothbrush

An electric toothbrush and interface technology, applied in the interface field, to achieve the effect of reliable torque transmission and axial retention function

Active Publication Date: 2010-12-01
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Axial retention can be a challenging aspect of this arrangement if the brush head needs to be removed frequently for cleaning or other purposes

Method used

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  • A brushhead/handle interface for a power toothbrush
  • A brushhead/handle interface for a power toothbrush
  • A brushhead/handle interface for a power toothbrush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] figure 1 A toothbrush 10 is shown including a handle portion 12 having a drive assembly including an extending drive shaft 14 driven by an electric motor (not shown) positioned within the handle 12 . The electric motor moves the drive shaft in an oscillating manner through a selected angle. The motor is controlled by an on-off switch 16 operated by the user. The brush head assembly 20 is removably mounted on the drive shaft 14 .

[0020] refer to figure 2 , the brushhead assembly 20 includes a coupling assembly 22 that fits snugly in and is captured by an arm portion 24 of the brushhead assembly. A conventional brush member 26 for cleaning teeth is positioned at the distal end of the arm portion. In operation, the brush member 26 rotates / oscillates back and forth through a selected angle to accomplish the desired cleaning. The coupling assembly may also include a ring 28 at the proximal end 30 of the coupling assembly. The rings can be of different colors to iden...

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PUM

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Abstract

The brushhead / handle interface includes a brushhead assembly (20) which has a brush member (26) for cleaning teeth. A driveshaft (14) extends from a handle portion (12) of the toothbrush (10), which is driven in an oscillating manner through a selected rotational angle. The driveshaft includes one or more contact regions (49). The coupling member includes an interface portion or portions (46) which are forced against the contact regions of the driveshaft by a single spring member when the driveshaft is inserted into the coupling member. The single spring (34) exerts a sufficient force on the interface portions of the coupling member against the contact regions of the driveshaft to produce both a reliable torque transfer between the driveshaft and the brushhead assembly and to maintain axial retention of the brushhead assembly on the driveshaft during operation of the toothbrush.

Description

technical field [0001] The present invention relates generally to handle / book head interface arrangements for electric toothbrushes, and more particularly to such an interface in which the torque transfer function of the brush head relative to the drive shaft of the toothbrush is accomplished by a single spring and coupling combination and Axial hold function. Background technique [0002] Many electric toothbrushes have an arrangement in which a drive shaft driven rotationally or through a selected vibration angle extends from the handle portion of the toothbrush and the drive mechanism is housed in the handle portion. The removable brush head assembly fits on the extended drive shaft. The brushhead assembly includes a coupling member that fits in the arm portion of the brushhead assembly. The distal end of the arm portion is a brush member for cleaning the teeth. A drive shaft extends into and securely engages the coupling member. [0003] The structural interaction be...

Claims

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Application Information

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IPC IPC(8): A61C17/22
CPCA61C2201/002A61C17/34A61C17/222
Inventor K·A·萨尔P·A·海德斯托姆T·G·克洛斯特
Owner KONINKLJIJKE PHILIPS NV
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