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Brush heads with wedge and spring handle interface for electric toothbrushes

An electric toothbrush and brush head technology, which can be used in household appliances, dentistry, brushes, etc., can solve problems such as the reduction in the range of movement of the brush, poor clinical efficacy, and reduced torque transmission efficiency.

Inactive Publication Date: 2016-09-21
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if part of the mechanical interface is a spring, the spring rate must be at a certain level; if the spring rate is low, the efficiency of torque transfer will be significantly reduced, resulting in reduced amplitude of brush movement and poor clinical efficacy

Method used

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  • Brush heads with wedge and spring handle interface for electric toothbrushes
  • Brush heads with wedge and spring handle interface for electric toothbrushes
  • Brush heads with wedge and spring handle interface for electric toothbrushes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] figure 1 An electric toothbrush is shown generally at 10 . It includes a handle portion 12 having a drive shaft 14 extending from the top of the handle. The drive shaft 14 is part of a drive assembly 16 in the handle that is powered by a battery 18, which is typically rechargeable. An on / off switch 20 controls the operation of the toothbrush. The drive assembly 16 can take various forms. In one embodiment, the drive assembly is an electromagnetic motor vibrating the drive shaft at a frequency in the range of 200-300 Hz, preferably about 260 Hz, through a selected angle, eg in the range of 5-20°, preferably about 11°. These specifications generally provide effective cleaning. However, it should be understood that other drive means may be used.

[0012] Toothbrush 10 also includes a head assembly 24 . The brush head assembly 24 includes a conventional brush member 26 for contacting and cleaning teeth, and an elongated neck 28 . The bristle member 26 is mounted at t...

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PUM

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Abstract

The brushhead (24) is part of a power toothbrush (10) which includes a handle portion (12) with a drive shaft (14) having a wedge-shaped free end (40) and a circumferential recess (36) in the external surface (35) adapted to receive a portion of a helical spring member (32). The brushhead includes a hollow neck portion (28) to receive the drive shaft. The hollow part of the neck portion includes a circumferential recess (38) in its interior surface (37) which is in registry with the recess on the drive shaft when the brushhead is operatively positioned on the handle, wherein the hollow portion includes a wedge-shaped recess (44) at the distal end thereof which receives in a mating relationship the wedge-shaped end of the drive shaft.

Description

technical field [0001] This invention relates generally to brush heads for electric toothbrushes, and more particularly to the mechanical interface between the brush head and the handle portion of the toothbrush. Background technique [0002] The interface configuration between the movable (ie, vibrating) brush head and the handle of the electric toothbrush is necessary for proper operation of the toothbrush. The interface must provide the required axial retention to hold the brush head in place during use, yet allow the brush head to be easily withdrawn by the user to enable either the handle to be cleaned or the handle to be cleaned at the end of its life. Replace it when using another brush head such as a family member. Furthermore, the interface must provide efficient torque transmission between the toothbrush drive shaft extending from the handle and the brush head. Any lost motion between the motion of the drive shaft and the corresponding motion of the brush head ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C17/22
CPCA61C17/222A46B5/0095A46B7/042A46B13/023
Inventor T·G·克罗斯特
Owner KONINK PHILIPS ELECTRONICS NV
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