Modular Cordless Dental Handpiece Segmentation

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Solution Overview

Problem

Dental hygiene instruments face downtime and high costs due to sterilization needs, bulkiness, and wear from protective sleeves, as well as safety concerns from electrical components exposed to bodily fluids.

Innovation Solution

A modular cordless dental handpiece system with detachable modules, including a battery compartment, that allows for easy sterilization and reduced bulk, protecting electrical components from bodily fluids and enabling continuous use by allowing interchangeable modules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a protective sleeve is attached to the handpiece, then the handpiece is protected from bodily fluids, but the handpiece becomes bulkier and experiences wear from engagement and disengagement

Engineering Contradiction:
Improveprotection from bodily fluidsVSAvoidbulk
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The handpiece is divided into modular components including a reusable motor module and disposable tip assemblies. This segmentation allows the critical fluid-exposed portions to be easily replaced without affecting the main motor module, eliminating the need for protective sleeves that add bulk.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent employs disposable tip assemblies that are discarded after a single use or limited number of uses. This eliminates the need for protective sleeves on permanent components, as the disposable portions are replaced rather than protected, reducing overall bulk while maintaining reliability.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Productivity

If additional dental hygiene instruments are purchased to eliminate downtime, then continuous operation is achieved, but costs increase

Engineering Contradiction:
Improvecontinuous operationVSAvoidnumber of instruments
Core Design Contradiction:
ProductivityVSQuantity of substance

Solution Approach 1:

The modular design allows the motor module to be separated from the tip assemblies. While tip assemblies are sterilized or replaced, the expensive motor module remains in use, enabling continuous operation without requiring multiple complete handpiece sets.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The motor module is designed to be compatible with multiple tip assembly types through standardized coupling mechanisms. This universality allows a single motor module to serve multiple functions with different tips, reducing the total number of instruments needed while maintaining continuous productivity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Ease of operation

If a battery is included in the dental hygiene instrument for cordless operation, then mobility is improved, but weight and cost increase

Engineering Contradiction:
ImprovemobilityVSAvoidweight
Core Design Contradiction:
Ease of operationVSWeight of moving object

Solution Approach 1:

The battery power source is extracted from the main motor module and placed in a separate, removable module. This allows the battery to be added only when cordless operation is needed, reducing the weight of the core handpiece while maintaining mobility options.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The system allows dynamic configuration where the battery module can be attached or removed based on operational needs. This makes the weight adjustment dynamic rather than fixed, enabling the handpiece to be lightweight when wired operation is sufficient and mobile when battery power is required.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP2482758B1Cordless dental handpiece
Publication Date: 2017.05.03 DENTSPLY SIRONA INC
  • EP2482758B1 patent drawingFigure 1~3
  • EP2482758B1 patent drawingFigure 4~7
  • EP2482758B1 patent drawingFigure 8

AI summary

A cordless dental handpiece, a system including a cordless dental handpiece, and a method of connecting a cordless dental handpiece are disclosed. The cordless dental handpiece includes a first module and a second module. The second module is configured to detachably engage the first module. The second module includes a battery compartment.