Replaceable Toothbrush Handle Structure for Durability and Grip
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Solution Overview
Problem
Existing oral hygiene devices lack durability, ergonomic design, and ecological considerations in their production and materials.
Innovation Solution
The oral hygiene device features a handle unit with a higher hardness and density than the application unit, made from materials like metal, plastic, wood, or ceramic, allowing for a durable and ergonomic design with a center of gravity in the handle region, facilitating comfortable use and enabling replaceable application units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle unit is made from a harder and denser material than the application unit, then durability and robustness are improved, but manufacturing complexity increases due to joining different materials
Solution Approach 1:
The device is divided into two main segments: a handle unit made from harder, denser material (metal, ceramic, or hard plastic) and an application unit made from softer, more compliant material (flexible plastic or elastomer). This segmentation allows each part to be optimized for its specific function while being manufactured separately and joined through the coupling unit.
Solution Approach 2:
The invention employs composite material construction by combining different materials with distinct properties in the handle unit and application unit. The handle unit uses harder materials for durability, while the application unit uses softer materials for flexibility and comfort, creating a composite structure that leverages the advantages of each material type.
2Strength
If the base body of the handle unit has greater hardness and density than the application unit, then robustness is improved, but ease of manufacture decreases due to material selection constraints
Solution Approach 1:
Different regions of the device have different material properties optimized for their local functions. The handle unit base body uses harder, denser materials for structural strength and robustness, while the application unit uses softer, more compliant materials for flexibility and user comfort. The coupling unit uses materials and designs optimized for joining these two distinct regions.
Solution Approach 2:
By segmenting the device into handle unit and application unit made from different materials, each component can be manufactured using processes and materials best suited to its specific requirements, rather than requiring the entire device to be made from a single material type.
3Adaptability or versatility
If the application unit is designed as replaceable, then adaptability is improved, but device complexity increases due to the coupling unit mechanism
Solution Approach 1:
The device is segmented into a permanent handle unit and a replaceable application unit, connected through a coupling unit. This segmentation enables the application unit to be easily detached and replaced with different variants, providing adaptability while keeping the complex handle unit as a single reusable component.
Solution Approach 2:
The coupling unit is designed with universal characteristics that allow different application units to be attached to the same handle unit. This multi-functional coupling mechanism supports various application unit types (different bristle configurations, sizes, or functions) while maintaining a consistent interface with the handle unit.
Data Source
AI summary
An oral hygiene device, in particular a toothbrush, includes at least one application unit having a base body, further includes at least one handle unit, in particular a manual handle unit, having a base body, and including at least one coupling unit for releasably coupling the application unit to the handle unit, wherein the base body of the handle unit has a hardness and/or a density that is greater than a hardness and/or density of the base body of the application unit.