Toothbrush Head Connector With Ball-Snap Anti-Twist Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing manual toothbrushes with exchangeable heads suffer from complex and difficult-to-clean connectors, inadequate anti-twist protection, and poor maneuverability due to loose attachments, which hinder thorough cleaning of hard-to-reach areas in the oral cavity.
Innovation Solution
A connector with a spring-loaded ball-snap mechanism, featuring a recess and a spring-loaded ball element, provides a robust and easy-to-clean attachment system that ensures the head remains securely attached to the handle, preventing twisting during brushing and allowing for simple detachment and reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a complex anchor/engaging mechanism with multiple recesses is used to provide strong connection between head and handle, then connection strength is improved, but cleaning ease deteriorates due to slurry accumulation in recesses
Solution Approach 1:
The connector is divided into functionally distinct elements: a simplified outer geometry for cleaning and a spring-loaded ball-snap mechanism for secure attachment. This segmentation allows the cleaning surface to be simple while the connection mechanism provides sufficient strength through elastic deformation of the spring.
Solution Approach 2:
The connection mechanism transitions from a static geometric interlock to a dynamic spring-loaded system. The spring constant and ball diameter are optimized to provide adequate connection strength while maintaining a smooth, cleanable outer surface without complex recesses.
2Ease of operation
If a simplified connector geometry is used to improve cleaning ease, then cleaning ease is improved, but anti-twist protection deteriorates
Solution Approach 1:
The spring-loaded ball mechanism provides dynamic anti-twist protection. When twisting forces are applied during brushing, the spring deforms elastically to absorb lateral forces while maintaining axial connection strength, preventing the brush head from rotating on the handle.
Solution Approach 2:
The ball-shaped snap element provides omnidirectional resistance to twisting forces. The spherical geometry allows the spring to respond equally to twisting forces from any direction, maintaining stable connection while keeping the connector's outer surface smooth and cleanable.
3Device complexity
If plastic hooks are used for connection, then device complexity is reduced, but reliability deteriorates due to hook relaxation over time
Solution Approach 1:
The spring-loaded ball mechanism is self-adjusting and maintains constant connection pressure. The spring continuously applies radial force to keep the ball engaged with the handle, automatically compensating for wear, deformation, or manufacturing tolerances without requiring user intervention.
Solution Approach 2:
The connector combines elastic spring material with a harder ball and housing material. This composite construction provides both the flexibility needed for reliable engagement and the durability required for long-term use, overcoming the limitations of single-material plastic hook designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The connector ensures stable and intuitive attachment of the brush head, facilitating thorough cleaning of all oral areas while being easy to use and maintain, promoting better oral hygiene and reducing waste through reusable handles and replaceable heads.
Implementation Method 1
the element comprising a ball and a spring, the spring applying a radial force onto the ball in a direction towards the outer lateral surface of the connector
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A connector for repeatedly attaching and detaching a head to and from a handle of a manual oral care implement has an outer surface and a recess. The recess forms a cavity within the connector, wherein the cavity comprises a spring-loaded ball-snap element, the element comprising a ball and a spring, the spring applying a radial force onto the ball in a direction towards the outer surface of the connector.