Replaceable Toothbrush Head Dovetail Connection
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Solution Overview
Problem
Existing power toothbrushes face challenges in replacing worn-out bristle heads without compromising the mechanics or requiring special tools, especially when they contain energy sources, leading to increased costs and material usage.
Innovation Solution
A replaceable toothbrush head design that accommodates an energy source on the main unit, featuring a plate-like bristle carrier and a dovetail connection system allowing for easy removal and replacement without tools, minimizing material usage and maintaining the energy source's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the toothbrush head contains an energy source, then the cleaning functionality is enhanced, but the head size increases making it too large for effective oral cleaning
Solution Approach 1:
The toothbrush system is divided into two separate components: the main unit containing the energy source and mechanical components, and a separate head containing only the bristles and bristle carrier. This segmentation allows the energy source to remain in the main unit while the head remains compact and suitable for oral cleaning.
Solution Approach 2:
The connection mechanism uses a dovetail configuration that engages in multiple dimensions - horizontal insertion and vertical locking - allowing secure attachment without increasing the head's volumetric space requirements.
2Strength
If the toothbrush head is made secure and durable, then the attachment strength increases, but the difficulty of removal and replacement increases
Solution Approach 1:
The connection mechanism transitions from a static permanent bond to a dynamic reversible connection. The dovetail geometry with horizontal insertion and vertical locking allows the head to be securely attached during use but easily removed by reversing the insertion motion, providing both strength and ease of replacement.
Solution Approach 2:
The dovetail connection structure acts as an intermediary mechanism between the main unit and head, providing a controlled interface that balances attachment strength with ease of separation through its geometric design.
3Manufacturing precision
If special tool connections are used for the toothbrush head, then the attachment precision increases, but the ease of operation decreases requiring special tools
Solution Approach 1:
The dovetail connection mechanism is designed to be self-aligning and self-securing during horizontal insertion, with the vertical locking occurring automatically without requiring external tools. The geometry itself provides the precision and security normally requiring specialized attachment tools.
Data Source
AI summary
A toothbrush with a replaceable head formed to permit ready removal and attachment preferably without the use of a tool. The replaceable toothbrush head may advantageously be formed for coupling with a power toothbrush, particularly, a power toothbrush with a power element that protrudes from the toothbrush head. The replaceable toothbrush head thus preferably is formed to accommodate the power element. In a preferred embodiment, the replaceable toothbrush head is rotated about a rotation axis into engagement with the head of the toothbrush main unit. The replaceable toothbrush head may be moved axially along the rotation axis for alignment with an alignment axis. Preferably, the replaceable toothbrush head is moved axially into engagement with the power element for alignment for coupling with the toothbrush main unit.