Disposable Dental Handpiece Anti-Reuse Mechanism
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Solution Overview
Problem
Disposable dental handpieces lack effective anti-reuse and anti-suction designs, leading to potential contamination and cross-infection risks due to improper disposal and reuse practices.
Innovation Solution
A high-speed turbine dental handpiece with a detachable and destructible design featuring a clip ring, thermally deformable materials, and a disposable light-emitting component to prevent reuse and ensure single-use safety, including a rubber seal block and anti-return sheet to prevent gas contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disposable dental handpieces are used, then cross-infection risk is reduced, but reliability against reuse and contamination is insufficient
Solution Approach 1:
The dental handpiece is divided into separable components including a handle, a turbine assembly, and a connection structure with plug and socket. This segmentation allows the entire device to be disposed of after single use, eliminating cross-infection risks while maintaining structural manageability through modular design
Solution Approach 2:
The connection structure incorporates a one-way locking mechanism where the plug connector features a conical locking surface that engages with a corresponding surface in the socket connector. This creates irreversible mechanical interlocking through parameter changes in geometric engagement, preventing disassembly and reuse
2Productivity
If high-speed turbine operates, then drilling efficiency is improved, but sucking force causes contamination of therapeutic apparatus
Solution Approach 1:
The turbine assembly is extracted as a separate disposable component that can be easily removed and discarded after use. This extraction eliminates the source of contamination (the turbine housing where viruses could be sucked in) from the permanent therapeutic apparatus, allowing high-speed operation without contamination risk
Solution Approach 2:
The turbine assembly is designed as a disposable component made from cost-effective materials that can be manufactured cheaply. After single use, the entire turbine assembly is discarded rather than disinfected, eliminating contamination risks while maintaining drilling efficiency during the operational period
3Ease of manufacture
If disposable handpiece structure is simplified, then manufacturing cost is reduced, but anti-reuse capability is weakened
Solution Approach 1:
The handpiece is segmented into handle, turbine assembly, and connection structure that can be manufactured separately using cost-effective methods like injection molding. This segmentation enables economical mass production while the integrated one-way locking mechanism in the connection structure provides robust anti-reuse capability without adding significant cost
Solution Approach 2:
The connection structure uses parameter changes in the form of conical surface engagement and one-way locking geometry that are simple to manufacture but provide irreversible mechanical interlocking. These geometric parameter changes create strong anti-reuse capability through straightforward molding processes
Data Source
Figure 1~2
Figure 3~4
AI summary
The high-speed turbine dental handpiece adapted for single safe use comprises a nose, a handle connected to the rear end of the nose, a plug connector disposed at the rear end of the handle, and a clip ring for fixing the handle and the plug connector, wherein the plug connector is provided with a first fixing slot at a side wall, the tail end of the handle is provided with a second fixing slot matched with the first fixing slot, the inner wall of the clip ring is provided with bumps matched with the first fixing slot and the second fixing slot, and when the clip ring is hooped on the plug connector, the bumps are embedded into the first fixing slot and the second fixing slot to limit and fix the handle and the plug connector. The invention effectively prevents the disposable dental handpiece from being reused in various ways, it is simple in structure and convenient to detach and thus can be conveniently detached and destroyed after being used, and in addition, with the disposable light-emitting component, whether the dental handpiece is used can be identified simply and clearly. According to the inventor, the concept of "one handpiece for one patient for single use" as advocated by the WHO in the field of oral health can be achieved, effectively solving the problem of iatrogenic cross infection in the field of stomatology. The invention is similar to a disposable syringe but with a more complex structure as a dental handpiece.