Dental Instrument Tip Orientation and Securing Mechanism
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Solution Overview
Problem
Current dental instruments with replaceable tips lack effective securing mechanisms, leading to potential misorientation and imprecise tip movement, and require external lab sharpening or replacement, causing inconvenience and increased costs.
Innovation Solution
A dental instrument design featuring a middle body with distinct tip connection interfaces for right-handed and left-handed tips, secured by collets and end caps with springs, allowing for secure and observable tip orientation and easy replacement at the dental office.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple tip connection interface is used, then the device complexity is reduced, but the tip cannot be securely fastened and may move or become misoriented during use
Solution Approach 1:
The collet is nested within the end cap assembly, with the collet containing the tip and the end cap securing the collet. This nested structure provides a compact yet reliable securing mechanism that prevents tip movement while maintaining reasonable device complexity. The collet's inner bore receives the tip, and the end cap's inner bore receives the collet, creating a nested hierarchy that ensures secure fastening.
Solution Approach 2:
The collet acts as an intermediary component between the tip and the end cap. Rather than directly connecting the tip to the end cap, the collet mediates the connection, providing a secure grip on the tip through its contracting walls while being secured by the end cap. This intermediary structure enables reliable tip securing without requiring a complex direct connection mechanism.
2Reliability
If a secure tip fastening mechanism is implemented, then tip movement is prevented, but the device complexity increases due to additional components like collets and end caps
Solution Approach 1:
The securing mechanism is segmented into distinct functional components: the collet for gripping the tip, the end cap for securing the collet, and the spring for providing contracting force. This segmentation allows each component to perform its specific function efficiently while maintaining overall system manageability. The modular nature of these segments enables easy assembly and disassembly for tip replacement.
Solution Approach 2:
The spring-loaded collet mechanism provides self-service by automatically contracting to grip the tip when the end cap is secured, and automatically releasing when the end cap is removed. The spring's elastic properties enable the collet to self-adjust and self-secure the tip without requiring additional actuating mechanisms, thereby reducing overall device complexity while maintaining reliable tip securing.
3Adaptability or versatility
If right-handed and left-handed tips can be installed at either end, then the adaptability is improved, but it becomes difficult to observe the correct tip orientation
Solution Approach 1:
The connection interface incorporates asymmetric features that distinguish right-handed from left-handed tip orientations. The collet and end cap assembly have asymmetric internal geometries that accommodate only the correct handedness in the correct orientation. This asymmetry provides visual and tactile cues to users, making it immediately observable when a tip is incorrectly oriented, while still allowing adaptability through proper orientation selection.
4Reliability
If tips are sent to external labs for sharpening or replacement, then professional service is ensured, but time is lost and costs increase
Solution Approach 1:
The dental instrument enables self-service tip replacement by incorporating a user-friendly end cap removal and reattachment mechanism. Dental professionals can remove worn tips and install fresh tips directly in the office by simply removing the end cap, replacing the tip, and resecuring the end cap. This self-service capability eliminates the need to send instruments to external labs, reducing both time loss and service costs while maintaining tip maintenance quality through proper securement mechanisms.
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
Ensures precise tip orientation and easy replacement, reducing costs and inconvenience by allowing dental professionals to maintain and switch tips within the office, enhancing tool performance and usability.
Implementation Method 1
a pair of springs; One of said springs may be positioned nearer the first end of said middle body to bias a collet toward the first end of the middle body
Data Source
AI summary
A dental instrument device includes a middle body with two ends, a pair of removable instrument tips, a pair of securing collets, and a pair of removable end caps. Each end of the middle body terminates in a middle body/instrument tip connection interface that receives a right-handed instrument tip only in a first orientation and a left-handed instrument tip only in a second orientation differing from the first orientation. The removable instrument tips have a similar middle body/instrument tip connection interface, and a working instrument end with a right-handed or a left-handed orientation. A right-handed instrument tip is releasably connected to the first middle body/instrument tip connection interface, and a left-handed instrument tip is releasably connected to the second middle body/instrument tip connection interface, with the right-handed and left-handed orientations being visually distinguishable one from the other by casual observation of an ordinary observer.