Quick Stop Drilling Tool With Radial Sensor
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Solution Overview
Problem
Existing quick stop devices for medical or dental drilling tools face challenges when integrated into handpiece heads, particularly due to space constraints and interference with fluid supply, as they require additional space for sensors and hinder the connection to fluid sources.
Innovation Solution
A quick stop drilling tool design with a hollow outer shell and a pre-tensioned probe that includes an electromagnetic sensor integrated along the longitudinal axis, allowing for relative motion detection without additional space at the rear end, enabling connection to fluid sources and effective cooling, and featuring a probe tip that can be eccentrically arranged for improved surface contact and material detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an end position sensor is located on the rear end of the drilling tool to detect axial sliding, then the quick stop function can be implemented, but the device requires additional space in the handpiece head and hinders connection to fluid supply
Solution Approach 1:
The sensor is relocated from the rear end (axial direction) to the side of the drilling tool (radial direction), utilizing the hollow outer shell structure to house the sensor in a different spatial dimension. This allows the sensor to detect probe movement without occupying rear-end space, enabling fluid supply connection while maintaining quick stop functionality.
Solution Approach 2:
The sensor is integrated within the hollow outer shell of the drilling tool, nesting the sensor inside the existing structural cavity. This eliminates the need for additional external space in the handpiece head and allows the sensor to be protected within the tool's own structure while maintaining detection capability.
2Reliability
If the sensor is placed at the rear end to detect probe movement, then the quick stop mechanism works, but the probe cannot be pre-tensioned by a spring element in the drilling direction
Solution Approach 1:
The drilling tool is divided into functional segments: the hollow outer shell contains the sensor and spring element, while the probe is a separate movable component. This segmentation allows the spring element to be positioned independently to provide axial pre-tensioning on the probe, while the sensor detects the probe's position relative to the shell without interference.
Solution Approach 2:
The hollow outer shell acts as an intermediary structure that houses both the spring element and the sensor. The spring element uses the shell as a mounting structure to provide axial force to the probe, while the sensor uses the same shell as a reference frame for detecting probe movement, allowing both functions to coexist without direct interference.
3Measurement precision
If the sensor occupies space at the connection end, then detection is possible, but the drilling tool cannot be connected to fluid supply sources
Solution Approach 1:
The sensor is repositioned from the axial rear-end location to a radial position on the side of the drilling tool, utilizing the hollow outer shell's lateral space. This dimensional relocation allows the sensor to perform detection while the connection end remains clear for fluid supply attachment, achieving both measurement precision and adaptability.
Solution Approach 2:
The hollow outer shell is designed to serve multiple functions: it houses the sensor for detection, provides structural support for the probe, and maintains a clear connection end for fluid supply. This multi-functionality allows the same structural element to support both sensing and fluid delivery operations without space conflicts.
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 solution allows for efficient quick stopping of drilling tools within constrained handpiece spaces while maintaining fluid connectivity and enhancing material removal precision, particularly in dental applications like sinus floor elevation.
Implementation Method 1
an electromagnetic sensor for the detection of relative motion between the outer shell and the probe
Implementation Method 2
a probe pre-tensioned by a spring element is held, that can be moved along the longitudinal axis relative to the outer shell
Data Source
AI summary
A quick stop drilling tool for use with a medical or dental treatment device includes a drilling tool having a body extending between a connection end and a working end and having a longitudinal extension along a longitudinal axis of the drilling tool. The drilling tool has a hollow outer shell in which a probe is held that can be moved along the longitudinal axis so that a part of the probe can be moved out of the shell through an opening. The probe is designed as an elongated pin, and its first end facing the connection end is held in the interior of the hollow outer shell. An electromagnetic sensor for detecting relative movement between the shell and the probe is arranged along the longitudinal extension of the body. The drilling tool has a channel for a treatment fluid extending along the longitudinal axis.