Aiming Device Elastic Finger Sleeve Locking
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Solution Overview
Problem
Existing target devices for training prostheses often cause damage to surrounding tissue during the insertion of recesses in bones, and they can be cumbersome to handle safely.
Innovation Solution
A target device with a protective sleeve that is secured within a guide opening by an elastic finger, which can be axially and radially deflected to provide a holding force, preventing the sleeve from falling out unintentionally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a protective sleeve is used to shield the tool when creating the recess in the bone, then tissue damage is prevented, but the protective sleeve may accidentally fall out of the guide opening and handling becomes cumbersome
Solution Approach 1:
The elastic finger automatically engages with the protective sleeve upon insertion, securing it without requiring manual intervention. The system serves itself by using the insertion motion to trigger the locking mechanism, eliminating the need for separate securing actions while preventing sleeve loss during use.
Solution Approach 2:
The elastic finger acts as an intermediary element between the guide opening and the protective sleeve. It mediates the connection by providing automatic mechanical engagement that secures the sleeve while allowing smooth insertion, thus resolving the conflict between secure retention and easy handling.
2Reliability
If the protective sleeve is secured firmly to prevent falling out, then reliable handling is achieved, but the insertion of the sleeve into the guide opening becomes more difficult
Solution Approach 1:
The elastic finger provides dynamic engagement that adapts to the insertion process. During insertion, the finger deflects to allow smooth passage of the sleeve, then automatically engages to secure it in place. This dynamic behavior resolves the contradiction between easy insertion and firm securing.
Solution Approach 2:
The elastic properties of the finger allow the engagement force to change during insertion. The finger exhibits higher compliance during insertion and higher rigidity during secure positioning, changing the mechanical parameters dynamically to resolve the contradiction between insertion ease and secure retention.
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 effectively prevents tissue damage by maintaining the protective sleeve in place during bone recess insertion, while also simplifying and ensuring reliable handling of the target device.
Implementation Method 1
at least one locking means (40) comprising at least one elastically deflectable finger (50), which can be deflected axially and/or radially with respect to the second axis (X2)
Implementation Method 2
The at least one elastic finger can come into operative contact with the protective sleeve (60) inserted into the guide opening (22), creating a frictional connection with the protective sleeve (60)
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3c
AI summary
The present invention relates to a targeting device (1) for forming an attachment of a prosthesis (8) with a bone attachment element (5) to a bone, comprising a holding means (15) for positioning the prosthesis (8) in a first axis (X1), a receptacle (20) forming a guide opening (22) which is oriented along a second axis (X2) and penetrates the targeting device and is configured to receive a protective sleeve, and a locking means (40) comprising at least one elastically deflectable finger (50) which can be deflected axially and/or radially with respect to the second axis (X2), wherein the first axis (X1) and the second axis (X2) intersect, with the at least one finger (50) projecting into the guide opening (22).