Medical Ratchet Wrench Flat Arm Sterilization Design
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Solution Overview
Problem
Ratchet wrenches used in surgeries often have encapsulated ratchet mechanisms that are difficult to clean and sterilize, leading to bacterial contamination and potential infections.
Innovation Solution
A ratchet wrench design with a ratchet mechanism arranged on a flat arm, allowing easy access for cleaning and sterilization, featuring a pivoting spring-loaded finger and a gear element with a leaf spring for effective operation and minimal parts, and an open interior space between flat arms for external access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ratchet mechanism is arranged within a housing, then the structure is compact and protected, but cleaning and sterilization become ineffective leading to bacterial contamination
Solution Approach 1:
The handle is divided into two flat arms that form an open interior space, allowing the ratchet mechanism to be segmented from the housing structure. This segmentation enables cleaning solutions to access all surfaces of the ratchet mechanism while maintaining structural integrity during use.
Solution Approach 2:
The ratchet mechanism is extracted from the enclosed housing and positioned in the open interior space between the flat arms. This extraction allows direct access to the ratchet mechanism for cleaning and sterilization while maintaining its functional integration with the drive element.
2Object-affected harmful factors
If the ratchet mechanism is encapsulated by the housing, then the structure is stable and protected, but bacteria and impurities remain trapped leading to infections
Solution Approach 1:
The handle structure transitions from a fully enclosed three-dimensional housing to an open framework with two flat arms. This dimensional change creates an accessible interior space that maintains structural stability while eliminating trapped areas where bacteria could accumulate.
3Adaptability or versatility
If the actuation element provides spaces for direction changing, then the ratchet mechanism is functional, but these spaces become breeding grounds for bacterial strains
Solution Approach 1:
The actuation element is designed with dynamic access to the interior space, allowing cleaning solutions to reach all areas where direction changing occurs. The open structure between the flat arms enables continuous access to functional spaces rather than creating static enclosed areas.
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
Enhances cleaning and sterilization efficacy, reducing the risk of bacterial contamination and infection by providing easy access to the ratchet mechanism, ensuring effective use in sterile environments.
Implementation Method 1
The spring-loaded finger is provided with a spring force in any of its positions such that the finger will always be forced to be in contact with the gear element
Implementation Method 2
the spring-loaded finger pivots around said bolt which is in a fixed connection with the arm(s)
Implementation Method 3
a drive element which is rotatable around an axis with respect to the handle and which is adapted to tighten or loosen a respective element
Implementation Method 4
A ratchet mechanism is in connection with said drive element and which permits movement with respect to the handle in a first direction of rotation and blocks movement in the other direction of rotation
Data Source
AI summary
A ratchet wrench for use in connection with medical instruments comprises a handle and a drive element which is rotatable around an axis (M) with respect to the handle. The wrench is adapted to tighten or loosen a respective element and a ratchet mechanism which is in connection with the drive element and which permits movement with respect to the handle in a first direction of rotation (R1) and blocks movement in the other direction of rotation (R2). The handle comprises a flat arm, wherein the ratchet mechanism is arranged on a bearing surface of the flat arm, and wherein the drive element extends through an opening in the flat arm in which opening the drive element is rotatably arranged.