Prosthesis Delivery Pull-Rod Assembly with Elastic Interlocking
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Solution Overview
Problem
Existing delivery devices for prostheses in minimally invasive surgeries are prone to malfunction due to unintended movement of the control wire, leading to undesired movement of the prosthesis, which can result in system failure.
Innovation Solution
A delivery device with a pull rod assembly and handle housing that includes interlocking components connected by elastic force, allowing relative fixation when the control wire is not manipulated, and unlocking for controlled movement when required, preventing slippage and unintended state changes of the prosthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion and detent grooves configuration is used to fix the delivery assembly, then relative fixation is achieved, but the protrusion is prone to slipping out causing malfunction
Solution Approach 1:
The patent transitions from a static interlocking mechanism (protrusion-detent groove) to a dynamic elastic interlocking mechanism. The elastic component allows the interlocking structure to adapt to movement forces, maintaining reliable fixation while accommodating necessary flexibility during prosthesis delivery and deployment.
Solution Approach 2:
The interlocking structure is divided into separate functional components: a delivery assembly, a control wire, and an elastic component. This segmentation allows each component to perform its specific function optimally while reducing the complexity of the overall system by distributing functionality across multiple specialized elements.
2Ease of operation
If the delivery assembly is manually manipulated to control the control wire, then prosthesis state adjustment is achieved, but unintended movement causes system failure
Solution Approach 1:
The elastic component acts as an intermediary between the delivery assembly and the control wire. It mediates the transmission of manual manipulation forces while filtering out unintended movements, ensuring that only deliberate control actions are transmitted to the prosthesis, thereby improving both ease of operation and reliability.
Solution Approach 2:
The elastic component is pre-configured to resist unintended movements before they can cause system failure. By providing preliminary elastic resistance, it prevents the transmission of accidental forces to the control wire and prosthesis, maintaining reliable state control during manual manipulation.
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 configuration effectively prevents unintended movement of the pull rod, ensuring the prosthesis remains stable and functional, thereby avoiding system failure during minimally invasive surgeries.
Implementation Method 1
The first interlocking component and the second interlocking component are configured to interlock each other under an action of elastic force, so that the main body portion and the housing body remain relatively fixed
Data Source
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AI summary
A conveying device (100), comprising: a pull rod assembly (110), a handle housing (120), and a control wire (130). The pull rod assembly (110) comprises an axis (123) and a pull rod (111), and the pull rod (111) comprises a middle portion (112) and first interlocking components (113) connected to the middle portion (112). The handle housing (120) comprises a handle casing (121) and second interlocking components (122) provided on the handle casing (121). The proximal end of the control wire (130) is connected to the middle portion (112). The first interlocking components (113) and the second interlocking components (122) are configured to be mutually locked under the action of elastic force; the elastic force can be overcome so that the first interlocking components (113) and the second interlocking components (122) are unlocked. The present application further provides a prosthesis system. According to the conveying device (100) and the prosthesis system provided by the present application, after a prosthesis is conveyed to a target position in a human body, the probability of sliding of the control wire (130) can be further reduced when the control wire (130) does not need to be operated, and then unnecessary movement of the prosthesis is further avoided.