Auricle Clamp Delivery Linkage for Parallel Arm Motion
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Solution Overview
Problem
Existing auricle clamp delivery apparatuses face challenges in achieving parallel closing and opening of the clamp arms with a simple and convenient structure, which is crucial for effective left auricle occlusion during percutaneous intracardiac intervention.
Innovation Solution
A delivery actuator with a swing seat, first and second tong arms, and a connecting rod mechanism, allowing for parallel movement of the clamp arms through a hinged X-shaped scissor structure and guided sliding of connecting rods, controlled by a mechanism that maintains the angle between the arms during opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional delivery apparatus with traction rope is used to hold and open the clamp arms, then the clamp arms can be opened, but the structure becomes complex and the operation becomes difficult
Solution Approach 1:
The patent removes the complex traction rope mechanism from the delivery apparatus and replaces it with a simplified connecting rod mechanism. The connecting rod mechanism directly connects the driving force to the clamp arms, extracting the unnecessary intermediate components (traction ropes, knots, and complex transmission elements) while maintaining the essential function of opening and closing the clamp arms.
Solution Approach 2:
The patent incorporates spring components in the connecting rod mechanism that provide pre-compression or pre-tension forces. These springs cushion the mechanical transitions and maintain continuous contact between moving parts, ensuring smooth operation without requiring complex control mechanisms for each movement phase.
2Ease of operation
If the clamp arms are opened using a complex traction rope mechanism, then the arms can be separated, but the parallel closing and opening control becomes difficult to achieve
Solution Approach 1:
The connecting rod mechanism employs an asymmetric linkage design where the connecting rods are positioned at different orientations and lengths relative to the clamp arms. This asymmetric arrangement naturally guides the clamp arms to move in parallel during opening and closing, as the geometric constraints of the linkage enforce synchronized motion without requiring additional control mechanisms.
Solution Approach 2:
The mechanism transitions from a static, rope-based system to a dynamic, rigid-linkage system. The connecting rods maintain real-time geometric relationships that dynamically adjust as the clamp arms move, ensuring parallel motion throughout the range of motion. This dynamic constraint enforcement is inherent to the mechanism's design rather than requiring active control.
3Reliability
If existing delivery apparatus structures are used, then the clamp can be delivered, but the operation risk increases and safety needs verification
Solution Approach 1:
The connecting rod mechanism is designed to be self-guiding and self-regulating. The geometric constraints of the linkage automatically ensure that the clamp arms move in the correct parallel fashion, and the spring components automatically maintain proper tension throughout the operation. This self-service design eliminates the need for complex control systems that would increase operational risk, as the mechanism's physics inherently enforce safe and effective operation.
Data Source
AI summary
A delivery actuator and a delivery apparatus are provided. The delivery actuator includes a swing seat, a first tong arm, a second tong arm, and a connecting rod mechanism. The swing seat is rotatably connected to a base. In the connecting rod mechanism, a first connecting rod and a second connecting rod are hinged to each other, and the first connecting rod and the second connecting rod form an X-shaped scissor structure. A hinge shaft of the first connecting rod and the second connecting rod is hinged to the swing seat. First ends of the first connecting rod and the second connecting rod are respectively hinged to the first tong arm and the second tong arm, and second ends of the first connecting rod and the second connecting rod are respectively hinged to first ends of a third connecting rod and a fourth connecting rod.