Trocar Anti-Reverse Latch Mechanism for Sealing Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In laparoscopic surgery, large-diameter surgical instruments passing through trocars with small end sealing rings experience significant surrounding forces, leading to co-rotation and loose connections, causing air leakage and disengagement of the end sealing piece from the trocar sleeve, which affects the instrument's functionality.
Innovation Solution
The trocar incorporates an anti-reverse apparatus with a latch and loose switch mechanism, allowing the end sealing piece to be detachably mounted on the sleeve, preventing reverse movement and air leakage, and enabling controlled detachment by pressing the loose switch, thus maintaining a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the end sealing piece is detachably mounted on the sleeve without anti-reverse mechanism, then the structure is simple and easy to assemble, but the end sealing piece may move reversely causing loose connection and air leakage
Solution Approach 1:
The latch is pre-configured in the anti-reverse apparatus to automatically engage with the end sealing piece and prevent reverse movement before it can cause loosening or air leakage. This preliminary protective action ensures connection stability without requiring complex additional mechanisms.
Solution Approach 2:
The anti-reverse apparatus acts as an intermediary mechanism between the end sealing piece and the sleeve. It includes a latch that engages with a limiting block on the end sealing piece, preventing reverse movement while maintaining the simplicity of the overall structure through this intermediate protective component.
2Reliability
If a latch mechanism is added to prevent reverse movement, then the connection reliability is improved, but the device complexity increases
Solution Approach 1:
The anti-reverse apparatus is designed to be self-activating through spring elasticity. When the end sealing piece is installed, the spring automatically pushes the latch into the engaged position with the limiting block, preventing reverse movement without requiring external control mechanisms or complex actuation systems.
Solution Approach 2:
The latch mechanism utilizes elastic deformation of the spring as a key parameter change to achieve automatic engagement and disengagement. The spring's elastic properties allow the latch to move between engaged and disengaged states based on the installation and removal actions, providing reliable anti-reverse protection through material property changes rather than complex mechanical linkages.
3Reliability
If the latch continuously engages the end sealing piece, then reverse movement is prevented, but the end sealing piece cannot be detached for replacement
Solution Approach 1:
The anti-reverse apparatus employs a dynamic latch mechanism that can transition between engaged and disengaged states. The spring-loaded latch automatically engages to prevent reverse movement during use, but can be easily disengaged by applying force to the pressing block, allowing the end sealing piece to be removed and replaced as needed while maintaining connection security during operation.
Solution Approach 2:
The pressing block provides a user interface that gives tactile feedback when the latch is engaged or disengaged. When the end sealing piece is properly installed, the latch engages and the pressing block indicates this state, allowing the user to understand the connection status and facilitating proper installation and replacement procedures.
Data Source
Figure 1~1-2
Figure 1-3~1-4
Figure 1-5~1-6
AI summary
An anti-reverse apparatus for a trocar and a trocar are provided. The anti-reverse apparatus of the present application includes a latch capable of stopping an end sealing piece from moving reversely, and a loose switch capable of relieving a stopping action exerted by the latch on the reverse movement of the end sealing piece. By pressing the loose switch down, limitation of the latch on the reverse movement of the end sealing piece can be relieved. When the end sealing piece is detachably mounted at a near end of a sleeve in a rotating manner, the latch can stop reverse movement resulting in loosening of the end sealing piece and prevent air leakage or prevent the end sealing piece from loosening from the near end of the sleeve. When the loose switch is pressed down, limitation of the latch on the reverse movement of the end sealing piece can be relieved, and the end sealing piece can be detached from the near end of the sleeve by means of the reverse movement. The trocar of the present application includes the anti-reverse apparatus of the present application, thus improving the reliability of the trocar.