Tapered J-Tip Protective Cap to Prevent Guide Wire Escape
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Solution Overview
Problem
Conventional J-tip protective caps fail to prevent the unintended escape of the J-tip of a medical guide wire during transport or use due to thrust forces, leading to unprotected J-tips.
Innovation Solution
A J-tip protective cap with a distal hollow disk-shaped receiving section and a tapered J-tip passage slot, featuring conical contact surfaces and a high coefficient of adhesive friction, which securely holds the J-tip in place using a combination of transverse and adhesive forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the J-tip receiving section has a circular arc-shaped radial inner rim conformal with the J-tip, then the J-tip can be easily inserted into the protective cap, but the J-tip can escape during transport due to thrust forces
Solution Approach 1:
The invention changes the geometric parameters of the receiving section by introducing a tapered configuration with conical contact surfaces. The taper angle and surface orientation are specifically designed to create both easy insertion and secure retention. The conical surfaces are oriented to provide mechanical interlocking that prevents escape during transport while maintaining smooth insertion.
Solution Approach 2:
The invention uses curved conical contact surfaces instead of flat or simple circular arc surfaces. The conical geometry provides progressive engagement during insertion and creates a locking effect during transport. The curved surfaces distribute forces evenly and prevent the J-tip from sliding out under thrust forces.
2Ease of manufacture
If the protective cap structure is simple and space-saving, then manufacturing is easier and more economical, but the cap cannot prevent J-tip escape under thrust forces
Solution Approach 1:
The invention achieves reliable protection through optimized geometric parameters rather than complex structures. The tapered receiving section with specific cone angles and surface orientations provides escape prevention using simple conical geometry that can be manufactured with standard machining processes. The design uses dimensional parameters (taper angle, surface orientation) to create mechanical interlocking without adding structural complexity.
3Device complexity
If the receiving space has constant lateral width, then the structure is simpler, but the J-tip can slide along the radial inner rim and escape through the passage slot
Solution Approach 1:
The invention changes the lateral width parameter from constant to tapered variable. The receiving space width decreases in the radial direction according to a conical profile, creating contact surfaces that mechanically lock the J-tip. This parameter change transforms the geometry from a simple cylinder to a tapered structure that provides both easy insertion 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 cap effectively prevents the J-tip from escaping by maintaining a secure grip through conical tapering and adhesive friction, ensuring protection during handling and use.
Implementation Method 1
a high coefficient of adhesive friction, which securely holds the J-tip in place using a combination of transverse and adhesive forces
Data Source
AI summary
A J-tip protective cap for a J-tip of a medical guide wire includes a proximal sleeve section, a distal hollow disk-shaped J-tip receiving section, which extends distally and laterally on one side in a distal end region of the sleeve section with a disk longitudinal axis perpendicular to a longitudinal axis of the sleeve section and forms a J-tip receiving space in the interior, and a J-tip passage slot which leads proximally into the J-tip receiving space and which is composed of an axial slot section in the sleeve section and a circumferential slot section in the J-tip receiving section. The J-tip receiving space has a tapered region, in which it tapers in a radially outward direction in its lateral width, and opposite inner sides of the J-tip receiving section form J-tip contact surfaces in the tapered region of the J-tip receiving space.