Forceps Guide Assembly Hollow Snap-Fit Insulation
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Solution Overview
Problem
Existing guide assemblies for electrosurgical forceps face challenges in securely fastening to the inner sides of the legs due to fluctuations in the thickness of insulating coatings, which can lead to inaccurate fits and assembly issues caused by material accumulation and production tolerances.
Innovation Solution
A guide assembly with first and second guide elements featuring a base body with snap-in fastening means, a hollow on the outer side to accommodate coating material accumulation, and conical shoulders for a secure fit, allowing for accurate and elastic attachment to the forceps legs despite varying coating thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating coating is applied to the inner sides of forceps legs, then electrical insulation is improved, but coating thickness fluctuations cause fastening inaccuracies
Solution Approach 1:
The guide element features a localized hollow depression at its distal end that specifically accommodates coating material accumulation at the opening area. This local modification allows the fastening interface to adapt to variable coating thickness without compromising overall fastening accuracy or electrical insulation performance.
Solution Approach 2:
The hollow depression in the guide element creates a variable-volume accommodation space that changes based on coating thickness. When coating is thicker, more material accumulates in the hollow; when coating is thinner, less accumulates. This parameter adaptation allows consistent fastening accuracy despite variations in coating application.
2Manufacturing precision
If plugs are inserted into openings during coating process, then coating completeness is improved, but material accumulation around openings causes fastening failures
Solution Approach 1:
The invention converts the harmful effect of coating material accumulation (which previously caused fastening failures) into a beneficial feature. The hollow depression is specifically designed to capture and accommodate this accumulated material, transforming it from a source of error into a buffer that ensures reliable fastening by preventing the accumulation from interfering with the fastening interface.
3Ease of manufacture
If guide elements are snapped into openings with undercuts, then assembly simplicity is improved, but coating thickness variations prevent accurate engagement
Solution Approach 1:
The hollow depression acts as a pre-prepared cushioning space that anticipates and absorbs the variability in coating thickness. By providing this accommodation space beforehand, the design ensures that the snap-fit engagement between the guide element and the undercut opening can proceed accurately regardless of how much coating material is present, maintaining both assembly simplicity and engagement precision.
Data Source
AI summary
The invention relates to a guide assembly for an instrument comprising two legs, in particular forceps, the guide assembly comprising first and second guide elements, wherein the guide elements each comprise a base body, provision being made in each case on the outer side of the base body for an arrangement for snapping into place in an opening on an inner side of the legs of the instrument, provision being made on the inner side of the base body in the case of the first guide element for a protrusion and in the case of the second guide element for a recess, which is complementary to the protrusion, and provision being made in each case for a hollow on the outer side of the base body of the first as well as the second guide elements.