Surgical Instrument Bonding Channels for Metal-Plastic Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Surgical instruments with components made of different materials, such as metals and plastics, face issues like cracks, gaps, and failures due to differing thermal expansion and stress responses, reducing their useful life.
Innovation Solution
A surgical instrument assembly with components of different materials bonded using a bonding agent, such as a two-part epoxy, where longitudinal and annular channels in the components facilitate uniform distribution of the bonding agent, enhancing mechanical and chemical bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If bonding agents are used to join metal and plastic components, then the components can be assembled together, but the bonding fails over time due to different thermal expansion rates and stress responses
Solution Approach 1:
The bonding interface is segmented into multiple zones with different channel configurations. Longitudinal channels extend along the length of the components while annular channels wrap around the circumference, creating multiple discrete bonding zones that can independently accommodate thermal expansion differences between metal and plastic materials.
Solution Approach 2:
Different regions of the bonding interface have different channel patterns tailored to local requirements. The longitudinal channels provide expansion accommodation in the axial direction while annular channels provide accommodation in the radial direction, with varying channel dimensions and spacing optimized for each specific location's stress and thermal conditions.
2Ease of manufacture
If uniform bonding is applied between components, then assembly is simplified, but stress distribution is uneven leading to cracks and gaps
Solution Approach 1:
The channels are pre-formed as integral features of the components during manufacturing, creating predetermined pathways that guide the bonding agent to specific locations and ensure uniform distribution before assembly. This preliminary channel formation eliminates the need for complex post-assembly bonding procedures while ensuring even stress distribution.
Solution Approach 2:
The channels act as intermediary structures that mediate between the bonding agent application process and the final bonding quality. They control the flow and distribution of bonding agent, ensuring uniform penetration and bonding strength across the entire interface while simplifying the assembly process.
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 assembly provides durable engagement between components, improving reliability and ensuring mechanical failures are predictable, thus extending the instrument's lifespan and maintaining functionality through repeated use and cleaning.
Implementation Method 1
The bonding agent at least partially fills each longitudinal channel of the plurality of longitudinal channels and each annular channel of the plurality of annular channels to bond the first component with the second component
Data Source
AI summary
An assembly of a surgical instrument includes an outer component of a first material and having an interior surface, an inner component of a second, different material and having an exterior surface, and a bonding agent. The inner component is inserted at least partially into the outer component to define a volume between the interior surface of the outer component and the exterior surface of the inner component. The volume includes a plurality of longitudinal channels extending longitudinally along at least a portion of a length of the volume and a plurality of annular channels extending about at least a portion of a circumference of the volume. The bonding agent at least partially fills each longitudinal channel of the plurality of longitudinal channels and each annular channel of the plurality of annular channels to bond the first component with the second component.