Self-retaining Device Attachment Stability Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing self-retaining devices face issues with peeling of the attachment member from the body surface due to vibration and increased manufacturing costs, particularly when the device is deformed to conform to a curved body surface.
Innovation Solution
A self-retaining device with a sheet-shaped attachment member that includes a first section fixed to the main body, a second section adjacent to the first section that can separate, and a periphery section with lateral extension parts, where the boundary adjacent part's width is equal to or wider than the maximum width of the first section adjacent part and wider than the second section adjacent part, enhancing attachment stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the case is deformed to conform to a curved body surface, then peeling of the main body off from the attachment member is reduced, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The attachment member is designed as a flexible sheet structure that can conform to the curved body surface without requiring the main body case to be deformed. The sheet includes a periphery section with lateral extension parts that extend laterally from the first and second sections, allowing the attachment member to adapt to body surface contours while maintaining a simple rigid case structure.
2Adaptability or versatility
If the main body rises over the attachment member to allow the attachment member to follow the body surface, then attachment flexibility is improved, but torque load from vibration causes the attachment member to peel off
Solution Approach 1:
The attachment member is segmented into three distinct sections: a first section fixed to the back surface of the main body, a second section facing the back surface and able to separate, and a periphery section with lateral extension parts. This segmentation allows the second section to rise and follow body surface contours while the first section remains fixed, and the periphery section provides lateral support to prevent peeling during vibration.
Solution Approach 2:
The periphery section includes lateral extension parts that extend in a direction parallel to the arrangement of the first and second sections. These lateral extension parts create an additional dimensional support structure that distributes torque loads from vibration across a wider area, preventing the attachment member from peeling off while allowing the second section to rise vertically to follow body surface contours.
3Ease of manufacture
If the attachment member structure is simplified to reduce manufacturing cost, then manufacturing cost decreases, but attachment stability under vibration may be compromised
Solution Approach 1:
The attachment member is constructed as a flexible sheet structure with specific geometric features (lateral extension parts in the periphery section) that can be manufactured using simple cutting or molding processes. This approach avoids complex multi-component assemblies while providing the necessary structural features to maintain attachment stability under vibration through the lateral extension geometry alone.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A self-retaining device (medicine administration device) includes a main body and a main-body-side attachment sheet. The main-body-side attachment sheet has a first section that fixes a back surface of the main body, a second section that is adjacent to the first section and allows the main body to rise, and a periphery section that projects outward of the first section and the second section and is configured to be attached to a body surface. In the lateral extension parts of the periphery section, a width of a boundary adjacent part overlapping an extension line of a boundary between the first section and the second section is wider than a width of a second section adjacent part positioned on a side closer to the second section than the extension line.