Screw Hole Notch Guide for Recessed Fastening
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Solution Overview
Problem
Conventional screw holes that are recessed or not easily accessible cause difficulties in screw placement and insertion, leading to increased assembly time and potential issues with parts becoming irreversibly fixed.
Innovation Solution
A through screw hole with a counterbore surface featuring a notch with an inclined slope, serving as a guide for screw insertion, allowing for faster and more accurate positioning of screws, even when the hole is not visible or easily accessible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screw hole is recessed or not easily accessible, then the structural integrity and design flexibility are improved, but the ease of screw placement and assembly time are worsened
Solution Approach 1:
The notch is pre-formed in the counterbore surface to create a guide structure that directs the screw into the hole during assembly. This preliminary structural feature eliminates the need for manual alignment efforts, allowing operators to simply drop screws into the notched opening where they are automatically guided to the correct position and orientation.
Solution Approach 2:
The notch acts as an intermediary element between the operator and the recessed screw hole. It provides a visible and accessible entry point that mediates the transition from the external environment to the hidden recessed hole, facilitating easy screw insertion without requiring direct access to the hole itself.
2Adaptability or versatility
If the screw hole is recessed or not easily accessible, then the structural integrity and design flexibility are improved, but the assembly time is increased
Solution Approach 1:
The notch is pre-formed in the counterbore surface to create a guide structure that directs the screw into the hole during assembly. This preliminary structural feature eliminates the need for manual alignment efforts, allowing operators to simply drop screws into the notched opening where they are automatically guided to the correct position and orientation.
Solution Approach 2:
The notched counterbore structure is self-guiding, automatically directing the screw into the correct position without requiring operator intervention for alignment. The geometry of the notch itself performs the guiding function, making the assembly process self-service and eliminating time-consuming manual positioning steps.
3Strength
If the screw hole is recessed, then the structural integrity is improved, but the removability of the part is worsened
Solution Approach 1:
Instead of making the hole more hidden or complex to maintain structural integrity, the invention inverts the approach by creating a prominent notch feature that actually facilitates access and removal. The same recessed structure that provides strength is given a contrasting visual and physical feature (the notch) that aids in easy screw insertion and extraction for repair purposes.
Data Source
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AI summary
The invention relates to a member defining a screwing through hole capable of receiving a screw comprising a first end with a corresponding spot facing surface coaxial with said hole and a second protruding end, characterised in that said spot facing surface comprises a slot extending in the screw insertion direction, said slot having an inclined slope such that the slope rises from the first end of the screwing hole in order to provide a guide when positioning the screw into said hole.