Blind Hole Mount With Clip Member For Secure Retention
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Solution Overview
Problem
Existing fasteners fail to provide a robust and secure retention of bundled items in reentrant bores, often lacking sufficient grip and reliability due to inadequate frictional forces and easy withdrawal from support surfaces.
Innovation Solution
A mounting assembly with a head portion, stud portion, and a clip member that includes flexible tie engagement features such as abutments, diaphragm springs, and extending arms or barbs to provide frictional resistance and prevent axial withdrawal, ensuring secure bundling and routing of items in reentrant bores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fasteners are used in reentrant bores, then installation is simple, but retention and grip are insufficient
Solution Approach 1:
The fastener is divided into two separate components: a mount member with a stud and a clip member with engagement features. This segmentation allows each component to be optimized for its specific function - the mount member provides structural support while the clip member provides retention through barbs or extending arms that engage with the reentrant bore walls.
Solution Approach 2:
The clip member features asymmetric barbs or extending arms that are oriented to engage with the reentrant bore walls in a direction that prevents axial withdrawal. The asymmetric geometry creates mechanical interlocking that provides superior retention compared to symmetric conventional fasteners.
2Reliability
If conventional fasteners are used, then insertion is easy, but resistance to vibration and jostling is insufficient
Solution Approach 1:
The clip member is designed with flexible extending arms or barbs that can dynamically adjust during insertion and engagement. These features flex outward during insertion to pass through the reentrant bore opening, then spring inward to engage with the bore walls, providing automatic adaptation to the installation geometry while maintaining vibration resistance.
Solution Approach 2:
The engagement features of the clip member change their physical state during installation - transitioning from a compressed or retracted state during insertion to an extended or engaged state when securing the bundle. This parameter change allows easy insertion followed by secure retention under vibration.
3Reliability
If longer mounting studs are used, then retention is improved, but insertion into reentrant bores becomes difficult
Solution Approach 1:
The fastener system separates the stud function (mounting depth) from the retention function (grip strength). The mount member stud can be optimally sized for insertion depth, while the separate clip member provides the retention mechanism, eliminating the need for excessively long studs that would be required if retention depended solely on stud length.
Solution Approach 2:
The clip member acts as an intermediary between the stud and the reentrant bore, providing the retention function without requiring the stud to extend the full length needed for adequate grip. The clip member mediates the connection by engaging with the bore walls independently of the stud length.
4Adaptability or versatility
If conventional fasteners are used, then manufacturing is simple, but removal and reinstallation capability is lacking
Solution Approach 1:
The engagement features are designed to be dynamically reversible - the barbs or extending arms can be flexed or pressed to disengage from the reentrant bore walls, allowing removal and reinstallation. This dynamic engagement mechanism provides adaptability for removal while maintaining secure retention during normal use.
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 improved retention and reliability by utilizing frictional forces and structural engagement to securely fasten bundled items to support surfaces, resisting vibrations and jostling, while allowing easy removal without damage.
Implementation Method 1
The invention may also include a diaphragm spring extending downwardly from the head portion. The diaphragm spring provides tension and resistance when the mounting stud is inserted into a supporting surface.
Implementation Method 2
The aperture or slot preferably includes an abutment, which provides frictional force for the flexible tie when the flexible tie tail is inserted in the aperture during bundling.
Data Source
AI summary
A mounting assembly including a mount member having a head portion and a stud portion extending downwardly from the head portion, and a clip member affixed to the stud portion of the mount member. The head portion may include slot which interacts with a flexible tie for bundling elongate items. The flexible tie may be integrally formed with the assembly or may be provided as a separate piece. A clip member for use with the assembly clip member includes at least one extending arm portion for engaging a reentrant bore and preventing axial withdrawal of the assembly. The arm portion may have a bifurcated end. A diaphragm spring extending downwardly from the head portion may also be provided.