Self-Penetrating Wall Anchor for Hard Walls Without Pre-Drilling
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Solution Overview
Problem
Existing anchoring methods for securing objects to hard walls, such as nails and screws, lack sufficient pulling resistance and require pre-drilling, limiting their use to light-weight objects and necessitating additional tools like drills.
Innovation Solution
A self-penetrating wall anchor with a rigid body and a piercing distal-end that can be hammered into hard walls without pre-drilling, featuring an internal threaded recess for securing a screw, and designed to prevent turning during screwing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a self-penetrating wall anchor with a rigid body and piercing distal-end is used, then the ability to penetrate hard walls without pre-drilling is improved, but the device complexity increases compared to simple nails
Solution Approach 1:
The patent combines multiple functions into a single integrated component: the piercing distal-end enables self-penetration into hard walls without pre-drilling, while the internal threaded recess provides screw reception and anchoring. This merging eliminates the need for separate drilling and anchoring operations, resolving the contradiction by achieving complex functionality through unified design.
Solution Approach 2:
The wall anchor is divided into functionally distinct segments: a piercing distal-end for penetration and an internal threaded recess for anchoring. This segmentation allows each part to optimize its specific function while maintaining overall simplicity, enabling self-penetration without pre-drilling while avoiding excessive complexity through modular functional design.
2Strength
If expanding wall anchors are used to increase normal force, then pulling resistance is improved, but the device complexity and need for pre-drilled bores increases
Solution Approach 1:
The wall anchor performs self-penetration into the wall using its piercing distal-end, eliminating the need for pre-drilled bores. The internal threaded recess then allows a screw to be driven in, creating anchoring through thread engagement with the wall material itself. This self-service approach achieves pulling resistance without requiring complex expansion mechanisms or pre-drilling operations.
Solution Approach 2:
Instead of expanding outward to create anchoring force (traditional expansion anchors), this design inverts the approach by using a piercing tip to penetrate directly into the wall and relying on thread engagement for anchoring. This inversion simplifies the mechanism while maintaining pulling resistance, avoiding the complexity of expansion components.
3Device complexity
If standard nails are used for simplicity, then ease of operation is improved, but pulling resistance and support capability deteriorates
Solution Approach 1:
The design merges the simplicity of a nail-like single-component structure with the anchoring capability of threaded fasteners. The integrated piercing distal-end and internal threaded recess combine penetration and anchoring functions in one piece, achieving both simplicity and pulling resistance simultaneously rather than requiring separate components or operations.
Solution Approach 2:
The wall anchor serves multiple functions within a single component: self-penetration into hard walls, screw reception, and anchoring. This multi-functionality allows the device to replace both nails (for penetration) and threaded anchors (for anchoring), achieving versatility without increasing operational complexity.
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
Provides secure anchoring for heavy objects without pre-drilling, offering resistance to backward pulling and eliminating the need for additional tools, suitable for various materials including hard and soft surfaces.
Implementation Method 1
hammering the self-penetrating wall anchor (100) of the invention into said wall
Implementation Method 2
an essentially axial threaded recess (102) for receiving a screw
Implementation Method 3
screwing a screw into said wall anchor (100), thereby anchoring said object to said wall
Data Source
Figure 1A~1C
Figure 2~3
Figure 4A~4D
AI summary
The present invention provides a single-piece self-penetrating wall anchor for anchoring an article to a hardwall, said wall anchor comprising a rigid body having: (i) an outer wall(s); (ii) a piercing distal-end for penetrating into said wall (without prior drilling); and (iii) an open proximal-end leading to an axial threaded recess for receiving a screw, wherein said rigid body is non-deformable and having a hardness of at least 40 HRC (Hardness Rockwell C), such as that is does not change in shape upon insertion into a concrete/brick wall, and/or upon receiving a screw into said axial threaded recess.