Tool-Free Tension Lock with Snap-Fit Connecting Means
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Solution Overview
Problem
Existing tension locks require specialized tools for assembly, making it difficult to connect components such as thin-walled metal sheets without causing damage or using complex joining processes.
Innovation Solution
The tension lock design incorporates connecting means like locking hooks and assembly stands with spring elements that can be inserted into pre-cut components, allowing for tool-free assembly and disassembly, with the tension lever ensuring secure engagement and preventing unauthorized disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fastening methods (rivet connections, screw connections, welded connections) are used to assemble tension locks, then reliable connection is achieved, but specialized tools are required and the process becomes complex
Solution Approach 1:
The fastening system is divided into separate components: a fastening element with connecting means (locking hook or assembly stand) and a corresponding cut-out in the component. This segmentation allows for tool-free assembly while maintaining reliable connection, as the connecting means can be inserted into and engaged with the cut-out without requiring external tools.
Solution Approach 2:
The tension lock assembly system is designed to be self-sufficient. The fastening elements include integrated connecting means that can autonomously engage with the component cut-outs through simple insertion and engagement actions, eliminating the need for specialized assembly tools or complex procedures.
2Strength
If welded connections are used to attach tension locks to thin-walled components, then strong connection is achieved, but the components are difficult to process and may be damaged
Solution Approach 1:
The patent replaces welded connections (thermal/chemical process) with a mechanical snap-fit connection system. The connecting means (locking hook or assembly stand) engages with the cut-out through mechanical interlocking, providing sufficient connection strength for thin-walled components without the need for welding, which would damage or complicate the thin-walled structure.
Solution Approach 2:
The connection method changes from a permanent welded joint to a detachable mechanical engagement. The connecting means can be inserted into and removed from the cut-out, providing adjustable and reversible connection strength that adapts to different applications while preserving component integrity.
3Ease of operation
If the connecting means are accessible from the outside, then assembly is easy, but unauthorized disassembly becomes possible
Solution Approach 1:
The connecting means are positioned such that they are enclosed or covered by the tension lever in the closed position. This nesting arrangement allows the connecting means to be accessible for assembly from the rear or inside when the tension lever is closed, while preventing unauthorized disassembly from the outside, thus maintaining both assembly ease and security.
Solution Approach 2:
Instead of making connecting means accessible from the front for easy assembly, the design allows assembly from the rear or inside through the tension lever mechanism. This inverted approach maintains assembly ease while simultaneously providing security, as the connecting means are not exposed to external access.
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
This solution enables reliable, tool-free assembly and disassembly of tension locks on components, particularly thin-walled metal sheets, by using snap connections and force-fitting mechanisms, ensuring secure engagement and preventing unintentional opening.
Implementation Method 1
at least one connecting means which can be inserted into a cut-out in one of the two components in order to engage behind the cut-out from its rear, wherein at least one connecting means is configured as an assembly stand with spring element
Data Source
AI summary
The invention relates to a tension lock for mounting, without tools, on two components to be interconnected, including: - a first fastening element for connecting the tension lock to the first component; - a second fastening element for connecting the tension lock to the second component; and - a tensioning lever for actuating the tension lock, the tensioning lever being movably connected to at least one of the two fastening elements. According to the invention, in order to allow the tension lock to be mounted, without tools, on the components to be interconnected, the first fastening element and/or the second fastening element has at least one connecting means for establishing a connection, more particularly an interlocking connection, to an opening in the component, which connection can be made without tools. The invention also relates to a system for mounting a tension lock of this type, without tools, on two components to be interconnected.