Lawn Edging Boundary Assembly With Snap-Fit Locking
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Solution Overview
Problem
Existing lawn edging devices require complex assembly processes involving folding and bending, which can lead to tab breakage and are time-consuming, lacking a secure and quick connection mechanism.
Innovation Solution
A boundary device with a connecting element and receiving element at axial ends, featuring a tongue and tab design with a recess and closure element forming a positive latching connection, allowing for tool-free assembly and secure attachment without bending or screwing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tabs are folded over to connect lawn edging strips, then connection is achieved, but tabs may break and assembly is time-consuming
Solution Approach 1:
The connecting element is divided into multiple tongues that fit into corresponding slots, distributing the connection function across multiple points. This segmentation prevents single-point failure and reduces the risk of tab breakage while maintaining simple assembly through the modular tongue-slot interface.
Solution Approach 2:
The tabs are pre-formed with a specific geometry that allows them to be inserted into slots without requiring folding or bending during assembly. The preliminary shaping of tabs and slots enables direct insertion connection, eliminating the need for post-assembly folding that causes tab breakage.
2Reliability
If tabs are folded over to prevent loosening, then connection security is improved, but assembly time increases
Solution Approach 1:
The connecting element features pre-formed tongues and receiving slots that are designed to mate directly without requiring folding operations. This preliminary preparation of connection features eliminates the time-consuming folding step while maintaining secure connection through the tongue-slot engagement.
Solution Approach 2:
The tongue and slot connection system is designed to be self-aligning and self-securing through the geometric interlocking of the tongues with their corresponding slots. The connection automatically secures itself without requiring additional folding or fastening operations, reducing assembly time while maintaining connection security.
3Productivity
If simple plug-in connection is used, then assembly is quick, but connection is not secure and gaps may form
Solution Approach 1:
The connection system uses multiple tongues that fit into corresponding slots, creating multiple discrete connection points along the interface. This segmentation provides both the speed of simple insertion and the security of multiple engagement points, preventing gaps and ensuring robust connection.
Solution Approach 2:
The tongues and slots are designed with asymmetric geometries that provide directional insertion and automatic alignment. The asymmetric shape ensures that the tongues fit securely into their corresponding slots only in the correct orientation, providing both quick assembly through intuitive alignment and secure connection through the asymmetric interlocking.
Data Source
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AI summary
The invention relates to a boundary device (10), in particular for flower beds, gravel, paths, paving, terraces or lawns, comprising a boundary body (11), in particular a sheet metal/plastic molded part, with a connecting element (12) arranged at a first axial end (13) and a receiving element (14) arranged at a second axial end (15), wherein the connecting element (12) has at least one tongue (16) extending in a longitudinal direction of the boundary body (11) and the receiving element (14) has at least one tab (17) for receiving the tongue (16), so that the boundary device (10) can be connected to itself or to another corresponding boundary device (10), wherein at least one recess (18) is arranged in the region of the first or the second axial end (13, 15) and at least one locking element (19) is arranged in the region of the other axial end (13, 15).wherein the locking element (19) forms a positive locking connection, in particular a snap-fit connection, with the recess (18) in the assembled state.