Mechanical Floor Panel Locking with Shallow Vertical Engagement
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Solution Overview
Problem
Existing thin floor panels, such as luxury vinyl tiles (LVT), face challenges with increased weight, temperature sensitivity, and high production costs due to the need for deep vertical locking grooves and elements, which are exacerbated by the use of high-density materials and complex locking systems.
Innovation Solution
A locking system for floor panels that utilizes a tongue and tongue groove for vertical locking, with a strip body featuring cavities and downward protrusions, allowing for reduced vertical distance between locking elements and grooves, enabling thinner panels with improved temperature stability and reduced weight, and incorporating cost-effective production methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If deep vertical locking grooves and elements are used in thin floor panels, then locking strength is improved, but panel thickness and weight increase
Solution Approach 1:
The locking system is divided into separate functional components: a tongue element extending from one panel edge and a groove element formed in the adjacent panel edge. This segmentation allows each component to be optimized independently for strength while minimizing material usage, resolving the contradiction between locking strength and panel weight.
Solution Approach 2:
The locking mechanism transitions from relying solely on vertical groove depth to utilizing horizontal projection dimensions. The tongue element extends horizontally beyond the panel edge and engages with the groove element in a complementary horizontal arrangement, reducing the need for deep vertical grooves and thereby reducing panel thickness and weight while maintaining locking strength.
2Strength
If high-density materials are used to strengthen floor panels, then structural integrity is improved, but temperature sensitivity increases
Solution Approach 1:
High-density material is applied locally only in critical areas where structural integrity is needed, such as the tongue and groove locking components and edge regions, rather than throughout the entire panel. This localized reinforcement maintains overall panel flexibility and reduces temperature sensitivity while ensuring sufficient strength for mechanical locking.
Solution Approach 2:
The floor panel employs composite construction with high-density material concentrated in the locking mechanism components and low-density material in the main panel body. This composite approach provides the necessary structural integrity for locking while maintaining the flexibility and temperature stability of the overall panel system.
3Reliability
If complex locking systems are implemented in thin panels, then locking reliability is improved, but production cost increases
Solution Approach 1:
The tongue element and groove element are designed to be integrated directly into the panel manufacturing process, eliminating the need for separate assembly steps. The locking components are formed as integral parts of the panel edges during production, simplifying manufacturing and reducing costs while ensuring reliable locking engagement.
Solution Approach 2:
The tongue and groove locking elements are pre-formed during panel manufacturing before installation. This preliminary formation of the locking mechanism ensures precise dimensional accuracy and reliable engagement while eliminating complex post-installation assembly operations, thereby reducing production costs and improving locking reliability.
Data Source
AI summary
Building panels provided with a locking system for vertical and horizontal locking of a first edge and a second edge of adjacent panels. The locking system includes a displaceable tongue at least partly arranged in a displacement groove, a tongue groove, a cavity provided in a strip at the first edge, and a protrusion extending downwards at the second edge. The displaceable tongue is arranged to be displaced at least partly into the tongue groove during locking, and wherein the protrusion is arranged to be located in least a portion of the cavity when the panels are locked vertically and horizontally.