Quarter-Turn Connecting Member for Tool-Free Structural Joints
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Solution Overview
Problem
Existing connecting solutions for structural elements, such as furniture panels and toys, require tools for assembly and disassembly, are time-consuming, and do not allow for quick and safe releasable connections, especially when elements are not parallel or perpendicular.
Innovation Solution
A connecting member with an operating unit and a receiving unit, featuring a T-shaped pin, collar, and elastic elements, allowing for tool-free, quick, and secure attachment and detachment of structural elements by a quarter-turn mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional connecting solutions (pins with T-shaped heads, quarter-turn clamps) are used, then reliable connection of structural elements is achieved, but tools are required for assembly and disassembly, making the process time-consuming
Solution Approach 1:
The connecting member enables tool-free operation through self-contained mechanisms. The operating unit integrates all necessary components (pin, handle, elastic element) to perform insertion, securing, and release functions without external tools, allowing users to quickly assemble and disassemble structural elements themselves
Solution Approach 2:
The connecting member is divided into distinct functional units: an operating unit with pin and handle for insertion and actuation, an elastic element for securing, and a receiving unit with cavity and protrusions for engagement. This segmentation allows each component to perform its specific function efficiently without requiring tools
2Reliability
If traditional connecting solutions are used, then structural elements can be connected, but the process requires multiple steps and tool operations, reducing productivity
Solution Approach 1:
The elastic element is pre-loaded onto the pin during manufacturing, and the receiving unit is pre-configured with the cavity and protrusions. During assembly, the user simply needs to insert the operating unit and rotate the handle, with the elastic element automatically engaging the protrusions to secure the connection without additional steps
Solution Approach 2:
Multiple functions are merged into a single integrated connecting member: the pin provides insertion and positioning, the handle enables rotational actuation, the elastic element provides securing force, and the receiving unit enables engagement. This consolidation allows one-component assembly that secures structural elements quickly without requiring separate tools or multiple operations
3Ease of operation
If simple pin connections are used, then assembly is quick, but the connection may accidentally disengage or rotate during use, reducing reliability
Solution Approach 1:
The receiving unit features an asymmetric design with a cavity and specific protrusion arrangement that corresponds to the shaped head of the pin. This asymmetric geometry prevents rotational movement of the pin within the cavity and ensures proper orientation, while the elastic element provides form-locking engagement that prevents accidental disengagement
Solution Approach 2:
The elastic element is pre-loaded onto the pin to provide continuous securing force. This elastic cushioning ensures that the connection remains secure under varying loads and prevents accidental disengagement, while the form-locking engagement of the pin head with the receiving unit prevents rotational movement
4Adaptability or versatility
If reusable connecting solutions are used, then connections can be made multiple times, but parts may be lost during disassembly, reducing ease of operation
Solution Approach 1:
The operating unit (pin with handle) and elastic element are integrated as a single assembly that remains connected during disassembly. When the user rotates the handle to release the connection, the entire operating unit is withdrawn as one piece, preventing loss of components. The receiving unit remains on the structural element for reuse
Solution Approach 2:
The connecting member is designed to be reconfigured multiple times without requiring separate storage or handling of individual components. The integrated design allows users to simply insert, secure, and release the connection repeatedly, with all parts remaining attached to their respective structural elements
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
Enables fast, firm, and safe connections without tools, suitable for various orientations of structural elements, preventing accidental disengagement and minimizing wear, while ensuring easy reconfiguration without losing parts.
Implementation Method 1
The operating unit preferably comprises an elastic element arranged on the pin between the collar and the handle
Data Source
AI summary
A connecting member used in the furniture, toy, and construction industries. The connecting member is adapted to be mounted on a first structural element and a receiving unit adapted to be mounted on a section structure element. The connecting member also relates to the arrangement of the connecting member within structural elements. An operating unit contains a pin at one end forming a neck part and an elongated head, which together form a T-shape. The side of the neck part opposite the side facing the head part forms a collar. The operating unit includes a handle attached to the end of the pin opposite the end where the head part is formed. The receiving unit contains a plate defining an opening suitable for receiving and holding the head part and of a shape corresponding to the shape of a largest cross-section of the head part.