Double connector for butt-joining two parts
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Solution Overview
Problem
Existing methods for butt-joining furniture components require tools and are not invisible, and do not ensure secure connection independent of component thickness or position.
Innovation Solution
A double connector system comprising two synchronously moving connector components with spreadable ends and locking mechanisms that securely anchor into component holes, allowing tool-free, center-aligned connection of components regardless of thickness, using U-shaped clamps or plug components with guide channels and locking springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If eccentric connection fittings with rotatable cam are used, then two furniture components can be tightened and secured, but tool-free assembly cannot be achieved and the connection is not invisible
Solution Approach 1:
The connector is divided into two separate connector components that can be inserted independently into holes of each furniture component. Each connector component has a first end portion for insertion and a second end portion for spreading, allowing the connection to be made in two independent stages without requiring tools or complex sequential operations.
Solution Approach 2:
The connector components are designed to be self-assembling through a spreading mechanism. When the second end portions are pushed together, they automatically spread the first end portions outward to engage with the hole walls, eliminating the need for external tools or manual tightening operations.
2Adaptability or versatility
If traditional connection fittings are used, then components can be joined, but the connection is not position-independent and may be incorrectly assembled
Solution Approach 1:
The connector components are designed with asymmetric features including a central clamp arm and two outer clamp arms positioned at specific angles. This asymmetric geometry ensures that the components can only be assembled in the correct orientation, preventing incorrect assembly while maintaining position independence.
Solution Approach 2:
The connector components are designed to be universally applicable to furniture components of various thicknesses and positions. The spreading mechanism adapts to different hole distances, and the identical design of both connector components allows them to be interchangeable, ensuring correct assembly regardless of which component is inserted first.
3Strength
If connector components are spread to anchor in hole walls, then secure connection is achieved, but structural integrity of thin materials like high-gloss-lacquered chipboard may be compromised
Solution Approach 1:
The connector components apply spreading force locally at the first end portions where they engage with the hole walls, rather than distributing force across the entire component. This localized anchoring provides secure connection while minimizing stress on the surrounding material, preventing buckling of thin materials like high-gloss-lacquered chipboard.
Solution Approach 2:
The connector components transition from a compressed state during insertion to a spread state during anchoring. This dynamic transformation allows the connectors to adapt to the hole dimensions and apply optimal anchoring force without excessive stress on the material, ensuring secure connection while protecting material integrity.
Data Source
AI summary
A double connector for butt-joining two components includes two connector components which can be pushed together as far as a locked assembly position and which each have an spreadable first end portion for inserting into a hole of a component, and a second end portion for spreading the first end portion of the other connector component in each case in the assembly position and at least one locking portion for interlocking the two connector components in the assembly position.