Sliding-Lock Furniture Hinge for Tool-Free Folding Door Assembly
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Solution Overview
Problem
Conventional hinges for folding doors are difficult to assemble and disassemble alone, especially with large and heavy doors, requiring cumbersome lifting, positioning, and screwing, and pose a risk of finger injury due to narrow gaps and weight.
Innovation Solution
A hinge design featuring a linear slide with a locking mechanism and connecting device that allows for assembly without tools and easy disassembly, with a wide gap for safer finger access and reduced risk of injury, enabling single-person operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hinges are used for large and heavy folding doors, then the doors can be connected and rotated, but the assembly and disassembly process becomes cumbersome and dangerous, requiring multiple people and tools
Solution Approach 1:
The hinge is divided into two separate parts: an inner hinge part that attaches to the first folding door and an outer hinge part that attaches to the second folding door. This segmentation allows each part to be independently mounted, enabling safe and easy assembly without requiring multiple people to handle the entire heavy door assembly simultaneously.
Solution Approach 2:
The connecting element features a self-aligning design with a guiding surface that automatically guides the outer hinge part into the correct position on the inner hinge part during assembly. This self-service mechanism eliminates the need for precise manual alignment and reduces the risk of finger pinching, allowing single-person operation.
2Shape
If the gap between folding doors is made small for aesthetic reasons, then the appearance is improved, but the risk of finger pinching and injury increases during assembly and disassembly
Solution Approach 1:
The inner hinge part is pre-mounted on the first folding door before the second door is attached. This preliminary action creates a stable reference point and allows the connecting element to guide the outer hinge part into position from a safe distance, maintaining the narrow aesthetic gap while preventing finger pinching through the self-aligning guiding surface.
3Strength
If positive-locking or friction-locking fasteners are used to connect folding doors to hinges, then the connection strength is improved, but the assembly and disassembly process becomes more complex and time-consuming
Solution Approach 1:
The invention replaces complex positive-locking or friction-locking fastener systems with a simpler connecting element that uses a guiding surface for automatic alignment and a release mechanism for easy disconnection. This mechanical substitution maintains strong connections during use while dramatically reducing assembly and disassembly time, enabling single-person operation without tools.
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
Facilitates easy assembly and disassembly of folding doors without tools, reducing the risk of finger injuries and making the process safer and more manageable for one person.
Implementation Method 1
The connecting element (4) has a locking mechanism in the form of a spring-loaded ball locking mechanism
Data Source
Figure 1a~1b
Figure 2~3
Figure 4a~4b
AI summary
A hinge (1), in particular for a piece of furniture (40), comprises an inner hinge portion (2) that can be attached to the furniture carcass (6) or to a door (12) hinged to the carcass, an outer hinge portion (3) that can be attached to an outer door (13), a connecting device (4) that connects the inner hinge portion (2) to the outer hinge portion (3) so that they can pivot relative to each other, by means of three receiving portions (30a, 30b, 30c), the inner hinge portion (2) having a main body (5) that can be attached to the furniture carcass (6) or to a door (12) hinged to the furniture carcass, and the lower receiving portion (30a) which is movable, preferably slidable, relative to an upper receiving portion (30b) which is mounted, preferably rigidly, on the main body (5).