Hinge With Closed-Shape Arm And Protrusions For Strength
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Solution Overview
Problem
Conventional door hinges face a strength enhancement challenge due to the C-shape design of the first arm, which limits the structural integrity when the second arm is inserted, leading to instability under load.
Innovation Solution
The first arm is formed into a closed piece enclosing the opening, with protrusions filling gaps between the second arm and hinge main bodies, allowing stable contact at multiple points and enhancing strength, while the second arm's height is reduced to fit within the opening, ensuring stable load-bearing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first arm is formed into a C-shape to allow insertion of the second arm, then the ease of assembly is improved, but the strength of the first arm deteriorates
Solution Approach 1:
The second arm is inserted into the opening of the first arm, with the main body section of the second arm fitting within the confines of the first arm's structure. This nesting arrangement allows compact assembly while maintaining the load-bearing capacity of both arms through proper geometric design.
Solution Approach 2:
The design transitions from a two-dimensional C-shape to a three-dimensional closed piece structure. The first arm encloses the opening in a closed piece configuration, adding structural rigidity in multiple directions while still permitting the second arm to be inserted through the opening.
2Strength
If a spacer is fitted in the first arm after inserting the second arm to enhance strength, then the strength of the first arm is improved, but the stability deteriorates due to rattling
Solution Approach 1:
The protrusions are integrally formed with the first arm during manufacturing, before assembly. These protrusions extend into the opening to contact the second arm, providing both strength enhancement and stability prevention without requiring separate spacer components that could rattle.
Solution Approach 2:
The protrusions are merged with the first arm as an integral structure rather than being separate components. This integration eliminates the rattling issue associated with separate spacers while maintaining the strength-enhancing function, as the protrusions are firmly attached to the first arm.
3Adaptability or versatility
If the height of the main body section of the second arm is reduced to fit within the opening, then the adaptability is improved, but the load-bearing capacity deteriorates
Solution Approach 1:
The second arm features a main body section with reduced height for fitting within the opening, while other sections maintain full dimensions for load-bearing. This localized dimensional variation allows the arm to fit within the confined space while preserving structural integrity where needed.
Solution Approach 2:
The hinge system combines multiple components (first arm, second arm, protrusions) with complementary geometric features that work together to achieve both compact fit and high load-bearing capacity. The composite structure allows each component to be optimized for its specific function while contributing to overall system strength.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
Provided is a hinge capable of increasing strength. A first arm 3 has an opening 3g and is formed in a closed shape that encloses the opening 3g. A second arm 4 has a main body section 4c inserted into the opening 3g of the first arm 3 and having its height not exceeding the height of the opening 3g in the vertical direction. First and second protrusions 31 and 32 are provided that fill a gap between the main body section 4c of the second arm 4 and a second hinge main body 2, and third and fourth protrusions 33 and 34 are provided that fill a gap between the main body section 4c of the second arm 4 and a first hinge main body 1.