Spring Hinge Pivoting Mechanism for Stable Pin-Cap Connection
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Solution Overview
Problem
Conventional spring hinges experience instability due to the cover member deforming and becoming rotatable relative to the engaging member over time, leading to poor connection between the pin and cap assemblies, which results in damage, unsmooth leaf movement, and a poor reset effect.
Innovation Solution
A pivoting mechanism featuring a pin with a cap assembly that includes a cap body with a first abutting wall, a circumferential wall, and a restricting member, where the engaging member is positioned between the restricting member and the abutting wall, providing structural strength and stability through specific dimensions and design features such as an anti-slip structure and coating to prevent oxidation and rust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cover member is made thin and easily deformable for easy assembling, then the ease of manufacture is improved, but the reliability deteriorates as the cover member deforms unexpectedly and becomes rotatable relative to the engaging member in long-term use
Solution Approach 1:
The cap assembly is divided into multiple functional components: the cap body for structural support, the engaging member for connection, and the restricting member for preventing rotation. This segmentation allows each component to be optimized independently - the cap body can be thin for easy assembly while the restricting member ensures long-term reliability
Solution Approach 2:
The restricting member acts as an intermediary element between the engaging member and the cap body. It mediates the connection by preventing rotational movement while allowing the cap member to remain thin and easy to assemble, thus resolving the contradiction between ease of assembly and connection stability
2Ease of manufacture
If the cover member is made thin for easy deformation during assembly, then the ease of manufacture is improved, but the strength deteriorates as the pin and cap assemblies cannot be stably connected
Solution Approach 1:
The connection structure is segmented into the cap body, engaging member, and restricting member. The cap body can be thin and easy to deform during assembly, while the restricting member provides the necessary strength to prevent rotation and ensure stable connection
Solution Approach 2:
Different parts of the cap assembly have different local qualities: the cap body is thin and deformable for easy assembly, while the restricting member has higher strength and rigidity to prevent rotation. This local differentiation resolves the contradiction between ease of deformation and connection strength
Data Source
AI summary
A pivoting mechanism for a spring hinge includes a pin and at least one cap assembly. The pin defines an axial direction and is configured to be disposed through a barrel portion of the spring hinge. The at least one cap assembly is disposed on an end of the pin and includes a cap body, a restricting member and an engaging member. The cap body includes a first abutting wall lateral to the axial direction, a first circumferential wall extending around the axial direction and connected with the first abutting wall and a groove recessed on an inner surface of the first circumferential wall. The restricting member is embedded within the groove and radially protrudes beyond the inner surface. The engaging member surrounds the pin and is disposed between the restricting member and the first abutting wall.