Steady Double-Axis Hinge with Movable Detent Plate
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Solution Overview
Problem
Conventional double-axis hinges for electronic devices face issues with stability and complexity, leading to unsteady operation and high production costs due to complicated structures and tolerance problems, which limit their ability to rotate smoothly and securely.
Innovation Solution
A double-axis hinge design featuring a first and second rotation member with sector portions and a movable detent plate that allows sequential rotation, supported by a connection member with recesses and butting portions for secure and smooth movement, reducing production complexity and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional double-axis hinge with multiple components (latch cams, connection plates, rollers, detent portions, barriers) is used to enable sequential rotation, then the hinge can rotate in sequence to maintain stability, but the structure becomes complex with difficult assembly and higher fabrication costs
Solution Approach 1:
The patent merges multiple separate components (latch cam, connection plate, detent mechanism) into a single integrated rotating member. The rotating member includes both the latch cam portion and the detent portion as integral parts, eliminating the need for separate connection plates and multiple assembly steps. This integration maintains the sequential rotation stability while significantly simplifying the structure and reducing fabrication complexity.
Solution Approach 2:
The rotating member serves multiple functions simultaneously: it acts as both the latch cam (engaging with the fixed cam's recesses to control rotation sequence) and the detent mechanism (with detent portions engaging with barriers to restrict rotation at specific angles). This multi-functionality eliminates the need for separate specialized components, reducing overall device complexity while maintaining stable sequential rotation.
2Reliability
If a double-axis hinge with many components is used to achieve sequential rotation, then rotation stability is improved, but assembly and installation become difficult and production costs increase
Solution Approach 1:
The patent combines the latch cam and detent mechanisms into a single rotating member that is directly mounted on the second shaft. This eliminates the need for separate connection plates, rollers, and multiple fastening operations, making assembly straightforward while maintaining reliable sequential rotation through the integrated cam and detent portions.
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate components (connection plates, rollers, separate detent plates) from the mechanism. By removing these extraneous parts and retaining only the essential functional elements (latch cam and detent portions) integrated into the rotating member, the design achieves both rotation stability and ease of manufacture.
3Ease of operation
If a double-axis hinge with complex components is used to enable sequential rotation, then the hinge can rotate smoothly, but fabrication costs become higher
Solution Approach 1:
The patent merges the latch cam and detent mechanisms into a single rotating member, reducing the total number of parts that need to be manufactured, inventoried, and assembled. This integration maintains smooth rotation through the coordinated action of the cam profile and detent portions while significantly reducing fabrication costs by eliminating multiple precision-machined components.
Solution Approach 2:
The rotating member performs multiple functions (latch cam operation and detent restriction) in a single component, reducing the overall bill of materials and manufacturing complexity. This multi-functionality enables smooth sequential rotation while lowering fabrication costs compared to designs requiring multiple specialized parts.
Data Source
AI summary
A steady opening and closing double-axis hinge comprises a first rotation member, a second rotation member and a connection member run through by the first rotation member and the second rotation member in a parallel manner. The first rotation member includes a first shaft and a first sector portion formed on the first shaft. The second rotation member includes a second shaft and a second sector portion formed on the second shaft. The connection member includes a movable detent plate which is located between the first and second shafts and movable between a first operation position and a second operation position. Through the movement of the movable detent plate, the first sector portion and second sector portion can be blocked alternately to control the first and second shafts to rotate in sequence, so as to simplify the shaft rotation switch mechanism and improve the durability.