Lateral Cabinet Swing Leaf Dual-Axis Hinge Mechanism
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Solution Overview
Problem
Existing access control gates with double tilting leaves have a low extension ratio compared to their width, resulting in cumbersome side boxes and complex deployment mechanisms, which limits their efficiency and increases costs.
Innovation Solution
The side box design incorporates a secondary pivot connection for the secondary flap, a rigid part hinged to both flaps, and a drive mechanism with a crank and slider, allowing for a greater deployment stroke and simplifying the hinge mechanism, thereby increasing the extension ratio and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a double tilting leaf is used to block wide passages, then the passage width is increased, but the side box width must be at least 30 cm which is very cumbersome
Solution Approach 1:
The patent introduces a second axis of rotation perpendicular to the first axis. The primary flap rotates about a first axis, and the secondary flap rotates about a second axis that is perpendicular to the first axis. This two-dimensional rotational mechanism allows the distal end of the secondary flap to extend much farther from the side box than conventional single-axis mechanisms, achieving an extension distance that is 1.58 times the side box width, thereby enabling wide passage blocking without increasing side box width.
2Length of moving object
If the extension distance of the tilting leaf is increased, then the passage coverage is improved, but the deployment mechanism becomes more complex and expensive
Solution Approach 1:
The patent combines two rotational movements into a single integrated mechanism. The primary flap and secondary flap are connected such that their rotations about perpendicular axes work together to achieve the extended reach. This merging of movements allows the distal end to extend 1.58 times the side box width while avoiding the need for complex telescopic or articulated deployment mechanisms that would otherwise be required to achieve such extension.
Solution Approach 2:
By adding rotation about a second axis perpendicular to the first axis, the mechanism achieves greater extension distance without proportionally increasing complexity. The dual-axis rotation naturally produces the extended reach as a geometric consequence rather than requiring additional complex components.
3Length of stationary object
If the side box width is reduced, then the gate efficiency and space utilization are improved, but the deployment mechanism complexity increases
Solution Approach 1:
The patent reduces side box width by utilizing dual-axis rotation of the flaps. The primary flap rotates about a first axis, and the secondary flap rotates about a second perpendicular axis, allowing the distal end to extend much farther from a more compact side box. This achieves an extension distance of 1.58 times the reduced side box width, improving space utilization while the perpendicular axis rotation simplifies the overall hinge mechanism structure.
Data Source
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AI summary
Disclosed is a lateral cabinet (20) comprising a box (30) arranged along a passage (24), at least one swing leaf (32) for blocking the passage (24), formed from a primary flap (50) and a secondary flap (52) mounted so as to be able to move relative to each other between a folded configuration in which the secondary flap (52) is nested within the primary flap (50) and an unfolded configuration in which the secondary flap (52) mainly extends out of the primary flap (50), and a hinge mechanism (34) hinging the swing leaf (32) to the box (30) comprising a primary pivot link (56) for the primary flap (50) to pivot relative to the box (30) about a primary axis (A-A') substantially parallel to the positioning surface (45) of the box (30), a secondary pivot link (58) for the secondary flap (52) to pivot relative to the box (30) about a secondary axis (B-B') substantially parallel to the primary axis (A-A') and spaced apart from the primary axis (A-A'), and a rigid part (60) hinged to the primary and secondary flaps (50, 52).