Pin Locking Dual Shaft Hinge Noise Reduction
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Solution Overview
Problem
Existing dual shaft hinges in electronic devices face challenges with reduced dimensions, leading to poor locking efficiency and noise due to fixed pulley curvature, making them inconvenient for use in small electronic products.
Innovation Solution
A pin locking dual shaft hinge design featuring a connecting support with a penetrated hole and an insertion pin with cut surfaces, allowing for adjustable dimensions and reduced noise through precise engagement of cams, replacing the traditional pulley with an insertion pin for enhanced stability and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pulley dimension is reduced to fit smaller electronic devices, then the hinge occupies less space, but the contact surface between the pulley and the concave part of the engaging cams becomes loose, affecting locking effect and causing noise
Solution Approach 1:
The patent extracts the pulley component from the hinge system and replaces it with an insertion pin mechanism. This removal of the problematic pulley element eliminates the noise and locking effect issues while maintaining the space-saving design for small electronic devices.
Solution Approach 2:
The patent changes the geometric parameters of the engaging cams, specifically modifying the concave parts to have optimized curvature radii that match the insertion pin dimensions. This parameter optimization ensures tight contact and effective locking without requiring a pulley, thus solving both the space constraint and reliability issues.
2Adaptability or versatility
If the pulley dimension is adjusted, then the hinge can be resized, but the contact surface between the pulley and engaging cams becomes uneasy to be tightly adjacent, causing noise during movement
Solution Approach 1:
The patent removes the noise-generating pulley component entirely and replaces it with an insertion pin system that inherently provides quiet operation through its sliding engagement mechanism with the engaging cams, while preserving design flexibility for various device sizes.
Solution Approach 2:
The patent employs simple, easily manufacturable components like the insertion pin and engaging cams that can be quickly produced and replaced if needed, providing a cost-effective and quiet solution that doesn't require complex pulley mechanisms.
3Volume of moving object
If the pulley is adjusted in dimension, then the hinge components can be resized, but two ends of the pulley are respectively inserted in a slide hole of the first and the second connection sheet, causing the connection sheets to be altered, thereby being inconvenience in use
Solution Approach 1:
The patent extracts the problematic pulley insertion mechanism and replaces it with a simplified system where the insertion pin engages with the engaging cams through a single penetrated hole in the connecting support, eliminating the issue of altering multiple connection sheets and improving ease of operation.
Data Source
AI summary
The present invention relates to a pin locking dual shaft hinge, including a connecting support, a first core shaft and a second core shaft parallel to each other, a first engaging cam, a second engaging cam and an insertion pin. The connecting support includes a main body and a first connecting member disposed between an upper and a lower end thereof, the first connecting member is penetrated with a penetrated hole. The first core shaft and the second core shaft are respectively pivoted at the upper and lower end of the main body. The first engaging cam is sleeved and engaged on the first core shaft, the periphery of the first engaging cam is formed with at least a first engaging part. The second engaging cam is sleeved and engaged on the second core shaft, the periphery of second engaging cam is formed with at least a second engaging part.