Shear Tension Device Locking Mechanism
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Solution Overview
Problem
Existing shear devices in the hair styling industry fail to maintain tension effectively under repeated stresses, leading to reduced operability over time.
Innovation Solution
A shear tension device incorporating an adjustment screw, hold down screw, and lock mechanism, which provides semi-permanent tension through a combination of screw configurations and locking systems to secure the blades, including knurled surfaces and ring configurations for enhanced retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple fastening device is used to connect the two blade members, then the device complexity is reduced, but the reliability of maintaining tension under repeated stresses deteriorates
Solution Approach 1:
The fastening device is divided into multiple functional components: an adjustment screw for tension control, a hold down screw for securing, and a lock mechanism for maintaining position. This segmentation allows each component to perform its specific function effectively, resolving the contradiction by creating a reliable system without excessive overall complexity.
Solution Approach 2:
The lock mechanism is designed to pre-secure the adjustment screw at the desired tension position before actual use. This preliminary locking action ensures that the tension setting is maintained throughout repeated stresses, preventing the reliability deterioration while keeping the device structure manageable.
2Reliability
If a multi-component fastening system is used to maintain tension, then the reliability of tension maintenance is improved, but the device complexity increases
Solution Approach 1:
Multiple fastening functions (adjustment, holding, and locking) are merged into a compact integrated assembly where the adjustment screw, hold down screw, and lock mechanism work together in a coordinated manner. This merging reduces the overall device complexity while maintaining the reliability benefits of having multiple functional components.
Solution Approach 2:
The lock mechanism is designed to automatically maintain the tension setting without requiring continuous external intervention. Once the adjustment screw is positioned, the lock engages to self-maintain the tension through repeated stresses, reducing the operational complexity while ensuring reliable tension maintenance.
3Productivity
If repeated stresses are applied to the shears during normal usage, then the productivity and usage frequency are improved, but the reliability of the fastening device deteriorates due to loosening
Solution Approach 1:
The lock mechanism pre-secures the adjustment screw at the optimal tension position before the shears undergo repeated usage stresses. This preliminary locking action prevents the fastening device from loosening during intensive use, maintaining reliability while allowing high productivity and usage frequency.
Solution Approach 2:
The hold down screw and lock mechanism apply a counteracting force in advance to prevent the loosening that would normally occur during repeated stresses. This preliminary anti-action counterbalances the loosening tendency, allowing the shears to maintain reliable fastening even under intensive usage conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively maintains tension in shears throughout repeated usage, ensuring consistent performance until servicing is required, thereby extending the tool's operational life and user comfort.
Implementation Method 1
tightening of the adjustment screw and anchor screw to the shear (sharpening-reconditioning) serves to provide semi-permanent tension to the shears
Implementation Method 2
the adjustment screw is appropriately knurled or includes other edges designed to receive a portion of the lock
Data Source
AI summary
A shear tension device comprising an adjustment screw and a lock wherein the lock is configured to engage with the adjustment screw and maintain tension properly set by the factory in the shears until service of the shears is required.