Adjustable Hinge Assembly for Consistent Rotation Torque
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Solution Overview
Problem
Existing hinge assemblies in computing devices fail to provide consistent resistance to rotation over the lifespan of the device, leading to unpredictable torque values that can change with usage and handling, affecting the device's orientation and performance.
Innovation Solution
The implementation of an adjustable closed-loop friction band that secures to the hinge shafts, using an elongate element bent back upon itself with a removable torque control element to maintain a consistent gap and friction, ensuring consistent torque values by adjusting the thickness of the torque control element to meet design tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hinge assemblies are used, then the device can rotate freely, but the resistance to rotation is inconsistent and changes with usage and handling
Solution Approach 1:
The hinge assembly incorporates an adjustable friction band that can be tuned to provide consistent resistance to rotation. The friction band applies a controlled frictional force between the hinge shaft and the band, creating a predictable torque that remains stable throughout the device's lifespan. This dynamic friction mechanism allows the hinge to maintain reliable rotational resistance despite repeated use and handling.
2Reliability
If friction band tension is increased to provide consistent torque, then resistance to rotation improves, but the device becomes harder to adjust and modify
Solution Approach 1:
The friction band is designed as a segmented or modular component that can be independently adjusted, tightened, or replaced. The band may include adjustment mechanisms such as threaded fasteners, cam locks, or spring-loaded tensioners that allow the friction tension to be modified without disassembling the entire hinge assembly. This segmentation enables maintenance and adjustment of torque consistency while preserving ease of repair.
3Ease of manufacture
If the hinge assembly is simplified, then manufacturing becomes easier, but the ability to maintain consistent torque over lifespan is reduced
Solution Approach 1:
The hinge assembly incorporates adjustable parameters such as friction band tension, band material properties, or contact surface characteristics that can be tuned during manufacturing or field adjustment. By changing these parameters, the assembly can achieve consistent torque values within specified tolerances. The design allows for parameter adjustment without requiring complex manufacturing processes, balancing ease of manufacture with torque precision.
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
This solution provides a consistent resistance to rotation, maintaining desired torque values throughout the device's lifespan, ensuring the device maintains user-selected orientations and preventing torque changes due to handling or impact, thereby enhancing device stability and performance.
Implementation Method 1
controls friction between the aperture and the hinge shaft
Data Source
AI summary
The description relates to hinged devices, such as hinged computing devices. One example can include a hinge assembly that rotatably secures a first portion and a second portion. The hinge assembly can define a hinge shaft. The hinge assembly can include an adjustable closed-loop friction band secured to the first portion. The adjustable closed-loop friction band can extend between an aperture end and a removable end. The removable end can include a removable torque control element having a thickness that also at least in part controls a dimension of an aperture that receives the hinge shaft and thereby controls friction between the aperture and the hinge shaft.