Biaxial Hinge With Adjustable Axis Distance

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Solution Overview

Problem

Conventional biaxial hinges for terminal devices, such as notebook PCs and mobile phones, are not compatible with varying thicknesses, making them unsuitable for thinner devices and complicating manufacturing due to fixed hinge axis distances.

Innovation Solution

A biaxial hinge system comprising four shafts with adjustable axis distances, utilizing radial and axial coupling mechanisms and rotation controlling means, allowing the hinge shafts to maintain parallelism and adjustability, enabling compatibility with devices of different thicknesses without modifying the hinge structure or function.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional biaxial hinge with fixed hinge shafts is used, then the rotation of the first hinge shaft and the second hinge shaft can be controlled, but the distance between the two axes cannot be adjusted

Engineering Contradiction:

Improveadjustability of distance between hinge axesVSAvoidstructure of hinge shaft coupling

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The hinge shaft coupling structure is transformed from a fixed configuration to a dynamic, adjustable one. The first and second hinge shafts are made movable relative to each other along the radial direction while maintaining parallelism, allowing the distance between axes to be adjusted according to different terminal device thicknesses.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The coupling structure is divided into separable components including the first hinge shaft, second hinge shaft, and coupling members. This segmentation allows independent adjustment of the distance between hinge axes while maintaining the functional integrity of the rotation controlling means.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If a biaxial hinge with fixed axis distance is used, then the hinge structure is simple, but it is not compatible with thinner terminal devices

Engineering Contradiction:

Improvecompatibility with varying device thicknessVSAvoidoperation smoothness

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The hinge shafts are designed to be dynamically adjustable in position along the radial direction, enabling the same hinge structure to adapt to different terminal device thicknesses. This dynamic adjustment capability ensures compatibility with both traditional and thinner devices while maintaining smooth operation.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If biaxial hinges are manufactured with varying thickness for different terminal devices, then compatibility is achieved, but the manufacturing process becomes extremely complicated

Engineering Contradiction:

Improvecompatibility with different device specificationsVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

A universal hinge shaft coupling structure is designed that can accommodate multiple terminal device specifications through adjustment rather than manufacturing different versions. The coupling members enable the same hinge assembly to be adapted to various thickness requirements, simplifying the manufacturing process while maintaining broad compatibility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9921613B2Biaxial hinge and terminal device using the same

Publication Date: 2018.03.20 KEM HONGKONG LTD

AI summary

A biaxial hinge has a first hinge portion which includes a first A hinge shaft, a second A hinge shaft, and a first radial direction coupling unit for coupling the first A hinge shaft and the second A hinge shaft. The biaxial hinge also has a second hinge portion which includes a first B hinge shaft and a second B hinge shaft, and a second radial direction coupling unit for coupling the first B hinge shaft and the second B hinge shaft. The biaxial hinge also has an axial direction coupling unit.