Biaxial Hinge Structure for Flat Convertible Chassis Rotation
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Solution Overview
Problem
Existing hinge devices in convertible electronic apparatuses suffer from issues such as deteriorated appearance quality and rattling or damage due to improper rotation shaft timing, leading to exposure of the lower edge of the display and contact with surfaces.
Innovation Solution
A hinge device with a biaxial structure featuring a first and second shaft, supported by a hinge chassis, and a rotation shaft selection mechanism that selectively allows rotation of one shaft between 0 to 100 degrees and the other between 100 to 280 degrees, ensuring the lower edge of the display is hidden and preventing contact with surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotation shaft on the second chassis side rotates from 0 to 180 degrees and the rotation shaft on the first chassis side rotates from 180 to 360 degrees, then the shafts smoothly rotate within the angle between chassis from 0 to 360 degrees, but the lower edge portion of the second chassis is positioned above the first chassis at about 120 degrees, causing the lower bezel of the display to be large and exposed, deteriorating appearance quality
Solution Approach 1:
The patent applies dynamics by making the rotation shaft selection changeable based on the rotation angle. The selection mechanism dynamically switches which shaft rotates (first shaft from 0-100°, second shaft from 100-280°) depending on the current angle, allowing the system to adapt its rotation behavior to maintain the lower edge of the second chassis below the first chassis throughout the rotation range, thus improving appearance quality while preserving smooth rotation capability
2Shape
If the rotation shaft on the first chassis side rotates from 0 to 180 degrees and the rotation shaft on the second chassis side rotates from 180 to 360 degrees, then the lower edge portion of the second chassis is disposed below the first chassis at an angle greater than 90 degrees, but the lower edge portion of the second chassis comes into contact with a desk surface, causing rattling and damage
Solution Approach 1:
The patent uses dynamics by implementing a changeable rotation shaft selection mechanism that switches between first shaft rotation (0-100°) and second shaft rotation (100-280°) based on the rotation angle. This dynamic switching ensures the lower edge of the second chassis remains below the first chassis at angles greater than 90 degrees, preventing contact with desk surfaces and eliminating rattling and damage risks while maintaining improved appearance quality
3Shape
If the rotation shaft on the first chassis side rotates from 0 to 180 degrees and the rotation shaft on the second chassis side rotates from 180 to 360 degrees, then the lower edge portion of the second chassis is disposed below the first chassis, but the first chassis having the keyboard will lift up, and the two chassis will not be disposed flat when viewed from the side at a position of 180 degrees
Solution Approach 1:
The patent applies dynamics through a changeable rotation shaft selection mechanism that switches between rotating the first shaft (0-100°) and the second shaft (100-280°) based on the rotation angle. This dynamic control ensures that at 180 degrees, the first chassis remains stable and flat on the desk surface without lifting up, while still maintaining the lower edge of the second chassis below the first chassis, thus resolving the contradiction between appearance quality and positional stability
Data Source
AI summary
An electronic apparatus includes a first chassis, a second chassis, and a hinge device that connects the first chassis and the second chassis. The hinge device includes a first shaft fixed relative to the first chassis, a second shaft fixed relative to the second chassis, a support member configured to support the first shaft and the second shaft so as to be rotatable relative to each other with axial directions parallel to each other, a first slider having a first end portion facing a first shaft side and a second end portion facing a second shaft side and configured to be slidable between the first shaft and the second shaft, and a second slider having a first end portion facing the first shaft side and a second end portion facing the second shaft side and configured to be slidable between the first shaft and the second shaft.