Portable Device Cover Linkage for Wide Viewing Angles
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Solution Overview
Problem
Conventional portable electronic devices with four-bar linkage mechanisms are limited in adjusting the viewing angle due to manufacturing errors and the restricted movement of the adjusting member, preventing the cover from completely covering the main body and limiting user-adjustable viewing angles.
Innovation Solution
The introduction of a guiding groove on the main body and a rotary shaft allows the cover to be pushed backwards, enabling the adjustment of a larger viewing angle by sliding and rotating the first and second brackets, providing a greater included angle between the cover and the main body, thus allowing users to choose a comfortable viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a four-bar linkage mechanism with an elastic module is used to accommodate manufacturing errors, then the cover can completely cover the main body, but the adjusting member cannot further rotate backwardly to provide adjustable viewing angles
Solution Approach 1:
The linkage mechanism is divided into two separate brackets: a first bracket connected to the cover that provides sliding movement along a guiding groove, and a second bracket connected to the main body that provides rotational movement. This segmentation allows each bracket to independently perform its function without interfering with the other, enabling both complete cover coverage and adjustable viewing angles.
2Reliability
If the adjusting member's moving range is limited to ensure stable operation, then the mechanism operates reliably, but the viewing angle cannot be adjusted beyond a fixed position
Solution Approach 1:
A guiding groove is introduced as an intermediary element between the first bracket and the main body. This groove guides the sliding movement of the first bracket while allowing sufficient travel distance for both complete cover coverage and extended viewing angle adjustment. The guiding groove ensures stable operation by constraining the movement path while providing the necessary range of motion.
3Manufacturing precision
If the support member and adjusting member lengths are precisely manufactured, then the linkage mechanism achieves the correct opening angle, but manufacturing errors prevent complete cover coverage
Solution Approach 1:
The design changes from a fixed-length adjusting member to a sliding member that travels along a guiding groove. This parameter change allows the effective length of the linkage to vary, compensating for manufacturing errors in the support member and adjusting member. The guiding groove's length and position are designed to accommodate dimensional variations while ensuring the cover can completely cover the main body.
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 allows for a more flexible and user-friendly viewing angle adjustment, enhancing user satisfaction and convenience by exposing a larger area of the main body for a full-standard user interface.
Implementation Method 1
The other end of the first bracket is slidably disposed in the guiding groove
Implementation Method 2
the cover continues to push the first bracket and the second bracket to rotate simultaneously
Data Source
AI summary
A portable electronic device includes a cover, a main body, a first bracket, a second bracket and a rotary shaft. The main body includes a top surface, a bottom surface opposite to the top surface, and a guiding groove disposed on the top surface. One end of the first bracket pivots to the cover, and the other of the first bracket is slidable in the guiding groove. One end of the second bracket pivots to the cover. The rotary shaft pivots to the other of the second bracket and the main body to allow the second bracket to rotate about an axis of rotation relative to the main body. An orthographic projection of the guiding groove on the bottom surface of the main body and an orthographic projection of the rotary shaft on the bottom surface of the main body are overlapped with each other.