Three-Stage Pivot Mechanism for Electric Device Stability
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Solution Overview
Problem
Conventional electric devices, such as flat panel displays, face issues with adjusting viewing angles, which can result in the device tilting forward and potentially knocking users or causing instability, as they typically have only two-stage pivot mechanisms that do not adequately manage center of gravity during angle adjustments.
Innovation Solution
A three-stage pivot mechanism incorporating a first bearing shim with a limiting salient and a second bearing shim with a sliding salient, allowing the device to be adjusted using distinct forces to prevent tilting and ensure stability, featuring a first position for packaging, a second position for optimal viewing, and a third position for enhanced visibility, with forces adjusted through cantilever arm lengths and elastic members for smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-stage pivot mechanism is used, then the device can be adjusted between two positions, but the device may tilt forward and knock users or cause instability
Solution Approach 1:
The pivot mechanism is segmented into three distinct stages: a first stage for packaging position, a second stage for optimal viewing angle, and a third stage for enhanced visibility. Each stage is separated by limiting salients on the bearing shim that prevent continuous rotation, ensuring the device stabilizes at predetermined safe positions rather than tilting forward uncontrollably.
2Volume of moving object
If the display main body is positioned at the first position for packaging, then the packaged size is minimized, but the center of gravity tilts forward causing careening danger
Solution Approach 1:
The bearing shim is designed with a limiting salient that creates preliminary counter-action against forward tilting. When the display main body reaches the packaging position, the limiting salient engages to prevent further forward movement, counteracting the center of gravity tilt before it can cause careening danger.
3Reliability
If a three-stage pivot mechanism is implemented, then tilting prevention and stability are improved, but the device complexity increases
Solution Approach 1:
A bearing shim serves as an intermediary component between the display main body and the supporting crutch. This single intermediary element incorporates multiple limiting salients that enable three-stage positioning functionality, achieving enhanced stability without proportionally increasing overall device complexity.
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 three-stage pivot mechanism effectively prevents the device from tilting forward during adjustments, maintains stability, and allows for easy adjustment between positions using varying forces, enhancing user safety and operational convenience.
Implementation Method 1
an elastic member, which is deformed by the main body when the main body is pushed by external force to a position different from a predetermined position, to elastically generate a force for returning the main body to the predetermined position
Data Source
AI summary
An electric device includes a main body, a supporting crutch and a pivot mechanism connecting the body to the crutch. The body is rotated around the crutch through the pivot mechanism. The pivot mechanism includes first and second bearing shims. The first bearing shim has a limiting salient, which has a first sidewall, a second sidewall and an inclined surface. The inclined surface is tilted from the second sidewall to the first sidewall. The second bearing shim has a sliding salient. When the sliding salient is disposed on the first/second sidewall, the main body is positioned at a first/second position. The sliding salient crosses the first sidewall and slides on the inclined surface to the second sidewall by a first force. The sliding salient crosses the second sidewall and slides on the inclined surface to the first sidewall by a second force larger than the first force.