Monitor Support Pivot Washer Structure to Prevent Screw Loosening
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Solution Overview
Problem
Existing supporting devices for monitors, which use a multi-sectional structure with pivotally connected supports fastened by screws, face issues where the screw loosens due to frictional forces during angle adjustments, leading to a reduction in fastening effectiveness.
Innovation Solution
A supporting device that incorporates a fixed washer and a threaded fastener with a first and second engaging structure, where the washer is aligned with a through hole on the second support, preventing the threaded fastener from rotating with the second support, thus maintaining the fixation relative to the rotation axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw is used to fasten pivotally connected supports, then the supports can be fixed at adjusted angles, but the screw will loosen due to frictional forces during rotation
Solution Approach 1:
A washer is introduced as an intermediary component between the screw and the support. The washer includes a non-circular opening that engages with a corresponding non-circular protrusion on the support, preventing the washer from rotating when the support rotates. This intermediary structure protects the screw from rotational loosening while still allowing adjustable fastening of the supports at various angles.
2Ease of operation
If the screw uses frictional force to fix the supports, then the supports can be adjusted, but the rotating support loosens the screw
Solution Approach 1:
The washer serves as a mediator that decouples the rotational movement of the support from the screw. The non-circular opening in the washer engages with the non-circular protrusion, creating a ratchet-like mechanism that allows the support to rotate for adjustment but prevents the screw from rotating during use, thereby maintaining fastening effectiveness.
Solution Approach 2:
The washer is pre-installed on the support with its non-circular opening engaged with the non-circular protrusion before the screw is tightened. This preliminary engagement ensures that when the screw is tightened, the washer is already positioned to prevent rotational loosening, maintaining both adjustability and fastening reliability.
Data Source
AI summary
A supporting device includes a first and a second support, a fixed washer, and a threaded fastener. The first support has a threaded structure extending along a rotation axis, and a first engaging structure. The second support is pivotally connected to the first support relative to the rotation axis and has a through hole aligning with the threaded structure. The fixed washer includes a washer portion and a second engaging structure. The washer portion is disposed on the second support and aligns with the through hole. The second engaging structure passes through the through hole to engage with the first engaging structure. The threaded fastener presses against the washer portion and passes through the washer portion and the through hole to engage with the threaded structure. When the second support and the first support rotate relatively, the fixed washer and the first support remain fixed relative to the rotation axis.