Dual-Axis Tablet Arm Mechanism to Eliminate Pinch Points
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Solution Overview
Problem
Storable writing surfaces secured to furniture often have pinch points that pose a risk of injury to children, leading to their underutilization in early school years.
Innovation Solution
A dual-axis rotation mechanism for a tablet arm that allows elevational adjustment of the tablet top surface, eliminating pinch points by using rotor blocks with specific widths and shapes to prevent finger entrapment, and incorporating rotation limiters to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional storable writing surfaces are used, then the mechanism can be compact and storable, but it creates pinch points that injure children
Solution Approach 1:
The mechanism is divided into separate rotor blocks (first rotor block and second rotor block) that rotate independently on different axes. This segmentation eliminates pinch points by separating the rotation functions and reducing interlocking moving parts that could trap fingers.
Solution Approach 2:
A channel is introduced as an intermediary structure between the rotor blocks and the outer housing. This channel provides a safe pathway for finger insertion during rotation without creating pinch points, acting as a mediator that protects children while allowing mechanism operation.
2Adaptability or versatility
If a simple rotation mechanism is used, then the structure is simple, but it cannot adjust elevational alignment of the tablet top surface
Solution Approach 1:
The dual-axis rotation mechanism serves multiple functions: it enables the tablet top surface to rotate from vertical storage position to horizontal writing position, and simultaneously allows elevational alignment adjustment. This multi-functionality achieves adaptability without proportionally increasing complexity.
Solution Approach 2:
The mechanism adds a second axis of rotation perpendicular to the first. The first axis enables horizontal rotation, while the second axis enables elevational adjustment. By operating in multiple dimensions, the mechanism achieves versatile positioning capability.
3Object-affected harmful factors
If rotor blocks are made wider to eliminate pinch points, then safety improves, but the mechanism size increases
Solution Approach 1:
The rotor blocks have non-uniform width distribution - wider at the edges where pinch points would occur and narrower at the center. This local quality variation provides safety at critical locations while minimizing overall volume increase.
Solution Approach 2:
The second rotor block is positioned within the space defined by the first rotor block's rotation path. This nesting arrangement allows both rotor blocks to coexist in a compact configuration, preventing finger entrapment while minimizing the overall mechanism volume.
Data Source
AI summary
Disclosed is a dual axis of rotation tablet arm storage mechanism. The mechanism includes a first rotor block rotationally secured to a second rotor block. Both rotor blocks travel within a dual walled track of the mechanism. In the use configuration, the walls of the track are adjacent to the second rotor and restrict the rotation of the second rotor to help stabilize the writing surface. While the disclosed tablet arm maintains the benefits of other tablet arm mechanisms, many other benefits are achieved such as a mechanism that is free of pinch points during operation. The disclosed mechanism includes a dual access rotation mechanism that also allows the elevational alignment of the tablet top surface to be adjusted while the table top is in use.