Ligature resistant roll holder assembly
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Solution Overview
Problem
Conventional roll holder assemblies lack effective measures to prevent ligatures or unauthorized removal, posing a continuous need for improvement in securing rolled products within a wall structure.
Innovation Solution
A ligature-resistant roll holder assembly is designed with a housing, retainer, support housing, button, and biasing member, featuring a unique configuration that includes a frustoconical outer surface and annular void, allowing the button to angulate and prevent unauthorized access or removal of the rolled product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional roll holder assemblies are used, then basic roll holding function is provided, but ligature resistance and security against unauthorized removal are insufficient
Solution Approach 1:
The roll holder assembly is divided into multiple functional segments: a housing unit, a retainer mechanism with lateral support assembly, and a button actuation system. Each segment performs a specific security function, collectively providing ligature resistance while maintaining manageable complexity through modular design
Solution Approach 2:
The retainer is disposed within the lateral aperture of the housing, and the lateral support assembly is nested within the housing structure. The button is disposed within passages of both the retainer and support housing. This nested configuration provides multiple layers of security without requiring a completely separate external mechanism for each function
2Ease of operation
If the button is allowed to move freely, then ease of operation is improved, but security against unauthorized access deteriorates
Solution Approach 1:
The button is designed to be movable within its passage, allowing it to be pushed or pulled to release the roll. However, the button's movement is constrained by the frustoconical outer surface and annular void geometry, which ensures the button can only be aligned with the product core when properly assembled, providing security while maintaining operational accessibility
Solution Approach 2:
The frustoconical outer surface creates a geometric constraint that changes the positional parameters of the button. The conical geometry ensures that the button can only occupy specific aligned positions when the assembly is properly configured, preventing unauthorized access while allowing legitimate operation
3Stability of the object's composition
If the retainer is fixed rigidly, then structural stability is improved, but ability to accommodate button movement and angulation deteriorates
Solution Approach 1:
The retainer is designed with an inner passage that allows the button to move and angulate within it. The lateral support assembly provides structural stability to the retainer while the passage geometry accommodates the dynamic movement of the button, enabling the button to align with the product core when properly assembled
4Ease of manufacture
If the housing is designed with simple geometry, then manufacturing ease is improved, but ligature resistance and security features deteriorate
Solution Approach 1:
The housing is designed with a lateral aperture and medial aperture that segment the structure into distinct functional zones. The lateral support assembly is integrated into the lateral wall structure, and the rim extends from the lateral and medial walls. This segmented design provides ligature resistance through the aperture configuration while maintaining relatively simple manufacturing processes
Solution Approach 2:
The frustoconical outer surface of the button and the annular void create an asymmetric geometric constraint that provides security features. The asymmetric geometry prevents ligature formation and unauthorized access while being manufacturable through standard forming processes
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 assembly effectively secures rolled products by preventing ligatures and ensuring the button can only be aligned with the product's core when properly assembled, enhancing security and stability within a wall structure.
Implementation Method 1
The biasing member may include a proximal end and a distal end. The proximal end of the biasing member may engage the support housing. The distal end of the biasing member may engage the button.
Data Source
AI summary
A ligature resistant holder for a roll of material that is to be disposed within a wall. The holder includes a housing of which at least one side walls has an aperture with which a support assembly is associated. The support assembly includes a support member, a biasing member, a retainer and a support housing. The retainer extends through the aperture and includes portions defining a passage through the retainer. At least partially disposed within the passage of the retainer is the support member. The support member includes an actuation portion, which extends into the chamber, and a stop portion that extends radially relative to the actuation portion and engages the retainer such that axial movement of the button through the passage is limited. The biasing member is at least partially disposed within the support housing and biases the support member for movement within the chamber.