Rotatable Arm Clamping Mechanism for Medical Device Orientation
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Solution Overview
Problem
Medical devices and instruments often require attachment to either vertically oriented IV poles or horizontally oriented hospital bed rails or wheelchair bars, but existing clamp structures are not easily adaptable between these orientations, leading to insecurity and difficulty in switching between vertical and horizontal attachments.
Innovation Solution
A clamping mechanism with a telescoping assembly and rotatable arm that can be positioned for either vertical or horizontal attachment, using spring tension and cammed surfaces for secure closure, indicated by a locking mechanism, allowing easy switching between orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a clamp structure is designed for vertical attachment to IV poles, then it provides secure vertical attachment, but it cannot be easily adapted for horizontal attachment to bed rails or wheelchair bars
Solution Approach 1:
The clamp incorporates a rotatable arm that can be dynamically repositioned between vertical and horizontal orientations. The arm rotates about a pivot point, allowing the clamp to adapt its orientation to match either vertical IV poles or horizontal bed rails, thereby resolving the contradiction between adaptability and structural simplicity
Solution Approach 2:
The clamp is designed as a universal attachment device that can securely fasten to both vertical and horizontal support structures. By integrating the rotatable arm mechanism, a single clamp structure performs multiple functions (vertical and horizontal attachment) without requiring separate specialized clamps for each orientation
2Adaptability or versatility
If a clamp structure is designed for horizontal attachment to bed rails, then it provides secure horizontal attachment, but it cannot be easily adapted for vertical attachment to IV poles
Solution Approach 1:
The rotatable arm enables dynamic reconfiguration of the clamp from a horizontal configuration (suitable for bed rails) to a vertical configuration (suitable for IV poles). This single dynamic adjustment mechanism replaces what would otherwise require two entirely different clamp designs
Solution Approach 2:
The clamp is segmented into distinct functional components: a fixed mounting portion attached to the medical device, and a rotatable arm portion that can independently rotate to achieve the required orientation. This segmentation allows the arm to adapt to different orientations while the mounting portion remains simple and secure
3Reliability
If the clamp uses spring tension for closure, then it provides automatic securing force, but it may not provide sufficient tightening for secure attachment
Solution Approach 1:
The clamp merges two closure mechanisms: a spring-loaded automatic closure that provides initial securing force, and a manual cam-actuated tightening mechanism that provides additional tightening force. The spring mechanism automatically engages and holds the clamp, while the cam mechanism can be manually activated to tighten the clamp further against the support structure for enhanced security
Solution Approach 2:
The cam mechanism replaces a simple friction-based or screw-based tightening system with a mechanical advantage system. The cam's inclined surface converts small rotational movements into large linear forces, providing powerful tightening action with minimal user effort, thereby maintaining ease of operation while significantly improving attachment security
4Reliability
If the clamp provides no indication of secure state, then it simplifies the structure, but it makes it difficult to verify proper attachment
Solution Approach 1:
The clamp incorporates a visual indicator (such as a color-coded flag or indexed scale) that changes appearance or position to indicate the secure state. When the clamp is properly tightened, the indicator displays a specific color or position (e.g., green flag in the locked position, or aligned indices), providing immediate visual confirmation of secure attachment without adding complex mechanical verification systems
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
Enables secure attachment of medical instruments to various support structures, ensuring they remain in place without dislodging, regardless of orientation, and provides a clear indication of the secure state through a locking mechanism.
Implementation Method 1
The mechanism includes a generally longitudinal, telescoping assembly that extends outward from the back of the medical instrument and positions a rotatable arm to serve as a clamp opposing the back of the medical instrument or device. The mechanism assembly includes a cylindrical shaft that extends outward (against the tension force of a spring) from a housing of the medical instrument.
Implementation Method 2
Cammed surfaces within internal rotating components of the clamping mechanism assembly allow for tightening of the clamp against the support structure after closure of the clamp under the influence of the tensioning spring.
Data Source
AI summary
A hanging apparatus is provided that facilitates the attachment of a medical instrument to a support structure. The mechanism includes a generally longitudinal, telescoping assembly that extends outward from the back of the medical instrument and positions a rotatable arm to serve as one face of a clamp, opposing the back of the medical instrument as the second face of the clamp. The mechanism assembly includes a cylindrical shaft that extends outward against the tension force of a spring from a housing component of the assembly. A cam mechanism within the hanging apparatus allows for locking and tightening of the clamp against the support structure after closure of the clamp under the influence of the tensioning spring.