Dialysis Machine Cover Hinge for Easy Removal and Secure Retention
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Solution Overview
Problem
Existing medical appliances for extracorporeal blood treatment, such as dialysis machines, have complex designs that make it difficult to remove and install the cover components, necessitating improved simplicity and ease of use.
Innovation Solution
The pivot bearing arrangement incorporates bearing elements and receptacles that allow for limited linear movement along the pivot axis, coupled with a spring arrangement for resilient mounting, enabling easy cover removal and installation by lateral linear movement, and includes support and holding mechanisms to prevent inadvertent disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is mounted using a conventional pivot bearing arrangement with hinge pins and blind bores, then the cover is securely fastened to the housing component, but the removal and installation of the cover becomes complex and time-consuming
Solution Approach 1:
The pivot bearing arrangement is segmented into multiple pivot bearings arranged spaced apart along the pivot axis, with each pivot bearing having a bearing element and bearing element receptacle. This segmentation allows the cover to be moved in discrete steps during removal and installation, simplifying the operation while maintaining secure engagement
Solution Approach 2:
The bearing elements are designed to be linearly movable to a limited extent along the pivot axis relative to the bearing element receptacles. This dynamic capability enables the cover to transition between a removal position (where bearing elements disengage from receptacles) and a bearing position (where they are engaged), allowing easy removal and installation while maintaining operational security
2Ease of operation
If the bearing elements are allowed to move freely along the pivot axis, then the cover can be easily removed and installed, but the bearing elements may become inadvertently disengaged during normal pivoting operations
Solution Approach 1:
A spring arrangement is introduced that applies a preliminary counteracting force to prevent the bearing elements from disengaging during normal operation. The spring arrangement resiliently mounts the cover along the pivot axis and elastically pretensions the cover in the direction of the bearing position, creating a preliminary anti-action that counterbalances any forces that might cause inadvertent disengagement
Solution Approach 2:
The spring arrangement acts as a cushioning mechanism that absorbs and compensates for forces during pivoting movements. By pretensioning the cover in the direction of the bearing position, the spring arrangement provides a safety margin that prevents the bearing elements from accidentally disengaging from the receptacles during normal operation
3Reliability
If the cover is resiliently mounted with spring pretensioning, then the bearing elements remain securely engaged during operation, but the removal and installation process becomes more complex
Solution Approach 1:
The spring arrangement is merged with the pivot bearing arrangement, with the spring elements integrated into the structure of the pivot bearings or the cover itself. This combining of functions reduces the overall number of separate components and simplifies the device while maintaining the security of bearing element engagement through elastic pretensioning
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 design simplifies cover removal and installation, enhances safety, and reduces the risk of accidental disengagement, while maintaining structural integrity and operational reliability.
Implementation Method 1
a spring arrangement is provided by means of which the cover is mounted resiliently along the pivot axis and is elastically pretensioned relative to the housing component in the direction of the bearing position
Data Source
AI summary
A medical appliance for use in extracorporeal blood treatment. The appliance includes a housing component, a cover and a pivot bearing arrangement by which the cover is mounted on the housing component. The cover is pivotable between a covering position, in which the housing component is covered, and a exposure position, in which the housing component is exposed. The pivot bearing arrangement has pivot bearings, each having a bearing element and a bearing element receptacle. The cover can move linearly relative to the housing component between a dismounting position, in which at least one of the bearing elements is disengaged from a bearing element receptacle, and a bearing position, in which both bearing elements engage the bearing element receptacles. The cover is mounted resiliently and elastically preloaded relative to the housing component by a spring arrangement.