Vein Occluding Device Axle Socket Design
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Solution Overview
Problem
Existing venous tourniquets face issues with the visible pivot pin shifting, leading to potential skin injury and bacterial accumulation, compromising hygiene and handling efficiency.
Innovation Solution
The integration of axially movable, spring-loaded axle sockets within the lock housing, which are recessed and not visible externally, ensuring secure mounting and easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a visible axle pin is used for pivotable mounting of the clamping lever, then the device structure is simple and easy to manufacture, but the axle pin shifts position causing skin injury risk and bacterial accumulation
Solution Approach 1:
The invention extracts the harmful visible axle pin from the external view and relocates the pivot mounting function entirely within the lock housing. The clamping lever is now pivotably mounted on internal side walls of the housing, completely eliminating the external axle pin that caused skin injury and bacterial accumulation risks.
Solution Approach 2:
The pivot mounting mechanism is nested within the lock housing structure. The clamping lever rotates about a pivot axis that is contained entirely within the housing, with the lever nested between the side walls. This nesting eliminates external protruding components while maintaining the rotational function.
2Ease of operation
If the pivot pin is made visible and accessible, then assembly and maintenance is easier, but hygiene conditions deteriorate due to bacterial accumulation in recesses
Solution Approach 1:
The harmful external axle pin and its associated recesses are extracted from the visible exterior. All pivot mounting components are relocated to the internal structure of the lock housing, eliminating external recesses where bacteria could accumulate while maintaining functional accessibility through the strap mechanism.
Solution Approach 2:
The smooth outer shell of the lock housing acts as a hygienic barrier, enclosing all mechanical components including the pivot mounting. This continuous outer surface prevents bacterial accumulation while the flexible strap mechanism provides the necessary operational accessibility for assembly and maintenance.
3Reliability
If axle sockets are embossed in recesses and spring-loaded, then secure mounting and hygiene are improved, but device complexity increases
Solution Approach 1:
The invention merges multiple functions into the spring-loaded axle socket: the socket provides both the pivot mounting function and the securing function through spring pressure. The embossed recess in the side wall combines the structural support and the hygienic smooth surface, eliminating the need for separate external fastening elements.
Solution Approach 2:
The spring-loaded axle socket is designed to self-secure the clamping lever in the pivot position through spring pressure. The mechanism automatically maintains secure mounting without requiring additional fastening operations, while the smooth embossed surface self-resists bacterial accumulation.
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
This design enhances user safety by eliminating visible components that can cause injury and reduces bacterial accumulation, improving hygiene and handling ease.
Implementation Method 1
axle sockets for the clamping lever firmly integrated into the lock housing engage in recesses, advantageously round blind holes, subsequently embossed in the housing
Implementation Method 2
The axle or the axle sockets for mounting the clamping lever are designed to protrude on the sides and be spring-loaded or displaceable for the purpose of assembly in the lock housing
Data Source
Figure 1~3c
Figure 4~9
AI summary
The device has a clamping lever (3) provided for a band guided through a clasp housing and rotatably supported in the clasp housing around a rotational axis (4) between side walls (2a, 2b) of the housing. The housing has recesses (13, 14) as an axial retainer, and the clamping lever has axial connections (11, 12) that are supported in the rotational axis in an axially movable manner, where the connections are engaged into the recesses under spring force and are formed as a single piece with the clamping lever.