Microtome Knife Holder With Adjustable Eccentric Clamping
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Solution Overview
Problem
Existing knife holders for microtomes with vibrating knives require multiple adapters for different blades, leading to misadjustment and increased risk of injury during changes, especially when handling thin razor blades that need to be broken for mounting.
Innovation Solution
A knife holder with a support element and a movable clamping element, adjustable in distance from 0.1 to 1.5 mm, using an eccentric mechanism to securely clamp knives of varying thicknesses, minimizing the need for adapter changes and reducing handling risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple adapters are used for different blades, then different blade types can be accommodated, but device complexity and risk of misadjustment increase
Solution Approach 1:
The knife holder is designed with a universal clamping mechanism that can accommodate multiple blade types (razor blades, sapphire knives, disposable blades) through a single device. The adjustable support surface and clamping element can adapt to different blade thicknesses (0.1mm to 1.2mm) without requiring separate adapters, making one holder perform the function of multiple specialized adapters.
Solution Approach 2:
The knife holder incorporates adjustable and movable components including a support surface that can be positioned at different distances and a clamping element that can be moved relative to the support element. This dynamic adjustability allows the same holder to securely retain different blade types by changing the configuration rather than replacing the entire holder with type-specific adapters.
2Reliability
If knife holder is changed for different blades, then proper retention is achieved, but time loss and operational disruption increase
Solution Approach 1:
By designing a single knife holder that can accommodate multiple blade types through adjustment rather than replacement, the system eliminates the time-consuming process of changing entire knife holder assemblies. The universal design allows operators to retain the same holder while simply adjusting components to suit different blade types, significantly reducing exchange time.
Solution Approach 2:
The knife holder is pre-configured with adjustable components that can be quickly modified to accommodate different blade types. The support surface and clamping element can be preliminarily positioned to match expected blade dimensions, allowing for rapid adaptation when changing blade types without requiring complete disassembly or replacement of the holder assembly.
3Reliability
If clamping system extends close to cutting edge, then thin razor blades are stabilized, but risk of injury increases during handling
Solution Approach 1:
The clamping element acts as an intermediary between the operator and the thin razor blade. By providing a controlled clamping mechanism that secures the blade at the appropriate position, the system mediates the handling process to stabilize the blade during operation while minimizing direct manual manipulation that could cause injury. The eccentric mechanism provides controlled engagement and disengagement of the clamping action.
Solution Approach 2:
The manual handling and stabilization of thin razor blades is replaced by an automated eccentric clamping mechanism. Instead of relying on manual positioning and holding of fragile thin blades, the mechanical eccentric system automatically engages and secures the blade in the correct position, reducing the need for direct operator contact with the cutting edge and thereby minimizing injury risk.
4Adaptability or versatility
If razor blade is broken for mounting, then it can be retained in holder, but handling complexity and injury risk increase
Solution Approach 1:
The knife holder is designed to accept both complete razor blades and broken razor blade segments through the same clamping mechanism. The adjustable support surface and clamping element can accommodate different blade configurations without requiring different mounting procedures or specialized adapters, making the holder versatile enough to handle various blade states uniformly.
Solution Approach 2:
The knife holder allows for parameter adjustments in the clamping mechanism to accommodate different blade configurations. By changing the position of the support surface and the clamping force applied by the movable clamping element, the system can securely retain both complete and broken razor blades without requiring physical modification of the blades themselves, simplifying the installation process.
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 easy exchange and secure retention of knives of different types, reducing the risk of injury and misadjustment by accommodating various blade thicknesses within a single holder.
Implementation Method 1
An eccentric is provided which moves the clamping element along the support element and presses the clamping surface against the support surface, thus clamping the knife.
Data Source
AI summary
A knife holder for a microtome having a vibrating knife comprises a support element and a clamping element movable relative to the support element. The support element is embodied with a support surface for the knife, and the clamping element is embodied with a clamping surface. For clamping the knife, the support surface and clamping surface are settable at a distance of 0.1 to 1.5 from one another.