Scalpel Handle Blade Shield Pivoting Actuator Mechanism
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Solution Overview
Problem
Existing surgical scalpels lack an efficient and user-friendly mechanism for safely covering and uncovering the cutting edge, posing risks during handling and use.
Innovation Solution
A scalpel handle with a pivotally mounted blade shield that can be easily moved between a covering and an out-of-the-way position using a finger-depressible actuator mechanism, featuring a linkage assembly and torsion spring for automatic locking and unlocking, enhancing safety and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manually-operable slide assembly with gear mechanisms is used to move the safety shield, then the blade cutting edge is effectively protected, but the device complexity increases and the ease of operation deteriorates
Solution Approach 1:
The patent removes the complex gear mechanisms and slide assembly from the scalpel design, extracting only the essential function of blade protection. The safety shield is directly mounted on the handle and can be manually moved without any intermediary mechanical transmission components, thereby eliminating the complexity while maintaining the protective function.
Solution Approach 2:
Instead of using a complex mechanism to move the shield, the patent inverts the approach by allowing the shield to be directly manipulated by the operator's finger. The simple pivotal movement mechanism requires no gears or linkages, making the system less complex while achieving the same protective effect.
2Reliability
If a complex gear mechanism is interposed between the slide assembly and the safety shield, then the shield movement is controlled, but the ease of operation deteriorates and the device complexity increases
Solution Approach 1:
The patent extracts and removes all gear mechanisms and slide assemblies from the design. The safety shield is directly pivotal mounted on the handle, allowing the operator to move it between covered and exposed positions with a simple finger motion, thereby achieving ease of operation without any complex control mechanisms.
Solution Approach 2:
The safety shield is designed to be self-operable by the user's direct finger pressure on the actuator. The pivotal mounting allows the shield to move freely between positions without requiring any intermediary mechanisms, making the system self-sufficient and eliminating the need for complex control assemblies.
3Ease of operation
If the blade shield is constantly exposed, then the ease of operation is improved, but the object-affected harmful factors increase due to risk of inadvertent cuts
Solution Approach 1:
The patent implements a dynamic safety shield that can pivot between a covered position (when not in use) and an exposed position (when needed for operation). This dynamic configuration allows the blade to be protected when idle, reducing the risk of accidental cuts, while being easily accessible when required for surgical procedures.
Solution Approach 2:
The safety shield acts as an intermediary element between the blade and the external environment. When in the covered position, it mediates and prevents direct contact with the cutting edge, thereby reducing harmful factors. The shield can be easily moved to an exposed position when blade access is required, maintaining ease of operation.
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 solution provides a secure and convenient method to cover and expose the blade edge, reducing accidental cuts and improving handling safety while maintaining a simple and effective design.
Implementation Method 1
a torsion spring for automatically returning the actuator mechanism to its initial position after depression
Implementation Method 2
a first lever arm pivotally connected to the handle and to which the actuator mechanism is connected for movement with the actuator mechanism, a second lever arm pivotally connected to the handle and to the blade shield, and a linkage element connecting the first and second lever arms
Data Source
AI summary
A scalpel handle for holding a blade having a cutting edge includes a handle member and a blade shield for covering the blade cutting edge. The blade shield is connected to the handle member for pivotal movement relative thereto between a blade-covering condition and an out-of-the-way condition, and a movable shield latch mechanism is capable of releasably locking the blade shield in its blade-covering condition. A finger-operable actuator mechanism is mounted upon the handle member for movement between first and second conditions, and a spring is interposed between the actuator mechanism and the handle member. During a first phase of movement of the actuator mechanism from its first to its second condition, the shield latch mechanism unlocks the blade shield from its locked blade-covering condition, and during a second phase of movement, the blade shield is moved from its blade-covering condition to its out-of-the-way condition.