Ambidextrous Pivot-Tab Switch Mechanism for Electrosurgical Instruments
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Solution Overview
Problem
Existing electrosurgical instruments often require separate switches for left- and right-handed operators, limiting ambidextrous operation.
Innovation Solution
An electronic switch mechanism with two or more pivotally attached tabs, allowing a medical practitioner to actuate the instrument with either hand by rotating the tabs to contact a switch element, which controls the activation of an energy source for electrosurgical instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate switches are provided for left- and right-handed operators, then each operator can have a dedicated switch position, but the device complexity increases and ambidextrous operation is not achieved
Solution Approach 1:
The patent combines two separate switch functions into a single switch mechanism with two tabs. The first tab corresponds to a first switch and the second tab corresponds to a second switch, but both are integrated into one housing structure. This merging allows ambidextrous operation (improving ease of operation) while reducing the total number of separate switch components (reducing device complexity).
Solution Approach 2:
The single housing structure serves multiple functions: it contains both the first and second switches, provides mounting for both tabs, and offers a unified operational interface for both left-handed and right-handed operators. This multi-functionality achieves ambidextrous operation without proportionally increasing device complexity.
2Adaptability or versatility
If multiple tabs are pivotally attached to opposite lateral edges, then ambidextrous operation is enabled, but the structural complexity of the switch mechanism increases
Solution Approach 1:
The switch mechanism is segmented into distinct functional components: a housing, a first tab pivotally attached to a first lateral edge, and a second tab pivotally attached to a second lateral edge. Each tab independently corresponds to a separate switch. This segmentation enables ambidextrous operation while keeping the structural complexity manageable through modular design.
3Reliability
If tabs are constrained to rotational movement only, then the switching action is reliable, but the range of motion and ease of actuation are limited
Solution Approach 1:
The tabs are designed with dynamic movement characteristics: they are pivotally attached to allow rotational movement about a pivot point, and the constraint to rotational movement ensures reliable switching action. The pivotal attachment provides a natural arc of motion that is easy to actuate while maintaining consistent contact with the switch elements for reliable 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
Enables ambidextrous operation of electrosurgical instruments by allowing either hand to activate the device, improving usability and versatility.
Implementation Method 1
The tabs are constrained to rotational movement relative to the housing so that contact with the first tab or the second tab causes the respective tab to rotate to actuate the switch element
Implementation Method 2
a rigid rocker pivotally constrained on the housing at a pivot point located between the first tab and the second tab. The tabs are constrained to rotational movement relative to the housing so that pressing the first tab or the second tab causes the respective tab to rotate and contact the rigid rocker which in turn contacts and actuates the dome switch
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~4A
AI summary
A switch mechanism includes a housing with a fenestration, a switch element held in the housing, and a first tab and a second tab each being pivotally attached to an opposite lateral edge of the fenestration. The tabs are constrained to rotational movement relative to the housing so that contact with the first tab or the second tab causes the respective tab to rotate to actuate the switch element.