Ergonomic Speculum with Obtuse Handle Angle and One-Handed Locking
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Solution Overview
Problem
Traditional speculum designs are uncomfortable for both practitioners and patients due to ergonomic issues, repetitive strain injuries, and require two-handed operation for locking, while providing inadequate visualization and increased discomfort with metal materials.
Innovation Solution
A speculum with an ergonomic handle design featuring a greater angle between the handle and bills, a rotatable upper bill, a locking mechanism with a pawl and engagement element, and an integrated illumination source, allowing one-handed operation and reduced discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the speculum uses a traditional 90-degree angle between handle and bills, then the structure is simple, but insertion and maintenance are difficult and uncomfortable for practitioner and patient
Solution Approach 1:
The patent changes the angle parameter between the handle and bills from the traditional 90 degrees to an obtuse angle (greater than 90 degrees). This parameter modification improves ease of insertion and maintenance comfort for both practitioner and patient, while maintaining structural simplicity through the unitary construction of the handle and transition portion.
2Ease of operation
If traditional screw and locking nut apparatus is used to hold speculum in open position, then the locking function is achieved, but both hands are required to lock and it increases procedure time
Solution Approach 1:
The patent extracts the complex screw and locking nut mechanism from the speculum design and replaces it with a simplified locking mechanism that can be operated with one hand. This removal of unnecessary complexity directly reduces the time required to lock the speculum in the open position and enables one-handed operation.
Solution Approach 2:
The locking mechanism is designed to be self-contained and easy to operate, allowing the practitioner to lock the speculum in place using only one hand without requiring assistance or complex manual manipulation. The mechanism serves itself through intuitive design that reduces procedural time.
3Strength
If metal material is used for speculum, then structural strength is sufficient, but the cold feeling upon entry causes patient discomfort and tension
Solution Approach 1:
The patent employs composite material construction, combining metal components for structural strength with plastic or polymer materials for patient-contact surfaces. This composite approach maintains the necessary mechanical strength of the speculum while eliminating the cold feeling and discomfort associated with pure metal construction.
4Ease of operation
If two handle portions squeezed together or lever depressed to expand body portion, then the speculum can be opened, but repetitive action causes ergonomic issues and hand fatigue for practitioner
Solution Approach 1:
The actuation mechanism is designed to be self-contained and easy to operate, allowing the practitioner to open the speculum using only one hand without requiring repetitive squeezing or lever depression. The mechanism serves itself through intuitive design that reduces procedural time and minimizes repetitive strain on the practitioner's hand.
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 reduces hand fatigue, improves patient comfort, and enables easier visualization with minimal noise and resistance during use, while allowing for efficient insertion and removal.
Implementation Method 1
an upper bill rotatably coupled to the lower bill at the transition portion, allowing the upper bill to move relative to the lower bill to move the speculum into an open position
Implementation Method 2
an integrated illumination source, allowing one-handed operation and reduced discomfort
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
The present disclosure relates to an ergonomically designed vaginal speculum. The speculum includes a body portion comprising a handle configured to be grasped by a user of the speculum, a lower bill, and a transition portion between the handle and the lower bill. The speculum further includes an upper bill rotatably coupled to the lower bill at the transition portion, allowing the upper bill to move relative to the lower bill to move the speculum into an open position, a window frame coupled to the upper bill defining a viewing window, and an actuation mechanism coupled to the upper bill to cause separation of the upper bill from the lower bill. The transition portion creates an angle greater than 90 degrees between the handle and the lower bill. The speculum may further include a locking mechanism and an illumination source.