Rotatable Pin Driver Handpiece for Surgical Pin Orientation
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Solution Overview
Problem
Conventional surgical handpiece assemblies for driving surgical pins are difficult to orient correctly without repositioning the user or patient, necessitating improvements for enhanced usability and efficiency.
Innovation Solution
A surgical power tool assembly with a handpiece housing, electric motor, controller, battery, trigger, and pin driver attachment, featuring a collet that can be clamped and unclamped, and an output drive rotated by the motor, allowing for ergonomic hand positioning and controlled motor speed adjustment through trigger actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional pistol grip surgical handpiece is used, then the device is simple to manufacture, but it is difficult to correctly orient the surgical pin without repositioning the user or patient
Solution Approach 1:
The patent introduces a rotating coupling mechanism that adds rotational freedom between the handpiece and attachment. This allows the attachment (and surgical pin) to be oriented in different directions while maintaining a stable pistol grip handpiece configuration, solving the orientation problem without fundamentally changing the handpiece design.
Solution Approach 2:
The surgical tool is divided into distinct segments: the handpiece housing, the coupling mechanism, and the attachment. This segmentation allows independent optimization of each component - the pistol grip handpiece remains simple while the coupling provides rotational adjustment capability.
2Ease of operation
If a pistol grip handpiece configuration is used, then the device structure is simple, but the user cannot easily adjust hand positioning during the procedure
Solution Approach 1:
The coupling mechanism introduces dynamic adjustability to the otherwise static pistol grip configuration. The user can rotate the attachment relative to the handpiece to achieve comfortable hand positioning while maintaining the familiar pistol grip hold during the procedure.
3Manufacturing precision
If multiple components are used to achieve precise pin insertion, then the insertion precision is improved, but the component complexity increases
Solution Approach 1:
The patent combines the driving function and the orientation adjustment function into a single integrated coupling mechanism. This merging provides precise pin insertion capability through rotational adjustment without requiring separate positioning devices, thereby avoiding excessive component proliferation.
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
Facilitates precise and efficient insertion of surgical pins with improved ergonomic design and reduced component complexity, enhancing workflow efficiency in procedures like robotically-assisted knee arthroplasty.
Implementation Method 1
an electric motor positioned in the handpiece housing... an output drive coupled to the electric motor and configured to be rotated about an axis by the electric motor
Implementation Method 2
a battery removably coupled to the handpiece housing and configured to supply electrical power to the controller
Implementation Method 3
a collet operable in a clamped state and an unclamped state, the collet operable to engage a surgical pin when in the clamped state
Data Source
AI summary
A surgical power tool assembly is provided. The assembly includes a handpiece and a pin driver attachment coupled to the handpiece. The handpiece includes a motor and a controller for operating the motor. A trigger is movably coupled to a housing of the handpiece. The controller controls a speed of the motor based on an actuated position of the trigger. An output drive is coupled to the motor and is rotated by the motor about an axis. An actuation surface of the trigger is moveable relative to the housing such that the actuation surface is closer to the axis in the actuated position than in the unactuated position. The pin driver attachment includes a housing for coupling to the handpiece. The pin driver attachment may include a lever to clamp a surgical pin to drive the surgical pin into bone.