Ultrasonic Forceps Jaw Structure for Precise Probe Alignment
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Solution Overview
Problem
Existing forceps-type energy treatment devices face challenges in efficiently transmitting ultrasonic vibrations and high-frequency currents to the distal end for effective treatment of biological tissues, while ensuring safe operation and minimizing electrical contact risks.
Innovation Solution
The device incorporates a longitudinal probe that transmits ultrasonic vibrations and high-frequency currents through a horn to a distal end, with a movable handle and jaw mechanism that allows for safe and controlled grasping of tissues, using an opening/closing axis member to attach the jaw to the sheath without overlapping the hollow portion, ensuring secure electrical connections and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the jaw is attached to the sheath using a bearing or similar component between the outer peripheral surface of the sheath and the inner peripheral surface of the jaw, then the jaw can rotate around the opening/closing axis, but the alignment precision and control accuracy of the jaw relative to the probe deteriorates
Solution Approach 1:
The invention extracts the bearing component from the attachment mechanism and replaces it with a direct attachment structure where the jaw is attached to the sheath through a simplified interface. This eliminates the intermediate bearing component that caused alignment imprecision while maintaining the rotational capability for jaw opening and closing operations.
Solution Approach 2:
The invention introduces an asymmetric attachment structure where the jaw and sheath are connected through a specific geometric relationship that ensures precise alignment. The asymmetric design allows the jaw to rotate accurately around the opening/closing axis while maintaining proper alignment with the probe, unlike symmetric bearing-based systems.
2Adaptability or versatility
If the opening/closing axis is positioned to allow jaw rotation, then the jaw can grasp and peel treatment objects, but looseness between the probe and jaw increases
Solution Approach 1:
The invention applies local quality by creating a specific geometric relationship at the attachment location between the jaw and sheath. The local geometry is designed to minimize looseness while still allowing the necessary rotation for grasping and peeling operations, rather than using a generic bearing-based approach.
Solution Approach 2:
The attachment structure is pre-designed with specific dimensional relationships that preliminarily establish precise alignment between the jaw and probe. This preliminary geometric configuration ensures that when the jaw rotates for operation, it maintains proper alignment and does not develop looseness relative to the probe.
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
This design enables efficient energy treatment by ultrasonic vibration and high-frequency current application, with enhanced safety features to prevent electrical shocks and improve operational control.
Implementation Method 1
a longitudinal probe that transmits an ultrasonic vibration; a distal end portion that is provided on a distal end side of the probe and treats a treatment object by the ultrasonic vibration
Data Source
AI summary
An energy treatment device includes a sheath including a hollow portion, a fixed handle provided at a proximal end of the sheath, a probe provided in the hollow portion, a movable handle including a jaw having a recessed portion along a rotation axis of the movable handle extending in a direction orthogonal to the central axis, a metal member provided at a position including the rotation axis, and a preventing member which prevents the metal member from falling out from its position. The sheath extends along a central axis of the energy treatment device and includes an attaching portion by which the movable handle is attached to a position offset from the central axis, the metal member is provided around the rotation axis such that the jaw is rotatable with respect to the sheath, and the prevention member is fixed to the recessed portion.