High-Frequency Electrotome Jaw-Blade Interlock for Tissue Cutting
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Solution Overview
Problem
Existing high-frequency electrotome surgical instruments face issues with independent jaw and blade control mechanisms leading to operational inflexibility, accidental triggering, and safety hazards due to close proximity of control mechanisms, resulting in inconsistent jaw closure during cutting and potential tissue damage.
Innovation Solution
A locking mechanism is introduced between the control wrench and button, ensuring the jaw is closed before the blade can be activated, with a consistent moving direction and a locking lug boss and inverted buckle system to prevent accidental blade activation, combined with a wrench locking mechanism for enhanced operational smoothness and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If locking mechanisms are disposed for locking the jaw control mechanism, then the jaw closure stability is improved, but the operational flexibility is worsened, resulting in locking failures or resetting failures
Solution Approach 1:
The locking mechanism is activated automatically when the jaw reaches the closed position, without requiring manual intervention. The locking lug engages with the locking groove at the precise moment the jaw closes, ensuring stability is achieved through preliminary automatic action rather than requiring continuous manual locking adjustment.
Solution Approach 2:
The locking mechanism is designed to engage and disengage automatically based on the jaw's position. The locking lug moves with the jaw closure and automatically engages with the locking groove when the jaw reaches the closed position, and automatically disengages when the jaw opens, eliminating the need for manual locking operations.
2Volume of moving object
If the blade control mechanism and jaw control mechanism are disposed too close to each other on the handheld handle, then the device compactness is improved, but accidental triggering occurs, resulting in tissue accidental cutting
Solution Approach 1:
The locking mechanism acts as an intermediary between the jaw control and blade control. It prevents the blade from being activated unless the jaw is first closed, by controlling the availability of the blade control mechanism through the locking state of the jaw mechanism.
Solution Approach 2:
The system requires the jaw to be closed first before the blade can be activated. The locking mechanism ensures this sequence is enforced, preventing accidental blade triggering before proper tissue clamping occurs.
3Adaptability or versatility
If the control wrench and control button are disposed independently, then the operational independence is improved, but the risk of accidental blade activation before jaw closure is increased
Solution Approach 1:
The locking mechanism merges the control of the jaw and blade into a single integrated system. Although the control wrench and button remain separate, the locking mechanism connects their functions, ensuring the blade can only be activated after the jaw is closed, thereby combining safety control with operational independence.
Data Source
AI summary
A safe high-frequency electrotome surgical instrument, including a housing, a shaft rod member, a jaw assembly, a control wrench, a blade, and a control button. The control wrench controls opening and closing of the jaw assembly through a jaw control mechanism. The control button drives the blade to move for cutting through a blade control mechanism. The moving direction of the control wrench is consistent with that of the control button, and a locking mechanism is disposed between the control wrench and the control button. The locking mechanism is composed of a locking lug boss and an inverted buckle capable of being clamped with the locking lug boss. The locking lug boss is disposed on the control wrench, and the inverted buckle is disposed on the control button or on a triggering connecting rod. In a first state, the jaw assembly is opened, and the locking lug boss is clamped with the inverted buckle, such that the control button is not movable. In a second state, the jaw assembly is closed, and the locking lug boss is separated from the inverted buckle, such that the control button is movable to drive the blade for cutting. A locking structure and a turnback mechanism are disposed to ensure that the blade performs telescopic cutting when the jaw assembly is closed, thereby ensuring operational safety.