Grasping Device Jaw Alignment via Pin Member Adjustment
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Solution Overview
Problem
Existing grasping devices for treatment instruments face challenges in achieving uniform grasping force and efficient energy application due to variations in jaw alignment and clearance, leading to inconsistent treatment performance.
Innovation Solution
A manufacturing method for a grasping unit with a pin member defining the rotation axis of jaws, allowing for adjustment of relative positions and clearance between jaws, ensuring uniform grasping force and efficient energy distribution by inserting the pin member into holes of varying sizes on each jaw, and joining it to secure the desired alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pin member is inserted into the first hole and second hole without adjustment, then the manufacturing process is simple, but the jaw alignment and clearance are inconsistent leading to non-uniform grasping force
Solution Approach 1:
The patent applies preliminary action by adjusting the relative positions of the first jaw and second jaw to predetermined positions before joining the pin member. This ensures that the jaws are properly aligned and the clearance is uniform before the pin member is permanently fixed, thereby achieving consistent grasping force without requiring complex manufacturing processes.
2Reliability
If the pin member is joined to the second jaw without adjusting jaw positions, then the assembly process is fast, but the grasping force is non-uniform affecting treatment performance
Solution Approach 1:
The patent implements preliminary action by adjusting the relative positions of the jaws to predetermined positions before joining the pin member. This preliminary adjustment ensures uniform clearance and alignment, which guarantees reliable treatment performance while maintaining efficient assembly through a straightforward adjustment-join sequence.
3Manufacturing precision
If the holes are made the same size for both jaws, then the manufacturing is simple, but the pin member cannot define the rotation axis accurately for both jaws
Solution Approach 1:
The patent applies local quality by making the first hole and second hole different in size according to the specific requirements of each jaw. The first hole in the first jaw and the second hole in the second jaw are sized appropriately to accommodate the pin member and define the rotation axis accurately for each jaw's specific functional requirements, rather than using a uniform hole size.
Data Source
AI summary
In a manufacturing of a grasping device that is openable and closable and includes a first jaw having a first hole and a second jaw having a second hole larger than the first hole, the first jaw is arranged in between protruding portions of the second jaw. The second hole is located outside the first hole in a width direction of the grasping device, and a cross-sectional area of the second hole is larger than the first hole. A pin member is inserted through both the first hole and the second hole. The positions of the first jaw and the pin member are adjusted relative to the second jaw to predetermined positions. The pin member is fixed to the second jaw upon positioning the first jaw and the second jaw at the predetermined positions.