Surgical Instrument Hinge Pin Locking Mechanism
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Solution Overview
Problem
Existing surgical instruments face challenges in maintaining stable component arrangement during cleaning, leading to potential damage and entanglement issues due to single connections in cleaning positions.
Innovation Solution
A surgical instrument design where the pivotable handle part is inseparably connected to the sliding part and actuating device, featuring a locking mechanism with a hinge pin that allows stable separation of components, preventing unintentional reconfiguration during cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sliding part is completely removed from the base part for cleaning, then cleaning accessibility is improved, but component stability and ease of reassembly deteriorate
Solution Approach 1:
The hinge pin is designed to be displaceable between two positions: in the first position, it maintains the sliding part in the working position on the shaft; in the second position, it allows the sliding part to be lifted off the shaft for cleaning. This dynamic adjustment of the connection state enables both stable operation and easy cleaning.
2Reliability
If the sliding part is captively mounted on the base part in cleaning position, then component stability is improved, but device complexity and risk of damage increase
Solution Approach 1:
The connection mechanism is divided into two independent connections: a first connection between the sliding part and the pivotable handle part, and a second connection between the distal end of the sliding part and the shaft. This segmentation allows each connection to be optimized independently, with the first connection remaining stable and the second connection being releasable for cleaning.
3Reliability
If a locking mechanism is provided to prevent unintentional disassembly, then component stability is improved, but ease of operation deteriorates
Solution Approach 1:
The hinge pin serves dual functions: it acts as a locking mechanism in the first position to prevent unintentional disassembly during normal operation, and as an unlocking mechanism in the second position to enable intentional disassembly for cleaning. The deliberate action required to displace the hinge pin ensures security while maintaining ease of intended operation.
Data Source
Figure 1~3b
Figure 4a~4b
Figure 4c~4e
AI summary
The invention relates to a surgical instrument (10) having a base part (20) comprising a shaft (22) and a stationary grip part (24), wherein a sliding part (30) is arranged on the shaft (22) in such a way as to be guided slidably thereon, wherein a pivotable grip part (40) for actuating the sliding part (30) is arranged pivotably on the base part (20) by means of a hinge pin (50), wherein the sliding part (30) has a distal end region (30a) and a proximal end region (30b), wherein, in the proximal end region (30b), the sliding part (30) is connected pivotably to the pivotable grip part (40), and, in the distal end region (30a), the sliding part (30) is connected to an actuating device (61) for a working end (60), said actuating device (61) being arranged on the shaft (22), wherein the pivotable grip part (40) is connected non-releasably to the sliding part (30) and non-releasably to the actuating device (61), wherein the pivotable grip part (40) has an oblong hole (41) through which the hinge pin (50) passes, and wherein a locking device is provided which, in a first position, suppresses a sliding movement of the hinge pin (50) along the oblong hole (41) and which, in a second position, permits a sliding movement of the hinge pin (50) along the oblong hole (41).