Endoscope Deflection Transmission via Spherical Pivot
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Solution Overview
Problem
Existing deflection movement transmission devices for endoscopes lack precision in converting pivotal movements of control elements into bending movements of deflecting portions, leading to suboptimal performance in medical examinations.
Innovation Solution
A deflection movement transmission device comprising a control element with a pivot portion supported on a base element, movement transmission wire bodies articulated to the pivot portion, and a bendable body guided by a transmission guiding body, ensuring exact pivotal movement transmission through point contact or sliding articulation, allowing precise deflection of the bendable body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional deflection movement transmission device is used, then the structure is simple, but the precision of converting pivotal movement to deflection movement is insufficient
Solution Approach 1:
The control element employs a spherical pivot portion that pivots on a spherical head portion of the base element. This spherical geometry ensures that the distance from the articulation point of the movement transmission wire body to the head portion remains constant during pivotal movement, enabling precise and predictable conversion of pivotal movement to deflection movement while maintaining operational smoothness.
Solution Approach 2:
The invention changes the geometric parameters of the control element by using a spherical pivot portion with a specifically designed radius. The radius of the spherical pivot portion is configured to be larger than the distance from the articulation point to the longitudinal axis of the control element, which ensures constant distance maintenance during rotation and improves movement transmission precision.
2Reliability
If the control element is supported on the base element during pivotal movement, then the pivotal movement is exactly defined, but the distance from the articulation point to the head portion may vary during movement
Solution Approach 1:
Both the pivot portion of the control element and the head portion of the base element are designed with spherical geometry. This dual spherical configuration ensures that the pivot portion maintains constant distance from the head portion throughout the pivotal movement range, eliminating distance variation while preserving exactly defined pivotal movement and improving reliability.
Data Source
AI summary
The invention refers to a deflection movement transmission device comprising a control element (1) for effecting a deflection movement, the control element (1) having a pivot portion (11; 11′) that is supported on a head portion (31; 31′) of a base element (3) and is pivotable relative to the head portion (31; 31′) of the base element (3) for effecting a deflection movement; at least one movement transmission wire body (2, 2a, 2b) that is articulated to the pivot portion (11; 11′) of the control element (1); an elongate transmission guiding body (5) in the longitudinal direction of which the movement transmission wire body (2, 2a, 2b) is guided; and a bendable body (6) to be deflected that is seated at the end of the transmission guiding body (5), opposite to the control element (1), and to which the movement transmission wire body (2, 2a, 2b) is mounted in a manner spaced apart from a connection (61) to the transmission guiding body (5).