Endoscope Operation Portion with Asymmetric Suction Button
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Solution Overview
Problem
Conventional endoscope operation devices face challenges in accurately controlling the bending portion and preventing unintended movement during suction operations, making it difficult to maintain a stable field of view.
Innovation Solution
The endoscope operation portion incorporates a joystick-type bending operation lever with a suction button arranged at an obtuse angle to the lever shaft's central axis, ensuring the intersection point is within the operation body, and a planar surface at a 90° or larger angle to stabilize the user's finger contact, preventing the bending operation lever from shifting during suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the suction button is positioned on the operation portion body, then the suction function can be operated, but the bending operation lever may shift during suction causing unintended bending movement
Solution Approach 1:
The suction button is positioned asymmetrically relative to the lever shaft body's central axis, specifically at an obtuse angle position. This asymmetric placement ensures that the pressing direction of the suction button does not align with the lever's central axis, preventing the suction force from causing unintended lever movement or bending operations during suction.
2Ease of operation
If the bending operation lever is provided on the operation portion, then the bending portion can be controlled, but the lever may move unintentionally during other operations such as suction
Solution Approach 1:
The operation portion body serves as an intermediary structure that spatially separates the suction button's pressing direction from the lever shaft body's central axis. By positioning the suction button at an obtuse angle to the lever's central axis and ensuring the intersection point lies within the operation portion body, the design creates a geometric relationship that prevents force transmission from suction operations to the bending lever, thereby maintaining lever position stability.
3Reliability
If the suction button is arranged at an obtuse angle to the lever shaft body, then unintended lever movement is prevented, but the device complexity increases
Solution Approach 1:
The invention changes the angular parameter of the suction button's position relative to the lever shaft body's central axis, specifically setting it at an obtuse angle. This parameter change optimizes the geometric relationship to prevent force transmission that would cause unintended lever movement, while the intersection point constraint ensures the complexity is minimized by keeping the structural modification within the operation portion body.
Data Source
AI summary
An endoscope operation portion includes: an operation portion body provided being connected to a grasping portion; a joystick-type bending operation lever provided on a back side of the operation portion body, including a lever shaft body, and configured to perform a bending operation of a bending portion; and a suction button provided on a front side of the operation portion body so that an angle formed by an operation axis in a pressing-down operation direction relative to a central axis of the lever shaft body is an obtuse angle, and an intersection point between the central axis and the operation axis is positioned inside the operation portion body.