Remote Actuator Tool Attitude Control for Orthopedic Surgery
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Solution Overview
Problem
Conventional remote controlled actuators in medical and mechanical processing fields are limited in their ability to accurately process complex shapes and curved configurations, particularly in orthopedic surgeries where precise alignment of artificial joints with bone surfaces is required, due to their fixed attitude and limited flexibility.
Innovation Solution
A remote controlled actuator design that includes a spindle guide section with a flexible attitude altering member, allowing remote control alteration of the tool's attitude through a distal end member, supported by a rotary shaft and drive unit, with a position detector for precise positioning and a force increasing mechanism for enhanced output, enabling accurate processing of curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the elongated pipe is curved to minimize skin incision and muscular scission, then tissue invasion is reduced, but the tool's working range and processing accuracy are limited
Solution Approach 1:
The distal end member is designed to be movable relative to the spindle guide section, allowing dynamic adjustment of the tool's attitude. The attitude altering member enables the distal end member to change its orientation independently while the pipe maintains its curved configuration, thus preserving both the reduced tissue invasion and the processing accuracy
Solution Approach 2:
The invention adds a degree of freedom by allowing the distal end member to move in directions other than the longitudinal axis of the pipe. This enables the tool to adjust its attitude in multiple dimensions, compensating for the limitations imposed by the curved pipe configuration and maintaining processing accuracy without requiring a straight pipe
2Length of moving object
If the tool is rotatably provided only at the distal end of the elongated pipe, then the tool can be inserted deep into the bone, but the capability to process complex shapes and curved configurations is limited
Solution Approach 1:
The distal end member is made movable relative to the spindle guide section, enabling dynamic attitude adjustment of the tool. This allows the tool to adapt to complex shapes and curved configurations while maintaining deep insertion capability, as the movement is achieved through angular adjustment rather than extending the pipe length
Solution Approach 2:
The attitude of the distal end member can be adjusted in advance to match the required processing configuration. By pre-positioning the tool at the correct attitude before engagement, the system can handle complex shapes and curved configurations without requiring additional pipe sections or extensions
3Device complexity
If conventional remote controlled actuators are used with fixed attitude, then the structure is simple, but the ability to accurately process complex shapes and curved configurations is limited
Solution Approach 1:
The actuator structure is enhanced with a movable distal end member that can alter its attitude relative to the spindle guide section. This dynamic capability allows the tool to accurately follow complex trajectories and process curved configurations, significantly improving processing precision while adding only the necessary attitude adjustment mechanism
Solution Approach 2:
The attitude altering member acts as an intermediary between the spindle guide section and the distal end member. It transmits the attitude adjustment commands from the control system to the distal end member, enabling precise control of the tool's orientation without requiring complex reconfiguration of the entire actuator structure
Data Source
AI summary
A remote control actuator includes a spindle guide section (3), a distal end member (2) fitted to the tip of the spindle guide section for alteration in attitude, a tool (1) provided rotatably in the distal end member, a tool rotation drive source (41) for rotating the tool, and an attitude altering drive source (42) for altering the attitude of the distal end member. The spindle guide section has therein a rotary shaft (22) for transmitting a rotation of the tool rotation drive source to the tool, and an attitude altering member (31) capable of being selectively advanced or retracted by the attitude altering drive source for altering the attitude of the distal end member. A position detector (47) is provided for detecting the advanced or retracted position of the attitude altering member at a site distant from the attitude altering drive source.