Remote Actuator Attitude Control for Curved Surgical Paths
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Solution Overview
Problem
Conventional remote controlled actuators in medical and mechanical processing fields face challenges in processing complex shapes and sites difficult to view, particularly in orthopedic surgeries where precise and accurate processing of artificial joint insertion holes is required, with limited ability to change the tool's attitude and maintain stability, especially when the elongated pipe is curved.
Innovation Solution
A remote controlled actuator design that includes a spindle guide section with a distal end member and a flexible attitude altering member, allowing remote control alteration of the tool's attitude through a guide hole, using a rotary shaft and attitude altering drive source to maintain stability and precision, even when the pipe is curved, by selectively advancing and retracting the attitude altering member.
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 postoperative trace is minimized, but the working range of the tool is limited and processing precision deteriorates
Solution Approach 1:
The actuator introduces a degree of freedom that allows the tool to dynamically change its attitude (angular position) relative to the elongated pipe. This dynamic adjustment capability enables the tool to maintain proper orientation for precise processing even when the pipe is curved, resolving the contradiction between minimizing incision and maintaining processing precision.
Solution Approach 2:
The invention adds an angular dimension of control to the traditional linear insertion approach. By controlling both the insertion depth and the tool's attitude angle independently, the system can navigate curved paths while maintaining precise control over the tool's working orientation, thereby achieving both minimal incision and high processing precision.
2Strength
If the tool is inserted deep into the bone to process artificial joint insertion holes, then adhesion strength is enhanced, but the tool's attitude control becomes difficult and stability deteriorates
Solution Approach 1:
The actuator provides dynamic attitude control capability that remains effective regardless of insertion depth. The degree of freedom mechanism allows real-time adjustment of the tool's angular position, maintaining stability and controllability even when the tool is inserted deep into the bone, thus enabling both deep insertion for strong adhesion and stable attitude control.
3Device complexity
If conventional actuators control only rotation of the machine tool, then device complexity is reduced, but the capability to process complicated shapes and difficult-to-view sites is limited
Solution Approach 1:
The actuator adds attitude control capability to the traditional rotation control, creating a more versatile system. The degree of freedom mechanism enables independent control of both the tool's rotational position and its angular orientation (attitude), providing the adaptability needed to process complicated shapes and difficult-to-view sites while maintaining relatively simple device architecture.
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
A remote controlled actuator includes a spindle guide section (3) of an elongated configuration, a distal end member (2) fitted to a distal end of the spindle guide section (3) through a distal end member connecting imit (15) for alteration in attitude, a tool (1) rotatably provided to the distal end member (2), a tool rotating drive source (41) for rotating the tool, and an attitude altering drive source (42) for manipulating the attitude of the distal end member. The distal end member rotatably supports a spindle (13) then holding the tool (1). The spindle guide section (3) includes a rotary shaft (22) for transmitting rotation of the tool rotating drive source to the spindle and a guide hole (30a). A flexible attitude altering member (31) capable of altering the attitude of the distal end member is reciprocally movably inserted within the guide hole (30a).