Medical Sheet Transfer Instrument With Self-Actuating Carrier
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Solution Overview
Problem
Existing transfer instruments for medical sheets require manual manipulation with forceps, which can hinder efficient transfer to a treatment site on a living body.
Innovation Solution
A transfer instrument with a first and second carrier member, including a support portion and a movement regulation mechanism, allows for efficient transfer of medical sheets by using the second carrier member without additional tools, and includes a movement range regulation portion to define the relative movement of the shafts, simplifying the operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual manipulation with forceps is used to transfer the medical sheet, then the transfer can be performed, but the transfer efficiency is reduced and the operation becomes complex
Solution Approach 1:
The second carrier member is designed to automatically grasp and transfer the medical sheet without requiring external forceps or additional tools. The carrier member's structure enables it to self-service the transfer function by utilizing the relative movement between the first and second shafts to propel the medical sheet from the support portion to the treatment site, thereby improving transfer efficiency and simplifying the operation.
Solution Approach 2:
The functions of holding the medical sheet and transferring it to the treatment site are merged into a single integrated system. The second carrier member combines the support portion (for holding) with the propulsion mechanism (for transfer), eliminating the need for separate forceps and reducing operational steps.
2Length of moving object
If the support portion is retracted into the outer cylinder, then the device profile is reduced for insertion, but the support portion must be curved and deformed which may complicate the structure
Solution Approach 1:
The support portion is designed to be nestable within the outer cylinder. When the first and second shafts move in the proximal end direction, the support portion is pulled back into the outer cylinder, creating a compact profile for insertion. The support portion can be curved and deformed during retraction but returns to its original shape when deployed, enabling space-efficient nesting without permanent structural compromise.
3Length of moving object
If the first shaft is made shorter than the outer cylinder, then the shaft can be entirely located on the distal end direction side, but this limits the movement range regulation
Solution Approach 1:
The movement range regulation portion acts as an intermediary mechanism between the shafts and the outer cylinder. It defines the distal end position of the first shaft's relative movement range without requiring the first shaft to extend beyond the outer cylinder. This intermediary structure enables precise movement control while maintaining a compact shaft configuration.
Data Source
AI summary
A transfer instrument includes: a movement regulation portion that regulates relative movement between a first shaft and a second shaft in an axial direction when a second carrier member moves between a first position where a first support portion is retracted into an outer cylinder and a second position where the first support portion is unfolded by being exposed from the outer cylinder in a distal end direction; a movement range regulation portion that defines a distal end position of a relative movement range of the first shaft; and an engagement portion that moves a first carrier member in a proximal end direction when the second carrier member moves from the second position toward the first position.