Reciprocating Surgical Instrument Chuck for Multi-Profile Tool Retention
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Solution Overview
Problem
Existing reciprocating surgical instruments lack a versatile chuck system capable of securely accommodating tools with various shank profiles, such as flat and round shanks, which limits their adaptability and efficiency in surgical procedures.
Innovation Solution
A chuck system with a shaft and securing member that allows for the securement of tools with different shank profiles through a radially movable locking mechanism, featuring a cylindrical bore for round shanks and transverse slots for flat shanks, enabling easy tool exchange without the need for wrenches or special keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional chuck design is used, then the structure is simple, but it cannot accommodate tools with various shank profiles (flat, round, etc.)
Solution Approach 1:
The chuck is designed with a universal receptacle that can accommodate multiple shank profiles (flat, round, and other configurations) through a single securing mechanism. The securing member with its radially movable design allows the same chuck structure to universally secure different tool types without requiring profile-specific chucks, thereby achieving multi-functionality.
Solution Approach 2:
The securing member is designed to be selectively movable between a first position (withdrawn from receptacle for tool insertion/removal) and a second position (located within receptacle through securing aperture for tool securing). This dynamic positioning capability allows the static chuck structure to adapt to different tool profiles, resolving the contradiction between versatility and complexity.
2Reliability
If a secure locking mechanism is implemented, then tool security is improved, but tool changeover time increases
Solution Approach 1:
The securing function is extracted into a separate, independently movable securing member that can be quickly positioned into or out of the receptacle. This separation allows the tool to be inserted into the receptacle first, and then the securing member is independently moved to lock it, enabling sequential operations that reduce overall changeover time while maintaining secure locking.
Solution Approach 2:
The receptacle is pre-configured with the securing aperture in predetermined positions that align with the tool shank profiles. This preliminary configuration allows tools to be quickly inserted without requiring complex alignment procedures, and the securing member can be rapidly engaged once the tool is in place, reducing tool changeover time while ensuring reliable securing.
3Ease of operation
If a radial movement mechanism is added for securing tools, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The chuck is segmented into distinct functional components: the stationary receptacle, the tool-holding interface, and the separately movable securing member. This segmentation allows the radially movable securing member to be independently operated for tool insertion and removal, improving ease of operation. The modular design minimizes overall complexity by assigning specific functions to separate components rather than requiring a complex integrated mechanism.
Data Source
AI summary
Devices are described relating to the retaining of surgical tools within the chuck of a reciprocating surgical instrument, such as a reciprocating saw. A securing chuck is disclosed for securing a surgical tool to a reciprocating surgical instrument that comprises a shaft and a securing member. The shaft defines an axis and has a cylindrical bore extending along the axis. The bore is shaped to receive a substantially rounded tool shank. A pair of transverse slots extends into the shaft along a plane passing through the axis for receiving a substantially flattened tool shank. The transverse slots intersect with the cylindrical bore. The securing member is carried by the shaft and is radially movable relative to the bore both inwardly and outwardly to secure the surgical tool in the chuck.