Multi-bit Tool Spring Actuation Jamming Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multi-bit tools with spring loaded actuation mechanisms require a two-step process to switch between tool bits, leading to frequent jamming issues due to the close fit of cartridge mechanisms within the housing, necessitating manual unjamming instructions.
Innovation Solution
A multi-bit tool design featuring a substantially annular housing with a rigid main frame and spring loaded actuator mechanisms, where the bit selector's extension and retraction cam surfaces guide trigger members to extend and retract tool bits seamlessly, preventing jamming by ensuring each bit is retracted before another is extended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If cartridge type spring loaded actuation mechanisms are closely fit into the outer housing in abutting relation, then the device compactness is improved, but the reliability deteriorates due to frequent jamming of working elements
Solution Approach 1:
The patent extracts the spring loaded actuation mechanisms from their traditional cartridge configuration and relocates them to individual cavities within the rigid main frame member. This separation removes the mechanisms from the problematic abutting arrangement against the outer housing, eliminating the jamming issue while preserving compactness through the integrated cavity design.
Solution Approach 2:
The patent segments the actuation mechanisms by providing individual cavities for each mechanism within the rigid main frame member, rather than using a single cartridge housing. This segmentation isolates each spring loaded actuation mechanism, preventing interference and jamming between adjacent mechanisms while maintaining overall device compactness.
2Reliability
If a two-step process is used to switch between tool bits (retract then extend), then the actuation mechanism reliability is improved, but the ease of operation deteriorates due to increased操作步骤
Solution Approach 1:
The patent implements preliminary action by automatically retracting the currently extended tool bit through the cam surface mechanism before a new bit can be extended. The cam surface on the rotatable selector automatically performs the retraction action as part of the selection process, eliminating the need for manual two-step operation and preventing jamming conditions.
Solution Approach 2:
The patent merges the retraction and extension operations into a single integrated action through the cam surface mechanism. As the selector rotates to select a new bit, the cam surface simultaneously triggers retraction of the current bit and extension of the new bit, combining what were previously separate steps into one smooth operation.
3Productivity
If spring loaded actuation mechanisms are used for automatic bit extension, then the productivity is improved, but the device complexity increases due to additional spring arrangements
Solution Approach 1:
The patent applies parameter changes by utilizing the elastic potential energy storage capability of springs to convert small actuator movements into rapid bit extension. The spring mechanism transforms the parameters of the actuation system, allowing quick bit deployment from minimal user input, thereby improving productivity without requiring complex control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces jamming and enhances ergonomics, allowing for smoother and more efficient operation by ensuring each tool bit is fully retracted before the next is extended, eliminating the need for manual unjamming.
Implementation Method 1
spring loaded actuator mechanisms
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An apparatus has a plurality of working elements that are independently movable between a retracted position and an extended in-use position Spring loaded actuation mechanisms have an element extending configuration whereat the working element is moved to the extended in-use position and an element retracting configuration whereat the working element is moved to the retracted position. Each actuation mechanism has a trigger member movable between an extension triggering position and a retraction triggering position. The actuation mechanism is urged to its retracting configuration by movement of the trigger member to its retraction triggering position and is urged to its extended in-use configuration by movement of the trigger member to its extension triggering position A bit selector having an extension portion is movable between various actuation positions whereat the extension portion engages a corresponding trigger member, thereby urging the actuation mechanism to the element extending configuration.