T-Shaped Driving Tool With Retractable Bar Mechanism
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Solution Overview
Problem
Conventional T-shaped driving tools have a bar that cannot be separated from the driving shaft, limiting the replacement of driving members and occupying excessive space due to the fixed nature of the bar's protruding balls.
Innovation Solution
A control mechanism with a control rod and resilient member, featuring notches of different depths, allows the engaging member to protrude or retract, enabling the bar to be separated from the driving shaft for easy replacement and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bar is fixedly connected to the driving shaft with protruding balls, then the bar cannot be separated for replacement, but this restricts the replacement of driving members and occupies excessive space
Solution Approach 1:
The control mechanism transforms the static fixed connection into a dynamic controllable connection. The engaging member can switch between protruding (locked) and retracted (unlocked) states based on control rod position, allowing the bar to be either firmly connected or easily separated from the driving shaft as needed
Solution Approach 2:
The control rod acts as an intermediary mechanism between the user's operation and the engaging member's state. By manipulating the control rod, the user indirectly controls whether the engaging member protrudes or retracts, enabling seamless transition between locked and unlocked states without directly manipulating the engaging member itself
2Ease of operation
If the engaging member protrudes out from the bar, then the bar can adjust arm of force length, but the bar cannot be separated from the driving shaft
Solution Approach 1:
The control mechanism enables the bar to dynamically change its functional state. When the engaging member protrudes, the bar is locked for use with adjusted arm of force length. When retracted, the bar can be separated for storage, allowing the tool to transition between operational and compact states
3Adaptability or versatility
If the control mechanism is added to enable separation, then the bar can be separated for replacement, but the device complexity increases
Solution Approach 1:
The control mechanism is segmented into distinct functional components: the control rod for operation, the resilient member for providing restoring force, and the engaging member for locking/unlocking. This segmentation allows each component to perform its specific function simply, reducing overall complexity while achieving the desired separability
Solution Approach 2:
The resilient member provides automatic restoring force to return the control rod and engaging member to their original positions after operation. This self-service mechanism eliminates the need for additional complex mechanisms to reset the system, reducing overall device complexity while maintaining functionality
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
Enables adjustable length adjustment and easy replacement of driving members, reducing tool size and improving storage efficiency by allowing the bar and driving shaft to be separated.
Implementation Method 1
By the resilient member, the control rod is positioned at the first position where the engaging member is engaged with the first notch
Data Source
AI summary
A driving tool includes a driving shaft and a bar which movably extends through the driving shaft. At least one of two end sections of the bar has a hole and a recess, wherein an engaging member is engaged with the hole and protrudes out from outer surface of the bar. The recess is defined axially in the end of the at least one end section and a control rod and a resilient member are received in the recess. The control rod includes a first notch and a second notch of different depths. When the control rod is operated to overcome a force of the resilient, the engaging member is engaged with the second notch, the engaging member is retracted into the at least one end section. The bar can be separated from the driving shaft so as to change the driving shaft.