Electric Driving Tool Shutter Linkage for Reliable Driver Blocking
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Solution Overview
Problem
Conventional electric driving tools face issues with the restricting member failing to return to the blocked position due to torsion spring malfunctions, leading to unreliable operation.
Innovation Solution
A connecting member connects the contact arm and the restricting member, ensuring the restricting member moves reliably between blocked and open positions in response to the contact arm's movements, with the restricting member moving perpendicular to the driver's direction to reduce installation space and enhance strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a torsion spring is used to return the restricting member to the blocked position, then the structure is simple, but the reliability deteriorates when the torsion spring fails
Solution Approach 1:
A connecting member is introduced as an intermediary mechanical element between the contact arm and the restricting member. This connecting member mechanically couples the two components, ensuring that the restricting member is reliably returned to the blocked position through direct mechanical linkage rather than relying solely on the torsion spring, thus improving reliability while maintaining structural simplicity
Solution Approach 2:
The connecting member is designed to compensate for potential torsion spring failures in advance. By providing an alternative mechanical return path through the connecting member and contact arm, the system preemptively addresses the reliability issue before spring failure occurs, ensuring continuous reliable operation
2Strength
If the restricting member moves perpendicular to the driver's direction, then the strength and space efficiency improve, but the mechanism complexity increases
Solution Approach 1:
The restricting member is designed to move in a direction perpendicular to the driver's movement direction, utilizing a different spatial dimension for its motion. This dimensional change allows the restricting member to achieve both strength and compactness without interfering with the driver's linear path, while the connecting member translates the contact arm's motion into this perpendicular movement through a straightforward mechanical linkage
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
The solution ensures reliable movement of the restricting member, reducing installation space and enhancing its strength, while maintaining efficient operation even with torsion spring failures.
Implementation Method 1
The restricting member is rotatably attached to a tool body around a pivot pin and is biased to a blocked position by a torsion spring
Implementation Method 2
A connecting member connects the contact arm and the restricting member. The connecting member moves the restricting member from the blocked position to the open position in response to a movement of the contact arm
Data Source
AI summary
A driving tool has a nose portion in which a driving channel is formed. A contact arm is movably provided at an end of the nose portion. The contact arm moves between an OFF position and an ON position. A driver strikes a driven member set in the driving channel. A shutter moves between a blocked position located on a travel path of the driver, and an open position retracted from the travel path to allow the driver to move. A connecting rod connects the contact arm and the nose portion. The connecting rod allows the shutter to move from the open position to the blocked position in response to a movement of the contact arm from the ON position to the OFF position.