Gas-Spring Driving Tool Cam Mechanism for Driver Return
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Solution Overview
Problem
Conventional gas-spring type driving tools face challenges in implementing mechanical control configurations to continuously activate the electric motor after a driving operation, due to their design which requires direct external force application to the driver to avoid unbalanced loads, making it difficult to apply conventional mechanical control configurations like those used in mechanical-spring type tools.
Innovation Solution
A gas-spring type driving tool is designed with a mechanical control configuration that includes a cam and restriction member, where the cam is interlocked with the lift wheel to maintain the energizing switch in an on-state after the driving operation, ensuring the electric motor continues to be activated, even when the trigger is released, allowing the driver to return to a standby position reliably.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical control configuration is applied to continuously activate the electric motor after driving operation, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The cam is integrated into the lift wheel structure, combining the lifting function and the motor continuation control function into a single component. This merging reduces the number of separate parts while achieving the desired reliability improvement through mechanical control.
Solution Approach 2:
The restriction member acts as an intermediary between the cam and the energizing switch. It translates the cam's mechanical motion into a reliable switching action that maintains motor activation, providing a simple yet effective intermediary mechanism that improves reliability without adding significant complexity.
2Reliability
If the electric motor is continuously activated after driving operation, then the driver return reliability is improved, but the energy consumption increases
Solution Approach 1:
The motor is activated periodically - running during the driving operation and continuing for a specific duration after operation to return the driver, then stopping. This periodic activation pattern ensures reliable driver return while avoiding continuous energy consumption, as the motor only operates when necessary for functional purposes.
3Ease of manufacture
If a conventional mechanical control configuration is applied, then the ease of manufacture is improved, but the adaptability to gas-spring type driving tool decreases
Solution Approach 1:
The cam is positioned specifically within the lift wheel structure at a location that allows it to interact with the restriction member while maintaining the gas-spring type driving tool's direct force application characteristic. This localized placement enables the control function without compromising the tool's fundamental operational quality or requiring extensive design changes.
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
This mechanical configuration allows the electric motor to remain activated after the driving operation, preventing malfunctions associated with electrical control methods and enabling reliable return of the driver to its standby position, enhancing the tool's operational efficiency and reliability.
Implementation Method 1
a cam (23) interlocked with the lift wheel (22)
Data Source
AI summary
In a driving tool, during and/or after a driving operation has been completed, a restriction member is retained in an on-position by a cam. An energizing switch is retained in an on-state by an actuation portion of the restriction member. Because of this configuration, if a trigger is released during and/or after the driving operation has been completed, an electric motor continues to be activated, which causes a driver to return to a standby position.