Sensor-Timed Driving Tool for Reliable Nail Loading
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Solution Overview
Problem
Existing driving tools face issues such as nail jamming due to delayed driver return, complex mechanical configurations, and increased mechanical loss, leading to instability and higher costs.
Innovation Solution
A driving tool with a feeder that loads driving members in parallel using a flexible member, a driver that moves in the driving direction, a lifter that moves opposite to the driver, and a position detection sensor to control the feeder, simplifying the structure and ensuring timely loading without mechanical engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feeder mechanically engages the lifter to supply nails in conjunction with the lifter's movement, then the nail feeding can be coordinated with the driver's return, but the configuration becomes complicated and robustness decreases
Solution Approach 1:
The patent replaces the mechanical engagement between the feeder and lifter with an electronic control system. The controller receives a signal from the position detection sensor when the driver reaches the standby position and automatically activates the feeder, eliminating the need for mechanical coupling while improving reliability and reducing complexity
Solution Approach 2:
The patent introduces a position detection sensor and controller as intermediaries between the lifter and feeder. Instead of direct mechanical engagement, the sensor detects the driver's position and the controller coordinates the feeder's operation, thereby simplifying the overall configuration while maintaining coordination
2Manufacturing precision
If the feeder mechanically engages the lifter, then the nail feeding timing can be coordinated, but mechanical loss increases and accuracy varies
Solution Approach 1:
The patent eliminates mechanical loss by replacing the mechanical engagement system with an electronic control system. The controller precisely controls the feeder's operation based on signals from the position detection sensor, achieving accurate nail feeding without the mechanical losses associated with direct mechanical coupling
3Reliability
If the driver returns slowly due to low battery power, then the driver can reach the standby position, but the feeder may supply a nail before the driver is ready causing nail-jamming
Solution Approach 1:
The patent implements a feedback control system where the position detection sensor continuously monitors the driver's position and sends signals to the controller. The controller uses this feedback information to determine the exact moment to activate the feeder, ensuring that nails are supplied only when the driver is ready, thereby preventing nail-jamming while maintaining productivity
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 stable and precise loading of driving members at appropriate timings, reducing complexity and mechanical interference, and maintaining robustness while simplifying the tool's configuration.
Implementation Method 1
a position detection sensor that detects a position of the lifter or the driver
Data Source
AI summary
A driving tool includes a feeder that successively loads a driving member to a loading position. A driver moves downward in a driving direction to drive the driving member loaded to the loading position. A plurality of driving members are combined in parallel by a flexible member. A lifter engages the driver to move the driver upward in a direction opposite to the driving direction. A position detection sensor detects a rotation position of the lifter to detect a position of the driver. A controller determines that a tip end of the driver is positioned above the loading position according to a signal from the position detection sensor. The controller loads the driving member via the feeder.