Rechargeable Power Tool Standby and Lock-on Switch Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rechargeable electric power tools, such as jigsaws, require continuous operator effort to maintain motor power supply during workpiece cutting, leading to operator burden and inconvenience.
Innovation Solution
Incorporating a standby switch and a lock-on switch on the tool's housing, allowing the tool to be set to a standby state where power is not continuously supplied, and enabling easy transition to a driven state with a single switch operation, reducing operator burden and improving operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a trigger switch is used to supply electric power to the motor during workpiece cutting, then the motor can be driven continuously, but the operator burden increases due to continuous trigger depression
Solution Approach 1:
The patent introduces a switch with multiple operational states (off state, on state, and locked-on state) that dynamically changes the control mechanism. The lock-on function allows the switch to maintain the motor driven state without continuous operator input, transforming the static continuous-pressure requirement into a dynamic state-holding mechanism that reduces operator burden while maintaining continuous motor operation.
2Reliability
If a lock-off mechanism is implemented to prevent erroneous motor activation, then safety is improved, but the ease of operation deteriorates due to additional switch operations required
Solution Approach 1:
The patent combines the lock-off safety function with the main power switch into a single integrated component. The switch simultaneously provides motor control and safety lock-off functionality, eliminating the need for separate safety mechanisms. The lock-on/lock-off operations are merged with the primary power activation/deactivation actions, maintaining safety while minimizing additional operational steps.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A rechargeable electric power tool (1) includes a battery pack (6) that is detachably provided on a housing (2) accommodating a motor (M) and that supplies electric power to the motor (M), and a tool (3) that is driven by the motor (M). A standby switch (15) and a lock-on switch (16) are arranged at the housing (2). The standby switch (15) is able to set the rechargeable electric power tool (1) to a standby state where the rechargeable electric power tool (1) waits for the motor (M) to be driven. The lock-on switch (16) is able to shift the rechargeable electric power tool (1) from the standby state to a state where the motor (M) is driven so as to keep the state where the motor (M) is driven.