Trigger-Controlled Drilling Tool for Uniform Hole Depth
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Solution Overview
Problem
Conventional drilling tools face challenges in forming uniform drill holes due to vibrations and dust, which affect the accuracy of depth measurement, and require complex wiring and additional sensors, increasing costs and complexity.
Innovation Solution
A drilling tool with a controller that sets and maintains a stop condition based on user operations, allowing for uniform depth drilling without specialized sensors or complex wiring, using a trigger switch to control the drilling process and select from multiple modes for varying drilling needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a distance sensor is used to calculate drilling depth, then drilling depth can be controlled, but vibrations and dust cause inaccurate measurements and depth variations
Solution Approach 1:
The patent removes the distance sensor from the system entirely. Instead of using optical/electronic sensing that is vulnerable to vibrations and dust, the invention uses a purely mechanical approach where the trigger switch directly controls the motor based on physical displacement of the drill tool, eliminating measurement accuracy issues caused by environmental factors.
Solution Approach 2:
The drill tool's own mechanical structure serves the measurement and control function. The trigger switch is mechanically linked to the drill's movement, so the tool's own displacement automatically actuates the switch at the desired depth without requiring external sensors or complex electronic measurement systems.
2Ease of operation
If a distance sensor and control unit are added to control drilling depth, then depth control is achieved, but construction becomes complex with wiring and additional components
Solution Approach 1:
The control function is merged with the existing trigger mechanism. The trigger switch, already present for motor control, is repurposed or integrated with a stop condition detection mechanism. This combines the activation and depth control functions into a single existing component, avoiding additional control units, wiring, and complex electronic systems.
Solution Approach 2:
The trigger switch serves multiple functions: it activates the motor for drilling and simultaneously detects the stop condition when the drill reaches the preset depth. This multi-functionality eliminates the need for separate depth sensing and control components, simplifying the overall device construction.
3Extent of automation
If a distance sensor is installed to enable depth control, then drilling operations can be automated, but manufacturing costs increase due to additional sensor components
Solution Approach 1:
The invention replaces expensive, fragile electronic distance sensors with a simple, inexpensive mechanical trigger switch. The trigger switch is a basic mechanical component that is cheap to manufacture, durable, and requires no complex electronics, thereby significantly reducing manufacturing costs while maintaining automation capability.
Solution Approach 2:
The patent substitutes electronic/optical sensing systems with a mechanical sensing mechanism. The trigger switch uses direct mechanical contact or displacement to detect drilling depth, replacing sophisticated electronic sensors with simple mechanical principles that are cheaper to manufacture and more reliable in harsh drilling environments.
Data Source
AI summary
A drilling tool includes: a drive source; a bit attachment portion to which an end bit is attachable; a power transmission portion configured to apply a motive force to the end bit attached to the bit attachment portion; an operation portion switchable between an ON-state and an OFF-state by a manual operation and configured to receive a setting operation for setting a stop condition; and a controller configured to set the stop condition based on the setting operation, and to start driving of the drive source in response to a first switching operation for switching the operation portion from the OFF-state to the ON-state. In a state where the stop condition is set, even when the operation portion is in the ON-state, the controller stops driving of the drive source in response to the stop condition being met while the drive source is being driven.