Electronic Switch Module With Sliding Resistor for Lightweight Speed Gears
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Solution Overview
Problem
Existing electric tools require a large number of resistors for speed regulation, which hinders lightweight design and limits the number of adjustable gears due to the need for a resistor for each gear.
Innovation Solution
An electronic switch module with a variable resistor and a first resistor connected in series, where the variable resistor has multiple second resistors with different values, and a sliding resistance adjusting member connects to one or two second resistors to adjust resistance values, allowing for three gears with reduced resistor count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a resistor is arranged for each gear in existing electronic switch modules, then the number of adjustable gears increases, but the number of resistors increases proportionally, increasing product weight
Solution Approach 1:
The patent combines multiple resistance functions into a single integrated switch module. The switch module integrates multiple resistors with different resistance values and switching mechanisms into one component, allowing multiple gear adjustments without proportionally increasing the number of separate resistor components. This merging approach reduces overall component count and product weight while maintaining multiple adjustable gears.
Solution Approach 2:
The switch module is designed as a multi-functional component that can provide multiple resistance values and gear adjustments through a single device. The module contains multiple resistors with different resistance values (e.g., first resistor with R1, second resistor with R2) and can switch between them to provide multiple gears, making one component serve multiple functions that previously required separate components.
2Measurement precision
If multiple resistors are used for each gear adjustment, then the resistance regulation precision improves, but the device complexity increases
Solution Approach 1:
The patent merges multiple resistor elements and switching mechanisms into a single integrated switch module. Instead of having separate resistors and switching mechanisms distributed throughout the circuit, all resistance regulation components are combined into one module, reducing device complexity while maintaining precise resistance control through internal switching between different resistor elements.
Solution Approach 2:
The switch module internally segments the resistance regulation function into discrete resistor elements (first resistor, second resistor, etc.) that can be independently controlled. This segmentation allows precise resistance regulation by selecting specific resistor combinations, while the external appearance remains as a single integrated component, reducing overall device complexity.
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 design reduces resistor loss and facilitates lightweight design by providing three adjustable gears with fewer resistors, enhancing user experience and product design.
Implementation Method 1
the variable resistor and the first resistor are connected in series to form a voltage-dividing resistor unit
Implementation Method 2
the resistance adjusting member slides along the conductive member, and the second end of the resistance adjusting member is electrically connected with one or two second resistors
Data Source
AI summary
The invention is suitable for the technical field of electronic circuits, and provides an electronic switch module and an electric tool. The electronic switch module comprises a variable resistor and a first resistor, wherein the variable resistor and the first resistor form a voltage-dividing resistor unit, and the output end of the module is arranged on a connecting line between the variable resistor and the first resistor; one end of the voltage-dividing resistor unit is connected with a power supply, and the other end is grounded; the variable resistor comprises a plurality of second resistors with different resistance values, a conductive member, a first end and a resistance value adjusting member. When the resistance adjusting member slides along the conducting member, the two second resistors provide three different resistance values, so that the loss of the resistors is reduced, and the lightweight design of the product is facilitated.