Integrated Power Tool Switch PCB Layout for Simpler Assembly
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Solution Overview
Problem
The complexity and high cost of integrated electronic switches in hand-held electric tools lead to tedious assembly, necessitating a simpler structure and assembly method.
Innovation Solution
An integrated electronic switch design featuring a circuit board with a sensing module and control module on one side, multiple switching elements on the other, and a heat dissipation element to manage heat generated by the switching elements, along with a housing that accommodates the circuit board and includes a heat conduction element for efficient heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control circuit and power switch circuit are integrated on the same PCB board, then the functions of on/off and speed regulation are achieved at the same time, but the structure becomes complex and assembly becomes tedious
Solution Approach 1:
The circuit board is divided into two distinct surfaces: the first side surface accommodates the sensing module and control module, while the second side surface houses the switching elements. This spatial segmentation allows each module to be independently positioned and managed, reducing assembly complexity while maintaining multi-functionality.
Solution Approach 2:
The patent utilizes the third dimension (z-axis) by placing different functional modules on opposite sides of the circuit board. This dimensional arrangement allows the sensing/control modules and switching elements to coexist without interfering with each other, effectively reducing structural complexity while preserving all required functions.
2Power
If multiple switching elements are integrated on the circuit board, then power control functions are enhanced, but heat generation increases requiring additional heat dissipation structures
Solution Approach 1:
The heat dissipation element is extracted as a separate functional component from the circuit board assembly. It is specifically positioned on the second side surface to directly manage heat from the switching elements, allowing power control enhancement while independently addressing the heat generation issue through dedicated thermal management.
Solution Approach 2:
A heat conduction element is introduced as an intermediary component between the switching elements and the heat dissipation element. This mediator efficiently transfers heat generated by the high-power switching elements to the heat dissipation structure, enabling enhanced power control while managing thermal effects through a specialized thermal conduction pathway.
3Ease of manufacture
If the sensing module and control module are disposed on the first side surface, then assembly is simplified, but heat dissipation path for switching elements becomes longer
Solution Approach 1:
The circuit board is segmented into two functional surfaces: the first side surface for sensing and control modules (facilitating simple assembly), and the second side surface for switching elements with integrated heat dissipation structures (minimizing heat dissipation path). This segmentation resolves the contradiction by allowing assembly simplicity and efficient heat dissipation to occur in different spatial zones.
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 simplifies the assembly process, reduces the complexity of the integrated electronic switch, and enhances heat dissipation, thereby improving the operational efficiency and reliability of hand-held electric tools.
Implementation Method 1
a heat conduction element configured to transmit heat generated on the multiple switching elements to the heat dissipation element is disposed between the heat dissipation element and the multiple switching elements
Data Source
AI summary
An integrated electronic switch includes an input unit and a circuit board. The input unit is configured to receive a drive signal output by a user. A sensing module for sensing the drive signal transmitted from the input unit, and a control module electrically connected to the sensing module are disposed on the circuit board, where the sensing module and the control module are disposed on a first side surface of the circuit board.