Compact Speed Control Switch With Sliding Terminal
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Solution Overview
Problem
Conventional speed control switches have large swing and complex structures, making precise speed regulation and operation inconvenient due to their size and complexity.
Innovation Solution
A compact speed control switch design featuring a base with a switch assembly, a PCB board, and a trigger assembly that includes a push handle and drive mechanism, allowing precise control of motor speed by sliding a terminal along a contact plate, with a bending angle between 30-50 degrees for optimal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional speed control switches use step speed regulation or point contact, then the structure is simpler, but the swing of the switch is too large and precise speed regulation cannot be achieved
Solution Approach 1:
The patent replaces the conventional mechanical point contact switch mechanism with a sliding terminal mechanism that moves along a contact plate. This substitution allows for continuous speed regulation rather than discrete steps, achieving precise speed control while maintaining a relatively simple structure. The sliding terminal makes continuous contact with different positions on the contact plate, enabling fine adjustment of motor speed.
Solution Approach 2:
The patent introduces a movable sliding terminal that can dynamically adjust its position along the contact plate. This dynamic element allows the switch to transition between different contact points smoothly, providing continuous speed regulation capability. The sliding mechanism enables the switch to adapt to different speed requirements by changing its contact position in real-time.
2Ease of operation
If conventional speed control switches are designed with larger components, then the structure is more stable, but the size of the switch becomes large and operation becomes inconvenient
Solution Approach 1:
The patent employs a compact nested arrangement where the sliding terminal is integrated within the housing structure, and the contact plate is positioned efficiently within the available space. The trigger assembly is nested within the housing, with the push rod and spring mechanism compactly arranged. This nesting approach minimizes the overall volume of the switch while maintaining all necessary functional components.
Solution Approach 2:
The patent utilizes the depth dimension of the housing to accommodate components vertically rather than spreading them out horizontally. The contact plate is positioned vertically within the housing, and the sliding terminal moves along this vertical dimension. The trigger mechanism is arranged in the depth direction, allowing the switch to achieve a compact footprint while maintaining operational stability.
3Volume of moving object
If conventional speed control switches use a compact design, then the size is reduced, but the structure becomes complex and operation becomes inconvenient
Solution Approach 1:
The housing serves multiple functions: it provides structural support, contains the sliding terminal mechanism, houses the contact plate, and protects internal components. The trigger assembly integrates the push rod, spring, and actuating mechanism into a single compact unit that performs both actuation and return functions. This multi-functionality reduces the number of separate components needed, simplifying the overall structure while maintaining compact dimensions.
Data Source
AI summary
A speed control switch includes a base. An upper end of the base is provided with a switch assembly. A side of the base is provided with a PCB board and a slide terminal. The PCB board is provided with a first contact plate. The slide terminal is slidably connected with the first contact plate. The base is provided with a trigger assembly for driving the slide terminal to slide along the first contact plate and to close the switch assembly. The speed control switch can regulate the speed of a motor precisely. The structure is compact to reduce the size of the switch, so that it is convenient for operation.