Control Relay Push-Rotate Wheel for Safe Parameter Adjustment
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Solution Overview
Problem
Industrial control relays face limitations in adjusting multiple functional parameters due to limited space on the housing, leading to cumbersome digital adjustment methods, increased risk of unintended configuration changes, and exposure to dangerous voltages when manually operating keys.
Innovation Solution
A push-rotate-wheel operating member is integrated within the housing, accessible only through a small slot, allowing parameter adjustments using a screwdriver, which reduces the risk of unintended changes and maintains a safe distance from hazardous voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple potentiometers are provided on the housing surface for adjusting functional parameters, then the number of adjustable parameters increases, but the housing surface area required increases beyond standard dimensions
Solution Approach 1:
Multiple functional parameters are adjusted through a single integrated operating member (push-rotate wheel) rather than requiring separate potentiometers for each parameter. The operating member can perform multiple functions: rotating to adjust threshold values, pushing to navigate menus, and combining both actions for comprehensive parameter control, thereby consolidating what would traditionally require multiple separate controls into one compact element.
Solution Approach 2:
The operating member is designed as a multi-functional control element that can adjust different functional parameters through different operations (rotation for value adjustment, pushing for selection/navigation). This universal control mechanism allows a single element to replace what would traditionally require multiple specialized controls, enabling adjustment of multiple parameters including threshold values, hysteresis, and other relay settings within the standard housing dimensions.
2Adaptability or versatility
If push-buttons are provided on the housing surface for digital parameter adjustment, then the number of adjustable parameters increases, but the risk of unintended configuration changes increases
Solution Approach 1:
A tool-operated mechanism (screwdriver interface) serves as an intermediary between the user and the parameter adjustment function. The operating member requires insertion of a tool to effect any changes, creating a deliberate intermediate step that prevents accidental activation. This intermediary mechanism maintains reliability by ensuring that only intentional actions with the proper tool can modify parameters, while still allowing full digital adjustment capability through the same interface.
3Ease of operation
If keys are made larger for easier manual operation, then the ease of operation improves, but the number of keys that can fit on the housing decreases
Solution Approach 1:
The traditional mechanical push-button system is replaced with a tool-operated rotary interface. Instead of requiring multiple discrete keys that would need to be physically large for easy finger operation, the system uses a single operating member that interfaces with a tool (screwdriver). This substitution allows for precise control with a compact interface, as the tool provides mechanical leverage and precision without requiring large key surfaces, thereby maintaining both ease of operation and the ability to adjust multiple parameters.
4Ease of operation
If the operating member is accessible from the front surface for manual operation, then the ease of operation improves, but the exposure to dangerous voltages increases
Solution Approach 1:
The tool (screwdriver) acts as an intermediary that provides both mechanical operation capability and electrical isolation. The tool interface allows the user to operate the relay parameters without direct contact with the housing or internal circuitry, maintaining safe distance from dangerous voltages while still enabling easy parameter adjustment through the tool's handle and shaft.
Solution Approach 2:
The operating member is extracted from direct accessibility on the front surface and repositioned to be accessible only through a slot that allows tool insertion from the rear or side. This extraction removes the direct exposure pathway while maintaining operational capability through the tool interface, thereby separating the user's hands from the hazardous voltage environment while preserving ease of operation.
Data Source
Figure 1~2
Figure 3~4
AI summary
Control relay (1), having a housing (2) and functional circuitry (12) covered by the housing (2) to perform the function of the control relay (1), further having a user interface system (13), said user interface system (13) comprising a directional input unit (14) having an operating member (16) and operable to receive at a point in time an input specifying one of a selection of functional parameters and to communicate the specified functional parameters to the functional circuitry (12), wherein the said input unit (24) is operable to receive said functional parameter in response to a user operation of rotating an pushing the operating member (26), wherein the operating member (26) is covered by the housing (2), wherein the operating member (26) is configured to be operated by the user by means of a tool (18), wherein the housing (2) has an operational opening (17) giving access for the tool (18) to the operating member (26).