Magnetic Sensor Switch for Motorized Screen Positioning
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Solution Overview
Problem
Existing devices for manually operating motorized screens, such as window coverings, lack compactness and user-friendly programming options, and often experience wear due to direct contact switching mechanisms, which can lead to reduced lifespan and increased risk of overloading.
Innovation Solution
The device incorporates a compact switching mechanism with a rotatable switching element and a microprocessor, utilizing a magnetic sensor and magnets for contactless operation, allowing for efficient conversion of pulling movements into electrical signals and enabling manual programming of screen positions without direct force transmission to the switch, thus preventing overloading and enhancing user-friendliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct contact switching mechanisms are used, then the device structure is simple, but wear occurs leading to reduced lifespan and increased risk of overloading
Solution Approach 1:
The patent replaces the mechanical direct contact switching mechanism with a magnetic sensing system. The Hall sensor detects the position of magnets on the rotation element to generate electrical signals without physical contact, eliminating wear and extending device lifespan while maintaining functional simplicity
Solution Approach 2:
The patent introduces a rotation element with magnets as an intermediary between the pull cord operation and the switch. This rotation element converts linear pulling motion into rotational motion, which then actuates the Hall sensor indirectly through magnetic field changes, preventing direct force transmission and potential overloading of the switching mechanism
2Volume of stationary object
If a rotatable switching element is used to convert pulling movement, then the switching means become more compact, but the switch mechanism becomes more complex
Solution Approach 1:
The patent uses a Hall sensor (magnetic field sensor) instead of complex mechanical switch mechanisms. The sensor detects changes in magnetic field position as the rotation element turns, generating electrical signals through non-contact sensing. This substitution dramatically reduces the volume of the switching means while the integrated circuit nature of the Hall sensor keeps the actual mechanical complexity low
Solution Approach 2:
The rotation element serves multiple functions: it converts linear pulling motion to rotational motion, positions magnets to actuate the Hall sensor, and can potentially encode multiple states through its rotation position. This multi-functionality reduces the need for separate components, maintaining compactness despite the sophisticated motion conversion mechanism
3Adaptability or versatility
If control means with microprocessor are added, then the possibilities and adaptability of the device increase, but the device complexity increases
Solution Approach 1:
The microprocessor-based control means serves multiple functions: it processes signals from the Hall sensor, controls the motorized drive, enables manual programming of screen positions, and can implement various operating modes. This multi-functionality justifies the increased complexity by providing versatile adaptability across different application scenarios without requiring multiple separate systems
Solution Approach 2:
The control means with microprocessor enables automatic functions such as remembering programmed screen positions and automatically executing them based on sensor input. The system serves itself by autonomously processing control logic, reducing the need for complex manual intervention mechanisms while enhancing adaptability to different user needs
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
The solution results in a more compact, durable, and user-friendly device that allows for efficient manual operation and programming of screen positions, reducing wear and enhancing safety by preventing overloading, while also enabling diverse applications in motorized transmission systems.
Implementation Method 1
the switch comprises a sensor and the switching element comprises a number of associated signal generators. The switching means take a contactless form... the switch comprises a magnetic sensor and the switching element comprises a number of magnets
Data Source
AI summary
A motorized drive of a window covering provided with a device for manually operating the motorized drive comprising a housing to be attached to the window covering with a pull cord and a push button for manual operation. A switch converts pulling movements on the pull cord into first electrical signals for the motorized drive.Controls are configured to save a setting value associated with a current position of the window covering in a data memory after receiving second electrical signals from the push button.A method for saving setting values associated with different positions of the window covering provided with the motorized drive comprising the steps of saving a current position by manual operation of the pull cord and/or the push button.