Magnetic Lamp Head Assembly with Hall Sensor Recognition
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Solution Overview
Problem
Existing hair removal devices using IPL technology are inconvenient to use due to the complexity of changing filters, lack of clear function identification after filter change, and potential safety hazards from high voltage exposure.
Innovation Solution
A pulse light hair removal device with a magnetic snap-fit assembly for easy lamp head replacement, Hall sensors for automatic function recognition, conductive springs and TVS/ESD protection for safe high voltage handling, and an accelerometer for intelligent light emission control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If filters are changed manually in existing devices, then different spectral bands can be achieved for various functions, but the operation becomes extremely inconvenient and complex
Solution Approach 1:
The device is segmented into modular components: a main body and interchangeable lamp head assemblies. Each lamp head assembly contains a specific filter configuration, allowing users to simply replace the entire lamp head module rather than manually changing individual filters. This segmentation transforms a complex filter-changing operation into a simple module replacement task.
Solution Approach 2:
The system incorporates sensors (such as Hall sensors or color sensors) that automatically detect which lamp head assembly is installed and autonomously identify the corresponding spectral band and function. This self-service capability eliminates the need for users to manually configure or identify filter settings, as the device automatically adapts to the installed lamp head.
2Adaptability or versatility
If multiple lamp head assemblies with different filters are used, then multiple functions can be achieved, but it becomes unclear which function corresponds to the installed filter
Solution Approach 1:
The device incorporates sensors that provide real-time feedback about the installed lamp head assembly. When a user attaches a lamp head, the sensor detects its identity (through magnetic signatures, color detection, or other identification mechanisms) and automatically displays or activates the corresponding function on the device interface. This feedback loop ensures users always know which function is active without needing to manually track filter configurations.
3Power
If traditional high voltage structures are used, then pulse light emission can be achieved, but high voltage may contact the skin causing safety hazards and discomfort
Solution Approach 1:
The high voltage generation and transmission components are completely extracted and isolated from the lamp head assembly that contacts the skin. The high voltage circuitry is confined to the main body of the device, separated from the treatment area by non-conductive materials and structural design. This extraction ensures that even if the device malfunctions, high voltage cannot reach the user's skin through the lamp head.
4Temperature
If rapid cooling is implemented for the lamp tube, then overheating can be prevented, but the device structure becomes more complex with multiple cavities and channels
Solution Approach 1:
The cooling structure merges multiple functions into a single integrated design. The same metallic components (such as the reflector cup or mounting structure) serve dual purposes: they provide structural support for the lamp tube while simultaneously acting as heat dissipation pathways. Cooling channels are integrated into existing structural elements rather than adding separate cooling components, thus achieving rapid cooling without significantly increasing 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
The device provides a safe, convenient, and efficient hair removal experience by simplifying filter changes, ensuring correct function identification, and preventing high voltage exposure, while also preventing unnecessary light emission.
Implementation Method 1
The connecting frame is equipped with multiple front mounting grooves, allowing the installation of varying numbers of magnets. Corresponding rear mounting grooves are set in the head shell, where magnets that adhere to those in the front mounting grooves can be installed.
Implementation Method 2
The PCBA board mounted on the lamp head assembly is equipped with Hall sensors corresponding to the position of the front mounting grooves on the connecting frame.
Implementation Method 3
The PCBA board also has conductive springs and a TVS/ESD protection module. One end of the conductive spring is in contact with the side of the light-guiding aluminum.
Implementation Method 4
An air suction cavity is formed between the lower mounting plate and the mainboard, while an air outlet cavity is formed between the lower mounting plate and the lower shell. The head cooling cavity communicates with both the air intake and air suction cavities. A cooling fan is placed between the air suction and air outlet cavities.
Implementation Method 5
The direction of force exerted by the reflector cup fixing spring on the reflector cup is opposite to that of the elastic lamp tube holder tightening the lamp tube, thus maintaining close contact between the reflector cup and the lamp tube.
Implementation Method 6
The lamp tube assembly includes a lamp tube and a reflector cup. The two ends of the elastic lamp tube holder are snap-fitted with the ends of the lamp tube.
Data Source
AI summary
An easy-to-use pulse light hair removal device comprising a main shell, a lamp tube assembly, a fixing frame, a PCBA board, a head shell, and a lamp head assembly; the lamp head assembly is detachably connected to the head shell, with a head cooling cavity corresponding between an upper fixing plate, a lower mounting plate, and the filter within the lamp head assembly, an air suction cavity formed between the lower mounting plate and the mainboard, and an air outlet cavity formed between the lower mounting plate and the lower shell, the mainboard at the ends corresponding to the lamp tube assembly is equipped with elastic lamp tube holders, and a reflector cup fixing spring is situated between the upper fixing plate and the lower mounting plate. The device facilitates the automatic recognition of interchangeable lamp heads, ensures comprehensive cooling of the entire device to maintain effective heat dissipation.