Protective Cap Magnet Induction for Battery-Free Injection Power
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Solution Overview
Problem
Conventional injection devices face challenges such as battery corrosion and leakage during long-term storage, and require additional steps for electricity generation, making them less user-friendly and efficient.
Innovation Solution
An injection device with a removable cap containing a magnet that induces electrical current in a coil when detached, charging an energy storage apparatus and powering on-board equipment, eliminating the need for separate electricity generation steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a battery is provided to power on-board equipment during storage, then the equipment can be powered, but battery corrosion and leakage occur during long-term storage
Solution Approach 1:
The magnet is pre-positioned within the cap during manufacturing, and the electromagnetic induction mechanism is pre-configured. When the cap is removed during use, the magnet's movement relative to the coil automatically generates electricity without requiring preliminary battery installation or charging actions by the user.
Solution Approach 2:
The device generates its own power through the movement of the magnet during cap removal. The electromagnetic induction system converts the mechanical action of cap removal into electrical energy, making the system self-powered and eliminating the need for external batteries that could corrode or leak during storage.
2Use of energy by moving object
If separate electricity generation steps are required, then power can be generated, but user-friendliness and efficiency are reduced
Solution Approach 1:
The cap removal action is merged with the electricity generation process. The same mechanical motion used to remove the cap also drives the magnet through the coil to generate electrical power, combining two functions into one seamless action and eliminating separate steps.
Solution Approach 2:
The cap serves multiple functions: it protects the needle during storage and simultaneously acts as a trigger for power generation when removed. The magnet integrated within the cap transforms the protective cap into a multi-functional component that also initiates the electromagnetic induction process.
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
Enhances user-friendliness and efficiency by generating power during cap removal, reducing the need for additional operations and minimizing battery-related issues.
Implementation Method 1
when the removable cap is disengaged from the housing, the magnet moves with respect to the electrical coil such that electrical voltage is induced in the electrical coil and a current is generated
Data Source
Figure 1a~1b
Figure 2
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AI summary
An injection device comprising: a housing arranged to contain a liquid medicament or a medicament cartridge; an electrical coil arranged at the housing; a removable cap arranged to be removably engaged with an end of the housing; and a magnet arranged within the removable cap; wherein when the removable cap is disengaged from the housing, the magnet moves with respect to the electrical coil such that electrical voltage is induced in the electrical coil and a current is generated.