Sphygmomanometer Cuff Wireless Charging via Induction
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Solution Overview
Problem
Conventional sphygmomanometers require a dedicated charging device and frequent terminal connections, leading to inefficiencies and reliability issues due to potential terminal degradation from water or dust exposure.
Innovation Solution
A sphygmomanometer with a power supply unit inside the cuff, utilizing a non-contact electromagnetic inductive charging method to charge a secondary battery, eliminating the need for terminal connections and allowing for miniaturization and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal for connection with the charging device is provided in the cuff, then the secondary battery can be charged, but the terminal may degrade through repeated connection and connection failure may occur if water or dust attaches to the terminal
Solution Approach 1:
The patent replaces the mechanical contact-based charging terminal with a non-contact electromagnetic induction charging system. The power reception unit uses a coil to receive power wirelessly from a power transmission unit, eliminating physical terminals that are susceptible to degradation from water, dust, and repeated connection cycles. This substitution of mechanical connection with electromagnetic field-based power transfer directly resolves the reliability issue caused by terminal degradation.
2Volume of moving object
If the battery is accommodated inside the cuff, then the sphygmomanometer can be miniaturized, but a dedicated charging device needs to be prepared and the charging device needs to be connected to the cuff every time the charging is carried out
Solution Approach 1:
The patent employs electromagnetic induction charging where the power reception unit (coil) in the cuff receives power wirelessly from a power transmission unit. This eliminates the need for physical connection between the charging device and cuff, allowing users to simply place the cuff near the charging device for power transfer. The miniaturized battery inside the cuff is charged without requiring complex connection operations, thus resolving the contradiction between miniaturization and ease of charging operation.
3Reliability
If much time and efforts are required when charging the battery, then the secondary battery can be charged, but this may increase the load on the user of the sphygmomanometer
Solution Approach 1:
The wireless electromagnetic induction charging system allows the cuff to be charged by simply placing it near the charging device without requiring physical connection or complex user operations. This significantly reduces the time and effort required for charging compared to traditional terminal-based charging methods, thereby reducing the operational load on users while maintaining reliable battery charging capability.
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
Enables simple, reliable, and efficient battery charging without the need for terminal connections, enhancing user convenience and measurement accuracy while preventing terminal degradation.
Implementation Method 1
The power reception unit is supplied with power through an electromagnetic inductive action from a power transmission unit arranged in a non-contact state with the power reception unit
Data Source
AI summary
A sphygmomanometer includes an expandable/contractable air bag supplied with air; a bag-shaped cover body for accommodating the air bag and for attaching the air bag to a site to be measured; an expansion and contraction mechanism for expanding and contracting the air bag; and a power supply unit arranged in the bag-shaped cover body. The power supply unit includes a battery for supplying driving power to the expansion and contraction mechanism, and a non-contact power reception unit for receiving power for charging the battery. The non-contact power reception unit is supplied with power through an electromagnetic inductive action from a non-contact power transmission unit arranged in a non-contact state with the non-contact power reception unit.