Capsule Medical Device Short-Circuit Prevention Member
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Solution Overview
Problem
Capsule medical devices with button batteries face challenges in preventing short-circuits between the negative and positive electrodes, which can lead to electrical connection issues and reduced device performance during operation.
Innovation Solution
Incorporating a short-circuit prevention member with an annular shape and a conductive unit that electrically connects the electrodes, while providing insulation and preventing exposure of the positive electrode, ensures secure electrical connections between batteries and prevents short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If button batteries are used in capsule medical devices, then compact power supply is achieved, but short-circuit risk between electrodes increases
Solution Approach 1:
An insulating member with an aperture is introduced as an intermediary component between the positive and negative electrodes. This insulating member covers the positive electrode while exposing the negative electrode through its aperture, thereby preventing direct contact between electrodes and short-circuiting while maintaining electrical connection functionality.
Solution Approach 2:
The electrode contact structure is segmented into distinct regions: the insulating member separates the positive electrode coverage area from the negative electrode exposure area. This segmentation allows independent control of insulation and electrical connection functions, preventing short-circuits while ensuring reliable power supply.
2Reliability
If electrodes are exposed for electrical connection, then power supply is secured, but short-circuit hazard increases
Solution Approach 1:
The insulating member provides localized insulation coverage specifically over the positive electrode region while leaving the negative electrode exposed through its aperture. This local differentiation of insulating and conductive zones enables simultaneous achievement of electrical connection reliability and short-circuit prevention.
Solution Approach 2:
The insulating member acts as a spatial mediator that selectively manages electrode exposure: it covers the positive electrode to prevent harmful short-circuits while allowing the negative electrode to remain exposed for necessary electrical connections.
3Reliability
If insulating material is added to prevent short-circuits, then safety is improved, but device complexity increases
Solution Approach 1:
The insulating member performs multiple functions simultaneously: it provides electrical insulation over the positive electrode, structurally positions the electrode assembly, and defines the aperture for negative electrode exposure. This multi-functionality reduces the need for additional separate components, thereby limiting complexity increase.
Solution Approach 2:
The insulating member combines several functions into a single component: insulation, structural support, and electrode positioning. By merging these functions into one element rather than using separate components, the design minimizes the increase in device complexity while achieving reliable short-circuit prevention.
Data Source
AI summary
A capsule medical device includes: a casing having a capsule shape; a plurality of batteries, each having a first face, a second face, a first electrode and a second electrode; and a short-circuit prevention member, wherein the short-circuit prevention member includes an insulating member having an annular shape, covering the portion of the second electrode, and formed with an aperture from which the first electrode is exposed, an outer diameter of the annular shape is smaller than an inner diameter of the casing, and larger than an outer diameter of the battery, and a diameter of the aperture is larger than a diameter of the first electrode, and smaller than a diameter of the portion of the second electrode.