Wireless Terminal Cover Electrode Corrosion Prevention
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Solution Overview
Problem
Corrosion of electrodes in wireless communication terminal devices occurs when the cover body is detached, causing contact failure due to exposure to sebum or salt from fingers.
Innovation Solution
The device features projection pieces on the inner face of the cover body that project higher than the electrodes, preventing finger contact and reducing corrosion, with a rib and hook piece configuration to maintain pressure contact between terminals and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the cover body is made detachable for battery replacement, then ease of maintenance is improved, but the electrodes are exposed to finger contact causing corrosion
Solution Approach 1:
The projection pieces act as an intermediary protective element between the finger and the electrodes. When the cover body is detached, the projection pieces extend beyond the electrode surfaces to prevent direct finger contact with the electrodes, thereby preventing corrosion while allowing the cover body to remain detachable for battery replacement
Solution Approach 2:
The projection pieces are pre-formed on the inner face of the cover body before attachment. This preliminary structural feature ensures that when the cover body is detached, the electrodes are already protected from finger contact, preventing corrosion before it can occur
2Reliability
If the projection pieces are formed on the inner face of the cover body, then electrode corrosion is prevented, but device complexity increases
Solution Approach 1:
The projection pieces are integrated into the cover body structure itself, merging the protective function with the existing cover body. This combining approach prevents electrode corrosion without requiring separate protective components, thereby minimizing the increase in device complexity
Data Source
AI summary
A wireless communication terminal device according to the present invention comprises a main body which has a built-in electronic component, a casing which houses the main body, a cover body which is detachably attached to the casing, an antenna for wireless communication which is mounted on the cover body, a pair of electrodes which are disposed on the inner face of the cover body and connected to the antenna, a pair of terminals which are disposed on the main body and make contact with the pair of electrodes, and at least two projection pieces which are formed on the inner face of the cover body near the pair of electrodes as well as on both sides with the pair of electrodes interposed therebetween and project higher than the surfaces of the pair of electrodes.