Battery Attachment Lock Hole Cover for Foreign Matter Protection
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Solution Overview
Problem
The existing battery attachment apparatuses for electric tools are prone to malfunctions due to the intrusion of foreign matter and static electricity through the wall-hanging lock hole, especially as they have been miniaturized, which compromises the internal electronic components.
Innovation Solution
A battery attachment apparatus with a cover member that closes the lock hole from within the case, supported by a mounting portion, to prevent foreign matter and static electricity from entering, and is designed for easy and reliable mounting to enhance product reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lock hole is formed to establish communication between exterior and interior of the case for wall-hanging function, then the ease of operation (wall-hanging capability) is improved, but foreign matter and static electricity can enter the interior causing malfunctions
Solution Approach 1:
The lock hole is segmented into two functional zones: an exterior communication portion that allows wall-hanging screw insertion, and an interior closing portion that is sealed by a cover member. This segmentation enables the lock hole to simultaneously provide wall-hanging capability while preventing foreign matter and static electricity from entering the interior.
Solution Approach 2:
A cover member is introduced as an intermediary element that closes the interior portion of the lock hole. This cover member acts as a barrier that prevents direct communication between the exterior and interior of the case, thereby blocking the harmful factors while maintaining the wall-hanging function through the exterior portion.
2Volume of moving object
If the battery attachment apparatus is reduced in size for miniaturization, then the productivity and portability are improved, but the vulnerability to foreign matter and static electricity intrusion increases
Solution Approach 1:
The lock hole structure is segmented with a dedicated closing portion in the interior that is sealed by the cover member. This segmentation allows miniaturization of the overall apparatus while maintaining a protective barrier against foreign matter and static electricity, as the cover member can be proportionally scaled down with the apparatus.
Solution Approach 2:
The cover member functions as a thin sealing element that closes the interior lock hole portion. This thin film-like structure provides effective protection against foreign matter and static electricity intrusion while occupying minimal space, thus enabling apparatus miniaturization without compromising reliability.
3Reliability
If the cover member is added to close the lock hole interior, then the protection against foreign matter and static electricity is improved, but the device complexity increases
Solution Approach 1:
The cover member is merged with the lock hole structure, where the lock hole is designed with both an exterior communication portion and an interior closing portion. The cover member closes the interior portion and integrates with the overall lock hole configuration, providing protection without requiring a completely separate sealing system.
Solution Approach 2:
The cover member serves multiple functions: it closes the interior lock hole portion to prevent foreign matter and static electricity intrusion, maintains the structural integrity of the case, and works in conjunction with the wall-hanging screw mechanism. This multi-functionality reduces the need for additional separate protective components.
Data Source
AI summary
An electric tool battery is detachably attached to a battery attachment apparatus. The battery attachment apparatus has a case as an exterior portion thereof, including a lock hole establishing communication between the exterior and interior of the case to allow an external lock member to be locked. Further, the battery attachment apparatus has a cover member closing the opening of the lock hole from within the case, and a mounting portion to which the cover member is mounted and which is set on an inner surface of the case.