Segmented Waterproof Cover for Rechargeable Electric Tool Battery
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Solution Overview
Problem
Existing rechargeable electric tools face challenges in achieving compact size while maintaining effective waterproofing due to the design of battery covers that are not tightly attached, leading to poor sealing performance and increased size requirements for turning operations.
Innovation Solution
A rechargeable electric tool design featuring a waterproof cover with two divided covers that slide and couple, incorporating a coupling mechanism and seal members to ensure tight sealing without the need for a turning operation space, allowing for compactness and improved waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a battery cover is attached to the outside of the battery pack by retaining a nail with the flange of the handle housing, then the battery cover can be easily installed, but the sealing performance between the handle housing and the battery cover becomes poor
Solution Approach 1:
The battery cover is divided into two separate covers that can be independently attached to the handle housing. This segmentation allows each cover to be securely retained by nails engaging with flanges, providing both easy installation and reliable sealing performance through the distributed attachment points and seal members positioned between the divided covers and the housing.
2Ease of operation
If space is assured between the inner face of the battery cover and the battery pack to prevent turning operation problems, then the battery cover can rotate freely, but the battery cover becomes larger and the size of the rechargeable electric tool increases
Solution Approach 1:
By dividing the battery cover into two separate covers, the patent eliminates the need for a large internal turning space. Each divided cover can be independently positioned and secured to the handle housing, allowing for compact design while maintaining operational ease through the simplified attachment mechanism that does not require rotation.
3Ease of manufacture
If the battery cover is not tightly attached to the handle housing, then the installation is simple, but rainwater can infiltrate through the gap between the battery pack and the housing
Solution Approach 1:
The battery cover is segmented into two covers that are independently attached to the handle housing using nails and flanges. This segmentation creates multiple sealing interfaces rather than a single large gap, allowing for effective waterproofing through distributed seal members while maintaining simple installation procedures.
Solution Approach 2:
A seal member made of rubber is introduced as an intermediary element between the divided battery covers and the handle housing. This seal member fills the gaps created by the segmented cover design, preventing rainwater infiltration while allowing the covers to be easily installed and securely retained by the nail-flange mechanism.
Data Source
AI summary
The present invention provides a rechargeable electric tool in which a battery pack as a power supply slides in a battery holder formed in an end part of a housing. A bag-shaped waterproof cover covering the battery pack including a coupling part between the battery holder and the battery pack is formed by two divided covers which are separated to the front and rear sides in a slide attachment direction of the battery pack. Between the two divided covers, a coupling mechanism can be moved to a coupling position or a coupling cancelling position. The coupling position is a position in which the divided covers are coupled to each other in an attached state where the coupling part and the battery pack are covered. The coupling cancelling position is a position in which coupling of the divided covers is cancelled.