Drop-Prevention Pouch for Cordless Power Tool Battery Packs
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Solution Overview
Problem
Existing tethering solutions for cordless battery-powered power tools are inadequate, as they can be uncomfortable, fail to prevent battery pack separation, and result in bulky and expensive pouches with loose ends that catch on clothing or equipment, and do not effectively prevent tool drops.
Innovation Solution
A drop-prevention pouch designed for cordless power tools with a flexible conduit and drawstring that snugly fits over the battery pack, featuring a pouch floor and sidewall with a chamber to securely hold the battery pack, and an elasticized design that restricts the pouch opening to prevent separation, along with a retaining cord and cord lock to maintain the battery pack's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cord is wrapped around the handle of the drill to prevent dropping, then the tool can be tethered to prevent accidental drops, but the cord gets in the user's way and is uncomfortable because the user's hand often rests on the cord
Solution Approach 1:
The invention extracts the tethering function from the handle area and relocates it to the battery pack area. The pouch is attached to the battery pack rather than wrapping around the handle, removing the interfering cord from the user's hand rest area while maintaining tethering reliability.
Solution Approach 2:
The invention segments the tool system into two tethering components: the pouch attached to the battery pack and the tether attached to the pouch. This segmentation allows the tethering function to be separated from the handle area, eliminating the comfort issue while preserving security.
2Reliability
If a cord lock, connector, or knot is required to secure the cord tightly to the handle, then the cord can be securely tethered, but an additional item interferes with the user's comfort and use of the drill
Solution Approach 1:
The invention merges the tethering function into the pouch structure itself. The pouch includes integrated features (drawstring, cord lock, retaining strap) that combine multiple functions into a single component, eliminating the need for separate cord locks or connectors on the handle.
Solution Approach 2:
The pouch serves multiple functions: it secures the battery pack, provides tethering attachment, and includes integrated cord lock and retaining features. This multi-functionality eliminates the need for additional separate components, reducing overall device complexity.
3Reliability
If battery pouches with straps are designed to secure the battery pack, then the battery pack can be retained, but the pouches tend to be bulky and expensive to manufacture
Solution Approach 1:
The pouch opening is made elasticized, allowing it to dynamically expand for battery insertion and contract to securely retain the battery pack. This dynamic feature provides reliable retention without requiring bulky rigid structures or multiple straps.
Solution Approach 2:
The pouch is constructed as a flexible shell with an elasticized opening, providing secure battery retention through material elasticity rather than bulky rigid structures. This thin-film approach reduces pouch size and manufacturing complexity while maintaining retention reliability.
4Reliability
If the pouch opening is made elasticized to snugly receive the battery pack, then the battery pack is securely retained, but the pouch may be difficult to install or remove
Solution Approach 1:
The elasticized opening is designed to be stretched outward before battery insertion, creating a preliminary expanded state that facilitates easy installation. After the battery is inserted, the opening naturally contracts to secure the battery pack, providing both easy installation and secure retention.
Data Source
AI summary
A drop-prevention pouch for a cordless power tool has a battery pack that defines a battery pack perimeter. The drop-prevention pouch includes a pouch floor and a sidewall extending transversely from the pouch floor and having a sidewall rim portion defining a pouch opening. The pouch floor and the pouch sidewall define a chamber sized to receive the battery pack when the battery pack is attached to the cordless power tool. The pouch sidewall defines a window opening aligned to permit the user to view a feature on the battery pack. A flexible conduit extends along the sidewall rim portion. A drawstring extends through the flexible conduit and is capable of restricting the pouch opening to be smaller than the battery pack perimeter, thereby preventing the drop-prevention pouch from being removed from the battery pack when the battery pack is attached to the cordless power tool.