Battery Pack Latch Mechanism With Sloped Actuator
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Solution Overview
Problem
Existing battery packs for power tools lack a secure and efficient mechanism for attaching and detaching the battery pack, which can lead to water infiltration and theft, and do not provide a user-friendly interface for easy operation.
Innovation Solution
A battery pack with a housing featuring a latch mechanism that includes an actuator and a latch member with a gradually decreasing slope actuating surface, allowing for secure engagement and disengagement with the power tool, and a biasing mechanism to maintain the latch in position, enhancing waterproofing and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latch mechanism is added to secure the battery pack, then security and waterproofing are improved, but device complexity increases
Solution Approach 1:
The latch mechanism is integrated into the battery pack housing structure, combining the security function with the existing housing rather than adding a separate complex assembly. The actuator and latch member are incorporated into the housing walls, merging multiple functions into a unified structure that provides security without proportionally increasing overall device complexity.
2Ease of operation
If a latch mechanism with actuator is added, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The actuator is designed with a self-service mechanism where the user can easily press or manipulate it to engage or disengage the latch. The actuator's design allows intuitive operation without requiring complex sequences or additional tools, enabling the user to securely attach or detach the battery pack through a simple single-action input.
3Ease of operation
If the actuating surface has a gradually decreasing slope, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The actuating surface incorporates a gradually decreasing slope, changing the geometric parameter of the surface from flat to inclined. This slope variation provides mechanical advantage during actuation, reducing the force required by the user while maintaining manufacturability through standard machining or molding processes that can accommodate gradual slope changes.
4Reliability
If a biasing mechanism is added to maintain latch position, then reliability is improved, but device complexity increases
Solution Approach 1:
The biasing mechanism automatically maintains the latch in the engaged position without requiring continuous user intervention. It provides self-service by using spring force or elastic deformation to keep the latch member pressed against the mating surface, ensuring reliable connection while preventing accidental disengagement, all without adding complex control systems.
Data Source
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AI summary
A battery pack (14) including a housing having a first end, a second end, and a longitudinal axis that extends between the first end and the second end, electrical terminals positioned within the housing and configured to engage and electrically couple with electrical terminals of a power tool, and a latch mechanism including an actuator (204) and a latch member (212) that is spaced apart from the actuator. The actuator has a distal end that is positioned adjacent the first end of the housing, a proximal end that is spaced apart from the distal end, and an actuating surface that extends between the distal end and the proximal end. The actuating surface has a gradually decreasing slope between the distal end and the proximal end.