Arcuate Battery Lock Mechanism for Secure Retention and Easy Ejection
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Solution Overview
Problem
Existing hand-held work tools for cutting concrete and stone face challenges in efficient battery insertion, secure battery retention, and easy battery ejection, which affects operational convenience and tool performance.
Innovation Solution
A battery lock mechanism featuring a rotatably supported locking member with an arcuate leading edge and a recess on the battery, along with resilient members to enhance contact pressure and facilitate ejection, addresses the challenges of secure retention and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is used to secure the battery in position, then battery retention is improved, but battery removal becomes difficult
Solution Approach 1:
The locking member is designed to rotate between a locked position (where it engages the battery recess) and an unlocked position (where it releases the battery). This dynamic movement allows the mechanism to provide secure retention during operation while enabling easy removal when needed, resolving the contradiction between reliable retention and ease of operation.
Solution Approach 2:
The resilient member automatically urges the locking member into the locked position when the battery is inserted, providing self-latching functionality. This eliminates the need for separate locking actions while maintaining secure retention, and the user can simply press the release button to remove the battery, greatly simplifying the removal process.
2Reliability
If friction between the locking member and battery surface is increased to improve holding effect, then battery retention is improved, but resistance to rotation increases
Solution Approach 1:
The leading edge portion is given an arcuate form that matches the curvature of the battery recess surface. This curved geometry ensures continuous contact between the locking member and battery surface during rotation, maintaining friction-based holding effect while allowing smooth rotational movement. The matching arcuate profiles reduce point-contact stress and distribute friction forces along the curved interface, preventing excessive rotation resistance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The battery lock mechanism provides improved ease of battery insertion and secure retention, reducing vibration and enhancing tool stability, while also facilitating easy battery ejection for convenient maintenance.
Implementation Method 1
at least one resilient member arranged to be compressed by the battery when received in the battery compartment to push back thereon
Implementation Method 2
the locking member is spring biased towards the locking position
Data Source
Figure 1~2A
Figure 2B~2C
Figure 3A~3B
AI summary
A battery compartment battery lock mechanism (700) comprising a locking member (710) rotatably supported on a shaft (720) and comprising a leading edge portion (750) arranged to enter a recess (760) formed in a battery (220) to lock the battery in position, The leading edge portion (750) has an arcuate form with a curvature corresponding to that of a circle segment with radius (740) corresponding to the distance from the leading edge portion (750) to the center of the shaft (720) The recess (760) formed in the battery (220) comprises a surface (770) arranged to engage the leading edge portion (750), wherein the surface (770) has an arcuate form to match that of the leading edge portion (750). The invention further comprises an electrically powered hand-held work tool comprising such a battery lock mechanism.