Electric Tool Battery Pack Rail Pressing Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cordless electric tools experience rattling and increased gaps between the battery pack and housing, leading to reduced dust resistance and aesthetic issues due to the sliding mount mechanism.
Innovation Solution
Incorporating a pressing member, such as an elastic member, into the rail system to ensure the battery pack and housing come closer together during mounting, minimizing gaps and preventing rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressing member is added to suppress rattling, then reliability is improved, but device complexity increases
Solution Approach 1:
The pressing member is integrated into the rail part structure, combining the guiding function and pressing function into a single component. The rail part includes a pressing surface that directly contacts the battery pack, eliminating the need for separate pressing mechanisms while suppressing rattling.
Solution Approach 2:
The rail part's pressing surface automatically presses the battery pack during the mounting process itself. The act of sliding the battery pack along the rail part inherently activates the pressing action through the play in the rail part dimensions, requiring no additional actuation mechanisms.
2Reliability
If the battery pack is pressed with an elastic member, then rattling is suppressed, but a gap may form between housing and battery pack deteriorating appearance and dust resistance
Solution Approach 1:
The pressing action is applied locally at the mounting interface between the battery pack and housing through the rail part's pressing surface. This localized pressing ensures contact and gap elimination at the critical interface without causing deformation or gaps in other areas of the battery pack or housing.
Solution Approach 2:
The rail part serves as an intermediary component between the housing and battery pack. It transmits the pressing force from the housing to the battery pack during mounting, ensuring proper contact while guiding the battery pack into position, thereby preventing gaps and maintaining dust resistance.
3Ease of manufacture
If the rail part is made with play in margin for size tolerance, then ease of manufacture is improved, but mounting precision deteriorates causing gaps and rattling
Solution Approach 1:
The rail part is designed with intentional dimensional play or clearance in specific directions to accommodate manufacturing tolerances. This parameter adjustment allows easy assembly while the pressing surface compensates for the resulting gaps through elastic deformation or mechanical pressing action.
Solution Approach 2:
The rail part incorporates flexibility or elastic elements that allow dynamic adjustment during mounting. The pressing member can elastically deform or adjust its position to accommodate tolerance variations, ensuring consistent pressing force and mounting precision despite variations in manufacturing dimensions.
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 solution effectively suppresses rattling, enhances dust resistance, and maintains a sleek appearance by ensuring a snug fit between the battery pack and the housing, while improving mounting operability.
Implementation Method 1
a rail part, which is configured to guide mounting of the battery pack to the battery attachment part, is provided with a pressing member that is configured to press the battery pack and the housing such that they come close to each other
Data Source
AI summary
When a battery pack is mounted to a battery attachment part, the battery pack is slid in a horizontal direction (a direction substantially perpendicular to an upper-lower direction) with respect to the housing, e.g., along a long longitudinal direction of a battery-side rail part, such that tool-side rail parts of the battery attachment part are introduced into engaging recess portions of the battery pack. Thereby, the elastic members are fitted and compressed in the battery-side rail parts and the tool-side rail parts, so that the elastic members press upwards the battery-side rail part (e.g., the battery pack) and press downwards the tool-side rail parts (e.g., the housing). That is, the elastic members press the battery pack and the housing such that they come close to each other.