Handheld Power Tool Cover Deformation Correction
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Solution Overview
Problem
Existing concrete vibrators lack user-friendliness in terms of battery pack accessibility and operation, with issues related to cover deformation and foreign matter entry.
Innovation Solution
A handheld power tool design featuring a latch mechanism on the cover with correcting parts to address cover deformation, a movable part for cord management, and a brushless motor with control for constant speed operation, enhancing user interaction and tool functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery pack is detachably mounted to the handle housing with a latch structure, then the battery pack can be securely fixed, but the cover deformation prevents proper engagement and reduces user-friendliness
Solution Approach 1:
The correcting part applies a preliminary correcting force to counteract the inward deformation of the cover before the engagement part attempts to engage with the engaged part. This pre-compression ensures that the cover is in the correct position and orientation for successful engagement, preventing the deformation from interfering with the latch mechanism operation.
Solution Approach 2:
The correcting part acts as an intermediary element between the cover and the engaged part. It mediates the interaction by first correcting the cover's deformation through contact, then allowing the engagement part to properly engage with the corrected cover surface, ensuring reliable connection.
2Object-affected harmful factors
If the cover is made to cover the battery pack mount, then foreign matter entry is prevented, but the cover deformation causes improper closing and reduces sealing effectiveness
Solution Approach 1:
The correcting part applies a preliminary correcting force to counteract the inward deformation of the cover before the engagement part attempts to engage with the engaged part. This pre-compression ensures that the cover is in the correct position and orientation for successful engagement, preventing the deformation from interfering with the latch mechanism operation.
3Manufacturing precision
If the correcting part applies force to press the cover outward, then cover deformation is corrected, but additional force is required in the same direction as the latch engagement force
Solution Approach 1:
The correcting part performs the action of pressing the cover outward beforehand, during the closing motion, so that by the time the engagement part needs to engage with the engaged part, the cover is already in the correct position. This preliminary correction eliminates the need for additional force during the engagement phase.
4Ease of operation
If a movable part is provided for cord management, then user-friendliness is improved, but the device complexity increases
Solution Approach 1:
The movable part serves multiple functions: it can be opened to allow cord extraction, it can be pressed to form the opening part for cord passage, and it integrates into the existing cover structure. This multi-functionality justifies the added complexity by providing enhanced operational flexibility without requiring separate components.
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 design provides a user-friendly interface by correcting cover deformation, preventing foreign matter entry, and maintaining consistent motor speed, improving operational efficiency and user experience.
Implementation Method 1
The correcting part may be an elastic body
Data Source
AI summary
Provided is a user-friendly power tool. The power tool 1 comprises: a battery pack mount 2c to which a battery pack 4 can be attached and detached; and a cover 17 that can cover the battery pack 4, mounted on the battery pack mount 2c, and the battery pack mount 2c so as to allow opening and closing. The wall 23 of the battery pack mount 2c is provided with a correcting part 23a that is capable of correcting inward warping of both the left and right side surfaces of the cover 17, which are the longitudinal direction surfaces. The lower edge of the correcting part 23a has a rounded shape.