Overlapping Weld Marks for Developing Device Blade Fixation
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Solution Overview
Problem
Conventional blade units in developing devices often have weld marks that lack sufficient fixing strength, leading to insecure attachment of the blade to the supporting member, which can result in inadequate regulation of the developer layer thickness on the developing roller.
Innovation Solution
The blade unit employs overlapping weld marks, specifically formed using a fiber laser or YAG laser, to create a combined weld mark that securely fixes the blade to the supporting member, ensuring better attachment and reduced risk of force application on the blade during contact with the developing roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple weld marks are formed along the blade to join it to the supporting member, then the blade can be attached to the supporting member, but the fixing strength may be insufficient and the blade may not be securely fixed
Solution Approach 1:
Adjacent weld marks are designed to overlap with each other, merging into a combined weld mark that spans across the blade. This merging of multiple weld marks creates a continuous weld structure that provides sufficient fixing strength to securely attach the blade to the supporting member, resolving the contradiction between having multiple weld marks and achieving secure fixation.
2Strength
If weld marks are spaced apart along the blade, then the blade can be welded to the supporting member at multiple locations, but the spaced-apart configuration may not provide enough continuous support
Solution Approach 1:
The weld marks transition from a spaced-apart one-dimensional arrangement to an overlapping configuration that creates a two-dimensional combined weld mark. This dimensional change allows the weld marks to provide both multiple attachment points and continuous support across the blade, simultaneously achieving weld strength and structural stability.
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 overlapping weld marks enhance the blade's fixation to the supporting member, providing a more secure attachment and reducing the risk of developer layer thickness irregularities, thus improving the blade's ability to regulate the developer layer effectively.
Implementation Method 1
controlling a fiber laser to irradiate a first laser beam onto first portion of a blade to form a first weld mark welding the blade to a supporting member; and controlling the fiber laser to irradiate a second laser beam onto a second portion of the blade to form a second weld mark further welding the blade to the supporting member
Data Source
AI summary
Aspects include an apparatus, a blade assembly, and a method for manufacturing the apparatus with the blade assembly. The apparatus may include a developer carrier for carrying developer and a blade assembly. The blade assembly may include a blade disposed adjacent to the developer carrier and configured to regulate an amount of developer on the developer carrier. The blade may include a plurality of weld marks joining the blade to the supporting member. Each of the plurality of weld marks may overlap with an adjacent one of the plurality of weld marks. Together the weld marks may form a combined weld mark that extends in a direction that the blade extends.