Resin Regulating Blade Attachment with Pre-Bonding Warping Force
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Solution Overview
Problem
In developing devices, the regulating blade made of resin faces challenges in maintaining a consistent SB gap due to thermal contraction and varying straightness, leading to uneven developer distribution, which is difficult to adjust post-bonding.
Innovation Solution
A method involving the application of an adhesive to the attachment portion, followed by a force adjustment to set the SB gap within a predetermined range before bonding, ensuring the regulating blade is attached in a non-contact manner to maintain the desired gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the regulating blade is made of resin and molded using resin, then the device complexity is reduced and ease of manufacture is improved, but the manufacturing precision of the coating-amount regulating surface deteriorates due to thermal contraction variation
Solution Approach 1:
The patent applies a warping force to the regulating blade before bonding it to the development frame member. This preliminary action pre-distorts the blade to compensate for the expected thermal contraction that will occur after bonding, ensuring that the coating-amount regulating surface maintains its straightness despite the resin material's thermal properties.
Solution Approach 2:
The patent changes the physical state of the regulating blade by applying a warping force that alters its shape parameters. This force-induced deformation compensates for the thermal contraction characteristics of the resin material, allowing the blade to maintain proper straightness after bonding despite being made of molded resin.
2Area of stationary object
If the length of the regulating blade in the lengthwise direction is increased, then the area of the coating-amount regulating surface is increased to handle wider sheets, but the manufacturing precision of the straightness deteriorates
Solution Approach 1:
For longer regulating blades that span wider areas, the patent applies a warping force during the bonding process to pre-correct any straightness deviations. This preliminary action ensures that even though the blade is long and susceptible to thermal contraction variations, the coating-amount regulating surface maintains adequate straightness across the entire length.
3Device complexity
If the regulating blade is bonded to the development frame member without adjustment, then the assembly is simplified, but the SB gap varies due to component and assembly tolerances
Solution Approach 1:
The patent incorporates a preliminary adjustment step where a warping force is applied to the regulating blade during the bonding process. This allows operators to compensate for component and assembly tolerances, ensuring that the SB gap between the regulating blade and development rotary member falls within the predetermined range before the adhesive sets.
4Manufacturing precision
If a force for warping the regulating blade is applied during bonding, then the straightness of the coating-amount regulating surface is improved, but the ease of operation deteriorates due to additional adjustment steps
Solution Approach 1:
The warping force is applied as part of the bonding process itself, combining two necessary actions (bonding and straightness adjustment) into a single operational sequence. This integration reduces the perceived complexity by performing the adjustment preliminarily during the bonding step rather than as a separate post-bonding operation.
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
This method effectively maintains the SB gap within a predetermined range, ensuring consistent developer distribution and addressing the issues of thermal contraction and straightness variations.
Implementation Method 1
a configuration that attaches, with an adhesive, the regulating blade made of resin and having low precision of straightness of a regulating portion to an attachment portion of a development frame member made of resin
Data Source
AI summary
A force for adjusting a relative position of a regulating blade relative to a development rotary member supported by a development frame member is applied to the regulating blade so that a gap between the development rotary member and the regulating blade when attached to an attachment portion falls within a predetermined range in a rotational axis direction of the development rotary member in a state that the regulating blade is separated from the attachment portion with an adhesive applied. The regulating blade is attached, with the adhesive, to the attachment portion with the adhesive applied so that the gap between the development rotary member and the regulating blade with the force applied falls within the predetermined range.