Image Formation Device Frame Rigidity and Substrate Positioning
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Solution Overview
Problem
In image formation devices with frames composed of metal and resin members, the difference in flexural rigidities leads to significant flexural deformation of the electric substrate, causing instability and misalignment.
Innovation Solution
The design incorporates a first frame with higher flexure rigidity and a second frame with lower flexure rigidity, where the electric substrate is secured to the first frame and extends over the second frame, using positioning and holding hooks to manage deformation and maintain accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the frame is composed of metal members and resin members, then the frame can be manufactured with ease and cost-effectiveness, but the flexural deformation of the electric substrate becomes large due to different flexural rigidities
Solution Approach 1:
The frame is divided into a first frame made of metal members and a second frame made of resin members, with the electric substrate extending across both frames. This segmentation allows each frame to be optimized for its material properties while sharing the load, reducing overall flexural deformation of the substrate.
Solution Approach 2:
The frame structure combines metal and resin materials with different flexural rigidities in a composite configuration. The metal first frame provides high rigidity support while the resin second frame provides complementary support, creating a composite structure that reduces substrate deformation compared to using either material alone.
2Reliability
If the electric substrate is secured to both metal member and resin member, then the electrical connections are established, but the flexural deformation of the electric substrate is caused due to difference of flexural deformation between resin member and metal member
Solution Approach 1:
The electric substrate is extended to span across both the metal first frame and resin second frame, creating a segmented support system. This allows the substrate to be secured at multiple points with different rigidity characteristics, maintaining electrical connections while distributing flexural stresses.
Solution Approach 2:
The structure utilizes the different flexural rigidity parameters of metal and resin materials strategically. By positioning the substrate to extend across both frames with different rigidities, the system leverages the high rigidity of metal for stable electrical connections while the resin frame absorbs some flexural deformation.
Data Source
AI summary
An image formation device is provided with an image formation unit configured to form an image on a recording sheet, a first frame arranged to support the image formation unit, a second frame connected to the first frame, flexure rigidity of the second frame being smaller than flexure rigidity of the first frame, an electric substrate electrically connected with the image formation unit. With the above configuration, the electric substrate is arranged to extend from the first frame to the second frame and is secured onto the first frame with the position on the first frame being adjusted.