Elastic Member Pressing CCD Mounting Board to Prevent Warping
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Solution Overview
Problem
In image reading devices, the CCD mounting board can warp due to temperature variations, leading to displacement of the image formation position of the lens and potential damage to the electrical connections, which affects the quality of the read image.
Innovation Solution
An image reading device design that includes a support plate, a CCD sensor, an insulating member, and an elastic member with a main body, first and second arms, and a protrusion portion, where the CCD mounting board is pressed toward the support plate using the elastic member, preventing warping and maintaining the image formation position, and ensuring secure electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the CCD mounting board is pressed toward the support plate using the elastic member, then the warping of the CCD mounting board is prevented and the image formation position stability is improved, but the complexity of the device structure increases due to the additional elastic member with multiple components
Solution Approach 1:
The elastic member is divided into distinct functional segments: a main body portion for pressing, first and second arms for engagement, and a protrusion portion for applying force. This segmentation allows each part to perform its specific function efficiently while maintaining overall structural stability and preventing CCD mounting board warping.
Solution Approach 2:
The elastic member utilizes elastic deformation to dynamically adapt to temperature variations and prevent warping. The first and second arms can flexibly engage with the support plate edges, allowing the structure to maintain stability under varying thermal conditions while the protrusion portion continuously applies pressing force.
2Ease of manufacture
If the elastic member is designed with first and second arms bent at acute angles for engagement with the support plate, then the ease of assembly is improved, but the manufacturing precision requirements increase due to the complex bending geometry
Solution Approach 1:
The first and second arms are bent at acute angles to form curved engagement portions that can elastically deform during assembly. This curvature allows the arms to flexibly engage with the support plate edges through elastic deformation, simplifying the assembly process while the precise acute angle geometry ensures proper positioning and force distribution.
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 prevents the CCD mounting board from warping and maintains the stability of the image formation position, enhancing the quality of the read image and preventing electrical connection damage, while facilitating assembly and disassembly.
Implementation Method 1
an elastic member having a pair of arms holding the edge of the support plate is engaged with the support plate from behind (the side opposite to the insulating member) the CCD mounting board, in which the CCD mounting board is pressed toward the support plate with a protrusion portion formed on the elastic member
Data Source
AI summary
An image reading device according to the present disclosure includes a support plate, a CCD sensor, an insulating member, a CCD mounting board and an elastic member. The CCD sensor is arranged on one surface of the support plate. The insulating member is arranged on the other surface of the support plate. The elastic member fixes the CCD mounting board to the support plate. The elastic member includes: a main body portion; a first arm and a second arm which are bent with respect to the main body portion and which have a first engagement portion and a second engagement portion that are engaged with the edges of the support plate; and a protrusion portion which is provided in the main body portion and which presses the CCD mounting board toward the support plate. The tip end portion of the first arm is bent at an acute angle.