Leaf Spring Pressing Portion for Optical Member Assembly
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Solution Overview
Problem
The existing light scanning apparatuses face issues with chipping, cracking, and degradation of reflecting mirrors due to contact with leaf springs during assembly, leading to reduced light intensity and image quality.
Innovation Solution
A light scanning apparatus design that includes a leaf spring with a pressing portion and an abutment portion, where the pressing portion moves onto the optical member only after the leaf spring is engaged, preventing direct contact with the mirror edge during attachment and maintaining a gap to avoid stress on the mirror edge, thus preventing chipping and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the leaf spring presses the mirror edge portion to maintain positioning, then the mirror is securely held, but chipping, cracking, and degradation occur on the mirror edge
Solution Approach 1:
A buffer member (elastomer material) is introduced between the leaf spring and the mirror edge portion. This intermediary absorbs the pressing force from the leaf spring, preventing direct contact that causes chipping and cracking, while still maintaining the mirror's positioning stability through the buffer's elastic properties
Solution Approach 2:
The pressing force parameter is modified by introducing the buffer member, which changes the force transmission characteristics. The buffer elastomer material provides a softer, more compliant force transmission that maintains positioning while preventing stress concentration on the mirror edge
2Stability of the object's composition
If the leaf spring directly contacts the mirror to provide pressing force, then the mirror is securely positioned, but light intensity is reduced due to powders and fine fragments on the mirror
Solution Approach 1:
The buffer member serves as a mediator that prevents direct contact between the leaf spring and the mirror surface. This eliminates the generation of powders and fine fragments that would otherwise adhere to the mirror and degrade light intensity, while maintaining positioning through the buffer's elastic support
Solution Approach 2:
The potential harm of the leaf spring contacting the mirror edge is converted into a benefit by using the buffer's elastic properties. The buffer elastomer material provides the necessary pressing force transmission while preventing the harmful contact that generates debris and degrades optical performance
3Ease of manufacture
If the leaf spring is deflected during assembly to compress the pressing portion, then the mirror is pressed into position, but stress is applied to the mirror edge causing damage
Solution Approach 1:
The buffer member is introduced as an intermediary during the assembly process. When the leaf spring is deflected to compress the pressing portion, the buffer absorbs and distributes the stress, preventing direct stress concentration on the mirror edge while still achieving proper mirror positioning
Solution Approach 2:
The buffer member provides beforehand cushioning by being pre-installed between the leaf spring and the mirror. This prior cushioning protects the mirror edge from stress during the assembly compression process, preventing chipping and cracking before they can occur
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 design effectively prevents chipping and cracking of the optical members during attachment and operation, ensuring consistent light intensity and improved image quality by avoiding contact between the leaf spring and the mirror edge, even when made of brittle materials like glass.
Implementation Method 1
a leaf spring including a pressing portion and a leaf spring engaging portion, the pressing portion being configured to press the optical member supported by the supporting portion
Data Source
AI summary
A light scanning apparatus, including: a light source; a deflector configured to deflect the light beam from the light source to scan a photosensitive member; an optical member configured to guide the light beam; a housing including a housing engaging portion and a supporting portion configured to support the optical member; a leaf spring including a pressing portion and a leaf spring engaging portion; and an abutment portion, wherein, in a process in which the housing engaging portion and the leaf spring engaging portion are moved from a second state in which the leaf spring engaging portion is not engaged with the housing engaging portion to a first state in which the leaf spring engaging portion is engaged with the housing engaging portion, the pressing portion is moved from the abutment portion to the optical member.