Projector Fan Frame Slit Design for Vibration Isolation
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Solution Overview
Problem
Fan vibration in projectors affects heat dissipation efficiency and image quality, as existing designs fail to adequately mitigate the transmission of vibrations from the fan to the projection lens and optical engine.
Innovation Solution
A projector design featuring a fan frame with slits and a specific fixing mechanism that reduces vibration transmission, where the fan is sleeved in the frame, and the frame is fixed to a casing with screws passing through holes and slits, minimizing contact and vibration transfer to the casing and ultimately the projection lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fans are arranged in the projector to improve heat dissipation efficiency, then heat dissipation efficiency is improved, but fan vibration affects the quality of projecting image
Solution Approach 1:
The fan frame is divided into multiple independent fixing portions (first fixing portion and second fixing portion) with through holes and slits. This segmentation allows the structure to isolate vibration at different locations, preventing vibration transmission from the fan to the projection lens while maintaining heat dissipation functionality.
Solution Approach 2:
The fan frame combines rigid materials for structural support with slit designs that provide vibration isolation. The composite structure of solid frame material with void spaces (slits) creates a system that maintains mechanical strength for heat dissipation while reducing vibration transmission paths.
2Stability of the object's composition
If the fan frame is rigidly fixed to the casing, then structural stability is improved, but vibration transmits more to the projection lens
Solution Approach 1:
The fixing structure is segmented into multiple through holes and slits rather than a continuous rigid connection. This segmentation creates isolated fixing points that provide structural stability while interrupting the continuous vibration transmission path from the fan to the projection lens.
Solution Approach 2:
The slit structures act as intermediary elements between the fan frame and the casing. These slits serve as vibration isolation zones that mediate the connection, allowing structural attachment while blocking vibration transmission to the projection lens.
3Reliability
If more fixing components are added to reduce vibration, then vibration proof function is improved, but device complexity increases
Solution Approach 1:
The fan frame structure integrates multiple functions into a single component: it provides structural support for the fan, creates heat dissipation pathways through slits, and acts as a vibration isolation mechanism. This multi-functionality achieves vibration proof performance without adding separate fixing components.
Solution Approach 2:
The fan frame's own structure (with integrated through holes and slits) provides the vibration isolation function. The frame serves itself by incorporating vibration-proof features directly into its design, eliminating the need for additional external vibration isolation components.
Data Source
AI summary
A projector includes a fan, a fan frame, a first casing, a second casing and a projection lens. The fan is sleeved in the fan frame, wherein the fan frame comprises a first fixing portion having a first through hole, and two slits located at two opposite sides of the first fixing portion, an extension direction of the two slits is parallel to an extension direction of the first through hole, and a length of each of the two slits is greater than a depth of the first through hole. The first casing is fixed to the fan frame, wherein a first screw passes through the first through hole and is fixed to the first casing. The second casing is fixed to the first casing. The projection lens is fixed to the second casing.