Blower Casing Claw Fixation for Resin Support
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Solution Overview
Problem
In the miniaturization of electronic devices, such as notebook personal computers, there is a challenge in securely fixing resin supports to metal plates due to limited space, making it difficult to cut and bend projections for enhanced strength, especially in blowers where wider air channels are required.
Innovation Solution
A casing design featuring a metal first plate with a screw hole and a resin support extending from it, including a claw portion that engages with the support to prevent turning and coming off, allowing for secure fixation even in constrained areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If projections are cut and bent upward from the plate to increase fixation strength, then the strength of fixation between the support and the plate is improved, but the area required for arranging the support on the plate increases
Solution Approach 1:
The invention transitions from a two-dimensional planar projection structure to a three-dimensional claw-shaped structure that extends vertically from the plate surface. The claw portion bends upward and engages with the support in the vertical dimension, providing fixation strength without requiring additional horizontal area on the plate surface.
Solution Approach 2:
The claw portion is nested within the support structure, with the claw extending upward from the plate and being received by or engaging with the support. This nested arrangement allows the fixation mechanism to be contained within the vertical space rather than requiring additional horizontal space on the plate.
2Volume of moving object
If the area for support arrangement is reduced for miniaturization, then the device size is reduced, but the ability to create secure projections for fixation is weakened
Solution Approach 1:
The invention resolves the contradiction by utilizing the vertical dimension for the claw portion's engagement with the support. This allows the plate to maintain a small horizontal footprint for miniaturization while the claw extends vertically to provide sufficient engagement length and fixation strength with the support.
Solution Approach 2:
The claw portion concentrates the fixation function in a localized vertical region rather than requiring a large horizontal area. The local quality of the bent claw structure provides the necessary mechanical engagement and fixation strength in a compact space, enabling both miniaturization and secure fixation.
Data Source
AI summary
A casing includes a first plate made of a metal, a support made of a resin, and a second plate fixed to the support. The first plate includes a flat plate portion, a through hole passing through the flat plate portion, and a claw portion extending upward from an edge of the through hole. A portion of the support is located in the through hole. The support covers a portion of the claw portion such that the support is prevented from turning and from coming off in an upward direction. The claw portion is defined by a portion of the first plate extending along a longest line segment inside the through hole in a plan view being bent upward from the flat plate portion. This enables the claw portion to have a great length even in a small area of the first plate to securely fix the support to the first plate.