Protective case for fan
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[0046]The protective case for fan according to the second embodiment of the present invention can further include one set of two second raised ribs 212 formed on a second set of two diagonally opposite corners of the closed bottom portion 21. Each of the second raised ribs 212 includes a third section 2121 and a fourth section 2122 extended closely along the sidewall portion 23, and the fourth section 2122 is connected to the third section 2121 at a right angle.
[0047]Spaces left between the sidewall portion 23 and faces of the second raised ribs 212 facing toward the sidewall portion 23 are defined as two third retaining portions 27, which are sized for engaging with another two diagonally opposite lower corners of the fan frame 51 of the larger fan 5, so that the faces of the second raised ribs 212 facing toward the sidewall portion 23 are abutted on an inner face of the fan frame 51 of the larger fan 5 at another two diagonally opposite lower corners thereof. More specifically, th...
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