Patent ID: 9702357
Date: 2017-07-11
CPC Classifications: F04B,F04D,G06F,H05K

Claim:
1. A heat dissipation device, comprising: a substrate having a mounting surface; a first air current producing unit disposed on said mounting surface and including a fan body that is resilient and that has a mounting end mounted to said mounting surface, and an unrestrained end opposite to said mounting end, and a first magnetic component that is disposed on said fan body; and an electromagnet unit disposed on said mounting surface, and including an electromagnet that is spaced apart from said first air current producing unit, and that is configured to generate a varying magnetic field acting on said first magnetic component so as to cause said fan body to sway, thereby producing air current, wherein said first air current producing unit further includes a second magnetic component disposed on said fan body and spaced apart from said first magnetic component along a direction from said mounting end to said unrestrained end of said fan body; said heat dissipation device further comprising a second air current producing unit disposed on said mounting surface spaced apart from said first air current producing unit and said electromagnet, and including: a fan member that is resilient and that has a mounting end mounted to said mounting surface, and an unrestrained end opposite to said mounting end of said fan member, and a magnetic member that is disposed on said fan member at a position corresponding to said second magnetic component and that is acted upon by said second magnetic component when said fan body of said first air current producing unit sways so as to cause said fan member of said second air current producing unit to sway, thereby producing air current, wherein at least one of said fan body and said fan member has a first portion and a second portion that are respectively proximate to and distal from said mounting surface, said first portion having a weight per unit length in a direction from said mounting end to said unrestrained end heavier than that of said second portion.