Cooling fan
OwnerHsin-Mao Hsiehinventor
Life of this patent
Estimating the term…
Abstract
A cooling fan has a housing having a recess defined therein and a seat formed on a bottom face thereof. A circuit board is secured on the seat of the housing. A coil has an opening defined therethrough and a bracket is provided beneath the coil to fix it on the circuit board. A sleeve, of which a first end is enclosed, is received in the opening of the coil and has a fastener formed at a second end thereof and engaged with the outer periphery of the coil. A collar is provided at a bottom face of the sleeve. A self-lubricating bearing is provided in the sleeve and on the collar. A rotor having a core is received in the bearing and inserted through the collar.
Claims3
A cooling fan comprising:
- a housing (10) having a recess (11) defined therein and a seat (12) forming a bottom face thereof;
- a circuit board (20) secured on said seat (12) of said housing (10);
- a coil (34) having an opening defined therethrough;
- a bracket (35) provided beneath said coil (34) to fix said coil (34) on said circuit board (20);
- a sleeve (31) with an enclosed first end and received in said opening of said coil (34), and having a fastener (33) formed at a second end thereof which is engaged with an outer side of said coil (34);
- a collar (50) provided at a bottom face of said sleeve (31);
- a self-lubricating bearing (60) provided in said sleeve (31) and on said collar (50);
- and
- a rotor (70) having a core (71) received in said bearing (60) and inserted through said collar (50), whereby the cooling fan can be assembled easily and produces negligible noise during operation.
Dependencies are inferred from the claim text.