Pumps – Motor driven – Pump within rotary working member
Reexamination Certificate
2001-07-03
2003-03-04
Walberg, Teresa (Department: 3742)
Pumps
Motor driven
Pump within rotary working member
C417S423100, C310S091000
Reexamination Certificate
active
06527522
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a heat dissipation fan structure, and more particularly to a heat dissipation fan structure which may be rotated more rigidly and stably. When the impeller of the heat dissipation fan structure is rotated, it is able to detect if the impeller is operated and rotated normally.
2. Description of the Related Art
A conventional heat dissipation fan structure in accordance with the prior art shown in
FIG. 1
comprises a housing
90
containing therein a circuit board
91
, and a stator
92
. An impeller
93
has a central shaft
94
pivoted and rotated in the shaft tube
96
of the stator
92
. A permanent magnet ring
95
is mounted on the impeller
93
, and may be induced with the stator
92
, so as to drive the impeller
93
to rotate.
However, the winding and assembling process of the coils of the stator
92
is more difficult, thereby increasing the cost of fabrication. In addition, the entire conventional heat dissipation fan structure has a thicker construction due to existence of the stator
92
, so that it cannot satisfy the light and thin design.
Further, the central shaft
94
of the impeller
93
is pivoted and rotated in the shaft tube
96
of the stator
92
. Thus, the impeller
93
cannot be rotated smoothly and stably. In addition, it is unable to detect if the impeller
93
is operated and rotated normally.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a heat dissipation fan structure which can be worked and assembled conveniently, and can reduce the cost of fabrication.
A secondary objective of the present invention is to provide a heat dissipation fan structure which may be rotated more rigidly and stably.
A further objective of the present invention is to provide a heat dissipation fan structure, wherein it is able to detect if the impeller is operated and rotated normally.
In accordance with the present invention, there is provided a heat dissipation fan structure, including a base plate provided with an air outlet which is provided with a bottom plate. The bottom plate is provided with a drive circuit control member. The base plate is provided with a plurality of poles of an even number. Each pole is wound with a coil. An insulating layer is mounted between the pole and the coil. Poles having the same polarity are connected by the same connecting wire. An impeller is pivoted and rotated on the bottom plate. The impeller has a plurality of blades that may drive air to flow. A magnet ring is mounted on peripheral edges of the blades of the impeller, and may be induced with the poles wound with coils.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 6208512 (2001-03-01), Goldowsky et al.
patent: 6246140 (2001-06-01), Horng
patent: 6309190 (2001-10-01), Chen
patent: 2001/0043869 (2001-11-01), Horng
patent: 2002/0090307 (2002-07-01), Cheng
Fastovsky Leonid M
Larson & Taylor PLC
Walberg Teresa
Yen Sun Technology Corp.
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