A stator core 35 includes a core back 352 of a substantially annular shape. At a radially outer end portion of the core back 352 four teeth 351 are arranged radially. At the teeth 351, a coil 371 is formed by winding a magnet wire 37 via an insulator 36. A first insulator 361 configuring a lower hal
A stator core 35 includes a core back 352 of a substantially annular shape. At a radially outer end portion of the core back 352 four teeth 351 are arranged radially. At the teeth 351, a coil 371 is formed by winding a magnet wire 37 via an insulator 36. A first insulator 361 configuring a lower half of the insulator 36 includes a first core back insulating portion 3611, 1 first teeth insulating portion 3612, and a first cylindrical portion 3613. A hook portion 4 is formed at the first core back insulating portion 3611 at radially outer side, and between the teeth 351. The magnet wire 37 extracted from the coil 371 is hooked on the hook portion 4. The magnet wire 37 hooked on the hook portion 4 is lead the magnet wire 37 around the hook portion 4 as a base, and is soldered to a land 381 formed above a circuit board 38.
대표청구항▼
The invention claimed is: 1. A brushless motor comprising: an armature comprising a core back, a plurality of teeth extended from the core back, said plurality of teeth being arranged in a radial manner centering about a central axis, an insulator made of an insulating material covering at least a
The invention claimed is: 1. A brushless motor comprising: an armature comprising a core back, a plurality of teeth extended from the core back, said plurality of teeth being arranged in a radial manner centering about a central axis, an insulator made of an insulating material covering at least a small portion of an outer surface of the plurality of teeth, and a coil formed by winding a magnet wire around each of the plurality of teeth via the insulator; a rotor portion including a rotor magnet generating between the armature a torque centering about the central axis, the rotor portion rotating relatively with respect to the armature centering about the central axis; a base portion supporting the armature in a fixed manner; and a circuit board arranged between the armature and the base portion, and configured thereon a circuit controlling a rotation of the rotor portion; wherein the insulator includes a hook portion formed at a space between adjacent teeth when seen from the axial direction; the magnet wire extracted from the coil is hooked on the hook portion and is further extended and electrically connected to the circuit board at the end of the magnet wire, the magnet wire being bent at the hook portion toward a direction different from a direction in which the magnet wire extends off the coil; and a tension applied to a portion of the magnet wire between the hook portion and the end is smaller than that applied to a portion of the magnet wire between the coil and the hook portion. 2. The brushless motor according to claim 1, wherein an end portion of the magnet wire hooked on the hook portion is extracted in a radially outward direction from the hook portion and is electrically connected to the circuit board. 3. The brushless motor according to claim 1, wherein the circuit board is connected to the armature via the insulator. 4. The brushless motor according to claim 1, wherein the insulator is made of a resin material by an injection molding. 5. The brushless motor according claim 1, wherein the insulator includes a core back insulating portion covering an outer side surface of the core back, the hook portion is formed at the core back insulating portion. 6. The brushless motor according to claim 1, wherein the core back insulating portion includes a cylindrical portion centering about the central axis in a direction away from the core back in an axial direction parallel to the central axis, the hook portion is formed at the cylindrical portion. 7. The brushless motor according to claim 1, wherein the insulator includes a teeth insulating portion covering the teeth, wherein the hook portion is formed at the teeth insulating portion. 8. The brushless motor according to claim 1, wherein the insulator comprises a first insulator attached to the core back and each tooth from a side of the base portion, and a second insulator attached to the core back and each tooth from a side opposite from the base portion. 9. The brushless motor according to claim 8, wherein the hook portion is formed at the first insulator. 10. The brushless motor according to claim 8, wherein the hook portion is formed at the second insulator. 11. The brushless motor according to claim 1, wherein the magnet wire is electrically connected via a conductive pin affixed to the insulator to the circuit board at the end of the magnet wire. 12. The brushless motor according to claim 1, wherein the hook portion includes a portion which is bent. 13. A fan unit using the brushless motor according to claim 1, wherein the rotor portion comprises a plurality of blades rotating, intaking air from one end in the axial direction and thereby generating an air flow directed to the other end in the axial direction; the plurality of blades are surrounded in the radial direction by a housing forming a pathway for the air flow; and the housing and the base portion are connected by the supporting leg portion. 14. A fan unit using the brushless motor according to claim 1, wherein the rotor portion comprises: a plurality of blades arranged at the rotor portion at radially outer side thereof in the circumferential manner centering about the central axis, and a housing formed such as to exhaust in the radially outward direction air taken in in the axial direction. 15. The brushless motor according to claim 1, wherein the magnet wire is soldered to the land along the circuit board. 16. The brushless motor according to claim 1, wherein a portion of the magnet wire between the hook portion and the end is freely extended.
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이 특허에 인용된 특허 (4)
Terada Takahiko,JPX ; Onishi Hiroshi,JPX, Base and solvent-decomposed molding of thermosetting resin and aliphatic polyester.
Horng, Alex; Huang, Chun-Yuan; Cheng, Chung-Ken; Nguyen, Nguyen; Narasimhan, Susheela, Fan device with improved speed control module and plural fan system constructed thereby.
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