Abstract: A connection structure applied to a fan for connecting a metal member with a shaft by means of laser. The connection structure includes a metal member and a shaft. The metal member has an opening, a first side and a second side. The opening is formed through a center of the metal member. The shaft is inserted in the opening. An outer circumference of the shaft is welded with a circumference of the opening on the first side to form at least one first welding section between the contact sections of the outer circumference of the shaft and the circumference of the opening on the first side. The first welding section is connected between the outer circumference of the shaft and the circumference of the opening on the first side to integrally connect the metal member with the shaft. The connection structure applied to the fan can lower cost.

Abstract: A fan vibration absorbing structure includes a bearing cup and a vibration absorbing element. The bearing cup includes a first section, a second section and a bearing holding hole. The first and the second section are connected end-to-end to enclose a receiving space therein, which communicates with the bearing holding hole. The vibration absorbing element is fitted between the first and the second section. With the fan vibration absorbing structure included in a fan, it is able to largely reduce the vibration occurred during fan operation.

Abstract: An oil return structure for fan includes a base, a bearing, a retaining ring and a rotor. The base has a bearing cup internally defining a receiving space for receiving the bearing therein. The bearing has a centered and axially extended shaft hole. The retaining ring is located at a front end of the bearing and has a central hole. The rotor includes a hub and a shaft. The shaft is extended through the central hole of the retaining ring into the shaft hole of the bearing, and is provided with an annular groove corresponding to the retaining ring. Oil in the bearing flowing to the annular groove during fan operation is centrifugally pulled out of the shaft and then caught by the retaining ring, from where the oil returns to the bearing. Therefore, loss of oil from the bearing is largely reduced to ensure extended fan service life.

Abstract: A fan vibration absorbing structure includes a bearing cup and a vibration absorbing element. The bearing cup includes a first section, a second section and a bearing holding hole. The first and the second section are connected end-to-end to enclose a receiving space therein, which communicates with the bearing holding hole. The vibration absorbing element is fitted between the first and the second section. With the fan vibration absorbing structure included in a fan, it is able to largely reduce the vibration occurred during fan operation.

Abstract: A base structure for cooling fan includes a seat, a circuit board and a motor assembly. The seat has an inner side served as a supporting surface. The circuit board has a first side attached to a top of the supporting surface and an opposite second side having a plurality of electronic elements provided thereon. The motor assembly includes a plurality of stacked silicon steel plates located on the circuit board and above the electronic elements. With the first side of the circuit board being attached to the supporting surface of the seat and the electronic elements on the second side of the circuit board being located in spaces between the motor assembly and the circuit board, more silicon steel plates can be stacked in the motor assembly to enable upgraded motor working efficiency and reduced electric current needed by the cooling fan to operate.

Abstract: A laser-welded joint structure between insulation frame and bearing cup of fan includes a base having a bearing cup and a stator having at least one insulation frame. The insulation frame includes a sleeve portion defining a bore axially extending therethrough. The sleeve portion is provided on an inner wall surface with at least one pressing section that radially projects into the bore to press a lower side against an upper end of the bearing cup and a bearing received therein. A portion of at least one lateral side of each pressing section that is in contact with the upper end of the bearing cup is melted by laser beam to form a laser-welded joint, so that the insulation frame and the bearing cup are integrally connected together at reduced manufacturing cost and have increased structural strength. A method of forming the laser-welded joint structure is also disclosed.

Abstract: A connection structure applied to a fan for connecting a metal member with a shaft by means of laser. The connection structure includes a metal member and a shaft. The metal member has an opening, a first side and a second side. The opening is formed through a center of the metal member. The shaft is inserted in the opening. An outer circumference of the shaft is welded with a circumference of the opening on the first side to form at least one first welding section between the contact sections of the outer circumference of the shaft and the circumference of the opening on the first side. The first welding section is connected between the outer circumference of the shaft and the circumference of the opening on the first side to integrally connect the metal member with the shaft. The connection structure applied to the fan can lower cost.

Abstract: An oil return structure for fan includes a base, a bearing, a retaining ring and a rotor. The base has a bearing cup internally defining a receiving space for receiving the bearing therein. The bearing has a centered and axially extended shaft hole. The retaining ring is located at a front end of the bearing and has a central hole. The rotor includes a hub and a shaft. The shaft is extended through the central hole of the retaining ring into the shaft hole of the bearing, and is provided with an annular groove corresponding to the retaining ring. Oil in the bearing flowing to the annular groove during fan operation is centrifugally pulled out of the shaft and then caught by the retaining ring, from where the oil returns to the bearing. Therefore, loss of oil from the bearing is largely reduced to ensure extended fan service life.

Abstract: A base structure for cooling fan includes a seat, a circuit board and a motor assembly. The seat has an inner side served as a supporting surface. The circuit board has a first side attached to a top of the supporting surface and an opposite second side having a plurality of electronic elements provided thereon. The motor assembly includes a plurality of stacked silicon steel plates located on the circuit board and above the electronic elements. With the first side of the circuit board being attached to the supporting surface of the seat and the electronic elements on the second side of the circuit board being located in spaces between the motor assembly and the circuit board, more silicon steel plates can be stacked in the motor assembly to enable upgraded motor working efficiency and reduced electric current needed by the cooling fan to operate.

Abstract: A laser-welded joint structure between insulation frame and bearing cup of fan includes a base having a bearing cup and a stator having at least one insulation frame. The insulation frame includes a sleeve portion defining a bore axially extending therethrough. The sleeve portion is provided on an inner wall surface with at least one pressing section that radially projects into the bore to press a lower side against an upper end of the bearing cup and a bearing received therein. A portion of at least one lateral side of each pressing section that is in contact with the upper end of the bearing cup is melted by laser beam to form a laser-welded joint, so that the insulation frame and the bearing cup are integrally connected together at reduced manufacturing cost and have increased structural strength. A method of forming the laser-welded joint structure is also disclosed.

Abstract: The present invention is to provide a cable strain-relief member for a PC fan, comprising a pressing part, two locking parts at both ends of the pressing part, and two releasing parts at the two joint portions between the pressing part and the locking parts. Accordingly, the strain-relief member can be set at a rib of the fan frame to firmly bind lead wires on the rib of the fan frame to prevent from being swung left and right, or being shaken up and down, to be loosened by an external force. Besides, the strain-relief member can be released for easy maintenance and packing of the fan according to the actual need.

Abstract: The present invention relates to a heat sink assembly structure having at least a heat sink fastening member combined with at least a heat sink. Each heat sink fastening member has a V-shaped protrusion, a slot, and an elastic lock member. The elastic lock member has a V-shaped cross sectional structure. The V-shaped protrusion of a first heat sink is combined tightly in the slot of a second heat sink for assembling the heat sink and for forming a V-shaped slot. The assembled heat sink is fixed in a base by adding a solder into the V-shaped slot.

Abstract: The present invention relates to a heat sink assembly structure, using at least a heat sink fastening member to combine with at least a heat sink, characterized in that; the heat sink fastening member has a V-shaped protrusion, a slot, and an elastic lock member; the elastic lock member has a V-shaped cross sectional structure, by means of the V-shaped protrusion combined tightly in the slot for assembling the heat sink and for forming a V-shaped slot; the assembled heat sink is fixed in a base by adding a solder into the V-shaped slot.

Abstract: A structure for assembling a heat sink assembly uses at least an interlocking device to assemble at lease a heat sink fin. The improvement in the interlocking devices comprises a female slot, a protruding hook, and an opening hole. Said protruding hook of each first heat sink fin wedges into said female slot of an adjacent first heat sink fin by the shape of said protruding hook corresponding to said female slot, and said protruding hook of each first heat sink fin having a barb portion for hooking into said opening hole of said adjacent first heat sink fin for interlocking completely in the vertical direction. Besides, the protruding hook further includes a protruding portion, said protruding portion having a T-shaped cross-section configuration is correspondingly equal to said female slot for interlocking completely in the horizontal direction. Therefore, the heat sink assembly provided by the present invention may be interlocked in both horizontal and vertical direction.

Abstract: A structure for assembling a heat sink assembly uses at least an interlocking device to assemble at lease a heat sink fin. The improvement in the interlocking devices comprises a female slot, a protruding hook, and an opening hole. Said protruding hook of each first heat sink fin wedges into said female slot of an adjacent first heat sink fin by the shape of said protruding hook corresponding to said female slot, and said protruding hook of each first heat sink fin having a barb portion for hooking into said opening hole of said adjacent first heat sink fin for interlocking completely in the vertical direction. Besides, the protruding hook further includes a protruding portion, said protruding portion having a T-shaped cross-section configuration is correspondingly equal to said female slot for interlocking completely in the horizontal direction. Therefore, the heat sink assembly provided by the present invention may be interlocked in both horizontal and vertical direction.