Cooling fan and electronic equipment

Abstract

The utility model relates to a cooling fan and electronic equipment, the cooling fan comprises a shell, a fixing shaft, a shaft sleeve, fan blades, a shaft cap and a driving piece, the fixing shaft comprises a first connecting part and a second connecting part, and a first boss is convexly arranged at one end of the first connecting part; the shaft sleeve is sleeved outside the first connecting part and rotates relative to the first connecting part; a second boss abutting against the first boss is arranged on the inner side wall of the shaft sleeve in a protruding mode, the fan blades are connected with the shaft sleeve, and through holes are formed in the fan blades. The shaft cap comprises a head part and a sleeving part, and the sleeving part is arranged in the through hole in a penetrating mode and arranged outside the second connecting part in a sleeving mode. The second boss abuts against the first boss, and the first boss can play a role in supporting the shaft sleeve and the fan blades. The head is arranged on the upper surface of the fan blade in the protruding mode, the head of the shaft cap can bear extrusion of external force, the external force can be prevented from acting on the fan blade, rotation of the fan blade is not affected, the heat dissipation effect of the fan blade is effectively guaranteed, and the phenomenon that the fan blade generates abnormal noise due to the fact that the external force acts on the fan blade is avoided.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology for electronic devices, and in particular to a cooling fan and an electronic device. Background Technology

[0002] With the rapid development of electronic technology, the operating speed of heat-generating electronic components such as central processing units is getting faster and faster, and the heat generated during their operation is also increasing accordingly. In order to dissipate this heat and ensure the normal operation of electronic components, cooling fans are generally used to cool electronic components, especially in laptops.

[0003] Due to the thin and light design of laptops, the vertical clearance of the laptop cooling fan is greatly reduced. When the laptop casing is squeezed by external force, the cooling fan is often squeezed due to the deformation of the laptop casing. This will affect the normal operation of the cooling fan, and may also cause abnormal noise during operation. In severe cases, it may even damage the fan. Utility Model Content

[0004] Therefore, it is necessary to provide a cooling fan and electronic device that can ensure the rotation of the fan blades is not affected, effectively guarantee the heat dissipation effect of the fan blades, and avoid the phenomenon of abnormal noise caused by external force acting on the fan blades.

[0005] A cooling fan, comprising:

[0006] case;

[0007] A fixed shaft includes a first connecting part and a second connecting part. The two opposite ends of the first connecting part are respectively connected to the housing and the second connecting part, and the outer diameter of the second connecting part is smaller than the outer diameter of the first connecting part. A first boss is provided on one end of the first connecting part near the second connecting part.

[0008] A bushing is sleeved outside the first connecting part and is rotatable relative to the first connecting part; a second protrusion is provided on the inner side wall of the bushing, and the second protrusion abuts against the first protrusion.

[0009] The fan blade is connected to the bushing, and a through hole is provided on the fan blade;

[0010] A shaft cap, the shaft cap including a head and a sleeve portion connected to one end of the head, the sleeve portion passing through the through hole and sleeved outside the second connecting portion, the head protruding from the upper surface of the fan blade.

[0011] A drive unit for driving the fan blades to rotate.

[0012] In one embodiment, the upper surface of the fan blade is provided with a receiving groove, the inside of the receiving groove is connected to the through hole, the head is received in the receiving groove, and the horizontal plane of the upper surface of the head is higher than the horizontal plane of the upper surface of the fan blade.

[0013] In one embodiment, a first gap exists between the head and the receiving groove.

[0014] In one embodiment, the drive unit includes a stator disposed on the housing and a rotor disposed on the fan blades.

[0015] In one embodiment, the cooling fan further includes a mounting bracket disposed within the housing, the stator being disposed on the mounting bracket, the mounting bracket being provided with a first hook, and the fan blade being provided with a second hook, the first hook and the second hook engaging with each other.

[0016] In one embodiment, a third gap exists between the first hook and the second hook.

[0017] In one embodiment, the first gap is larger than the third gap.

[0018] In one embodiment, the housing has a receiving cavity, the fixed shaft is disposed at the bottom of the receiving cavity, and a second gap exists between the bushing and the bottom of the receiving cavity; the end of the bushing away from the bottom of the receiving cavity is connected to the fan blade.

[0019] In one embodiment, an oil inlet hole communicating with the interior of the bushing is provided on the inner sidewall of the bushing.

[0020] This application also provides an electronic device, including the cooling fan described above.

[0021] In the above solution, a second boss is provided on the inner side wall of the bushing, and a first boss is provided at the end of the first connecting part near the second connecting part. The second boss abuts against the first boss, and the first boss can support the bushing and the fan blade. The structure of the second boss and the first boss can prevent the fan blade and the bushing from shifting during rotation. By protruding the head of the bushing cap on the upper surface of the fan blade, the head of the bushing cap can withstand the pressure from external forces, which can prevent external forces from acting on the fan blade, so that the rotation of the fan blade is not affected, effectively ensuring the heat dissipation effect of the fan blade, and avoiding the phenomenon of abnormal noise caused by external forces acting on the fan blade. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of a cooling fan according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of a cooling fan according to an embodiment of this application.

[0026] Figure 3 This is an exploded view of the cooling fan according to an embodiment of this application.

[0027] Figure label:

[0028] 10. Cooling fan; 100. Housing; 200. Fixed shaft; 210. First connecting part; 220. Second connecting part; 230. First boss; 300. Bushing; 310. Second boss; 320. Oil inlet; 400. Fan blade; 410. Through hole; 420. Hub; 430. Blade; 440. Receiving groove; 450. Second hook; 500. Shaft cap; 510. Head; 520. Sleeve part; 600. Drive component; 610. Stator; 620. Rotor; 630. Mounting bracket; 631. First hook; 640. Circuit board. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] Please see Figure 1 , Figure 2 and Figure 3 The embodiments of this application relate to a cooling fan 10, including a housing 100, a fixed shaft 200, a bushing 300, a fan blade 400, a shaft cap 500, and a drive component 600. The fixed shaft 200, bushing 300, fan blade 400, shaft cap 500, and drive component 600 are all disposed within the housing 100.

[0036] The fixed shaft 200 includes a first connecting portion 210 and a second connecting portion 220. The two opposite ends of the first connecting portion 210 are connected to the housing 100 and the second connecting portion 220, respectively, and the outer diameter of the second connecting portion 220 is smaller than the outer diameter of the first connecting portion 210. A first boss 230 protrudes from one end of the first connecting portion 210 near the second connecting portion 220. Specifically, the first boss 230 is arranged around the second connecting portion 220.

[0037] One end of the first connecting part 210 is fixedly connected to the housing 100, and the other end of the first connecting part 210 is connected to the second connecting part 220. The second connecting part 220 is located above the first connecting part 210. It should be noted that the first connecting part 210 and the second connecting part 220 are integrally formed, which can ensure the connection strength between the first connecting part 210 and the second connecting part 220.

[0038] The bushing 300 is sleeved outside the first connecting portion 210 and is rotatable relative to the first connecting portion 210. A second boss 310 protrudes from the inner side wall of the bushing 300, and the second boss 310 abuts against the first boss 230. Specifically, the second boss 310 abuts against the first boss 230 from above.

[0039] The fan blade 400 is connected to the bushing 300, and the drive unit 600 is used to drive the fan blade 400 to rotate. When the drive unit 600 drives the fan blade 400 to rotate, it can drive the bushing 300 to rotate relative to the first connecting part 210.

[0040] By providing a second boss 310 on the inner sidewall of the bushing 300, and providing a first boss 230 at the end of the first connecting part 210 near the second connecting part 220, the second boss 310 abuts against the first boss 230. The first boss 230 can support the bushing 300 and the fan blade 400. The structure of the second boss 310 and the first boss 230 can prevent the fan blade 400 and the bushing 300 from shifting during rotation.

[0041] A through hole 410 is provided on the fan blade 400. Specifically, the fan blade 400 includes a hub 420 and a plurality of blades 430, which are spaced apart circumferentially on the outer side wall of the hub 420. The through hole 410 is formed on the hub 420 of the fan blade 400. The hub 420 of the fan blade 400 is connected to the bushing 300. In one embodiment, the hub 420 of the fan blade 400 is bonded to the bushing 300. In another embodiment, the hub 420 of the fan blade 400 is detachably connected to the bushing 300.

[0042] The bearing cap 500 includes a head 510 and a sleeve portion 520 connected to one end of the head 510. The sleeve portion 520 passes through the through hole 410 and is sleeved on the outside of the second connecting portion 220. The head 510 protrudes from the upper surface of the fan blade 400. Specifically, the head 510 and the sleeve portion 520 have a T-shaped structure.

[0043] By protruding the head 510 of the shaft cap 500 onto the upper surface of the fan blade 400, the head 510 of the shaft cap 500 can withstand the pressure from external forces, thus preventing external forces from acting on the fan blade 400 and ensuring that the rotation of the fan blade 400 is not affected. This effectively guarantees the heat dissipation effect of the fan blade 400 and avoids the phenomenon of abnormal noise caused by external forces acting on the fan blade 400.

[0044] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, a receiving groove 440 is provided on the upper surface of the fan blade 400, the inside of the receiving groove 440 is connected to the through hole 410, the head 510 is received in the receiving groove 440, and the horizontal plane of the upper surface of the head 510 is higher than the horizontal plane of the upper surface of the fan blade 400.

[0045] It should be noted that this application does not limit the height of the horizontal plane where the upper surface of the head 510 is above the horizontal plane where the upper surface of the fan blade 400 is, and can be set according to actual usage requirements. In this embodiment, the height of the horizontal plane where the upper surface of the head 510 is above the horizontal plane where the upper surface of the fan blade 400 is 0.7mm.

[0046] Please see Figure 1 , Figure 2 and Figure 3 Optionally, according to some embodiments of this application, a first gap exists between the head 510 and the receiving groove 440. It should be noted that this application does not limit the first gap and it can be set according to actual usage requirements. In this embodiment, the first gap is 0.2 mm.

[0047] By setting a first gap, when the fan blade 400 and bushing 300 are rotating, the fan blade 400 will not contact the head 510 of the bushing 500, thus avoiding the frictional resistance generated by the fan blade 400 and bushing 300 during rotation, thereby reducing the power consumption of the fan blade 400 and bushing 300, increasing the rotational speed of the fan blade 400 and bushing 300, and reducing the abnormal noise generated by the fan blade 400 and bushing 300 during operation.

[0048] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the housing 100 forms a receiving cavity, the fixed shaft 200 is disposed at the bottom of the receiving cavity, and a second gap exists between the bushing 300 and the bottom of the receiving cavity. The end of the bushing 300 away from the bottom of the receiving cavity is connected to the fan blade 400. It should be noted that this application does not limit the second gap and it can be set according to actual usage requirements. In this embodiment, the second gap is 0.2 mm.

[0049] By setting a second gap, the bushing 300 will not contact the bottom of the cavity when the fan blade 400 and bushing 300 are rotating, thus avoiding the frictional resistance generated by the fan blade 400 and bushing 300 during rotation, thereby reducing the power consumption of the fan blade 400 and bushing 300, increasing the rotation speed of the fan blade 400 and bushing 300, and reducing the abnormal noise generated by the fan blade 400 and bushing 300 during operation.

[0050] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, an oil inlet hole 320 communicating with the interior of the bushing 300 is provided on the inner sidewall of the bushing 300. Specifically, the oil inlet hole 320 is arranged around the inner sidewall of the bushing 300.

[0051] By providing an oil inlet hole 320, oil can be injected into the oil inlet hole 320 to reduce the frictional resistance between the inner side wall of the bushing 300 and the fixed shaft 200, thereby reducing the power consumption of the fan blade 400 and the bushing 300, increasing the rotational speed of the fan blade 400 and the bushing 300, and reducing the abnormal noise generated by the fan blade 400 and the bushing 300 during operation.

[0052] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the drive unit 600 includes a stator 610 disposed on the housing 100 and a rotor 620 disposed on the fan blade 400. The number of stators 610 and rotors 620 can be multiple. In this embodiment, the number of stators 610 and rotors 620 is not limited and can be determined according to the actual size of the fan blade 400 and the required heat dissipation intensity.

[0053] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the cooling fan 10 further includes a mounting bracket 630 and a circuit board 640 disposed within the housing 100. The stator 610 is disposed on the mounting bracket 630, and the circuit board 640 is disposed at the bottom of the mounting bracket 630 and electrically connected to the metal coil. Specifically, the mounting bracket 630 is disposed within the receiving cavity. There is a gap between the bushing 300 and the circuit board 640. The mounting bracket 630 is made of insulating material; exemplarily, the mounting bracket 630 is made of plastic.

[0054] The stator 610 is a metal coil mounted on the mounting bracket 630. The rotor 620 employs a magnetic component. For example, the rotor 620 is an electromagnet. Current flowing through the metal coil generates a magnetic field, which interacts with the magnetic field of the rotor 620 on the fan blade 400 to cause the fan blade 400 to rotate.

[0055] By setting the stator 610 and rotor 620, the fan blades 400 can produce a floating effect when rotating, resulting in less abnormal noise.

[0056] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, a first hook 631 is provided on the mounting bracket 630, and a second hook 450 is provided on the fan blade 400, with the first hook 631 and the second hook 450 engaging with each other. By providing the first hook 631 and the second hook 450, the fan blade 400 can be prevented from falling out, and the fan blade 400 can be quickly disassembled and assembled. When the fan blade 400 rotates, the first hook 631 and the second hook 450 cooperate with each other to prevent the fan blade 400 from falling out, thereby ensuring the stable rotation of the fan blade 400.

[0057] Multiple first hooks 631 and second hooks 450 are included, and the number of first hooks 631 and the number of second hooks 450 are arranged in a one-to-one correspondence. Multiple second hooks 450 are spaced apart on the hub 420 along the circumference of the fan blade 400. In this embodiment, the number of first hooks 631 and second hooks 450 is four.

[0058] A third gap exists between the first hook 631 and the second hook 450. It should be noted that this application does not limit the size of the third gap, which can be set according to actual usage requirements. In this embodiment, the third gap is 0.1 mm.

[0059] By setting a third gap, the first hook 631 and the second hook 450 will not come into contact when the fan blade 400 and the bushing 300 are rotating, thus avoiding the frictional resistance generated when the fan blade 400 and the bushing 300 are rotating, thereby reducing the power consumption of the fan blade 400 and the bushing 300, increasing the rotation speed of the fan blade 400 and the bushing 300, and reducing the abnormal noise generated by the fan blade 400 and the bushing 300 during operation.

[0060] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the first gap is greater than the third gap. By setting the first gap to be greater than the third gap, it is possible to avoid the fan blade 400 and bushing 300 from contacting the bushing 500 when they rotate, thus avoiding the frictional resistance generated when they rotate, thereby reducing the power consumption of the fan blade 400 and bushing 300, increasing the rotational speed of the fan blade 400 and bushing 300, and reducing the abnormal noise generated by the fan blade 400 and bushing 300 during operation.

[0061] This application also provides an electronic device, including the cooling fan 10 as described above. In this embodiment, the electronic device is a laptop computer. In other embodiments, the electronic device may be a server, power supply, charging station, computer host, or game console, etc.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cooling fan, characterized in that, include: case; A fixed shaft includes a first connecting part and a second connecting part. The two opposite ends of the first connecting part are respectively connected to the housing and the second connecting part, and the outer diameter of the second connecting part is smaller than the outer diameter of the first connecting part. A first boss is provided on one end of the first connecting part near the second connecting part. A bushing is sleeved outside the first connecting part and is rotatable relative to the first connecting part; a second protrusion is provided on the inner side wall of the bushing, and the second protrusion abuts against the first protrusion. The fan blade is connected to the bushing, and a through hole is provided on the fan blade; A shaft cap, the shaft cap including a head and a sleeve portion connected to one end of the head, the sleeve portion passing through the through hole and sleeved outside the second connecting portion, the head protruding from the upper surface of the fan blade. A drive unit for driving the fan blades to rotate.

2. The cooling fan according to claim 1, characterized in that, The upper surface of the fan blade is provided with a receiving groove, the inside of the receiving groove is connected to the through hole, the head is received in the receiving groove, and the horizontal plane of the upper surface of the head is higher than the horizontal plane of the upper surface of the fan blade.

3. The cooling fan according to claim 2, characterized in that, There is a first gap between the head and the receiving groove.

4. The cooling fan according to claim 3, characterized in that, The drive unit includes a stator disposed on the housing and a rotor disposed on the fan blades.

5. The cooling fan according to claim 4, characterized in that, The cooling fan also includes a mounting bracket disposed within the housing, the stator is disposed on the mounting bracket, the mounting bracket is provided with a first hook, and the fan blade is provided with a second hook, the first hook and the second hook engaging with each other.

6. The cooling fan according to claim 5, characterized in that, There is a third gap between the first hook and the second hook.

7. The cooling fan according to claim 6, characterized in that, The first gap is larger than the third gap.

8. The cooling fan according to claim 1, characterized in that, The housing has a receiving cavity, the fixed shaft is disposed at the bottom of the receiving cavity, and there is a second gap between the bushing and the bottom of the receiving cavity; the end of the bushing away from the bottom of the receiving cavity is connected to the fan blade.

9. The cooling fan according to claim 1, characterized in that, An oil inlet hole communicating with the interior of the bushing is provided on the inner side wall of the bushing.

10. An electronic device, characterized in that, Includes the cooling fan as described in any one of claims 1 to 9.

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