Fan mechanism

Abstract

The utility model provides a fan mechanism which comprises a shell, a bearing, a rotating shaft, a fan blade and a driving assembly. The shell comprises a base. The bearing is arranged on the shell. The rotating shaft is connected to the shell through a bearing. The blades are connected with the rotating shaft. The driving assembly is used for driving the rotating shaft to rotate relative to the shell, a concave part is formed in the upper surface, facing the fan blades, of the base, and a circuit board of the driving assembly is contained in the concave part.

Description

Technical Field

[0001] The present utility model relates to a fan mechanism. More specifically, the present utility model relates to a fan mechanism that can improve the performance of a fan. Background Art

[0002] With the trend of high-performance and thin-and-light development of electronic devices, the temperature of electronic devices during use is getting higher and it is more difficult to dissipate heat, thus easily causing unstable phenomena and affecting the reliability of products. Therefore, existing electronic devices often use fans as heat dissipation devices.

[0003] The centrifugal fan is one of the commonly used heat dissipation devices at present. This kind of fan sucks in gas through the air inlets located on the upper and lower surfaces of the housing, and then discharges the gas through the air outlet located on the side to take away heat energy.

[0004] Since electronic devices have become thinner and lighter, the thickness of the centrifugal fan also needs to be reduced. However, in this way, the performance of the centrifugal fan may be reduced, resulting in a decrease in the heat dissipation efficiency. Therefore, how to solve the foregoing problems has become an important issue. Summary of the Utility Model

[0005] To solve the above-mentioned conventional problems, the present utility model provides a fan mechanism, including a housing, a bearing, a rotating shaft, a fan blade, and a driving component. The housing includes a base. The bearing is arranged on the housing. The rotating shaft is connected to the housing through the bearing. The fan blade is connected to the rotating shaft. The driving component is used to drive the rotating shaft to rotate relative to the housing, wherein a recess is formed on an upper surface of the base facing the fan blade, and a circuit board of the driving component is accommodated in the recess.

[0006] In some embodiments, the shape of the foregoing recess matches the shape of the circuit board.

[0007] In some embodiments, the foregoing circuit board has a top surface facing the fan blade, and the top surface is flush with the upper surface.

[0008] In some embodiments, the foregoing base has a side surface, and an opening is formed on the side surface, and the opening communicates the recess with an external environment.

[0009] In some embodiments, the foregoing circuit board passes through the opening.

[0010] In some embodiments, the foregoing fan mechanism includes an air outlet, and the air outlet and the opening are substantially located on opposite sides of the fan mechanism.

[0011] In some embodiments, within the range of the foregoing housing, the base completely shields the circuit board.

[0012] In some embodiments, the aforementioned base further includes a lower surface, and this lower surface includes a first part and a second part, wherein the first part corresponds to the area of the upper surface provided with the recess, the second part corresponds to the remaining area of the upper surface, and the first part is flush with the second part.

[0013] In some embodiments, the aforementioned drive assembly includes a silicon steel sheet, and when observing along the main axis of the rotating shaft, the silicon steel sheet is within the range of the circuit board.

[0014] In some embodiments, the aforementioned base is a metal plate, and the recess of the base is formed by metal etching. Description of the Drawings

[0015] The embodiments of the present invention can be better understood according to the following detailed description in conjunction with the accompanying drawings. It should be noted that, according to the standard practice of this industry, the various components in the drawings are not necessarily drawn to scale. In fact, the sizes of various components may be arbitrarily enlarged or reduced for clear illustration.

[0016] Figure 1 is a schematic diagram showing a fan mechanism in an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram showing the fan mechanism in an embodiment of the present invention from another perspective;

[0018] Figure 3 is an exploded view showing the fan mechanism in an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram showing the base in an embodiment of the present invention;

[0020] Figure 5 is showing Figure 1 a cross-sectional view taken along the A-A direction in

[0021] Figure 6 is a bottom view showing the fan mechanism in an embodiment of the present invention.

[0022]

Symbol Description

[0023] 100: Housing

[0024] 101: Air inlet

[0025] 102: Air inlet

[0026] 103: Air outlet

[0027] 110: Upper cover

[0028] 120: Side wall

[0029] 130: Base

[0030] 131: Upper surface

[0031] 132: Side surface

[0032] 133: Lower surface

[0033] 133A: First part

[0034] 133B: Second part

[0035] 134: Concave part

[0036] 135: Opening

[0037] 140: Connecting element

[0038] 141: Hollow space

[0039] 200: Fan blade

[0040] 300: Rotating shaft

[0041] 310: Main shaft

[0042] 400: Bearing

[0043] 500: Driving assembly

[0044] 510, 510A, 510B: Silicon steel sheet

[0045] 511: Pole teeth

[0046] 520: Coil

[0047] 530: Magnetic element

[0048] 540: Circuit board

[0049] 541: Top surface

[0050] 542: Circular section

[0051] 543: Rectangular section

[0052] F: Fan mechanism Detailed implementation manners

[0053] The following describes the fan mechanism of the embodiments of the present utility model. However, it can be easily understood that the embodiments of the present utility model provide many suitable utility model concepts that can be implemented in a wide variety of specific backgrounds. The specific embodiments disclosed are only used to illustrate the use of the present utility model in a specific method and are not intended to limit the scope of the present utility model.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It is understood that such terms, such as those defined in a commonly used dictionary, should be interpreted as having a meaning consistent with the relevant technology and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined herein.

[0055] The following disclosure in this specification describes specific examples of various components and their arrangements to simplify the description. Of course, these specific examples are not intended to limit the present utility model. For example, if the following disclosure in this specification describes forming a first feature on or above a second feature, it means that it includes embodiments in which the above-mentioned first feature and the above-mentioned second feature are in direct contact, and also includes embodiments in which additional features can be formed between the above-mentioned first feature and the above-mentioned second feature, so that the above-mentioned first feature and the above-mentioned second feature may not be in direct contact. Furthermore, for the convenience of describing the relationship between one feature and another feature in the drawings, spatial relative terms may be used, such as "below", "beneath", "under", "above", "on", and similar terms. Except for the orientation shown in the drawings, the spatial relative terms cover different orientations during the use or operation of the device. The device can also be positioned otherwise (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be correspondingly interpreted.

[0056] Figure 1 is a schematic diagram showing a fan mechanism F according to an embodiment of the present utility model, Figure 2 is a schematic diagram showing the aforementioned fan mechanism F from another perspective, and Figure 3 is an exploded view showing the aforementioned fan mechanism F. As Figures 1 to 3 shown, the aforementioned fan mechanism F mainly includes a housing 100, a fan blade 200, a rotating shaft 300, a bearing 400, and a driving component 500. When the fan mechanism F operates, the driving component 500 can drive the fan blade 200 to rotate relative to the housing 100 around the main shaft 310 of the rotating shaft 300, so that the gas adjacent to the fan mechanism F flows into the fan mechanism F from the air inlets 101 and 102 on the upper and lower sides of the housing 100, and leaves the fan device from the air outlet 103 on the side of the housing 100.

[0057] Generally speaking, the aforementioned fan device is disposed in an electronic device (such as a notebook computer) or adjacent to an electronic component that generates heat (such as a processor, a hard disk, or a chip). Therefore, the purpose of heat dissipation can be achieved through the flow of the aforementioned gas.

[0058] The housing 100 may include an upper cover 110, a side wall 120, a base 130, and a connecting element 140, and the aforementioned air inlets 101 and 102 may be formed on the upper cover 110 and the base 130 respectively. The upper cover 110 and the base 130 may generally have a flat plate structure, the side wall 120 may generally have a C-shaped structure, and the side wall 120 may be located between the upper cover 110 and the base 130 to connect the two. Therefore, when the upper cover 110, the side wall 120, and the base 130 are combined to form the housing 100, an air outlet 103 will be formed on one side of the housing 100, and an accommodating space communicating with the air inlets 101, 102, and the air outlet 103 may be formed inside the housing 100. The fan blade 200, the rotating shaft 300, the bearing 400, and the driving assembly 500 may be accommodated in this accommodating space.

[0059] As Figure 3 and Figure 4 shown, wherein the base 130 is a metal plate, a recess 134 may be formed on the upper surface 131 of the base 130, an opening 135 may be formed on the side surface 132 of the base 130, and this opening 135 may communicate the recess 134 with the external environment. The aforementioned recess 134 and opening 135 may be formed by etching, for example, in a way of metal etching, so that the situation that the base 130 has an unexpected bend or the base 130 has an uneven thickness can be avoided.

[0060] Figure 5 is a sectional view along the A-A direction in Figure 1 . As Figures 1 to 5 shown, the connecting element 140 may be fixed to the base 130, and its interior may have a cylindrical hollow space 141 to accommodate the rotating shaft 300 and the bearing 400 and limit the rotating shaft 300 and the bearing 400. The rotating shaft 300 may be rotatably connected to the connecting element 140 through the bearing 400, and the fan blade 200 may be fixed to the rotating shaft 300. Therefore, when the rotating shaft 300 rotates relative to the housing 100 around its main axis 310, the fan blade 200 will also rotate relative to the housing 100 around the main axis 310.

[0061] In some embodiments, the connecting element 140 and the base 130 may be integrally formed, but it is not limited thereto.

[0062] The driving assembly 500 may include at least one silicon steel sheet 510, at least one coil 520, at least one magnetic element 530, and a circuit board 540. The silicon steel sheet 510 may be fixed to the connecting element 140 and may have a plurality of pole teeth 511. The coil 520 may be wound around the pole teeth 511 of the silicon steel sheet 510, and the magnetic element 530 may be disposed on the fan blade 200 and correspond to the aforementioned coil 520.

[0063] When current flows into the coil 520, the electromagnetic interaction between the coil 520 and the magnetic element 530 can generate a driving force, which can drive the fan blade 200 and the rotating shaft 300 to rotate relative to the housing 100.

[0064] In this embodiment, the driving assembly 500 may include two silicon steel sheets 510A and 510B. These two silicon steel sheets 510A and 510B may generally have the same shape and may be arranged along the main shaft 310 of the rotating shaft 300. Among them, the two silicon steel sheets 510A and 510B may be separated from each other, and the pole teeth 511 of the two silicon steel sheets 510A and 510B may be aligned with each other. A single coil 520 may be wound around a pole tooth 511 of the silicon steel sheet 510A and a pole tooth 511 of the silicon steel sheet 510B at the same time.

[0065] The circuit board 540 may be disposed on the base 130 of the housing 100 and received in the recessed portion 134 of the base 130. The coil 520 may be electrically connected to the circuit board 540 to supply the required current to the coil 520 through the circuit board 540.

[0066] It should be noted that the circuit board 540 may have a top surface 541, and this top surface 541 may be flush with the upper surface 131 of the base 130. Therefore, the overall thickness of the fan mechanism F can be reduced, and the volume of the configured magnetic element 530 can be increased, thereby improving the performance of the fan mechanism F.

[0067] When the fan mechanism F is assembled, the top surface 541 of the circuit board 540 and the upper surface 131 of the base 130 may face the fan blade 200, and there is a specific distance between the fan blade 200 and the top surface 541 / upper surface 131. For example, when the overall thickness of the fan mechanism F is between 2 mm and 4 mm, the distance between the fan blade 200 and the top surface 541 / upper surface 131 may be between 0.25 mm and 0.5 mm.

[0068] In addition, the shape of the recessed portion 134 may correspond to the shape of the circuit board 540, so that the circuit board 540 can be accurately positioned. In this embodiment, the circuit board 540 may have a circular section 542 corresponding to the silicon steel sheet 510 and a rectangular section 543 extending toward the outside of the fan mechanism F. Therefore, the recessed portion 134 also has corresponding circular and rectangular sections, and the dimensions are equivalent to the circular section 542 and the rectangular section 543 of the circuit board 540.

[0069] As Figure 6 shown, when viewed along the main shaft 310, the silicon steel sheet 510 may be located within the range of the circular section 542 of the circuit board 540, that is, the silicon steel sheet 510 does not exceed the contour of the circular section 542. The coil 520 may be connected to the circular section 542 of the circuit board 540 and the pole tooth 511 of the silicon steel sheet 510.

[0070] The rectangular section 543 of the circuit board 540 can be connected to the circular section 542 and can extend through the opening 135 on the side surface 132 of the base 130 to be connected to external electronic components. In this embodiment, within the scope of the housing 100, the base 130 of the housing 100 can completely shield the circuit board 540 (that is, except for the part extending out from the opening 135, the circuit board 540 will not be exposed from the base 130), thereby avoiding interference from the external environment to the driving of the fan mechanism F.

[0071] Please refer correspondingly to Figure 5 and Figure 6 , the lower surface 133 of the base 130 can be divided into a first part 133A and a second part 133B, where the first part 133A corresponds to the position of the recess 134 on the upper surface 131, and the second part 133B corresponds to the rest of the upper surface 131. The first part 133A and the second part 133B can be flush, so that the overall appearance of the fan mechanism F can be kept flat, and the thickness of the base 130 at the recess 134 can be less than the thickness of the rest of the part.

[0072] As long as the features among the foregoing embodiments do not violate the spirit of the present utility model or conflict with each other, they can be arbitrarily mixed and used.

[0073] In summary, the present utility model provides a fan mechanism, including a housing, a bearing, a rotating shaft, a fan blade, and a driving component. The housing includes a base. The bearing is arranged on the housing. The rotating shaft is connected to the housing through the bearing. The fan blade is connected to the rotating shaft. The driving component is used to drive the rotating shaft to rotate relative to the housing, wherein a recess is formed on an upper surface of the base facing the fan blade, and a circuit board of the driving component is accommodated in the recess.

[0074] Although the embodiments of the present utility model and their advantages have been disclosed as above, it should be understood that any person with ordinary knowledge in the technical field can make changes, substitutions and modifications without departing from the spirit and scope of the present utility model. In addition, the protection scope of the present utility model is not limited to the processes, machines, manufactures, compositions of matter, devices, methods and steps in the specific embodiments described in the specification. Any person with ordinary knowledge in the technical field can understand the processes, machines, manufactures, compositions of matter, devices, methods and steps developed currently or in the future from the disclosure of the present utility model. As long as they can perform substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to the present utility model. Therefore, the protection scope of the present utility model includes the above-mentioned processes, machines, manufactures, compositions of matter, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the protection scope of the present utility model also includes the combination of each claim and the embodiment.

[0075] Although the present utility model has been disclosed above in several preferred embodiments as described above, it is not intended to limit the present utility model. Those of ordinary skill in the technical field to which the present utility model pertains can make some modifications and refinements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims. In addition, each claim constitutes an independent embodiment, and various combinations of claims and embodiments are within the scope of the present utility model.

Claims

1. A fan mechanism, characterized in that, Comprising: A housing including a base; A bearing disposed on the housing; A rotating shaft connected to the housing through the bearing; A fan blade connected to the rotating shaft; and A driving component for driving the rotating shaft to rotate relative to the housing, wherein a recess is formed on an upper surface of the base facing the fan blade, and a circuit board of the driving component is received in the recess.

2. The fan mechanism according to claim 1, wherein The outer shape of the recess matches the outer shape of the circuit board.

3. The fan mechanism according to claim 1, wherein, The circuit board has a top surface facing the fan blade, and the top surface is flush with the upper surface.

4. The fan mechanism according to claim 1, wherein, The base has a side surface, and an opening is formed on the side surface, and the opening communicates the recess with an external environment.

5. The fan mechanism according to claim 4, wherein, The circuit board passes through the opening.

6. The fan mechanism according to claim 4, characterized in that The fan mechanism includes an air outlet, and the air outlet and the opening are generally located on opposite sides of the fan mechanism.

7. The fan mechanism according to claim 1, characterized in that, Within the range of the housing, the base completely shields the circuit board.

8. The fan mechanism according to claim 1, characterized in that The base further includes a lower surface, and the lower surface includes a first portion and a second portion, wherein the first portion corresponds to the area of the upper surface where the recess is provided, the second portion corresponds to the remaining area of the upper surface, and the first portion is flush with the second portion.

9. The fan mechanism according to claim 1, wherein The driving component includes a silicon steel sheet, and when viewed along the main axis of the rotating shaft, the silicon steel sheet is within the range of the circuit board.

10. The fan mechanism according to claim 1, characterized in that, The base is a metal plate, and the recess of the base is formed by a metal etching method.

Images