Thin fan

Abstract

The utility model provides a thin type fan which comprises a base, a base plate and a hollow shaft sleeve part, the base plate and the hollow shaft sleeve part are connected with each other, the shaft sleeve part protrudes out of the base plate, and the shaft sleeve part and the base plate both contain polyether-ether-ketone materials and are manufactured in an integrated injection molding mode. And the rotor unit is provided with a fan blade structure and a rotating shaft which are connected with each other, and the rotating shaft is pivoted in the shaft sleeve part.

Description

TECHNICAL FIELD

[0001] The present application relates to a thin fan. More particularly, the present application relates to a thin fan with a wear-resistant base. BACKGROUND

[0002] A heat dissipation fan commonly found in general electronic devices or apparatuses is mostly composed of a hub, a fan blade, a shaft, a wear-resistant sheet, a shaft sleeve, and a base. However, since the fan itself has a considerable thickness, the conventional heat dissipation fan structure has been difficult to apply in various thin electronic devices or apparatuses.

[0003] Therefore, how to design a thin fan with a smaller thickness and lower assembly cost has become an important issue for researchers in this technical field. SUMMARY

[0004] In view of the known problems, an embodiment of the present application provides a thin fan, comprising: a base having a bottom plate and a hollow shaft sleeve portion connected to each other, wherein the shaft sleeve portion and the bottom plate are both made of polyether ether ketone material and are integrally injection molded; and a rotor unit having a fan blade structure and a rotating shaft connected to each other, wherein the rotating shaft is pivoted in the shaft sleeve portion.

[0005] In an embodiment, the thin fan further comprises a bearing, and the shaft sleeve portion forms an opening, the rotating shaft and the bearing are arranged in the opening, the rotating shaft passes through the bearing, and the bearing is located between the rotating shaft and the shaft sleeve portion.

[0006] In an embodiment, the rotor unit further has a hub and a magnetic assembly, wherein the hub connects the fan blade structure and the rotating shaft, and the magnetic assembly is arranged on the inner side of the hub.

[0007] In an embodiment, the fan blade structure surrounds and is fixed to the outer side of the hub.

[0008] In an embodiment, the thin fan further comprises a circuit unit, the circuit unit is arranged on the bottom plate and has a substrate and a plurality of drive circuits arranged on the substrate, wherein the positions of the drive circuits correspond to the magnetic assembly, so as to drive the rotor unit to rotate relative to the base.

[0009] In an embodiment, the thin fan further comprises a magnetic guide, and the shaft sleeve portion forms an annular groove, wherein the magnetic guide is arranged in the groove.

[0010] In one embodiment, the magnetic guide member is made of silicon steel, and the magnetic component is a magnet, wherein a magnetic attraction force is generated between the magnetic guide member and the magnetic component, thereby keeping the rotating shaft in contact with the bottom plate.

[0011] In one embodiment, the recess is adjacent to the bottom plate.

[0012] In one embodiment, the bottom plate is formed with a recessed structure on the bottom side of the opening, and the rotating shaft extends into the recessed structure and contacts the bottom plate.

[0013] In one embodiment, the rotating shaft directly contacts the bottom plate in a direction perpendicular to the bottom plate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 An exploded view of a thin fan 100 according to one embodiment of the present application.

[0015] Figure 2 An exploded view of a thin fan 100 according to one embodiment of the present application. Figure 1 Another exploded view of the thin fan 100 according to one embodiment of the present application.

[0016] Figure 3 An assembled perspective view of the thin fan 100 according to one embodiment of the present application.

[0017] Figure 4 An enlarged view of a partial cross section of the base 11 and the magnetic guide member 17 in combination.

[0018] Figure 5 An enlarged view of a partial cross section of the thin fan 100 after assembly.

[0019] REFERENCE NUMERALS

[0020] 100: thin fan,

[0021] 11: base,

[0022] 110: bottom plate,

[0023] 111: shaft sleeve portion,

[0024] 112: opening,

[0025] 113: recessed structure,

[0026] 12: top cover,

[0027] 121: air inlet,

[0028] 13: middle frame,

[0029] 131: air outlet,

[0030] 14: rotor unit,

[0031] 141: a fan blade,

[0032] 142: a hub,

[0033] 143: a magnetic assembly,

[0034] 144: a rotating shaft,

[0035] 15: a circuit unit,

[0036] 151: a circuit substrate,

[0037] 152: a driving circuit,

[0038] 153: a wire,

[0039] 16: a bearing,

[0040] 17: a magnetic conducting member,

[0041] R: a recess. DETAILED DESCRIPTION

[0042] The following describes a thin fan according to an embodiment of the present application. However, it can be easily understood that the present application provides many suitable new concepts and can be implemented in a wide variety of specific contexts. The disclosed specific embodiments are merely used to illustrate the use of the present application in a specific method, and are not intended to limit the scope of the present application.

[0043] 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 application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0044] The described and other features, characteristics, and advantages of the present application will become more apparent from the detailed description considered in conjunction with the accompanying drawings. The drawings are not intended to limit the scope of the application, but rather, the drawings are intended to describe the principles of the application in a manner that is best understood by those skilled in the art. The drawings incorporate graphically by reference herein the figures described in the following detailed description.

[0045] First, refer to Figures 1-3 wherein Figure 1 represents an exploded view of a thin fan 100 according to an embodiment of the present application, Figure 2 represents Figure 1 another exploded view of the thin fan 100 shown in FIGS. 1 and 2, Figure 3 represents a perspective view of the thin fan 100 shown in FIGS. 1 and 2 in an assembled state.

[0046] As Figures 1-3 shown in the drawings, the thin fan 100 of an embodiment of the present application is a centrifugal fan, which can be arranged in a computer device (e.g. a notebook computer) to dissipate heat from the computer device, thereby avoiding malfunction or damage of internal components of the computer device due to excessive temperature.

[0047] The thin fan 100 mainly comprises a base 11, a top cover 12, a middle frame 13, a rotor unit 14, a circuit unit 15, a bearing 16 and a magnetic guide 17. Specifically, the middle frame 13 is fixed between the base 11 and the top cover 12, thereby forming a cavity between the base 11 and the top cover 12 to accommodate the rotor unit 14 and the circuit unit 15.

[0048] It should be particularly noted that the base 11 is made of polyether ether ketone (PEEK) material by one-piece molding, and comprises a bottom plate 110 and a hollow shaft sleeve portion 111 connected to each other, wherein the shaft sleeve portion 111 protrudes from the bottom plate 110. That is, the shaft sleeve portion 111 and the bottom plate 110 of the base 11 are made by one-piece injection molding, and both of them contain polyether ether ketone (PEEK) material with wear resistance.

[0049] As can be seen from the first and second drawings, an opening 112 is formed on the top side of the shaft sleeve portion 111 of the base 11, and a ring-shaped groove R is formed on the bottom side of the shaft sleeve portion 111, wherein the groove R is adjacent to the bottom plate 110. During assembly of the thin fan 100, the bearing 16 can be installed in the opening 112 of the shaft sleeve portion 111, and the magnetic guide 17 can be sleeved in the groove R on the bottom side of the shaft sleeve portion 111.

[0050] On the other hand, the rotor unit 14 comprises a fan blade structure 141, a hub 142, a magnetic assembly 143 (e.g. a magnet) and a rotating shaft 144 connected to each other, the rotating shaft 144 is fixed at the center of the hub 142, the magnetic assembly 143 is fixed to the inner side surface of the hub 142, and the fan blade structure 141 is wrapped around and fixed to the outer side of the hub 142. During assembly of the thin fan 100, the rotating shaft 144 passes through the bearing 16 and extends into the opening 112 of the shaft sleeve portion 111 of the base 11, thereby being pivotally connected to the base 11, wherein the position of the bearing 16 is between the rotating shaft 144 and the shaft sleeve portion 111 of the base 11.

[0051] The circuit unit 15 mainly comprises a circuit substrate 151, a plurality of driving circuits 152, and at least one wire 153. The circuit substrate 151 is arranged on the bottom plate 110 of the base 11. The driving circuits 152 are arranged on the circuit substrate 151 and correspond to the magnetic assembly 143.

[0052] It should be understood that the driving circuits 152 are internally provided with driving coils. The wire 153 is electrically connected to the circuit substrate 151 and an external power source (not shown). When the external power source applies a current signal to the driving circuits 152 through the wire 153 and the circuit substrate 151, an electromagnetic driving force is generated between the driving circuits 152 and the magnetic assembly 143 to drive the rotor unit 14 to rotate relative to the base 11.

[0053] From Figure 2 , Figure 3 it can be seen that the fan blade structure 141 and the hub 142 of the rotor unit 14 are exposed to an air inlet 121 of the top cover 12 after assembly. When the rotor unit 14 rotates relative to the base 11, the airflow can enter the inside of the thin fan 100 from the air inlet 121, and the airflow can be discharged through the air outlet 131 formed between the top cover 12, the base 11, and the middle frame 13. Figure 3

[0054] Then refer to Figure 4 , Figure 5 , wherein Figure 4 represents a partial cross-sectional enlarged view of the combination of the base 11 and the magnetic conducting member 17, Figure 5 represents a partial cross-sectional enlarged view of the thin fan 100 after assembly.

[0055] As shown in Figure 4 , a recess structure 113 is formed on the bottom plate 110 of the base 11 of the present embodiment. The recess structure 113 is located on the bottom side of the opening 112, and the shaft 144 is inserted into the recess structure 113 and contacts the bottom plate 110 after assembly.

[0056] As mentioned above, the magnetic conducting member 17 of the present embodiment is embedded in the annular groove R formed on the bottom side of the shaft sleeve part 111. The magnetic conducting member 17 can contain silicon steel or other metal materials with magnetic conductivity. After the thin fan 100 is assembled, a magnetic attraction force is generated between the magnetic conducting member 17 and the magnetic assembly 143, so that the end of the shaft 144 and the bottom plate 110 can be kept in contact in the vertical direction (as shown in Figure 5 ), and the shaft 144 of the rotor unit 14 can also be prevented from being separated from the bearing 16 and the shaft sleeve part 111.

[0057] ​It is to be noted that the base 11 of the present embodiment is made of wear-resistant polyether ether ketone (PEEK), i.e. the shaft sleeve part 111 and the bottom plate 110 are integrally formed by injection molding and are wear-resistant, so that the end of the rotating shaft 144 can directly contact the bottom plate 110 in the direction perpendicular to the bottom plate 110 without the need of additionally providing a conventional wear-resistant sheet.

[0058] In this way, the thin fan 100 of the present embodiment not only effectively reduces the thickness in the vertical direction to achieve the purpose of fan thinning, but also reduces the number of parts to simplify the assembly process, thereby greatly reducing the assembly cost and improving the production efficiency.

[0059] Although the embodiments of the present application and their advantages have been described in detail, it should be understood that various modifications, substitutions and alterations can be made to the embodiments without departing from the spirit and scope of the present application. In addition, the scope of the present application is not limited to the specific embodiments described in the specification, but includes all the processes, machines, manufactures, compositions of matter, means, methods and steps as presently existing or as future developed that fall within the scope of the embodiments described in the specification, as long as they can achieve substantially the same functions or obtain substantially the same results. Therefore, the scope of the present application includes all the processes, machines, manufactures, compositions of matter, means, methods and steps. In addition, each patent claim constitutes a separate embodiment, and the scope of the present application also includes the combination of each patent claim and embodiment.

[0060] Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of the present application is defined by the appended claims.

Claims

1. A thin fan, characterized in that, include: A base having an interconnected bottom plate and a hollow bushing portion protruding from the bottom plate, wherein both the bushing portion and the bottom plate are made of polyetheretherketone (PEEK) material and are manufactured by integral injection molding; and A rotor unit having an interconnected fan-blade structure and a shaft, wherein the shaft is pivotally connected within the bushing portion.

2. The thin fan according to claim 1, characterized in that, The slim fan also includes a bearing, and the bushing portion has an opening, the shaft and the bearing are disposed in the opening, the shaft passes through the bearing, and the bearing is located between the shaft and the bushing portion.

3. The thin fan according to claim 2, characterized in that, The rotor unit further includes a hub and a magnetic component, wherein the hub connects the fan blade structure and the shaft, and the magnetic component is disposed on the inner side of the hub.

4. The thin fan according to claim 3, characterized in that, The fan blade structure surrounds and is fixed to the outside of the hub.

5. The thin fan according to claim 3, characterized in that, The slim fan also includes a circuit unit disposed on the base plate and has a substrate and a plurality of drive circuits disposed on the substrate, wherein the positions of the plurality of drive circuits correspond to the magnetic component for driving the rotor unit to rotate relative to the base.

6. The thin fan according to claim 5, characterized in that, The slim fan also includes a magnetic conductor, and the bushing portion has an annular groove in which the magnetic conductor is disposed.

7. The thin fan according to claim 6, characterized in that, The magnetic conductor is made of silicon steel, and the magnetic component is a magnet. A magnetic attraction is generated between the magnetic conductor and the magnetic component, thereby keeping the rotating shaft in contact with the base plate.

8. The thin fan according to claim 6, characterized in that, The groove is adjacent to the base plate.

9. The thin fan according to claim 2, characterized in that, The base plate has a recessed structure located on the bottom side of the opening, and the rotating shaft extends into the recessed structure and contacts the base plate.

10. The thin fan according to claim 1, characterized in that, The rotating shaft contacts the base plate directly in a direction perpendicular to the base plate.

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