TW202117191A - Pressproof fan structure - Google Patents

Abstract

A pressproof fan structure includes: a fan frame having an upper case and a lower case, the upper case having a wind entrance; a support shaft, one end of the support shaft being inserted in one side of the lower case, the other end of the support shaft protruding out from the upper case; an oil-retaining bearing having a bearing hole, in which the support shaft is fitted; a rotor assembly fitted around and connected with the oil-retaining bearing; a restriction member fitted around the support shaft near an upper end of the oil-retaining bearing; a thrust member fitted around the support shaft near a lower end of the oil-retaining bearing; and a stator assembly disposed on the lower case adjacently around the oil-retaining bearing without contacting the oil-retaining bearing. In the above structure, the support shaft provides supporting effect, whereby when an external unit above the fan is pressed down to apply a great depression force to the fan, the external unit is prevented from compressing the fan. Therefore, the fan is protected from being damaged and will not stop rotating to achieve pressproof effect for the fan.

Description

Anti-press fan structure

The invention relates to the field of fans, in particular to an anti-pressing fan structure.

Press, cooling fans are widely assembled in desktop computers, notebook computers, tablet computers and other electronic products to produce heat dissipation function, and the current design of notebook computers, tablet computers and other products are designed to be thin and light. Trend, in order to comply with the current trend of lightness and thinness, the current fan is designed to be a thin fan. However, the thin fan is susceptible to being pressed by the panel or keyboard, causing damage to the fan wheel or deformation of the flow channel to prevent the wind from flowing out. Therefore, how to solve the above-mentioned problems and deficiencies is the direction that the inventors of this case and related manufacturers engaged in this industry urgently want to study and improve.

In order to improve the above-mentioned problems, an object of the present invention is to provide an anti-pressing fan structure that prevents external units such as a keyboard or a housing or a panel from compressing the rotor group or fan frame. Another object of the present invention is to provide a support shaft supporting a rotor set in a fan frame, the support shaft has a protruding section protruding from the rotor set and the fan frame to receive an external unit, and an axial space is maintained Between the external unit and the rotor group, at least the rotor group is prevented from being compressed by the external unit. Another object of the present invention is to provide a flow channel of a fan frame with at least one support column supporting a convex body on the outer surface of the fan frame through the convex body to maintain an axial space between the external unit and the fan frame , At least prevent the flow channel from being compressed by the external unit. In order to achieve the above objective, the present invention provides an anti-pressing fan structure, which includes: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet; a support shaft, one end of which is inserted into the aforementioned lower shell; Side, the other end protrudes beyond the upper shell; an oil-impregnated bearing with a bearing hole and sleeved on the outside of the support shaft; a rotor assembly sleeved and combined with the outer edge of the oil-impregnated bearing; a limiting element sleeved on the outer edge of the oil-impregnated bearing The outer edge of the support shaft is close to the upper end of the oil-impregnated bearing; a thrust element is sleeved on the outer edge of the support shaft and is close to the lower end of the oil-impregnated bearing; and a certain sub-set is arranged on the lower shell and adjacently surrounds the outer end of the oil-impregnated bearing It is not in contact with the oil-impregnated bearing. With the above structure, when downward pressure is generated, the two ends of the support shaft respectively contact the operating area of the electronic device and the inside of the housing to prevent the downward pressure from being transmitted to the guide rotor group or the upper housing, causing the fan to stop rotating or deform and damage, thereby Achieve the purpose of preventing the fan from being pressed.

The above-mentioned objects and structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings. Please refer to Figure 1A, Figure 1B, Figure 1C and Figure 1D, which are the exploded schematic diagram, combined schematic diagram, cross-sectional schematic diagram, and partial schematic diagram of Figure 1C of the first embodiment of the present invention. The present invention mainly includes a frame 1 , A support shaft 2, an oil-impregnated bearing 3, a rotor group 4, a limit element 5, a thrust element 6 and a fixed subgroup 7: The fan frame 1 includes an upper shell 11 and a lower shell 12. The outer edge of the lower shell 12 extends vertically with a side wall 121 and surrounds an air outlet 14 formed thereon. An air inlet 13 is provided on the upper shell 11, the upper shell 11 and the The side walls 121 of the lower shell 12 are combined to define a fan area 15 and a flow channel area 16. The flow channel area 16 is provided with at least one supporting column 17, and both ends of the supporting column 17 abut the upper shell 11 and the The lower shell 12 supports the flow channel area 16, the air inlet 13 is located above the fan blade area 15, the lower shell 12 has a base 122, the support shaft 2 is disposed on the base 122, and the base The base 122 has a lower end surface 1221, and the stator assembly 7 surrounds the outer edge of the base 122 adjacently. The support shaft 2 has a coupling section 21, a protruding section 22, and a protruding section 23. The coupling section 21 is disposed on the base 122. The protruding section 22 and the protruding section 23 face the upper shell 11, and The protruding section 23 protrudes from the air inlet 13, the coupling section 21 has an abutting surface 211, and the protruding section 23 has an abutting surface 231. The oil-containing bearing 3 has a bearing hole 31 and is sleeved on the protruding section 22 of the supporting shaft 2. The rotor assembly 4 is sleeved and coupled to the outer edge of the oil-containing bearing 3, the rotor assembly 4 includes a hub 41 sleeved and coupled to the outer edge of the oil-containing bearing 3; a plurality of blades 42 respectively extend outward from the outer periphery of the hub 41; And a magnetic element 43 is arranged on the inner periphery of the hub 41 and horizontally opposite to the stator assembly 7. The magnetic element 43 is, for example, a ring magnet. The limiting element 5 is sleeved on the protruding section 22 of the supporting shaft 2 and is close to the upper end of the oil bearing 3, and the limiting element 5 is a C-shaped buckle ring or an O-shaped buckle ring. The thrust element 6 is sleeved on the protruding section 22 of the support shaft 2 and is close to the lower end of the oil-impregnated bearing 3. The thrust element 6 has a first surface 61 and a second surface 62, and the first surface 61 has A groove portion 611, the first surface 61 faces the oil-containing bearing 3, and the second surface 62 faces the lower shell 12. The stator assembly 7 is arranged on one side of the lower shell 12 and adjacently surrounds the outer edge of the oil-impregnated bearing 3 without contacting the oil-impregnated bearing 3. The stator assembly 7 includes a circuit board 71; a stator body 72 is arranged on the The circuit board 71 is composed of a plurality of silicon steel sheets stacked in sequence. The stator body 72 has a shaft hole 721 and a plurality of poles 722; and a plurality of coils 73 are respectively disposed on the poles 722. It should be particularly noted that the oil-impregnated bearing 3, the limiting element 5, and the thrust element 6 are disposed on the protruding section 22, and the support column 17 has two ends that abut the upper shell 11 and the lower shell 12, respectively. An inner surface of the upper shell 11 and an outer surface of the lower shell 12 are respectively provided with an upper shell protrusion 18 and a lower shell protrusion 19 corresponding to the two ends of the support column 17, the upper shell protrusion 18 has a top The contact surface 181 is aligned with the contact surface 231 of the protruding section 23 of the support shaft 2, the lower end surface 1221 of the base is provided with the lower shell protrusion 19, the contact surface 211 of the coupling section 21 and the lower end surface 1221 of the base In contact with the lower shell protrusion 19, the lower shell protrusions 19 have a bottom contact surface 191, and the bottom contact surfaces 191 are aligned with each other. Please also refer to Figure 5, which is a cross-sectional schematic diagram of the application of the present invention to electronic devices, and supplemented by referring to Figures 1A to 1D. The fan in this case is provided in an electronic device to help internal heating elements dissipate heat. The device diagram in this case represents a laptop, but it is not limited to this. It can also be a tablet computer or a mobile phone or a handheld game console. In this embodiment, an external unit 8a is a keyboard, but in other embodiments, it is a touch panel or a touch panel. The board or casing is located above the fan frame 10, and the abutting surface 231 of the protruding section 23 and the top abutting surface 181 of the upper shell protrusion 18 receive an external unit 8a, and form a first axial space S1 in Between the external unit 8 and the fan frame 1, when the external unit 8a of the electronic device is used to generate down force, the runner area 16 is supported through the support column 17 and the support shaft 2 supports the fan area 15 and maintains the axial direction. The space S, and the first axial space S1 provides the outer unit 8a being pressed to produce a short depression and slight deformation space, so as to prevent the outer unit 8a from being pressed against the oil bearing 3, the hub 41 and the upper shell 11, so as to ensure that the hub 41 rotates. The rotation of the upper shell 11 will not be stopped due to pressure, and the upper shell 11 will not deform and interfere with the rotation of the blade 42. Furthermore, the lower shell protrusions 19 abut against another external unit 8b located under the fan frame 1 in this embodiment, for example, a case, but in other embodiments, for example, a touch panel or a touch pad or a keyboard. A second axial space S2 is formed between the other external unit 8b and the lower shell 12 of the fan frame 1. This prevents another external unit 8b from compressing the fan region 15 or the runner region 16 in the fan frame 1, preventing the hub 41 from being compressed and unable to operate and/or preventing the runner region 16 from being compressed and deformed In addition, the groove portion 611 on the first surface 61 of the thrust element 6 is matched with the groove portion 611 to generate a fluid thrust when the oil-impregnated bearing 3 rotates, so that the oil-impregnated bearing 3 and the thrust element 6 are kept together. The clearance prevents the oil bearing 3 from shaking in the axial direction of the supporting shaft 2 when the oil bearing 3 rotates, which affects the stability and contact wear during rotation. Please refer to Figures 2A and 2B, which are cross-sectional schematic diagrams and partial schematic diagrams of the second embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is substantially the same as the first embodiment, so it is the same The details are not repeated here. The main difference is that another thrust element 6a is arranged between the oil-impregnated bearing 3 and the limiting element 5. The first surface 61a of the thrust element 6a faces the oil-impregnated bearing 3, and the second surface 62a Toward the limiting element 5, the first surface 61a has a groove portion 611a. When the oil-impregnated bearing 3 rotates, the groove parts 611, 611a will generate a fluid thrust, so that the oil-impregnated bearing 3 and the thrust element 6, 6a maintain a gap, respectively, to prevent the oil-impregnated bearing 3 from shaking in the axial direction of the support shaft 2 when it rotates. Affects stability and contact wear during rotation, and achieves bidirectional stability. Please refer to Figures 3A and 3B, which are cross-sectional schematic diagrams and partial schematic diagrams of the third embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is substantially the same as the first embodiment, so it is the same The details are not repeated here. The main difference is that the support column 17 of this embodiment is directly coupled to the lower shell 12, and the lower shell 12 has a shaft barrel 123. The stator assembly 7 is adjacently surrounding the outer edge of the shaft barrel 123, thereby eliminating了base 122. In addition, although only one thrust element 6 is used in the figure of the third embodiment, it can actually be used in conjunction with the technical features of the second embodiment. Another thrust element is provided between the oil-impregnated bearing 3 and the limiting element 5. Component 6a (please refer to Figure 2A and Figure 2B) achieves bidirectional stability. Figure 4 is a partial schematic diagram of the fourth embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is roughly the same as the first embodiment, so the same parts will not be repeated here. The main difference lies in this embodiment. For example, the upper end surface 32 of the oil-impregnated bearing 3 is provided with a groove portion 321 and the lower end surface 33 is provided with a groove portion 331, so that when the oil-impregnated bearing 3 rotates, a fluid thrust is generated, so that the oil-impregnated bearing 3 directly interacts with the thrust element 6 and the base. 122 maintains a gap, thereby eliminating the thrust element 6. In addition, although the fan frame 1 used in the figure of the fourth embodiment has a base 122, it can actually be used in conjunction with the technical feature of the third embodiment without the base 122. In summary, the present invention has the following advantages: 1. Prevent external units from oppressing the rotor group and or the runners in the fan frame: 2. Maintain the first and second axial spaces between the external unit and the hub, and at least prevent the rotor assembly from being compressed by the external unit; 3. Maintain the first and second axial spaces between the external unit and the lower shell of the fan frame to prevent the flow channel from being compressed by the external unit. The present invention has been described in detail above, but what is described above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention. That is to say, all equal changes and modifications made in accordance with the scope of the application of the present invention should still be covered by the patent of the present invention.

1: fan frame 11: Upper shell 12: Lower shell 121: sidewall 122: Pedestal 1221: Lower end of the base 123: Shaft tube 13: Air inlet 14: Air outlet 15: Fan blade area 16: runner area 17: Support column 18: Upper shell convex 181: top joint 19: Lower shell convex 191: Bottom Joint 2: Support shaft 21: Combined segment 211: contact surface 22: Convex section 23: protruding section 231: contact surface 3: Oil bearing 31: Bearing hole 32: Upper end face 321: Groove 33: Lower end 331: Groove 4: Rotor group 41: Wheel hub 42: blade 43: Magnetic components 5: Limiting element 6, 6a: Thrust element 61, 61a: First side 611, 611a: groove part 62, 62a: second side 7: stator group 71: circuit board 72: stator body 721: Shaft Hole 722: pole 73: Coil 8a, 8b: external unit S1: first axial space S2: second axial space

Figure 1A is an exploded schematic diagram of the first embodiment of the present invention; Figure 1B is a schematic diagram of the combination of the first embodiment of the present invention; Figure 1C is a schematic cross-sectional view of the first embodiment of the present invention; Figure 1D is a partial schematic diagram of Figure 1C; Figure 2A is a schematic cross-sectional view of the second embodiment of the present invention; Figure 2B is a partial schematic diagram of the second embodiment of the present invention; Figure 3A is a schematic cross-sectional view of a third embodiment of the present invention; Figure 3B is a partial schematic diagram of the third embodiment of the present invention; Figure 4 is a partial schematic diagram of a fourth embodiment of the present invention; Figure 5 is a schematic cross-sectional view of the present invention applied to an electronic device.

1221: Lower end of the base

17: Support column

18: Upper shell convex

181: top joint

19: Lower shell convex

191: Bottom Joint

211: contact surface

231: contact surface

3: Oil bearing

41: Wheel hub

42: blade

8a, 8b: external unit

S1: first axial space

S2: second axial space

Claims (14)

An anti-pressing fan structure, which comprises: A frame with an upper shell and a lower shell, and the upper shell has an air inlet; A support shaft, one end is inserted into one side of the aforementioned lower shell, and the other end protrudes beyond the upper shell; An oil-impregnated bearing with a bearing hole and sleeved on the outside of the support shaft; A rotor group, sleeved and combined with the outer edge of the oil-impregnated bearing; A limiting element, sleeved on the outer edge of the support shaft and close to the upper end of the oil-impregnated bearing; A thrust element sleeved on the outer edge of the support shaft and close to the lower end of the oil-impregnated bearing; and A certain sub-group is arranged on the lower shell and adjacently surrounds the outer edge of the oil-impregnated bearing and does not contact the oil-impregnated bearing. According to the anti-pressing fan structure described in item 1 of the scope of patent application, the support shaft has a coupling section, a protruding section and a protruding section, the coupling section is disposed on the lower shell, the protruding section and the supporting end Facing the upper shell, the protruding section protrudes from the air inlet, the oil-impregnated bearing, the limiting element and the thrust element are arranged on the protruding section, and the protruding section has an abutting surface. In the anti-pressing fan structure described in item 2 of the scope of the patent application, the lower shell has a base, the connecting section of the supporting shaft is disposed on the base, the stator group is adjacently surrounding the outer edge of the base, and the The base has a lower end surface of the base. According to the anti-pressing fan structure described in item 3 of the scope of patent application, the outer edge of the lower shell extends vertically with a side wall and surrounds to form an air outlet, and the combination of the side walls of the lower shell jointly defines a fan area and a first channel area, The flow channel area is provided with at least one supporting column, and the supporting column has an inner surface that abuts the upper shell and the lower shell at both ends, and an upper shell convex body is respectively provided on an outer surface of the upper shell and the lower shell And the lower shell convex body correspond to the two ends of the support column, the upper shell convex body has a top contact surface aligned with the abutting surface of the protruding section of the support shaft, the abutting surface of the protruding section and the upper shell convex A top surface of the body accepts an external unit and forms a first axial space between the external unit and the fan frame. The lower shell convex body has a bottom surface, a lower end surface of the base and the bottom surface Accept another external unit and form a second axial space between the other external unit and the fan frame. According to the anti-pressing fan structure described in item 4 of the scope of patent application, the lower end surface of the base is provided with the lower shell protrusion, an abutting surface of the coupling section and the lower end surface of the base are in contact with the lower shell protrusion . According to the anti-pressing fan structure described in claim 1, wherein the thrust element has a first surface and a second surface, the first surface has a groove portion, and the first surface faces the oil-impregnated bearing, The second surface faces the lower shell. The anti-pressing fan structure described in item 5 of the scope of patent application, wherein another thrust element is arranged between the oil-impregnated bearing and the limiting element, the first surface of the thrust element faces the oil-impregnated bearing, and the second surface Towards the limiting element. In the anti-pressing fan structure described in item 1 of the scope of patent application, the limiting element is a C-shaped buckle or an O-shaped buckle. An anti-pressing fan structure, which comprises: A frame with an upper shell and a lower shell, and the upper shell has an air inlet; A support shaft, one end is inserted into one side of the aforementioned lower shell, and the other end protrudes beyond the upper shell; An oil-impregnated bearing with a bearing hole and sleeved on the outside of the support shaft; the upper and lower end faces of the oil-impregnated bearing respectively have a groove; A rotor group, sleeved and combined with the outer edge of the oil-impregnated bearing; A limiting element sleeved on the outer edge of the supporting shaft and close to the upper end of the oil-impregnated bearing; and A certain sub-group is arranged on the lower shell and adjacently surrounds the outer edge of the oil-impregnated bearing and does not contact the oil-impregnated bearing. The anti-pressing fan structure described in item 9 of the scope of patent application, wherein the support shaft has a coupling section, a protruding section and a protruding section, the coupling section is disposed on the lower shell, the protruding section and the supporting end Facing the upper shell, the protruding section protrudes from the air inlet, the oil-impregnated bearing, the limiting element and the thrust element are arranged on the protruding section, and the protruding section has an abutting surface. According to the anti-pressing fan structure described in item 10 of the scope of patent application, the lower shell has a base, the connecting section of the supporting shaft is disposed on the base, the stator group is adjacently surrounding the outer edge of the base, and the The base has a lower end surface of the base. The anti-pressing fan structure described in item 11 of the scope of patent application, wherein the outer edge of the lower shell extends vertically with a side wall and surrounds to form an air outlet, and the combination of the side walls of the lower shell jointly defines a fan zone and a first channel zone, The flow channel area is provided with at least one supporting column, and the supporting column has an inner surface that abuts the upper shell and the lower shell at both ends, and an upper shell convex body is respectively provided on an outer surface of the upper shell and the lower shell And the lower shell convex body correspond to the two ends of the support column, the upper shell convex body has a top contact surface aligned with the abutting surface of the protruding section of the support shaft, the abutting surface of the protruding section and the upper shell convex A top surface of the body accepts an external unit and forms a first axial space between the external unit and the fan frame. The lower shell convex body has a bottom surface, a lower end surface of the base and the bottom surface Accept another external unit and form a second axial space between the other external unit and the fan frame. According to the anti-pressing fan structure described in item 12 of the scope of patent application, wherein the lower end surface of the base is provided with the lower shell convex body, an abutting surface of the coupling section and the lower end surface of the base are in contact with the lower shell convex body . In the anti-pressing fan structure described in item 9 of the scope of patent application, the limiting element is a C-shaped buckle or an O-shaped buckle.

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