Heat dissipation device

Abstract

A heat dissipation device includes a fan frame, fan blades, a driving component, a light-emitting element, a light guide member, and a decorative plate. The fan blades are rotatably disposed on the fan frame through bearings. The driving component includes a driving circuit board, a stator, and a rotor. The driving circuit board is disposed on the fan frame. The stator is mounted on the driving circuit board. The rotor is mounted on the fan blades. The light-emitting element is mounted on the driving circuit board. The light guide member includes a light-emitting portion and a light-incident portion. The light-emitting portion is stacked on a side of the stator of the driving component away from the driving circuit board. The light-incident portion protrudes from the light-emitting portion and extends toward the light-emitting element on the driving circuit board. The decorative plate includes a connected plate body and a support column. The plate body is connected to the bottom plate through the support column and is fixed relative to the fan blades. The plate body covers the fan blades and has markings.

Description

Technical Field

[0001] The present invention relates to a heat dissipation device, and particularly to a heat dissipation device in which a decorative plate is fixed relative to a fan blade. Background Art

[0002] With the improvement of the processing speed and performance of electronic devices such as central processing units, more heat is generated when the electronic devices are operating. The generated heat causes the temperature of the electronic device to rise, and if the heat cannot be effectively discharged to the outside, the reliability and performance of the electronic device will decline. In order to prevent the electronic device from overheating, a heat dissipation device such as a fan is used to effectively dissipate the heat generated by the electronic device, thereby ensuring the normal operation of the electronic device.

[0003] In the case of using a fan or other rotating cooling device, identification marks such as brand patterns, design patterns or other patterns are printed on the fan blade for the user to identify the brand or manufacturer of the fan. However, for the user, such identification marks are difficult to identify as the fan blade rotates.

[0004] Practical Invention Content

[0005] The purpose of the present invention is to provide a heat dissipation device, so that the user can clearly identify the identification mark when the fan blade rotates.

[0006] The heat dissipation device disclosed in an embodiment of the present invention includes a fan frame, a fan blade, a driving component, at least one light-emitting element, a light guide member and a decorative plate. The fan frame includes a bottom plate and a bearing sleeve, and the bearing sleeve is connected to the bottom plate. The fan blade includes a hub and a plurality of blades. These blades are connected to the hub. The fan blade is rotatably disposed on the fan frame through at least one bearing. At least one bearing is located between the bearing sleeve and the hub. The driving component includes a driving circuit board, a stator and a rotor. The driving circuit board is disposed on the bottom plate of the fan frame. The stator is mounted on the driving circuit board. The rotor is mounted on the hub of the fan blade. At least one light-emitting element is mounted on the driving circuit board. The light guide member includes a light-emitting portion and at least one light-incident portion. The light-emitting portion is stacked on the side of the stator of the driving component away from the driving circuit board. The light-incident portion protrudes from the light-emitting portion and extends toward the light-emitting element on the driving circuit board. The decorative plate includes a plate body and a pillar extending from the plate body. The plate body is connected to the bottom plate through the pillar and is fixed relative to the fan blade. The plate body covers the hub and has a mark, and the light emitted by the light-emitting element is used to irradiate the mark through the light guide member.

[0007] Another embodiment of the present invention discloses a heat dissipation device, which includes a fan frame, a fan blade, a driving component, at least one light-emitting element, a light guide member and a decorative plate. The fan frame includes a bottom plate and a bearing sleeve. The bearing sleeve is connected to the bottom plate. The fan blade includes a hub and a plurality of blades. These blades are connected to the hub. The fan blade is rotatably arranged on the fan frame through at least one bearing. At least one bearing is located between the bearing sleeve and the hub. The driving component includes a driving circuit board, a stator and a rotor. The driving circuit board is arranged on the bottom plate of the fan frame. The stator is mounted on the driving circuit board. The rotor is mounted on the hub of the fan blade. The light-emitting element includes an extended circuit board and a light source. The extended circuit board is mounted on a side of the driving circuit board away from the bottom plate and extends in a direction away from the bottom plate. The light source is arranged on the extended circuit board. The light guide member is stacked on a side of the stator of the driving component away from the driving circuit board. The decorative plate includes a plate body and a pillar extending from the plate body. The plate body is connected to the bottom plate through the pillar and is fixed relative to the fan blade. The plate body covers the hub and has a mark, and the light emitted by the light source is used to irradiate the mark through the light guide member.

[0008] For the heat dissipation device according to the above embodiment, by fixing the decorative plate to the stationary pillar instead of the hub of the fan blade, when the fan blade rotates relative to the fan frame, the decorative plate with the mark can maintain a fixed position, so that the user can clearly identify the mark on the decorative plate.

[0009] In addition, by directly contacting the light-emitting element with the driving circuit board, the wiring difficulty between the light-emitting element and the driving circuit board is reduced. For another example, the gap between the light-emitting element and the light guide member is reduced through the design of the extended circuit board or the light incident part, thereby further improving the light-emitting efficiency of the light-emitting element.

[0010] The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention. Description of the Drawings

[0011] Figure 1 A three-dimensional schematic diagram of a heat dissipation device according to an embodiment of the present invention;

[0012] Figure 2 For Figure 1 exploded schematic diagram;

[0013] Figure 3 For Figure 2 partial enlarged schematic diagram;

[0014] Figure 4 For Figure 1 sectional schematic diagram;

[0015] Figure 5 A sectional schematic diagram of a heat dissipation device according to an embodiment of the present invention;

[0016] Figure 6is Figure 5 exploded view of the heat dissipation device;

[0017] Figure 7 is Figure 6 partial enlarged view of.

[0018] Among them, reference numerals

[0019] heat dissipation devices 10, 10a

[0020] fan brackets 100, 100a

[0021] bottom plates 110, 110a

[0022] annular side plates 120, 120a

[0023] bearing sleeves 130, 130a

[0024] fan blades 200, 200a

[0025] hub wheels 210, 210a

[0026] cover plates 211, 211a

[0027] annular outer plates 212, 212a

[0028] middle tubes 213, 213a

[0029] blades 220, 220a

[0030] bearings 250, 250a

[0031] hollow columns 260, 260a

[0032] drive components 300, 300a

[0033] drive circuit boards 310, 310a

[0034] stators 320, 320a

[0035] fixing brackets 321, 321a

[0036] iron cores 322, 322a

[0037] coils 323, 323a

[0038] rotors 330, 330a

[0039] light-emitting elements 400, 400a

[0040] expansion circuit board 410a

[0041] light source 420a

[0042] light guide members 500, 500a

[0043] Light output part 510

[0044] Light input part 520

[0045] Decorative plates 600, 600a

[0046] Plate bodies 610, 610a

[0047] Markings 611, 611a

[0048] Supports 620, 620a

[0049] Spacers 650, 650a

[0050] Buckles 660, 660a

[0051] Opening O Detailed implementation manners

[0052] The structural principle and working principle of the present invention will be specifically described below in conjunction with the accompanying drawings:

[0053] The embodiments disclosed herein are related to a heat dissipation device with an identification mark, and this identification mark is fixed relative to the moving part of the heat dissipation device. In this way, the user can easily identify the brand or manufacturer of the heat dissipation device. For example, in the case of using a fan or other rotating heat dissipation device, the identification mark is set on a plate body that is fixed relative to the rotating fan blade. It should be noted that although the following disclosed exemplary embodiments are described by taking a fan as an example, these exemplary embodiments are not limited thereto; without departing from the spirit and scope of the present invention, these exemplary embodiments are also applicable to other types of rotating heat dissipation devices.

[0054] Please refer to Figures 1 to 2 , Figure 1 is a three-dimensional schematic diagram of a heat dissipation device according to an embodiment of the present invention. Figure 2 is Figure 1 exploded schematic diagram of. In the exemplary embodiment, the heat dissipation device 10 is a fan. However, the principle disclosed herein can also be applied to other types of heat dissipation devices. The heat dissipation device 10 includes a fan frame 100, a fan blade 200, a driving component 300, a plurality of light-emitting elements 400, a light guide member 500, and a decorative plate 600.

[0055] Please refer to Figures 2 to 4 , Figure 3 is Figure 2 partial enlarged schematic diagram of. Figure 4 is Figure 1 cross-sectional schematic diagram of.

[0056] The fan bracket 100 includes a bottom plate 110, an annular side plate 120, and a bearing sleeve 130. The annular side plate 120 is connected to the periphery of the bottom plate 110 and extends vertically from the bottom plate 110. The bearing sleeve 130 is connected to the central portion of the bottom plate 110 and extends vertically from the bottom plate 110. That is, the annular side plate 120 is disposed around the peripheral area of the heat dissipation device 10 and surrounds the bearing sleeve 130.

[0057] The fan blade 200 is rotatably disposed on the bearing sleeve 130. The fan blade 200 includes a hub 210 and a plurality of blades 220 radially extending from the hub 210. In one embodiment, the blades 220 are in a curved shape or an arched (or bow-shaped) structure with the reverse facing the rotation direction of the blades 220. The hub 210 includes a cover plate 211, an annular outer side plate 212, and a middle tube 213. The cover plate 211 is horizontally disposed on the bottom plate 110 and has a plurality of openings O. The annular outer side plate 212 and the middle tube 213 are radially spaced from each other.

[0058] These blades 220 are connected to the annular outer side plate 212 and extend from the radially outer surface of the annular outer side plate 212. The fan blade 200 is disposed on the bottom plate 110 of the fan bracket 100 through a bearing 250 and a hollow column 260. Specifically, the hollow column 260 is installed on the bottom plate 110 of the fan bracket 100 and is surrounded by the bearing sleeve 130 inside. The bearing 250 is clamped between the hollow column 260 and the bearing sleeve 130 so that the hollow column 260 can rotate relative to the bearing sleeve 130 through the bearing 250. The middle tube 213 of the fan blade 200 is installed on the hollow column 260 so that the fan blade 200 can rotate relative to the fan bracket 100.

[0059] The drive assembly 300 includes a drive circuit board 310, a stator 320, and a rotor 330. The drive circuit board 310 of the drive assembly 300 is disposed on the bottom plate 110. The stator 320 includes a fixing frame 321, a plurality of iron cores 322, and a plurality of coils 323. The fixing frame 321 is erected on the drive circuit board 310. These iron cores 322 are installed on different sides of the fixing frame 321, and these coils 323 are respectively disposed on these iron cores 322. The rotor 330 is, for example, a magnet and is disposed on the hub 210 of the fan blade 200. The rotor 330 is paired with the stator 320. When the drive circuit board 310 guides electric power to flow through these coils 323 of the stator 320, the rotor 330 will rotate relative to the stator 320 and drive the fan blade 200 to rotate relative to the fan bracket 100.

[0060] These light-emitting elements 400 are, for example, light-emitting diodes and are disposed on one side of the drive circuit board 310 close to the cover plate 211 of the hub 210. These light-emitting elements 400 are used to emit light, and these lights are used to pass through these openings O.

[0061] In this embodiment, the number of light-emitting elements 400 is plural, but is not limited thereto. In other embodiments, the number of light-emitting elements may also be only one.

[0062] The light guide member 500 includes a light-emitting portion 510 and a plurality of light-incident portions 520. The light-emitting portion 510 is stacked on the side of the stator 320 of the driving assembly 300 away from the driving circuit board 310. Further, the light-emitting portion 510 is located between the cover plate 211 of the hub 210 and the fixing bracket 321 of the stator 320, and is stacked on the fixing bracket 321 of the stator 320. The light-incident portion 520 protrudes from the light-emitting portion 510 and extends toward the light-emitting element 400 on the driving circuit board 310. The light emitted by the light-emitting element 400 enters from the light-incident portion 520 of the light guide member 500, and is guided by the light-incident portion 520 and emitted from the light-emitting portion 510 of the light guide member 500.

[0063] The decorative plate 600 includes a plate body 610 and a support column 620 extending from the plate body 610. The support column 620 passes through the hollow column 260, and one end is fixed to the bottom plate 110 by a snap ring 660, and the other end is connected to the decorative plate 600, so that the plate body 610 is connected to the bottom plate 110 through the support column 620 and is fixed relative to the fan blade 200. In addition, the plate body 610 is stacked on the hollow column 260 through a spacer 650.

[0064] The plate body 610 can be connected to the support column 620 by various bonding means. For example, the plate body 610 is fixed by nuts and bolts, screws, pins, rivets, fixed anchors, stitching, folding, buckles, shrink fitting, magnetic attraction, snap fasteners, the above combinations or similar means. The plate body 610 has a mark 611. The light emitted by the light-emitting element 400 is used to irradiate the mark 611 through the light guide member 500 and the opening O of the cover plate 211 of the hub 210.

[0065] The plate body 610 is made of a light-transmissive material such as a transparent or translucent material, where the transparent or translucent material includes acrylic, glass, plastic, etc., and the mark 611 is formed by a painting process. Briefly, in the painting process, a mask including the pattern of the mark 611 is disposed on the plate body 610. Then, the portion of the plate body 610 not covered by this pattern is painted and becomes opaque. In one embodiment, as shown in the figure, the shape of the mark 611 is taken as the English letter "A" as an example, but is not limited thereto. In other embodiments, the mark may also be a brand name, a brand pattern or any desired mark.

[0066] In one embodiment, the support column 620 can be made of a light-transmissive material, where the transparent material is, for example, acrylic, glass, plastic, etc. However, in other embodiments, the support column can also be made of an opaque material.

[0067] In one embodiment, the plate body can also be made by insert molding, with one end of the support pillar covered therein, so that the support pillar is fixed to the plate body, and the above-described bonding means is not limited thereto.

[0068] When the driving component 300 drives the fan blade 200 to rotate, the plate body 610 is fixed to the support pillar 620 and thus remains stationary, and the light emitted by the light-emitting element 400 is emitted from the light-emitting portion 510 of the light guide member 500 and irradiates the mark 611 on the plate body 610. Therefore, the user can more clearly identify the mark 611.

[0069] In one embodiment, the hub and the blades of the fan blade can also be made of light-transmitting materials such as acrylic, glass, plastic and their analogs. Therefore, the light emitted from the light-emitting element can irradiate at least part or all of these blades through the hub.

[0070] Please refer to Figures 5 to 7 , Figure 5 is a cross-sectional schematic view of a heat dissipation device according to an embodiment of the present invention. Figure 6 is Figure 5 exploded schematic view of the heat dissipation device. Figure 7 is Figure 6 partial enlarged schematic view of.

[0071] In an exemplary embodiment, the heat dissipation device 10a is a fan. However, the principles disclosed herein can also be applied to other types of heat dissipation devices. The heat dissipation device 10a includes a fan frame 100a, a fan blade 200a, a driving component 300a, a plurality of light-emitting elements 400a, a light guide member 500a and a decorative plate 600a.

[0072] The fan frame 100a includes a bottom plate 110a, an annular side plate 120a and a bearing sleeve 130a. The annular side plate 120a is connected to the periphery of the bottom plate 110a and extends vertically from the bottom plate 110a. The bearing sleeve 130a is connected to the central portion of the bottom plate 110 and extends vertically from the bottom plate 110a. That is to say, the annular side plate 120a is disposed around the peripheral area of the heat dissipation device 10a and surrounds the bearing sleeve 130a.

[0073] The fan blade 200a is rotatably disposed on the bearing sleeve 130a. The fan blade 200a includes a hub 210a and a plurality of blades 220a radially extending from the hub 210a. In one embodiment, the blade 220a is a curved or arched (or bow-shaped) structure that is reverse-facing the rotation direction of the blade 220a. The hub 210a includes a cover plate 211a, an annular outer side plate 212a and a middle tube 213a. The cover plate 211a is horizontally disposed on the bottom plate 110a and has a plurality of openings O. The annular outer side plate 212a and the middle tube 213a are radially spaced from each other.

[0074] These blades 220a are connected to the annular outer plate 212a and extend from the radially outer surface of the annular outer plate 212a. The fan blade 200a is disposed on the bottom plate 110a of the fan frame 100a through a bearing 250a and a hollow column 260a. Specifically, the hollow column 260a is installed on the bottom plate 110a of the fan frame 100a and is surrounded by the bearing sleeve 130a inside. The bearing 250a is clamped between the hollow column 260a and the bearing sleeve 130a so that the hollow column 260a can rotate relative to the bearing sleeve 130a through the bearing 250a. The middle tube 213a of the fan blade 200a is installed on the hollow column 260a so that the fan blade 200a can rotate relative to the fan frame 100a.

[0075] The driving assembly 300a includes a driving circuit board 310a, a stator 320a and a rotor 330a. The driving circuit board 310a of the driving assembly 300a is disposed on the bottom plate 110a. The stator 320a includes a fixing frame 321a, a plurality of iron cores 322a and a plurality of coils 323a. The fixing frame 321a is mounted on the driving circuit board 310a. These iron cores 322a are installed on different sides of the fixing frame 321a, and these coils 323a are respectively disposed on these iron cores 322a. The rotor 330a is, for example, a magnet and is disposed on the hub 210a of the fan blade 200a. The rotor 330a is paired with the stator 320a. When the driving circuit board 310a guides electric power to flow through these coils 323a of the stator 320a, the rotor 330a will rotate relative to the stator 320a to drive the fan blade 200a to rotate relative to the fan frame 100a.

[0076] Each light-emitting element 400a includes an extended circuit board 410a and two light sources 420a. The extended circuit board 410a is mounted on the side of the driving circuit board 310a away from the bottom plate 110a and extends in a direction away from the bottom plate 110a. The two light sources 420a are respectively disposed on opposite sides of the extended circuit board 410a. The light source 420a is, for example, a light-emitting diode and is used to emit light, and this light is used to pass through these openings O.

[0077] In this embodiment, the number of the light-emitting elements 400a is multiple, but it is not limited thereto. In other embodiments, the number of the light-emitting elements may also be only one. In addition, in this embodiment, each extended circuit board 410a is paired with two light sources 420a, but it is not limited thereto. In other embodiments, each extended circuit board may also be only paired with a single light source.

[0078] The light guide member 500a is stacked on the side of the stator 320a of the driving assembly 300a away from the driving circuit board 310a. Further, the light guide member 500a is disposed between the cover plate 211a of the hub 210a and the fixing bracket 321a of the stator 320a, and is stacked on the fixing bracket 321a of the stator 320a. The light emitted by the light source 420a is guided by the light guide member 500a and then emitted toward the cover plate 211a of the wheel housing 210a.

[0079] The decorative plate 600a includes a plate body 610a and a support column 620a extending from the plate body 610a. The support column 620a passes through the hollow column 260a, and one end is fixed to the bottom plate 110a by a snap ring 660a, and the other end is connected to the decorative plate 600a, so that the plate body 610a is connected to the bottom plate 110a through the support column 620a and is fixed relative to the fan blade 200a. In addition, the plate body 610a is stacked on the hollow column 260a through a spacer 650a.

[0080] The plate body 610a can be connected to the support column 620a by various bonding means. For example, the plate body 610a is fixed by nuts and bolts, screws, pins, rivets, fixed anchors, stitching, folding, buckles, shrink fitting, magnetic attraction, snap fasteners, the above combinations or similar means. The plate body 610a has a mark 611a. The light emitted by the light source 420a is used to irradiate the mark 611a through the light guide member 500a and the opening O of the cover plate 211a of the hub 210a.

[0081] The plate body 610a is made of a light-transmissive material such as a transparent or translucent material, where the transparent or translucent material includes acrylic, glass, plastic, etc., and the mark 611a is formed by a painting process. Briefly, in the painting process, a mask including the pattern of the mark 611a is disposed on the plate body 610a. Then, the part of the plate body 610a not covered by this pattern is painted and becomes opaque. In one embodiment, as shown in the figure, the shape of the mark 611a is taken as the English letter "A" as an example, but it is not limited thereto. In other embodiments, the mark may also be a brand name, a brand pattern or any desired mark.

[0082] In one embodiment, the support column 620a can be made of a light-transmissive material, where the transparent material is, for example, acrylic, glass, plastic, etc. However, in other embodiments, the support column can also be made of an opaque material.

[0083] In one embodiment, the plate body can also be formed by injection molding, and one end of the support column is wrapped inside, so that the support column and the plate body are fixed, and it is not limited to the above bonding means.

[0084] When the driving component 300a drives the fan blade 200a to rotate, the plate body 610a is fixed to the support column 620a and thus remains stationary. The light emitted by the light-emitting element 400a is emitted from the light-emitting portion 510a of the light guide 500 and irradiates the mark 611a on the plate body 610a. Therefore, the user can more clearly identify the mark 611a.

[0085] In one embodiment, the hub and the blade of the fan blade can also be made of light-transmitting materials such as acrylic, glass, plastic, and their analogs. Therefore, the light emitted from the light-emitting element can irradiate at least part or all of these blades through the hub.

[0086] According to the heat dissipation device of the above embodiment, by fixing the decorative plate to the stationary support column instead of the hub of the fan blade, when the fan blade rotates relative to the fan frame, the decorative plate with the mark can remain stationary, so that the user can clearly identify the mark on the decorative plate.

[0087] In addition, by directly contacting the light-emitting element with the driving circuit board to reduce the wiring difficulty between the light-emitting element and the driving circuit board, and for another example, by expanding the design of the circuit board or the light-incident portion to reduce the gap between the light-emitting element and the light guide, the light-emitting efficiency of the light-emitting element can be further improved.

[0088] Of course, the present invention can also have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. A heat dissipation device, characterized in that, Comprising: A fan frame including a bottom plate and a bearing sleeve, the bearing sleeve being connected to the bottom plate; A fan blade including a hub and a plurality of blades, the blades being connected to the hub, the fan blade being rotatably disposed on the fan frame by at least one bearing, the at least one bearing being located between the bearing sleeve and the hub; A driving assembly including a driving circuit board, a stator and a rotor, the driving circuit board being disposed on the bottom plate of the fan frame, the stator being mounted on the driving circuit board, and the rotor being mounted on the hub of the fan blade; At least one light-emitting element mounted on the driving circuit board; A light guide member including a light-emitting portion and at least one light-incident portion, the light-emitting portion being stacked on a side of the stator of the driving assembly away from the driving circuit board, and the light-incident portion protruding from the light-emitting portion and extending toward the light-emitting element on the driving circuit board; And A decorative plate including a plate body and a pillar extending from the plate body, the plate body being connected to the bottom plate through the pillar and being fixed relative to the fan blade, the plate body covering the hub and having a mark, and the light emitted by the light-emitting element being used to irradiate the mark through the light guide member; Wherein, the hub includes a cover plate and an annular outer side plate, the annular outer side plate being connected to the cover plate and extending from a radially outer edge of the cover plate, the cover plate having at least one opening, and the light emitted by the light-emitting element being used to irradiate the mark through the at least one opening.

2. The heat dissipation device according to claim 1, wherein Further comprising a hollow column, the hollow column being disposed in the bearing sleeve, and at least a part of the pillar being located in the hollow column.

3. The heat dissipation device according to claim 2, characterized in that, The hub further includes a middle tube, the middle tube being connected to a radially inner edge of the cover plate and extending from the radially inner edge, and the middle tube surrounding the hollow column.

4. The heat dissipation device according to claim 1, wherein The plate body and the pillar are integrally formed.

5. The heat dissipation device according to claim 1, wherein The plate body is independent of the pillar and is connected to the pillar.

6. The heat dissipation device according to claim 1, characterized in that The plate body is magnetically adsorbed on the pillar.

7. A heat dissipation device, characterized in that, Comprising: A fan frame including a bottom plate and a bearing sleeve, the bearing sleeve being connected to the bottom plate; A fan blade including a hub and a plurality of blades, the blades being connected to the hub, the fan blade being rotatably disposed on the fan frame by at least one bearing, the at least one bearing being located between the bearing sleeve and the hub; A driving assembly including a driving circuit board, a stator and a rotor, the driving circuit board being disposed on the bottom plate of the fan frame, the stator being mounted on the driving circuit board, and the rotor being mounted on the hub of the fan blade; At least one light-emitting element including an extended circuit board and a light source, the extended circuit board being mounted on a side of the driving circuit board away from the bottom plate and extending in a direction away from the bottom plate, and the light source being disposed on the extended circuit board; A light guide member stacked on a side of the stator of the driving assembly away from the driving circuit board; and A decorative plate including a plate body and a pillar extending from the plate body, the plate body being connected to the bottom plate through the pillar and being fixed relative to the fan blade, the plate body covering the hub and having a mark, and the light emitted by the light source being used to irradiate the mark through the light guide member; Wherein, the hub includes a cover plate and an annular outer plate, the annular outer plate is connected to the cover plate and extends from the radial outer edge of the cover plate, the cover plate has at least one opening, and the light emitted by the light-emitting element is used to irradiate the mark through the at least one opening.

8. The heat dissipation device according to claim 7, wherein It further includes a hollow column, the hollow column is disposed within the bearing sleeve, and at least a portion of the strut is located within the hollow column.

9. The heat dissipation device according to claim 8, characterized in that, The hub further includes a middle tube, the middle tube is connected to the radial inner edge of the cover plate and extends from the radial inner edge, and the middle tube surrounds the hollow column.

10. The heat dissipation device according to claim 7, characterized in that, The plate body is integrally formed with the strut.

11. The heat dissipation device according to claim 7, wherein The plate body is independent of the strut and is connected to the strut.

12. The heat dissipation device according to claim 7, wherein The plate body is magnetically adsorbed to the strut.

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