CN112654195A

CN112654195A - Dust cover and heat dissipation device

Info

Publication number: CN112654195A
Application number: CN202110051661.7A
Authority: CN
Inventors: 南景洋; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2021-04-13
Anticipated expiration: 2038-01-10
Also published as: CN112654195B; WO2019136829A1; CN110022654B; CN110022654A

Abstract

The dust cover and the heat dissipation device comprise a cover body, a dust cover arranged in the cover body and a telescopic pressure rod assembly used for detachably installing the dust cover in the cover body. The dustproof cover can achieve the dustproof effect on the heat dissipation airflow of the heat dissipation device, and is convenient to detach, replace and maintain.

Description

Dust cover and heat dissipation device

The application is a divisional application with the application number of 201810024609.0, the application date of 2018, 01, 10 and the name of "dust cover and heat dissipation device".

Technical Field

The present invention relates to a heat dissipation device and a fitting thereof, and more particularly, to a heat dissipation device and a dust cover thereof for use in a power module.

Background

At present, a heat dissipation device commonly used for electronic equipment is easy to influence the reliability of a product due to the entering of dust, impurities and the like in the heat dissipation process, and needs to be frequently disassembled and cleaned; the heat dissipation performance is generally taken as a limiting condition of product performance in various fields, for example, the biggest breakthrough of projection technology is the application of a laser light source, and the laser light source has obvious advantages compared with the traditional light source. In a laser projection device, a power module provides an energy source for a laser light source, and the power module generates heat when working, and generally dissipates heat in an air cooling mode. A fan is generally disposed on a housing of the power module, and the fan operates to draw air flow into the power module to dissipate heat of the components. However, the airflow usually contains impurities such as dust, and the impurities may be attached to the components after entering the power module, and may affect the normal operation of the components after a period of time. In practical application, the dustproof sponge of dust cover will regularly wash or change, and dust cover among the prior art is dismantled inconveniently, is unfavorable for the maintenance in later stage.

Therefore, there is a need to provide a new dust cover and a heat dissipation device to solve the above problems.

Disclosure of Invention

The embodiment of the invention provides a dust cover and a heat dissipation device, and aims to solve the problems that the heat dissipation device in the prior art is inconvenient to clean and disassemble and is not beneficial to subsequent maintenance.

To achieve the above object, an embodiment of the present invention provides a dust cover, which includes a cover body, a dust screen disposed in the cover body, and a retractable compression bar assembly for detachably mounting the dust screen in the cover body.

Preferably, the compression bar assembly comprises a fixed bar connected with the cover body, a guide bar rotatably connected with the fixed bar, and a driven bar connected with the fixed bar through a hinge and capable of rotating around the hinge under the driving of the guide bar.

Preferably, a plurality of concentric annular ventilation openings are formed in the cover body, and the dust screen covers the ventilation openings.

Preferably, the fixing rod is of a cross-shaped structure and comprises a central portion located in the center and cross-shaped fixing portions radially extending from the central portion to the periphery, the fixing rod is connected with the cover body through the fixing portions, and the guide rod is rotatably connected to the central portion.

Preferably, the end parts, far away from the central part, of the fixing parts are provided with press riveting nuts, the cover body is provided with through holes corresponding to the press riveting nuts, and the fixing rod is fixed on the cover body through screws penetrating through the through holes so as to tightly press the dustproof net.

Preferably, the dust cover further comprises a magnet with a stud, the stud is connected with the press riveting nut, and the magnet is used for connecting the dust cover with the heat dissipation fan.

Preferably, a knob which is linked with the guide rod is arranged on the central part, and the knob drives the guide rod to rotate along the circumferential direction by taking the central part as a rotating shaft.

Preferably, the guide bar is cross structure, includes along the center to the guide arm of radiation all around, be provided with on the driven lever with guide arm assorted slide rail, the guide bar passes through the slide rail promotes the driven lever around the hinge to cover body periphery extension and compress tightly the dust screen.

Preferably, the driven rod comprises a first driven rod and a second driven rod which are connected with two sides of the fixing rod respectively, one end of the first driven rod is connected with one end of the second driven rod, the other end of the first driven rod is connected with the other end of the second driven rod through a hinge, and the first driven rod and the second driven rod move relatively through the hinge.

Preferably, the compression bar assembly comprises a first state in which the driven bar is contracted inwards and a second state in which the driven bar is expanded outwards, and the guide arms comprise a first guide arm coinciding with the fixing portion and a second guide arm extending from the first guide arm in a bending manner in the second state, and the second guide arm pushes the driven bar through the slide rail.

Preferably, the first guide arm is provided with a locking hole, the fixing rod is provided with a threaded hole corresponding to the locking hole, and when the pressure lever assembly is in the second state, the locking of the pressure lever assembly is realized through a locking screw passing through the locking hole.

Preferably, sealing strips which are tightly attached to the inner surface of the cover body are arranged at four corners of the cover body.

The invention also provides a heat dissipation device, which comprises a heat dissipation fan and the dust cover.

Preferably, the dust cover includes a magnet, and the frame of the cooling fan is provided with a metal or magnetic member attracted to the magnet.

Drawings

FIG. 1 is a schematic structural view of a dust screen according to the present invention;

FIG. 2 is a schematic view of another angle of the dust screen of the present invention;

FIG. 3 is a schematic view of the structure of the boot body of the dust boot of the present invention;

FIG. 4 is a schematic view of another angle of the boot body of the dust boot of the present invention;

FIG. 5 is a schematic structural view of the strut assembly of the present invention in a first state;

FIG. 6 is a schematic view of another angle of the strut assembly of the present invention in the first position;

FIG. 7 is a schematic structural view of the strut assembly of the present invention in a second state;

FIG. 8 is a schematic view of another angle of the strut assembly of the present invention in a second state;

FIG. 9 is a side view of the strut assembly of the present invention;

fig. 10 is a schematic view of the structure of the magnet of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.

The invention provides a dust cover applied to a heat dissipation device and the heat dissipation device applying the dust cover. In particular to a heat dissipation device and a dust cover thereof applied to a power module in a laser light source. The fan is arranged in the heat dissipation device, air flow is sucked into the power supply module through the work of the fan, the heat generated by the power supply module in a working state can be reduced, and the heat dissipation of the power supply module is realized. In the working process of the heat dissipation device, the dust cover provided by the invention can prevent dust impurities and the like carried in airflow from entering the power module to influence the performance of a product.

As shown in fig. 1 and 2, the dust cover of the present invention includes a cover body 1, a dust screen 2 provided on the cover body 1, and a strut assembly 3 for fitting the dust screen 2 to the cover body 1.

As shown in fig. 3 and 4, the cover body 1 is made of an aluminum alloy sheet metal by bending, and includes a body portion and a bending portion 13 bent from the body portion and extending to enclose the internal space, the body portion of the cover body 1 is square, and a plurality of concentric annular ventilation openings are formed in the body portion, external air flows enter the heat dissipation device through the ventilation openings, and meanwhile, air flows with heat generated by a fan in the heat dissipation device are discharged through the ventilation openings. The outer diameter of the annular ventilation opening with the largest diameter on the cover body 1 is larger than the diameter of a circular surface formed by the rotation of the fan, so that the normal air flow can be ensured.

Four sealing strips 5 are arranged at the bent part 13 of the cover body 1, the sealing strips 5 are self-adhesive, can be adhered at the bent part 13 of the cover body, are made of sponge and have certain compression amount, and the thickness of the sealing strips is slightly larger than the gap between the inner surface of the bent part 13 of the cover body 1 and the power supply shell.

The dust screen 2 is dustproof sponge, and the setting is at the inside surface of the cover body 1 towards the fan, and the marginal diameter of dust screen 2 is greater than the biggest annular vent, and dustproof sponge covers the vent completely promptly. Thus, foreign substances or dust can be prevented from entering the inside of the heat sink.

As shown in fig. 5 to 9, the pressure lever assembly 3 is a link mechanism, a rectangular area surrounded by the bent portions 13 on four sides of the cover body 1 can cover a protection net of the fan, the area of the rectangular area is smaller than that of the dust screen 2, the pressure lever assembly 3 is mounted on the cover body 1 from the rectangular area surrounded by the bent portions 13 of the cover body 1, and the edge of the dust screen 2 is not pressed.

The compression bar component 3 comprises a first state of inward contraction and a second state of outward expansion, when the compression bar component 3 is in the second state of expansion, the edge of the compression bar component 3 is expanded, the limit position can cover the edge of the dustproof net 2, the edge of the dustproof sponge is compressed through fastening the second state, and the effect of fully filtering airflow is achieved.

Specifically, the compression bar assembly 3 comprises a fixed bar 31 connected with the cover 1, a guide bar 34 rotatably connected with the fixed bar 31, and driven bars (35, 36) connected with the fixed bar 31 through hinges 37 and capable of rotating around the hinges under the driving of the guide bar 34.

The fixing rod 31 is a cross structure and includes a central portion located at the center and fixing portions radially extending from the central portion to the periphery, and the fixing rod 31 is connected to the cover 1 through the fixing portions. Specifically, the fixing portion is provided with press-riveting nuts 32 uniformly distributed on the circumference, the cover body 1 is provided with through holes 11 correspondingly arranged with the press-riveting nuts 32, and the fixing rod 31 is fixed on the cover body 1 through screws 61 penetrating through the through holes 11. In the present embodiment, the clinch nuts 32 are provided at equal intervals around the cover body in a central symmetry manner.

Referring to fig. 10, the dust cover further comprises a strong magnet 4 with a stud 41 matched with the rivet pressing nut 32, a fixing nut 12 is also arranged on one side surface of the cover body 1 close to the compression bar assembly 3, and the magnet 4 is fixed through the rivet pressing nut 32 and the fixing nut 12. Furthermore, a rubber gasket 42 is arranged on a stud 41 of the strong magnet 4 to prevent the screw thread of the stud from loosening, and the position of the strong magnet 4 corresponds to the position of four steel fixing screws of a fan on the power module. The dust cover is connected with the heat dissipation device in a magnetic adsorption mode through the powerful magnet, and the dust cover can be conveniently detached and installed. Specifically, the position of the powerful magnet 4 corresponds to the positions of four steel fixing screws of the fan on the power module, that is, the powerful magnet 4 is adsorbed on the nut planes of the four steel fixing screws.

A guide bar 34 is rotatably connected to the central portion. Further, a knob 33 is provided at the center portion to be interlocked with the guide rod 34, and the knob 33 drives the guide rod 34 to rotate along the circumferential direction along the plane where the dust screen 2 is located with the center portion as a rotation axis. The guide rod 34 is also a cross structure and comprises guide arms radiating around the center, a slide rail matched with the guide arms is arranged on the driven rod, and the guide rod 34 pushes the driven rod to extend around the hinge 37 to the periphery of the cover body 1 and compress the dust screen through the slide rail.

The guide arm comprises a first guide arm and a second guide arm, wherein the first guide arm is overlapped with the fixing part in the second state, the second guide arm extends from the first guide arm in a bending mode, and the second guide arm pushes the driven rods (35 and 36) through the sliding rail. The driven lever includes first and second driven

levers

35 and 36 connected to both sides of the fixing lever 31, respectively, and the first and second driven

levers

35 and 36 are connected to the respective fixing portions by hinges 37, respectively. Furthermore, a second hinge 38 is provided between the first driven link 35 and the second driven link 36, and the first driven link 35 and the second driven link 36 can be moved relative to each other by the second hinge 38. In the present embodiment, the fixing rod 31 has a cross-shaped structure, and has four fixing portions and four corresponding hinges 37, and each hinge 37 is connected with one first driven rod 35 and one second driven rod 36. The driven lever is caused to expand and rotate or contract outwardly about the hinge 37 by pushing or pulling the guide lever 34.

In the actual use process, the knob 33 of the compression bar assembly 3 is rotated clockwise, the knob 33 drives the guide rod 34 to rotate clockwise, the guide rod 34 pushes the first driven rod 35 and the second driven rod 36 to rotate outwards around the hinge 37 and move outwards around the second hinge 38, the edge of the compression bar assembly 3 is expanded, the limit position covers the edge of the dustproof sponge, and the dustproof sponge is fixed.

Further, in this embodiment, the first guide arm is provided with a locking hole 341, the fixing rod is provided with a threaded hole 311 corresponding to the locking hole 341, and when the pressure bar assembly 3 is rotated to be in the second state to press the dust screen 2, the fixing of the pressure bar assembly can be realized by the locking screw 39 passing through the locking hole. In the state, the dust screen can be compressed to fully filter the airflow; and secondly, the sectional area of the driven rod for blocking the airflow can be reduced, the airflow can be passed as much as possible, and the influence on the heat dissipation effect is avoided.

When the dust cover needs to be maintained, after the dust cover is taken down from the power module, the locking screw 39 of the compression bar assembly is unscrewed, the knob 33 is rotated anticlockwise, the first driven bar 35 and the second driven bar 36 rotate inwards around the hinge joint 37 and move inwards around the second hinge joint 38, the edge formed by the sponge compression bar 3 is reduced to the limit position, the four fixing screws 61 of the compression bar assembly are unscrewed, the compression bar assembly 3 is taken down from the cover body 1, the dust screen 2 is taken out from the cover body 1 for replacement or cleaning, the cleaned or replaced dust screen 2 is placed into the cover body 1 after the completion, and the sponge compression bar 3 is installed and the position of the driven bar is adjusted, and then the dust screen is installed on the outer side of the power module fan.

The invention also provides a heat dissipation device which comprises the dust cover. The dustproof cover comprises a magnet with a stud, a metal or magnetic part attracted with the magnet is arranged on a frame of the cooling fan, and the dustproof cover is connected with the cooling fan through the attraction force of the magnet. The novel steel pipe clamp has the beneficial effects of convenience in disassembly and maintenance and high reliability.

Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.

Claims

1. The dust cover is characterized by comprising a cover body, a dust screen arranged in the cover body and a telescopic pressure bar assembly used for detachably installing the dust screen into the cover body, wherein the cover body comprises a body part and a bent part bent and extended from the body part to enclose an internal space, rectangular areas surrounded by the bent parts of four sides of the cover body cover the protective screen, the area of the rectangular areas is smaller than that of the dust screen, the pressure bar assembly is a connecting rod mechanism, and the pressure bar assembly is installed on the cover body from the rectangular areas surrounded by the bent parts of the cover body.

2. The dust boot of claim 1, wherein said strut assembly comprises a fixed rod connected to said boot, a guide rod pivotally connected to said fixed rod, and a driven rod hinged to said fixed rod and pivotable about said hinge upon actuation of said guide rod.

3. The dust cover of claim 1, wherein said cover body is provided with a plurality of concentric annular vents, and said dust screen covers said vents.

4. The dust boot of claim 2, wherein the fixing rod has a cross-shaped structure including a central portion at the center and cross-shaped fixing portions radially extending from the central portion to the periphery, the fixing rod being connected to the boot body through the fixing portions, the guide rod being rotatably connected to the central portion.

5. The dust cover according to claim 4, wherein the fixing portion is provided with a rivet nut at each end portion thereof remote from the central portion, the cover body is provided with a through hole corresponding to the rivet nut, and the fixing rod is fixed to the cover body by a screw passing through the through hole to press the dust cover.

6. The dust cover of claim 5, further comprising a magnet with a stud attached to the clinch nut, the magnet for attaching the dust cover to the heat sink fan.

7. The dust cover according to claim 4, wherein a knob is provided on the central portion and is interlocked with the guide rod, and the knob drives the guide rod to rotate in a circumferential direction around the central portion as a rotation axis.

8. The dust cover of claim 7, wherein the guide rod is of a cross-shaped structure and comprises guide arms radiating from the center to the periphery, the driven rod is provided with slide rails matched with the guide arms, and the guide rod pushes the driven rod to extend around the hinge to the periphery of the dust cover body through the slide rails and press the dust screen tightly.

9. The dust cap of claim 8, wherein the driven levers include a first driven lever and a second driven lever connected to both sides of the fixed lever, respectively, one ends of the first driven lever and the second driven lever are connected to adjacent ones of the fixing portions, respectively, the other ends of the first driven lever and the second driven lever are connected by hinges, respectively, and relative movement is achieved between the first driven lever and the second driven lever by hinges.

10. The dust cap of claim 9, wherein the strut assembly includes a first state in which the driven rod is retracted inwardly and a second state in which the driven rod is extended outwardly, and the guide arms include a first guide arm that coincides with the fixing portion in the second state and a second guide arm that extends from the first guide arm in a bent manner, and the second guide arm pushes the driven rod through the slide rail.

11. The dust cap of claim 10, wherein the first guide arm is provided with a locking hole, the fixing rod is provided with a threaded hole corresponding to the locking hole, and the locking of the strut assembly is achieved by a locking screw passing through the locking hole when the strut assembly is in the second state.

12. A dust cap according to claim 2, wherein the bent portion of the cap body is provided with a sealing strip which is tightly attached to the inner surface of the cap body.

13. A heat dissipating device comprising a heat dissipating fan and the dust cover according to any one of claims 1 to 12.

14. The heat dissipating device of claim 13, wherein the dust cover comprises a magnet, and the frame of the heat dissipating fan is provided with a metal or magnetic member that attracts the magnet.