CN110794639A - Dustproof assembly and projection equipment - Google Patents

Abstract

The embodiment of the invention provides a dustproof assembly and projection equipment. The dustproof assembly comprises a base, a dustproof net, a first support, a second support, first magnetism portion of inhaling and second magnetism portion of inhaling, dustproof net and first support are laminated and are set up in the surface of base, the base has relative first slide rail and the second slide rail that sets up and is located the limit structure of first slide rail and second slide rail one side, second support sliding connection is in first slide rail and second slide rail, the second support has relative first end and second end, first end has the mounting groove, first magnetism portion of inhaling is acceptd in the mounting groove, second magnetism portion of inhaling is fixed in first support, slide so that the second end supports when holding in limit structure along first slide rail and second slide rail when the second support, first magnetism portion of inhaling adsorbs in second magnetism portion, so that the second support covers in first support. The dustproof assembly provided by the embodiment of the application can take down the second support conveniently, and is convenient to maintain and replace.

Description

Dustproof assembly and projection equipment

Technical Field

The invention relates to the technical field of projection equipment, in particular to a dustproof assembly and projection equipment.

Background

In the equipment with a large number of electronic components, such as the case of a computer, the control cabinet of the equipment, and the projection equipment, generally, the case or the casing of the equipment must be provided with a ventilation opening for allowing air to form convection inside the equipment so as to dissipate heat of the electronic components arranged inside the equipment, and when the air flows through the inside of the equipment, dust, sweeps and the like in a large number of air are inevitably brought. After the dustproof net is used for a long time, a large amount of dust can be accumulated on the surface of the dustproof net, and the dustproof net can block the ventilation opening to a certain extent to reduce the air inlet amount in the case or the shell, so that the heat dissipation function is influenced, and the equipment is overheated. However, the existing devices with a large number of electronic components inside are usually not cleaned or replaced, so the existing dust screens of these devices are usually locked on the chassis or the housing of the devices by screws, and require special tools (such as screwdrivers, hexagon socket wrenches, etc.) for disassembly, which is very inconvenient.

Disclosure of Invention

The embodiment of the invention provides a dustproof assembly and projection equipment, which can be used for conveniently taking down a second support in the dustproof assembly from a base, and are convenient to maintain and replace.

The embodiment of the invention provides a dustproof assembly, which comprises a base, a dustproof net, a first support, a second support, a first magnetic suction part and a second magnetic suction part, wherein the dustproof net and the first support are arranged on the surface of the base in a stacking manner, the base is provided with a first slide rail and a second slide rail which are arranged oppositely, and a limiting structure positioned on one side of the first slide rail and the second slide rail, the second support is connected with the first slide rail and the second slide rail in a sliding manner, the limiting structure is used for limiting the sliding stroke of the second support, the second support is provided with a first end and a second end which are opposite, the first end is provided with an installation groove, the first magnetic suction part is accommodated in the installation groove, the second magnetic suction part is fixed on the first support, when the second support slides along the first slide rail and the second slide rail to enable the second end to abut against the limiting structure, the first magnetic part is attracted to the second magnetic part, so that the second support is mounted on the first support.

According to the dustproof assembly provided by the embodiment of the invention, the first magnetic suction part is arranged at the first end of the second support, the second magnetic suction part is arranged on the first support, when the second support slides to the position limiting structure along the first sliding rail and the second sliding rail of the base, the second end of the second support is abutted against the position limiting structure, and the first magnetic suction part can be adsorbed on the second magnetic suction part, so that the second support can be conveniently arranged on the base. When the second support moves along the direction of keeping away from the base along first slide rail and second slide rail orientation, disconnection between the portion is inhaled to first magnetism and the second magnetism is inhaled and is adsorbed to can be convenient take off the second support from the base, be convenient for maintain and change. For the mode that adopts buckle structure, the process of this application installation and taking off the second support is all comparatively swift, labour saving and time saving.

An embodiment of the present invention further provides a projection apparatus, where the projection apparatus includes a projection curtain and the dustproof assembly provided in any of the above embodiments, the projection curtain is capable of extending out or retracting into the base, and the dustproof assembly is configured to prevent dust on the projection curtain from falling into the base.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a dust-proof assembly according to an embodiment of the present invention.

Fig. 2 is a schematic view of the dust screen of the dust assembly provided in fig. 1 in an assembled state.

Fig. 3 is a schematic structural view of the dust screen of the dust-proof assembly provided in fig. 1 in a disassembled state.

Fig. 4 is a schematic structural view of an exploded view of the dust screen of the dust assembly provided in fig. 1.

Fig. 5 is a schematic structural view of the dust-proof assembly provided in fig. 1 and having a magnetic attraction portion.

Fig. 6 is a schematic view of another dust screen assembly with the dust screen in an assembled state.

Fig. 7 is a schematic structural view of the dust screen in fig. 6.

Fig. 8 is another structural diagram of the dust-proof assembly with a magnetic part.

FIG. 9 is a schematic view of another structure of a magnetic attraction portion of the dust-proof assembly.

FIG. 10 is a schematic view of another structure of a magnetic attraction portion of a dust-proof assembly.

FIG. 11 is a schematic view of another structure of a magnetic attraction portion of a dust-proof assembly.

Fig. 12 is a schematic view of a second bracket of the dust seal assembly.

Fig. 13 is another structural schematic of the second bracket in the dust seal assembly.

Fig. 14 is a structural view of a partially enlarged view of the second bracket in fig. 13 in a region M.

Fig. 15 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.

Fig. 16 is a schematic view of a portion of the projection device of fig. 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

The description of illustrative embodiments in accordance with the principles of the invention is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. In describing the embodiments of the invention disclosed, reference to any direction or orientation is intended merely to facilitate explanation and is not intended to limit the scope of the invention in any way. Relative terms such as "front," "back," "upper," "lower," "side," "outer," "inner," "middle," "inner," "outer," "lower," "upper," "horizontal," "vertical," "above," "below," "up," "down," "top" and "bottom") and derivatives thereof (e.g., "horizontally," "downwardly," "upwardly," etc.) should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description only and do not require that the apparatus be constructed or operated in a particular orientation unless otherwise specifically stated. Thus, the invention should not be limited to the exemplary embodiments which illustrate some possible non-limiting combinations of features which may be present alone or in other feature combinations; the scope of protection of the invention is defined by the appended claims.

As presently contemplated, this disclosure describes the best mode or mode of practice of the invention. The present invention is not intended to be understood from the limiting layer, but rather is to be provided as an illustrative example only, in connection with the accompanying drawings, so as to inform those skilled in the art of the advantages and construction of the invention. Like reference characters designate like or similar parts throughout the various views of the drawings.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, a dust-proof assembly 10 provided in an embodiment of the present application includes a base 100, a dust-proof net 200, a first bracket 300, a second bracket 400, a first magnetic attraction part 500 and a second magnetic attraction part 600, wherein the dust-proof net 200 and the first bracket 300 are stacked on a surface of the base 100, the base 100 has a first slide rail 110 and a second slide rail 120 which are oppositely disposed, and a limiting structure 130 located at one side of the first slide rail 110 and the second slide rail 120, the second bracket 400 is slidably connected to the first slide rail 110 and the second slide rail 120, the limiting structure 130 is used for limiting a sliding stroke of the second bracket 400, the second bracket 400 has a first end 410 and a second end 420 which are opposite, the first end 410 has a mounting groove 410a, the first magnetic attraction part 500 is accommodated in the mounting groove 410a, the second magnetic attraction part 600 is fixed to the first bracket 300, and when the second bracket 400 slides along the first slide rail 110 and the second slide rail 120 to enable the second end 420 to abut against the limiting structure 130, the first magnetic attraction part 500 is attracted to the second magnetic attraction part 600, so that the second bracket 400 is mounted on the first bracket 300.

The dustproof assembly 10 may be used in a device with a large number of electronic components, such as a computer case, a control cabinet of the device, and the projection device 1, and is used for ventilating the inside of the device to dissipate heat of the electronic components inside the device and prevent dust from entering the device to a certain extent. The first bracket 300 may be a stainless steel bracket, and the second bracket 400 may be a plastic bracket.

The base 100 may be a plastic base, and the base 100 constitutes a supporting frame of the dust-proof component 10. The dust screen 200 is attached to the surface of the base 100, the dust screen 200 is provided with the air holes with small radial sizes, and dust in the external environment can be prevented from falling into the base 100, so that the electronic device in the base 100 is protected from dust. The dust screen 200 can be fixed on the base 100 in a colloid bonding mode, the first support 300 covers the dust screen 200 to fix and flatten the dust screen 200, and the first support 300 is fixed on the base 100. Specifically, the connection mode between the first bracket 300 and the base 100 may be a snap structure, a pin structure, or a connection mode such as a screw or a rivet.

The base 100 is provided with a first slide rail 110 and a second slide rail 120 which are arranged at intervals and a limiting structure 130 which is positioned between the first slide rail 110 and the second slide rail 120, the dust screen 200 and the first support 300 avoid the first slide rail 110, the second slide rail 120 and the limiting structure 130, the second support 400 can slide between the first slide rail 110 and the second slide rail 120 in a reciprocating manner, and the second support 400 can be supported by the limiting structure 130 to limit the position of the second support. The second bracket 400 has a first end 410 and a second end 420 which are opposite to each other, the first end 410 has a mounting groove 410a, a first magnetic attraction part 500 is arranged in the mounting groove 410a, a second magnetic attraction part 600 is arranged on the first bracket 300, when the second bracket 400 moves towards a direction close to the base 100 so that the second end 420 abuts against the limiting structure 130, the first magnetic attraction part 500 is attracted to the second magnetic attraction part 600, so that the second bracket 400 covers the first bracket 300, and at this time, the second bracket 400 is mounted on the base 100. When the second bracket 400 moves in a direction away from the base 100 so that the second end 420 is away from the limiting structure 130, the second magnetic portion 600 and the first magnetic portion 500 are separated from each other, and at this time, the second bracket 400 is unloaded from the base 100. Through the mutual absorption of magnetic part, can install second support 400 in base 100, adsorb through the disconnection of magnetic part, can take off from base 100 between the plastic, it is swift convenient, labour saving and time saving.

The first magnetic part 500 and the second magnetic part 600 may be magnets.

Further, the first slide rail 110 and the second slide rail 120 are arranged at an interval, the limiting structure 130 is arranged on one side of the first slide rail 110 and one side of the second slide rail 120, the limiting structure 130 is disconnected from the first slide rail 110, and the limiting structure 130 is disconnected from the second slide rail 120, so that mutual interference caused by stress among the first slide rail 110, the second slide rail 120 and the limiting structure 130 can be avoided, and the stress among the first slide rail 110, the second slide rail 120 and the limiting structure 130 can be released easily.

In an embodiment, the first slide rail 110 and the second slide rail 120 are arranged in parallel, and when the second bracket 400 slides between the first slide rail 110 and the second slide rail 120, the side wall of the second bracket 400 always fits the first slide rail 110 and the second slide rail 120 to slide, which helps to ensure that the sliding process of the second bracket 400 is relatively stable.

In another embodiment, the first slide rail 110 and the second slide rail 120 are not parallel, and the distance between the first slide rail 110 and the second slide rail 120 gradually increases from the side close to the limiting structure 130 to the side far from the limiting structure 130, and at this time, the second bracket 400 is accommodated by a tapered region, so that the sliding stroke of the second bracket 400 can be extended, and the smoothness of the sliding between the plastics can be increased.

In one embodiment, the dust screen 200 and the first bracket 300 are sequentially stacked on the surface of the base 100, and the first bracket 300 can flatten and limit the dust screen 200. The present invention is illustrated by the present example.

In another embodiment, the first bracket 300 and the dust screen 200 are sequentially stacked on the surface of the base 100, the first bracket 300 is fixed to the base 100, and the dust screen 200 is attached to the surface of the first bracket 300, so that the dust screen 200 is conveniently connected to the first bracket 300 by means of adhesive bonding.

In the dust-proof assembly 10 provided by the embodiment of the invention, the first magnetic attraction part 500 is disposed at the first end 410 of the second bracket 400, the second magnetic attraction part 600 is disposed on the first bracket 300, when the second bracket 400 slides to the position of the limiting structure 130 along the first slide rail 110 and the second slide rail 120 of the base 100, so that the second end 420 of the second bracket 400 abuts against the limiting structure 130, and the first magnetic attraction part 500 can be attracted to the second magnetic attraction part 600, so that the second bracket 400 can be conveniently mounted on the base 100. When the second bracket 400 moves along the first slide rail 110 and the second slide rail 120 toward the direction far away from the base 100, the first magnetic attraction part 500 and the second magnetic attraction part 600 are separated from each other for adsorption, so that the second bracket 400 can be conveniently taken down from the base 100 for maintenance and replacement. For the mode that adopts buckle structure, the process of this application installation and taking off second support 400 is all comparatively swift, labour saving and time saving.

Referring to fig. 6 and 7, the base 100 has a first heat dissipation hole 100a, the first bracket 300 has a second heat dissipation hole 300a, the first heat dissipation hole 100a at least partially faces the second heat dissipation hole 300a, and the dust-proof net 200 at least partially shields the first heat dissipation hole 100a and the second heat dissipation hole 300 a.

The number of the first heat dissipation holes 100a may be plural or one. The number of the second heat dissipation holes 300a may be plural or one. The first heat dissipation hole 100a is at least partially aligned with the second heat dissipation hole 300a, so that heat inside the base 100 can be conveniently conducted out through the first heat dissipation hole 100a and the second heat dissipation hole 300a, and a heat dissipation protection effect is achieved on electronic devices inside the base 100. In one embodiment, the first heat dissipation hole 100a completely faces the second heat dissipation hole 300a, so that heat can be better conducted out of the first heat dissipation hole 100a and the second heat dissipation hole 300a, and the heat dissipation speed is increased.

Further, the dust screen 200 at least partially shields the first heat dissipation hole 100a and the second heat dissipation hole 300a, thereby preventing external dust from entering the base 100 through the first heat dissipation hole 100a and the second heat dissipation hole 300a, and preventing the dust from damaging electronic devices in the base 100.

Furthermore, the cooling member 210 is disposed in a region of the dust screen 200 corresponding to the first heat dissipation hole 100a and the second heat dissipation hole 300a, the cooling member 210 has a pile structure 211, the pile structure 211 of the cooling member 210 is disposed to face the base 100, the cooling member 210 has air permeability, and when heat inside the base 100 is discharged through the first heat dissipation hole 100a and the second heat dissipation hole 300a, the heat is diffused through the pile structure 211 of the cooling member 210, so that the heat from inside the base 100 can be rapidly cooled.

In one embodiment, the second bracket 400 has a third heat dissipation hole 400a, when the second end 420 abuts against the position-limiting structure 130, the third heat dissipation hole 400a at least partially faces the second heat dissipation hole 300a, and the third heat dissipation hole 400a at least partially faces the first heat dissipation hole 100 a.

Specifically, the second bracket 400 also has a third heat dissipation hole 400a, and in an embodiment, when the second end 420 of the second bracket 400 abuts against the limiting structure 130, the first heat dissipation hole 100a, the second heat dissipation hole 300a and the third heat dissipation hole 400a are all arranged right opposite to each other, so that the heat inside the base 100 is not blocked, the heat inside the base 100 can be quickly guided out from the base 100, and the electronic device inside the base 100 is protected.

Referring to fig. 8, the first magnetic part 500 includes a first magnetic member 510, a second magnetic member 520, and a third magnetic member 530 disposed at intervals in sequence, and the arrangement direction of the first magnetic member 510, the second magnetic member 520, and the third magnetic member 530 is orthogonal to the sliding direction of the second bracket 400.

Specifically, the first magnetic attraction piece 510, the second magnetic attraction piece 520 and the third magnetic attraction piece 530 are sequentially arranged at intervals along the width direction of the second support 400, and when the second support 400 moves towards the direction close to the base 100 so that the second end 420 abuts against the limiting structure 130, the first magnetic attraction piece 510, the second magnetic attraction piece 520 and the third magnetic attraction piece 530 can be simultaneously adsorbed on the second magnetic attraction portion 600 on the first support 300, so that the second support 400 is installed on the first support 300. When the second bracket 400 moves towards the direction far away from the base 100 so that the second end 420 is far away from the limiting structure 130, the first magnetic attraction piece 510, the second magnetic attraction piece 520 and the third magnetic attraction piece 530 can be simultaneously disconnected from the attraction with the second magnetic attraction portion 600 on the first bracket 300, so that the second bracket 400 is unloaded from the first bracket 300, and the device is convenient, fast, time-saving and labor-saving.

Further, when the second bracket 400 is covered on the first bracket 300, the first magnetic attraction part 500 and the second magnetic attraction part 600 are completely hidden at the bottom of the second bracket 400, which is helpful for improving the appearance consistency of the dustproof assembly 10, and prevents the dust from causing bad interference to the first magnetic attraction part 500 and the second magnetic attraction part 600.

In one embodiment, the distance between the first magnetic attraction piece 510 and the second magnetic attraction piece 520 is equal to the distance between the second magnetic attraction piece 520 and the third magnetic attraction piece 530, the volume of the first magnetic attraction piece 510 is greater than the volume of the second magnetic attraction piece 520, and the volume of the third magnetic attraction piece 530 is greater than the volume of the second magnetic attraction piece 520.

Specifically, the second magnetic attraction piece 520 is located between the first magnetic attraction piece 510 and the third magnetic attraction piece 530, so that the volume of the first magnetic attraction piece 510 is larger than that of the second magnetic attraction piece 520, and the volume of the third magnetic attraction piece 530 is larger than that of the second magnetic attraction piece 520, so that the connection between the two sides of the second support 400 and the first support 300 is firmer. And make first magnetism inhale the distance between piece 510 and the second magnetism inhale piece 520 and equal to the second magnetism inhale the distance between piece 520 and the third magnetism inhale piece 530, can make first magnetism inhale portion 500 and the second magnetism inhale portion 600 the adsorption-force when adsorbing more be, and then make the connection between second support 400 and the first support 300 more steady.

Referring to fig. 9, the second magnetic portion 600 includes a fourth magnetic element 610, a fifth magnetic element 620 and a sixth magnetic element 630, which are sequentially disposed at intervals, wherein when the second bracket 400 slides along the first slide rail 110 and the second slide rail 120 toward the base 100 so that the second bracket 400 abuts against the limiting structure 130, at least a portion of the fourth magnetic element 610 faces the first magnetic element 510, at least a portion of the fifth magnetic element 620 faces the second magnetic element 520, and at least a portion of the sixth magnetic element 630 faces the third magnetic element 530.

In one embodiment, the volume of the first magnetic member 510 is consistent with the volume of the fourth magnetic member 610, the volume of the second magnetic member 520 is consistent with the volume of the fifth magnetic member 620, the volume of the third magnetic member 530 is consistent with the volume of the sixth magnetic member 630, when the second bracket 400 moves toward a direction close to the base 100 to enable the second end 420 to abut against the position-limiting structure 130, the first magnetic member 510 faces the fourth magnetic member 610 and is just absorbed on the surface of the fourth magnetic member 610, the second magnetic member 520 faces the fifth magnetic member 620 and is just absorbed on the surface of the fifth magnetic member 620, the third magnetic member 530 faces the sixth magnetic member 630 and is just absorbed on the surface of the sixth magnetic member 630, so that the second bracket 400 is magnetically connected to the first bracket 300, and under the action of external force, the first magnetic member 500 and the second magnetic member 600 are easily separated, thereby accomplishing the purpose of detaching the second bracket 400 from the first bracket 300.

With reference to fig. 10, it can be understood that, in other embodiments, the first magnetic attraction piece 510, the second magnetic attraction piece 520, and the third magnetic attraction piece 530 are sequentially disposed at intervals, the fourth magnetic attraction piece 610, the fifth magnetic attraction piece 620, and the sixth magnetic attraction piece 630 are sequentially disposed at intervals, when the second bracket 400 moves toward a direction close to the base 100 to enable the second end 420 to abut against the limiting structure 130, the fourth magnetic attraction piece 610 is located between the first magnetic attraction piece 510 and the second magnetic attraction piece 520, the fifth magnetic attraction piece 620 is located between the second magnetic attraction piece 520 and the third magnetic attraction piece 530, and the sixth magnetic attraction piece 630 is located at a side of the third magnetic attraction piece 530 away from the fifth magnetic attraction piece 620, at this time, the first magnetic attraction piece 510, the fourth magnetic attraction piece 610, the second magnetic attraction piece 520, the fifth magnetic attraction piece 620, the third magnetic attraction piece 530, and the sixth magnetic attraction piece 630 sequentially absorb through the side surfaces, so as to avoid the first magnetic attraction piece 500 and the second magnetic attraction piece 600 being overlapped, so that the thickness of the dust-proof assembly 10 can be reduced.

Referring to fig. 11, the dust-proof assembly 10 further includes a third magnetic portion 700 and a fourth magnetic portion 750, the third magnetic attraction part 700 includes a plurality of sub-attraction members 710, the plurality of sub-attraction members 710 are arranged at intervals along the extending direction of the first slide rail 110 and the second slide rail 120, and the sub-absorption pieces 710 on the first sliding rail 110 and the sub-absorption pieces 710 on the second sliding rail 120 appear in pairs, the fourth magnetic attraction part 750 includes a plurality of sub-magnetic members 760, the plurality of sub-magnetic members 760 are spaced apart from each other on a side wall of the second bracket 400, when the second bracket 400 moves along the first slide rail 110 and the second slide rail 120 toward a direction approaching or departing from the base 100, the sub-absorption member 710 and the sub-magnetic member 760 absorb each other, so as to divide the suction between the second bracket 400 and the first bracket 300 into different stages.

Specifically, the sub-absorbing members 710 form a third magnetic absorption portion 700, the sub-magnetic members 760 form a fourth magnetic absorption portion 750, a part of the sub-absorbing members 710 are located on the first slide rail 110, a part of the sub-absorbing members 710 are located on the second slide rail 120, and the sub-absorbing members 710 located on the first slide rail 110 and the sub-absorbing members 710 located on the second slide rail 120 appear in pairs. The plurality of sub-magnetic members 760 form a fourth magnetic attraction portion 750, a part of the sub-magnetic members 760 are arranged on one side wall of the second bracket 400 at intervals, a part of the sub-magnetic members 760 are arranged on the other side wall of the second bracket 400 at intervals, and when the second bracket 400 moves a first distance from an initial position along the first sliding rail 110 and the second sliding rail 120 towards a direction close to the base 100, the part of the sub-magnetic members 710 attract the part of the sub-magnetic members 760, and this state is denoted as a first gear adjustment. When the second bracket 400 moves from the initial position to the direction approaching the base 100 along the first sliding rail 110 and the second sliding rail 120 by the second distance, the sub-attraction member 710 attracts the sub-magnetic member 760, and this state is referred to as a second gear adjustment. When the second bracket 400 moves a third distance from the initial position along the first sliding rail 110 and the second sliding rail 120 toward the direction close to the base 100, the sub-magnetic member 760 is attracted by the sub-attracting member 710, which is referred to as a third gear adjustment. Wherein the first distance is less than the second distance, and the second distance is less than the third distance. It will be appreciated that more gears may be divided according to the sliding stroke of the second bracket 400. According to different gear adjustments, can stop second support 400 in the predetermined position of base 100, promoted the gliding rhythm of second support 400 and felt.

Referring to fig. 12, the dust-proof assembly 10 further includes a force-applying portion 800, the force-applying portion 800 extends from the sidewall of the second bracket 400, and the force-applying portion 800 is disposed to avoid the first magnetic-attracting portion 500.

In one embodiment, the force application part 800 and the second bracket 400 are integrally formed, that is, the force application part 800 and the second bracket 400 are formed together in the same processing step, so that the strength of the second bracket 400 and the force application part 800 is increased, and a user can apply an external force to the force application part 800 to detach the second bracket 400 from the base 100. In addition, the appearance consistency of the dustproof assembly 10 can be improved.

In another embodiment, the force application portion 800 and the second bracket 400 are two independent components, the force application portion 800 is fixed on the sidewall of the second bracket 400 by means of screws, rivets, glue bonding, and the like, and the force application portion 800 and the second bracket 400 are detachably connected, at this time, when one component is damaged in the second bracket 400 or the force application portion 800, only the damaged component needs to be replaced, the whole component does not need to be replaced, and the maintenance cost can be saved.

In addition, different types of the second brackets 400 may be replaced for different bases 100. Or, different force application parts 800 are replaced for different second brackets 400, so as to be used for applying force to the second brackets 400, and diversification of the structure of the dustproof assembly 10 is increased.

Referring to fig. 13 and 14, the position-limiting structure 130 has a slot 131, and when the second bracket 400 slides along the first slide rail 110 and the second slide rail 120 toward the base 100 so that the second bracket 400 abuts against the position-limiting structure 130, the second bracket 400 is held in the slot 131.

Specifically, the limiting structure 130 is provided with a slot 131, when the second bracket 400 moves towards a side close to the base 100 so that the second end 420 of the second bracket 400 abuts against the slot 131 of the limiting structure 130, the second bracket 400 and the slot 131 are in clearance fit, and at this time, the slot 131 plays a role in limiting the second bracket 400.

With continuing reference to fig. 15 and fig. 16, an embodiment of the present application further provides a projection apparatus 1, where the projection apparatus 1 includes a projection curtain 20 and the dust-proof assembly 10 provided in any of the above embodiments, the projection curtain 20 can extend out of or retract into the base 100, and the dust-proof assembly 10 is used to prevent dust on the projection curtain 20 from falling into the base 100.

Specifically, projection apparatus 1 still includes pivot 30 and actuating mechanism 40, pivot 30 rotate connect in base 100, actuating mechanism 40 fixed connection in base 100, actuating mechanism 40's output power transmission extremely pivot 30 drives pivot 30 rotates. The projection curtain 20 is at least partially wound around the outer side of the rotating shaft 30, when the rotating shaft 30 is controlled by the driving mechanism 40 to rotate, the projection curtain 20 can extend out or retract into the base 100, and the dust screen 200 is used for preventing dust in the movement process of the projection curtain 20 from falling into the base 100, so that a protection effect on electronic devices in the base 100 is facilitated.

The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A dustproof assembly is characterized by comprising a base, a dustproof net, a first support, a second support, a first magnetic suction part and a second magnetic suction part, wherein the dustproof net and the first support are arranged on the surface of the base in a stacked mode, the base is provided with a first sliding rail and a second sliding rail which are arranged oppositely, and a limiting structure positioned on one side of the first sliding rail and the second sliding rail, the second support is connected to the first sliding rail and the second sliding rail in a sliding mode and used for limiting the sliding stroke of the second support, the second support is provided with a first end and a second end which are opposite, the first end is provided with a mounting groove, the first magnetic suction part is contained in the mounting groove, the second magnetic suction part is fixed on the first support, and when the second support slides along the first sliding rail and the second sliding rail to enable the second end to be supported on the limiting structure, the first magnetic part is attracted to the second magnetic part, so that the second support is mounted on the first support.

2. The dust-proof assembly of claim 1, wherein the base has a first heat dissipation hole, the first bracket has a second heat dissipation hole, the first heat dissipation hole at least partially faces the second heat dissipation hole, and the dust-proof mesh at least partially shields the first heat dissipation hole and the second heat dissipation hole.

3. The dust-proof assembly of claim 2, wherein the second bracket has a third heat dissipation hole, when the second end abuts against the limiting structure, the third heat dissipation hole at least partially faces the second heat dissipation hole, and the third heat dissipation hole at least partially faces the first heat dissipation hole.

4. The dustproof assembly of claim 1, wherein the first magnetic part comprises a first magnetic part, a second magnetic part and a third magnetic part, which are sequentially arranged at intervals, and the arrangement direction of the first magnetic part, the second magnetic part and the third magnetic part is orthogonal to the sliding direction of the second bracket.

5. The dust-proof assembly of claim 4, wherein the distance between the first magnetic attraction piece and the second magnetic attraction piece is equal to the distance between the second magnetic attraction piece and the third magnetic attraction piece, the volume of the first magnetic attraction piece is larger than the volume of the second magnetic attraction piece, and the volume of the third magnetic attraction piece is larger than the volume of the second magnetic attraction piece.

6. The dust-proof assembly of claim 4 or 5, wherein the second magnetic attraction portion includes a fourth magnetic attraction element, a fifth magnetic attraction element and a sixth magnetic attraction element, which are sequentially disposed at intervals, and when the second bracket slides along the first slide rail and the second slide rail toward the base to enable the second bracket to abut against the limiting structure, the fourth magnetic attraction element at least partially faces the first magnetic attraction element, the fifth magnetic attraction element at least partially faces the second magnetic attraction element, and the sixth magnetic attraction element at least partially faces the third magnetic attraction element.

7. The dust-proof assembly of claim 1, further comprising a third magnetic attraction portion and a fourth magnetic attraction portion, the third magnetic absorption part comprises a plurality of sub absorption pieces which are arranged at intervals along the extending direction of the first slide rail and the second slide rail, and the sub-absorbing part on the first slide rail and the sub-absorbing part on the second slide rail appear in pairs, the fourth magnetic part comprises a plurality of sub-magnetic parts which are arranged on the side wall of the second bracket at intervals, when the second bracket moves towards the direction close to or far away from the base along the first sliding rail and the second sliding rail, the sub-adsorption piece and the sub-magnetic piece are mutually adsorbed to divide the adsorption between the second support and the first support into different gears.

8. The dust-proof assembly of any one of claims 1-7, further comprising a force-applying portion extending from a sidewall of the second bracket, the force-applying portion being positioned to avoid the first magnetic attachment portion.

9. The dust-proof assembly of claim 1, wherein the limiting structure has a slot, and when the second bracket slides along the first slide rail and the second slide rail toward the base so that the second bracket abuts against the limiting structure, the second bracket is retained in the slot.

10. A projection device comprising a projection screen and the dust prevention assembly of any of claims 1-9, wherein the projection screen is extendable or retractable into the base, and wherein the dust prevention assembly is configured to prevent dust on the projection screen from falling into the base.

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