WO2018040635A1 - 防尘过滤结构及具有其的投影装置 - Google Patents

防尘过滤结构及具有其的投影装置 Download PDF

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Publication number
WO2018040635A1
WO2018040635A1 PCT/CN2017/086176 CN2017086176W WO2018040635A1 WO 2018040635 A1 WO2018040635 A1 WO 2018040635A1 CN 2017086176 W CN2017086176 W CN 2017086176W WO 2018040635 A1 WO2018040635 A1 WO 2018040635A1
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WIPO (PCT)
Prior art keywords
bracket
filter assembly
filter structure
disposed
dust filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/086176
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English (en)
French (fr)
Inventor
杜伦春
黄旻
农静杰
谢涛
李屹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Filing date
Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2018040635A1 publication Critical patent/WO2018040635A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Definitions

  • the utility model relates to the field of air heat dissipation filtering, in particular to a dust filter structure and a projection device using the dust filter structure.
  • a projection device is a high-power device that converts electrical energy into light energy, and its constituent structure includes a plurality of heat sources that generate a large amount of heat during operation, such as a light source, a color wheel, a light modulator, and the like.
  • the heat source is generally dissipated by forced convection.
  • a conventional projection device has a dustproof filter structure disposed on a casing thereof.
  • the dust filter structure includes a filter assembly and upper and lower housings assembled integrally, wherein the filter assembly is received in the upper and lower housings, and the lower housing is coupled to the outer casing of the projection device.
  • Through holes communicating with each other are provided in the upper and lower casings and the filter assembly.
  • the through hole formed in the lower case generally covers the entire surface area of the lower case. Therefore, the air flowing into the projection device from the outside, in addition to flowing into the region corresponding to the heat source in the projection device, also flows into the region of the projection device away from the heat source, thereby reducing the utilization of wind energy and reducing the heat dissipation efficiency. .
  • a dust filter structure includes a bracket and a filter assembly, the bracket being located on one side of the filter assembly.
  • the bracket includes a solid portion and a hollow portion through which air passing through the filter assembly is blocked and can pass through the hollow portion.
  • the solid portion and the hollow portion are symmetrically disposed with respect to a central major axis or a central minor axis of the stent.
  • the bracket is provided with a plurality of mesh openings, and the plurality of mesh openings are selectively configured as a plurality of through holes and a plurality of blind holes, wherein the through holes are provided
  • the area is the hollow portion, and the area in which the blind hole is provided is the solid portion.
  • At least a portion of the side walls of the through holes are beveled.
  • the dust filter structure further includes a fixing frame, the fixing frame is provided with a plurality of gratings, and the filter assembly is sandwiched between the fixing frame and the bracket; the bracket A lock is disposed on the fixed frame, and a hook is disposed on the fixed frame, and the hook passes through the filter assembly and is engaged in the buckle.
  • the filter assembly is provided with a avoidance slot for the hook to pass through.
  • the side wall of the fixing frame is provided with a folded edge, and the folded edge is formed to extend toward the bracket and is located on the same side of the filter assembly and the bracket, and the folded edge is used for Connect external components.
  • a projection apparatus comprising a housing and any of the above-described dust filter structures, the bracket being fixedly coupled to the housing.
  • At least one side wall of the bracket is provided with a latching protrusion
  • a sidewall of the outer casing is provided with a latching groove that cooperates with the latching protrusion, and the latching convexity
  • the card is connected to the card slot.
  • the outer casing includes opposite upper and lower casings, and three side walls connecting the upper casing and the lower casing, the upper casing, the lower casing and two The opposite ends of the oppositely disposed side walls together define a mounting opening, the bracket and the filter assembly are sequentially disposed at the mounting opening, and the filter assembly covers the mounting opening.
  • the dustproof filter structure of the present invention has a hollow portion and a solid portion on the bracket, and adjusts the distribution of the hollow portion and the solid portion, so that the area where the hollow portion is located is substantially opposite to the heat generating portion of the projection device, and the solid portion is The area in which it is located is substantially opposite to the non-heating area of the projection device, so that the outside air is concentrated into the air from the hollow portion corresponding to the heat generating area of the projection device, thereby improving heat dissipation efficiency and utilization of air volume.
  • FIG. 1 is a partially exploded view of a projection apparatus according to an embodiment of the present invention.
  • FIG. 2 is a view showing the optical path structure of the projection apparatus shown in FIG. 1.
  • FIG 3 is a perspective view of a dust filter structure according to an embodiment of the present invention.
  • Figure 4 is an exploded view of the dust filter structure of Figure 3.
  • Figure 5 is a cross-sectional view of a stent in accordance with an embodiment of the present invention.
  • Projection device 100 Ontology 20 shell twenty two Upper housing 221 Lower housing 223 Side wall 225 Mounting port 226 light source twenty four Color wheel 25 Optical relay system 26 Light modulator 27 Projection lens unit 28 Dust filter structure 40 support 42 surface 421 Through hole 422 side 423 Solid part 424 Clamping bulge 425 Hollow part 426 Lock 427 Blind hole 428 Filter component 44 Avoidance slot 442 Fixing frame 46 Folding 462 The hook 464 Grille 466
  • a component when a component is considered to be “connected” to another component, it can be directly connected to another component or a central component can be present at the same time. When a component is considered to be “set to” another component, it can be placed directly on another component or possibly with a centered component.
  • the terms “inwardly”, “from right to left”, “long axis”, “short axis”, “below”, and the like, as used herein, are for illustrative purposes only.
  • the term “and/or” used herein includes any and all combinations of one or more of the associated listed items.
  • FIG. 1 is a partially exploded view of a projection apparatus according to an embodiment of the present invention.
  • the projection device 100 includes a body 20 and a dustproof filter structure 40 disposed on the body 20.
  • FIG. 2 is a structural diagram of the optical path of the body of the projection device.
  • the body 20 includes a housing 22, a light source 24 disposed in the housing 22, a color wheel 25, an optical relay system 26 and a light modulator 27, and is disposed on the housing 22 and partially exposed to the housing 22.
  • External projection lens unit 28 External projection lens unit 28.
  • the outer casing 22 includes an upper casing 221 and a lower casing 223 disposed opposite to each other, and three side walls 225 connecting the upper casing 221 and the lower casing 223.
  • the upper housing 221, the lower housing 223 and the three side walls 225 together form a receiving cavity (not shown) for receiving the light source 24, the color wheel 25, and the light.
  • the light modulator 27 and a portion of the projection lens unit 28 are not connected to the other side walls 225
  • One end of the circumference is formed to form a mounting opening 226.
  • the mounting port 226 is configured to install the dust filter structure 40 and communicate with the receiving cavity to allow outside air to flow into the receiving cavity from the dust filter structure 40 to the projection device.
  • the heating element of 100 heats up.
  • a plurality of engaging grooves are disposed at an end of the at least one side wall 225 adjacent to the mounting opening 226.
  • a connecting groove (not shown) is defined in an end of the lower casing 223 adjacent to the mounting opening 226.
  • the light source 24 is for emitting excitation light, such as blue excitation light, and the light source 24 may be a blue laser light source (or blue laser). In a modified embodiment, the light source 24 may also be a light source of other colors, and is not limited to the blue light source.
  • the light source 24 may be an ultraviolet laser source (or an ultraviolet laser) to emit ultraviolet excitation. Light.
  • the light source 24 is preferably a semiconductor laser source for providing high brightness excitation light.
  • the color wheel 25 is disposed on the optical path of the excitation light emitted by the light source 24 for receiving the emitted excitation light of the light source 24 and emitting the light of the at least two colors.
  • the color wheel 25 may be a disk-shaped color wheel for sequentially emitting light of the at least two colors (such as red, green, blue, three-color light, yellow-blue light, etc.).
  • the color wheel 25 may be provided with a fluorescent material, and the fluorescent material may be excited by the excitation light to generate a laser of another color or two colors (such as a laser of a color such as red, green and yellow). Thereby the color wheel can emit light of at least two colors.
  • the color wheel 25 is a transmissive color wheel, that is, the light of the light source 24 is incident from one side of the color wheel 25, and the other side of the color wheel 25 emits the at least two types.
  • the light of the color can also be a reflective color wheel 25.
  • the optical relay system 26 is disposed on one side of the light source 24 for multiplexing, collecting, and shaping the light emitted by the color wheel 25 (for example, such that the projection spot of the light beam conforms to a predetermined shape). Provided to the light modulator 27.
  • the light modulator 27 is disposed between the optical relay system 26 and the projection lens unit 28 for illuminating a light beam incident on the light modulator 27 via the optical relay system 26 according to input image data. Image modulation is performed to produce modulated image light, and the modulated image light is transmitted to the projection lens unit 28.
  • the light modulator 27 may include a reflective light modulator or a transmissive light modulator. Wherein, the light beam from the light source 24 is incident on the front surface of the reflective light modulator and is reflected from the reflective light modulator to the projection lens unit 28; or the light beam from the light source 24 is incident on the projected light The front surface of the modulator is transmitted to the projection lens unit 28 through the projection type light modulator.
  • the reflective light modulator comprises a reflective light valve (Digital Micromirror Device, DMD), the reflective light valve comprising a plurality of tiny mirrors of the same number of pixels, electronically or mechanically changing the angle of each mirror into the reflection The beam on the front surface of the light valve is modulated and reflected.
  • DMD Digital Micromirror Device
  • the projection lens unit 28 is configured to amplify the incident modulated image light and project the modulated image light onto a screen (not shown) to display a predetermined image.
  • FIG. 3 is a perspective view of a dust filter structure according to an embodiment
  • FIG. 4 is an exploded view of the dust filter structure shown in FIG.
  • the dust filter structure 40 includes a bracket 42 , a filter assembly 44 , and a mounting bracket 46 .
  • the bracket 42 , the filter assembly 44 and the fixing bracket 46 are sequentially disposed on the outer casing 22 from right to left, wherein the filter assembly 44 is sandwiched between the bracket 42 and the filter assembly 44 between.
  • the bracket 42 is mounted at the same end of the opposite sidewalls 225. Specifically, in the illustrated embodiment, the bracket 42 is disposed on the inner wall of the two opposite sidewalls 225 and spaced apart from the mounting port 226 by a predetermined distance to facilitate the filter assembly. Both 44 and the mounting bracket 46 can be received in the outer casing 22 and enable the mounting bracket 46 to cover the mounting opening 226. It can be understood that, in other embodiments, the bracket 42 can be installed at the same end of the two opposite sidewalls 225 and cover the mounting opening 226. At this time, the filter assembly 44 and the mounting bracket 46 is externally attached to the outer casing 22.
  • the bracket 42 is substantially rectangular plate-shaped, and includes two surfaces 421 disposed opposite to each other and four side surfaces 423 connecting the two surfaces 421. The four side faces 423 are connected end to end in sequence.
  • the bracket 42 also includes a spaced apart solid portion 424 and a hollow portion 426. In other words, the bracket 42 is divided into a plurality of portions, one of which is a solid portion 424, and the other portion is a hollow portion 426, which can be spliced to form the bracket 42.
  • the solid portion 424 of the bracket 42 is a porous structure.
  • a plurality of blind holes 428 are disposed on the solid portion 424.
  • the blind hole 428 may only pass through one surface 421 of the bracket 42 , or both ends of the blind hole 428 respectively penetrate the two surfaces 421 of the bracket 42 , and the middle of the blind hole 428 is blocked, so that Both ends of the blind hole 428 are not connectable.
  • the solid portion 424 is used to block the flow of air, in other words, air passing through the filter assembly 44 cannot pass through the bracket 42 via the solid portion 424.
  • the solid portion 424 can also be a plate-like structure, for example, the solid portion 424 is a solid plate.
  • the hollow portion 426 of the stent 42 is of a porous structure.
  • the hollow portion 426 is provided with a plurality of through holes 422.
  • the through holes 422 penetrate through the two surfaces 421 of the bracket 42.
  • the through hole 422 is for air circulation, in other words, air passing through the filter assembly 44 can pass through the bracket 42 through the through hole 422 of the hollow portion 424.
  • the hollow portion 426 may be only an open-cell structure, and the number of the through holes 422 disposed thereon may be one or plural.
  • the sidewall of the through hole 422 is a sloped surface to better guide the wind flow through the through hole 422. It can be understood that among the plurality of through holes 422, only the side wall of the partial through hole 422 may be a slope.
  • Two latches 427 are also disposed on the surface 421 of the bracket 42.
  • the two latches 427 are disposed on the upper edge of the surface 421. It can be understood that the number of the buckles 427 can be one or more than two.
  • the buckle 427 is used to assemble the fixing bracket 46.
  • the solid portion 424 and the hollow portion 426 are symmetrically disposed with respect to a central major axis or a central minor axis of the bracket 42.
  • the position of the region where the hollow portion 426 is located is substantially opposite to the heat generating region of the projection device 100 (for example, a heat source or a wind channel in the projection device), and the position of the region where the solid portion 424 is located is substantially opposite to the projection device.
  • a non-heating area of 100 eg, an area within the projection device that is remote from a heat source or duct).
  • the outside air sequentially passes through the fixing frame 46 and the filter assembly 44, and then flows to the heat generating region of the projection device 100 via the hollow portion 426 of the bracket 42 to
  • the heat generation area of the projection apparatus 100 is concentrated to dissipate heat, and the air volume utilization rate and heat dissipation efficiency are improved.
  • the area of the filter assembly 44 corresponding to the solid portion 424 does not deposit impurities such as dust; and because the hollow portion 426 is
  • the solid portion 424 is symmetrically disposed with respect to a central major axis or a central minor axis of the bracket 42.
  • the filter assembly 44 When the filter assembly 44 is used for a period of time, the filter assembly 44 can be reversed relative to the front and back of the bracket 42 or the filter can be filtered.
  • the assembly 44 is rotated 180° so that a region of the filter assembly 44 where no impurities such as dust are deposited corresponds to the hollow portion 426, so that the filter device 44 can be used to dedust the projection device 100, making full use of the filtration.
  • Assembly 44 extends the useful life of filter assembly 44. It can be understood that the distribution of the hollow portion 426 and the solid portion 424 on the bracket 42 is not limited to the above embodiment, and may be set according to actual needs.
  • the bracket 42 is provided with a plurality of mesh openings, and the plurality of openings are selectively set to a plurality of through holes 422 and a plurality of blind holes 428, wherein the area in which the through holes 422 are provided is the hollow portion 426, and the area in which the blind holes 428 are provided is the solid portion 424 through the opposite hole
  • the different arrangement of the locations of the through holes 422 and the blind holes 428 i.e., by the different locations of the hollow portion 426 and the solid portion 424, may allow the bracket 42 to be used in a variety of locations where multiple sources of heat are used.
  • a plurality of snap protrusions 425 are disposed on the side surface 423 of the bracket 42.
  • the snap protrusion 425 cooperates with the snap groove to fix the bracket 42 to the outer casing 22.
  • a plurality of the latching protrusions 425 are respectively symmetrically disposed on the opposite side faces 423 of the bracket 42.
  • the inner walls of the opposite side walls 225 of the outer casing 22 are respectively disposed.
  • a snap groove that cooperates with the snap protrusion 425.
  • the plurality of latching protrusions 425 can also be disposed on the three or four side surfaces 423.
  • the latching slots are matched with the latching protrusions 425.
  • the latching protrusion 425 and the latching slot can be omitted.
  • the bracket 42 can be fixedly connected to the outer casing 22 by other connecting structures or manners, such as welding. .
  • the filter assembly 44 is located on a side of the bracket 42 remote from the outer casing 22.
  • the filter assembly 44 is configured to filter fine dust particles in the outside air to prevent the fine dust particles from entering the interior of the projection device 100.
  • the filter assembly 44 is a filter mesh, and the filter mesh may be made of a sponge or a non-woven material.
  • One side of the filter assembly 44 is recessed to form two avoidance slots 442.
  • the position of the avoidance groove 442 corresponds to the position of the buckle 427. It can be understood that in other embodiments, the filter assembly 44 can also be a dustproof baffle.
  • the fixing frame 46 is substantially in the shape of a rectangular frame, and is disposed on a side of the filter assembly 44 away from the bracket 42 and covers the mounting opening 226.
  • the filter assembly 44 is clamped between the bracket 42 and the mount 46.
  • a flange 462 is formed on the bottom edge of the fixing frame 46.
  • the flange 462 is formed to extend toward the bracket 42 and is located below the filter assembly 44 and the bracket 42.
  • the flange 462 is used to connect an external component, and the dust filter structure 40 is mounted on the external component.
  • the flange 462 is inserted into the connecting groove of the lower casing 223 as an external component, so that the fixing bracket 46 is connected to the external component, and the dustproof filter structure 40 is integrally mounted as a whole.
  • the outer casing 22 of the outer member and by the engagement of the flange 426 with the connecting groove, allows the fixing bracket 46 to be detachably connected to the outer casing 22.
  • the fixing frame 46 is further provided with two hooks 464. The positions of the two hooks 464 correspond to the positions of the two latches 427, and are respectively fastened to the corresponding latches 427 to The fixing bracket 46 is fastened to the bracket 42.
  • the hook 464 and the buckle 427 have a structure similar to the pop-up retracting structure of the ballpoint pen; when the fixing frame 46 is pushed toward the bracket 42 to insert the hook 464 into the buckle 427 After the middle, the hook 464 and the buckle 427 are elastically locked; after locking, when the upper sides of the fixing frame 46 are pressed inward, the hook 464 is disengaged from the buckle 427.
  • the fixing bracket 46 is detachably connected to the bracket 42.
  • the grill 46 is further provided with a plurality of grilles 466 for external airflow into the dust filter structure 40, and the plurality of grilles 466 can perform primary filtering on the outside air.
  • the bracket 42 When assembled, the bracket 42 is first fixedly coupled to the outer casing 22; secondly, the filter assembly 44 is placed outside the bracket 42; the retainer 46 is again directed from the outer side of the filter assembly 44 toward the body of the projection device 100. 20 moves, the hem 462 is first inserted into the connecting slot, and then the retaining frame 46 is pushed inwardly, so that the hook 464 is inserted into the corresponding latch 427 through the avoidance slot 442 of the filter assembly 44. Engage.
  • the filter assembly 44 can be replaced by the frame 46.
  • the flange 462 can be disposed on either side of the fixing frame 46, and correspondingly, a connecting groove that cooperates with the flange 462 is disposed on the outer casing 22 Upper housing 221 or lower housing 223 or side wall 225.
  • the flange 462 and the connecting groove may be omitted as long as the hook 464 on the fixing bracket 46 is fastened to the buckle 427 of the bracket 42 and the The filter assembly 44 is clamped between the holder 46 and the bracket 42.
  • the latch 427 can be disposed at any position of the bracket 42 , and correspondingly, the position of the hook 464 disposed on the bracket 46 and the avoidance
  • the position of the slot 442 disposed on the filter assembly 44 varies with the change of the position of the latch 427 as long as the hook 464 can pass through the avoidance slot 442 and be inserted into the latch 427 for engagement.
  • the fixing frame 46 and the filter assembly 44 may be detachably fixed to the bracket 42.
  • the avoidance groove 442 can be omitted as long as the hook 464 can pass through the filter assembly 44 and be fastened to the buckle 427, and the filter The assembly 44 is clamped and fixed between the holder 46 and the bracket 42.
  • the fixing bracket 46 can be omitted as long as the filter assembly 44 is fixed relative to the bracket 42 .
  • the filter assembly 44 is fixedly connected to the bracket 42 by screws.
  • the bracket 42 and the filter assembly 44 are sequentially disposed at the mounting opening 226 of the projection device 100, and the filter assembly 44 covers the mounting opening 226, and the dustproof filter structure 40 having the structure is provided. It can be applied to the internal space of the device to filter the airflow circulating inside the device.
  • the dust filter structure 40 of the present invention can be applied to any other device that needs to dissipate air, in addition to being applied to the projection device 100, and the dust filter structure 40 is used for heat dissipation of the air.
  • the cold air drawn in the device is filtered to prevent impurities in the air from entering the interior of the device.
  • the dust filter structure 40 of the present invention is provided with a hollow portion 426 and a solid portion 424 on the bracket 42 such that the region where the hollow portion 426 is located substantially faces the heat generating region of the projection device 100, so that the solid portion The region where the portion 424 is located is substantially opposite to the non-heating region of the projection device, so that outside air is concentrated from the hollow portion 426 corresponding to the heat generating region of the projection device 100, thereby improving heat dissipation efficiency and air volume utilization.
  • the area where the filter assembly 44 corresponding to the solid portion 424 is located can be reversed or reversed or rotated 180°.
  • the dust removal of the projection device 100 is continued, so that the filter assembly can be fully utilized to extend the service life of the filter assembly.
  • the bracket 42 is fixedly coupled to the outer casing 22, and the hook 464 on the fixing bracket 46 is fastened to the buckle 427 of the bracket 42 through the filter assembly 44, Therefore, the fixing frame 46 and the filter assembly 44 are detachably coupled to the bracket 42 so that the bracket 42 is not pulled out together when the fixing bracket 46 is detached, which facilitates the user to disassemble and replace the filter.
  • Component 44 is provided

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Projection Apparatus (AREA)

Abstract

一种防尘过滤结构（40），其包括支架（42）以及过滤组件（44），支架（42）位于过滤组件（44）的一侧。支架（42）包括实心部分（424）以及空心部分（426），通过过滤组件（44）的空气被实心部分（424）所阻挡且能够经由空心部分（426）通过支架（42）。该防尘过滤结构（40），通过在支架（42）上设置空心部分（426）与实心部分（424），并调整空心部分（426）与实心部分（424）的分布情况，使空心部分（426）所在的区域大致正对投影装置（100）的发热区域，并使实心部分（424）所在的区域大致正对投影装置（100）的非发热区域，从而使外界空气从与投影装置（100）的发热区域相对应的空心部分（426）集中进风，提高了散热效率以及风量利用率。

Description

防尘过滤结构及具有其的投影装置 技术领域
本实用新型涉及空气散热过滤领域，尤其涉及一种防尘过滤结构以及应用该防尘过滤结构的投影装置。
 背景技术
随着科技的发展，投影装置(如投影仪)在生活和工作中的应用越来越广泛。投影装置是一种将电能转化为光能的大功率设备，其组成结构包括有多个在工作过程中产生大量热量的热源，例如光源、色轮、光调制器等。现有投影装置中，一般通过强制对流对热源进行散热。在进行强制对流时，投影装置周围环境中的灰尘、杂质等微颗粒随着空气一起进入投影装置，并在投影装置内部进行累积，影响投影装置的散热性能；尤其严重的是，投影装置内部的光学元器件的性能受空气中的微尘颗粒的影响很大，如果微尘进入光路部分会直接导致图像质量的下降甚至元器件损伤，为此要求投影装置具有良好的防尘性能。
 技术问题
现有的一种投影装置，其防尘过滤结构设置于其外壳上。所述防尘过滤结构包括过滤组件以及装配为一体的上、下壳体，其中所述过滤组件容置于上、下壳体中，且所述下壳体与投影装置的外壳相连接。上、下壳体以及过滤组件中均开设有相互连通的通孔。然而，开设于下壳体上的通孔，一般覆盖了下壳体的整个表面区域。因此，由外部流入投影装置中的空气，除了流入投影装置内与热源相对应的区域外，还会流入投影装置内部远离热源的区域，由此，降低了风能的利用率，且降低了散热效率。
 技术解决方案
鉴于上述状况，有必要提供一种提高风量利用率的防尘过滤结构及应用所述防尘过滤结构的投影装置。
一种防尘过滤结构，其包括支架以及过滤组件，所述支架位于所述过滤组件的一侧。所述支架包括实心部分以及空心部分,通过所述过滤组件的空气被所述实心部分所阻挡且能够经由所述空心部分通过所述支架。
作为一种优选方案，所述实心部分与所述空心部分相对所述支架的中心长轴或中心短轴对称设置。
作为一种优选方案，所述支架上设置有多个网状开孔，所述多个网状开孔选择性地设为多个通孔以及多个盲孔，其中设有所述通孔的区域为所述空心部分，设有所述盲孔的区域为所述实心部分。
作为一种优选方案，至少部分通孔的侧壁为斜面。
作为一种优选方案，所述防尘过滤结构还包括固定架，所述固定架上设置有多个格栅，所述过滤组件夹设于所述固定架与所述支架之间；所述支架上设置有锁扣，所述固定架上设置有卡勾，所述卡勾穿过所述过滤组件并卡合于所述锁扣中。
作为一种优选方案，所述过滤组件上开设有供所述卡勾穿过的避位槽。
作为一种优选方案，所述固定架的侧壁上设置有折边，所述折边朝向所述支架延伸形成，并位于所述过滤组件以及所述支架的同一侧，所述折边用于连接外部元件。
一种投影装置，其包括外壳以及上述任一种防尘过滤结构，所述支架与所述外壳固定连接。
作为一种优选方案，所述支架的至少一侧壁上设置有卡接凸起，所述外壳的侧壁上设置有与所述卡接凸起相配合的卡接槽，所述卡接凸起卡接于所述卡接槽中。
作为一种优选方案，所述外壳包括相对设置的上壳体与下壳体，以及连接所述上壳体与下壳体的三个侧壁，所述上壳体、下壳体以及两个相对设置的侧壁的同一端共同围成一安装口，所述支架以及过滤组件依序设置于所述安装口处，且所述过滤组件封盖所述安装口。
 有益效果
本实用新型的防尘过滤结构，通过在支架上设置空心部分与实心部分，并调整空心部分与实心部分的分布情况，使空心部分所在的区域大致正对投影装置的发热区域，并使实心部分所在的区域大致正对投影装置的非发热区域，从而使外界空气从与所述投影装置的发热区域相对应的空心部分集中进风，提高了散热效率以及风量利用率。
 附图说明
图1为本实用新型一实施方式的投影装置的局部分解图。
图2为图1所示投影装置的光路结构图。
图3为本实用新型一实施方式的防尘过滤结构的立体图。
图4为图3所示防尘过滤结构的分解图。
图5为本实用新型一实施方式的支架的剖视图。
主要元件符号说明
投影装置 100
本体 20
外壳 22
上壳体 221
下壳体 223
侧壁 225
安装口 226
光源 24
色轮 25
光中继系统 26
光调制器 27
投影透镜单元 28
防尘过滤结构 40
支架 42
表面 421
通孔 422
侧面 423
实心部分 424
卡接凸起 425
空心部分 426
锁扣 427
盲孔 428
过滤组件 44
避位槽 442
固定架 46
折边 462
卡勾 464
格栅 466
如下具体实施方式将结合上述附图进一步说明本实用新型。
 本发明的最佳实施方式
为使本实用新型的上述目的、特征和优点能够更加明显易懂，下面结合附图对本实用新型的具体实施方式做详细的说明。
在下面的描述中阐述了很多具体细节以便于充分理解本实用新型，但是本实用新型还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本实用新型内涵的情况下做类似应用，因此本实用新型不受下面公开的具体实施例的限制。
其次，本实用新型结合示意图进行详细描述，在详述本实用新型实施例时，为便于说明，表示器件结构的剖面图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本实用新型保护的范围。此外，在实际制作中应包含长度、宽度及深度的三维空间尺寸。
需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“向内”、“自右至左”、“长轴”、“短轴”、“下方”以及类似的表述只是为了说明的目的。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
下面通过实施方式进行详细描述。
请参阅图1，图1为本实用新型一实施方式的投影装置的局部分解图。所述投影装置100包括本体20以及设置于所述本体20上的防尘过滤结构40。
请一并参阅图2，图2为投影装置的本体的光路结构图。所述本体20包括外壳22，设置于所述外壳22中的光源24、色轮25、光中继系统26与光调制器27，以及设置于所述外壳22上并部分露出于所述外壳22外的投影透镜单元28。
所述外壳22包括相对设置的上壳体221与下壳体223，以及连接上壳体221与下壳体223的三个侧壁225。所述上壳体221、所述下壳体223以及所述三个侧壁225共同组成一收容腔（图未示），用于收容所述光源24、所述色轮25、所述光中继系统26、所述光调制器27以及部分投影透镜单元28。所述上壳体221未与所述侧壁225相连的一端，所述下壳体223未与所述侧壁225相连的一端，以及两个相对设置的侧壁225未与其他侧壁225相连的一端合围形成安装口226。所述安装口226用于安装所述防尘过滤结构40，并与所述收容腔相连通，以使外界空气可由所述防尘过滤结构40流入所述收容腔内，以对所述投影装置100的发热元件进行散热。至少一个侧壁225邻近所述安装口226的一端设置有多个卡接槽（图未示）。所述下壳体223邻近所述安装口226的一端开设有连接槽（图未示）。
所述光源24用于发出激发光，如蓝色激发光，所述光源24可以为蓝色激光光源（或称蓝色激光器）。在一种变更实施方式中，所述光源24也可以是其他颜色的光源，并不以蓝色光源为限，如所述光源24可以是紫外激光光源（或称紫外激光器），从而发出紫外激发光。进一步地，所述光源24优选为半导体激光光源，用以提供高亮度的激发光。
所述色轮25设置于所述光源24发出的激发光的光路上，用于接收所述光源24的发出的激发光并射出所述至少两种颜色的光。所述色轮25可以为圆盘状的色轮，用于依序射出所述至少两种颜色的光（如红绿蓝三色光、黄蓝两色光等）。具体地，所述色轮25上可以设置有荧光材料，所述荧光材料受所述激发光的激发可以产生另一种或两种颜色的受激光（如红绿黄等颜色的受激光），从而所述色轮可以射出至少两种颜色的光。
本实施方式中，所述色轮25为透射式色轮，即所述光源24的光从所述色轮25的一侧入射，并且所述色轮25的另一侧射出所述至少两种颜色的光。当然，在一种变更实施方式中，所述色轮也可以为反射式色轮25。
所述光中继系统26设置于所述光源24的一侧，用于将所述色轮25射出的光进行匀光、收集及整形（例如，使得光束的投射光斑符合预定形状）等处理后提供至所述光调制器27。
所述光调制器27设置于所述光中继系统26与所述投影透镜单元28之间，用于依据输入图像数据对经由所述光中继系统26入射到所述光调制器27的光束进行图像调制以产生调制图像光线，并将所述调制图像光线传输至所述投影透镜单元28。所述光调制器27可以包括反射型光调制器或者透射型光调制器。其中，来自光源24的光束入射到反射型光调制器的前表面上，并从该反射型光调制器被反射传输至所述投影透镜单元28；或者，来自光源24的光束入射到投射型光调制器的前表面上，并穿过该投射型光调制器传输至所述投影透镜单元28。反射型光调制器包括反射型光阀（数字微镜装置，DMD），所述反射型光阀包括多个与像素数量相同的微小镜子，通过电子地或机械地改变各个镜子的角度，进入反射型光阀前表面的光束被调制和反射。
所述投影透镜单元28用于将入射的调制图像光线进行放大，并将所述调制图像光线向屏幕（图未示）进行投影以显示预定图像。
请一并参阅图3以及图4，图3为一实施方式的防尘过滤结构的立体图，图4为图3所示防尘过滤结构的分解图。所述防尘过滤结构40包括支架42、过滤组件44以及固定架46。所述支架42、所述过滤组件44以及所述固定架46自右至左依序设置于所述外壳22上，其中所述过滤组件44夹设于所述支架42与所述过滤组件44之间。
所述支架42装设于相对设置的两个侧壁225的同一端。具体在图示实施方式中，所述支架42装设于所述相对设置的两个侧壁225的内壁上，并与所述安装口226轴向之间间隔预设距离，以便所述过滤组件44以及固定架46均能容置于所述外壳22中，且使所述固定架46能够封盖所述安装口226。可以理解的是，在其他实施方式中，所述支架42可装设于相对设置的两个侧壁225的同一端，并封盖所述安装口226，此时所述过滤组件44以及固定架46外挂于所述外壳22上。所述支架42大致为矩形板状，其包括相对设置的两个表面421以及连接所述两个表面421的四个侧面423。所述四个侧面423依次首尾连接。所述支架42还包括间隔设置的实心部分424以及空心部分426。换句话说，所述支架42被划分为多个部分，其中一部分为实心部分424，其中另一部分为空心部分426，所述实心部分424以及空心部分426可拼接形成所述支架42。
请一并参阅图5，所述支架42的实心部分424为多孔结构。所述实心部分424上设置有多个盲孔428。所述盲孔428可仅贯通所述支架42的一个表面421，或者所述盲孔428的两端分别贯通所述支架42的两个表面421，且所述盲孔428的中间被隔断，使所述盲孔428的两端不能够连通。所述实心部分424用于阻断空气的流通，换句话说，通过过滤组件44的空气不能够经由所述实心部分424通过所述支架42。可以理解的是，在其他实施方式中，所述实心部分424还可为板状结构，例如所述实心部分424为一实心板。所述支架42的空心部分426为多孔结构。所述空心部分426设置有多个通孔422。所述通孔422贯通所述支架42的两个表面421。所述通孔422用于供空气流通，换句话说，通过过滤组件44的空气能够经由所述空心部分424的通孔422通过所述支架42。可以理解的是，所述空心部分426可仅为开孔结构,其上设置的通孔422的数量可以为一个，也可以为多个。
进一步地，所述通孔422的侧壁为斜面，以更好地引导风流通过所述通孔422。可以理解的是，多个通孔422中，可以仅部分通孔422的侧壁为斜面。
所述支架42的表面421上还设置有两个锁扣427。具体在图示实施方式中，所述两个锁扣427设置于所述表面421的上边缘。可以理解的是，所述锁扣427的数量可以为一个或者超过两个。所述锁扣427用于组装所述固定架46。
进一步地，所述实心部分424与所述空心部分426相对所述支架42的中心长轴或中心短轴对称设置。其中，所述空心部分426所在区域的位置大致正对所述投影装置100的发热区域（例如投影装置内的热源或风道），所述实心部分424所在区域的位置大致正对所述投影装置100的非发热区域（例如投影装置内远离热源或风道的区域）。因此，在投影装置内部设置的风扇的吸力作用下,外界空气依次经过所述固定架46以及过滤组件44后,再经由所述支架42的空心部分426流向所述投影装置100的发热区域,以对所述投影装置100的发热区域集中进行散热，提高了风量利用率以及散热效率。另外，由于外界空气不能通过支架42上的实心部分424，因此，所述过滤组件44上与所述实心部分424相对应的区域不会沉积灰尘等杂质；且由于所述空心部分426与所述实心部分424相对所述支架42的中心长轴或中心短轴对称设置，当所述过滤组件44使用一段时间后，可将过滤组件44相对所述支架42的正反面进行对调或将所述过滤组件44旋转180°，以使所述过滤组件44上未沉积灰尘等杂质的区域与所述空心部分426相对应，从而可继续使用所述过滤组件44对投影装置100进行除尘，充分利用了过滤组件44，延长了过滤组件44的使用寿命。可以理解的是，所述支架42上的空心部分426与实心部分424的分布情况并不限于上述实施方式，其可依据实际需要进行设置。
可以理解的是，当所述空心部分426以及实心部分424均为多孔结构时，换句话说，所述支架42上设置有多个网状开孔，所述多个开孔选择性地设为多个通孔422以及多个盲孔428，其中设有所述通孔422的区域为所述空心部分426，设有所述盲孔428的区域为所述实心部分424，通过对开孔中的通孔422和盲孔428的位置的不同设置，即通过空心部分426以及实心部分424的位置的不同设置，可以使得所述支架42适用于多种热源不同位置的场合。
进一步，所述支架42的侧面423上设置有多个卡接凸起425。所述卡接凸起425与所述卡接槽相配合，以使所述支架42固定连接于所述外壳22上。优选地，多个卡接凸起425分别对称地设置于所述支架42的相对设置的两个侧面423上，此时，所述外壳22相对设置的两个侧壁225的内壁上分别设置有与所述卡接凸起425相配合的卡接槽。可以理解的是，在其他实施方式中，多个卡接凸起425还可分散设置于三个或四个侧面423上，此时，与所述卡接凸起425相配合的卡接槽设置于所述外壳22的两个相对设置的侧壁225、及/或上壳体221、及/或下壳体223上。
可以理解的是，在其他实施方式中，所述卡接凸起425以及卡接槽可以省略，此时所述支架42可采用其他连接结构或方式，例如焊接，将支架42与外壳22固定连接。
请再次参阅图4，所述过滤组件44位于所述支架42远离所述外壳22的一侧。所述过滤组件44用于过滤外界空气中的微尘颗粒，避免微尘颗粒进入所述投影装置100内部。本实施方式中，所述过滤组件44为过滤网，所述过滤网可由海绵或无纺布材料制成。所述过滤组件44的一侧边凹设形成有两个避位槽442。所述避位槽442的位置与所述锁扣427的位置相对应。可以理解的是，在其他实施方式中，所述过滤组件44还可为防尘挡板。
所述固定架46大致为矩形框状，其设置于所述过滤组件44远离所述支架42的一侧，并封盖所述安装口226。所述过滤组件44夹紧于所述支架42与所述固定架46之间。所述固定架46的底边上形成有一折边462。本实施方式中，所述折边462朝向所述支架42延伸形成，并位于所述过滤组件44以及所述支架42的下方。所述折边462用于连接外部元件，使所述防尘过滤结构40装设于外部元件上。本实施方式中，所述折边462插入作为外部元件的下壳体223的连接槽中，以使所述固定架46连接在外部元件上，进而将所述防尘过滤结构40整体安装于作为外部元件的外壳22上，且通过所述折边426与所述连接槽的配合，可使所述固定架46与所述外壳22实现可分离连接。所述固定架46上还设置有两个卡勾464，所述两个卡勾464的位置与所述两个锁扣427的位置相对应，并分别扣合于相应的锁扣427上，以将所述固定架46与所述支架42进行紧固连接。本实施方式中，所述卡勾464与锁扣427具有与圆珠笔的弹出缩回结构相类似的结构；当所述固定架46向所述支架42推进以使卡勾464插设于锁扣427中后，卡勾464与锁扣427弹性锁紧；锁紧后，当向内按压所述固定架46的上部两侧，卡勾464与锁扣427脱离。由此，所述固定架46与所述支架42可拆卸地连接。所述固定架46上还开设有多个格栅466，用于供外界气流流入所述防尘过滤结构40中，且所述多个格栅466可对外界空气进行初级过滤。
组装时，首先将支架42与外壳22固定连接；其次将过滤组件44置于所述支架42的外侧；再次将所述固定架46由所述过滤组件44的外侧朝向所述投影装置100的本体20移动，使折边462先插入连接槽中，再继续向内推进所述固定架46，使所述卡勾464穿过所述过滤组件44的避位槽442插入相应的锁扣427中进行卡合。
更换过滤组件时，使用者向内轻轻按压所述固定架46的上部两侧，所述卡勾464与所述锁扣427相脱离，且所述固定架46的上部弹出，取出所述固定架46即可更换所述过滤组件44。
可以理解的是，在其他实施方式中，所述折边462可设置于所述固定架46的任一侧边，相应的，与所述折边462相配合的连接槽设置于所述外壳22的上壳体221或下壳体223或侧壁225。
可以理解的是，在其他实施方式中，所述折边462以及连接槽可以省略，只要所述固定架46上的卡勾464扣合于所述支架42的锁扣427上，且使所述过滤组件44夹紧于固定架46与支架42之间即可。
可以理解的是，在其他实施方式中，所述锁扣427可设置于所述支架42的任意位置，相应的，所述卡勾464在所述固定架46上设置的位置以及所述避位槽442在所述过滤组件44上设置的位置随同所述锁扣427位置的改变而改变，只要所述卡勾464能穿过所述避位槽442并插入所述锁扣427进行卡合，以将所述固定架46以及过滤组件44可拆卸地固定于所述支架42上即可。
可以理解的是，在其他实施方式中，所述避位槽442可以省略，只要所述卡勾464能够穿过所述过滤组件44并扣合于所述锁扣427上，并将所述过滤组件44夹紧固定于所述固定架46与所述支架42之间即可。
可以理解的是，在其他实施方式中，所述固定架46可以省略，只要所述过滤组件44相对所述支架42固定即可，例如，所述过滤组件44通过螺钉固定连接于所述支架42上，此时所述支架42以及过滤组件44依序设置于投影装置100的安装口226处，且所述过滤组件44封盖所述安装口226，且具有该种结构的防尘过滤结构40可应用于装置的内部空间中，对在装置内部流通的气流进行过滤。
可以理解的是，本实用新型的防尘过滤结构40除了应用在投影装置100上外，还可应用在其他任意需进行空气散热的装置,所述防尘过滤结构40用于对需要进行空气散热的装置中抽入的冷空气进行过滤,以避免空气中的杂质进入装置内部。
本实用新型的防尘过滤结构40，通过在支架42上设置空心部分426与实心部分424，且使所述空心部分426所在的区域大致正对所述投影装置100的发热区域，使所述实心部分424所在的区域大致正对所述投影装置的非发热区域，从而使外界空气从与所述投影装置100的发热区域相对应的空心部分426集中进风，提高了散热效率以及风量利用率。另外，根据支架42上的空心部分426与实心部分424的分布情况，使与所述实心部分424相对应的过滤组件44所在的区域在被进行正反面对调或进行180°旋转后，能够与所述空心部分426的位置相对应，进而继续对投影装置100进行除尘，从而能够充分利用过滤组件，延长过滤组件的使用寿命。再者，通过将所述支架42固定连接于所述外壳22上，并将所述固定架46上的卡勾464穿过所述过滤组件44扣合于所述支架42的锁扣427上，从而使所述固定架46以及所述过滤组件44可拆卸地连接于所述支架42上，从而在拆卸固定架46时，所述支架42不会被一起拔出，方便了使用者拆卸更换过滤组件44。
以上实施方式仅用以说明本实用新型的技术方案而非限制，尽管参照以上较佳实施方式对本实用新型进行了详细说明，本领域的普通技术人员应当理解，可以对本实用新型的技术方案进行修改或等同替换都不应脱离本实用新型技术方案的精神和范围。

Claims (10)

1.一种防尘过滤结构，其包括支架以及过滤组件，所述支架位于所述过滤组件的一侧，其特征在于：所述支架包括实心部分以及空心部分,通过所述过滤组件的空气被所述实心部分所阻挡且能够经由所述空心部分通过所述支架。
2.如权利要求1所述的防尘过滤结构，其特征在于：所述实心部分与所述空心部分相对所述支架的中心长轴或中心短轴对称设置。
3.如权利要求1所述防尘过滤结构，其特征在于：所述支架上设置有多个网状开孔，所述多个网状开孔选择性地设为多个通孔以及多个盲孔，其中设有所述通孔的区域为所述空心部分，设有所述盲孔的区域为所述实心部分。
4.如权利要求3所述的防尘过滤结构，其特征在于：至少部分通孔的侧壁为斜面。
5.如权利要求1所述的防尘过滤结构，其特征在于：所述防尘过滤结构还包括固定架，所述固定架上设置有多个格栅，所述过滤组件夹设于所述固定架与所述支架之间；所述支架上设置有锁扣，所述固定架上设置有卡勾，所述卡勾穿过所述过滤组件并卡合于所述锁扣中。
6.如权利要求5所述的防尘过滤结构，其特征在于：所述过滤组件上开设有供所述卡勾穿过的避位槽。
7.如权利要求5所述的防尘过滤结构，其特征在于：所述固定架的侧壁上设置有折边，所述折边朝向所述支架延伸形成，并位于所述过滤组件以及所述支架的同一侧，所述折边用于连接外部元件。
8.一种投影装置，其包括外壳以及如权利要求1-7中任一项所述的防尘过滤结构，所述支架与所述外壳固定连接。
9.如权利要求8所述的投影装置，其特征在于：所述支架的至少一侧壁上设置有卡接凸起，所述外壳的侧壁上设置有与所述卡接凸起相配合的卡接槽，所述卡接凸起卡接于所述卡接槽中。
10.如权利要求8所述的投影装置，其特征在于：所述外壳包括相对设置的上壳体与下壳体，以及连接所述上壳体与下壳体的三个侧壁，所述上壳体、下壳体以及两个相对设置的侧壁的同一端共同围成一安装口，所述支架以及过滤组件依序设置于所述安装口处，且所述过滤组件封盖所述安装口。
PCT/CN2017/086176 2016-09-05 2017-05-26 防尘过滤结构及具有其的投影装置 Ceased WO2018040635A1 (zh)

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