Patent Publication Number: US-2022228737-A1

Title: Simple light-blocking and air-exhausting device, and stage light fixture including same

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of International Application No. PCT/CN2020/072469, filed on Jan. 16, 2020, which claims priority from Chinese Patent Application No. 201910471864.4 filed on May 31, 2019, all of which are hereby incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present invention relates to the field of heat dissipation techniques of light fixtures, in particular to a simple light-blocking and air-exhausting device and a stage light fixture including the same. 
     BACKGROUND 
     To ensure a normal service life of a light source of a stage light fixture, it is required to maintain a relatively stable environment. Therefore, the light source is usually placed in a relatively closed small environment. An outside of the light source is provided with a fan device for blowing cold air outside a light source chamber into a closed space of the light source chamber. An air outlet is provided in the closed space of the light source chamber, so that hot air flow in the light source chamber flows outside of the light fixture body through the air outlet. Since strong light exists within the light source chamber, it is required to provide a light-blocking structure at the air outlet so as to prevent light leakage from affecting the light fixture effect. The configuration of the light-blocking structure can facilitate air exhaust, be effective in light blocking, and be easily removed for replacement of the light source. In order to meet the requirements, in related art a window-shade radiator is configured at the air outlet. However, a structure and a manufacturing process of such radiator are generally complicated, and both frame and blades of the window-shade radiator need to be separately produced and assembled, thus resulting in higher cost. 
     SUMMARY 
     The present invention thus provides a simple light-blocking and air-exhausting device, which is simple in structure and manufacturing process, low in cost, and has a better light-blocking and ventilation effect at the same time. 
     According to the present invention, the simple light-blocking and air-exhausting device includes a ventilation plate and a light-blocking plate arranged oppositely and spaced apart from each other. The ventilation plate is provided with an air vent formed by die-cutting of the ventilation plate. Vertical projection of the light-blocking plate on the ventilation plate overlaps the air vents. 
     In the present invention, the vertical projection of the light-blocking plate on the ventilation plate is configured to overlap the air vent on the ventilation plate, so that the light-blocking plate can prevent light from leaking out of the air vent, while air flow can flow out from a gap between the light-blocking plate and the ventilation plate. The light-blocking plate and the ventilation plate are common flat plates without any special design, which can be directly formed by die-cutting. The air vent provided on the ventilation plate are also formed by die-cutting, so that the air vent can be processed simultaneously when the ventilation plate is manufactured, which results in easy manufacturing of the entire simple light-blocking and air-exhausting device compared to manufacturing a window-shade radiator, achieving a better light-blocking and ventilation effect with only two common flat plates fixed to each other, and effective assembly time reduction and lower production costs. 
     A side plate that surrounds the light-blocking plate is further provided at one side of the ventilation plate close to the light-blocking plate. The configuration of the side plate can prevent the hot air flow from flowing out of a gap between the ventilation plate and a sealed chamber, so that even when the ventilation plate or the sealed chamber has protrusion or unevenness during manufacture, or when the both cannot fit closely due to vibration in use, or when the ventilation plate moves up or down, the side plate can act as an air guiding channel so as to smoothly direct the hot air flow out of a housing. 
     A height of the side plate is smaller than a minimum distance between the ventilation plate and the light-blocking plate. This facilitates the hot air flow to enter between the light-blocking plate and the ventilation plate. 
     The side plate has an annular shape with larger size than the light-blocking plate. This facilitates the hot air flow between the light-blocking plate and the ventilation plate, so that the hot air flow can be directed out of the housing. 
     The ventilation plate can include an air-permeable plate and a substrate attached to each other. The air-permeable plate is provided with a first air vent. The substrate is provided with a second air vent corresponding to the first air vent. The substrate is located at one side of the air-permeable plate close to the light-blocking plate. The side plate is located on the substrate. The air-permeable plate is generally thick, and the side plate has no requirement for thickness, thus if the side plate is provided directly on the air-permeable plate, the both need to be welded and assembled together after separate production, or the side plate needs to be machined on the air-permeable plate, which leads to a cumbersome and costly process. The additional substrate is provided to arrange the side plate on the substrate, so that the whole can be formed directly after punching and folding by using plates, which is convenient and efficient. 
     The ventilation plate is provided with a pull rod outside a projection area of the light-blocking plate, the pull rod has a length larger than a maximum distance between the light-blocking plate and the ventilation plate. An end of the pull rod is provided with a block. The pull rod can prevent the device from falling after being disassembled, and plays a certain role in safety protection. By pulling and rotating the pull rod, the air outlet can be opened or closed. 
     The pull rod and the light-blocking plate are preferably on the same side of the ventilation plate, so that the entire simple light-blocking and air-exhausting device occupies a smaller space, and the installation is more convenient. 
     Alternatively, the ventilation plate includes an air-permeable plate and a fixing plate attached to each other. The air-permeable plate is provided with a first air vent. The fixing plate is provided with a third air vent corresponding to the first air vent. The fixing plate is located at one side of the air-permeable plate close to the light-blocking plate, and the pull rod is in a fixed connection with the fixing plate. Screw holes are provided in the air-permeable plate to secure the air-permeable plate, so that the fixing plate is separately provided to secure the pull rod, which can thus prevent that a set screw of the pull rod is removed by mistake when the air-permeable plate is disassembled, avoiding falling of the ventilation plate. 
     The first air vent includes a plurality of strip-shaped holes arranged in parallel, which avoids that debris or rain enters the first air vent due to too large hole. 
     Further, several support bases are provided between the light-blocking plate and the ventilation plate. A screw penetrates the light-blocking plate and each support base to connect with the ventilation plate. The support base can ensure a distance between the light-blocking plate and the ventilation plate. 
     The present invention also provides a stage light fixture including a light source chamber and the simple light-blocking and air-exhausting device described above. The light source chamber has an air outlet, the ventilation plate covers the air outlet, and the light-blocking plate is located within the light source chamber. 
     The light-blocking plate is located within the light source chamber. The light-blocking plate is initially used for light blocking, and then the ventilation plate covering the air outlet is used for ventilation. Such configuration can better prevent light from leaking out without affecting ventilation. 
     The side plate that surrounds the light-blocking plate is provided at one side of the ventilation plate close to the light-blocking plate, and an outer side wall of the side plate fits an annular side wall of the air outlet formed by the light source chamber. The side plate can prevent the hot air flow from flowing out of a gap between the ventilation plate and the light source chamber and entering an inside of the housing of the stage light fixture, which avoids a rising ambient temperature inside the housing of the stage light fixture. In addition, the outer side wall of the side plate fits the annular side wall of the air outlet formed by the light source chamber, so that when the simple light-blocking and air-exhausting device is installed, even when the ventilation plate or the light source chamber has protrusion or unevenness during manufacture, or when the both cannot fit closely due to vibration in use, or when the ventilation plate moves up or down, the side plate can act as an air guiding channel so as to smoothly direct the hot air flow out of the light source chamber and the housing of the stage light fixture without leakage. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an overall schematic structural view of a simple light-blocking and air-exhausting device according to the present invention; 
         FIG. 2  is an exploded structural schematic view of the simple light-blocking and air-exhausting device device according to the present invention; 
         FIG. 3  is a schematic cross-sectional structural view of the simple light-blocking and air-exhausting device according to the present invention; and 
         FIG. 4  is a schematic view of a mating structure of the simple light-blocking and air-exhausting device and a light source chamber according to the present invention. 
     
    
    
     DETAILED DESCRIPTION 
       FIGS. 1 to 3  show a simple light-blocking and air-exhausting device  100  according to some embodiments. The device  100  includes a ventilation plate  110  and a light-blocking plate  120  which are arranged oppositely and spaced apart from each other. The ventilation plate  110  is provided with an air vent  114  formed by die-cutting of the ventilation plate  110 . Vertical projection of the light-blocking plate  120  on the ventilation plate  110  overlaps the air vents  114 . 
     The vertical projection of the light-blocking plate  120  on the ventilation plate  110  is configured to overlap the air vent  114  on the ventilation plate  110 , so that the light-blocking plate  120  can prevent light from leaking out of the air vents  114 , while air flow can flow out from a gap between the light-blocking plate  120  and the ventilation plate  110 . The light-blocking plate  120  and the ventilation plate  110  are common flat plates without any special design, which can be directly formed by die-cutting. The air vent  114  provided on the ventilation plate  110  are also formed by die-cutting, so that the air vent  114  can be processed simultaneously when the ventilation plate  110  is manufactured, which results in easy manufacturing of the entire device  100  compared to manufacturing a window-shade radiator, achieving a better light-blocking and ventilation effect with only two common flat plates fixed to each other, and effective assembly time reduction and lower production costs. 
     The device  100  according to these embodiments is generally applied to a light source chamber  200  of a stage light fixture shown in  FIG. 4 . An air outlet  210  is provided on the light source chamber  200 , and the device  100  covers the air outlet  210  to achieve a light-blocking ventilation effect. 
     According to at least one embodiment, a side plate  1132  that surrounds the light-blocking plate  120  is provided at one side of the ventilation plate  110  close to the light-blocking plate  120 . The side plate  1132  can prevent the hot air flow from flowing out of a gap between the ventilation plate  110  and the light source chamber  200 , so that even when the ventilation plate  110  or the light source chamber  200  has protrusion or unevenness during manufacture, or when the both cannot fit closely due to vibration in use, or when the ventilation plate  110  moves up or down, the side plate  1132  can act as an air guiding channel so as to smoothly direct the hot air flow out of a housing. 
     A height of the side plate  1132  is preferably smaller than a minimum distance between the ventilation plate  110  and the light-blocking plate  120 . This facilitates the hot air flow to enter between the light-blocking plate  120  and the ventilation plate  110 . Preferably, a height range of the side plate  1132  is between 15 mm and 25 mm, and the minimum distance between the substrate  113  and the light-blocking plate  120  ranges between 25 mm and 35 mm. 
     A size of an annular shape formed by the side plate  1132  is larger than the light-blocking plate  120 . This facilitates the hot air flow between the light-blocking plate  120  and the ventilation plate  110 , so that the hot air flow can be directed out of the housing. Preferably, the annular shape formed by the side plate  1132  is similar to a shape of the light-blocking plate  120 , but with different size. 
     According to at least one embodiment, the ventilation plate  110  includes an air-permeable plate  111  and a substrate  113  attached to each other. The air-permeable plate  111  is provided with a first air vent  1111 . The substrate  113  is provided with a second air vent  1131  corresponding to the first air vent  1111 . The substrate  113  is located at one side of the air-permeable plate  111  close to the light-blocking plate  120 . The side plate  1132  is located on the substrate  113 . The air-permeable plate  111  is generally thick, and the side plate  1132  has no requirement for thickness. If the side plate  1132  is provided directly on the air-permeable plate  111 , the both need to be welded and assembled together after separate production, or the side plate  1132  needs to be machined on the air-permeable plate  111 , which leads to a cumbersome and costly process. The additional substrate  113  is provided to arrange the side plate  1132  thereon, so that the whole can be formed directly after punching and folding by using plates, which is convenient and efficient. 
     Preferably, the air-permeable plate  111  and the substrate  113  are made of metal material. 
     According to at least one embodiment, the ventilation plate  110  is provided with a pull rod  130  outside a projection area of the light-blocking plate  120  on the the ventilation plate  110 . The pull rod  130  has a length larger than a maximum distance between the light-blocking plate  120  and the ventilation plate  110 . An end of the pull rod  130  is provided with a block  131 . The pull rod  130  can prevent the device  100  from falling after being disassembled, and play a certain role in safety protection. By pulling and rotating the pull rod  130 , the air outlet  210  of the light source chamber  200  can be opened or closed to quickly replace the light source. 
     Preferably, the pull rod  130  and the light-blocking plate  120  are on the same side of the ventilation plate  110 . Such configuration makes the entire simple light-blocking and air-exhausting device  100  occupy a smaller space, and more convenient in installation. 
     According to some embodiments, the ventilation plate  110  includes an air-permeable plate  111  and a fixing plate  112  attached to each other. The fixing plate  112  is located at one side of the air-permeable plate  111  close to the light-blocking plate  120 . The air-permeable plate  111  is provided with a first air vent  1111 . The fixing plate  112  is provided with a third air vent  1121  corresponding to the first air vent  1111 . The pull rod  130  is in a fixed connection with the fixing plate  112 . Screw holes are provided in the air-permeable plate  111  to secure the air-permeable plate  111 , and the fixing plate  112  is separately provided to secure the pull rod  130 , it can thus avoid that a set screw  132  of the pull rod  130  is removed by mistake when the air-permeable plate  111  is disassembled, which causes the ventilation plate  110  to fall. 
     The air-permeable plate  111  and the fixing plate  112  are preferably made of metal material. 
     Optionally, the ventilation plate  110  can includes the air-permeable plate  111 , the fixing plate  112  and the substrate  113  that are sequentially attached toward to the light-blocking plate  120 . The air-permeable plate  111  is provided with the first air vent  1111 . The substrate  113  and the fixing plate  112  are provided with the second air vent  1131  and the third air vent  1121  respectively corresponding to the first air vent  1111 . The pull rod  130  is in a fixed connection with the fixing plate  112 . The side plate  1132  that surrounds the light-blocking plate  120  is provided at one side of the substrate  113  close to the light-blocking plate  120 . The screw holes are provided in the air-permeable plate  111  to secure the air-permeable plate  111  to the light source chamber  200 , and the fixing plate  112  is separately provided to secure the pull rod  130 , and thus it can avoid that the set screw  132  of the pull rod  130  is removed by mistake when the air-permeable plate  111  is disassembled from the light source chamber  200 , which causes the ventilation plate  110  to fall. The air-permeable plate  111 , the fixing plate  112 , and the substrate  113  are preferably made of metal material. 
     According to one embodiment, the air-permeable plate  111  covers a connection position of the fixing plate  112  and the pull rod  130 . The connection position of the fixing plate  112  and the pull rod  130  is hidden to better avoid the removal by mistake. 
     The first air vent  1111  includes a plurality of strip-shaped holes arranged in parallel, which avoids that debris or rain enters the first air vent  1111  due to too large hole. 
     When the ventilation plate  110  includes the air-permeable plate  111  and the fixing plate  112  attached to each other, the third air vent  1121  is a large continuous opening. 
     When the ventilation plate  110  includes the air-permeable plate  111 , the fixing plate  112 , and the substrate  113  that are sequentially attached, one of the first air vent  1111  and the second air vent  1131  includes a plurality of strip-shaped holes arranged in parallel, and the third air vent  1121  is a large continuous opening. 
     Some support bases  140  are provided between the light-blocking plate  120  and the ventilation plate  110 . A screw  141  penetrates the light-blocking plate  120  and each support base  140  to connect with the ventilation plate  110 . The support bases  140  can ensure a distance between the light-blocking plate  120  and the ventilation plate  110 . A nut of the screw  141  is located inside the light source chamber  200 , so that the appearance is more aesthetically pleasing and the ventilation plate  110  can be easily to be arranged in a multi-layered manner. 
     Connecting columns  1112  used to connect with the screw  141  are provided on the ventilation plate  110 . When the ventilation plate  110  includes the air-permeable plate  111 , the fixing plate  112 , and the substrate  113  that are sequentially attached, the connecting columns  1112  are located on the air-permeable plate  111 , and through holes corresponding to the connecting columns  1112  are provided on the fixing plate  112  and the substrate  113 . 
       FIG. 4  is shown a stage light fixture including a light source chamber  200  and the simple light-blocking and air-exhausting device described above. The light source chamber  200  has an air outlet  210 . The ventilation plate  110  covers the air outlet  210 , and the light-blocking plate  120  is located within the light source chamber  200 . 
     The light-blocking plate  120  is located within the light source chamber  200 . The light-blocking plate  120  is initially used for light blocking, and then the ventilation plate  110  covering the air outlet  210  is used for ventilation. Such configuration can better prevent light from leaking out without affecting ventilation. 
     In this embodiment, the side plate  1132  that surrounds the light-blocking plate  120  is provided at one side of the ventilation plate  110  closer to the light-blocking plate  120 , and an outer side wall of the side plate  1132  fits an annular side wall of the air outlet  210  formed by the light source chamber  200 . The side plate  1132  can prevent the hot air from flowing out of the gap between the ventilation plate  110  and the light source chamber  200  to enter an inside of the housing of the stage light fixture, which avoids a rising ambient temperature inside the housing of the stage light fixture. In addition, the outer side wall of the side plate  1132  fits the annular side wall of the air outlet  210  formed by the light source chamber  200 , so that even when the ventilation plate  110  or the light source chamber  200  has protrusion or unevenness during manufacture, or when the both cannot fit closely due to vibration in use, or when the ventilation plate  110  moves up or down, the side plate  1132  can act as an air guiding channel so as to smoothly direct the hot air flow out of the light source chamber  200  and the housing of the stage light fixture.