Self-breathing sealed stage lamp

Abstract

Disclosed in the present invention is a self-breathing sealed stage lamp, comprising a lamp head provided with a light source. A sealed cavity is formed in the lamp head, and a light emitting lens is used as a part of the side wall of the sealed cavity, wherein light emitted from the light source exits via the light emitting lens. The lamp head is further provided with a ventilation assembly for selectively communicating the sealed cavity with the outside, the ventilation assembly having a positive pressure activation value and a negative pressure activation value. When the pressure differential between the sealed cavity and the outside is greater than the positive pressure activation value or less than the negative pressure activation value, the ventilation assembly is opened to communicate the sealed cavity with the outside for ventilation, so as to keep the pressure differential between the sealed cavity and the outside within a reasonable range, thus avoiding impact of excessive pressure differential on the service life of rubber sealing rings, internal pressure-sensitive parts, etc. of lamps; when the pressure differential between the sealed cavity and the outside is between the positive pressure activation value and the negative pressure activation value, the ventilation assembly is closed to maintain sealing of the sealed cavity, thus preventing external water vapor from entering the sealed cavity and affecting the lighting effect or the service life of electronic components.

Description

A self-breathing sealed stage light Technical Field

[0001] The present invention relates to the technical field of stage lamps, and more particularly to a self-breathing sealed stage lamp. Background Art

[0002] Currently, waterproof stage lights all have such a problem: during use, the internal temperature of the lamp rises, the gas expands, and the internal air pressure increases; after the lamp is powered off after use, the internal part cools down and negative pressure appears again, which is particularly obvious in cold external environments. The positive and negative pressures inside the lamps are likely to affect the life of the sealing rubber rings and internal pressure-sensitive components on the lamps.

[0003] The current method for balancing internal and external air pressure is to add a waterproof vent valve or an air storage and expansion bag to the lamp. However, this method has a disadvantage: after the air pressure inside and outside the lamp is balanced, water molecules from the air can enter the lamp through the vent valve over time. This is particularly noticeable in areas with high humidity. If a certain amount of water molecules enter, some will cool and accumulate in the lens of the lamp, causing mist to form inside the lamp when the light is turned on, affecting the lighting effect. The disadvantage of adding an air storage and expansion bag is that the bag requires a larger structural space, which increases the product size accordingly. Technical issues

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a self-breathing sealed stage lamp, so that when the internal and external pressure difference of the lamp reaches a design threshold, the internal and external air pressures are balanced. After the internal and external pressure difference is less than the design threshold, the ventilation channel is closed, so that the internal space of the lamp remains completely closed, isolating external moisture from entering the interior of the lamp, and preventing the lamp from fogging. In addition, the structure is compact and does not require a lot of structural space. Technical Solutions

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a self-breathing sealed stage lamp, comprising a lamp head provided with a light source, a sealed cavity formed in the lamp head, a light-emitting lens as a part of the side wall of the sealed cavity, and the light emitted by the light source is emitted from the light-emitting lens; the lamp head is also provided with a ventilation component that selectively connects the sealed cavity with the outside world, the ventilation component has a positive pressure conduction value and a negative pressure conduction value, when the pressure difference between the sealed cavity and the outside world is greater than the positive pressure conduction value or less than the negative pressure conduction value, the ventilation component is connected to connect the sealed cavity with the outside world, and when the pressure difference between the sealed cavity and the outside world is between the positive pressure conduction value and the negative pressure conduction value, the ventilation component is closed to maintain the sealing of the sealed cavity.

[0006] Furthermore, the positive pressure conductance value is ≥300 Pa, and / or the negative pressure conductance value is ≤-300 Pa. In this way, the ventilation component will not be frequently turned on, and frequent ventilation will not cause excessive external water vapor to enter the sealing strength.

[0007] Furthermore, the positive pressure conductance value is ≤6000 Pa, and / or the negative pressure conductance value is ≥-6000 Pa. This way, the ventilation assembly will not fail to conduct when there is a large pressure difference between the sealed cavity and the outside world, which would affect the life of the sealing rubber ring and internal pressure-sensitive components on the lamp.

[0008] Furthermore, a drying device is included, which is used to dry the gas entering the sealed cavity when the pressure difference between the sealed cavity and the outside is less than the negative pressure conduction value. In this way, even if the outside air enters the sealed cavity, the water vapor will be absorbed by the drying device and cannot enter the sealed cavity.

[0009] Furthermore, when the pressure difference between the sealed cavity and the outside world exceeds the positive pressure conductance value, the gas discharged from the sealed cavity also passes through the drying device. In this way, when the pressure difference between the sealed cavity and the outside world exceeds the positive pressure conductance value due to the heat generated by the use of the lamp, the discharged hot air will dry the drying device, removing the moisture previously absorbed by it, and enabling its recycling.

[0010] Furthermore, the ventilation assembly further comprises a waterproof breathable membrane for filtering water vapor in the gas entering the sealed cavity. The waterproof breathable membrane can prevent water droplets from the outside from entering the sealed cavity, especially when ventilation is performed in rainy and foggy weather.

[0011] Furthermore, the waterproof breathable membrane is fixed in the waterproof breathable valve, and the waterproof breathable valve is connected to the air inlet of the ventilation component. By directly using the waterproof breathable valve, the installation of the waterproof breathable membrane is more convenient.

[0012] Furthermore, the ventilation assembly includes a cylinder, a piston located within the cylinder, and an elastic member for resetting the piston. The cylinder has a first air inlet and a first air outlet connected to the outside world, and a second air inlet and a second air outlet connected to the sealed chamber. The first air inlet, the second air inlet, the first air outlet, and the second air outlet are arranged in sequence. When the pressure difference between the sealed chamber and the outside world is between a positive pressure conductance value and a negative pressure conductance value, the elastic member maintains the piston and simultaneously blocks the second air inlet and the first air outlet, while exposing the first air inlet and the second air outlet. When the pressure difference between the sealed chamber and the outside world is greater than the positive pressure conductance value or less than the negative pressure conductance value, the piston moves under the action of the sealed chamber pressure and atmospheric pressure, respectively, to expose the first air outlet or the second air inlet. The elastic member can be used to enable the ventilation assembly to have a positive pressure conductance value and a negative pressure conductance value, and the positive pressure conductance value and the negative pressure conductance value can be changed by replacing the elastic member, which is flexible, convenient, and low-cost.

[0013] Furthermore, the invention further comprises a guide rod located in the cylinder body for guiding the movement of the piston. The arrangement of the guide rod can make the movement of the piston more stable and smooth.

[0014] Furthermore, there are two elastic members, one of which abuts against the two ends of the piston, and the other end of each elastic member abuts against the cylinder. The elastic member abuts against the piston and the cylinder without being connected, which simplifies assembly. In addition, the provision of two elastic members can reduce the elasticity requirements of a single elastic member, and the overall precision is also higher.

[0015] Furthermore, the ventilation assembly includes a mutually independent positive-pressure outlet valve and a negative-pressure inlet valve, each having a positive-pressure conductance value and a negative-pressure conductance value. Directly utilizing the mutually independent positive-pressure outlet valve and negative-pressure inlet valve to achieve the positive-pressure conductance value and the negative-pressure conductance value of the ventilation assembly is simple in structure, and the positive-pressure outlet valve and negative-pressure inlet valve are readily commercially available.

[0016] Furthermore, the lamp holder is provided with a heat dissipation cavity, in which a radiator for dissipating heat from the light source is located. The ventilation assembly selectively connects the sealed cavity with the heat dissipation cavity. This allows the heat dissipation cavity to shield the portion of the ventilation assembly exposed in the sealed cavity, protecting it from rainwater and debris while also enhancing its aesthetics.

[0017] Furthermore, a lens assembly for changing the divergence angle of the light beam and / or an effect assembly for intercepting the light beam to produce light effects are also provided in the sealed cavity, thereby making it possible to change the divergence angle of the light beam of the stage light and produce more diverse effects.

[0018] Furthermore, it also includes an arm supporting the rotation of the lamp head and a chassis supporting the rotation of the arm, so that the light of the lamp head can be projected in any direction. Beneficial effects

[0019] The self-breathing sealed stage light is provided with a ventilation component having a positive pressure conductance value and a negative pressure conductance value. When the pressure difference between the sealed cavity and the outside world is greater than the positive pressure conductance value (due to heating of the lamp during use or decrease in the outside air pressure) or less than the negative pressure conductance value (due to cooling of the lamp after discontinuation of use or increase in the outside air pressure), the ventilation component is turned on to connect the sealed cavity with the outside world for ventilation, thereby maintaining the pressure difference between the sealed cavity and the outside world within a reasonable range and preventing the lifespan of the sealing rubber ring and internal pressure-sensitive components of the lamp from being affected by the excessive pressure difference. When the pressure difference between the sealed cavity and the outside world is between the positive pressure conductance value and the negative pressure conductance value, the ventilation component is closed to maintain the sealing of the sealed cavity and prevent external water vapor from entering the sealed cavity and affecting the lighting effect or the lifespan of the electronic components. Moreover, when the ventilation component is turned on to connect the sealed cavity with the outside world for ventilation, only a small amount of gas needs to enter and exit the sealed cavity to achieve pressure balance inside and outside the sealed cavity, thereby reducing the ingress of water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the structure of the ventilation assembly and the sealed cavity of the present invention.

[0021] FIG2 is a schematic diagram of the explosion structure of the ventilation assembly of the present invention.

[0022] FIG3 is a schematic cross-sectional view of the assembled ventilation assembly of the present invention.

[0023] FIG4 is a schematic diagram of the coordination structure of another embodiment of the ventilation assembly of the present invention and the sealed cavity.

[0024] FIG5 is a schematic diagram of the exploded structure of the lamp holder of the present invention.

[0025] FIG6 is a schematic diagram of the overall structure of the self-breathing sealed stage lamp of the present invention.

[0026] In the picture:

[0027] 100. Lamp holder; 110. Sealed cavity; 111. Light source; 112. Light-emitting lens; 1131. Magnifying lens; 1132. Focusing lens; 1141. Cutting assembly; 1142. Rotating pattern disk assembly; 120. Heat dissipation cavity; 121. Radiator; 200. Ventilation assembly; 211. Cylinder body; 212. First air inlet; 213. Second air inlet; 214. First air outlet; 215. Second air outlet; 216. Piston; 217. Elastic member; 218. Guide rod; 219. Conduit; 221. Positive pressure outlet valve; 222. Negative pressure inlet valve; 230. Waterproof breathable valve; 240. Shielding valve; 300. Drying device; 400. Arm; 500. Chassis. Modes for Carrying Out the Invention

[0028] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0029] As shown in Figures 1 to 3, the present invention provides a self-breathing sealed stage lamp, including a lamp head 100 provided with a light source 111, a sealed cavity 110 formed in the lamp head 100, a light output lens 112 serving as part of the side wall of the sealed cavity 110, and light emitted by the light source 111 is emitted from the light output lens 112; the lamp head 100 is also provided with a ventilation component 200 for selectively connecting the sealed cavity 110 with the outside world, the ventilation component 200 having a positive pressure conduction value and a negative pressure conduction value, when the pressure difference between the sealed cavity 110 and the outside world is greater than the positive pressure conduction value or less than the negative pressure conduction value, the ventilation component 200 is connected to connect the sealed cavity 110 with the outside world, and when the pressure difference between the sealed cavity 110 and the outside world is between the positive pressure conduction value and the negative pressure conduction value, the ventilation component 200 is closed to maintain the sealing of the sealed cavity 110.

[0030] The self-breathing sealed stage lamp is provided with the ventilation component 200 having a positive pressure conduction value and a negative pressure conduction value. When the pressure difference between the sealed cavity 110 and the outside is greater than the positive pressure conduction value (the lamp is heated during use or the outside air pressure is reduced) or less than the negative pressure conduction value (the lamp is cooled after stopping use or the outside air pressure is increased), the ventilation component 200 is turned on to connect the sealed cavity 110 with the outside for ventilation, so as to maintain the pressure difference between the sealed cavity 110 and the outside within a reasonable range, thereby avoiding the pressure difference being too large and causing damage to the sealing rubber ring and internal pressure on the lamp. The service life of force-sensitive components is affected; when the pressure difference between the sealed cavity 110 and the outside is between the positive pressure conduction value and the negative pressure conduction value, the ventilation component 200 is closed to maintain the sealing of the sealed cavity 110, and prevent external water vapor from entering the sealed cavity 110, affecting the light effect or the life of electronic components; and when the ventilation component 200 is turned on to connect the sealed cavity 110 with the outside for ventilation, the sealed cavity 110 only needs to enter and exit a small amount of gas to achieve the balance of air pressure inside and outside the sealed cavity 110, and less water vapor enters.

[0031] It should be noted that the pressure difference between the sealed cavity 110 and the outside world refers to the air pressure inside the sealed cavity 110 minus the outside air pressure. When the air pressure inside the sealed cavity 110 is larger, the result is positive, and when the air pressure inside the sealed cavity 110 is smaller, the result is negative. In addition, the positive pressure conduction value of the ventilation component 200 is positive, and the negative pressure conduction value is negative.

[0032] Preferably, the ventilation component 200 is a purely mechanical structure, does not rely on electrical energy, has relatively few usage restrictions, and can still work normally when the stage light is not connected to electricity.

[0033] In a preferred embodiment of the present invention, the positive pressure conductance value is ≥300Pa, and / or the negative pressure conductance value is ≤-300Pa. In this way, the ventilation component 200 will not be frequently turned on, and frequent ventilation will cause excessive external water vapor to enter the sealing cavity. In good weather, the air pressure changes in the same area are very small, usually around a few hundred Pascals. In heavy rain or strong winds, the air pressure changes are more significant, and may reach a range of thousands of Pascals. Therefore, setting the positive pressure conductance value and / or the negative pressure conductance value in this range can ensure that when the stage light is not in daily use, the ventilation component 200 is always closed to maintain the sealing of the sealing cavity 110.

[0034] Preferably, the positive pressure conduction value is ≥ 500 Pa, and / or the negative pressure conduction value is ≤ -500 Pa. In this way, even in bad weather, the ventilation component 200 will not be easily turned on.

[0035] More preferably, the positive pressure conduction value is ≥ 1000 Pa, and / or the negative pressure conduction value is ≤ -1000 Pa. In this way, even if the lamp head 100 rotates rapidly, the ventilation component 200 will not be easily turned on.

[0036] More preferably, the positive pressure conductance value is ≥ 1500 Pa, and / or the negative pressure conductance value is ≤ -1500 Pa. In this way, the ventilation component 200 is usually only turned on when the lamp is heated up or when the lamp is cooled down after being stopped.

[0037] In a preferred embodiment of the present invention, the positive pressure conductance value is ≤ 6000 Pa, and / or the negative pressure conductance value is ≥ -6000 Pa. This prevents the ventilation assembly 200 from failing to conduct when there is a large pressure difference between the sealed cavity 110 and the outside world, thereby preventing the lifespan of the lamp's sealing rubber ring and internal pressure-sensitive components from being affected.

[0038] Preferably, the positive pressure conductance value is ≤5000 Pa, and / or the negative pressure conductance value is ≥-5000 Pa. Appropriately reducing the ventilation requirements can reduce the impact on the life of the sealing rubber ring and internal pressure-sensitive components.

[0039] More preferably, the positive pressure conductance value is ≤4000Pa, and / or the negative pressure conductance value is ≥-4000Pa.

[0040] More preferably, the positive pressure conductance value is ≤3000Pa, and / or the negative pressure conductance value is ≥-3000Pa.

[0041] As shown in Figures 2 and 3, in a preferred embodiment of the present invention, a drying device 300 is further included. When the pressure difference between the sealed cavity 110 and the outside is less than the negative pressure conduction value, the drying device 300 is used to dry the gas entering the sealed cavity 110. In this way, even if the outside air enters the sealed cavity 110, the water vapor will be absorbed by the drying device 300 and will not enter the sealed cavity 110.

[0042] Preferably, the drying device 300 is in the shape of a sealed cylinder with a desiccant filled therein. External air enters from one end of the drying device 300 and is output from the other end into the sealed cavity 110 after being dried.

[0043] In a preferred embodiment of the present invention, when the pressure difference between the sealed cavity 110 and the outside world is greater than the positive pressure conductance value, the gas discharged from the sealed cavity 110 also passes through the drying device 300. In this way, when the pressure difference between the sealed cavity 110 and the outside world is greater than the positive pressure conductance value due to the heat generated by the use of the lamp, the discharged hot air will dry the drying device 300, removing the water vapor previously absorbed by it, and realizing its recycling.

[0044] Preferably, the drying device 300 is in the shape of a sealed cylinder and is filled with desiccant. The gas entering the drying device 300 from the ventilation component 200 and the gas discharged from the drying device 300 to the ventilation component 200 enter and exit from the same end of the drying device 300, and the other end of the drying device 300 is connected to the sealed cavity 110.

[0045] In a preferred embodiment of the present invention, the ventilation assembly 200 further includes a waterproof breathable membrane for filtering water vapor in the gas entering the sealed cavity 110. The waterproof breathable membrane can prevent external water droplets from entering the sealed cavity 110, especially when ventilating in rainy and foggy weather.

[0046] Optionally, the waterproof breathable membrane can be installed at any location in the passage of the ventilation component 200 where external gas enters the sealed cavity 110, preferably at the inlet and outlet locations. The waterproof breathable membrane is a mature product and can be purchased directly from the market.

[0047] In a preferred embodiment of the present invention, the waterproof breathable membrane is fixed in the waterproof breathable valve 230, and the waterproof breathable valve 230 is connected to the air inlet of the ventilation component 200. Directly using the waterproof breathable valve 230 makes the installation of the waterproof breathable membrane more convenient.

[0048] As shown in Figures 2 and 3, in a preferred embodiment of the present invention, the ventilation component 200 includes a cylinder 211, a piston 216 located in the cylinder 211, and an elastic member 217 for resetting the piston 216. The cylinder 211 has a first air inlet 212 and a first air outlet 214 communicating with the outside world, and a second air inlet 213 and a second air outlet 215 connected to the sealed cavity 110. The first air inlet 212, the second air inlet 213, the first air outlet 214, and the second air outlet 215 are arranged in sequence. When the pressure difference between the sealed chamber 110 and the outside world is between the positive pressure conductance value and the negative pressure conductance value, the elastic member 217 maintains the piston 216 while simultaneously blocking the second air inlet 213 and the first air outlet 214, while exposing the first air inlet 212 and the second air outlet 215. When the pressure difference between the sealed chamber 110 and the outside world is greater than the positive pressure conductance value or less than the negative pressure conductance value, the piston 216 moves under the influence of the sealed chamber 110 pressure and the atmospheric pressure, respectively, to expose the first air outlet 214 or the second air inlet 213. The elastic member 217 enables the ventilation assembly 200 to have both positive and negative pressure conductance values, and the positive and negative pressure conductance values ​​can be changed by replacing the elastic member 217, which is flexible, convenient, and low-cost.

[0049] In this embodiment, the second air inlet 213 and the second air outlet 215 are in communication with the sealed cavity 110 via a conduit 219 .

[0050] Optionally, the first air inlet 212 and the first air outlet 214 can be connected to the outside world as a whole, and the second air inlet 213 and the second air outlet 215 can be connected to the sealed cavity 110 as a whole.

[0051] When the waterproof breathable membrane is fixed in the waterproof breathable valve 230 , the waterproof breathable valve 230 is connected to the air inlet of the ventilation component 200 , which can be connected to the first air inlet 212 or the second air inlet 213 , preferably connected to the first air inlet 212 .

[0052] In this embodiment, the first air outlet 214 is provided with a shielding valve 240 to prevent foreign matter and dust from entering the cylinder body 211 .

[0053] In a preferred embodiment of the present invention, a guide rod 218 is further included in the cylinder body 211 for guiding the movement of the piston 216. The provision of the guide rod 218 can make the movement of the piston 216 more stable and smooth.

[0054] In this embodiment, the piston 216 is cylindrical and is movably sleeved on the guide rod 218 and is in close contact with the guide rod 218 .

[0055] In a preferred embodiment of the present invention, there are two elastic members 217, one of which abuts against both ends of the piston 216, while the other ends of the elastic members 217 abut against the cylinder 211. The elastic members 217 abut against the piston 216 and the cylinder 211 without being connected, which simplifies assembly. In addition, the provision of two elastic members 217 can reduce the elasticity requirements of a single elastic member 217, and the overall precision is also improved.

[0056] As shown in Figure 4 , in a preferred embodiment of the present invention, the ventilation assembly 200 includes a mutually independent positive pressure outlet valve 221 and a negative pressure inlet valve 222, each of which has a positive pressure conductance value and a negative pressure conductance value. Directly utilizing the mutually independent positive pressure outlet valve 221 and negative pressure inlet valve 222 to achieve the positive and negative pressure conductance values ​​of the ventilation assembly 200, the structure is simple, and the positive pressure outlet valve 221 and negative pressure inlet valve 222 are readily commercially available.

[0057] As shown in Figures 1 and 4 , in a preferred embodiment of the present invention, a heat dissipation cavity 120 is further provided within the lamp holder 100. A heat sink 121 for dissipating heat from the light source 111 is located within the heat dissipation cavity 120. The ventilation assembly 200 selectively connects the sealed cavity 110 with the heat dissipation cavity 120. This allows the heat dissipation cavity 120 to shield the portion of the ventilation assembly 200 exposed from the sealed cavity 110, thereby protecting the lamp from rain and debris and enhancing the appearance of the lamp.

[0058] In this embodiment, the sidewall of the heat dissipation cavity 120 has a plurality of strip-shaped air holes.

[0059] As shown in Figure 5, in a preferred embodiment of the present invention, a lens assembly for changing the divergence angle of the light beam and / or an effect assembly for intercepting the light beam to produce light effects are further disposed within the sealed cavity 110. This allows the light beam of the stage light to change its divergence angle and produce more diverse effects.

[0060] In this embodiment, the lens assembly is a magnifying lens 1131 or a focusing lens 1132; the effect group includes at least one of a CMY assembly, a cutting assembly 1141, a rotating pattern wheel assembly 1142, a fixed pattern wheel assembly, and a color plate assembly, respectively realizing the functions of light beam color adjustment, light beam cutting, pattern rotation, specific pattern, and light beam coloring.

[0061] As shown in FIG6 , in a preferred embodiment of the present invention, an arm 400 for supporting the rotation of the lamp head 100 and a chassis 500 for supporting the rotation of the arm 400 are further included, so that the light of the lamp head 100 can be projected in any direction.

[0062] The above-described novel embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to provide an exhaustive list of all embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the claims.

Claims

1. A self-breathing sealed stage light, characterized in that, It includes a lamp head (100) provided with a light source (111). A sealing cavity (110) is formed in the lamp head (100). The light-emitting lens (112) is part of the side wall of the sealing cavity (110). The light emitted by the light source (111) is emitted from the light-emitting lens (112). The lamp head (100) is further provided with a ventilation component (200) that selectively communicates the sealing cavity (110) with the outside. The ventilation component (200) has a positive pressure conduction value and a negative pressure conduction value. When the pressure difference between the sealing cavity (110) and the outside is greater than the positive pressure conduction value or less than the negative pressure conduction value, the ventilation component (200) conducts to communicate the sealing cavity (110) with the outside. When the pressure difference between the sealing cavity (110) and the outside is between the positive pressure conduction value and the negative pressure conduction value, the ventilation component (200) closes to maintain the sealing of the sealing cavity (110).

2. The self-breathing sealed stage light according to claim 1, wherein The positive pressure conduction value ≥ 300 Pa, and / or the negative pressure conduction value ≤ -300 Pa.

3. The self-breathing sealed stage light according to claim 1, characterized in that, The positive pressure conduction value ≤ 6000 Pa, and / or the negative pressure conduction value ≥ -6000 Pa.

4. The self-breathing sealed stage light according to claim 1, characterized in that It further includes a drying device (300) for drying the gas entering the sealing cavity (110) when the pressure difference between the sealing cavity (110) and the outside is less than the negative pressure conduction value.

5. The self-breathing sealed stage light according to claim 4, characterized in that, When the pressure difference between the sealing cavity (110) and the outside is greater than the positive pressure conduction value, the gas discharged from the sealing cavity (110) also passes through the drying device (300).

6. The self-breathing sealed stage light according to claim 1, characterized in that, The ventilation component (200) further includes a waterproof breathable membrane for filtering the water vapor in the gas entering the sealing cavity (110).

7. The self-breathing sealed stage light according to claim 6, wherein, The waterproof breathable membrane is fixed in a waterproof breathable valve (230), and the waterproof breathable valve (230) is communicated with the air inlet of the ventilation component (200).

8. The self-breathing sealed stage light according to claim 1, wherein The ventilation component (200) includes a cylinder block (211), a piston (216) located in the cylinder block (211), and an elastic member (217) for resetting the piston (216). The cylinder block (211) has a first air inlet (212) and a first air outlet (214) communicated with the outside, and a second air inlet (213) and a second air outlet (215) connected to the sealing cavity (110). The first air inlet (212), the second air inlet (213), the first air outlet (214), and the second air outlet (215) are arranged in sequence. When the pressure difference between the sealing cavity (110) and the outside is between the positive pressure conduction value and the negative pressure conduction value, the elastic member (217) maintains the piston (216) to block the second air inlet (213) and the first air outlet (214) simultaneously while exposing the first air inlet (212) and the second air outlet (215). When the pressure difference between the sealing cavity (110) and the outside is greater than the positive pressure conduction value or less than the negative pressure conduction value, the piston (216) moves under the action of the pressure in the sealing cavity (110) and the atmospheric pressure to expose the first air outlet (214) or the second air inlet (213) respectively.

9. The self-breathing sealed stage light according to claim 8, wherein, It further includes a guide rod (218) located within the cylinder block (211) for guiding the movement of the piston (216).

10. The self-breathing sealed stage light according to claim 8, characterized in that, There are two elastic members (217), which respectively abut against both ends of the piston (216), and the other ends of the elastic members (217) respectively abut against the cylinder block (211).

11. The self-breathing sealed stage light according to claim 1, characterized in that, The ventilation assembly (200) includes an independent positive-pressure air outlet valve (221) and a negative-pressure air inlet valve (222), and the positive-pressure air outlet valve (221) and the negative-pressure air inlet valve (222) respectively have a positive-pressure conduction value and a negative-pressure conduction value.

12. The self-breathing sealed stage light according to claim 1, wherein, A heat dissipation cavity (120) is further provided within the lamp cap (100), a radiator (121) for dissipating heat from the light source (111) is located within the heat dissipation cavity (120), and the ventilation assembly (200) selectively communicates the sealed cavity (110) with the heat dissipation cavity (120).

13. The self-breathing sealed stage light according to claim 1, characterized in that, A lens assembly for changing the beam divergence angle and / or an effect assembly for intercepting the beam to generate a light effect are further provided within the sealed cavity (110).

14. The self-breathing sealed stage light according to claim 1, wherein It further includes an arm (400) for supporting the rotation of the lamp cap (100) and a chassis (500) for supporting the rotation of the arm (400).

Images