Projection device and vehicle

Abstract

Projection device, characterized in that the device has the following components: a housing (10) wherein the side wall of the housing (10) has a cable passage hole (13), an optical assembly, wherein the optical assembly is arranged on the housing (10), a cable (30), wherein the cable (30) is connected to the optical assembly, wherein the cable (30) extends partially through the cable passage hole (13) to the outside of the housing (10), wherein a sealing sleeve (31) is arranged on the outer circumference of the cable (30), wherein the sealing sleeve (31) is embedded in the cable passage hole (13) to seal the gap between the cable (30) and the cable passage hole (13).

Description

Technical area

[0001] The present utility model relates to the technical field of projection, in particular to a projection device and a vehicle. State of the art

[0002] With the intelligent development of automobiles, the functions of vehicle systems have gradually become richer and there are more and more entertainment functions, which enables the application of projection devices in automobiles.

[0003] Due to the complex working conditions of automobiles, the waterproof and dustproof requirements of projection devices are very high. It must be highly reliable, especially when the projection device is exposed to sunlight and rain, car washing, wading, etc. In addition, large amounts of dust and fine ash layers generated on the road surface during driving easily enter the projector, affecting the performance of the projection device.

[0004] Therefore, it is urgent to improve the structure of the projection device so that the waterproof and dustproof performance is improved. Contents of this utility model

[0005] The present utility model provides a projection device and a vehicle such that the waterproof and dustproof performance of the projection device is improved.

[0006] To achieve the above-mentioned purposes, the present utility model provides a projection device comprising the following components: a housing, the side wall of the housing having a cable through-hole, an optical assembly, wherein the optical assembly is arranged on the housing, a cable, the cable being connected to the optical assembly, the cable extending partially through the cable through-bore to the outside of the housing, a sealing sleeve being arranged on the outer circumference of the cable, the sealing sleeve being embedded in the cable through-bore to seal the gap between the cable and the cable through-bore.

[0007] In the projection device according to the present utility model, a sealing sleeve is arranged on the outer circumference of the cable. The gap between the cable and the cable through-hole is sealed by the sealing sleeve, thus improving the sealing effect. This can effectively prevent dust and water droplets from entering the interior of the housing, thus preventing failure of the projection device due to the influence of dust and water droplets, thereby improving the service life of the projection device.

[0008] In one possible embodiment, one end of the cable extending outwards from the housing is connected to a waterproof joint.

[0009] In one possible embodiment, it is provided that the optical assembly comprises a digital micromirror device, wherein the side wall of the housing has a first receiving cavity, wherein the digital micromirror device is arranged within the first receiving cavity, wherein a first sealing ring is arranged between the digital micromirror device and the opening of the first receiving cavity.

[0010] In one possible embodiment, it is provided that the optical assembly further comprises a color wheel unit, wherein the side wall of the housing further comprises a second receiving cavity, wherein the second receiving cavity and the first receiving cavity are each arranged on opposite sides of the housing, wherein the color wheel unit is arranged within the second receiving cavity, wherein a second sealing ring is arranged between the color wheel unit and the opening of the second receiving cavity.

[0011] In one possible embodiment, it is provided that the optical assembly further comprises a light source device, wherein the side wall of the housing further comprises a third receiving cavity, wherein the light source device is arranged within the third receiving cavity, wherein a third sealing ring is arranged between the light source device and the opening of the third receiving cavity.

[0012] In one possible embodiment, it is provided that the optical assembly further comprises a lens, wherein the lens is arranged within the first receiving cavity.

[0013] In one possible embodiment, further comprising a control assembly, it is provided that the side wall of the housing further comprises a fourth receiving cavity, wherein the fourth receiving cavity and the third receiving cavity are each arranged on opposite sides of the housing, wherein the control assembly is arranged within the fourth receiving cavity, wherein the opening of the fourth receiving cavity is provided with a cover plate, wherein a fourth sealing ring is arranged between the opening of the fourth receiving cavity and the cover plate.

[0014] In one possible embodiment, further comprising a first plug-in piece, it is provided that the side wall of the housing further comprises a first installation bore, wherein the first plug-in piece is arranged in the first installation bore, wherein a fifth sealing ring is arranged between the first plug-in piece and the opening of the first installation bore, and / or, further comprising a second plug-in piece, wherein the third receiving cavity has a connecting bore, wherein the second plug-in piece is arranged in the connecting bore, wherein a sixth sealing ring is arranged on the inner wall of the second plug-in piece and the connecting bore.

[0015] In one possible embodiment, it is provided that the upper side of the housing has a detection bore, wherein the detection bore is connected to the first receiving cavity, the second receiving cavity, the third receiving cavity and the fourth receiving cavity, wherein a sealing plug is detachably arranged within the detection bore.

[0016] The present utility model further provides a vehicle having a vehicle body and a projection device as above, wherein the projection device is arranged on the outer wall surface of the vehicle body.

[0017] The sealing performance reaches the IP67 level, so the projection device according to the present utility model can be used under the condition that the vehicle system is installed externally to meet the vibration, high temperature, waterproof, dustproof and weather resistance tests of the vehicle conditions.

[0018] In addition to the technical problems solved in the above-described embodiments of the present utility model, the technical features constituting the technical solutions, and the advantageous effects brought about by the technical features of these technical solutions, other technical problems that can be solved by a projection apparatus and a vehicle according to the embodiments of the present utility model, other technical features included in the technical solutions, and the advantageous effects brought about by these technical features will be further explained in detail in the specific embodiments. Short description of the drawing

[0019] In order to more clearly explain the embodiments of the present utility model or the technical solutions in the prior art, the drawings that must be used in describing the embodiments or the prior art are briefly presented below. It is obvious that the drawings in the following description represent some embodiments of the present utility model. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. Fig. 1 is a schematic diagram of the three-dimensional structure of a projection apparatus according to an embodiment of the present utility model; Fig. 2 is a plan view of a projection apparatus according to an embodiment of the present invention; Fig. 3 is a partial sectional view of the AA section of Fig. 2; Fig. 4 is a schematic diagram showing the structure of a cable of a projection apparatus according to an embodiment of the present invention; Fig. 5 is an exploded view of the partial structure of a projection apparatus according to an embodiment of the present utility model; Fig. 6 is an exploded view of the other partial structure of a projection apparatus according to an embodiment of the present utility model; Fig. 7 is an exploded view of another partial structure of a projection apparatus according to an embodiment of the present utility model; Fig. 8 is a schematic diagram of the structure of a first connector of a projection device according to an embodiment of the present utility model; Fig. 9 is a schematic diagram of the structure of a second connector of a projection device according to an embodiment of the present utility model; Fig. 10 is a partial sectional view of the BB section of Fig. 2; Fig. 11 is a partial sectional view of the CC section of Fig. 2. Reference symbol: 10 housings; 11 First receiving cavity; 12 Second receiving cavity; 13 cable through hole; 14 Third receiving cavity; 141 connecting hole; 15 Fourth receiving cavity; 16 cover plate; 17 First installation hole; 18 connecting seat; 19 detection borehole; 191 sealing plugs; 21 Digital micromirror device; 22 color wheel unit; 23 light source device; 231 heat dissipation fin; 24 lens; 30 cables; 31 sealing sleeve; 32 Waterproof joint; 40 control module; 51 First sealing ring; 52 Second sealing ring; 53 Third sealing ring; 54 Fourth sealing ring; 55 Fifth sealing ring; 56 Sixth sealing ring; 60 First plug-in piece; 70 Second plug-in piece; 80 lens; 81 lens protection cap; 90 fastener. Detailed embodiments

[0020] To clarify the purpose, technical solutions, and advantages of the present utility model, the technical solutions in the present utility model are described clearly and comprehensively below in conjunction with the drawings in the present utility model. It should be understood that the described embodiments are only a portion of the embodiments of the present utility model and not all of them. Based on the embodiments in the present utility model, all other embodiments obtained by a person skilled in the art without creative effort fall within the scope of the present utility model.

[0021] A projection device is a device used to project images. With prolonged use or in harsh environments, dust adheres, which not only reduces brightness but also affects its service life. This is especially true for vehicle-mounted projection devices used outside vehicles and in harsh working environments. Therefore, sealing requirements are higher, so it is important to prevent dust and water droplets from entering the projection device to ensure its service life.

[0022] With this in mind, in the projection device according to the present utility model, a sealing sleeve is arranged on the outer periphery of the cable. The gap between the cable and the cable through-hole is sealed by the sealing sleeve, thus improving the sealing effect. This can effectively prevent dust and water droplets from entering the interior of the housing, thus preventing failure of the projection device due to the influence of dust and water droplets, thereby improving the service life of the projection device.

[0023] Hereinafter, a projection apparatus and a vehicle according to embodiments of the present utility model will be described with reference to the drawings.

[0024] The present utility model provides a projection device comprising the following components: a housing 10, an optical assembly and a cable 30, wherein the side wall of the housing 10 has a cable through-hole 13, wherein the optical assembly is arranged on the housing 10, with reference to Fig. 1, wherein the cable 30 is connected to the optical assembly, wherein the cable 30 extends partially through the cable through-hole 13 to the outside of the housing 10, wherein a sealing sleeve 31 is arranged on the outer circumference of the cable 30, wherein the sealing sleeve 31 is embedded in the cable through-hole 13 to seal the gap between the cable 30 and the cable through-hole 13, with reference to Fig. 2, Fig. 3 and Fig. 4.

[0025] In the projection device according to the present invention, a sealing sleeve 31 is arranged on the outer periphery of the cable 30. The gap between the cable 30 and the cable through-hole 13 is sealed by the sealing sleeve 31, thus improving the sealing effect. This can effectively prevent dust and water droplets from entering the interior of the housing 10, thus preventing failure of the projection device due to the influence of dust and water droplets, thereby improving the service life of the projection device.

[0026] In one possible embodiment, the cable through-hole 13 can be a circular or oval hole, with the outer circumference of the sealing sleeve 31 matching the shape of the cable through-hole 13 to improve the sealing effect. The sealing sleeve 31 can be made of rubber or silicone so that it can be elastically deformed upon compression, thereby sealing the gap between the outer circumference of the cable 30 and the cable through-hole 13.

[0027] In a possible embodiment, it is provided that one end of the cable 30 extending outwardly of the housing 10 is connected to a waterproof joint 32 in order to improve the waterproof effect of the connection of the cable 30, with reference to Fig. 1. The various components used to form the optical assembly can be interconnected via cables 30 to enable signal transmission. This waterproof joint 32 facilitates the connection between the two cables 30.

[0028] In one possible embodiment, it is provided that the optical assembly comprises a digital micromirror device 21, wherein the side wall of the housing 10 comprises a first receiving cavity 11, wherein the digital micromirror device 21 is arranged within the first receiving cavity 11, wherein a first sealing ring 51 is arranged between the digital micromirror device 21 and the opening of the first receiving cavity 11, with reference to Fig. 5.

[0029] The digital micromirror device comprises a digital micromirror chip (Digital Micromirror Device, or DMD for short). The digital micromirror device 21 is a core component of the projection device. The stability of the digital micromirror device 21 is crucial for the projection effect of the projection device, with the DMD serving to process projection light sources.

[0030] The first sealing ring 51 includes, but is not limited to, rubber or silicone material, so that not only the waterproof and dustproof effect between the digital micro-mirror device 21 and the first receiving cavity 11 can be improved, but also the shock and vibration on the digital micro-mirror device 21 can be mitigated, which contributes to improving the anti-vibration effect of the digital micro-mirror device 21.

[0031] The digital micromirror device 21 can be connected to the first receiving cavity 11 by fastening elements 90 such as screws, bolts, or the like. To improve watertightness, a sealing washer is coated on the outer periphery of the fastening element 90 to prevent water droplets or dust from penetrating from the fastening hole of the fastening element 90, thereby improving the sealing watertightness.

[0032] In a possible embodiment, it is provided that the optical assembly further comprises a color wheel unit 22, wherein the side wall of the housing 10) further comprises a second receiving cavity 12, wherein the second receiving cavity 12 and the first receiving cavity 11 are each arranged on opposite sides of the housing 10, wherein the color wheel unit 22 is arranged within the second receiving cavity 12, wherein a second sealing ring 52 is arranged between the color wheel unit 22 and the opening of the second receiving cavity 12, with reference to Fig. 5.

[0033] The second sealing ring 52 includes, but is not limited to, rubber or silicone material, so that not only the waterproof and dustproof effect between the color wheel unit 22 and the second receiving cavity 12 can be improved, but also the shock and vibration on the color wheel unit 22 can be mitigated, which contributes to improving the anti-vibration effect of the color wheel unit 22.

[0034] In one possible embodiment, it is contemplated that the second sealing ring 52 may be a one-piece structure encased on the outer periphery of the color wheel unit 22, which facilitates the implementation of a sealed installation of the color wheel unit 22.

[0035] The color wheel unit 22 can be connected to the third receiving cavity 14 by fastening elements 90 such as screws, bolts, or the like. To improve watertightness, a sealing washer is coated on the outer periphery of the fastening element 90 to prevent water droplets or dust from penetrating from the fastening hole of the fastening element 90, thereby improving the sealing watertightness. Of course, the color wheel unit 22 can also be connected within the third receiving cavity 14 with a snap-in fastener.

[0036] In a possible embodiment, it is provided that the optical assembly further comprises a light source device 23, wherein the side wall of the housing 10 further comprises a third receiving cavity 14, wherein the light source device 23 is arranged within the third receiving cavity 14, wherein a third sealing ring 53 is arranged between the light source device 23 and the opening of the third receiving cavity 14, with reference to Fig. 5 and Fig. 6.

[0037] In one possible embodiment, the light source device 23 comprises, but is not limited to, a laser and an LED lamp. If the light source device 23 is a laser, the light source is a laser, so that the brightness attenuation can be reduced, resulting in high brightness, good color, and power savings.

[0038] If the light source device 23 is an LED lamp, it has the advantage of strong stability and low cost.

[0039] The third sealing ring 53 includes, but is not limited to, rubber or silicone material, so that not only the waterproof and dustproof effect between the light source device 23 and the third receiving cavity 14 can be improved, but also the shock and vibration on the light source device 23 can be mitigated, which contributes to improving the anti-vibration effect of the light source device 23.

[0040] On the side of the light source device 23 facing away from the third receiving cavity 14, a plurality of heat dissipation fins 231 are arranged so that the heat dissipation area can be enlarged by the heat dissipation fins 231. The heat dissipation fins 231 serve to dissipate heat from the light source device 23 to prevent the temperature of the light source device 23 from becoming too high.

[0041] The light source device 23 can be connected to the third receiving cavity 14 by fastening elements 90 such as screws, bolts, or the like. To improve watertightness, a sealing washer is coated on the outer periphery of the fastening element 90 to prevent water droplets or dust from penetrating from the fastening hole of the fastening element 90, thereby improving the sealing watertightness.

[0042] In one possible embodiment, it is provided that the optical assembly further comprises a lens 24, wherein the lens 24 is arranged within the first receiving cavity 11, with reference to Fig. 5.

[0043] Projection device according to the present utility model, further comprising a lens 80 and a lens protection cover 81, wherein the lens protection cover 81 can be used for better protection of the lens 24, with reference to Fig. 5.

[0044] In a possible embodiment, it is provided that the projection device further comprises a control assembly 40, wherein the side wall of the housing 10 further comprises a fourth receiving cavity 15, wherein the fourth receiving cavity 15 and the third receiving cavity 14 are each arranged on opposite sides of the housing 10, wherein the control assembly 40 is arranged within the fourth receiving cavity 15, wherein the opening of the fourth receiving cavity 15 is provided with a cover plate 16, wherein a fourth sealing ring 54 is arranged between the opening of the fourth receiving cavity 15 and the cover plate 16, with reference to Fig. 6 and Fig. 7.

[0045] The control assembly 40 includes a control board, with reference to Fig. 7 and Fig. 10. The control assembly 40 can be connected to the fourth receiving cavity 15 by fastening elements 90 such as screws, bolts, or the like, so that the cover plate 16 is in turn fastened to the opening position of the fourth receiving cavity 15 by fastening elements 90 such as screws, bolts, or the like. Of course, the cover plate 16 can also be fastened in the opening position of the fourth receiving cavity 15 by means of a snap-lock connection.

[0046] The control board may be electrically connected to various components to form the optical assembly, thereby enabling the task of driving the optical assembly.

[0047] The fourth sealing ring 54 includes, but is not limited to, rubber or silicone material, so that the waterproof and dustproof effect between the opening of the fourth receiving cavity 15 and the cover plate 16 can be improved. This effectively prevents the control assembly 40 from coming into contact with dust and water droplets in the external environment, ensuring the normal operation of the control assembly 40.

[0048] In a possible embodiment, it is provided that the projection device further comprises a first plug-in piece 60, wherein the side wall of the housing 10 further comprises a first installation bore 17, wherein the first plug-in piece 60 is arranged in the first installation bore 17, wherein a fifth sealing ring 55 is arranged between the first plug-in piece 60 and the opening of the first installation bore 17, with reference to Fig. 6, Fig. 8 and Fig. 9. The sealing performance between the first plug 60 and the first installation hole 17 is improved by the fifth sealing ring 55, so that dust and contaminants are prevented from entering the interior of the projection device through the first installation hole 17.

[0049] The fifth sealing ring 55 comprises, but is not limited to, rubber or silicone material. The fifth sealing ring 55 can be coated on the outer peripheral surface of the first plug-in piece 60.

[0050] In the present example, the first connector 60 can be a power supply terminal, where the first connector 60 serves to connect an external power supply. The position of the first connector 60 can be flexibly arranged depending on the application requirements.

[0051] In one possible embodiment, the projection device further comprises a second plug-in piece 70, wherein the third receiving cavity 14 has a connecting bore 141, wherein the second plug-in piece 70 is arranged in the connecting bore 141, wherein a sixth sealing ring 56 is arranged on the inner wall of the second plug-in piece 70 and the connecting bore 141. The sealing performance between the second plug-in piece 70 and the connecting bore 141 is improved by the sixth sealing ring 56, thus preventing dust and contaminants from entering the interior of the projection device through the connecting bore 141.

[0052] The sixth sealing ring 56 comprises, but is not limited to, rubber or silicone material. The sixth sealing ring 56 can be coated on the outer peripheral surface of the second plug-in piece 70.

[0053] The second connector 70 may be a plug-in terminal that can be used to plug in a data storage device. For example, the second connector 70 may be a USB interface used to access a USB flash drive (i.e., a USB drive) as a data storage device to realize communication, and may also be connected to an OBD interface of the vehicle.

[0054] The second plug-in piece 70 can be secured in the connecting hole 141 with a snap-in lock. The number and position of the second plug-in pieces 70 can be flexibly arranged depending on the application requirements.

[0055] In one possible embodiment, it is provided that the top side of the housing 10 has a detection bore 19, wherein the detection bore 19 is connected to the first receiving cavity 11, the second receiving cavity 12, the third receiving cavity 14 and the fourth receiving cavity 15, respectively, with reference to Fig. 2, Fig. 5 and Fig. 6.

[0056] The detection hole 19 is used to connect the air supply device, so that the blowing of air through the air supply device into the interior of the housing 10 is facilitated through this detection hole 19, thereby performing airtightness detection by positive pressure inflation. During the production process, airtightness can be determined using air pressure to ensure the sealing performance of the projection device, which meets the strict working conditions of the vehicle.

[0057] After the airtightness detection is completed, the detection hole 19 is plugged, with reference to Fig. 2 and Fig. 11. A sealing plug 191, for example, can be inserted within the detection bore 19. The sealing plug 191 can be, for example, an elastic plug or a sealing screw, so that the detection bore 19 is blocked by the sealing plug 191.

[0058] In a possible embodiment, it is provided that the bottom of the housing 10 has a connecting seat 18, which connecting seat 18 can be used to realize the installation and fixing of the projection device, so that the effect of a rigid support of the projection device will play, with reference to Fig. 1.

[0059] In one possible embodiment, it is contemplated that the housing 10 may be an integrally cast monolithic structure, such as an integrated die-cast aluminum shell, which not only has high strength but also low weight.

[0060] The present utility model further provides a vehicle having a vehicle body and a projection device as above, wherein the projection device is arranged on the outer wall surface of the vehicle body.

[0061] In one possible embodiment, it is provided that the projection device is arranged near the front bumper of the vehicle body so that a projection can be carried out towards the outside of the vehicle in order to increase the entertainment function of the vehicle.

[0062] Operating principle of a projection device according to the present utility model: The light rays emitted by the light source device 23 as the projection light source pass through the color wheel unit 22. The white light is color-separated by the color wheel unit 22 to sequentially separate the three RGB primary colors. The separated, distinct monochromatic light impinges on the digital micromirror device 21. Upon receiving the control signal from the control module 40, the monochromatic light is synthesized by the digital micromirror device 21 and projected onto the projection screen through the lens 24, thereby projecting a full-color image.

[0063] The sealing performance reaches the IP67 level, so the projection device according to the present utility model can be used under the condition that the vehicle system is installed externally to meet the vibration, high temperature, waterproof, dustproof and weather resistance tests of the vehicle conditions.

[0064] When describing the present utility model, it should be understood that the orientation or positional relationships indicated by the terms center, length, width, thickness, upper end, lower end, top, bottom, left, right, front, rear, vertical, horizontal, inside, outside, axial, circumferential, etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, without indicating or implying that the designated position or original must have a specific orientation and be specially constructed and operated, and therefore cannot be understood as limiting the present utility model.

[0065] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood to indicate or imply a relative importance or to imply the number of specified technical features. A feature defined as "first" and "second" may explicitly or implicitly encompass one or more of these features. In describing the present utility model, "several" means at least two, for example, two, three, or the like, unless expressly and specifically defined otherwise.

[0066] In the present utility model, the terms "installing," "connecting," "connecting," and "fixing," etc., shall be broadly understood unless expressly specified and limited otherwise. For example, it may be a fixed connection, a detachable connection, or a one-piece connection; it may be a mechanical connection, an electrical connection, or mutual communication; it may be connected directly or indirectly through an intermediate medium, so that the internal connection of the two elements or the interaction of the two elements can be realized. Those skilled in the art can understand the specific meaning of the above terms in the present utility model according to specific circumstances.

[0067] In the present utility model, the first feature above or below the second feature, unless expressly stated and defined otherwise, may also include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are separated by other features. The first feature above the second feature includes the first feature directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature below the second feature includes the first feature directly below and diagonally below the second feature, or simply means that the first feature is horizontally smaller than the second feature.

[0068] Finally, it should be noted that the above embodiments are only illustrative of the technical solutions of the present utility model and are not limiting. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced with equivalents. These modifications or replacements do not deviate the essence of the respective technical solutions from the scope of the technical solutions of each embodiment of the present utility model.

Claims

[1] Projection device, characterized by that the device has the following components: a housing (10), the side wall of the housing (10) having a cable through-hole (13), an optical assembly, wherein the optical assembly is arranged on the housing (10), a cable (30), the cable (30) being connected to the optical assembly, the cable (30) extending partially through the cable through-bore (13) to the outside of the housing (10), a sealing sleeve (31) being arranged on the outer circumference of the cable (30), the sealing sleeve (31) being embedded in the cable through-bore (13) to seal the gap between the cable (30) and the cable through-bore (13). [2] Projection device according to claim 1, characterized by that one end of the cable (30) extending outwards of the housing (10) is connected to a waterproof joint (32). [3] Projection device according to claim 1, characterized by in that the optical assembly comprises a digital micromirror device (21), wherein the side wall of the housing (10) has a first receiving cavity (11), wherein the digital micromirror device (21) is arranged within the first receiving cavity (11), wherein a first sealing ring (51) is arranged between the digital micromirror device (21) and the opening of the first receiving cavity (11). [4] Projection device according to claim 3, characterized byin that the optical assembly further comprises a color wheel unit (22), wherein the side wall of the housing (10) further comprises a second receiving cavity (12), wherein the second receiving cavity (12) and the first receiving cavity (11) are each arranged on opposite sides of the housing (10), wherein the color wheel unit (22) is arranged within the second receiving cavity (12), wherein a second sealing ring (52) is arranged between the color wheel unit (22) and the opening of the second receiving cavity (12). [5] Projection device according to claim 3, characterized byin that the optical assembly further comprises a light source device (23), wherein the side wall of the housing (10) further comprises a third receiving cavity (14), wherein the light source device (23) is arranged within the third receiving cavity (14), wherein a third sealing ring (53) is arranged between the light source device (23) and the opening of the third receiving cavity (14). [6] Projection device according to claim 3, characterized by that the optical assembly further comprises a lens (24), wherein the lens (24) is arranged within the first receiving cavity (11). [7] Projection device according to claim 5, further comprising a control assembly (40), characterized byin that the side wall of the housing (10) further comprises a fourth receiving cavity (15), wherein the fourth receiving cavity (15) and the third receiving cavity (14) are each arranged on opposite sides of the housing (10), wherein the control assembly (40) is arranged within the fourth receiving cavity (15), wherein the opening of the fourth receiving cavity (15) is provided with a cover plate (16), wherein a fourth sealing ring (54) is arranged between the opening of the fourth receiving cavity (15) and the cover plate (16). [8] Projection device according to claim 7, further comprising a first plug-in piece (60), characterized by that the side wall of the housing (10) further comprises a first installation bore (17), wherein the first plug-in piece (60) is arranged in the first installation bore (17), wherein a fifth sealing ring (55) is arranged between the first plug-in piece (60) and the opening of the first installation bore (17), and / or, further comprising a second plug-in piece (70), wherein the third receiving cavity (14) has a connecting bore (141), wherein the second plug-in piece (70) is arranged in the connecting bore (141), wherein a sixth sealing ring (56) is arranged on the inner wall of the second plug-in piece (70) and the connecting bore (141). [9] Projection device according to claim 7, characterized by in that the top side of the housing (10) has a detection bore (19), wherein the detection bore (19) is connected to the first receiving cavity (11), the second receiving cavity (12), the third receiving cavity (14) and the fourth receiving cavity (15), wherein a sealing plug (191) is detachably arranged within the detection bore (19). [10] Vehicle with a vehicle body and a projection device according to one of claims 1 to 9, characterized by that the projection device is arranged on the outer wall surface of the vehicle body.

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