A projection device

Abstract

This application relates to the field of projection and discloses a projection device, including a housing and a main structure. The housing includes an annular shell; the annular shell includes an annular metal shell and an annular non-metallic shell, with the annular non-metallic shell attached to the inner wall of the annular metal shell; the main structure is fixed inside the annular shell; the annular metal shell surrounds the outer side of the main structure from the front end to the rear end; the main structure includes a metal bracket electrically connected to the annular metal shell. The projection device provided in this application adopts a combined design of annular metal shell and annular non-metallic shell, which improves the structural stability of the entire housing and better protects the internal main structure; by using non-metallic materials, the weight of the device can be reduced while ensuring structural strength, making it easier to carry and install. The electrical connection design between the metal bracket and the annular metal shell can effectively reduce electromagnetic interference, improve the electromagnetic compatibility of the device, and ensure normal operation in complex electromagnetic environments.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a projection device. Background Technology

[0002] With the advancement of technology, projection equipment has become increasingly common in people's lives, and aesthetics are increasingly valued alongside practical performance. Currently, projection equipment typically uses metal casings to ensure both a metallic feel and structural strength. However, metal casings have a significant impact on the electromagnetic compatibility (EMC) of the entire device, generating electromagnetic radiation for people, the public power grid, and other normally functioning electrical equipment in the vicinity. Utility Model Content

[0003] This application discloses a projection device that ensures electromagnetic compatibility of the projection device while using a ring-shaped metal shell.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A projection device, comprising:

[0006] The housing includes an annular shell, the annular shell comprising:

[0007] Ring-shaped metal shell; and

[0008] An annular non-metallic shell, attached to the inner wall of the annular metallic shell; and

[0009] The main structure is fixed inside the annular shell; the main structure includes:

[0010] The metal bracket is electrically connected to the annular metal shell;

[0011] The annular metal shell surrounds the outside of the main structure along the direction from the front end to the rear end.

[0012] The projection device provided in this application embodiment includes a housing and a main structure. The housing includes an annular shell, which comprises an annular metal shell and an annular non-metal shell. The annular metal shell surrounds the outer side of the main structure from front to rear, providing protection and support. The annular non-metal shell is attached to the inner wall of the annular metal shell to enhance the strength and stability of the housing. The metal support in the main structure is electrically connected to the annular metal shell, enabling electromagnetic shielding and grounding protection, thus improving the electrical safety of the device. The projection device provided in this application embodiment employs a combined design of annular metal and annular non-metal shells, improving the overall structural stability of the housing and better protecting the internal main structure. By using non-metallic materials, the weight of the device can be reduced while maintaining structural strength, facilitating portability and installation. The electrical connection design between the metal support and the annular metal shell effectively reduces electromagnetic interference, improves the electromagnetic compatibility of the device, and ensures normal operation in complex electromagnetic environments.

[0013] In some embodiments, a first conductive spring is fixed on the metal bracket; a first clearance area is provided on the annular non-metallic shell to avoid the first conductive spring.

[0014] The first conductive spring passes through the first clearance area and is electrically connected to the annular metal shell.

[0015] In some embodiments, the main structure further includes:

[0016] The main support is fixed to the annular shell and connected to the metal support.

[0017] A functional module is fixed to the main support; the functional module includes:

[0018] A metal structural component, which is electrically connected to the metal support.

[0019] In some embodiments, the functional module includes:

[0020] An optical engine is located between the main support and the metal support; the optical engine is electrically connected to the metal support; and

[0021] A heat sink is thermally connected to the optical engine and is located between the main support and the metal support; the heat sink is electrically connected to the metal support.

[0022] In some embodiments, a second conductive spring is fixed on the metal bracket; the second conductive spring is electrically connected to the optical engine;

[0023] And / or, the radiator is electrically connected to the metal bracket via conductive foam.

[0024] In some embodiments, the housing further includes:

[0025] A front shell, which covers the open end of one side of the annular shell; the front shell includes:

[0026] A metal mesh cover, which is electrically connected to the annular metal shell.

[0027] In some embodiments, the metal mesh cover is provided with metal pins on the side facing the inside of the housing; the annular metal housing includes a pin connection portion; the annular non-metallic housing has a second clearance area and a third clearance area, the second clearance area being the metal pins; the third clearance area being used to avoid the pin connection portion.

[0028] The metal pin is electrically connected to the pin connection portion.

[0029] In some embodiments, the main structure further includes:

[0030] The wireless board is fixed to the main bracket;

[0031] The projection device also includes:

[0032] An external antenna is located outside the housing; the external antenna is connected to the wireless board via an adapter cable.

[0033] In some embodiments, the projection device further includes:

[0034] Gimbal; the external antenna is disposed inside the gimbal; and

[0035] The pivot shaft rotatably connects the gimbal to the annular shell;

[0036] The main structure also includes:

[0037] The adapter plate is fixed to the main bracket;

[0038] The adapter cable includes:

[0039] A first adapter cable connects the wireless board and the adapter board; and

[0040] The second adapter cable passes through the pivot and connects the adapter plate and the external antenna.

[0041] In some embodiments, the annular metal shell and the annular non-metal shell are detachably connected by a connector;

[0042] Alternatively, the annular metal shell can be bonded to the annular non-metallic shell;

[0043] Alternatively, the annular non-metallic shell may be a plastic shell, and the plastic shell and the annular metal shell may be co-extruded into an integral structure. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0046] Figure 3 An exploded view of a projection device provided in an embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the structure of a projection device with a hidden rear shell, provided in an embodiment of this application.

[0048] Figure 5 An exploded view of an annular shell in a projection device provided in an embodiment of this application;

[0049] Figure 6 This is a schematic diagram of the structure of a projection device with the rear shell and annular metal shell hidden, provided in an embodiment of this application.

[0050] Figure 7 This is a schematic diagram of the structure of a projection device after the housing is hidden, as provided in an embodiment of this application;

[0051] Figure 8 This is a schematic diagram of the structure of an annular non-metallic shell in a projection device provided in an embodiment of this application;

[0052] Figure 9 This is a schematic diagram of one side of the main structure of a projection device provided in an embodiment of this application;

[0053] Figure 10 This is a schematic diagram of the other side of the main structure of a projection device provided in an embodiment of this application;

[0054] Figure 11 This application provides a schematic diagram of the structure of a projection device that hides the rear shell and the main body.

[0055] Figure 12 This is a schematic diagram of the structure of the front shell in a projection device provided in an embodiment of this application;

[0056] Figure 13 This is a schematic diagram of the structure of a front grille in a projection device provided in an embodiment of this application;

[0057] Figure 14 This is a schematic diagram showing the connection between the metal pins of the front grille and the pin connection of the annular metal shell.

[0058] Figure 15A schematic diagram of a hidden rear shell and main body structure in another projection device provided in an embodiment of this application;

[0059] Figure 16 An exploded view of another projection device with a hidden rear shell and main structure provided in an embodiment of this application;

[0060] Figure 17 This is a schematic diagram of the structure of another projection device with a hidden rear shell provided in an embodiment of this application;

[0061] Icons: 1-Projection device; 2-Projection screen; 100-Housing shell; 200-Main structure; 300-Gimbal; 400-External antenna; 110-Ring shell; 120-Front shell; 130-Rear shell; 111-Ring non-metallic shell; 112-Ring metallic shell; 121-Metal mesh cover; 122-Decorative part; 131-Rear shell bracket; 210-Main bracket; 220-Metal bracket; 221-First conductive spring; 222-Second conductive spring ; 223-Conductive foam; 231-Optical engine; 232-Heat sink; 233-Main board; 234-Wireless board; 235-Adapter board; 2361-First adapter cable; 2362-Second adapter cable; 301-Gimbal housing; 302-Gimbal inner housing; 1111-First clearance area; 1112-Second clearance area; 1113-Third clearance area; 1121-Pin connection part; 1122-Connector; 1211-Metal pin. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can represent: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0063] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0064] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application.

[0065] like Figure 1 As shown, the projection system includes a projection device 1 and a projection screen 2. The projection screen 2 is located on the light-emitting side of the projection device 1. The audience faces the projection screen 2. The projection device 1 emits projection light, which enters the projection screen 2 and is reflected by the projection screen 2 before entering the viewer's eyes, thus allowing the viewer to see the projected image.

[0066] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application; Figure 3 An exploded view of a projection device provided in an embodiment of this application; Figure 4 This application provides a schematic diagram of a projection device that conceals the back cover and circuit board. Figure 5 An exploded view of an annular shell in a projection device provided in an embodiment of this application.

[0067] like Figures 2 to 5 As shown, this application embodiment provides a projection device, including a housing 100 and a main structure 200; the housing 100 includes an annular shell 110; the annular shell 110 includes an annular metal shell 112 and an annular non-metal shell 111, the annular non-metal shell 111 being attached to the inner wall of the annular metal shell 112; the main structure 200 is fixed inside the annular shell 110; the annular metal shell 112 surrounds the outer side of the main structure 200 along the direction from the front end to the rear end; the main structure 200 includes a metal bracket 220, which is electrically connected to the annular metal shell 112.

[0068] The projection device provided in this embodiment includes a housing 100 and a main structure 200. The housing 100 includes an annular shell 110, which comprises an annular metal shell 112 and an annular non-metal shell 111. The annular metal shell 112 surrounds the outer side of the main structure 200 along the front to rear direction, providing protection and support. The annular non-metal shell 111 is attached to the inner wall of the annular metal shell 112, enhancing the strength and stability of the housing 100. The metal bracket 220 in the main structure 200 is electrically connected to the annular metal shell 112, enabling electromagnetic shielding, grounding protection, and other functions, thus improving the electrical safety of the device. The projection device provided in this embodiment employs a combined design of the annular metal shell 112 and the annular non-metal shell 111, improving the structural stability of the entire housing 100 and better protecting the internal main structure 200. By using non-metallic materials, the weight of the device can be reduced while maintaining structural strength, facilitating portability and installation. The electrical connection design between the metal bracket 220 and the annular metal shell 112 can effectively reduce electromagnetic interference, improve the electromagnetic compatibility of the equipment, and ensure normal operation in complex electromagnetic environments.

[0069] In one embodiment, the annular metal shell 112 is an aluminum shell, and the annular non-metallic shell 111 is a plastic shell. The shell 100 of the projection device combines the advantages of aluminum and plastic, possessing advantages such as high strength, good heat dissipation, lightweight and aesthetically pleasing design, and ease of processing. This application embodiment uses an annular aluminum-clad plastic shell. Firstly, it saves on one side of the shell components, such as the lower shell or rear shell 130, reducing the need for a separate mold for the lower shell or rear shell 130, thereby lowering costs. Secondly, the annular aluminum-clad plastic shell structure has higher strength and more uniform stress distribution. Thirdly, it offers better heat dissipation. However, the complex annular curved aluminum shell has a significant impact on the overall EMC of the device. The overall EMC grounding design has relatively strict requirements, such as ensuring that the conductive structural components of the device are well interconnected and grounded. Poor grounding of the metal shell structure, in particular, can easily lead to EMC test failure. This application ensures grounding by electrically connecting the aluminum shell to the internal metal support 220, guaranteeing the overall device's EMC test compliance.

[0070] In practical implementation, the annular metal shell 112 is made of high-quality aluminum alloy, such as 5052, which possesses excellent mechanical properties and corrosion resistance. The wall thickness of the annular metal shell 112 is selected based on the weight of the projection equipment, heat dissipation requirements, and structural strength requirements to determine an appropriate aluminum wall thickness. Generally, the wall thickness should be reduced as much as possible while ensuring structural strength to reduce overall weight. The shape design of the annular metal shell 112 is based on the internal layout and appearance requirements of the projection equipment, resulting in a suitable aluminum shape. For example, extruded profiles or custom-shaped aluminum materials can be used to meet specific design needs.

[0071] The material selection for the ring-shaped non-metallic shell 111 should be a suitable plastic material for injection molding, such as ABS, PC, or ABS+PC. These materials have good flowability and moldability, and can meet the requirements of complex shapes. The thickness of the ring-shaped non-metallic shell 111 should be determined based on the usage environment and protection requirements of the projection equipment. A thicker plastic layer can provide better protection and cushioning performance, but it will also increase weight and cost. The ring-shaped non-metallic shell 111 should be made using advanced injection molding technology, preferably using precision injection molding processes to improve the uniformity and quality of the plastic layer. At the same time, the mold design and injection parameters should be optimized to reduce defects such as shrinkage and bubbles.

[0072] In some embodiments, the annular metal shell 112 and the annular non-metal shell 111 are detachably connected by a connector 1122. This detachable connection facilitates equipment maintenance and upgrades, allowing users to replace components as needed. For example, the annular metal shell 112 and the annular non-metal shell 111 can be fixed together mechanically using screws, clips, or other means. This method is simple and reliable, suitable for applications requiring high assembly precision.

[0073] In some embodiments, the annular metal shell 112 is bonded to the annular non-metallic shell 111. Bonding provides strong fixing force, ensuring a stable connection between the annular metal shell 112 and the annular non-metallic shell 111, while simplifying the assembly process. For example, an adhesive is used to bond and fix the annular metal shell 112 and the annular non-metallic shell 111. In specific implementations, an adhesive suitable for aluminum and plastic materials should be selected, and the bonding surfaces should be kept clean and dry to achieve good bonding results.

[0074] In some embodiments, the annular non-metallic shell 111 is a plastic shell, which is co-extruded with the annular metal shell 112 into a single structure. The co-extrusion design integrates the annular non-metallic shell 111 and the annular metal shell 112, improving the overall integrity and strength of the shell 100, reducing assembly steps, and lowering production costs. For example, during aluminum extrusion, plastic material is simultaneously extruded and adhered to the aluminum surface. This method achieves a seamless bond between the aluminum and the plastic layer, improving the overall aesthetics and strength.

[0075] It should be noted that the annular shell 110 also requires surface treatment, specifically including:

[0076] Anodizing: Anodizing is performed on aluminum materials to improve their corrosion resistance and hardness. Simultaneously, the anodized layer can also serve as a substrate for plastic layers, enhancing bond strength.

[0077] Spraying: Apply a suitable coating to the surface of the plastic layer to improve its abrasion resistance, UV resistance, and aesthetics. Choose environmentally friendly, non-toxic coatings whenever possible, and ensure even application and strong adhesion.

[0078] Brushed or polished: The aluminum surface is brushed or polished to achieve a specific texture and gloss. This treatment can improve the texture and visual effect of the projection device housing 100.

[0079] The housing 100 of the projection device provided in this application embodiment features high strength, good heat dissipation, lightweight, aesthetic appeal, and ease of processing. Aluminum, as the main structural material, provides excellent strength and rigidity, resisting external impacts and deformation; aluminum also has excellent thermal conductivity, which helps dissipate heat from the inside of the smart projector, improving the device's stability and lifespan; the addition of a plastic layer reduces the overall weight while providing a wide range of colors and textures to meet diverse aesthetic needs; both aluminum and plastic materials have good processing properties, facilitating the manufacture of complex-shaped shells and reducing production costs.

[0080] It should be noted that, since the entire annular metal shell 112 requires anodizing, laser engraving is performed on the inner side of the annular metal shell 112 to remove the oxide layer and improve conductivity.

[0081] In one embodiment, such as Figure 3 As shown, the main structure 200 includes a circuit board, which is fixed to a metal bracket 220 and located between the metal bracket 220 and the annular shell 110. Since the metal bracket 220 and the annular metal shell 110 are electrically connected, a complete electromagnetic shielding layer is formed, which can effectively reduce the impact of external electromagnetic interference on the circuit board, and at the same time prevent the leakage of electromagnetic signals generated inside the equipment, thereby improving the electromagnetic compatibility of the equipment.

[0082] The metal bracket 220 is electrically connected to the annular metal shell 112, which also enables grounding protection for the circuit board. This effective grounding protection design reduces the risk of electrical faults in the circuit board and improves the overall safety performance of the equipment.

[0083] Figure 7 This is a schematic diagram of the structure of a projection device after the housing is hidden, as provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of a ring-shaped non-metallic shell in a projection device provided in an embodiment of this application.

[0084] In some embodiments, such as Figures 6-8 As shown, a first conductive spring 221 is fixed on the metal bracket 220; a first clearance area 1111 is provided on the annular non-metallic shell 111 to clearance the first conductive spring 221; the first conductive spring 221 passes through the first clearance area 1111 and is electrically connected to the annular metal shell 112.

[0085] In one embodiment, such as Figure 6 and Figure 7As shown, the first conductive spring 221 is fixed to the metal bracket 220, serving as an electrical connection. The first clearance area 1111 on the annular non-metallic shell 111 not only ensures the normal operation of the first conductive spring 221 but also guarantees the integrity of the annular non-metallic shell 111, avoiding any impact on the overall structural strength. The first conductive spring 221 penetrates the first clearance area 1111 on the annular non-metallic shell 111, achieving an electrical connection with the annular metal shell 112, ensuring the continuity and stability of the shielding circuit. For example, the first clearance area 1111 can be a hollow area.

[0086] In this embodiment, the first conductive spring 221 ensures a reliable electrical connection between the metal bracket 220 and the annular metal shell 112, improving the electrical performance of the device. The first clearance area 1111 satisfies the working requirements of the first conductive spring 221 while maintaining the integrity of the annular non-metallic shell 111, achieving a perfect combination of function and structure.

[0087] like Figure 7 As shown, one end of the first conductive spring piece 221 is fixed to the metal bracket 220, and the other end is a free end. For example, the fixed end of the first conductive spring piece 221 is fixed to the metal bracket 220 via a threaded connector 1122, while the height of the free end from the metal bracket 220 is greater than the height of the fixed end from the metal bracket 220. This can also be understood as the free end of the first conductive spring piece 221 being raised. In one embodiment, the main structure 200 is slidably assembled with the annular shell 110, such as the main structure 200 sliding into the annular shell 110 from its rear end. As the main structure 200 slides into the annular shell 110, the annular non-metallic shell 111 presses against the metal bracket 220, causing the first conductive spring piece 221 to elastically deform. Until the main structure 200 slides into place, the free end of the first conductive spring piece 221 moves to the first clearance area 1111 of the annular non-metallic shell 111, and penetrates the first clearance area 1111 to abut against the annular metal shell 112, realizing the electrical connection between the metal bracket 220 and the annular metal shell 112, and finally forming a complete grounding loop, thus minimizing the electromagnetic interference of the whole machine. In this embodiment, the electrical connection is directly realized through the first conductive spring piece 221, reducing the additional connecting parts 1122, simplifying the assembly process, and improving production efficiency; reducing the additional connecting parts 1122 can also reduce material costs and assembly costs, thereby reducing the overall production cost.

[0088] Figure 9 This is a schematic diagram of one side of the main structure of a projection device provided in an embodiment of this application.

[0089] In some embodiments, such as Figure 9 As shown, and in combination Figure 3The main structure 200 also includes a main support 210 and a functional module. The main support 210 is fixed to the annular shell 110 and connected to the metal support 220. The functional module is fixed to the main support 210. The functional module includes a metal structural component, which is electrically connected to the metal support 220.

[0090] In one embodiment, the metal bracket 220 is fixed to the main bracket 210 and cooperates with the main bracket 210 to form an internal space accommodating some functional modules. The main bracket 210 and the metal bracket 220 serve as the skeleton of the entire main structure 200. The main bracket 210 is made of plastic reinforced with glass fiber. Plastic reinforced with glass fiber typically refers to adding glass fiber to plastic to enhance its properties. This composite material has high strength, rigidity, and heat resistance.

[0091] The functional module includes metal structural components that are electrically connected to the metal bracket 220, thus establishing an electrical connection between the functional module and the main structure 200. This electrical connection between the metal structural components and the metal bracket 220 integrates the functional module into the overall electromagnetic shielding system. This design enables the functional module to achieve electromagnetic shielding and grounding protection functions, improving the overall electrical performance of the equipment. Furthermore, a well-designed grounding protection system reduces the risk of electrical faults in the functional module, enhancing the overall safety performance of the equipment.

[0092] Figure 10 This is a schematic diagram of the other side of the main structure of a projection device provided in an embodiment of this application.

[0093] In some embodiments, such as Figure 10 As shown, the functional module includes an optical engine 231 and a heat sink 232, both of which are located between the main bracket 210 and the metal bracket 220; the optical engine 231 is electrically connected to the metal bracket 220; the heat sink 232 is thermally connected to the optical engine 231; and the heat sink 232 is electrically connected to the metal bracket 220.

[0094] In one embodiment, such as Figure 9 and Figure 10 As shown, the functional module includes an optical engine 231 and a heat sink 232. Both the optical engine 231 and the heat sink 232 are fixed within the internal space formed by the main support 210 and the metal support 220. The metal support 220 is fixed to the main support 210 and protects the optical engine 231, while also reducing the deformation of the main support 210, making the overall structure more reliable. The optical engine 231 and the heat sink 232 are both located between the main support 210 and the metal support 220, which can reduce the impact of vibration and shock on the optical engine 231 and improve its operational stability.

[0095] As the core component of the projection device, the optical engine 231 has a metal casing. The electrical connection between the metal casing of the optical engine 231 and the metal bracket 220 provides electromagnetic shielding and grounding protection. The heat sink 232, also made of metal, achieves electromagnetic shielding and grounding protection through its electrical connection with the metal bracket 220. This embodiment forms a multi-layered electromagnetic shielding system through the electrical connections between the optical engine 231 and the metal bracket 220, as well as between the heat sink 232 and the metal bracket 220. This ensures interconnectivity and conductivity between the metal parts of the entire device, such as the annular metal casing 112, the metal bracket 220, the optical engine 231, and the heat sink 232, thus resolving EMC issues. The robust grounding protection design reduces the risk of electrical failures in the optical engine 231 and the heat sink 232, improving the overall safety performance of the device.

[0096] In one embodiment, such as Figure 10 As shown, the functional module also includes a motherboard 233 and a driver board. The motherboard 233 is fixed to the metal bracket 220 on the side facing away from the optical engine 231, that is, the side of the metal bracket 220 facing the top wall of the annular shell 110. The metal bracket 220 serves as a fixing frame for the motherboard 233, reducing the deformation of the motherboard 233. The driver board is fixed to the side of the metal bracket 220 facing the optical engine 231, facilitating assembly and wiring with the optical engine 231.

[0097] In some embodiments, such as Figure 9 As shown, a second conductive spring 222 is fixed on the metal bracket 220; the second conductive spring 222 is electrically connected to the optical engine 231.

[0098] And / or, the radiator 232 is electrically connected to the metal bracket 220 via conductive foam 223.

[0099] In one embodiment, such as Figure 9 As shown, the second conductive spring 222 is fixed on the metal bracket 220, serving as an electrical connection. The second conductive spring 222 is electrically connected to the optical engine 231, ensuring a reliable electrical connection between the optical engine 231 and the metal bracket 220, thus improving the electrical performance of the device.

[0100] like Figure 6 and Figure 7 As shown, the heat sink 232 and the metal bracket 220 are electrically connected through conductive foam 223. The conductive foam 223 not only has good conductivity but also a certain degree of elasticity, which can compensate for dimensional errors that may occur during assembly, reduce the requirements for assembly precision, simplify the assembly process, and improve production efficiency.

[0101] In this embodiment, the optical engine 231 and the heat sink 232 are thermally connected. Through the second conductive spring 222 and the conductive foam 223, a multi-path electromagnetic shielding system is formed, which realizes multiple electromagnetic shielding, reduces the impact of external electromagnetic interference on the optical engine 231, and also prevents the leakage of electromagnetic signals generated inside the device.

[0102] Figure 11 This application provides a schematic diagram of the structure of a projection device that hides the rear shell and the main body. Figure 12 This is a schematic diagram of the structure of the front shell in a projection device provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the front mesh cover in a projection device provided in an embodiment of this application.

[0103] In some embodiments, such as Figure 11 As shown and combined Figure 2 and Figure 3 The housing 100 also includes a front housing 120, which covers one side opening of the annular housing 110; the front housing 120 includes a metal mesh cover 121, which is electrically connected to the annular metal housing 112.

[0104] In one embodiment, such as Figure 3 As shown, the housing 100 includes an annular shell 110, a front shell 120, and a rear shell 130, with the annular shell 110 serving as the fixed foundation for the main structure 200. The front shell 120 and the rear shell 130 respectively cover the front and rear openings of the annular shell 110. It should be noted that the front and rear ends of the annular shell 110 are defined according to the projection direction of the entire projection device; the light-emitting side of the projection device is defined as the front end, and the corresponding other end is the rear end. Based on this, the annular shell 110 includes a bottom wall, a top wall, a left side wall, and a right side wall. The walls of the annular shell 110, namely the bottom wall, top wall, left side wall, and right side wall, are connected to each other to form a cylindrical structure. For example, the bottom wall, top wall, left side wall, and right side wall are integrally formed. Alternatively, the annular shell 110 can be formed into a cylindrical structure by bending a plate-like material.

[0105] like Figures 11-13 As shown, the front shell 120 covers one open end of the annular shell 110, providing a sealed protection and reducing the impact of external dust and moisture on the internal structure. The front shell 120 includes a metal mesh cover 121, which is electrically connected to the annular metal shell 112. The metal mesh cover 121 provides electromagnetic shielding and ventilation. A decorative element 122 is also provided on the front shell 120. In this embodiment, the electrical connection between the metal mesh cover 121 and the annular metal shell 112 integrates the front shell 120 into the overall electromagnetic shielding system, achieving multiple layers of electromagnetic shielding and grounding protection, and improving the overall electrical performance of the equipment.

[0106] In one embodiment, such as Figure 3 As shown, the rear shell 130 also includes a rear shell bracket 131, which, for example, is a plastic part used to support and fix the rear shell 130.

[0107] In some embodiments, such as Figure 12 and Figure 13 As shown, and in combination Figure 8 The metal mesh cover 121 has metal pins 1211 on the side facing the inside of the housing 100; the annular metal shell 112 includes a pin connection portion 1121; the annular non-metallic shell 111 has a second clearance area 1112 and a third clearance area 1113, which are used to avoid the metal pins 1211 and the pin connection portion 1121, respectively; the pin connection portion 1121 is electrically connected to the metal pins 1211.

[0108] The metal pins 1211 and the pin connection portion 1121 serve to achieve electrical connection between the metal mesh cover 121 and the annular metal shell 112. The annular non-metallic shell 111 has a second clearance area 1112 and a third clearance area 1113, which respectively accommodate the metal pins 1211 and the pin connection portion 1121. Both the second clearance area 1112 and the third clearance area 1113 can be open areas. These areas ensure that the metal pins 1211 and the pin connection portion 1121 can smoothly penetrate the annular non-metallic shell 111 and achieve electrical connection. Through the electrical connection between the metal pins 1211 and the pin connection portion 1121, the metal mesh cover 121 is incorporated into the overall electromagnetic shielding system, achieving multiple layers of electromagnetic shielding and grounding protection, and improving the overall electrical performance of the equipment.

[0109] In one embodiment, such as Figure 13 As shown, the metal mesh cover 121 has multiple connection pins, and the length of the metal pins 1211 is greater than the length of the connection pins. In a specific implementation, for example, as... Figure 11 As shown, and in combination Figure 14The annular non-metallic shell 111 has a front fixing portion for fixing the front shell 120. The front fixing portion is perpendicular to the side wall of the annular non-metallic shell 111. The front fixing portion has a second clearance area 1112, and the left and right side walls of the annular non-metallic shell 111 have third clearance areas 1113. The annular metal shell 112 has a pin connection portion 1121. Exemplarily, the pin connection portion 1121 includes two connecting pieces, which clamp and fix the metal pin 1211 through connectors 11221122 to achieve electrical connection. In a specific implementation, the metal pin 1211 passes through the second clearance area 1112 and bends toward the side wall of the annular non-metallic shell 111 near the metal pin 1211, such as the right or left side wall; the pin connection portion 1121 is inserted into the interior of the annular non-metallic shell 111 through the third clearance area 1113 on the right or left side wall of the annular non-metallic shell 111. Insert the metal pin 1211 between the two connecting pieces of the pin connection portion 1121, and then pass the connector 1122 through the two connecting pieces and fix it to the front end fixing portion of the annular non-metallic shell 111. For example, the connector 1122 is a threaded connector 1122 such as a screw.

[0110] Figure 15 A schematic diagram of a hidden rear shell and main body structure in another projection device provided in an embodiment of this application; Figure 16 An exploded view of another projection device with a hidden rear shell and main structure provided in an embodiment of this application; Figure 17 This is a schematic diagram of the structure of another projection device with a hidden back cover provided in an embodiment of this application.

[0111] In some embodiments, such as Figure 9 , Figure 10 and Figure 15 As shown, the main structure 200 also includes a wireless board 234 fixed to the main bracket 210; the wireless board 234 can be a WiFi board. As the core component for wireless communication of the device, the wireless board 234's fixation to the main bracket 210 ensures its stability and reliability. The projection device also includes an external antenna 400 located outside the housing 100; the external antenna 400 is connected to the wireless board 234 via an adapter cable. The external antenna 400 improves the device's wireless signal reception and transmission capabilities, especially in complex operating environments. The adapter cable allows for greater flexibility in the placement of the external antenna 400, enabling adjustments as needed.

[0112] In one embodiment, the wireless board 234 is connected to the motherboard 233. This embodiment uses a design adapter to connect the external antenna that enhances the signal to the internal motherboard 233 or the WiFi board, ensuring that the signal meets user requirements.

[0113] In some embodiments, such as Figures 15-17As shown, the projection device also includes a gimbal 300 and a pivot; the gimbal 300 is rotatably connected to the annular shell 110 via the pivot; the external antenna 400 is disposed inside the gimbal 300.

[0114] The main structure 200 also includes an adapter plate 235 fixed to the main bracket 210; the adapter cable includes a first adapter cable 2361 and a second adapter cable 2362; the first adapter cable 2361 connects the wireless board 234 and the adapter plate 235; the second adapter cable 2362 passes through the pivot and connects the adapter plate 235 and the external antenna 400.

[0115] In one embodiment, such as Figure 16 As shown, the gimbal 300 includes an inner gimbal shell 302 and an outer gimbal shell 301. An external antenna is attached to the bottom of the gimbal 300 and located between the inner gimbal shell 302 and the outer gimbal shell 301. The inner gimbal shell 302 and the outer gimbal shell 301 are joined together to securely shield the external antenna 400, providing protection. For example, both the inner gimbal shell 302 and the outer gimbal shell 301 are made of plastic.

[0116] The annular shell 110 is rotatably mounted on the pan-tilt unit 300 via a pivot, allowing the projection device to freely adjust its angle within a certain range to adapt to different usage scenarios. The external antenna 400 is housed inside the pan-tilt unit 300. This not only protects the external antenna 400 but also ensures it rotates with the pan-tilt unit 300, guaranteeing signal reception quality at different angles. The adapter plate 235, as an intermediate connecting component, plays a role in signal transmission. The first adapter cable 2361 connects the wireless board 234 and the adapter plate 235, achieving initial wireless signal transmission. The second adapter cable 2362 passes through the pivot and connects the adapter plate 235 and the external antenna 400, ensuring complete signal transmission from the adapter plate 235 to the external antenna 400.

[0117] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A projection device, characterized in that, include: The housing includes an annular shell, the annular shell comprising: Ring-shaped metal shell; and An annular non-metallic shell, attached to the inner wall of the annular metallic shell; and The main structure is fixed inside the annular shell; the main structure includes: The metal bracket is electrically connected to the annular metal shell; The annular metal shell surrounds the outside of the main structure along the direction from the front end to the rear end.

2. The projection device according to claim 1, characterized in that, A first conductive spring is fixed on the metal bracket; a first clearance area is provided on the annular non-metallic shell to avoid the first conductive spring. The first conductive spring passes through the first clearance area and is electrically connected to the annular metal shell.

3. The projection device according to claim 1, characterized in that, The main structure also includes: The main support is fixed to the annular shell and connected to the metal support. A functional module is fixed to the main support; the functional module includes: A metal structural component, which is electrically connected to the metal support.

4. The projection device according to claim 3, characterized in that, The functional module includes: An optical engine is located between the main support and the metal support; the optical engine is electrically connected to the metal support; and A heat sink is thermally connected to the optical engine and is located between the main support and the metal support; the heat sink is electrically connected to the metal support.

5. The projection device according to claim 4, characterized in that, A second conductive spring is fixed on the metal bracket; the second conductive spring is electrically connected to the optical engine. And / or, the radiator is electrically connected to the metal bracket via conductive foam.

6. The projection device according to claim 1, characterized in that, The housing also includes: A front shell, which covers the open end of one side of the annular shell; the front shell includes: A metal mesh cover, which is electrically connected to the annular metal shell.

7. The projection device according to claim 6, characterized in that, The metal mesh cover has metal pins on the side facing the inside of the housing; the annular metal shell includes a pin connection portion; the annular non-metallic shell has a second clearance area and a third clearance area, the second clearance area being used to avoid the metal pins; the third clearance area being used to avoid the pin connection portion; The metal pin is electrically connected to the pin connection portion.

8. The projection device according to claim 3, characterized in that, The main structure also includes: The wireless board is fixed to the main bracket; The projection device also includes: An external antenna is located outside the housing; the external antenna is connected to the wireless board via an adapter cable.

9. The projection device according to claim 8, characterized in that, The projection device also includes: Gimbal; the external antenna is disposed inside the gimbal; and The pivot shaft rotatably connects the gimbal to the annular shell; The main structure also includes: The adapter plate is fixed to the main bracket; The adapter cable includes: A first adapter cable connects the wireless board and the adapter board; and The second adapter cable passes through the pivot and connects the adapter plate and the external antenna.

10. The projection device according to any one of claims 1-9, characterized in that, The annular metal shell and the annular non-metal shell are detachably connected by a connector. Alternatively, the annular metal shell can be bonded to the annular non-metallic shell; Alternatively, the annular non-metallic shell may be a plastic shell, and the plastic shell and the annular metal shell may be co-extruded into an integral structure.

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