A projection device

Abstract

The application relates to the projection field and discloses a projection device which comprises a shell and a main body structure. The main body structure is arranged in the shell and specifically comprises a main body frame fixed to the shell and a plurality of functional modules fixed to the main body frame. The main body frame comprises a main support and a fixing plate, and the fixing plate cooperates with the main support to form an internal space of the main body frame. A part of the plurality of functional modules are located in the internal space, and the other part of the plurality of functional modules are located between the main body frame and the shell. The application relies on the main body frame to realize the stacking of the internal structure of the whole machine, fully utilizes the space, so that the volume of the whole main body structure can be reduced, and the volume of the whole projection device is further reduced. Due to the reduction of the volume, the whole projection device is more portable.

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 continuous development of projection technology, smart projection devices are increasingly widely used in education, entertainment, and business. These devices not only provide users with a high-quality visual experience but also meet the needs of various scenarios. For example, in education, smart projection devices can vividly present classroom content to students, improving their learning interest and efficiency; in entertainment, they can provide a large-screen experience for home theaters, allowing users to feel the immersive effect of a movie theater at home; and in business, smart projection devices can help companies present information more intuitively in meetings, exhibitions, and other occasions.

[0003] However, traditional projection devices often suffer from poor portability due to their large size, when faced with the needs of different user groups and usage scenarios. Therefore, designing a portable smart projector that can adapt to multiple user scenarios is particularly important. Utility Model Content

[0004] This application discloses a projection device for providing a small and portable projection device.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A projection device, comprising:

[0007] Casing; and

[0008] The main structure is disposed inside the shell; the main structure includes:

[0009] The main frame, fixed to the shell, includes:

[0010] Main support; and

[0011] The fixing plate, in conjunction with the main support, forms the internal space of the main frame; and

[0012] Multiple functional modules are fixed to the main frame; of the multiple functional modules, a portion of the functional modules are located in the internal space, and another portion of the functional modules are located between the main frame and the shell.

[0013] The aforementioned projection device includes a housing and a main structure located inside the housing. The main structure includes a main frame and multiple functional modules fixed to the main frame. The main frame includes a main support and a fixing plate. The main support serves as the foundation, and the fixing plate is fixed to the main support, together forming the skeleton of the main structure. Of the multiple functional modules, some are located inside the main frame, while the remaining functional modules are located between the main frame and the housing. The main frame allows for the stacking of the internal structures, making full use of space and reducing the overall volume of the main structure, thereby reducing the overall size of the projection device and making it easier to carry.

[0014] In some embodiments, the housing includes:

[0015] An annular shell, wherein the main frame is fixed to the annular shell;

[0016] A front shell, connected to the annular shell and covering the front opening of the annular shell; and

[0017] The rear shell is connected to the annular shell and covers the rear opening of the annular shell;

[0018] Of the plurality of functional modules, at least one functional module is located between the main frame and the annular shell; at least one functional module is located between the main frame and the front shell.

[0019] In some embodiments, a slide rail assembly is provided between the main frame and the annular shell, the slide rail assembly comprising:

[0020] The first slide rail extends along the axial direction of the annular shell;

[0021] The second slide rail is slidably engaged with the first slide rail;

[0022] Wherein, the first slide rail is disposed on the main frame and the second slide rail is disposed on the annular shell; or, the first slide rail is disposed on the annular shell and the second slide rail is disposed on the main frame.

[0023] In some embodiments, the first slide rail is disposed on the main support;

[0024] The main support includes:

[0025] Base plate;

[0026] The first side plate is connected to one side of the base plate; and

[0027] The second side plate is connected to the other side of the bottom plate, and the arrangement direction of the second side plate and the first side plate is perpendicular to the axis of the annular shell;

[0028] The first slide rail is provided in at least one of the base plate, the first side plate and the second side plate.

[0029] In some embodiments, the annular shell comprises:

[0030] Ring-shaped plastic shell; and

[0031] An annular aluminum shell is fitted over the annular plastic shell.

[0032] In some embodiments, the plurality of functional modules includes a wireless module; the wireless module includes:

[0033] The wireless board is fixed to the main bracket on the side facing the front shell.

[0034] An adapter plate is fixed to the side of the main bracket facing the annular shell and is used to connect to an external antenna.

[0035] Adapter cable, used to connect the wireless board and the adapter board; and

[0036] The shielding cover is fixed to the side of the fixing plate away from the main support and is located between the annular shell and the wireless board.

[0037] In some embodiments, the projection device further includes:

[0038] A gimbal bracket, rotatably connected to the housing, is used to adjust the projection angle of the projection device; the gimbal bracket includes:

[0039] Base;

[0040] A support arm connects the base and the housing; and

[0041] The first rotating shaft assembly rotatably connects the support arm and the housing.

[0042] In some embodiments, the first rotating shaft assembly includes:

[0043] The first fixed arm is fixed to the support arm;

[0044] The second fixing arm is fixed to the housing;

[0045] A first rotating shaft passes through the first fixed arm and is connected to the second fixed arm;

[0046] The first damping element is disposed between the first rotating shaft and the first fixed arm; or, it is disposed between the first fixed arm and the second fixed arm.

[0047] In some embodiments, the gimbal bracket further includes:

[0048] The second rotating shaft assembly rotatably connects the support arm and the base.

[0049] In some embodiments, the second rotating shaft assembly includes:

[0050] The first fixing part is fixed to the support arm;

[0051] The second fixing part is fixed to the base;

[0052] The second rotating shaft passes through the second fixing part and is connected to the first fixing part;

[0053] The second damping element is disposed between the second rotating shaft and the second fixed part; or, it is disposed between the first fixed part and the second fixed part. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application;

[0055] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0056] Figure 3 An exploded view of a projection device provided in an embodiment of this application;

[0057] Figure 4 This is a schematic diagram of one side of the main structure of a projection device provided in an embodiment of this application;

[0058] Figure 5 This is a schematic diagram of the other side of the main structure of a projection device provided in an embodiment of this application;

[0059] Figure 6 This is a schematic diagram of the structure of the main support in a projection device provided in an embodiment of this application;

[0060] Figure 7 This is a schematic diagram of the structure of an annular shell in a projection device provided in an embodiment of this application;

[0061] Figure 8 An assembly diagram of an annular shell and a main support frame in a projection device provided for an embodiment of this application;

[0062] Figure 9 An exploded view of an annular shell in a projection device provided in an embodiment of this application;

[0063] Figure 10 This is a schematic diagram of the structure of a gimbal bracket in a projection device provided in an embodiment of this application;

[0064] Figure 11An exploded view of a gimbal bracket in a projection device provided in an embodiment of this application;

[0065] Figure 12 This is a schematic diagram of another projection device provided in an embodiment of this application;

[0066] Figure 13 This is a schematic diagram of the structure of the first rotating shaft assembly in another projection device provided in an embodiment of this application;

[0067] Figure 14 An assembly diagram showing the connection between the base and the support arm via a second rotating shaft assembly in another projection device provided in an embodiment of this application;

[0068] Figure 15 A cross-sectional view of a projection device provided in this application embodiment in which the base and the support arm are connected by a second rotating shaft assembly;

[0069] Figures 16-18 A schematic diagram illustrating various states of another projection device provided in an embodiment of this application;

[0070] Figure 19 and Figure 20 This is a schematic diagram illustrating an application scenario of another projection device provided in an embodiment of this application;

[0071] Icons: 1-Projection device; 2-Projection screen; 100-Housing shell; 200-Main structure; 300-Gimbal bracket; 110-Annular shell; 120-Front shell; 130-Rear shell; 111-Annular plastic shell; 112-Annular aluminum shell; 113-Second slide rail; 121-Decorative part; 131-Rear shell bracket; 210-Main bracket; 220-Fixing plate; 211-First slide rail; 231-Optical module; 232-Heat dissipation module; 233-Audio module; 234-Main board; 235-Driver board; 301-Gimbal housing; 302-Gimbal Inner shell; 310-Base; 320-Support arm; 330-First pivot assembly; 340-Second pivot assembly; 331-First fixing arm; 332-Second fixing arm; 333-First pivot; 334-First damping element; 341-First fixing part; 342-Second fixing part; 343-Second pivot; 344-Second damping element; 2311-Zoom lens; 2312-Camera; 2313-3DTOF; 2321-Fan; 2322-Heat sink; 2361-Wireless board; 2362-Adapter board; 2363-Shielding cover. Detailed Implementation

[0072] 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.

[0073] 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.

[0074] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application.

[0075] 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.

[0076] 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 is a schematic diagram of one side of the main structure of a projection device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the other side of the main structure of a projection device provided in an embodiment of this application.

[0077] like Figures 2 to 5As shown in the figure, this application embodiment provides a projection device, including a housing 100 and a main structure 200. The main structure 200 is disposed inside the housing 100, specifically including a main frame fixed to the housing 100 and multiple functional modules fixed to the main frame. The main frame includes a main support 210 and a fixing plate 220, with the fixing plate 220 and the main support 210 cooperating to form the internal space of the main frame. Of the multiple functional modules, some are located in the internal space, and others are located between the main frame and the housing 100, optimizing the use of space inside the housing 100. The main frame can stably fix the multiple functional modules, ensuring the reliability of the device during operation.

[0078] The aforementioned projection device includes a housing 100 and a main structure 200 located inside the housing 100. The main structure 200 includes a main frame and multiple functional modules fixed to the main frame. The main frame includes a main support 210 and a fixing plate 220. The main support 210 serves as a foundation, and the fixing plate 220 is fixed to the main support 210, together forming the skeleton of the main structure 200. Of the multiple functional modules, some are located inside the main frame, while the remaining functional modules are located between the main frame and the housing 100. The main frame allows for the stacking of the internal structure, making full use of space and reducing the overall volume of the main structure 200, thereby reducing the overall size of the projection device. This reduction in size makes the entire projection device more portable.

[0079] In some embodiments, such as Figure 3 As shown, the housing 100 includes an annular shell 110, a front shell 120, and a rear shell 130; wherein, the main frame is fixed to the annular shell 110; the front shell 120 is connected to the annular shell 110 and covers the front opening of the annular shell 110; the rear shell 130 is connected to the annular shell 110 and covers the rear opening of the annular shell 110.

[0080] Among the multiple functional modules, at least one functional module is located between the main frame and the annular shell 110; at least one functional module is located between the main frame and the front shell 120.

[0081] In one embodiment, such as Figure 3As 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 frame. 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.

[0082] In one embodiment, the specific positions of the functional modules are arranged as follows: at least one functional module is located between the main frame and the annular shell 110; at least one functional module is located between the main frame and the front shell 120. Specifically, the at least one functional module located between the main frame and the annular shell 110 can be located between the top wall of the main frame and the annular shell 110, or between the bottom wall of the main frame and the annular shell 110.

[0083] The projection device provided in this application enhances the structural stability of the entire device by fixing the main frame to the annular shell 110, with the front shell 120 and rear shell 130 respectively covering the openings at both ends of the annular shell 110. Distributing the functional modules between the main frame and the annular shell 110, and between the main frame and the front shell 120, fully utilizes the internal space of the shell 100 and further optimizes the spatial layout. Since the functional modules are clearly distributed in different areas, maintenance or upgrades are more convenient, allowing for quick location and processing of specific functional modules as needed.

[0084] In some embodiments, such as Figure 4 and Figure 5 As shown, the multiple functional modules include an optical module 231, a heat dissipation module 232, an audio module 233, a motherboard 234, and a driver board 235. The optical module 231 includes an optical engine, a zoom lens 2311, a camera 2312, and a 3D TOF 2313.

[0085] In one embodiment, such as Figure 4 and Figure 5As shown, the main support 210 and the fixing plate 220 serve as the skeleton of the internal structure. The main support 210 is made of plastic reinforced with glass fiber. This plastic reinforced with glass fiber material typically refers to adding glass fiber to plastic to enhance its performance. This composite material has high strength, rigidity, and heat resistance. The fixing plate 220 is a metal plate. The optical engine and the heat dissipation module 232 are both fixed within the internal space of the main support 210. The heat dissipation module 232 includes a fan 2321 and a heat sink 2322. The fixing plate 220 is fixed to the main support 210 and protects the optical engine, while also reducing the deformation of the main support 210, making the overall structure more reliable. On the other hand, the main board 234 is fixed to the side of the fixing plate 220 away from the optical engine, that is, the side of the fixing plate 220 facing the top wall of the annular shell 110. The fixing plate 220 serves as a fixing frame for the main board 234, reducing the deformation of the main board 234, while the metal material of the fixing plate 220 ensures that the circuit electromagnetic shielding (EMC) and electrostatic discharge (ESD) parameters meet the requirements. The drive board 235 is fixed to the mounting plate 220 facing the optical engine side, facilitating assembly with the optical engine and cable management. The camera 2312, 3D TOF 2313, and zoom lens 2311 are all fixed to the main bracket 210. For example, the camera 2312, 3D TOF 2313, and zoom lens 2311 are all fixed to the main bracket 210 facing the front shell 120 side to ensure the focusing and calibration accuracy required by the projection device.

[0086] The projection device provided in this application embodiment uses a high-strength, high-rigidity, and high-heat-resistant composite material (plastic plus glass fiber) as the material of the main support 210 and a metal plate as the material of the fixing plate 220, which significantly enhances the overall reliability of the device. Fixing the optical engine and heat dissipation module 232 within the internal space of the main support 210 helps to better manage the heat distribution inside the device and improves heat dissipation performance. The metal fixing plate 220 ensures that the electromagnetic shielding (EMC) and electrostatic discharge (ESD) parameters of the circuitry meet the requirements, improving the electromagnetic compatibility and safety of the device. The main board 234 is fixed to the side of the fixing plate 220 away from the optical engine, and the drive board 235 is fixed to the side of the fixing plate 220 facing the optical engine. This design not only optimizes the utilization of internal space but also improves the convenience of assembly. The camera 2312, 3D TOF, and zoom lens 2311 are all fixed to the side of the main support 210 facing the front shell 120. This layout ensures high precision in the focusing and calibration process of the projection device.

[0087] In some embodiments, such as Figure 3As shown, the multiple functional modules also include a wireless module; the wireless module includes a wireless board 2361, an adapter board 2362, an adapter cable (not shown in the figure), and a shielding cover 2363; wherein, the wireless board 2361 is fixed to the side of the main bracket 210 facing the front shell 120; the adapter board 2362 is fixed to the side of the main bracket 210 facing the annular shell 110 and is used to connect to an external antenna; the adapter cable is used to connect the wireless board 2361 and the adapter board 2362; the shielding cover 2363 is fixed to the side of the fixing plate 220 away from the main bracket 210 and is located between the annular shell 110 and the wireless board 2361.

[0088] In one embodiment, such as Figure 3 As shown, the wireless board 2361 (wifi board) is fixed to the main bracket 210 on the side facing the front shell 120 to avoid being shielded by the metal ring shell 110 and affecting the signal. In order to further enhance the wifi signal, two external antennas are designed to be placed outside the shell 100, such as inside the gimbal. Two adapter cables are led out from the wireless board 2361 and connected to the adapter board 2362, so that the adapter board 2362 can be connected to the external antennas outside the shell 100.

[0089] A shielding cover 2363 is provided on the side of the fixing plate 220 opposite to the drive plate 235 to reduce external interference to the WiFi signal of the wireless board 2361. For example, the shielding cover 2363 is a stainless steel cover.

[0090] The projection device provided in this application fixes the wireless board 2361 to the side of the main bracket 210 facing the front shell 120, and the adapter plate 2362 to the side of the main bracket 210 facing the annular shell 110. This layout helps optimize the signal transmission path and reduce signal interference. The position design of the shielding cover 2363 can effectively shield external electromagnetic interference, protect the wireless board 2361 to work normally, and thus improve the quality and stability of wireless communication. The various components in the wireless module have clear division of labor and reasonable position distribution, making maintenance or upgrades more convenient, and allowing for quick location and handling of specific components as needed.

[0091] Figure 6 This is a schematic diagram of the structure of the main support in a projection device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an annular shell in a projection device provided in an embodiment of this application; Figure 8 This is an assembly diagram of an annular shell and a main support in a projection device provided in an embodiment of this application.

[0092] In some embodiments, such as Figures 6-8 As shown, a slide rail assembly is provided between the main frame and the annular shell 110. The slide rail assembly includes a first slide rail 211 and a second slide rail 113, wherein the first slide rail 211 extends along the axial direction of the annular shell 110; and the second slide rail 113 slides in cooperation with the first slide rail 211.

[0093] The positions of the first slide rail 211 and the second slide rail 113 can be selected in several ways. For example, the first slide rail 211 can be set on the main frame and the second slide rail 113 can be set on the annular shell 110; or, the first slide rail can be set on the annular shell and the second slide rail can be set on the main frame.

[0094] The slide rail assembly is designed to allow the main frame to slide relative to the annular shell 110, which greatly facilitates the disassembly, assembly, and maintenance of the equipment. Different slide rail configurations enhance the adaptability of the equipment structure, enabling it to better cope with different operating environments and needs.

[0095] In one embodiment, such as Figure 6 and Figure 7 As shown, the main support 210 is provided with a first slide rail 211, and the annular shell 110 is simultaneously provided with a second slide rail 113, which facilitates the sliding assembly of the main structure 200 into the annular shell 110. In specific implementation, the first slide rail 211 and the main support 210 are integrally formed, and / or the second slide rail 113 and the annular shell 110 are integrally formed.

[0096] In some embodiments, such as Figure 6 As shown, when the first slide rail 211 is provided on the main support 210, the main support 210 includes a base plate, a first side plate and a second side plate. The first side plate and the second side plate are connected to each other on both sides of the base plate, and the arrangement direction of the second side plate and the first side plate is perpendicular to the axis of the annular shell 110; wherein, at least one of the base plate, the first side plate and the second side plate is provided with the first slide rail 211.

[0097] In one embodiment, such as Figure 6 As shown, the design of the main support 210 enhances the structural stability of the entire main frame through the combination of a base plate, a first side plate, and a second side plate. The base plate is located on the side of the main support 210 facing the bottom wall of the annular shell 110, the first side plate is located on the side of the main support 210 facing the left side wall of the annular shell 110, and the second side plate is located on the side of the main support 210 facing the right side wall of the annular shell 110. A first slide rail 211 is provided on the side of the base plate facing the bottom wall of the annular shell 110, synchronously, as... Figure 7 As shown, a second slide rail 113 is provided on the inner surface of the bottom wall to facilitate the assembly of the main support 210, such as... Figure 8 As shown. A first slide rail 211 is provided on the side of the first side plate facing the left side wall, and correspondingly, a second slide rail 113 is also provided on the inner wall surface of the left side wall of the annular shell 110. A first slide rail 211 is provided on the side of the second side plate facing the right side wall, and correspondingly, a second slide rail 113 is also provided on the inner wall surface of the right side wall of the annular shell 110. The slide rail assemblies on both sides of the main support 210 also serve a limiting function, ensuring the stability and reliability of the internal main support 210.

[0098] Figure 9 An exploded view of an annular shell in a projection device provided in an embodiment of this application.

[0099] In some embodiments, the annular shell 110 includes an annular plastic shell 111 and an annular aluminum shell 112, with the annular aluminum shell 112 sleeved on the outside of the annular plastic shell 111.

[0100] By encasing the annular plastic shell 111 within an annular aluminum shell 112, this double-layer structure enhances the protection of internal components and improves the overall durability of the equipment. The annular plastic shell 111 is typically lightweight, while the annular aluminum shell 112 provides higher strength; this combination reduces weight while maintaining equipment strength. Aluminum has excellent thermal conductivity, and the use of the annular aluminum shell 112 effectively improves the equipment's heat dissipation performance, ensuring stable operation over extended periods.

[0101] In one embodiment, such as Figure 3 As shown, the rear shell 130 also includes a rear shell bracket 131. Exemplarily, the rear shell bracket 131 is a plastic component used to support and fix the rear shell 130. The front shell 120 has multiple metal connecting parts that connect to the annular aluminum shell 112. Each metal connecting part is connected to the annular aluminum shell 112 to achieve electromagnetic shielding. A decorative element 121 is also provided on the front shell 120.

[0102] Figure 10 This is a schematic diagram of the structure of a gimbal bracket in a projection device provided in an embodiment of this application; Figure 11 An exploded view of a gimbal bracket in a projection device provided in an embodiment of this application.

[0103] In some embodiments, such as Figures 10-11 As shown, and in combination Figure 1 The projection device also includes a gimbal bracket 300, which is rotatably connected to the housing 100 and used to adjust the projection angle of the projection device. The gimbal bracket 300 includes a base 310, a support arm 320 and a first rotating shaft assembly 330. The support arm 320 is connected between the base 310 and the housing 100. The first rotating shaft assembly 330 rotatably connects the support arm 320 and the housing 100.

[0104] In one embodiment, such as Figure 1As shown, the housing 100 and the main structure 200 form the main unit of the projection device. The main unit is rotatably mounted on the gimbal bracket 300 via the first rotating shaft assembly 330. An external antenna is installed inside the gimbal bracket 300, which is connected to the adapter plate 2362. An adapter cable for connecting the external antenna passes through the first rotating shaft assembly 330 and extends into the gimbal bracket 300 to connect with the external antenna. The main unit can rotate at multiple angles in the vertical direction and tilt freely in the horizontal direction on the gimbal bracket 300, enriching the user's usage scenarios. At the same time, the main unit and the gimbal bracket 300 are connected as a whole, making it easy to carry and compatible with outdoor use scenarios.

[0105] The design of the gimbal bracket 300, especially the use of the first pivot assembly 330, allows for flexible adjustment of the projection angle of the projector to meet the needs of different scenarios. This design greatly improves the convenience and flexibility for users when using the projector, enhancing the overall user experience. The gimbal bracket 300 design enables the projector to better adapt to different installation environments and usage conditions, enhancing the device's adaptability.

[0106] In another embodiment, such as Figure 11 As shown, the gimbal bracket 300 includes a gimbal outer shell 301 and a gimbal inner shell 302. There is a space between the gimbal outer shell 301 and the gimbal inner shell 302 to accommodate an external antenna. The adapter plate 2362 is connected to the external antenna inside the gimbal bracket 300 via an external pull adapter cable and a first rotating shaft assembly 330 to enhance the wireless signal.

[0107] Figure 12 This is a schematic diagram of another projection device provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the first rotating shaft assembly in another projection device provided in an embodiment of this application.

[0108] In some embodiments, such as Figure 12 and Figure 13 As shown, the first rotating shaft assembly 330 includes a first fixed arm 331, a second fixed arm 332, a first rotating shaft 333, and a first damping member 334; wherein, the first fixed arm 331 is fixed to the support arm 320; the second fixed arm 332 is fixed to the housing 100; the first rotating shaft 333 passes through the first fixed arm 331 and is connected to the second fixed arm 332; the first damping member 334 is disposed between the first rotating shaft 333 and the first fixed arm 331; or, the first damping member 334 is disposed between the first fixed arm 331 and the second fixed arm 332.

[0109] In one embodiment, such as Figure 12 and Figure 13As shown, the main unit is fixed to the gimbal bracket 300 via the first pivot assembly 330. The main unit and the second fixed wall are fixed together by screws, and the gimbal bracket 300 is fixed to the first fixed wall by screws. The first pivot 333 and the first fixed wall and / or the second fixed wall have a certain damping, which can ensure that the main unit can be hovered at any angle (within 360° range).

[0110] The use of the first damping element 334 provides appropriate resistance when adjusting the projection angle, ensuring a smooth adjustment process and a stable angle after adjustment. This design improves the user's operational precision when adjusting the projection angle and avoids angle deviations caused by excessive looseness of the device. The design of the first pivot assembly 330 enables the projection device to adjust the projection angle more precisely, thereby enhancing the overall user experience.

[0111] Figure 14 An assembly diagram showing the connection between the base and the support arm via a second rotating shaft assembly in another projection device provided in this application embodiment.

[0112] In some embodiments, the gimbal bracket 300 further includes a second pivot assembly 340, which rotatably connects the support arm 320 and the base 310.

[0113] With the design of the second hinge assembly 340, the gimbal bracket 300 can not only be adjusted in terms of projection angle, but also rotate between the support arm 320 and the base 310, thus achieving flexible multi-dimensional adjustment. This design enhances the overall stability of the gimbal bracket 300, ensuring that the device remains stable during multi-dimensional adjustments. The addition of the second hinge assembly 340 allows the projection device to adapt to more usage scenarios, easily handling both horizontal and vertical adjustments.

[0114] Figure 15 A cross-sectional view of a projection device provided in an embodiment of this application, in which the base and the support arm are connected by a second rotating shaft assembly.

[0115] In some embodiments, the second rotating shaft assembly 340 includes a first fixing part 341, a second fixing part 342, a second rotating shaft 343, and a second damping member 344; wherein the first fixing part 341 is fixed to the support arm 320; the second fixing part 342 is fixed to the base 310; the second rotating shaft 343 passes through the second fixing part 342 and is connected to the first fixing part 341; the second damping member 344 is disposed between the second rotating shaft 343 and the second fixing part 342; or, the second damping member 344 is disposed between the first fixing part 341 and the second fixing part 342.

[0116] In one embodiment, such as Figure 14 and Figure 15As shown, the support arm 320 is fixed to the base 310 via the second pivot assembly 340. The base 310 and the second fixing part 342 are fixed together by screws, and the support arm 320 and the first fixing part 341 are also fixed together by screws. A damping element, such as a friction plate, is located between the first fixing part 341 and the second fixing part 342 to ensure that the support arm 320 can be suspended relative to the base 310 at any angle (within a 360° range).

[0117] The use of the second damping element 344 provides appropriate resistance during rotational adjustment between the support arm 320 and the base 310, ensuring a smooth adjustment process and stable angle after adjustment, thereby enhancing the flexibility of device adjustment. This design improves the ease of operation for users when adjusting the gimbal bracket 300, allowing for easier multi-dimensional adjustments. The design of the second pivot assembly 340 further enhances the overall stability of the gimbal bracket 300, ensuring that the device does not wobble or become unstable during multi-dimensional adjustments. Because it enables more precise and stable multi-dimensional adjustments, the projection device can adapt to more complex usage scenarios, expanding its applicability.

[0118] Figures 16-18 This is a schematic diagram of various states of another projection device provided in an embodiment of this application. Figure 19 and Figure 20 This is a schematic diagram illustrating an application scenario of another projection device provided in an embodiment of this application.

[0119] like Figure 16 As shown, the entire projection device is foldable, reducing packaging size and transportation costs. Additionally, by Figures 16-17 As shown, the projected image can be panned vertically to adjust the image height without any loss of image quality. Figure 16 and Figure 18 As shown, with the projected image height being consistent, the front and back positions can be adjusted to adjust the size of the projected image without moving the table or projector.

[0120] like Figure 19 and Figure 20 As shown, by increasing the rotational freedom of the base 310 and the support arm 320, the projection can be folded into three sections, increasing the application scenarios and meeting more usage needs.

[0121] The projection device provided in this application has the characteristics of compact structure, light weight, high reliability and portability.

[0122] 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: case; and The main structure is located inside the shell. The main structure includes: The main frame, fixed to the shell, includes: Main support; and The fixing plate, in conjunction with the main support, forms the internal space of the main frame; and Multiple functional modules are fixed to the main frame; of the multiple functional modules, some of the functional modules are located in the internal space, and other functional modules are located between the main frame and the shell.

2. The projection device according to claim 1, characterized in that, The housing includes: An annular shell, wherein the main frame is fixed to the annular shell; A front shell, connected to the annular shell and covering the front opening of the annular shell; and The rear shell is connected to the annular shell and covers the rear opening of the annular shell; Of the plurality of functional modules, at least one functional module is located between the main frame and the annular shell; at least one functional module is located between the main frame and the front shell.

3. The projection device according to claim 2, characterized in that, A slide rail assembly is provided between the main frame and the annular shell, the slide rail assembly comprising: The first slide rail extends along the axial direction of the annular shell; The second slide rail is slidably engaged with the first slide rail; Wherein, the first slide rail is disposed on the main frame and the second slide rail is disposed on the annular shell; or, the first slide rail is disposed on the annular shell and the second slide rail is disposed on the main frame.

4. The projection device according to claim 3, characterized in that, The first slide rail is disposed on the main support; The main support includes: Base plate; The first side plate is connected to one side of the base plate; and The second side plate is connected to the other side of the bottom plate, and the arrangement direction of the second side plate and the first side plate is perpendicular to the axis of the annular shell; The first slide rail is provided in at least one of the base plate, the first side plate and the second side plate.

5. The projection device according to claim 2, characterized in that, The annular shell includes: Ring-shaped plastic shell; and An annular aluminum shell is fitted over the annular plastic shell.

6. The projection device according to claim 5, characterized in that, The plurality of functional modules includes a wireless module; the wireless module includes: The wireless board is fixed to the main bracket on the side facing the front shell. An adapter plate is fixed to the side of the main bracket facing the annular shell and is used to connect to an external antenna. Adapter cable, used to connect the wireless board and the adapter board; and The shielding cover is fixed to the side of the fixing plate away from the main support and is located between the annular shell and the wireless board.

7. The projection device according to any one of claims 1-6, characterized in that, The projection device also includes: A gimbal bracket, rotatably connected to the housing, is used to adjust the projection angle of the projection device; the gimbal bracket includes: Base; A support arm connects the base and the housing; and The first rotating shaft assembly rotatably connects the support arm and the housing.

8. The projection device according to claim 7, characterized in that, The first rotating shaft assembly includes: The first fixed arm is fixed to the support arm; The second fixing arm is fixed to the housing; A first rotating shaft passes through the first fixed arm and is connected to the second fixed arm; The first damping element is disposed between the first rotating shaft and the first fixed arm; or, it is disposed between the first fixed arm and the second fixed arm.

9. The projection device according to claim 7, characterized in that, The gimbal support also includes: The second rotating shaft assembly rotatably connects the support arm and the base.

10. The projection device according to claim 9, characterized in that, The second rotating shaft assembly includes: The first fixing part is fixed to the support arm; The second fixing part is fixed to the base; The second rotating shaft passes through the second fixing part and is connected to the first fixing part; The second damping element is disposed between the second rotating shaft and the second fixed part; or, it is disposed between the first fixed part and the second fixed part.

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