A projection device

Abstract

The application relates to the projection field and discloses a projection device which comprises a host computer and a holder; the host computer comprises a shell, a main circuit board and a first adapter wire; the main circuit board is fixed in the shell; the first adapter wire is electrically connected with the main circuit board; the holder comprises an outer shell, an angle adjusting mechanism, an adapter circuit board, a second adapter wire and a mobile power supply; the angle adjusting mechanism is connected between the shell and the outer shell and used for adjusting the projection angle of the host computer; the adapter circuit board is fixed in the outer shell; one end of the second adapter wire is electrically connected with the adapter circuit board, and the other end penetrates through the angle adjusting mechanism and is electrically connected with the first adapter wire; the mobile power supply is detachably installed in the outer shell and is electrically connected with the adapter circuit board. The projection device provided by the embodiment of the application can not only adjust the projection angle of the host computer, but also supply power for the host computer through the mobile power supply arranged in the holder, so that more use scenarios are met.

Description

Technical Field

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

[0002] Projection devices such as smart micro-projectors face power supply requirements limited by environmental conditions in key user scenarios like "portable while traveling," which places higher demands on gimbal functionality. In addition to supporting multi-directional projection angle adjustment, the gimbal must also be able to house a portable power bank to power the projector, and the portable power bank should be detachable.

[0003] However, most gimbals in the industry can only adjust the projection angle and lack power supply, which limits the application scenarios of micro-projectors.

[0004] Therefore, solving the problems of power supply integration and expanding the design of gimbal functionality are the main challenges of current technology. Utility Model Content

[0005] This application discloses a projection device that, while allowing for projection angle adjustment, also has a power supply function to be applicable to more usage scenarios.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A projection device, comprising:

[0008] The host, the host comprising:

[0009] case;

[0010] The main circuit board is fixed inside the housing; and

[0011] The first adapter cable is electrically connected to the main circuit board;

[0012] The gimbal includes:

[0013] shell;

[0014] An angle adjustment mechanism is connected between the housing and the outer shell, and is used to adjust the projection angle of the host.

[0015] The adapter circuit board is fixed inside the housing;

[0016] A second adapter cable, one end of which is electrically connected to the adapter circuit board, and the other end passing through the angle adjustment mechanism and electrically connected to the first adapter cable; and

[0017] The power bank is detachably installed inside the housing and electrically connected to the adapter circuit board.

[0018] The projection device provided in this application includes a main unit and a pan-tilt unit, with the main unit mounted on the pan-tilt unit. The main unit includes a housing, a main circuit board, and a first adapter cable. The main circuit board is fixed inside the housing, and the first adapter cable is electrically connected to the main circuit board, enabling a structural electrical connection between the main circuit board and the outside of the housing. The pan-tilt unit includes a housing, an angle adjustment mechanism, a second adapter cable for the adapter circuit board, and a power supply. The housing of the main unit is mounted to the housing of the pan-tilt unit via the angle adjustment mechanism, allowing the main unit to move relative to the pan-tilt unit to adjust its projection angle. The adapter circuit board is fixed inside the housing, and the second adapter cable is electrically connected to the adapter circuit board, with its other end passing through the angle adjustment mechanism and electrically connected to the first adapter cable, thus achieving an electrical connection between the main circuit board and the adapter circuit board. The power supply is located inside the housing and electrically connected to the adapter circuit board, allowing the power supply to power the main circuit board via the adapter circuit board. The power supply is detachably connected to the housing for easy replacement.

[0019] Therefore, the projection device provided in this application embodiment can both adjust the projection angle of the host and power the host by setting a mobile power supply on the gimbal, thereby meeting more usage scenarios.

[0020] In some embodiments, the angle adjustment mechanism includes:

[0021] A universal connector has a cable routing channel; the cable routing channel is used to avoid the second adapter cable; along the extending direction of the cable routing channel, the universal connector includes:

[0022] A rotating shaft is rotatably mounted on the housing so that the housing can rotate relative to the rotating shaft about the axis of the rotating shaft; and

[0023] A universal joint is connected to the rotating shaft; the surface of the universal joint is spherical; the universal joint is rotatably mounted on the housing so that the universal joint can rotate relative to the housing along the spherical surface.

[0024] In some embodiments, the angle adjustment mechanism further includes a bracket; the bracket is detachably connected to the housing;

[0025] The rotating shaft is rotatably mounted on the bracket.

[0026] In some embodiments, an axial limiting component is provided between the rotating shaft and the bracket;

[0027] The axial limiting component includes:

[0028] A central limiting ring is disposed on the bracket;

[0029] A first limiting ring is fixed to the outer side of the rotating shaft; the outer diameter of the first limiting ring is larger than the inner diameter of the central limiting ring; and

[0030] The second limiting ring is detachably sleeved on the outside of the rotating shaft; along the axial direction of the rotating shaft, the first limiting ring is located between the second limiting ring and the universal joint; the outer diameter of the second limiting ring is larger than the inner diameter of the central limiting ring;

[0031] The first limiting ring, the second limiting ring, and the rotating shaft portion are located on the peripheral side of the first limiting ring and the second limiting ring to form a limiting groove; the limiting groove cooperates with the central limiting ring to axially limit the rotating shaft portion and the bracket.

[0032] In some embodiments, the peripheral side of the rotating shaft is provided with an annular groove for engaging the second limiting ring.

[0033] In some embodiments, the outer casing is provided with an annular structure protruding toward the interior of the gimbal, and the inner diameter of the annular structure is larger than the outer diameter of the universal joint.

[0034] The outer casing is provided with a first through hole communicating with the annular structure; the radial dimension of the first through hole is smaller than the outer diameter of the universal joint and larger than the outer diameter of the rotating shaft.

[0035] The annular structure is connected to an end cap on the side opposite to the first through hole. The end cap is provided with a second through hole that communicates with the wiring channel. The radial dimension of the second through hole is smaller than the outer diameter of the universal joint and larger than the inner diameter of the wiring channel.

[0036] The end cap and the annular structure cooperate to form a mounting groove for mounting the universal joint;

[0037] A damping element is provided in the mounting groove; the damping element is located between the side wall of the mounting groove and the spherical surface.

[0038] In some embodiments, the damping element includes:

[0039] A first annular elastic element is disposed at the connection between the annular structure and the outer shell, and the inner wall of the first annular elastic element is formed with a first spherical surface for mating with the spherical surface; along the direction from the first through hole to the second through hole, the radial dimension of the previous cross-section on the first spherical surface is greater than the radial dimension of the subsequent cross-section; and

[0040] A second annular elastic element is disposed at the connection between the annular structure and the end cap, and the inner wall of the second annular elastic element is formed with a second spherical surface for spherical mating; along the direction from the first through hole to the second through hole, the radial dimension of the first cross section on the second spherical surface is smaller than the radial dimension of the second cross section.

[0041] In some embodiments, the end cap is provided with a pressing portion protruding toward the first through hole;

[0042] The end cap can move axially relative to the annular structure along the rotating shaft to adjust the force between the extrusion part and the second annular elastic member.

[0043] In some embodiments, the housing includes a bottom wall; the bottom wall is detachably connected to the bracket;

[0044] The host also includes a first connecting circuit board, which is fixed to the bottom wall and connected to the first adapter cable; the first connecting circuit board is provided with a first electrical connection terminal protruding from the bottom wall toward the outside of the housing;

[0045] The bracket is provided with a second electrical connection terminal for corresponding connection to the first electrical connection terminal; the second electrical connection terminal is electrically connected to the second adapter cable.

[0046] In some embodiments, the power bank is provided with a power display screen for displaying the power level;

[0047] The outer casing is provided with a transparent window that cooperates with the power display screen to display the power level of the power bank;

[0048] And / or, the housing is provided with a charging interface that is electrically connected to the adapter circuit board;

[0049] And / or, the housing includes:

[0050] Bottom shell; and

[0051] A battery cover is detachably attached to the bottom shell and confines the power source within the bottom shell. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application;

[0053] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0054] Figure 3 An exploded view of a projection device provided in an embodiment of this application;

[0055] Figure 4 A top view of a projection device provided in an embodiment of this application;

[0056] Figure 5 for Figure 4 Mid-section view;

[0057] Figure 6 This application provides a schematic diagram of the structure of a pan-tilt unit in a projection device.

[0058] Figure 7 An exploded view of a gimbal in a projection device provided in an embodiment of this application;

[0059] Figure 8 An assembly diagram of an angle adjustment mechanism and an upper shell in a projection device provided in an embodiment of this application;

[0060] Figure 9 for Figure 8 Top view;

[0061] Figure 10 for Figure 9 CC section view;

[0062] Figure 11 for Figure 9 DD section view;

[0063] Figure 12 An enlarged view of a universal connector in a projection device provided in an embodiment of this application;

[0064] Figure 13 An exploded view of a universal connector in a projection device provided in an embodiment of this application;

[0065] Figure 14 A cross-sectional view of a first annular elastic element in a projection device provided in an embodiment of this application;

[0066] Figure 15 A cross-sectional view of a second annular elastic element in a projection device provided in an embodiment of this application;

[0067] Figure 16 A cross-sectional view of another projection device provided in an embodiment of this application;

[0068] Figure 17 for Figure 16 Enlarged view of the connection between the first and second adapter cables;

[0069] Figure 18 This is a schematic diagram of one side structure of a projection device provided in an embodiment of this application;

[0070] Figure 19 This is a schematic diagram of the other side of a projection device provided in an embodiment of this application;

[0071] Figure 20 This application provides a schematic diagram of the structure of a hidden battery cover for a projection device.

[0072] Icons: 1-Projection device; 2-Projection screen; 100-Main unit; 200-Gimbal; 110-House; 120-Main circuit board; 130-First adapter cable; 140-First connecting circuit board; 111-Bottom wall; 210-Outer shell; 220-Angle adjustment mechanism; 230-Adapter circuit board; 240-Second adapter cable; 250-Power bank; 260-Second connecting circuit board; 270-See window; 280-Charging port; 211-Top shell; 212-Bottom shell; 213-Battery cover; 221-Universal connector; 222-Bracket; 223-Damping component; 224 - Conductive ring; 251- Power display screen; 252- Power connection cable; 261- Third adapter cable; 2611- Connection terminal; 2211- Wiring channel; 2212- Rotating shaft; 2213- Universal joint; 2221- Screw hole; 2222- Center limiting ring; 22121- First limiting ring; 22122- Second limiting ring; 22123- Annular groove; 2111- Annular structure; 2112- First through hole; 2113- End cap; 2114- Second through hole; 2231- First annular elastic element; 2232- Second annular elastic element; 21131- Extrusion part. Detailed Implementation

[0073] 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.

[0074] 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.

[0075] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application.

[0076] like Figure 1As 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.

[0077] 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 A top view of a projection device provided in an embodiment of this application; Figure 5 for Figure 4 Mid-section view.

[0078] like Figures 2 to 5 As shown, this application embodiment provides a projection device, including a host 100 and a gimbal 200; the host 100 includes a housing 110, a main circuit board 120, and a first adapter cable 130; the main circuit board 120 is fixed inside the housing 110; the first adapter cable 130 is electrically connected to the main circuit board 120; the gimbal 200 includes a housing 210, an angle adjustment mechanism 220, an adapter circuit board 230, a second adapter cable 240, and a power supply 250; the angle adjustment mechanism 220 is connected between the housing 110 and the housing 210, and is used to adjust the projection angle of the host 100; the adapter circuit board 230 is fixed inside the housing 210; one end of the second adapter cable 240 is electrically connected to the adapter circuit board 230, and the other end passes through the angle adjustment mechanism 220 and is electrically connected to the first adapter cable 130; the power supply 250 is detachably installed inside the housing 210 and is electrically connected to the adapter circuit board 230.

[0079] The projection device provided in this application embodiment includes a host 100 and a gimbal 200, with the host 100 mounted on the gimbal 200. The host 100 is responsible for the core projection function, while the gimbal 200 is responsible for support, angle adjustment, and power supply. The host 100 includes a housing 110, a main circuit board 120, and a first adapter cable 130. The main circuit board 120 is fixed inside the housing 110, and the first adapter cable 130 is electrically connected to the main circuit board 120 to achieve structural electrical connection between the main circuit board 120 and the outside of the housing 110. The gimbal 200 includes a housing 210, an angle adjustment mechanism 220, an adapter circuit board 230, a second adapter cable 240, and a power supply 250. The housing 210 of the host 100 is mounted on the housing 210 of the gimbal 200 via the angle adjustment mechanism 220, allowing the host 100 to rotate or tilt relative to the gimbal 200, thereby flexibly adjusting the projection angle to adapt to different usage scenarios. The adapter circuit board 230 is fixed inside the housing 210. The second adapter cable 240 is electrically connected to the adapter circuit board 230, and its other end passes through the angle adjustment mechanism 220 and is electrically connected to the first adapter cable 130, thereby realizing the electrical connection between the main circuit board 120 and the adapter circuit board 230, and ensuring stable power and signal transmission during angle adjustment. The power bank 250 is disposed inside the housing 210 and electrically connected to the adapter circuit board 230, so that the power bank 250 supplies power to the main circuit board 120 through the adapter circuit board 230. The power bank 250 provides additional power support and is suitable for use in environments without external power. The power bank 250 is detachably connected to the housing 210, making it easy to replace and more convenient for long-term outdoor use.

[0080] Therefore, the projection device provided in this application embodiment can both adjust the projection angle of the host 100 and power the host 100 by setting a mobile power supply 250 in the gimbal 200, thereby meeting more usage scenarios.

[0081] In some embodiments, such as Figure 5 As shown, the angle adjustment mechanism 220 includes a universal connector 221; the universal connector 221 has a wiring channel 2211; the wiring channel 2211 is used to avoid the second adapter cable 240; along the extension direction of the wiring channel 2211, the universal connector 221 includes a pivot portion 2212 and a universal portion 2213; the pivot portion 2212 is rotatably mounted on the housing 110 so that the housing 110 can rotate relative to the pivot portion 2212 about the axis of the pivot portion 2212; the universal portion 2213 is connected to the pivot portion 2212; the surface of the universal portion 2213 is spherical; the universal portion 2213 is rotatably mounted on the outer casing 210 so that the universal portion 2213 can rotate relative to the outer casing 210 along the spherical surface.

[0082] In one embodiment, such as Figure 5As shown, the universal connector 221 employs a universal joint 2213 with a spherical structure, allowing the main unit 100 to rotate and tilt freely in multiple directions, achieving multi-degree-of-freedom angle adjustment. A rotatable connection is formed between the pivot 2212 and the housing 110, allowing the main unit 100 to rotate around the axis of the pivot 2212. For example, as... Figure 4 As shown, the main unit 100 can rotate 360° along direction B around the axis of the pivot 2212. The universal connector 221 has a wiring channel 2211 inside to accommodate the second adapter cable 240. The wiring channel 2211 protects the second adapter cable 240 from external environmental influences during angle adjustment, preventing cable breakage or poor contact and improving device reliability. Furthermore, users can adjust the angle without manually adjusting the wiring, making operation more convenient and enhancing the user experience. Integrating the wiring channel 2211 with the angle adjustment mechanism reduces the need for additional wiring structures and improves the integration and aesthetics of the projection device.

[0083] In one embodiment, the outer shell 210 of the gimbal 200 includes an upper shell 211 and a bottom shell 212, a universal connector 221 is rotatably mounted on the upper shell 211, and a power bank 250 is installed inside the bottom shell 212.

[0084] The main unit 100 can rotate relative to the pan-tilt unit 200 via the pivot 2212, such as swinging left and right or rotating 360°. Simultaneously, it can tilt up and down via the universal joint 2213, enabling flexible adjustment of the main unit 100 in two-dimensional or three-dimensional space. This allows users to easily adjust the projected image at various angles to adapt to different scenarios. The angle adjustment mechanism 220 is integrated between the main unit 100 and the pan-tilt unit 200, providing not only mechanical support and angle adjustment but also managing the path of circuit transmission.

[0085] The angle adjustment mechanism 220 in the projection device provided in this application embodiment effectively solves the problem of easy damage to the circuit when adjusting the angle of traditional projection devices through the innovative design of the hollow universal connector 221, while realizing flexible adjustment with a high degree of freedom; it not only improves the ease of operation and user experience of the device, but also enhances the stability and reliability of the device in complex usage scenarios.

[0086] In one embodiment, such as Figure 5As shown, one end of the first adapter cable 130 is electrically connected to the main circuit board 120, and the other end forms a first connection terminal; one end of the second adapter cable 240 is electrically connected to the adapter circuit board 230, and the other end forms a second connection terminal. The first connection terminal and the second connection terminal are electrically connected. The electrical connection method of the first connection terminal and the second connection terminal can be varied. For example, both the first connection terminal and the second connection terminal can be metal wires, connected into a single structure by winding, binding, or other methods to achieve electrical connection. Alternatively, the first connection terminal and the second connection terminal can be a plug and socket mating structure, where the first connection terminal and the second connection terminal are plugged in to achieve electrical connection.

[0087] It is understood that the rotating shaft 2212 of the angle adjustment mechanism 220 can be directly rotatably connected to the housing 110 of the main unit 100, or it can be rotatably connected to the housing 110 through other structural components. Rotatably connecting to the housing 110 through other structural components can be understood as the other structural components being relatively fixed to the housing 110, with the rotating shaft 2212 rotatably mounted on the other structural components. For example, the other structural component is the bracket 222.

[0088] Figure 6 This application provides a schematic diagram of the structure of a pan-tilt unit in a projection device. Figure 7 An exploded view of a gimbal in a projection device provided in an embodiment of this application; Figure 8 An assembly diagram of an angle adjustment mechanism and an upper shell in a projection device provided in an embodiment of this application; Figure 9 for Figure 8 Top view; Figure 10 for Figure 9 CC section view; Figure 11 for Figure 9 DD section view; Figure 12 An enlarged view of a universal connector in a projection device provided in an embodiment of this application.

[0089] In some embodiments, such as Figures 5-7 As shown, the angle adjustment mechanism 220 also includes a bracket 222; the bracket 222 is detachably connected to the housing 110; and the rotating shaft 2212 is rotatably mounted on the bracket 222.

[0090] In one embodiment, such as Figure 5 and Figure 6 As shown, the housing 110 of the main unit 100 has a square structure, and the bracket 222 has a U-shaped structure, which facilitates a close fit with the shape of the housing 110. The bracket 222 is detachably connected to the housing 110. In a specific implementation, the bracket 222 and the housing 110 can be fixed together by screws. For example, the bracket 222 has multiple screw holes 2221, and the screws pass through the screw holes 2221 and are threadedly connected to the housing 110.

[0091] The bracket 222 serves as an intermediate structure connecting the main unit 100 housing 110 and the rotating shaft 2212. It employs a detachable connection method, facilitating quick installation or removal by the user as needed, enhancing the portability and modularity of the device, and making it particularly suitable for flexible configuration in different usage scenarios. The rotating shaft 2212 supports the main unit 100 via the bracket 222, allowing the main unit 100 to rotate and adjust around the axis of the rotating shaft 2212.

[0092] It is understandable that the main unit 100 and the pan-tilt unit 200 can be detachably connected via the bracket 222. To ensure that the main unit 100 can independently complete projection when the main unit 100 and the pan-tilt unit 200 are disassembled into two independent modules, the main unit 100 is equipped with a power connection cable 252 or a power connection interface, such as a power connection interface for connecting to AC power. Meanwhile, the first adapter cable 130 and the second adapter cable 240 can be connected using a plug-in or other easily detachable connection method.

[0093] In some embodiments, such as Figures 8-12 As shown, an axial limiting assembly is provided between the rotating shaft portion 2212 and the bracket 222; the axial limiting assembly includes a central limiting ring 2222, a first limiting ring 22121, and a second limiting ring 22122. The central limiting ring 2222 is disposed on the bracket 222; the first limiting ring 22121 is fixed to the outer side of the rotating shaft portion 2212; the outer diameter of the first limiting ring 22121 is larger than the inner diameter of the central limiting ring 2222; the second limiting ring 22122 is detachably sleeved on the outer side of the rotating shaft portion 2212; along the axial direction of the rotating shaft portion 2212, the first limiting ring 22121 is located between the second limiting ring 22122 and the universal joint 2213; the outer diameter of the second limiting ring 22122 is larger than the inner diameter of the central limiting ring 2222.

[0094] The first limiting ring 22121, the second limiting ring 22122 and the rotating shaft 2212 are located on the circumferential side between the first limiting ring 22121 and the second limiting ring 22122 to form a limiting groove; the limiting groove cooperates with the central limiting ring 2222 to axially limit the rotating shaft 2212 and the bracket 222.

[0095] like Figures 10-12As shown, a limiting groove is formed between the first limiting ring 22121 and the detachable second limiting ring 22122 on the rotating shaft portion 2212. This limiting groove cooperates with the central limiting ring 2222 fixed on the bracket 222 to limit the axial displacement of the rotating shaft portion 2212 and prevent it from axially shifting or falling off. The outer diameter of the first limiting ring 22121 is larger than the inner diameter of the central limiting ring 2222, ensuring that it cannot pass through the central limiting ring 2222, thus achieving unilateral limiting. The second limiting ring 22122 also has a structure with a larger outer diameter than the central limiting ring 2222, serving as the limiting ring on the other side, and its detachable design facilitates assembly and maintenance.

[0096] In one embodiment, such as Figure 12 As shown, when the universal connector 221 is assembled with the bracket 222, the universal connector 221 is inserted from the side of the bracket 222 away from the main unit 100, i.e., below the bracket 222. When the universal connector 221 is inserted into the bracket 222, the second limiting ring 22122 is not assembled onto the universal connector 221. The rotating shaft portion 2212 is inserted upwards from below the bracket 222 into the internal through hole of the central limiting ring 2222. Because the outer diameter of the first limiting ring 22121 is larger than the inner diameter of the central limiting ring 2222, the first limiting ring 22121 cannot continue upwards into the through hole of the central limiting ring 2222, thus achieving axial limiting of the lower end of the universal connector 221. When the first limiting ring 22121 contacts the central limiting ring 2222, the second limiting ring 22122 is inserted into the rotating shaft portion 2212, protruding above the central limiting ring 2222. Since the outer diameter of the first limiting ring 22121 is larger than the inner diameter of the center limiting ring 2222, the second limiting ring 22122 cannot move downward and enter the through hole of the center limiting ring 2222, thereby achieving axial limiting of the upper end of the universal connector 221.

[0097] The axial limiting component effectively prevents axial movement of the hinge 2212 during rotation, improving the stability and image clarity of the projection device during use. The axial limiting component also prevents the hinge 2212 from loosening or detaching due to vibration, impact, or other reasons, extending the device's lifespan. The detachable second limiting ring 22122 design allows for quick installation or removal of the hinge 2212 from the bracket 222, reducing assembly difficulty and improving production efficiency and ease of maintenance. Furthermore, stable axial limiting facilitates finer angle adjustments, avoiding adjustment errors caused by component movement.

[0098] There are several options for the detachable connection between the second limiting ring 22122 and the rotating shaft portion 2212. For example, the second limiting ring 22122 and the rotating shaft portion 2212 are connected by threads; in a specific implementation, the rotating shaft portion 2212 has external threads, and the second limiting ring 22122 has internal threads that mate with the external threads on the rotating shaft portion 2212. Alternatively, the second limiting ring 22122 and the rotating shaft portion 2212 can be snapped together.

[0099] Figure 13 This is an exploded view of a universal connector in a projection device provided in an embodiment of this application.

[0100] In some embodiments, such as Figure 13 As shown, the circumferential side of the rotating shaft 2212 is provided with an annular groove 22123 for engaging the second limiting ring 22122.

[0101] In one embodiment, the second limiting ring 22122 is engaged with the rotating shaft portion 2212. The peripheral side of the rotating shaft portion 2212 is provided with an annular groove 22123 for engaging the second limiting ring 22122, providing a precise positioning and mounting base for the second limiting ring 22122. The annular groove 22123 has a certain depth and width to ensure that the second limiting ring 22122 is firmly embedded and operates stably. The second limiting ring 22122 is engaged in the annular groove 22123 through elasticity or interference fit, enabling quick assembly and disassembly. For example, the second limiting ring 22122 is a retaining spring. The engagement of the second limiting ring 22122 with the rotating shaft portion 2212 eliminates the need for additional fasteners such as screws, simplifying the structure and reducing manufacturing and maintenance costs.

[0102] In some embodiments, such as Figures 10-12 As shown, the outer shell 210 has an annular structure 2111 protruding towards the inside of the gimbal 200. The inner diameter of the annular structure 2111 is larger than the outer diameter of the universal joint 2213. The outer shell 210 has a first through hole 2112 communicating with the annular structure 2111. The radial dimension of the first through hole 2112 is smaller than the outer diameter of the universal joint 2213 but larger than the outer diameter of the pivot 2212. An end cap 2113 is connected to the side of the annular structure 2111 away from the first through hole 2112. The end cap 2113 has a second through hole 2114 communicating with the wiring channel 2211. The radial dimension of the second through hole 2114 is smaller than the outer diameter of the universal joint 2213 but larger than the inner diameter of the wiring channel 2211. The end cap 2113 and the annular structure 2111 cooperate to form a mounting groove for mounting the universal joint 2213. A damping element 223 is provided in the mounting groove. The damping element 223 is located between the side wall of the mounting groove and the spherical surface.

[0103] In one embodiment, such as Figure 12As shown, the outer casing 210 has an annular structure 2111 protruding towards the inside of the gimbal 200. Its inner diameter is larger than the outer diameter of the universal joint 2213, providing installation space for the universal joint 2213. The annular structure 2111 and the end cap 2113 together form a mounting groove for accommodating the universal joint 2213. A first through-hole 2112 connects to the annular structure 2111. Its size is smaller than the outer diameter of the universal joint 2213 but larger than the outer diameter of the pivot 2212, ensuring that only the pivot 2212 can pass through, preventing the universal joint 2213 from detaching. The end cap 2113 is connected to the side of the annular structure 2111 opposite to the first through-hole 2112, and a second through-hole 2114 on it allows the cable routing channel 2211 to pass through. The second through-hole 2114 is smaller than the outer diameter of the universal joint 2213 but larger than the inner diameter of the cable routing channel 2211, achieving both limiting and cable routing functions. A damping element 223 is provided inside the mounting slot, located between the side wall and the spherical surface of the universal joint 2213. The damping element 223 can be made of elastic or frictional material to improve the feel and stability of the universal joint 2213 during adjustment. The presence of the damping element 223 increases the resistance felt when the universal joint 2213 rotates, making it less prone to displacement due to gravity or vibration during adjustment.

[0104] The projection device provided in this application embodiment achieves stable support and precise positioning of the universal joint 2213 through the coordinated design of the annular structure 2111 of the outer shell 210, the end cap 2113, and the damping component 223. This not only improves the operating feel and stability of the device but also effectively solves the safety hazards and wiring problems existing in traditional structures. The overall structure is compact and highly practical, reflecting a high degree of unity between mechanical design in terms of functionality, safety, and user experience.

[0105] Figure 14 A cross-sectional view of a first annular elastic element in a projection device provided in an embodiment of this application; Figure 15 This is a cross-sectional view of a second annular elastic element in a projection device provided in an embodiment of this application.

[0106] In some embodiments, such as Figure 14 and Figure 15 As shown, the damping element 223 includes:

[0107] A first annular elastic member 2231 is disposed at the connection between the annular structure 2111 and the outer shell 210, and the inner wall of the first annular elastic member 2231 is formed with a first pseudo-spherical surface for mating with a spherical surface; along the direction from the first through hole 2112 to the second through hole 2114, the radial dimension of the previous section on the first pseudo-spherical surface is greater than the radial dimension of the subsequent section; and

[0108] The second annular elastic member 2232 is disposed at the connection between the annular structure 2111 and the end cap 2113, and the inner wall of the second annular elastic member 2232 is formed with a second pseudo-spherical surface for spherical fit; along the direction from the first through hole 2112 to the second through hole 2114, the radial dimension of the first section of the second pseudo-spherical surface is smaller than the radial dimension of the second section.

[0109] In one embodiment, such as Figure 12 and Figure 14 As shown, the first annular elastic element 2231 is disposed at the connection between the annular structure 2111 and the outer shell 210, and is used to provide axial and radial buffering forces. Figure 14 As shown, the inner wall of the first annular elastic member 2231 is provided with a first spherical surface, the shape of which matches the spherical surface of the universal joint 2213, enhancing the contact area and friction. Along the direction from the first through-hole 2112 to the second through-hole 2114, the radial dimension of the preceding section is larger than the radial dimension of the following section, forming a gradually expanding conical spherical structure, which helps to achieve progressive resistance control. Figure 12 and Figure 15 As shown, the second annular elastic element 2232 is disposed at the connection between the annular structure 2111 and the end cap 2113, and also adopts an annular structure 2111 to adapt to the overall layout. Figure 15 As shown, the inner wall of the second annular elastic element 2232 is provided with a second spherical surface, which fits tightly with the spherical surface of the universal joint 2213 to enhance rotational stability. Along the direction from the first through hole 2112 to the second through hole 2114, the radial dimension of the previous section is smaller than the radial dimension of the subsequent section, forming a gradually converging conical spherical surface structure, which forms a complementary damping characteristic with the first spherical surface.

[0110] like Figure 12 As shown, the first and second spherical surfaces are respectively disposed at both ends of the mounting groove, forming a surrounding contact area around the spherical surface of the universal joint 2213. The two surfaces have opposite taper directions, which allows the universal joint 2213 to obtain asymmetrical but balanced damping feedback when adjusted at different angles, thus improving the operating feel.

[0111] The first annular elastic element 2231 and the second annular elastic element 2232 are preferably made of materials with high elasticity and wear resistance, such as silicone, rubber or elastic polymers.

[0112] For example, the first annular elastic element 2231 and the second annular elastic element 2232 are both made of silicone. The silicone and the universal joint 2213 are designed to have an interference of more than 0.5mm. The universal joint 2213 is pressed down from above and below to provide damping force.

[0113] The embodiments of this application allow for adjustments to material hardness or spherical curvature to achieve different damping levels depending on the application scenario. The damping component 223 is an independent assembly, facilitating replacement and maintenance, and is suitable for customized configurations under different loads or user needs.

[0114] The conical, spherical design of the universal joint 2213 results in varying degrees of resistance at different tilt angles, improving adjustment precision. The converging front and expanding rear structure ensures easy initial rotation, with resistance increasing as the angle approaches its limit, preventing accidental activation. The double spherical structure provides uniform and controllable friction, resulting in smooth and responsive rotation, avoiding stiffness or looseness. The damping element 223 can be replaced depending on the equipment type or operating environment to accommodate the adjustment needs of the universal joint 2213 for different weights or angle ranges.

[0115] In some embodiments, such as Figure 12 As shown, the end cap 2113 is provided with a pressing part 21131 that protrudes toward the first through hole 2112;

[0116] The end cap 2113 can move relative to the annular structure 2111 along the axial direction of the rotating shaft portion 2212 to adjust the force between the pressing portion 21131 and the second annular elastic member 2232.

[0117] In one embodiment, such as Figure 12 As shown, the end cap 2113 has a pressing portion 21131 protruding towards the first through hole 2112, used to apply pressure to the second annular elastic member 2232. The shape and size of the pressing portion 21131 match the second annular elastic member 2232 to ensure uniform force application. For example, the pressing portion 21131 is an annular structure 2111. In specific implementations, the pressing portion 21131 can be an integral structure with the end cap 2113, or it can be a separate structure. The pressing portion 21131 can be installed on the end cap 2113, or it can be placed only inside the end cap 2113, and is limited by the second annular elastic member 2232 and the universal connector 221. For example, the pressing portion 21131 is a rigid ring, such as a metal ring, placed inside the end cap 2113.

[0118] The end cap 2113 can move relative to the annular structure 2111 along the axial direction of the rotating shaft 2212. This adjustable connection is typically achieved using a sliding fit or a threaded adjustment structure. By adjusting the position of the end cap 2113, the contact depth between the pressing part 21131 and the second annular elastic element 2232 is changed, thereby adjusting the pressure on the elastic element. The pressure change directly affects the damping magnitude, enabling personalized adjustment.

[0119] In one embodiment, such as Figure 12 As shown, the end cap 2113 is provided with an internal thread, and the annular structure 2111 is provided with an external thread that mates with the internal thread of the end cap 2113.

[0120] In another embodiment, the annular structure 2111 is provided with an internal thread, and the end cap 2113 is provided with an external thread that mates with the internal thread of the annular structure 2111. In this embodiment, it is not necessary to provide other structural components as the pressing part 21131, and the side wall of the end cap 2113 can act as the pressing part 21131 to abut against the second annular elastic member 2232.

[0121] The first annular elastic element 2231 and the second annular elastic element 2232 are respectively disposed at both ends of the mounting groove. The damping of the second annular elastic element 2232 can be adjusted by the displacement of the end cap 2113, making the overall damping distribution more flexible and controllable. Users can manually adjust the position of the end cap 2113 according to actual usage requirements, thereby adjusting the damping strength.

[0122] In the above embodiments, the electrical connection of the first adapter cable 130 and the second adapter cable 240 in the projection device is not necessarily related to the connection between the host 100 and the pan / tilt unit 200. Of course, the electrical connection of the first adapter cable 130 and the second adapter cable 240 can also be achieved by relying on the connection between the host 100 and the pan / tilt unit 200.

[0123] Figure 16 A cross-sectional view of another projection device provided in an embodiment of this application; Figure 17 for Figure 16 Enlarged view of the connection between the first and second adapter cables;

[0124] In other embodiments, such as Figure 16 and Figure 17 As shown, the housing 110 includes a bottom wall 111; the bottom wall 111 is detachably connected to the bracket 222; the main unit 100 also includes a first connecting circuit board 140, which is fixed to the bottom wall 111 and connected to the first adapter cable 130; the first connecting circuit board 140 is provided with a first electrical connection terminal protruding from the bottom wall 111 toward the outside of the housing 110; the bracket 222 is provided with a second electrical connection terminal for corresponding connection to the first connection terminal; the second electrical connection terminal is electrically connected to the second adapter cable 240.

[0125] In one embodiment, such as Figure 16 and Figure 17As shown, the housing 110 includes a bottom wall 111, which is detachably connected to the bracket 222 using methods such as screws or clips. A first connecting circuit board 140 is fixed to the bottom wall 111 and located within the housing 110. The first connecting circuit board 140 has a first electrical connection terminal, such as a pin, protruding from the outside of the housing 110. The bracket 222 has a second electrical connection terminal protruding from the outside of the gimbal 200. The second electrical connection terminal is electrically connected to the adapter circuit board 230 via a second adapter cable 240. When the main unit 100 is assembled with the gimbal 200, the housing 110 of the main unit 100 is in the assembly position relative to the bracket 222, and the first electrical connection terminal mates with the second electrical connection terminal. The first adapter cable 130 and the second adapter cable 240 form an electrical connection. The assembly position can be understood as the threaded hole on the housing 110 precisely aligning with the screw hole 2221 on the bracket 222.

[0126] The bracket 222 can also be provided with a limiting groove, which serves both as a guide and a limiting function to ensure reliable connection between the first connecting terminal and the second connecting terminal.

[0127] It should be noted that, Figure 16 and Figure 17 The diagram shows a second connecting circuit board 260 on the bracket 222, which has a second connecting terminal and is electrically connected to the second adapter cable 240. Alternatively, the bracket 222 may not have the second connecting circuit board 260; for example, the second connecting terminal may be directly embedded in the bracket 222. Exemplarily, the second connecting terminal and the bracket 222 are injection molded as a single unit.

[0128] like Figure 16 and Figure 17 As shown, to ensure that the rotating shaft 2212 of the universal connector 221 can rotate 360° relative to the bracket 222, a conductive ring 224 is provided on the outer side of the rotating shaft 2212. The second adapter wire 240 passes through the rotating shaft 2212 and is electrically connected to the conductive ring 224. Furthermore, a third adapter wire 261 is provided between the second connecting terminal and the conductive ring 224. One end of the third adapter wire 261 is electrically connected to the second connecting terminal, and the other end is a connecting terminal 2611. The connecting terminal 2611 passes through the central limiting ring 2222 and abuts against the conductive ring 224. In a specific implementation, the third adapter wire 261 can abut against the conductive ring 224 through a pin or a metal spring.

[0129] Figure 18 This is a schematic diagram of one side structure of a projection device provided in an embodiment of this application.

[0130] In some embodiments, such as Figure 18 As shown, and in combination Figure 17The assembly method of the universal joint 2213 and the upper shell 211 enables the main unit 100 shell to be tilted relative to the gimbal 200, with a tilt adjustment angle θ of 15°-25°.

[0131] Figure 19 This is a schematic diagram of the other side of a projection device provided in an embodiment of this application; Figure 20 This is a schematic diagram of the structure of a hidden battery cover for a projection device provided in an embodiment of this application.

[0132] In some embodiments, such as Figure 19 and Figure 20 As shown, the power bank 250 is equipped with a power display screen 251 for displaying the power level;

[0133] The outer casing 210 is provided with a transparent window 270 that cooperates with the power display screen 251 to display the power level of the power bank 250;

[0134] And / or, such as Figure 18 As shown, the housing 210 is provided with a charging interface 280 that is electrically connected to the adapter circuit board 230;

[0135] And / or, such as Figure 19 and Figure 20 As shown, the housing 210 includes a bottom housing 212 and a battery cover 213, the battery cover 213 being detachably connected to the bottom housing 212 and confining the power bank 250 within the bottom housing 212.

[0136] In one embodiment, such as Figure 20 As shown, the power bank 250 is equipped with a power display screen 251 for displaying the remaining power in real time. For example, the power display screen 251 can be an LED, LCD, or other low-power display module, supporting multi-level power indication. Figure 19 As shown, the outer casing 210 has a transparent window 270 corresponding to the position of the power display screen 251. The transparent window 270 can be made of transparent or semi-transparent material (such as PC, PMMA, etc.) to facilitate users to intuitively view the power information. Through the cooperation of the power display screen 251 and the transparent window 270, users can know the remaining power of the power bank 250 at any time; avoid sudden power outages due to insufficient power, and improve the convenience of use.

[0137] In one embodiment, such as Figure 18 As shown, the outer casing 210 is equipped with a charging interface 280 that is electrically connected to the adapter circuit board 230. Interface types include round plugs, USB-A, USB-C, Type-C, and Micro USB, meeting the charging needs of the power bank 250. The charging interface 280 allows for direct charging of the power bank 250 without disassembly.

[0138] In one embodiment, such as Figure 19 and Figure 20 As shown, the outer casing 210 includes a bottom casing 212 and a battery cover 213. The battery cover 213 is detachably connected to the bottom casing 212, securing the power bank 250 inside the bottom casing 212. The connection between the battery cover 213 and the bottom casing 212 can be a snap-fit, screw-type, or sliding locking structure. In specific implementations, the bottom casing 212 is provided with a positioning groove or limiting structure to securely limit the position of the power bank 250. The detachable battery cover 213 design facilitates the replacement of the power bank 250 or the repair of the internal circuitry, supporting rapid upgrades to battery capacity or replacement of damaged components.

[0139] In one specific implementation, the outer casing 210 includes an upper casing 211, a bottom casing 212, and a battery cover 213. An angle adjustment mechanism 220 is mounted on the upper casing 211. An adapter circuit board 230 is mounted from top to bottom, i.e., the adapter circuit board 230 is mounted on the bottom casing 212 from the side facing the upper casing 211; a power bank 250 is mounted from bottom to top, i.e., the power bank 250 is mounted on the bottom casing 212 from the side facing away from the upper casing 211. The bottom casing 212, in conjunction with the removable battery cover 213, enables the detachable assembly of the power bank. In the projection device provided in this application embodiment, the stacked design of the universal connector 221 and the internal structure of the gimbal 200 results in a gimbal 200 thickness of only 50mm, which is more than 15% thinner than a conventional gimbal 200.

[0140] In one embodiment, such as Figure 20 As shown, the power bank 250 is electrically connected to the adapter circuit board 230 via power connection cable 252252. In a specific implementation, the adapter circuit board 230 is provided with a connector for plugging into the power connection cable 252252.

[0141] In other embodiments, the gimbal 200 is also equipped with other functional modules such as speakers, and the functional modules are wired through the wiring channel 2211 of the universal connector 221.

[0142] 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 by include: The host, the host comprising: case; The main circuit board is fixed inside the housing; and The first adapter cable is electrically connected to the main circuit board; The gimbal includes: shell; An angle adjustment mechanism is connected between the housing and the outer shell, and is used to adjust the projection angle of the host. The adapter circuit board is fixed inside the housing; A second adapter cable, one end of which is electrically connected to the adapter circuit board, and the other end passing through the angle adjustment mechanism and electrically connected to the first adapter cable; and The power bank is detachably installed inside the housing and electrically connected to the adapter circuit board.

2. The projection device according to claim 1, characterized in that, The angle adjustment mechanism includes: A universal connector has a cable routing channel; the cable routing channel is used to avoid the second adapter cable; along the extending direction of the cable routing channel, the universal connector includes: A rotating shaft is rotatably mounted on the housing so that the housing can rotate relative to the rotating shaft about the axis of the rotating shaft; and A universal joint is connected to the rotating shaft; the surface of the universal joint is spherical; the universal joint is rotatably mounted on the housing so that the universal joint can rotate relative to the housing along the spherical surface.

3. The projection device according to claim 2, characterized in that, The angle adjustment mechanism further includes a bracket; the bracket is detachably connected to the housing; The rotating shaft is rotatably mounted on the bracket.

4. The projection device according to claim 3, characterized in that, An axial limiting component is provided between the rotating shaft and the bracket; The axial limiting component includes: A central limiting ring is disposed on the bracket; A first limiting ring is fixed to the outer side of the rotating shaft; the outer diameter of the first limiting ring is larger than the inner diameter of the central limiting ring; and The second limiting ring is detachably sleeved on the outside of the rotating shaft; along the axial direction of the rotating shaft, the first limiting ring is located between the second limiting ring and the universal joint; the outer diameter of the second limiting ring is larger than the inner diameter of the central limiting ring; The first limiting ring, the second limiting ring, and the rotating shaft portion are located on the peripheral side of the first limiting ring and the second limiting ring to form a limiting groove; the limiting groove cooperates with the central limiting ring to axially limit the rotating shaft portion and the bracket.

5. The projection device according to claim 4, characterized in that, The circumferential side of the rotating shaft is provided with an annular groove for engaging the second limiting ring.

6. The projection device according to claim 2, characterized in that, The outer shell is provided with a ring structure that protrudes toward the inside of the gimbal, and the inner diameter of the ring structure is larger than the outer diameter of the universal joint. The outer casing is provided with a first through hole communicating with the annular structure; the radial dimension of the first through hole is smaller than the outer diameter of the universal joint and larger than the outer diameter of the rotating shaft. The annular structure is connected to an end cap on the side opposite to the first through hole. The end cap is provided with a second through hole that communicates with the wiring channel. The radial dimension of the second through hole is smaller than the outer diameter of the universal joint and larger than the inner diameter of the wiring channel. The end cap and the annular structure cooperate to form a mounting groove for mounting the universal joint; A damping element is provided in the mounting groove; the damping element is located between the side wall of the mounting groove and the spherical surface.

7. The projection device according to claim 6, characterized in that, The damping element includes: A first annular elastic element is disposed at the connection between the annular structure and the outer shell, and the inner wall of the first annular elastic element is formed with a first spherical surface for mating with the spherical surface; along the direction from the first through hole to the second through hole, the radial dimension of the previous cross-section on the first spherical surface is greater than the radial dimension of the subsequent cross-section; and A second annular elastic element is disposed at the connection between the annular structure and the end cap, and the inner wall of the second annular elastic element is formed with a second spherical surface for spherical mating; along the direction from the first through hole to the second through hole, the radial dimension of the first cross section on the second spherical surface is smaller than the radial dimension of the second cross section.

8. The projection device according to claim 7, characterized in that, The end cap is provided with a pressing part that protrudes toward the first through hole; The end cap can move axially relative to the annular structure along the rotating shaft to adjust the force between the extrusion part and the second annular elastic member.

9. The projection device according to claim 3, characterized in that, The housing includes a bottom wall; the bottom wall is detachably connected to the bracket; The host also includes a first connecting circuit board, which is fixed to the bottom wall and connected to the first adapter cable; the first connecting circuit board is provided with a first electrical connection terminal protruding from the bottom wall toward the outside of the housing; The bracket is provided with a second electrical connection terminal for corresponding connection to the first electrical connection terminal; the second electrical connection terminal is electrically connected to the second adapter cable.

10. The projection device according to any one of claims 1-9, characterized in that, The power bank is equipped with a power display screen for showing the power level; The outer casing is provided with a transparent window that cooperates with the power display screen to display the power level of the power bank; And / or, the housing is provided with a charging interface that is electrically connected to the adapter circuit board; And / or, the housing includes: Bottom shell; and A battery cover is detachably attached to the bottom shell and confines the power source within the bottom shell.

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