Projection device

Abstract

The application provides a projection device, which comprises a fixed shell, a rotating shell, a reflecting mirror and a rotating assembly. The rotating shell is sleeved on the opening end of the fixed shell, and the side of the rotating shell away from the fixed shell is provided with a projection lens. The reflecting mirror is at least partially located in the fixed shell and rotationally connected to the fixed shell. The rotating assembly is arranged on the outer wall of the fixed shell. When the rotating assembly is driven, the rotating shell, the projection lens and the reflecting mirror are simultaneously rotated relative to the fixed shell. Thus, the simultaneous rotation of the reflecting mirror and the projection lens can ensure that the light emitted by the display panel can still be reflected to the projection lens by the reflecting mirror, without causing loss of light. At the same time, the projection lens can be flexibly rotated relative to the fixed shell, so that the rotation angle and the off-axis rate of the projection lens can be flexibly adjusted according to the use scene, the scene adaptability of the projection optical machine is improved, the actual needs of users can be met, and the convenience of use is improved without the need for an additional support.

Description

Technical Field

[0001] This application relates to the field of projection equipment technology, and more particularly to a projection device. Background Technology

[0002] A projection device is a device that projects images or videos onto a screen. It can be connected to devices such as computers, game consoles, and televisions through various interfaces to play corresponding video signals. Projection devices are widely used in homes, offices, schools, and entertainment venues. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a projection device.

[0004] To achieve the above objectives, this application provides a projection device, comprising:

[0005] A fixed housing, including an open end, wherein a display panel is provided inside the fixed housing;

[0006] A reflector, at least partially located within the fixed housing and rotatably connected to the fixed housing;

[0007] A rotating shell is rotatably fitted onto the open end, and a projection lens is provided on the side of the rotating shell away from the fixed shell;

[0008] A rotating assembly is disposed on the outer wall of the fixed shell, with one end fixedly connected to the bottom of the rotating shell and the other end fixedly connected to the reflector. It is configured to drive the rotating shell, the projection lens and the reflector to rotate simultaneously relative to the fixed shell when driven.

[0009] Optionally, two rotating components are provided, and the fixed shell includes two outer walls arranged opposite to each other. Each outer wall is provided with a rotating component, and each rotating component is fixedly connected to the side wall of the reflector.

[0010] Optionally, the rotating assembly includes a connecting shaft, a connecting rod, and a fixed shaft. The top of the connecting shaft is fixedly connected to the bottom of the rotating housing. The end of the connecting shaft near the reflector is rotatably connected to the fixed housing. The end of the connecting shaft away from the reflector is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to one end of the fixed shaft. The other end of the fixed shaft is fixedly connected to the reflector.

[0011] Optionally, the lengths of the connecting shaft and the connecting rod need to meet the following conditions: Where L1 is the length of the connecting shaft, L2 is the length of the connecting rod, and θ is the angle between the optical axis of the projection lens and the first axis. The angle between the plane containing the reflector and the first axis, where the first axis is the central axis of the fixed shell.

[0012] Optionally, it also includes a fixing bracket, which is fixedly connected to at least the side wall of the reflector. The fixing bracket includes an extension end that extends out of the fixing shell and is fixedly connected to the fixing shaft, and the extension end is rotatably connected to the fixing shell.

[0013] Optionally, the angle between the optical axis of the projection lens and the first axis is θ, and the angle between the plane of the reflecting mirror and the first axis is θ. The first axis is the central axis of the fixed shell.

[0014] Optionally,

[0015] Optionally, θ is 0–110°, and the The range is 0 to 55°.

[0016] Optionally, it also includes a drive assembly, which includes a meshing drive gear and a driven gear, and a drive member connected to the drive gear, wherein the driven gear is fixedly connected to the end of the connecting shaft away from the connecting rod.

[0017] Optionally, both the driving gear and the driven gear are located within the fixed housing, and the driving member includes a drive shaft that passes through the fixed housing and is connected to the driving gear. The driving member is configured to drive the driving gear to rotate.

[0018] Optionally, the number of teeth of the driving gear is greater than the number of teeth of the driven gear.

[0019] Optionally, the ratio of the number of teeth of the driving gear to the number of teeth of the driven gear is 3:1 to 6:1.

[0020] Optionally, it also includes a light source assembly, which is located on the side of the mounting housing away from the projection lens, and the light emitted by the light source assembly is configured to be directed toward the display panel.

[0021] As described above, the projection device provided in this application includes a fixed housing, a rotating housing, a reflector, and a rotating assembly. The rotating housing is rotatably fitted onto the open end of the fixed housing, and a projection lens is located on the side of the rotating housing away from the fixed housing. The reflector is at least partially located inside the fixed housing and rotatably connected to it. The rotating assembly is located on the outer wall of the fixed housing. When driven, the rotating assembly causes the rotating housing, the projection lens, and the reflector to rotate simultaneously relative to the fixed housing. This simultaneous rotation of the reflector and the projection lens ensures that the reflector can still reflect the light emitted from the display panel to the projection lens without causing light loss. Simultaneously, the projection lens can rotate flexibly relative to the fixed housing, allowing the rotation angle and off-axis rate of the projection lens to be flexibly adjusted according to the usage scenario. This improves the scene adaptability of the projection optical engine, better meets the actual needs of users, and eliminates the need for an additional stand, thus improving ease of use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the first structure of the projection device according to an embodiment of this application;

[0024] Figure 2 This is a side view of a first structure of the projection device according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the first structure of the projection device according to an embodiment of this application, omitting the fixed shell and part of the rotating shell.

[0026] Figure 4 This is a schematic diagram of the equivalent principle of the rotating component of the projection device according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the second structure of the projection device according to an embodiment of this application;

[0028] Figure 6 This is a side view of a second structure of the projection device according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of a third structure of the projection device according to an embodiment of this application;

[0030] Figure 8 This is a side view of a third structure of the projection device according to an embodiment of this application;

[0031] Figure 9 This is a schematic diagram of the second structure of the projection device according to an embodiment of this application, omitting the fixed shell and part of the rotating shell.

[0032] In the diagram: 1. Fixed housing; 2. Rotating housing; 3. Projection lens; 4. Rotating assembly; 41. Connecting shaft; 42. Connecting rod; 43. Fixed shaft; 5. Light source assembly; 6. Base; 7. Reflector; 8. Display panel; 9. Fixed bracket; 91. Extended end; 10. Drive assembly; 101. Drive gear; 102. Driven gear; 11. Connecting rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Currently, the main projection devices on the market include CRT (Cathode Ray Tube) projectors, LCD (Liquid Crystal Display) projectors, and DLP (Digital Light Processing) projectors. LCD projectors mainly include single-LCD projectors and triple-LCD projectors. Single-LCD projectors have a simple structure and low cost, making them suitable for low- and middle-income consumers, and therefore have considerable growth potential.

[0036] Among existing projection devices, 90° projection devices and 0° projection devices are common. A 90° projection device refers to a 90° angle between the optical axis of the projection lens and the optical axis of the optical path, while a 0° projection device refers to a 0° angle between the optical axis of the projection lens and the optical axis of the optical path. These two are the projection solutions used in most products on the market. In addition, some products set the angle between the lens and the optical path to between 39° and 41°, which can achieve an off-axis deviation of about 40°. However, the angle is still fixed and cannot be flexibly adjusted.

[0037] Because the angle of the projection lens of existing projection devices is fixed and cannot be flexibly adjusted, the projection device cannot automatically adjust the angle when matching the user's usage scenario. It can only be used with a bracket, and the installation position is relatively fixed, which cannot meet the installation requirements of specific projection scenarios.

[0038] Based on this, this application provides a projection device.

[0039] Figure 1 This is a schematic diagram of the first structure of the projection device according to an embodiment of this application; Figure 2 This is a side view of a first structure of the projection device according to an embodiment of this application; Figure 3 This is a schematic diagram of the first structure of the projection device according to an embodiment of this application, omitting the fixed shell and part of the rotating shell.

[0040] See Figure 1 , Figure 2 and Figure 3 As shown, the projection device includes:

[0041] A fixed housing 1 includes an open end, and a display panel 8 is provided inside the fixed housing 1;

[0042] The reflector 7 is at least partially located inside the fixed housing 1 and rotatably connected to the fixed housing 1;

[0043] A rotating shell 2 is rotatably fitted onto the open end, and a projection lens 3 is provided on the side of the rotating shell 2 away from the fixed shell 1;

[0044] The rotating component 4 is located on the outer wall of the fixed shell 1. One end is fixedly connected to the bottom of the rotating shell 2, and the other end is fixedly connected to the reflector 7. It is configured to drive the rotating shell 2, the projection lens 3 and the reflector 7 to rotate simultaneously relative to the fixed shell 1 when driven.

[0045] Specifically, the top of the mounting housing 1 has an opening, which is the open end. The mounting housing 1 has a display panel 8 inside, which can be a liquid crystal display panel.

[0046] The reflector 7 is at least partially located inside the fixed shell 1 and rotatably connected to the fixed shell 1, so that the reflector 7 can rotate relative to the fixed shell 1.

[0047] The reflector 7 can be partially or completely located inside the fixed housing 1, as long as it ensures that the light emitted from the display panel 8 can be reflected by the reflector 7 and that the reflected light can enter the projection lens 3.

[0048] The rotating shell 2 is rotatably fitted onto the opening end. In this way, on the one hand, the rotating shell 2 can rotate relative to the fixed shell 1 to achieve flexible adjustment of the rotation angle of the projection lens 3; on the other hand, the setting of the opening end allows the light reflected by the reflector 7 to enter the projection lens 3 without obstruction, ensuring the projection effect.

[0049] The rotating assembly 4 is disposed on the outer wall of the fixed shell 1. One end of the rotating assembly 4 is fixedly connected to the bottom of the rotating shell 2. Thus, the rotation of the rotating assembly 4 will drive the rotation of the rotating shell 2, which in turn will drive the projection lens 3. Therefore, the rotation of the rotating assembly 4 can drive the rotation of the projection lens 3. The other end of the rotating assembly 4 is fixedly connected to the reflector 7, so the rotation of the rotating assembly 4 can also drive the reflection mirror 7 to rotate.

[0050] In this way, when the rotating component 4 is driven, its rotation causes the projection lens 3 and the reflector 7 to rotate simultaneously relative to the fixed housing 1. This simultaneous rotation of the reflector 7 and the projection lens 3 ensures that the reflector 7 can still reflect the light emitted from the display panel 8 to the projection lens 3, preventing light loss. Simultaneously, the projection lens 3 can rotate flexibly relative to the fixed housing 1, allowing its rotation angle and off-axis rate to be adjusted according to the usage scenario. This improves the adaptability of the projection engine to different scenarios, better meeting the actual needs of users, and eliminates the need for an additional bracket, thus enhancing ease of use.

[0051] In some embodiments, see continue to see Figure 3 As shown, there are two rotating components 4. The fixed shell 1 includes two outer walls that are arranged opposite each other. Each outer wall is provided with a rotating component 4. Each rotating component 4 is fixedly connected to the side wall of the reflector 7.

[0052] Specifically, the two rotating components 4 are arranged opposite to each other and are respectively set on the two opposite outer walls of the fixed shell 1. In this way, the two rotating components 4 are fixedly connected to one side wall of the reflector 7. The two rotating components 4 can fix the reflector 7 from both sides, ensuring the stability of the connection between the rotating components 4 and the reflector 7. This ensures that the entire reflector 7 can rotate smoothly during the process of the rotating components 4 driving the reflector 7 to rotate, without tilting or shaking, and without one side rotating while the other does not.

[0053] In some embodiments, see continue to see Figure 3 As shown, the rotating assembly 4 includes a connecting shaft 41, a connecting rod 42, and a fixed shaft 43. The top of the connecting shaft 41 is fixedly connected to the bottom of the rotating shell 2. The end of the connecting shaft 41 near the reflector 7 is rotatably connected to the fixed shell 1. The end of the connecting shaft 41 away from the reflector 7 is hinged to one end of the connecting rod 42. The other end of the connecting rod 42 is hinged to one end of the fixed shaft 43. The other end of the fixed shaft 43 is fixedly connected to the reflector 7.

[0054] Specifically, the top of the connecting shaft 41 is fixedly connected to the bottom of the rotating shell 2. For example, a portion of the top of the connecting shaft 41 can be fixedly connected to the bottom of the rotating shell 2, or the entire top of the connecting shaft 41 can be fixedly connected to the bottom of the rotating shell 2. As long as the connecting shaft 41 and the rotating shell 2 are fixed, the rotation of the connecting shaft 41 can drive the fixed shell 1 to rotate synchronously.

[0055] For example, see Figure 3 As shown, a connecting rod 11 is fixed to the inner wall of the rotating shell 2. The bottom of the connecting rod 11 is fixed to the top of the connecting shaft 41. Thus, the connecting rod 11 is fixedly connected to both the rotating shell 2 and the connecting shaft 41, thereby achieving a fixed connection between the rotating shell 2 and the connecting shaft 41.

[0056] The end of the connecting shaft 41 near the reflector 7 is rotatably connected to the fixed shell 1. That is, the end of the connecting shaft 41 near the reflector 7 can rotate relative to the fixed shell 1, but cannot move in position. The rotatable connection between the end of the connecting shaft 41 and the fixed shell 1 allows the connecting shaft 41 to rotate relative to the fixed shell 1, and also realizes the rotatable connection between the rotating shell 2 and the fixed shell 1.

[0057] The end of the connecting shaft 41 away from the reflector 7 is hinged to one end of the connecting rod 42, so that the end of the connecting rod 42 connected to the connecting shaft 41 can rotate or move relative to each other.

[0058] The other end of the connecting rod 42 is hinged to one end of the fixed shaft 43, so that the end of the connecting rod 42 connected to the fixed shaft 43 can rotate or move relative to each other.

[0059] The other end of the fixed shaft 43 is fixedly connected to the reflector 7, and the reflector 7 is rotatably connected to the fixed shell 1. Thus, the end of the fixed shaft 43 connected to the reflector 7 can rotate relative to the fixed shell 1, but cannot move in position.

[0060] Thus, for the connecting shaft 41, connecting rod 42 and fixed shaft 43 in the rotating assembly 4, one end of the connecting shaft 41 can only rotate but cannot move in position, while both ends of the connecting rod 42 can rotate and move in position, and one end of the fixed shaft 43 can only rotate but cannot move in position.

[0061] For example, see Figure 4 The equivalent principle diagram is shown. Figure 4 In the diagram, point A can be considered equivalent to the end of connecting shaft 41 closest to reflector 7; point B can be considered equivalent to the end of connecting shaft 41 furthest from reflector 7 (i.e., the end where connecting rod 42 connects to connecting shaft 41); point C can be considered equivalent to the end where connecting rod 42 connects to fixed shaft 43 (i.e., the end where fixed shaft 43 connects to connecting rod 42); and point D can be considered equivalent to the end where fixed shaft 43 connects to reflector. Figure 4 As can be seen, points A and D can only rotate around themselves and cannot move in space. Points B and C can both rotate and move in space. AB corresponds to connecting axis 41, BC corresponds to link 42, and CD corresponds to fixed axis 43.

[0062] The projection lens 3 and the connecting shaft 41 rotate together, meaning the projection lens 3 rotates with the rotation of AB. The reflector 7 and the fixed axis move together, meaning the reflector 7 rotates with the rotation of CD.

[0063] In specific implementation, when the end of the connecting shaft 41 of the rotating assembly 4 near the reflector 7 (i.e. Figure 4 When point A in the diagram is driven by an external force to rotate, the rotation of this end causes the projection lens 3, which is fixedly connected to it, to rotate. At the same time, the rotation of this end causes the connecting rod 42 (i.e., Figure 4 As shown in BC, the link 42 moves and / or rotates, and the movement and rotation of the link 42 will drive the free end of the fixed shaft 43 (i.e., the link 42 is hinged to the link 42) to move and / or rotate. Figure 4 As shown in C, the free end of the fixed shaft 43 rotates and / or moves, while the rotation and / or movement of its fixed end, i.e., the end fixedly connected to the reflector 7, will drive its fixed end (i.e., the end that is fixedly connected to the reflector 7). Figure 4As shown in D, the end rotates, which in turn drives the mirror 7 connected to it to rotate. In this way, the rotating shell drives the mirror 7 to rotate synchronously, ensuring that even after the rotating shell rotates, the light emitted from the display panel 8 can still be reflected by the mirror 7, and the reflected light can still enter the projection lens 3, ensuring the projection effect.

[0064] In this application, in order to ensure the imaging effect, it is necessary to control the rotation angle of the projection lens 3 and the rotation angle of the reflector 7.

[0065] Based on this, in some embodiments, the angle between the optical axis of the projection lens 3 and the first axis is θ, the angle between the plane where the reflector 7 is located and the first axis is φ, θ>φ, and the first axis is the central axis of the fixed shell 1.

[0066] Specifically, only by controlling θ>φ can we ensure that even after the rotating shell is rotated, the light emitted from the display panel 8 can still be reflected by the reflector 7, and the reflected light can still enter the projection lens 3 to ensure the projection effect.

[0067] Furthermore, θ = 1 / 2φ, that is, the angle between the optical axis of the projection lens 3 and the first axis is twice the angle between the plane where the reflector 7 is located and the first axis, which can ensure the best imaging effect.

[0068] For example, the angle θ between the optical axis of the projection lens 3 and the first axis is 0 to 110°, the angle φ between the plane of the reflector 7 and the first axis is 0 to 55°, and the first axis is the central axis of the fixed shell 1, i.e., the vertical direction.

[0069] Specifically, when the angle θ between the optical axis of the projection lens 3 and the first axis is 0 to 110°, the rotation angle of the projection lens 3 is large enough to meet the angle requirements of almost all usage scenarios. If θ is greater than 110°, the angle between the optical axis of the projection lens 3 and the first axis is too large, and in actual use, the projection lens 3 cannot rotate such a large angle at all. If it rotates such a large angle, the projection engine will not be able to perform projection work normally.

[0070] Furthermore, corresponding to the angle θ between the optical axis of the projection lens 3 and the first axis, the angle φ between the plane where the reflector 7 is located and the first axis is 0 to 55°, so as to ensure that the rotation angle of the reflector 7 is appropriate and facilitates the imaging of the projection device.

[0071] Exemplary, in some embodiments, see Figure 1 and Figure 2As shown, in this state, the optical axis of the projection lens 3 (i.e., Figure 2 (as shown in Q) and the vertical direction (i.e. Figure 2 The angle between the reflector 7 and the vertical direction is 45°, and the angle between the reflector 7 and the vertical direction is 22.5°.

[0072] Figure 5 This is a schematic diagram of the second structure of the projection device according to an embodiment of this application; Figure 6 This is a side view of a second structure of the projection device according to an embodiment of this application.

[0073] See Figure 5 and Figure 6 As shown, when Figure 1 and Figure 2 The basic architectural changes are as follows Figure 5 and Figure 6 When the optical path is straight, the angle between the lens optical axis and the vertical direction becomes 0°, and the angle between the reflector 7 and the vertical direction also becomes 0°.

[0074] Figure 7 This is a schematic diagram of a third structure of the projection device according to an embodiment of this application; Figure 8 This is a side view of a third structure of the projection device according to an embodiment of this application.

[0075] See Figure 7 and Figure 8 As shown, when Figure 1 and Figure 2 The basic architectural changes are as follows Figure 7 and Figure 8 When the optical path is folded, the angle between the lens optical axis and the vertical direction becomes 90°, and the angle between the reflector 7 and the vertical direction becomes 45°.

[0076] In this way, the projection device can switch freely between straight optical path, folded optical path and intermediate state.

[0077] In this embodiment, the 45° angle, 0° angle, and 90° angle are used as examples. The actual angle between the lens optical axis and the vertical direction can be switched and stopped arbitrarily between 0 and 110°. The angle between the reflector 7 and the vertical direction can be switched and stopped arbitrarily between 0 and 55° with the lens. The angle of the reflector 7 is 1 / 2 of the change in the lens angle.

[0078] In some embodiments, the lengths of the connecting shaft 41 and the connecting rod 42 need to meet the following conditions: Wherein, L1 is the length of the connecting shaft 41, L2 is the length of the connecting rod 42, θ is the angle between the optical axis of the projection lens 3 and the first axis, φ is the angle between the plane where the reflector 7 is located and the first axis, and the first axis is the central axis of the fixed shell 1.

[0079] Specifically, since the positions of the connecting shaft 41 and the rotating shell 2 are already determined, and the positions of the fixed shaft 43 and the reflector 7 are also already determined, the dimensions of the entire rotating assembly 4 can be determined as long as the lengths of the connecting shaft 41 and the connecting rod 42 meet this condition. This ensures that the rotating assembly 4 can simultaneously drive the rotating shell 2 and the reflector 7 to rotate, and also ensures that the dimensions of the connecting shaft 41, the connecting rod 42, and the fixed shaft 43 meet the design requirements.

[0080] In some embodiments, see continue to see Figure 3 The projection device further includes a fixed bracket 9, which is fixedly connected to at least the side wall of the reflector 7. The fixed bracket 9 includes an extension end 91, which extends out of the fixed shell 1 and is fixedly connected to the fixed shaft 43, and the extension end 91 is rotatably connected to the fixed shell 1.

[0081] Specifically, the fixing bracket 9 is fixedly connected to at least the side wall of the reflector 7. For example, the fixing bracket 9 may be connected to only the two side walls of the reflector 7, or it may be connected to both side walls and the bottom wall of the reflector 7 at the same time. The fixing bracket 9 may be connected to the entire side wall of the reflector 7, or it may be connected to a part of the side wall of the reflector 7. There is no limitation here, and it is designed according to actual needs.

[0082] The fixed bracket 9 includes an extension end 91, which extends out of the fixed shell 1 and is fixedly connected to the fixed shaft 43. The extension end 91 is also rotatably connected to the fixed shell 1. In this way, both the fixed connection between the reflector 7 and the fixed shaft 43 and the rotatable connection between the reflector 7, the fixed shaft 43 and the fixed shell 1 can be realized. When the fixed shaft 43 rotates relative to the fixed shell 1 under the drive of the connecting rod 42, it can drive the reflector 7 to rotate relative to the fixed shell 1 together.

[0083] Figure 9 This is a schematic diagram of the second structure of the projection device according to an embodiment of this application, omitting the fixed shell 1 and part of the rotating shell 2.

[0084] In some embodiments, see Figure 9 As shown, the projection device also includes a drive assembly 10, which includes a meshing drive gear 101 and a driven gear 102, and a drive member connected to the drive gear 101. The driven gear 102 is fixedly connected to the end of the connecting shaft 41 away from the connecting rod 42.

[0085] Specifically, the driving component can be a drive motor, servo motor, stepper motor, belt motor, etc., as long as it can achieve the function of driving the drive gear 101.

[0086] Driven gear 102 is fixedly connected to the end of connecting shaft 41 away from connecting rod 42. Driven gear 101 is not connected to connecting shaft 41 or reflector 7. Driven gear 101 rotates under the drive of the drive member. Then, the rotating drive gear 101 drives the driven gear 102 that meshes with it to rotate. The rotation of driven gear 102 drives the connecting shaft 41 that is fixed to it to rotate. The rotating connecting shaft 41 drives the connecting rod 42 to rotate and / or move in position. The rotating and / or moving connecting rod 42 drives the fixed end of fixed shaft 43 (i.e., the end that is not connected to reflector 7) to rotate and / or move. The rotating and / or moving fixed end of fixed shaft 43 drives the free end of fixed shaft 43 (i.e., the end that is connected to reflector 7) to rotate. The rotating free end drives the reflector 7 that is fixed to it to rotate. In this way, the rotating shell 2, projection lens 3 and reflector 7 are rotated synchronously, ensuring that projection can still be achieved after the projection lens 3 rotates.

[0087] In some embodiments, both the driving gear 101 and the driven gear 102 are located within the fixed housing 1. The driving member includes a driving shaft that passes through the fixed housing 1 and is connected to the driving gear 101. The driving member is configured to drive the driving gear 101 to rotate.

[0088] Specifically, the driving gear 101 and the driven gear 102 are both located inside the fixed housing 1, while the main body of the driving component is located outside the fixed housing 1. This facilitates external control of the fixed housing 1 by relevant personnel and also allows the driving gear 101 and the driven gear 102 to drive the rotating shaft to rotate.

[0089] For example, the driving component includes a driving shaft that passes through the fixed housing 1 and connects to the drive gear 101 to ensure the stability of the connection. The driving component is configured to drive the drive gear 101 to rotate via the driving shaft. The rotating drive gear 101 drives the driven gear 102 meshing with it to rotate. The rotation of the driven gear 102 drives the connecting shaft 41 fixed to it to rotate. The rotating connecting shaft 41 drives the connecting rod 42 to rotate and / or move in position. The rotating and / or moving connecting rod 42 drives the fixed end of the fixed shaft 43 (i.e., the end not connected to the reflector 7) to rotate and / or move. The rotating and / or moving fixed end of the fixed shaft 43 drives the free end of the fixed shaft 43 (i.e., the end connected to the reflector 7) to rotate. The rotating free end drives the reflector 7 fixed to it to rotate. In this way, the rotating housing 2, the projection lens 3 and the reflector 7 are rotated synchronously, ensuring that projection can still be achieved after the projection lens 3 rotates.

[0090] In some embodiments, the number of teeth of the driving gear 101 is greater than the number of teeth of the driven gear 102.

[0091] Specifically, the number of teeth on the driving gear 101 is greater than the number of teeth on the driven gear 102. Thus, when the driving gear 101 and the driven gear 102 rotate simultaneously, the driving gear 101, with its larger number of teeth, rotates slower, while the driven gear 102, with its smaller number of teeth, rotates faster. In actual operation, the driving component only needs to drive the driving gear 101 to rotate a very small angle, which in turn can drive the driven gear 102 to rotate a large angle, thereby driving the projection lens 3 to rotate a large angle. This allows for effective rotation control with low driving costs.

[0092] In some embodiments, the ratio of the number of teeth of the driving gear 101 to the number of teeth of the driven gear 102 is 3:1 to 6:1.

[0093] Specifically, after numerous experimental verifications, it was finally determined that when the ratio of the number of teeth of the driving gear 101 to the number of teeth of the driven gear 102 is 3:1 to 6:1, the ratio of the number of teeth of the driving gear 101 to the driven gear 102 is appropriate, which is convenient for both driving and for the effective rotation of the rotating shell 2.

[0094] When the ratio of the number of teeth of the driving gear 101 to the number of teeth of the driven gear 102 is less than 3:1, the difference in the number of teeth between the driving gear 101 and the driven gear 102 is not significant, and the rotation angles of the two are also not significantly different. Therefore, when driving the rotating housing 2 to rotate at a specific angle, it is also necessary to drive the driving gear 101 to rotate at a larger angle, resulting in a higher driving cost.

[0095] When the ratio of the number of teeth of the driving gear 101 to the number of teeth of the driven gear 102 is greater than 6:1, the difference in the number of teeth between the driving gear 101 and the driven gear 102 is too large, and the rotation angles of the two are also too different. Therefore, when the driving component drives the driving gear 101 to rotate a very small angle, the rotating shell 2 will rotate a very large angle, which is not conducive to the precise control of the rotation angle of the rotating shell 2.

[0096] In some embodiments, see continue to see Figure 1 As shown, the projection device also includes a light source assembly 5, which is located on the side of the fixed housing 1 away from the projection lens 3, and the light emitted by the light source assembly 5 is configured to be directed toward the display panel 8.

[0097] Specifically, the light source assembly includes a light-emitting element (not shown in the figure). The light emitted by the light-emitting element is directed towards the display panel, and then the light emitted from the display panel is directed towards a reflector. The reflector reflects the light, and the reflected light enters the projection lens and exits from the projection lens. Alternatively, the light source assembly may also include a light-emitting element base (not shown in the figure) and a condenser lens (not shown in the figure). The light-emitting element is located on the light-emitting element base, and the condenser lens is located on the light-emitting side of the light-emitting element. The condenser lens is configured to focus or shape the light emitted by the light-emitting element, and the light that illuminates the display panel is light that has been focused or shaped by the condenser lens. Optionally, the condenser lens can be a plano-convex lens, with the plane of the plano-convex lens facing the light-emitting element. Of course, other lens structures can also be used for the condenser lens.

[0098] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0100] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A projection device, comprising: A fixed housing, including an open end, wherein a display panel is provided inside the fixed housing; A reflector, at least partially located within the fixed housing and rotatably connected to the fixed housing; A rotating shell is rotatably fitted onto the open end, and a projection lens is provided on the side of the rotating shell away from the fixed shell; A rotating assembly is disposed on the outer wall of the fixed shell, with one end fixedly connected to the bottom of the rotating shell and the other end fixedly connected to the reflector. It is configured to drive the rotating shell, the projection lens and the reflector to rotate simultaneously relative to the fixed shell when driven. The rotating assembly includes a connecting shaft, a connecting rod, and a fixed shaft. The top of the connecting shaft is fixedly connected to the bottom of the rotating housing. The end of the connecting shaft near the reflector is rotatably connected to the fixed housing. The end of the connecting shaft away from the reflector is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to one end of the fixed shaft. The other end of the fixed shaft is fixedly connected to the reflector.

2. The projection device according to claim 1, characterized in that, Two rotating components are provided. The fixed shell includes two outer walls that are arranged opposite each other. Each outer wall is provided with a rotating component. Each rotating component is fixedly connected to the side wall of the reflector.

3. The projection device according to claim 1, characterized in that, The lengths of the connecting shaft and the connecting rod must meet the following conditions: Where L1 is the length of the connecting shaft, L2 is the length of the connecting rod, θ is the angle between the optical axis of the projection lens and the first axis, φ is the angle between the plane where the reflector is located and the first axis, and the first axis is the central axis of the fixed shell.

4. The projection device according to claim 1, characterized in that, It also includes a fixed bracket, which is fixedly connected to at least the side wall of the reflector. The fixed bracket includes an extended end that extends out of the fixed shell and is fixedly connected to the fixed shaft, and the extended end is rotatably connected to the fixed shell.

5. The projection device according to claim 1, characterized in that, The angle between the optical axis of the projection lens and the first axis is θ, and the angle between the plane of the reflector and the first axis is φ, where θ>φ, and the first axis is the central axis of the fixed shell.

6. The projection device according to claim 5, characterized in that, θ = 1 / 2φ.

7. The projection device according to claim 5, characterized in that, θ is 0~110°, and φ is 0~55°.

8. The projection device according to claim 1, characterized in that, It also includes a drive assembly, which includes a meshing drive gear and a driven gear, and a drive member connected to the drive gear, wherein the driven gear is fixedly connected to the end of the connecting shaft away from the connecting rod.

9. The projection device according to claim 8, characterized in that, Both the driving gear and the driven gear are located inside the fixed housing. The driving component includes a drive shaft that passes through the fixed housing and is connected to the driving gear. The driving component is configured to drive the driving gear to rotate.

10. The projection device according to claim 8, characterized in that, The number of teeth on the driving gear is greater than the number of teeth on the driven gear.

11. The projection device according to claim 8, characterized in that, The ratio of the number of teeth of the driving gear to the number of teeth of the driven gear is 3:1 to 6:

1.

12. The projection device according to claim 1, characterized in that, It also includes a light source assembly, which is located on the side of the fixed housing away from the projection lens, and the light emitted by the light source assembly is configured to be directed toward the display panel.

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