Projection device

Abstract

The invention provides a projection device, which comprises a fixed shell, a rotating shell, a reflector and a rotating assembly, and is characterized in that the rotating shell rotatably sleeves the open end of the fixed shell, and a projection lens is arranged on one side, far away from the fixed shell, of the rotating shell; the reflector is at least partially located in the fixed shell and rotationally connected with the fixed shell, the rotating assembly is arranged on the outer wall of the fixed shell, and the rotating assembly drives the rotating shell, the projection lens and the reflector to rotate relative to the fixed shell at the same time when being driven; therefore, the reflector and the projection lens rotate at the same time, so that the reflector can still reflect the light emitted by the display panel to the projection lens, and the loss of the light is avoided. And meanwhile, the projection lens can flexibly rotate 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 a use scene, the scene adaptability of the projection light machine is improved, the actual demand of a user is favorably met, the projection light machine does not need to be matched with an additional bracket for use, and the use convenience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of projection equipment, and in particular to a projection device. Background Art

[0002] A projection device is a device that can project images or videos onto a screen. It can be connected to computers, game consoles, TVs and other devices through different interfaces to play the 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 the present application is to provide a projection device.

[0004] Based on the above objectives, the present application provides a projection device, including:

[0005] A fixed shell, comprising an open end, wherein a display panel is arranged inside the fixed shell;

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

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

[0008] The rotating assembly is arranged on the outer wall of the fixed shell, one end of which is fixedly connected to the bottom of the rotating shell, and the other end of which is fixedly connected to the reflector. When driven, the rotating shell, the projection lens and the reflector are driven to rotate relative to the fixed shell at the same time.

[0009] Optionally, two rotating assemblies are provided, the fixed shell includes two outer walls arranged opposite to each other, each of the outer walls is provided with a rotating assembly, and each of the rotating assemblies 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 shell, the end of the connecting shaft close to the reflector is rotatably connected to the fixed shell, 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, and the other end of the fixed shaft is fixedly connected to the reflector.

[0011] Optionally, the length of the connecting shaft and the length of the connecting rod need to satisfy the following conditions: Wherein, L1 is the length of the connecting shaft, L2 is the length of the connecting rod, θ is the angle between the lens optical axis of the projection lens and the first axis, 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.

[0012] Optionally, a fixed bracket is further included, which is fixedly connected to at least the side wall of the reflector, and the fixed bracket includes an extended end, which is fixedly connected to the fixed shaft after extending out of the fixed shell, and the extended end is rotatably connected to the fixed 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 where the reflector is located and the first axis is The first axis is a central axis of the fixed shell.

[0014] Optionally,

[0015] Optionally, the θ is 0 to 110°, 0~55°.

[0016] Optionally, a driving assembly is further included, the driving assembly includes a meshing driving gear and a driven gear, and a driving member connected to the driving gear, and the driven gear is fixedly connected to the end of the connecting shaft away from the connecting rod.

[0017] Optionally, the driving gear and the driven gear are both located in the fixed shell, the driving member includes a driving shaft, the driving shaft passes through the fixed shell and is connected to the driving gear, and 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, a light source assembly is further included, wherein the light source assembly is disposed on a side of the fixed housing away from the projection lens, and light emitted by the light source assembly is configured to be emitted toward the display panel.

[0021] As can be seen from the above, the projection device provided by the present application includes a fixed shell, a rotating shell, a reflector and a rotating assembly. The rotating shell is rotatably mounted on the open end of the fixed shell, and a projection lens is provided on the side of the rotating shell away from the fixed shell; the reflector is at least partially located in the fixed shell and the fixed shell is rotatably connected, and the rotating assembly is provided on the outer wall of the fixed shell. When the rotating assembly is driven, the rotating shell, the projection lens and the reflector are simultaneously rotated relative to the fixed shell. In this way, the simultaneous rotation of the reflector and the projection lens can ensure that the reflector can still reflect the light emitted by the display panel to the projection lens, and will not cause light loss. At the same time, the projection lens can be flexibly rotated relative to the fixed shell, so that the rotation angle and eccentricity of the projection lens can be flexibly adjusted according to the use scenario, thereby improving the scene adaptability of the projection optical machine, which is conducive to meeting the actual needs of users, and no additional bracket is required for use, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0024] Figure 2 A side view schematic diagram of a first structure of a projection device according to an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the first structure of the projection device of the embodiment of the present application after omitting the fixed shell and part of the rotating shell;

[0026] Figure 4 It is a schematic diagram of the equivalent principle of the rotating assembly of the projection device according to the embodiment of the present application;

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

[0028] Figure 6 A side view schematic diagram of a second structure of the projection device according to an embodiment of the present application;

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

[0030] Figure 8 A side view schematic diagram of a third structure of the projection device according to an embodiment of the present application;

[0031] Fig. 9 This is a schematic diagram of a second structure of the projection device according to an embodiment of the present application, in which the fixed shell and part of the rotating shell are omitted from the first structure.

[0032] In the figure: 1. fixed shell; 2. rotating shell; 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. extension end; 10. driving assembly; 101. driving gear; 102. driven gear; 11. connecting rod. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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] At present, the projection devices on the market mainly include CRT (Cathode Ray Tube) projection devices, LCD (Liquid Crystal Display) projection devices, and DLP (Digital Light Processing) projection devices. LCD projection devices mainly include single LCD projection devices, triple LCD projection devices, etc. Single LCD projection devices have simple structures and low costs, and are suitable for popularization to low- and middle-income consumer groups, so they have considerable room for growth.

[0036] Among existing projection devices, 90° projection devices and 0° projection devices are common. A 90° projection device refers to a device where the angle between the optical axis of the projection lens and the optical axis of the optical path is 90°, and a 0° projection device refers to a device where the angle between the optical axis of the projection lens and the optical axis of the optical path is 0°. These two types of projection schemes are used by 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 angle of about 40°. However, the angle is still fixed and cannot be adjusted flexibly.

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

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

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

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

[0041] A fixed shell 1, comprising an open end, wherein a display panel 8 is arranged inside the fixed shell 1;

[0042] A reflector 7, at least partly located in the fixed housing 1 and rotatably connected to the fixed housing 1;

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

[0044] The rotating assembly 4 is arranged on the outer wall of the fixed shell 1, one end of which is fixedly connected to the bottom of the rotating shell 2, and the other end of which is fixedly connected to the reflector 7. The rotating assembly 4 is configured to drive the rotating shell 2, the projection lens 3 and the reflector 7 to rotate relative to the fixed shell 1 at the same time when driven.

[0045] Specifically, an opening is provided at the top of the fixed shell 1, which is an open end. A display panel 8 is provided inside the fixed shell 1, and the display panel 8 can be a liquid crystal display panel.

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

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

[0048] The rotating shell 2 is rotatably mounted on the open end. In this way, on the one hand, the rotating shell 2 can be rotated 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 open end can allow the light reflected by the reflector 7 to enter the projection lens 3 without obstruction, thereby ensuring the projection effect.

[0049] The rotating assembly 4 is disposed on the outer wall of the fixed shell 1, and one end of the rotating assembly 4 is fixedly connected to the bottom of the rotating shell 2, so that the rotation of the rotating assembly 4 drives the rotation of the rotating shell 2, and the rotation of the rotating shell 2 drives the projection lens 3, so 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 that the rotation of the rotating assembly 4 can also drive the reflector 7 to rotate.

[0050] In this way, when the rotating assembly 4 is driven, the rotating assembly 4 can drive the projection lens 3 and the reflector 7 to rotate relative to the fixed shell 1 at the same time, so that the reflector 7 and the projection lens 3 rotate simultaneously to ensure that the reflector 7 can still reflect the light emitted by the display panel 8 to the projection lens 3 without causing light loss. At the same time, the projection lens 3 can be flexibly rotated relative to the fixed shell 1, so that the rotation angle and eccentricity of the projection lens 3 can be flexibly adjusted according to the use scene, thereby improving the scene adaptability of the projection optical machine, which is conducive to meeting the actual needs of users, and no additional bracket is required for use, thereby improving the convenience of use.

[0051] In some embodiments, see Figure 3 As shown, two rotating components 4 are provided, and the fixed shell 1 includes two outer walls arranged opposite to each other, each of the outer walls is provided with a rotating component 4 , and each of the rotating components 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 arranged on two oppositely arranged outer walls of the fixed shell 1. In this way, the two rotating components 4 are respectively fixedly connected to a 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, and further ensuring that in the process of the rotating component 4 driving the reflector 7 to rotate, the entire reflector 7 can rotate smoothly without deflection or shaking, and there will be no situation where one side rotates and the other side does not rotate.

[0053] In some embodiments, 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 close to 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, and 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, part 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, and the bottom of the connecting rod 11 is fixed to the top of the connecting shaft 41, so that the connecting rod 11 is fixedly connected to the rotating shell 2 and the connecting shaft 41 at the same time to achieve a fixed connection between the rotating shell 2 and the connecting shaft 41.

[0056] The end of the connecting shaft 41 close to the reflector 7 is rotatably connected to the fixed shell 1, that is, the end of the connecting shaft 41 close to the reflector 7 can rotate relative to the fixed shell 1, but cannot move in position. The rotatable connection of one end of the connecting shaft 41 with the fixed shell 1 allows the connecting shaft 41 to rotate relative to the fixed shell 1 on the one hand, and realizes the rotatable connection between the rotating shell 2 and the fixed shell 1 on the other hand.

[0057] One 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 portion 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, so that 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] In this way, for the connecting shaft 41, connecting rod 42 and fixed shaft 43 in the rotating component 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 can 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 schematic diagram is shown. Figure 4 In the figure, point A is equivalent to the end of the connecting shaft 41 close to the reflector 7, point B is equivalent to the end of the connecting shaft 41 away from the reflector 7 (that is, the end of the connecting rod 42 connected to the connecting shaft 41), point C is equivalent to the end of the connecting rod 42 connected to the fixed shaft 43 (that is, the end of the fixed shaft 43 connected to the connecting rod 42), and point D is equivalent to the end of the fixed shaft 43 connected to the reflector. Figure 4 As can be seen in the figure, points A and D can only rotate around the point and cannot move in space. Points B and C can both rotate and move in space. AB corresponds to the connecting axis 41, BC corresponds to the connecting rod 42, and CD corresponds to the fixed axis 43.

[0062] The projection lens 3 and the connecting shaft 41, that is, the projection lens 3 rotates with the rotation of AB, and the reflector 7 and the fixed shaft 41, that is, the reflector 7 rotates with the rotation of CD.

[0063] In a specific implementation, when the end of the connecting shaft 41 of the rotating assembly 4 close to the reflector 7 (i.e. Figure 4 When the end portion is driven by an external force to rotate, the rotation of the end portion drives the projection lens 3 fixedly connected thereto to rotate, and at the same time, the rotation of the end portion drives the connecting rod 42 (i.e. Figure 4 The movement and rotation of the connecting rod 42 will drive the free end of the fixed shaft 43 hinged to the connecting rod 42 (ie Figure 4 The rotation and / or movement of the free end of the fixed shaft 43 will drive the fixed end thereof, i.e., the end fixedly connected to the reflector 7 (i.e., Figure 4The rotation of the end portion will further drive the rotation of the reflector 7 connected thereto, so that the rotating shell can drive the reflector 7 to rotate synchronously, ensuring 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 then the reflected light can still enter the projection lens 3, thereby ensuring the projection effect.

[0064] In the present application, in order to ensure the imaging effect, the rotation angle of the projection lens 3 and the rotation angle of the reflection mirror 7 need to be controlled.

[0065] Based on this, in some embodiments, the angle between the lens 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, as long as θ>φ is controlled, it can be ensured 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 then the reflected light can still enter the projection lens 3, thereby ensuring the projection effect.

[0067] Furthermore, θ=1 / 2φ, that is, the angle between the lens 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] Exemplarily, the angle θ between the lens optical axis of the projection lens 3 and the first axis is 0-110°, the angle φ between the plane where the reflector 7 is located and the first axis is 0-55°, and the first axis is the central axis of the fixed shell 1, that is, the vertical direction.

[0069] Specifically, when the angle θ between the lens optical axis of the projection lens 3 and the first axis is 0-110°, the rotatable 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 lens optical axis of the projection lens 3 and the first axis is too large, and it is impossible for the projection lens 3 to rotate to such a large angle in actual use. If it rotates to such a large angle, the projection optical machine cannot perform projection work normally.

[0070] Furthermore, corresponding to the angle θ between the lens 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 0-55°, so as to ensure that the rotation angle of the reflector 7 is appropriate to facilitate imaging of the projection device.

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

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

[0073] See also Figure 5 and Figure 6 As shown, when Figure 1 and Figure 2 The basic structure changes to Figure 5 and Figure 6 When the straight optical path is adopted, 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 A schematic diagram of a third structure of the projection device according to an embodiment of the present application; Figure 8 It is a side view schematic diagram of a third structure of the projection device according to an embodiment of the present application.

[0075] See also Figure 7 and Figure 8 As shown, when Figure 1 and Figure 2 The basic structure changes to Figure 7 and Figure 8 When the folded optical path is used, 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 realize the purpose of switching between the straight optical path, the folded optical path and the intermediate state at will.

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

[0078] In some embodiments, the length of the connecting shaft 41 and the length of the connecting rod 42 need to satisfy 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 lens 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 position where the connecting shaft 41 is fixed to the rotating shell 2 and the position where the fixed shaft 43 is fixed to the reflector 7 has also been determined, the size of the entire rotating assembly 4 can be determined only when the length of the connecting shaft 41 and the length of the connecting rod 42 meet this condition. This ensures that the rotating assembly 4 can drive the rotating shell 2 and the reflector 7 to rotate at the same time, and that the sizes of the connecting shaft 41, the connecting rod 42 and the fixed shaft 43 meet the design requirements.

[0080] In some embodiments, see Figure 3 The projection device also 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 extended end 91, which is fixedly connected to the fixed shaft 43 after extending out of the fixed shell 1, and the extended end 91 is rotatably connected to the fixed shell 1.

[0081] Specifically, the fixed bracket 9 is fixedly connected to at least the side wall of the reflector 7. Exemplarily, the fixed bracket 9 can be connected to only the two side walls of the reflector 7, or can be connected to the two side walls and the bottom wall of the reflector 7 at the same time; the fixed bracket 9 can be connected to the entire side wall of the reflector 7, or can be connected to part of the side wall of the reflector 7. There is no limitation here and the design is based on actual needs.

[0082] The fixed bracket 9 includes an extended end 91, and after the extended end 91 extends out of the fixed shell 1, it is fixedly connected to the fixed shaft 43 and the extended end 91 is rotatably connected to the fixed shell 1. In this way, it is possible to achieve a fixed connection between the reflector 7 and the fixed shaft 43, and a rotatable connection between the reflector 7, the fixed shaft 43 and the fixed shell 1, so that when the fixed shaft 43 rotates relative to the fixed shell 1 driven by the connecting rod 42, the reflector 7 can be driven to rotate relative to the fixed shell 1.

[0083] Fig. 9 This is a schematic diagram of a second structure of the projection device according to an embodiment of the present application, in which the fixed shell 1 and part of the rotating shell 2 are omitted from the first structure.

[0084] In some embodiments, see Fig. 9 As shown, the projection device further includes a driving assembly 10, which includes a meshing driving gear 101 and a driven gear 102, and a driving member connected to the driving gear 101, and 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 member may be a driving motor, a servo motor, a stepping motor, a belt motor, etc., as long as it can realize the function of driving the driving gear 101 .

[0086] The driven gear 102 is fixedly connected to the end of the connecting shaft 41 away from the connecting rod 42, and the driving gear 101 is not connected to the connecting shaft 41 and the reflector 7. The driving gear 101 rotates under the drive of the driving member, and then the rotating driving gear 101 drives the driven gear 102 meshing with it to rotate, and the rotation of the driven gear 102 drives the connecting shaft 41 fixed thereto to rotate, and the rotating connecting shaft 41 drives the connecting rod 42 to rotate and / or move its position, and 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, and the fixed end of the rotating and / or moving fixed shaft 43 drives the free end of the fixed shaft 43 (i.e., the end connected to the reflector 7) to rotate, and the rotating free end drives the reflector 7 fixed thereto to rotate, thereby achieving the synchronous rotation of the rotating shell 2, the projection lens 3 and the reflector 7, ensuring that projection can still be achieved after the projection lens 3 rotates.

[0087] In some embodiments, the driving gear 101 and the driven gear 102 are both located in the fixed shell 1, and the driving member includes a driving shaft, which passes through the fixed shell 1 and is connected to the driving gear 101, and 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 in the fixed shell 1, and the main body of the driving member is located outside the fixed shell 1, so that it is convenient for relevant personnel to control the fixed shell 1 from the outside, and it is convenient for the driving gear 101 and the driven gear 102 to drive the rotating shaft to rotate.

[0089] Exemplarily, the driving member includes a driving shaft, which passes through the fixed shell 1 and is connected to the driving gear 101 to ensure the stability of the connection. The driving member is configured to drive the driving gear 101 to rotate through the driving shaft, and the rotating driving 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 thereto to rotate, and the rotating connecting shaft 41 drives the connecting rod 42 to rotate and / or move its position. The rotating and / or position-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, and the fixed end of the rotating and / or moving fixed shaft 43 drives the free end of the fixed shaft 43 (i.e., the end connected to the reflector 7) to rotate, and the rotating free end drives the reflector 7 fixed thereto to rotate, thereby achieving synchronous rotation of the rotating shell 2, the projection lens 3 and the reflector 7, 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 of the driving gear 101 is greater than the number of teeth of the driven gear 102. Thus, when the driving gear 101 and the driven gear 102 rotate simultaneously, the driving gear 101 with a larger number of teeth rotates slowly, and the driven gear 102 with a smaller number of teeth rotates quickly. Thus, in actual operation, the driving member only needs to drive the driving gear 101 to rotate a very small angle, and the driving gear 101 can drive the driven gear 102 to rotate a large angle, and further can drive the projection lens 3 to rotate a large angle. Thus, effective rotation control can be achieved under the premise of low driving cost.

[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 driving and 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 number of teeth of the driving gear 101 and the driven gear 102 is not much different, and the rotation angles of the two are also not much different. Therefore, when driving the rotating shell 2 to rotate a specific angle, it is also necessary to drive the driving gear 101 to rotate 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 number of teeth of the driving gear 101 and the driven gear 102 differ too much, and the rotation angles of the two differ too much. Therefore, when the driving member drives the driving gear 101 to rotate a small angle, the rotating shell 2 will rotate a large angle, which is not conducive to the precise control of the rotation angle of the rotating shell 2.

[0096] In some embodiments, see Figure 1 As shown, the projection device further includes a light source assembly 5 , which is disposed on a 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 emitted toward the display panel 8 .

[0097] Specifically, the light source assembly includes a light-emitting element (not shown in the figure), and the light emitted by the light-emitting element is directed to the display panel, and then the light emitted from the display panel is directed to the reflector. After the reflector reflects the light, the reflected light enters the projection lens and is emitted from the projection lens. In addition, the light source assembly may also include a light-emitting element base (not shown in the figure) and a focusing lens (not shown in the figure). The light-emitting element is located on the light-emitting element base, and the focusing lens is located on the light-emitting side of the light-emitting element. The focusing lens is configured to converge or shape the light emitted by the light-emitting element, and the light irradiated to the display panel is light converged or shaped by the focusing lens. Optionally, the focusing lens may adopt a plano-convex lens, and the plane of the plano-convex lens faces the light-emitting element. Of course, the focusing lens may also adopt other lens structures.

[0098] It should be noted that the above describes some embodiments of the present 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0099] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

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

Claims

1. A projection device, comprising: A fixed shell, comprising an open end, wherein a display panel is arranged inside the fixed shell; a reflector, at least partially located in the fixed housing and rotatably connected to the fixed housing; A rotating shell, which is rotatably sleeved on the open end, and a projection lens is provided on a side of the rotating shell away from the fixed shell; The rotating assembly is arranged on the outer wall of the fixed shell, one end of which is fixedly connected to the bottom of the rotating shell, and the other end of which is fixedly connected to the reflector. When driven, the rotating shell, the projection lens and the reflector are driven to rotate relative to the fixed shell at the same time.

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

3. The projection device according to claim 2, characterized in that: 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 shell, the end of the connecting shaft close to the reflector is rotatably connected to the fixed shell, 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, and the other end of the fixed shaft is fixedly connected to the reflector.

4. The projection device according to claim 3, characterized in that: The length of the connecting shaft and the length of the connecting rod need to meet the following conditions: Wherein, L1 is the length of the connecting shaft, L2 is the length of the connecting rod, θ is the angle between the lens optical axis of the projection lens and the first axis, 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.

5. The projection device according to claim 3, 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, which is fixedly connected to the fixed shaft after extending out of the fixed shell, and the extended end is rotatably connected to the fixed shell.

6. 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 where the reflector is located and the first axis is The first axis is a central axis of the fixed shell.

7. The projection device according to claim 6, characterized in that:

8. The projection device according to claim 6, characterized in that: θ is 0~110°, 0~55°.

9. The projection device according to claim 3, characterized in that: It also includes a driving assembly, which includes a meshing driving gear and a driven gear, and a driving member connected to the driving gear, and the driven gear is fixedly connected to the end of the connecting shaft away from the connecting rod.

10. The projection device according to claim 9, characterized in that: The driving gear and the driven gear are both located in the fixed housing. The driving member includes a driving shaft. The driving shaft passes through the fixed housing and is connected to the driving gear. The driving member is configured to drive the driving gear to rotate.

11. The projection device according to claim 9, characterized in that: The number of teeth of the driving gear is greater than the number of teeth of the driven gear.

12. The projection device according to claim 9, 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.

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

Images