Projector with LCD screen rotation function

Abstract

The utility model relates to a projector with an LCD screen rotation function. The projector comprises a housing; the LCD screen assembly is rotationally installed in the machine shell; the LCD screen assembly comprises an LCD screen, a frame, a pressing piece and a blocking piece. The LCD screen is mounted in the frame; the pressing sheet is mounted at the top of the frame and forms a gap with the top of the frame; the blocking piece is installed on the side face of the top of the frame. The FPC fixing frame is installed outside the machine shell; a winding column is arranged in the FPC fixing frame; the FPC is connected with the LCD screen; the LCD screen penetrates through the gap, penetrates through the machine shell to enter the FPC fixing frame, bypasses the winding column to form a bent part and then penetrates out of the FPC fixing frame. According to the utility model, the FPC is transferred to the FPC fixing frame outside the casing in a follow-up torsion manner, so that the influence on the heat dissipation air channel in the casing is avoided, and the heat dissipation effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a projector with LCD screen rotation function. BACKGROUND

[0002] In the optical system of the projection equipment, in order to improve the imaging quality, the existing technology often applies the Scheimpflug principle to actively adjust the included angle between the LCD screen and the optical axis of the lens by designing a rotatable LCD screen. This scheme can make the imaging plane of the LCD screen and the main plane of the lens intersect with the target projection plane in a line even when the projection light path is not perpendicular to the projection plane, so that a clear image with uniform focus can be obtained in the entire projection area, effectively overcoming the defocus and trapezoidal distortion problems when projecting obliquely.

[0003] However, the above-mentioned rotation adjustment mechanism has derived new structural problems in actual application. In order to realize signal transmission and power supply, the LCD screen is usually connected with the mainboard of the equipment through an FPC (Flexible Printed Circuit). When the LCD screen rotates back and forth to realize the Scheimpflug adjustment, the connected FPC is forced to swing and twist and deform in the internal space of the equipment. The twist and deformation of the FPC essentially occupies the airflow channel space planned in advance in the equipment, changes the effective flow cross section of the original air duct, disturbs the designed airflow path, increases the air resistance, and causes the cooling airflow flow rate to decrease, the flow to decrease, and the flow field to be turbulent, thereby affecting the cooling effect.

[0004] Therefore, it is necessary to provide a projector with LCD screen rotation function, which can avoid the interference of the follow-up twist and deformation of the FPC with the internal air duct of the equipment and avoid affecting the cooling effect. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide a projector with LCD screen rotation function, which can avoid the interference of the follow-up twist and deformation of the FPC with the internal air duct of the equipment and avoid affecting the cooling effect.

[0006] A projector with LCD screen rotation function, comprising:

[0007] A housing;

[0008] An LCD screen assembly is rotatably installed in the housing; the LCD screen assembly comprises an LCD screen, a frame, a pressing piece and a blocking piece; the LCD screen is installed in the frame; the pressing piece is installed on the top of the frame and forms a gap with the top of the frame; the blocking piece is installed on the side surface of the top of the frame;

[0009] An FPC fixing frame is installed outside the housing; the FPC fixing frame is provided with a winding column inside;

[0010] FPC, connected with the LCD screen; the LCD screen passes through the gap, and passes through the shell into the FPC fixing frame, bypasses the winding column to form a bending part, and then passes out from the FPC fixing frame.

[0011] Further, the FPC fixing frame is provided with a first winding column and a second winding column arranged at intervals, the distance between the first winding column and the shell is greater than the distance between the second winding column and the shell; after the FPC passes out from the shell, the FPC first bypasses the first winding column, then bypasses the second winding column, and finally extends out of the FPC fixing frame, so that the FPC forms an S-shaped bending part.

[0012] Further, the bottom of the shell is provided with an internal fan, the top of the shell is provided with a radiator, and a circulating air path passing through the LCD screen is formed in the shell.

[0013] Further, the frame comprises a first screen frame and a second screen frame; the LCD screen is mounted between the first screen frame and the second screen frame; the first screen frame is provided with a first heat insulation glass, and the second screen frame is provided with a second heat insulation glass; a first area accommodating the circulating air path is formed between the first heat insulation glass and the LCD screen; a second area accommodating the circulating air path is formed between the second heat insulation glass and the LCD screen.

[0014] Further, the upper and lower ends of the LCD screen assembly are respectively provided with rotating shafts; the upper and lower ends of the shell are respectively provided with rotating holes; the rotating shafts and the rotating holes are rotationally matched.

[0015] Further, a T-shaped shaft sleeve is arranged between the rotating shaft and the rotating hole; a first chamfer is arranged in the T-shaped shaft sleeve, and a second chamfer is arranged on the rotating shaft, so that a first sealing cavity is formed between the T-shaped shaft sleeve and the rotating shaft, and lubricating oil is arranged in the first sealing cavity; a third chamfer is arranged in the rotating hole, so that a second sealing cavity is formed between the T-shaped shaft sleeve and the rotating hole, and lubricating oil is arranged in the second sealing cavity.

[0016] Further, a driving shaft is mounted at the upper end or the lower end of the LCD screen assembly; an adjusting assembly is further mounted on the shell; the adjusting assembly comprises a linear driving assembly and a fork; the linear driving assembly is mounted outside the shell, and the fork is connected with the linear driving assembly and is driven by the linear driving assembly to move; the fork extends into the shell and is provided with a bayonet at the end; the driving shaft is movably arranged in the bayonet, so that when the linear driving assembly drives the fork to move, the LCD screen assembly is rotated.

[0017] Further, the shell is provided with an adjusting window accommodating the fork; a stabilizing plate is mounted on the fork, and the stabilizing plate shields the adjusting window.

[0018] Further, the adjusting assembly further comprises a mounting frame, which is mounted outside the casing; the mounting frame is provided with a detection module; the shifting fork is provided with a permanent magnet; and the detection module is used for detecting the position of the permanent magnet.

[0019] Further, the drive shaft comprises a drive shaft body and a work-type sleeve; the work-type sleeve is sleeved on the drive shaft body; and the work-type sleeve is movably arranged in the bayonet.

[0020] Beneficial effects: the projector with the LCD screen rotation function avoids the FPC in the casing from following torsion, and transfers the FPC following torsion to the FPC fixing frame outside the casing, avoids affecting the heat dissipation air duct in the casing, and guarantees the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the projector;

[0023] Figure 2 It is a schematic diagram of the hidden part of the casing of the projector;

[0024] Figure 3 It is a schematic diagram of the cross-section of the projector;

[0025] Figure 4 It is an enlarged schematic diagram of the inside of the FPC fixing frame when the LCD screen assembly is not rotated;

[0026] Figure 5 It is an enlarged schematic diagram of the inside of the FPC fixing frame when the LCD screen assembly is rotated;

[0027] Figure 6 It is an exploded schematic diagram of the LCD screen assembly;

[0028] Figure 7 It is a schematic diagram of the cross-section of the projector;

[0029] Figure 8 It is a schematic diagram of the LCD screen assembly;

[0030] Figure 9 It is Figure 7 an enlarged schematic diagram of the A area in the middle;

[0031] Figure 10 is an enlarged view of the B area in 3;

[0032] Figure 11 is a schematic view of the adjusting assembly;

[0033] Figure 12 is a top view of the adjusting assembly;

[0034] Figure 13 is a schematic view of the cooperation between the LCD screen assembly and the adjusting assembly;

[0035] Figure 14 is a front view of the projector.

[0036] BRIEF DESCRIPTION OF DRAWINGS: 1, casing; 2, LCD screen assembly; 3, FPC fixing frame; 4, FPC; 5, inner fan; 6, heat sink; 7, adjusting assembly; 8, main circuit board;

[0037] 11, first window; 12, circulating air path; 13, rotating hole; 14, adjusting window; 15, first positioning feature;

[0038] 131, third chamfer;

[0039] 21, LCD screen; 22, frame; 23, pressing piece; 24, blocking piece; 25, rotating shaft; 26, T-shaped shaft sleeve; 27, driving shaft;

[0040] 221, first screen frame; 222, second screen frame; 223, first heat insulation glass; 224, second heat insulation glass; 225, first area; 226, second area;

[0041] 251, second chamfer;

[0042] 261, first chamfer;

[0043] 271, driving shaft body; 272, work-shaped sleeve; 273, limiting screw;

[0044] 31, first winding column; 32, second winding column; 33, second window;

[0045] 41, S-shaped bending part;

[0046] 71, linear driving assembly; 72, yoke; 73, stabilizing plate; 74, mounting frame; 75, detection module; 76, permanent magnet;

[0047] 721, bayonet; 722, centering alignment edge;

[0048] 731, second positioning feature;

[0049] 741, visual window; 742, alignment reference edge;

[0050] 81, six-axis gyroscope module; 82, ToF sensor module; 83, camera module. DETAILED DESCRIPTION

[0051] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0053] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0054] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0057] Embodiment

[0058] Referring to Figure 1 and Figure 2 , the embodiment provides a projector with an LCD screen rotation function, comprising a casing 1, an LCD screen assembly 2, an FPC fixing frame 3 and an FPC 4. The LCD screen assembly 2 is rotatably installed in the casing 1, and the forming quality of the projector in different projection states is adjusted by adjusting the rotation angle of the LCD screen assembly 2. Figure 6 and 8 , the LCD screen assembly 2 comprises an LCD screen 21, a frame 22, a pressing piece 23 and a blocking piece 24. The LCD screen 21 is installed in the frame 22; the pressing piece 23 is installed on the top of the frame 22 and forms a gap with the top of the frame 22. Specifically, one end of the pressing piece 23 is connected to the edge of the top plate of the frame 22, and the other end extends towards the other edge of the frame 22, so that a gap is formed between the pressing piece 23 and the top of the frame 22. The blocking piece 24 is installed on the side of the top of the frame 22, specifically, the blocking piece 24 is installed on the side of the frame 22 away from the pressing piece 23. The displacement and torsion of the FPC 4 in the horizontal direction and the vertical direction are limited by the cooperation of the pressing piece 23 and the blocking piece 24.

[0059] The FPC fixing frame 3 is installed outside the casing 1; the FPC fixing frame 3 is provided with a winding column. It should be noted that the casing 1 is provided with a first window 11 for accommodating the FPC 4, and the FPC fixing frame 3 covers the first window 11. One end of the FPC 4 is connected to the LCD screen 21, and the other end of the FPC 4 is connected to the FPC fixing frame 3. Figure 8As shown, the other end of the FPC 4 passes through the gap from inside, and is limited by the pressing piece 23 and the blocking piece 24. Please refer to Figure 4 and Figure 5 As shown, the FPC 4 continues to pass out of the first window 11 of the casing 1 into the FPC fixing frame 3, and winds around the winding column to form a curved portion before passing out of the FPC fixing frame 3, and finally connects with the main circuit board 8. It should be noted that the FPC fixing frame 3 is provided with a second window 33 for accommodating the FPC 4 to pass out, and a first sealing gasket is arranged at the second window 33 to protect the FPC 4 and improve the sealing of the casing 1.

[0060] The projector with the LCD screen rotation function provided in the embodiment limits the FPC 4 to the top of the frame 22 in the casing 1, and avoids the FPC 4 inside the casing 1 from following rotation and torsion during the rotation of the LCD screen assembly 2, and transfers the following rotation and torsion of the FPC 4 to the FPC fixing frame 3 outside the casing 1, so as to avoid affecting the cooling air duct inside the casing 1 and ensure the cooling effect.

[0061] Specifically, please continue to refer to Figure 4 and Figure 5 As shown, the FPC fixing frame 3 is provided with the first winding column 31 and the second winding column 32 arranged at intervals, and the distance between the first winding column 31 and the casing 1 is greater than the distance between the second winding column 32 and the casing 1; that is, the first winding column 31 is farther away from the casing 1 than the second winding column 32. After the FPC 4 passes out of the casing 1, it first winds around the first winding column 31, then winds around the second winding column 32, and finally extends out of the FPC fixing frame 3, so that the FPC 4 forms an S-shaped curved portion 41. When the LCD screen assembly 2 rotates, if the FPC 4 is not limited, the rotation arc of the portion of the FPC 4 close to the line of the rotation axis 25 is smaller than the rotation arc of the portion far away from the axis, that is, the FPC 4 will be twisted by a large length, so as to not only affect the air duct, but also possibly cause structural collision and resonance sound. In the embodiment, the torsion of the FPC 4 is limited by the pressing piece 23 and the blocking piece 24, so that the following torsion of the FPC 4 is transferred to the S-shaped curved portion 41 of the FPC fixing frame 3, and the torsion around the line of the rotation axis 25 is changed to the bending torsion of the surface of the FPC 4 of the S-shaped curved portion 41, so as to avoid affecting the air duct and avoid causing structural collision, reduce the space required for the action of the FPC 4, so as to reduce the structure volume and also reduce the FPC 4 resistance required to be overcome when the LCD screen 21 is gradually rotated.

[0062] Specifically, the FPC fixing frame 3 includes the first frame body and the second frame body, and the first frame body and the second frame body are respectively provided with a stop feature, so that the first frame body and the second frame body are buckled and form the second window 33.

[0063] Specifically, please refer toFigure 7 As shown in the figure, the bottom of the casing 1 is provided with an internal fan 5, and the top of the casing 1 is provided with a radiator 6, and a circulating air path 12 through the LCD screen 21 is formed in the casing 1. The air circulation is powered by the internal fan 5, so as to drive the air to flow in the circulating air path 12, take away the heat of the LCD screen 21 and the inside of the casing 1, and exchange with the outside through the radiator 6, so as to achieve heat dissipation.

[0064] Specifically, referring to Figure 6 and 7 As shown in the figure, the frame 22 includes a first screen frame 221 and a second screen frame 222; the LCD screen 21 is installed between the first screen frame 221 and the second screen frame 222; the first screen frame 221 is provided with a first heat insulation glass 223, and the second screen frame 222 is provided with a second heat insulation glass 224; a first area 225 accommodating the circulating air path 12 is formed between the first heat insulation glass 223 and the LCD screen 21; and a second area 226 accommodating the circulating air path 12 is formed between the second heat insulation glass 224 and the LCD screen 21. When the air flows, it flows through the first area 225 and the second area 226 respectively, flows through both sides of the LCD screen 21, and improves the heat dissipation effect of the LCD screen 21. In order to further improve the heat dissipation effect, the polarizing film is attached to the first heat insulation glass 223 and the second heat insulation glass 224 respectively to share the heat.

[0065] Specifically, referring to Figure 3 As shown in the figure, the upper and lower ends of the LCD screen assembly 2 are respectively provided with rotating shafts 25; the upper and lower ends of the casing 1 are respectively provided with rotating holes 13, which are blind holes; and the rotating shafts 25 and the rotating holes 13 are rotationally matched. The rotating installation of the LCD screen assembly 2 is realized. Referring to Figure 9 As shown in the figure, a T-shaped shaft sleeve 26 is arranged between the rotating shaft 25 and the rotating hole 13; a first chamfer 261 is arranged in the T-shaped shaft sleeve 26, and a second chamfer 251 is arranged on the rotating shaft 25, so that a first sealing cavity is formed between the T-shaped shaft sleeve 26 and the rotating hole 13, and lubricating oil is arranged in the first sealing cavity; a third chamfer 131 is arranged in the rotating hole 13, so that a second sealing cavity is formed between the T-shaped shaft sleeve 26 and the rotating hole 13, and lubricating oil is arranged in the second sealing cavity. By arranging the chamfers, on the one hand, the assembly between the rotating shaft 25, the T-shaped shaft sleeve 26 and the rotating hole 13 is guided, and the installation is facilitated; on the other hand, the sealing cavity is formed to store sealing oil, which can provide lubricating effect to reduce the rotating resistance, and can also avoid the overflow of lubricating material and the entry of the detached objects caused by friction into the light machine, so as to avoid the pollution to the light machine.

[0066] Specifically, referring to Figure 8As shown, a drive shaft 27 is mounted on the lower end of the LCD screen assembly 2. It should be noted that in other embodiments, the drive shaft 27 can also be mounted on the upper end of the LCD screen assembly 2. (Refer to...) Figure 1 , Figure 11 , Figure 12 , Figure 13 As shown, an adjustment assembly 7 is also installed on the housing 1; the adjustment assembly 7 includes a linear drive assembly 71 and a shift fork 72; the linear drive assembly 71 is installed outside the housing 1, and the shift fork 72 is connected to the linear drive assembly 71, and is driven to move by the linear drive assembly 71; the shift fork 72 extends into the housing 1, and has a locking slot 721 at its end; the drive shaft 27 is movably disposed in the locking slot 721, so that when the linear drive assembly 71 drives the shift fork 72 to move, it drives the LCD screen assembly 2 to rotate. When the linear drive assembly 71 drives the shift fork 72 to move, since the drive shaft 27 is engaged in the locking slot 721, the shift fork 72 drives the drive shaft 27 to rotate around the axis of the rotation shaft 25, thereby realizing the angle adjustment of the LCD screen assembly 2.

[0067] Specifically, refer to Figure 10 As shown, the housing 1 is provided with an adjustment window 14 for the fork 72 to pass through. A stabilizing plate 73 is mounted on the fork 72, and the stabilizing plate 73 shields the adjustment window 14. This ensures a tight seal inside the housing 1 and prevents dust and other substances from entering. A second sealing gasket is also provided between the housing 1 and the stabilizing plate 73 to further enhance the sealing effect.

[0068] Specifically, refer to Figure 11 As shown, the adjustment assembly 7 also includes a mounting bracket 74, which is mounted on the outside of the housing 1. The mounting bracket 74 is equipped with a detection module 75, and the shift fork 72 is equipped with a permanent magnet 76. The detection module 75 is used to detect the position of the permanent magnet 76. By sensing the position of the permanent magnet 76 through the detection module 75, the position of the shift fork 72 can be determined, thereby determining the rotation angle of the LCD screen assembly 2.

[0069] Specifically, refer to Figure 12 As shown, the mounting bracket 74 is provided with a viewing window 741, the fork 72 is provided with a center alignment edge 722, and the mounting bracket 74 is provided with an alignment reference edge 742. The center alignment edge 722 can be observed through the viewing window 741. When the center alignment edge 722 is aligned with the alignment reference edge 742, the projector is in its initial state.

[0070] Specifically, refer to Figure 14As shown, the first positioning feature 15 is arranged on the casing 1, and the second positioning feature 731 is arranged on the stabilizing plate 73. When the first positioning feature 15 is aligned with the second positioning feature 731, the projector is in the initial state. Through the above two visual alignment features, it is helpful for the staff to manually and quickly adjust the screen assembly to the initial state before picture calibration during production operation, and provides a visual judgment basis, thereby improving the operation efficiency and success rate of the staff

[0071] Specifically, referring to Figure 10 As shown, the drive shaft 27 comprises a drive shaft body 271 and a work-type sleeve 272; the work-type sleeve 272 is sleeved on the drive shaft body 271; and the work-type sleeve 272 is movably arranged in the bayonet 721. The work-type sleeve 272 is connected with the drive shaft body 271 through a limiting screw 273, and the work-type sleeve 272 can limit the vertical relative position of the shift fork 72, so as to avoid the disengagement of the shift fork 72 and the drive shaft 27. It should be noted that in the embodiment, the work-type sleeve 272 can be made of silica gel, and in other embodiments, other flexible materials can also be used.

[0072] Specifically, the projector further comprises a six-axis gyroscope module 81, a ToF sensor module 82 and a camera module 83. The six-axis gyroscope module 81 is integrated on the main circuit board 8, and the ToF sensor module 82 and the camera module 83 are respectively mounted on the casing 1. The ToF sensor module 82, the camera module 83, the detection module 75 and the linear drive assembly 71 are respectively electrically connected with the main circuit board 8. The position and posture of the projector are judged through the six-axis gyroscope module 81, the ToF sensor module 82 and the camera module 83, and the corresponding signals are transmitted to the main circuit board 8. The main circuit board 8 drives the linear drive assembly 71 to act according to the position of the shift fork 72 detected by the detection module 75, so as to adjust the rotation angle of the LCD screen assembly 2.

[0073] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0074] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A projector with an LCD screen rotation function, characterized in that, include: chassis; The LCD screen assembly is rotatably mounted inside the housing; the LCD screen assembly includes an LCD screen, a frame, a pressure plate, and a baffle. The LCD screen is installed inside the frame; the pressure plate is installed on the top of the frame and forms a gap with the top of the frame; the baffle is installed on the side of the top of the frame; An FPC mounting bracket is installed outside the housing; the FPC mounting bracket is equipped with a winding column. The FPC is connected to the LCD screen; the LCD screen passes through the gap, passes through the housing and enters the FPC mounting bracket, bends around the winding column, and then exits from the FPC mounting bracket.

2. The projector with LCD screen rotation function according to claim 1, characterized in that, The FPC mounting bracket is provided with a first winding post and a second winding post arranged at intervals. The distance between the first winding post and the housing is greater than the distance between the second winding post and the housing. After the FPC passes through the housing, it first goes around the first winding post, then around the second winding post, and finally extends outward from the FPC mounting bracket, so that the FPC forms an S-shaped bend.

3. The projector with LCD screen rotation function according to claim 1, characterized in that, An internal fan is provided at the bottom of the housing, and a radiator is provided at the top of the housing, forming a circulating airflow path that passes through the LCD screen inside the housing.

4. The projector with the LCD screen rotation function according to claim 3, characterized in that, The frame includes a first screen frame and a second screen frame; the LCD screen is installed between the first screen frame and the second screen frame; a first heat-insulating glass is provided on the first screen frame, and a second heat-insulating glass is provided on the second screen frame; a first area is formed between the first heat-insulating glass and the LCD screen to accommodate the passage of the circulating air path; a second area is formed between the second heat-insulating glass and the LCD screen to accommodate the passage of the circulating air path.

5. The projector with LCD screen rotation function according to claim 1, characterized in that, The LCD screen assembly has a rotating shaft at its upper and lower ends; the housing has a rotating hole at its upper and lower ends; the rotating shaft and the rotating hole are rotatably engaged.

6. The projector with LCD screen rotation function according to claim 5, characterized in that, A T-shaped bushing is provided between the rotating shaft and the rotating hole; the T-shaped bushing has a first chamfer, and the rotating shaft has a second chamfer, so that a first sealing cavity is formed between the T-shaped bushing and the rotating shaft, and the first sealing cavity is provided with lubricating oil; the rotating hole has a third chamfer, so that a second sealing cavity is formed between the T-shaped bushing and the rotating hole, and the second sealing cavity is provided with lubricating oil.

7. The projector with LCD screen rotation function according to claim 5, characterized in that, A drive shaft is installed at the upper or lower end of the LCD screen assembly; an adjustment assembly is also installed on the housing; the adjustment assembly includes a linear drive assembly and a shift fork; the linear drive assembly is installed outside the housing, and the shift fork is connected to the linear drive assembly and is driven to move by the linear drive assembly; the shift fork extends into the housing and has a locking slot at its end; the drive shaft is movably disposed within the locking slot, so that when the linear drive assembly drives the shift fork to move, it drives the LCD screen assembly to rotate.

8. The projector with LCD screen rotation function according to claim 7, characterized in that, The housing is provided with an adjustment window for accommodating the through which the shift fork passes; a stabilizing plate is mounted on the shift fork, and the stabilizing plate shields the adjustment window.

9. The projector with LCD screen rotation function according to claim 7, characterized in that, The adjustment assembly also includes a mounting bracket, which is mounted on the outside of the housing; the mounting bracket is equipped with a detection module, and the shift fork is equipped with a permanent magnet, the detection module being used to detect the position of the permanent magnet.

10. The projector with LCD screen rotation function according to claim 7, characterized in that, The drive shaft includes a drive shaft body and an I-shaped sleeve; the I-shaped sleeve is fitted onto the drive shaft body; the I-shaped sleeve is movably disposed within the bayonet.

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