Angle adjustment module and projection device

Abstract

This invention discloses an angle adjustment module and a projection device. The angle adjustment module is applicable to a projection device and includes a driving device and a lifting device. The driving device is disposed within the projection device and includes a driving component and a transmission component. The lifting device includes a linkage support component and a lifting component. The driving component is disposed on the bottom cover of the projection device, and one end of the transmission component is connected to the driving component. The lifting component passes through the opening in the bottom cover of the projection device and moves relative to the bottom cover in a direction perpendicular to the bottom cover to adjust the elevation angle of the projection device. The linkage support component is disposed within the projection device and is connected to one end of the lifting component located within the projection device and the other end of the transmission component, respectively, to drive the lifting component to move relative to the bottom cover and to provide static support force for the lifting component. Therefore, the elevation angle of the projection device can be adjusted by using the driving component to drive the lifting component to move relative to the bottom cover without manually lifting the projection device.

Description

Technical Field

[0001] This invention relates to an angle adjustment module and a projection device, and more particularly to an angle adjustment module capable of adjusting the elevation angle of a projection device using power, and a projection device employing this angle adjustment module. Background Technology

[0002] Projection devices are usually equipped with adjustable feet at the bottom, allowing users to manually adjust the height of the feet to change the angle of the projected image and meet their projection needs.

[0003] For heavier projection devices, the weight of the device directly presses against the adjustable feet, making manual adjustment difficult for users. Furthermore, rotating adjustable feet are typically screwed into the bottom of the projection device from the outside, making it easy for users to unknowingly unscrew them and cause them to fall off. Additionally, pop-up adjustable feet are difficult to precisely control manually, failing to meet fine-tuning needs, and require an additional release button for users to press and release them.

[0004] Therefore, the existing projection devices designed for manually adjusting the height of the lifting feet have problems such as inconvenience for users or poor efficiency in adjusting the projection tilt angle.

[0005] The "Background Art" paragraph is only used to help understand the content of this invention. Therefore, the content disclosed in the "Background Art" paragraph may include some known technologies that are not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not represent that the content or the problems to be solved by one or more embodiments of this invention were known or recognized by those skilled in the art prior to this application. Summary of the Invention

[0006] This invention provides an angle adjustment module and a projection device, which can solve the problems of inconvenient user operation or poor efficiency in adjusting the projection elevation angle in existing projection devices designed for manually adjusting the height of the lifting foot pad.

[0007] Other objects and advantages of the present invention can be further understood from the technical features disclosed herein.

[0008] To achieve one or more of the above-mentioned objectives or other objectives, an embodiment of the present invention provides an angle adjustment module suitable for a projection device. The projection device includes a bottom cover with an opening. The angle adjustment module includes a driving device and a lifting device. The driving device is disposed within the projection device and includes a driving component and a transmission component. The lifting device includes a linkage support component and a lifting component. The driving component is disposed on the bottom cover, and one end of the transmission component is connected to the driving component. The lifting component passes through the opening in the bottom cover and moves relative to the bottom cover in a direction perpendicular to the bottom cover to adjust the elevation angle of the projection device. The linkage support component is disposed within the projection device and is connected to one end of the lifting component located within the projection device and the other end of the transmission component, respectively, to drive the lifting component to move relative to the bottom cover and provide static support force for the lifting component.

[0009] To achieve one or more of the above-mentioned objectives or other objectives, an embodiment of the present invention provides a projection device, comprising: a bottom cover and an angle adjustment module; the bottom cover has an opening, and the angle adjustment module includes a driving device and a lifting device. The driving device is disposed within the projection device and includes a driving component and a transmission component; the lifting device includes a linkage support component and a lifting component. The driving component is disposed on the bottom cover, and one end of the transmission component is connected to the driving component; the lifting component passes through the opening of the bottom cover and moves relative to the bottom cover in a direction perpendicular to the bottom cover to adjust the elevation angle of the projection device; the linkage support component is disposed within the projection device and is connected to one end of the lifting component located within the projection device and the other end of the transmission component, respectively, to drive the lifting component to move relative to the bottom cover and provide static support force for the lifting component.

[0010] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the angle adjustment module and projection device in this embodiment, the drive component drives the transmission component, which in turn drives the linkage support component to move, thereby moving the lifting component relative to the bottom cover. This improves the inconvenience of adjusting the projection elevation angle in existing projection devices. Furthermore, by adjusting the lifting component's movement according to the drive amount of the drive component, a stepless adjustment is achieved, allowing for more precise control of the height of the lifting component extending out of the projection device, thus improving the poor efficiency of projection elevation angle adjustment in existing projection devices. In addition, the design of connecting the lifting component to one end of the lifting component located inside the projection device via the linkage support component prevents the lifting component from detaching from the bottom of the projection device.

[0011] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a perspective view of an embodiment of the projection device of the present invention;

[0013] Figure 2 for Figure 1 A partial exploded view;

[0014] Figure 3 This is a perspective view of a first embodiment of the angle adjustment module of the present invention applied to a projection device;

[0015] Figure 4 for Figure 3 Exploded view;

[0016] Figure 5 for Figure 3 Cross-sectional view of the midline segment AA';

[0017] Figure 6 for Figure 5 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0018] Figure 7 for Figure 3 Circuit block diagram of the angle adjustment module;

[0019] Figure 8 for Figure 4 A three-dimensional view of the combination of drive components and transmission components;

[0020] Figure 9 for Figure 3 A three-dimensional diagram of the combination of the linkage support component and the lifting component;

[0021] Figure 10 This is a perspective view of a second embodiment of the angle adjustment module of the present invention applied to a projection device;

[0022] Figure 11 for Figure 10 Exploded view;

[0023] Figure 12 for Figure 10 Cross-sectional view of the midline segment BB';

[0024] Figure 13 for Figure 12 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0025] Figure 14 for Figure 10 Circuit block diagram of the angle adjustment module;

[0026] Figure 15 This is a perspective view of a third embodiment of the angle adjustment module of the present invention applied to a projection device;

[0027] Figure 16 for Figure 15 Exploded view;

[0028] Figure 17 for Figure 15 Cross-sectional view of the midline segment CC';

[0029] Figure 18 for Figure 17 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0030] Figure 19 This is a perspective view of a fourth embodiment of the angle adjustment module of the present invention applied to a projection device;

[0031] Figure 20 for Figure 19 Exploded view;

[0032] Figure 21 for Figure 19 A three-dimensional view of the combination of drive components and transmission components;

[0033] Figure 22 for Figure 19 A three-dimensional diagram of the combination of the linkage support component and the lifting component;

[0034] Figure 23 This is a perspective view of the fifth embodiment of the angle adjustment module of the present invention applied to a projection device;

[0035] Figure 24 for Figure 23 Exploded view;

[0036] Figure 25 This is a perspective view of the sixth embodiment of the angle adjustment module of the present invention applied to a projection device;

[0037] Figure 26 for Figure 25 Exploded view;

[0038] Figure 27 for Figure 26 A three-dimensional view of the combination of drive components and transmission components;

[0039] Figure 28 for Figure 26 A three-dimensional diagram of the combination of the linkage support component and the lifting component;

[0040] Figure 29 This is a perspective view of the seventh embodiment of the angle adjustment module of the present invention applied to a projection device;

[0041] Figure 30 for Figure 29 Exploded view;

[0042] Figure 31 for Figure 29 Cross-sectional view of the midline segment DD';

[0043] Figure 32 for Figure 31 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0044] Figure 33 for Figure 29 Circuit block diagram of the angle adjustment module;

[0045] Figure 34 This is a perspective view of the eighth embodiment of the angle adjustment module of the present invention applied to a projection device;

[0046] Figure 35 for Figure 34 Exploded view;

[0047] Figure 36 for Figure 34 Cross-sectional view of the middle segment EE';

[0048] Figure 37 for Figure 36 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0049] Figure 38 for Figure 37 A three-dimensional schematic diagram;

[0050] Figure 39 for Figure 34 Circuit block diagram of the angle adjustment module;

[0051] Figure 40 This is a perspective view of the ninth embodiment of the angle adjustment module of the present invention applied to a projection device;

[0052] Figure 41 for Figure 40 Exploded view;

[0053] Figure 42 for Figure 40 Cross-sectional view of the midline segment FF';

[0054] Figure 43 for Figure 42 A schematic diagram showing the lifting assembly moving towards the outside of the projection device;

[0055] Figure 44 for Figure 43 A three-dimensional schematic diagram; and

[0056] Figure 45 for Figure 40 The circuit block diagram of the angle adjustment module.

[0057] Explanation of symbols in the attached drawings:

[0058] 1: Projection device; 2, 3, 4, 5: Angle adjustment module; 10, 40: Opening; 11: Top cover; 12, 30, 50, 60: Bottom cover; 13: Screw; 14: First inclined surface; 14a: Groove; 14b: Protruding tooth; 15: Second inclined surface; 15a: Protruding strip; 15b: Guide groove; 17, 28, 36, 45, 56: Baffle; 18, 38, 47, 58: Position detection unit; 19, 34, 44, 54: Control unit; 20a: Main protruding tooth; 20b: Secondary protruding tooth; 2 1, 31, 41, 51: Drive unit; 22, 32, 42, 52: Lifting device; 23, 33, 43, 53: Image acquisition unit; 24, 34, 44, 54: Control unit; 25: Fixing plate; 26, 39, 48, 59: Circuit board; 27: Spacer column; 29, 37, 46, 57: Vertical plate; 35: Pin shaft; 55: Horizontal guide groove; 70: Outer rod; 71: Inner rod; 96a: First end; 96b: Second end; 121, 29a, 30a, 37a, 50a, 5 7a, 60a: Openings; 122: Support boss; 123: Fixed column; 211, 311, 411, 511: Drive assembly; 212, 312, 412, 512: Transmission assembly; 221, 321, 421, 521: Linkage support assembly; 222, 322, 422, 522: Lifting assembly; 251: Fixed bracket; 252: Linear groove; 2111, 3111, 4111, 5111: Drive body; 2112, 3112, 4112, 5112: Drive shaft; 2121: Wedge nut; 2211: Wedge block; 2212: Fastening nut; 2213, 4211: Elastic element; 2221, 3221, 4221, 5221: Support rod; 2222: Foot pad; 3121: Nut; 3211: Connecting rod; 4121, 5121: Cam; 4212: Top plate; 5122: Protruding column; 5211: Transmission plate; AA', BB', CC', DD', EE', FF': Line segment; P: Locking point; X, Y, Z: Shaft. Detailed Implementation

[0059] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0060] Please see Figure 1 and Figure 2 , Figure 1 This is a perspective view of an embodiment of the projection device of the present invention. Figure 2 for Figure 1 A partial exploded view. For example... Figure 1and Figure 2 As shown, the projection device 1 includes a top cover 11, a bottom cover 12, and an angle adjustment module 2. The top cover (e.g., including an upper cover and a side cover) 11 and the bottom cover (e.g., a lower cover) 12 are assembled to form an accommodating space (not shown). At least a portion of the light source, optical components, electronic components, heat dissipation components, optical engine, and projection lens of the projection device 1 are disposed within the accommodating space. The short side of the bottom cover 12 is defined as the X-axis, the long side of the bottom cover 12 is defined as the Y-axis, and the thickness of the projection device 1 is defined as the Z-axis. The X-axis, Y-axis, and Z-axis are orthogonal to each other.

[0061] In this embodiment, the bottom cover 12 has at least one opening 121, and the number of angle adjustment modules 2 is at least one. Each opening 121 is paired with an angle adjustment module 2, and the number of openings 121 and angle adjustment modules 2 can be adjusted according to actual needs. For example, when there is only one angle adjustment module 2, it can adjust the elevation angle of the projection device 1. When there are multiple angle adjustment modules 2, in addition to adjusting the elevation angle of the projection device 1, they can also stably mount the projection device 1 on an uneven surface (e.g., a table or workbench) and correct skewed projected images in different directions. The method by which the angle adjustment modules 2 adjust the elevation angle of the projection device 1 will be described in detail later.

[0062] In one embodiment, when the number of openings 121 and angle adjustment modules 2 is four, the four openings 121 are located, for example, at the four corners of the bottom cover 12, and the four angle adjustment modules 2 correspond to the four openings 121 respectively. In another embodiment, when the number of openings 121 and angle adjustment modules 2 is three, two of the three openings 121 are located, for example, at the two corners corresponding to one long side of the bottom cover 12, and one of the three openings 121 is located, for example, at the center of the bottom cover 12 adjacent to another long side, and the three angle adjustment modules 2 correspond to the three openings 121 respectively (e.g., ...). Figure 1 and Figure 2 (As shown). Since the multiple angle adjustment modules 2 in the above embodiments are very similar to each other or even the same, the structural design of one of the angle adjustment modules 2 will be described in detail below, while the structural designs of the other angle adjustment modules 2 can be deduced by analogy.

[0063] Please see Figures 3 to 6 , Figure 3 This is a perspective view of a first embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 4 for Figure 3 Explosion diagram, Figure 5 for Figure 3 Cross-sectional view of the midline segment AA' Figure 6 for Figure 5A schematic diagram showing the lifting assembly moving outwards from the projection device. (See diagram.) Figures 3 to 6 As shown, the angle adjustment module 2 includes: a drive device 21 and a lifting device 22. The drive device 21 is mounted on the projection device 1 (e.g., Figure 2 (As shown) Inside, the drive device 21 includes a drive assembly 211 and a transmission assembly 212, and the lifting device 22 includes a linkage support assembly 221 and a lifting assembly 222. The drive assembly 211 is disposed on the bottom cover 12, and one end of the transmission assembly 212 is connected to the drive assembly 211; the lifting assembly 222 passes through the opening 121 of the bottom cover 12 and moves relative to the bottom cover 12 in a direction (approximately) perpendicular to the bottom cover 12 (i.e., the Z-axis direction) to adjust the elevation angle of the projection device 1 (e.g., as shown). Figure 5 and Figure 6 (As shown); the linkage support assembly 221 is disposed inside the projection device 1. The linkage support assembly 221 is connected to one end of the lifting assembly 222 located inside the projection device 1 and the other end of the transmission assembly 212, respectively, so as to drive the lifting assembly 222 to move relative to the bottom cover 12 and provide static support force for the lifting assembly 222. The static support force is the force that allows the lifting assembly 222 to maintain its current state when the driving assembly 211 does not drive the lifting assembly 222 to move.

[0064] Therefore, by driving the transmission component 212 through the drive component 211, which in turn drives the linkage support component 221 to actuate, thereby moving the lifting component 222 relative to the bottom cover 12, the inconvenience of adjusting the projection elevation angle in existing projection devices can be improved. Furthermore, by controlling the driving amount of the drive component 211 to adjust the actuation of the lifting component 222, a stepless adjustment is achieved, allowing for more precise control of the length of the lifting component 222 extending out of the projection device 1, thus improving the poor efficiency of projection elevation angle adjustment in existing projection devices. In addition, the design of the linkage support component 221 connecting to one end of the lifting component 222 located inside the projection device 1 prevents the lifting component 222 from detaching from the bottom of the projection device 1.

[0065] Please see Figure 7 , it is Figure 3 The circuit block diagram of the angle adjustment module. (Example) Figure 7As shown, the angle adjustment module 2 may further include a control unit 24, which is connected to the drive component 211 and disposed at any position within the projection device 1. In one embodiment, the angle adjustment module 2 may further include an image-capturing unit 23, which is connected to the control unit 24. The image-capturing unit 23 is used to capture a captured image of the projected image corresponding to the projection device 1 and transmit the captured image to the control unit 24, so that the control unit 24 controls the drive component 211 based on the captured image, thereby adjusting the projected image. The control unit 24 may be, for example, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a programmable controller, a programmable logic device (PLD), or other similar devices or combinations thereof, but is not limited thereto. Please refer to... Figures 3 to 7 The control unit 24 can control the driving amount of the driving component 211 to adjust the operation of the lifting component 222 accordingly; the control unit 24 can also control the driving component 211 at any time based on the degree of distortion of the actual projected image in the captured image, thereby adjusting the operation of the lifting component 222 to meet the fully automatic real-time dynamic adjustment of the projected image of the projection device 1 (i.e., automatic adjustment of the projected image skew).

[0066] Please see Figure 4 and Figure 8 , Figure 8 for Figure 4 A three-dimensional diagram of the combination of drive components and transmission components. (See diagram below.) Figure 4 and Figure 8 As shown, the drive assembly 211 may include a drive body 2111 and a drive shaft 2112. The drive body 2111 drives the drive shaft 2112 to rotate, and the drive shaft 2112 is connected to the transmission assembly 212. Specifically, the drive body 2111 may be, for example, a drive motor, and the drive shaft 2112 may be, for example, a lead screw with external threads. One end of the drive shaft 2112 is screwed to the transmission assembly 212. The transmission assembly 212 may include a wedge nut 2121, which has an opening 10 for rotatably engaging with the drive shaft 2112. Specifically, the opening 10 has an internal thread, allowing it to rotatably engage with one end of the lead screw, which is the drive shaft 2112. The friction angle between the external thread of the lead screw and the internal thread of the opening 10 can generate a self-locking phenomenon, so that when the control unit 24 stops supplying power to the drive body 2111 or the drive body 2111 stops operating, the wedge nut 2121 will not be released from its original position. Figure 6 The position was pushed back to Figure 5 The location.

[0067] Please see Figures 3 to 6The bottom cover 12 may also be provided with a support boss 122 for supporting the wedge-shaped nut 2121 and a plurality of fixing posts 123 disposed around the support boss 122. The angle adjustment module 2 may also include a fixing plate 25, which is fixed to the plurality of fixing posts 123. Since the fixing plate 25 and the support boss 122 of the bottom cover 12 are located above and below the wedge-shaped nut 2121, and the plurality of fixing posts 123 are located around the wedge-shaped nut 2121 (e.g., to the left and right), Therefore, by means of the fixed plate 25, the supporting boss 122 of the bottom cover 12, and multiple fixing posts 123, the wedge nut 2121 can be translated along the direction parallel to the bottom cover 12 (i.e., the Y-axis direction). (That is, the arrangement of the fixed plate 25, the supporting boss 122, and the multiple fixing posts 123 can restrict the rotational movement of the wedge nut 2121 when the drive shaft 2112 drives the wedge nut 2121 to move, so that the wedge nut 2121 can only move linearly back and forth along the Y-axis direction). For example, when the drive body 2111 drives the drive shaft 2112 to rotate clockwise, the drive shaft 2112 drives the wedge nut 2121 to move in the negative Y-axis direction (i.e., the angle adjustment module 2 moves from the Y-axis direction to the Y-axis direction). Figure 5 Action to Figure 6 When the drive body 2111 drives the drive shaft 2112 to rotate counterclockwise, the drive shaft 2112 drives the wedge nut 2121 to move in the positive Y-axis direction (i.e., the angle adjustment module 2 is moved from the positive Y-axis direction). Figure 6 Action to Figure 5 The number of fixing posts 123 can be, but is not limited to, four, and the actual number can be adjusted according to actual needs; in addition to restricting the rotational movement of the wedge nut 2121, the fixing plate 25 can also extend to form a fixing bracket 251 that supports the drive body 2111; the fixing plate 25 can be fixed to the fixing posts 123 by a plurality of screws 13, and the drive body 2111 can be locked to the fixing bracket 251 and the bottom cover 12 by a plurality of screws 13.

[0068] Please see Figures 4 to 9 , Figure 9 for Figure 3 A three-dimensional diagram of the combination of the linkage support component and the lifting component. (See diagram below.) Figures 4 to 9As shown, the linkage support assembly 221 may include a wedge block 2211, and the lifting assembly 222 may include a support rod 2221 locked to the wedge block 2211; the first inclined surface 14 of the wedge block 2211 is parallel to the second inclined surface 15 of the wedge nut 2121; when the drive body 2111 drives the wedge nut 2121 to translate along the direction parallel to the bottom cover 12 (i.e., the Y-axis direction) by the drive shaft 2112, the wedge nut 2121 pushes the wedge block 2211 by the second inclined surface 15, so that the support rod 2221 moves along the direction perpendicular to the bottom cover 12 (i.e., the Z-axis direction). The linkage support assembly 221 may also include a fastening nut 2212. The support rod 2221 may include an outer rod 70 and an inner rod 71. The outer rod 70 is fixedly disposed at the bottom of the wedge block 2211. The inner rod 71 is sleeved inside the outer rod 70. The inner rod 71 passes through the wedge block 2211 and is screwed into the fastening nut 2212 (that is, one end of the support rod 2221 of the lifting assembly 222 passes through the wedge block 2211 and is screwed into the fastening nut 2212), so that the support rod 2221 is locked to the wedge block 2211, but not limited thereto. In addition, a foot pad 2222 is provided at the other end of the support rod 2221 (that is, a foot pad 2222 is provided at the end of the inner rod 71 away from the fastening nut 2212).

[0069] In this embodiment, when the drive body 2111 drives the wedge nut 2121 to move along the negative Y-axis direction via the drive shaft 2112, the wedge nut 2121 transmits the thrust component to the wedge block 2211 in a sliding manner, thereby causing the wedge block 2211 to drive the support rod 2221 to move along the negative Z-axis direction (i.e., the angle adjustment module 2 is driven by the wedge block 2211 to move along the negative Z-axis direction). Figure 5 Action to Figure 6 In addition, the first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121 can both be planes with a certain degree of roughness. The effective friction between the first inclined surface 14 and the second inclined surface 15 can generate a self-locking phenomenon to enhance the function of preventing loosening (that is, as long as the coefficient of friction is sufficient, the first inclined surface 14 and the second inclined surface 15 are self-locking structures). The wedge block 2211 and the wedge nut 2121 can be made of wear-resistant materials, such as plastic steel, nylon or metal.

[0070] In order for the drive body 2111 to drive the wedge nut 2121 to move along the positive Y-axis direction via the drive shaft 2112 (i.e., the angle adjustment module 2 is driven by the drive shaft 2112), Figure 6 Action to Figure 5 The second inclined surface 15 of the wedge nut 2121 can still maintain close contact with the first inclined surface 14 of the wedge block 2211, and the lifting assembly 222 can move along the positive Z-axis direction, which can be achieved by the setting of the elastic element 2213. Please refer to Figures 3 to 6The linkage support assembly 221 may further include an elastic element 2213, which is sleeved on the support rod 2221 and abuts against the wedge block 2211 and the bottom cover 12 on both sides respectively. When the wedge nut 2121 translates along the direction parallel to the bottom cover 12 (i.e., the Y-axis direction), the wedge nut 2121 compresses the elastic element 2213 by pushing the wedge block 2211, or pushes the wedge block 2211 by the restoring force of the elastic element 2213. The elastic element 2213 is used to provide the static support force to the lifting assembly 222. The elastic element 2213 may be, but is not limited to, a compression spring.

[0071] Specifically, when the drive body 2111 drives the wedge nut 2121 to move along the negative Y-axis direction via the drive shaft 2112 (i.e., the angle adjustment module 2 is driven by the drive shaft 2112), Figure 5 Action to Figure 6 The wedge nut 2121 transmits the thrust component to the wedge block 2211 in a sliding manner. Since the pushing force of the wedge nut 2121 is greater than the sum of the elastic force of the elastic element 2213 and the weight of the projection device 1 carried by the lifting assembly 222, the wedge block 2211 drives the support rod 2221 to move along the negative Z-axis and compress the elastic element 2213. When the drive body 2111 drives the wedge nut 2121 to move along the positive Y-axis via the drive shaft 2112 (i.e., the angle adjustment module 2 moves from the angle adjustment module 2 to the angle adjustment module 2), the wedge nut 2121 moves along the positive Y-axis. Figure 6 Action to Figure 5 The restoring force of the elastic element 2213 pushes the wedge block 2211, allowing the lifting assembly 222 to move along the positive Z-axis. The second inclined surface 15 of the wedge nut 2121 remains in close contact with the first inclined surface 14 of the wedge block 2211. Therefore, the elastic element 2213 enables the support rod 2221 to move along a direction perpendicular to the bottom cover 12 (i.e., the Z-axis direction), while providing the static support force for the lifting assembly 222. Furthermore, the elastic element 2213 also ensures that the support rod 2221 will not rotate or wobble arbitrarily. Moreover, as described above, the support rod 2221 bears part of the weight of the projection device 1, so its appearance is not limited, allowing for more varied and flexible design. Furthermore, since the angle adjustment module 2 is driven by the drive device 21 to move the lifting component 222 relative to the bottom cover 12, there is no need to manually adjust the lifting component 222. Therefore, the appearance of the foot pad 2222 is not restricted, allowing for more varied and flexible design of the foot pad 2222.

[0072] Please see Figures 10 to 13 , Figure 10 This is a perspective view of a second embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 11 for Figure 10 Explosion diagram, Figure 12 for Figure 10 Cross-sectional view of the midline segment BB' Figure 13 for Figure 12 A schematic diagram showing the lifting assembly moving towards the outside of the projection device. Figures 10 to 13 Implementation examples and Figures 3 to 6 The difference between the embodiments is that, Figures 10 to 13 The angle adjustment module 2 is also equipped with a mechanism for detecting the current position of the wedge nut 2121. Specifically, in Figures 10 to 13 In the process, the fixed plate 25 may have a linear groove 252 (parallel to the Y-axis direction), and the top of the wedge nut 2121 has a baffle 17, which is adapted to pass through the linear groove 252. When the wedge nut 2121 translates in the direction parallel to the bottom cover 12 (i.e., the Y-axis direction), the baffle 17 moves along the linear groove 252. The angle adjustment module 2 may also include a plurality of position detection units 18 disposed on the fixed plate 25, and the control unit 24 is electrically connected to the plurality of position detection units 18. The plurality of position detection units 18 are located on at least one side of the movement trajectory of the baffle 17 and are used to detect the current position of the baffle 17 and transmit the detection result to the control unit 24, thereby enabling the control unit 24 to control the drive assembly 211 / drive body 2111 based on the detection result. Among them, to avoid Figures 9 to 12 The diagram is too complex; the electrical connections between the control unit 24 and the position detection unit 18 and the drive assembly 211 / drive body 2111 are only shown on [the diagram]. Figure 14 middle. Figure 14 for Figure 10 The circuit block diagram of the angle adjustment module, wherein, Figure 14 The circuit of angle adjustment module 2 may also optionally include Figure 7 The image-capturing unit 23 controls the drive component 211 based on the degree of distortion of the actual projected image in the captured image, thereby adjusting the operation of the lifting component 222. In one embodiment, the angle adjustment module 2 may further include multiple circuit boards 26 and multiple spacer posts 27, with the spacer posts 27 disposed between the multiple circuit boards 26 and the fixed plate 25; multiple position detection units 18 are disposed on the multiple circuit boards 26 and facing the fixed plate 25, and the multiple position detection units 18 are located on at least one side of the movement trajectory of the baffle 17; the multiple circuit boards 26, multiple spacer posts 27, fixed plate 25 and multiple fixed posts 123 are locked together by multiple screws 13. The circuit boards 26 and position detection units 18 can be set one-to-one, and the number of circuit boards 26 and position detection units can be the same. The actual number and correspondence of circuit boards 26 and position detection units 18 can be adjusted according to actual needs; the number of spacer posts 27 can be, but is not limited to, four, and can be located at the four corners of the fixed plate 25 respectively.

[0073] In this embodiment, the control unit 24 can obtain the current position of the baffle 17 (i.e., the current position of the wedge nut 2121) through the detection results, and control the drive assembly 211 / drive body 2111 to stop operating when it determines that the baffle 17 is at the limit of the detection range formed by multiple position detection units 18, so as to avoid the wedge nut 2121 from exceeding the pre-designed working range and colliding with other components, thereby causing damage. Among them, the position detection unit 18 can be, but is not limited to, an infrared detection unit, a laser ranging unit, or an image capturing unit, and the number of position detection units 18 can be adjusted according to actual needs; when the number of position detection units 18 is more, the control unit 24 obtains the current position of the baffle 17 (i.e., the current position of the wedge nut 2121) through the multiple position detection units 18 more accurately.

[0074] Please see Figures 15 to 18 , Figure 15 This is a perspective view of a third embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 16 for Figure 15 Explosion diagram, Figure 17 for Figure 15 Cross-sectional view of the midline segment CC' Figure 18 for Figure 17 A schematic diagram showing the lifting assembly moving towards the outside of the projection device. Figures 15 to 18 Implementation examples and Figures 3 to 6 The difference between the embodiments is that, Figures 15 to 18 The angle adjustment module 2 is also equipped with a mechanism for detecting the current position of the wedge block 2211. Specifically, in Figures 15 to 18 In the linkage support assembly 221, one side of the wedge block 2211 has a baffle 28; the angle adjustment module 2 may also include multiple position detection units 18 disposed on the vertical plate 29 of the bottom cover 12, and the control unit 24 is electrically connected to the multiple position detection units 18; the multiple position detection units 18 are located on at least one side of the movement trajectory of the baffle 28 and are used to detect the current position of the baffle 28, and transmit the detection result to the control unit 24, so that the control unit 24 controls the drive assembly 211 / drive body 2111 based on the detection result. To avoid Figures 15 to 18 The diagram is too complex, therefore the control unit 24 and its electrical connections with the position detection unit 18 and the drive assembly 211 / drive body 2111 are not shown; the control unit 24 and its electrical connections with the position detection unit 18 and the drive assembly 211 / drive body 2111 in this embodiment can be equivalent to... Figure 14 Therefore, it is not drawn repeatedly (i.e.) Figures 15 to 18 For the circuit architecture of angle adjustment module 2, please refer to [reference needed]. Figure 14The vertical plate 29 may have an opening 29a and be integrally formed with the bottom cover 12, but is not limited thereto; the angle adjustment module 2 may also include multiple circuit boards 26 and multiple screws 13; the multiple circuit boards 26 and the vertical plate 29 are locked together by the multiple screws 13; multiple position detection units 18 are disposed on the multiple circuit boards 26 and pass through the opening 29a, the opening 29a exposing the multiple position detection units 18 so that the multiple position detection units 18 are located on at least one side of the movement trajectory of the baffle 28. It should be noted that, in order to avoid the elastic element 2213 from covering the baffle 28 and the position detection unit 18, the drawing is omitted. Figure 17 and Figure 18 The elastic element 2213.

[0075] In this embodiment, the control unit 24 can obtain the current position of the baffle 28 (i.e., the current position of the wedge block 2211) through the detection results, and control the drive assembly 211 / drive body 2111 to stop operating when it determines that the baffle 28 is at the limit of the detection range formed by the multiple position detection units 18, so as to avoid the wedge block 2211 / wedge nut 2121 from exceeding the pre-designed working range and colliding with other components, thereby causing damage. The number of position detection units 18 and circuit boards 26 can be, but is not limited to, two, and the position detection units 18 and circuit boards 26 are set one-to-one. The number and correspondence of position detection units 18 and circuit boards 26 can be adjusted according to actual needs. When the number of position detection units 18 is more, the control unit 24 obtains the current position of the baffle 28 (i.e., the current position of the wedge block 2211) through the multiple position detection units 18 more accurately.

[0076] Please see Figures 19 to 22 , Figure 19 This is a perspective view of a fourth embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 20 for Figure 19 Explosion diagram, Figure 21 for Figure 19 A three-dimensional view of the combination of drive components and transmission components. Figure 22 for Figure 19 A three-dimensional diagram of the combination of the linkage support component and the lifting component. Figures 19 to 22 Implementation examples and Figures 10 to 13 The difference between the embodiments is that, Figures 19 to 22The first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121 are not planar. Specifically, the first inclined surface 14 of the wedge block 2211 has a groove 14a, and the second inclined surface 15 of the wedge nut 2121 has a ridge 15a. The groove 14a and the ridge 15a are positioned correspondingly. When the wedge nut 2121 pushes the wedge block 2211 by means of the second inclined surface 15, the ridge 15a slides in the groove 14a, so that the wedge nut 2121 is used to push the wedge block 2211. The number of ridges 15a and grooves 14a is the same (e.g., three) and they are arranged one-to-one. The number of ridges 15a and grooves 14a can be adjusted according to actual needs. The arrangement of ridges 15a and grooves 14a can enhance the frictional area and frictional force between the first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121, resulting in a self-locking phenomenon.

[0077] Please see Figure 23 and Figure 24 , Figure 23 This is a perspective view of the fifth embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 24 for Figure 23 Exploded view. Figure 23 and Figure 24 Implementation examples and Figures 15 to 18 The difference between the embodiments is that, Figure 23 and Figure 24 The first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121 are not planar. Because... Figure 23 and Figure 24 The design of the first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121 Figures 19 to 22 The design of the first inclined surface 14 of the wedge block 2211 is the same as that of the second inclined surface 15 of the wedge nut 2121, so it will not be described again here.

[0078] Please see Figures 25 to 28 , Figure 25 This is a perspective view of the sixth embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 26 for Figure 25 Explosion diagram, Figure 27 for Figure 26 A three-dimensional view of the combination of drive components and transmission components. Figure 28 for Figure 26 A three-dimensional diagram of the combination of the linkage support component and the lifting component. Figures 25 to 28 Implementation examples and Figures 10 to 13 The difference between the embodiments is that, Figures 25 to 28The first inclined surface 14 of the wedge block 2211 and the second inclined surface 15 of the wedge nut 2121 are not planar. Specifically, the second inclined surface 15 of the wedge nut 2121 has a guide groove 15b, and the first inclined surface 14 of the wedge block 2211 is provided with protruding teeth 14b. The protruding teeth 14b include a main protruding tooth 20a standing on the first inclined surface 14 and a secondary protruding tooth 20b extending from the top of the main protruding tooth 20a. When the wedge nut 2121 moves in a direction parallel to the bottom cover 12 (i.e., the Y-axis direction), the main protruding tooth 20a slides relative to the guide groove 15b, and the orthographic projection of the secondary protruding tooth 20b on the second inclined surface 15 at least partially overlaps with the area outside the guide groove 15b on the second inclined surface 15. The linkage support assembly 221 provides the static support force to the lifting assembly 222 by means of the secondary protruding tooth 20b. By setting the secondary convex tooth 20b (i.e., the projected area of ​​the secondary convex tooth 20b on the second inclined surface 15 covers at least part of the area outside the guide groove 15b on the second inclined surface 15), when the drive component 211 does not drive the lifting component 222 to move, the wedge block 2211 will not fall down due to gravity because of the setting of the secondary convex tooth 20b, thereby allowing the lifting component 222 to maintain its current state; the main convex tooth 20a and the secondary convex tooth 20b can, for example, form a T-shaped tooth.

[0079] Furthermore, since the convex tooth 14b is designed as a T-shaped tooth, the wedge nut 2121 can directly drive the wedge block 2211 whether it moves along the positive Y-axis or the negative Y-axis. The elastic element 2213 is only used to maintain the stability of the lifting assembly 222, and does not need to bear the force of the lifting assembly 222 moving along the positive Z-axis.

[0080] As can be seen from the angle adjustment module 2 in the first to sixth embodiments above, the drive body 2111 drives the wedge nut 2121 to translate along the Y-axis direction by the drive shaft 2112, thereby driving the support rod 2221 to move along the Z-axis direction. Therefore, the drive device 21 of the angle adjustment module 2 can be designed to be placed horizontally, eliminating the need for the drive body 2111 to directly drive the support rod 2221 in the Z-axis direction, making the design of the projection device 1 more flexible.

[0081] Please see Figures 29 to 32 , Figure 29 This is a perspective view of the seventh embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 30 for Figure 29 Explosion diagram, Figure 31 for Figure 29 Cross-sectional view of the midline segment DD' Figure 32 for Figure 31 A schematic diagram showing the lifting assembly moving outwards from the projection device. (See diagram.) Figures 29 to 32As shown, the angle adjustment module 3 includes a drive device 31 and a lifting device 32. The drive device 31 is disposed inside the projection device (not shown) and includes a drive assembly 311 and a transmission assembly 312. The lifting device 32 includes a linkage support assembly 321 and a lifting assembly 322. The drive assembly 311 is disposed on the bottom cover 30 of the projection device, and one end of the transmission assembly 312 is connected to the drive assembly 311. The lifting assembly 322 passes through the opening 30a of the bottom cover 30 and moves relative to the bottom cover 30 in a direction perpendicular to the bottom cover 30 (i.e., the Z-axis direction) to adjust the elevation angle of the projection device (e.g., the angle of the projection device). Figure 31 and Figure 32 (As shown); the linkage support assembly 321 is disposed within the projection device, and is connected to one end of the lifting assembly 322 located within the projection device and the other end of the transmission assembly 312, respectively, to drive the lifting assembly 322 to move relative to the bottom cover 30 and to provide static support force for the lifting assembly 322. The static support force is the force that allows the lifting assembly 322 to maintain its current state when the driving assembly 311 is not driving the lifting assembly 322 to move.

[0082] Please see Figure 33 , it is Figure 29 The circuit block diagram of the angle adjustment module. (Example) Figure 33 As shown, the angle adjustment module 3 may further include a control unit 34, which is connected to the drive component 311 and disposed at any position within the projection device. In one embodiment, the angle adjustment module 3 may further include an image-capturing unit 33, which is connected to the control unit 34. The image-capturing unit 33 is used to capture an image corresponding to the projected image of the projection device and transmit the captured image to the control unit 34, so that the control unit 34 controls the drive component 311 based on the captured image, thereby adjusting the projected image. The control unit 34 may be, for example, a central processing unit, microprocessor, digital signal processor, programmable controller, programmable logic device, or other similar device or a combination of these devices, but is not limited thereto; the control unit 34 can control the drive amount of the drive component 311 to adjust the operation of the lifting component 322 accordingly; the control unit 34 can also control the drive component 311 at any time based on the degree of distortion of the actual projected image in the captured image, thereby adjusting the operation of the lifting component 322 to meet the fully automatic real-time dynamic adjustment of the projected image of the projection device (i.e., automatic adjustment of projected image skew). It should be noted that, to avoid Figures 29 to 32 The diagram is too complex; the electrical connections of the control unit 34 and any components within the projection device are only shown on [the drawing site]. Figure 33 middle.

[0083] Please see Figures 29 to 32The drive assembly 311 may include a drive body 3111 and a drive shaft 3112. The drive body 3111 drives the drive shaft 3112 to rotate, and the drive shaft 3112 is connected to the transmission assembly 312. Specifically, the drive body 3111 may be, but is not limited to, a drive motor, and the drive shaft 3112 may be, but is not limited to, a lead screw with external threads. The drive shaft 3112 is screwed to the transmission assembly 312. The transmission assembly 312 may include a nut 3121, which may have an opening 40 for rotatably engaging with the drive shaft 3112. Specifically, the opening 40 has an internal thread, allowing it to rotatably engage with the lead screw, which serves as the drive shaft 3112. The friction angle between the external thread of the lead screw and the internal thread of the opening 40 can create a self-locking phenomenon, ensuring that the nut 3121 will not be pushed back when power to the drive body 3111 is stopped or the drive body 3111 stops operating. Figure 31 The location.

[0084] The linkage support assembly 321 may include a connecting rod 3211, with its two ends pivotally connected to the support rod 3221 and the nut 3121 of the lifting assembly 322, respectively. When the drive body 3111 drives the nut 3121 to translate along the direction parallel to the bottom cover 30 (i.e., the Y-axis direction) via the drive shaft 3112, the nut 3121 drives the support rod 3221 via the connecting rod 3211, causing the support rod 3221 to move along the direction perpendicular to the bottom cover 30 (i.e., the Z-axis direction). The two ends of the connecting rod 3211 are pivotally connected to the support rod 3221 and the nut 3121 via pins 35 (i.e., the connecting rod 3211 and the support rod 3221 are pivotally connected via pins 35, and the connecting rod 3211 and the nut 3121 are pivotally connected via another pin 35). For example, when the drive body 3111 drives the drive shaft 3112 to rotate counterclockwise, the drive shaft 3112 drives the nut 3121 to move in the positive Y-axis direction (i.e., the angle adjustment module 3 is moved from the positive Y-axis direction). Figure 31 Action to Figure 32 Nut 3121 pulls connecting rod 3211, which rotates counterclockwise, causing support rod 3221 to move along the negative Z-axis. When drive body 3111 drives drive shaft 3112 to rotate clockwise, drive shaft 3112 causes nut 3121 to move along the negative Y-axis (i.e., angle adjustment module 3 moves from the angle adjustment module 3 to the angle adjustment module 3). Figure 32 Action to Figure 31 Nut 3121 pushes connecting rod 3211, which rotates clockwise, causing support rod 3221 to move along the positive Z-axis.

[0085] Due to the friction between the drive shaft 3112 and the nut 3121, the nut 3121 will automatically stop moving and remain in its original position when the driving force is stopped. This self-locking phenomenon prevents the nut 3121 and the connecting rod 3211 from moving accidentally.

[0086] In addition, please see Figures 29 to 33 The nut 3121 may have a baffle 36; the angle adjustment module 3 may also include a plurality of position detection units 38 disposed on the vertical plate 37 of the bottom cover 30, and the control unit 34 is electrically connected to the plurality of position detection units 38; the plurality of position detection units 38 are located on at least one side of the movement trajectory of the baffle 36 and are used to detect the current position of the baffle 36 and transmit the detection result to the control unit 34 so that the control unit 34 controls the drive assembly 311 / drive body 3111 based on the detection result. The vertical plate 37 may have an opening 37a and be integrally formed with the bottom cover 30, but is not limited thereto; the angle adjustment module 3 may also include multiple circuit boards 39, multiple screws 13 and multiple spacers 27; the multiple spacers 27 are disposed between the multiple circuit boards 39 and the vertical plate 37; multiple position detection units 38 are disposed on the multiple circuit boards 39 and face the vertical plate 37, and the opening 37a exposes the multiple position detection units 38 so that the multiple position detection units 38 are located on at least one side of the movement trajectory of the baffle 36; the multiple circuit boards 39, the multiple spacers 27 and the vertical plate 37 are locked together by the multiple screws 13, but this embodiment is not intended to limit the invention.

[0087] In this embodiment, the control unit 34 can obtain the current position of the baffle 36 (i.e., the current position of the nut 3121) through the detection results, and control the drive assembly 311 / drive body 3111 to stop operating when it determines that the baffle 36 is at the limit of the detection range formed by multiple position detection units 38, so as to avoid the nut 3121 from exceeding the pre-designed working range and colliding with other components, thereby causing damage. Among them, the position detection unit 38 can be, but is not limited to, an infrared detection unit, a laser ranging unit, or an image capturing unit. The number of position detection units 38 and circuit boards 39 can be, but is not limited to, two and can be set one-to-one. The number of position detection units 38 and circuit boards 39 can be adjusted according to actual needs. When the number of position detection units 38 is more, the control unit 34 obtains the current position of the baffle 36 (i.e., the current position of the nut 3121) through the multiple position detection units 38 more accurately.

[0088] Please see Figures 34 to 38 , Figure 34 This is a perspective view of the eighth embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 35 for Figure 34 Explosion diagram, Figure 36 for Figure 34 Cross-sectional view of the middle segment EE' Figure 37 for Figure 36 A schematic diagram showing the lifting assembly moving towards the outside of the projection device. Figure 38 for Figure 37 A three-dimensional schematic diagram. For example... Figures 34 to 38As shown, the angle adjustment module 4 includes a drive device 41 and a lifting device 42. The drive device 41 is disposed inside the projection device (not shown) and includes a drive assembly 411 and a transmission assembly 412. The lifting device 42 includes a linkage support assembly 421 and a lifting assembly 422. The drive assembly 411 is disposed on the bottom cover 50 of the projection device, and one end of the transmission assembly 412 is connected to the drive assembly 411. The lifting assembly 422 passes through the opening 50a of the bottom cover 50 and moves relative to the bottom cover 50 in a direction perpendicular to the bottom cover 50 (i.e., the Z-axis direction) to adjust the elevation angle of the projection device (e.g., as shown in the diagram). Figure 36 and Figure 37 (As shown); the linkage support assembly 421 is disposed within the projection device, and is connected to one end of the lifting assembly 422 located within the projection device and the other end of the transmission assembly 412, respectively, to drive the lifting assembly 422 to move relative to the bottom cover 50 and to provide static support force for the lifting assembly 422. The static support force is the force that allows the lifting assembly 422 to maintain its current state when the driving assembly 411 is not driving the lifting assembly 422 to move.

[0089] Please see Figure 39 , it is Figure 34 The circuit block diagram of the angle adjustment module. (Example) Figure 39 As shown, the angle adjustment module 4 may further include a control unit 44, which is connected to the drive component 411 and disposed at any position within the projection device. In one embodiment, the angle adjustment module 4 may further include an image-capturing unit 43, which is connected to the control unit 44. The image-capturing unit 43 is used to capture an image corresponding to the projected image of the projection device and transmit the captured image to the control unit 44, so that the control unit 44 controls the drive component 411 based on the captured image, thereby adjusting the projected image. The control unit 44 may be, for example, a central processing unit, a microprocessor, a digital signal processor, a programmable controller, a programmable logic device, or other similar devices or combinations thereof, but is not limited thereto; the control unit 44 can control the drive amount of the drive component 411 to adjust the operation of the lifting component 422 accordingly; the control unit 44 can also control the drive component 411 at any time based on the degree of distortion of the actual projected image in the captured image, thereby adjusting the operation of the lifting component 422 to meet the fully automatic real-time dynamic adjustment of the projected image of the projection device (i.e., automatic adjustment of projected image skew). It should be noted that, to avoid Figures 34 to 38 The diagram is too complex; the electrical connections of the control unit 44 and any components within the projection device are only shown on [the drawing site]. Figure 39 middle.

[0090] Please see Figures 34 to 38The drive assembly 411 may include a drive body 4111 and a drive shaft 4112. The drive body 4111 drives the drive shaft 4112 to rotate, and the drive shaft 4112 is connected to the transmission assembly 412. The drive body 4111 may be, but is not limited to, a drive motor. Furthermore, the transmission assembly 412 may include a cam 4121, with its locking point P locked to the drive shaft 4112. The rotation of the drive shaft 4112 drives the rotation of the cam 4121. The locking point P is located between the first end 96a and the second end 96b of the cam 4121, and the distance between the first end 96a and the locking point P is greater than the distance between the second end 96b and the locking point P. The linkage support assembly 421 may include an elastic element 4211 and a top plate 4212 connected to the support rod 4221 of the lifting assembly 422. The elastic element 4211 is sleeved on the support rod 4221 and has two sides... The top plate 4212 and the bottom cover 50 are respectively abutted, and one end of the support rod 4221 can be screwed to the top plate 4212; when the drive body 4111 drives the cam 4121 to rotate by the drive shaft 4112, the first end 96a of the cam 4121 presses the top plate 4212 and compresses the elastic element 4211, or the second end 96b of the cam 4121 contacts the top plate 4212 and the restoring force of the elastic element 4211 pushes the top plate 4212, so that the support rod 4221 moves in a direction perpendicular to the bottom cover 50 (i.e., the Z-axis direction); the elastic element 4211 can provide the static support force to the lifting assembly 422.

[0091] Specifically, when the drive body 4111 drives the cam 4121 to rotate via the drive shaft 4112, and the first end 96a of the cam 4121 presses against the top plate 4212 (i.e., the angle adjustment module 4 is driven by the cam 4121), the cam 4121 rotates via the drive shaft 4112. Figure 34 Action to Figure 38 When the first end 96a of the cam 4121 presses against the top plate 4212, the force is greater than the sum of the elastic force of the elastic element 4211 and the weight of the projection device carried by the lifting assembly 422. This causes the cam 4121 to drive the support rod 4221 to move along the negative Z-axis and compress the elastic element 4211. When the drive body 4111 drives the cam 4121 to rotate via the drive shaft 4112, and the second end 96b of the cam 4121 presses against the top plate 4212 (i.e., the angle adjustment module 4 is driven by the cam 4211), the cam 4121 rotates. Figure 38 Action to Figure 34 When the elastic element 4211 is in operation, the restoring force of the elastic element 4211 pushes the top plate 4212, allowing the lifting assembly 422 to move along the positive Z-axis direction. Therefore, the setting of the elastic element 4211 can enable the support rod 4221 to move along the direction perpendicular to the bottom cover 50 (i.e., the Z-axis direction), while providing the static support force for the lifting assembly 422.

[0092] In addition, please see Figures 34 to 39The top plate 4212 may have a baffle 45; the angle adjustment module 4 may also include a plurality of position detection units 47 disposed on the vertical plate 46 of the bottom cover 50, and the control unit 44 is connected to the plurality of position detection units 47; the plurality of position detection units 47 are located on at least one side of the movement trajectory of the baffle 45 and are used to detect the current position of the baffle 45 and transmit the detection result to the control unit 44 so that the control unit 44 controls the drive assembly 411 / drive body 4111 based on the detection result. The vertical plate 46 may be integrally formed with the bottom cover 50, but is not limited thereto; the angle adjustment module 4 may also include a plurality of circuit boards 48 and a plurality of screws 13; the plurality of position detection units 47 are disposed on the plurality of circuit boards 48 and are located on at least one side of the movement trajectory of the baffle 45; the plurality of circuit boards 48 and the vertical plate 46 are locked together by the plurality of screws 13, but this embodiment is not intended to limit the invention.

[0093] In this embodiment, the control unit 44 can obtain the current position of the baffle 45 (i.e., the current position of the top plate 4212) through the detection results, and when it determines that the baffle 45 is at the limit of the detection range formed by the multiple position detection units 47, it controls the drive assembly 411 / drive body 4111 to stop operating, so as to avoid the top plate 4212 from exceeding the pre-designed working range and colliding with other components, thereby causing damage. Among them, the position detection unit 47 can be, but is not limited to, an infrared detection unit, a laser ranging unit, or an image capturing unit. The position detection unit 47 and the circuit board 48 are set one-to-one. The number of position detection units 47 and circuit boards 48 can be, but is not limited to, two. The number and correspondence of position detection units 47 and circuit boards 48 can be adjusted according to actual needs. When the number of position detection units 47 is more, the control unit 44 obtains the current position of the baffle 45 (i.e., the current position of the top plate 4212) through the multiple position detection units 47 more accurately.

[0094] Please see Figures 40 to 44 , Figure 40 This is a perspective view of the ninth embodiment of the angle adjustment module of the present invention applied to a projection device. Figure 41 for Figure 40 Explosion diagram, Figure 42 for Figure 40 Cross-sectional view of the midline segment FF' Figure 43 for Figure 42 A schematic diagram showing the lifting assembly moving towards the outside of the projection device. Figure 44 for Figure 43 A three-dimensional schematic diagram. For example... Figures 40 to 44As shown, the angle adjustment module 5 includes a drive device 51 and a lifting device 52. The drive device 51 is disposed within the projection device (not shown) and includes a drive assembly 511 and a transmission assembly 512. The lifting device 52 includes a linkage support assembly 521 and a lifting assembly 522. The drive assembly 511 is disposed on the bottom cover 60 of the projection device, and one end of the transmission assembly 512 is connected to the drive assembly 511. The lifting assembly 522 passes through the opening 60a of the bottom cover 60 and moves relative to the bottom cover 60 in a direction perpendicular to the bottom cover 60 (i.e., the Z-axis direction) to adjust the elevation angle of the projection device (e.g., the angle of the projection device). Figure 42 and Figure 43 (As shown); the linkage support assembly 521 is disposed within the projection device, and is connected to one end of the lifting assembly 522 located within the projection device and the other end of the transmission assembly 512, respectively, to drive the lifting assembly 522 to move relative to the bottom cover 60 and to provide static support force for the lifting assembly 522. The static support force is the force that allows the lifting assembly 522 to maintain its current state when the driving assembly 511 is not driving the lifting assembly 522 to move.

[0095] Please see Figure 45 , it is Figure 40 The circuit block diagram of the angle adjustment module. (Example) Figure 45 As shown, the angle adjustment module 5 may further include a control unit 54, which is connected to the drive component 511 and disposed at any position within the projection device. In one embodiment, the angle adjustment module 5 may further include an image-capturing unit 53, which is connected to the control unit 54. The image-capturing unit 53 is used to capture an image corresponding to the projected image of the projection device and transmit the captured image to the control unit 54, so that the control unit 54 controls the drive component 511 based on the captured image, thereby adjusting the projected image. The control unit 54 may be, for example, a central processing unit, a microprocessor, a digital signal processor, a programmable controller, a programmable logic device, or other similar devices or combinations thereof, but is not limited thereto; the control unit 54 can control the drive amount of the drive component 511 to adjust the operation of the lifting component 522 accordingly; the control unit 54 can also control the drive component 511 at any time based on the degree of distortion of the actual projected image in the captured image, thereby adjusting the operation of the lifting component 522 to meet the fully automatic real-time dynamic adjustment of the projected image of the projection device (i.e., automatic adjustment of the projected image skew). It should be noted that, in order to avoid Figures 40 to 44 The diagram is too complex; the electrical connections of the control unit 54 and any components within the projection device are only shown on [the drawing site]. Figure 45 middle.

[0096] Please see Figures 40 to 44The drive assembly 511 may include a drive body 5111 and a drive shaft 5112. The drive body 5111 is used to drive the drive shaft 5112 to rotate, and the drive shaft 5112 is connected to the transmission assembly 512. The drive body 5111 may be, but is not limited to, a drive motor. In addition, the transmission assembly 512 may include a cam 5121 and a protrusion 5122. One end of the cam 5121 is locked to the drive shaft 5112, and the protrusion 5122 is disposed at the other end of the cam 5121 (i.e., the protrusion 5122 is the eccentric protrusion of the cam 5121). The drive shaft 5112 is used to drive the cam 5121 to rotate. The linkage support assembly 521 includes a transmission plate 5211 connected to the support rod 5221 of the lifting assembly 522. The transmission plate 5211 is provided with a horizontal guide groove 55. The protrusion 5122 is slidably engaged with the horizontal guide groove 55. The protrusion 5122 is used to slide in the horizontal guide groove 55. One end of the support rod 5221 can be screwed to the transmission plate 5211. When the drive body 5111 drives the cam 5121 to rotate by the drive shaft 5112, the protrusion 5122 slides relative to the horizontal guide groove 55, so that the support rod 5221 moves in a direction perpendicular to the bottom cover 60.

[0097] Specifically, when the drive body 5111 drives the cam 5121 to rotate clockwise via the drive shaft 5112, the protrusion 5122 slides relative to the horizontal guide groove 55 due to the rotation of the cam 5121 (i.e., the angle adjustment module 5 is driven by the cam 5121 to rotate clockwise). Figure 40 Action to Figure 44 When the cam 5121 rotates clockwise, the force that causes the cam 5122 to press against the transmission plate 5211 is greater than the weight of the projection device carried by the lifting assembly 522, thus causing the cam 5121 to drive the support rod 5221 to move along the negative Z-axis; when the drive body 5111 drives the cam 5121 to rotate counterclockwise via the drive shaft 5112, the cam 5122 slides relative to the horizontal guide groove 55 due to the rotation of the cam 5121 (i.e., the angle adjustment module 5 is driven by the cam 5121 to rotate counterclockwise). Figure 44 Action to Figure 40 When the cam 5121 rotates counterclockwise, it drives the cam 5122 to pull the transmission plate 5211 along the positive Z-axis, so that the support rod 5221 of the lifting assembly 522 can move along the positive Z-axis.

[0098] In addition, please see Figures 40 to 45The transmission plate 5211 may have a baffle 56; the angle adjustment module 5 may also include a plurality of position detection units 58 disposed on the vertical plate 57 of the bottom cover 60, and the control unit 54 is connected to the plurality of position detection units 58; the plurality of position detection units 58 are located on at least one side of the movement trajectory of the baffle 56 and are used to detect the current position of the baffle 56 and transmit the detection result to the control unit 54 so that the control unit 54 controls the drive assembly 511 / drive body 5111 based on the detection result. The vertical plate 57 may have an opening 57a and may be integrally formed with the bottom cover 60, but is not limited thereto; the angle adjustment module 5 may also include a plurality of circuit boards 59 and a plurality of screws 13; the plurality of circuit boards 59 are locked together with the vertical plate 57 by the plurality of screws 13; the plurality of position detection units 58 are disposed on the plurality of circuit boards 59, and the opening 57a exposes the plurality of position detection units 58 so that the plurality of position detection units 58 are located on at least one side of the movement trajectory of the baffle 56, but this embodiment is not intended to limit the invention.

[0099] In this embodiment, the control unit 54 can obtain the current position of the baffle 56 (i.e., the current position of the transmission plate 5211) through the detection results, and control the drive assembly 511 / drive body 5111 to stop operating when it determines that the baffle 56 is at the limit of the detection range formed by multiple position detection units 58, so as to avoid the transmission plate 5211 from exceeding the pre-designed working range and colliding with other components, thereby causing damage. Among them, the position detection unit 58 can be, but is not limited to, an infrared detection unit, a laser ranging unit, or an image capturing unit. The position detection unit 58 and the circuit board 59 are set one-to-one. The number of position detection units 58 and circuit boards 59 can be, but is not limited to, two. The number and correspondence of position detection units 58 and circuit boards 59 can be adjusted according to actual needs. When the number of position detection units 58 is more, the control unit 54 obtains the current position of the baffle 56 (i.e., the current position of the transmission plate 5211) through the multiple position detection units 58 more accurately.

[0100] In summary, the angle adjustment module and projection device of the embodiments of the present invention have at least one of the following advantages: By driving the transmission component through the drive component, the transmission component actuates the linkage support component, thereby moving the lifting component relative to the bottom cover, which improves the inconvenience of adjusting the projection elevation angle in existing projection devices. By adjusting the lifting component's actuation according to the driving amount of the drive component, which is a stepless adjustment, the height of the lifting component extending out of the projection device can be more precisely controlled, thus improving the poor efficiency of projection elevation angle adjustment in existing projection devices. The design of the linkage support component connecting to one end of the lifting component located inside the projection device prevents the lifting component from detaching from the bottom of the projection device. The lateral placement design of the drive component eliminates the need to directly drive the support rod of the lifting component along the thickness direction of the projection device, making the projection device design more flexible. The inclusion of a position detection unit prevents the transmission component and linkage support component from exceeding the pre-designed working range and colliding with other components, thus preventing damage. The inclusion of an image acquisition unit and a control unit enables fully automatic real-time dynamic adjustment of the projected image. The projection device features multiple angle adjustment modules to correct skewed projected images from different directions. The self-locking mechanism between the drive and transmission components prevents the transmission and linkage support components from being pushed back to their original positions (i.e., the positions of the transmission and linkage support components when the lifting component's support rod has not moved outwards from the projection device) due to power outages or the drive component ceasing operation.

[0101] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent variations and modifications made in accordance with the claims and description of the invention are still within the scope of this patent. Furthermore, no embodiment or claim of the present invention needs to achieve all the objectives, advantages, or features disclosed in the invention. In addition, the abstract and headings are merely for assisting in patent document retrieval and are not intended to limit the scope of the invention. Moreover, the terms "first," "second," etc., used in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. An angle adjustment module, characterized in that, Suitable for a projection device, the projection device including a bottom cover having an opening, the angle adjustment module including: A driving device, disposed within the projection device, includes a driving assembly and a transmission assembly. The driving assembly is mounted on the bottom cover, and one end of the transmission assembly is connected to the driving assembly. A lifting device includes a linkage support assembly and a lifting assembly; the lifting assembly passes through the opening of the bottom cover and moves relative to the bottom cover in a direction perpendicular to the bottom cover to adjust the elevation angle of the projection device; the linkage support assembly is disposed inside the projection device, and the linkage support assembly is connected to one end of the lifting assembly located inside the projection device and the other end of the transmission assembly, respectively, to drive the lifting assembly to move relative to the bottom cover and provide static support force for the lifting assembly.

2. The angle adjustment module according to claim 1, characterized in that, The drive assembly includes a drive body and a drive shaft. The drive body is used to drive the drive shaft to rotate, and the drive shaft is connected to the transmission assembly.

3. The angle adjustment module according to claim 2, characterized in that, The transmission assembly includes a wedge-shaped nut having an opening for rotatably engaging with the drive shaft; The angle adjustment module further includes a fixing plate, which is fixed to a plurality of fixing posts on the bottom cover. The plurality of fixing posts are arranged around the support boss of the bottom cover for supporting the wedge-shaped nut. The fixing plate, the support boss of the bottom cover, and the plurality of fixing posts enable the wedge-shaped nut to translate in a direction parallel to the bottom cover. The linkage support assembly includes a wedge block, and the lifting assembly includes a support rod locked to the wedge block. The first inclined surface of the wedge block is parallel to the second inclined surface of the wedge-shaped nut. When the drive body drives the wedge-shaped nut to translate in a direction parallel to the bottom cover via the drive shaft, the wedge-shaped nut pushes the wedge block via the second inclined surface, causing the support rod to move in a direction perpendicular to the bottom cover.

4. The angle adjustment module according to claim 3, characterized in that, The linkage support assembly further includes an elastic element, which is sleeved on the support rod and its two sides respectively abut against the wedge block and the bottom cover; when the wedge nut moves in a direction parallel to the bottom cover, the wedge nut compresses the elastic element by pushing the wedge block, or pushes the wedge block by the restoring force of the elastic element; the elastic element is used to provide the static support force to the lifting assembly.

5. The angle adjustment module according to claim 4, characterized in that, The first inclined surface of the wedge block has a groove, and the second inclined surface of the wedge nut has a ridge. The groove and the ridge are positioned opposite each other. When the wedge nut pushes the wedge block by means of the second inclined surface, the ridge slides in the groove, so that the wedge nut is used to push the wedge block.

6. The angle adjustment module according to claim 3, characterized in that, The linkage support assembly also includes a fastening nut, one end of the support rod passes through the wedge block and is screwed into the fastening nut.

7. The angle adjustment module according to claim 3, characterized in that, The fixing plate has a linear groove, and the top of the wedge nut has a baffle. When the wedge nut moves in a direction parallel to the bottom cover, the baffle moves along the linear groove. The angle adjustment module also includes a plurality of position detection units disposed on the fixing plate and a control unit connected to the plurality of position detection units. The plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle and transmit the detection result to the control unit, thereby enabling the control unit to control the drive component based on the detection result.

8. The angle adjustment module according to claim 3, characterized in that, The second inclined surface has a guide groove, and the first inclined surface is provided with protruding teeth, the protruding teeth including a main protruding tooth standing on the first inclined surface and a secondary protruding tooth extending from the top of the main protruding tooth; when the wedge-shaped nut moves in a direction parallel to the bottom cover, the main protruding tooth slides relative to the guide groove, and the orthographic projection of the secondary protruding tooth on the second inclined surface at least partially overlaps with the area outside the guide groove on the second inclined surface; The linkage support assembly provides the static support force to the lifting assembly via the secondary tooth.

9. The angle adjustment module according to claim 8, characterized in that, The main convex tooth and the secondary convex tooth form a T-shaped tooth.

10. The angle adjustment module according to claim 2, characterized in that, The transmission assembly includes a nut with an opening for rotatably engaging with the drive shaft; the linkage support assembly includes a connecting rod with its two ends pivotally connected to the support rod of the lifting assembly and the nut, respectively; when the drive body drives the nut to translate in a direction parallel to the bottom cover via the drive shaft, the nut drives the support rod via the connecting rod, causing the support rod to move in a direction perpendicular to the bottom cover.

11. The angle adjustment module according to claim 10, characterized in that, The nut has a baffle; the angle adjustment module further includes a plurality of position detection units disposed on the vertical plate of the bottom cover and a control unit connected to the plurality of position detection units; the plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle and transmit the detection results to the control unit so that the control unit controls the drive component based on the detection results.

12. The angle adjustment module according to claim 2, characterized in that, The transmission assembly includes a cam, the locking point of which is locked to the drive shaft, and the rotation of the drive shaft drives the rotation of the cam. The linkage support assembly includes an elastic element and a top plate connected to the support rod of the lifting assembly. The elastic element is sleeved on the support rod and its two sides abut against the top plate and the bottom cover, respectively. When the drive body drives the cam to rotate via the drive shaft, the first end of the cam presses against the top plate and compresses the elastic element, or the second end of the cam contacts the top plate and the restoring force of the elastic element pushes the top plate, so that the support rod moves in a direction perpendicular to the bottom cover. The locking point is located between the first end and the second end, and the distance between the first end and the locking point is greater than the distance between the second end and the locking point. The elastic element is used to provide the static support force to the lifting assembly.

13. The angle adjustment module according to claim 2, characterized in that, The transmission assembly includes a cam and a protrusion. One end of the cam is locked to the drive shaft, and the protrusion is disposed at the other end of the cam. The drive shaft is used to drive the cam to rotate. The linkage support assembly includes a transmission plate connected to the support rod of the lifting assembly. The transmission plate is provided with a horizontal guide groove, and the protrusion is used to slide in the horizontal guide groove. When the drive body drives the cam to rotate by the drive shaft, the protrusion slides relative to the horizontal guide groove, so that the support rod moves in a direction perpendicular to the bottom cover.

14. The angle adjustment module according to claim 1, characterized in that, The linkage support assembly has a baffle on one side; the angle adjustment module further includes a plurality of position detection units disposed on the vertical plate of the bottom cover and a control unit connected to the plurality of position detection units; the plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle, and transmit the detection result to the control unit so that the control unit controls the drive assembly based on the detection result.

15. The angle adjustment module according to claim 1, characterized in that, The angle adjustment module further includes an image capturing unit and a control unit. The image capturing unit is connected to the control unit, and the control unit is connected to the driving component. The image capturing unit is used to capture an image corresponding to the projected image of the projection device and transmit the captured image to the control unit, so that the control unit controls the driving component based on the captured image, thereby adjusting the projected image.

16. A projection device, characterized in that, The projection device includes: A bottom cover having an opening; and Angle adjustment module, including: A driving device, disposed within the projection device, comprises a driving assembly and a transmission assembly. The driving assembly is mounted on the bottom cover, and one end of the transmission assembly is drivably connected to the driving assembly. A lifting device includes a linkage support assembly and a lifting assembly; the lifting assembly passes through the opening and moves relative to the projection device in a direction perpendicular to the bottom cover to adjust the elevation angle of the projection device; the linkage support assembly is disposed inside the projection device, and the linkage support assembly is connected to one end of the lifting assembly located inside the projection device and the other end of the transmission assembly to drive the lifting assembly to move relative to the bottom cover and provide static support force for the lifting assembly.

17. The projection device according to claim 16, characterized in that, The drive assembly includes a drive body and a drive shaft. The drive body is used to drive the drive shaft to rotate, and the drive shaft is connected to the transmission assembly.

18. The projection device according to claim 17, characterized in that, The transmission assembly includes a wedge-shaped nut with an opening for rotatably engaging with the drive shaft. The bottom cover also has a support boss for supporting the wedge-shaped nut and multiple fixing posts around the support boss. The angle adjustment module further includes a fixing plate fixed to the multiple fixing posts. The wedge-shaped nut is moved in a direction parallel to the bottom cover by means of the fixing plate, the support boss of the bottom cover, and the multiple fixing posts. The linkage support assembly includes a wedge block, and the lifting assembly includes a support rod locked to the wedge block. The first inclined surface of the wedge block is parallel to the second inclined surface of the wedge-shaped nut. When the drive body drives the wedge-shaped nut to move in a direction parallel to the bottom cover by means of the drive shaft, the wedge-shaped nut pushes the wedge block by means of the second inclined surface, so that the support rod moves in a direction perpendicular to the bottom cover.

19. The projection device according to claim 18, characterized in that, The linkage support assembly further includes an elastic element, which is sleeved on the support rod and its two sides respectively abut against the wedge block and the bottom cover; when the wedge nut moves in a direction parallel to the bottom cover, the wedge nut compresses the elastic element by pushing the wedge block, or pushes the wedge block by the restoring force of the elastic element; the elastic element is used to provide the static support force to the lifting assembly.

20. The projection device according to claim 19, characterized in that, The first inclined surface has a groove, and the second inclined surface has a ridge. The groove and the ridge are positioned corresponding to each other. When the wedge nut pushes the wedge block by means of the second inclined surface, the ridge slides in the groove, so that the wedge nut is used to push the wedge block.

21. The projection device according to claim 18, characterized in that, The second inclined surface has a guide groove, and the first inclined surface is provided with protruding teeth, the protruding teeth including a main protruding tooth standing on the first inclined surface and a secondary protruding tooth extending from the top of the main protruding tooth; when the wedge-shaped nut moves in a direction parallel to the bottom cover, the main protruding tooth slides relative to the guide groove, and the orthographic projection of the secondary protruding tooth on the second inclined surface at least partially overlaps with the area outside the guide groove on the second inclined surface; The linkage support assembly provides the static support force to the lifting assembly via the secondary tooth.

22. The projection device according to claim 18, characterized in that, The linkage support assembly also includes a fastening nut, one end of the support rod passes through the wedge block and is screwed into the fastening nut.

23. The projection device according to claim 18, characterized in that, The fixing plate has a linear groove, and the top of the wedge nut has a baffle. When the wedge nut moves in a direction parallel to the bottom cover, the baffle moves along the linear groove. The angle adjustment module also includes a plurality of position detection units disposed on the fixing plate and a control unit connected to the plurality of position detection units. The plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle and transmit the detection results to the control unit, thereby enabling the control unit to control the drive component based on the detection results.

24. The projection device according to claim 17, characterized in that, The transmission assembly includes a nut with an opening for rotatably engaging with the drive shaft; the linkage support assembly includes a connecting rod with its two ends pivotally connected to the support rod of the lifting assembly and the nut, respectively; when the drive body drives the nut to translate in a direction parallel to the bottom cover via the drive shaft, the nut drives the support rod via the connecting rod, causing the support rod to move in a direction perpendicular to the bottom cover.

25. The projection device according to claim 24, characterized in that, The nut has a baffle; the angle adjustment module further includes a plurality of position detection units disposed on the vertical plate of the bottom cover and a control unit connected to the plurality of position detection units; the plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle and transmit the detection results to the control unit so that the control unit controls the drive component based on the detection results.

26. The projection device according to claim 17, characterized in that, The transmission assembly includes a cam, the locking point of which is locked to the drive shaft, and the rotation of the drive shaft drives the rotation of the cam. The linkage support assembly includes an elastic element and a top plate connected to the support rod of the lifting assembly. The elastic element is sleeved on the support rod and its two sides abut against the top plate and the bottom cover, respectively. When the drive body drives the cam to rotate via the drive shaft, the first end of the cam presses against the top plate and compresses the elastic element, or the second end of the cam contacts the top plate and the restoring force of the elastic element pushes the top plate, so that the support rod moves in a direction perpendicular to the bottom cover. The locking point is located between the first end and the second end, and the distance between the first end and the locking point is greater than the distance between the second end and the locking point. The elastic element is used to provide the static support force to the lifting assembly.

27. The projection device according to claim 17, characterized in that, The transmission assembly includes a cam and a protrusion. One end of the cam is locked to the drive shaft, and the protrusion is disposed at the other end of the cam. The rotation of the drive shaft drives the rotation of the cam. The linkage support assembly includes a transmission plate connected to the support rod of the lifting assembly. The transmission plate is provided with a horizontal guide groove, and the protrusion is used to slide in the horizontal guide groove. When the drive body drives the cam to rotate by the drive shaft, the protrusion slides relative to the horizontal guide groove, so that the support rod moves in a direction perpendicular to the bottom cover.

28. The projection device according to claim 16, characterized in that, The linkage support assembly has a baffle on one side; the angle adjustment module further includes a plurality of position detection units disposed on the vertical plate of the bottom cover and a control unit connected to the plurality of position detection units; the plurality of position detection units are located on at least one side of the movement trajectory of the baffle and are used to detect the current position of the baffle, and transmit the detection result to the control unit so that the control unit controls the drive assembly based on the detection result.

29. The projection device according to claim 16, characterized in that, The angle adjustment module further includes an image capturing unit and a control unit. The image capturing unit is connected to the control unit, and the control unit is connected to the driving component. The image capturing unit is used to capture an image corresponding to the projected image of the projection device and transmit the captured image to the control unit, so that the control unit controls the driving component based on the captured image, thereby adjusting the projected image.

Images