A hidden projection screen

Abstract

The application discloses a hidden projection screen, relates to the field of projection equipment, and is installed in a cavity formed in a ceiling, and comprises a box body fixed in the cavity, a screen wheel for winding and unwinding the projection screen is rotatably arranged in the box body, a cover plate is arranged at the bottom of the box body, a servo motor is arranged in the box body, a winding and unwinding mechanism for driving the screen wheel to rotate is arranged in the box body, an opening and closing mechanism for controlling the cover plate is arranged below the winding and unwinding mechanism, a transmission mechanism for simultaneously transmitting power of the servo motor to the opening and closing mechanism and the winding and unwinding mechanism is further arranged in the box body, and a control module wirelessly connected with a mobile phone is arranged on the inner wall of the box body. The application realizes automatic winding and unwinding of the projection screen and automatic opening and closing of the cover plate through remote control of the mobile phone, and the projection screen is prevented from being exposed outside and the effect of not affecting the indoor aesthetic degree is achieved.

Description

Technical Field

[0001] This application relates to the field of projection equipment, and in particular to a hidden projection screen. Background Technology

[0002] In existing technologies, to meet usage needs, users typically fix the projection screen to the ceiling and control its raising and lowering via remote control. This method achieves a certain degree of convenience in using the projection screen, allowing users to lower it for projection at any time as needed and raise it again after use.

[0003] However, a projection screen directly fixed to the ceiling is exposed, which has obvious drawbacks. On the one hand, dust easily accumulates on the surface of the screen, causing the projected image to become blurry and affecting the viewing experience. On the other hand, the installation of a projection screen can affect the overall aesthetics of the room, making the interior environment appear less harmonious and comfortable. Utility Model Content

[0004] To address the issue that directly fixing a projection screen to the ceiling not only causes dust accumulation, affecting its usability, but also detracts from the aesthetics of the room, this application provides a concealed projection screen.

[0005] The concealed projection screen provided in this application adopts the following technical solution: A concealed projection screen is installed in a cavity created in the ceiling. The screen includes a housing fixed within the cavity, with a rotating screen wheel inside the housing for extending and retracting the screen. A cover plate is located at the bottom of the housing. A servo motor is installed inside the housing, along with a retraction mechanism that drives the screen wheel. Below the retraction mechanism is a mechanism for controlling the opening and closing of the cover plate. A transmission mechanism is also installed inside the housing to simultaneously transmit power from the servo motor to both the opening / closing mechanism and the retraction mechanism. A control module wirelessly connected to a mobile phone is installed on the inner wall of the housing, and the control module is electrically connected to the servo motor.

[0006] By adopting the above technical solution, the servo motor provides power to both the opening / closing mechanism and the retraction / extension mechanism through the transmission mechanism, realizing the linkage between the opening / closing of the cover and the retraction / extension of the projection screen, making operation more convenient and efficient. This not only reduces dust accumulation on the projection screen surface but also enhances the aesthetics of the room.

[0007] Optionally, the take-up and take-down mechanism includes a worm gear fixed to the output end of a servo motor and a worm wheel coaxially fixed to a curtain wheel. The other end of the worm gear rotates on the inner wall of the box, and the worm wheel meshes with the worm gear.

[0008] By adopting the above technical solution, the output end of the servo motor drives the worm gear to rotate, and the worm gear meshes with the worm wheel to rotate the screen wheel, thereby realizing the raising and lowering of the projection screen. The worm gear structure stably transmits power, making it easy to control the raising and lowering operation of the projection screen.

[0009] Optionally, the opening and closing mechanism includes a rotating shaft rotating on the inner wall of the box, a connecting rod coaxially fixed on the rotating shaft, a guide rail fixed on the cover plate, and a hinge set at the bottom of the box. One end of the connecting rod is hinged to the cover plate, one end of the hinge is fixed to the inner wall of the box, and the other end of the hinge has a through hole. The outer wall of the box where the hinge is located forms a cavity with the chamber. The rotation of the connecting rod drives the cover plate and the guide rail to flip towards the cavity and causes the guide rail to slide in the through hole, finally flipping the cover plate into the cavity with the cover plate parallel to the height direction of the box.

[0010] By adopting the above technical solution, the servo motor drives the rotating shaft and connecting rod to rotate through the transmission mechanism, which in turn causes the cover plate and guide rail to flip towards the cavity formed by the outer wall of the hinge housing and the chamber, thus realizing the opening and closing action of the cover plate. When the projection screen is not in use, it can be stored in the housing, and the closed cover plate can prevent dust accumulation on the projection screen. When the projection screen is in use, the cover plate is opened to facilitate the deployment of the projection screen.

[0011] Optionally, the transmission assembly includes a driving wheel fixed on the worm and a driven wheel fixed on the rotating shaft, wherein the driving wheel and the driven wheel are connected by a belt.

[0012] By adopting the above technical solution, the servo motor drives the drive wheel to rotate synchronously, and under the action of the belt, the drive wheel drives the driven wheel to rotate. The transmission mechanism simultaneously drives the opening and closing mechanism and the retraction mechanism, realizing the linkage between the opening and closing of the cover and the retraction of the projection screen.

[0013] Optionally, two limiting plates are fixed to the top of the box body, and the screen wheel passes through the two limiting plates. The two limiting plates are used to limit the extension and retraction area of ​​the projection screen. The opposite sides of the two limiting plates and the interior of the box body both form installation areas, and the extension and retraction mechanism is located in one of the installation areas.

[0014] By adopting the above technical solution, the two limiting plates can restrict the projection screen's retraction and extension area, ensuring that the projection screen is retracted and extended neatly and orderly, and preventing deviation or chaos during retraction and extension. Installing the retraction and extension mechanism within one of the installation areas prevents the operation of the mechanism from interfering with the retraction and extension of the projection screen.

[0015] Optionally, one end of the projection screen is fixed to the outer wall of the screen wheel, and the other end of the projection screen is fixed with a load-bearing rod, which extends along the length of the projection screen and is used to straighten the projection screen.

[0016] By adopting the above technical solution, the load-bearing rod is used to straighten the projection screen, preventing wrinkles from appearing during use and ensuring a flat and clear projected image.

[0017] Optionally, a connecting plate is provided between the screen wheel and the cover plate. The connecting plate is fixed to the inner wall of the box and has a guide square hole that is adapted to the movement path of the projection screen.

[0018] By adopting the above technical solution, the connecting plate and its guide square holes can be adapted to the movement path of the projection screen, providing guidance for the opening and closing of the projection screen, making the projection screen more stable and smooth during the opening and closing process.

[0019] Optionally, the control module includes a controller and a wireless communication module, wherein the controller is electrically connected to the servo motor and the wireless communication module respectively.

[0020] By adopting the above technical solution, the wireless communication module included in the control module can be wirelessly connected to a mobile phone. Combined with the controller, it can control the servo motor, allowing users to remotely control the hidden projection screen via their mobile phones, thus improving the convenience of use.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. When using the projection screen, the cover is opened via the opening and closing mechanism, and the projection screen is lowered via the retraction mechanism. When not in use, the cover is closed, and the projection screen is retracted. This prevents the projection screen from being exposed, reduces dust accumulation, and ensures a clear projected image; 2. By hiding the projection screen inside the cavity, the overall aesthetics of the room are not affected, making the indoor environment more harmonious and comfortable; 3. The transmission mechanism can simultaneously transmit the power of the servo motor to the opening and closing mechanism and the take-up and release mechanism, realizing the linkage between the take-up and release mechanism and the opening and closing mechanism, improving the power utilization rate and reducing the operating cost. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the installation of the concealed projection screen and the ceiling provided in the embodiments of this application; Figure 2 This is a cross-sectional view of the box body provided in the embodiment of this application, used to show the internal structure; Figure 3This is a schematic diagram of the structure of the curtain wheel, limiting plate and connecting plate provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the take-up and release mechanism and the transmission mechanism provided in the embodiments of this application; Figure 5 This is a partial structural diagram of the interior of the box after the cover is fully opened, as provided in the embodiment of this application. Figure 6 This is a schematic diagram of the opening and closing mechanism of the cover door after it is fully opened, as provided in the embodiments of this application.

[0024] Reference numerals in the attached drawings: 1. Box body; 2. Curtain wheel; 3. Cover plate; 4. Servo motor; 5. Retraction mechanism; 51. Worm gear; 52. Worm wheel; 6. Opening and closing mechanism; 61. Rotating shaft; 62. Connecting rod; 63. Guide rail; 64. Hinge; 65. Through hole; 7. Transmission mechanism; 71. Driving wheel; 72. Driven wheel; 73. Belt; 8. Control module; 9. Limiting plate; 10. Load-bearing rod; 11. Connecting plate; 12. Guide square hole. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] This application discloses a hidden projection screen.

[0027] First, a cavity needs to be created in the ceiling for installing a hidden projection screen.

[0028] Reference Figure 1 and Figure 2 A concealed projection screen includes a housing 1, a screen roller 2, and a cover plate 3. The housing 1 has an opening at the bottom, and the cover plate 3 is sized to match the housing 1. The cover plate 3 is slidably positioned below the housing 1 to form a relatively enclosed space. The screen roller 2 rotates on the inner wall of the housing 1 to extend and retract the projection screen. A control module 8, which wirelessly connects to a mobile phone, is located on the inner wall of the housing 1.

[0029] Reference Figure 2 A servo motor 4 is installed inside the housing 1, and its end is fixed to the inner wall of the housing 1 by bolts. A retraction mechanism 5 is installed on the inner wall of the housing 1 to drive the screen wheel 2 to rotate, and to release and retract the projection screen by changing the rotation direction of the screen wheel 2. An opening and closing mechanism 6 is located below the retraction mechanism 5 to open the cover 3 when the projection screen is released and close the cover 3 when the projection screen is retracted. A transmission mechanism 7 is also installed inside the housing 1 to transmit the power drive of the servo motor 4 to the retraction mechanism 5 and the opening and closing mechanism 6 respectively.

[0030] Furthermore, the transmission mechanism 7 requires only one power source to operate the retraction mechanism 5 and the opening and closing mechanism 6, improving power utilization and reducing operating costs. The coordinated operation of these components enables the projection screen to be retracted and extended discreetly, preventing dust accumulation and enhancing the aesthetics of the room.

[0031] The control module 8 includes a controller and a wireless communication module. The controller is electrically connected to both the servo motor 4 and the wireless communication module. The controller can start the servo motor 4 based on received signals. The wireless communication module can be a Bluetooth module, a Wi-Fi module, etc. By wirelessly connecting to a mobile phone, the user can send commands to control the projection screen's retraction and the opening and closing of the cover plate 3. This application achieves concealed retraction of the projection screen, preventing it from accumulating dust and improving the aesthetics of the room.

[0032] Reference Figure 2 and Figure 3 Two limiting plates 9 are installed inside the housing 1. Both limiting plates 9 pass through the screen roller 2 and are fixed to the top of the inner wall of the housing 1. The distance between the two limiting plates 9 is not less than the width of the projection screen. Their function is to limit the extension and retraction area of ​​the projection screen and prevent the projection screen from shifting during extension and retraction. In addition, the opposite sides of the two limiting plates 9 form installation areas with the interior of the housing 1, and the extension and retraction mechanism 5 is located in one of the installation areas. The limiting plates 9 isolate the projection screen from the extension and retraction mechanism 5, thereby preventing the operation of the components of the extension and retraction mechanism 5 from interfering with the projection screen and causing damage to the projection screen.

[0033] Reference Figure 3 One end of the projection screen is fixed to the outer wall of the screen roller 2, and the other end is fixed to a load-bearing rod 10. The load-bearing rod 10 is set along the length of the projection screen, and its function is to straighten the projection screen, so that the projection screen remains flat when unfolded, thereby improving the quality of the projected image. A connecting plate 11 is set between the screen roller 2 and the cover plate 3. The connecting plate 11 is fixed to the inner wall of the housing 1, and a guide square hole 12 is opened on the connecting plate 11. The guide square hole 12 is adapted to the movement path of the projection screen. The function of the guide square hole 12 is to provide guidance for the unfolding and retraction of the projection screen, so that the projection screen can accurately pass through the opening position of the cover plate 3. In addition, the width of the connecting plate 11 is smaller than the width of the inner wall of the housing 1, and the connecting plate 11 does not affect the operation of the transmission mechanism 7.

[0034] Reference Figure 2 and Figure 4The take-up and take-down mechanism 5 includes a worm gear 51 and a worm wheel 52. One end of the worm gear 51 is fixed to the output end of the servo motor 4, while the other end rotates on the inner wall of the housing 1. This arrangement allows the worm gear 51 to stably transmit power from the servo motor 4. The worm wheel 52 is coaxially fixed to the curtain wheel 2, and the worm gear 51 and the worm wheel 52 mesh with each other. The worm gear 51 is made of high-strength metal to ensure that it is not easily worn during long-term use and to ensure the stability of transmission. The worm wheel 52 is made of copper alloy, which has good wear resistance and self-lubricating properties, reducing frictional losses during transmission.

[0035] When the servo motor 4 drives the worm gear 51 to rotate, due to the meshing transmission relationship between the worm gear 51 and the worm wheel 52, the worm wheel 52 will rotate accordingly, thereby driving the screen wheel 2 to rotate to realize the extension and retraction of the projection screen.

[0036] Reference Figure 5 and Figure 6 The opening and closing mechanism 6 includes a rotating shaft 61, a connecting rod 62, a guide rail 63, and a hinge 64. The rotating shaft 61 rotates on the inner wall of the box body 1. One end of the connecting rod 62 is coaxially fixed to the rotating shaft 61, and the other end is hinged to the cover plate 3. The hinge 64 is located on the top of the box body 1. One end of the hinge 64 is fixed to the inner wall of the box body 1, and the other end of the hinge 64 has a through hole 65. The outer wall of the box body 1 where the hinge 64 is located forms a cavity with the chamber. The guide rail 63 is fixed to the cover plate 3 and passes through the through hole 65 of the hinge 64. The through hole 65 provides guidance for the flipping of the cover plate 3, thus ensuring the stability and accuracy of the flipping of the cover plate 3.

[0037] Reference Figure 5 and Figure 6 The transmission mechanism 7 includes a drive wheel 71, a driven wheel 72, and a belt 73. The drive wheel 71 is coaxially fixed to the worm gear 51, and the driven wheel 72 is coaxially fixed to the rotating shaft 61. The belt 73 connects the two. The drive wheel 71 rotates with the worm gear 51, transmitting power to the driven wheel 72 via the belt 73. The driven wheel 72 drives the rotating shaft 61 to rotate, thus transmitting the power of the servo motor 4 from the retraction mechanism 5 to the opening and closing mechanism 6. With the cooperation of all components in this application, the release or retraction of the projection screen and the opening or closing of the cover plate 3 occur simultaneously and without interference.

[0038] Reference Figure 4 , Figure 5 and Figure 6When the projection screen is needed, the hidden projection screen is released via remote control using a mobile phone. The control module 8 starts the servo motor 4 to rotate counterclockwise. On one hand, the worm gear 51 drives the worm wheel 52 to rotate the screen wheel 2, releasing the projection screen. On the other hand, under the action of the transmission mechanism 7, the rotating shaft 61 and the connecting rod 62 rotate counterclockwise synchronously, thereby causing the cover plate 3 and the guide rail 63 to flip towards the cavity. At the same time, the guide rail 63 slides in the through hole 65 of the hinge 64, flipping the cover plate 3 into the cavity to fully open the cover plate 3. The controller controls the number of rotations of the servo motor 4 so that when the projection screen is released to the preset position, the controller controls the servo motor 4 to automatically stop rotating. At this time, the cover plate 3 is located inside the cavity and parallel to the height direction of the box 1. The user can then use the projection device normally to project the image onto the projection screen for viewing. At the same time, even if the projection screen has not been released to the preset length, the user can also operate the control module 8 via mobile phone to make the controller stop the servo motor 4 and release the projection screen to the desired height.

[0039] When the projection screen needs to be retracted, it is retracted again via remote control using a mobile phone. The wireless communication module receives the signal from the mobile phone, and the controller controls the servo motor 4 to rotate clockwise based on the signal from the wireless communication module. On one hand, the worm gear 51 drives the worm wheel 52 to rotate the screen wheel 2, and the projection screen is retracted. On the other hand, under the action of the transmission mechanism 7, the rotating shaft 61 and the connecting rod 62 rotate clockwise synchronously, thereby causing the cover plate 3 and the guide rail 63 to flip towards the bottom of the housing 1; at the same time, the guide rail 63 slides in the through hole 65 of the hinge 64, flipping the cover plate 3 to the bottom of the housing 1. The cover plate 3 and the housing 1 form a relatively sealed space, hiding the screen and protecting it from dust and damage.

[0040] The implementation principle of a hidden projection screen according to this application embodiment is as follows: The user sends a command to the control module 8 via a mobile phone. After receiving the command, the control module 8 controls the servo motor 4 to start. The power of the servo motor 4 drives the screen wheel 2 to rotate through the retraction mechanism 5, thereby retracting and extending the projection screen. At the same time, the power is transmitted to the opening and closing mechanism 6 through the transmission mechanism 7 to control the opening and closing of the cover plate 3. When the projection screen is needed, the cover plate 3 opens and the projection screen is lowered; after use, the projection screen is retracted, the cover plate 3 closes, and the projection screen is hidden inside the housing 1. This hidden design avoids the projection screen being exposed to the outside and accumulating dust, while also improving the aesthetics of the room.

[0041] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concealed projection screen, wherein the concealed projection screen is installed in a cavity opened in the ceiling, characterized in that: The device includes a housing (1) fixed inside the cavity, a screen wheel (2) for retracting and extending the projection screen is rotatable inside the housing (1), a cover plate (3) is provided at the bottom of the housing (1), a servo motor (4) is provided inside the housing (1), a retraction mechanism (5) for driving the screen wheel (2) to rotate is provided inside the housing (1), an opening and closing mechanism (6) for controlling the cover plate (3) is provided below the retraction mechanism (5), a transmission mechanism (7) for simultaneously transmitting power from the servo motor (4) to the opening and closing mechanism (6) and the retraction mechanism (5) is also provided inside the housing (1), and a control module (8) for wireless connection with a mobile phone is provided on the inner wall of the housing (1), and the control module (8) is electrically connected to the servo motor (4).

2. The hidden projection screen according to claim 1, characterized in that: The take-up and take-down mechanism (5) includes a worm (51) fixed on the output end of the servo motor (4) and a worm wheel (52) coaxially fixed on the curtain wheel (2). The other end of the worm (51) rotates on the inner wall of the box (1), and the worm wheel (52) meshes with the worm (51).

3. A hidden projection screen according to claim 1, characterized in that: The opening and closing mechanism (6) includes a rotating shaft (61) rotating on the inner wall of the box body (1), a connecting rod (62) coaxially fixed on the rotating shaft (61), a guide rail (63) fixed on the cover plate (3), and a hinge (64) set at the bottom of the box body (1). One end of the connecting rod (62) is hinged to the cover plate (3), and one end of the hinge (64) is fixed to the inner wall of the box body (1). The other end of the hinge (64) is provided with a through hole (65). The outer wall of the box body (1) where the hinge (64) is located forms a cavity with the chamber. The rotation of the connecting rod (62) causes the cover plate (3) and the guide rail (63) to flip towards the cavity and make the guide rail (63) slide in the through hole (65), and finally flip the cover plate (3) into the cavity and the cover plate (3) is parallel to the height direction of the box body (1).

4. A hidden projection screen according to claim 1, characterized in that: The transmission mechanism includes a drive wheel (71) fixed on a worm (51) and a driven wheel (72) fixed on a rotating shaft (61). The drive wheel (71) and the driven wheel (72) are connected by a belt (73).

5. A hidden projection screen according to claim 1, characterized in that: The top of the box (1) is fixed with two limiting plates (9), and the screen wheel (2) passes through the two limiting plates (9). The two limiting plates (9) are used to limit the extension and retraction area of ​​the projection screen. The opposite sides of the two limiting plates (9) and the inside of the box (1) form an installation area. The extension and retraction mechanism (5) is located in one of the installation areas.

6. A hidden projection screen according to claim 1, characterized in that: One end of the projection screen is fixed to the outer wall of the screen wheel (2), and the other end of the projection screen is fixed with a load-bearing rod (10). The load-bearing rod (10) extends along the length of the projection screen and is used to straighten the projection screen.

7. A hidden projection screen according to claim 1, characterized in that: A connecting plate (11) is provided between the screen wheel (2) and the cover plate (3). The connecting plate (11) is fixed to the inner wall of the box body (1). The connecting plate (11) has a guide square hole (12) that is adapted to the movement path of the projection screen.

8. A hidden projection screen according to claim 1, characterized in that: The control module (8) includes a controller and a wireless communication module, wherein the controller is electrically connected to the servo motor (4) and the wireless communication module respectively.

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