Projection device and intelligent bed

Abstract

The embodiment of the utility model provides a projection device, an intelligent bed and a curtain control method. The projection device comprises a curtain assembly, a first driving structure located on one of the left side and the right side of the curtain assembly, a second driving structure located on the other side, and guide structures located at the upper end and the lower end of the curtain assembly. Wherein the guide structure is in an arc shape bent towards one side deviating from the projector, the first driving structure can drive the curtain assembly to be unfolded along the guide structure, so that the curtain is in a curved surface state in an unfolded state, and compared with a curtain in a plane state, the viewing angle of a user is larger when the user watches a film, so that the good film watching experience feeling of the user is ensured. The second driving structure can drive the curtain assembly to be folded along the guiding structure and accommodate the curtain assembly, so that when a user does not watch a film, the curtain assembly does not shield light and does not bring a depressed feeling to the user.

Description

Technical Field

[0001] The present application relates to the technical field of smart home devices, and in particular to projection devices and smart beds. Background Art

[0002] Currently, smart beds with video functions on the market typically feature an electronic viewing screen or a screen-and-projector combination at the end of the bed. While these setups can meet users' viewing and entertainment needs, the electronic screen is unsightly and easily damaged. While the screen-and-projector combination allows for a retractable screen, the flat screen has a narrow viewing angle, and the image's color and contrast are poor, preventing users from having a truly immersive viewing experience. Summary of the Invention

[0003] In view of the above problems, the embodiments of the present application are proposed. The purpose of the embodiments of the present application is to provide a retractable curved projection device.

[0004] To achieve this goal, the present invention adopts the following technical solutions:

[0005] A projection device comprises: a screen assembly, a first driving structure located on one of the left and right sides of the screen assembly, a second driving structure located on the other side, and guide structures located at the upper and lower ends of the screen assembly; wherein

[0006] The first driving structure is capable of driving the curtain assembly to unfold along the guide structure;

[0007] The second driving structure is capable of driving the curtain assembly to be retracted along the guide structure and accommodate the curtain assembly;

[0008] The guide structure is in an arc shape that bends toward a side away from the projector.

[0009] Optionally, the curtain assembly includes:

[0010] The upper and lower ends of the curtain are slidably arranged in the guide structure, and one of the left and right sides of the curtain is arranged on the second driving structure;

[0011] A counterweight rod is located on the other side of the curtain, and the upper and lower ends of the counterweight rod are located in the guide structure, abut against the guide structure, and can slide along the guide structure. The first driving structure is connected to the upper and lower ends of the counterweight rod to unfold the curtain.

[0012] Optionally, the guide structure includes:

[0013] Two guide rails, one at each of the upper and lower ends of the curtain, each having an accommodation space therein, and an accommodation slot provided on the side of the guide rail facing the curtain, so that the upper edge or the lower edge of the curtain can pass through the accommodation slot and be slidably accommodated in the accommodation space;

[0014] A first limiting structure is provided on a space wall in the accommodating space that is away from the accommodating gap and faces the accommodating gap. A second limiting structure is provided on the end of the counterweight rod. The second limiting structure matches the first limiting structure to limit the upper and lower edges of the curtain within the accommodating space and guide the path of unfolding and retracting the curtain assembly.

[0015] Optionally, the guide rail is in an arc shape that bends toward a side away from the projector;

[0016] The curvature of the arc is 4000R; or

[0017] The curvature of the arc is the curvature of the image projected by the projector.

[0018] Optionally, the first limiting structure includes:

[0019] A slide and a connecting plate located in the center of the slide and connecting the slide to the space wall;

[0020] The side of the slide away from the connecting plate has a guide rail groove;

[0021] The second limiting structure includes:

[0022] a bracket, buckled on a side of the first limiting structure facing away from the space wall; and

[0023] Two pulleys are rotatably arranged on the bracket, with one pulley on each side of the connecting plate, and the pulleys are in contact with a side of the slide away from the guide rail groove.

[0024] Optionally, the curtain is located between the second limiting structures at both ends of the counterweight rod;

[0025] The upper and lower edges of the curtain are accommodated between the accommodating seams and the guide rail grooves on the corresponding sides.

[0026] Optionally, the distance between the accommodating gap and the bottom wall of the guide rail groove is greater than or equal to 5 cm and less than or equal to 8 cm.

[0027] Optionally, the width of the accommodating gap is smaller than the width of the guide rail and larger than the thickness of the curtain.

[0028] Optionally, the difference between the width of the accommodating gap and the thickness of the curtain is greater than or equal to 2 mm and less than or equal to 4 mm.

[0029] Optionally, the slit walls on both sides of the accommodating slit are provided with limiting plates facing the accommodating space, and the friction coefficients of the opposite sides of the two limiting plates are smaller than the friction coefficients at other positions of the guide rail.

[0030] Optionally, the curtain is a soft curtain made of hard material.

[0031] Optionally, the first driving structure includes:

[0032] The winding shaft is rotatably arranged, and the upper and lower ends of the winding shaft are both provided with wire accommodating grooves;

[0033] Two guide wires, corresponding one to the wire accommodating grooves, one end of each guide wire being wound and disposed in the wire accommodating groove, and the other end being connected to the upper end or the lower end of the curtain assembly away from the first driving structure, the guide wire being located in the guide structure; and

[0034] The winding power part has an output end connected to the top end or the bottom end of the winding shaft.

[0035] Optionally, the first driving structure includes:

[0036] The winding shaft is rotatably arranged, and the upper and lower ends of the winding shaft are both provided with wire accommodating grooves;

[0037] a guide wire, wound in the wire accommodating groove, one end of the guide wire being connected to the groove wall of the wire accommodating groove, and the other end being connected to the upper end or the lower end of the corresponding counterweight rod, the guide wire being located in the guide structure; and

[0038] The winding power part has an output end connected to the top end or the bottom end of the winding shaft. When the winding power part is in a non-working state, the output end rotates passively.

[0039] Optionally, the second driving structure includes:

[0040] A reeling shaft is rotatably arranged, and an end of the curtain away from the counterweight rod is arranged on the reeling shaft;

[0041] The retracting power member has a transmission end connected to the top end or the bottom end of the retracting shaft. When the retracting power member is in a non-working state, the transmission end rotates passively.

[0042] Optionally, the projection device further includes a first accommodating column and a second accommodating column respectively located on the left and right sides of the guide structure;

[0043] The first driving structure is located in the first accommodating column, and the second driving structure is located in the second accommodating column. The first accommodating column has an extension groove on the side facing the second accommodating column, and the extension groove allows the curtain to extend from the side of the counterweight rod. The left and right ends of the guide structure extend into the first accommodating column or the second accommodating column on the corresponding side.

[0044] Optionally, the width of the extending slot is greater than the thickness of the curtain but smaller than the thickness of the counterweight rod.

[0045] Optionally, the projection device further includes:

[0046] A limit switch, wherein both the first accommodating column and the second accommodating column are provided with a limit switch;

[0047] When the curtain is in the reeling state, the counterweight rod contacts the limit switch on the first receiving column, the second driving structure stops, and the reeling is completed;

[0048] When the curtain is in the unfolding state, the counterweight rod abuts against the limit switch on the second receiving column, the first driving structure stops, and the unfolding is completed.

[0049] Another purpose of the embodiment of the present application is to provide a smart bed with a good viewing experience and a curved and retractable screen.

[0050] To achieve this goal, the present invention adopts the following technical solutions:

[0051] A smart bed, comprising:

[0052] A bed and a projection device located at the end of the bed;

[0053] The projection device is any one of the projection devices described above.

[0054] The technical solution provided by the embodiments of the present application comprises a first drive structure and a second drive structure, respectively, disposed on the left and right sides of the screen assembly. The first drive structure drives the screen assembly to unfold along a guide structure, while the second drive structure drives the screen assembly to retract and store the screen along the guide structure. When the screen needs to be unfolded, the first drive structure operates to pull the screen from a retracted state, where it is wrapped around the second drive structure, to an unfolded state. Because the guide structure is curved away from the projector, the screen forms a curved surface when unfolded, ensuring a better viewing angle for the user and providing a more immersive viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0056] Figure 1 A schematic structural diagram of a projection device provided in one embodiment of the present application;

[0057] Figure 2 An exploded view of a projection device provided in one embodiment of the present application;

[0058] Figure 3 A schematic diagram of the structure of the first limiting structure and the second limiting structure provided in an embodiment of the present application;

[0059] Figure 4 A schematic structural diagram of a first accommodating column provided in one embodiment of the present application.

[0060] In the picture:

[0061] 1. Curtain assembly; 11. Curtain; 12. Counterweight rod; 121. Rod body; 122. Second limiting structure; 1220. Bracket; 1221. Pulley;

[0062] 2. Guide structure; 21. Guide rail; 210. Accommodation space; 211. Accommodation gap; 212. First limiting structure; 2120. Slide; 2121. Connecting plate; 2122. Guide rail groove; 213. Limiting plate;

[0063] 3. First driving structure; 31. Winding shaft; 32. Guide wire; 33. Winding power member;

[0064] 4. Second driving structure; 41. Rewinding shaft; 42. Rewinding power member;

[0065] 5. First accommodating column; 51. Extension slot;

[0066] 6. Second accommodating column;

[0067] 7. Limit switch. DETAILED DESCRIPTION

[0068] The inventors of this application have conducted a detailed study of existing smart beds with viewing functions and found that in general, the projection device on the smart bed is either fixed at the end of the bed, which is not conducive to lighting and gives the user a sense of oppression, or it is a flat structure that rolls up in the vertical direction. However, the flat screen has a small viewing angle and cannot provide users with a good immersive viewing experience.

[0069] Based on this, the inventors of this application tried to design a device that can be folded up when the user is not watching a movie without blocking the light and causing a sense of oppression to the user, while also ensuring a wide viewing angle for the user when watching a movie, thereby achieving a good viewing experience, resulting in the following embodiments.

[0070] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present application and are not intended to limit the present application. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions of the present application, not all of the structures.

[0071] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0072] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0073] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0074] Please refer to Figure 1The present invention provides a smart bed comprising a bed frame. A sleep-inducing aromatherapy component may be provided at the headboard of the bed frame to aid the user's sleep while lying on the bed. A lighting lamp and a reading lamp may be provided above the bed frame, and the appropriate lamp may be selected based on the user's lighting and reading needs. A massage device may be provided on the bed frame at the user's reclining position to provide a relaxing massage while the user lies on the bed.

[0075] In some embodiments of the present application, the smart bed also includes a projection device located at the end of the bed. The projection device is unfolded when the user needs to watch a movie, and is stored in the bed when the user does not need to watch a movie to ensure lighting for the entire smart bed and will not cause a sense of oppression to the user.

[0076] The projector used for projection can be an external device installed on the top of the bed or placed on the bedside table, or it can be a projector that comes with the smart bed that is integrated with the bed. This application does not make specific restrictions.

[0077] In order to ensure that users have a good viewing angle and obtain an immersive viewing experience, in some embodiments of this application, please refer to Figures 1 and 2 One possible structure of the projection device includes a screen assembly 1, a first driving structure 3 located on one of the left and right sides of the screen assembly 1, a second driving structure 4 located on the other side, and a guide structure 2 located at the upper and lower ends of the screen assembly 1. The guide structure 2 is an arc that bends toward the side away from the projector. The first driving structure 3 can drive the screen assembly 1 to unfold along the guide structure 2, so that the unfolded screen 11 is a curved surface. When the projected image is projected onto the curved screen 11, the image will be more three-dimensional, and the depth of field will be enhanced, making the structure in the image more layered and giving the user a stronger sense of immersion. The second driving structure 4 can drive the screen assembly 1 to retract and store the screen assembly 1 along the guide structure 2, so that the user can store the screen assembly 1 when not watching a movie, to avoid the screen assembly 1 blocking the light and causing the user to feel depressed.

[0078] Alternatively, the first drive mechanism 3 may be located on the left side of the curtain assembly 1 and the second drive mechanism 4 may be located on the right side of the curtain assembly 1. In this case, the curtain assembly 1 unfolds from right to left and rolls up from left to right when it is unfolded. Alternatively, the first drive mechanism 3 may be located on the right side of the curtain assembly 1 and the second drive mechanism 4 may be located on the left side of the curtain assembly 1. In this case, the curtain assembly 1 unfolds from left to right and rolls up from right to left when it is rolled up. As long as the unfolding and rolling up of the curtain assembly 1 can be achieved, this embodiment is not particularly limited.

[0079] It is understandable that in order to meet the lighting needs of the user, there will be a mounting top in the center above the reclining position for the lighting fixture. To ensure the stability of the mounting top, there are support columns between the four corners of the mounting top and the four corners of the bed. The first drive structure 3 and the second drive structure 4 can be respectively set in the support columns at the end of the bed to make full use of the structure of the smart bed. Of course, please refer to Figures 1 and 2 In other embodiments, the projection device may further include a first accommodating column 5 and a second accommodating column 6, respectively located on the left and right sides of the guide structure 2. The first drive structure 3 is located within the first accommodating column 5, and the second drive structure 4 is located within the second accommodating column 6, so that the projection device comprises a single, integrated projection module. The first and second accommodating columns 5 and 6 are removably located on either side of the foot of the bed, allowing the projection module to be installed on conventional smart beds or standard beds that lack lighting or a frame above the reclining position, thus expanding the application range of the projection device.

[0080] For further information, please refer to Figure 4 The first receiving column 5 has a projection slot 51 on the side facing the second receiving column 6. The projection slot 51 allows the curtain 11 to extend from the side of the counterweight rod 12, thereby ensuring that it does not interfere with the retraction or deployment of the curtain 11. In some embodiments of the present application, the width of the projection slot 51 is greater than the thickness of the curtain 11 but less than the thickness of the counterweight rod 12. Therefore, when the curtain 11 is in the retracted state, the counterweight rod 12 is constrained at the notch of the projection slot 51, preventing it from disengaging from the guide structure 2, thereby ensuring smooth deployment or retraction of the curtain 11.

[0081] In some embodiments of this application, please refer to Figures 1 to 3 As shown, one possible structure of the curtain assembly 1 is to include a curtain 11 and a counterweight rod 12. The upper and lower ends of the curtain 11 are slidably disposed within the guide structure 2, and one of the left and right sides of the curtain 11 is disposed on the second drive structure 4. The counterweight rod 12 is located on the other side of the curtain 11. The upper and lower ends of the counterweight rod 12 are located within the guide structure 2, abutting against the guide structure 2 and capable of sliding along the guide structure 2. The first drive structure 3 is connected to the upper and lower ends of the counterweight rod 12 to unfold the curtain 11. The ends of the counterweight rod 12 are limited in a position to guide the edge of the curtain assembly 1 to move along the guide structure 2, thereby preventing the edge of the curtain assembly 1 from being too soft and derailing during movement along the guide structure 2.

[0082] Further, in some embodiments of this application, please refer to Figures 1 to 3As shown, the guide structure 2 includes two guide rails 21, one at each of the upper and lower ends of the curtain 11. The guide rails 21 define a receiving space 210. A receiving slot 211 is provided on the side of the guide rails 21 facing the curtain 11. The upper or lower edge of the curtain 11 passes through the receiving slot 211 and can be slidably received within the receiving space 210. The slot walls on either side of the slot 211 restrict the curtain 11 from sliding along the guide rails 21, preventing it from disengaging from the rails. After deployment, the curtain 11 assumes a predetermined shape within the constraints of the guide rails 21. A first limiting structure 212 is provided on the wall of the receiving space 210 facing away from the slot 211. A second limiting structure 122 is provided at the end of the counterweight rod 12. The second limiting structure 122 mates with the first limiting structure 212 to constrain the upper and lower edges of the curtain 11 within the receiving space 210 and guide the deployment and retraction path of the curtain assembly 1. The cooperation between the first limiting structure 212 and the second limiting structure 122 prevents the two ends of the counterweight rod 12 from being separated from the guide rail 21, thereby ensuring that the upper and lower edges of the curtain 11 will not be separated from the guide rail 21, and ensuring that the curtain 11 can be unfolded into an arc surface along the shape of the guide rail 21.

[0083] The guide rail 21 is curved toward the side away from the projector, so that after the screen 11 is unfolded along the guide rail 21, the upper and lower ends of the screen 11 become the guide structures 2 for the screen 11 to unfold into an arc surface. Then the curvature of the guide rail 21 affects the arc shape of the screen 11 after unfolding. In some embodiments of the present application, please refer to Figures 1 to 3 As shown, the curvature of the guide rail 21 is 4000r, so that the curved surface of the unfolded screen 11 has the same curvature as the lens of the eye. This ensures that every point on the screen 11 is the same distance from the eye, giving the projected image a wider range of image extension, ensuring user comfort and a good viewing experience. Alternatively, the curvature of the guide rail 21 is the curvature of the projector's image, so that the curvature of the unfolded screen 11 and the curvature of the projected image are consistent, so that the light irradiated by the projector on each area of the screen 11 is perpendicular to the screen 11, achieving an optimal display image and providing users with a better viewing experience.

[0084] In some embodiments of this application, please refer to Figures 1 to 3As shown, the first limiting structure 212 includes a slide 2120 and a connecting plate 2121 located in the center of the slide 2120, connecting the slide 2120 to the space wall. The side of the slide 2120 facing away from the connecting plate 2121 has a guide rail groove 2122. The second limiting structure 122 includes a bracket 1220 and two pulleys 1221. The bracket 1220 is buckled onto the side of the first limiting structure 212 facing away from the space wall. There is a pulley 1221 on each side of the connecting plate 2121. The pulleys 1221 are rotatably mounted on the bracket 1220 and abut against the side of the slide 2120 facing away from the guide rail groove 2122. This reduces the friction of the counterweight rod 12 when it slides along the guide rail 21, ensuring smooth sliding of the counterweight rod 12 along the guide rail 21. At the same time, the connecting plates 2121 can limit the positions of the pulleys 1221 on both sides so that the pulleys 1221 will not deviate from the matching tracks, thereby ensuring that the limit rods will not derail and that the curtain 11 can be smoothly unfolded along the guide rails 21 .

[0085] In order to prevent the upper and lower edges of the curtain 11 from being blocked by the slide 2120, in some embodiments of the present application, please refer to Figures 1 to 3 As shown, the curtain 11 is positioned between the second retaining structures 122 at the ends of the counterweight rod 12, with the upper and lower edges of the curtain 11 contained between the corresponding accommodation gaps 211 and the guide rail grooves 2122. In other words, the upper and lower ends of the counterweight rod 12 protrude beyond the upper and lower edges of the curtain 11, and the second retaining structures 122 mate with the first retaining structures 212, precisely positioning the edges of the curtain 11 within the guide rail grooves 2122. The left and right sidewalls of the guide rail grooves 2122 also constrain the upper and lower edges of the curtain 11, preventing them from slipping out.

[0086] Further, in some embodiments of this application, please refer to Figures 1 to 3 As shown, the distance between the accommodating gap 211 and the bottom wall of the guide rail groove 2122 is greater than or equal to 5 cm and less than or equal to 8 cm. Therefore, the minimum distance between the upper and lower edges of the screen 11 accommodated in the accommodating space 210 can be 5 cm. This can avoid the risk of being dragged out of the guide rail 21 by other parts of the screen 11 due to the short length located in the guide rail 21, and further prevent the upper and lower edges of the screen 11 from slipping off the guide rail 21. The length of the screen 11 located in the accommodating space 210 can be any one of 5 cm, 6 cm, 7 cm, and 8 cm, as long as it is greater than or equal to 5 cm. This application does not impose any specific limitation.

[0087] It is understandable that if the width of the accommodating gap 211 is too wide, it will not effectively limit the upper and lower edges of the curtain 11, which may also lead to the risk of the upper and lower edges of the curtain 11 detaching from the guide rail 21. Therefore, in some embodiments of the present application, the width of the accommodating gap 211 is smaller than the width of the guide rail 21 and larger than the thickness of the curtain 11, so as to both play a limiting role and ensure that the upper and lower edges of the curtain 11 can pass through smoothly.

[0088] It is understandable that the curtain 11 will sway in the left and right directions during the unfolding process. If the width of the accommodating slot 211 is too small, the curtain 11 will easily fit with the slot walls on both sides of the accommodating slot 211 and generate friction, thereby generating resistance during unfolding or retraction. Therefore, in some embodiments of the present application, please refer to Figures 1 to 3 As shown, the width of the accommodating seam 211 is at least 2 mm and at most 4 mm greater than the thickness of the curtain 11 , thereby not only not hindering the passage of the upper and lower edges of the curtain 11 , but also preventing excessive friction with the seam wall of the accommodating seam 211 during the unfolding process of the curtain 11 and increasing the unfolding resistance.

[0089] In some embodiments of this application, please refer to Figures 1 to 3 As shown, limit plates 213 are provided on the walls of the accommodating slot 211 on both sides, extending into the accommodating space 210. The limit plates 213 may be spaced apart from the slide 2120, or may be connected to the two walls of the guide rail slot 2122. As long as the slide 2120 can meet the abutment requirements of the pulley 1221 and the accommodating slot 211 can meet the sliding requirements of the above-mentioned curtain 11, this application does not impose any specific restrictions. Since the rigidity of the curtain 11 is not very high, the strength of the upper and lower edges of the curtain 11 is even lower. Therefore, the limit plates 213 can limit the position and shape of the upper and lower edges of the curtain 11 within the accommodating space 210, preventing the upper and lower edges of the curtain 11 from being folded within the accommodating space 210, and ensuring that the curtain 11 can be smoothly unfolded or stored.

[0090] It is understandable that if the rigidity of the screen 11 is too low, the upper edge of the screen 11 will droop downward under the action of gravity after the screen 11 is unfolded, resulting in the screen 11 being unable to present a three-dimensional curved surface state after unfolding. Therefore, in some embodiments of the present application, please refer to Figures 1 to 3 As shown, the curtain 11 is a soft curtain made of hard material, which not only can realize the rolling function but also has a certain rigidity, and can support the state of the curtain 11 when it is unfolded, so that the curtain 11 presents a stable curved surface state.

[0091] In some embodiments of this application, please refer to Figures 1 to 3As shown, a possible structure of the first driving structure 3 is, including a winding shaft 31, two guide wires 32 and a power part, wherein the winding shaft 31 can be rotatably set in the first accommodating column 5, and the upper and lower ends of the winding shaft 31 both have wire accommodating grooves, and the guide wires 32 correspond to the wire accommodating grooves one by one. One end of the guide wire 32 can be wound and set in the wire accommodating groove, and the other end is connected to the upper end or the lower end of the counterweight rod 12. The guide wire 32 is located in the guide structure 2 and between the bottom wall of the guide rail groove 2122 and the edge of the curtain 11. It can not only give the pulley 1221 enough power to slide along the slide 2120, but also be restricted by the guide rail 21 so that the guide wire and the guide rail 21 have the same curvature, so that the curtain 11 can be unfolded into a curved state along the guide rail 21. When the output end of the winding power part 33 rotates, it can drive the winding shaft 31 to rotate. The rotation of the winding shaft 31 will cause the guide wire 32 to be wound into the wire groove. At this time, the end of the guide wire 32 connected to the counterweight rod 12 will pull the counterweight rod 12 along the guide rail 21 toward the side of the winding shaft 31, thereby realizing the unfolding of the curtain 11.

[0092] Furthermore, to prevent the guide wire 32 from escaping from the accommodation space 210 or becoming tangled, in some embodiments of the present application, a retaining track for the guide wire 32 is provided within the guide rail groove 2122. The guide wire 32 is retained within the retaining track to ensure that the guide wire 32 does not exceed its range of movement. Optionally, the guide wire 32 is a nylon rope or a steel wire rope, or another rope or cord, as long as it can be reeled in and pull the counterweight rod 12 to move. This embodiment does not impose any specific limitations.

[0093] A possible structure of the second driving structure 4 is as follows: Figure 2 As shown, it includes a reeling shaft 41 and a reeling power member 42, wherein the reeling shaft 41 is rotatably arranged in the second accommodating column 6, and the end of the curtain 11 away from the counterweight rod 12 is arranged on the reeling shaft 41. The transmission end of the reeling power member 42 is connected to the top or bottom end of the reeling shaft 41, and when the reeling power member 42 is in a non-working state, the transmission end rotates passively. When the transmission end of the reeling power member 42 rotates, it can drive the reeling shaft 41 to rotate, thereby realizing the reeling of the curtain 11 on the reeling shaft 41. Optionally, the reeling power member 42 and the winding power member 33 are both rotary motors, and the rotary motors can directly output rotary power.

[0094] It should be noted that when the curtain 11 is in the unfolding state, the retracting power member 42 is in a non-operating state, and when the curtain 11 is in the retracting state, the winding power member 33 is in a non-operating state. In the non-operating state, the transmission end of the retracting power member 42 rotates passively, while the output end of the winding power member 33 rotates passively. That is, when the curtain 11 is in the unfolding state, the retracting shaft 41 drives the transmission end of the retracting power member 42 to rotate in the direction of unfolding the curtain 11, and when the curtain 11 is in the retracting state, the winding shaft 31 drives the transmission end of the winding power member 33 to rotate in the direction of retracting the curtain 11, thereby ensuring that the curtain 11 can be smoothly retracted or unfolded.

[0095] When the screen 11 is in the unfolded state, to prevent the guide wires 32 at both ends of the guide rail 21 from being accidentally pulled out, in some embodiments of the present application, the left and right ends of the guide structure 2 extend into the first receiving column 5 or the second receiving column 6 on the corresponding side. This ensures that the guide wires 32 are isolated from the outside world and will not be pulled out due to external influences, thereby preventing damage to the projection device.

[0096] In some embodiments of the present application, the projection device also includes a limit switch 7, and the limit switch 7 is provided on the first accommodating column 5 and the second accommodating column 6. When the curtain 11 is unfolded and the counterweight rod 12 hits the limit switch 7 on the second accommodating column 6, the winding power part 33 stops and the curtain 11 remains in the unfolded state, thereby preventing the counterweight rod 12 from overtravel and causing it to leave the slide rail; when the curtain 11 is rolled up, when the counterweight rod 12 hits the limit switch 7 on the first accommodating column 5, the winding power part 42 stops and the curtain 11 remains in the rolled up state, thereby preventing the curtain 11 and the counterweight rod 12 from being torn apart due to the winding power part 42 continuing to rotate after the curtain 11 is rolled into place.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection device, characterized in that: include: A curtain assembly, a first drive structure located on one of the left and right sides of the curtain assembly, a second drive structure located on the other side, and guide structures located at the upper and lower ends of the curtain assembly; in The first driving structure is capable of driving the curtain assembly to unfold along the guide structure; The second driving structure is capable of driving the curtain assembly to be retracted along the guide structure and accommodate the curtain assembly; The guide structure is in an arc shape that bends toward a side away from the projector.

2. The projection device according to claim 1, wherein: The curtain assembly includes: The upper and lower ends of the curtain are slidably arranged in the guide structure, and one of the left and right sides of the curtain is arranged on the second driving structure; A counterweight rod is located on the other side of the curtain, and the upper and lower ends of the counterweight rod are located in the guide structure, abut against the guide structure, and can slide along the guide structure. The first driving structure is connected to the upper and lower ends of the counterweight rod to unfold the curtain.

3. The projection device according to claim 2, wherein: The guide structure comprises: Two guide rails, one at each of the upper and lower ends of the curtain, each having an accommodation space therein, and an accommodation slot provided on the side of the guide rail facing the curtain, so that the upper edge or the lower edge of the curtain can pass through the accommodation slot and be slidably accommodated in the accommodation space; A first limiting structure is provided on a space wall in the accommodating space that is away from the accommodating gap and faces the accommodating gap. A second limiting structure is provided on the end of the counterweight rod. The second limiting structure matches the first limiting structure to limit the upper and lower edges of the curtain within the accommodating space and guide the path of unfolding and retracting the curtain assembly.

4. The projection device according to claim 3, wherein: The guide rail is in an arc shape that bends toward a side away from the projector; The curvature of the arc is 4000R; or The curvature of the arc is the curvature of the image projected by the projector.

5. The projection device according to claim 3, wherein: The first limiting structure includes: A slide and a connecting plate located in the center of the slide and connecting the slide to the space wall; The side of the slide away from the connecting plate has a guide rail groove; The second limiting structure includes: a bracket, buckled on a side of the first limiting structure facing away from the space wall; and Two pulleys are rotatably arranged on the bracket, with one pulley on each side of the connecting plate, and the pulleys are in contact with a side of the slide away from the guide rail groove.

6. The projection device according to claim 3, wherein: The curtain is located between the second limiting structures at both ends of the counterweight rod; The upper and lower edges of the curtain are accommodated between the accommodating seams and the guide rail grooves on the corresponding sides.

7. The projection device according to claim 6, wherein: The distance between the accommodating gap and the bottom wall of the guide rail groove is greater than or equal to 5 cm and less than or equal to 8 cm.

8. The projection device according to claim 3, wherein: The width of the accommodating gap is smaller than the width of the guide rail and larger than the thickness of the curtain.

9. The projection device according to claim 8, wherein: The difference between the width of the accommodating gap and the thickness of the curtain is greater than or equal to 2 mm and less than or equal to 4 mm.

10. The projection device according to claim 3, wherein: Limiting plates are provided on the slit walls on both sides of the accommodating slit toward the accommodating space, and the friction coefficients of the opposite sides of the two limiting plates are smaller than the friction coefficients at other positions of the guide rail.

11. The projection device according to claim 2, wherein: The curtain is a soft curtain made of hard material.

12. The projection device according to any one of claims 2 to 11, characterized in that: The first driving structure includes: The winding shaft is rotatably arranged, and the upper and lower ends of the winding shaft are both provided with wire accommodating grooves; a guide wire, wound in the wire accommodating groove, one end of the guide wire being connected to the groove wall of the wire accommodating groove, and the other end being connected to the upper end or the lower end of the corresponding counterweight rod, the guide wire being located in the guide structure; and The winding power part has an output end connected to the top end or the bottom end of the winding shaft. When the winding power part is in a non-working state, the output end rotates passively.

13. The projection device according to any one of claims 2 to 11, characterized in that: The second driving structure includes: A reeling shaft is rotatably arranged, and an end of the curtain away from the counterweight rod is arranged on the reeling shaft; The retracting power member has a transmission end connected to the top end or the bottom end of the retracting shaft. When the retracting power member is in a non-working state, the transmission end rotates passively.

14. The projection device according to any one of claims 2 to 11, characterized in that: The projection device further includes a first accommodating column and a second accommodating column respectively located on the left and right sides of the guide structure; The first driving structure is located in the first accommodating column, and the second driving structure is located in the second accommodating column. The first accommodating column has an extension groove on the side facing the second accommodating column, and the extension groove allows the curtain to extend from the side of the counterweight rod. The left and right ends of the guide structure extend into the first accommodating column or the second accommodating column on the corresponding side.

15. The projection device according to claim 14, wherein: The width of the extending slot is greater than the thickness of the curtain but smaller than the thickness of the counterweight rod.

16. The projection device according to claim 14, wherein: The projection device further comprises: A limit switch, wherein the first accommodating column and the second accommodating column are both provided with a limit switch; When the curtain is in the reeling state, the counterweight rod contacts the limit switch on the first receiving column, the second driving structure stops, and the reeling is completed; When the curtain is in the unfolding state, the counterweight rod abuts against the limit switch on the second receiving column, the first driving structure stops, and the unfolding is completed.

17. A smart bed, characterized in that: include: A bed and a projection device located at the end of the bed; The projection device is the projection device according to any one of claims 1 to 16.

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