Projection device

Abstract

Embodiments of the present application disclose a projection device, belonging to the field of projection technology. The projection device includes: a storage part having a second accommodation part, the second accommodation part having a first opening, an optical engine for emitting a light beam; a projection screen for receiving the light beam to display an image; a driving mechanism located in the inner cavity of the second accommodation part; and a cover plate, the driving mechanism being capable of driving the cover plate to switch between being accommodated in the inner cavity of the second accommodation part and blocking the area where the first opening is located. In the embodiments of the present application, by providing a cover plate on the second accommodation part, when using the projection device, the driving mechanism drives the cover plate to be accommodated in the inner cavity of the second accommodation part to avoid the first opening, thereby ensuring the normal use of the projection device; when the projection device is not in use, the driving mechanism drives the cover plate to block the area where the first opening is located, thereby avoiding the exposure of the projection screen and effectively protecting the projection screen.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of projection technology, and particularly to a projection device. Background Art

[0002] With the continuous development of technology, projection devices are increasingly applied to people's work and life. Currently, projection devices mainly include an optical engine and a projection screen. Among them, the optical engine is used to emit light beams, and the projection screen is located on the light-emitting side of the optical engine and is used to receive the light beams to realize the display of the picture. Summary of the Invention

[0003] The embodiments of the present application provide a projection device, which can avoid the technical problem that the projection screen cannot be effectively protected. The technical solution is as follows:

[0004] A projection device, the projection device includes:

[0005] A storage part, the storage part has a first accommodation part and a second accommodation part;

[0006] An optical engine, the optical engine is located in the inner cavity of the first accommodation part, the first accommodation part has a light-transmitting opening, and the light beam emitted by the optical engine can pass through the light-transmitting opening;

[0007] A projection screen, the projection screen is fixed in the second accommodation part, the second accommodation part has a first opening, the projection screen can pass through the first opening and be received in the inner cavity of the second accommodation part, or pass through the first opening and unfold, and when the projection screen unfolds, it receives the light beam to display a picture;

[0008] A driving mechanism, the driving mechanism is located in the inner cavity of the second accommodation part;

[0009] A cover plate, the cover plate is connected to the driving mechanism, the driving mechanism can drive the cover plate to switch between being received in the inner cavity of the second accommodation part and blocking the area where the first opening is located, and when the cover plate is received in the inner cavity of the second accommodation part, it avoids the first opening.

[0010] Optionally, the driving mechanism includes a rotating mechanism;

[0011] The rotating mechanism is fixed in the second accommodation part, the rotating mechanism is rotatably connected to the cover plate, the cover plate has a first limiting post, and the first limiting post is movably limited on the side wall of the second accommodation part;

[0012] The connection point between the rotating mechanism and the cover plate, and the straight line where the first limiting post is located are not parallel to the length direction of the cover plate. The rotating mechanism is used to adjust the height of the connection point to control the rotation of the cover plate.

[0013] Optionally, the side wall of the second accommodating portion perpendicular to its own length direction has a first sliding groove, and the limiting post is slidably limited in the first sliding groove.

[0014] Optionally, the first sliding groove is linear, and the length direction of the first sliding groove is not perpendicular to the plane where the first opening is located.

[0015] Optionally, the first sliding groove is arc-shaped, and the opening of the first sliding groove faces away from the rotating mechanism.

[0016] Optionally, the connection point is located at the end of the wide side of the cover plate.

[0017] Optionally, the rotating mechanism includes a lifting rod. The fixed end of the lifting rod is fixed in the second accommodating portion, and the lifting end of the lifting rod is rotatably connected to the cover plate.

[0018] Optionally, the rotating mechanism includes a lifting rod and a connecting rod;

[0019] The fixed end of the lifting rod is fixed in the second accommodating portion, the lifting end of the lifting rod is rotatably connected to the first end of the connecting rod, and the second end of the connecting rod is rotatably connected to the cover plate;

[0020] The side wall of the second accommodating portion has a groove, and the first limiting post is rotatably limited in the groove.

[0021] Optionally, the groove is located in the lifting direction of the lifting rod.

[0022] Optionally, the first limiting post is located at the end of the wide side of the cover plate.

[0023] The beneficial effects of the technical solution provided by the embodiments of the present application can at least include:

[0024] In the embodiments of the present application, by providing a cover plate on the second accommodating portion, when using the projection device, the cover plate is driven by the driving mechanism to be received in the inner cavity of the second accommodating portion to avoid the first opening, so that the projection screen can pass through the first opening and unfold, and then receive the light beam emitted by the optical engine, ensuring the normal use of the projection device; when the projection device is not in use, the cover plate is driven by the driving mechanism to block the area where the first opening is located, thereby avoiding the exposure of the projection screen and effectively protecting the projection screen. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a front view structural schematic diagram of a projection device provided by an embodiment of the present application;

[0027] Figure 2 is a rear view structural schematic diagram of a projection device provided by an embodiment of the present application;

[0028] Figure 3 is a side view cross-sectional structural schematic diagram of a projection device provided by an embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a projection device in which a cover plate blocks a first opening provided by an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of a projection device in which a cover plate avoids a first opening provided by an embodiment of the present application;

[0031] Figure 6 is a state structural schematic diagram of a projection device in which a rotating mechanism drives a cover plate to rotate provided by an embodiment of the present application;

[0032] Figure 7 is another state structural schematic diagram of a projection device in which a rotating mechanism drives a cover plate to rotate provided by an embodiment of the present application;

[0033] Figure 8 is a structural schematic diagram of a side wall of a second accommodating portion provided by an embodiment of the present application;

[0034] Figure 9 is a structural schematic diagram of a cover plate and a connecting rod provided by an embodiment of the present application.

[0035] Reference numerals:

[0036] 1: storage portion; 2: optical engine; 3: projection screen; 4: cover plate; 5: driving mechanism;

[0037] 11: first accommodating portion; 12: second accommodating portion;

[0038] 121: first opening; 122: first sliding groove; 123: second sliding groove;

[0039] 41: first limiting post; 51: rotating mechanism; 511: lifting rod; 512: connecting rod; 5121: second limiting post. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0041] Combined Figure 1 and Figure 2 As shown, the projection device includes: a storage part 11, the storage part 11 having a first accommodation part 11 and a second accommodation part 12; an optical engine 2, the optical engine 2 being located in the inner cavity of the first accommodation part 11, the first accommodation part 11 having a light-transmitting opening, and the light beam emitted by the optical engine 2 being able to pass through the light-transmitting opening; a projection screen 3, the projection screen 3 being fixed in the second accommodation part 12, the second accommodation part 12 having a first opening 121, the projection screen 3 being able to pass through the first opening 121 and be accommodated in the inner cavity of the second accommodation part 12, or pass through the first opening 121 and unfold, and the projection screen 3 receiving the light beam when unfolded to display an image; a driving mechanism 5, the driving mechanism 5 being located in the inner cavity of the second accommodation part 12; a cover plate 4, the cover plate 4 being connected to the driving mechanism 5, the driving mechanism 5 being able to drive the cover plate 4 to switch between being accommodated in the inner cavity of the second accommodation part 12 and blocking the area where the first opening 121 is located, and when the cover plate 4 is accommodated in the inner cavity of the second accommodation part 12, it avoids the first opening 121.

[0042] In the embodiments of the present application, by providing the cover plate 4 on the second accommodation part 12, when using the projection device, as Figure 3 or Figure 5 shown, the driving mechanism 5 drives the cover plate 4 to be accommodated in the inner cavity of the second accommodation part 12 to avoid the first opening 121, so that the projection screen 3 can pass through the first opening 121 and unfold, and then receive the light beam emitted by the optical engine 2, ensuring the normal use of the projection device; when the projection device is not in use, as Figure 4 shown, the driving mechanism 5 drives the cover plate 4 to block the area where the first opening 121 is located, thus avoiding the exposure of the projection screen 3 and providing effective protection for the projection screen 3.

[0043] In addition, when the projection device is not in use, the projection screen 3 can pass through the first opening 121 and be accommodated in the inner cavity of the second accommodation part 12, thereby reducing the overall external dimension of the projection device. When using the projection device, the projection screen 3 can pass through the first opening 121 and unfold, thus ensuring the normal use of the projection device. In addition, through the limitation of the optical engine 2 and the projection screen 3 by the first accommodation part 11 and the second accommodation part 12, the integration of the optical engine 2 and the projection screen 3 is achieved, avoiding the phenomenon of relative displacement between the optical engine 2 and the projection screen 3, and ensuring the display effect of the image on the projection screen 3.

[0044] Among them, for the convenience of accommodating the projection screen 3 into the second accommodating portion 12, the second accommodating portion 12 has a certain length, that is, the second accommodating portion 12 is a long strip-shaped rectangular frame.

[0045] In the embodiment of the present application, the projection device is an ultra-short throw laser projection device. Correspondingly, the optical engine 2 is an ultra-short throw optical engine 2. In this way, a shorter distance can be set between the optical engine 2 and the projection screen 3, so as to realize the miniaturized design of the projection device. Exemplarily, the ultra-short throw optical engine 2 is a DLP (Digital Light Procession) optical engine 2.

[0046] Among them, the specific structures of the light source system, the illumination system, and the lens system included in the optical engine 2 can refer to the related technologies, and the embodiments of the present application do not limit this.

[0047] Exemplarily, a red, green, and blue three-primary-color solid-state laser is used as the light source system, or a solid-state laser is used to excite a fluorescent substance as the light source system, or a solid-state laser is combined with an LED (Light-Emitting Diode) light source as the light source system. The three-primary-color light beams emitted by the light source system are integrally processed by the lenses in the illumination system and then irradiated onto the surface of the DMD (Digital Micromirror Device) in the illumination system. Then, the integrally processed light beams are rotationally reflected by the DMD to the lens system, and then diffused by the lens system and emitted to the projection screen 3 to form a colorful picture on the projection screen 3.

[0048] Among them, the DMD is a display chip containing many small mirrors that can be quickly flipped.

[0049] Optionally, the projection screen 3 includes a screen sheet, a curling component, and a lifting component. The curling component is rotatably limited in the inner cavity of the second accommodating portion 12. The first end of the lifting component is fixed in the second accommodating portion 12. The first side edge of the screen sheet is fixedly connected to the curling component, and the curling component can rotate along its circumferential direction to control the screen sheet to be retracted; the second side edge of the screen sheet is fixedly connected to the lifting component, and the lifting component can drive the second side edge of the screen sheet to rise to control the screen sheet to be unfolded.

[0050] Among them, the structures of the curling component and the lifting component can refer to the related technologies, and the embodiments of the present application do not limit this.

[0051] In the embodiment of the present application, when the driving mechanism 5 drives the cover plate 4 to be accommodated in the inner cavity of the second accommodating portion 12 or to block the area where the first opening 121 is located, in some embodiments, such as Figure 6 or Figure 7 As shown, the driving mechanism 5 includes a rotating mechanism 51.

[0052] When the driving mechanism 5 includes a rotating mechanism 51, the cover plate 4 can be driven by the rotating mechanism 51 to rotate below the area where the first opening 121 is located, so as to block the area where the first opening 121 is located. At this time, the projection of the area where the first opening 121 is located on the plane where the cover plate 4 is located is completely located on the cover plate 4. Or the cover plate 4 can be driven by the rotating mechanism 51 to rotate to the area where the first opening 121 is located, so as to block the area where the first opening 121 is located. At this time, the cover plate 4 coincides with the area where the first opening 121 is located.

[0053] Optionally, when the cover plate 4 rotates to the area where the first opening 121 is located, both long sides of the cover plate 4 have arc chamfers, and the positions corresponding to the two long sides of the cover plate 4 on the edge of the first opening 121 also have arc chamfers, so as to reduce the gap between the edge of the cover plate 4 and the edge of the first opening 121.

[0054] In the embodiment of the present application, as Figure 6 or Figure 7 shown, the rotating mechanism 51 is within the second accommodating portion 12. The rotating mechanism 51 is rotatably connected to the cover plate 4. The cover plate 4 has a first limiting post 41, and the first limiting post 41 is movably limited on the side wall of the second accommodating portion 12; the connection point between the rotating mechanism 51 and the cover plate 4, and the straight line where the first limiting post 41 is located are not parallel to the length direction of the cover plate 4. The rotating mechanism 51 is used to adjust the height of the connection point to control the rotation of the cover plate 4.

[0055] In this way, by adjusting the height of the connection point by the rotating mechanism 51, that is, by adjusting the height of the local position of the cover plate 4 by the rotating mechanism 51. At this time, the cover plate 4 rotates relative to the side wall of the second accommodating portion 12 based on the first limiting post 41, so as to realize the rotation of the cover plate 4. When the cover plate 4 rotates, the plane where the cover plate 4 is located rotates, so as to be received into the inner cavity of the second accommodating portion 12, or block the area where the first opening 121 is located.

[0056] In some embodiments, as Figure 8 shown, the side wall of the second accommodating portion 12 perpendicular to its own length direction has a first sliding groove 122, and the limiting post is slidably limited in the first sliding groove 122. In this way, when adjusting the height of the connection point by the rotating mechanism 51, the cover plate 4 rotates in the first sliding groove 122 based on the first limiting post 41 to realize the rotation of the cover plate 4, and at the same time, the first limiting post 41 slides in the first sliding groove 122.

[0057] Among them, as Figure 9 shown, the first limiting post 41 is located on the wide side of the cover plate 4. Optionally, the first limiting post 41 is located at the end of the wide side of the cover plate 4, or at the middle position of the wide side of the cover plate 4, and the length direction of the first limiting post 41 is perpendicular to the connected wide side.

[0058] Among them, the connection point between the rotating mechanism 51 and the cover plate 4 is located at the end of the wide side of the cover plate 4. Of course, the connection point between the rotating mechanism 51 and the cover plate 4 can be located on the long side of the cover plate 4 or at other positions of the cover plate 4, as long as the rotating mechanism 51 can drive the cover plate 4 to rotate based on the first limiting post 41. The embodiments of the present application do not make any limitations in this regard.

[0059] It should be noted that when the rotating mechanism 51 is connected to the wide side or the long side of the cover plate 4, the rotating mechanism 51 is connected to the cover plate 4 at a position close to the bottom surface, that is, the connection point between the rotating mechanism 51 and the cover plate 4 is located close to the bottom surface of the cover plate 4, so that the cover plate 4 can rotate to the area where the first opening 121 is located. Wherein, the bottom surface of the cover plate 4 refers to the surface facing the inner cavity of the second accommodating portion 12 when the cover plate 4 blocks the area where the first opening 121 is located.

[0060] Optionally, the first chute 122 is linear, and the length direction of the first chute 122 is not perpendicular to the plane where the first opening 121 is located. For example, the length direction of the first chute 122 is parallel to the plane where the first opening 121 is located. Or as Figure 8 shown, the first chute 122 is arc-shaped, and the opening of the first chute 122 faces away from the rotating mechanism 51.

[0061] Optionally, the rotating mechanism 51 includes a lifting rod 511. The fixed end of the lifting rod 511 is fixed in the second accommodating portion 12, and the lifting end of the lifting rod 511 is rotatably connected to the cover plate 4.

[0062] Among them, the lifting rod 511 is fixed in the second accommodating portion 12 along the vertical direction, that is, the lifting direction of the lifting rod 511 is perpendicular to the plane where the first opening 121 is located. Of course, the lifting direction of the lifting rod 511 can also form a certain angle with the vertical direction. The embodiments of the present application do not make any limitations in this regard.

[0063] Optionally, as Figure 6 or Figure 7 shown, the rotating mechanism 51 includes a lifting rod 511 and a connecting rod 512. When the length direction of the connecting rod 512 is perpendicular to the plane where the first opening 121 is located, the fixed end of the lifting rod 511 is fixed in the second accommodating portion 12, the lifting end of the lifting rod 511 is fixedly connected to the first end of the connecting rod 512, and the second end of the connecting rod 512 is rotatably connected to the cover plate 4. At this time, the connecting rod 512 and the lifting rod 511 are located on the same straight line.

[0064] When the length direction of the connecting rod 512 is not perpendicular to the plane where the first opening 121 is located, the fixed end of the lifting rod 511 is fixed in the second accommodating portion 12, the lifting end of the lifting rod 511 is rotatably connected to the first end of the connecting rod 512, and the second end of the connecting rod 512 is fixedly connected to or rotatably connected to the cover plate 4.

[0065] Exemplarily, as Figure 7 shown, the length direction of the connecting rod 512 is parallel to the wide side of the cover plate 4. At this time, the lifting end of the lifting rod 511 is rotatably connected to the first end of the connecting rod 512, and the second end of the connecting rod 512 is fixedly connected to the cover plate 4. In this way, by the extension of the connecting rod 512 in the width direction of the cover plate 4, the rotation radius of the cover plate 4 can be increased, so as to ensure that when the cover plate 4 rotates to be received in the inner cavity of the second accommodating portion 12, the plane where the cover plate 4 is located is parallel to the side wall of the second accommodating portion 12, so that the cover plate 4 completely avoids the area where the first opening 121 is located.

[0066] Among them, when the first end of the connecting rod 512 is rotatably connected to the lifting end of the lifting rod 511, in order to ensure the stability of the movement of the first end of the connecting rod 512, as Figure 8 and Figure 9 shown, the first end of the connecting rod 512 has a second limiting post 5121, and the side wall of the second accommodating portion 12 has a second sliding groove 123. The second sliding groove 123 is linear, and the second limiting post 5121 is slidably limited in the second sliding groove 123. In this way, through the limitation of the second limiting post 5121 by the second sliding groove 123, the possibility of the first end of the connecting rod 512 shaking is avoided, the stability of the movement of the connecting rod 512 is ensured, and thus the stability of the rotation of the cover plate 4 is ensured.

[0067] In some other embodiments, the rotating mechanism 51 includes a lifting rod 511 and a connecting rod 512; the fixed end of the lifting rod 511 is fixed in the second accommodating portion 12, the lifting end of the lifting rod 511 is rotatably connected to the first end of the connecting rod 512, and the second end of the connecting rod 512 is rotatably connected to the cover plate 4; the side wall of the second accommodating portion 12 has a groove, and the first limiting post 41 is rotatably limited in the groove.

[0068] In this way, by the first limiting post 41 being rotatably limited in the groove, when the first end of the connecting rod 512 is lifted and lowered by the lifting rod 511, the driving of the connecting rod 512 is realized, and then the driving of the cover plate 4 is driven, so as to realize the rotation of the cover plate 4 with the center line direction of the first limiting post 41 as the rotation axis.

[0069] Optionally, the groove is located in the lifting direction of the lifting rod 511. In this way, through the cooperation of the lifting rod 511 and the connecting rod 512, when the cover plate 4 rotates and is received in the second accommodating portion 12, the avoidance degree of the cover plate 4 to the first opening 121 is ensured.

[0070] Of course, the groove can also deviate from the lifting direction of the lifting rod 511, as long as it is ensured that when the cover plate 4 avoids the first opening 121, it will not affect the retraction or deployment of the projection screen 3. The embodiments of the present application do not make any limitations in this regard.

[0071] Among them, the first limiting post 41 is located at the end of the wide side of the cover plate 4. At this time, the groove is located on the side wall perpendicular to its own length direction in the second accommodating portion 12. Of course, the first limiting post 41 is located on the long side of the cover plate 4. At this time, the groove is located on the side wall parallel to its own length direction in the second accommodating portion 12.

[0072] When the first limiting post 41 is located on the long side of the cover plate 4, the first limiting post 41 is limited in the groove through the rotating shaft to ensure the rotatability of the first limiting post 41 in the groove.

[0073] It should be noted that in order to prevent the cover plate 4 from rotating and being received in the second accommodating portion 12, the surface where the cover plate 4 is located is parallel to the length direction of the connecting rod 512 and is also parallel to the lifting direction of the lifting rod 511, resulting in difficulty for the lifting rod 511 to drive the first end of the connecting rod 512 to rise, and thus difficulty in driving the cover plate 4 to rotate to block the area where the first opening 121 is located. The second accommodating portion 12 has a baffle on the side wall perpendicular to the length direction. Among them, the baffle and the connecting rod 512 are on the same side of the lifting rod 511. In this way, through the limitation of the baffle, the rotation angle of the cover plate 4 is limited to an acute angle by the baffle.

[0074] In the embodiment of the present application, in addition to driving the cover plate 4 to be received in the inner cavity of the first accommodating portion 11 or blocking the area where the light-transmitting opening is located through the above-mentioned rotating mechanism 51, of course, the driving mechanism 5 may also include a translation mechanism, or a translation mechanism and a lifting mechanism, and then drive the cover plate 4 to be received in the inner cavity of the first accommodating portion 11 or block the area where the light-transmitting opening is located through the translation mechanism, or the translation mechanism and the lifting mechanism.

[0075] When the driving mechanism 5 only includes a translation mechanism, the projection of the cover plate 4 on the plane where the light-emitting side of the second accommodating portion 12 is located can cover the area where the first opening 121 is located, and the distance between the edge of the cover plate 4 and the edge of the first opening 121 is greater than or equal to the first distance threshold to ensure the shielding effect of the cover plate 4 on the first opening 121. Optionally, the first distance threshold is 1 cm, 2 cm, 5 cm, etc., and the embodiment of the present application does not limit this. In addition, the distance between the upper surface of the cover plate 4 and the lower surface of the light-emitting side of the second accommodating portion 12 is less than or equal to the second distance threshold to reduce the gap between the cover plate 4 and the light-emitting side of the second accommodating portion 12, thereby ensuring the shielding effect of the cover plate 4 on the first opening 121. Optionally, the second distance threshold is 1 mm, 1.5 mm, 2 mm, etc., as long as it does not affect the relative sliding between the cover plate 4 and the light-emitting side of the second accommodating portion 12, and the embodiment of the present application does not limit this.

[0076] Optionally, the translation mechanism includes a driving component; the driving component is connected to the cover plate 4, and the driving component can drive the cover plate 4 to move. In this way, the driving component can provide a power source for the cover plate 4, and then when the cover plate 4 needs to move, the driving component drives the cover plate 4 to move, so as to realize that the cover plate 4 is received in the inner cavity of the second accommodating portion 12 or covers the area where the first opening 121 is located.

[0077] Wherein, the direction in which the driving component drives the cover plate 4 to move is perpendicular to the length direction of the first opening 121.

[0078] In the embodiment of the present application, the driving component is an electric driving component or a manual driving component.

[0079] When the driving component is an electric driving component, in some embodiments, the driving component is an electric telescopic rod, the electric telescopic rod is fixed in the second accommodating portion 12, and the extending end of the electric telescopic rod is connected to the cover plate 4.

[0080] Wherein, the telescopic direction of the electric telescopic rod is parallel to the plane where the first opening 121 is located. Exemplarily, the telescopic direction of the electric telescopic rod is perpendicular to the length direction of the first opening 121.

[0081] Optionally, the distance from the fixed end of the electric telescopic rod to the first side wall of the second accommodating portion 12 is less than the distance from the first opening 121 to the first side wall of the second accommodating portion 12. The first side wall of the second accommodating portion 12 refers to a side wall that is on the same side of the first opening 121 as the fixed end of the electric telescopic rod in the width direction.

[0082] During actual use, the driving component further includes a controller, the controller is electrically connected to the electric telescopic rod, and when the controller receives a signal to use the projection device, it sends a first control signal to the electric telescopic rod to control the electric telescopic rod to shorten. Then, during the shortening process of the electric telescopic rod, the cover plate 4 is driven to move in the direction close to the fixed end of the electric telescopic rod, so as to realize that the cover plate 4 is received in the inner cavity of the second accommodating portion 12. When the controller receives a signal to pause using the projection device, it sends a second control signal to the electric telescopic rod to control the electric telescopic rod to extend. Then, during the extension process of the electric telescopic rod, the cover plate 4 is driven to move in the direction away from the fixed end of the electric telescopic rod, so as to realize that the cover plate 4 covers the area where the first opening 121 is located.

[0083] In some other embodiments, the driving component includes a driving motor and a conveyor belt; the driving motor is fixed in the second accommodating portion 12, the conveyor belt is rotatably limited in the second accommodating portion 12, the driving motor is in transmission connection with the conveyor belt, and the conveyor belt is connected to the cover plate 4.

[0084] Among them, the side wall of the second accommodating part 12 has a rotating shaft, and the conveyor belt is rotatably limited through the output shaft of the driving motor and this rotating shaft. The conveying direction of the conveyor belt is perpendicular to the length direction of the first opening 121.

[0085] Optionally, the distance from the driving motor to the first side wall of the second accommodating part 12 is less than the distance from the first opening 121 to the first side wall of the second accommodating part 12. The first side wall of the second accommodating part 12 refers to a side wall that is on the same side of the first opening 121 as the driving motor in the width direction.

[0086] During actual use, the driving assembly further includes a controller, and the controller is electrically connected to the driving motor. When the controller receives a signal for using the projection device, it sends a third control signal to the driving motor to control the driving motor to rotate forward. Then, during the forward rotation of the driving motor, the cover plate 4 is driven by the conveyor belt to move in the direction close to the driving motor, so as to realize that the cover plate 4 is received in the inner cavity of the second accommodating part 12. When the controller receives a signal for pausing the use of the projection device, it sends a fourth control signal to the driving motor to control the driving motor to rotate reversely. Then, during the reverse rotation of the driving motor, the cover plate 4 is driven by the conveyor belt to move in the direction away from the driving motor, so as to realize that the cover plate 4 shields the area where the first opening 121 is located.

[0087] When the driving assembly is a manual driving assembly, in some embodiments, the driving assembly includes a toggle button. The side wall of the second accommodating part 12 has a sliding groove. The first end of the toggle button is connected to the cover plate 4, and the second end of the toggle button passes through the sliding groove and extends out of the second accommodating part 12. The toggle button can slide in the sliding groove.

[0088] Among them, the sliding groove is located on one side of the second accommodating part 12 parallel to the width direction. The length direction of the sliding groove is parallel to the plane where the first opening 121 is located.

[0089] During actual use, when using the projection device, the toggle button is toggled in the direction away from the first opening 121 to drive the cover plate 4 to move synchronously, so as to realize that the cover plate 4 is received in the inner cavity of the second accommodating part 12. When pausing the use of the projection device, the toggle button is toggled in the direction close to the first opening 121 to drive the cover plate 4 to move synchronously, so as to realize that the cover plate 4 shields the area where the first opening 121 is located.

[0090] It should be noted that when the translation mechanism only includes the driving assembly, the driving assembly and the cover plate 4 are located in the same plane, so that the driving assembly can drive the cover plate 4 to move in a plane parallel to the light-emitting side plane of the second accommodating part 12.

[0091] When the driving component is located below the cover plate 4, in order to facilitate the connection between the driving component and the cover plate 4, optionally, the translation mechanism further includes a moving component, which is respectively connected to the driving component and the cover plate 4. The driving component drives the cover plate 4 to move through the moving component. In this way, through the connection of the moving component to the driving component and the cover plate 4, the cover plate 4 can be driven to move synchronously by the moving component under the driving action of the driving component.

[0092] Exemplarily, the moving component is a push plate. The first side of the push plate is fixedly connected to the driving component, and the second side of the push plate is connected to the cover plate 4. Of course, the moving component can be other structures in addition to the push plate, as long as it can realize the connection between the driving component and the cover plate 4, and when the driving component drives the moving component to move, the moving component can drive the cover plate 4 to move synchronously. The embodiments of the present application do not limit this.

[0093] Optionally, the inner wall of the second accommodating portion 12 has a slide rail, and the moving component is slidably limited on the slide rail. Exemplarily, when the moving component is a push plate, the push plate is slidably limited on the slide rail. In this way, through the limitation of the moving component by the slide rail, the sliding direction of the moving component is ensured, and the possibility of the moving component driving the cover plate 4 to shake synchronously is avoided.

[0094] Among them, the slide rail is located on the inner wall of the second accommodating portion 12 on the side parallel to the width direction, and the length direction of the slide rail is parallel to the plane where the first opening 121 is located.

[0095] Optionally, the cross section of the push plate is L-shaped. At this time, there is a certain interval between the edge of the cover plate 4 and the side wall of the second accommodating portion 12. Of course, when the push plate is of a rectangular structure, the distance between the edge of the cover plate 4 and the side wall of the second accommodating portion 12 is smaller.

[0096] In the embodiments of the present application, when the driving mechanism 5 further includes a lifting mechanism, the projection of the cover plate 4 on the plane where the first opening 121 is located is located within the area where the first opening 121 is located, and the distance between the edge of the cover plate 4 and the edge of the first opening 121 is less than or equal to the third distance threshold. In this way, after the cover plate 4 is driven by the translation mechanism to move to the area where the first opening 121 is located, the cover plate 4 can be driven to lift and lower by the lifting mechanism so that the upper surface of the cover plate 4 is flush with the upper surface of the second accommodating portion 12, thereby ensuring the overall aesthetics of the projection device while achieving the occlusion of the first opening 121. Optionally, the third distance threshold is 0.5 mm, 1 mm, 1.5 mm, etc. The embodiments of the present application do not limit this.

[0097] For the convenience of installing the lifting mechanism, the projection device further includes a support plate; the support plate is fixed in the inner cavity of the second accommodating portion 12 and is located below the cover plate 4. The support plate has a second opening, and the projection area of the second opening on the plane where the first opening 121 is located covers the area where the first opening 121 is located, or coincides with the area where the first opening 121 is located; the lifting mechanism is supported on the support plate, and the lifting mechanism is connected to the cover plate 4 and can control the cover plate 4 to rise or fall.

[0098] In this way, since the projection of the second opening on the support plate in the plane on the light-emitting side of the second accommodating portion 12 at least coincides with the area where the first opening 121 is located, the support plate does not affect the unfolding of the projection screen 3. In addition, when using the projection device, the cover plate 4 can be controlled to fall by the lifting mechanism, and then the cover plate 4 can be controlled to move by the translation mechanism to be received in the inner cavity of the second accommodating portion 12. When the projection device is suspended from use, when the cover plate 4 is driven by the translation mechanism to move to the area where the first opening 121 is located, the cover plate 4 is controlled to rise by the lifting mechanism to block the first opening 121.

[0099] Among them, when the lifting mechanism controls the cover plate 4 to rise, the upper surface of the cover plate 4 is flush with the upper surface of the second accommodating portion 12, ensuring the aesthetics when the projection device is not in use. In order to ensure that the upper surface of the cover plate 4 is flush with the upper surface of the second accommodating portion 12, the thickness of the cover plate 4 is greater than the thickness of the side of the second accommodating portion 12 where the first opening 121 is located.

[0100] Optionally, the lifting mechanism is a lifting frame. In this way, when the cover plate 4 is lifted and lowered by the lifting frame, in order to avoid the limitation of the cover plate 4 caused by the connection between the translation mechanism and the cover plate 4, the cover plate 4 can move in a direction perpendicular to the light-emitting side of the second accommodating portion 12 relative to the driving component or the moving component. That is to say, between the cover plate 4 and the driving component or the moving component, only the limit can be carried out in the plane where the first opening 121 is located, and the limit cannot be carried out in the direction perpendicular to the plane where the first opening 121 is located.

[0101] Among them, the lifting frame is an electric lifting frame. In actual use, the lifting mechanism further includes a controller, and the controller is electrically connected to the lifting frame. When the controller receives a signal to use the projection device, a fifth control signal is sent to the lifting frame to control the lifting frame to fall, thereby driving the cover plate 4 to fall. Then, the cover plate 4 is received in the inner cavity of the second accommodating portion 12 under the action of the translation mechanism. When the controller receives a signal to suspend the use of the projection device, after the translation mechanism drives the cover plate 4 to move to the area where the first opening 121 is located, the controller sends a sixth control signal to the lifting frame to control the lifting frame to rise, thereby driving the cover plate 4 to rise to block the area where the first opening 121 is located.

[0102] It should be noted that the controller included in the lifting mechanism and the controller included in the above-mentioned driving component may be the same controller. Of course, the controller included in the lifting mechanism and the controller included in the above-mentioned driving component may also be different controllers. The embodiments of the present application do not limit this.

[0103] Optionally, the lifting mechanism includes a sliding rod and a rotating frame; there is a slideway on one side of the support plate close to the light-emitting side, the sliding rod is slidably limited in the slideway, the sliding rod is fixedly connected to the moving component, the first end of the rotating frame is connected to the sliding rod, the second end of the rotating frame is connected to the cover plate 4, and the plane where the rotating frame is located is not parallel to the light-emitting side; the support plate also has a baffle. When the cover plate 4 is received in the inner cavity of the second accommodating portion 12, the distance between the first end of the rotating frame and the baffle is greater than the distance between the second end of the rotating frame and the baffle. When the cover plate 4 covers the area where the first opening 121 is located, the distance between the first end of the rotating frame and the baffle is greater than or equal to the distance between the second end of the rotating frame and the baffle.

[0104] In this way, when using the projection device, the driving component drives the sliding rod to slide in the slideway on the support plate through the moving component. At this time, the sliding rod drives the rotating frame to rotate to reduce the angle between the plane where the rotating frame is located and the horizontal plane, so as to realize the lowering of the cover plate 4. Then the driving component continues to drive the sliding rod to slide through the moving component, and the cover plate 4 continues to move under the drive of the sliding rod, so as to realize the accommodation of the cover plate 4 in the inner cavity of the second accommodating portion 12. When the projection device is suspended from use, the driving component drives the sliding rod to slide in the slideway on the support plate through the moving component, and then drives the cover plate 4 to move through the rotating bracket when the sliding rod slides. Since the distance between the first end of the rotating frame and the baffle is greater than the distance between the second end of the rotating frame and the baffle, when the cover plate 4 drives the rotating frame to move, the baffle first contacts the second end of the rotating frame to limit the second end of the rotating frame. At this time, when the sliding rod continues to move, the rotating frame can rotate to increase the angle between the plane where the rotating frame is located and the horizontal plane, so as to realize the raising of the cover plate 4, so that the upper surface of the cover plate 4 is flush with the upper surface of the second accommodating portion 12, thereby realizing the shielding of the first opening 121 by the cover plate 4.

[0105] Among them, the rotating frame has a Z-shaped structure. The first end of the rotating frame is rotatably connected to the sliding rod, and the second end of the rotating frame is fixedly connected to the cover plate 4. Alternatively, the first end of the rotating frame is fixedly connected to the sliding rod, and the second end of the rotating frame is rotatably connected to the cover plate 4. In this way, when the first end of the rotating frame is rotatably connected to the sliding rod and the second end of the rotating frame is fixedly connected to the cover plate 4, the rotating frame can rotate around the second end as the rotation center under the limitation of the baffle, so as to reduce or increase the angle between the plane where it is located and the horizontal plane. When the first end of the rotating frame is fixedly connected to the sliding rod and the second end of the rotating frame is rotatably connected to the cover plate 4, the rotating frame can rotate around the first end as the rotation center under the limitation of the baffle, so as to reduce or increase the angle between the plane where it is located and the horizontal plane.

[0106] Among them, the length direction of the slideway on the support plate is parallel to the width direction of the second accommodating portion 12.

[0107] In the embodiment of the present application, not only can the first opening 121 be blocked or avoided in the above manner, but of course, the light-transmitting opening of the first accommodating portion can also be blocked or avoided in the same or similar manner as the above manner, so as to effectively protect the optical engine. The manner of protecting the optical engine in the embodiment of the present application will not be elaborated here.

[0108] In the embodiment of the present application, by providing a cover plate on the second accommodating portion, when using the projection device, the cover plate is driven by the rotating mechanism to be received in the inner cavity of the second accommodating portion to avoid the first opening, so that the projection screen can normally extend out of the second accommodating portion to be unfolded, ensuring the normal use of the projection device; when the projection device is not in use, the cover plate is driven by the rotating mechanism to block the area where the first opening is located, thus avoiding the exposure of the projection screen and effectively protecting the projection screen. In addition, when the projection device is not in use, the projection screen can pass through the first opening and be received in the inner cavity of the second accommodating portion, thereby reducing the overall appearance size of the projection device. By limiting the optical engine and the projection screen through the first accommodating portion and the second accommodating portion, the integration of the optical engine and the projection screen is realized, avoiding the relative displacement between the optical engine and the projection screen, and ensuring the display effect of the picture on the projection screen.

[0109] The above are only illustrative embodiments of the embodiments of the present application, and are not intended to limit the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A projection device, characterized in that, the projection device includes: a storage part, the storage part having a first accommodation part and a second accommodation part; an optical engine, the optical engine being located in the inner cavity of the first accommodation part, the first accommodation part having a light-transmitting opening, and the light beam emitted by the optical engine being able to pass through the light-transmitting opening; a projection screen, the projection screen being fixed in the second accommodation part, the second accommodation part having a first opening, and the projection screen being able to be received in the inner cavity of the second accommodation part through the first opening, or passing through the first opening and unfolding, and when the projection screen unfolds, receiving the light beam to display an image; a driving mechanism, the driving mechanism being located in the inner cavity of the second accommodation part; a cover plate, the cover plate being connected to the driving mechanism, and the driving mechanism being able to drive the cover plate to switch between being received in the inner cavity of the second accommodation part and covering the area where the first opening is located, and when the cover plate is received in the inner cavity of the second accommodation part, it avoids the first opening; the driving mechanism includes a rotating mechanism, and the rotating mechanism includes a lifting rod and a connecting rod; the fixed end of the lifting rod is fixed in the second accommodation part, the lifting end of the lifting rod is rotatably connected to the first end of the connecting rod, and the second end of the connecting rod is rotatably connected to the cover plate; the cover plate has a first limiting post, the first end of the connecting rod has a second limiting post, and the side wall of the second accommodation part has a first sliding groove and a second sliding groove, and the first limiting post is rotatably limited in the first sliding groove, and the second limiting post is rotatably limited in the second sliding groove; wherein, the first sliding groove is arc-shaped, the opening of the first sliding groove faces away from the rotating mechanism, the second sliding groove is linear, and the length direction of the second sliding groove is perpendicular to the plane where the first opening is located.

2. The projection device according to claim 1, characterized in that, the connection point between the rotating mechanism and the cover plate, and the straight line where the first limiting post is located are not parallel to the length direction of the cover plate, and the rotating mechanism is used to adjust the height of the connection point to control the rotation of the cover plate.

3. The projection device according to claim 2, characterized in that, the connection point is located at the end of the wide side of the cover plate.

4. The projection device according to claim 1, characterized in that, the first limiting post is located at the end of the wide side of the cover plate.

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