Projection equipment

Abstract

The invention provides projection equipment, and relates to the technical field of projection. According to the projection equipment, the projection angle can be adjusted through the projection equipment, and meanwhile linkage with functional parts in the projection equipment is achieved. The projection equipment comprises a base body, a support, a projection host and a lifting piece, and the base body comprises a base and a cover body; the bracket is arranged on the cover body; the projection host is rotationally connected with the bracket and is used for generating a projection picture; the lifting part is movably arranged on the cover body, and a driving assembly is arranged between the projection host and the lifting part. The projection equipment is used for projecting images or videos.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a projection device. Background Art

[0002] As a household appliance, projection equipment has been used by more and more families because of its convenience and rich functions.

[0003] Existing projection equipment usually only has the functions of projecting images and playing audio and video. When the projection angle needs to be adjusted, it is often necessary to use an external support frame to adjust the projection angle. In the process of adjusting the projection angle, it cannot realize linkage with other functional parts. Summary of the invention

[0004] The present application provides a projection device, which can realize linkage with functional parts in the projection device while adjusting the projection angle through the projection device itself.

[0005] On the one hand, the present application provides a projection device, including: a base, a bracket, a projection host and a lifting member, wherein the base includes a base and a cover body that are rotatably connected; the bracket is arranged on the cover body, and the bracket can rotate relative to the base under the drive of the cover body; the projection host is rotatably connected to the bracket and is located on a side of the cover body away from the base, and the projection host can rotate relative to the bracket to generate a projection picture; the lifting member is movably arranged on the cover body, and a driving assembly is arranged between the projection host and the lifting member; wherein, during the rotation of the projection host relative to the bracket, under the action of the driving assembly, the lifting member can move relative to the cover body.

[0006] The projection device provided in the embodiment of the present application is provided with a base including a rotatably connected base and a cover body, so that the base can provide support for the projection device, and the projection device can be fixed in the installation position through the base; and a bracket is provided on the cover body, so that the projection host can be easily connected to the base through the bracket; and the projection host is rotatably connected to the bracket, so that the projection host can rotate relative to the bracket, so that the pitch angle of the projection host can be adjusted, and the cover body can be rotated relative to the base, so that the bracket drives the projection host to rotate, so that the projection host can rotate relative to the base, so that the projection angle can be adjusted within a larger range. At the same time, a lifting member is movably provided on the cover body, and a driving assembly is provided between the projection host and the lifting member, so that the lifting member can be moved relative to the cover body through the action of the driving assembly while the projection host is moved to adjust the projection angle, so that the lifting member as a functional member in the projection device can be linked with the projection host, so that the projection device has more application functions.

[0007] Compared with the related art, which uses an external support frame to adjust the projection angle of the projection host, the projection device of the embodiment of the present application rotatably connects the cover body and the base, and rotatably connects the projection host and the bracket set on the cover body, so that the projection angle can be adjusted through the structure of the projection device itself. Therefore, the projection device provided by the embodiment of the present application can realize the linkage with the functional parts in the projection device while adjusting the projection angle through the projection device itself.

[0008] In a possible implementation of the present application, the driving assembly includes a first magnetic component and a second magnetic component; wherein the first magnetic component is fixed on the lifting component, and the second magnetic component is fixed on the projection host at a position corresponding to the first magnetic component.

[0009] In one possible implementation of the present application, the relationship between the distances between the first magnetic component and the second magnetic component and the electromagnetic device in the projection device is: H1×L1×b1<Hmin, where H1 represents the magnetic field strength of the first magnetic component, L1 represents the distance between the first magnetic component and the electromagnetic device, Hmin represents the minimum magnetic field strength of the electromagnetic device affected by the magnetic field, and b1 is a constant; H2×L2×b2<Hmin, where H2 represents the magnetic field strength of the second magnetic component, L2 represents the distance between the second magnetic component and the electromagnetic device, Hmin represents the minimum magnetic field strength of the electromagnetic device affected by the magnetic field, and b2 is a constant.

[0010] In one possible implementation of the present application, when the lifting member moves in a direction away from the base under the action of the magnetic attraction between the first magnetic member and the second magnetic member, the relationship between the magnetic attraction between the first magnetic member and the second magnetic member and the gravity of the lifting member is: F1×B1×a1>G+f, wherein F1 represents the magnetic attraction between the first magnetic member and the second magnetic member, B1 represents the distance between the first magnetic member and the second magnetic member, G represents the gravity of the lifting member, f represents the friction between the lifting member and the substrate, and a1 is a constant.

[0011] In one possible implementation of the present application, an avoidance groove is provided on the lifting member on the side close to the projection host; the maximum rotation radius R of the projection host around the bracket, the distance A between the lifting member and the rotating axis of the projection host when the lifting member is located far away from the base, and the distance D between the avoidance groove and the projection host when the lifting member is located close to the base, the relationship among the three is: A+D≥R.

[0012] In a possible implementation of the present application, the projection host and the bracket are rotatably connected via a pivot mechanism; the pivot mechanism comprises: a pivot, a first rotating member and a second rotating member, wherein the pivot extends in its radial direction to form a convex ring; the first rotating member is fixedly connected to the bracket, the first rotating member is sleeved on one end of the pivot, and slides against one side of the convex ring and can rotate relative to the convex ring; the second rotating member is fixedly connected to the projection host, the second rotating member is sleeved on one end of the pivot away from the first rotating member, and slides against a side of the convex ring away from the first rotating member and can rotate relative to the convex ring.

[0013] In a possible implementation of the present application, the rotating shaft mechanism also includes a first driving member and a first transmission member; the first driving member is fixed on the second rotating member, the first transmission member is fixedly connected to the rotating shaft, and is transmission-connected to the first driving member; under the drive of the first driving member, the first transmission member drives the rotating shaft to rotate relative to the first rotating member or the second rotating member, so that the projection host rotates relative to the bracket.

[0014] In a possible implementation of the present application, the rotating shaft mechanism also includes a first elastic component and a second elastic component; the first elastic component is sleeved on the rotating shaft and abuts against the first rotating member, and the clamping force between the first rotating member and the convex ring can be adjusted through the first elastic component to adjust the friction force between the first rotating member and the convex ring; the second elastic component is sleeved on the rotating shaft and abuts against the second rotating member, and the clamping force between the second rotating member and the convex ring can be adjusted through the second elastic component to adjust the friction force between the second rotating member and the convex ring.

[0015] In one possible implementation of the present application, the projection device also includes an angle measuring component, which is arranged between the bracket and the projection host and is electrically connected to the first driving member. The angle measuring component is used to measure the rotation angle of the projection host relative to the bracket, and can send a control signal to the first driving member according to the rotation angle.

[0016] In a possible implementation of the present application, the base and the cover are rotatably connected via a rotating mechanism, and the cover can be rotated relative to the base when driven by the rotating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A partial structural diagram of the projection device provided for this application;

[0018] Figure 2 A partial exploded view of the projection device provided for this application;

[0019] Figure 3 A partial cross-sectional view of the projection device provided for this application;

[0020] Figure 4A top view of a base and a lifting member in a projection device provided in the present application;

[0021] Figure 5 A cross-sectional view of a rotating shaft mechanism in a projection device provided in the present application;

[0022] Figure 6 Provided for this application Figure 5 A partial enlarged view of the middle M part;

[0023] Figure 7 A cross-sectional view of the angle measurement component in the projection device provided in this application.

[0024] Description of reference numerals:

[0025] 1-base; 11-base; 12-cover; 121-guide groove; 13-accommodating chamber; 2-bracket; 21-bracket shaft; 3-projection host; 31-host housing; 4-lifting member; 41-guide protrusion; 42-avoidance groove; 5-driving assembly; 51-first magnetic member; 52-second magnetic member; 53-fixed seat; 6-rotating mechanism; 61-rotating shaft; 611-convex ring; 62-first rotating member; 63-second rotating member; 64-first transmission member; 65-first elastic assembly; 651-first disc spring; 652-second disc spring; 66-second elastic assembly; 661-third disc spring; 662-fourth disc spring; 67-first fastener; 68-second fastener; 69-friction plate; 7-angle measurement assembly; 71-Hall element; 72-third magnetic member; 8-rotating mechanism. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0027] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0028] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0029] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0030] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0031] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0032] An embodiment of the present application provides a projection device, the working principle of which is to irradiate light onto the display element of the image, thereby generating an image, and then projecting it through a lens so that the projection picture is projected onto a screen or a wall. In the process of using the projection device, it is often necessary to adjust the projection angle of the projection device according to the different positions of the viewer so that the viewer has a comfortable viewing posture. An embodiment of the present application provides a projection device, which can adjust the projection angle through the projection device itself, and in the process of adjusting the projection angle, it can also achieve linkage with other functional parts in the projection device.

[0033] Reference Figure 1 , Figure 2 and Figure 3 , Figure 1 A partial structural diagram of the projection device provided for this application, Figure 2 A partial exploded view of the projection device provided for this application, Figure 3A partial cross-sectional view of the projection device provided by the present application. The projection device provided by the embodiment of the present application includes: a base 1, a bracket 2, a projection host 3 and a lifting member 4, wherein the base 1 includes a base 11 and a cover 12 that are rotatably connected; the bracket 2 is arranged on the cover 12, and the bracket 2 can rotate relative to the base 11 under the drive of the cover 12; the projection host 3 is rotatably connected to the bracket 2 and is located on a side of the cover 12 away from the base 11, and the projection host 3 can rotate relative to the bracket 2, and the projection host 3 is used to generate a projection image; the lifting member 4 is movably arranged on the cover 12, and a driving component 5 is arranged between the projection host 3 and the lifting member 4; when the projection host 3 rotates relative to the bracket 2 and / or rotates under the drive of the cover 12, the lifting member 4 can move relative to the cover 12 under the action of the driving component 5.

[0034] The base 1 in the embodiment of the present application may be a part that supports and bears other parts in the projection device. The base 1 may be configured to include a base 11 and a cover 12, and the cover 12 is rotatably connected to the base 11. Figure 2 As shown, a rotating mechanism 8 may be provided between the base 11 and the cover 12, and the cover 12 may be driven to rotate relative to the base 11 by the rotating mechanism 8. A receiving cavity 13 may also be provided on the cover 12 and the base 11 to accommodate some parts in the cover 12 and the base 11. A fixing structure may also be provided on the base 11, and the base 11 may be fixed at an installation position, such as a wall, a desktop, etc., by the fixing structure, so as to fix the projection device at the installation position.

[0035] The bracket 2 in the embodiment of the present application may be a part that supports and connects, and the projection host 3 may be set on the base 1 through the bracket 2. The bracket 2 may be set in a rod-shaped structure; the bracket 2 may be extended from the cover 12 and formed integrally with the cover 12; or it may be manufactured separately and then fixedly connected to the cover 12.

[0036] The projection host 3 in the embodiment of the present application is used to generate a projection image, and the projection host 3 includes a host housing 31, and parts such as an optical machine component and a lens component arranged in the host housing 31. The projection host 3 is rotatably connected to the bracket 2, and the cover 12 is located between the projection host 3 and the base 11. The projection host 3 can be rotated relative to the bracket 2 to adjust the projection angle of the projection host 3.

[0037] The lifting member 4 in the embodiment of the present application can be arranged in the accommodating cavity 13 on the cover body 12 in the base 1, or can be arranged outside the cover body 12, and the lifting member 4 is movably connected to the cover body 12 so that the lifting member 4 can move relative to the cover body 12. The lifting member 4 can be other functional parts or items such as lamps, speakers or dolls. A driving component 5 can be arranged between the projection host 3 and the lifting member 4, and the driving component 5 can be a magnetic component or an electric lifting component. In this way, during the rotation of the projection host 3 relative to the bracket 2, the lifting member 4 can be moved relative to the cover body 12 under the action of the driving component 5. For example, the lifting member 4 is extended from the accommodating cavity 13 on the cover body 12 or retracted into the accommodating cavity 13.

[0038] The projection device provided in the embodiment of the present application is provided with a base 1 including a base 11 and a cover 12 which are rotatably connected, so that the base 1 can provide support for the projection device, and the projection device can be fixed at the installation position through the base 11; and a bracket 2 is provided on the cover 12, so that the projection host 3 can be easily connected to the base 1 through the bracket 2; and the projection host 3 is rotatably connected to the bracket 2, so that the projection host 3 can rotate relative to the bracket 2, so that the pitch angle of the projection host 3 can be adjusted, and the cover 12 can be rotated relative to the base 11, so that the bracket 2 drives the projection host 3 to rotate, so that the projection host 3 can rotate relative to the base 11, so that the projection angle can be adjusted within a larger range. At the same time, a lifting member 4 is movably provided on the cover 12, and a driving assembly 5 is provided between the projection host 3 and the lifting member 4, so that the lifting member 4 can move relative to the cover 12 through the action of the driving assembly 5 while the projection angle is adjusted to make the projection host 3 move, so that the lifting member 4 as a functional member in the projection device can be linked with the projection host 3, so that the projection device has more application functions.

[0039] Compared with the related art, in which the projection angle of the projection host 3 is adjusted by means of an external support frame, the projection device of the embodiment of the present application rotatably connects the cover 12 and the base 11, and rotatably connects the projection host 3 and the bracket 2 disposed on the cover 12, and the projection angle can be adjusted by the structure of the projection device itself. Therefore, the projection device provided by the embodiment of the present application can realize the linkage with the functional parts in the projection device while adjusting the projection angle by the projection device itself.

[0040] In some possible implementations, the driving assembly 5 disposed between the projection host 3 and the lifting member 4 in the embodiment of the present application may be a structure including a first magnetic member 51 and a second magnetic member 52. Figure 3As shown, a first magnetic component 51 can be fixedly set on the lifting component 4, and a second magnetic component 52 corresponding to the first magnetic component 51 can be fixedly set on the projection host 3; wherein, during the rotation of the projection host 3 relative to the bracket 2, under the action of the magnetic attraction of the first magnetic component 51 and the second magnetic component 52, the lifting component 4 can move in a direction away from the base 11.

[0041] For example, refer to Figure 4 , Figure 4 FIG. 1 is a top view of the base 1 and the lifting member 4 in the projection device provided in this application. Figure 3 and Figure 4 As shown, a second magnetic member 52 can be provided on one end of the projection host 3 close to the cover 12; correspondingly, a first magnetic member 51 can be provided on one side of the lifting member 4 close to the projection host 3. For example, two second magnetic members 52 can be evenly provided on the projection host 3 along the circumferential direction of the projection host 3, and correspondingly, two first magnetic members 51 can also be provided on the lifting member 4. Other numbers of second magnetic members 52 and first magnetic members 51, such as three, four or five, can also be provided respectively. Among them, the first magnetic member 51 and the second magnetic member 52 can both be permanent magnets, for example, both can be metal alloy magnets, such as neodymium iron boron magnets, samarium cobalt magnets, aluminum nickel cobalt magnets, etc., or ferrite permanent magnets can also be used; one of the first magnetic member 51 and the second magnetic member 52 can be a permanent magnet, and the other can be a magnetic conductive member, which can be an iron block, a steel block, etc.; the first magnetic member 51 and the second magnetic member 52 can also both be electromagnetic members, or one can be an electromagnetic member and the other can be a permanent magnet or a magnetic conductive member. The embodiment of the present application does not limit the specific forms of the first magnetic member 51 and the second magnetic member 52 .

[0042] In another example, in order to facilitate fixing the second magnetic member 52, as shown in FIG. Figure 3 As shown, a fixing seat 53 can be provided on the shell of the projection host 3, and a fixing groove adapted to the shape of the second magnetic component 52 can be provided on the fixing seat 53 to accommodate the second magnetic component 52 in the fixing groove, and the second magnetic component 52 can be fixed to the shell of the projection host 3 through the fixing seat 53.

[0043] Another example, such as Figure 4 As shown, the accommodating cavity 13 on the cover body 12 can be set as a circular cavity, and correspondingly, the lifting member 4 can be set as a cylindrical shape, so that the lifting member 4 can be accommodated in the accommodating cavity 13. A guide structure can be provided between the circumferential side surface of the lifting member 4 and the cavity wall of the accommodating cavity 13, so as to limit the movement path of the lifting member 4 in the accommodating cavity 13 through the guide structure.

[0044] For example, a plurality of guide protrusions 41 may be provided on the circumferential side wall of the lifting member 4, and correspondingly, a guide groove 121 adapted to each guide protrusion 41 may be provided on the cavity wall of the accommodating cavity 13, and the guide groove 121 may be formed extending along the axial direction of the cover body 12. The guide protrusions 41 may also be provided on the cavity wall of the accommodating cavity 13, and the guide grooves 121 may be provided on the circumferential side wall of the lifting member 4. The embodiment of the present application is not limited to this. In this way, the lifting member 4 may be moved relative to the cover body 12 along a defined path through the guide structure, that is, the lifting member 4 may be moved along the axial direction of the cover body 12.

[0045] In another example, a vibration reduction member may be provided on the guide protrusion 41 along the axial direction of the lifting member 4, for example, a flexible member such as foam, silicone or sponge may be bonded to the guide protrusion 41. In this way, when the lifting member 4 moves relative to the cover body 12, the collision sound generated between the lifting member 4 and the cover body 12 can be reduced.

[0046] In some other possible implementations, the relationship between the distances between the first magnetic component 51 and the second magnetic component 52 and the electromagnetic device in the projection equipment is: H1×L1×b1<Hmin, where H1 represents the magnetic field strength of the first magnetic component 51, L1 represents the distance between the first magnetic component 51 and the electromagnetic device, Hmin represents the minimum magnetic field strength when the electromagnetic device is affected by the magnetic field, and b1 is a constant; H2×L2×b2<Hmin, where H2 represents the magnetic field strength of the second magnetic component 52, L2 represents the distance between the second magnetic component 52 and the electromagnetic device, Hmin represents the minimum magnetic field strength when the electromagnetic device is affected by the magnetic field, and b2 is a constant.

[0047] For example, since the driving assembly 5 uses a magnetic component, and the projection device generally has other electromagnetic components, in order to reduce the influence of other electromagnetic components in the projection device on the magnetic component in the driving assembly 5, the first magnetic component 51 and the second magnetic component 52 can be kept at a certain distance from the other electromagnetic components in the projection device.

[0048] For example, the distance between the first magnetic member 51 and the electromagnetic device can be determined according to formula (1).

[0049] H1×L1×b1<Hmin formula (1);

[0050] The distance between the second magnetic member 52 and the electromagnetic device can be determined according to formula (2):

[0051] H2×L2×b2<Hmin formula (2).

[0052] According to formula (1) and formula (2), when the magnetic field strength of the first magnetic component 51, the magnetic field strength of the second magnetic component 52 and the minimum magnetic field strength of the electromagnetic device affected by the magnetic field are determined, the distance between the first magnetic component 51 and the electromagnetic device and the distance between the second magnetic component 52 and the electromagnetic device can be adjusted so that the first magnetic component 51 and the second magnetic component 52 do not interfere with each other with the electromagnetic device. The first minimum distance between the first magnetic component 51 and the electromagnetic device can be determined according to formula (1) to set the distance between the first magnetic component 51 and the electromagnetic device to be greater than or equal to the first minimum distance that will cause magnetic interference between the two; the second minimum distance between the second magnetic component 52 and the electromagnetic device can be determined according to formula (2) to set the distance between the second magnetic component 52 and the electromagnetic device to be greater than or equal to the second minimum distance that will cause magnetic interference between the two. b1 and b2 are influence coefficients. By adjusting the values ​​of b1 and b2, the magnitude of the influence between the first magnetic component 51, the second magnetic component 52 and the electromagnetic device can be adjusted respectively. The values ​​of b1 and b2 are less than 1 and greater than 0.

[0053] In some other possible implementations, under the action of the magnetic attraction between the first magnetic member 51 and the second magnetic member 52, in the process of enabling the lifting member 4 to move in a direction away from the base 11, the relationship between the magnetic attraction between the first magnetic member 51 and the second magnetic member 52 and the gravity of the lifting member 4 is as follows:

[0054] F1×B1×a1>G+f, wherein F1 represents the magnetic attraction between the first magnetic member 51 and the second magnetic member 52, B1 represents the distance between the first magnetic member 51 and the second magnetic member 52, G represents the gravity of the lifting member 4, f represents the friction between the lifting member 4 and the substrate 1, and a1 is a constant.

[0055] For example, as the distance between the two magnetic parts decreases, the magnetic attraction between the two magnetic parts also increases. When the distance between the two magnetic parts is the shortest, the magnetic attraction between the two magnetic parts reaches a maximum value. When the lifting member 4 moves away from the base 11, it needs to overcome gravity and friction, and the power of the lifting member 4 comes from the magnetic attraction between the first magnetic member 51 and the second magnetic member 52. The magnitude of the magnetic attraction between the first magnetic member 51 and the second magnetic member 52 can be determined according to formula (3) to determine the magnetic member to be used.

[0056] F1×B1×a1>G+f Formula (3);

[0057] According to formula (3), when the gravity G of the lifting member 4, the friction force f between the lifting member 4 and the base 11, and the distance B1 between the first magnetic member 51 and the second magnetic member 52 are determined, the minimum value of the magnetic attraction force between the first magnetic member 51 and the second magnetic member 52 can be determined. The materials and magnetic field strength of the first magnetic member 51 and the second magnetic member 52 selected can also be determined based on the minimum value. a1 is the response coefficient between the first magnetic member 51 and the second magnetic member 52. By adjusting a1, the magnitude of the magnetic attraction force F1 between the first magnetic member 51 and the second magnetic member 52 can be adjusted to adjust the speed of the movement of the lifting member 4. The value of a1 is less than 1 and greater than 0.

[0058] As another example, when the lifting member 4 needs to be moved toward the base 11 (the process of descending), the friction force f between the lifting member 4 and the base 11 becomes a force that hinders the lifting member 4 from descending. According to formula (4), it can be determined to what extent the distance between the first magnetic member 51 and the second magnetic member 52 will increase before the lifting member 4 will descend.

[0059] F2×B2×a2+f<G Formula (4);

[0060] In the formula, F2 represents the magnetic attraction between the first magnetic member 51 and the second magnetic member 52, B2 represents the distance between the first magnetic member 51 and the second magnetic member 52, G represents the gravity of the lifting member 4, f represents the friction between the lifting member 4 and the base 1, and a2 is a constant.

[0061] According to formula (4), as the distance B2 between the first magnetic member 51 and the second magnetic member 52 increases, the magnetic attraction F2 between the first magnetic member 51 and the second magnetic member 52 will decrease. When the sum of the magnetic attraction F2 and the friction f between the first magnetic member 51 and the second magnetic member 52 is less than the gravity G of the lifting member 4, the lifting member 4 will automatically descend. Therefore, when selecting the first magnetic member 51 and the second magnetic member 52, the first magnetic member 51 and the second magnetic member 52 with too large magnetic attraction cannot be selected. Otherwise, even if the projection host 3 drives the second magnetic member 52 to rotate to a farther position relative to the first magnetic member 51, the lifting member 4 cannot descend and return to the accommodating cavity 13 on the cover body 12 because the magnetic attraction between the first magnetic member 51 and the second magnetic member 52 is too large.

[0062] In some achievable embodiments, an avoidance groove 42 is provided on the side of the lifting member 4 close to the projection host 3; the maximum rotation radius R of the projection host 3 around the bracket 2, the distance A between the lifting member 4 and the rotating shaft 61 of the projection host 3 when the lifting member 4 is located away from the base 11, and the distance D between the avoidance groove 42 and the projection host 3 when the lifting member 4 is located close to the base 11, the relationship among the three is: A+D≥R.

[0063] For example, Figure 3 As shown, since the projection host 3 rotates around the bracket 2, the distance between different parts of the projection host 3 and the lifting member 4 will change during the rotation of the projection host 3. When the outermost circumferential edge of the bottom of the projection host 3 close to the lifting member 4 moves to a position close to the center of the lifting member 4, the projection host 3 is closest to the lifting member 4. In order to prevent the projection host 3 from colliding with the lifting member 4 during the rotation of the bracket 2, an avoidance groove 42 can be provided on the lifting member 4, and the avoidance groove 42 can be provided as a spherical groove. Then, during the rotation of the projection host 3 around the bracket 2, the distance between the outermost circumferential edge of the projection host 3 and the spherical groove can be kept consistent or nearly consistent, and no collision will occur.

[0064] The depth of the avoidance groove 42 on the lifting member 4 can be determined according to formula (5).

[0065] A+D≥R formula (5);

[0066] According to formula (5), the maximum rotation radius R of the projection host 3 rotating around the bracket 2 is the distance from the outermost circumferential edge of the projection host 3 near the bottom of the lifting member 4 to the center of the rotation axis of the projection host 3; when the lifting member 4 is located at a position far from the base 11, the distance A between the lifting member 4 and the rotation axis of the projection host 3 is the minimum distance between the lifting member 4 and the projection host 3 when the lifting member 4 rises to the position close to the projection host 3, and the minimum distance can be the minimum distance between the bottom of the projection host 3 and the rotation axis of the projection host 3; when the lifting member 4 is located at a position close to the base 11, the distance D between the avoidance groove 42 and the projection host 3 is the distance between the bottom of the avoidance groove 42 and the bottom of the projection host 3 after the lifting member 4 descends and retreats to the accommodating cavity 13 on the cover 12. Then R and A can be obtained by measuring the size of the projection host 3, and according to the measured values ​​of R and A, the value of D can be determined, and thus the depth of the avoidance groove 42 can be determined.

[0067] In some possible implementations, refer to Figure 5 and Figure 6 , Figure 5 A cross-sectional view of a rotating shaft mechanism in a projection device provided in the present application. Figure 6 Provided for this application Figure 5 A partial enlarged view of the M part in the figure. In order to manually adjust the projection angle of the projection host 3, the projection host 3 can be rotatably connected to the bracket 2 through a rotating shaft mechanism 6. The rotating shaft mechanism 6 can be configured to include: a rotating shaft 61, a first rotating member 62, and a second rotating member 63. Among them, a convex ring 611 is extended and formed on the rotating shaft 61 in the radial direction of the rotating shaft 61; the first rotating member 62 is fixedly connected to the bracket 2, and the first rotating member 62 is sleeved on one end of the rotating shaft 61, and slides against one side of the convex ring 611, and can rotate relative to the convex ring 611; the second rotating member 63 is fixedly connected to the projection host 3, and the second rotating member 63 is sleeved on one end of the rotating shaft 61 away from the first rotating member 62, and slides against the side of the convex ring 611 away from the first rotating member 62, and can rotate relative to the convex ring 611.

[0068] For example, the rotating shaft 61 can be set as a cylindrical structure, and on the cylindrical rotating shaft 61, along the radial direction thereof, a convex ring 611 is extended from the circumferential side surface of the rotating shaft 61. The first rotating member 62 can be set as a disc-shaped structure adapted to the bracket shaft 21 on the bracket 2, and a through hole is provided on the first rotating member 62, so that the first rotating member 62 is sleeved on one side of the convex ring 611 on the rotating shaft 61, and the first rotating member 62 is abutted against the convex ring 611.

[0069] The second rotating member 63 can be configured to have a cavity structure, that is, the second rotating member 63 can be formed by enclosing at least two rotating plates, and a cavity is formed between the two rotating plates. One rotating plate of the second rotating member 63 is sleeved on the other end of the rotating shaft 61, and the rotating plate is abutted against the convex ring 611, so that the first rotating member 62 and the second rotating member 63 are respectively located on both sides of the convex ring 611, and one end of the second rotating member 63 arranged on the rotating shaft 61 is located in the cavity of the second rotating member 63. The other rotating plate of the second rotating member 63 is fixedly connected to the main body housing 31 of the projection host 3, so that the projection host 3 and the bracket 2 can be rotatably connected through the rotating shaft mechanism 6. By adjusting the friction between the first rotating member 62 and the convex ring 611, and adjusting the friction between the second rotating member 63 and the convex ring 611, the projection host 3 can be suspended at any rotation angle relative to the bracket 2 after manually adjusting the rotation angle of the projection host 3 relative to the bracket 2.

[0070] In some practicable ways, in order to automatically adjust the rotation angle of the projection host 3 relative to the bracket 2, such as Figure 5 and Figure 6As shown, a driving member and a transmission member can be provided in the rotating shaft mechanism 6. Then the rotating shaft mechanism 6 also includes a first driving member (not shown in the figure) and a first transmission member 64; the first driving member is fixed on the second rotating member 63, the first transmission member 64 is fixedly connected to the rotating shaft 61, and is in transmission connection with the first driving member; under the drive of the first driving member, the first transmission member 64 drives the rotating shaft 61 to rotate relative to the first rotating member 62 or the second rotating member 63, so that the projection host 3 rotates relative to the bracket 2.

[0071] For example, the first driving member can be a servo motor, a stepper motor or a common motor, and the first driving member can be fixed on a rotating plate on the second rotating member 63 away from the first rotating member 62. The first transmission member 64 can be a first gear, which is fixed on the rotating shaft 61 and located in a cavity on the second rotating member 63. A second gear can be provided on the output shaft of the first driving member, and the first gear and the second gear are meshed, so that the first driving member can drive the rotating shaft 61 to rotate relative to the second rotating member 63 through gear transmission.

[0072] It should be noted that the first transmission member 64 may also be a sprocket and a chain, or other transmission members such as a pulley and a belt, and the embodiment of the present application is not limited to this.

[0073] In some possible implementations, in order to adjust the friction between the first rotating member 62 and the second rotating member 63 and the convex ring 611 on the rotating shaft 61, respectively, to adjust the torque between the first rotating member 62 and the rotating shaft 61, and to adjust the torque between the second rotating member 63 and the rotating shaft 61. Figure 5 and Figure 6 As shown, an elastic component can also be provided on the rotating shaft mechanism 6. Then the rotating shaft mechanism 6 can be set to a structural form that also includes a first elastic component 65 and a second elastic component 66, wherein the first elastic component 65 is sleeved on the rotating shaft 61 and abuts against the first rotating member 62, and the first elastic component 65 can adjust the pressing force between the first rotating member 62 and the convex ring 611 to adjust the friction between the first rotating member 62 and the convex ring 611; the second elastic component 66 is sleeved on the rotating shaft 61 and abuts against the second rotating member 63, and the second elastic component 66 can adjust the pressing force between the second rotating member 63 and the convex ring 611 to adjust the friction between the second rotating member 63 and the convex ring 611.

[0074] For example, the first elastic component 65 can be set to a structural form including a first disc spring 651 and a second disc spring 652. The first disc spring 651 and the second disc spring 652 can be overlapped and sleeved on one end of the first rotating member 62 on the rotating shaft 61, and the second disc spring 652 and the first rotating member 62 are abutted. In order to facilitate the adjustment of the deformation of the first disc spring 651 and the second disc spring 652, a first fastener 67 can be set at one end of the rotating shaft 61 where the first rotating member 62 is set, and the deformation of the first elastic component 65 can be adjusted by adjusting the position of the first fastener 67 on the rotating shaft 61. For example, an external thread is set at one end of the rotating shaft 61 where the first rotating member 62 is set, and correspondingly, a first nut as the first fastener 67 adapted to the external thread is set. Therefore, the deformation of the first disc spring 651 and the second disc spring 652 can be adjusted by adjusting the position of the first nut on the rotating shaft 61, so as to adjust the torque between the first rotating member 62 and the convex ring 611.

[0075] In another example, a friction plate 69 may be provided between the second disc spring 652 and the first rotating member 62, and a friction plate 69 may also be provided between the first fastener 67 and the first disc spring 651. The friction plate 69 may be made of materials such as rubber, silicone or plastic. By providing the friction plate 69, the wear of the first rotating member 62 and the second disc spring 652 may be reduced during the rotation of the first rotating member 62 relative to the rotating shaft 61; and the wear of the first fastener 67 and the first disc spring 651 may be reduced during the rotation of the first fastener 67 relative to the first disc spring 651.

[0076] Another example, such as Figure 6 As shown, the second elastic component 66 can be set to a structural form including a third disc spring 661 and a fourth disc spring 662. The third disc spring 661 and the fourth disc spring 662 can be overlapped and sleeved on one end of the second rotating member 63 on the rotating shaft 61, and the third disc spring 661 and the first transmission member 64 are abutted. In order to facilitate the adjustment of the deformation of the third disc spring 661 and the fourth disc spring 662, a second fastener 68 can be set at one end of the rotating shaft 61 where the second rotating member 63 is set, and the deformation of the second elastic component 66 can be adjusted by adjusting the position of the second fastener 68 on the rotating shaft 61. For example, an external thread is set at one end of the rotating shaft 61 where the second rotating member 63 is set, and correspondingly, a second nut as the second fastener 68 adapted to the external thread is set. Therefore, the deformation of the third disc spring 661 and the fourth disc spring 662 can be adjusted by adjusting the position of the second nut on the rotating shaft 61, so as to adjust the torque between the second rotating member 63 and the convex ring 611.

[0077] In another example, a friction plate 69 may be provided between the first transmission member 64 and the connecting plate in the first rotating member 62 that abuts against the convex ring 611, and a friction plate 69 may also be provided between the second fastener 68 and the fourth disc spring 662. By providing the friction plate 69, the wear of the connecting plate in the second rotating member 63 that abuts against the convex ring 611 and the first transmission member 64 may be reduced during the rotation of the second rotating member 63 relative to the rotating shaft 61; and the wear of the second fastener 68 and the fourth disc spring 662 may be reduced during the rotation of the second fastener 68 relative to the fourth disc spring 662.

[0078] It should be noted that the first elastic component 65 and the second elastic component 66 may both be other elastic members. For example, the first elastic component 65 and the second elastic component 66 may also be elastic members such as compression springs and spring washers.

[0079] When the projection angle of the projection host 3 needs to be adjusted manually, the projection host 3 can be moved. At this time, the second rotating member 63 is fixedly connected to the projection host 3, and the projection host 3 drives the second rotating member 63 to rotate together. When the second rotating member 63 rotates, the second elastic component 66 makes the second rotating member 63 and the convex ring 611 of the rotating shaft 61 have a first friction force, so the second rotating member 63 drives the rotating shaft 61 to rotate. The first rotating member 62 is fixedly connected to the bracket 2, and the first rotating member 62 and the convex ring 611 of the rotating shaft 61 have a second friction force under the action of the first elastic component 65. It is only necessary to set the second friction force to be smaller than the first friction force and to set the second friction force to be larger than the maximum torque generated after the projection host 3 is rotated (after the projection host 3 is rotated, the projection host 3 generates torque under the action of gravity), so that the second rotating member 63 can drive the rotating shaft 61 to rotate relative to the first rotating member 62, so that the projection angle of the projection host 3 can be manually adjusted, and the projection host 3 can be suspended at any rotation angle relative to the bracket 2.

[0080] In the case where the projection angle of the projection host 3 needs to be automatically adjusted, a control signal can be sent to the first driving member, so that the first driving member applies a rotational torque to the rotating shaft 61 through the transmission member. At this time, the rotating shaft 61 does not rotate relative to the first rotating member 62, but the second rotating member 63 and the first driving member rotate together around the rotating shaft 61, so that the projection host 3 can rotate relative to the bracket 2. In this process, the rotational torque generated by the first driving member needs to overcome the first friction force and the torque formed after the projection host 3 rotates. After the first driving member stops working, under the action of the first friction force and the second friction force, the projection host 3 can have a certain rotation angle relative to the bracket 2 and hover, so that the projection angle of the projection host 3 can be automatically adjusted.

[0081] In some possible ways, such as Figure 2 As shown, the base 11 and the cover 12 are rotatably connected via a rotating mechanism 8, and the cover 12 can rotate relative to the base 11 under the drive of the rotating mechanism 8. The rotating mechanism 8 can be configured to include a second driving member, a fourth transmission member, and a fifth transmission member.

[0082] Exemplarily, the second driving member can be an electric motor, and the second driving member can be fixed in the cover body 12. The fourth transmission member can be a fourth gear, and the fourth gear is fixed on the output shaft of the motor. The fifth transmission member can be a fifth gear ring, and the fifth gear ring is fixed in the base 11, so that the fourth gear and the fifth gear ring are meshed. Then, under the drive of the second driving member, the fourth gear can be driven to rotate relative to the fifth gear ring, so as to drive the cover body 12 to rotate relative to the base 11. In this way, the cover body 12 can be automatically rotated relative to the base 11, so as to drive the projection host 3 to rotate relative to the base 11 through the bracket 2.

[0083] In another example, the rotating mechanism 8 may also be in the form of a rotating shaft and a rotating piece. For example, the rotating shaft is fixed on the base 11, the rotating piece is fixed on the cover 12, and the rotating piece is sleeved on the rotating shaft so that the rotating piece and the rotating shaft are rotatably connected. Thus, the cover 12 can be manually rotated to drive the projection host 3 to rotate relative to the base 11.

[0084] In another example, the rotating mechanism 8 may also adopt the rotating shaft mechanism 6 provided in the above embodiment, so as to achieve the purpose that the cover 12 can be rotated manually or automatically relative to the base 11.

[0085] In some other possible implementations, refer to Figure 7 , Figure 7 This is a cross-sectional view of the angle measurement component in the projection device provided by the present application. An angle measurement component 7 may also be provided in the projection device to control the rotation angle of the projection host 3 relative to the bracket 2. The angle measurement component 7 is provided between the bracket 2 and the projection host 3 and is electrically connected to the first driving member. The angle measurement component 7 is used to measure the rotation angle of the projection host 3 relative to the bracket 2, and can send a control signal to the first driving member according to the rotation angle.

[0086] Exemplarily, the angle measurement component 7 can be set to a structural form including a Hall element 71 and a third magnetic member 72. For example, the Hall element 71 is fixed on the host housing 31 of the projection host 3, and the third magnetic member 72 is fixed on the bracket 2. Then, during the rotation of the projection host 3 relative to the bracket 2, the Hall element 71 can generate an output signal according to the change in the magnetic field caused by the rotation of the third magnetic member 72, so that the value of the rotation angle of the projection host 3 relative to the bracket 2 can be obtained in real time. The Hall element 71 can be electrically connected to the first driving member in the shaft mechanism 6, and the range value of the preset rotation angle of the projection host 3 can be set. When the real-time rotation angle of the projection host 3 measured by the Hall element 71 exceeds the preset rotation angle, a control signal can be sent to the first driving member to stop the first driving member from working, so that the projection host 3 can always rotate within the preset rotation angle range.

[0087] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A projection device, characterized in that: include: A base (1) comprising a rotatably connected base (11) and a cover (12); A bracket (2) is arranged on the cover body (12), and driven by the cover body (12), the bracket (2) can rotate relative to the base (11); A projection host (3) is rotatably connected to the bracket (2) and is located on a side of the cover (12) away from the base (11); the projection host (3) is rotatable relative to the bracket (2) to generate a projection image; A lifting member (4) is movably arranged on the cover body (12), and a driving component (5) is arranged between the projection host (3) and the lifting member (4); Wherein, during the process of the projection host (3) rotating relative to the bracket (2), under the action of the driving component (5), the lifting member (4) can move relative to the cover body (12).

2. The projection device according to claim 1, characterized in that: The driving assembly (5) comprises a first magnetic component (51) and a second magnetic component (52); wherein the first magnetic component (51) is fixed on the lifting component (4), and the second magnetic component (52) is fixed on the projection host (3) at a position corresponding to the first magnetic component (51).

3. The projection device according to claim 2, characterized in that: The relationship between the distances between the first magnetic member (51) and the second magnetic member (52) and the electromagnetic device in the projection device is: H1×L1×b1<H min , where H1 represents the magnetic field strength of the first magnetic component (51), L1 represents the distance between the first magnetic component (51) and the electromagnetic device, and H min represents the minimum magnetic field strength of the electromagnetic device affected by the magnetic field, and b1 is a constant; H2×L2×b2<H min , where H2 represents the magnetic field strength of the second magnetic member (52), L2 represents the distance between the second magnetic member (52) and the electromagnetic device, and H min represents the minimum magnetic field strength of the electromagnetic device affected by the magnetic field, and b2 is a constant.

4. The projection device according to claim 2, characterized in that: In the process of causing the lifting member (4) to move in a direction away from the base (11) under the action of the magnetic attraction force between the first magnetic member (51) and the second magnetic member (52), the relationship between the magnetic attraction force between the first magnetic member (51) and the second magnetic member (52) and the gravity of the lifting member (4) is as follows: F1×B1×a1>G+f, wherein F1 represents the magnetic attraction force between the first magnetic member (51) and the second magnetic member (52), B1 represents the distance between the first magnetic member (51) and the second magnetic member (52), G represents the gravity of the lifting member (4), f represents the friction force between the lifting member (4) and the base (1), and a1 is a constant.

5. The projection device according to any one of claims 1 to 4, characterized in that: A side of the lifting member (4) close to the projection host (3) is provided with an avoidance groove (42); The relationship between the maximum rotation radius R of the projection host (3) rotating around the bracket (2), the distance A between the lifting member (4) and the rotation axis of the projection host (3) when the lifting member (4) is located away from the base (11), and the distance D between the avoidance groove (42) and the projection host (3) when the lifting member (4) is located close to the base (11) is: A+D≥R.

6. The projection device according to any one of claims 1 to 4, characterized in that: The projection host (3) and the bracket (2) are rotatably connected via a rotating shaft mechanism (6); The rotating shaft mechanism (6) comprises: The rotating shaft (61) is extended in the radial direction to form a convex ring (611); A first rotating member (62) is fixedly connected to the bracket (2); the first rotating member (62) is sleeved on one end of the rotating shaft (61) and is slidably abutted against one side of the convex ring (611) so as to be rotatable relative to the convex ring (611); The second rotating member (63) is fixedly connected to the projection host (3). The second rotating member (63) is sleeved on one end of the rotating shaft (61) away from the first rotating member (62), and is slidably abutted against a side of the convex ring (611) away from the first rotating member (62), and can rotate relative to the convex ring (611).

7. The projection device according to claim 6, characterized in that: The rotating shaft mechanism (6) further comprises a first driving member and a first transmission member (64); the first driving member is fixed on the second rotating member (63), the first transmission member (64) is fixedly connected to the rotating shaft (61) and is transmission-connected to the first driving member; Under the drive of the first driving member, the first transmission member (64) drives the rotating shaft (61) to rotate relative to the first rotating member (62) or the second rotating member (63), so that the projection host (2) rotates relative to the bracket (2).

8. The projection device according to claim 6, characterized in that: The rotating shaft mechanism (6) further comprises a first elastic component (65) and a second elastic component (66); The first elastic component (65) is sleeved on the rotating shaft (61) and abuts against the first rotating member (62). The first elastic component (65) can adjust the pressing force between the first rotating member (62) and the convex ring (611) so as to adjust the friction force between the first rotating member (62) and the convex ring (611); The second elastic component (66) is sleeved on the rotating shaft (61) and abuts against the second rotating member (63). The second elastic component (66) can adjust the pressing force between the second rotating member (63) and the convex ring (611) to adjust the friction force between the second rotating member (63) and the convex ring (611).

9. The projection device according to claim 7, characterized in that: The invention also comprises an angle measuring component (7), which is arranged between the bracket (2) and the projection host (3) and is electrically connected to the first driving member. The angle measuring component (7) is used to measure the rotation angle of the projection host (3) relative to the bracket (2), and can send a control signal to the first driving member according to the rotation angle.

10. The projection device according to any one of claims 1 to 4, characterized in that: The base (11) and the cover body (12) are rotatably connected via a rotating mechanism (8); under the drive of the rotating mechanism (8), the cover body (12) can rotate relative to the base (11).

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