Screen lifting device and laser TV

Abstract

The present application discloses a screen lifting device and a laser television, belonging to the field of imaging technology. The screen lifting device includes a base and a first driving component and a lifting component located on the base; the lifting component includes at least one telescopic tube, each telescopic tube is installed on the base and one end thereof is connected to one side of the screen; the first driving component is connected to each telescopic tube and is used to drive the telescopic tube to extend or contract so as to drive the screen to rise or fall. The problem of poor stability of the screen in the related art is solved, and the effect of improving the stability of the screen is achieved.

Description

Technical Field

[0001] This application relates to the field of imaging technologies, and particularly to a screen lifting device and a laser TV. Background Art

[0002] A projection device is a device that can project an image screen onto a screen. To improve the portability of the screen, some projection devices are equipped with a lifting device that can lift the screen.

[0003] A screen lifting device in the related art includes a roller and a motor. The screen is wound around the roller. When the screen is in use, the roller is driven to rotate by the motor, and the screen is released from the roller and hangs down. The projection device can project an image beam onto the screen; when the screen is not in use, the roller is driven to rotate in the reverse direction by the motor, and the screen is re-wound into the roller to complete the storage of the screen.

[0004] In the screen lifting device in the above related art, during the working process of the projection device, the stability of the screen is poor. Summary of the Invention

[0005] Embodiments of this application provide a screen lifting device and a laser TV. The technical solutions are as follows:

[0006] According to a first aspect of this application, a screen lifting device is provided. The screen lifting device includes a base and a first driving component and a lifting component located on the base;

[0007] The lifting component includes at least one telescopic tube. Each telescopic tube is installed on the base and one end is connected to one side of the screen;

[0008] The first driving component is connected to each telescopic tube and is used to drive the telescopic tube to extend or contract, so as to drive the screen to rise or fall;

[0009] The telescopic tube includes: at least two lifting tubes nested in sequence from the outside to the inside and an elastic force component. The outer diameters of the at least two lifting tubes gradually decrease from the outside to the inside; each of the at least two lifting tubes further includes: a guiding groove and a guiding post. The guiding groove is located on the outer wall of the lifting tube and the extending direction is parallel to the length direction of the lifting tube. The guiding post is located on the inner wall of the lifting tube and the extending direction is parallel to the length direction of the lifting tube. Among the at least two lifting tubes, the guiding post of the first lifting tube is assembled in the guiding groove of the second lifting tube;

[0010] The lifting pipe further has a limiting hole and a one-way limiting claw. When the second lifting pipe moves into the first lifting pipe along the first direction under the guidance of the guiding groove and the guiding column to the first position, the one-way limiting claw of the second lifting pipe snaps into the limiting hole of the first lifting pipe and prevents the second lifting pipe from continuing to move along the first direction. When the second lifting pipe moves in the opposite direction of the first direction under the guidance of the guiding groove and the guiding column, the limiting claw of the second lifting pipe disengages from the limiting hole of the first lifting pipe.

[0011] Optionally, one end of the elastic component is connected to the central lifting pipe among the at least two lifting pipes, and the other end is connected to the first driving component, and is used for extending or shortening under the drive of the first driving component.

[0012] Optionally, the elastic component includes a compression spring and a connecting piece. The first end of the compression spring is connected to the central lifting pipe, the second end of the compression spring is connected to the base or the outermost lifting pipe among the at least two lifting pipes, the first end of the connecting piece is connected to the first end of the compression spring or the central lifting pipe, the second end of the connecting piece is connected to the first driving component, and the first driving component can pull the connecting piece to drive the compression spring to contract.

[0013] Optionally, the first lifting pipe and the second lifting pipe are two adjacent lifting pipes, and the outer diameter of the first lifting pipe is greater than the outer diameter of the second lifting pipe.

[0014] Optionally, both ends of each lifting pipe further have a lifting limiting structure. The lifting limiting structure at the end of the lifting pipe far from the base includes a first limiting protrusion located on the inner wall, and the lifting limiting structure at the end of the lifting pipe close to the base includes a second limiting protrusion located on the outer wall;

[0015] When the second lifting pipe moves out of the first lifting pipe in the opposite direction of the first direction under the guidance of the guiding groove and the guiding column to the second position, the second limiting protrusion of the second lifting pipe is blocked by the first limiting protrusion of the first lifting pipe.

[0016] Optionally, the first driving component includes a motor and a rotating shaft connected to the motor, and the rotating shaft is connected to the connecting piece.

[0017] Optionally, the first driving component further includes a gear and a gear conveyor belt. The rotating shaft passes through the center of the gear and is fixedly connected to the gear, and the gear conveyor belt is respectively meshed with the gear and the driving wheel of the motor.

[0018] According to another first aspect of the present application, a laser TV is provided, and the laser TV includes the screen lifting device described in the first aspect.

[0019] Optionally, the laser TV further includes a TV cabinet and a projection component;

[0020] The TV cabinet has an opening, the screen lifting device is located inside the TV cabinet, and the screen lifting device is used to lift the screen from the opening;

[0021] The projection component is connected to the outer surface of the TV cabinet.

[0022] The beneficial effects brought by the technical solutions provided in the embodiments of the present application at least include:

[0023] A screen lifting device including a driving component and a lifting component is provided, wherein the driving component can drive the telescopic tube in the lifting component to drive the screen to rise or fall while the telescopic tube extends or contracts. The telescopic tube can continuously support the screen when extending and contracting, making the screen relatively stable. The problem of poor stability of the screen in the related art is solved, and the effect of improving the stability of the screen is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is a schematic structural diagram of a screen lifting device provided by an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of a screen lifting device provided by an embodiment of the present application;

[0027] Figure 3 is a schematic structural diagram of the telescopic tube provided by an embodiment of the present application;

[0028] Figure 4 is a three-dimensional structural diagram of the telescopic tube provided by an embodiment of the present application;

[0029] Figure 5 is a schematic structural diagram of the elastic component provided by an embodiment of the present application;

[0030] Figure 6 is a partial structural diagram of the lifting tube provided by an embodiment of the present application;

[0031] Figure 7Schematic structural diagram of the one-way limit claw of the second lifting pipe being inserted into the limit hole of the first lifting pipe;

[0032] Figure 8 Partial structural schematic diagram of another telescopic pipe provided by an embodiment of the present application;

[0033] Figure 9 Schematic structural diagram of the downward limit claw and the downward limit hole being clamped;

[0034] Figure 10 Schematic structural diagram of the upward limit claw and the upward limit hole being clamped;

[0035] Figure 11 For Figure 8 Overall structural schematic diagram of the lifting pipe shown in;

[0036] Figure 12 Structural schematic diagram of another telescopic pipe provided by an embodiment of the present application;

[0037] Figure 13 Structural schematic diagram of the connection between the connecting piece and the rotating shaft provided by an embodiment of the present application;

[0038] Figure 14 Structural schematic diagram of a laser TV shown by an embodiment of the present application;

[0039] Figure 15 Is Figure 14 Three-dimensional structural schematic diagram of the other side of the laser TV shown in;

[0040] Figure 16 Is Figure 14 Schematic diagram of the state after the screen lifting device in the laser TV shown in descends.

[0041] Through the above-mentioned drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0042] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0043] Currently, the TV screen of a projection device in related technologies usually installs a fixing bracket on the wall to store the projection screen. The fixing bracket includes a motor and a roller. When a user watches the screen, the screen is released from the roller and hangs down. The projection device projects an image beam onto the screen to complete imaging. However, after the screen hangs down to a specified position, in order to facilitate the subsequent rising and re-winding of the screen into the roller for retraction, there is no device for fixing the screen below the screen. Under the influence of wind or other environments, the screen is prone to shaking, resulting in frequent occurrences such as unclear imaging or defocusing, thus leading to a poor viewing effect.

[0044] The embodiments of the present application provide a screen lifting device and a laser TV, which can solve the problems in the above-mentioned related technologies.

[0045] Figure 1 FIG. is a schematic structural diagram of a screen lifting device shown in the embodiments of the present application. The screen lifting device 10 may include:

[0046] The screen lifting device 10 includes a base 11 and a first driving component 12 and a lifting component 13 located on the base.

[0047] The lifting component 13 includes at least one telescopic tube (131, 132). Each telescopic tube (131, 132) is installed on the base 11 and one end is connected to one side of the screen 20.

[0048] The first driving component 12 is connected to each telescopic tube (131, 132) and is used to drive the telescopic tube (131, 132) to extend or shorten, so as to drive the screen 20 to rise or fall.

[0049] In summary, the embodiments of the present application provide a screen lifting device including a driving component and a lifting component. The driving component in it can drive the telescopic tube in the lifting component to extend or shorten while driving the screen to rise or fall. The telescopic tube can continuously support the screen when extending and shortening, making the screen relatively stable. It solves the problem of poor stability of the screen in related technologies and achieves the effect of improving the stability of the screen.

[0050] Please refer to Figure 2 , which shows a schematic structural diagram of another screen lifting device provided by the embodiments of the present application.

[0051] Optionally, the telescopic tube includes at least two lifting tubes 1311, 1312, and 1313 nested from outside to inside and an elastic component 14. The outer diameters of the at least two lifting tubes 1311, 1312, and 1313 gradually decrease from outside to inside; one end of the elastic component 14 is connected to the central lifting tube 1311 among the at least two lifting tubes 1311, 1312, and 1313, and the other end is connected to the first driving component 12, and is used to elongate or shorten under the drive of the first driving component 12. The at least two lifting tubes 1311, 1312, and 1313 are nested. The lifting tube with a smaller outer diameter can be located inside the lifting tube with a larger outer diameter. When the user uses the screen, the first driving component 12 operates to drive the elastic component 14 to elongate. During the elongation process, the elastic component 14 lifts the lifting tube with a smaller outer diameter located inside the lifting tube with a larger outer diameter, causing the lifting tube with a smaller outer diameter to rise, thereby driving the screen to rise; when the user finishes watching a movie and retracts the screen, the first driving component 12 operates to drive the elastic component 14 to contract. During the contraction process, the elastic component 14 reduces the supporting force on the lifting tube with a smaller outer diameter, causing the lifting tube with a smaller outer diameter to descend into the lifting tube with a larger outer diameter, thereby driving the screen 20 to descend.

[0052] Figure 3 It is a schematic structural diagram of the telescopic tube provided by an embodiment of the present application. Figure 3 The situation where there are two lifting tubes among the at least two lifting tubes is shown. When the screen rises, the lifting tube 1311 with a smaller diameter rises from the lifting tube 1312 with a larger diameter. Figure 4 It is a three-dimensional structural diagram of the telescopic tube provided by an embodiment of the present application. Figure 4 The situation where there are two lifting tubes among the at least two lifting tubes is shown. After the screen descends, the lifting tube 1311 with a smaller diameter descends into the lifting tube 1312 with a larger diameter.

[0053] In addition, the lifting tube in the embodiment of the present application can be a cylindrical tube, or the lifting tube can also be a square tube, which is not limited in the embodiment of the present application. The number of lifting tubes is related to the screen size and the size of the cabinet accommodating the screen lifting device in the height direction. Exemplarily, when the size of the cabinet of the screen lifting device in the height direction is large, the telescopic tube can include two lifting tubes with longer lengths. When the cabinet of the screen lifting device is lower, the telescopic tube can include three lifting tubes with shorter lengths.

[0054] Figure 5 It is a schematic structural diagram of the elastic component and the lifting component provided by an embodiment of the present application, Figure 5 The situation where the number of lifting tubes in the lifting component is 3 is shown in.

[0055] Optionally, the elastic component 14 includes a compression spring 141 and a connecting member 142. The first end of the compression spring 141 is connected to the lifting tube 1311 located at the center, and the second end of the compression spring 141 is connected to the base 11 or the outermost lifting tube among at least two lifting tubes. The first end of the connecting member 142 is connected to the first end of the compression spring 141 or the lifting tube 1311 located at the center, and the second end of the connecting member 142 is connected to the first driving component. The first driving component can pull the connecting member 142 to drive the compression spring 141 to contract.

[0056] The compression spring 141 has good stretchability and certain supporting force at the same time. A part of the connecting member 142 can be located in the first driving component 12 and is released or contracted as the first driving component 12 operates. When the screen rises, the first driving component 12 operates to release the connecting member 142, increasing the length of the part of the connecting member 142 located inside the telescopic tube, driving the compression spring 141 to elongate. One end of the compression spring 141 is connected to the lifting tube 1311 located at the center. Therefore, during the elongation of the compression spring 141, it can support the lifting tube 1311 located at the center to rise, thereby driving the screen to rise. When the screen descends, the first driving component operates to pull the connecting member 142. During the process of the connecting member 142 contracting to the first driving component, it pulls the lifting tube 1311 located at the center to descend, and the compression spring 141 is compressed. The connecting member 142 can be a connecting rope with certain toughness or a rigid chain, etc. The material of the connecting member is not limited in this embodiment of the present application as long as it can meet the above functions.

[0057] The outer diameters of the lifting tubes 1311, 1313, and 1312 increase in sequence. The figure shows the situation after all the lifting tubes have risen. The compression spring 141 can be a helical spring, and the connecting member 142 passes through the center of the compression spring 141. One end of both the connecting member 142 and the compression spring 141 is connected to the lifting tube located at the center, that is, the lifting tube with the smallest outer diameter. A pull ring can be provided in this lifting tube to fix the compression spring 141 and the connecting member 142, or other connection methods can be used to connect the central tube with the connecting member 142 and the compression spring 141. The embodiment of the present application does not limit this here.

[0058] Figure 6 It is a partial structural schematic diagram of the lifting tube provided by the embodiment of the present application.

[0059] Optionally, each of at least two lifting tubes further includes a guiding groove 15 and a guiding post 16. The guiding groove 15 is located on the outer wall of the lifting tube, and its extending direction is parallel to the length direction of the lifting tube. The guiding post 16 is located on the inner wall of the lifting tube, and its extending direction is parallel to the length direction of the lifting tube. Among at least two lifting tubes, the guiding post of the first lifting tube is assembled in the guiding groove of the second lifting tube. The first lifting tube and the second lifting tube are two adjacent lifting tubes, and the outer diameter of the first lifting tube is greater than that of the second lifting tube. The guiding groove 15 can be provided along the length direction of the entire outer wall of the lifting tube, or a raised outer ring can be provided at one end of the lifting tube, and a guiding groove 15 that can cooperate with the guiding post 16 is provided on the outer ring. Figure 6 The guiding groove shown in Figure 6 is the second setting case. In order to make the lifting tube more stable during the lifting process, two guiding grooves 15 can be relatively provided at one end of the lifting tube, and two guiding posts 16 can also be relatively provided inside the lifting tube. The guiding groove 15 and the guiding post 16 cooperate with each other, and can also play a role in fixing the lifting tube during the rising and falling process of the lifting tube, avoiding the smaller-diameter lifting tube from shaking during the rising and falling process and thus shaking the screen.

[0060] Optionally, the lifting tube further has a limiting hole 17 and a one-way limiting claw 18. When the second lifting tube moves into the first lifting tube along the first direction under the guidance of the guiding groove and the guiding post to the first position (this first position can be a preset limiting position. When the second lifting tube moves to this position, its limiting claw just moves into the limiting hole of the first lifting tube), the one-way limiting claw of the second lifting tube snaps into the limiting hole of the first lifting tube and prevents the second lifting tube from continuing to move along the first direction. When the second lifting tube moves in the opposite direction of the first direction under the guidance of the guiding groove and the guiding post, the limiting claw of the second lifting tube disengages from the limiting hole of the first lifting tube. Figure 7 It is a schematic structural diagram of the one-way limiting claw of the second lifting tube snapping into the limiting hole of the first lifting tube. When the screen descends, the second lifting tube 1311 with a smaller outer diameter descends into the first lifting tube 1312 with a larger outer diameter. After continuously descending until the one-way limiting claw 18 of the second lifting tube 1311 snaps into the limiting hole 17 of the first lifting tube 1312, the second lifting tube 1311 stops moving. The screen descends to the lowest position.

[0061] The one-way limiting claw 18 can be an elastic inclined surface structure. When the second lifting tube moves along the first direction under the guidance of the guide groove and the guide column, the inclined surface structure of the second lifting tube slides against the inner wall of the first lifting tube under the action of elastic force, and the distance between the inclined surface structure and the inner wall of the first lifting tube gradually decreases along the first direction. When the second lifting tube moves to the first position, the inclined surface structure extends into the limiting hole of the first lifting tube under the action of elastic force, and is blocked by the hole wall of the limiting hole, thereby preventing the second lifting tube from continuing to move along the first direction.

[0062] Optional, such as Figure 3 As shown, both ends of each lifting tube also have a lifting limit structure 19, the lifting limit structure 19 at the end of the lifting tube away from the base includes a first limit protrusion 191 located on the inner wall, and the lifting limit structure at the end of the lifting tube close to the base includes a second limit protrusion 192 located on the outer wall; when the second lifting tube moves to the outside of the first lifting tube to the second position in the opposite direction of the first direction under the guidance of the guide groove and the guide column, the second limit protrusion of the second lifting tube is blocked by the first limit protrusion of the first lifting tube. The lifting limit structure 19 can prevent the lifting tube with a smaller outer diameter from being removed from the lifting tube with a larger outer diameter, thereby making the screen lifting device more stable. The second limit protrusion 192 can be arranged around the opening of the end of the lifting tube close to the base, and the guide groove 15 can be arranged on the second limit protrusion 192.

[0063] In one embodiment of the present application, after the screen is lowered, at least two lifting tubes nested in the telescopic tube are fixed by means of a limiting hole 17 and a one-way limiting claw 18, thereby reducing the shaking of the screen lifting device, thereby increasing the stability of the screen lifting device; after the screen is raised, at least two lifting tubes in the telescopic tube are fixed by means of a lifting limiting structure 19, thereby reducing the shaking of the screen lifting device, thereby increasing the stability of the screen lifting device.

[0064] The present application also provides another limiting structure for increasing the stability of the screen lifting device. Figure 8 A schematic diagram of the partial structure of another telescopic tube provided in an embodiment of the present application.

[0065] Optionally, the limit guiding structure 40 includes a guiding groove 15 located on the inner wall of the lifting pipe and a limit claw 41 fixed to the outer wall of the lifting pipe. The extending direction of the guiding groove 15 is parallel to the length direction of the lifting pipe, and a limit hole 42 is provided in the guiding groove 15. Among two adjacent lifting pipes, the limit claw 41 of the second lifting pipe is located in the guiding groove 15 of the first lifting pipe, and when the limit claw 41 of the second lifting pipe moves to the limit hole 42 under the guidance of the guiding groove 15 of the first lifting pipe, it is snapped into the limit hole 42. The first lifting pipe is the lifting pipe nested outside the second lifting pipe. Since the lifting pipes are nested lifting pipes, the lifting pipe with a smaller diameter is prone to shaking when rising and falling in the lifting pipe with a larger diameter. The guiding groove 15 on the inner wall of the lifting pipe with a larger diameter and the limit claw 41 on the outer wall of the lifting pipe with a smaller diameter can cooperate with each other to make the lifting pipe with a smaller diameter more stable when rising and falling. The length of the guiding groove 15 can be the same as the length of the lifting pipe or shorter than the length of the lifting pipe. The embodiments of the present application do not make any limitations here. In addition, when the limit claw 41 rises and falls along the guiding groove 15, it can also be snapped into the limit hole 42, and the lifting pipes are fixed through the clamping connection between the limit claw 41 and the limit hole 42.

[0066] Figure 9 Schematic diagram of the structure where the downward limit claw and the downward limit hole are clamped. Figure 9 In which the first lifting pipe with a larger diameter is used as Figure 2 the lifting pipe 1313 in [reference], and the second lifting pipe with a smaller diameter is Figure 2 the lifting pipe 1311 in [reference] as an example to show the situation where the downward limit claw of the lifting pipe with a smaller diameter is clamped with the downward limit hole of the lifting pipe with a larger diameter.

[0067] Optionally, the limit pawl 41 includes a downward limit pawl 411, and the limit hole 42 includes a downward limit hole 421; when the downward limit pawl 411 of the second lifting tube 1311 moves along the first direction to the downward limit hole 421 of the first lifting tube 1313 under the guidance of the guide groove of the first lifting tube 1313, it snaps into the downward limit hole 421 of the first lifting tube 1313 and prevents the second lifting tube 1311 from continuing to move along the first direction f. When the downward limit pawl 411 of the second lifting tube 1311 moves along the opposite direction of the first direction f under the guidance of the guide groove and the downward limit pawl 411 of the first lifting tube 1313, the downward limit pawl 411 of the second lifting tube 1311 disengages from the downward limit hole 421 of the first lifting tube 1313. In the embodiment of the present application, the first direction refers to the running direction when the lifting tube with a smaller diameter descends to the lifting tube with a larger diameter, and the opposite direction of the first direction refers to the running direction when the lifting tube with a smaller diameter rises out of the lifting tube with a larger diameter. The downward limit pawl 411 is located at one end of the outer wall of the lifting tube close to the base. The downward limit pawl 411 can pass through the downward limit hole 421 and be snap-connected with the downward limit hole 421 to fix two adjacent lifting tubes. When the second lifting tube 1311 rises along the opposite direction of the first direction f, the downward limit pawl 411 disengages from the downward limit hole 421, thereby releasing the fixation of two adjacent lifting tubes.

[0068] Figure 10 It is a schematic structural diagram of the engagement between the upward limit pawl and the upward limit hole. Figure 10 In which the first lifting tube with a larger diameter is used as Figure 2 the lifting tube 1312 in, and the second lifting tube with a smaller diameter is Figure 2 the lifting tube 1313 in as an example, showing the situation where the upward limit pawl of the lifting tube with a smaller diameter engages with the upward limit hole of the lifting tube with a larger diameter.

[0069] Optionally, the limit pawl 16 includes an upward limit pawl 412, and the limit hole 17 includes an upward limit hole 422; when the upward limit pawl 412 of the second lifting tube 1313 moves in the opposite direction of the first direction f under the guidance of the guiding groove of the first lifting tube 1312 to the upward limit hole 422 of the first lifting tube 1312, it snaps into the upward limit hole 422 of the first lifting tube 1312 and prevents the second lifting tube 1313 from continuing to move in the opposite direction of the first direction. When the upward limit pawl 412 of the second lifting tube 1313 moves in the first direction under the guidance of the guiding groove and the upward limit pawl 412 of the first lifting tube 1312, the upward limit pawl 412 of the second lifting tube 1313 disengages from the upward limit hole of the first lifting tube 1312. The upward limit hole 422 is located at the end of the lifting tube away from the base. When the second lifting tube 1313 rises from within the first lifting tube 1312, the upward limit pawl 412 of the second lifting tube 1313 rises along the guiding groove of the first lifting tube 1312. The upward limit pawl 412 and the guiding groove cooperate with each other, making the second lifting tube 1313 more stable when rising and not prone to shaking. When the second lifting tube 1313 rises to the designated position, the upward limit pawl 412 of the second lifting tube 1313 enters the upward limit hole 422 of the first lifting tube 1312, and the second lifting tube 1313 stops rising, realizing the fixation of two adjacent lifting tubes. When the second lifting tube 1313 descends along the first direction f, the upward limit pawl 412 disengages from the upward limit hole 422. The designated position is any position where the end of the second lifting tube 1313 close to the base is located within the first lifting tube 1312.

[0070] Figure 11 For Figure 8 the overall structural schematic diagram of the lifting tube shown.

[0071] Optionally, in the lifting tube, the upward limit pawl 412 and the downward limit pawl 411 are in the same position in the circumferential direction of the lifting tube, the upward limit hole 422 and the downward limit hole 421 are in the same position in the circumferential direction of the lifting tube, and the upward limit pawl 412 and the upward limit hole 422 are in different positions in the circumferential direction of the lifting tube. When the upward limit pawl and the upward limit hole of the same lifting tube are in different positions in the circumferential direction, it is convenient to engage with the adjacent lifting tube. In addition, each lifting tube in the telescopic tube may include an upward limit pawl 412, a downward limit pawl 411, an upward limit hole 422, and a downward limit hole 421. In this setting, any lifting tube can be combined with other lifting tubes, facilitating installation and replacement.

[0072] In another embodiment, among at least two lifting tubes of the telescopic tube, the lifting tube with the largest diameter may include an upward limit hole 422 and a downward limit hole 421, the lifting tube with the smallest diameter may include an upward limit claw 412 and a downward limit claw 411, and several lifting tubes located between the lifting tube with the largest diameter and the lifting tube with the smallest diameter may include both the upward limit claw 412 and the downward limit claw 411, and also the upward limit hole 422 and the downward limit hole 421.

[0073] Optionally, both the upward limit claw 412 and the downward limit claw 411 include an inclined surface structure formed by the tube wall of the telescopic tube, and the inclined surface structure is formed by bending the tube wall. The upward limit claw 412 and the downward limit claw 411 form a certain angle with the tube wall to form an inclined surface, and the inclined surface may be in an open form with the tube wall, facilitating the limit claw to be inserted into the limit hole. Taking Figure 9 the downward limit claw 411 in as an example, three sides can be cut at the position of the downward limit claw 411 on the tube wall, and the side of the downward limit claw 411 away from the base is not processed, obtaining a card with one side connected to the tube wall and the other three sides separated from the tube wall. The card is bent to obtain the downward limit claw 411 integrally formed with the tube wall. The downward limit claw 411 can also be a card fixedly connected to the tube wall at a specified position in a welding or other manner to form an inclined surface structure with the tube wall.

[0074] Figure 12 FIG. is a schematic structural diagram of another telescopic tube provided by an embodiment of the present application. Figure 12 In, at least two lifting tubes in the telescopic tube are nested together. When the external power assembly pulls the connecting member, the compression spring is compressed, and the lifting tube with a smaller diameter loses the support of the compression spring and descends into the lifting tube with a larger diameter until multiple lifting tubes are all nested in the lifting tube 1312 connected to the base, and the downward limit claw 411 of the lifting tube adjacent to the lifting tube 1312 is inserted into the downward limit hole 421 of the lifting tube 1312 for fixation.

[0075] Figure 2 The lifting tube in the screen lifting device shown in can use any one of the above two telescopic tubes, which can both increase the stability of the screen lifting device.

[0076] Optionally, the first driving assembly 12 includes a motor 121 and a rotating shaft 122 connected to the motor, and the rotating shaft is connected to the connecting member. The motor 121 is located in the middle of the base 11, that is, at the central position of the two telescopic tubes. The motor 121 is connected to the rotating shaft 122 and drives the rotating shaft 122 to rotate during operation. Figure 13It is a schematic structural diagram of the connection between the connecting piece and the rotating shaft provided by the embodiment of the present application. One end of the connecting piece 142 can be connected to the rotating shaft 122 through a pin 143. A part of the connecting piece 142 is stored on the rotating shaft 122 in a winding manner. When the screen is raised, the motor operates, and the connecting piece 142 wound on the rotating shaft 122 is released; when the screen is lowered, the motor operates, and the connecting piece 142 is wound around the rotating shaft 122 again. The connecting piece 142 and the rotating shaft 122 can also be fixed in other ways, which are not limited in the embodiment of the present application.

[0077] Optionally, the first driving assembly 12 further includes a gear 123 and a gear conveyor belt 124. The rotating shaft 122 passes through the center of the gear 123 and is fixedly connected to the gear 123. The gear conveyor belt 124 meshes with the gear 123 and the driving wheel of the motor 121 respectively. When the motor operates, the driving wheel of the motor 121 rotates and meshes with the gear 123 to transmit power to the gear 123. While the gear 123 rotates, the axial force of the gear 123 drives the rotating shaft 122 located at the center of the gear 123 to rotate. The motor 121 and the rotating shaft 122 can also transmit power through other structures, which are not limited in the embodiment of the present application.

[0078] The screen lifting device shown in the present application may further include a second driving assembly and a screen storage rod 22. The second driving assembly includes two motors 211 and 212. The two motors 211 and 212 are respectively arranged at both ends of the screen storage rod 22. When the motors 211 and 212 operate, the screen storage rod 22 rotates. The screen storage rod 22 can be cylindrical, and the screen 20 is curled and stored on the screen storage rod 22. The screen storage rod 22 can roll up or release the screen 20 during the rotation process. The screen storage rod 22 can be directly connected to the two motors 211 and 212, or can be connected through gears and gear conveyor belts, which are not limited in the embodiment of the present application.

[0079] When the screen lifting device descends, the second driving assembly and the first driving assembly 12 operate simultaneously, and the screen 20 descends accordingly. The screen storage rod 22 can roll up the screen 20 for storage during the rotation process. When the screen lifting device ascends, the second driving assembly and the first driving assembly 12 operate simultaneously. The screen storage rod 22 can release the screen 20 during the reverse rotation process, and the lifting tube raises the released screen 20.

[0080] The screen lifting device shown in the present application may further include a screen connecting rod 23. The rod body of the screen connecting rod 23 is connected to the top of the screen 20, and the rod body of the screen connecting rod 23 is simultaneously connected to one end of the telescopic tube. When the telescopic tube ascends and descends, it can drive the screen connecting rod 23 to ascend and descend. When the screen connecting rod 23 ascends and descends, it can drive the screen 20 to ascend and descend.

[0081] In summary, the embodiment of the present application provides a screen lifting device including a driving component and a lifting component. The driving component in it can drive the telescopic tube in the lifting component to drive the screen to rise or fall while elongating or shortening. The telescopic tube can continuously support the screen when elongating and shortening, making the screen relatively stable. This solves the problem of poor stability of the screen in the related art and achieves the effect of improving the stability of the screen.

[0082] Figure 14 It is a schematic structural diagram of a laser TV shown in the embodiment of the present application.

[0083] Optionally, the laser TV 30 includes the screen lifting device in any of the above embodiments. The laser TV may include a TV cabinet 31, a screen lifting device 32, a projection device 33, and a screen 20. The screen lifting device is located inside the TV cabinet 31, that is, hidden in the TV cabinet 31. The projection device 33 is connected to the TV cabinet 31 and is located on the side of the TV cabinet facing the audience. The projection device projects the laser image onto the TV screen. Since the TV screen in the present application rises and falls smoothly, there is no need for multiple adjustments and focusing, and the display screen of the laser TV is clearer and has a longer service life. When the user watches TV, the screen lifting device is started, and the screen 20 rises from the TV cabinet 31. At this time, the specific structure of the laser TV seen by the audience is as Figure 10 shown. Figure 15 is Figure 14 a schematic three-dimensional structural diagram of the other side of the laser TV shown. When the screen rises, the telescopic tube in the screen lifting device 32 is located behind the screen 20. During the user's movie viewing process, the telescopic tube can support the screen and is not affected by the environment, without shaking. During the screen lifting process and the process of watching the screen, the screen is stable, there is no need for multiple focusing adjustments, the stability of the screen lifting device is increased, and the user experience is improved.

[0084] Figure 16 is Figure 14 a schematic diagram of the state after the screen lifting device in the laser TV shown descends. When the user finishes watching, the screen lifting device is started, and the screen descends into the TV cabinet 31, and the entire screen lifting device and the screen are hidden in the TV cabinet 31.

[0085] The display screen of a TV is usually placed on the TV cabinet in the living room. If the screen is always placed on the TV cabinet and accidentally touched, causing the screen to move, the projection effect will be poor, and it is necessary to frequently adjust the screen or the projection image. Or, as in the related art, the screen is released from the roller and hangs down, shaking during the hanging process and continuing to shake for a certain period of time after reaching the lowest point of the vertical drop. At this time, the imaging displayed by the projection device on the screen is not clear, resulting in display problems such as virtual focus and blurring on the screen when the user watches TV at the initial stage. However, the screen lifting device used in this application can store the screen when not watching the screen and lift the screen when watching. The screen lifting device has good stability, and the laser TV does not need to frequently adjust the picture and the screen position. Moreover, the screen lifting device in this application has low noise and good stability, and is flexible to use, thus improving the user experience.

[0086] In summary, the embodiment of the present application provides a laser TV, including a screen lifting device. The screen lifting device includes a driving component and a lifting component. The driving component in it can drive the telescopic tube in the lifting component to drive the screen to rise or fall while the telescopic tube extends or contracts. The telescopic tube can continuously support the screen when extending and contracting, making the screen relatively stable. It solves the problem of poor stability of the screen in the related art and achieves the effect of improving the stability of the screen.

[0087] The above are only the optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A screen lifting device, characterized in that, The screen lifting device includes a base, a first driving component, and a lifting component located on the base; The lifting component includes at least one telescopic tube. Each telescopic tube is installed on the base and one end thereof is connected to one side of the screen; The first driving component is connected to each telescopic tube and is used to drive the telescopic tube to extend or contract so as to drive the screen to rise or fall; The telescopic tube includes: at least two lifting tubes nested in sequence from outside to inside and an elastic force component. The outer diameters of the at least two lifting tubes gradually decrease from outside to inside. Each of the at least two lifting tubes further includes: a guiding groove and a guiding post. The guiding groove is located on the outer wall of the lifting tube and the extending direction thereof is parallel to the length direction of the lifting tube. The guiding post is located on the inner wall of the lifting tube and the extending direction thereof is parallel to the length direction of the lifting tube. Among the at least two lifting tubes, the guiding post of the first lifting tube is assembled in the guiding groove of the second lifting tube; The lifting tube further has a limiting hole and a one-way limiting claw. When the second lifting tube moves inside the first lifting tube along a first direction to a first position under the guidance of the guiding groove and the guiding post, the one-way limiting claw of the second lifting tube snaps into the limiting hole of the first lifting tube and prevents the second lifting tube from continuing to move along the first direction. When the second lifting tube moves along the opposite direction of the first direction under the guidance of the guiding groove and the guiding post, the limiting claw of the second lifting tube disengages from the limiting hole of the first lifting tube.

2. The screen lifting device according to claim 1, wherein One end of the elastic force component is connected to the lifting tube located at the center among the at least two lifting tubes, and the other end is connected to the first driving component and is used to extend or contract under the drive of the first driving component.

3. The screen lifting device according to claim 2, wherein The elastic force component includes a compression spring and a connecting piece. The first end of the compression spring is connected to the lifting tube located at the center. The second end of the compression spring is connected to the base or the outermost lifting tube among the at least two lifting tubes. The first end of the connecting piece is connected to the first end of the compression spring or the lifting tube located at the center. The second end of the connecting piece is connected to the first driving component. The first driving component can pull the connecting piece to drive the compression spring to contract.

4. The screen lifting device according to claim 2, wherein, The first lifting tube and the second lifting tube are two adjacent lifting tubes, and the outer diameter of the first lifting tube is larger than that of the second lifting tube.

5. The screen lifting device according to claim 1, wherein, Both ends of each lifting tube further have a lifting limiting structure. The lifting limiting structure at the end of the lifting tube far from the base includes a first limiting protrusion located on the inner wall. The lifting limiting structure at the end of the lifting tube close to the base includes a second limiting protrusion located on the outer wall; When the second lifting tube moves outside the first lifting tube along the opposite direction of the first direction to a second position under the guidance of the guiding groove and the guiding post, the second limiting protrusion of the second lifting tube is blocked by the first limiting protrusion of the first lifting tube.

6. The screen lifting device according to claim 3, characterized in that, The first driving component includes a motor and a rotating shaft connected to the motor. The rotating shaft is connected to the connecting piece.

7. The screen lifting device according to claim 6, wherein, The first driving component further includes a gear and a gear conveyor belt. The rotating shaft passes through the center of the gear and is fixedly connected to the gear. The gear conveyor belt meshes with the gear and the driving wheel of the motor respectively.

8. A laser TV, characterized in that, The laser TV includes the screen lifting device according to any one of claims 1-7.

9. The laser TV according to claim 8, wherein, The laser TV further includes a TV cabinet and a projection component; There is an opening on the TV cabinet. The screen lifting device is located inside the TV cabinet and is used to lift the screen from the opening. The projection component is connected to the outer surface of the TV cabinet.

Images