Telescopic platform applied to ultra-short-focus projection equipment and ultra-short-focus projection equipment

Abstract

The invention provides a telescopic platform applied to ultra-short-focus projection equipment and the ultra-short-focus projection equipment. The telescopic platform comprises a supporting seat and a telescopic rod, wherein a driving device is arranged on the supporting seat; the moving table is movably arranged on the supporting seat, is connected with the driving device, and is used for bearing the projection host, driving the projection host to move to the extension position when the projection host is started so as to adjust the distance between the projection main body and the projection screen, and driving the projection host to move to the retraction position when the projection host is closed; a driving part of the driving device is connected with the output end of the driving motor and connected with a transmission part, the transmission part is connected with the moving table, the transmission part drives the moving table to be switched between the extending position and the retracting position, and an elastic buffering mechanism is arranged at the connecting position of the driving part and the transmission part. Elastic connection between the driving part and the transmission part is achieved through the elastic buffering mechanism, so that the elastic buffering mechanism plays a buffering role to prevent fingers from being injured when the fingers of a user are clamped, and the use experience of the telescopic platform is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of projection display technology, and in particular to a telescopic platform applied to an ultra-short-throw projection device and an ultra-short-throw projection device. Background Technology

[0002] Currently, ultra-short-throw projection equipment such as laser TV is used in many occasions. Laser TV includes a projection host and a projection screen. The laser is emitted from the projection host and projected onto the projection screen. It is reflected by the projection screen and enters the human eye to form an image. The projection ratio of laser TV refers to the size of the largest and smallest images projected onto the projection screen at the same distance. Since the laser TV forms an image through reflection from the projection screen, the projection ratio of the projection host needs to match that of the screen. At the same time, during the use of laser TV, users will adjust the positional relationship between the projection host and the projection screen according to their preferences to meet the projection screens of different sizes.

[0003] Usually, the projection host needs to be placed on a TV cabinet, but the depth of the existing TV cabinet cannot meet the depth of the TV cabinet required by the laser TV projection ratio, so a telescopic platform is usually used to assist the projection host to reach the specified position. The existing telescopic platform includes a base and a moving plate for carrying the projection host. The moving plate can be extended relative to the base under the drive of a driving mechanism. After the projection host is placed on the moving plate, the laser projection device can be moved to the specified position by adjusting the telescopic length of the moving plate.

[0004] However, the existing telescopic platform is prone to problems such as stuck and jamming due to assembly errors of the driving mechanism. In addition, when the driving mechanism drives the movable plate to move from the extended position to the retracted position, if the user's fingers or other body parts are in the gap between the movable plate and the base, the movable plate will exert a large force on the user's fingers or other body parts under the driving force of the driving mechanism, which may easily pinch the user's fingers or other body parts, affecting the user's experience of using the telescopic platform to adjust the relative position between the projection host and the projection screen. SUMMARY OF THE INVENTION

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a telescopic platform applied to an ultra-short-throw projection device and an ultra-short-throw projection device.

[0006] Based on this, the first aspect of the present disclosure provides a telescopic platform for ultra-short-throw projection equipment, including:

[0007] A support seat, wherein a driving device is arranged on the support seat;

[0008] The mobile station, with the active part arranged on the support base and connected to the driving device, is used to carry the projection host of the ultra-short throw projection device, and drive the projection host to move to the extended position when the projection host is turned on, so as to adjust the distance between the projection host and the projection screen, and drive the projection host to move to the retracted position when the projection host is turned off;

[0009] Wherein, the driving device includes a driving motor, a driving member and a transmission member. The output end of the driving motor is connected to the driving member, the driving member is connected to the transmission member, and the transmission member is connected to the mobile station, so as to drive the mobile station to switch between the extended position and the retracted position through the transmission member;

[0010] An elastic buffer mechanism is arranged at the connection part of the driving member and the transmission member, so as to realize the elastic connection between the driving member and the transmission member through the elastic buffer mechanism.

[0011] Optionally, mounting holes are correspondingly arranged on the driving member and the transmission member. The driving member is connected to the transmission member through a fastener passing through the mounting hole. The elastic buffer mechanism is sleeved on the fastener and elastically supports between one of the driving member and the transmission member and the fastener, or elastically supports between the driving member and the transmission member.

[0012] Optionally, the driving member includes a lead screw and a lead screw nut. The lead screw is connected to the output end of the driving motor. The lead screw nut is sleeved on the lead screw and is threadedly connected to the lead screw. The driving motor drives the lead screw nut to make a reciprocating linear motion on the lead screw;

[0013] The mounting holes are correspondingly arranged on the lead screw nut and the transmission member. The lead screw nut is connected to the transmission member through the fastener passing through the mounting hole. The elastic buffer mechanism is sleeved on the fastener and elastically supports between one of the lead screw nut and the transmission member and the fastener, or elastically supports between the lead screw nut and the transmission member.

[0014] Optionally, the fastener includes a connecting bolt and a connecting nut. One end of the connecting bolt passes through the lead screw nut and the transmission member and is threadedly connected to the connecting nut. The elastic buffer mechanism includes an elastic member. The elastic member is sleeved on the connecting bolt and elastically supports between the connecting nut and the transmission member;

[0015] Optionally, the number of the elastic buffer mechanisms is at least two, and at least two elastic buffer mechanisms are arranged at intervals around the central axis of the lead screw nut;

[0016] Optionally, mounting through holes are formed in the transmission member, and the transmission member is sleeved on the lead screw nut through the mounting through holes, and there is a clearance fit between the mounting through holes and the lead screw nut.

[0017] Optionally, the transmission member includes a transmission piece and a connecting piece connected to each other. The transmission piece is connected to the driving member, and the connecting piece is connected to the moving platform.

[0018] Optionally, two sliding assemblies are arranged on the support base. The two sliding assemblies are respectively arranged on both sides of the driving device. The connecting piece is connected to one of the sliding assemblies, and the moving platform is fixedly connected to the two sliding assemblies. The connecting piece transmits power to the moving platform through the sliding assembly fixedly connected to the connecting piece.

[0019] Optionally, the driving motor is arranged at one end of the support base close to the projection screen;

[0020] Optionally, an adjusting bolt is arranged on the moving platform. The adjusting bolt is used to connect with the fixing hole on the projection host, so as to drive the projection host to move along the axial direction of the adjusting bolt by rotating the adjusting bolt.

[0021] Optionally, a controller is further included. The controller is electrically connected to the driving motor and is used to control the start and stop of the driving motor. And the controller is used to control the driving motor to stop working when the current of the driving motor is greater than the set current.

[0022] Optionally, an electrical connection port is arranged on the telescopic platform. The telescopic platform is electrically connected to the projection host through the electrical connection port, so as to control the telescopic movement of the moving platform relative to the support base through a remote controller adapted to the projection host, and the telescopic position of the moving platform relative to the support base is displayed in real time through the projection screen;

[0023] When the moving platform moves relative to the support base so that the projection host moves relative to the projection screen to a set projection position, the remote controller controls the driving motor to stop running, and the controller records the position of the moving platform at this time as the extended position of the moving platform.

[0024] In a second aspect of the present disclosure, a ultra-short throw projection device is provided, including a projection host, a projection screen, and a telescopic platform applied to the ultra-short throw projection device as described in any one of the above. The projection host is carried on the moving platform of the telescopic platform, the projection port of the projection host faces the projection screen, and the moving platform drives the projection host to move in a direction close to or away from the projection screen.

[0025] The technical solution provided by the present disclosure has the following advantages compared with the prior art:

[0026] The telescopic platform and the ultra-short throw projection device provided by the present disclosure are applied to an ultra-short throw projection device. By arranging a driving device on a support base, the moving platform can be driven by the driving device to move relative to the support base between an extended position and a retracted position. At the same time, the moving platform is used to carry a projection host, so that the movement of the moving platform drives the projection host to move, thereby achieving the purpose of adjusting the relative position between the projection host and the projection screen. Specifically, when the projection host is turned on, the moving platform of the telescopic platform drives the projection host to move to the extended position to adjust the distance between the projection host and the projection screen. When the projection host is turned off, the moving platform of the telescopic platform drives the projection host to move to the retracted position; by arranging an elastic buffer mechanism at the connection part between the driving member and the transmission member of the driving device, the connection between the driving member and the transmission member is formed as a soft connection. Such a setting provides a larger margin for the installation and cooperation of the driving member and the transmission member on the one hand, and avoids problems such as jamming or jamming of the telescopic platform caused by the accumulation of assembly tolerances of structures such as the driving member and the transmission member of the driving device. On the other hand, at least when the driving motor drives the driving member to move and the moving platform moves towards the retracted position, the driving member transmits power to the transmission member and the elastic buffer mechanism can undergo elastic deformation. When a user's finger is caught in the gap between the moving platform and the support base, the elastic buffer mechanism will further deform due to the obstruction of foreign objects, thereby slowing down the speed at which the distance between the moving platform and the support base decreases and delaying the time when the user's finger receives a large squeezing force. Thus, under the buffering action of the elastic buffer mechanism, the user has more time to withdraw body parts such as fingers, avoiding direct injury to the user's fingers and other body parts by a large acting force, thereby improving the safety of using the telescopic platform and further improving the user experience of using the telescopic platform to adjust the relative position between the projection host and the projection screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of the telescopic platform according to the embodiment of the present disclosure;

[0030] Figure 2 is a top view of the telescopic platform according to the embodiment of the present disclosure;

[0031] Figure 3 Side view of the telescopic platform according to the embodiment of the present disclosure;

[0032] Figure 4 Schematic structural diagram of the telescopic platform according to the embodiment of the present disclosure after removing the moving platform;

[0033] Figure 5 Top view of the telescopic platform according to the embodiment of the present disclosure after removing the moving platform;

[0034] Figure 6 Schematic structural diagram of the driving device according to the embodiment of the present disclosure;

[0035] Figure 7 Side view of the driving device according to the embodiment of the present disclosure;

[0036] Figure 8 Top view of the driving device according to the embodiment of the present disclosure;

[0037] Figure 9 Side view of the adjusting bolt according to the embodiment of the present disclosure;

[0038] Figure 10 Schematic structural diagram of the adjusting bolt according to the embodiment of the present disclosure;

[0039] Figure 11 Side view of the adjusting bolt and the moving platform main body after being assembled according to the embodiment of the present disclosure;

[0040] Figure 12 Schematic structural diagram of the lead screw nut according to the embodiment of the present disclosure;

[0041] Figure 13 Schematic structural diagram of the ultra-short throw projection device in the retracted position according to the embodiment of the present disclosure;

[0042] Figure 14 Schematic structural diagram of the ultra-short throw projection device in the extended position according to the embodiment of the present disclosure.

[0043] Among them, 1 is the support base; 2 is the moving platform; 21 is the moving platform main body; 211 is the adjustment hole; 22 is the adjustment bolt; 221 is the height adjustment bolt; 222 is the adjustment plate; 223 is the gasket; 224 is the locking bolt; 3 is the driving device; 31 is the driving motor; 32 is the driving member; 321 is the lead screw; 322 is the lead screw nut; 323 is the nut main body; 324 is the connecting plate; 33 is the transmission member; 331 is the transmission piece; 332 is the connecting member; 333 is the first plate body; 334 is the second plate body; 34 is the elastic buffer mechanism; 341 is the connecting bolt; 342 is the connecting nut; 343 is the elastic member; 4 is the controller; 5 is the sliding assembly; 51 is the slide rail; 52 is the slider; 61 is the detector; 62 is the sensing member; 7 is the projection host; 8 is the projection screen. Specific embodiments

[0044] In order to more clearly understand the above-mentioned objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0045] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0046] Referring to Figures 1 to 14 As shown, the embodiment of the present disclosure provides a telescopic platform applied to an ultra-short throw projection device, and the relative position between the projection host 7 and the projection screen 8 of the ultra-short throw projection device can be adjusted by using this telescopic platform.

[0047] Specifically, the telescopic platform includes: a support base 1, a moving platform 2, and a driving device 3. Among them, the driving device 3 is arranged on the support base 1, that is, the driving device 3 is arranged on the support base 1; the moving platform 2 is movably arranged on the support base 1 and is connected to the driving device 3, and is used to carry the projection host 7 of the ultra-short throw projection device, and drive the projection host 7 to move to the extended position when the projection host 7 is turned on, so as to adjust the distance between the projection host 7 and the projection screen 8, and drive the projection host 7 to move to the retracted position when the projection host 7 is turned off.

[0048] Among them, the driving device includes a driving motor 31, a driving member 32, and a transmission member 33. The output end of the driving motor 31 is connected to the driving member 32, the driving member 32 is connected to the transmission member 33, and the transmission member 33 is connected to the moving platform 2, so as to drive the moving platform 2 to switch between the extended position and the retracted position through the transmission member 33.

[0049] Specifically, the telescopic platform further includes a controller 4, which is electrically connected to the driving device 3 and used to control the start and stop of the driving device 3. Specifically, the controller 4 is electrically connected to the driving motor 31 of the driving device 3 and used to control the start and stop of the driving motor 31.

[0050] It should be noted that the ultra-short throw projection device can be selected as a laser TV, or of course it can also be selected as an ultra-short throw projector. The ultra-short throw projection device generally includes a projection host 7 and a projection screen 8 matched with it. The projection screen 8 is used to carry the image projected by the projection host 7. The focal length of the projection image of the ultra-short throw projection device is relatively short, so that when the distance between the projection host 7 and the projection screen 8 is relatively close, an image can still be projected on the projection screen 8. However, due to the differences in the home environment and area, when the TV cabinet for placing the projection host 7 is relatively close to the projection screen 8 and the area of the TV cabinet is relatively small, the distance between the projection host 7 and the projection screen 8 is too close to complete the projection operation. Therefore, the ultra-short throw projection device is installed on a telescopic platform that can move horizontally, and the telescopic platform drives the projection host 7 to move in the direction of approaching or moving away from the projection screen 8, so that there is a suitable distance between the projection host 7 and the projection screen 8 when the projection host 7 is working. When the projection host 7 is not in use, the telescopic platform drives the projection host 7 back to the TV cabinet to reduce the floor area occupied by the projection host 7 and the telescopic platform.

[0051] It should be understood that the projection screen 8 is not limited to a specific screen structure and can also be a projection surface such as a wall.

[0052] Specifically, the retracted position can be selected as the position where the moving platform 2 moves towards the direction close to the projection screen 8 until the inner wall of the moving platform 2 fits with the support seat 1, so that both the projection host 7 and the telescopic platform are located on the TV cabinet; the extended position can be selected as the position where the moving platform 2 moves away from the projection screen 8, so that the projection host 7 installed on the moving platform 2 moves with the moving platform 2 until a suitable projection distance is maintained between the projection host 7 and the projection screen 8, so that the projection host 7 can project a clear image on the projection screen 8. At this time, the position of the moving platform 2 is the extended position; that is, the moving platform 2 can move from the retracted position towards the direction away from the projection screen 8 to reach the extended position, and the moving platform 2 can move from the extended position towards the direction close to the projection screen 8 to reach the retracted position.

[0053] That is to say, by arranging the driving device 3 on the support base 1, the moving platform 2 can be driven by the driving device 3 to move between the extended position and the retracted position relative to the support base 1. At the same time, the moving platform 2 is used to carry the projection host 7 of the ultra-short throw projection device, so that the projection host 7 is driven to move by the movement of the moving platform 2, and further the purpose of adjusting the relative position between the projection host 7 and the projection screen 8 is achieved. After the adjustment is in place, the controller 4 controls the driving device to stop running, so that a proper relative position is maintained between the projection host 7 and the projection screen 8, and further the display effect of the projection screen 8 is ensured.

[0054] The above-mentioned driving motor 31 is arranged on the support base 1, the driving member 32 is connected to the output end of the driving motor 31, and the output end of the driving motor 31 can drive the driving member 32 to move in a direction close to or away from the projection screen 8; between the driving member 32 and the transmission member 33, it can be selected to be connected to each other by bolts. It can be selected to set through holes on the transmission member 33, the bolts pass through the through holes and are connected to the driving member 32, and nuts are provided at one end of the bolts away from the driving member 32, so that the transmission member 33 cannot escape from the end of the bolt provided with the nut. The transmission member 33 is connected to the driving member 32, and the transmission member 33 can move close to or away from the driving member 32 on the bolt.

[0055] It can be selected that when the driving member 32 moves towards the extended position, the driving member 32 abuts against the transmission member 33, so that the driving member 32 drives the transmission member 33 to move and the moving platform 2 moves to the extended position. When the driving member 32 moves towards the retracted position, the nut on the bolt of the driving member 32 abuts against the transmission member 33, so that the movement of the driving member 32 drives the transmission member 33 to move, and thus the moving platform 2 moves to the retracted position.

[0056] Through the mutual cooperation among the driving motor 31, the driving member 32 and the transmission member 33, the movement of the moving platform 2 can be realized. However, in the actual production process, due to reasons such as machining errors and assembly errors, errors will accumulate during the assembly process of the driving member 32, the transmission member 33 and the moving platform 2. After the assembly is completed, when the driving member 32 moves, the transmission member 33 may deviate from the connection with the driving member 32 due to the errors generated during assembly, resulting in problems such as jamming or even jamming of the movement of the moving platform 2; and since the driving member 32 drives the transmission member 33 to move, the driving member 32 and the transmission member 33 transmit the driving force through direct or indirect abutment. When the moving platform 2 moves towards the retracted position, if the user's finger is located between the moving platform 2 and the support base 1, the driving force of the driving member 32 is directly transmitted to the moving platform 2 through the transmission member 33, and the moving platform 2 will exert a large extrusion force on the user's finger in a short time. The user will be caught by the moving platform 2 and the support base 1 and unable to withdraw before having time to react, resulting in the user's finger being pinched.

[0057] Based on this, in the telescopic platform applied to the ultra-short focus projection device provided by the embodiments of the present disclosure, an elastic buffer mechanism 34 is provided at the connection part between the driving member 32 and the transmission member 33, so as to realize the elastic connection between the driving member 32 and the transmission member 33 through the elastic buffer mechanism 34.

[0058] That is to say, by providing the elastic buffer mechanism 34 at the connection part between the driving member 32 and the transmission member 33 of the driving device 3, the connection between the driving member 32 and the transmission member 33 is formed into a soft connection. With such a setting, on the one hand, a larger margin is provided for the installation and cooperation of the driving member 32 and the transmission member 33, avoiding problems such as jamming or sticking of the telescopic platform caused by the accumulation of assembly tolerances of structures such as the driving member 32 and the transmission member 33 of the driving device 3; on the other hand, at least when the driving motor 31 drives the driving member 32 to move and the moving platform 2 moves towards the retracted position, the driving member 32 transmits power to the transmission member 33, and the elastic buffer mechanism 34 can undergo elastic deformation. In this way, when the user's finger is caught in the gap between the moving platform 2 and the support base 1, the elastic buffer mechanism 34 will further deform due to the obstruction of foreign objects, thereby slowing down the speed of the reduction of the distance between the moving platform 2 and the support base 1. Since the elastic buffer mechanism 34 is further compressed or stretched, the speed of the reduction of the distance between the moving platform 2 and the support base 1 along the moving direction of the moving platform 2 is slowed down, and the speed of the increase of the squeezing force exerted by the moving platform 2 on the user's finger in a short time is slowed down. The elastic buffer mechanism 34 plays a buffering role, enabling the user to withdraw the finger in time, avoiding the user's finger being injured by a large squeezing force in a short time, thus improving the safety of using the telescopic platform, and further improving the user experience of using the telescopic platform to adjust the relative position between the projection host 7 and the projection screen 8.

[0059] Specifically, the support base 1 can be selected as a rectangular housing, or a rectangular cavity is formed by a depression on one side of the support base 1, so that the driving device 3 can be installed inside the support base 1. The moving platform 2 can be selected as a rectangular panel, and at least a baffle is provided on one side edge of the panel along the first direction. When the moving platform 2 is in the retracted position, the baffle is arranged opposite to the support base 1 along the first direction. The baffle can be selected to be attached to the side surface of the support base 1, or of course, a small gap can be selected between the baffle and the support base 1; of course, the moving platform 2 can also be selected as a rectangular box structure. One side surface of the box structure along the first direction has a notch for avoiding the support base 1, and one surface of the box structure facing the support base 1 has an inlet and outlet. The support base 1 is installed inside the box structure through the inlet and outlet. When the moving platform 2 moves, it avoids the support base 1 through the notch, enabling the moving platform 2 to move between the extended position and the retracted position along the first direction.

[0060] When the above-mentioned support base 1 is placed on a plane, the first direction a can be selected as the direction parallel to the plane. When the support base 1 has a rectangular structure, the first direction a can be selected to be consistent with the length direction of the support base 1. Of course, the first direction can also be selected to be consistent with the width direction of the support base 1. The mobile platform 2 can be selected to be arranged on the side of the support base 1 away from the plane, so that the mobile platform 2 can be used to place the projection host 7. The two ends of the support base 1 along the first direction can be selected as the front end and the rear end. When the mobile platform 2 moves from the retracted position to the extended position, the moving direction is to move along the rear end towards the front end. The front end is the end away from the projection screen 8, and the rear end is the end close to the projection screen 8. The baffle is arranged at the front end of the projection screen 8. The retracted position can be selected as the mobile platform 2 moving towards the projection screen 8 until the baffle of the mobile platform 2 or the inner wall of the box structure along the first direction fits with the support base 1. The extended position can be selected as the mobile platform 2 moving away from the projection screen 8 along the first direction, so that the projection host 7 installed on the mobile platform 2 moves with the mobile platform 2 until a suitable projection distance is maintained between the projection host 7 and the projection screen 8, enabling the projection host 7 to project a clear image on the projection screen 8. At this time, the position of the mobile platform 2 is the extended position.

[0061] The above-mentioned driving member 32 can be selected as a screw rod 321 and a screw nut 322 that are connected in cooperation with each other. The screw rod 321 is arranged along the first direction and is connected to the driving motor 31. The screw nut 322 is connected to the screw rod in a matching manner. The transmission member 33 is connected to the screw nut, so that the driving motor 31 drives the screw rod 321 to rotate and drives the screw nut 322 to move along the first direction.

[0062] The above-mentioned transmission member 33 can be selected as a rectangular plate body. Of course, it can also be selected as a circular plate body. It can be selected that through holes are provided on the transmission member 33, and the driving member 32 is passed through the through holes, so that the transmission member 33 is sleeved on the driving member 32. It can be selected that two through holes are provided on the transmission member 33, and two columns are provided on the driving member 32. The columns extend along the first direction, and the two columns pass through the two through holes. The columns are movably connected to the through holes. The elastic buffer mechanism 34 can be selected as two springs. The springs are sleeved on the columns, and the two ends of the springs are respectively connected to the columns and the transmission member 33, so that the transmission member 33 is connected through the elastic buffer mechanism 34. When the screw rod 321 rotates, since the transmission member 33 is connected to the sliding assembly 5 and the columns pass through the through holes on the transmission member 33, the columns and the through holes limit the co-rotation of the screw nut 322 and the screw rod 321, so that the screw nut 322 and the screw rod 321 generate relative movement.

[0063] When the above-mentioned lead screw nut 322 moves along the lead screw 321, it can be selected that the elastic buffer mechanism 34 deforms first to generate an elastic force, and then the elastic buffer mechanism 34 pushes the transmission part 33 to move through the elastic force. Of course, it can also be selected that when the lead screw nut 322 moves along the lead screw 321 to drive the moving platform 2 to move towards the extended position, the lead screw nut 322 fits with the transmission part 33, so that the lead screw nut 322 applies a driving force to the transmission part 33. When the lead screw nut 322 moves along the lead screw 321 to drive the moving platform 2 to move towards the retracted position, the elastic buffer mechanism 34 deforms to generate an elastic force, and then the elastic buffer mechanism 34 pushes the transmission part 33 to move through the elastic force. That is, at least during the process of the moving platform 2 moving to the retracted position, the elastic buffer mechanism 34 deforms to transfer the driving force on the driving part 32 to the transmission part 33.

[0064] Of course, it can also be selected that the elastic buffer mechanism 34 is an elastic rubber ring. The rubber ring is arranged between the lead screw nut 322 and the transmission part 33. Both sides of the rubber ring are connected to the driving part 32 and the transmission part 33. When the driving part 32 moves in the first direction, the driving part 32 first applies a pressure to the rubber ring. After the rubber ring deforms, it applies an elastic force to the transmission part 33, so that the transmission part 33 moves together with the rubber ring.

[0065] The above-mentioned transmission part 33 can be selected to be arranged on the side of the driving part 32 away from the driving motor 31. The support column on the driving part 32 extends forward in the first direction. The support column passes through the through hole, so that the end of the support column is located on the side of the transmission part 33 away from the driving part 32. One end of the elastic buffer mechanism 34 is connected to the end of the support column on the side of the transmission part 33 away from the driving part 32, and the other end of the elastic buffer mechanism 34 is connected to the surface of the transmission part 33. Thus, when the moving platform 2 moves from the extended position to the retracted position, the driving part 32 moves in the first direction towards the direction close to the driving motor 31. The end of the support column of the driving part 32 applies a pressure to the elastic buffer mechanism 34, so that the elastic buffer mechanism 34 is compressed and applies an elastic force to the transmission part 33, so that the transmission part 33 moves along the first direction with the driving part 32. The transmission part 33 drives the moving platform 2 to move along the first direction towards the direction close to the projection screen 8, so that the moving platform 2 moves to the retracted position. Of course, it can also be selected that when the moving platform 2 moves towards the retracted position, the driving part 32 moves and the elastic buffer mechanism 34 is stretched to apply an elastic force to the transmission part 33, so that the transmission part 33 moves in the direction away from the front end.

[0066] When the above-mentioned driving member 32 and transmission member 33 are at rest, the elastic buffer mechanism 34 can be selected to be in a compressed state, so that the elastic buffer mechanism 34 exerts elastic forces in opposite directions on the end of the support column and the transmission member 33, thereby causing the transmission member 33 to fit with the driving member 32. When the driving member 32 moves towards the extended position, the driving member 32 directly exerts a driving force on the transmission member 33. When the driving member 32 moves towards the retracted position, the driving member 32 moves and the elastic buffer mechanism 34 is further compressed to generate an elastic force, and the elastic force of the elastic buffer mechanism 34 drives the transmission member 33 to move; at least when the driving member 32 drives the moving platform 2 to move towards the retracted position, the elastic buffer mechanism 34 deforms and transmits the driving force of the driving member 32 to the transmission member 33.

[0067] Of course, it can also be selected that when the driving member 32 and the transmission member 33 are at rest, the elastic buffer mechanism 34 is in a state of being neither stretched nor compressed between the end of the support column and the transmission member 33. When the driving member 32 moves, the elastic buffer mechanism 34 is stretched or compressed to transmit a driving force to the transmission member 33.

[0068] A slide rail in the first direction can be selectively arranged between the above-mentioned moving platform 2 and the support base 1. A slider is arranged in the slide rail, and the slider is slidably connected to the slide rail. The moving platform 2 is connected to the slider, and the transmission member 33 can be selectively connected to the slider, so that when the transmission member 33 moves in the first direction, the moving platform 2 is driven to slide through the slider. Of course, it can also be selected that the transmission member 33 is directly connected to the moving platform 2, so that when the transmission member 33 moves in the first direction, a driving force is directly exerted on the moving platform 2.

[0069] During the above process, when a user's finger or foreign object is in the gap between the moving platform 2 and the support base 1, since the elastic buffer mechanism 34 is further compressed or stretched, the speed at which the distance between the moving platform 2 and the support base 1 in the first direction decreases slows down, and the speed at which the extrusion force exerted by the moving platform 2 on the user's finger or foreign object increases within a short time slows down. The elastic buffer mechanism 34 plays a buffering role to prevent the user's finger or foreign object from being injured by a large extrusion force in a short time.

[0070] Generally, there is a gap between the above-mentioned mobile station 2 and the support base 1. If the mobile station 2 is directly connected to the driving member 32, the distance that the driving member 32 moves is the distance that the mobile station 2 moves. When the mobile station 2 moves from the extended position to the retracted position, when the user's finger extends into the gap between the mobile station 2 and the support base 1, since the driving force of the driving member 32 is transmitted to the mobile station 2 in real time, when the user's finger touches the mobile station 2, the continuous movement of the driving member 32 causes the distance between the mobile station 2 and the support base 1 to rapidly decrease, so that the driving force of the driving member 32 on the mobile station 2 directly exerts extrusion on the user's finger, and the user's finger will be subjected to a large extrusion force in a short time, and the user will be pinched by the mobile station 2 and the support base 1 before having time to react. In the embodiment of the present disclosure, by providing an elastic buffer mechanism 34 and a controller to monitor the output current of the drive motor 31, when the user's finger is pinched, first, the further deformation of the elastic buffer mechanism 34 slows down the speed of the reduction of the gap between the mobile station 2 and the support base 1, so that the elastic buffer mechanism 34 can play a buffering role, and the controller monitors the output current of the drive motor 31, and can timely detect and stop the drive motor 31 from working when the output current of the drive motor 31 increases due to the user's finger being pinched, so that the mobile station 2 stops moving, and the user can withdraw the finger from the gap between the mobile station 2 and the support base 1.

[0071] During specific use, the telescopic platform is installed on a plane, and the projection host 7 is installed on the mobile station 2. When the mobile station 2 is powered off, it is in the retracted position. When it is necessary to adjust the position of the projection host 7, the telescopic platform is started, and the controller controls the drive motor 31 to apply a driving force to the driving member 32. The driving member 32 applies a driving force to the transmission member 33, so that the transmission member 33 drives the mobile station 2 to move in the first direction. The driving member 32 moves in the direction away from the drive motor 31, so that the mobile station 2 moves from the retracted position towards the extended position. After the mobile station 2 moves to the extended position where the projection screen of the projection host 7 is clear, the drive motor 31 stops working, and the mobile station 2 remains stable in the extended position, and the projection host 7 performs projection work.

[0072] After the projection host 7 finishes working, the drive motor 31 drives the active member 32 to move towards the direction close to the drive motor 31. In this process, the elastic buffer mechanism 34 is compressed and applies an elastic force to the transmission member 33. Under the action of the elastic force, the transmission member 33 drives the moving platform 2 to move towards the retracted position. When the user's finger extends into the gap between the moving platform 2 and the support base 1 during the process of the moving platform 2 moving towards the retracted position, the moving platform 2 first contacts the user's finger during the movement. Since the user's finger has a certain hardness, the resistance to the movement of the moving platform 2 towards the retracted position increases. At this time, the elastic buffer mechanism 34 is further compressed, so that the reduction speed of the distance between the moving platform 2 and the support base 1 slows down, and the increasing speed of the pressure received by the user's finger within a short time decreases. The time for the moving platform 2 to apply a large squeezing force to the user's finger is extended, enabling the user to have enough reaction time to withdraw the finger from the gap between the moving platform 2 and the support base 1. The elastic buffer mechanism 34 plays a buffering role, slowing down the reduction speed of the distance between the moving platform 2 and the support base 1 when the user's finger is pinched, allowing the user to have reaction time to withdraw the finger from the gap between the moving platform 2 and the support base 1, and avoiding injury to the user's finger.

[0073] In the embodiment of the present disclosure, by arranging the elastic buffer mechanism 34 between the active member 32 and the transmission member 33, when the user's finger is pinched, the elastic buffer mechanism 34 first deforms further to slow down the reduction speed of the distance between the moving platform 2 and the support base 1, extending the time required for the moving platform 2 to apply a large pressure to the user's finger, enabling the elastic buffer mechanism 34 to play a buffering role and reducing the squeezing force received by the user's finger in a short time when the finger is pinched, so that the user can withdraw the finger in time before being pinched, improving the use experience of the telescopic platform.

[0074] Refer to Figures 4 to 8 As shown, in some embodiments, mounting holes are correspondingly provided on the active member 32 and the transmission member 33. The active member 32 is connected to the transmission member through a fastener passing through the mounting hole. The elastic buffer mechanism 34 is sleeved on the fastener and elastically supported between one of the active member 32 and the transmission member 33 and the fastener, or elastically supported between the active member 32 and the transmission member 33.

[0075] Specifically, the fastener can be selected as a cylindrical structure or a bolt. After the fastener passes through the mounting holes on the driving member 32 and the transmission member 33, one end of the fastener is connected to the driving member 32, and the other end is located on the side of the transmission member 33 away from the driving member 32 and is provided with a limiting member, so that the transmission member 33 cannot be disengaged from the end of the fastener away from the driving member 32, that is, the transmission member 33 can move along the fastener close to or the driving member 32. The elastic buffer mechanism 34 is sleeved on the fastener, and the elastic buffer mechanism 34 is located between the driving member 32 and the transmission member 33. One end of the elastic buffer mechanism 34 is connected to the driving member 32, and the other end is connected to the transmission member 33. When the driving member 32 moves in the direction close to the transmission member 33, the elastic buffer mechanism 34 is compressed to push the transmission member 33 to move. When the driving member 32 moves in the direction away from the transmission member 33, the elastic buffer mechanism 34 is stretched to pull the transmission member 33 to move.

[0076] Of course, the fastener can be selected to include a connecting bolt 341 and a connecting nut 342. The elastic buffer mechanism 34 includes an elastic member 343. One end of the connecting bolt 341 passes through the connecting plate 324 and the mounting hole of the transmission member 33 and is threadedly connected to the connecting nut 342. The elastic member 343 is sleeved on the connecting bolt 341 and is elastically supported between the connecting nut 342 and the transmission member 33.

[0077] Through holes are provided on both the above-mentioned driving member 32 and the transmission member 33 as mounting holes, so that the screw of the connecting bolt 341 passes through the through holes on the connecting plate 324 and the transmission member 33, and the connecting bolt 341 is fixedly connected to the driving member 32. A connecting nut 342 is installed at the end of the screw of the connecting bolt 341, so that the transmission member 33 is located between the driving member 32 and the connecting nut 342, and the connecting nut 342 restricts the elastic member 343 from disengaging from the screw. The elastic member 343 is sleeved on the screw of the connecting bolt 341. The elastic member 343 can be selected as a spring, and of course, it can also be selected as an elastic rubber ring. One end of the elastic member 343 on the screw is connected to the connecting nut 342, and the other end is connected to the surface of the transmission member 33 close to the nut.

[0078] By providing mounting holes corresponding to the driving member 32 and the transmission member 33, the driving member 32 is connected to the transmission member 33 through a fastener passing through the mounting hole. The elastic buffer mechanism 34 is sleeved on the fastener and is elastically supported between one of the driving member 32 and the transmission member 33 and the fastener, or elastically supported between the driving member 32 and the transmission member 33, so that the fastener can limit the direction of the elastic force of the elastic buffer mechanism 34 on the transmission member 33 and the driving member 32. The fastener can also improve the stability between the driving member 32 and the transmission member 33 and enhance the buffering effect of the elastic buffer mechanism 34.

[0079] Refer to Figure 4 、 Figure 5 、Figure 6 , Figure 7 and Figure 8 As shown in Figure 6 , Figure 7 and Figure 8 , in some embodiments, the driving member 32 includes a lead screw 321 and a lead screw nut 322. The lead screw 321 is connected to the output end of the driving motor 31. The lead screw nut 322 is sleeved on the lead screw 321 and is in threaded connection with the lead screw 321. The driving motor 31 drives the lead screw nut 322 to perform a reciprocating linear motion on the lead screw 321. Mounting holes are correspondingly provided on the lead screw nut 322 and the transmission member 33. The lead screw nut 322 is connected to the transmission member 33 through a fastener passing through the mounting hole. The elastic buffer mechanism 34 is sleeved on the fastener and is elastically supported between one of the lead screw nut 322 and the transmission member 33 and the fastener, or is elastically supported between the lead screw nut 322 and the transmission member 33.

[0080] Specifically, the lead screw 321 can be selected as a straight rod extending in the first direction. Threads are provided on the surface of the lead screw 321. A threaded hole is provided on the lead screw nut 322, so that the lead screw 321 is in threaded connection with the threaded hole on the lead screw nut 322, enabling the lead screw nut 322 to rotate relative to the lead screw 321 and be able to move along the first direction on the lead screw 321 through the thread. When the driving motor 31 drives the lead screw 321 to rotate, the lead screw nut 322 rotates relative to the lead screw 321, enabling the rotation of the lead screw 321 to drive the lead screw nut 322 to move along the first direction on the lead screw 321.

[0081] A through hole can be selected to be provided on the above-mentioned transmission member 33 as the mounting hole. The lead screw nut 322 can be selected to be provided with a connecting plate 324. The connecting plate 324 is perpendicular to the threaded hole of the lead screw nut 322, and a through hole is provided on the connecting plate 324 as the mounting hole. The lead screw 321 passes through the through hole on the transmission member 33, so that the transmission member 33 is sleeved on the lead screw 321. It can be selected that two through holes are provided on the transmission member 33 as the mounting holes, and two mounting holes are provided on the lead screw nut 322. Two fasteners are respectively passed through the mounting holes on the lead screw nut 322 and the transmission member 33. The fasteners extend in the first direction. The fasteners are fixedly connected to the lead screw nut 322 and are movably connected to the mounting holes of the transmission member 33, and a limiting member is provided at one end of the fastener away from the lead screw nut 322. The elastic buffer mechanism 34 can be selected as two springs. The springs are sleeved on the fasteners, and the two ends of the springs are respectively connected to the limiting member of the fastener and the transmission member 33, so that the transmission member 33 is connected to the fastener through the elastic buffer mechanism 34. When the lead screw 321 rotates to push the lead screw nut 322 to move, when the lead screw nut 322 moves in the direction close to the transmission member 33, the lead screw nut 322 can abut against the transmission member 33 to push the transmission member 33 to move. When the lead screw nut 322 moves in the direction away from the transmission member 33, the lead screw nut 322 first compresses the springs of the elastic buffer mechanism 34, and the springs apply an elastic force to the transmission member 33 to push the transmission member 33 to move.

[0082] When the lead screw 321 rotates, since the transmission member 33 is connected to the moving table 2 and the fastener passes through the mounting hole of the transmission member 33, the fastener and the mounting hole of the transmission member 33 restrict the co-rotation of the lead screw nut 322 with the lead screw 321, causing the lead screw nut 322 to move along the lead screw 321.

[0083] Of course, it is also possible to choose to sleeved the elastic buffer mechanism 34 on the fastener. The elastic buffer mechanism 34 can be arranged between the lead screw nut 322 and the transmission member 33. When the lead screw nut 322 moves along the lead screw 321, the elastic buffer mechanism 34 will deform, and the elastic buffer mechanism 34 pushes the transmission member 33 to move through the elastic force.

[0084] By setting the driving member 32 to include the lead screw 321 and the lead screw nut 322, and connecting the lead screw nut 322 to the transmission member 33 through the elastic buffer mechanism 34, when the driving motor 31 drives the lead screw 321 to rotate, the lead screw nut 322 can move along the lead screw 321. The driving force output by the driving motor 31 is transmitted to the transmission member 33 through the elastic buffer mechanism 34. The cooperation between the lead screw 321 and the lead screw nut 322 is stable, and the number of rotation steps of the driving motor 31 corresponds to the moving distance of the lead screw nut 322 in the first direction, which is convenient for controlling the moving distance of the lead screw nut 322 and improving the accuracy when the moving table 2 moves.

[0085] Refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown in, in some embodiments, the lead screw nut 322 includes a nut body 323 and a connecting plate 324, and the connecting plate 324 is connected to the end of the nut body 323;

[0086] The nut body 323 is sleeved on the lead screw 321 and is threadedly connected to the lead screw 321. The transmission member 33 is sleeved on the nut body 323 and is connected to the connecting plate 324 through the elastic buffer mechanism 34.

[0087] Specifically, the nut body 323 can be selected as a cylindrical structure. The nut body 323 is arranged along the first direction, and a threaded hole is provided on the nut body 323 along the first direction, so that the lead screw 321 can be threadedly engaged and connected with the nut body 323 through the threaded hole. The connecting plate 324 can be selected to be arranged at the end of the nut body 323 close to the driving motor 31. The connecting plate 324 can be selected to extend radially along the lead screw 321. The connecting plate 324 can be selected to be an integral structure with the nut body 323. Of course, the connecting plate 324 can also be installed on the nut body 323 by using bolts. A through hole can be selected to be opened on the transmission member 33, and the lead screw 321 and the nut body 323 are arranged through the through hole. There can be a gap between the through hole on the transmission member 33 and the nut body, so as to facilitate the passage of the nut body 323. And when there is a deviation in the processing of the nut body 323, the transmission member 33 can also be sleeved on the nut body 323 through the through hole.

[0088] A through hole can be selected to be provided on the above-mentioned transmission member 33, and a support column is provided on the connecting plate 324, so that the support column passes through the through hole on the transmission member 33. The elastic buffer mechanism 34 can be selected to be connected to the end of the support column and the transmission member 33 respectively, so that the transmission member 33 and the connecting plate 324 are connected through the elastic buffer mechanism 34. The connecting plate 324 can be selected to be arranged on both sides of the nut body 323 along the radial direction of the lead screw 321, and the connecting plates 324 on both sides of the nut body 323 are connected to the transmission member 33 through the elastic buffer mechanism 34.

[0089] By providing that the lead screw nut 322 includes the nut body 323 and the connecting plate 324, and the transmission member 33 is connected to the connecting plate 324 through the elastic buffer mechanism 34, the lead screw 321 rotates to drive the nut body 323 to move, and the connecting plate 324 transmits the driving force to the transmission member 33 through the elastic buffer mechanism 34, so that the elastic buffer mechanism 34 can play a buffering role between the connecting plate 324 and the transmission member 33. When the user's finger is pinched, the elastic buffer mechanism 34 can play a buffering role in the force transmission between the transmission member 33 and the connecting plate 324, thereby slowing down the squeezing force received by the user's finger in a short time and protecting the user's finger.

[0090] Refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown in

[0091] Through holes are provided on both the above-mentioned driving member 32 and the transmission member 33 as mounting holes, so that the screw rod of the connecting bolt 341 passes through the through holes on the connecting plate 324 and the transmission member 33, and the connecting bolt 341 is fixedly connected to the driving member 32. A connecting nut 342 is installed at the end of the screw rod of the connecting bolt 341, so that the transmission member 33 is located between the driving member 32 and the connecting nut 342, and the connecting nut 342 restricts the elastic member 343 from disengaging from the screw rod. An elastic member 343 is sleeved on the screw rod of the connecting bolt 341. The elastic member 343 can be selected as a spring, and of course, it can also be selected as an elastic rubber ring. One end of the elastic member 343 on the screw rod is connected to the connecting nut 342, and the other end is connected to the surface of the transmission member 33 close to the nut.

[0092] It can be selected that the transmission member 33 is arranged on the side of the lead screw nut 322 away from the projection screen 8, so that when the lead screw nut 322 moves close to the projection screen 8, the elastic member 343 can play a buffering role. When the lead screw nut 322 moves away from the projection screen 8, the lead screw nut 322 can directly push the transmission member 33 to move.

[0093] When the lead screw nut 322 moves towards the transmission member 33, the lead screw nut 322 can abut against the transmission member 33 to push the transmission member 33. When the lead screw nut 322 moves away from the transmission member 33, the lead screw nut 322 compresses the elastic member 343 to drive the transmission member 33 to move. When the lead screw nut 322 moves close to the projection screen 8, the elastic member 343 can play a buffering role. When the lead screw nut 322 moves away from the projection screen 8, the lead screw nut 322 can directly push the transmission member 33 to move, ensuring that the driving force output by the driving motor 31 can make the moving platform 2 move accurately to its position, and avoiding the compression and elongation of the elastic member 343 from interfering with the accuracy of the moving position of the moving platform 2.

[0094] Refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown in, in some embodiments, the number of the elastic buffer mechanisms 34 is at least two, and at least two elastic buffer mechanisms 34 are arranged at intervals around the central axis of the lead screw nut 322.

[0095] Specifically, it can be selected that the number of the elastic buffer mechanisms 34 is two, and the two elastic buffer mechanisms 34 are respectively arranged on both sides of the central axis of the nut body 323 of the lead screw nut 322 along the radial direction of the lead screw 321, so that the elastic forces exerted by the two elastic buffer mechanisms 34 on the lead screw nut 322 and the transmission member 33 can be balanced. Of course, it can also be selected that the number of the elastic buffer mechanisms 34 is four, and the four elastic buffer mechanisms 34 are arranged at equal intervals around the central axis of the nut body 323.

[0096] By setting the number of the elastic buffer mechanisms 34 to be at least two, and the at least two elastic buffer mechanisms 34 are arranged at intervals around the central axis of the lead screw nut 322, so that the multiple elastic buffer mechanisms 34 can jointly play the role of transmitting the driving force and buffering. Moreover, the multiple elastic buffer mechanisms 34 are arranged at intervals around the central axis of the nut body 323, so that when the elastic buffer mechanisms 34 are compressed or stretched, the elastic forces applied to the transmission member 33 and the lead screw nut 322 are evenly distributed, ensuring the stability of the transmission member 33 moving with the lead screw nut 322.

[0097] Referring to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, an installation through-hole is formed in the transmission member 33, and the transmission member 33 is sleeved on the nut body 323 through the installation through-hole, and there is a clearance fit between the installation through-hole and the lead screw nut 322.

[0098] Specifically, a circular through-hole can be selected to be formed in the transmission member 33 as the installation through-hole. When the nut body 323 of the lead screw nut 322 is a cylinder, the diameter of the installation through-hole is larger than the diameter of the nut body 323 of the lead screw nut 322, and the nut body 323 is inserted into the installation through-hole, so that there is a clearance between the installation through-hole and the side surface of the nut body 323 of the lead screw nut 322.

[0099] Due to the clearance fit between the installation through-hole of the transmission member 33 and the lead screw nut 322, when the position of the transmission member 33 is inaccurate due to the accumulation of deviations during the installation of the components of the telescopic platform, because of the clearance fit between the installation through-hole and the lead screw nut 322, the nut body 323 can still pass through the installation through-hole, enabling the transmission member 33 to be sleeved on the nut body 323, avoiding the situation that the transmission member 33 cannot be installed with the nut body 323 due to the accumulation of position deviations during the installation of the components of the telescopic platform, and improving the adaptability of the transmission member 33.

[0100] Referring to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the transmission member 33 includes a transmission piece 331 and a connecting piece 332 connected to each other. The transmission piece 331 is connected to the active part 32, and the connecting piece 332 is connected to the moving platform 2.

[0101] Specifically, it can be selected that a sliding assembly 5 is arranged on the support base 1. The sliding assembly 5 can be selected as a sliding fit structure of a slider and a chute. The chute is arranged on the support base 1, and the slider is connected to the moving platform 2. Of course, the sliding assembly 5 can also be selected as a sliding fit structure of a slide bar and a slider. The slide bar is connected to the support base 1, the slider is slidably connected to the slide bar, and the moving platform 2 is connected to the slider.

[0102] The transmission piece 331 can be selected to be connected to the driving member 32, and an elastic buffer mechanism 34 is provided at the connection part between the transmission piece 331 and the driving member 32; the transmission piece 331 can be selected to be a rectangular or circular sheet body, and mounting through holes and through holes corresponding to the connection bolts 341 are provided on the transmission piece 331, so that the transmission piece 331 is connected to the driving member 32 through the elastic buffer mechanism 34; the connecting member 332 can be selected to be a rectangular plate or an L-shaped plate, one end of the connecting member 332 is connected to the sliding assembly 5, and the other end is connected to one side edge of the transmission piece 331. Of course, it can also be selected that one end of the connecting member 332 is connected to one side edge of the transmission piece 331, and the other end is connected to the moving table 2; bolts can be selected to connect the transmission piece 331 and the connecting member 332. Of course, it can also be selected that the transmission piece 331 and the connecting member 332 are of an integral structure.

[0103] The above-mentioned connecting member 332 can be selected to include a first plate body 333 and a second plate body 334. The first plate body 333 is arranged in the first direction, and both ends of the first plate body 333 in the first direction are respectively connected to the sliding assembly 5. The second plate body 334 is arranged in the middle of the first plate body 333, and the second plate body 334 extends towards the transmission piece 331 to be connected to one side edge of the transmission piece 331. Of course, it can also be selected that both ends of the first plate body 333 are connected to the surface of the moving table 2 facing the support base 1.

[0104] By setting the transmission member to include the transmission piece 331 and the connecting member 332, the transmission piece 331 is connected to the driving member 32, an elastic buffer mechanism 34 is provided at the connection part between the transmission piece 331 and the driving member 32, the connecting member 332 is connected to the moving table 2, and the connecting member 332 facilitates the connection between the transmission piece 331 and the moving table 2.

[0105] Referring to Figure 1 、 Figure 4 、 Figure 5 As shown in, in some embodiments, two sliding assemblies 5 are provided on the support base 1. The two sliding assemblies 5 are respectively arranged on both sides of the driving device 3. The transmission member is connected to one of the sliding assemblies 5, the moving table 2 is fixedly connected to the two sliding assemblies 5, and the connecting member 332 transmits power to the moving table 2 through the sliding assembly 5 fixedly connected to the connecting member 332.

[0106] Specifically, both sliding components 5 are connected to the moving platform 2. Thus, when the moving platform 2 is subjected to a driving force, it can move relative to the support base 1 through the two sliding components 5. The sliding components 5 can be selectively connected to the support base 1. The sliding components 5 are provided with sliding parts that can slide in the first direction, and the moving platform 2 is connected to the sliding parts so that the moving platform 2 can slide relative to the support base 1 in the first direction. The distances between the driving device 3 and the two sliding components 5 can be selectively equal. Of course, it can also be selectively set that the distance between the driving device 3 and one sliding component 5 is less than the distance between the driving device 3 and the other sliding component 5.

[0107] The above-mentioned sliding component 5 can be selectively composed of a slide rail 51 and two sliders 52. The slide rail 51 is arranged in the first direction, and the two sliders 52 are arranged at intervals on the slide rail 51 in the first direction. There is a set distance between the two sliders 52, and the transmission member 33 is connected to both sliders 52. Of course, it can also be selectively set that a straight rod in the first direction is arranged on the support base 1, and a sleeve or a slider is arranged on the straight rod, and the sleeve or the slider is connected to the moving platform 2, and the sleeve or the slider slides relative to the straight rod in the first direction, so that the moving platform 2 can slide relative to the support base 1 in the first direction.

[0108] When the above-mentioned moving platform 2 is pushed by an external force, one sliding component 5 applies a driving force to the transmission member 33. Since the sliding component 5 is located on the side of the transmission member 33, the position where the sliding component 5 applies a force to the transmission member 33 is the edge of the transmission member 33, so that the driving force on the transmission member 33 is distributed offset. Along the radial direction of the lead screw 321, the pressures exerted on the elastic buffer mechanism 34 or on the lead screw nut 322 on both sides of the transmission member 33 are different, so that the driving force received by the lead screw nut 322 is offset relative to the axis of the lead screw 321 after being equivalent. Compared with the situation where the driving force is equivalent and on the axis of the lead screw 321, a larger value of the driving force is required to push the lead screw nut 322 to move along the lead screw 321 after the driving force is equivalent and offset. And because the transmission member 33 has a certain deformation ability, the transmission member 33 will also tilt under the action of the offset driving force, which aggravates the offset situation of the driving force received by the lead screw nut 322 after being equivalent. Thus, after the driving motor 31 is powered off, a very large force on the moving platform 2 may cause the lead screw nut 322 to move. Thus, after the driving motor 31 is powered off, the cooperation between the lead screw nut 322 and the transmission member 33 achieves an effect similar to self-locking.

[0109] By providing that there are two sliding components 5 provided on the support base 1, and the two sliding components 5 are respectively provided on both sides of the driving device 3, and the moving platform 2 is fixedly connected to the two sliding components 5, the stability of the moving platform 2 during movement can be improved. The transmission member 33 is connected to one of the sliding components. The transmission member 33 transmits power to the moving platform 2 through the sliding component 5 fixedly connected to the transmission member 33. When the moving platform 2 is pushed, the transmission member 33 is subjected to a biasing force, and the lead screw nut 322 of the driving member 32 is also subjected to a biasing force. Compared with the situation where the lead screw nut 322 is subjected to a force equivalent to that on the axis of the lead screw 321, the lead screw nut 322 being subjected to a biasing force requires a greater force to be pushed. Therefore, the connection between the transmission member 33 and one sliding component 5 also achieves a self-locking effect through the cooperation of the lead screw nut 322 and the transmission member 33.

[0110] Referring to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown in

[0111] Specifically, the driving motor 31 is provided at one end of the support base 1 close to the projection screen 8. That is, the driving motor 31 is located at one end of the telescopic platform close to the projection screen 8. Since the controller 4 is usually also installed at one end of the support base 1 close to the projection screen 8, there is a certain installation space at one end of the support base 1 close to the projection screen 8 to place the controller 4. Installing the driving motor 31 at the position of the support base 1 close to the projection screen 8 can utilize the part of the installation space other than the controller 4. If the driving motor 31 is installed at the end of the support base 1 far from the projection screen 8, in order to make the support base 1 accommodate the driving motor 31, it is necessary to increase the dimension of the support base 1 in the first direction. Therefore, installing the driving motor 31 at the position of the support base 1 close to the projection screen 8 is beneficial to the miniaturization of the telescopic platform.

[0112] By providing that the driving motor 31 is provided at one end of the support base 1 close to the projection screen 8, the space originally available at the position of the support base 1 close to the projection screen 8 is utilized, which is beneficial to the miniaturization of the telescopic platform.

[0113] Referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, in some embodiments, an adjusting bolt 22 is provided on the mobile station 2. The adjusting bolt 22 is used to connect with the fixing hole on the projection host 7, so as to drive the projection host 7 to move along the axial direction of the adjusting bolt 22 by rotating the adjusting bolt 22.

[0114] It can be selected that the mobile station 2 includes a mobile station main body 21 and an adjusting bolt 22. The mobile station main body 21 is movably arranged on the support base 1 and is connected with the transmission member 33. The adjusting bolt 22 is arranged on the mobile station main body 21. The projection host 7 is provided with a fixing hole for wall mounting. The adjusting bolt 22 is connected with the fixing hole. By rotating the adjusting bolt 22, the connection depth between the adjusting bolt 22 and the fixing hole of the projection host 7 is adjusted, so as to drive the axial movement of the adjusting bolt 22.

[0115] Among them, it can be selected that the adjusting bolt 22 includes a heightening bolt 221 and a locking bolt 224;

[0116] An adjusting hole 211 is provided on the mobile station main body 21. The heightening bolt 221 is arranged on the side of the mobile station main body 21 away from the support base 1. One end of the heightening bolt 221 is used for threaded connection with the fixing hole of the projection host 7. The other end of the heightening bolt 221 is inserted into the adjusting hole 211 and is provided with a locking screw hole. The locking bolt 224 is arranged on the side of the mobile station main body 21 close to the support base. The locking bolt 224 passes through the adjusting hole 211 and is threadedly connected with the locking screw hole. By rotating the heightening bolt 221, the insertion depth of the locking bolt 224 in the locking screw hole is adjusted.

[0117] Specifically, it can be selected that the mobile station main body 21 is a rectangular panel. The projection host 7 is placed on the mobile station main body 21. The adjusting hole 211 can be selected as a through hole on the mobile station main body 21. The adjusting hole 211 can be selected as an oblong hole extending along the direction parallel to the mobile station main body 21. Of course, the adjusting hole 211 can also be selected as a rectangular through hole. The end of the heightening bolt 221 can move in the adjusting hole 211, so that the heightening bolt 221 can adjust its position on the mobile station main body 21, indicating that the heightening bolt 221 can adapt to projection hosts 7 of different sizes.

[0118] The number of the above-mentioned adjusting bolts 22 and adjusting holes 211 can be selected as multiple. The multiple adjusting holes 211 can be selected to be arranged at intervals on the mobile station main body 21. The number of the adjusting bolts 22 can be selected to be equal to the number of the adjusting holes 211, so that each adjusting hole 211 is provided with an adjusting bolt 22. Of course, the number of the adjusting bolts 22 can also be selected to be less than the number of the adjusting holes 211. For example, the number of the adjusting holes 211 is selected as ten, and the number of the adjusting bolts 22 is selected as two. The two adjusting bolts 22 can be respectively connected with two of the ten adjusting holes 211.

[0119] Near the end of the screw rod of the above-mentioned height-adjusting bolt 221, an adjusting plate 222 is provided. The adjusting plate 222 can be selected as a flat plate. The adjusting plate 222 extends along the radial direction of the height-adjusting bolt 221. One end of the screw rod of the height-adjusting bolt 221 without the adjusting plate 222 is used for bolt connection with the wall-mounted hole of the projection host 7, so that the user can apply a driving force to the adjusting plate 222 with a finger, and the height-adjusting bolt 221 can be rotated, so as to conveniently adjust the connection length between the bolt of the height-adjusting bolt 221 and the wall-mounted hole of the projection host 7. One end of the height-adjusting bolt 221 close to the adjusting plate 222 is used for inserting into the adjusting hole 211, and one end of the height-adjusting bolt 221 far from the adjusting plate 222 is used for connection with the fixing hole of the wall-mounted projection host 7.

[0120] The end of the above-mentioned height-adjusting bolt 221 can be selected to pass through the adjusting hole 211. Of course, it can also be selected that the end of the height-adjusting bolt 221 is located inside the adjusting hole 211. A locking screw hole is provided at the end of the height-adjusting bolt 221 close to the adjusting hole 211. The height-adjusting bolt 221 and the locking bolt 224 are respectively arranged on both sides of the moving platform main body 21. A gasket 223 can be selected to be arranged on one side of the moving platform main body 21 close to the locking bolt 224. After the locking bolt 224 passes through the gasket 223, the screw rod of the locking bolt 224 is connected to the locking screw hole of the height-adjusting bolt 221. By tightening the locking bolt 224, the locking bolt 224 is closely attached to the height-adjusting bolt 221 through the gasket 223, so that the position of the height-adjusting bolt 221 on the moving platform main body 21 is fixed.

[0121] By providing the moving platform 2 including the moving platform main body 21 and the adjusting bolt 22, the adjusting bolt 22 is arranged on the moving platform main body 21 and is used for connection with the fixing hole of the projection host 7. It is realized that the height position of the projection host 7 on the moving platform main body 21 can be adjusted by adjusting the connection length between the adjusting bolt 22 and the fixing hole of the projection host 7. The adjusting bolt 22 includes a height-adjusting bolt 221, a locking bolt 224 and a gasket 223. The height-adjusting bolt 221 and the locking bolt 224 are respectively arranged on both sides of the moving platform main body 21. An adjusting hole 211 is provided on the moving platform main body 21. The height-adjusting bolt 221 and the adjusting hole 211 of the locking bolt 224 are connected to each other. The gasket 223 is arranged between the end of the locking bolt 224 and the moving platform main body 21. After the locking bolt 224 and the height-adjusting bolt 221 are tightened, the positions of the height-adjusting bolt 221 and the locking bolt 224 on the moving platform main body 21 are kept stable by pressure.

[0122] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in, in some embodiments, the telescopic platform applied to the ultra-short-throw projection device further includes a controller 4. The controller 4 is electrically connected to the driving motor 31 and is used to control the start and stop of the driving motor 31.

[0123] Further, the controller 4 is further configured to control the driving motor 31 to stop working when the current of the driving motor 31 is greater than the set current. With this setting, when the user's finger is pinched between the mobile station 2 and the support base 1, the driving motor 31 will have a problem similar to stalling, resulting in a rapid increase in the current of the driving motor 31. Even if the user does not withdraw the hand from the gap between the mobile station 2 and the support base 1 in time, the monitoring of the current by the controller 4 can prevent the user's finger from being further injured.

[0124] Specifically, the controller 4 can be selected as a circuit board. Of course, it can also be selected as a chip or a microcomputer. When the mobile station 2 moves from the extended position towards the rear end of the support base 1 and returns to the retracted position, if there is a foreign object in the space between the baffle of the mobile station 2 and the support base 1 or the user's finger extends into the space between the baffle of the mobile station 2 and the support base 1, when the driving motor 31 drives the mobile station 2 to move towards the direction close to the projection screen 8, the mobile station 2 will first contact the foreign object or the user's finger, causing the movement of the mobile station 2 to be resisted, and the elastic buffer mechanism 34 will be further compressed or stretched, increasing the force borne by the transmission member 33. At this time, the driving motor 31 is in a working state similar to stalling, causing the output current of the driving motor 31 to increase. The value of the set current can be selected as the safety current of the driving motor 31. Of course, the value of the set current can also be set according to the actual situation. When the output current of the driving motor 31 increases to be greater than the set current, the driving motor 31 stops working, so that the mobile station 2 will not continue to apply pressure to the user's finger or foreign object, preventing the user from being pinched even if the finger cannot be withdrawn from between the support base 1 and the mobile station 2 in time.

[0125] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in

[0126] Specifically, a USB interface can be selected on the telescopic platform, or a data transmission port with a common specification can also be selected. The electrical connection port can be selected to be connected to the controller 4, and the projection host 7 can be selected to be connected to the electrical connection port using a data cable, so that the signal received by the projection host 7 can be transmitted to the controller 4 of the telescopic platform through the electrical connection port. The remote control adapted to the projection host 7 can send a signal to the projection host 7, and the projection host 7 performs a projection operation according to the signal sent by the remote control. It can be selected that there is a module corresponding to the telescopic platform in the operating system of the projection host 7, so that the signal received by the projection host 7 from the remote control can be transmitted to the controller 4 of the telescopic platform, and the remote control can also control the telescopic platform.

[0127] The above-mentioned projection host 7 can be selected to project a progress bar onto the projection screen 8. When the progress bar is 0%, it means that the mobile station 2 is in the retracted position. When the progress bar is 100%, it means that the mobile station 2 is at the limit position of moving relative to the support base 1. Each position of the mobile station 2 between the retracted position and the limit position corresponds to the progress bar, so that the distance that the mobile station 2 moves out from the retracted position can be intuitively reflected to the user, facilitating the user to control the movement of the mobile station 2. Of course, it can also be selected to project the specific value of the distance that the mobile station 2 extends from the retracted position onto the projection screen 8. When the driving member 32 is a lead screw 321 and a lead screw nut 322, the moving distance value of the mobile station 2 can be calculated by the number of turns of the lead screw 321 and the angle of the thread on the lead screw 321. When the driving member 32 is a gear and a rack, the moving distance value of the mobile station 2 can be obtained by calculating the tooth pitch of the gear and the rack.

[0128] The above-mentioned set projection position can be selected as the position where the projection image of the projection host 7 on the projection screen 8 has the best projection effect, and the set projection position can be used as the extended position. When the mobile station 2 moves to the extended position, the remote control controls the mobile station 2 to stop moving, and the controller 4 of the telescopic platform is used to record this position. The operation of recording the position can be selected as the controller 4 records the distance that the mobile station 2 needs to move from the retracted position to the extended position, that is, the number of steps that the driving motor 31 needs to rotate from the retracted position to the extended position. When the telescopic platform is shut down, the mobile station 2 will return to the retracted position. When the telescopic platform is powered on, since the controller 4 records the distance required to move to the extended position, the user can select the recorded extended position and then the driving motor 31 drives the mobile station 2 to move the corresponding distance of the recorded position, so that the driving motor 31 drives the mobile station 2 to move to the extended position, and the user does not need to manually debug each time the telescopic platform is powered on, improving the user experience.

[0129] By providing an electrical connection port on the telescopic platform, the telescopic platform is electrically connected to the projection host 7 through the electrical connection port, enabling the projection host 7 to project the real-time position of the relative telescopic movement of the mobile station 2 with respect to the support base 1 onto the projection screen 8, facilitating the user to intuitively recognize the distance of movement of the mobile station 2 and enabling the user to better adjust the position of the mobile station 2. The remote controller adapted to the projection host 7 controls the relative telescopic movement of the mobile station 2 with respect to the support base 1, and the controller 4 can record the extended position of the mobile station 2. After the telescopic platform records the position, each time it is used, the controller calls the recorded position to control the drive motor 31 to drive the mobile station 2 to automatically move to the recorded extended position, avoiding the need for the user to manually adjust the position of the mobile station 2 each time the telescopic platform is used and enhancing the user experience.

[0130] Referring to Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in some embodiments, a detector 61 is provided on the support base 1, the detector 61 is electrically connected to the controller 4, and an induction member 62 is provided on the transmission member 33; the induction member 62 is configured to move with the transmission member 33 under the drive of the drive motor 31. When the transmission member 33 drives the mobile station 2 to move to the retracted position, the induction member 62 triggers the detector 61, and the controller 4 receives the detection signal of the detector 61 and controls the drive motor 31 to stop operating; the controller 4 is further configured to record the output steps of the drive motor 31 when controlling the mobile station 2 to move from the retracted position towards the extended position, and to control the drive motor 31 to stop working when the output steps are greater than the set steps.

[0131] Specifically, the detector 61 can be selected as a photoelectric gate or a laser detector, and the induction member 62 can be selected as a rectangular plate provided on the transmission member 33. When the mobile station 2 is in the retracted position, the position of the transmission member 33 will cause the induction member 62 to cover the detector 61, triggering the detector 61 to send a signal to the controller 4, causing the drive motor 31 to stop working, thereby ensuring that when the mobile station 2 moves to the retracted position, the drive motor 31 stops working and the mobile station 2 is stably held in the drive position.

[0132] When the above-mentioned telescopic platform shuts down each time, the controller 4 can be selected to control the drive device 3 to provide a driving force to the mobile station 2, causing the mobile station 2 to move towards the retracted position. After the mobile station 2 moves to the position where the induction member 62 covers the detector 61, the drive device 3 stops working, thereby ensuring that the mobile station 2 can be accurately and stably located at the retracted position each time the telescopic platform shuts down, that is, each time the telescopic platform starts, the mobile station 2 starts to move from the retracted position.

[0133] The output step number of the above-mentioned driving device 3 is the output step number of the driving motor 31 in one direction. When the driving motor 31 outputs torque force in one direction, the moving platform 2 can move from the retracted position towards the extended position. When the driving motor 31 outputs torque in the other direction, the moving platform 2 can move from the extended position to the retracted position. The output step number of the driving motor 31 corresponds to the moving distance of the moving platform 2. The value of the set step number is set according to the length of the support base 1 in the first direction or the length of the lead screw 321 in the driving member 32. As long as the output step number of the driving motor 31 is less than or equal to the set step number, the transmission member 33 will not disengage from the end of the lead screw 321 away from the driving motor 31, or the moving platform 2 will not move too far in the first direction to cause part of the structure of the moving platform 2 to collide with the support base 1. The value of the set step number can be selected according to the actual situation, and the maximum distance that the moving platform 2 moves relative to the retracted position is limited by the value of the set step number.

[0134] After the above-mentioned telescopic platform is started, as long as the number of steps output by the driving motor 31 in one direction is greater than the set step number, the driving motor 31 will stop working, so that the moving platform 2 stops moving. By setting the set step number, the maximum moving distance of the moving platform 2 is limited, and the effect of limiting the maximum moving distance of the moving platform 2 in the first direction can be achieved without setting the structure of the detection device at the end of the support base 1 away from the driving motor 31 in the first direction.

[0135] By setting a detector 61 on the support base 1, the detector 61 is electrically connected to the controller 4, and an induction member 62 is provided on the transmission member 33. When the moving platform 2 moves to the retracted position, the induction member 62 can correspond to the detector 61 and emit a signal to the controller 4, so that the controller 4 controls the driving motor 31 to stop working, ensuring that the moving platform 2 automatically stops moving after moving to the retracted position, and avoiding damage caused by the lead screw nut 322 colliding with the driving motor 31 when the moving platform 2 retracts with too long a moving distance, ensuring the accuracy and stability of the moving platform 2 when it returns to the retracted position; the output step number of the driving motor 31 corresponds to the moving distance of the moving platform 2 in the first direction. By setting the set step number, the controller 4 can limit the maximum moving distance of the moving platform 2 relative to the retracted position according to the set step number, avoiding the lead screw nut 322 disengaging from the lead screw 321 or part of the structure of the moving platform 2 colliding with the support base 1 due to the moving platform 2 moving too far relative to the retracted position, and improving the use experience of the telescopic platform.

[0136] When the retractable platform provided by the embodiment of the present disclosure is specifically used, the support base 1 is installed on the plane of a TV cabinet or other furniture, the projection host 7 is placed on the mobile platform main body 21, the screw rod of the height-adjusting bolt 221 is threadedly connected to the wall-hanging hole of the projection host 7, and the adjusting plate 222 of the height-adjusting bolt 221 is rotated to adjust the connection length between the projection host 7 and the screw rod of the height-adjusting bolt 221, so as to adjust the posture of the projection host 7. The projection host 7 is connected to the electrical connection port of the retractable platform, and the projection host 7 is controlled to be turned on and the retractable platform is started by using a remote control. The mobile platform 2 is in the retracted position when the retractable platform is turned off.

[0137] A signal is sent to the controller 4 by using the remote control, and the controller 4 controls the driving motor 31 to start. The lead screw 321 rotates, causing the lead screw nut 322 to move along the lead screw 321 in a direction away from the driving motor 31. The transmission member 33 moves along with the lead screw nut 322 driven by the elastic buffer mechanism 34, and the sliding assembly 5 moves along with the transmission member 33, so that the mobile platform 2 moves together with the transmission member 33. The mobile platform 2 moves from the retracted position to the extended position, and the projection host 7 projects on the projection screen 8 in real time the distance that the mobile platform 2 moves relative to the retracted position. When the projection of the projection host 7 on the projection screen 8 has the best projection effect after the mobile platform 2 moves, the remote control sends a signal to make the controller 4 control the driving motor 31 to stop working. The position at this time is the extended position, and the controller 4 records the extended position and the distance required to move to the extended position, and the projection host 7 performs projection work.

[0138] During the process of the mobile platform 2 extending from the retracted position, if the number of steps output by the driving motor 31 to drive the mobile platform 2 to move away from the retracted position is greater than the set number of steps, the controller 4 controls the driving motor 31 to stop working, and the remote control continues to output a signal to make the mobile platform 2 move away from the retracted position, and the controller 4 keeps the driving motor 31 stopped.

[0139] After the projection host 7 finishes projection, the remote control sends a shutdown signal to the retractable platform and the projection host 7. The projection host 7 shuts down, and the controller 4 controls the driving motor 31 to output torque, causing the lead screw 321 to rotate and driving the lead screw nut 322 to move in a direction close to the driving motor 31. The lead screw nut 322 drives the transmission member 33 to move together through the elastic buffer mechanism 34, and the transmission member 33 drives the sliding assembly 5 to move, so that the mobile platform 2 moves together with the transmission member 33 in a direction close to the driving motor 31. After the transmission member 33 moves until the sensing member 62 thereon corresponds to the detector 61 on the support base 1, the mobile platform 2 returns to the retracted position, and the driving motor 31 stops working; when the retractable platform is started again, a signal can be sent to the controller 4 to make the controller 4 drive the driving motor 31 to drive the mobile platform 2 to move according to the recorded extended position, so that the mobile platform 2 automatically moves to the recorded extended position.

[0140] During the process of the mobile station 2 moving from the extended position to the retracted position, if the user's finger extends into the gap between the mobile station 2 and the support base 1, the mobile station 2 first contacts the user's finger during the movement. Since the user's finger has a certain hardness, the resistance to the movement of the mobile station 2 towards the retracted position increases. At this time, the elastic buffer mechanism 34 is further gradually compressed, the reduction speed of the distance between the mobile station 2 and the support base 1 slows down, the resistance on the lead screw nut 322 also increases, and the current output by the drive motor 31 gradually increases. When the controller detects that the current output by the drive motor 31 is greater than the set current, the controller controls the drive motor 31 to stop working, so that the mobile station 2 stops moving to protect the user's finger.

[0141] During the process of the user's finger being pinched, the elastic buffer mechanism 34 plays a buffering role, slowing down the reduction speed of the distance between the mobile station 2 and the support base 1 when the user's finger is pinched, and timely stopping the operation of the drive motor 31 by comparing the output current of the drive motor 31 with the set current, so that the user has a reaction time to withdraw the finger from the gap between the mobile station 2 and the support base 1.

[0142] Refer to Figure 13 and Figure 14 As shown, the embodiments of the present disclosure also provide an ultra-short throw projection device, including a projection host 7, a projection screen 8, and a telescopic platform applied to the ultra-short throw projection device as in any of the above embodiments.

[0143] Specifically, the projection host 7 is carried on the mobile station 2 of the telescopic platform, the projection port of the projection host 7 faces the projection screen 8, and the mobile station 2 drives the projection host 7 to move towards or away from the projection screen 8.

[0144] By installing the projection host 7 on the mobile station 2, the mobile station 2 can drive the projection host 7 to move to adjust the projection distance of the projection host 7 on the projection screen 8, and the telescopic platform has an anti-pinch function, which can avoid pinching the user's finger during the process of the mobile station 2 of the telescopic platform returning to the retracted position.

[0145] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0146] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic platform for ultra-short-throw projection equipment, characterized in that: include: A support base, wherein a driving device is arranged on the support base; a moving platform, movably arranged on the supporting seat and connected to the driving device, used to carry the projection host of the ultra-short-throw projection device, and to drive the projection host to move to an extended position when the projection host is turned on to adjust the distance between the projection host and the projection screen, and to drive the projection host to move to a retracted position when the projection host is turned off; Wherein, the driving device comprises a driving motor, an active member and a transmission member, the output end of the driving motor is connected to the active member, the active member is connected to the transmission member, and the transmission member is connected to the mobile platform, so as to drive the mobile platform to switch between the extended position and the retracted position through the transmission member; An elastic buffer mechanism is provided at the connection position between the active member and the transmission member, so as to realize elastic connection between the active member and the transmission member through the elastic buffer mechanism.

2. The telescopic platform for ultra-short-throw projection equipment according to claim 1, characterized in that: Mounting holes are correspondingly provided on the active member and the transmission member, and the active member is connected to the transmission member via a fastener penetrating through the mounting hole. The elastic buffer mechanism is sleeved on the fastener and elastically supported between one of the active member and the transmission member and the fastener, or elastically supported between the active member and the transmission member.

3. The telescopic platform for ultra-short-throw projection equipment according to claim 2, characterized in that: The active part includes a screw and a screw nut, the screw is connected to the output end of the drive motor, the screw nut is sleeved on the screw and threadedly connected to the screw, and the drive motor drives the screw nut to perform reciprocating linear motion on the screw; The mounting holes are correspondingly arranged on the screw nut and the transmission member, the screw nut is connected to the transmission member via the fastener penetrating the mounting hole, the elastic buffer mechanism is sleeved on the fastener, and is elastically supported between the screw nut and one of the transmission member and the fastener, or is elastically supported between the screw nut and the transmission member.

4. The telescopic platform for ultra-short-throw projection equipment according to claim 3, characterized in that: The fastener comprises a connecting bolt and a connecting nut, one end of the connecting bolt passes through the screw nut and the transmission member and is threadedly connected with the connecting nut, and the elastic buffer mechanism comprises an elastic member, the elastic member is sleeved on the connecting bolt and elastically supported between the connecting nut and the transmission member; And / or, the number of the elastic buffer mechanisms is at least two, and at least two of the elastic buffer mechanisms are arranged at intervals around the central axis of the screw nut; And / or, a mounting through hole is provided on the transmission member, and the transmission member is sleeved on the lead screw nut through the mounting through hole, and a clearance fit is formed between the mounting through hole and the lead screw nut.

5. The telescopic platform for ultra-short-throw projection equipment according to claim 1, characterized in that: The transmission member comprises a transmission plate and a connecting member connected to each other, the transmission plate is connected to the active member, and the connecting member is connected to the moving platform.

6. The telescopic platform for ultra-short-throw projection equipment according to claim 5, characterized in that: Two sliding assemblies are arranged on the support seat, and the two sliding assemblies are respectively arranged on both sides of the driving device. The connecting member is connected to one of the sliding assemblies, and the moving platform is fixedly connected to the two sliding assemblies. The connecting member transmits power to the moving platform through the sliding assembly fixedly connected to the connecting member.

7. The telescopic platform for ultra-short-throw projection equipment according to any one of claims 1 to 6, characterized in that: The driving motor is arranged at one end of the supporting base close to the projection screen; And / or, an adjusting bolt is provided on the movable platform, and the adjusting bolt is used to be connected with a fixing hole on the projection host, so that the projection host is driven to move along the axial direction of the adjusting bolt by rotating the adjusting bolt.

8. The telescopic platform for ultra-short-throw projection equipment according to any one of claims 1 to 6, characterized in that: It also includes a controller, which is electrically connected to the drive motor and is used to control the start and stop of the drive motor. The controller is used to control the drive motor to stop working when the current of the drive motor is greater than a set current.

9. The telescopic platform for ultra-short-throw projection equipment according to claim 8, characterized in that: The telescopic platform is provided with an electrical connection port, and the telescopic platform is electrically connected to the projection host through the electrical connection port, so that the telescopic movement of the mobile platform relative to the support base can be controlled by a remote controller adapted to the projection host, and the telescopic position of the mobile platform relative to the support base can be displayed in real time on the projection screen; When the movable platform moves relative to the support base to make the projection host move relative to the projection screen to a set projection position, the remote controller controls the driving motor to stop running, and the controller records the position of the movable platform at this time as the extended position of the movable platform.

10. An ultra-short-throw projection device, characterized in that: It comprises a projection host, a projection screen and a telescopic platform for ultra-short-throw projection equipment as described in any one of claims 1 to 9, wherein the projection host is carried on a moving platform of the telescopic platform, the projection port of the projection host faces the projection screen, and the moving platform drives the projection host to move toward or away from the projection screen.

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