Frameless lift and its installation structure

Abstract

The present invention relates to the technical field of display screen lifting equipment, and specifically discloses a frameless lift and an installation structure thereof, the frameless lift comprises a shell, the upper end surface of the shell is provided with an opening, a cover plate is movably provided at the opening, a lifting frame capable of lifting and lowering is also provided in the shell, and the lifting frame is characterized in that a linkage mechanism is provided between the lifting frame and the cover plate, the linkage mechanism comprises an inclined slide rail and a sliding block, the sliding block is connected with a buffer assist spring for providing a downward sliding pulling force for the sliding block and a traction rope for providing an upward sliding pulling force for the sliding block, the traction rope sleeve is provided with a limit block, the lifting frame is provided with a synchronous pressing plate for pressing down the limit block so that the traction rope can slide up and down synchronously with the lifting frame, a steering member is provided on the side of the inclined slide rail, and the traction rope is connected to the sliding block after being turned via the steering member. The lift of the present invention has a simple structure, a small table opening, and can achieve a frameless installation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen lifting equipment, and in particular to a frameless lift and an installation structure thereof. Background Art

[0002] In the prior art, conference rooms, training rooms and other places are often equipped with display screens. In order to prevent the display screens from being idle for a long time and collecting dust or occupying table space, the display screens are often installed in a lift that can lift the display screen up and down the table. The patent (patent application number: CN201711414438.4) discloses an ultra-thin elevator and an integrated independent elevator, including a chassis, the width of the chassis is D1, the size range of D1 is 40mm≤D1≤47mm, and the elevator has the following defects: 1) Although the elevator can realize the rise or fall of the display screen to the flap, so that the flap cooperates to open or close the window, the flap adopts a connecting rod type rigid drive, the structure is complex, and the operation is not smooth; 2) The installation method of the elevator is: a window for the display screen to extend out is opened on the upper end surface of the chassis of the elevator, and a through hole matching the size of the upper end surface of the chassis is opened on the table top, and then the entire upper end surface of the elevator is extended into the through hole and made flush with the horizontal plane of the table top, and the elevator is fixed from the bottom by screws. Therefore, there is usually a frame at the opening of the table top (that is, the other wall surfaces of the upper end surface except the window), and the opening area is still large, which affects the use and aesthetics of the table top. Summary of the invention

[0003] The purpose of the present invention is to provide a frameless lift and its installation structure in view of the existing technical status. The lift of the present invention has a simple structure, a small table opening, and can achieve a frameless installation effect.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] The invention discloses a frameless lift, comprising a shell, an upper end surface of the shell is provided with an opening, a cover plate is movably provided at the opening, a lifting frame capable of performing lifting action is further provided in the shell, and the lifting frame is characterized in that a linkage mechanism is provided between the lifting frame and the cover plate, which is used to drive the cover plate to perform opening and closing movements synchronously with the lifting of the lifting frame. In the invention, the linkage mechanism can drive the cover plate to translate synchronously obliquely downward and away from the opening as the lifting frame rises, and open the opening, and can also drive the cover plate to translate synchronously obliquely upward and block the opening as the lifting frame descends, and close the opening. The linkage mechanism comprises an inclined slide rail arranged along an inclined direction and a sliding block slidably arranged on the inclined slide rail, the inclined slide rail is arranged at both sides of the interior of the shell, the sliding block is connected with a buffer assist spring for providing a downward sliding pulling force for the sliding block and a pulling rope for providing an upward sliding pulling force for the sliding block, the pulling rope sleeve is provided with a limit block, the lifting frame is provided with a synchronous pressing plate for pressing down the limit block so that the pulling rope can slide up and down synchronously with the lifting frame, a steering member is provided on the side of the inclined slide rail, and the pulling rope is connected to the sliding block after being turned by the steering member.

[0006] Preferably, a fixed ear plate is provided under the shell, and a limiting ear plate is provided under the steering member. The limiting ear plate and the synchronous pressure plate are both provided with limiting guide holes for limiting and guiding the pulling rope. One end of the pulling rope is connected to the fixed ear plate, and the other end passes through the limiting guide holes on the synchronous pressure plate and the limiting ear plate in turn, and is connected to the upper end of the sliding block after being turned through the steering member. The limiting block is arranged between the fixed ear plate and the synchronous pressure plate to ensure that the limiting blocks on the synchronous pressure plate and the pulling rope are always arranged in the same vertical direction.

[0007] Preferably, an auxiliary spring is provided above the fixed ear plate, and the auxiliary spring is sleeved outside the pulling rope. When the lifting frame rises, the auxiliary spring stretches to provide assistance to the buffer assisting spring.

[0008] Preferably, a slide groove is provided on the side of the inclined slide rail, and the sliding block includes a sliding end sliding along the inclined slide rail and a connecting end for connecting to the cover plate, a transition section passing through the slide groove is provided between the sliding end and the connecting end, and a cover plate support arm arranged in a vertical direction is provided between the connecting end and the cover plate.

[0009] Preferably, the axis of the buffer assist spring is parallel to the inclined slide rail, a fixing block for fixing the buffer assist spring is provided on the side of the inclined slide rail, and both ends of the buffer assist spring are respectively connected to the fixing block and the sliding block.

[0010] Preferably, a display screen is rotatably connected to the lifting frame, and an angle adjustment mechanism for adjusting the inclination angle of the display screen is provided between the lifting frame and the display screen, the angle adjustment mechanism comprises a fixed frame, a screen rotating shaft and a driving shaft for driving the screen rotating shaft to rotate, the screen rotating shaft and the driving shaft are rotatably arranged on the fixed frame, a driven fixed wheel and an active fixed wheel are respectively sleeved on the screen rotating shaft and the driving shaft, a first connecting rod and a second connecting rod parallel to each other are connected between the driven fixed wheel and the active fixed wheel, both ends of the first connecting rod and the second connecting rod are respectively hinged to the driven fixed wheel and the active fixed wheel, the driving shaft is connected to a driving assembly for driving the driving shaft to rotate, the driving shaft rotates when driven by the driving assembly, the screen rotating shaft rotates accordingly, and the display screen rotates around the screen rotating shaft as the axis, thereby realizing the adjustment of the inclination angle of the display screen.

[0011] Preferably, the drive assembly includes a first reducer and a second reducer respectively connected to drive motors, the first reducer and the second reducer are both double-axis worm gear reducers, the first reducer and the second reducer are connected by an elastic coupling, the elastic coupling can eliminate the gap between the reducers at both ends, improve the rotation precision and smoothness, the output shafts of the first reducer and the second reducer far away from each other are respectively connected with rigid couplings, and the drive shaft and the rigid coupling are connected to each other by a damping shaft.

[0012] Preferably, the angle adjustment mechanism is also provided with a detection component for detecting the current tilt state of the display screen, the detection component includes a first photoelectric sensor and a second photoelectric sensor, the first photoelectric sensor and the second photoelectric sensor are respectively provided with a first baffle plate and a second baffle plate for blocking their light signals, the first baffle plate and the second baffle plate are annular plates with notches, and are concentrically arranged with the driving shaft, and the notches of the first baffle plate and the second baffle plate do not completely overlap; the tilt state includes a forward tilt state, a backward tilt state and a vertical state, when the display screen is in a vertical state, the light signals of the first photoelectric sensor and the second photoelectric sensor are blocked at the same time, when the display screen is in a forward tilt state, only the light signal of the first photoelectric sensor is blocked, and when the display screen is in a backward tilt state, only the light signal of the second photoelectric sensor is blocked, through the detection component, it is possible to judge whether the display screen is in a vertical state before storage, so as to facilitate resetting the display screen according to the judgment result.

[0013] Preferably, the lifting frame is connected to a lifting mechanism, the lifting mechanism includes a lifting motor and a pulley transmission assembly, the pulley transmission assembly includes a driving wheel, a synchronous wheel and a conveyor belt sleeved between the driving wheel and the synchronous wheel, the driving wheel is sleeved on the output shaft of the lifting motor, and the conveyor belt is connected to the lifting frame through a conveyor belt pressing block.

[0014] The present invention also provides an installation structure for the above-mentioned frameless elevator, characterized in that it includes a table top arranged above the elevator, the upper end surface includes a mounting ring surface arranged at the edge of the upper end surface, the inner side of the mounting ring surface extends upward and bends to form a convex wall for installation positioning and for movement of the cover plate, the interior of the convex wall is hollow, and an opening is arranged on the upper surface of the convex wall, a groove for accommodating the convex wall is opened at the bottom of the table top, a notch matching the opening is penetrated at the bottom of the groove, the table top opening is small, and the elevator is installed without a frame.

[0015] The beneficial effects of the present invention are:

[0016] 1) The present invention realizes the linkage movement of the cover plate and the lifting frame through a pulling rope, a limit block, and a synchronous pressure plate. The structure is simple, and the cover plate is driven by a flexible drive such as a pulling rope and a buffer assist spring, and the linkage mechanism operates smoothly.

[0017] 2) The present invention connects the driving shaft and the screen shaft through a parallelogram transmission structure, and the display screen is driven to rotate around the screen shaft through the rotation of the driving shaft, so that the inclination angle of the display screen can be adjusted.

[0018] 3) The present invention can determine whether the display screen is in a vertical state before storage through the detection component, and reset the display screen to a vertical state based on the judgment result, without the need for manual angle adjustment. At the same time, it can effectively prevent the display screen from colliding with the slots and openings during the storage process, making the storage of the display screen more convenient, smoother and safer.

[0019] 4) The present invention only opens a groove on the table top that matches the size of the opening, and combines the improvements on the upper end surface of the elevator and the bottom of the table top to effectively achieve the effect of a small table top opening and a frameless installation of the elevator, which is beneficial to the effective use of the table top space and makes the table top neat and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the linkage assembly of the present invention.

[0021] Figure 2 Another structural schematic diagram of the present invention.

[0022] Figure 3 for Figure 2 A partial enlarged view of .

[0023] Figure 4 This is a schematic diagram of the installation structure of the table and the lift.

[0024] Figure 5 This is a schematic diagram of the structure of the bottom of the table. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0026] Example 1

[0027] See also Figure 1-Figure 3 As shown, the present invention discloses a frameless lift, comprising a shell 1, an upper end surface 11 of the shell 1 is provided with an opening 111 for a display screen to be exposed on the upper end surface 11 of the shell 1, a cover plate 2 is movably provided at the opening 111, a lifting frame 3 capable of lifting and lowering is further provided in the shell 1, the display screen is provided on the lift and can be lifted and lowered along with the lifting frame 3, a linkage mechanism 4 is provided between the lifting frame 3 and the cover plate 2 for driving the cover plate 2 to perform opening and closing movements synchronously along with the lifting and lowering of the lifting frame 3, in the present invention, the linkage mechanism 4 can drive the cover plate 2 to translate obliquely downward synchronously along with the lifting of the lifting frame 3, away from the opening 111, to open the opening 111, and can also drive the cover plate 2 to translate obliquely upward synchronously along with the descending of the lifting frame 3, to block the opening 111, to close the opening 111, the linkage mechanism 4 comprises an inclined slide rail 41 arranged along an inclined direction and a sliding block 42 slidably arranged on the inclined slide rail 41, the inclined slide rail 41 is arranged on both sides of the interior of the shell 1, and the inclined arrangement of the inclined slide rail 41 The arrangement is to avoid the movement of the cover plate 2 and the movement of the display screen from interfering with each other and colliding. The sliding block 42 is connected with a buffer assist spring 43 for providing a downward sliding pulling force for the sliding block 42 and a pulling rope 44 for providing an upward sliding pulling force for the sliding block 42. In this embodiment, the pulling rope 44 is a steel wire rope, and a limit block 45 is provided on the pulling rope 44. The limit block 45 and the pulling rope 44 do not slide relative to each other. The lifting frame 3 is provided with a synchronous pressing plate 46 for pressing down the limit block 45 so that the pulling rope 44 can slide up and down synchronously with the lifting frame 3. In this embodiment, the limit block 45 is a rubber columnar body fixed to the pulling rope 44, which is conducive to the fit between the limit block 45 and the synchronous pressing plate 46 when they are against each other. A steering member 47 is provided on the side of the inclined slide rail 41. The steering member 47 divides the pulling rope 44 into a vertical end moving in a vertical direction and an inclined end moving in a direction parallel to the axis of the inclined slide rail 41. The pulling rope 44 is connected to the sliding block 42 after being turned by the steering member 47.

[0028] In this embodiment, the steering member 47 includes a steering wheel and a guide wheel which are sequentially arranged from top to bottom, and the guide wheel guides and limits the pulling rope 44 .

[0029] During use, when the display screen is stored in the shell 1, the lifting frame 3 is located below the shell 1, the synchronous pressure plate 46 keeps pressing the limit block 45, the pulling rope 44 is fixed, and the sliding block 42 connected thereto is located at the upper end of the inclined slide rail 41, fixing the cover plate 2 at the opening 111. At this time, the buffer assist spring 43 is in a stretched state. When the lifting frame 3 rises, the synchronous pressure plate 46 rises with the lifting frame 3, and the limit block 45 is released from the pressure of the synchronous pressure plate 46. The buffer assist spring 43 contracts, thereby driving the sliding block 42 to move horizontally obliquely downward along the inclined slide rail 41, thereby opening the opening 111. At this time, the inclined end of the pulling rope 44 is pulled down, and the limit block 45 on the vertical end moves up. When the lifting frame 3 rises to the upper limit position, the display screen is just completely exposed on the table 8 above the elevator.

[0030] When the display screen is to be stored in the shell 1 from the table top 8, the lifting frame 3 descends, and the synchronous pressure plate 46 descends accordingly until the synchronous pressure plate 46 abuts against the limit block 45, pressing down the limit block 45 to drive the vertical end of the pulling rope 44 to slide downward, pulling the sliding block 42 connected to the inclined end to move upward along the inclined slide rail 41, thereby moving the cover plate 2 to the opening 111 to block the opening 111.

[0031] The present invention realizes the linkage movement of the cover plate 2 and the lifting frame 3 through the pulling rope 44, the limit block 45, and the synchronous pressure plate 46. The structure is simple, and the cover plate 2 is driven by the pulling rope 44, the buffer assist spring 43 and other flexible driving means, and the linkage mechanism 4 operates smoothly.

[0032] As a specific embodiment of the present invention, a fixed ear plate 12 is provided under the shell 1, and a limiting ear plate 13 is provided under the steering member 47. The limiting ear plate 13 and the synchronous pressure plate 46 are both provided with limiting guide holes for limiting and guiding the pulling rope 44. One end of the pulling rope 44 is connected to the fixed ear plate 12, and the other end passes through the limiting guide holes on the synchronous pressure plate 46 and the limiting ear plate 13 in turn, and is connected to the upper end of the sliding block 42 after being turned by the steering member 47. The limiting block 45 is arranged between the fixed ear plate 12 and the synchronous pressure plate 46, and the pulling rope 44 is limited by the limiting guide holes on the limiting ear plate 13 and the synchronous pressure plate 46, thereby ensuring that the limiting blocks 45 on the synchronous pressure plate 46 and the pulling rope 44 are always arranged in the same vertical direction.

[0033] As a specific embodiment of the present invention, a slide groove 49 is provided on the side of the inclined slide rail 41, and the sliding block 42 includes a sliding end sliding along the inclined slide rail 41 and a connecting end for connecting to the cover plate 2, a transition section penetrating the slide groove 49 is provided between the sliding end and the connecting end, and a cover plate support arm 21 arranged in a vertical direction is provided between the connecting end and the cover plate 2.

[0034] Limiting protrusions are provided at both ends of the inclined slide rail 41 to prevent the slide block 42 from derailing.

[0035] As a specific embodiment of the present invention, the axis of the buffer assisting spring 43 is parallel to the inclined slide rail 41, and a fixed block for fixing the buffer assisting spring 43 is provided on the side of the inclined slide rail 41. The two ends of the buffer assisting spring 43 are respectively connected to the fixed block and the sliding block 42. The axis of the buffer assisting spring 43 is parallel to the inclined slide rail 41, which helps the elastic force of the buffer assisting spring 43 to act on the sliding block 42 and reduce the resistance of the sliding block 42 when sliding downward.

[0036] As a specific embodiment of the present invention, a display screen is rotatably connected to the lifting frame 3, and an angle adjustment mechanism 5 for adjusting the inclination angle of the display screen is provided between the lifting frame 3 and the display screen. The angle adjustment mechanism 5 includes a fixed frame 51, a screen rotating shaft 52, and a driving shaft 53 for driving the screen rotating shaft 52 to rotate. The screen rotating shaft 52 is fixedly connected to the display screen, and the screen rotating shaft 52 and the driving shaft 53 are rotatably arranged on the fixed frame 51 through a bearing sleeve. A driven fixed wheel 54 and an active fixed wheel 55 are respectively sleeved on the screen rotating shaft 52 and the driving shaft 53. The driven fixed wheel 54 and the screen rotating shaft 52 do not rotate relative to each other, and the active fixed wheel 55 and the driving shaft 53 do not rotate relative to each other. For example, they can be fixed to each other by screws. A first connecting rod 56 and a second connecting rod 57 parallel to each other are connected between the driven fixed wheel 54 and the active fixed wheel 55. The annular surface of the driven fixed wheel 54 is provided with a connecting rod for rotating with the first connecting rod 56 and the second connecting rod 57. The first hinge hole and the second hinge hole are hinged, and the third hinge hole and the fourth hinge hole for hinged connection with the first link 56 and the second link 57 are provided on the annular surface of the active fixed wheel 55. The two ends of the first link 56 and the second link 57 are hinged on the driven fixed wheel 54 and the active fixed wheel 55 respectively. The axis of the first hinge hole and the second hinge hole, the axis of the third hinge hole and the fourth hinge hole, the first link 56 and the second link 57 form a parallelogram transmission structure. The driving shaft 53 is connected with a driving component 58 for driving the driving shaft 53 to rotate. The driving shaft 53 rotates under the drive of the driving component 58, driving the axis of the third hinge hole and the fourth hinge hole to rotate, and then driving the axis of the first hinge hole and the second hinge hole to rotate through the linkage of the first link 56 and the second link 57, and the screen rotating shaft 52 rotates accordingly, and the display screen rotates with the screen rotating shaft 52 as the axis to adjust the inclination angle of the display screen.

[0037] To improve the stability of the parallelogram transmission structure, two driven fixed wheels 54 and two active fixed wheels 55 may be provided, and the first connecting rod 56 and the second connecting rod 57 are sandwiched between the two driven fixed wheels 54 and the two active fixed wheels 55 .

[0038] As a specific embodiment of the present invention, the driving component 58 includes a first reducer 582 and a second reducer 583 respectively connected to a driving motor 581. The first reducer 582 and the second reducer 583 are both double-axis worm gear reducers. The double-axis worm gear reducer adopted in the present invention has self-locking property, which reduces the shaking of the display screen after positioning. The first reducer 582 and the second reducer 583 are connected by an elastic coupling 584. The elastic coupling 584 can eliminate the gap generated by the reducers at both ends during the transmission process, thereby improving the precision and smoothness of the rotation. The output shafts of the first reducer 582 and the second reducer 583 that are far away from each other are respectively connected with rigid couplings 585. The driving shaft 53 and the rigid coupling 585 are mutually connected by a damping shaft 586. The rigid coupling 585 can balance the torque at both ends, further increase the rotation accuracy, and achieve buffering and shock absorption effects in combination with the damping shaft 586.

[0039] In the present invention, the first reducer 582 and the second reducer 583 are respectively connected to the drive motor 581, wherein the first reducer 582 / the second reducer 583 and its drive motor 581 can be independent reducer and motor products, and can be commercially available integrated reduction motors.

[0040] As a specific embodiment of the present invention, the lifting frame 3 is connected to a lifting mechanism 6, which includes a lifting motor 61 and a pulley transmission assembly, and the pulley transmission assembly includes a driving wheel 62, a synchronous wheel, and a conveyor belt 64 sleeved between the driving wheel 62 and the synchronous wheel. The driving wheel 62 is sleeved on the output shaft of the lifting motor 61, and the conveyor belt 64 is connected to the lifting frame 3 through a conveyor belt pressing block 65. During operation, the lifting motor 61 rotates to drive the driving wheel 62 to rotate, thereby driving the conveyor belt 64 to rotate around the driving wheel 62 and the synchronous wheel, and the lifting frame 3 fixed thereto is lifted and lowered accordingly.

[0041] Example 2

[0042] Reference Figure 1 As shown, the difference between this embodiment and the first embodiment is that an auxiliary spring 48 is provided above the fixed ear plate 12, and the auxiliary spring 48 is sleeved outside the pulling rope 44. When the display screen is stored in the housing 1, the lifting frame 3 is located below the housing 1, the synchronous pressing plate 46 keeps pressing the limit block 45, and the auxiliary spring 48 is compressed. Then, when the lifting frame 3 rises, the auxiliary spring 48 stretches to provide assistance to the buffer assisting spring 43.

[0043] Example 3

[0044] See also Figure 3As shown, the difference between this embodiment and embodiment 1 is that the angle adjustment mechanism 5 is further provided with a detection component 7 for detecting the current tilt state of the display screen, and the detection component 7 includes a first photoelectric sensor 71 and a second photoelectric sensor 72. The first photoelectric sensor 71 and the second photoelectric sensor 72 are respectively provided with a first shielding plate 73 and a second shielding plate 74 for shielding their light signals. The first shielding plate 73 and the second shielding plate 74 are annular plates with a notch 75 and are concentrically arranged with the driving shaft 53. In this embodiment, the first shielding plate 73 and the second shielding plate 74 are respectively provided with a first shielding plate 73 and a second shielding plate 74 for shielding their light signals. The fixing ring sleeved on the driving shaft 53 or the damping shaft 586 is fixed, and the notches 75 of the first baffle plate 73 and the second baffle plate 74 do not completely overlap to ensure that only one photoelectric sensor is blocked; the tilt state includes a forward tilt state, a backward tilt state and a vertical state. When the display screen is in a vertical state, the light signals of the first photoelectric sensor 71 and the second photoelectric sensor 72 are blocked at the same time. When the display screen is in a forward tilt state, only the light signal of the first photoelectric sensor 71 is blocked. When the display screen is in a backward tilt state, only the light signal of the second photoelectric sensor 72 is blocked.

[0045] Specifically, when the display screen is in a vertical state, the light signals of the first photoelectric sensor 71 and the second photoelectric sensor 72 are blocked at the same time; when the display screen is in a forward tilted state, the first photoelectric sensor 71 is blocked by the annular surface of the first baffle plate 73, and the notch 75 of the second baffle plate 74 just rotates to the second photoelectric sensor 72, and the light signal of the second photoelectric sensor 72 is not blocked, that is, only the light signal of the first photoelectric sensor 71 is blocked; when the display screen is in a backward state, only the light signal of the second photoelectric sensor 72 is blocked, and the control program judges the current forward tilt state of the display screen by whether the light signals of the first photoelectric sensor 71 and the second photoelectric sensor 72 are blocked. Before the display screen is retracted into the shell 1, the control program first judges the current tilt state of the display screen. If the display screen is not in a vertical state, the display screen is adjusted to a vertical state by controlling the rotation of the drive shaft 53 (that is, the drive shaft 53 is rotated until the light signals of the first photoelectric sensor 71 and the second photoelectric sensor 72 are blocked at the same time).

[0046] The present invention can determine whether the display screen is in a vertical state before storage by detecting component 7, and reset the display screen to a vertical state based on the judgment result, without the need for manual angle adjustment. At the same time, it can effectively prevent the display screen from colliding with the notch 81 and the opening 111 during the storage process, making the storage of the display screen more convenient, smoother and safer.

[0047] Example 4

[0048] Reference Figures 4 to 5As shown, a mounting structure of a frameless elevator includes a table top 8 arranged above the elevator, an upper end surface 11 including a mounting annular surface 113 arranged at the edge of the upper end surface 11, the inner side of the mounting annular surface 113 extends upward and bends to form a convex wall 112 for installation and positioning and for movement of the cover plate 2, the interior of the convex wall 112 is hollow, and an opening 111 is arranged on the upper surface of the convex wall 112, a groove 82 for accommodating the convex wall 112 is opened at the bottom of the table top 8, a notch 81 adapted to the opening 111 is penetrated at the bottom of the groove 82, and the size of the notch 81 can be set to be equal to or slightly larger than the opening 111.

[0049] The lift of the present invention can be used in training rooms, conference rooms and other places. Since the table top 8 usually has a certain thickness, in order to prevent the cover plate 2 from colliding with the inner wall of the slot 81 when moving along the inclined slide rail 41, a groove 82 is opened at the bottom of the slot 81, and a convex wall 112 is correspondingly provided on the lift to provide sufficient movement space for the cover plate 2 when moving along the inclined slide rail 41.

[0050] On the other hand, during the installation process of the present invention, by inserting the protrusion 112 into the groove 82, the opening 111 and the notch 81 can be quickly and precisely overlapped in the vertical direction, thereby realizing the rapid installation and positioning of the elevator, and then the elevator is fixed to the table top 8. In this embodiment, screw holes are set on the installation annular surface 113, and the elevator is fixed to the table top 8 from the bottom by screws, thereby completing the fixation of the elevator and the table top 8. In order to further strengthen the connection between the two, ear plates can also be set on the side of the upper end surface 11 to reinforce the connection.

[0051] The present invention only opens a notch 81 on the table top 8 that matches the size of the opening 111. Combined with the improvements on the upper end surface 11 of the elevator and the bottom of the table top 8, the table top 8 has a small opening and the elevator is installed without a frame, which is beneficial to the effective use of the space of the table top 8. At the same time, the table top 8 is neat and beautiful.

[0052] As a specific implementation of the present invention, at least one inner wall of the boss 112 along the length direction is an inclined surface that gradually expands downward from the opening 111. While reducing the outer diameter width of the boss 112, it avoids collision with the inner wall of the boss 112 when the cover plate 2 moves along the inclined slide rail 41, thereby reducing consumables.

[0053] In this article, "first", "second", "third", "fourth", etc. are only used to distinguish each other, and do not indicate their importance and order, or the premise of each other's existence.

[0054] Of course, the above diagrams are only preferred embodiments of the present invention and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A frameless lift, comprising a shell, wherein an opening is formed on the upper end surface of the shell, a cover plate is movably provided at the opening, and a lifting frame capable of lifting and lowering is also provided in the shell, wherein: A linkage mechanism is provided between the lifting frame and the cover plate for driving the cover plate to open and close synchronously with the lifting of the lifting frame, and the linkage mechanism includes an inclined slide rail arranged along the inclined direction and a sliding block slidably arranged on the inclined slide rail, the inclined slide rail is arranged on both sides of the interior of the shell, the sliding block is connected with a buffer assist spring for providing a downward sliding pulling force for the sliding block and a traction rope for providing an upward sliding pulling force for the sliding block, the traction rope sleeve is provided with a limit block, the lifting frame is provided with a synchronous pressing plate for pressing down the limit block so that the traction rope can slide up and down synchronously with the lifting frame, a steering member is provided on the side of the inclined slide rail, and the traction rope is connected to the sliding block after being turned by the steering member; A fixed ear plate is provided below the shell, a limiting ear plate is provided below the steering member, and limiting guide holes for limiting and guiding the pulling rope are provided on the limiting ear plate and the synchronous pressing plate. One end of the pulling rope is connected to the fixed ear plate, and the other end passes through the limiting guide holes on the synchronous pressing plate and the limiting ear plate in turn, and is connected to the upper end of the sliding block after being turned by the steering member. The limiting block is provided between the fixed ear plate and the synchronous pressing plate. The axis of the buffer assist spring is parallel to the inclined slide rail. A fixing block for fixing the buffer assist spring is arranged on the side of the inclined slide rail. The two ends of the buffer assist spring are respectively connected to the fixing block and the sliding block.

2. The frameless lift according to claim 1, characterized in that: An auxiliary spring is arranged above the fixed ear plate, and the auxiliary spring is sleeved outside the pulling rope.

3. The frameless lift according to claim 1, characterized in that: A slide groove is provided on the side of the inclined slide rail, and the sliding block includes a sliding end sliding along the inclined slide rail and a connecting end for connecting the cover plate, a transition section penetrating the slide groove is provided between the sliding end and the connecting end, and a cover plate support arm arranged in the vertical direction is provided between the connecting end and the cover plate.

4. The frameless lift according to claim 1, characterized in that: A display screen is rotatably connected to the lifting frame, and an angle adjustment mechanism for adjusting the inclination angle of the display screen is provided between the lifting frame and the display screen. The angle adjustment mechanism includes a fixed frame, a screen rotating shaft, and a driving shaft for driving the screen rotating shaft to rotate. The screen rotating shaft and the driving shaft are rotatably arranged on the fixed frame, and a driven fixed wheel and an active fixed wheel are respectively sleeved on the screen rotating shaft and the driving shaft. A first connecting rod and a second connecting rod parallel to each other are connected between the driven fixed wheel and the active fixed wheel, and two ends of the first connecting rod and the second connecting rod are respectively hinged to the driven fixed wheel and the active fixed wheel, and the driving shaft is connected to a driving component for driving the driving shaft to rotate.

5. The frameless lift according to claim 4, characterized in that: The drive assembly includes a first reducer and a second reducer respectively connected to drive motors, the first reducer and the second reducer are both double-axis worm gear reducers, the first reducer and the second reducer are connected by an elastic coupling, the output shafts of the first reducer and the second reducer which are far away from each other are respectively connected to rigid couplings, and the drive shaft and the rigid coupling are connected to each other by a damping shaft.

6. The frameless lift according to claim 4, characterized in that: The angle adjustment mechanism is also provided with a detection component for detecting the current tilt state of the display screen, the detection component includes a first photoelectric sensor and a second photoelectric sensor, the first photoelectric sensor and the second photoelectric sensor are respectively provided with a first shielding plate and a second shielding plate for shielding their light signals, the first shielding plate and the second shielding plate are annular plates with notches, and are concentrically arranged with the driving shaft, and the notches of the first shielding plate and the second shielding plate do not completely overlap; the tilt state includes a forward tilt state, a backward tilt state and a vertical state, when the display screen is in a vertical state, the light signals of the first photoelectric sensor and the second photoelectric sensor are blocked at the same time, when the display screen is in a forward tilt state, only the light signal of the first photoelectric sensor is blocked, and when the display screen is in a backward tilt state, only the light signal of the second photoelectric sensor is blocked.

7. The frameless lift according to any one of claims 1 to 6, characterized in that: The lifting frame is connected to a lifting mechanism, which includes a lifting motor and a pulley transmission assembly. The pulley transmission assembly includes a driving wheel, a synchronous wheel, and a conveyor belt sleeved between the driving wheel and the synchronous wheel. The driving wheel is sleeved on the output shaft of the lifting motor, and the conveyor belt is connected to the lifting frame through a conveyor belt pressing block.

8. The mounting structure of a frameless lift according to any one of claims 1 to 6, characterized in that: It includes a table top arranged above the elevator, the upper end surface includes a mounting ring surface arranged on the edge of the upper end surface, the inner side of the mounting ring surface extends upward and bends to form a convex wall for installation and positioning and for the movement of the cover plate, the interior of the convex wall is hollow, and the opening is arranged on the upper surface of the convex wall, and a groove for accommodating the convex wall is opened at the bottom of the table top, and a notch matching the opening is penetrated at the bottom of the groove.

Images