Three-screen splicing lifter

Abstract

The utility model relates to the field of paperless office conferences, in particular to a three-screen splicing lifter, three splicing screens are driven by a lifting driving device to ascend and descend so as to enter and exit a case, a pitching angle of the three splicing screens outside the case can be adjusted by a pitching adjusting device so as to adapt to requirements of different groups, the compatibility of equipment can be improved, and the cost is reduced. And the use requirements in different environments are met. The pitching adjusting device comprises a pitching motor, a connecting rod assembly and a rotating shaft bottom plate. The rotating shaft is fixedly connected with the lower end of the three-splicing screen. The pitching motor is fixedly arranged on the lifting plate, one end of the connecting rod assembly is connected with an output shaft of the pitching motor, and the other end of the connecting rod assembly is connected with the rotating shaft to drive the rotating shaft, the bottom plate and the three-splicing screen to rotate in the axial direction. The pitching motor drives the three-splicing screen to rotate through the connecting rod assembly and the rotating shaft, the adjusting efficiency can be improved, full-automatic operation is achieved, and using is very convenient and fast.

Description

Technical Field

[0001] The utility model relates to the field of paperless office conferences, in particular to a three-screen splicing lifter. Background Art

[0002] Nowadays, many meetings involve the field of paperless office meetings. While promoting environmental protection, paperless office meetings also provide many conveniences to meeting participants, such as real-time recording and annotation of meeting minutes, meeting sign-in and answering questions for participants, etc.

[0003] Currently, most of the lifts on the market are single-screen, and the spliced ​​screens are arranged horizontally and side by side. The operator needs to move the body or tilt the body to operate, which is troublesome to operate and the cost is also high. Utility Model Content

[0004] In order to solve the technical defects mentioned in the above background technology, the purpose of the utility model is to provide a three-screen splicing lifter.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A three-screen splicing lifter, comprising a chassis, three splicing screens arranged in the chassis, a lifting drive device for driving the lifting movement of the three splicing screens, and at least one set of pitch adjustment devices for adjusting the pitch angles of the three splicing screens; the pitch adjustment device comprises a pitch motor, a connecting rod assembly and a rotating shaft; the rotating shaft is rotatably connected to the lifting plate of the lifting drive device, and the rotating shaft is fixedly connected to the lower end of the three splicing screens; the pitch motor is fixedly arranged on the lifting plate, one end of the connecting rod assembly is connected to the output shaft of the pitch motor, and the other end of the connecting rod assembly is connected to the rotating shaft to drive the rotating shaft, the bottom plate, and the three splicing screens to rotate axially.

[0007] By adopting the above technical solution, the three-spliced ​​screen is driven by the lifting drive device to move in and out of the chassis, and the pitch adjustment device can adjust the pitch angle of the three-spliced ​​screen outside the chassis to meet the needs of different groups, improve the compatibility of the equipment, and meet the use requirements of different environments. The pitch motor drives the three-spliced ​​screen to rotate through the connecting rod assembly and the rotating shaft, which can improve the efficiency of adjustment, fully automated operation, and very convenient to use.

[0008] Furthermore, a slot opening downward is provided on the side of the rotating shaft away from the bottom plate. The connecting rod assembly includes a damping shaft, a support, a swing block, a pitch connecting rod and a clamping block. One end of the damping shaft is connected to the output shaft of the pitch motor, and the other end of the damping shaft passes through the support and is rotatably connected to the swing block. The end of the swing block is connected to one end of the pitch connecting rod, and the other end of the pitch connecting rod is rotatably connected to the clamping block. The damping shaft is horizontally arranged, and the clamping block is clamped in the slot to drive the rotating shaft to rotate axially, converting the horizontal driving force into a vertical driving force so that the three-spliced ​​screen can rotate to adjust the pitch state, thereby improving the adjustment efficiency and saving costs.

[0009] Furthermore, the rotating shaft includes a shaft body and a plurality of mounting strips, the shaft body is set as a long strip structure, the side of the shaft body connected to the bottom plate is set as a plane, the two sides of the shaft body along the length direction are set as arc structures, and the lower side of the shaft body is provided with the slot. A plurality of mounting strips are set in the slot, the mounting strip is set as an arc strip structure, one side of the mounting strip is fixedly connected to the inner side wall of the slot, a mounting channel is set between the side of the mounting strip located at the opening and the inner side wall of the slot, and the clamping block is fixed in the mounting channel to improve the efficiency of installation and disassembly.

[0010] Furthermore, the pitch adjustment device also includes a third sensor sheet and a third photoelectric switch. The third photoelectric switch is arranged on the chassis, and the third sensor sheet is arranged on the side of the support away from the pitch motor, and the third sensor sheet is fixedly connected to the end of the damping shaft. The third sensor sheet is arranged in a Z-shaped structure, and the other end of the third sensor sheet corresponds to the third photoelectric switch to trigger the third photoelectric switch to control the start and stop of the pitch motor, thereby improving the control accuracy and adjustment efficiency of the pitch adjustment of the three-spliced ​​screen.

[0011] Furthermore, the pitch adjustment device also includes at least one group of support components, and the support components include a support plate, a support seat and a support column. One side of the support plate is slidably connected to the corresponding guide rail, and the lifting plate is arranged between the support seat and the support plate, and the support plate is fixedly connected to the support seat. The upper end of the support seat is fixedly connected with the support column, and the support column is horizontally arranged and clamped in the installation channel, so as to improve the stability of the three-spliced ​​screen and reduce the friction of rotation, and it is more convenient to use.

[0012] Furthermore, a plurality of guide rails and racks are arranged at intervals on the inner side wall of the chassis. The lifting drive device also includes a lifting motor. One side of the lifting plate is slidably connected to the plurality of guide rails, and the other side of the lifting plate is provided with the lifting motor. The output shaft of the lifting motor is passed through the lifting plate and meshed with the rack. The three-spliced ​​screen is connected to the upper end of the lifting plate. The lifting motor is used to drive the three-spliced ​​screen to move up and down, and the flap device is used to automatically open and reset the panel to open or close the lifting port.

[0013] Furthermore, the lifting drive device also includes a sensing seat, a first photoelectric switch and a second photoelectric switch. The sensing seat is arranged on one side of the lifting plate, the upper end of the sensing seat is provided with a first sensing sheet, and the lower end of the sensing seat is provided with a second sensing sheet. The first photoelectric switch is arranged at the position of the lifting port. When the first sensing sheet is electrically connected to the first photoelectric switch, the lifting motor stops rotating, and the three-spliced ​​screen is located outside the chassis. The second photoelectric switch is arranged at the lower end of the inner side of the chassis. When the second sensing sheet is electrically connected to the second photoelectric switch, the lifting motor stops rotating, and the three-spliced ​​screen returns to the initial position in the chassis, thereby improving the control accuracy of the lifting and lowering, which is beneficial to protecting the equipment.

[0014] Furthermore, the three-screen splicing lifter also includes a flap device for flipping the panel at the lifting port at the upper end of the chassis; the flap device is provided with at least one group. One side of the panel in the length direction is rotatably connected to the chassis. The flap device includes a toggle connecting rod, a pull rod, a reset elastic member and a fixed plate. The fixed plate is fixedly connected to the side of the chassis, one end of the toggle connecting rod is clamped on one end of the panel, the middle part of the toggle connecting rod is rotatably connected to the fixed plate, the other end of the toggle connecting rod is connected to the upper end of the pull rod, and the lower end of the pull rod is provided with an expansion part. One end of the reset elastic member is connected to one end of the toggle connecting rod, and the other end of the reset elastic member is connected to the fixed plate. When the three-splicing screen is in the initial position, the expansion part is pressed and connected to the lifting plate to drive the panel to rotate and close the lifting port through the toggle connecting rod, and the reset elastic member is pulled up, the structure is simple, the efficiency of the flap is improved, and the cost is saved.

[0015] Furthermore, the fixing plate is provided with an arc-shaped guide groove. One end of the toggle connecting rod connected to the panel is provided with a guide column, one end of which passes through the guide groove and is slidably arranged in the guide groove, which can limit the flipping angle of the panel, thereby improving the stability of the device operation.

[0016] Furthermore, one end of the guide column away from the toggle connecting rod is connected to one end of the reset elastic member, and the reset elastic member is arranged on a side of the fixed plate away from the toggle connecting rod, which makes rational use of space and has a compact structure.

[0017] In summary, the beneficial effects of the utility model are:

[0018] The utility model drives the three-spliced ​​screen to move in and out of the chassis through the lifting drive device, and the pitch adjustment device can adjust the pitch angle of the three-spliced ​​screen outside the chassis to meet the needs of different groups, improve the compatibility of the equipment, and meet the use needs of different environments. The pitch motor drives the three-spliced ​​screen to rotate through the connecting rod assembly and the rotating shaft, which can improve the efficiency of adjustment, fully automated operation, and very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a three-screen splicing lifter of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the three-screen splicing lifter of the utility model.

[0021] Figure 3 It is a schematic diagram of the internal structure of the three-screen splicing lifter of the utility model from another perspective.

[0022] Figure 4 It is a partial structure enlarged schematic diagram of the flap device of the three-screen splicing lifter of the utility model.

[0023] Figure 5 It is a front view of the pitch adjustment device of the three-screen splicing lifter of the utility model.

[0024] Figure 6 It is a structural schematic diagram of a connecting rod assembly of a three-screen splicing lifter of the utility model.

[0025] Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure of BB.

[0026] Figure 8 yes Figure 5 Schematic diagram of the cross-sectional structure of AA.

[0027] Fig. 9 It is a structural schematic diagram of a support assembly of a three-screen splicing lifter of the utility model.

[0028] Description of reference numerals in the figures:

[0029] 1. Three-screen splicing lifter; 2. Chassis; 21. Guide rail; 22. Rack; 23. Panel; 3. Three-screen splicing; 4. Lifting drive device; 41. Lifting plate; 42. Lifting motor; 43. Gear; 44. Induction seat; 46. Second photoelectric switch; 47. First induction sheet; 48. Second induction sheet; 5. Pitch adjustment device; 51. Pitch motor; 52. Connecting rod assembly; 521. Damping shaft; 522. Support; 523. Swing block; 524, pitch link; 525, clamping block; 53, rotating shaft; 531, shaft body; 532, mounting strip; 533, clamping slot; 54, bottom plate; 55, third sensing sheet; 56, third photoelectric switch; 57, supporting assembly; 571, supporting plate; 572, supporting seat; 573, supporting column; 6, flip device; 61, toggle link; 62, pull rod; 63, resetting elastic member; 64, fixing plate; 65, guide groove; 66, guide column. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0031] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0032] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] The following is combined with Figure 1-9 , the embodiments of the utility model are further described in detail.

[0034] A three-screen splicing lifter 1, such as Figure 1, Figure 2 , Figure 3 As shown, it includes a chassis 2, a three-jointed screen 3 arranged in the chassis 2, a lifting drive device 4 for driving the lifting movement of the three-jointed screen 3, and at least one set of pitch adjustment devices 5 for adjusting the pitch angle of the three-jointed screen 3. The pitch adjustment device 5 includes a pitch motor 51, a connecting rod assembly 52, a rotating shaft 53 and a bottom plate 54. The rotating shaft 53 is rotatably connected to the lifting plate 41 of the lifting drive device 4, and the rotating shaft 53 is fixedly connected to the lower end of the three-jointed screen 3. The pitch motor 51 is fixedly arranged on the lifting plate 41, one end of the connecting rod assembly 52 is connected to the output shaft of the pitch motor 51, and the other end of the connecting rod assembly 52 is connected to the rotating shaft 53 to drive the rotating shaft 53, the bottom plate 54, and the three-jointed screen 3 to rotate axially.

[0035] The three-spliced ​​screen 3 is driven by the lifting drive device 4 to move in and out of the chassis 2. The pitch adjustment device 5 can adjust the pitch angle of the three-spliced ​​screen 3 outside the chassis 2 to meet the needs of different groups, improve the compatibility of the equipment, and meet the use requirements of different environments. The pitch motor 51 drives the three-spliced ​​screen 3 to rotate through the connecting rod assembly 52 and the rotating shaft 53, which can improve the efficiency of the adjustment, fully automated operation, and very convenient to use.

[0036] In this embodiment, please refer to Figure 3 , a plurality of guide rails 21 and racks 22 are arranged at intervals on the inner side wall of the chassis 2. Specifically, four guide rails 21 are arranged, and two guide rails 21 are arranged on each side of the rack 22 to improve the stability during the lifting operation.

[0037] The lifting drive device 4 also includes a lifting motor 42 and a gear 43. One side of the lifting plate 41 is slidably connected to the plurality of guide rails 21, and the other side of the lifting plate 41 is provided with a lifting motor 42. The output shaft of the lifting motor 42 is passed through the lifting plate 41 and connected to the gear 43, and the gear 43 is meshed and connected to the rack 22. The three-spliced ​​screen 3 is connected to the upper end of the lifting plate 41. The lifting motor 42 is used to drive the three-spliced ​​screen 3 to move up and down, and the flap device 6 is used to automatically open and reset the panel 23 to open or close the lifting port. Among them, the lifting motor 42 adopts a car window motor to drive the lifting, which is quieter and more stable.

[0038] Please refer to Figure 2 , Figure 3, the lifting drive device 4 also includes a sensing seat 44, a first photoelectric switch and a second photoelectric switch 46. The sensing seat 44 is arranged on one side of the lifting plate 41, and a first sensing sheet 47 is arranged at the upper end of the sensing seat 44, and a second sensing sheet 48 is arranged at the lower end of the sensing seat 44. The first photoelectric switch is arranged at the lifting port position. When the first sensing sheet 47 is electrically connected to the first photoelectric switch, the lifting motor 42 stops rotating, and the three-spliced ​​screen 3 is located outside the chassis 2. The second photoelectric switch 46 is arranged at the lower end of the inner side of the chassis 2. When the second sensing sheet 48 is electrically connected to the second photoelectric switch 46, the lifting motor 42 stops rotating, and the three-spliced ​​screen 3 returns to the initial position in the chassis 2, thereby improving the control accuracy of the lifting and lowering, which is beneficial to protecting the equipment. Among them, the structure of the first photoelectric switch is not drawn in the figure, and the structure of the second photoelectric switch 46 can be referred to.

[0039] In this embodiment, please refer to Figure 3 , Figure 4 The three-screen splicing lifter 1 also includes a flap device 6 for flipping the panel 23 at the lifting port at the upper end of the chassis 2. At least one group of flap devices 6 is provided. Among them, two groups of flap devices 6 are provided, and one group of flap devices 6 is provided on both sides of the length direction of the chassis 2. One side of the length direction of the panel 23 is rotatably connected to the chassis 2. The flap device 6 includes a toggle connecting rod 61, a pull rod 62, a reset elastic member 63 and a fixed plate 64. The fixed plate 64 is fixedly connected to the side of the chassis 2, one end of the toggle connecting rod 61 is clamped on one end of the panel 23, the middle part of the toggle connecting rod 61 is rotatably connected to the fixed plate 64, the other end of the toggle connecting rod 61 is connected to the upper end of the pull rod 62, and the lower end of the pull rod 62 is provided with an expansion portion. The expansion portion is not drawn in the figure. One end of the reset elastic member 63 is connected to one end of the toggle connecting rod 61, and the other end of the reset elastic member 63 is connected to the fixed plate 64. The resetting elastic member 63 may be an elastic structure such as a spring or a spring column. When the three-jointed screen 3 is in the initial position, the enlarged portion is pressed and connected with the lifting plate 41 to drive the panel 23 to rotate and close the lifting port by toggling the connecting rod 61, and the resetting elastic member 63 is pulled up, which has a simple structure, improves the efficiency of the flipping plate, and saves costs.

[0040] Specifically, the pull rod 62 passes through the sensing seat 44, the enlarged portion of the pull rod 62 is in contact with the lower end surface of the sensing seat 44, and the sensing seat 44 moves with the lifting plate 41. When the sensing seat 44 is separated from the enlarged portion, the reset elastic member 63 drives the toggle connecting rod 61 to rotate so that the panel 23 opens the lifting port. The opening and closing of the lifting port are synchronized with the rising or falling of the three-spliced ​​screen 3, the driving structure is simple, the cost is significantly saved, and the lifting efficiency is improved.

[0041] The fixing plate 64 is provided with an arc-shaped guide groove 65. One end of the toggle connecting rod 61 connected to the panel 23 is provided with a guide column 66, one end of the guide column 66 passes through the guide groove 65 and is slidably arranged in the guide groove 65, which can limit the flip angle of the panel 23, thereby improving the stability of the device operation.

[0042] One end of the guide column 66 away from the toggle link 61 is connected to one end of the reset elastic member 63 . The reset elastic member 63 is arranged on a side of the fixing plate 64 away from the toggle link 61 , which makes reasonable use of space and has a compact structure.

[0043] In this embodiment, please refer to Figure 3 , Figure 5 , Figure 6 The rotating shaft 53 is fixedly connected to the bottom plate 54, and the bottom plate 54 is fixedly connected to the lower end of the three-jointed screen 3. The rotating shaft 53 and the bottom plate 54 are locked together by screws to improve the stability of the connection. A downwardly opening slot 533 is provided on the side of the rotating shaft 53 away from the bottom plate 54. The connecting rod assembly 52 includes a damping shaft 521, a support 522, a swing block 523, a pitch connecting rod 524 and a clamping block 525. One end of the damping shaft 521 is connected to the output shaft of the pitch motor 51, and the other end of the damping shaft 521 passes through the support 522 and is rotatably connected to the swing block 523. The end of the swing block 523 is connected to one end of the pitch connecting rod 524, and the other end of the pitch connecting rod 524 is rotatably connected to the clamping block 525. The damping shaft 521 is arranged horizontally, and the clamping block 525 is clamped in the clamping slot 533 to drive the rotating shaft 53 to rotate axially, and convert the horizontal driving force into the vertical driving force to rotate the three-jointed screen 3 to adjust the pitch state, thereby improving the adjustment efficiency and saving costs.

[0044] Please refer to Figure 7 The rotating shaft 53 includes a shaft body 531 and a plurality of mounting strips 532. The shaft body 531 is set as a long strip structure. The side of the shaft body 531 connected to the bottom plate 54 is set as a plane. The two sides of the shaft body 531 along the length direction are set as arc structures. The lower side of the shaft body 531 is provided with a slot 533. The plurality of mounting strips 532 are set in the slot 533. The mounting strips 532 are set as an arc strip structure. One side of the mounting strip 532 is fixedly connected to the inner side wall of the slot 533. An installation channel is set between the side of the opening of the mounting strip 532 and the inner side wall of the slot 533. The clamping block 525 is fixed in the installation channel to improve the efficiency of installation and disassembly.

[0045] The pitch adjustment device 5 also includes a third sensor sheet 55 and a third photoelectric switch 56. The third photoelectric switch 56 is arranged on the chassis 2, and the third sensor sheet 55 is arranged on the side of the support 522 away from the pitch motor 51, and the third sensor sheet 55 is fixedly connected to the end of the damping shaft 521. The third sensor sheet 55 is arranged in a Z-shaped structure, and the other end of the third sensor sheet 55 corresponds to the switch setting of the third photoelectric switch 56, so as to trigger the third photoelectric switch 56 to control the start and stop of the pitch motor 51, thereby improving the control accuracy and adjustment efficiency of the pitch adjustment of the three splicing screens 3.

[0046] Please refer to Figure 5 , Figure 8 , Fig. 9 , the pitch adjustment device 5 also includes at least one group of support components 57, and the support components 57 include a support plate 571, a support seat 572 and a support column 573. One side of the support plate 571 is slidably connected to the corresponding guide rail 21, and the lifting plate 41 is arranged between the support seat 572 and the support plate 571, and the support plate 571 is fixedly connected to the support seat 572. The upper end of the support seat 572 is fixedly connected with a support column 573, and the support column 573 is horizontally arranged and clamped in the installation channel, which improves the stability of the three-spliced ​​screen 3 and reduces the friction of rotation, making it more convenient to use. Among them, each group of pitch adjustment devices 5 is provided with two groups of support components 57, and the pitch motor 51 is arranged between the two groups of support components 57 to improve the stability of equipment adjustment.

[0047] During the rising process, when the lifting plate 41 rises driven by the lifting motor 42, the pull rod 62 is automatically pulled open by the restoring force of the reset elastic member 63 to expose the lifting port, and the lifting plate 41 rises together with the three-spliced ​​screen 3 until it is flush with the panel 23, and the first sensor sheet 47 triggers the first photoelectric switch, and the power is cut off to stop the lifting motor 42 from rising; the pitch motor 51 drives the pitch link 524 to start to tilt backward, and when the required angle is reached, the third sensor sheet 55 triggers the third photoelectric switch 56 to work and stop tilting backward.

[0048] During the descent process, when the descent command is pressed, the pitch motor 51 drives the pitch link 524 to start moving forward, and when it reaches the vertical state, the third photoelectric switch 56 works and stops tilting forward. The lifting motor 42 on the lifting plate 41 starts to drive the lifting plate 41 and the three-jointed screen 3 to descend. When it is about to reach the set position, the enlarged part of the pull rod 62 is driven down by the induction seat 44 of the lifting plate 41, thereby driving the toggle link 61 and the panel 23 to rotate together to close the lifting port. The lifting plate 41 continues to descend to the predetermined position with the three-jointed screen 3, and the second induction sheet 48 triggers the second photoelectric switch 46 to work, and the lifting motor 42 stops descending. The panel 23 just closes the lifting port, and the whole work is completed.

[0049] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A three-screen splicing lifter (1), characterized in that: The invention comprises a chassis (2), a three-jointed screen (3) arranged in the chassis (2), a lifting drive device (4) for driving the three-jointed screen (3) to move upward and downward, and at least one set of pitch adjustment devices (5) for adjusting the pitch angle of the three-jointed screen (3); the pitch adjustment device (5) comprises a pitch motor (51), a connecting rod assembly (52) and a rotating shaft (53); the rotating shaft (53) is rotationally connected to a lifting plate (41) of the lifting drive device (4), and the rotating shaft (53) is fixedly connected to the lower end of the three-jointed screen (3); the pitch motor (51) is fixedly arranged on the lifting plate (41), one end of the connecting rod assembly (52) is connected to the output shaft of the pitch motor (51), and the other end of the connecting rod assembly (52) is connected to the rotating shaft (53) to drive the rotating shaft (53), the bottom plate (54) and the three-jointed screen (3) to rotate along the axial direction.

2. The three-screen splicing lifter (1) according to claim 1, characterized in that: A downwardly opening slot (533) is provided on one side of the rotating shaft (53) away from the bottom plate (54); the connecting rod assembly (52) comprises a damping shaft (521), a support (522), a swing block (523), a pitch connecting rod (524) and a clamping block (525); one end of the damping shaft (521) is connected to the output shaft of the pitch motor (51); the other end of the damping shaft (521) passes through the support (522) and is rotatably connected to the swing block (523); the end of the swing block (523) is connected to one end of the pitch connecting rod (524); the other end of the pitch connecting rod (524) is rotatably connected to the clamping block (525); the damping shaft (521) is arranged horizontally; the clamping block (525) is clamped in the slot (533) to drive the rotating shaft (53) to rotate axially.

3. The three-screen splicing lifter (1) according to claim 2, characterized in that: The rotating shaft (53) comprises an axis body (531) and a plurality of mounting strips (532); the axis body (531) is arranged as a long strip structure; the side of the axis body (531) connected to the bottom plate (54) is arranged as a plane; the two sides of the axis body (531) along the length direction are arranged as arc structures; the lower side of the axis body (531) is arranged with the clamping groove (533); the plurality of mounting strips (532) are arranged in the clamping groove (533); the mounting strips (532) are arranged as arc strip structures; one side of the mounting strip (532) is fixedly connected to the inner side wall of the clamping groove (533); an mounting channel is arranged between the side of the mounting strip (532) located at the opening and the inner side wall of the clamping groove (533); the clamping block (525) is fixed in the mounting channel.

4. The three-screen splicing lifter (1) according to claim 3, characterized in that: The pitch adjustment device (5) further comprises a third sensing sheet (55) and a third photoelectric switch (56); the third photoelectric switch (56) is arranged on the chassis (2); the third sensing sheet (55) is arranged on a side of the support (522) away from the pitch motor (51); the third sensing sheet (55) is fixedly connected to the end of the damping shaft (521); the third sensing sheet (55) is arranged in a Z-shaped structure; the other end of the third sensing sheet (55) corresponds to the switch arrangement of the third photoelectric switch (56) to trigger the third photoelectric switch (56) to control the start and stop of the pitch motor (51).

5. The three-screen splicing lifter (1) according to claim 3, characterized in that: The pitch adjustment device (5) also includes at least one group of support components (57), the support components (57) including a support plate (571), a support seat (572) and a support column (573), one side of the support plate (571) is slidably connected to the corresponding guide rail (21), the lifting plate (41) is arranged between the support seat (572) and the support plate (571), the support plate (571) is fixedly connected to the support seat (572), the upper end of the support seat (572) is fixedly connected to the support column (573), and the support column (573) is horizontally arranged and clamped in the installation channel.

6. The three-screen splicing lifter (1) according to claim 1, characterized in that: A plurality of guide rails (21) and racks (22) are arranged at intervals on the inner side wall of the chassis (2); the lifting drive device (4) also includes a lifting motor (42); one side of the lifting plate (41) is slidably connected to the plurality of guide rails (21), and the other side of the lifting plate (41) is provided with the lifting motor (42); the output shaft of the lifting motor (42) is passed through the lifting plate (41) and meshedly connected with the rack (22); the three-spliced ​​screen (3) is connected to the upper end of the lifting plate (41); the lifting motor (42) is used to drive the three-spliced ​​screen (3) to move up and down, and the flap device (6) is used to automatically open and reset the panel (23) to open or close the lifting port.

7. The three-screen splicing lifter (1) according to claim 6, characterized in that: The lifting drive device (4) also includes a sensing seat (44), a first photoelectric switch and a second photoelectric switch (46); the sensing seat (44) is arranged on one side of the lifting plate (41), the upper end of the sensing seat (44) is provided with a first sensing sheet (47), and the lower end of the sensing seat (44) is provided with a second sensing sheet (48); the first photoelectric switch is arranged at the position of the lifting port, when the first sensing sheet (47) is electrically connected to the first photoelectric switch, the lifting motor (42) stops rotating, and the three-piece splicing screen (3) is located outside the chassis (2); the second photoelectric switch (46) is arranged at the lower end of the inner side of the chassis (2), when the second sensing sheet (48) is electrically connected to the second photoelectric switch (46), the lifting motor (42) stops rotating, and the three-piece splicing screen (3) returns to its initial position inside the chassis (2).

8. The three-screen splicing lifter (1) according to claim 6, characterized in that: The three-screen splicing lifter (1) also includes a flipping device (6) for flipping the panel (23) at the lifting port at the upper end of the chassis (2); at least one group of the flipping devices (6) is provided; one side of the panel (23) in the length direction is rotatably connected to the chassis (2); the flipping device (6) includes a toggle connecting rod (61), a pull rod (62), a reset elastic member (63) and a fixed plate (64); the fixed plate (64) is fixedly connected to the side of the chassis (2), one end of the toggle connecting rod (61) is clamped on one end of the panel (23), and the middle of the toggle connecting rod (61) is fixedly connected to the side of the chassis (2). The part is rotatably connected to the fixed plate (64), the other end of the toggle link (61) is connected to the upper end of the pull rod (62), and the lower end of the pull rod (62) is provided with an expansion part; one end of the reset elastic member (63) is connected to one end of the toggle link (61), and the other end of the reset elastic member (63) is connected to the fixed plate (64); when the three-spliced ​​screen (3) is in the initial position, the expansion part is press-connected with the lifting plate (41) to drive the panel (23) to rotate and close the lifting port through the toggle link (61), and the reset elastic member (63) is pulled up.

9. The three-screen splicing lifter (1) according to claim 8, characterized in that: The fixing plate (64) is provided with an arc-shaped guide groove (65), and one end of the toggle connecting rod (61) connected to the panel (23) is provided with a guide column (66), and one end of the guide column (66) passes through the guide groove (65) and is slidably arranged in the guide groove (65).

10. The three-screen splicing lifter (1) according to claim 9, characterized in that: One end of the guide column (66) away from the toggle connecting rod (61) is connected to one end of the reset elastic member (63), and the reset elastic member (63) is arranged on a side of the fixing plate (64) away from the toggle connecting rod (61).

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