Conference data distribution and recovery device

Abstract

The invention relates to the technical field of conference data management, in particular to a conference data distribution and recovery device which comprises a movable base, a guide box, a grabbing assembly and a taking and placing pushing assembly, and the conference data distribution and recovery device is exquisite in structure and powerful in function and has an efficient and convenient data distribution function. The core is that the grabbing assembly is tightly matched with the taking and placing pushing assembly. The device is high in automation degree, greatly saves the time and energy of manual data distribution, avoids omission or errors possibly occurring in manual distribution, remarkably improves the efficiency of a conference preparation stage, enables a conference to start more timely and orderly, not only has excellent performance in the aspect of data distribution, but also has a flexible and reliable data recovery function, and is suitable for popularization and application. The recycling process is high in automation degree and easy and convenient to operate, the complexity and low efficiency of manual page-by-page data collection can be effectively avoided, and a large amount of time and labor cost are saved for follow-up sorting work of the conference.

Description

Technical Field

[0001] The invention relates to the technical field of conference material management, in particular to a conference material distribution and recovery device. Background Art

[0002] In today's fast-paced business environment, meetings are important platforms for information exchange and decision-making, and their efficiency and effectiveness are crucial to the success of a company. The distribution and recovery of meeting materials, as a key link in the meeting organization process, not only affects the smooth progress of the meeting, but also concerns the effective transmission and security management of information. Especially for technology consulting companies, they need to frequently organize various meetings, including project kick-off meetings, solution discussion meetings, customer briefing meetings, etc. In these meetings, timely and accurate distribution of relevant materials to participants can ensure that everyone fully understands the topic before the meeting and is prepared for efficient discussion and decision-making.

[0003] However, currently, the distribution and recovery of conference materials are mostly carried out manually. Manual material distribution is slow and consumes a lot of time and manpower. For meetings with a large number of participants, it takes a long time to distribute all the materials, resulting in a delay in the start of the meeting. Manual material recovery is cumbersome and requires a lot of time and manpower to collect materials page by page. For large or important meetings, the workload of recovering materials is huge. The current distribution and recovery devices for conference materials lack special storage space and protection measures. The materials are easily affected by external factors before distribution and after recovery. At the same time, they rely on fixed places or equipment, are not convenient to move between different conference venues, and cannot adapt to flexible and changeable conference needs. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a conference material distribution and recovery device.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a conference material distribution and recovery device, including a mobile base, a guide box, a grabbing component and a pick-and-place push component, a support column is vertically fixed at one end of the top of the mobile base, a top plate is horizontally fixed at the top of the support column, a storage and access port is opened at one end of the top plate, the guide box is horizontally arranged at the end of the top plate away from the storage and access port, the grabbing component moves and cooperates on the side of the guide box close to the storage and access port, the pick-and-place push component includes a fixed base, a primary telescopic plate and a secondary telescopic plate, the fixed base is fixed on the top of the mobile base and is located directly below the storage and access port, the primary telescopic plate moves and cooperates on the mobile base, the secondary telescopic plate moves and cooperates on the primary telescopic plate, and the secondary telescopic plate and the primary telescopic plate move synchronously, the secondary telescopic plate supports a support plate for placing conference materials on the top of the secondary telescopic plate, and the mobile base serves as the basis of the entire device and supports the weight of all other components. The support column is vertically fixed at one end of the top of the mobile base, plays a key role in connecting the mobile base and the top plate, provides a stable supporting force for the top plate, and ensures that the top plate remains horizontal and does not shake during use. The top plate is fixed horizontally on the top of the support column, and the access port opened at one end is the core channel for conference materials to enter and exit the device, so that the materials can be smoothly transferred between the inside and outside of the device. The guide box is horizontally installed on the top of the top plate at one end away from the access port, providing a directional track and support for the movement of the grabbing component. The grabbing component moves and cooperates on the side of the guide box close to the access port. Through the guidance of the guide box, it can ensure that the grabbing component moves accurately to the preset position in the horizontal direction, so as to accurately align the conference materials at the access port or the target position on the conference table, so as to realize the grabbing and placing operations of the materials. The pick-up and placement push component consists of a fixed base, a first-level telescopic plate and a second-level telescopic plate, wherein the fixed base is fixed on the top of the mobile base and is located directly below the access port, providing a stable installation foundation for the entire pick-up and placement push component. The first-level telescopic plate moves and cooperates on the mobile base, and the second-level telescopic plate moves and cooperates on the first-level telescopic plate, and the two keep moving synchronously. The pallet supported on the top of the secondary telescopic plate is used to place conference materials. Through the synchronous telescopic action of the primary telescopic plate and the secondary telescopic plate, the pallet and the conference materials on it can be pushed in and out of the cabinet structure composed of the mobile base, the top plate and the cabinet plate to realize the storage and retrieval of materials;

[0006] Among them, a lifting frame is vertically fixed to the bottom of the top plate, and one side of the lifting frame is lifted and lowered to cooperate with the lifting plate, and two support rods are horizontally fixed on one side of the lifting plate, which can lift the pallet and lift it upward to the access port. The lifting frame fixed vertically at the bottom of the top plate provides a stable vertical guide and support for the lifting and lowering movement of the lifting plate. One side of the lifting frame cooperates with the lifting and lowering of the lifting plate, and drives the lifting plate to move up and down along the lifting frame through the internal transmission mechanism. The two support rods horizontally fixed on one side of the lifting plate are the components that directly contact the pallet. When the lifting plate rises, the support rods lift the pallet and lift it upward to the access port, so that the meeting materials on the pallet can reach a suitable height, which is convenient for the grabbing component to perform the grabbing operation.

[0007] Preferably, universal wheels are installed at the four corners of the bottom of the mobile base, a push handle is installed at one end of the top plate away from the access port, the top plate is arranged in parallel with the mobile base, and cabinet panels are installed on the four sides of the top plate and the mobile base. The top plate, the mobile base and the four cabinet panels are formed into a box-cabinet structure as a whole, and a window is provided on the cabinet panel near one end of the pick-up and push-pushing assembly to allow the first-level telescopic plate, the second-level telescopic plate, the support plate and the conference materials placed on the support plate to pass through. The mobile base serves as the basic support of the entire device, and the universal wheels installed at the four corners of the bottom enable the device to move flexibly to meet the location requirements of different conference venues. The push handle installed at one end of the top plate away from the access port provides a force point for the operator to facilitate pushing the device. The top plate is arranged in parallel with the mobile base, ensuring the overall stability and horizontality of the device. The cabinet panels installed on the four sides of the top plate and the mobile base form a box-cabinet structure, which provides protection and storage space for internal components and conference materials. The window opened on the cabinet board near one end of the pick-up and push component of the cabinet structure is for the smooth passage of the first-level telescopic board, the second-level telescopic board, the pallet and the conference materials placed on the pallet, so as to realize the automatic storage and retrieval and distribution and recovery operations of the materials.

[0008] Preferably, the grab assembly includes a moving block, an electric cylinder and a palm plate. The moving block moves horizontally and fits on the side of the guide box. The electric cylinder is vertically fixed on the side of the moving block away from the guide box. A push rod is provided at the bottom of the electric cylinder. The palm plate is horizontally fixed at the bottom of the push rod. Several finger plates are horizontally installed around the palm plate. The bottom of several finger plates away from one end of the palm plate are vertically installed with electric vacuum suction cups. The moving block moves horizontally and fits on the side of the guide box, providing a horizontal movement basis for the entire grab assembly, so that it can move accurately left and right on the guide box to align with different target positions. The electric cylinder is vertically fixed on the side of the moving block away from the guide box, and the vertical movement control is realized through the push rod inside it. The extension and retraction of the push rod can drive the palm plate to move up and down, thereby adjusting the height of the palm plate and the finger plates and electric vacuum suction cups installed thereon to adapt to different thicknesses of conference materials. The palm plate is horizontally fixed at the bottom of the electric cylinder push rod, serving as the main support platform of the grab assembly, and the several finger plates horizontally installed around it play a role in expanding the grab range and increasing the grab stability. An electric vacuum suction cup is vertically installed at the bottom of each fingerboard away from the palm board. These electric vacuum suction cups are the key components for actually performing the grasping action. They generate negative pressure to adsorb meeting materials, thereby achieving the grasping and releasing of materials.

[0009] Preferably, a mounting base is horizontally fixed to one end of the top plate away from the access port, a guide box is horizontally fixed to the top of the mounting base, a slot is provided on the side of the guide box close to the access port, a slide rail is horizontally fixed to the guide box, a first drive belt is provided for horizontal transmission inside the guide box, and a first motor for driving the first drive belt is horizontally installed on one side of the guide box, a slider is connected to the side of the moving block close to the guide box, the slider passes through the slot and slidably cooperates with the slide rail, a connecting plate is fixed to the slider, and the connecting plate is connected to the first transmission belt.

[0010] Preferably, a sliding rod is vertically fixed on the lifting frame, a screw rod is vertically rotated on the lifting frame, a second transmission belt is provided for transmission at the bottom of the lifting frame, a second motor is vertically fixed to one side of the bottom of the lifting frame to drive the screw rod to rotate through the second transmission belt, a sliding sleeve and a nut are welded on the side of the lifting plate away from the support rod, the sliding sleeve is mounted on the sliding rod and slidably cooperates with the sliding rod, and the nut is threadedly engaged with the screw rod.

[0011] Preferably, a groove is provided on the top of the fixed base, and the groove is divided into an upper groove and a lower groove, the width of the upper groove is greater than that of the lower groove, and the overall cross-section of the groove is an inverted "T"-shaped structure, and the fixed base is located on both sides of the lower groove inner wall installed with support plates, and the two support plates are rotatably matched with a row of first rollers with the same height on opposite sides, groove rails are welded on both sides of the top of the first-level telescopic plate, and rail grooves are provided on both sides of the groove rails, and the cross-section of the groove rails is an "I"-shaped structure, and the two rows of first rollers are respectively rollingly matched in the two rail grooves on the far side of the two groove rails, and the two rows of second rollers are rotatably matched at the bottom of the second-level telescopic plate, and the two rows of second rollers are respectively rollingly matched in the two rail grooves on the close side of the two groove rails.

[0012] Preferably, a primary transmission tooth plate is welded to the bottom of the primary telescopic plate, a power gear that rotates and meshes with the primary transmission tooth plate is rotatably mounted on the fixed base, a third transmission belt is transmission-coordinated on the fixed base, and a third motor that drives the power gear to rotate through the third transmission belt is installed on the fixed base.

[0013] Preferably, the fixed base is located below the primary telescopic plate and is horizontally fixed with a power toothed plate, the bottom of the secondary telescopic plate is located above the primary telescopic plate and is horizontally fixed with a secondary transmission toothed plate, and the center of the primary telescopic plate is horizontally rotated with a transmission gear, and the transmission gear is kept in meshing state with the power toothed plate and the secondary transmission toothed plate at the same time. After the third motor is started, the power gear is driven to rotate through the third transmission belt. Since the power gear is meshed with the primary transmission toothed plate at the bottom of the primary telescopic plate, the rotation of the power gear drives the primary telescopic plate to move along the fixed base. During the movement, the groove rails on both sides of the top of the primary telescopic plate cooperate with the first rollers on the support plates on the inner walls of both sides of the fixed base, and the first rollers roll in the grooves of the groove rails to play a supporting and guiding role, thereby ensuring the stability of the movement of the primary telescopic plate. When the primary telescopic plate moves, the primary transmission toothed plate at its bottom drives the power gear meshed with it to rotate. At the same time, the transmission gear that is horizontally rotated at the center of the primary telescopic plate is kept in meshing state with the power toothed plate horizontally fixed on the fixed base and the secondary transmission toothed plate horizontally fixed at the bottom of the secondary telescopic plate. When the primary telescopic plate moves, the transmission gear rolls and rotates on the power tooth plate, and drives the secondary telescopic plate to move in the same direction by meshing with the secondary transmission tooth plate. The second roller at the bottom of the secondary telescopic plate rolls in the groove of the groove track at the top of the primary telescopic plate, further ensuring the stability of the movement of the secondary telescopic plate. When the primary telescopic plate and the secondary telescopic plate move synchronously, the pallet supported on the top of the secondary telescopic plate is sent out or retracted into the cabinet structure composed of a mobile base, a top plate and four cabinet plates. When it is necessary to place conference materials on the pallet, the third motor drives in the reverse direction, so that the primary telescopic plate and the secondary telescopic plate drive the pallet to be retracted into the cabinet structure. Conversely, when it is necessary to send the conference materials on the pallet for distribution or recycling, the third motor drives forward, so that the pallet is sent out of the cabinet structure. After the pallet is retracted into the cabinet structure, the second motor on the lifting stand drives the screw to rotate through the second transmission belt, thereby driving the lifting plate to rise, so that the support rod lifts the pallet upward and lifts it to the access port so that the grabbing component can perform the grabbing operation. During the data recovery process, as the amount of data on the pallet gradually increases, the lifting plate will drop as needed to adjust the height of the pallet to ensure that the grabbing components can smoothly absorb and recover the data on the conference table.

[0014] Preferably, a plurality of support blocks are vertically fixed on the top of the secondary telescopic plate, and a plurality of positioning grooves are provided at the bottom of the support plate. The positions of the plurality of positioning grooves correspond to the positions of the plurality of support blocks one by one, and the positioning grooves are adapted to the sizes of the support blocks, and the support blocks are supported in the positioning grooves. A plurality of support blocks are vertically fixed on the top of the secondary telescopic plate, and these support blocks provide stable support points for the support plate. The plurality of positioning grooves provided at the bottom of the support plate correspond to the positions of the support blocks one by one, and are adapted to the sizes, so that the support plate can be accurately placed on the secondary telescopic plate and remain stable through the support of the support blocks.

[0015] Preferably, two brackets are welded and fixed to the bottom of the pallet, and the cross-sections of the two brackets are both "U"-shaped structures, and the positions of the two brackets correspond to the positions of the two bracket rods. The two brackets welded and fixed to the bottom of the pallet have a "U"-shaped structure in cross-section, corresponding to the positions of the two bracket rods on the lifting stand. When the pallet and the conference materials on it need to be raised or lowered, the bracket rods are inserted into the corresponding brackets, and through the lifting movement of the lifting stand, the bracket rods drive the pallet to achieve vertical movement.

[0016] Beneficial effects of the present invention:

[0017] (1) In the present invention, the conference materials distribution and recovery device has a sophisticated structure, powerful functions, and has an efficient and convenient data distribution function. The core lies in the close cooperation between the grabbing component and the pick-up and placement pushing component. During use, the third motor in the pick-up and placement pushing component drives the power gear to rotate through the third transmission belt, and the power gear engages with the primary transmission gear plate to drive the primary telescopic plate to move. When the primary telescopic plate moves, the transmission gear moves accordingly and rotates due to engagement with the fixed power gear plate, and then drives the secondary telescopic plate to move in the same direction through engagement with the secondary transmission gear plate. In this way, the primary telescopic plate and the secondary telescopic plate act synchronously to accurately send the pallet out of the cabinet structure composed of the mobile base, the top plate and the surrounding cabinet plates. After the conference organizer places the materials on the pallet, the telescopic plate moves in the opposite direction and the pallet is retracted into the cabinet. At this time, the second motor drives the screw to rotate through the second transmission belt, and the nut rises along the screw, driving the lifting plate to rise, so that the support rod supports the pallet to the access port. The first motor drives the first transmission belt to move the moving block and adjust the position of the grabbing component to the access port. The electric cylinder drives the palm plate to descend, and the electric vacuum suction cup absorbs the data. Subsequently, the push handle pushes the device, and the universal wheel assists in moving, so that one end of the guide box remains above the conference table. The first motor drives again to send the grabbing component to the top of the conference table, release the data, and complete the single data distribution. During the process of pushing the device, the grabbing component continues to move and absorb the data for distribution. After each grab, the lifting plate rises to adjust the height of the pallet to ensure that the data is always at a grabbable height. This series of actions is closely connected and highly automated, which greatly saves the time and energy of manual data distribution, avoids possible omissions or errors in manual distribution, and significantly improves the efficiency of the meeting preparation stage, so that the meeting can start more punctually and orderly. The device not only performs well in data distribution, but also has a flexible and reliable data recovery function, which provides great convenience for data sorting after the meeting. After the meeting, the operator only needs to place the recovered meeting materials on the conference table, and then push the device to move, so that one end of the guide box remains above the conference table. The first motor drives the grabbing component to move above the conference table, and the electric vacuum suction cup absorbs the meeting materials and sends them to the pallet at the access port. As the recycling process continues, the support rod continuously adjusts the height of the pallet downward according to the amount of materials on the pallet to accommodate more recycled materials. When all the materials are recycled, the support rod lowers the pallet to the top of the secondary telescopic plate, and through the synchronous movement of the primary telescopic plate and the secondary telescopic plate, the pallet with recycled materials is smoothly sent out of the cabinet structure for the meeting person in charge to take away. This recycling process is highly automated and easy to operate, which can effectively avoid the tedious and inefficient manual collection of materials page by page, saving a lot of time and labor costs for the subsequent sorting of the meeting.

[0018] (2) In the present invention, the grabbing assembly of the device is exquisitely designed and can achieve accurate and stable data grabbing and placement. The grabbing assembly includes a moving block, an electric cylinder and a palm plate. The moving block moves horizontally on the side of the guide box and is pulled by the first transmission belt for accurate positioning. The electric cylinder is vertically fixed on the moving block, and its push rod drives the palm plate to move up and down. The height of the palm plate and the electric vacuum suction cup can be accurately adjusted to adapt to conference materials of different thicknesses. Multiple finger plates are evenly distributed around the palm plate, and an electric vacuum suction cup is installed at the bottom of the finger plate. This multi-point adsorption design can ensure that the data is flat and stable when being grabbed, and prevent the data from slipping or tilting. During the data distribution process, when the data on the tray is sent to the access port, the grabbing assembly moves to the top of the data, the electric cylinder drives the palm plate to descend, and the electric vacuum suction cup contacts the surface of the data and adsorbs it. After the adsorption is completed, the grabbing assembly moves to the specified position above the conference table, and the electric cylinder drives the palm plate to rise to accurately place the data on the conference table. The entire grabbing and placing process is smooth and precise, thanks to the close coordination and precise control of all components, ensuring that every piece of conference material can be accurately distributed to the participants, improving the professionalism and standardization of the meeting, and avoiding meeting delays or confusion that may be caused by errors in material distribution.

[0019] (3) In the present invention, the device as a whole adopts a cabinet structure composed of a mobile base, a top plate and cabinet panels on all sides, which not only ensures the stability of the equipment, but also takes into account the flexibility of movement. Universal wheels are installed at the four corners of the bottom of the mobile base, so that the device can be easily moved in the conference venue to adapt to different conference layouts and venue requirements. The top plate is arranged in parallel with the mobile base, and cabinet panels are installed on all sides to form a closed cabinet, which not only provides a safe storage space for conference materials, but also effectively protects the internal mechanical components from external collisions or damage. A push handle is installed at one end of the top plate away from the access port to facilitate the operator to push the device. During the movement process, the flexibility of the universal wheel and the stability of the cabinet structure complement each other, ensuring that the device moves smoothly and smoothly, and the internal materials or components will not be displaced or damaged due to shaking. In addition, the design of the cabinet structure also facilitates the storage and transportation of the device, so that it can be neatly placed in a designated location when not in use, saving space and keeping the conference environment clean and tidy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the present invention after the cabinet panel and the push handle are removed as a whole.

[0023] Figure 3 It is a schematic diagram of the guide box structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the grabbing component of the present invention.

[0025] Figure 5 for Figure 2 A magnified detail of area A.

[0026] Figure 6 This is a schematic diagram of the structure of the pick-up, place and push component of the present invention.

[0027] Figure 7 It is a schematic diagram of the matching structure of the fixing seat and the primary telescopic plate of the present invention.

[0028] Figure 8 It is a schematic diagram of the cooperation structure of the secondary telescopic plate and the supporting plate of the present invention.

[0029] Fig. 9 It is a bottom view of the support plate of the present invention.

[0030] In the figure: 1, mobile base; 101, universal wheel; 2, support column; 3, top plate; 301, access port; 4, mounting base; 5, guide box; 501, slot; 502, slide rail; 503, first transmission belt; 504, first motor; 6, grab assembly; 601, moving block; 602, slider; 603, connecting plate; 604, electric cylinder; 605, palm plate; 606, finger plate; 607, electric vacuum suction cup; 7, lifting stand; 701, slide rod; 702, lead screw; 703, second transmission belt; 704, second motor; 705, lifting plate; 706, sliding sleeve; 707 , nut; 708, support rod; 8, pick-up and place pushing assembly; 801, fixed base; 8011, support plate; 8012, first roller; 8013, power gear; 8014, third transmission belt; 8015, third motor; 8016, power tooth plate; 802, first telescopic plate; 8021, groove rail; 8022, first transmission tooth plate; 8023, transmission gear; 803, second telescopic plate; 8031, second roller; 8032, second transmission tooth plate; 8033, support block; 804, support plate; 8041, positioning groove; 8042, support card; 9, cabinet board; 10, push handle. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figure 1-Figure 9As shown, a conference material distribution and recovery device described in the present invention includes a mobile base 1, a guide box 5, a grabbing assembly 6 and a pick-and-place pushing assembly 8. A support column 2 is vertically fixed at one end of the top of the mobile base 1, a top plate 3 is horizontally fixed on the top of the support column 2, an access port 301 is opened at one end of the top plate 3, the guide box 5 is horizontally arranged at the end of the top of the top plate 3 away from the access port 301, the grabbing assembly 6 is movably matched on the side of the guide box 5 close to the access port 301, and the pick-and-place pushing assembly 8 includes a fixed base 801, a primary telescopic plate 802 and a secondary telescopic plate 803. The fixed base 801 is fixed on the top of the mobile base 1 and is located directly below the access port 301. The primary telescopic plate 802 is movably matched on the mobile base 1, and the secondary telescopic plate 803 is movably matched on the primary telescopic plate 802, and the secondary telescopic plate 803 and the primary telescopic plate 802 move synchronously. The top of the secondary telescopic plate 803 supports a pallet 804 for placing conference materials. The mobile base 1 serves as the basis of the entire device and supports the weight of all other components. The support column 2 is vertically fixed to one end of the top of the mobile base 1, playing a key role in connecting the mobile base 1 and the top plate 3, providing a stable support force for the top plate 3, and ensuring that the top plate 3 remains horizontal and does not shake during use. The top plate 3 is horizontally fixed to the top of the support column 2, and the access port 301 opened at one end is the core channel for conference materials to enter and exit the device, so that the materials can be smoothly transferred between the inside and outside of the device. The stable structure of the support column 2 and the top plate 3 provides a reliable installation foundation for various components on the top of the device, ensuring that the entire device can remain stable during the distribution and recovery of materials, and will not shake or move due to movement or operation, thereby improving the accuracy and safety of data transmission. The design of the access port 301 provides the possibility of automatic access to materials, so that the materials can enter and exit the device in an orderly manner, creating conditions for subsequent operations such as grabbing, distribution and recovery. The guide box 5 is horizontally installed at one end of the top of the top plate 3 away from the access port 301, providing a directional track and support for the movement of the grabbing component 6. The grabbing assembly 6 moves and cooperates on the side of the guide box 5 close to the access port 301. Through the guidance of the guide box 5, it can ensure that the grabbing assembly 6 moves accurately to the preset position in the horizontal direction, so as to accurately align with the conference materials at the access port 301 or the target position on the conference table, and realize the grabbing and placing operations of the materials. The setting of the guide box 5 makes the movement of the grabbing assembly 6 more stable and accurate. During the material distribution process, the grabbing assembly 6 can move smoothly along the guide box 5 to the top of the conference table, ensuring that the conference materials are accurately placed on the desktop every time, avoiding the placement error or damage of the materials due to position deviation. When the materials are recovered, the grabbing assembly 6 can also move accurately to the top of each conference table, absorb and retrieve the materials, and improve the recovery efficiency and accuracy.The pick-and-place push assembly 8 is composed of a fixed base 801, a first-level telescopic plate 802 and a second-level telescopic plate 803, wherein the fixed base 801 is fixed on the top of the mobile base 1 and is located directly below the access port 301, providing a stable installation foundation for the entire pick-and-place push assembly 8. The first-level telescopic plate 802 moves and cooperates on the mobile base 1, and the second-level telescopic plate 803 moves and cooperates on the first-level telescopic plate 802, and the two keep moving synchronously. The pallet 804 supported on the top of the second-level telescopic plate 803 is used to place conference materials. Through the synchronous telescopic action of the first-level telescopic plate 802 and the second-level telescopic plate 803, the pallet 804 and the conference materials thereon can be pushed inside and outside the cabinet structure composed of the mobile base 1, the top plate 3 and the cabinet plate 9 to realize the access of materials. The design of the pick-and-place push assembly 8 realizes the automatic access of conference materials and greatly improves work efficiency. Before the data is distributed, the pallet 804 can be smoothly sent out of the cabinet structure through the synchronous movement of the telescopic plate, which is convenient for the conference organizer to place the conference materials. After placing, the pallet 804 is returned to the cabinet by the reverse movement of the telescopic plate, so as to prepare for the subsequent data distribution. When the data is recovered, the telescopic plate sends the pallet 804 out again, and the person in charge of the meeting can directly take the recovered data from the pallet 804. The synchronous design of the first telescopic plate 802 and the second telescopic plate 803 ensures the stability of the pallet 804 during the movement and protects the integrity of the conference data.

[0033] Among them, a lifting frame 7 is vertically fixed at the bottom of the top plate 3, and one side of the lifting frame 7 is lifted and lowered to cooperate with the lifting plate 705. Two supporting rods 708 that can lift the support plate 804 and lift it upward to the access port 301 are horizontally fixed on one side of the lifting plate 705. The lifting frame 7 fixed vertically at the bottom of the top plate 3 provides a stable vertical guide and support for the lifting and lowering movement of the lifting plate 705. One side of the lifting frame 7 is lifted and lowered in cooperation with the lifting plate 705, and the lifting plate 705 is driven to move up and down along the lifting frame 7 through the internal transmission mechanism. The two supporting rods 708 horizontally fixed on one side of the lifting plate 705 are components that directly contact the support plate 804. When the lifting plate 705 rises, the supporting rods 708 lift the support plate 804 and lift it upward to the access port 301, so that the conference materials on the support plate 804 can reach a suitable height, which is convenient for the grabbing component 6 to perform the grabbing operation. This setting enables the height of the support plate 804 to be automatically adjusted as needed, greatly improving the flexibility and adaptability of the device. During the distribution of conference materials, after the support plate 804 is sent into the cabinet structure, the lifting stand 7 drives the lifting plate 705 to rise, and the support rod 708 then lifts the support plate 804 to the access port 301, ensuring that the materials are at a height position where the grabbing component 6 can accurately grab them. No matter how the thickness of the materials changes, the height of the support plate 804 can be adjusted to adapt, ensuring the smooth progress of the distribution process. At the same time, when the materials are recovered, as the amount of materials gradually decreases, the lifting plate 705 can be lowered to keep the support plate 804 at a suitable height so that the grabbing component 6 can smoothly absorb and recover the materials on the conference table. This automatic height adjustment function not only improves work efficiency, but also reduces manual intervention.

[0034] A further improvement of this embodiment is that universal wheels 101 are installed at the four corners of the bottom of the mobile base 1, and the flexible movement of the device in the conference venue is achieved through the universal wheels 101 at the bottom. A push handle 10 is installed at one end of the top plate 3 away from the access port 301, and the top plate 3 is arranged in parallel with the mobile base 1. Cabinet plates 9 are installed on the four peripheral sides of the top plate 3 and the mobile base 1. The top plate 3, the mobile base 1 and the four cabinet plates 9 are integrally formed into a box cabinet structure. The cabinet plate 9 near one end of the pick-up and push assembly 8 of the box cabinet structure is provided with a window that allows the first-level telescopic plate 802, the second-level telescopic plate 803, the support plate 804 and the conference materials placed on the support plate 804 to pass through. The mobile base 1 serves as the basic support of the entire device, and the universal wheels 101 installed at the four corners of its bottom enable the device to be flexibly moved to adapt to the location requirements of different conference venues. The push handle 10 installed at one end of the top plate 3 away from the access port 301 provides a force point for the operator to facilitate pushing the device. The top plate 3 is arranged in parallel with the mobile base 1, ensuring the overall stability and horizontality of the device. The cabinet panels 9 installed on the four sides of the top plate 3 and the mobile base 1 form a cabinet structure, which provides protection and storage space for internal components and conference materials. The window opened on the cabinet panel 9 near one end of the pick-up and push assembly 8 of the cabinet structure is for the smooth passage of the primary telescopic plate 802, the secondary telescopic plate 803, the support plate 804 and the conference materials placed on the support plate 804, so as to realize the automatic access and distribution and recovery operations of the materials. The cooperation between the mobile base 1 and the universal wheel 101 makes the device have good maneuverability, and can be easily moved to the desired position in the conference room, saving manpower and time costs. The setting of the push handle 10 further improves the operability of the device, and the operator can easily push the device to move. The parallel arrangement of the top plate 3 and the mobile base 1 and the installation of the cabinet plate 9 form a stable cabinet structure, which not only protects the internal mechanical components and conference materials, prevents external collision and interference, but also makes the entire device look neater and more beautiful, and improves the professionalism and standardization of the equipment. The opening of the window is the key to the entire cabinet structure design, which ensures that the first-level telescopic plate 802, the second-level telescopic plate 803 and the support plate 804 can smoothly enter and exit the cabinet when accessing materials, and limits the access range of the materials.

[0035] The further improvement of this embodiment is that the grabbing assembly 6 includes a moving block 601, an electric cylinder 604 and a palm plate 605, the moving block 601 moves horizontally and cooperates with the side of the guide box 5, the electric cylinder 604 is vertically fixed on the side of the moving block 601 away from the guide box 5, a push rod is provided at the bottom of the electric cylinder 604, the palm plate 605 is horizontally fixed at the bottom of the push rod, a plurality of finger plates 606 are horizontally installed around the palm plate 605, and an electric vacuum suction cup 607 is vertically installed at the bottom of the end of the plurality of finger plates 606 away from the palm plate 605. The moving block 601 moves horizontally and cooperates with the side of the guide box 5, providing a horizontal movement foundation for the entire grabbing assembly 6, so that it can accurately move left and right on the guide box 5 to align with different target positions. The electric cylinder 604 is vertically fixed on the side of the moving block 601 away from the guide box 5, and the vertical movement control is realized through the push rod inside it. The extension and retraction of the push rod can drive the palm plate 605 to move up and down, thereby adjusting the height of the palm plate 605 and the finger plate 606 and electric vacuum suction cup 607 installed thereon to adapt to conference materials of different thicknesses. The palm plate 605 is horizontally fixed at the bottom end of the push rod of the electric cylinder 604, serving as the main support platform of the grasping component 6. The several finger plates 606 installed horizontally on its side play a role in expanding the grasping range and increasing the grasping stability. The bottom of each finger plate 606 away from the palm plate 605 is vertically installed with an electric vacuum suction cup 607. These electric vacuum suction cups 607 are the key components for actually performing the grasping action, and the grasping and release of the materials are achieved by generating negative pressure to adsorb the conference materials. The cooperation between the moving block 601 and the guide box 5 ensures the precise movement of the grabbing component 6 in the horizontal direction, so that it can accurately align with the conference materials at the access port 301 or the target position on the conference table, improving the accuracy of data distribution and recovery. The setting of the electric cylinder 604 enables the grabbing component 6 to have flexible adjustment capabilities in the vertical direction, and can adapt to conference materials of different thicknesses. Whether it is a single page of paper or a multi-page bound material book, it can be accurately grasped, expanding the scope of application of the device. The design of the palm plate 605 and the finger plate 606 increases the contact area between the grabbing component 6 and the conference materials, and the distribution of multiple electric vacuum suction cups 607 further improves the stability and reliability of grasping. Even if the surface of the material is slightly uneven, it can be firmly adsorbed, avoiding the situation that the material slips or deflects during the grasping process, ensuring the smooth progress of the distribution and recovery process, and improving the work efficiency and intelligence level of the entire device.

[0036] A further improvement of this embodiment is that a mounting base plate 4 is horizontally fixed to one end of the top of the top plate 3 away from the access port 301, a guide box 5 is horizontally fixed to the top of the mounting base plate 4, a slot hole 501 is provided on the side of the guide box 5 close to the access port 301, a slide rail 502 is horizontally fixed to the guide box 5, a first transmission belt 503 is provided for horizontal transmission inside the guide box 5, and a first motor 504 that drives the first transmission belt 503 is horizontally installed on one side of the guide box 5, a sliding block 602 is connected to the side of the moving block 601 close to the guide box 5, the sliding block 602 passes through the slot hole 501 and slidably cooperates with the sliding rail 502, a connecting plate 603 is fixed to the sliding block 602, and the connecting plate 603 is connected to the first transmission belt 503.

[0037] A further improvement of this embodiment is that a sliding rod 701 is vertically fixed on the lifting frame 7, a screw rod 702 is vertically rotated on the lifting frame 7, a second transmission belt 703 is provided for transmission at the bottom of the lifting frame 7, a second motor 704 is vertically fixed on one side of the bottom of the lifting frame 7 to drive the screw rod 702 to rotate through the second transmission belt 703, a sliding sleeve 706 and a nut 707 are welded on the side of the lifting plate 705 away from the supporting rod 708, the sliding sleeve 706 is sleeved on the sliding rod 701 and slidably cooperates with the sliding rod 701, and the nut 707 is threadedly engaged on the screw rod 702.

[0038] A further improvement of the present embodiment is that a groove is provided on the top of the fixed base 801, and the groove is divided into an upper groove and a lower groove. The width of the upper groove is greater than that of the lower groove, and the overall cross-section of the groove is an inverted "T"-shaped structure. Support plates 8011 are installed on the inner walls of both sides of the fixed base 801 located at the lower groove, and the two support plates 8011 are rotatably matched on opposite sides with a row of first rollers 8012 of the same height. Grooved rails 8021 are welded on both sides of the top of the first-level telescopic plate 802, and rail grooves are provided on both sides of the groove rails 8021. The cross-section of the groove rails 8021 is an "I"-shaped structure. The two rows of first rollers 8012 are respectively rollingly matched in the two rail grooves on the far side of the two groove rails 8021. The bottom of the second-level telescopic plate 803 is rotatably matched with two rows of second rollers 8031, and the two rows of second rollers 8031 ​​are respectively rollingly matched in the two rail grooves on the close side of the two groove rails 8021.

[0039] A further improvement of this embodiment is that a primary transmission tooth plate 8022 is welded to the bottom of the primary telescopic plate 802, a power gear 8013 that is rotatably engaged with the primary transmission tooth plate 8022 is provided on the fixed base 801, a third transmission belt 8014 is provided on the fixed base 801 for transmission, and a third motor 8015 that drives the power gear 8013 to rotate through the third transmission belt 8014 is installed on the fixed base 801.

[0040] A further improvement of this embodiment is that a power tooth plate 8016 is horizontally fixed to the fixed base 801 below the primary telescopic plate 802, a secondary transmission tooth plate 8032 is horizontally fixed to the bottom of the secondary telescopic plate 803 above the primary telescopic plate 802, and a transmission gear 8023 is matched with the horizontal rotation at the center of the primary telescopic plate 802, and the transmission gear 8023 is kept in meshing state with the power tooth plate 8016 and the secondary transmission tooth plate 8032 at the same time. After the third motor 8015 is started, the power gear 8013 is driven to rotate through the third transmission belt 8014. Since the power gear 8013 is meshed with the primary transmission tooth plate 8022 at the bottom of the primary telescopic plate 802, the rotation of the power gear 8013 drives the primary telescopic plate 802 to move along the fixed base 801. During the movement, the groove rails 8021 on both sides of the top of the primary telescopic plate 802 cooperate with the first rollers 8012 on the support plates 8011 on the inner walls of the fixed base 801 on both sides. The first rollers 8012 roll in the grooves of the groove rails 8021 to support and guide the movement of the primary telescopic plate 802. When the primary telescopic plate 802 moves, the primary transmission tooth plate 8022 at the bottom drives the power gear 8013 meshed with it to rotate. At the same time, the transmission gear 8023 at the center of the primary telescopic plate 802, which rotates horizontally, keeps meshing with the power tooth plate 8016 fixed horizontally on the fixed base 801 and the secondary transmission tooth plate 8032 fixed horizontally at the bottom of the secondary telescopic plate 803. When the primary telescopic plate 802 moves, the transmission gear 8023 rolls and rotates on the power tooth plate 8016, and drives the secondary telescopic plate 803 to move in the same direction through meshing with the secondary transmission tooth plate 8032. The second roller 8031 ​​at the bottom of the secondary telescopic plate 803 rolls in the track groove of the groove track 8021 at the top of the primary telescopic plate 802, further ensuring the stability of the movement of the secondary telescopic plate 803. When the primary telescopic plate 802 and the secondary telescopic plate 803 move synchronously, the support plate 804 supported on the top of the secondary telescopic plate 803 is sent out or retracted into the cabinet structure composed of the mobile base 1, the top plate 3 and the four cabinet plates 9. When it is necessary to place conference materials on the support plate 804, the third motor 8015 drives in reverse, so that the primary telescopic plate 802 and the secondary telescopic plate 803 drive the support plate 804 to be retracted into the cabinet structure. On the contrary, when it is necessary to send out the conference materials on the support plate 804 for distribution or recovery, the third motor 8015 drives in the forward direction, so that the support plate 804 is sent out of the cabinet structure. After the pallet 804 is retracted into the cabinet structure, the second motor 704 on the lifting frame 7 drives the screw rod 702 to rotate through the second transmission belt 703, thereby driving the lifting plate 705 to rise, so that the support rod 708 lifts the pallet 804 upward and lifts it to the access port 301, so that the grabbing component 6 can perform the grabbing operation.During the data recovery process, as the data on the support plate 804 gradually increases, the lifting plate 705 will be lowered as needed to adjust the height of the support plate 804 to ensure that the grabbing component 6 can smoothly absorb and recover the data on the conference table.

[0041] A further improvement of this embodiment is that a plurality of support blocks 8033 are vertically fixed on the top of the secondary telescopic plate 803, and a plurality of positioning grooves 8041 are provided at the bottom of the support plate 804. The positions of the plurality of positioning grooves 8041 correspond to the positions of the plurality of support blocks 8033 one by one, and the positioning grooves 8041 are adapted to the sizes of the support blocks 8033, and the support blocks 8033 are supported in the positioning grooves 8041. A plurality of support blocks 8033 are vertically fixed on the top of the secondary telescopic plate 803, and these support blocks 8033 provide stable support points for the support plate 804. The plurality of positioning grooves 8041 provided at the bottom of the support plate 804 correspond to the positions of the support blocks 8033 one by one, and are adapted to the sizes, so that the support plate 804 can be accurately placed on the secondary telescopic plate 803, and is kept stable by the support of the support blocks 8033. This design ensures that the support plate 804 will not shake or deflect during movement and stillness, and ensures the stable placement and transmission of conference materials. The cooperation between the support block 8033 and the positioning groove 8041 improves the stability and positioning accuracy of the support plate 804. During the distribution and recovery of materials, the support plate 804 needs to perform frequent telescopic movements driven by the secondary telescopic plate 803. Through this precise support and positioning, the support plate 804 can always remain stable, avoiding the sliding or damage of conference materials caused by the shaking of the support plate 804. At the same time, this design also facilitates the installation and replacement of the support plate 804, improving the maintenance convenience of the equipment. In addition, the support block 8033 and the positioning groove 8041 have a simple structure and low cost, but can effectively improve the reliability and service life of the entire device, ensuring the efficient distribution and recovery of conference materials.

[0042] A further improvement of this embodiment is that two support cards 8042 are welded and fixed at the bottom of the pallet 804. The cross-sections of the two support cards 8042 are both "U"-shaped structures, and the positions of the two support cards 8042 correspond to the positions of the two support rods 708. The two support cards 8042 welded and fixed at the bottom of the pallet 804 have a "U"-shaped structure in cross-section, which corresponds to the positions of the two support rods 708 on the lifting frame 7. When the pallet 804 and the conference materials thereon need to be lifted or lowered, the support rods 708 are inserted into the corresponding support cards 8042, and through the lifting movement of the lifting frame 7, the support rods 708 drive the pallet 804 to move in the vertical direction. This design ensures that the pallet 804 has accurate positioning and stable support during the lifting process. The cooperation between the support cards 8042 and the support rods 708 improves the stability and precision of the pallet 804 when it is lifted or lowered. During the distribution of conference materials, after the support plate 804 is sent into the cabinet structure, the support rod 708 can be accurately inserted into the support card 8042, lifting the support plate 804 and lifting it to the access port 301, ensuring that the grabbing assembly 6 can smoothly grab the conference materials. When the materials are recovered, the support rod 708 can also stably support the support plate 804, so that it will not shake or deflect during the lifting process, ensuring the smooth recovery of the materials. In addition, this structural design is simple but effective, can withstand conference materials of different weights, improves the practicality and reliability of the device, and is easy to install and maintain, extending the service life of the equipment.

[0043] When in use, first, the conference organizer needs to place the conference materials on the support plate 804. At this time, the third motor 8015 in the pick-and-place push assembly 8 drives the power gear 8013 to rotate through the third transmission belt 8014, and the power gear 8013 engages with the first transmission tooth plate 8022 at the bottom of the first telescopic plate 802, driving the first telescopic plate 802 to move along the fixed base 801. When the first telescopic plate 802 moves, the groove rails 8021 on both sides of its top cooperate with the first rollers 8012 on the support plates 8011 on the inner walls of both sides of the fixed base 801, ensuring the stability of the movement of the first telescopic plate 802. At the same time, the first transmission tooth plate 8022 at the bottom of the first telescopic plate 802 drives the transmission gear 8023 to roll and rotate on the power tooth plate 8016, and drives the second telescopic plate 803 to move in the same direction through engagement with the second transmission tooth plate 8032. The second roller 8031 ​​at the bottom of the secondary telescopic plate 803 rolls in the track groove of the groove track 8021 at the top of the primary telescopic plate 802, further ensuring the stability of the movement of the secondary telescopic plate 803. When the primary telescopic plate 802 and the secondary telescopic plate 803 move synchronously, the pallet 804 at the top of the secondary telescopic plate 803 is sent out of the cabinet structure composed of the mobile base 1, the top plate 3 and the four cabinet plates 9, and the conference organizer can neatly place the conference materials to be distributed on the pallet 804. After placement, the third motor 8015 drives in the reverse direction, so that the primary telescopic plate 802 and the secondary telescopic plate 803 drive the pallet 804 to be retracted into the cabinet structure, ready for the distribution of materials.

[0044] Then, the conference materials are distributed. At this time, the second motor 704 drives the screw rod 702 to rotate through the second transmission belt 703, thereby driving the lifting plate 705 to rise, so that the support rod 708 lifts the support plate 804 upward and lifts it to the access port 301. The support card 8042 at the bottom of the support plate 804 corresponds to the position of the support rod 708, and the support rod 708 is inserted into the support card 8042 to ensure that the support plate 804 is stable during the lifting process. When the support plate 804 reaches the access port 301, the first motor 504 drives the first transmission belt 503 to transmit, and the first transmission belt 503 pulls the slider 602 to move, thereby driving the moving block 601 to move along the guide box 5, adjusting the position of the grabbing assembly 6, so that the grabbing assembly 6 is located at the access port 301. The electric cylinder 604 drives the palm plate 605 to descend, and the electric vacuum suction cup 607 absorbs the conference materials above the support plate 804. The operator pushes the device through the push handle 10, and the universal wheel 101 at the bottom of the mobile base 1 ensures that the device can move smoothly, so that one end of the guide box 5 remains above the conference table. The grabbing component 6 moves on the guide box 5, places the adsorbed conference materials on the conference table, and completes the distribution of a set of conference materials. After each time the grabbing component 6 takes away a set of conference materials, the second motor 704 drives the lifting plate 705 to rise again, so that the support plate 804 supported by the support rod 708 moves upward, ensuring that the remaining conference materials on the support plate 804 are always at a height that the grabbing component 6 can reach, so as to continue to distribute the materials until all the materials are distributed.

[0045] Finally, after the meeting, the materials are recovered. At this time, the conference materials are placed on the conference table, and then the push device is moved so that one end of the guide box 5 remains above the conference table. The first motor 504 drives the grab assembly 6 to move above the conference table, and the electric vacuum suction cup 607 absorbs the conference materials and delivers them to the pallet 804 at the access port 301. As the recovery process continues, the support rod 708 continuously adjusts the height of the pallet 804 downward according to the amount of materials on the pallet 804 to accommodate more recovered materials. When all the materials are recovered, the support rod 708 lowers the pallet 804 to the top of the secondary telescopic plate 803, and the third motor 8015 drives again, driving the power gear 8013 to rotate through the third transmission belt 8014, so that the primary telescopic plate 802 and the secondary telescopic plate 803 move synchronously, and the pallet 804 containing the recovered materials is smoothly sent out of the cabinet structure, and the person in charge of the meeting can take the recovered conference materials from the pallet 804, completing the entire process of distributing and recovering conference materials.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A conference material distribution and recovery device, comprising a mobile base (1), a guide box (5), a grabbing component (6) and a pick-and-place pushing component (8), characterized in that: A support column (2) is vertically fixed to one end of the top of the mobile base (1), a top plate (3) is horizontally fixed to the top of the support column (2), an access opening (301) is provided at one end of the top plate (3), the guide box (5) is horizontally arranged at the end of the top of the top plate (3) away from the access opening (301), the grabbing assembly (6) is movably matched to a side of the guide box (5) close to the access opening (301), and the pick-up and placement pushing assembly (8) comprises a fixed base (801), a primary telescopic plate (802) and a secondary telescopic plate (803), the fixed base (801) being fixed on the top of the mobile base (1) and being located directly below the access port (301), the primary telescopic plate (802) being movably matched on the mobile base (1), the secondary telescopic plate (803) being movably matched on the primary telescopic plate (802), and the secondary telescopic plate (803) and the primary telescopic plate (802) being moved synchronously, and the top of the secondary telescopic plate (803) being supported with a support plate (804) for placing conference materials; A lifting stand (7) is vertically fixed at the bottom of the top plate (3); one side of the lifting stand (7) is lifted and lowered to cooperate with the lifting plate (705); and two supporting rods (708) capable of lifting the supporting plate (804) and lifting it upward to the access port (301) are horizontally fixed on one side of the lifting plate (705).

2. A conference material distribution and recovery device according to claim 1, characterized in that: Universal wheels (101) are installed at the four corners of the bottom of the mobile base (1), a push handle (10) is installed at one end of the top plate (3) away from the access port (301), the top plate (3) and the mobile base (1) are arranged in parallel, and cabinet plates (9) are installed on the four peripheral sides of the top plate (3) and the mobile base (1). The top plate (3), the mobile base (1) and the four cabinet plates (9) are formed into a box-cabinet structure as a whole, and a window is provided on the cabinet plate (9) at one end of the pick-up and placement pushing component (8) to enable the primary telescopic plate (802), the secondary telescopic plate (803), the support plate (804) and the conference materials placed on the support plate (804) to pass through.

3. A conference material distribution and recovery device according to claim 1, characterized in that: The gripping assembly (6) comprises a moving block (601), an electric cylinder (604) and a palm plate (605); the moving block (601) moves horizontally and is matched with the side of the guide box (5); the electric cylinder (604) is vertically fixed on the side of the moving block (601) away from the guide box (5); a push rod is provided at the bottom of the electric cylinder (604); the palm plate (605) is horizontally fixed at the bottom of the push rod; a plurality of finger plates (606) are horizontally installed around the palm plate (605); and electric vacuum suction cups (607) are vertically installed at the bottom of the end of the plurality of finger plates (606) away from the palm plate (605).

4. A conference material distribution and recovery device according to claim 3, characterized in that: A mounting base plate (4) is horizontally fixed to one end of the top plate (3) away from the access opening (301), a guide box (5) is horizontally fixed to the top of the mounting base plate (4), a slot hole (501) is provided on one side of the guide box (5) close to the access opening (301), a slide rail (502) is horizontally fixed to the guide box (5), a first transmission belt (503) is provided for horizontal transmission inside the guide box (5), and a first motor (504) for driving the first transmission belt (503) is horizontally installed on one side of the guide box (5), a sliding block (602) is connected to one side of the moving block (601) close to the guide box (5), the sliding block (602) passes through the slot hole (501) and is slidably matched with the sliding rail (502), a connecting plate (603) is fixed to the sliding block (602), and the connecting plate (603) is connected to the first transmission belt (503).

5. A conference material distribution and recovery device according to claim 1, characterized in that: A sliding rod (701) is vertically fixed on the lifting frame (7), a screw rod (702) is vertically rotated on the lifting frame (7), a second transmission belt (703) is provided at the bottom of the lifting frame (7) for transmission, a second motor (704) is vertically fixed on one side of the bottom of the lifting frame (7) for driving the screw rod (702) to rotate through the second transmission belt (703), a sliding sleeve (706) and a nut (707) are welded on one side of the lifting plate (705) away from the supporting rod (708), the sliding sleeve (706) is sleeved on the sliding rod (701) and slidably cooperates with the sliding rod (701), and the nut (707) is threadedly engaged with the screw rod (702).

6. A conference material distribution and recovery device according to claim 1, characterized in that: A groove is provided on the top of the fixed base (801), and the groove is divided into an upper groove and a lower groove. The width of the upper groove is greater than that of the lower groove, and the overall cross-section of the groove is an inverted "T"-shaped structure. The inner walls of both sides of the fixed base (801) located at the lower groove are both installed with support plates (8011). The two support plates (8011) are rotatably matched with a row of first rollers (8012) with the same height on opposite sides. Grooves are welded on both sides of the top of the first telescopic plate (802). The rail (8021) is provided with rail grooves on both sides of the groove rail (8021), the cross section of the groove rail (8021) is an "I"-shaped structure, two rows of first rollers (8012) are respectively rollingly matched in two rail grooves on the far side of the two groove rails (8021), and the bottom of the secondary telescopic plate (803) is rotatably matched with two rows of second rollers (8031), and the two rows of second rollers (8031) are respectively rollingly matched in two rail grooves on the close side of the two groove rails (8021).

7. A conference material distribution and recovery device according to claim 6, characterized in that: A primary transmission tooth plate (8022) is welded to the bottom of the primary telescopic plate (802); a power gear (8013) meshing with the primary transmission tooth plate (8022) is rotatably matched on the fixed base (801); a third transmission belt (8014) is transmission matched on the fixed base (801); and a third motor (8015) is installed on the fixed base (801) for driving the power gear (8013) to rotate via the third transmission belt (8014).

8. A conference material distribution and recovery device according to claim 7, characterized in that: A power tooth plate (8016) is horizontally fixed on the fixed base (801) below the primary telescopic plate (802), a secondary transmission tooth plate (8032) is horizontally fixed on the bottom of the secondary telescopic plate (803) above the primary telescopic plate (802), a transmission gear (8023) is horizontally rotated at the center of the primary telescopic plate (802), and the transmission gear (8023) is in meshing state with the power tooth plate (8016) and the secondary transmission tooth plate (8032) at the same time.

9. A conference material distribution and recovery device according to claim 1, characterized in that: A plurality of support blocks (8033) are vertically fixed on the top of the secondary telescopic plate (803), and a plurality of positioning grooves (8041) are provided on the bottom of the support plate (804). The positions of the plurality of positioning grooves (8041) correspond to the positions of the plurality of support blocks (8033) one by one, and the positioning grooves (8041) and the support blocks (8033) are adapted in size, and the support blocks (8033) are supported in the positioning grooves (8041).

10. A conference material distribution and recovery device according to claim 1, characterized in that: Two support cards (8042) are welded and fixed to the bottom of the support plate (804), and the cross-sections of the two support cards (8042) are both "U"-shaped structures. The positions of the two support cards (8042) correspond to the positions of the two support rods (708) respectively.

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