Multimedia intelligent blackboard

Abstract

The invention provides a multimedia intelligent blackboard, and relates to the technical field of multimedia electric teaching aids, the multimedia intelligent blackboard comprises a blackboard, a rail bar is arranged above the blackboard in parallel, a rail sliding groove is formed in the side face of the rail bar, two sets of sliding assemblies are arranged on the side face of the rail bar, each sliding assembly comprises a moving box body, and a long connecting rod is rotationally arranged on the side face of the moving box body and located on the opposite face of a box sliding block; the ends of the long connecting rods are provided with rotating pins, the ends of the rotating pins of the two sliding assemblies are symmetrically and rotationally arranged on the frame, a frame sliding strip is arranged in the middle of the frame, a middle sliding body is arranged on the back face of the frame and comprises a middle sliding groove and a middle sliding strip, the frame sliding strip is arranged on the middle sliding groove in a sliding mode, the middle sliding strip is arranged on the rail sliding groove in a sliding mode, and a display screen is arranged on the frame. The moving box bodies of the two sliding assemblies slide in the same direction, so that the frame drives the display screen to horizontally move left and right, and the purpose of flexibly writing on the blackboard is achieved. The box moving bodies of the two sliding assemblies move towards the direction of the display screen at the same time, so that the frame drives the display screen to ascend to the position above the blackboard.

Description

Technical Field

[0001] The present invention relates to the technical field of multimedia electric teaching aids, and more specifically to a multimedia intelligent blackboard. Background Art

[0002] Multimedia smart blackboard is a high-tech device commonly used in modern teaching, training and conferences. It perfectly combines traditional blackboard with modern technology, bringing great convenience and efficiency improvement to educational activities. Multimedia smart blackboard is widely used in teaching activities of various schools. It can not only display course content, but also conduct real-time interaction to improve students' learning interest and efficiency.

[0003] Existing multimedia smart blackboards usually have a multimedia display screen fixedly installed in front of a traditional blackboard to serve the needs of smart teaching.

[0004] However, the existing multimedia smart blackboard has a significant limitation: the fixed multimedia display screen will block part of the writing area of ​​the blackboard, thereby limiting the user's flexible use and practicality of the blackboard space. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a multimedia intelligent blackboard.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A multimedia intelligent blackboard comprises a blackboard, a rail, a sliding assembly and a frame; the blackboard is fixed on a wall; a rail is arranged parallel to the upper side of the blackboard, and the rail is embedded in the wall; a display screen is arranged in the frame, and the frame is movably connected to the rail through the sliding assembly; the sliding assembly comprises a middle slide body, which is slidably connected to the frame and slidably arranged in a rail groove of the rail; the sliding assembly also comprises a main rack, a shift box body, a motor, a bevel gear 1, a bevel gear 2, a shift shaft, a main gear and a long connecting rod; the main rack is arranged on the upper groove wall of the rail groove of the rail; a box slider is arranged on the side of the shift box body, Part of the box slider is slidably arranged in the rail slide groove, and a motor is arranged on the upper part of the moving box body. The rotating shaft of the motor extends into the interior of the moving box body, and a bevel gear 1 is arranged on the rotating shaft of the motor, and a bevel gear 2 is meshed with a side of the bevel gear, and a shift shaft is arranged at the center of the bevel gear 2, and the shift shaft is rotatably arranged on the moving box body, and a main gear is arranged at the end of the shift shaft and located outside the moving box body, and the main gear is meshed with the main rack; one end of the long connecting rod is rotatably connected to the side of the moving box body facing away from the wall, and the other end of the long connecting rod is rotatably connected to the upper part of the frame through a rotating pin, and the other end of the long connecting rod connected to the rotating pin is higher than one end of the long connecting rod connected to the moving box body.

[0008] As a preferred technical solution of the present invention, a frame slide bar and the middle slide body are provided on one side of the frame close to the wall; the middle slide body includes a middle slide groove and a middle slide bar, the middle slide body is slidably connected to the frame slide bar through the middle slide groove, and the middle slide bar is embedded in the rail slide groove to be slidably connected to the rail bar.

[0009] As a preferred technical solution of the present invention, the bottom of the display screen is rotatably arranged at the bottom of the frame frame; a synchronous wheel 1 is provided on the rotating pin, a synchronous belt is meshed on the synchronous wheel 1, a synchronous wheel 2 is meshed at the end of the synchronous belt, the synchronous wheel 2 is rotatably arranged on the frame, and a sub-gear is provided on the rotating shaft of the synchronous wheel 2, a sub-rack is meshed on the side of the sub-gear, a sliding bar is fixedly provided on the side of the sub-rack, a sliding seat is slidably provided on the sliding bar, the sliding seat is fixedly provided on the frame, an inner sliding block is provided at the lower end of the sliding bar, and a short connecting rod is rotatably provided at the lower end of the sliding bar, and the lower end of the short connecting rod is hinged to the side of the display screen.

[0010] As a preferred technical solution of the present invention, a stopper for blocking the movement of the middle slide body is provided at the top of the frame slide bar of the frame.

[0011] As a preferred technical solution of the present invention, the media smart blackboard also includes a locking mechanism for locking the frame slider and the middle slider, the locking mechanism includes a locking hole and a locking assembly, the locking hole is arranged at the lower part of the frame slider, and the locking assembly is arranged at the slider; the locking assembly includes a power block, a locking block, an inner spring and an outer spring; the power block includes a limit plate, a connecting block and a sliding wall connected in sequence, the sliding wall is socketed with the locking block, and the locking block is slidably arranged in the middle hole arranged in the middle part of the middle slider; the inner spring is arranged in the inner cavity of the sliding wall, and the two ends of the inner spring are respectively abutted against the cavity wall of the inner cavity and the locking block; the outer spring is arranged between the limit plate and the middle slider, and the two ends of the outer spring are respectively abutted against the limit plate and the middle slider.

[0012] As a preferred technical solution of the present invention, two wedge blocks for driving the power block to move are provided on the back of the rail, and the side surfaces of the wedge blocks are inclined surfaces.

[0013] As a preferred technical solution of the present invention, two side frames of the frame are provided with inner sliding grooves, and the inner sliding grooves form a sliding fit with the inner sliding blocks.

[0014] As a preferred technical solution of the present invention, two side frames of the frame are provided with two connecting holes located below the inner slide groove, and a cleaning seat is provided next to the two side frames of the frame, and two connecting strips for inserting into the connecting holes are provided on the sides of the cleaning seat, and the connecting strips are connected to the connecting holes in the middle with screws, a cleaning plate is slidably provided on the cleaning seat, and two electric cylinders are fixed on the cleaning seat, and the ends of the telescopic shafts of the electric cylinders are connected to the cleaning plates.

[0015] As a preferred technical solution of the present invention, a cleaning cloth for cleaning the blackboard is provided on the side of the cleaning board facing the blackboard.

[0016] As a preferred technical solution of the present invention, a dust collecting box for collecting dust is provided at the bottom of the blackboard.

[0017] The beneficial effects of the present invention compared with the prior art are:

[0018] 1. The present application uses two motors to operate synchronously in the same direction, so that the box sliders of the two sets of sliding assemblies slide in the same direction on the track groove. Through the connection of a long connecting rod, the frame and the middle slider of the middle slider are translated in the track groove, and the frame and the display screen are translated left and right, thereby achieving the purpose of flexible writing on the blackboard.

[0019] 2. The present application starts the motor of one set of sliding assemblies in the forward direction and the motor of another set of sliding assemblies in the reverse direction at the same time, so that the box sliders of the moving box bodies of the two sliding assemblies move toward the direction of the display screen at the same time, and then transmits power through two long connecting rods to move the frame slider of the frame upward in the middle slide groove. Therefore, the frame rises to the top of the blackboard with the display screen, so that writing can be done on the entire blackboard.

[0020] 3. When the display screen of the present invention rises, the rotating pin drives the synchronous wheel 1 to rotate, and the power is transmitted through the synchronous belt, so that the synchronous wheel 2 and the auxiliary gear rotate synchronously, and then through the meshing action of the auxiliary gear and the auxiliary rack, the slide bar moves downward along the slide seat, and the power is transmitted through the short connecting rod, so that the bottom of the display screen rotates in the frame, so that the display screen can face the user's line of sight, so that the user can read easily.

[0021] 4. When the display screen of the present invention is not used for a long time, the display screen is moved to the two ends of the blackboard and raised to the upper part of the blackboard. The inner spring provides power to insert the locking block into the locking hole, so that the locking block locks the frame to prevent the frame from moving downward, thereby ensuring the safety of the display.

[0022] 5. When the present invention needs to clean the surface of the blackboard, the telescopic shaft of the electric cylinder extends, driving the cleaning plate to move toward the blackboard, the cleaning cloth of the cleaning plate contacts the blackboard, and the frame moves left and right with the cleaning seat and the cleaning plate, so that the cleaning plate cleans the surface of the blackboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the multimedia intelligent blackboard of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the multimedia intelligent blackboard of the present invention from the front view.

[0025] Figure 3 It is a structural schematic diagram of the framework installation of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the cross section of the rail and the moving box body of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the main rack and main gear matching of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the frame slider of the frame of the present invention.

[0029] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0030] Figure 8 It is a schematic diagram of the structure of the sliding body in the present invention.

[0031] Fig. 9 It is a schematic diagram of the structure of the explosion of the power block and the lock block of the present invention.

[0032] Fig.10 It is a structural schematic diagram of the framework of the present invention.

[0033] Fig.11 for Fig. 9 A partial enlarged view of point B in the middle.

[0034] Fig.12 for Fig. 9 A partial enlarged view of point C in the middle.

[0035] Fig.13 It is a structural schematic diagram of the display screen installation of the present invention.

[0036] Fig.14 for Fig.12 A partial enlarged view of point D in the middle.

[0037] Fig.15 It is a structural schematic diagram of the frame and the middle sliding body section of the present invention.

[0038] Fig.16 for Fig.14 A partial enlarged view of point E in the middle.

[0039] Fig.17 It is a structural schematic diagram of the wedge block of the present invention.

[0040] Fig.18 This is a schematic diagram of the structure of the cleaning plate installation of the present invention.

[0041] Figure numbers: 1-blackboard; 2-rail; 201-rail slide; 202-through frame; 3-main rack; 4-moving box body; 401-box slider; 5-motor; 6-bevel gear 1; 7-bevel gear 2; 8-moving shaft; 9-main gear; 10-long connecting rod; 11-rotating pin; 12-frame; 121-frame slide; 122-inner slide; 123-lock hole; 124-connecting hole; 13-middle slide; 131-middle slide; 132-middle slide; 13 3-middle hole; 14-display screen; 15-stopper; 16-synchronous wheel one; 17-synchronous belt; 18-synchronous wheel two; 19-secondary gear; 20-secondary rack; 21-slide bar; 22-slide seat; 23-inner slide block; 24-short connecting rod; 25-power block; 251-slide wall; 26-locking block; 27-inner spring; 28-outer spring; 29-wedge block; 30-cleaning seat; 301-connecting strip; 31-cleaning plate; 32-electric cylinder; 33-dust collecting box. DETAILED DESCRIPTION

[0042] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0043] Example 1: Please refer to Figure 1-18 Structural schematic diagram, the present invention provides the following technical solutions:

[0044] The multimedia intelligent blackboard comprises a blackboard 1, a rail 2, a sliding assembly and a frame 12. The blackboard 1 is fixed on a wall. The rail 2 is arranged parallel to the upper side of the blackboard 1, and the rail 2 is embedded in the wall. A display screen 14 is arranged in the frame 12, and the frame 12 is movably connected to the rail 2 through a sliding assembly.

[0045] The sliding assembly includes a middle sliding body 13, which is slidably connected to the frame 12 and slidably arranged in the rail slide groove 201 of the rail 2. The sliding assembly also includes a main rack 3, a shift box body 4, a motor 5, a bevel gear 1 6, a bevel gear 2 7, a shift shaft 8, a main gear 9 and a long connecting rod 10. The main rack 3 is arranged on the upper groove wall of the rail slide groove 201 of the rail 2. A box slider 401 is arranged on the side of the shift box body 4, and part of the box slider 401 is slidably arranged in the rail slide groove 201. The upper part of the shift box body 4 is provided with a motor 5, and the rotating shaft of the motor 5 extends into the interior of the shift box body 4, and the rotating shaft of the motor 5 is provided with a bevel gear 1 6, and the side of the bevel gear 1 6 is meshed with a bevel gear 2 7, and the center of the bevel gear 2 7 is provided with a shift shaft 8, and the shift shaft 8 is rotatably arranged on the shift box body 4, and the end of the shift shaft 8 and located outside the shift box body 4 is provided with a main gear 9, and the main gear 9 is meshed with the main rack 3. One end of the long connecting rod 10 is rotatably connected to the side of the moving box body 4 facing away from the wall, and the other end of the long connecting rod 10 is rotatably connected to the upper part of the frame 12 through the rotating pin 11, and the other end of the long connecting rod 10 connected to the rotating pin 11 is higher than the end connected to the moving box body 4.

[0046] Specifically, the motor 5 provides power to drive the bevel gear 1 6 to rotate, thereby driving the bevel gear 2 7 to rotate, and then transmits power through the transfer shaft 8 to make the main gear 9 rotate synchronously. Through the meshing action of the main gear 9 and the main rack 3, the box slider 401 of the transfer box body 4 slides in the rail slide groove 201.

[0047] A frame slide bar 121 and a middle slide body 13 are provided on one side of the frame 12 close to the wall. The middle slide body 13 includes a middle slide groove 131 and a middle slide bar 132. The middle slide body 13 is slidably connected to the frame slide bar 121 through the middle slide groove 131. The middle slide bar 132 is embedded in the rail slide groove 201 to be slidably connected to the rail 2.

[0048] Specifically, when the display screen 14 needs to be translated left and right so as to achieve the purpose of flexible writing on the blackboard 1, the motors 5 of the two sets of sliding assemblies are started in the same direction at the same time, so that the box sliders 401 of the moving box bodies 4 of the two sets of sliding assemblies slide in the same direction on the rail groove 201, and through the connection of the long connecting rod 10, the frame 12 translates the middle slide bar 132 of the middle slide body 13 in the rail groove 201, so that the frame 12 translates the display screen 14 left and right.

[0049] When the display screen 14 is not needed temporarily, the entire display screen 14 is raised to the top of the blackboard 1 so that writing can be done on the entire blackboard 1; the motor 5 of one group of sliding assemblies is started in the forward direction, and the motor 5 of the other group of sliding assemblies is started in the reverse direction, so that the box sliders 401 of the moving box bodies 4 of the two sliding assemblies move toward the display screen 14 at the same time, and then the power is transmitted through the two long connecting rods 10 to make the frame slider 121 of the frame 12 move upward in the middle slide groove 131, so that the frame 12 rises to the top of the blackboard 1 with the display screen 14.

[0050] In this embodiment, the bottom of the display screen 14 is rotatably arranged at the bottom of the frame of the frame 12; a synchronous wheel 16 is provided on the rotating pin 11, and a synchronous belt 17 is meshed on the synchronous wheel 16, and a synchronous wheel 2 18 is meshed on the end of the synchronous belt 17, and the synchronous wheel 2 18 is rotatably arranged on the frame 12, and a sub-gear 19 is provided on the rotating shaft of the synchronous wheel 2 18, and a sub-rack 20 is meshed on the side of the sub-gear 19, and a slide bar 21 is fixedly provided on the side of the sub-rack 20, and a slide seat 22 is slidably provided on the slide bar 21, and the slide seat 22 is fixed on the frame 12, and an inner slider 23 is provided at the lower end of the slide bar 21, and a short connecting rod 24 is rotatably provided at the lower end of the slide bar 21, and the lower end of the short connecting rod 24 is hinged to the side of the display screen 14.

[0051] Specifically, considering that the display screen 14 moves upward in translation, the user will squint at the display screen 14 from below the display screen 14, which is inconvenient for the user to read; when the display screen 14 rises, the box sliders 401 of the shifting box bodies 4 of the two sliding assemblies move toward the direction of the display screen 14 at the same time, and the shifting box body 4 drives the long connecting rod 10 and the rotating pin 11 to rotate, and the rotating pin 11 drives the synchronous wheel 16 to rotate, and the power is transmitted through the synchronous belt 17, so that the synchronous wheel 2 18 and the auxiliary gear 19 rotate synchronously, and then through the meshing action of the auxiliary gear 19 and the auxiliary rack 20, the slide bar 21 moves downward along the slide seat 22, and the power is transmitted through the short connecting rod 24, so that the bottom of the display screen 14 rotates in the frame of the frame 12, so that the display screen 14 can face the user's line of sight for the user to read.

[0052] In this embodiment, a stopper 15 is provided at the top of the frame slide bar 121 of the frame 12 for blocking the movement of the middle slide body 13 to prevent the frame slide bar 121 of the frame 12 from falling to the ground along the middle slide groove 131 due to the weight of the frame 12 and the display screen 14 when the motor 5 fails.

[0053] In this embodiment, the multimedia intelligent blackboard also includes a locking mechanism for locking the frame slider 121 and the middle slider 13. The locking mechanism includes a locking hole 123 and a locking assembly. The locking hole 123 is arranged at the lower part of the frame slider 121, and the locking assembly is arranged at the slider 13.

[0054] The locking assembly includes a power block 25, a locking block 26, an inner spring 27 and an outer spring 28. The power block 25 includes a limit plate, a connection block and a sliding wall 251 connected in sequence, the sliding wall 251 is sleeved with the locking block 26, and the locking block 26 is slidably arranged in the middle hole 133 arranged in the middle of the middle slide 13. The inner spring 27 is arranged in the inner cavity of the sliding wall 251, and the two ends of the inner spring 27 are respectively in contact with the cavity wall of the inner cavity and the locking block 26. The outer spring 28 is arranged between the limit plate and the middle slide 13, and the two ends of the outer spring 28 are respectively in contact with the limit plate and the middle slide 13.

[0055] Two wedge blocks 29 for driving the power block 25 to move are arranged on the back of the rail 2, and the side surfaces of the wedge blocks 29 are inclined surfaces.

[0056] Specifically, considering that the display screen 14 is not used for a long time, the display screen 14 is moved to the two ends of the blackboard 1, and the display screen 14 is raised to the upper part of the blackboard 1, in order to prevent the motor 5 from failing and causing the display screen 14 to fall; when the display screen 14 moves to the two ends of the blackboard 1, the wedge block 29 overlaps with the middle slide body 13, and the inclined surface of the wedge block 29 contacts the power block 25, so the wedge block 29 drives the power block 25 to slide in the middle hole 133, and the power block 25 and the outer spring 28 are compressed, so that the lock block 26 is against the frame 12. Frame slider 121; when the display screen 14 and the frame 12 move upward and the lock hole 123 of the frame 12 coincides with the lock block 26, the inner spring 27 provides power and the lock block 26 is inserted into the lock hole 123, so the lock block 26 locks the frame 12 and prevents the frame 12 from moving downward; when the wedge block 29 is separated from the power block 25, the outer spring 28 provides power to make the power block 25 move in the opposite direction in the middle hole 133, and the lock block 26 is pulled out of the lock hole 123 through the power provided by the inner spring 27 to unlock the frame 12.

[0057] In this embodiment, two side frames of the frame 12 are provided with inner slide grooves 122 , and the inner slide grooves 122 and the inner sliders 23 form a sliding fit, so that the slide bar 21 can move up and down more stably.

[0058] The working principle of the multimedia intelligent blackboard provided in this embodiment is as follows:

[0059] When the display screen 14 needs to be translated left and right to write on the blackboard 1: the motors 5 of the two sets of sliding components are started to rotate in the same direction at the same time, the motor 5 drives the bevel gear 1 6 to rotate, the bevel gear 1 6 drives the bevel gear 2 7 to rotate, and then the power is transmitted through the transfer shaft 8 to make the main gear 9 rotate synchronously. When the main gear 9 rotates, it meshes with different parts of the main rack 3 and drives the box slider 401 of the transfer box body 4 to slide in the rail slide groove 201. During the sliding process of the box slider 401, since the two ends of the long connecting rod 10 are respectively connected to the box slider 401 and the frame 12, the box slider 401 can move the frame 12 through the long connecting rod 10. When the frame 12 moves, the middle slide bar 132 of the middle slide body 13 of the frame 12 translates in the rail slide groove 201 to ensure that the display screen 14 translates stably.

[0060] When the display screen 14 is not needed, the entire display screen 14 can be raised above the blackboard 1 to write on the entire blackboard 1. Raising the entire display screen 14 above the blackboard 1 includes: starting the motor 5 of one set of sliding assemblies in the forward direction, and simultaneously starting the motor 5 of another set of sliding assemblies in the reverse direction, and the same principle as above, so that the box sliders 401 of the moving box bodies 4 of the two sliding assemblies move toward the display screen 14 at the same time, and then transmitting power through the two long connecting rods 10, so that the frame slider 121 of the frame 12 moves upward in the middle slide groove 131, so that the frame 12 and the display screen 14 are raised above the blackboard 1.

[0061] Considering the problem that the display screen 14 moves upward in translation, the user will look at the display screen 14 from the side of the bottom of the display screen 14, which is inconvenient for the user to read. The present invention also has the following problems: when the display screen 14 rises, the box sliders 401 of the moving box bodies 4 of the two sliding components move toward the display screen 14 at the same time, the moving box body 4 drives the long connecting rod 10 and the rotating pin 11 to rotate, the rotating pin 11 drives the synchronous wheel 16 to rotate, and the power is transmitted through the synchronous belt 17, so that the synchronous wheel 2 18 and the auxiliary gear 19 rotate synchronously, and then through the meshing action of the auxiliary gear 19 and the auxiliary rack 20, the slide bar 21 moves downward along the slide seat 22, and the power is transmitted through the short connecting rod 24, so that the bottom of the display screen 14 rotates on the frame of the frame 12, so that the display screen 14 can face the user's line of sight, so that the user can read easily.

[0062] Considering that the display screen 14 is not used for a long time, the display screen 14 is moved to the two ends of the blackboard 1, and the display screen 14 is raised to the upper part of the blackboard 1. In order to prevent the motor 5 from failing and causing the display screen 14 to fall, when the display screen 14 is moved to the two ends of the blackboard 1, the wedge block 29 overlaps with the middle slide 13, and the inclined surface of the wedge block 29 contacts the power block 25, so the wedge block 29 drives the power block 25 to slide in the middle hole 133, and the power block 25 and the outer spring 28 are compressed, so that the locking block 26 supports the frame slide 121 of the frame 12. When the display screen 14 and the frame 12 move upward and the locking hole 123 of the frame 12 overlaps with the locking block 26, the inner spring 27 provides power, and the locking block 26 is inserted into the locking hole 123, so the locking block 26 locks the frame 12 to prevent the frame 12 from moving downward.

[0063] Embodiment 2: Based on the specific embodiment 1, this embodiment further performs the following configuration:

[0064] Two connecting holes 124 are provided on the two side frames of the frame 12 and below the inner slide groove 122, and a cleaning seat 30 is provided next to the two side frames of the frame 12. Two connecting strips 301 are provided on the side of the cleaning seat 30 for inserting into the connecting holes 124 respectively. The connecting strips 301 and the connecting holes 124 are connected by screws. A cleaning plate 31 is slidably provided on the cleaning seat 30, and two electric cylinders 32 are fixedly provided on the cleaning seat 30, and the telescopic shaft ends of the electric cylinders 32 are connected to the cleaning plates 31.

[0065] A cleaning cloth for cleaning the blackboard 1 is provided on the side of the cleaning plate 31 facing the blackboard 1 .

[0066] Specifically, when the surface of the blackboard 1 needs to be cleaned, the telescopic shaft of the electric cylinder 32 extends, driving the cleaning plate 31 to move toward the blackboard 1, the cleaning cloth of the cleaning plate 31 contacts the blackboard 1, and the frame 12 moves left and right with the cleaning seat 30 and the cleaning plate 31, so that the cleaning plate 31 cleans the surface of the blackboard 1.

[0067] A dust collecting box 33 for collecting dust is provided at the bottom of the blackboard 1.

[0068] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. Multimedia intelligent blackboard, characterized by: The invention comprises a blackboard (1), a rail (2), a sliding assembly and a frame (12); the blackboard (1) is fixed on a wall; a rail (2) is arranged parallel to the blackboard (1), and the rail (2) is embedded in the wall; a display screen (14) is arranged in the frame (12), and the frame (12) is movably connected to the rail (2) through the sliding assembly; The sliding assembly comprises a middle sliding body (13), wherein the middle sliding body (13) is slidably connected to the frame (12) and slidably disposed in a rail sliding groove (201) of the rail (2); The sliding assembly further comprises a main rack (3), a shift box body (4), a motor (5), a bevel gear 1 (6), a bevel gear 2 (7), a shift shaft (8), a main gear (9) and a long connecting rod (10); the main rack (3) is arranged on the upper groove wall of the rail slide groove (201) of the rail (2); a box slider (401) is arranged on the side of the shift box body (4), and a part of the box slider (401) is slidably arranged in the rail slide groove (201); a motor (5) is arranged on the upper part of the shift box body (4), and the rotating shaft of the motor (5) extends into the interior of the shift box body (4), and a bevel gear 1 (6) is arranged on the rotating shaft of the motor (5), and the bevel gear 1 (6) is meshed with the side of the bevel gear 1 (6) A second bevel gear (7) is provided, a transfer shaft (8) is provided at the center of the second bevel gear (7), and the transfer shaft (8) is rotatably provided on the transfer box body (4), a main gear (9) is provided at the end of the transfer shaft (8) and located outside the transfer box body (4), and the main gear (9) is meshed with the main rack (3); one end of the long connecting rod (10) is rotatably connected to the side of the transfer box body (4) facing away from the wall, and the other end of the long connecting rod (10) is rotatably connected to the upper part of the frame (12) through a rotating pin (11), and the other end of the long connecting rod (10) connected to the rotating pin (11) is higher than the end of the long connecting rod (10) connected to the transfer box body (4).

2. According to claim 1, the multimedia intelligent blackboard is characterized in that: A frame slide bar (121) and the middle slide body (13) are provided on one side of the frame (12) close to the wall; The middle slide body (13) comprises a middle slide groove (131) and a middle slide bar (132); the middle slide body (13) is slidably connected to the frame slide bar (121) via the middle slide groove (131); the middle slide bar (132) is embedded in the rail slide groove (201) to be slidably connected to the rail bar (2).

3. According to claim 2, the multimedia intelligent blackboard is characterized in that: The bottom of the display screen (14) is rotatably arranged at the bottom of the frame of the frame (12); The rotating pin (11) is provided with a synchronous wheel (16), a synchronous belt (17) is meshed on the synchronous wheel (16), a synchronous wheel (18) is meshed at the end of the synchronous belt (17), the synchronous wheel (18) is rotatably arranged on the frame (12), and a secondary gear (19) is provided on the rotating shaft of the synchronous wheel (18), a secondary rack (20) is meshed on the side of the secondary gear (19), a sliding bar (21) is fixedly provided on the side of the secondary rack (20), a sliding seat (22) is slidably provided on the sliding bar (21), the sliding seat (22) is fixedly provided on the frame (12), an inner sliding block (23) is provided at the lower end of the sliding bar (21), and a short connecting rod (24) is rotatably provided at the lower end of the sliding bar (21), and the lower end of the short connecting rod (24) is hinged to the side of the display screen (14).

4. The multimedia intelligent blackboard according to claim 3, characterized in that: A stopper (15) for blocking the movement of the middle slide body (13) is provided at the top of the frame slide bar (121) of the frame (12).

5. The multimedia intelligent blackboard according to claim 3, characterized in that: It also includes a locking mechanism for locking the frame slide bar (121) and the middle slide body (13), the locking mechanism including a locking hole (123) and a locking assembly, the locking hole (123) being arranged at the lower part of the frame slide bar (121), and the locking assembly being arranged at the slide body (13); The locking assembly comprises a power block (25), a locking block (26), an inner spring (27) and an outer spring (28); the power block (25) comprises a limit plate, a connecting block and a sliding wall (251) connected in sequence, the sliding wall (251) is sleeved with the locking block (26), and the locking block (26) is slidably arranged in a middle hole (133) arranged in the middle part of the middle sliding body (13); the inner spring (27) is arranged in the inner cavity of the sliding wall (251), and the two ends of the inner spring (27) are respectively in contact with the cavity wall of the inner cavity and the locking block (26); the outer spring (28) is arranged between the limit plate and the middle sliding body (13), and the two ends of the outer spring (28) are respectively in contact with the limit plate and the middle sliding body (13).

6. The multimedia intelligent blackboard according to claim 5, characterized in that: The back of the rail (2) is provided with two wedge blocks (29) for driving the power block (25) to move, and the side surfaces of the wedge blocks (29) are inclined surfaces.

7. The multimedia intelligent blackboard according to claim 3, characterized in that: The two side frames of the frame (12) are provided with inner sliding grooves (122), and the inner sliding grooves (122) and the inner sliding blocks (23) form a sliding fit.

8. The multimedia intelligent blackboard according to claim 7, characterized in that: Two side frames of the frame (12) are provided with two connection holes (124) below the inner slide groove (122), and a cleaning seat (30) is provided beside the two side frames of the frame (12). Two connection strips (301) are provided on the side of the cleaning seat (30) for respectively inserting into the connection holes (124), and the connection strips (301) are connected to the connection holes (124) by screws. A cleaning plate (31) is slidably provided on the cleaning seat (30), and two electric cylinders (32) are fixedly provided on the cleaning seat (30), and the ends of the telescopic shafts of the electric cylinders (32) are connected to the cleaning plates (31).

9. The multimedia intelligent blackboard according to claim 8, characterized in that: A cleaning cloth for cleaning the blackboard (1) is provided on the side of the cleaning plate (31) facing the blackboard (1).

10. The multimedia intelligent blackboard according to any one of claims 1 to 9, characterized in that: A dust collecting box (33) for collecting dust is provided at the bottom of the blackboard (1).

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