Portable multimedia speech equipment for intelligent teaching system

Abstract

The invention discloses a portable multimedia speech device for an intelligent teaching system, and relates to the technical field of multimedia. The device comprises a device body, a multimedia assembly is arranged in the device body, an electric telescopic cover plate is arranged above the device body, a handle is arranged at the top of the electric telescopic cover plate, a projector is arranged at the center of the front face of the electric telescopic cover plate, and the device further comprises an anti-damage device which is arranged on the surface of the outer wall of the device body. The anti-damage device comprises a concentric-square-shaped bag, an elastic piece and a protection plate, the interior of the concentric-square-shaped bag is fixedly installed on the outer wall surface of the device body, the right side of the elastic piece is fixedly installed on the left side of the outer wall of the device body, the bottom of the protection plate is hinged to the left side of the concentric-square-shaped bag, and the right side of the protection plate is fixedly installed on the left side of the elastic piece. The concentric-square-shaped bag firstly makes contact with the ground, the concentric-square-shaped bag deforms and buffers through the collision force, and therefore the situation that the device body directly collides with the ground and is damaged is avoided.

Description

Technical Field

[0001] The present invention relates to the field of multimedia technology, and particularly to a portable multimedia speech device for a smart teaching system. Background Art

[0002] Multimedia is the integration of multiple media, generally including various media forms such as text, sound, and images. In a computer system, multimedia refers to a human-computer interactive information exchange and dissemination medium that combines two or more media. With the development of technology, multimedia has provided great convenience for people's work.

[0003] A patent with the patent publication number CN113827015A discloses a portable multimedia speech device for a smart education system, including a device box body and a connecting block. Above the device box body, there is a device cover body. The inside of the device cover body is filled with a protective pad, and a lock is installed above the device cover body. A lifting handle is fixed below the device box body, and a storage mechanism is installed inside the device box body. A microphone is arranged in front of the storage mechanism. The beneficial effects of this patent are as follows: For this portable multimedia speech device for a smart education system, the height of the device is adjusted by adjusting the support mechanism, and the projection angle of the device is adjusted by a spherical block. This device can accommodate all things inside the device shell, making the device easy to carry. The connecting wires of the device are sorted out by a wire winding mechanism to prevent the connecting wires from being messy and entangled. The device is protected by a protective pad, and this device can store some tools and instruments.

[0004] However, this device still has deficiencies: This device can freely adjust the height, but when the device body is placed on a table, it may fall, and at this time, it is difficult for this device to provide good protection for the whole device, and it is easy to cause damage to multimedia accessories. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a portable multimedia speech device for a smart teaching system, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A portable multimedia speech device for a smart teaching system, including a device main body, a multimedia component is arranged inside the device main body, an electric telescopic cover plate is arranged above the device main body, and a handle is arranged on the top of the electric telescopic cover plate. A projector is arranged at the center of the front surface of the electric telescopic cover plate. When the electric telescopic cover plate is started, the electric telescopic cover plate automatically rises, and the electric telescopic cover plate drives the projector to freely lift for height adjustment. It also includes an anti-damage device, an anti-adhesion device, an anti-deposition device, and an anti-shake device. The anti-damage device is arranged on the outer wall surface of the device main body, the anti-adhesion device is arranged inside the device main body, the anti-deposition device is arranged inside the anti-adhesion device, and the anti-shake device is arranged at the bottom of the device main body. The anti-damage device includes a loop-shaped bag, a spring piece, and a protection plate. The loop-shaped bag is fixedly installed on the outer wall surface of the device main body. When the device main body accidentally falls to the ground, the loop-shaped bag first contacts the ground, and the loop-shaped bag deforms and buffers through the impact force to avoid the device main body directly colliding with the ground and being damaged. The right side of the spring piece is fixedly installed on the left side of the outer wall of the device main body. The protection plate squeezes the spring piece to deform. The bottom of the protection plate is hinged to the left side of the loop-shaped bag, and the right side of the protection plate is fixedly installed on the left side of the spring piece. The protection plate deforms towards the direction close to the device main body through the extrusion force formed by contacting the ground, further improving the protection of the device main body.

[0007] According to the above technical solution, the anti-damage device further includes an inclined rod, a blocking plate, a convex block, and an arc-shaped piece. The top of the inclined rod is hinged to the concave surface at the bottom of the spring piece. When the spring piece deforms, it drives the inclined rod to move upward. The left side of the blocking plate is hinged to the bottom of the inclined rod, and the right side of the blocking plate contacts the left side of the protection plate. The inclined rod pulls the blocking plate to move synchronously. The blocking plate forms a blocking layer between the protection plate and the device main body to avoid the collision between the protection plate and the device main body. The top of the convex block is fixedly installed at the bottom of the blocking plate. The blocking plate drives the convex block to move synchronously. The convex block limits the deformation of the blocking plate due to the extrusion force. The back surface of the arc-shaped piece is fixedly installed on the front surface of the protection plate. When the protection plate deforms, it squeezes the arc-shaped piece to deform synchronously. The protection plate and the arc-shaped piece cooperate with each other for secondary force unloading.

[0008] According to the above technical solution, the anti-adhesion device includes an electric telescopic column, a drying bag, and a spray gun. The bottom of the electric telescopic column is fixedly installed at the bottom edge of the inner wall of the device main body. The telescopic end of the electric telescopic column pushes the drying bag to reciprocally deform to generate a spraying force. The drying bag is fixedly installed between the top of the telescopic end of the electric telescopic column and the right side of the inner wall of the device main body. The drying bag sprays dry gas through the spray gun to mix and dry the moisture inside the device main body, avoiding the moisture erosion and oxidation of the multimedia component inside the device main body and preventing the multimedia component from short-circuiting and malfunctioning.

[0009] According to the above technical solution, the anti-adhesion device further includes a U-shaped frame, a sliding wheel, a rotating rod, and a powder suction plate. The top of the U-shaped frame penetrates and is fixedly installed inside the telescopic end of the electric telescopic column. The telescopic end of the electric telescopic column drives the U-shaped frame to move up and down. The sliding wheel is rotatably installed on the outer wall surface of the bottom of the U-shaped frame, and the outer wall of the sliding wheel contacts the inner wall bottom of the device body. The U-shaped frame drives the sliding wheel to move left and right. The sliding wheel starts to rotate by generating friction through contact with the inner wall bottom of the device body. The rotating rod is fixedly installed on the front surface of the sliding wheel on the back. The sliding wheel drives the rotating rod to rotate. The powder suction plate is fixedly installed on the left side of the outer wall of the rotating rod on the right side. The rotating rod drives the powder suction plate to rotate. When the powder suction plate rotates, it rotates and adsorbs the chalk dust adhering to the inner wall bottom of the device body.

[0010] According to the above technical solution, the anti-deposition device includes an L-shaped frame, a turning plate, and a knocking column. The bottom of the L-shaped frame is fixedly installed on the inner wall bottom of the drying capsule. When the drying capsule deforms and returns to its original shape, it drives the L-shaped frame to move up and down. The turning plate is fixedly installed between the right side of the L-shaped frame and the inner wall top of the drying capsule. The L-shaped frame drives the turning plate to abut against the top of the drying capsule and deform reciprocally. When the turning plate deforms, it turns the desiccant inside the drying capsule. The knocking column is fixedly installed on the right arc surface of the turning plate on the left side, and the right side of the inner wall of the drying capsule is located on the movement track of the knocking column. When the turning plate deforms and returns to its original shape, it drives the knocking column to reciprocally knock the inner wall of the drying capsule to generate vibration, avoiding the phenomenon that part of the desiccant adheres too tightly and the turning plate cannot turn.

[0011] According to the above technical solution, the anti-deposition device further includes a sliding ring, a lead screw, a rotating plate, and an L-shaped wiping block. The right side of the outer wall of the sliding ring is fixedly installed on the left side of the top of the L-shaped frame. The L-shaped frame drives the sliding ring to reciprocally slide up and down along the surface of the lead screw. The top of the lead screw is rotatably installed on the inner wall top of the drying capsule, and the lead screw is located inside the sliding ring. When the sliding ring slides, it starts to rotate by the rotational force restricted by the spiral groove of the lead screw. The rotating plate is fixedly installed on the outer wall surface of the lead screw on the right side. When the lead screw rotates, it drives the rotating plate to rotate. When the rotating plate rotates, it stirs the desiccant inside the drying capsule. The L-shaped wiping block is fixedly installed on the top of the sliding ring at the bottom, and the right side of the top of the L-shaped wiping block contacts the spiral groove of the lead screw. The sliding ring drives the L-shaped wiping block to move up and down. The L-shaped wiping block rotates and brushes the inner wall of the spiral groove of the lead screw up and down by the force of the self-rotation of the lead screw, preventing the desiccant from adhering to the inner wall of the spiral groove of the lead screw due to moisture.

[0012] According to the above technical solution, the anti-shake device includes a telescopic bottom plate, a square airbag, a pressurizing component, and a telescopic air rod. The top of the telescopic bottom plate is fixedly installed at the bottom of the device body. The top of the square airbag is fixedly installed at the bottom of the telescopic bottom plate. When the device body is placed on the desktop, the square airbag first contacts the desktop. Under the action of gravity, the square airbag deforms. The bottom of the pressurizing component is fixedly installed at the bottom of the inner wall of the telescopic bottom plate, and the pressurizing component is communicated with the square airbag. When the square airbag deforms, it inflates the inside of the pressurizing component. The left side of the telescopic air rod is fixedly installed on the right side of the pressurizing component, and the right side of the telescopic end of the telescopic air rod is fixedly connected to the left side of the telescopic end of the telescopic bottom plate. The pressurizing component conveys the pressurized gas into the telescopic air rod. The telescopic end of the telescopic air rod pushes the telescopic end of the telescopic bottom plate to extend away from the center of the device body, increasing the contact area between the bottom of the device body and the desktop.

[0013] According to the above technical solution, the anti-shake device further includes a trapezoidal block, an L-shaped plate, a vibration plate, and an arc block. The left side of the trapezoidal block is fixedly installed on the right side of the telescopic bottom plate, and the bottom of the trapezoidal block contacts the top of the telescopic end of the telescopic bottom plate. When the telescopic bottom plate extends, the trapezoidal block scrapes the surface of the telescopic end of the telescopic bottom plate to ensure the cleanliness of the surface of the telescopic end of the telescopic bottom plate. The back of the L-shaped plate is fixedly installed on the front of the telescopic bottom plate. When the vibration plate moves, it contacts the L-shaped plate. When the vibration plate passes by the L-shaped plate, the vibration plate swings back and forth to generate vibration when it restores its elasticity by itself. The back of the vibration plate is fixedly installed on the front of the telescopic end of the telescopic bottom plate, and the L-shaped plate is located on the movement track of the vibration plate. The telescopic end of the telescopic bottom plate drives the vibration plate to move synchronously. The back of the arc block is fixedly installed at the front edge of the vibration plate. The vibration plate drives the arc block to move synchronously. The arc block increases the smoothness of passing through the L-shaped plate through its arc surface.

[0014] The present invention provides a portable multimedia speech device for a smart teaching system. It has the following beneficial effects: (1). Through the setting of the anti-damage device, the cooperation of the loop-shaped airbag, the elastic sheet, and the protection plate enables the loop-shaped airbag to first contact the ground. The loop-shaped airbag deforms and buffers through the resistance force to avoid direct collision between the device body and the ground and cause damage. The protection plate deforms towards the direction close to the device body due to the extrusion force formed by contacting the ground. The protection plate extrudes the elastic sheet to deform, thereby further improving the protection of the device body and preventing damage to the precision components inside the device body. Through the cooperation of the inclined rod, the partition plate, the convex block, and the arc-shaped sheet, the partition plate forms a barrier layer between the protection plate and the device body to avoid the collision between the protection plate and the device body. At the same time, the partition plate drives the convex block to move synchronously, and the convex block restricts the deformation of the partition plate due to the extrusion force to avoid excessive deformation of the partition plate. It also enables the protection plate and the arc-shaped sheet to cooperate to unload the force twice, realizing comprehensive protection of the device body and avoiding shortening the service life of the device body due to collision.

[0015] (2) By setting the anti-adhesion device, through the cooperation of the electric telescopic column, the drying bag and the spray gun, the telescopic end of the electric telescopic column pushes the drying bag to eject the drying gas, avoiding moisture erosion and oxidation of the multimedia components inside the device body, and preventing the multimedia components from short-circuiting and malfunctioning; through the cooperation of the return-shaped frame, the sliding wheel, the rotating rod and the powder suction plate, the sliding wheel starts to rotate due to the friction generated by contacting the bottom inner wall of the device body, the sliding wheel drives the rotating rod to rotate, the rotating rod drives the powder suction plate to rotate, and when the powder suction plate rotates, it rotates and adsorbs the chalk dust adhering to the bottom inner wall of the device body, avoiding the adverse effects caused by the chalk dust adhering to the surface of the multimedia components, and at the same time avoiding excessive concentration and accumulation of dust, extending the cleaning interval time of the powder suction plate to a certain extent and reducing the maintenance frequency.

[0016] (3) By setting the anti-deposition device, through the cooperation of the drying bag, the L-shaped frame, the turning plate and the knocking column, the L-shaped frame drives the turning plate to reciprocally deform against the top of the drying bag, the turning plate turns the desiccant inside the drying bag, promoting the replacement of the desiccant up and down, and preventing the desiccant from sedimenting and caking due to long-term static state; at the same time, the turning plate drives the knocking column to knock the inner wall of the drying bag to generate vibration, avoiding the occurrence of the phenomenon that it cannot be turned; through the cooperation of the sliding ring, the lead screw, the rotating plate and the L-shaped wiping block, when the lead screw rotates, it drives the rotating plate to rotate, and when the rotating plate rotates, it stirs the desiccant, promoting the uniform distribution of the desiccant and ensuring the individual granularity of the desiccant; it also makes the L-shaped wiping block rotate and brush up and down against the inner wall of the lead screw spiral groove by the force of the self-rotation of the lead screw, preventing the desiccant from adhering to the inner wall of the lead screw spiral groove due to moisture, preventing the friction between the sliding ring and the lead screw from weakening, and avoiding the occurrence of the phenomenon that the lead screw cannot rotate.

[0017] (4) By setting the anti-shaking device, through the cooperation of the telescopic bottom plate, the square airbag, the pressurization component and the telescopic air rod, when the square airbag deforms, it inflates the inside of the pressurization component, and the pressurization component prompts the telescopic end of the telescopic air rod to push the telescopic end of the telescopic bottom plate to extend and expand, increasing the contact area between the bottom of the device body and the desktop, improving the stability of the device body when placed, and avoiding the screen projection of the projector from shaking caused by the device body, thereby reducing the viewing experience; through the cooperation of the trapezoidal block, the L-shaped plate, the vibrating plate and the arc block, the trapezoidal block scrapes the surface of the telescopic end of the telescopic bottom plate to prevent the phenomenon that the connection part of the telescopic bottom plate cannot freely expand and contract; at the same time, when the vibrating plate reciprocates and swings due to its own elastic recovery, it generates vibration, prompting the dirt adhering to the surface of the telescopic end of the telescopic bottom plate to loosen, thereby further improving the scraping effect of the trapezoidal block; the vibrating plate drives the arc block to move synchronously, and the arc block increases the smoothness of the L-shaped plate passing through through its own arc surface, avoiding the occurrence of jamming. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the whole of the present invention; Figure 2 It is a schematic cross-sectional view of the whole of the present invention; Figure 3 It is a schematic diagram of the anti-damage device of the present invention; Figure 4 It is an enlarged schematic view of the whole of the anti-damage device of the present invention; Figure 5 It is a schematic diagram of the anti-adhesion device of the present invention; Figure 6 It is a schematic diagram of the anti-deposition device of the present invention; Figure 7 It is a schematic cross-sectional view of the anti-shaking device of the present invention; Figure 8 It is a schematic view from the top perspective of the anti-shaking device of the present invention; Figure 9 It is an enlarged schematic view of the structure at position A in the anti-shaking device of the present invention.

[0019] In the figure: 1. Device main body; 11. Multimedia component; 2. Electric telescopic cover plate; 3. Projector; 4. Anti-damage device; 41. U-shaped bladder; 42. Elastic sheet; 43. Protection plate; 44. Diagonal rod; 45. Partition plate; 46. Protrusion; 47. Arc-shaped sheet; 5. Anti-adhesion device; 51. Electric telescopic column; 52. Drying bladder; 53. Spray gun; 54. U-shaped frame; 55. Slide wheel; 56. Rotating rod; 57. Powder suction plate; 6. Anti-deposition device; 61. L-shaped frame; 62. Flipping plate; 63. Knocking column; 64. Sliding ring; 65. Lead screw; 66. Rotating plate; 67. L-shaped wiping block; 7. Anti-shaking device; 71. Telescopic bottom plate; 72. Square airbag; 73. Pressurizing component; 74. Telescopic air rod; 75. Trapezoidal block; 76. L-shaped plate; 77. Vibration plate; 78. Arc-shaped block. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Please refer to Figures 1-5, an embodiment of the present invention is: a portable multimedia speech device for a smart teaching system, including a device main body 1. A multimedia component 11 is arranged inside the device main body 1. An electric telescopic cover plate 2 is arranged above the device main body 1, and a handle is arranged on the top of the electric telescopic cover plate 2. A projector 3 is arranged at the center of the front surface of the electric telescopic cover plate 2. It also includes an anti-damage device 4 and an anti-adhesion device 5. The anti-damage device 4 is arranged on the outer wall surface of the device main body 1, and the anti-adhesion device 5 is arranged inside the device main body 1. The anti-damage device 4 includes a loop-shaped bag 41, a spring piece 42 and a protection plate 43. The loop-shaped bag 41 is fixedly installed on the outer wall surface of the device main body 1 inside. The right side of the spring piece 42 is fixedly installed on the left side of the outer wall of the device main body 1. The bottom of the protection plate 43 is hinged to the left side of the loop-shaped bag 41, and the right side of the protection plate 43 is fixedly installed on the left side of the spring piece 42. When the electric telescopic cover plate 2 is started, the electric telescopic cover plate 2 automatically rises, and the electric telescopic cover plate 2 drives the projector 3 to freely lift for height adjustment. When the device main body 1 accidentally falls to the ground, the loop-shaped bag 41 first contacts the ground. Due to the impact force, the loop-shaped bag 41 deforms and buffers, so as to avoid the device main body 1 directly colliding with the ground and being damaged. The protection plate 43 squeezes the spring piece 42 to deform, and the protection plate 43 deforms towards the direction close to the device main body 1 through the extrusion force formed by contacting the ground, further improving the protection of the device main body 1.

[0022] The anti-damage device 4 further includes an inclined rod 44, a partition plate 45, a convex block 46 and an arc-shaped piece 47. The top of the inclined rod 44 is hinged to the concave surface at the bottom of the spring piece 42. The left side of the partition plate 45 is hinged to the bottom of the inclined rod 44, and the right side of the partition plate 45 contacts the left side of the protection plate 43. The top of the convex block 46 is fixedly installed at the bottom of the partition plate 45. The back of the arc-shaped piece 47 is fixedly installed on the front surface of the protection plate 43. When the spring piece 42 deforms, it drives the inclined rod 44 to move upward. The inclined rod 44 pulls the partition plate 45 to move synchronously. The partition plate 45 forms a barrier layer between the protection plate 43 and the device main body 1, avoiding the collision between the protection plate 43 and the device main body 1. The partition plate 45 drives the convex block 46 to move synchronously. The convex block 46 limits the deformation of the partition plate 45 due to the extrusion force. When the protection plate 43 deforms, it squeezes the arc-shaped piece 47 to deform synchronously. The protection plate 43 and the arc-shaped piece 47 cooperate with each other for secondary force unloading.

[0023] The anti-adhesion device 5 includes an electric telescopic column 51, a drying bag 52 and a spray gun 53. The bottom of the electric telescopic column 51 is fixedly installed at the bottom edge of the inner wall of the device main body 1. The drying bag 52 is fixedly installed between the top of the telescopic end of the electric telescopic column 51 and the right side of the inner wall of the device main body 1. The right side of the spray gun 53 is fixedly installed at the center of the left side of the drying bag 52. The telescopic end of the electric telescopic column 51 pushes the drying bag 52 to reciprocally deform to generate a spraying force. The drying bag 52 sprays out dry gas through the spray gun 53 to mix and dry the moisture inside the device main body 1, avoiding the moisture from eroding and oxidizing the multimedia component 11 inside the device main body 1 and preventing the multimedia component 11 from short-circuiting and malfunctioning.

[0024] The anti-adhesion device 5 further includes a return-shaped frame 54, a sliding wheel 55, a rotating rod 56 and a powder-absorbing plate 57. The top of the return-shaped frame 54 penetrates and is fixedly installed inside the telescopic end of the electric telescopic column 51. The sliding wheel 55 is rotatably installed on the outer wall surface of the bottom of the return-shaped frame 54, and the outer wall of the sliding wheel 55 contacts the inner wall bottom of the device main body 1. The back of the rotating rod 56 is fixedly installed on the front of the sliding wheel 55. The right side of the powder-absorbing plate 57 is fixedly installed on the left side of the outer wall of the rotating rod 56. The telescopic end of the electric telescopic column 51 drives the return-shaped frame 54 to move up and down. The return-shaped frame 54 drives the sliding wheel 55 to move left and right. The sliding wheel 55 starts to rotate by generating friction through contacting the inner wall bottom of the device main body 1. The sliding wheel 55 drives the rotating rod 56 to rotate, and the rotating rod 56 drives the powder-absorbing plate 57 to rotate. When the powder-absorbing plate 57 rotates, it rotates and adsorbs the chalk dust adhering to the inner wall bottom of the device main body 1.

[0025] During use, place the device main body 1 horizontally on the table, start the electric telescopic cover plate 2, and the electric telescopic cover plate 2 automatically rises. The electric telescopic cover plate 2 drives the projector 3 to freely lift for height adjustment, and the multimedia component 11 and the projector 3 start to project teaching content; when the device main body 1 accidentally falls to the ground, the return-shaped bag 41 first contacts the ground, and due to the impact force, the return-shaped bag 41 deforms and buffers to prevent the device main body 1 from directly colliding with the ground and being damaged; when the device main body 1 lands on its side, the protection plate 43 deforms towards the direction close to the device main body 1 due to the extrusion force formed by contacting the ground. The protection plate 43 squeezes the elastic piece 42 to deform, thereby further protecting the device main body 1 and preventing the precision components inside the device main body 1 from being damaged; when the elastic piece 42 deforms, it drives the inclined rod 44 to move upward, and the inclined rod 44 pulls the partition plate 45 to move synchronously. The partition plate 45 forms a barrier layer between the protection plate 43 and the device main body 1 to prevent the protection plate 43 from colliding with the device main body 1; the partition plate 45 drives the convex block 46 to move synchronously, and the convex block 46 limits the deformation of the partition plate 45 due to the extrusion force to prevent the partition plate 45 from deforming excessively due to the extrusion force of the protection plate 43 and losing the barrier effect; when the protection plate 43 deforms, it squeezes the arc-shaped piece 47 to deform synchronously. When the device main body 1 lands on its front side, the arc-shaped piece 47 pushes the protection plate 43 to move away from the center of the device main body 1. The protection plate 43 and the arc-shaped piece 47 cooperate with each other for secondary force unloading to achieve comprehensive protection of the device main body 1 and prevent the device main body 1 from shortening its service life due to collisions.

[0026] When the southern plum rain season comes, start the electric telescopic column 51. The telescopic end of the electric telescopic column 51 pushes the drying bag 52 to reciprocally deform and generate a spraying force. The drying bag 52 sprays the drying gas through the spray gun 53 to mix and dry the moisture inside the device main body 1, avoiding the erosion and oxidation of the multimedia component 11 inside the device main body 1 and preventing the multimedia component 11 from short-circuiting and malfunctioning; the telescopic end of the electric telescopic column 51 drives the return frame 54 to move up and down, the return frame 54 drives the sliding wheel 55 to move left and right, and the sliding wheel 55 starts to rotate by generating friction through contacting the bottom inner wall of the device main body 1. The sliding wheel 55 drives the rotating rod 56 to rotate, the rotating rod 56 drives the powder suction plate 57 to rotate, and when the powder suction plate 57 rotates, it rotates and adsorbs the chalk dust adhering to the bottom inner wall of the device main body 1, avoiding the adverse effects caused by the chalk dust adhering to the surface of the multimedia component 11. Through the rotational absorption of the powder suction plate 57, the chalk dust is evenly distributed on the surface of the powder suction plate 57, avoiding the excessive concentration and accumulation of dust, extending the cleaning interval time of the powder suction plate 57 to a certain extent, and reducing the maintenance frequency.

[0027] Please refer to Figures 1-9 , on the basis of the above embodiment, in another embodiment of the present invention, it further includes a sediment prevention device 6 and an anti-shaking device 7. The sediment prevention device 6 is arranged inside the anti-adhesion device 5, and the anti-shaking device 7 is arranged at the bottom of the device main body 1; The sediment prevention device 6 includes an L-shaped frame 61, a turning plate 62, and a knocking column 63. The bottom of the L-shaped frame 61 is fixedly installed on the bottom inner wall of the drying bag 52. The turning plate 62 is fixedly installed between the right side of the L-shaped frame 61 and the top inner wall of the drying bag 52. The left side of the knocking column 63 is fixedly installed at the right arc surface of the turning plate 62, and the right side inner wall of the drying bag 52 is located on the movement track of the knocking column 63. When the drying bag 52 deforms and restores, it drives the L-shaped frame 61 to move up and down. The L-shaped frame 61 drives the turning plate 62 to abut against the top of the drying bag 52 and reciprocally deform. When the turning plate 62 deforms, it turns the desiccant inside the drying bag 52. When the turning plate 62 deforms and restores, it drives the knocking column 63 to reciprocally knock the inner wall of the drying bag 52 to generate vibration, avoiding the phenomenon that some desiccants adhere too tightly and the turning plate 62 cannot be turned.

[0028] The anti-deposition device 6 further includes a sliding ring 64, a lead screw 65, a rotating plate 66 and an L-shaped wiping block 67. The right side of the outer wall of the sliding ring 64 is fixedly installed on the left side of the top of the L-shaped frame 61. The top of the lead screw 65 is rotatably installed on the inner wall top of the drying capsule 52, and the lead screw 65 is located inside the sliding ring 64. The right side of the rotating plate 66 is fixedly installed on the outer wall surface of the lead screw 65. The bottom of the L-shaped wiping block 67 is fixedly installed on the top of the sliding ring 64, and the right side of the top of the L-shaped wiping block 67 is in contact with the spiral groove of the lead screw 65. The L-shaped frame 61 drives the sliding ring 64 to reciprocate up and down along the surface of the lead screw 65. When the sliding ring 64 slides, a rotational force is generated through the restriction of the spiral groove of the lead screw 65 to start rotating. When the lead screw 65 rotates, it drives the rotating plate 66 to rotate. When the rotating plate 66 rotates, it agitates the desiccant inside the drying capsule 52. The sliding ring 64 drives the L-shaped wiping block 67 to move up and down. The L-shaped wiping block 67 rotates and brushes up and down the inner wall of the spiral groove of the lead screw 65 by the self-rotating force of the lead screw 65, preventing the desiccant from adhering to the inner wall of the spiral groove of the lead screw 65 due to moisture.

[0029] The anti-shaking device 7 includes a telescopic bottom plate 71, a square airbag 72, a pressurizing component 73 and a telescopic air rod 74. The top of the telescopic bottom plate 71 is fixedly installed at the bottom of the device main body 1. The top of the square airbag 72 is fixedly installed at the bottom of the telescopic bottom plate 71. The bottom of the pressurizing component 73 is fixedly installed on the inner wall bottom of the telescopic bottom plate 71, and the pressurizing component 73 is communicated with the square airbag 72. The left side of the telescopic air rod 74 is fixedly installed on the right side of the pressurizing component 73, and the right side of the telescopic end of the telescopic air rod 74 is fixedly connected to the left side of the telescopic end of the telescopic bottom plate 71. When the device main body 1 is placed on the table, the square airbag 72 first contacts the table. Under the action of gravity, the square airbag 72 deforms. When the square airbag 72 deforms, it inflates the inside of the pressurizing component 73. The pressurizing component 73 delivers the pressurized gas to the inside of the telescopic air rod 74. The telescopic end of the telescopic air rod 74 pushes the telescopic end of the telescopic bottom plate 71 to extend away from the center of the device main body 1, increasing the contact area between the bottom of the device main body 1 and the table.

[0030] The anti-shake device 7 further includes a trapezoidal block 75, an L-shaped plate 76, a vibrating plate 77, and an arc-shaped block 78. The left side of the trapezoidal block 75 is fixedly installed on the right side of the telescopic bottom plate 71, and the bottom of the trapezoidal block 75 contacts the top of the telescopic end of the telescopic bottom plate 71. The back of the L-shaped plate 76 is fixedly installed on the front of the telescopic bottom plate 71, and the back of the vibrating plate 77 is fixedly installed on the front of the telescopic end of the telescopic bottom plate 71. And the L-shaped plate 76 is located on the moving track of the vibrating plate 77. The back of the arc-shaped block 78 is fixedly installed at the front edge of the vibrating plate 77. When the telescopic bottom plate 71 extends, the trapezoidal block 75 scrapes the surface of the telescopic end of the telescopic bottom plate 71 to ensure the cleanliness of the surface of the telescopic end of the telescopic bottom plate 71. When the vibrating plate 77 moves, it contacts the L-shaped plate 76. When the vibrating plate 77 passes by the L-shaped plate 76, the vibrating plate 77 swings back and forth when it restores its elasticity by itself to generate vibration. The telescopic end of the telescopic bottom plate 71 drives the vibrating plate 77 to move synchronously. The vibrating plate 77 drives the arc-shaped block 78 to move synchronously. The arc-shaped block 78 increases the smoothness of passing through the L-shaped plate 76 through its arc-shaped surface.

[0031] During use, when the drying capsule 52 restores its deformation, it drives the L-shaped frame 61 to move up and down. The L-shaped frame 61 drives the turning plate 62 to contact the top of the drying capsule 52 and deform reciprocally. When the turning plate 62 deforms, it turns the desiccant inside the drying capsule 52 to promote the up-and-down replacement of the desiccant and prevent the desiccant from depositing and caking due to long-term static placement. When the turning plate 62 restores its deformation, it drives the knocking column 63 to knock the inner wall of the drying capsule 52 reciprocally to generate vibration, avoiding the phenomenon that the turning plate 62 cannot turn due to some desiccant adhering too tightly. The L-shaped frame 61 drives the sliding ring 64 to slide reciprocally up and down along the surface of the lead screw 65. When the sliding ring 64 slides, it generates a rotational force and starts to rotate through the restriction of the spiral groove of the lead screw 65. When the lead screw 65 rotates, it drives the rotating plate 66 to rotate. When the rotating plate 66 rotates, it stirs the desiccant inside the drying capsule 52 to promote the uniform distribution of the desiccant and ensure the individual granularity of the desiccant. The sliding ring 64 drives the L-shaped wiping block 67 to move up and down. The L-shaped wiping block 67 rotates and brushes up and down the inner wall of the spiral groove of the lead screw 65 by the force of the self-rotation of the lead screw 65, preventing the desiccant from adhering to the inner wall of the spiral groove of the lead screw 65 due to moisture, preventing the frictional force between the sliding ring 64 and the lead screw 65 from weakening, and avoiding the phenomenon that the lead screw 65 cannot rotate.

[0032] When the device main body 1 is placed on the desktop, the square airbag 72 first contacts the desktop. Under the action of gravity, the square airbag 72 deforms. When the square airbag 72 deforms, it inflates the inside of the pressurization component 73. The pressurization component 73 delivers the pressurized gas to the inside of the telescopic air rod 74. The telescopic end of the telescopic air rod 74 pushes the telescopic end of the telescopic bottom plate 71 to extend away from the center of the device main body 1. When the telescopic bottom plate 71 extends, it increases the contact area between the bottom of the device main body 1 and the desktop, thereby improving the stability of the device main body 1 when placed, and preventing the device main body 1 from shaking due to external forces, which may cause the projection screen of the projector 3 to shake and reduce the viewing experience. When the telescopic bottom plate 71 extends, the trapezoidal block 75 scrapes the surface of the telescopic end of the telescopic bottom plate 71 to ensure the cleanliness of the surface of the telescopic end of the telescopic bottom plate 71, prevent the connection of the telescopic bottom plate 71 from getting stuck due to external dirt, and avoid the phenomenon that the telescopic bottom plate 71 cannot extend and retract freely. The telescopic end of the telescopic bottom plate 71 drives the vibration plate 77 to move synchronously. When the vibration plate 77 moves, it contacts the L-shaped plate 76. When the vibration plate 77 passes by the L-shaped plate 76, the vibration plate 77 swings back and forth when it restores its elasticity through its own elasticity, generating vibrations, which prompts the dirt adhering to the surface of the telescopic end of the telescopic bottom plate 71 to loosen, thereby further improving the scraping effect of the trapezoidal block 75. The vibration plate 77 drives the arc block 78 to move synchronously. The arc block 78 increases the smoothness of passing through the L-shaped plate 76 through its own arc surface, avoiding the occurrence of jamming phenomena.

[0033] As mentioned above, the above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A portable multimedia presentation device for an intelligent teaching system, comprising a device main body (1). A multimedia component (11) is arranged inside the device main body (1). An electric telescopic cover plate (2) is arranged above the device main body (1), and a handle is arranged at the top of the electric telescopic cover plate (2). A projector (3) is arranged at the center of the front surface of the electric telescopic cover plate (2), and it is characterized in that: It also includes an anti-damage device (4), an anti-adhesion device (5), an anti-deposition device (6) and an anti-shake device (7). The anti-damage device (4) is arranged on the outer wall surface of the device main body (1). The anti-adhesion device (5) is arranged inside the device main body (1). The anti-deposition device (6) is arranged inside the anti-adhesion device (5). The anti-shake device (7) is arranged at the bottom of the device main body (1). The anti-damage device (4) includes a U-shaped capsule (41), a spring piece (42) and a protection plate (43). The U-shaped capsule (41) is fixedly installed on the outer wall surface of the device main body (1) inside. The right side of the spring piece (42) is fixedly installed on the left side of the outer wall of the device main body (1). The bottom of the protection plate (43) is hinged to the left side of the U-shaped capsule (41), and the right side of the protection plate (43) is fixedly installed on the left side of the spring piece (42).

2. The portable multimedia speech device for an intelligent teaching system according to claim 1, characterized in that: The anti-damage device (4) also includes an inclined rod (44), a partition plate (45), a bump (46) and an arc-shaped piece (47). The top of the inclined rod (44) is hinged to the concave surface at the bottom of the spring piece (42). The left side of the partition plate (45) is hinged to the bottom of the inclined rod (44), and the right side of the partition plate (45) contacts the left side of the protection plate (43). The top of the bump (46) is fixedly installed at the bottom of the partition plate (45). The back of the arc-shaped piece (47) is fixedly installed on the front of the protection plate (43).

3. A portable multimedia presentation device for an intelligent teaching system according to claim 1, characterized in that: The anti-adhesion device (5) includes an electric telescopic column (51), a drying capsule (52) and a spray gun (53). The bottom of the electric telescopic column (51) is fixedly installed at the bottom edge of the inner wall of the device main body (1). The drying capsule (52) is fixedly installed between the top of the telescopic end of the electric telescopic column (51) and the right side of the inner wall of the device main body (1). The right side of the spray gun (53) is fixedly installed at the center of the left side of the drying capsule (52).

4. The portable multimedia presentation device for an intelligent teaching system according to claim 3, characterized in that: The anti-adhesion device (5) also includes a U-shaped frame (54), a sliding wheel (55), a rotating rod (56) and a powder suction plate (57). The top of the U-shaped frame (54) penetrates and is fixedly installed inside the telescopic end of the electric telescopic column (51). The sliding wheel (55) is rotatably installed on the outer wall surface of the bottom of the U-shaped frame (54), and the outer wall of the sliding wheel (55) contacts the bottom of the inner wall of the device main body (1). The back of the rotating rod (56) is fixedly installed on the front of the sliding wheel (55). The right side of the powder suction plate (57) is fixedly installed on the left side of the outer wall of the rotating rod (56).

5. The portable multimedia presentation device for an intelligent teaching system according to claim 3, characterized in that: The anti-deposition device (6) includes an L-shaped frame (61), a turning plate (62) and a knocking column (63). The bottom of the L-shaped frame (61) is fixedly installed at the bottom of the inner wall of the drying capsule (52). The turning plate (62) is fixedly installed between the right side of the L-shaped frame (61) and the top of the inner wall of the drying capsule (52). The left side of the knocking column (63) is fixedly installed at the arc surface on the right side of the turning plate (62), and the right side of the inner wall of the drying capsule (52) is located on the movement track of the knocking column (63).

6. The portable multimedia speech device for an intelligent teaching system according to claim 5, characterized in that: The anti-deposition device (6) further includes a sliding ring (64), a lead screw (65), a rotating plate (66), and an L-shaped wiping block (67). The right side of the outer wall of the sliding ring (64) is fixedly installed on the left side of the top of the L-shaped frame (61). The top of the lead screw (65) is rotatably installed on the inner wall top of the drying capsule (52), and the lead screw (65) is located inside the sliding ring (64). The right side of the rotating plate (66) is fixedly installed on the outer wall surface of the lead screw (65). The bottom of the L-shaped wiping block (67) is fixedly installed on the top of the sliding ring (64), and the right side of the top of the L-shaped wiping block (67) is in contact with the spiral groove of the lead screw (65).

7. A portable multimedia presentation device for an intelligent teaching system according to claim 1, characterized in that: The anti-shaking device (7) includes a telescopic bottom plate (71), a square airbag (72), a pressurizing component (73), and a telescopic air rod (74). The top of the telescopic bottom plate (71) is fixedly installed on the bottom of the device main body (1). The top of the square airbag (72) is fixedly installed on the bottom of the telescopic bottom plate (71). The bottom of the pressurizing component (73) is fixedly installed on the inner wall bottom of the telescopic bottom plate (71), and the pressurizing component (73) is communicated with the square airbag (72). The left side of the telescopic air rod (74) is fixedly installed on the right side of the pressurizing component (73), and the right side of the telescopic end of the telescopic air rod (74) is fixedly connected to the left side of the telescopic end of the telescopic bottom plate (71).

8. A portable multimedia presentation device for an intelligent teaching system according to claim 7, characterized in that: The anti-shaking device (7) further includes a trapezoidal block (75), an L-shaped plate (76), a vibrating plate (77), and an arc-shaped block (78). The left side of the trapezoidal block (75) is fixedly installed on the right side of the telescopic bottom plate (71), and the bottom of the trapezoidal block (75) is in contact with the top of the telescopic end of the telescopic bottom plate (71). The back of the L-shaped plate (76) is fixedly installed on the front of the telescopic bottom plate (71). The back of the vibrating plate (77) is fixedly installed on the front of the telescopic end of the telescopic bottom plate (71), and the L-shaped plate (76) is located on the movement track of the vibrating plate (77). The back of the arc-shaped block (78) is fixedly installed at the front edge of the vibrating plate (77).

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