CN219017101U - Expandable demonstration board - Google Patents

Abstract

The utility model relates to an expandable demonstration board which comprises a multimedia display screen, wherein an automatic ash removing mechanism is arranged on the outer side of the multimedia display screen, an expansion mechanism is arranged above the multimedia display screen, a height adjusting mechanism is arranged below the multimedia display screen, the automatic ash removing mechanism comprises a first ash collecting groove, and the bottom of the outer side of the multimedia display screen is fixedly connected with the first ash collecting groove. The device has the beneficial effects that the plurality of brushes are arranged, so that the ash collecting grooves can be cleaned along with the expansion and contraction of the demonstration board, the phenomenon that chalk dust is accumulated in the first ash collecting groove for the chalk demonstration blackboard to slide in the law teaching process to influence the expansion of the demonstration board is avoided, the influence of the chalk dust splashing on the physical health of teachers and students is reduced, the device can realize the expansion of the demonstration board in two directions simultaneously, the demonstration board is cleaned while the expansion is carried out, and the use experience and the demonstration effect of the forensic teaching demonstration board are greatly improved compared with the traditional device.

Description

Expandable demonstration board

Technical Field

The utility model relates to the technical field of demonstration boards, in particular to an extensible demonstration board.

Background

A presentation board is a tool used for writing and presentation in the educational industry, and is typically placed in a classroom or conference room. The chalk or the fountain pen is used for writing content, and plays roles in explanation and demonstration. With the development of information technology, more and more teaching boards have the function of multimedia display. In law teaching activities, since a large number of examples are required to explain legal regulations and various regulations, lecturers often choose to use multimedia displays for demonstration teaching. In the teaching process, blackboard books can help students to memorize and understand. However, the conventional multimedia display and the teaching demonstration board are separately provided, or a multimedia display screen which is not matched with the original conventional blackboard is additionally installed on the basis of the conventional blackboard, so that the demonstration board has a lot of inconvenience in practical use. By searching, chinese patent discloses an expandable demonstration board (grant bulletin number CN 215730294U) for law teaching, which although "comprises a mounting frame and a back plate, the front face of the mounting frame is embedded with a conference plate. The beneficial effects are that: according to the utility model, the back plate, the front and back tooth screw rods, the motor and the conference flat plate are adopted, in the daily demonstration teaching process, a worker can use the conference flat plate for demonstration, when the blackboard writing is required, the motor can be started to rotate, the front and back tooth screw rods are driven to rotate by the rotation of the motor, so that the connecting block is driven to move outwards, the back plate is driven to move outwards along the guide groove to open, the blackboard writing can be carried out, the demonstration content of the conference flat plate can be conveniently expanded and mainly read, meanwhile, the study staff can observe and memorize the blackboard, the back plate of the device can be expanded and opened, the back plate can be retracted to the rear of the installation frame, the direct use of the conference flat plate is not influenced, meanwhile, the space occupation is saved, and the use is more convenient and simple by adopting an electric opening mode.

Disclosure of Invention

In view of the foregoing problems of the prior art, a primary object of the present utility model is to provide an expandable demonstration board, which can realize synchronous cleaning of chalk dust of the demonstration board when expanding the extension board.

The technical scheme of the utility model is as follows: the utility model provides an expandable demonstration board, includes the multimedia display screen, the outside of multimedia display screen is provided with automatic ash removal mechanism, the top of multimedia display screen is provided with expanding mechanism, the below of multimedia display screen is provided with high adjustment mechanism, automatic ash removal mechanism includes first album ash groove, the first album of ash groove of bottom fixedly connected with in the multimedia display screen outside, the bottom fixedly connected with fixed block of first album ash groove inner wall, the top fixedly connected with stock of fixed block, the equal fixedly connected with first brush in both ends of stock.

As a preferred implementation mode, the automatic ash removal mechanism further comprises two chalk demonstration blackboards, wherein the two chalk demonstration blackboards are symmetrically arranged above the first ash collection groove, the two chalk demonstration blackboards are respectively and rotationally connected with two rollers, the bottoms of the rollers are contacted with the first ash collection groove, the bottoms of the outer sides of the chalk demonstration blackboards are respectively and fixedly connected with the second ash collection groove, the outer sides of the second ash collection grooves are respectively and fixedly connected with the inner wall sliding connection of the first ash collection groove, the bottoms of the second ash collection grooves are respectively and fixedly connected with a second brush, and the second brushes are contacted with the first ash collection groove.

As a preferred implementation mode, the expansion mechanism comprises a hollow box, the top fixedly connected with hollow box of multimedia display screen, rotate between the inner wall of hollow box and be connected with two-way expansion lead screw, the outside fixed mounting of hollow box has the motor, the output shaft of motor extends to the inside of hollow box and with two-way expansion lead screw fixed connection, two are extended the outside symmetry threaded connection of lead screw has two expansion sliders, two the outside of expansion slider all with the inner wall sliding connection of hollow box, two the bottom of expansion slider all with the top fixed connection of chalk demonstration blackboard.

As a preferred implementation mode, the height adjusting mechanism comprises a hollow supporting base, a bidirectional adjusting screw rod is rotationally connected between the inner walls of the hollow supporting base, one end of the bidirectional adjusting screw rod extends to the outer side of the hollow supporting base and is fixedly connected with a rotating handle, two adjusting slide blocks are symmetrically connected to the outer side of the bidirectional adjusting screw rod in a threaded mode, the two adjusting slide blocks are arranged to be long-shaped, the outer sides of the two adjusting slide blocks are all in sliding connection with the inner walls of the hollow supporting base, two strip-shaped grooves are formed in the top of the hollow supporting base, the bottoms of the two strip-shaped grooves are all extended to the inner side of the hollow supporting base, two supporting rods are symmetrically and rotationally connected to the top of the two adjusting slide blocks, and the tops of the four supporting rods penetrate through the top of the strip-shaped grooves and are rotationally connected with supporting blocks.

As a preferable implementation mode, both ends of the bottom of the multimedia display screen are connected with the dust collecting box through screws.

As a preferred implementation mode, the outside of the dust collection box is provided with a through groove matched with the roller, and the bottom of the side, close to the chalk demonstration blackboard, is provided with grooves matched with the fixed blocks.

As a preferred implementation mode, the outside of supporting shoe is fixed mounting has control panel, motor and multi-media display screen all are connected with control panel electricity.

Compared with the prior art, the utility model has the advantages and positive effects that,

according to the utility model, the two dust collecting grooves are arranged, so that chalk dust in the expansion state and the contraction state can fall into the dust collecting grooves, and the plurality of brushes are arranged, so that the dust collecting grooves can be cleaned along with the expansion state and the contraction state of the demonstration board, the chalk in the dust collecting grooves can be swept into the dust collecting box, the expansion of the demonstration board due to the fact that the chalk dust is accumulated in the first dust collecting groove for the chalk to demonstrate the sliding of the blackboard in the law teaching process is avoided, the influence of the chalk dust splashing on the physical health of teachers and students is reduced, in addition, the height adjusting mechanism is arranged, the demonstration board can be adjusted in height and can be folded, the demonstration board can adapt to various occasions, the demonstration board can be expanded in two directions along with the height of a professor and the proper angle observed by the learner, the demonstration board is cleaned while the demonstration board is expanded, and the use experience and the demonstration effect of the law teaching board are greatly improved compared with the traditional device.

Drawings

FIG. 1 is an exterior perspective view of an expandable demonstration board provided by the present utility model;

FIG. 2 is a front cross-sectional view of an unexpanded state of the expandable demonstration board provided by the utility model;

FIG. 3 is a front cross-sectional view of an expanded state of an expandable demonstration board provided by the present utility model;

FIG. 4 is a schematic diagram of an automatic ash removal mechanism of an expandable demonstration board according to the present utility model

Fig. 5 is an enlarged view of a portion a of an expandable demonstration board provided by the present utility model.

Legend description: 1. a multimedia display screen; 2. chalk demonstration blackboard; 3. a first dust collection groove; 4. a fixed block; 5. a long rod; 6. a first brush; 7. an ash collecting box; 8. a second dust collection groove; 9. a roller; 10. a second brush; 11. a hollow box; 12. a motor; 13. a two-way expansion screw rod; 14. an expansion slider; 15. a support block; 16. a brace rod; 17. a hollow support base; 18. a two-way adjusting screw rod; 19. a bar-shaped groove; 20. an adjusting slide block; 21. a rotating handle; 22. and a control panel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model will be further described with reference to the drawings and the specific embodiments

Example 1

As shown in fig. 1, 2, 3, 4 and 5, the present utility model provides a technical solution: including multimedia display screen 1, the outside of multimedia display screen 1 is provided with automatic ash removal mechanism, and the top of multimedia display screen 1 is provided with expanding mechanism, and the below of multimedia display screen 1 is provided with high adjustment mechanism, and automatic ash removal mechanism includes first album ash groove 3, the bottom fixedly connected with first album ash groove 3 in the outside of multimedia display screen 1, the bottom fixedly connected with fixed block 4 of first album ash groove 3 inner wall, the top fixedly connected with stock 5 of fixed block 4, the equal fixedly connected with first brush 6 in both ends of stock 5.

In this embodiment, through setting up automatic ash removal mechanism, make the chalk dust when extension state and shrink state all can drop at the album ash tray, the rethread sets up a plurality of brushes, make the demonstration board when expanding and all can clean album ash tray along with it when contracting, the chalk in the album ash tray can be swept to album ash box 7 in, avoided law teaching in-process chalk dust to pile up the extension that influences the demonstration board at the gliding first album ash tray 3 of confession chalk demonstration blackboard 2, reduced the chalk dust and splashed the healthy influence to teachers and students, in addition, through setting up high adjustment mechanism, make the demonstration board can carry out altitude mixture control, and can fold it, make the demonstration board can adapt to multiple occasion, can carry out altitude mixture control along with the height of professor and the suitable angle that the learner observed, very big improvement the use experience and the demonstration effect of law teaching board than traditional device.

Example 2

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the automatic ash removal mechanism further comprises two chalk demonstration blackboards 2, the two chalk demonstration blackboards 2 are symmetrically arranged above the first ash collection groove 3, the bottoms of the two chalk demonstration blackboards 2 are rotationally connected with two rollers 9, the bottoms of the rollers 9 are contacted with the first ash collection groove 3, the bottoms of the outer sides of the two chalk demonstration blackboards 2 are fixedly connected with second ash collection grooves 8, the outer sides of the two second ash collection grooves 8 are in sliding connection with the inner wall of the first ash collection groove 3, the bottoms of the two second ash collection grooves 8 are fixedly connected with second hairbrushes 10, and the second hairbrushes 10 are contacted with the first ash collection groove 3.

Wherein, the expansion mechanism includes hollow case 11, the top fixedly connected with hollow case 11 of multimedia display screen 1, rotate between the inner wall of hollow case 11 and be connected with two-way expansion lead screw 13, the outside fixed mounting of hollow case 11 has motor 12, motor 12's output shaft extends to the inside of hollow case 11 and with two-way expansion lead screw 13 fixed connection, the outside symmetry threaded connection of two expansion lead screw 13 has two expansion sliders 14, the outside of two expansion sliders 14 all with the inner wall sliding connection of hollow case 11, the bottom of two expansion sliders 14 all with the top fixed connection of chalk demonstration blackboard 2, work through the motor 12 on the control demonstration board, drive two-way expansion lead screw 13 and rotate, two expansion sliders 14 slide, drive chalk demonstration blackboard 2 to both sides slip.

The height adjusting mechanism comprises a hollow supporting base 17, a bidirectional adjusting screw rod 18 is rotationally connected between the inner walls of the hollow supporting base 17, one end of the bidirectional adjusting screw rod 18 extends to the outer side of the hollow supporting base 17 and is fixedly connected with a rotating handle 21, two adjusting slide blocks 20 are symmetrically and threadedly connected to the outer side of the bidirectional adjusting screw rod 18, the adjusting slide blocks 20 are arranged to be long-shaped, the outer sides of the two adjusting slide blocks 20 are slidably connected with the inner walls of the hollow supporting base 17, two strip-shaped grooves 19 are formed in the top of the hollow supporting base 17, the bottoms of the two strip-shaped grooves 19 extend to the inside of the hollow supporting base 17, the tops of the two adjusting slide blocks 20 are symmetrically and rotationally connected with two supporting rods 16, the tops of the four supporting rods 16 extend to the upper side of the hollow supporting base 17 and are rotationally connected with supporting blocks 15, the tops of the supporting blocks 15 are fixedly connected with the bottom of the multimedia display screen 1, the distance between the tops of the supporting blocks 16 and the adjusting slide blocks 20 can be obtained by the Pythagorean theorem through the fact that the length of the supporting rods 16 is unchanged, accordingly, the distance between the tops of the supporting rods 16 and the adjusting slide blocks 20 can be changed, accordingly, the height of a demonstration board can be adjusted, the two supporting blocks can be realized, and the two adjusting slide blocks are furthest distance can be realized, and the distance can be adjusted, and the board, and the distance board can be displayed.

Wherein, both ends of multimedia display screen 1 bottom all have album ash box 7 through the screw connection, can collect the chalk dust in two album ash grooves through album ash box 7, and screw connection is convenient to change.

Wherein, the outside of collection ash box 7 is offered and is mutually supported the logical groove of gyro wheel 9, and the recess that mutually supports with fixed block 4 has all been offered to the bottom that chalk demonstration blackboard 2 is close to one side mutually, through offer logical groove on collection ash box 7, makes things convenient for gyro wheel 9 to pass through, through offer the recess in the outside of chalk demonstration blackboard 2, for the installation of fixed block 4 provides the space.

The outer side of the supporting block 15 is fixedly provided with a control panel 22, the motor 12 and the multimedia display screen 1 are electrically connected with the control panel 22, and the motor 12 and the multimedia display screen 1 can be controlled to work through the control panel 22.

Working principle:

as shown in fig. 1, 2, 3 and 4, during law teaching, a relatively complicated legal provision is usually required to be displayed, and the law teaching demonstration device is suitable for multimedia demonstration, at this time, by controlling a motor 12 on a demonstration board to work, a bidirectional expansion screw rod 13 is driven to rotate, two expansion sliding blocks 14 slide, a chalk demonstration blackboard 2 is driven to slide towards two sides, a multimedia display screen 1 is exposed, and meanwhile, along with the sliding of the chalk demonstration blackboard 2, a second brush 10 sweeps chalk dust in a first dust collection groove 3 into a dust collection box 7, collects the chalk dust, when the demonstration board is required to be folded, the motor 12 is controlled to reversely rotate, the two expansion sliding blocks 14 are driven to slide towards directions close to each other, and simultaneously, the two first brushes 6 sweep the chalk dust in a second dust collection groove 8, when two chalks demonstrate blackboard 2 contact just, first brush 6 sweeps into album ash box 7 with the chalk dust in the second album ash groove 8 just this moment, in addition, can control two regulation slider 20 slip through rotating the commentaries on classics handle 21, and then can adjust the height of multi-media display screen 1, with adaptation learner's observation angle and professor's writing angle, avoided the law in-process chalk dust to pile up and influence the extension of demonstration board at the gliding first album ash groove 3 of confession chalk demonstration blackboard 2, reduced the chalk dust and splashed the healthy influence to teachers and students, can realize simultaneously that the demonstration board expands in two directions, and clear up the demonstration board in the extension, very big improvement the use experience and the demonstration effect of law teaching demonstration board than traditional device.

Finally, it should be noted that: the embodiments described above are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (7)

1. An expandable presentation board comprising a multimedia display screen (1), characterized in that: the automatic ash removal mechanism is characterized in that an automatic ash removal mechanism is arranged on the outer side of the multimedia display screen (1), an expansion mechanism is arranged above the multimedia display screen (1), a height adjusting mechanism is arranged below the multimedia display screen (1), the automatic ash removal mechanism comprises a first ash collection groove (3), a first ash collection groove (3) is fixedly connected to the bottom of the outer side of the multimedia display screen (1), a fixing block (4) is fixedly connected to the bottom of the inner wall of the first ash collection groove (3), a long rod (5) is fixedly connected to the top of the fixing block (4), and first hairbrushes (6) are fixedly connected to the two ends of the long rod (5).

2. An expandable demonstration board according to claim 1, wherein: the automatic ash removal mechanism further comprises two chalk demonstration blackboards (2), the two chalk demonstration blackboards (2) are symmetrically arranged above the first ash collection groove (3), the two chalk demonstration blackboards (2) are rotationally connected with two rollers (9) at the bottoms, the bottoms of the rollers (9) are in contact with the first ash collection groove (3), the two chalk demonstration blackboards (2) are fixedly connected with second ash collection grooves (8) at the bottoms, the two chalk demonstration blackboards (2) are fixedly connected with second ash collection grooves (8), the outer sides of the second ash collection grooves (8) are in sliding connection with the inner wall of the first ash collection groove (3), the bottoms of the second ash collection grooves (8) are fixedly connected with second brushes (10), and the second brushes (10) are in contact with the first ash collection groove (3).

3. An expandable demonstration board according to claim 2, wherein: the expansion mechanism comprises a hollow box (11), the top of the multimedia display screen (1) is fixedly connected with the hollow box (11), a bidirectional expansion screw rod (13) is rotationally connected between the inner walls of the hollow box (11), a motor (12) is fixedly arranged on the outer side of the hollow box (11), an output shaft of the motor (12) extends to the inside of the hollow box (11) and is fixedly connected with the bidirectional expansion screw rod (13), two expansion sliding blocks (14) are symmetrically connected on the outer side of the bidirectional expansion screw rod (13) in a threaded manner, the outer sides of the expansion sliding blocks (14) are in sliding connection with the inner walls of the hollow box (11), and the bottoms of the expansion sliding blocks (14) are fixedly connected with the top of the chalk demonstration blackboard (2).

4. An expandable demonstration board according to claim 3 wherein: the height adjusting mechanism comprises a hollow supporting base (17), a bidirectional adjusting screw rod (18) is rotationally connected between the inner walls of the hollow supporting base (17), one end of the bidirectional adjusting screw rod (18) extends to the outer side of the hollow supporting base (17) and is fixedly connected with a rotating handle (21), two adjusting slide blocks (20) are symmetrically connected to the outer side of the bidirectional adjusting screw rod (18) in a threaded mode, the two adjusting slide blocks (20) are arranged to be long strips, the outer sides of the two adjusting slide blocks (20) are all in sliding connection with the inner walls of the hollow supporting base (17), two strip-shaped grooves (19) are formed in the top of the hollow supporting base (17), the bottoms of the two strip-shaped grooves (19) are all extended to the inner side of the hollow supporting base (17), the tops of the two adjusting slide blocks (20) are all symmetrically rotationally connected with two supporting rods (16), the tops of the four supporting rods (16) all extend to the upper side of the hollow supporting base (17) in a penetrating mode and are rotationally connected with supporting blocks (15), and the tops of the supporting blocks (15) are fixedly connected with the bottom of a multimedia display screen (1).

5. An expandable demonstration board according to claim 2, wherein: both ends of the bottom of the multimedia display screen (1) are connected with an ash collecting box (7) through screws.

6. An expandable demonstration board according to claim 5 wherein: the outside of collection ash box (7) is offered and is mutually supported the logical groove of gyro wheel (9), the bottom that chalk demonstration blackboard (2) are close to one side mutually all has been offered the recess that mutually supports with fixed block (4).

7. An expandable demonstration board according to claim 4 wherein: the outside of supporting shoe (15) fixed mounting has control panel (22), motor (12) and multi-media display screen (1) all are connected with control panel (22) electricity.

Images