CN210271337U - Demonstration teaching aid and teaching aid assembly - Google Patents

Abstract

The utility model discloses a demonstration teaching aid and teaching aid subassembly relates to teaching aid technical field, including first demonstration board, one side of first demonstration board is equipped with first scale mark and many datum lines that are parallel to each other, and first scale mark is perpendicular with the datum line. Through using this demonstration teaching aid, can simplify the step of drawing, save the drawing time, improve the utilization ratio of teaching time.

Description

Demonstration teaching aid and teaching aid assembly

Technical Field

The utility model relates to a teaching aid technical field particularly, relates to a demonstration teaching aid and teaching aid subassembly.

Background

In the classroom teaching, the interest of the students can be lacked by the simple character teaching, so that the students are not concentrated and are easy to distract in the process of class, the learning effect of the classroom is influenced, the learning ability of the students is reduced, and the learning score is reduced.

By adopting the chart teaching mode, students can generate interest in comparison of data quantity and interest in a classroom, and the learning ability and the learning score of the students can be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a demonstration teaching aid can simplify the step of drawing, saves the drawing time, improves the utilization ratio of teaching time.

Another object of the utility model is to provide a teaching aid subassembly can make the chart fast, can mark the chart, saves the teaching time in classroom.

The embodiment of the utility model is realized like this:

the utility model discloses an aspect provides a demonstration teaching aid, including first demonstration board, one side of first demonstration board is equipped with first scale mark and many datum lines that are parallel to each other, and first scale mark is perpendicular with the datum line.

Optionally, the demonstration teaching aid is still including the second demonstration board, and the second demonstration board is connected with first demonstration board, and one side of second demonstration board is equipped with many model post lines that are parallel to each other.

Optionally, an accommodating groove with an opening is formed in the end portion of the first demonstration board, the second demonstration board is movably arranged in the accommodating groove through the opening, and the side surfaces of the first demonstration board and the second demonstration board are parallel.

Optionally, a first limiting part is arranged on the second demonstration board, a second limiting part is arranged in the accommodating groove, and the first limiting part and the second limiting part are matched to fix the position of the second demonstration board in the accommodating groove.

Optionally, one side of the second demonstration board is further provided with second scale marks, and the second scale marks are perpendicular to the model column lines.

Optionally, the demonstration teaching aid is still including the clipboard, and the one end and the first demonstration board of clipboard are connected.

Optionally, the demonstration teaching aid is still including the receiver, and the one end of first demonstration board is kept away from to the clipboard is located to the receiver.

Optionally, the demonstration teaching aid further comprises a dust collector and a suction pipe communicated with the dust collector, a dust collecting plate is arranged at one end of the writing board, and the suction pipe is arranged on the dust collecting plate.

Optionally, the demonstration teaching aid further comprises an adsorption stone, and the adsorption stone is adsorbed on the first demonstration board.

The utility model discloses an on the other hand provides a teaching aid subassembly, including the writing pen, clean the body and foretell demonstration teaching aid, the writing pen is used for writing on the demonstration teaching aid, cleans the body and is used for cleaning the vestige of writing on the demonstration teaching aid.

Compared with the prior art, the beneficial effects of this embodiment include:

the demonstration teaching aid that this embodiment provided, one side through at first demonstration board is equipped with first scale mark and many reference lines that are parallel to each other, first scale mark perpendicular to reference line, the reference line sets up and is favorable to using personnel to use first demonstration board conveniently on the working face of first demonstration board, when needing to draw, carry out the drawing of figure according to the reference line, save drawing time, first scale mark is used for measuring the size of the figure of drawing, can ensure the accuracy of drawing the figure. The teaching aid subassembly that this embodiment provided, the step that the teacher drawn can be simplified in the use of this demonstration teaching aid for drawing speed, can mark on the icon drawn through setting up the writing pen, be convenient for understand the study, after demonstration teaching aid uses the end, through wiping of wiping the body, can clear away the vestige of writing on the demonstration teaching aid, the used repeatedly of being convenient for.

The utility model discloses demonstration teaching aid, including first demonstration board, one side of first demonstration board is equipped with first scale mark and many datum lines that are parallel to each other, and first scale mark is perpendicular with the datum line. Through being provided with the datum line on first demonstration board, can be at the in-process that the teacher was drawn, drawing according to the datum line, reduced the drawing work of datum line before drawing, can save drawing time at the in-process of classroom teaching, improve the utilization ratio of time, first scale mark is perpendicular with the datum line, and the shape size of the figure of drawing in-process can be measured to first scale mark of perpendicular setting, makes things convenient for the teacher to draw the chart simply, fast.

The utility model discloses a teaching aid subassembly, including the writing pen, clean the body and foretell demonstration teaching aid, setting through the demonstration teaching aid, can simplify the step that the teacher drafted, save the time of drawing, use the writing pen to write on the demonstration teaching aid, can annotate the figure of drawing, the teacher of being convenient for gives lessons to the student, the student of being convenient for gives lessons the further understanding of content, use after the demonstration teaching aid uses and clean the writing vestige that the board will demonstrate on the teaching aid and clean, can guarantee the cleanness of demonstration teaching aid, be convenient for demonstrate the reuse of teaching aid neatly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is one of schematic structural diagrams of a demonstration teaching aid provided by an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a demonstration teaching aid provided by an embodiment of the present invention;

fig. 3 is a schematic view of a connection structure of a first limiting member and a second limiting member according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a teaching aid assembly provided by the embodiment of the present invention.

Icon: 100-demonstration teaching aid; 110-a first demonstration board; 111-first tick mark; 112-a reference line; 113-a receiving groove; 1130-a second stop; 114-an adsorbate; 115-a handle; 120-a second demonstration board; 121-model cylinder line; 122-a first stop; 123-second tick mark; 130-writing board; 131-a dust collecting plate; 140-a storage box; 150-a vacuum cleaner; 151-suction tube; 160-a scaffold; 161-a first scaffold; 162-a second support; 163-anti-skid feet; 200-a teaching aid component; 210-a writing pen; 220-wiping body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as 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 present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a demonstration teaching aid 100 refers to fig. 1, including first demonstration board 110, one side of first demonstration board 110 is equipped with first scale mark 111 and many reference lines 112 that are parallel to each other, and first scale mark 111 is perpendicular with reference line 112.

In the process of classroom teaching, the demonstration teaching aid 100 of the embodiment can be used for simply and quickly drawing graphs, thereby saving classroom time and improving the time utilization rate of classroom. Specifically, on the teaching class, the teaching personnel can use this demonstration teaching aid 100, and place demonstration teaching aid 100 on the supporter in the classroom (for example, on the lectern), many datum lines 112 that are parallel to each other that set up through one side of demonstration teaching aid 100 are as the benchmark, can adopt the drawing thing (for example, the chalk, writing pen 210 etc.) to draw the required figure of teaching on the datum line 112 that sets for, at the in-process of drawing, can measure the size range who draws the figure according to first scale mark 111, in order to ensure the accuracy of the figure of drawing. The teaching staff can draw the graph required by the lesson according to the first scale mark 111 and the plurality of the reference lines 112 which are parallel to each other, and the graph is used for classroom teaching, so that the time can be saved, and the time utilization rate can be improved.

It should be noted that, first, one side of the first demonstration board 110 is provided with the first scale mark 111, and the setting mode, the setting number and the setting position of the first scale mark 111 on the first demonstration board 110 are not specifically limited in this embodiment, and the user can set the first scale mark according to the actual use requirement. For example, the first scale mark 111 may be disposed at a position on one side of the first demonstration board 110 and close to one end, and the position can ensure that the first demonstration board 110 has a larger space for drawing a figure, and the first scale mark 111 may also be disposed at a middle position of the first demonstration board 110, so that when drawing is performed on the left and right sides of the first scale mark 111, the first scale mark 111 can be accurately referred to, and the accuracy of drawing is ensured; the first scale mark 111 may be provided as one or two opposite lines; the first graduation mark 111 can be attached to one side of the first demonstration board 110 by using a graduation sticker, and the first graduation mark 111 can also be scribed on the first demonstration board 110.

Secondly, a plurality of mutually parallel reference lines 112 are disposed on one side of the first demonstration board 110, the setting manner, the number of the reference lines 112 and the setting position are not particularly limited in this embodiment, and the setting of the first scale marks 111 is referred to, which is not described herein again. And the first scale mark 111 is perpendicular to the reference line 112, so that accurate drawing can be ensured by referring to the scale mark, and the drawn graph is prevented from being inaccurate and influencing the normal learning of students. In the present embodiment, the first scale mark 111 refers to a scale mark formed by a plurality of scale values, and can be used to measure the accuracy of a drawn graph within a distance.

The embodiment of the utility model provides a demonstration teaching aid 100, including first demonstration board 110, can write the characters on this first demonstration board 110, draw the figure, the teaching personnel of being convenient for adopt this first demonstration board 110 to teach, one side of first demonstration board 110 is equipped with first scale mark 111 and many reference lines 112 that are parallel to each other, many reference lines 112 that are parallel to each other can predetermine the environment that a drawing figure in one side of first demonstration board 110, one side teaching personnel who is equipped with reference line 112 at this first demonstration board 110 can carry out the preparation of figure according to the benchmark that reference line 112 confirmed, accelerate the speed of drawing, classroom time has been saved, also can make full use of classroom time. The first scale mark 111 is perpendicular to the reference line 112, and the first scale mark 111 arranged perpendicular to the reference line 112 enables a teaching worker to have a size reference when drawing a graph, so that the drawn graph is prevented from being inaccurate, and the accuracy of the drawn graph can be ensured.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further includes a second demonstration board 120, the second demonstration board 120 is connected to the first demonstration board 110, and a plurality of parallel model posts 121 are disposed on one side of the second demonstration board 120.

It should be noted that, first, the demonstration teaching aid 100 that this embodiment provided still includes second demonstration board 120, and second demonstration board 120 is connected with first demonstration board 110, specifically means that second demonstration board 120 is connected with the terminal surface of first demonstration board 110 through the terminal surface, connects to become a whole. For example, the first demonstration board 110 and the second demonstration board 120 are both rectangular parallelepiped plates, each of the first demonstration board 110 and the second demonstration board 120 includes two side surfaces and four end surfaces, the first demonstration board 110 and the second demonstration board 120 are connected by the end surfaces, and the connected first demonstration board 110 and the connected second demonstration board 120 are similar to table tops spliced together.

Second, a plurality of model pillar lines 121 are provided in parallel on one side of the second demonstration plate 120, and the side of the second demonstration plate 120 on which the model pillar lines 121 are provided may be coplanar with the side of the first demonstration plate 110 on which the reference line 112 is provided, or may be coplanar with the side of the first demonstration plate 110 on which the reference line 112 is provided. The plurality of parallel model pillar lines 121 may be uniformly arranged, or two adjacent model pillar lines 121 may be arranged in pairs parallel to two other adjacent model pillar lines 121.

Optionally, referring to fig. 2 and 3, an end of the first demonstration board 110 is provided with an accommodating groove 113 with an opening, the second demonstration board 120 is movably disposed in the accommodating groove 113 through the opening, and the side surfaces of the first demonstration board 110 and the second demonstration board 120 are parallel.

It should be noted that, the end of the first demonstration board 110 is provided with an accommodating groove 113, the accommodating groove 113 is used for accommodating the second demonstration board 120, and when the second demonstration board 120 is used or is not suitable for use, the second demonstration board 120 can be accommodated in the accommodating groove 113, so that the space is saved, and the second demonstration board 120 can be prevented from being accidentally damaged. The containing groove 113 formed at the end of the first demonstration board 110 has an opening, and when the second demonstration board 120 is not used, the second demonstration board 120 can be placed in the containing groove 113 through the opening; when using second demonstration board 120, can pull out second demonstration board 120 through this opening and use, the open-ended setting is convenient for user of service to the use of second demonstration board 120 with deposit, saves user of service use or deposit the time of second demonstration board 120.

Wherein, the mobilizable setting of second demonstration board 120 is in storage tank 113, and the side of first demonstration board 110 and second demonstration board 120 is parallel, and is concrete, and second demonstration board 120 can gliding setting in storage tank 113, also can rolling setting in storage tank 113, and the example is provided with the slider on the second demonstration board 120, is provided with the slide in storage tank 113, through the slip of slider in the slide for second demonstration board 120 slides in storage tank 113.

Optionally, referring to fig. 2 and fig. 3, a first limiting member 122 is disposed on the second demonstration board 120, a second limiting member 1130 is disposed in the accommodating groove 113, and the first limiting member 122 and the second limiting member 1130 are matched to fix the position of the second demonstration board 120 in the accommodating groove 113.

It should be noted that the first limiting member 122 and the second limiting member 1130, which are used in cooperation with each other, are disposed on the first demonstration board 110 and the second demonstration board 120, and the first limiting member 122 and the second limiting member 1130 are used in cooperation with each other, so that the position of the second demonstration board 120 in the accommodating groove 113 of the first demonstration board 110 can be positioned, and the second demonstration board 120 or the first demonstration board 110 is prevented from being damaged due to the sliding of the second demonstration board 120. For example, the first limiting member 122 and the second limiting member 1130 may be a male buckle and a female buckle, or may be a clamping hole and a clamping head, and the first limiting member 122 and the second limiting member 1130 are not specifically limited in this embodiment, and those skilled in the art can use the limiting member according to actual requirements.

Optionally, referring to fig. 2, a second graduation mark 123 is further disposed on one side of the second demonstration board 120, and the second graduation mark 123 is perpendicular to the model pillar line 121.

It should be noted that the second demonstration board 120 is further provided with a second scale mark 123 on the side where the model pillar mark 121 is provided, the second scale mark 123 is perpendicular to the model pillar mark 121, and the second scale mark 123 is mainly used for measuring the height of the model pillar formed by the model pillar mark 121, so as to ensure the accuracy of the drawn graph in the classroom teaching. In this embodiment, the second scale mark 123 refers to a scale mark formed by a plurality of scale values, and can be used to measure the height of the patterned pillar within a certain distance.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further comprises a writing board 130, and one end of the writing board 130 is connected to the first demonstration board 110.

It should be noted that the demonstration teaching aid 100 provided in this embodiment further includes a writing board 130, one end of the writing board 130 is connected to the first demonstration board 110, specifically, any end of the writing board 130 is connected to one end of the first demonstration board 110, and the writing board 130 can explain and explain the graphics drawn on the first demonstration board 110, which can facilitate teaching by teachers and learning by students.

Optionally, referring to fig. 2, the demonstration aid 100 further comprises a storage box 140, and the storage box 140 is disposed at an end of the writing board 130 far from the first demonstration board 110.

It should be noted that this demonstration teaching aid 100 still includes receiver 140, and receiver 140 locates the one end that clipboard 130 kept away from first demonstration board 110, can be used for accomodating and store the object that needs to use in the classroom (for example, writing pen 210 etc.), through accomodating of receiver 140 and store, the use object that the personnel of giving lessons in the classroom can be timely of being convenient for also can save the time in classroom.

Optionally, referring to fig. 2, a dust receiving plate 131 is disposed at one end of the writing board 130.

It should be noted that, one end of the writing board 130 is provided with a dust receiving board 131, and the purpose of the dust receiving board 131 is to receive sundries such as dust on the writing board 130 onto the dust receiving board 131, so as to avoid the dust on the writing board 130 from floating and affecting the teaching environment; the dust collecting plate 131 can be used for storing objects in a short time, so that teaching staff can conveniently place the objects in a classroom. For example, when chalk is used for writing, the dust receiving plate 131 can receive dust, so that the situation that dust flies randomly to cause poor environment of teachers is avoided; when the teaching staff gives lessons, the chalks can be placed on the dust collecting plate 131 for a short time, and are convenient to take and use in time.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further comprises a dust collector 150 and a suction pipe 151 communicated with the dust collector 150, wherein the suction pipe 151 is arranged on the dust collecting plate 131.

It should be noted that, the dust collector 150 is provided, and the suction pipe 151 of the dust collector 150 is arranged on the dust receiving plate 131, so that dust on the dust receiving plate 131 can be absorbed, the working strength of workers for cleaning dust is reduced, dust can be sucked in time through the dust collector 150, and the cleanness and sanitation of the teaching environment can also be kept.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further includes an adsorption stone 114, and the adsorption stone 114 is adsorbed on the first demonstration board 110.

It should be noted that the demonstration teaching aid 100 that this embodiment provided still includes adsorption stone 114, and this adsorption stone 114 adsorbs on first demonstration board 110, can mark the outline of figure on first demonstration board 110 through adsorption stone 114's adsorption, and the person of being convenient for draws the figure through adsorption stone 114 as the reference. For example, when a line graph needs to be drawn, the adsorption stone 114 is firstly adsorbed on the first demonstration board 110, the break point of the line graph is determined by the adsorption stone 114, and then two adjacent adsorption stones 114 are connected by the writing tool, so that a required line graph is drawn.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further comprises a bracket 160, and the bracket 160 is connected to the first demonstration board 110.

It should be noted that demonstration teaching aid 100 still includes support 160, and this support 160 is connected first demonstration board 110, and the main effect of support 160 is exactly can support first demonstration board 110, prevents that the height of first demonstration board 110 from crossing lowly, influences student's sight, influences student's learning effect.

Optionally, referring to fig. 2, the support frame 160 includes a first support frame 161 and a second support frame 162, the first support frame 161 is connected to the first demonstration board 110, and the first support frame 161 and the second support frame 162 are positioned to be nested with each other.

It should be noted that the support 160 is used for supporting the first demonstration board 110, the support 160 includes a first support 161 and a second support 162, the first support 161 is connected to the first demonstration board 110, the first support 161 and the second support 162 are sleeved with each other, and the first support 161 and the second support 162 sleeved with each other can change the overall height of the support 160, and can be applied to different teaching environments. For example, when the teaching environment is narrow, the first support 161 and the second support 162 may be sleeved together, and the height of the sleeved first support 161 and the sleeved second support 162 is low, so that the narrow teaching environment can be satisfied.

The first support 161 and the second support 162 are sleeved with each other in a positionable manner, specifically, the first support 161 is sleeved in the second support 162, or the second support 162 is sleeved in the first support 161, and the sleeving manner of the first support 161 and the second support 162 is set according to actual needs of those skilled in the art. The mutual sleeved positions of the first support 161 and the second support 162 can be fixed, specifically can be positioned through friction, and also can be positioned through a positioning piece, for example, a buckle is positioned by clamping with a clamping hole, a male buckle is positioned by buckling with a female buckle, and the like.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further comprises an anti-slip foot 163, one end of the bracket 160 is connected to the first demonstration board 110, and the other end of the bracket 160 is connected to the anti-slip foot 163.

It should be noted that the demonstration teaching aid 100 of the embodiment further includes an anti-slip foot 163, one end of the bracket 160 is connected to the first demonstration board 110, the other end is connected to the anti-slip foot 163, and the anti-slip foot 163 is provided to help prevent the bracket 160 from sliding on the surface of the object to be contacted (for example, the ground and the desk), which may cause the break of the demonstration teaching aid 100 and also affect the learning progress of the student, so that the teaching progress of the lecturer is slow.

Optionally, referring to fig. 2, the demonstration teaching aid 100 further comprises a handle 115, and the handle 115 is disposed on the first demonstration board 110.

It should be noted that, the purpose of setting up handle 115 on first demonstration board 110 can mention first demonstration board 110, and after demonstration teaching aid 100 used or when not using, can carry demonstration teaching aid 100 through handle 115, and convenient to use person can strengthen user's comfort in use to taking of demonstration teaching aid 100.

The utility model also provides a teaching aid subassembly 200, refer to FIG. 4, including writing pen 210, wiping body 220 and foretell demonstration teaching aid 100, writing pen 210 is used for writing on demonstration teaching aid 100, and wiping body 220 is used for wiping the vestige of writing on demonstration teaching aid 100.

It should be noted that the teaching aid assembly 200 provided by the embodiment includes the writing pen 210, the wiping body 220 and the demonstration teaching aid 100, and the steps of drawing the figure can be simplified through the arrangement of the demonstration teaching aid 100, so that the drawing time can be saved, and the classroom time can be fully and effectively utilized. A writing pen 210 (e.g., chalk and marker) may be used to write on the demonstration aid 100 to illustrate the graphics drawn on the first demonstration board 110 for ease of understanding. The main function of the wiping body 220 (e.g., wiping plate) is to wipe the trace written by the pen 210 on the demonstration teaching aid 100 clean, so as to prevent the written trace from affecting the subsequent drawing and writing, and to enable the demonstration teaching aid 100 to be reused.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A demonstration teaching aid is characterized by comprising a first demonstration board, wherein one side of the first demonstration board is provided with a first scale mark and a plurality of datum lines which are parallel to each other, and the first scale mark is perpendicular to the datum lines;

the demonstration teaching aid is characterized by further comprising a second demonstration board, the second demonstration board is connected with the first demonstration board, and a plurality of parallel model column lines are arranged on one side of the second demonstration board.

2. A demonstration teaching aid according to claim 1 wherein the end of the first demonstration board is provided with a receiving groove with an opening, the second demonstration board is movably arranged in the receiving groove through the opening, and the side surfaces of the first demonstration board and the second demonstration board are parallel.

3. A demonstration teaching aid according to claim 2 wherein a first limiting member is provided on the second demonstration board, a second limiting member is provided in the receiving slot, and the first limiting member cooperates with the second limiting member to fix the position of the second demonstration board in the receiving slot.

4. A demonstration teaching aid according to claim 1 wherein one side of the second demonstration board is further provided with second graduation marks perpendicular to the model post lines.

5. A demonstration teaching aid according to claim 1 further comprising a writing board, one end of the writing board being connected to the first demonstration board.

6. A demonstration teaching aid according to claim 5 further comprising a storage box located at an end of the writing board remote from the first demonstration board.

7. A demonstration teaching aid according to claim 5, characterized in that the demonstration teaching aid further comprises a dust collector and a suction pipe communicated with the dust collector, a dust collecting plate is arranged at one end of the writing plate, and the suction pipe is arranged on the dust collecting plate.

8. A demonstration teaching aid according to any one of claims 1 to 7 further comprising an adsorption stone adsorbed on the first demonstration board.

9. A teaching aid assembly comprising a writing pen for writing on the demonstration teaching aid, a wiping body for wiping writing traces on the demonstration teaching aid and the demonstration teaching aid of any one of claims 1 to 8.

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