Demonstration blackboard

Abstract

The utility model relates to the technical field of education and teaching, and discloses a demonstration blackboard which comprises a blackboard body, the left end of the blackboard body is fixedly connected with a protection mechanism, the lower end of the blackboard body is fixedly connected with a supporting column, the lower end of the supporting column is fixedly connected with a base, and the lower end of the base is fixedly connected with a brake wheel. The protection mechanism comprises a rotating rod, the rotating rod is fixedly connected to the left end of the blackboard body, and the outer wall of the rotating rod is movably connected with a protection shell through a bearing. According to the demonstration blackboard, the protection shell, the sliding block, the wiping cloth, the storage box and other parts are used in cooperation, so that the protection shell can rotate, flying chalk dust can be covered in the protection shell through the protection shell during wiping, and the situation that the chalk dust overflows and is inhaled by a human body to affect health is prevented; and the wiping cloth is directly translated by the shifting block, so that cleaning can be completed without repeated wiping.

Description

Technical Field

[0001] The utility model relates to the technical field of education and teaching, in particular to a demonstration blackboard. Background Art

[0002] In the field of education, foreign language teaching is particularly important, especially in today's globalized world. However, traditional teaching methods usually rely on teachers' oral explanations and blackboard writing, which requires the use of a demonstration blackboard. However, a demonstration blackboard does not specifically refer to a black board. In the traditional sense, it is a flat surface that can be written on repeatedly. The board is hard and is mostly used for teaching. In English teaching, teachers often need to use demonstration blackboards to write on the blackboard to teach words.

[0003] After searching, the patent number is 201922236882.2, and the name is a new type of practical demonstration blackboard for Russian teaching, including a support plate and side panels on both sides of the support plate, the side panels are hinged to the support plate, and two vertically arranged small blackboards are provided on the surface of the side panels. The two small blackboards are respectively provided with side panel protruding blocks, and the side panel protruding blocks are provided with a detachable blackboard eraser. The blackboard eraser is slidably connected to the side panel protruding blocks, and the surface of the support plate is provided with a left blackboard and a right blackboard, and the left blackboard is fixed to the surface of the support plate.

[0004] Through research and analysis, it was found that although the new practical device can rotate the angle on the device surface and increase the height of the device, it is more convenient for teaching and meets different needs. However, in actual use, when the demonstration blackboard needs to be cleaned after writing on the demonstration blackboard, the teacher needs to wipe it multiple times when using the eraser to erase a large area of ​​blackboard writing, which takes too long and affects the quality of class. In addition, when the eraser is used to erase the blackboard, chalk dust flies and pollutes the environment. Chalk dust is also easily inhaled by people, affecting their health, thereby affecting the entire teaching environment. Utility Model Content

[0005] The utility model aims to provide a demonstration blackboard to solve the problems in the background technology that chalk dust flies and pollutes the environment when erasing blackboard writing with a blackboard eraser and that the erasing times are too many and the time is too long.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a demonstration blackboard, including a blackboard main body, a protective mechanism is fixedly connected to the left end of the blackboard main body, a support column is fixedly connected to the lower end of the blackboard main body, a base is fixedly connected to the lower end of the support column, and a brake wheel is fixedly connected to the lower end of the base.

[0007] The protective mechanism includes a rotating rod, which is fixedly connected to the left end of the blackboard body. The outer wall of the rotating rod is movably connected to a protective shell through a bearing. A sliding groove is provided at the front end of the blackboard body. A sliding block is slidably connected to the inner wall of the sliding groove. The front end of the sliding block is fixedly connected to an L-shaped connecting rod. A replacement component is arranged below the L-shaped connecting rod. A movable groove is provided at the front end of the protective shell.

[0008] Preferably, a fixing groove is provided at the lower end of the blackboard body, a spring is fixedly connected to the lower end of the inner wall of the fixing groove, and a stopper is fixedly connected to the spring.

[0009] Preferably, a T-shaped slot is provided at the front end of the blackboard body, a T-shaped block is slidably connected to the inner wall of the T-shaped slot, and a storage box is fixedly connected to the front end of the T-shaped block.

[0010] Preferably, a rear end of the protective shell is fixedly connected to a limiting block, and an outer wall of the limiting block is fixedly connected to a rubber ring.

[0011] Preferably, a limiting groove is provided at the front end of the blackboard body, and the outer wall of the rubber ring is matched with the inner wall of the limiting groove.

[0012] Preferably, the replacement assembly includes a threaded block, which is movably connected to the lower end of the connecting rod through a bearing, and the outer wall of the threaded block is threadedly connected to a threaded tube, and the outer wall of the threaded tube is provided with a wiping cloth.

[0013] Preferably, the outer wall of the threaded tube is movably connected to a shift block via a bearing, and the shift block is movably connected to the inner wall of the movable groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The demonstration blackboard is used in combination with its protective shell, slider, wiping cloth, storage box and other parts, so that the protective shell can be rotated, so that when wiping, the flying chalk dust can be covered in the protective shell to prevent overflow and be inhaled by the human body to affect health. Secondly, the wiping cloth can be directly translated by the dial block, and cleaning can be completed without wiping multiple times.

[0016] 2. The demonstration blackboard, by using its replacement components, using its threaded block, threaded tube and wiping cloth and other parts, can make the threaded block detach from the threaded tube by rotating it, so that the wiping cloth can be replaced, making the blackboard wiped more clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2This is a schematic diagram of the cross-sectional structure of a replacement component of the utility model from a side view;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the connection between the spring and the stopper of the utility model from a side view;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model without the protective cover;

[0021] Figure 5 This is a schematic diagram of the rear view structure of the protective shell of the utility model.

[0022] In the figure: 1. blackboard body; 2. protection mechanism; 201. rotating rod; 202. protective shell; 203. slide groove; 204. slider; 205. L-shaped connecting rod; 206. replacement component; 2061. threaded block; 2062. threaded tube; 2063. wiping cloth; 2064. dial block; 207. movable groove; 208. fixed groove; 209. spring; 210. stopper; 211. T-slot; 212. T-block; 213. storage box; 214. limit block; 215. rubber ring; 216. limit groove; 3. support column; 4. base; 5. brake wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides the following technical solutions:

[0025] Embodiment 1

[0026] See also Figure 1-5 A demonstration blackboard includes a blackboard body 1, a protective mechanism 2 is fixedly connected to the left end of the blackboard body 1, a supporting column 3 is fixedly connected to the lower end of the blackboard body 1, a base 4 is fixedly connected to the lower end of the supporting column 3, and a brake wheel 5 is fixedly connected to the lower end of the base 4.

[0027] The protection mechanism 2 includes a rotating rod 201, which is fixedly connected to the left end of the blackboard body 1. The outer wall of the rotating rod 201 is movably connected to a protective shell 202 through a bearing. A slide groove 203 is provided at the front end of the blackboard body 1. A slider 204 is slidably connected to the inner wall of the slide groove 203. An L-shaped connecting rod 205 is fixedly connected to the front end of the slider 204. A replacement component 206 is arranged below the L-shaped connecting rod 205. A movable groove 207 is provided at the front end of the protective shell 202. By using the protective shell 202, the slider 204, the wiping cloth 2063, the storage box 213 and other parts in combination, the protective shell 202 can be rotated so that the flying chalk dust can be covered in the protective shell 202 through the protective shell 202 when wiping, so as to prevent overflow and inhalation by the human body and affect health. Secondly, by turning the dial block 2064, the dial block 2064 can directly translate the wiping cloth 2063, and cleaning can be completed without wiping multiple times.

[0028] Furthermore, a fixing groove 208 is opened at the lower end of the blackboard body 1, and a spring 209 is fixedly connected to the lower end of the inner wall of the fixing groove 208, and a stopper 210 is fixedly connected to the spring 209. By using the fixing groove 208 and the spring 209 and the stopper 210 in combination, the spring 209 is fixedly connected to the inner wall of the fixing groove 208, which facilitates the movement of the stopper 210 and makes it possible to limit the threaded tube 2062, making the subsequent wiping faster and more convenient.

[0029] Furthermore, a T-slot 211 is provided at the front end of the blackboard body 1, and a T-block 212 is slidably connected to the inner wall of the T-slot 211, and a storage box 213 is fixedly connected to the front end of the T-block 212. By using the T-block 212 in combination with the T-slot 211, the storage box 213 can be installed in the T-slot 211 through the T-block 212 to store chalk dust, and the T-block 212 is detached from the T-slot 211, which can facilitate the dumping of the storage box 213.

[0030] Furthermore, the rear end of the protective shell 202 is fixedly connected to a limiting block 214, and the outer wall of the limiting block 214 is fixedly connected to a rubber ring 215. By using the limiting block 214 and the rubber ring 215, the rubber ring 215 is fixed to the outer wall of the limiting block 214, which facilitates the subsequent fixation of the position of the protective shell 202.

[0031] Furthermore, a limiting groove 216 is provided at the front end of the blackboard body 1, and the outer wall of the rubber ring 215 is matched with the inner wall of the limiting groove 216. By using the limiting groove 216 and the rubber ring 215, when the protective shell 202 is protecting the blackboard body 1, the rubber ring 215 can enter the limiting groove 216, thereby facilitating the limiting of the protective shell 202.

[0032] Embodiment 2

[0033] Combination Figure 1-5 On the basis of the first embodiment, a replacement component 206 is further obtained, which includes a threaded block 2061, which is movably connected to the lower end of the connecting rod through a bearing, and the outer wall of the threaded block 2061 is threadedly connected to a threaded tube 2062, and the outer wall of the threaded tube 2062 is provided with a wiping cloth 2063. By using its replacement component 206, by using its threaded block 2061, threaded tube 2062 and wiping cloth 2063 and other parts, the threaded block 2061 can be rotated so that the threaded block 2061 can be detached from the threaded tube 2062, so that the wiping cloth 2063 can be replaced, so that the blackboard can be wiped cleaner.

[0034] Furthermore, the outer wall of the threaded tube 2062 is movably connected to a shift block 2064 via a bearing, and the shift block 2064 is movably connected to the inner wall of the movable groove 207. By using the shift block 2064 in combination with the movable groove 207, the shift block 2064 is moved in the movable groove 207, so that the wiping cloth 2063 on the outer wall of the threaded tube 2062 connected to the shift block 2064 can wipe a large area, which is convenient for one-time wiping.

[0035] In actual operation, when the device is used, the device is assembled first. When the blackboard body 1 needs to be cleaned, the block 210 is first pressed against the spring 209 and then moved through the shift block 2064, so that the block 210 does not restrict the use of the wiping cloth 2063. Then, the protective shell 202 is rotated through the rotating rod 201, and the rubber ring 215 can enter the limiting groove 216. Then, the shift block 2064 is moved so that the shift block 2064 moves in the movable groove 207, so that it is convenient to wipe the front of the blackboard body 1. When the cleaning time is too long, the wiping cloth 2063 can be cleaned and disassembled and replaced. At this time, the threaded block 2061 can be rotated, and the threaded block 2061 can be separated from the threaded tube 2062. At this time, the threaded tube 2062 can be replaced as a whole to clean the wiping cloth 2063, and then the threaded tube 2062 can be installed again. After cleaning the blackboard main body 1, the dust and debris after wiping falls into the storage box 213. When cleaning is needed, the T-block 212 connected to the storage box 213 can be pulled out of the T-slot 211 and then dumped.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A demonstration blackboard, comprising a blackboard body (1), characterized in that: The left end of the blackboard body (1) is fixedly connected to a protective mechanism (2), the lower end of the blackboard body (1) is fixedly connected to a support column (3), the lower end of the support column (3) is fixedly connected to a base (4), and the lower end of the base (4) is fixedly connected to a brake wheel (5); The protective mechanism (2) comprises a rotating rod (201), the rotating rod (201) is fixedly connected to the left end of the blackboard body (1), the outer wall of the rotating rod (201) is movably connected to a protective shell (202) via a bearing, the front end of the blackboard body (1) is provided with a sliding groove (203), the inner wall of the sliding groove (203) is slidably connected to a slider (204), the front end of the slider (204) is fixedly connected to an L-shaped connecting rod (205), a replacement component (206) is arranged below the L-shaped connecting rod (205), and the front end of the protective shell (202) is provided with a movable groove (207).

2. A demonstration blackboard according to claim 1, characterized in that: A fixing groove (208) is provided at the lower end of the blackboard body (1), a spring (209) is fixedly connected to the lower end of the inner wall of the fixing groove (208), and a stopper (210) is fixedly connected to the spring (209).

3. A demonstration blackboard according to claim 2, characterized in that: The front end of the blackboard body (1) is provided with a T-shaped groove (211), the inner wall of the T-shaped groove (211) is slidably connected with a T-shaped block (212), and the front end of the T-shaped block (212) is fixedly connected with a storage box (213).

4. A demonstration blackboard according to claim 1, characterized in that: The rear end of the protective shell (202) is fixedly connected to a limiting block (214), and the outer wall of the limiting block (214) is fixedly connected to a rubber ring (215).

5. A demonstration blackboard according to claim 4, characterized in that: A limiting groove (216) is provided at the front end of the blackboard body (1), and the outer wall of the rubber ring (215) is matched with the inner wall of the limiting groove (216).

6. A demonstration blackboard according to claim 1, characterized in that: The replacement component (206) comprises a threaded block (2061), wherein the threaded block (2061) is movably connected to the lower end of the connecting rod via a bearing, the outer wall of the threaded block (2061) is threadedly connected to a threaded tube (2062), and the outer wall of the threaded tube (2062) is provided with a wiping cloth (2063).

7. A demonstration blackboard according to claim 6, characterized in that: The outer wall of the threaded tube (2062) is movably connected to a shift block (2064) via a bearing, and the shift block (2064) is movably connected to the inner wall of the movable groove (207).

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