College Chinese writing teaching demonstration device

Abstract

The utility model discloses a college Chinese writing teaching demonstration device, which relates to the technical field of demonstration devices and comprises a frame body, a rolling mechanism is arranged in the frame body, a cleaning mechanism is arranged on the bottom surface of the frame body, and the cleaning mechanism comprises a cleaning frame fixedly communicated with a reserved groove on the bottom surface of the frame body. The cleaning mechanism comprises a cleaning frame, a scraper fixed to the inner wall of the cleaning frame and used for scraping dust, a dust collection assembly connected with the cleaning frame, and a storage assembly connected with the dust collection assembly. According to the utility model, through the arrangement of the rolling mechanism, the projection cloth can be rolled conveniently, so that the projection cloth can be matched with a projector to project and display images, and through the arrangement of the cleaning mechanism, the projection cloth can be adsorbed conveniently through the dust collection assembly, so that the projection cloth can be stably attached to the scraper blade to scrape dust. And the scraped dust can be collected and stored through the dust collection assembly and the storage assembly, and subsequent cleaning of the collected dust can be facilitated.

Description

Technical Field

[0001] This utility model relates to the field of demonstration device technology, specifically a demonstration device for teaching Chinese writing in college. Background Technology

[0002] Composition teaching requires a focus on training in writing narrative, expository, argumentative, and practical texts. In university Chinese writing instruction, since university classrooms are usually large, such as lecture halls, projectors and demonstration devices are typically used for teaching demonstrations.

[0003] Demonstration devices use mechanical mechanisms and tools to display something, and they are used in many fields. In teaching, demonstration devices use projectors to project images onto a screen, which are then explained and demonstrated by the teacher.

[0004] Traditional demonstration devices typically use projectors and unfolded screens to display images. However, screens tend to attract dust after being unfolded for extended periods, and if not cleaned regularly, this can affect the projection quality of subsequent images, resulting in students not being able to see the images of Chinese writing materials clearly. To address these issues, we have developed a demonstration device for university Chinese writing instruction. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a demonstration device for teaching Chinese writing in college. This device can easily scrape off the dust on the surface of the screen and collect and store the scraped dust to prevent dust from adhering to the screen and affecting subsequent teaching demonstrations.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a demonstration device for teaching Chinese writing in college, comprising a frame, a winding mechanism disposed inside the frame, a cleaning mechanism disposed on the bottom surface of the frame, the cleaning mechanism comprising a cleaning frame fixedly connected to a pre-reserved groove on the bottom surface of the frame, and a scraper fixed to the inner wall of the cleaning frame for scraping off dust, the cleaning mechanism further comprising a dust-collecting component connected to the cleaning frame, and a storage component connected to the dust-collecting component.

[0007] Furthermore, the winding mechanism includes a servo motor mounted on the outer surface of the frame. The output shaft of the servo motor rotates through the outer surface of the frame and is fixedly connected to a winding roller. The outer end of the winding roller is rotatably connected to the inner sidewall of the frame. By setting a servo motor, it is easy to drive the subsequent display components to wind up and unwind, thereby enabling the display components to display images of Chinese writing materials in conjunction with a projector.

[0008] Furthermore, the winding mechanism also includes a projection cloth wound around the outer surface of the winding roller for projection, and a stop bar fixed to the outer end of the projection cloth. The inner wall of the frame is rotatably connected to a guide rod for limiting the position of the projection cloth. By setting the projection cloth, it is easy to display images of Chinese writing materials with a projector, which is convenient for teachers to give speeches. The stop bar can prevent the projection cloth from being completely rolled into the inside of the frame when it is rolled up to the end.

[0009] Furthermore, the dust collection assembly also includes an L-shaped frame fixed to the inner wall of the cleaning frame, and an air extraction head connected to a pre-drilled hole on the outer surface of the L-shaped frame. The outer surface of the air extraction head is provided with an air extraction hole for sucking in dust. By setting the dust collection assembly, the L-shaped frame inside the dust collection assembly can easily create a cavity between it and the cleaning frame, thereby allowing the subsequent drive component to extract the gas in the cavity. This enables the air extraction head to adsorb the projection cloth, ensuring that the projection cloth can make stable contact with the scraper and that the dust can be scraped off.

[0010] Furthermore, the dust collection assembly also includes an air pump installed on the outer surface of the cleaning frame, and the connection end of the air pump passes through the outer surface of the cleaning frame and communicates with the inner cavity of the cleaning frame. By setting the dust collection assembly and the air pump inside the dust collection assembly, it is convenient to pump air into the cavity between the L-shaped frame and the cleaning frame, thereby facilitating the extraction of dust.

[0011] Furthermore, the storage component includes a collection frame that is slidably connected to the bottom surface of the L-shaped frame. The collection frame is used to store dust. By setting the storage component and the collection frame inside the storage component, it is possible to store the dust sucked in by the air extraction hole. Thus, after the projection cloth is rolled up, the dust will remain in the collection frame and settle, which will facilitate subsequent cleaning.

[0012] Furthermore, the storage component also includes a connecting strip fixed to the outer surface of the collection frame, and the outer end of the connecting strip slides through the inner sidewall of the cleaning frame and is fixedly connected to a pull plate. By setting the storage component, the connecting strip and pull plate inside the storage component can facilitate pulling the collection frame out of the cleaning frame, thereby cleaning the dust inside the collection frame.

[0013] Furthermore, the bottom surface of the baffle is fixedly connected with several connecting rings, and the upper surface of the frame is fixedly connected with an installation plate. By setting the connecting rings, it is easy to connect the connecting rings to the reserved connecting rods on the wall after the projection screen is unfolded, thereby avoiding the projection screen from shaking due to the wind and preventing students from having a clear view due to the shaking of the projection screen.

[0014] Compared with existing technologies, this university Chinese writing teaching demonstration device has the following beneficial effects:

[0015] 1. This utility model, by setting a winding mechanism, can easily wind up the projection cloth, so that the projection cloth can be used with a projector to project and display images. The cleaning mechanism can easily absorb the projection cloth through the dust suction component, so that the projection cloth can be stably attached to the scraper to remove dust. The dust removed can be collected and stored through the dust suction component and the storage component, which can also facilitate the subsequent cleaning of the collected dust.

[0016] 2. This utility model, by setting an installation plate, makes it easy to hang the entire device on the wall. The connecting ring can limit the hanging position after the projection screen is unfolded, preventing the projection screen from floating and shaking and affecting the image of Chinese writing teaching. The guide rod can easily limit and guide the projection screen and reduce the friction between the projection screen and the frame, preventing the projection screen from being damaged due to excessive friction. Attached Figure Description

[0017] Figure 1 This is a three-dimensional front view of the overall device of this utility model;

[0018] Figure 2 This is a three-dimensional side view of the overall device of this utility model;

[0019] Figure 3 This is a three-dimensional side sectional view of the winding mechanism of this utility model;

[0020] Figure 4 This is a three-dimensional structural cross-sectional view of the cleaning mechanism of this utility model;

[0021] Figure 5 This utility model Figure 4 A magnified view of a portion of point A in the middle.

[0022] In the diagram: 1. Frame; 2. Winding mechanism; 201. Winding roller; 202. Servo motor; 203. Projection cloth; 204. Stop bar; 205. Guide rod; 3. Cleaning mechanism; 301. Cleaning frame; 302. Scraper; 303. L-shaped frame; 304. Air pump; 305. Air extraction head; 306. Air extraction hole; 307. Collection frame; 308. Connecting strip; 309. Pull plate; 4. Connecting ring; 5. Mounting plate. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] As described in the background section, screens tend to attract dust after being unfolded for a long time. If they are not cleaned for a long time, it can affect the projection effect of subsequent images, causing students to have difficulty seeing the images of Chinese writing materials. Therefore, this embodiment provides a demonstration device for teaching Chinese writing in college. This device can easily scrape off the dust on the surface of the screen and collect and store the scraped dust to prevent dust from adhering to the screen and affecting subsequent teaching demonstrations.

[0025] See Figure 1 - Figure 5 This embodiment proposes a demonstration device for teaching Chinese writing in college, including a frame 1, a rewinding mechanism 2 inside the frame 1, and a cleaning mechanism 3 on the bottom surface of the frame 1.

[0026] refer to Figures 1 to 5 The winding mechanism 2 facilitates the winding and unfolding of the projection cloth 203, enabling the projection cloth 203 to work in conjunction with the projector to display images of Chinese writing teaching materials. The projector used with the projection cloth 203 is a known device disclosed in the prior art, and its setup can be performed according to the instructions in the accompanying manual, so it will not be described in detail.

[0027] The winding mechanism 2 includes a servo motor 202 mounted on the outer surface of the frame 1. The output shaft of the servo motor 202 rotates through the outer surface of the frame 1 and is fixedly connected to a winding roller 201. The outer end of the winding roller 201 is rotatably connected to the inner sidewall of the frame 1.

[0028] By setting up a servo motor 202, it is easy to drive the subsequent display components to retract and unfold, thereby enabling the display components to be used in conjunction with a projector to display images of Chinese writing materials.

[0029] As a supplement, by activating the servo motor 202, the output shaft of the servo motor 202 drives the take-up roller 201 to rotate, so that the take-up roller 201 drives the display component to be wound up or unwound when rotating forward or backward, thereby displaying Chinese writing in conjunction with the projector, which is convenient for teachers to give presentations.

[0030] The winding mechanism 2 also includes a projection cloth 203 wound around the outer surface of the winding roller 201 for projection, and a stop bar 204 fixed to the outer end of the projection cloth 203. The inner wall of the frame 1 is rotatably connected to a guide rod 205 for limiting the projection cloth 203.

[0031] By setting up the projection cloth 203, it is easy to use a projector to display images of Chinese writing materials, which makes it easier for teachers to give speeches. The setting of the baffle 204 makes it easy for the projection cloth 203 to be blocked by the baffle 204 when it is rolled up to the end, so as to prevent it from being completely rolled up into the inside of the frame 1.

[0032] As a supplement, by setting the guide rod 205, the projection cloth 203 can be easily guided and limited, thereby reducing the friction damage between the projection cloth 203 and the frame 1 when it is rolled up or unrolled, and greatly improving the service life of the projection cloth 203.

[0033] The cleaning mechanism 3 includes a cleaning frame 301 that is fixedly connected to a pre-reserved groove on the bottom surface of the frame 1, and a scraper 302 that is fixed to the inner wall of the cleaning frame 301 and used to scrape off dust. The cleaning mechanism 3 also includes a dust collection component connected to the cleaning frame 301 and a storage component connected to the dust collection component.

[0034] refer to Figures 1 to 5 The scraper 302 is designed to easily remove dust from the surface of the projection cloth 203 when it is rolled up. After the dust is scraped off, it will scatter and can be sucked up and collected by the dust collection component and transferred to the storage component for storage. Only the dust in the storage component needs to be cleaned periodically.

[0035] The vacuuming assembly also includes an L-shaped frame 303 fixed to the inner wall of the cleaning frame 301, and an air extraction head 305 connected to a pre-drilled hole on the outer surface of the L-shaped frame 303. The outer surface of the air extraction head 305 is provided with an air extraction hole 306 for sucking in dust.

[0036] By setting up a dust collection component, the L-shaped frame 303 inside the dust collection component can easily create a cavity between it and the cleaning frame 301, so that the subsequent driving component can extract the gas in the cavity, and then the suction head 305 can adsorb the projection cloth 203, ensuring that the projection cloth 203 can make stable contact with the scraper 302 and remove the dust.

[0037] As a supplement, the exhaust port 306 is designed so that the dust scraped off can be extracted through the exhaust port 306 during the suction process, due to the suction head 305 adsorbing the projection cloth 203, thus preventing the dust from flying around after being scraped off.

[0038] The vacuuming assembly also includes an air pump 304 mounted on the outer surface of the cleaning frame 301, and the connecting end of the air pump 304 passes through the outer surface of the cleaning frame 301 and communicates with the inner cavity of the cleaning frame 301.

[0039] By setting up a vacuuming component and an air pump 304 inside the vacuuming component, it is possible to easily extract air from the cavity between the L-shaped frame 303 and the cleaning frame 301, thereby facilitating the extraction of dust.

[0040] The storage component includes a collection frame 307 that is slidably connected to the bottom surface of the L-shaped frame 303, and the collection frame 307 is used to store dust.

[0041] By setting up a storage component and a collection box 307 within the storage component, dust sucked in by the air extraction hole 306 can be stored. This allows the dust to settle in the collection box 307 after the projection cloth 203 is rolled up, facilitating subsequent cleaning.

[0042] As a supplement, the size of the collection box 307 is adapted to the size of the cavity between the cleaning box 301 and the L-shaped box 303, thereby facilitating the storage of dust.

[0043] The storage component also includes a connecting strip 308 fixed to the outer surface of the collection frame 307, and the outer end of the connecting strip 308 slides through the inner sidewall of the cleaning frame 301 and is fixedly connected to a pull plate 309.

[0044] By setting up a storage component, and by setting up a connecting strip 308 and a pull plate 309 within the storage component, it is easy to pull the collection box 307 out of the cleaning box 301, thereby cleaning the dust inside the collection box 307.

[0045] As a supplement, the outer surface of the pull plate 309 is provided with anti-slip texture, which makes it easy to pull the connecting strip 308 and the collection frame 307 out of the cleaning frame 301. The pull plate 309 can also limit and block the connecting strip 308 to prevent the connecting strip 308 from entering the cavity of the cleaning frame 301 and becoming difficult to remove.

[0046] The bottom surface of the baffle 204 is fixedly connected with several connecting rings 4, and the upper surface of the frame 1 is fixedly connected with a mounting plate 5.

[0047] By setting the connecting ring 4, it is easy to connect the connecting ring 4 to the reserved connecting rod on the wall after the projection cloth 203 is unfolded, thereby preventing the projection cloth 203 from shaking due to the wind and avoiding the situation where students cannot see clearly due to the shaking of the projection cloth 203.

[0048] As a supplement, the mounting plate 5 allows the entire device to be installed on a predetermined wall surface at a suitable height as needed, and it needs to be compatible with the height of the projector so that the projector can project images of the Chinese writing materials.

[0049] Given the large size and high traffic volume in university classrooms, the projection cloth 203 is designed to be retractable. This allows the projection cloth 203 to be rolled up when not in use and unfolded as needed. At the same time, due to the high traffic volume, dust is more likely to adhere to the projection cloth 203, so it is necessary to install relevant dust removal components to remove dust from the projection cloth 203.

[0050] Working principle: During the demonstration of college Chinese writing instruction, the entire device is first installed on the wall at the predetermined position using the mounting plate 5, and then set up in conjunction with a projector. When displaying Chinese writing materials, the servo motor 202 is first started. The output shaft of the servo motor 202 drives the take-up roller 201 to rotate forward, causing the take-up roller 201 to unfold the projection cloth 203. After the projection cloth 203 is unfolded to a suitable length, the servo motor 202 is turned off, and the device is connected to the mounting rod pre-set on the wall through the connecting ring 4, thereby stabilizing the projection cloth 203. The projector is then started to project the image of the Chinese writing materials onto the projection cloth 203 for display.

[0051] After use, the servo motor 202 is started to rotate in reverse, causing the take-up roller 201 to rotate in reverse to take up the projection cloth 203. At the same time, the air pump 304 is started to draw air from the cleaning frame 301, causing the air extraction head 305 to suck up the projection cloth 203 and bring the projection cloth 203 into contact with the scraper 302. This allows the dust to be scraped off by the scraper 302 during the winding process of the projection cloth 203. Because the air extraction head 305 is blocked by the projection cloth 203, the scraped dust can be sucked in through the air extraction hole 306 and transferred to the collection frame 307 for storage.

Claims

1. A demonstration device for teaching Chinese writing in college, comprising a frame (1), characterized in that: The frame (1) is provided with a winding mechanism (2) inside, and a cleaning mechanism (3) is provided on the bottom surface of the frame (1). The cleaning mechanism (3) includes a cleaning frame (301) fixedly connected to a pre-reserved groove on the bottom surface of the frame (1), and a scraper (302) fixed to the inner wall of the cleaning frame (301) for scraping dust. The cleaning mechanism (3) also includes a dust collection component connected to the cleaning frame (301), and a storage component connected to the dust collection component. The dust collection component also includes an L-shaped frame (303) fixed to the inner wall of the cleaning frame (301) for... The vacuum assembly includes an air extraction head (305) connected to a pre-drilled hole on the outer surface of the L-shaped frame (303). The outer surface of the air extraction head (305) is provided with an air extraction hole (306) for sucking in dust. The vacuum assembly also includes an air pump (304) installed on the outer surface of the cleaning frame (301). The connecting end of the air pump (304) passes through the outer surface of the cleaning frame (301) and is connected to the inner cavity of the cleaning frame (301). The storage assembly includes a collection frame (307) slidably connected to the bottom surface of the L-shaped frame (303). The collection frame (307) is used for storing dust.

2. The demonstration device for college Chinese writing instruction according to claim 1, characterized in that: The winding mechanism (2) includes a servo motor (202) installed on the outer surface of the frame (1). The output shaft of the servo motor (202) rotates through the outer surface of the frame (1) and is fixedly connected to a winding roller (201). The outer end of the winding roller (201) is rotatably connected to the inner wall of the frame (1).

3. The demonstration device for college Chinese writing instruction according to claim 2, characterized in that: The winding mechanism (2) also includes a projection cloth (203) wrapped around the outer surface of the winding roller (201) for projection, and a stop bar (204) fixed to the outer end of the projection cloth (203). The inner wall of the frame (1) is rotatably connected to a guide rod (205) for limiting the projection cloth (203).

4. The demonstration device for college Chinese writing instruction according to claim 3, characterized in that: The storage component also includes a connecting strip (308) fixed to the outer surface of the collection frame (307), and the outer end of the connecting strip (308) slides through the inner sidewall of the cleaning frame (301) and is fixedly connected to a pull plate (309).

5. The demonstration device for college Chinese writing instruction according to claim 3, characterized in that: The bottom surface of the baffle (204) is fixedly connected with several connecting rings (4), and the upper surface of the frame (1) is fixedly connected with an mounting plate (5).

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