Teaching aid for measuring relative vital capacity

Abstract

The utility model relates to the technical field of primary school science teaching demonstration, and discloses a teaching aid for measuring relative vital capacity, which comprises a straight vase, the outer surface of the straight vase is connected with a fixing support through hot melt adhesive in a sticking manner, and a mounting hole is formed in the fixing support. And a first group of plastic hoses are attached to the interiors of the mounting holes. According to the teaching aid for measuring the relative vital capacity, the water level of the water storage container is recovered, so that the device can be automatically and continuously used, the experiment efficiency is greatly improved, and due to the adoption of the structure, the device combines an air occupied space principle and a drainage method, and reduces the operation level by means of the one-way vent valve; the balloon is used for replacing a measuring bag to realize continuous measurement, and compared with devices of two versions, the device has high air tightness; the environmental protection principle is practiced; the data is visual; the device has the advantages of being high in scientificity from design to assembly and beneficial to cultivating the scientific thinking of students.

Description

Technical Field

[0001] This utility model relates to the field of primary school science teaching demonstration technology, specifically a teaching aid for measuring relative lung capacity. Background Technology

[0002] Current elementary school science textbooks include two types of experiments involving measuring lung capacity and analyzing the factors affecting it: one using a lung capacity measuring bag, straw, and paperclip, and the other using a graduated plastic bottle, water tank, disposable mouthpiece, rubber tubing, and bent straw. The experiment using a lung capacity measuring bag, straw, and paperclip involves students blowing air through the measuring bag using a breathing tube, and then reading the maximum value on the inflated bag. However, the plastic tube and the measuring bag don't seal well during blowing, increasing the difficulty of measurement. Furthermore, the bag's structure and operation make it difficult to completely tighten. Additionally, air is compressible, and the degree of tightness of the measuring bag affects the accuracy and reliability of the experimental data, increasing experimental error. The experiment used graduated plastic bottles, a water tank, disposable mouthpieces, rubber tubing, and bent straws: students filled plastic bottles with water and inverted them in the water tank, inserted bent straws, connected rubber tubing and disposable mouthpieces, and blew air into the bottles as much as possible. The amount of water expelled was recorded. However, due to the young age of the students and the weight of the full plastic bottles, students had difficulty inverting them. If the measuring container was not upright or the reading was not taken in time, it would affect the accuracy of the measurement. After each lung capacity measurement, the plastic bottle had to be refilled with water before the next measurement could be taken, which was cumbersome and time-consuming. When using the water displacement method, a large basin of water was required, which was extremely inconvenient in the classroom environment and could easily make the floor slippery.

[0003] Based on this, the present invention provides a teaching tool for measuring relative lung capacity. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a teaching aid for measuring relative lung capacity. It combines the principle of air occupying space with the water displacement method, reduces the operational level by using a one-way ventilation valve, and achieves continuous measurement by using a balloon instead of a measuring bag, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a teaching aid for measuring relative lung capacity, comprising a cylindrical vase, wherein a fixed bracket is attached to the outer surface of the cylindrical vase by hot melt adhesive, the fixed bracket has an installation hole inside, a first set of plastic tubing is fitted inside the installation hole, a disposable mouthpiece is inserted into one end of the first set of plastic tubing, a one-way ventilation valve is fixedly connected to the other end of the first set of plastic tubing, a second set of plastic tubing is inserted into the other end of the one-way ventilation valve, a first plastic through-plate elbow is fixedly connected to the side of the second set of plastic tubing, a third set of plastic tubing is fixedly connected to the side of the first plastic through-plate elbow, a second plastic through-plate elbow is fixedly connected to the side of the third set of plastic tubing, a fourth set of plastic tubing is fixedly connected to the top of the second plastic through-plate elbow, and a plastic through-plate straight connector is fixedly connected to the top of the fourth set of plastic tubing, the plastic through-plate straight connector securing a balloon with its own nut.

[0006] Preferably, the outer surface of the cylindrical vase is provided with a scale bar, and the scale bar is a milliliter scale value.

[0007] Preferably, the bottom of the cylindrical vase has a round hole, and a plastic through plate is attached to the inside of the round hole. The one-way ventilation valve is a one-way check valve, and the airflow direction is one-way from the disposable nozzle to the balloon.

[0008] Preferably, the interior of the cylindrical vase is used to fill water for experiments.

[0009] Preferably, the circular hole is located at the center of the lower surface of the cylindrical vase, and the diameter of the mounting hole is 1.3 cm.

[0010] Preferably, the diameter of the circular hole is 1.2 cm.

[0011] Preferably, the connection between the cylindrical vase and the plastic through-plate is sealed using a hot melt glue gun.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This teaching aid for measuring relative lung capacity combines the principle of air-occupying space with the water displacement method. By converting the amount of air occupied within the measuring bag into the volume of water displaced, the measurement is effectively reduced in difficulty. A one-way vent valve is used to further simplify the reading process. Since the gas displacement is converted into the water displacement volume, the scale on the measuring bag is converted into the scale of the water-holding device. Therefore, a balloon can be used instead of the measuring bag. Furthermore, when the one-way vent valve is pulled out, the air in the balloon is expelled, and the water level in the storage container is restored. This allows for automatic and continuous use, greatly improving experimental efficiency. Due to the above structure, this device combines the principle of air-occupying space with the water displacement method, reduces operational complexity with the one-way vent valve, and enables continuous measurement using a balloon instead of a measuring bag. Compared to the two previous versions, this device boasts superior airtightness, adherence to environmental principles, intuitive data, and a strong scientific design from design to assembly, contributing to the cultivation of students' scientific thinking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the water storage container and the air inlet / outlet pipe device of this utility model;

[0015] Figure 2 This is a schematic diagram of the gas storage device of the apparatus described in this utility model.

[0016] In the picture: 1. Disposable mouthpiece; 2. Plastic hose; 3. Fixing bracket; 4. One-way air valve; 5. First plastic through-plate elbow; 6. Scale strip; 7. Straight cylinder vase; 8. Balloon; 9. Plastic through-plate straight connector; 10. Second plastic through-plate elbow. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the textbook version of the fourth-grade elementary school science textbook, Unit 2 "Respiration and Digestion" Lesson 3 "Measuring Lung Capacity" and Unit 5 "Human Respiration and Digestion" Lesson 2 "Exercise and Respiration" in the Jiangsu Education Edition elementary school science textbook, both involve experiments on measuring lung capacity and analyzing the factors affecting it. The textbook version uses a lung capacity measuring bag, a straw, and a paperclip for the experiment. Students blow air into the measuring bag using a breathing tube and then read the maximum value on the inflated bag. However, during blowing, the plastic tube and the lung capacity measuring bag do not seal properly, increasing the difficulty of the measurement. Secondly, the bag's structure and operating characteristics make it difficult to completely tighten. Furthermore, air is compressible, and the degree of tightening of the measuring bag affects the accuracy and reliability of the experimental data. The Jiangsu Education Edition method for lung capacity measurement involves using graduated plastic bottles, water tanks, disposable mouthpieces, rubber tubing, and bent straws. Students fill the plastic bottles with water, invert them in the water tank, insert the bent straw, and connect the rubber tubing and disposable mouthpiece. They then blow air into the bottle and record the amount of water expelled. However, due to the young age of the students and the weight of the full plastic bottles, they have difficulty performing the inverted operation. If the measuring container is not upright or the reading is not taken in time, the accuracy of the measurement will be affected. After each lung capacity measurement, the plastic bottle must be refilled with water before the next measurement can be performed, which is cumbersome and time-consuming. When using the water displacement method, a large basin of water is required, which is extremely inconvenient in the classroom environment and can easily make the floor slippery.

[0020] Please see Figure 1-2A teaching aid for measuring relative lung capacity includes a cylindrical vase 7. A fixing bracket 3 is attached to the outer surface of the vase 7 using hot melt adhesive. The fixing bracket 3 has mounting holes inside, and a first set of plastic hoses 2 is fitted inside the mounting holes. A disposable mouthpiece 1 is inserted into one end of the first set of plastic hoses 2, and a one-way ventilation valve 4 is fixedly connected to the other end of the first set of plastic hoses 2. A second set of plastic hoses 2 is inserted into the other end of the one-way ventilation valve 4. A first plastic through-plate elbow 5 is fixedly connected to the side of the second set of plastic hoses 2. A third set of plastic hoses 2 is fixedly connected to the side of the first plastic through-plate elbow 5. A second plastic through-plate elbow 10 is fixedly connected to the side of the third set of plastic hoses 2. Two plastic through-plate elbows 10 are fixedly connected to the top of a fourth set of plastic hoses 2. The top of the fourth set of plastic hoses 2 is fixedly connected to a plastic through-plate straight connector 9. The plastic through-plate straight connector 9 secures a balloon 8 with its own nut. Multiple disposable mouthpieces 1 are submerged in clean water for later use. Simultaneously, an appropriate amount of water is poured into a straight-sided vase 7, and the initial water level in the vase 7 is recorded. The subject takes a deep breath and exhales completely through the disposable mouthpieces 1. As the balloon 8 fills with exhaled air, the space occupied by water in the vase 7 is filled, and the water level rises. The final water level in the vase 7 is recorded, and the difference between the two water levels is calculated. This difference represents the subject's lung capacity. At this time, the lung capacity is equal to the volume of exhaled air equal to the volume of water rising in the container. Pull out the one-way ventilation valve 4 to expel the air from the balloon 8. After the water level returns to normal, reinstall the one-way ventilation valve 4 and repeat the previous step. Perform three measurements on each subject and take the average. Remove the current disposable mouthpiece 1 and replace it with a new, clean disposable mouthpiece 1 inserted into the first set of plastic tubing 2 to measure the lung capacity of the next subject. Analyze the factors affecting lung capacity based on experimental data. Combine the principle of air-occupied space with the water displacement method. By converting the amount of air occupied in the measuring bag into the amount of water displaced, the operational difficulty is effectively reduced. This device uses a one-way ventilation valve to reduce... The device reduces the difficulty of reading measurements. Since the gas discharge volume is converted into the water displacement volume, the graduations on the measuring bag are converted into graduations on the water-holding device. Therefore, a balloon can be used instead of a measuring bag. Furthermore, when the one-way vent valve is pulled out, the air inside the balloon is expelled, and the water level in the storage container is restored. This allows the device to be used automatically and continuously, greatly improving experimental efficiency. Due to the above structure, this device combines the principle of air occupying space with the water displacement method, reduces the level of operation with the help of the one-way vent valve, and achieves continuous measurement by replacing the measuring bag with a balloon. Compared with the two versions of the device, this device has the advantages of strong airtightness, adherence to environmental protection principles, intuitive data, and strong scientific design and assembly, which helps to cultivate students' scientific thinking.

[0021] The cylindrical vase 7 has a graduated strip 6 on its outer surface, with milliliter graduations. After placing the cylindrical vase 7 horizontally, use transparent tape to vertically fix a cut A4 sheet of paper to the outer wall of the container. Fill a 500ml beaker with water and pour it into the container. Mark the amount of water poured in with a marker each time. After pouring in 5000ml of water, use a 100ml beaker to continue adding water. Every five marks, extend the marking line to twice its original length, up to 9000ml. Mark the corresponding quantity and unit on each extended marking line: 500ml, 1000ml, 1500ml...9000ml, until the highest marking line. Finally, seal the marked measurement scale with transparent tape.

[0022] The bottom of the straight-sided vase 7 has a round hole, and a plastic through-plate 9 is attached to the inside of the round hole. Add an appropriate amount of water to the straight-sided vase 7, let it stand for 10 minutes, and observe whether there is any water leakage at the interface between the straight-sided vase 7 and the plastic through-plate 9.

[0023] The interior of the straight-sided vase 7 is used to inject water for experiments, and the one-way ventilation valve 4 is a one-way check valve. The airflow direction is one-way from the disposable nozzle 1 to the balloon 8.

[0024] The round hole is located at the center of the lower surface of the cylindrical vase 7, and the diameter of the mounting hole is 1.3cm.

[0025] The diameter of the circular hole is 1.2 cm.

[0026] The connection between the straight-cylinder vase 7 and the plastic through-plate straight-through 9 is sealed with a hot melt glue gun.

[0027] The working principle is as follows: Multiple disposable mouthpieces 1 are immersed in clean water for later use. Simultaneously, an appropriate amount of water is poured into a cylindrical vase 7, and the initial water level is recorded. The subject takes a deep breath and exhales completely through the disposable mouthpiece 1. As the balloon 8 fills with exhaled air, the space occupied by water in the cylindrical vase 7 is filled, and the water level rises. The final water level in the cylindrical vase 7 is recorded, and the difference between the two water levels is calculated. This difference represents the subject's lung capacity. At this point, the lung capacity equals the volume of exhaled air equal to the volume of water rising in the container. The one-way valve 4 is then removed to expel the air from the balloon 8. After the water level returns to normal, the one-way valve 4 is reinstalled, and the previous step is repeated. Three measurements are taken for each subject, and the average value is recorded. The current disposable mouthpiece 1 is removed, and a new, clean disposable mouthpiece 1 is inserted into the first set of plastic tubing 2 to measure the lung capacity of the next subject. The factors affecting lung capacity are analyzed based on the experimental data.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A teaching aid for measuring relative lung capacity, characterized in that, The vase includes a cylindrical vase (7). A fixing bracket (3) is attached to the outer surface of the cylindrical vase (7) using hot melt adhesive. The fixing bracket (3) has an internal mounting hole. A first set of plastic hoses (2) is fitted inside the mounting hole. One end of the first set of plastic hoses (2) is connected to a disposable nozzle (1). The other end of the first set of plastic hoses (2) is fixedly connected to a one-way ventilation valve (4). The other end of the one-way ventilation valve (4) is connected to a second set of plastic hoses (2). The first plastic through-plate elbow (5) is fixedly connected to the side of the first plastic through-plate elbow (5), the third set of plastic hoses (2) is fixedly connected to the side of the first plastic through-plate elbow (5), the second plastic through-plate elbow (10) is fixedly connected to the side of the third set of plastic hoses (2), the fourth set of plastic hoses (2) is fixedly connected to the top of the second plastic through-plate elbow (10), and the plastic through-plate straight connector (9) is fixedly connected to the top of the fourth set of plastic hoses (2). The plastic through-plate straight connector (9) fixes the balloon (8) with its own nut.

2. The teaching aid for measuring relative vital capacity according to claim 1, characterized in that: The outer surface of the cylindrical vase (7) is provided with a scale bar (6), which is a milliliter scale value.

3. The teaching aid for measuring relative vital capacity according to claim 1, characterized in that: The bottom of the cylindrical vase (7) has a round hole, and a plastic through-plate (9) is attached to the inside of the round hole. The one-way ventilation valve (4) is a one-way check valve, and the airflow direction is one-way from the disposable nozzle (1) to the balloon (8).

4. The teaching aid for measuring relative vital capacity according to claim 1, characterized in that: The interior of the straight-sided vase (7) is used to inject water for experiments, and the diameter of the mounting hole is 1.3 cm.

5. The teaching aid for measuring relative lung capacity according to claim 3, characterized in that: The circular hole is located at the center of the lower surface of the cylindrical vase (7).

6. The teaching aid for measuring relative vital capacity according to claim 3, characterized in that: The diameter of the circular hole is 1.2 cm.

7. The teaching aid for measuring relative vital capacity according to claim 3, characterized in that: The connection between the straight-tube vase (7) and the plastic through-plate straight connector (9) is sealed with a hot melt glue gun.

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