A color developing teaching aid

Abstract

The utility model relates to experimental apparatus technical field, and disclose a kind of color developing teaching aid, including branch, mounting piece and experimental flower, branch is made of support rod and connecting rod, and the opposite end of support rod and connecting rod is fixed, and the tail end of connecting rod is fixed in the front end of support rod, and the surface of support rod is smooth, and it is convenient for operator to hold support rod and operate experimental flower, mounting piece includes inner core, sleeve ring one and sleeve ring two, which are sequentially sleeved from inside to outside, connecting hole is formed on the axis of inner core, and connecting hole is movably sleeved in the side of connecting rod. By using multiple petals as the carrier of different pH solutions, and installing on the mounting piece, it presents a flower shape. By using the splashing method, the purple cabbage juice is splashed on the petals containing different pH solutions as the main anthocyanin, thereby generating a chemical reaction between the solution and the purple cabbage juice, presenting different colors, thereby effectively improving the students' interest in chemistry and the sense of participation and honor.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, specifically a color-developing teaching aid. Background Technology

[0002] Acid-base reactions are a fundamental concept in chemistry, widely applied in industry, environmental protection, medicine, and daily life. However, traditional teaching often focuses on abstract formulas and theoretical explanations, lacking intuitive experience, leading to some ambiguity in students' understanding of the theoretical concepts.

[0003] To enhance students' intuitive and clear understanding of the basic concepts of acid-base reactions in chemistry, the current practice of using individual experimental paper or blocks makes it difficult for students to understand the color differences between solutions with different pH values ​​and anthocyanins in purple cabbage. Furthermore, it fails to increase students' interest in chemistry, their sense of participation, and their sense of honor. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a color-developing teaching aid that enhances students' interest, participation, and sense of accomplishment in chemical acid-base reactions. It also allows for a clear understanding of the color differences that occur when different pH solutions are mixed with anthocyanins from purple cabbage. This solves the problem that using single experimental paper or blocks as carriers for acid-base reaction experiments makes it difficult to improve students' interest, participation, and sense of accomplishment in chemistry.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a color-developing teaching aid, comprising branches, mounting components, and experimental flowers. The branches are composed of support rods and connecting rods, with one end of the support rod and the other end of the connecting rod fixed. The front end of the support rod and the tail end of the connecting rod are fixed together. The surface of the support rod is smooth, making it easy for the operator to hold the support rod and manipulate the experimental flowers.

[0006] The mounting component includes an inner core, a first collar, and a second collar, which are sequentially fitted together from the inside out. A connecting hole is provided on the axis of the inner core. The connecting hole is movably fitted onto the side of the connecting rod. The diameter of the connecting hole matches the diameter of the side of the connecting rod. The connecting hole fits onto the side of the connecting rod, thus connecting the inner core and the connecting rod. At the same time, the diameter of the first collar matches the diameter of the side of the inner core, and the diameter of the second collar matches the diameter of the side of the collar. This allows the inner core, the first collar, and the second collar to be stably fitted together to form the entire mounting component.

[0007] The inner core, collar one, and collar two are provided with protrusions on their outer sides, and hook face plates are fixed on the sides of the protrusions.

[0008] The experimental flower consists of multiple petals. The tip of each petal is soaked in a liquid with a different pH value. The bottom of the petal has an installation groove, in which a rough-surface piece is fixed. The rough-surface piece is adhered to the hook-surface piece. The hook-surface piece and the rough-surface piece are two parts of the Velcro. By adhering the hook-surface piece to the rough-surface piece, the petal is fixed to the protrusions on the inner core, the first collar, and the second collar, thus presenting the entire experimental flower.

[0009] When using this color-developing teaching aid, multiple petals are soaked in solutions with different pH values. After soaking, they are dried. The dried petals, now containing the pH values, are then individually glued to the hook-shaped pieces on the side protrusions of the inner core, collar one, and collar two using the rough-faced pieces at their tail ends. Then, collar two, collar one, and the inner core are sequentially fitted together, so that the tail ends of the petals are secured in the stabilizing grooves, thus assembling the experimental flower. The device is then fixed to the tabletop by suction cups at the bottom of the support rod. At this point, the operator uses a spray bottle filled with purple cabbage juice to spray the liquid onto the petals. The purple cabbage juice reacts chemically with the petals containing solutions with different pH values, resulting in different colors.

[0010] As a further improvement to the above solution, a connecting ring is threaded to one end of the support rod, and a suction cup is fixed to the bottom of the connecting ring.

[0011] With the above technical solution, the suction cup is installed at the bottom of the support rod through the connecting ring. It is then attached to the tabletop by the suction cup, which facilitates the operator's stability in handling the experimental flowers and prevents them from tipping over.

[0012] As a further improvement to the above solution, the two ends of the connecting rod are respectively threaded with a lower limit ring and an upper limit ring.

[0013] The inner core has mating grooves at both ends and along the edges of the connecting holes, with the lower and upper limit rings fitting into the corresponding mating grooves.

[0014] With the above technical solution, when the inner core is fitted onto the side of the connecting rod, the bottom mating groove fits against the lower limit ring, and then the upper limit ring is threaded onto the side of the connecting rod and fits against the mating groove above the inner core, thereby achieving the function of fixing the inner core onto the connecting rod.

[0015] As a further improvement to the above solution, a protruding strip is provided on the side of the connecting rod, and a strip groove is opened in the connecting hole, with the protruding strip movably connected in the strip groove.

[0016] With the above technical solution, when the inner core is sleeved on the side of the connecting rod, the convex strip is movably connected in the strip groove, thereby improving the stability of the connection between the inner core and the connecting rod and preventing the inner core from rotating on the side of the connecting rod.

[0017] As a further improvement to the above scheme, multiple stabilizing grooves are distributed on the inner sides of collar one and collar two, and the stabilizing grooves are movably connected to the side of the protrusion.

[0018] Through the above technical solution, the stabilizing groove in the first collar is movably connected to the side of the protrusion on the inner core side, while the stabilizing groove in the second collar is movably connected to the side of the protrusion on one side of the collar, thus avoiding the phenomenon of rotation.

[0019] As a further improvement to the above solution, the back of the textured sheet is attached to the stabilizing groove.

[0020] Through the above technical solution, when the first collar is connected to the side of the inner core and the second collar is connected to the side of the collar, the petal tail end glued on the protrusion is clamped and fixed, so that the back of the rough surface piece is attached to the inner side of the stabilizing groove, and at the same time, the second collar is clamped between the first collar and the first collar, and the first collar is clamped between the inner core.

[0021] Compared with the prior art, this utility model provides a color-developing teaching aid with the following beneficial effects: 1. This color-developing teaching aid uses multiple flower petals as carriers for solutions of different pH values ​​and installs them on an installation device to present a flower shape. By using a splashing method, purple cabbage juice, as the main anthocyanin, is sprayed onto the petals containing solutions of different pH values. Through the chemical reaction between the solution and the purple cabbage juice, different colors are produced, thereby effectively improving students' interest in chemistry, their sense of participation, and their sense of honor.

[0022] 2. This color-developing teaching aid uses a ring and inner core design, and hook and fur-shaped pieces are installed on the ring, inner core and petals respectively, which facilitates the picking, soaking and subsequent reassembly of individual petals, effectively improving students' hands-on ability and operational safety. At the same time, after the experiment, a complete multi-colored flower with ornamental value can be obtained.

[0023] 3. This color-developing teaching aid features a detachable suction cup at the bottom of the support rod, allowing the experimental flower to stand vertically on the table. This facilitates manual operation by students and further enhances the safety of the teaching aid. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model; Figure 2 This is a schematic diagram of the connection structure between the branch and the mounting component of this utility model; Figure 3 This is a schematic diagram of the overall structure of the branches and trunk of this utility model; Figure 4 This is a schematic diagram of the overall structure of the mounting component of this utility model; Figure 5This is a schematic diagram of the overall structure of the petals of this utility model.

[0025] The attached diagram lists the components represented by each number as follows: 1. Branch; 101. Support rod; 102. Connecting rod; 103. Lower limit ring; 104. Upper limit ring; 105. Protrusion; 106. Connecting ring; 107. Suction cup; 2. Mounting components; 21. Inner core; 211. Connecting hole; 212. Butt groove; 213. Strip groove; 22. Collar one; 23. Collar two; 231. Protrusion; 232. Hook face plate; 233. Stabilizing groove; 3. Experimental flower; 301. Petal; 302. Mounting slot; 303. Textured surface. Detailed Implementation

[0026] 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. Example 1

[0027] Please see Figures 1-5 As shown, the color-developing teaching aid proposed in this embodiment includes a branch 1, an installation component 2, and an experimental flower 3. The branch 1 is composed of a support rod 101 and a connecting rod 102. The opposite ends of the support rod 101 and the connecting rod 102 are fixed. The front end of the support rod 101 and the tail end of the connecting rod 102 are fixed together. The surface of the support rod 101 is smooth, making it easy for the operator to hold the support rod 101 and operate the experimental flower.

[0028] Mounting component 2 includes an inner core 21, a first collar 22, and a second collar 23, which are sequentially fitted from the inside out. A connecting hole 211 is provided on the axis of the inner core 21. The connecting hole 211 is movably fitted onto the side of the connecting rod 102. The diameter of the connecting hole 211 matches the diameter of the side of the connecting rod 102. The connecting hole 211 fits onto the side of the connecting rod 102, thus connecting the inner core 21 to the connecting rod 102. At the same time, the diameter of the first collar 22 matches the diameter of the side of the inner core 21, and the diameter of the second collar 23 matches the diameter of the side of the first collar 22, so that the inner core 21, the first collar 22, and the second collar 23 can be stably fitted together to form the whole mounting component 2.

[0029] The inner core 21, the first collar 22 and the second collar 23 are provided with protrusions 231 distributed on the outer side, and hook face pieces 232 are fixed on the side of the protrusions 231.

[0030] The experimental flower 3 includes multiple petals 301. The tip of each petal 301 is soaked in a liquid with a different pH value. The bottom of the petal 301 has an installation groove 302. A rough surface piece 303 is fixed in the installation groove 302. The rough surface piece 303 is glued to the hook surface piece 232. The hook surface piece 232 and the rough surface piece 303 are two parts of the Velcro. By attaching the hook surface piece 232 to the rough surface piece 303, the petal 301 is fixed to the protrusion 231 on the side of the inner core 21, the first collar 22 and the second collar 23, thus presenting the experimental flower 3 as a whole.

[0031] It should be further explained that Petal 301 is specifically made of polyester fiber and wood pulp, which makes it easy to soak in solutions of different pH values ​​and absorb the solution.

[0032] The working principle of the color-developing teaching aid proposed in this embodiment is as follows: When in use, multiple petals 301 are soaked in solutions with different pH values. After soaking, they are dried. The dried petals 301 containing the pH values ​​are then attached one by one to the hook facets 232 on the side protrusions of the inner core 21, the first collar 22, and the second collar 23 through the rough facets 303 at the tail end. Then, the second collar 23, the first collar 22, and the inner core 21 are sequentially fitted together, so that the tail end of the petal 301 is locked in the stabilizing groove 233, thus assembling the experimental flower 3. The device is then fixed to the table by suction cup 107 at the bottom of the support rod 101. At this time, the operator uses a spray bottle containing purple cabbage juice to spray the purple cabbage liquid onto the petals 301. After the purple cabbage juice reacts chemically with the petals 301 containing solutions with different pH values, different colors are produced. Example 2

[0033] Please see Figures 1-5 As shown, the color-developing teaching aid proposed in this embodiment, based on the first embodiment, further includes a connecting ring 106 threadedly connected to one end of the support rod 101, and a suction cup 107 fixed at the bottom of the connecting ring 106.

[0034] More specifically, the suction cup 107 is installed at the bottom of the support rod 101 via the connecting ring 106. The suction cup 107 is attached to the tabletop, which facilitates the operator's stability in handling the experimental flowers and prevents them from tipping over.

[0035] Furthermore, the two ends of the connecting rod 102 are respectively threaded with a lower limit ring 103 and an upper limit ring 104.

[0036] The inner core 21 has mating grooves 212 at both ends and along the edge of the connecting hole 211, and the lower limit ring 103 and the upper limit ring 104 fit into the corresponding mating grooves 212.

[0037] More specifically, when the inner core 21 is fitted onto the side of the connecting rod 102, the bottom mating groove 212 fits against the lower limit ring 103, and then the upper limit ring 104 is threaded onto the side of the connecting rod 102 and fits against the mating groove 212 above the inner core 21, thereby achieving the function of fixing the inner core 21 onto the connecting rod 102.

[0038] Furthermore, the side of the connecting rod 102 is provided with a protrusion 105, and a strip groove 213 is opened in the connecting hole 211, with the protrusion 105 movably connected in the strip groove 213.

[0039] More specifically, when the inner core 21 is sleeved on the side of the connecting rod 102, the protrusion 105 is movably connected in the strip groove 213, thereby improving the stability of the connection between the inner core 21 and the connecting rod 102 and preventing the inner core 21 from rotating on the side of the connecting rod 102.

[0040] It should be further explained that multiple strip-shaped grooves 213 are equidistantly arranged in a vertical direction inside the connecting hole 211, and multiple protrusions 105 are equidistantly arranged in a vertical direction on the side of the connecting rod 102. The protrusions 105 match the shape and size of the strip-shaped grooves 213. The protrusions 105 are movably connected to the strip-shaped grooves 213, thereby restricting the inner core 21 from rotating on the side of the connecting rod 102.

[0041] Furthermore, multiple stabilizing grooves 233 are distributed on the inner sides of collar 22 and collar 23, and the stabilizing grooves 233 are movably connected to the side of protrusion 231.

[0042] More specifically, the stabilizing groove 233 inside the first collar 22 is movably connected to the side of the protrusion 231 on the side of the inner core 21, while the stabilizing groove 233 inside the second collar 23 is movably connected to the side of the protrusion 231 on the side of the first collar 22, thus preventing rotation.

[0043] Furthermore, the back of the rough surface 303 is attached to the stabilizing groove 233.

[0044] More specifically, when collar 22 is fitted onto the side of inner core 21 and collar 23 is fitted onto the side of collar 22, the tail end of the petal 301 bonded to the protrusion 231 is clamped and fixed, so that the back of the rough surface 303 is attached to the inside of the stabilizing groove 233, and at the same time, collar 23 is clamped between collar 22 and collar 22, and collar 22 is clamped between inner core 21.

[0045] The table below shows the pH values ​​of some common acidic or alkaline solutions, as well as the colors that appear after soaking and reacting with purple cabbage solution.

[0046]

[0047] 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 color-developing teaching aid, comprising branches (1), mounting components (2), and experimental flowers (3), characterized in that, The branch (1) is composed of a support rod (101) and a connecting rod (102), with one end of the support rod (101) and the connecting rod (102) fixed to the opposite side; The mounting component (2) includes an inner core (21), a first collar (22) and a second collar (23) that are sequentially sleeved from the inside to the outside. A connecting hole (211) is provided on the axis of the inner core (21), and the connecting hole (211) is movably sleeved on the side of the connecting rod (102). The inner core (21), collar one (22) and collar two (23) are provided with protrusions (231) distributed on the outer side, and hook face pieces (232) are fixed on the side of the protrusions (231). The experimental flower (3) includes multiple petals (301). The top of each petal (301) is soaked in a liquid with a different pH value. The bottom of the petal (301) is provided with an installation groove (302). A rough surface piece (303) is fixed in the installation groove (302) and the rough surface piece (303) is attached to the hook surface piece (232).

2. The color-developing teaching aid according to claim 1, characterized in that: One end of the support rod (101) is threaded to a connecting ring (106), and a suction cup (107) is fixed at the bottom of the connecting ring (106).

3. The color-developing teaching aid according to claim 1, characterized in that: The two ends of the connecting rod (102) are respectively threaded with a lower limit ring (103) and an upper limit ring (104). The inner core (21) has mating grooves (212) at both ends and along the edge of the connecting hole (211), and the lower limiting ring (103) and the upper limiting ring (104) fit into the corresponding mating grooves (212).

4. A color-developing teaching aid according to claim 3, characterized in that: The side of the connecting rod (102) is provided with a protrusion (105), and a strip groove (213) is opened in the connecting hole (211). The protrusion (105) is movably connected in the strip groove (213).

5. A color-developing teaching aid according to claim 1, characterized in that: Multiple stabilizing grooves (233) are provided on the inner sides of the first collar (22) and the second collar (23), and the stabilizing grooves (233) are movably connected to the side of the protrusion (231).

6. A color-developing teaching aid according to claim 1, characterized in that: The back of the textured sheet (303) is attached to the stabilizing groove (233).

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