Sound vibration demonstration device

Abstract

The utility model relates to the technical field of teaching aids, in particular to a sound vibration demonstration device. Comprising a transparent tube body, a plurality of foam balls are arranged in the transparent tube body, a first sealing cover and a second sealing cover are arranged at the two ends of the transparent tube body respectively, an opening is formed in the first sealing cover, and a leakage net is arranged at the opening. The sound demonstration device provided by the utility model can carry out visual demonstration on sound vibration, is simple in structure and low in manufacturing cost, is convenient for teachers and students to carry out hand-held operation for observation, is easy to arouse the learning interest of the students, and is beneficial to the development of teaching work.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching aid technical field, especially is involved in a sound vibration demonstration device. BACKGROUND

[0002] In STEM education (science, technology, engineering and mathematics education), sound vibration is a very important component, and the sound vibration device is a kind of experimental teaching aid commonly used in physics teaching, which makes the medium in the pipe vibrate through the propagation of sound, thereby demonstrating sound vibration.

[0003] The sound vibration demonstration devices on the market at present can basically be divided into two categories:

[0004] One kind is self-made, usually uses PVC plastic, ping-pong ball, cotton thread and other simple materials to make, this kind usually designs simply, cannot be used repeatedly, is inconvenient to carry, precision and stability are difficult to guarantee, and demonstration effect is limited.

[0005] Another kind is a finished sound wave visualization device, mainly applied in the field of professional physics teaching instruments, and the design is more ingenious, but this kind of product is more expensive, and the volume is larger, cannot be handheld, and is not suitable for use in STEM teaching environment. Or use reflector, laser emission and other devices to convert the vibration of sound into visible light vibration, and this kind of product has higher requirements for operators in actual use, the principle is dry, difficult to attract students, and there are safety hazards, and it is not suitable for use in STEM teaching environment.

[0006] Therefore, the utility model is provided. CONTENT OF UTILITY MODEL

[0007] The utility model aims at providing a sound vibration demonstration device, which can visually demonstrate sound vibration, has simple structure, low manufacturing cost, is convenient for teachers and students to hold and operate for observation, easily arouses students' interest in learning, and is beneficial to the development of teaching work.

[0008] The utility model provides a sound vibration demonstration device, which comprises a transparent pipe body, a plurality of foam balls are arranged in the transparent pipe body, first sealing covers and second sealing covers are arranged at two ends of the transparent pipe body respectively, an opening is arranged on the first sealing cover, and a mesh screen is arranged at the opening.

[0009] Further, the mesh size of the mesh screen is smaller than the diameter of the foam ball.

[0010] Further, the material of the transparent pipe body is polyvinyl chloride, the inner diameter of the transparent pipe body is 27mm, the outer diameter is 30mm, and the length is 200mm.

[0011] Further, the mesh is made of metal, and has a diameter of 29mm and a thickness of 0.4mm; the mesh has a mesh number of 40 meshes and a wire diameter of 0.25mm.

[0012] Further, the foam balls are made of foamed polystyrene and have a white color and a diameter of 0.5-1mm.

[0013] Further, the space occupied by the plurality of foam balls is one third of the internal space of the transparent tube body.

[0014] Further, the first sealing cover and the second sealing cover are both made of ABS plastic, and both have an inner diameter of 30mm and an outer diameter of 32.8mm.

[0015] Further, the first sealing cover and the second sealing cover are respectively connected with the transparent tube body by stamping.

[0016] Further, the placing rack comprises a supporting bottom plate, two supporting seats are symmetrically arranged on the supporting bottom plate, a connecting plate is arranged on the supporting seat, and a placing ring is arranged on the top of the connecting plate.

[0017] Further, two limiting plates are symmetrically arranged at the bottom of the placing ring, and the top end of the connecting plate is located between the two limiting plates; the supporting seat comprises a mounting plate, two ear plates are symmetrically arranged on the top of the mounting plate, and the bottom end of the connecting plate is located between the two ear plates.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] Compared with the self-made sound vibration device, the technical scheme of the utility model improves the precision and safety by placing a plurality of foam balls in the transparent tube body and arranging sealing covers at both ends, has a simple structure, low manufacturing cost, is convenient for teachers and students to hold and operate, and only needs to hold the transparent tube body by hand when in use, so that the foam balls are uniformly distributed, the user makes a sound near the mesh by mouth or a loudspeaker, observes the change of the foam balls with the sound, experiences the visual effect of sound waves, easily arouses the learning interest of students, and is helpful for the development of teaching work. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0021] Figure 1It is a structure schematic view of the sound vibration demonstration device in the embodiment 1 of the utility model;

[0022] Figure 2 It is a real object effect view of the first sealing cover in the embodiment 1 of the utility model;

[0023] Figure 3 It is a real object effect view of the second sealing cover in the embodiment 1 of the utility model;

[0024] Figure 4 It is a real object effect view of the second sealing cover in the embodiment 1 of the utility model;

[0025] Figure 5 It is a demonstration effect view of the sound vibration demonstration device in the embodiment 1 of the utility model;

[0026] Figure 6 It is a structure schematic view of the placing rack in the embodiment 2 of the utility model;

[0027] Figure 7 It is a structure schematic view of the supporting bottom plate in the embodiment 2 of the utility model;

[0028] Figure 8 It is a structure schematic view of the supporting seat in the embodiment 2 of the utility model;

[0029] Figure 9 It is a structure schematic view of the connecting plate in the embodiment 2 of the utility model;

[0030] Figure 10 It is a structure schematic view of the placing ring in the embodiment 2 of the utility model;

[0031] Figure 11 It is an installation and use schematic view of the placing rack in the embodiment 2 of the utility model.

[0032] Mark 1-transparency pipe body;2-first sealing cover;3-second sealing cover;4-mesh;5-foam ball;6-supporting bottom plate;601-supporting leg;602-mounting hole;7-supporting seat;701-mounting plate;702-ear plate;703-first fixing hole;704-second fixing hole;8-connecting plate;801-first connecting hole;802-second connecting hole;9-placing ring;901-limiting plate;902-limiting hole;10-butterfly nut;11-wave washer;12-rivets. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be clearly and completely described below with reference to the embodiments, obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the present application.

[0034] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Embodiment 1

[0037] A sound vibration demonstration device, as shown in Figure 1 and Figure 2 , comprising a transparent pipe body 1, the two ends of the transparent pipe body 1 are respectively provided with a first sealing cover 2 and a second sealing cover 3, wherein the first sealing cover 2 is provided with an opening, and a mesh screen 4 is arranged at the opening, and a plurality of foam balls 5 are placed in the transparent pipe body 1. The mesh size of the mesh screen 4 is smaller than the diameter of the foam ball 5, so as to prevent the foam ball 5 from falling out of the mesh screen 4.

[0038] The transparent pipe body 1 is made of polyvinyl chloride (PVC), and the specific size is as follows: the inner diameter is 27mm, the outer diameter is 30mm, the wall thickness is 1.5mm, and the pipe length is 200mm.

[0039] The material of the foam ball 5 is foamed polystyrene (EPS foam), the color is white, and the shape is a spherical ball with a diameter of 0.5-1 mm. The foam ball 5 is loaded into the inside of the transparent tube body 1, and the space occupied by all the foam balls 5 is one third of the inside space of the transparent tube body 1, and the total weight of all the foam balls 5 is about 1 gram.

[0040] The structure of the first sealing cover 2 is shown in Figure 3 The structure of the second sealing cover 3 is shown in Figure 4 Both the first sealing cover 2 and the second sealing cover 3 are open mold injection parts, and the material is ABS material. The inner diameter of the first sealing cover 2 and the second sealing cover 3 is 30 mm, the outer diameter is 32.8 mm, and the wall thickness is 1.4 mm.

[0041] An opening is provided on the side wall opposite to the first sealing cover 2 and the second sealing cover 3, and a mesh 4 is fixed at the opening. The mesh 4 is made of metal material, and the shape is circular. The specific requirements are as follows: the diameter is 29 mm, the thickness is 0.4 mm, the mesh size is 40, and the wire diameter is 0.25 mm. Other sizes of the mesh 4 can also be used as long as it can prevent the foam balls 5 from falling out. The mesh 4 and the first sealing cover 2 are pressed by an ultrasonic pressing machine, and the connection between the first sealing cover 2, the second sealing cover 3 and the transparent tube body 1 is also pressed by an ultrasonic pressing machine. After ultrasonic stamping, the sealing performance is very good, and no foam balls 5 leak out. The entire device has a length of 204 mm and a diameter of 32.8 mm.

[0042] The use method of the sound vibration demonstration device provided in the embodiment is as follows: as shown in Figure 5 The transparent tube body 1 is placed horizontally when in use, so that the foam balls 5 are uniformly distributed inside the transparent tube body 1. The user blows into the mesh 4 or places the loudspeaker close to the mesh 4 to make sound, and observes the movement state of the foam balls 5 inside the transparent tube body 1. The user can hold the transparent tube body 1 by hand, or directly place the entire device on the desktop.

[0043] The sound vibration demonstration device in the embodiment is inspired by the Kundt tube. The Kundt tube is an instrument used by German scientist Kundt in 1866 to measure the speed of sound in gases or solids. Sound is a longitudinal wave. The device receives sound waves, generates incident sound waves, and transmits the incident sound waves along the middle tube. When the incident sound waves reach the other end, they are reflected to form reflected sound waves. The incident sound waves and the reflected sound waves superimpose each other to form a standing wave. Two simple harmonic waves with a period of T, a wavelength of λ, and an amplitude of A propagate in opposite directions along the X-axis. The wave propagating along the positive direction of the X-axis is called a right-going wave, and the wave equation is The wave propagating along the negative direction of the X-axis is called a left-going wave, and the standing wave equation is The combined standing wave equation is

[0044] The standing wave node is a point in the standing wave where the amplitude is zero, i.e., the point where y=0. When y = 0, we can get Where k = 0, 1, 2, 3…, the wave node is the point with the largest amplitude in the standing wave, that is The position of the maximum value of the standing wave, we can get Where n = 0, 1, 2, 3…, the energy of the standing wave reciprocates between adjacent nodes, and the change of the frequency of the sound wave causes the change of the amplitude of the standing wave. These factors together make the foam ball be able to float up and down in the transparent tube.

[0045] Embodiment 2

[0046] The technical scheme in the embodiment is basically the same as that in Embodiment 1, and the difference is that, as shown in Figure 6 The embodiment further comprises a placing rack, which facilitates placing on a desktop for use. The placing rack comprises a supporting bottom plate 6, two supporting seats 7 are arranged on the supporting bottom plate 6, a connecting plate 8 is arranged on the top of each supporting seat 7, and a placing ring 9 is arranged on the top of the connecting plate 8.

[0047] As shown in Figure 6 and Figure 7 The edges of the supporting bottom plate 6 are provided with a plurality of supporting legs 601, which support the supporting bottom plate 6. As shown in Figure 8 The supporting seat 7 comprises a mounting plate 701, two ear plates 702 are symmetrically fixed to the top of the mounting plate 701, a first fixing hole 703 for connecting with the connecting plate 8 is arranged on each ear plate 702, and a plurality of second fixing holes 704 for connecting with the supporting bottom plate 6 are arranged on the edges of the mounting plate 701. A plurality of circular mounting holes 602 are arranged on the supporting bottom plate 6, and the second fixing holes 704 are connected with the mounting holes 602 through rivets 12. The plurality of mounting holes 602 arranged on the supporting bottom plate 6 facilitate adjusting the distance between the two supporting seats 7.

[0048] As shown in Figure 9 The bottom end and the top end of the connecting plate 8 are respectively provided with a first connecting hole 801 and a second connecting hole 802, the first connecting hole 801 at the bottom end of the connecting plate 8 is connected with the first fixing hole 703 on the ear plate 702 through a bolt, the second connecting hole 802 at the top end of the connecting plate 8 is connected with the placing ring 9 through a bolt, and the nuts of the two bolts are butterfly nuts 10. During installation, the connecting plate 8 is located between the two ear plates 702, and a wave washer 11 is further arranged between the ear plate 702 and the butterfly nut 10. The first connecting hole 801 coincides with the first fixing hole 703 on the ear plate 702, and the sizes are the same.

[0049] As shown in Figure 10As shown, the placement ring 9 is C-shaped, two limiting plates 901 are fixed at the middle bottom of the placement ring 9, limiting holes 902 are arranged on the limiting plates 901, the top end of the connecting plate 8 is located between the two limiting plates 901 during installation, the limiting holes 902 are connected with the second connecting holes 802 by bolts, and the wave washer 11 is arranged between the limiting plates 901 and the wing nut 10.

[0050] The hole size of each part is slightly larger than the bolt diameter, facilitating the insertion of the bolt, the hole size of the wave washer 11 is slightly larger than the bolt diameter, the hole size of the wing nut 10 is the same as the bolt diameter, and the wing nut 10 is tightly contacted with the wave washer 11 after being tightened.

[0051] The inner walls of the two placement rings 9 are respectively fixed with anti-skid pads, the friction force is increased, and the first sealing cover 2 and the second sealing cover 3 or the transparent tube body 1 are kept stable.

[0052] When designing and manufacturing, the length of the limiting plate 901 of the placement ring 9 can be designed to be longer, a plurality of limiting holes 902 are arranged in the vertical direction, and the height of the placement ring 9 is adjusted.

[0053] The use method of the placement rack provided in the embodiment is as follows: when the sound vibration demonstration device needs to be placed on the desktop for use, as shown in the figure, Figure 11 the two ends of the transparent tube body 1 or the first sealing cover 2 and the second sealing cover 3 are respectively placed in the two placement rings 9, and the transparent tube body 1 is kept stable.

[0054] The placement rack provided in the embodiment can conveniently place the sound vibration demonstration device on the desktop for use, the placement ring can keep the device stable, and rolling is prevented.

[0055] The sealing cover of the transparent tube body of the sound vibration demonstration device is made by mold opening injection molding and sealed by ultrasonic stamping, so that the precision and safety of the device are greatly improved. In addition, the whole device has simple structure, low manufacturing cost and simple appearance design, and is made of a pipe body made of high-strength lightweight transparent material with appropriate length and size, which is convenient for teachers and students to hold and directly observe the change of the foam ball with sound, experiences the visual effect of sound wave, more easily attracts the learning interest of students, and is more suitable for use in STEM teaching environment, and is helpful for the development of teaching work.

[0056] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound vibration demonstration device, characterized in that, Includes a transparent tube (1), inside which are provided a plurality of foam balls (5), and at both ends of the transparent tube (1) are respectively provided a first sealing cap (2) and a second sealing cap (3), wherein the first sealing cap (2) is provided with an opening and a mesh (4) is provided at the opening; The mesh size of the sieve (4) is smaller than the diameter of the foam ball (5); It also includes a placement rack, which includes a support base plate (6), two support seats (7) are symmetrically arranged on the support base plate (6), a connecting plate (8) is provided on the support seat (7), and a placement ring (9) is provided on the top of the connecting plate (8); The placement ring (9) has two symmetrically arranged limiting plates (901) at its bottom, and the top of the connecting plate (8) is located between the two limiting plates (901); the support base (7) includes a mounting plate (701), and the top of the mounting plate (701) has two symmetrically arranged ear plates (702), and the bottom of the connecting plate (8) is located between the two ear plates (702); The edge of the mounting plate (701) is provided with a plurality of second fixing holes (704) for connecting with the support base plate (6). The support base plate (6) is provided with a plurality of circular mounting holes (602). The second fixing holes (704) and the mounting holes (602) are connected by rivets (12).

2. The sound vibration demonstration device according to claim 1, characterized in that, The transparent tube (1) is made of polyvinyl chloride, and its inner diameter is 27 mm, outer diameter is 30 mm, and length is 200 mm.

3. The sound vibration demonstration device according to claim 1, characterized in that, The mesh (4) is made of metal, and the mesh (4) has a diameter of 29 mm and a thickness of 0.4 mm; the mesh number of the mesh (4) is 40 mesh and the wire diameter is 0.25 mm.

4. The sound vibration demonstration device according to claim 1, characterized in that, The foam ball (5) is made of expanded polystyrene, is white in color, and has a diameter of 0.5-1mm.

5. The sound vibration demonstration device according to claim 1, characterized in that, The space occupied by the multiple foam balls (5) is one-third of the internal space of the transparent tube (1).

6. The sound vibration demonstration device according to claim 1, characterized in that, The first sealing cap (2) and the second sealing cap (3) are both made of ABS plastic, and both have an inner diameter of 30mm and an outer diameter of 32.8mm.

7. The sound vibration demonstration device according to claim 6, characterized in that, The first sealing cap (2) and the second sealing cap (3) are respectively stamped and connected to the transparent tube (1).

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