Sound transmission study teaching aid

Abstract

The utility model discloses a sound transmission study teaching aid, which relates to the technical field of teaching display devices, and comprises a base and two support plates symmetrically arranged above the base, the upper parts of the opposite sides of the two support plates are rotatably connected with a bidirectional threaded rod, the bidirectional threaded rod is sleeved with a sliding block, the sliding block is hinged with a connecting rod, and the connecting rod is fixedly connected with the base. The other end of the connecting rod is connected with a sound transmission cylinder, the lower end of the sound transmission cylinder is coated with a vibrating membrane, a reflective mirror is pasted on the vibrating membrane, an air exhaust hole is formed in the top end of the sound transmission cylinder, and a sound source is arranged in the sound transmission cylinder; a laser pen is arranged on one side of the upper portion of the base, a light source display mirror is arranged on the other side of the upper portion of the base, and the light source display mirror is horizontally arranged on the upper portion of the base in a sliding mode. According to the utility model, the structural design is novel, the vibration amplitude is better amplified by adjusting the height of the sound transmission cylinder, rotating the angle of the laser pen and rotating the position of the light source display mirror, the applicability is better, and the practicability is strong.

Description

Technical Field

[0001] This utility model relates to the field of teaching demonstration devices, specifically to a sound transmission research and teaching tool. Background Technology

[0002] Sound is a wave phenomenon produced by the vibration of objects. It propagates through a medium (air, solid, or liquid) and can be perceived by the auditory trachea of ​​humans or animals. Sound vibrations in air are invisible and difficult to observe directly with the naked eye. Therefore, when explaining the principle that sound propagates through vibration, teachers cannot provide a vivid demonstration to students. Students find the concept of sound propagation through vibration rather abstract, making it difficult for them to understand and master this knowledge.

[0003] To address the aforementioned issues, researchers have designed various educational tools for sound vibration propagation. For example, the existing patent CN1102328252A discloses a sound propagation demonstration tool. By tapping a rubber sheet without a round hole, the air inside the cylinder vibrates, causing the air outside to vibrate as well. The vibrating air transmits sound waves to the learner's ears, allowing the learner to intuitively experience the propagation of sound through their ears.

[0004] However, the above solutions cannot provide learners with a concrete and intuitive experience of the vibration propagation effect of sound, and are not very effective in helping learners understand the principle of sound vibration propagation.

[0005] Therefore, in response to the technical problems described above, the applicant, based on the principle of sound vibration propagation, researched and designed a sound propagation teaching aid. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the defects of the above-mentioned technology and provide a sound propagation research and teaching tool. The purpose is to convert the sound propagation vibration into the vibration of the diaphragm and the reflector through the diaphragm, and to reflect the light of the laser pen through the reflector to reflect the vibration onto the light source display mirror, thereby demonstrating that sound is propagated by vibration; making the sound vibration propagation concrete, which is convenient for learners to understand and learn.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a sound transmission research and teaching tool, including a base and two support plates symmetrically arranged above the base. A bidirectional threaded rod is rotatably connected to the upper part of one side of the two support plates. A slider is sleeved on the bidirectional threaded rod. A connecting rod is hinged to the slider. A sound tube is connected to the other end of the connecting rod. A vibrating diaphragm is covered at the lower end of the sound tube. A reflector is attached to the vibrating diaphragm. An air extraction hole is provided at the top of the sound tube. A sound source is provided inside the sound tube.

[0008] A laser pointer is provided on one side of the base, and a light source display mirror is provided on the other side of the base. The light source display mirror is horizontally slidably positioned above the base.

[0009] Furthermore, the sliders are arranged symmetrically in two, and each slider is provided with a threaded hole that is threaded to engage with the bidirectional threaded rod. The bidirectional threaded rod is provided with two threads with opposite directions of rotation from the middle to both ends. A handle is provided at one end of the bidirectional threaded rod. The bidirectional threaded rod drives the two sliders to slide in opposite or opposite directions along the axial direction by rotation.

[0010] Furthermore, each slider is hinged to a connecting rod, and there are two connecting rods arranged symmetrically. The microphone is hinged to the connecting rod through hinge holes arranged symmetrically at the upper end. The microphone moves up and down by two sliders that slide in opposite or opposite directions along the axial direction.

[0011] Furthermore, a laser pointer support frame is provided on one side above the base. The laser pointer support frame includes a vertical pole and a rotating rod located at the top of the vertical pole and rotatably connected to the vertical pole. A laser pointer mounting hole is provided at the end of the rotating rod away from the vertical pole. A laser pointer is installed in the laser pointer mounting hole, and the angle of the laser pointer is adjusted by rotating the rotating rod.

[0012] Furthermore, a sliding plate for placing a light source display mirror is provided on the other side above the base. A sliding rail is provided below the sliding plate along its length. A sliding groove that cooperates with the sliding rail is provided above the base along its length. Two sliding grooves are arranged symmetrically in the shape of long strips. Two sliding rails are arranged symmetrically. The sliding rails and sliding grooves are in sliding cooperation.

[0013] The advantages of this invention compared to existing technologies are as follows: This invention converts the air vibrations generated by sound propagation into diaphragm vibrations, and then uses a reflector to visually display these vibrations on a light source display mirror via reflected laser light. This visualizes the abstract principle of sound propagation through vibration, making it easier to learn and understand. Simultaneously, the air is extracted from the microphone tube through the vent, preventing sound from propagating to the diaphragm through air vibration, thus illustrating the principle that sound vibration propagation requires a medium, providing a more vivid demonstration of the sound vibration propagation principle to students. This invention also features a novel structural design. By adjusting the height of the microphone tube, the angle of the laser pointer, and the position of the light source display mirror, the vibration amplitude can be amplified more effectively, resulting in better applicability and greater practicality. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a sound transmission research and teaching tool according to this utility model.

[0015] Figure 2This is a cross-sectional view of a sound transmission teaching aid according to this utility model.

[0016] As shown in the figure: 1. Base, 1-1. Sliding groove, 1-2. Rotating threaded hole, 2. Support plate, 3. Two-way threaded rod, 3-1. Thread one, 3-2. Thread two, 3-3. Handle, 4. Slider, 5. Connecting rod, 6. Microphone, 6-1. Air extraction hole, 7. Vibrating diaphragm, 8. Reflector, 9. Sound source, 10. Laser pointer, 11. Light source display mirror, 12. Laser pointer support frame, 12-1. Upright pole, 12-2. Rotating rod, 12-3. Laser pointer mounting hole, 13. Sliding plate, 13-1. Threaded rod, 13-2. Rotating handle, 13-3. Groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0021] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Example 1:

[0023] Combined with appendix Figure 1 and 2 A sound transmission teaching aid includes a base 1 and two support plates 2 symmetrically arranged above the base 1. A bidirectional threaded rod 3 is rotatably connected to the upper part of one side of the two support plates 2. A slider 4 is sleeved on the bidirectional threaded rod 3. A connecting rod 5 is hinged to the slider 4. A sound tube 6 is connected to the other end of the connecting rod 5. A vibrating diaphragm 7 is covered at the lower end of the sound tube 6. A reflector 8 is attached to the vibrating diaphragm 7. An air extraction hole 6-1 is provided at the top of the sound tube 6. A sound source 9 is provided inside the sound tube 6.

[0024] A laser pointer 10 is provided on one side above the base 1, and a light source display mirror 11 is provided on the other side above the base 1. The light source display mirror 11 is horizontally slidably positioned above the base 1.

[0025] In practice, the sound source is electrically connected to an external source via wires. Once the sound source is activated, the sound travels through the air to the diaphragm, and the diaphragm's vibration causes the reflector to vibrate. Then, a laser pointer is activated to emit a laser beam, which is reflected by the reflector onto the light source display mirror, allowing the sound vibration propagation to be observed by the naked eye from the light spot on the light source display mirror.

[0026] The air extraction port is connected to an external air extraction device. By gradually reducing the air volume inside the microphone tube, the intensity of sound vibration propagation weakens, thus reducing the amplitude of the diaphragm's vibration. This reduction in diaphragm amplitude, in turn, reduces the amplitude of the reflector's vibration; consequently, the amplitude of the laser beam emitted by the laser pointer, after being reflected by the reflector, decreases on the light source display mirror. This illustrates the principle that sound vibration propagation requires a medium.

[0027] In a preferred embodiment, the sliders 4 are arranged in two symmetrical configurations. Each slider 4 has a threaded hole that engages with the bidirectional threaded rod 3. The bidirectional threaded rod 3 has two threads, 3-1 and 3-2, with opposite directions of rotation from the middle to both ends. One end of the bidirectional threaded rod 3 has a handle 3-3. The bidirectional threaded rod 3 rotates to drive the two sliders 4 to slide in opposite or axial directions. Each slider 4 is hinged to a connecting rod 5. There are two connecting rods 5 arranged symmetrically. The microphone 6 is hinged to the connecting rod 5 through symmetrically arranged hinge holes at its upper end. The microphone 6 is driven to move up and down by the two sliders 4 that slide in opposite or axial directions.

[0028] When the height of the transmission cylinder needs to be adjusted, manually rotate the handle to rotate the double-threaded rod. The rotation of the double-threaded rod causes the slider to slide in opposite directions, which in turn causes the two connecting rods to unfold and merge. The unfolding and merging of the connecting rods causes the microphone to rise and fall, thus achieving the technical effect of adjusting the height of the microphone.

[0029] In a preferred embodiment, a laser pointer support frame 12 is provided on one side above the base 1. The laser pointer support frame 12 includes a vertical rod 12-1 and a rotating rod 12-2 disposed at the top of the vertical rod 12-1 and rotatably connected to the vertical rod 12-1. A laser pointer mounting hole 12-3 is provided at the end of the rotating rod 12-2 away from the vertical rod 12-1. A laser pointer 10 is installed in the laser pointer mounting hole 12-3. The angle of the laser pointer 10 is adjusted by rotating the rotating rod 12-2.

[0030] In a preferred embodiment, a sliding plate 13 for placing a light source display mirror 11 is provided on the other side above the base 1. A sliding rail is provided below the sliding plate 13 along its length. A sliding groove 1-1 that cooperates with the sliding rail is provided above the base 1 along its length. Two sliding grooves 1-1 are arranged symmetrically in the shape of long strips. Two sliding rails are also arranged symmetrically. The sliding rails and sliding grooves 1-1 are slidably engaged.

[0031] The sliding plate 13 is rotatably connected to a threaded rod 13-1 at one end away from the support plate 2. One end of the base 1 has a rotating threaded hole 1-2 that mates with the threaded rod 13-1. The threaded rod 13-1 passes through the rotating threaded hole 1-2 and has a rotating handle 13-2. The threaded rod 13-1 rotates to drive the sliding plate 13 to slide left and right. A groove 13-3 is provided on the upper surface of the sliding plate 13, and a light source display mirror 11 is placed within the groove 13-3.

[0032] In practical implementation, this invention involves manually rotating the handle, which in turn rotates the threaded rod. The threaded rod, through its mating threaded hole, drags the sliding plate left and right along the sliding groove, achieving the technical effect of adjusting the position of the sliding plate and thus realizing the adjustment of the position of the light source display mirror.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sound-based educational teaching aid, characterized in that, The device includes a base and two support plates symmetrically arranged above the base. A bidirectional threaded rod is rotatably connected to the upper part of one side of the two support plates. A slider is sleeved on the bidirectional threaded rod. A connecting rod is hinged to the slider. A sound tube is connected to the other end of the connecting rod. A vibrating diaphragm is covered at the lower end of the sound tube. A reflector is attached to the vibrating diaphragm. An air extraction hole is provided at the top of the sound tube. A sound source is provided inside the sound tube. A laser pointer is provided on one side of the base, and a light source display mirror is provided on the other side of the base. The light source display mirror is horizontally slidably positioned above the base.

2. The sound transmission research and teaching aid according to claim 1, characterized in that, The sliders are arranged symmetrically in two, and each slider is provided with a threaded hole that is threaded to engage with the bidirectional threaded rod. The bidirectional threaded rod is provided with two threads with opposite directions of rotation from the middle to both ends. A handle is provided at one end of the bidirectional threaded rod. The bidirectional threaded rod drives the two sliders to slide in opposite or opposite directions along the axial direction by rotation.

3. The sound transmission research and teaching aid according to claim 2, characterized in that, Each slider is hinged to a connecting rod, and there are two connecting rods arranged symmetrically. The microphone is hinged to the connecting rod through hinge holes arranged symmetrically at the upper end.

4. The sound transmission research and teaching aid according to claim 3, characterized in that, A laser pointer support frame is provided on one side above the base. The laser pointer support frame includes a vertical pole and a rotating rod located at the top of the vertical pole and rotatably connected to the vertical pole. A laser pointer mounting hole is provided at the end of the rotating rod away from the vertical pole. A laser pointer is installed in the laser pointer mounting hole. The angle of the laser pointer is adjusted by rotating the rotating rod.

5. The sound transmission research and teaching aid according to claim 4, characterized in that, A sliding plate for placing a light source display mirror is provided on the other side above the base. A sliding rail is provided below the sliding plate along its length. A sliding groove that cooperates with the sliding rail is provided above the base along its length. Two sliding grooves are arranged symmetrically in the shape of long strips. Two sliding rails are arranged symmetrically. The sliding rails and sliding grooves are in sliding cooperation.

6. The sound propagation teaching aid according to claim 5, characterized in that, The sliding plate is rotatably connected to a threaded rod at one end away from the support plate. One end of the base is provided with a rotating threaded hole that mates with the threaded rod. After the threaded rod passes through the rotating threaded hole, a rotating handle is provided. The threaded rod drives the sliding plate to slide left and right by rotating.

7. The sound transmission teaching aid according to claim 6, characterized in that, The upper surface of the sliding plate is provided with a groove, and a light source display mirror is placed in the groove.

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