Doppler effect demonstrator

Abstract

The utility model discloses a Doppler effect demonstrator, and particularly relates to a teaching aid which is used for teaching and aims to help senior high school students to explore Doppler effect characteristics through visual experiment demonstration. The demonstrator comprises a main shell and a telescopic rod. The telescopic rod is arranged on the main shell in a sliding mode and can be pulled out of or stored in the main shell. Compared with the prior art, by means of the retractable rod capable of being stored, the space of a laboratory is saved, and portability and space efficiency of equipment are achieved.

Description

Technical Field

[0001] The utility model relates to the field of teaching tools, in particular to a demonstrator used for high school students to experimentally explore the characteristics of the Doppler effect. Background Art

[0002] The Doppler effect is a crucial concept in education, particularly physics, often requiring experimental demonstrations to deepen students' understanding. Existing Doppler effect demonstrators have several design and practical limitations. For example, storage and portability of teaching aids are crucial considerations in educational settings. Existing demonstrators are often bulky and difficult to store, taking up valuable lab space and hindering mobility between classrooms or locations. Utility Model Content

[0003] The purpose of the utility model is to provide a Doppler effect demonstrator, wherein the telescopic rod is symmetrically designed so as to be retractable and convenient for storage and carrying.

[0004] To achieve the above object, the utility model provides a Doppler effect demonstrator, comprising a main housing and a telescopic rod; the telescopic rod is slidably arranged on the main housing and can be pulled out of or stored in the main housing.

[0005] Furthermore, the telescopic rods are symmetrically arranged on both sides of the main shell, and the center of gravity is located in the middle of the Doppler effect demonstrator.

[0006] Furthermore, the telescopic rod includes a buzzer, a central axis of the telescopic rod and a tail end fixing piece. The buzzer is arranged at one end of the central axis of the telescopic rod, and the tail end fixing piece is arranged at an end away from the buzzer.

[0007] Furthermore, the buzzer is powered by a battery and controlled by a touch-sensitive switch.

[0008] Furthermore, a first protrusion is provided on one side of the tail end fixing piece, and first buckles are provided on both sides of the tail end fixing piece.

[0009] Furthermore, the main shell also includes an upper cover and a base, and the upper cover and the base are clamped to each other.

[0010] Furthermore, the upper cover is disc-shaped and has an opening on the side for the telescopic rod to pass through;

[0011] There are two parallel rail cabins with openings facing away from each other inside the upper cover; there are multiple rails on the rail cabin;

[0012] The track near the open end is provided with a first slope for preventing the telescopic rod from being completely pulled out;

[0013] On both sides of the orbital module away from the opening end, there are first card slots for clamping the tail end fixing piece;

[0014] On both sides of the orbital module near the opening end, there are second card slots for clamping the buzzer.

[0015] Furthermore, the interior of the base also includes a lower fixing plate, a flange coupling, a motor, a base housing, a gasket, and an inspection plate;

[0016] On the lower fixing plate, there are strip-shaped first grooves that are engaged with one end of the telescopic rod to fix the telescopic rod and prevent up-and-down vibration;

[0017] The motor is used to control the rotation speed of the buzzer at the end of the telescopic rod;

[0018] The gasket is arranged at the bottom of the base to prevent the base from sliding;

[0019] The inspection plate is located at the center of the base housing and is used to place the motor;

[0020] The flange coupling connects the lower fixing plate and the motor.

[0021] Furthermore, there is a power interface outside the base for connecting a regulator to control the rotation speed of the demonstrator; there is also a forward and reverse switch on the base for controlling the forward and reverse movement of the buzzer.

[0022] Furthermore, the base and the upper cover are made of ABS plastic.

[0023] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0024] The symmetrically designed telescopic rod can be pulled out from the main housing, enabling storage and facilitating storage and carrying.

[0025] Furthermore, the present utility model ensures that the center of gravity is located at the center, improving the stability of the demonstrator.

[0026] Furthermore, the design of the forward and reverse switch enables the demonstrator to flexibly control the rotation direction according to experimental needs.

[0027] Furthermore, the buzzer is designed for touch control, simplifying the operation process and facilitating the installation and replacement of the battery.

[0028] Furthermore, the main housing is set as a disc shape, solving the problem that the base design of the existing demonstrator may include acute angles or other sharp parts, which are likely to cut the operator's hand during use. Description of the Drawings

[0029] Figure 1 Schematic diagram of the telescopic rod of the Doppler effect demonstrator being pulled out

[0030] Figure 2 Schematic diagram of the telescopic rod of the Doppler effect demonstrator being retracted

[0031] Figure 3 Exploded view of the Doppler effect demonstrator

[0032] Figure 4 Schematic diagram of the structure of the telescopic rod in the Doppler effect demonstrator

[0033] Figure 5 Schematic diagram of the internal structure of the upper cover of the Doppler effect demonstrator

[0034] Figure 6 Schematic diagram of the internal structure of the base of the Doppler effect demonstrator

[0035] Wherein, 1. Telescopic rod; 11. Buzzer; 111. Battery module; 1111. Battery box seat; 1112. Battery box; 1113. Battery cover; 1114. First convex edge; 1115. Second protrusion; 112. Buzzer cover; 1121. Second convex edge; 113. Buzzer body; 114. Touch switch; 12. Central axis of the telescopic rod; 13. Tail end fixing part; 131. First protrusion; 132. First buckle; 133. Third convex edge; 2. Main housing; 21. Upper cover; 2101. Opening, 2102. Orbital module; 2103. Track; 2104. First gap; 2105. First ramp; 2106. First card slot, 2107. Second card slot; 2108. Flap; 2109. First small hole; 22. Base; 221. Lower fixing plate; 2211. First groove; 2212. Second small hole; 2213. Fourth small hole; 222. Flange coupling; 2221. Third small hole; 223. Motor; 224. Base housing; 225. Gasket; 226. Maintenance plate; 227. Power interface; 228. Forward and reverse switch Detailed implementation mode

[0036] The following will describe a Doppler effect demonstrator of the present invention in more detail with reference to the schematic diagrams, which show the preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation to the present invention

[0037] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not described in detail, because they would obscure the present utility model with unnecessary details. It should be recognized that in the development of any actual embodiment, numerous implementation details must be made to achieve the specific goals of the developer, such as changing from one embodiment to another in accordance with system-related or business-related constraints. Additionally, it should be recognized that such development work may be complex and time-consuming, but is only routine work for those skilled in the art.

[0038] In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present utility model will become clearer based on the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0039] As Figure 1 shown, the present utility model provides a Doppler effect demonstrator, including a main housing 2 and a telescopic rod 1; the telescopic rod 1 is slidably disposed on the main housing 2 and can be pulled out or retracted into the main housing 2.

[0040] Specifically, the main housing 2 is disc-shaped, and this design solves some safety hazards existing in the existing demonstrators. For example, the base 22 of the existing demonstrator may be designed with acute angles or other sharp parts, especially when it is necessary to quickly move or adjust the device in an emergency, it is easy to cut the operator's hand.

[0041] Furthermore, the telescopic rods 1 are symmetrically disposed on both sides of the main housing 2, and the center of gravity is located in the middle of the Doppler effect demonstrator, which is used to improve the stability of the demonstrator and the convenience of operation.

[0042] Furthermore, the telescopic rod 1 includes a buzzer 11, a telescopic rod central axis 12, and a tail end fixing member 13. The buzzer 11 is disposed at one end of the telescopic rod central axis 12, and the tail end fixing member 13 is disposed at the end of the telescopic rod central axis 12 away from the buzzer 11.

[0043] Furthermore, the buzzer 11 is powered by a battery and is controlled by a touch sensor switch.

[0044] Specifically, the buzzer 11 includes a buzzer cover 112, a battery module 111, a buzzer body 113 and a touch switch 114; the battery module 111 is composed of a battery box 1112, a battery cover 1113 and a battery box seat 1111; the buzzer body 113 is installed on one side of the battery module 111; wherein, one end of the battery box seat 1111 is provided with a first protrusion 1114, and one side of the battery box seat 1111 is provided with a second protrusion 1115, the buzzer cover 112 is just clamped on the edge of the second protrusion 1115, and the buzzer cover 112 is provided with a second protrusion 1115; the touch switch 114 is located on one side of the buzzer cover 112.

[0045] In one embodiment, a first protrusion 131 is provided on one side of the tail end fixing member 13; a third flange 133 is provided at one end of the tail end fixing member 13; and a plurality of first buckles 132 are provided on both sides away from the third flange 133 for clamping the main shell 2.

[0046] In one embodiment, the main housing 2 further includes an upper cover 21 and a base 22 , wherein the upper cover 21 and the base 22 are engaged with each other. The first buckle 132 is engaged with the upper cover 21 .

[0047] Furthermore, the upper cover 21 is disc-shaped and has an opening 2101 on its side for allowing the telescopic rod 1 to pass through.

[0048] There are two parallel track compartments 2102 with openings facing away from each other inside the upper cover 21; there are multiple tracks 2103 on the track compartment 2102, and there is a first gap 2104 between the tracks 2103; the track 2103 near the opening 2101 end is provided with a first slope 2105 that rises toward the opening 2101, which is used to cooperate with the opposite surface of the first protrusion 131 of the tail end fixing piece 13 to prevent the telescopic rod 1 from being completely pulled out.

[0049] The rail compartment 2102 is provided with first slots 2106 on both sides facing away from the outlet 2101 for engaging with the first buckles 132 on the tail end fixing member 13 when the telescopic rod 1 is stored.

[0050] The rail compartment 2102 is provided with second slots 2107 on both sides close to the opening 2101 for engaging with the first buckle 132 on the tail end fixing member 13 when the telescopic rod 1 is pulled out.

[0051] The first slot 2106 and the second slot 2107 are both used to prevent the telescopic rod 1 from sliding out of the track module 2102 .

[0052] Specifically, a plurality of baffles 2108 are arranged on the outer side in the direction perpendicular to the length direction of the orbital module 2102. There are a plurality of first small holes 2109 between the baffles 2108, which are used to fix the orbital module 2102 and clamp the base 22.

[0053] In one embodiment, the interior of the base 22 further includes a lower fixing plate 221, a flange coupling 222, a motor 223, a base housing 224, a gasket 225, and a maintenance plate 226.

[0054] A strip-shaped first groove 2211 is provided on the lower fixing plate 221. The first groove 2211 is clamped with one end of the telescopic rod 1 to limit the telescopic rod 1 and prevent it from vibrating up and down. The motor 223 is used to control the rotation speed of the buzzer 11 at the end of the telescopic rod 1. The gasket 225 is arranged at the bottom of the base 22 to prevent the base 22 from sliding. The maintenance plate 226 is located at the center of the bottom of the base housing 224 and is used to place the motor 223. The flange coupling 222 connects the lower fixing plate 221 and the motor 223, and there are a plurality of third small holes 2221 on the flange coupling 222.

[0055] Specifically, there are a plurality of second small holes 2212 on the lower fixing plate 221. The second small holes 2212 are connected to the first small holes 2109 of the upper cover 21 by screws. A plurality of fourth small holes 2213 are evenly arranged in the middle of the lower fixing plate 221.

[0056] In one embodiment, a power interface 227 is provided on the outside of the base 22, which is used to connect and control the motor 223 for demonstrating the rotation speed. A forward and reverse switch 228 is also provided on the base 22, which is used to control the forward and reverse movement of the buzzer 11.

[0057] In one embodiment, the base 22 and the upper cover 21 are made of ABS plastic.

[0058] In a preferred embodiment, the installer can install the Doppler effect demonstrator through the following steps:

[0059] S1: Installation of the telescopic rod 1 and the upper cover 21

[0060] Snap the third convex edge 133 of the tail end fixing member 13 onto one end of the central axis 12 of the telescopic rod; place the fixed tail end fixing member 13 and the central axis 12 of the telescopic rod into the track compartment 2102 of the upper cover, and the tail end fixing member 13 is away from the opening 2101 end. At this time, the first buckle 132 on the tail end fixing member 13 is snapped onto the first card slot 2106 of the upper cover 21; snap the end of the buzzer 11 away from the second protrusion 1115 onto the other end of the central axis 12 of the telescopic rod through the opening 2101 of the upper cover 21; at this time, a part of the second protrusion 1115 of the buzzer 11 extends beyond the length of the upper cover 21, which is convenient for the operator to pull out and store the telescopic rod 1.

[0061] S2: Installation of the tail end fixing member 13 and the lower fixing plate 221

[0062] Snap the first protrusion 131 on the tail end fixing member 13 into the first groove 2211 on the lower fixing plate 221, which can fix the telescopic rod 1 in the horizontal direction and prevent the telescopic rod 1 from vibrating up and down when being pulled out and stored.

[0063] S3: Installation of the flange coupling 222 and the lower fixing plate 221

[0064] A plurality of third small holes 2221 on the flange coupling 222 and a plurality of fourth small holes 2213 on the lower fixing plate 221 are fixed by screws.

[0065] S4: Installation of the base 22

[0066] Embed the inspection plate 226 in the middle of the base housing 224, snap the motor 223 onto the inspection plate 226, the flange coupling 222 is snapped onto the motor 223, the forward and reverse switch 228 for controlling the forward and reverse movement on the base housing 224 is connected to the motor 223 through a wire, and the power interface 227 is used to insert the jack of the external speed regulating device into the motor 223.

[0067] S5: Installation of the base 22 and the upper cover 21

[0068] Pass through the hole of the gasket 225 at the bottom of the placement base 22, and fix the first small hole 2109 on the upper cover 21 and the second small hole 2212 on the lower fixing plate 221 with screws. Finally, embed a plurality of gaskets 225 into the bottom of the base housing 224.

[0069] In the preferred embodiment, the usage process of the present utility model is as follows:

[0070] When studying the forward movement: Place the Doppler demonstrator flat above the table. First, pull out the two telescopic rods 1 from the main housing 2 at the same time. At this time, the horn of the buzzer 11 should face the operator. Then, by turning on the touch switch 114 on the telescopic rod 1, only turn on the buzzer 11 at one end to make it sound. After that, turn on the speed regulating device connected through the power interface 227 and adjust it to the required speed. When the motor 223 rotates, the flange coupling 222 drives the lower fixing plate 221 to drive the telescopic rod 1 to rotate clockwise under the drive of the motor 223. During the clockwise rotation of the buzzer 11, observe the change in the sound volume of the buzzer 11 by adjusting the rotation speed to conduct the Doppler effect experiment.

[0071] When studying the reverse movement: Place the Doppler demonstrator flat above the table. First, pull out the two telescopic rods 1 from the main housing 2 at the same time. At this time, the horn of the buzzer 11 should face the operator. Then, by turning on the touch switch 114 on the telescopic rod 1, only turn on the buzzer 11 at one end to make it sound. After that, turn on the forward and reverse switch 228 on the base 22 and turn on the switch of the speed regulating device connected through the power interface 227, and adjust it to the required speed. When the motor 223 rotates, the flange coupling 222 drives the lower fixing plate 221 to drive the telescopic rod 1 to rotate counterclockwise under the drive of the motor 223. During the counterclockwise rotation of the buzzer 11, observe the change in the sound volume of the buzzer 11 by adjusting the rotation speed to conduct the Doppler effect experiment.

[0072] In summary, in a Doppler effect demonstrator provided by an embodiment of the present invention, the telescopic rod 1 is symmetrically designed, which can be retracted, facilitating storage and carrying. At the same time, the center of gravity is ensured to be at the center, improving the stability of the Doppler demonstrator.

[0073] The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any person skilled in the art, within the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification and other changes to the technical solution and technical content disclosed in the present invention, all of which belong to the content within the scope of the technical solution of the present invention and still fall within the protection scope of the present invention.

Claims

1. A Doppler effect demonstrator, characterized in that, It includes a disc-shaped main housing and a telescopic rod; the telescopic rods are symmetrically arranged on both sides of the main housing, the center of gravity is located in the middle of the Doppler effect demonstrator, and it is slidably connected to the track through the track cabin in the main housing and can be pulled out or stored in the main housing; an opening for the telescopic rod to pass through is provided on the side of the main housing, and a slope for preventing the telescopic rod from being completely pulled out is provided at the opening end of the track cabin.

2. The Doppler effect demonstrator according to claim 1, characterized in that, The telescopic rod includes a buzzer, a central axis of the telescopic rod, and a tail-end fixing member. The buzzer is arranged at one end of the central axis of the telescopic rod, and the tail-end fixing member is arranged at the end of the central axis of the telescopic rod away from the buzzer.

3. The Doppler effect demonstrator according to claim 2, characterized in that, The buzzer is powered by a battery and controlled by a touch sensor switch.

4. The Doppler effect demonstrator according to claim 2, characterized in that, There is a first protrusion on one side of the tail-end fixing member, and first buckles are provided on both sides of the tail-end fixing member.

5. The Doppler effect demonstrator according to claim 1, characterized in that, The main housing further includes an upper cover and a base, and the upper cover and the base are snap-connected to each other.

6. The Doppler effect demonstrator according to claim 5, characterized in that, The upper cover is disc-shaped and has an opening on the side for the telescopic rod to pass through; There are two track cabins parallel to each other and with openings facing away from each other inside the upper cover; there are multiple tracks on the track cabin; the track near the opening end is provided with a first slope rising towards the opening for preventing the telescopic rod from being completely pulled out.

7. The Doppler effect demonstrator according to claim 2, wherein First clamping grooves are provided on both sides of the track cabin away from the opening end for clamping the tail-end fixing member; Second clamping grooves are provided on both sides of the track cabin near the opening end for clamping the buzzer.

8. The Doppler effect demonstrator according to claim 5, characterized in that, The base further includes a lower fixing plate, a flange coupling, a motor, a base housing, a gasket, and an inspection plate inside; A strip-shaped first groove is provided on the lower fixing plate, and the first groove is clamped with one end of the telescopic rod for limiting the telescopic rod to prevent up-and-down vibration; The motor is used to control the rotation speed of the buzzer at the end of the telescopic rod; The gasket is arranged at the bottom of the base for preventing the base from sliding; The inspection plate is located at the center of the base housing for placing the motor; The flange coupling connects the lower fixing plate and the motor.

9. The Doppler effect demonstrator according to claim 8, wherein, A power interface is provided outside the base for connecting a regulator for controlling the rotation speed of the demonstrator.

10. The Doppler effect demonstrator according to claim 8, characterized in that, A forward and reverse switch is further provided on the base for controlling the forward and reverse movement of the buzzer.

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