Telescopic multifunctional megaphone

Abstract

The utility model relates to the technical field of megaphones, and especially relates to a telescopic multifunctional megaphone comprising a storage mechanism which is independently and fixedly arranged; the supporting column is arranged on the storage mechanism, and a threaded groove is formed in the supporting column in the length direction; the moving part is arranged on the supporting column, and the moving part is slidably mounted in the length direction of the supporting column; the mounting part is arranged on the moving part, a mounting column group is arranged on the mounting part, and a bolt is arranged at the end part of the mounting column group; the megaphone body is arranged on the mounting column group and is fixed through a bolt; the power mechanism is arranged on the mounting part and is used for performing telescopic adjustment on the position of the megaphone body; the driving mechanism is arranged on the storage mechanism and used for adjusting the megaphone direction of the megaphone body; the communication efficiency and the use convenience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of megaphones, in particular to a telescopic multi-functional megaphone. Background Art

[0002] In various occasions such as daily life, emergency rescue, and public activities, megaphones, as an important communication tool, are widely used in information transmission, command and dispatch, etc. However, traditional megaphones have many inconveniences during use.

[0003] Firstly, the height of traditional megaphones is often fixed and cannot be flexibly adjusted according to actual needs. In crowded places or when information needs to be transmitted over a long distance, the fixed height of the megaphone may not ensure the effective transmission of sound, thus affecting the communication effect.

[0004] Secondly, the direction adjustment of traditional megaphones is also relatively limited. When information needs to be transmitted in a specific direction, users often need to manually adjust the angle of the megaphone, which is not only cumbersome to operate but may also affect the information transmission efficiency due to inaccurate angle adjustment.

[0005] In summary, due to the many deficiencies of megaphones in the prior art in terms of height adjustment and direction adjustment, they cannot meet the increasingly diverse usage requirements. Therefore, there is an urgent need for a new type of megaphone that can solve the above problems to improve communication efficiency and usage convenience. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model provides a telescopic multi-functional megaphone that improves communication efficiency and usage convenience.

[0007] The telescopic multi-functional megaphone of the utility model includes:

[0008] A storage mechanism, which is independently and fixedly arranged;

[0009] A support column, which is arranged on the storage mechanism, and a threaded groove is arranged along the length direction of the support column;

[0010] A moving part, which is arranged on the support column, and the moving part is slidably installed along the length direction of the support column;

[0011] An installation part, which is arranged on the moving part, an installation column group is arranged on the installation part, and bolts are arranged at the ends of the installation column group;

[0012] A megaphone body, which is arranged on the installation column group and is fixed by bolts;

[0013] A power mechanism, which is arranged on the installation part and is used for telescopic adjustment of the position of the megaphone body;

[0014] The driving mechanism is arranged on the storage mechanism and is used to adjust the shouting direction of the megaphone body.

[0015] Furthermore, the power mechanism includes:

[0016] The mounting shaft is rotatably arranged in the connecting hole of the mounting part, and a threaded column is coaxially arranged on the mounting shaft. The threaded column is fitted and installed with the threaded groove on the support column;

[0017] The servo motor is arranged on the mounting part, and the output end of the servo motor is installed with the mounting shaft.

[0018] Preferably, the storage mechanism includes:

[0019] The storage box is internally provided with a cavity, and a notch is provided at the top;

[0020] The sealing cover is arranged on the moving part. The sealing cover is snap-connected with the notch of the storage box. An inner hole is provided on the sealing cover, and the support column is slidably installed with the inner hole of the sealing cover;

[0021] The storage battery is arranged inside the storage box and is used to provide power supply for the power mechanism and the driving mechanism.

[0022] Furthermore, a mounting seat is provided at the bottom end of the storage box, and a plurality of fixing holes are provided on the mounting seat.

[0023] Preferably, the driving mechanism includes:

[0024] The support shaft is rotatably arranged inside the storage box, and the support shaft is coaxially installed with the notch of the storage box. The support column is coaxially arranged on the support shaft;

[0025] The transmission gear is coaxially arranged on the support shaft;

[0026] The straight rack is provided with a shaft hole and a guide groove, and the straight rack is meshed and connected with the transmission gear;

[0027] The conduction mechanism is arranged inside the storage box, and the straight rack is arranged on the conduction mechanism and is used to provide a reciprocating displacement movement of the straight rack relative to the transmission gear;

[0028] The limiting mechanism is arranged on the conduction mechanism, and the straight rack is connected with the limiting mechanism and is used to limit the movement track of the straight rack.

[0029] Furthermore, the maximum swing spacing of the straight rack meshes with the transmission gear to drive the support shaft to rotate 360°.

[0030] Preferably, the conduction mechanism includes:

[0031] The fixing part is arranged inside the storage box;

[0032] Two transmission shafts are rotatably arranged on the fixing member and the limiting mechanism respectively, a connecting gear is arranged on the transmission shaft, and the connecting gear is eccentrically arranged, the two connecting gears are meshed and transmission-connected, the transmission shaft arranged on the limiting mechanism is rotatably arranged inside the spur rack shaft hole, and the transmission shaft arranged on the fixing member is slidably arranged inside the spur rack guide groove;

[0033] An auxiliary part, wherein the two connecting gears are rotatably arranged in two positioning holes of the auxiliary part, so as to ensure stable meshing of the two connecting gears;

[0034] The driving motor is arranged on the fixing member, and the output end of the driving motor is connected to the conducting shaft arranged on the fixing member.

[0035] Furthermore, the limiting mechanism includes:

[0036] A positioning slide rail is arranged on the fixing member, and a guide groove is arranged on the positioning slide rail;

[0037] The limiting member is arranged on the positioning slide rail and is slidably installed along the length direction of the positioning slide rail. The assembling hole of the limiting member is rotatably arranged on a conduction shaft.

[0038] A retractable multifunctional megaphone is designed: The retractable multifunctional megaphone of the utility model realizes the multifunctional characteristics of high telescopicity, direction adjustment and rapid installation and disassembly through the coordinated work of the storage mechanism, support column, moving parts, mounting parts, megaphone body, power mechanism and driving mechanism, meeting the use requirements in different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the retractable multifunctional megaphone in the utility model at a first angle;

[0040] Figure 2 It is a schematic diagram of the structure of the retractable multifunctional megaphone in the utility model after omitting the sealing cover;

[0041] Figure 3 This is a schematic diagram of the structure of the retractable multifunctional megaphone in the utility model after the storage box is omitted;

[0042] Figure 4 This is a schematic diagram of the mounting column structure of the retractable multifunctional megaphone in the utility model;

[0043] Figure 5 It is a schematic diagram of the conduction mechanism structure of the retractable multifunctional megaphone in the utility model;

[0044] Figure 6 It is a schematic diagram of the explosion structure of the conducting mechanism of the retractable multifunctional megaphone in the utility model;

[0045] Reference numerals in the drawings: 1, storage mechanism; 11, storage box; 11a, mounting base; 12, sealing cover; 13, storage battery; 2, support column; 3, moving member; 4, mounting member; 5, mounting column group; 6, megaphone body; 7, power mechanism; 71, mounting shaft; 72, threaded column; 73, servo motor; 8, drive mechanism; 81, support shaft; 82, transmission gear; 83, straight rack; 84, conduction mechanism; 84a, fixing member; 84b, conduction shaft; 84c, connecting gear; 84d, drive motor; 84e, auxiliary member; 85, limiting mechanism; 85a, positioning slide rail; 85b, limiting member. Detailed implementation manners

[0046] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0047] The present utility model relates to a telescopic multifunctional megaphone, as Figures 1 to 6 shown, including:

[0048] A storage mechanism 1, independently and fixedly arranged, made of high-strength materials, having sufficient structural strength to support the entire device;

[0049] A support column 2, arranged on the storage mechanism 1, one end of the support column 2 is fixedly connected to the inside of the storage mechanism 1, the other end extends upward, and the support column 2 is provided with a threaded groove along its length direction;

[0050] A moving member 3, arranged on the support column 2, and the moving member 3 is slidably installed along the length direction of the support column 2;

[0051] A mounting member 4, arranged on the moving member 3, the mounting member 4 is provided with a mounting column group 5, and the end of the mounting column group 5 is provided with a bolt. The mounting column group 5 is provided with a plurality of fixed columns to adapt to different models of megaphones and facilitate the quick loading and unloading of various specifications of megaphones;

[0052] A megaphone body 6, selecting a common portable megaphone on the market, arranged on the mounting column group 5 and fixed by bolts;

[0053] A power mechanism 7, arranged on the mounting member 4, used for telescopic adjustment of the position of the megaphone body 6;

[0054] A drive mechanism 8, arranged on the storage mechanism 1, the support column 2 is arranged on the drive mechanism 8, used for adjusting the shouting direction of the megaphone body 6;

[0055] The telescopic multifunctional megaphone of the present utility model realizes the functions of height telescoping, direction adjustment, and quick installation and disassembly of the megaphone through the ingeniously designed various mechanisms. The specific working principle is as follows:

[0056] Height adjustment:

[0057] The moving member 3 is slidably mounted on the support column 2 and can slide up and down along the length direction of the support column 2. The power mechanism 7 is connected to the moving member 3, and through the driving mechanism, the moving member 3 can achieve precise lifting movement on the support column 2, thereby adjusting the height of the megaphone body 6 to meet the usage requirements in different scenarios;

[0058] Direction adjustment: The driving mechanism 8 is arranged on the storage mechanism 1 and is connected to the support column 2. Through rotational movement, the direction adjustment of the megaphone body 6 in the horizontal plane is realized. Users can adjust the orientation of the megaphone by operating the driving mechanism 8 according to actual needs to ensure that the sound can be accurately and efficiently transmitted to the target area;

[0059] The retractable multi-functional megaphone of the present utility model realizes the multi-functional characteristics of height telescoping, direction adjustment, and quick installation and disassembly through the coordinated work of the storage mechanism, support column, moving member, mounting member, megaphone body, power mechanism, and driving mechanism, meeting the usage requirements in different scenarios.

[0060] Traditional height adjustment mechanisms can be realized by using existing technologies such as manual screw jacks or ordinary electric lifting columns. However, these existing technologies can only achieve simple height adjustment functions and usually have problems such as low adjustment accuracy, cumbersome operation, or insufficient stability. In this device, high-precision, stable, and remotely controllable height adjustment is required to meet the usage requirements in different complex environments and solve the problem of poor sound propagation effect caused by improper height adjustment in traditional technologies. To solve the above problems, a more optimized power mechanism 7 is designed in this device, as Figures 1 to 4 shown, including:

[0061] The mounting shaft 71 is rotatably arranged in the connection hole of the mounting member 4, having high wear resistance and torsional resistance. A threaded column 72 is coaxially arranged on the mounting shaft 71, and the threaded column 72 is fitted and installed with the threaded groove on the support column 2. When the mounting shaft 71 rotates, the threaded column 72 will interact with the threaded groove on the support column 2, thereby pushing the moving member 3 to perform a linear motion along the length direction of the support column 2;

[0062] The servo motor 73 is arranged on the mounting member 4. The servo motor 73 is a small motor that can receive signals from the controller and start precisely according to them, and the output end of the servo motor 73 is installed with the mounting shaft 71;

[0063] The working principle of the power mechanism 7 of this device is as follows:

[0064] The user can send a height adjustment instruction to the servo motor 73 through the remote control. After receiving the instruction, the servo motor 73 starts to work, and the rotational motion at its output end is transmitted to the mounting shaft 71, causing the mounting shaft 71 and the threaded column 72 thereon to rotate together. Since the threaded column 72 fits tightly with the threaded groove on the support column 2, as the threaded column 72 rotates, the moving member 3 will move up or down linearly along the support column 2, thereby changing the height position of the megaphone body 6. The whole process is smooth and controllable, ensuring that the megaphone can be used efficiently in various environments;

[0065] Through the precise control of the servo motor 73, fine adjustment of the height of the moving member 3 can be achieved, meeting the specific requirements for the height of the megaphone in different scenarios. The use of high-precision thread fitting ensures the stability of the moving member 3 during movement, avoiding problems such as sound distortion caused by shaking. It supports remote control, allowing users to complete height adjustment without directly contacting the device, greatly improving the convenience of use.

[0066] Traditional storage mechanisms can be implemented using existing technologies such as simple box structures or folding brackets. However, these existing technologies can only achieve basic storage functions and usually have problems such as low space utilization, poor protection effects, or inconvenient operation. In this device, efficient space utilization, good protection performance, and convenient storage and deployment operations are required to meet the usage needs in outdoor or complex environments and solve the problems of equipment damage or cumbersome operation caused by improper storage in traditional technologies. To solve the above problems, a more optimal storage mechanism 1 is designed in this device, as Figure 1 and Figure 2 shown, including:

[0067] The storage box 11 is made of high-strength engineering materials and has sufficient structural strength to support the entire device. It has a cavity inside for storing the megaphone body 6, and a notch is provided at the top for the easy entry and exit of the megaphone body 6. An installation seat 11a is provided at the bottom of the storage box 11, and multiple fixing holes are provided on the installation seat 11a for fixing the storage box 11 to the ground or other supports;

[0068] The sealing cover 12 is arranged on the moving member 3. The sealing cover 12 is made of the same material as the storage box 11. The sealing cover 12 is snap-connected to the notch of the storage box 11 to form a sealed storage space. An inner hole is provided on the sealing cover 12, and the support column 2 is slidably installed in the inner hole of the sealing cover 12 to ensure that the support column 2 does not block the movement of the megaphone body 6;

[0069] The storage battery 13 is arranged inside the storage box 11 and uses a high-performance lithium-ion battery to provide power supply for the power mechanism 7 and the drive mechanism 8;

[0070] The working principle of the storage mechanism 1 of this device is as follows:

[0071] Storage state: When the device is not in use, the user can control the driving mechanism to lower the positions of the megaphone body 6 and the sealing cover 12, and retract them into the cavity of the storage box 11. The sealing cover 12 is snap-connected to the notch of the storage box 11 to form a sealed storage space, protecting the internal components from the external environment;

[0072] Use state: When the device needs to be used, the user can control the driving mechanism to raise the positions of the megaphone body 6 and the sealing cover 12. Then, the sealing cover 12 is disconnected from the notch of the storage box 11, and the megaphone body 6 can be moved out of the cavity of the storage box 11 for operation;

[0073] The design of the storage mechanism 1 enables the entire device to be conveniently stored when not in use, facilitating portability and storage. The combined design of the sealing cover 12 and the storage box 11 effectively prevents dust and moisture from entering the device, extending the service life of the device. The mounting base 11a and fixing holes at the bottom of the storage box 11 ensure the stability of the device during use, preventing the device from tipping over due to external forces.

[0074] Traditional driving mechanisms can use simple rotating motors combined with speed reducers or manual rotating handles and other existing technologies to achieve the direction adjustment of the megaphone. However, these existing technologies can only achieve simple rotation functions and usually have problems such as low adjustment accuracy, cumbersome operation, or inability to be remotely controlled. In this device, high-precision direction adjustment, smooth rotational movement, and remotely controllable operation are required to meet the usage requirements in complex environments and solve the problem of inaccurate sound propagation direction caused by improper direction adjustment in traditional technologies. To solve the above problems, a more optimized driving mechanism 8 is designed in this device, as Figures 3 to 6 shown, including:

[0075] The support shaft 81 is rotatably arranged inside the storage box 11. The support shaft 81 can be made of high-strength stainless steel material, having good wear resistance and torsional resistance. The support shaft 81 is coaxially installed with the notch of the storage box 11, and the support column 2 is coaxially arranged on the support shaft 81 to ensure that the support column 2 can rotate together with the support shaft 81;

[0076] The transmission gear 82 is coaxially arranged on the support shaft 81;

[0077] The straight rack 83 is provided with a shaft hole and a guide groove. The straight rack 83 is meshed with the transmission gear 82, converting linear motion into rotational motion, thereby driving the support shaft 81 and the support column 2 to rotate;

[0078] The maximum swing distance of the straight rack 83 meshes with the transmission gear 82 to drive the support shaft 81 to rotate 360°;

[0079] The transmission mechanism 84 is arranged inside the storage box 11, and the straight rack 83 is arranged on the transmission mechanism 84, which is used to provide the straight rack 83 with a reciprocating displacement movement relative to the transmission gear 82;

[0080] The limiting mechanism 85 is arranged on the transmission mechanism 84, and the straight rack 83 is connected to the limiting mechanism 85, which is used to limit the moving track of the straight rack 83;

[0081] The working principle of the driving mechanism 8 of this device is as follows:

[0082] When the device needs to be used, the user can send an instruction to the transmission mechanism 84 through the remote control, so that the straight rack 83 moves along the guiding groove. The movement of the straight rack 83 is transmitted to the support shaft 81 through the transmission gear 82, so that the support shaft 81 and the support column 2 rotate, thereby adjusting the shouting direction of the loudspeaker body 6 to ensure that the sound can be accurately and efficiently transmitted to the target area;

[0083] Through the precise cooperation of the transmission gear 82 and the straight rack 83, the direction of the loudspeaker body 6 can be accurately adjusted to meet the usage requirements in different scenarios. The limiting mechanism 85 ensures that the straight rack 83 moves within a predetermined range, avoids equipment damage caused by overshoot, improves the stability of the system, supports remote control, and the user can complete the direction adjustment without directly contacting the equipment, greatly improving the convenience of use. By restricting the rotation angle of the loudspeaker body 6, the winding of the servo motor 73 and the connecting wire between the loudspeaker body 6 and the storage battery is protected, increasing the applicability of the device.

[0084] Traditional transmission mechanisms can use existing technologies such as simple screw drive mechanisms or hydraulic drive mechanisms to achieve the displacement movement of the straight rack 83. However, these existing technologies can only achieve simple linear displacement functions, and usually have problems such as low transmission accuracy, complex structures, or high maintenance costs. And in this device, high-precision displacement control, stable transmission effects, and low-maintenance-cost operations are required to meet the usage requirements in complex environments and solve the problem of inaccurate direction adjustment caused by improper displacement control in traditional technologies. To solve the above problems, a more optimal transmission mechanism 84 is designed in this device, as Figures 3 to 6 shown, including:

[0085] The fixing part 84a is arranged inside the storage box 11. The fixing part 84a can be made of high-strength engineering materials and has sufficient structural strength to support the entire transmission mechanism;

[0086] The two transmission shafts 84b are made of high-strength stainless steel material with good wear resistance and torsion resistance, and are rotatably arranged on the fixing member 84a and the limiting mechanism 85 respectively. The transmission shaft 84b is provided with a connecting gear 84c, and the connecting gear 84c is eccentrically arranged. The two connecting gears 84c are meshed and transmitted to realize the relative displacement of the distance between the two transmission shafts 84b. The transmission shaft 84b arranged on the limiting mechanism 85 is rotatably arranged inside the shaft hole of the spur rack 83 to provide displacement power for the spur rack 83. The transmission shaft 84b arranged on the fixing member 84a is slidably arranged inside the guide groove of the spur rack 83 to limit the moving track of the spur rack 83 and ensure the linear motion of the spur rack 83.

[0087] Auxiliary member 84e, two connecting gears 84c are rotatably disposed in two positioning holes of the auxiliary member 84e, for ensuring stable meshing of the two connecting gears 84c;

[0088] The driving motor 84d is disposed on the fixing member 84a. The driving motor 84d is a high-performance DC motor, and the output end of the driving motor 84d is connected to the conducting shaft 84b disposed on the fixing member 84a.

[0089] The working principle of the transmission mechanism 84 of the present device is as follows:

[0090] When the driving motor 84d receives the control signal and starts working, its output end rotates, driving the connected transmission shaft 84b to rotate. Since the connecting gear 84c is eccentrically arranged, when one transmission shaft 84b rotates, it drives the other transmission shaft 84b to generate relative displacement in the vertical direction. This relative displacement is converted into the reciprocating displacement motion of the spur rack 83 through the connection relationship between the transmission shaft 84b and the spur rack 83. Specifically, the transmission shaft 84b arranged on the limiting mechanism 85 is connected to the spur rack 83 through the shaft hole to provide displacement power, while the transmission shaft 84b arranged on the fixing member 84a cooperates with the spur rack 83 through the guide groove to limit its movement trajectory.

[0091] The transmission mechanism 84 converts the rotational motion of the driving motor 84d into the reciprocating displacement motion of the spur rack 83 through an ingenious structural design and a motion conversion mechanism, thereby driving the loudspeaker body 6 to adjust the direction.

[0092] As a preferred embodiment, the present device designs a more optimal limiting mechanism 85, such as Figures 3 to 6 As shown, including:

[0093] The positioning slide rail 85a is disposed on the fixing member 84a, and a guide groove is disposed on the positioning slide rail 85a;

[0094] The limiting member 85b is arranged on the positioning slide rail 85a and is slidably installed along the length direction of the positioning slide rail 85a. A conduction shaft 84b is rotatably arranged in the assembly hole of the limiting member 85b;

[0095] The matching design of the limiting member 85b and the positioning slide rail 85a ensures that the straight rack 83 moves within a predetermined range, avoids equipment damage caused by overshoot, and improves the stability of the system.

[0096] For the retractable multi-functional megaphone of the present utility model, its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0097] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

[0098] In the traditional technology, for the height adjustment and direction adjustment of the megaphone, manual adjustment or a simple mechanical structure is usually adopted, such as realizing it by manually rotating screws or adjusting brackets. Although these existing technologies can achieve the basic adjustment functions.

Claims

1. A retractable multifunctional megaphone, characterized in that: include: The storage mechanism (1) is independently fixed; A support column (2) is arranged on the storage mechanism (1), and the support column (2) is provided with a thread groove along the length direction; A moving member (3) is arranged on the support column (2), and the moving member (3) is slidably installed along the length direction of the support column (2); A mounting member (4) is arranged on the moving member (3); a mounting column group (5) is arranged on the mounting member (4), and bolts are arranged at the ends of the mounting column group (5); A megaphone body (6) is arranged on the mounting column group (5) and fixed by bolts; A power mechanism (7) is arranged on the mounting member (4) and is used for adjusting the position of the megaphone body (6) by telescoping; A driving mechanism (8) is arranged on the storage mechanism (1) and is used to adjust the speaking direction of the megaphone body (6).

2. The retractable multifunctional megaphone according to claim 1, characterized in that: The power mechanism (7) comprises: A mounting shaft (71) is rotatably disposed in a connection hole of the mounting member (4), and a threaded column (72) is coaxially disposed on the mounting shaft (71), and the threaded column (72) is mounted in cooperation with a threaded groove on the support column (2); The servo motor (73) is arranged on the mounting member (4), and the output end of the servo motor (73) is mounted on the mounting shaft (71).

3. The retractable multifunctional megaphone according to claim 1, characterized in that: The storage mechanism (1) comprises: A storage box (11) having a cavity inside and a notch at the top; A sealing cover (12) is arranged on the movable member (3), the sealing cover (12) is buckled and connected with the notch of the storage box (11), an inner hole is arranged on the sealing cover (12), and the support column (2) is slidably mounted with the inner hole of the sealing cover (12); A storage battery (13) is arranged inside the storage box (11) and is used to provide electric energy to the power mechanism (7) and the drive mechanism (8).

4. The retractable multifunctional megaphone according to claim 3, characterized in that: A mounting seat (11a) is provided at the bottom end of the storage box (11), and a plurality of fixing holes are provided on the mounting seat (11a).

5. The retractable multifunctional megaphone according to claim 3, characterized in that: The driving mechanism (8) comprises: A support shaft (81) is rotatably disposed inside the storage box (11), and the support shaft (81) is coaxially mounted with a notch of the storage box (11), and the support column (2) is coaxially disposed on the support shaft (81); A transmission gear (82) is coaxially arranged on the support shaft (81); A spur rack (83) is provided with an axial hole and a guide groove, and the spur rack (83) is meshingly connected with the transmission gear (82); A transmission mechanism (84) is disposed inside the storage box (11), and the spur rack (83) is disposed on the transmission mechanism (84) and is used to provide the spur rack (83) with a reciprocating displacement motion relative to the transmission gear (82); The limiting mechanism (85) is arranged on the transmission mechanism (84), and the spur rack (83) is connected to the limiting mechanism (85), and is used to limit the movement track of the spur rack (83).

6. The retractable multifunctional megaphone according to claim 5, characterized in that: The maximum swinging distance of the spur rack (83) meshes with the transmission gear (82) to drive the support shaft (81) to rotate 360 ​​degrees.

7. The retractable multifunctional megaphone according to claim 5, characterized in that: The transmission mechanism (84) comprises: A fixing member (84a) is arranged inside the storage box (11); Two transmission shafts (84b) are rotatably disposed on the fixing member (84a) and the limiting mechanism (85), respectively; a connecting gear (84c) is disposed on the transmission shaft (84b), and the connecting gear (84c) is eccentrically disposed; the two connecting gears (84c) are meshed and transmission-connected; the transmission shaft (84b) disposed on the limiting mechanism (85) is rotatably disposed inside the shaft hole of the spur rack (83); and the transmission shaft (84b) disposed on the fixing member (84a) is slidably disposed inside the guide groove of the spur rack (83); An auxiliary part (84e), wherein the two connecting gears (84c) are rotatably disposed in two positioning holes of the auxiliary part (84e) to ensure stable meshing of the two connecting gears (84c); A driving motor (84d) is arranged on the fixing member (84a), and an output end of the driving motor (84d) is connected to the conduction shaft (84b) arranged on the fixing member (84a).

8. The retractable multifunctional megaphone according to claim 7, characterized in that: The limiting mechanism (85) comprises: A positioning slide rail (85a) is arranged on the fixing member (84a), and a guide groove is arranged on the positioning slide rail (85a); The limiting member (85b) is arranged on the positioning slide rail (85a) and is slidably installed along the length direction of the positioning slide rail (85a). The limiting member (85b) is rotatably arranged in an assembly hole on one of the conduction shafts (84b).

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