Multi-frequency signal control box

Abstract

The utility model discloses a multi-frequency signal control box, which relates to the technical field of multi-frequency signal equipment and comprises a control box body. The axial flow fans are symmetrically arranged at the top of the control box body; the multi-frequency multiplication control device is arranged in the middle of the control box body; the circuit fixing mechanism is fixedly arranged on the side wall of one side in the control box body; the refrigeration sheet is arranged at the inner bottom end of the control box body and is matched with the axial flow fan; and the control panel is mounted on one side of the control box body. According to the utility model, the axial flow fan, the refrigeration sheet, the convection groove, the dustproof plate, the flow guide plate and the air outlet groove are arranged, and a large amount of heat energy can be generated in the operation process of the multi-frequency multiplication control device in the control box body, so that the heat dissipation efficiency is remarkably improved through the cooperation of the axial flow fan, the refrigeration sheet, the convection groove, the dustproof plate, the flow guide plate and the air outlet groove; and stable and efficient long-term operation of the electric appliance assembly in a suitable low-temperature environment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of multi-frequency signal equipment technology, and more specifically, to a multi-frequency signal control box. Background Technology

[0002] A multi-frequency signal control box is an electronic device used to generate, process, or control multi-frequency signals (such as high-frequency, harmonic, and frequency-divided signals). It is widely used in communications, power systems, RF testing, and signal analysis. Internally, it consists of multiple functional modules, each controlled by a multi-frequency control device. The multi-frequency signal control box provides specific frequency, amplitude, and phase harmonic signals to relevant systems or equipment to meet control and testing needs under complex operating conditions.

[0003] For example, patent application CN218388387U discloses a multi-frequency signal control box, which includes a box body, a box door, a multi-frequency signal control device, a cooling fan and a cooling tank. The box door is rotatably mounted on the box body, the multi-frequency signal control device is installed inside the box body, the cooling fan is installed at the bottom of the box body, and the cooling tank is evenly arranged on the side wall of the box body.

[0004] While existing multi-frequency signal control boxes possess heat dissipation and ventilation functions and can manage wiring, their internal structure is complex. During maintenance and repair, the numerous wires can easily lead to problems such as wire tangling and loosening, resulting in maintenance difficulties and ultimately affecting the efficiency of the multi-frequency signal control box.

[0005] Furthermore, the internal structure of the multi-frequency signal control box is quite complex, with numerous functional modules connected. Due to poor heat dissipation within existing multi-frequency signal control boxes, the wiring ages rapidly, easily causing circuit burnout, thus increasing maintenance costs and shortening the lifespan of the control box itself.

[0006] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0007] In view of the problems in the related technologies, this utility model proposes a multi-frequency signal control box to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] Therefore, the specific technical solution adopted by this utility model is as follows:

[0009] A multi-frequency signal control box includes: a control box body; an axial flow fan symmetrically arranged on the top of the control box body; a multi-frequency control device arranged in the middle of the control box body; a wiring fixing mechanism fixedly arranged on one side wall inside the control box body; a cooling chip arranged at the bottom of the control box body and cooperating with the axial flow fan; and a control panel installed on one side of the control box body.

[0010] Furthermore, to ensure the stable and efficient long-term operation of electrical components in a suitable low-temperature environment, avoiding performance degradation, functional failure, or even burnout due to overheating, and preventing short circuits and poor contact caused by external dust and impurities, thus guaranteeing the reliability and safety of equipment operation and reducing maintenance costs and downtime risks, a convection slot is provided at one end of the control box body to cooperate with the cooling plate and axial flow fan. A dustproof plate is also provided at one end of the control box body to cooperate with the convection slot. Guide plates are symmetrically arranged at the bottom of the control box body to cooperate with the cooling plate and axial flow fan. Two air outlet slots are provided between the two sets of axial flow fans to cooperate with the cooling plate.

[0011] Furthermore, to avoid tangled wiring and to make the wiring inside the control box more organized and compact, thereby extending the lifespan of the control box and reducing the risk of damage due to excessive accumulation and compression of wiring, ensuring the safe operation of the multi-frequency control device within the space, the wiring fixing mechanism includes a protective shell fixedly installed on one side wall inside the control box. A drive shaft is inserted through the top of the protective shell, and several linearly arranged drive gears are fitted on the drive shaft. Several linearly arranged first movable slots are opened at the bottom of the control box, and a driven gear is installed inside each first movable slot. An annular groove is opened inside the driven gear, and a limit ring is provided on the inner circumference of the annular groove. Several limit grooves are opened in the circumferential direction at the top of the limit ring. Several second movable slots are opened in the circumferential direction at the top of the driven gear. A movable plate is installed on the limit groove, and the limit groove cooperates with the movable plate. A pressure plate is provided at one end of the movable plate, and several pressure blocks are arranged in a linear direction at equal intervals at both ends of the pressure plate. A movable column that cooperates with the second movable slot is provided at the other end of the movable plate. A servo motor is connected to the drive shaft through the protective shell. The driving gear and the driven gear mesh with each other.

[0012] The bottom of the protective housing has several support blocks arranged in a linear direction. Each support block has a limiting groove. One end of the driven gear has a limiting disc that mates with the limiting groove. One end of the protective housing has a cable port, and the other end has a cable conduit with a U-shaped structure that works in conjunction with a multi-frequency control device.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By incorporating an axial flow fan, cooling plates, convection channels, dustproof plates, guide plates, and air outlet channels, the multi-frequency control device inside the control box generates a large amount of heat during operation. This significantly improves heat dissipation efficiency through the coordinated operation of the axial flow fan, cooling plates, convection channels, dustproof plates, guide plates, and air outlet channels. This ensures that the electrical components operate stably and efficiently for extended periods in a suitable low-temperature environment, preventing performance degradation, functional failures, or even burnout due to overheating, as well as potential hazards such as short circuits and poor contact caused by external dust and impurities. This guarantees the reliability and safety of equipment operation and reduces maintenance costs and downtime risks.

[0015] 2. By setting up a wiring fixing mechanism, the messy wiring inside the control box is centrally fixed due to the complex internal structure, avoiding wiring crossing and tangling. This makes the wiring inside the control box more orderly and compact, extends the service life of the control box, reduces the risk of damage to the wiring due to excessive accumulation and compression, and ensures the safe operation of the multi-frequency control device in the space. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multi-frequency signal control box according to an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of a multi-frequency signal control box according to an embodiment of the present utility model;

[0019] Figure 3 This is a partial structural schematic diagram of a multi-frequency signal control box according to an embodiment of the present utility model;

[0020] Figure 4 This is one of the partial schematic diagrams of a circuit fixing mechanism in a multi-frequency signal control box according to an embodiment of the present utility model;

[0021] Figure 5 This is a second partial schematic diagram of a circuit fixing mechanism in a multi-frequency signal control box according to an embodiment of the present utility model;

[0022] Figure 6 This is a third partial schematic diagram of a circuit fixing mechanism in a multi-frequency signal control box according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of one side of the line fixing mechanism in a multi-frequency signal control box according to an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram of the other side of the circuit fixing mechanism in a multi-frequency signal control box according to an embodiment of the present utility model.

[0025] In the picture:

[0026] 1. Control box body; 2. Axial flow fan; 3. Multi-frequency control device; 4. Wiring fixing mechanism; 401. Protective shell; 4011. Cable port; 4012. Cable conduit; 402. Drive shaft; 403. Drive gear; 404. First movable slot; 405. Driven gear; 4051. Limiting disc; 406. Annular slot; 407. Limiting ring; 408. Limiting slot; 409. Second movable slot; 410. Movable plate; 411. Pressure plate; 412. Pressure block; 413. Movable column; 414. Servo motor; 415. Support block; 416. Limiting circular slot; 5. Cooling element; 6. Control panel; 7. Convection slot; 8. Dustproof plate; 9. Guide plate; 10. Air outlet slot; 11. Temperature sensor. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to an embodiment of the present invention, a multi-frequency signal control box is provided.

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-8 As shown, a multi-frequency signal control box according to an embodiment of the present utility model includes: a control box body 1; an axial flow fan 2 symmetrically arranged on the top of the control box body 1; a multi-frequency control device 3 arranged in the middle of the control box body 1; a line fixing mechanism 4 fixedly arranged on one side wall inside the control box body 1; a cooling chip 5 arranged at the bottom of the control box body 1 and cooperating with the axial flow fan 2; and a control panel 6 installed on one side of the control box body 1.

[0030] By utilizing the above-mentioned technical solution of this utility model, a wiring fixing mechanism 4 is provided. Due to the relatively complex internal structure of the control box body 1, the messy wiring inside the control box body 1 is concentrated and fixed, avoiding wiring cross-entanglement. This makes the wiring inside the control box body 1 more orderly and compact, improves the service life of the control box body 1, reduces the risk of damage to the wiring due to excessive accumulation and compression, and ensures the safe operation of the multi-frequency control device 3 in a limited space.

[0031] In addition, in specific applications, the multi-frequency control device 3 consists of a main control unit, a signal generation and processing module, a power amplification and drive module, an input / output interface, and a power management module.

[0032] The main control unit consists of a microprocessor responsible for signal generation algorithms, frequency control, parameter configuration and system coordination, a storage module, a communication interface that supports external control (such as RS-232, RS-485, Ethernet, USB or wireless modules) for interaction with the host computer or other devices.

[0033] The signal generation and processing module consists of a signal generator (which generates a base frequency signal using direct digital synthesis, phase-locked loop, or frequency synthesis techniques), a frequency multiplier / divider circuit (which multiplies the base frequency signal to the target frequency using a frequency multiplier, such as a diode or PLL, or reduces the frequency using a frequency divider), and a modulation and filtering unit (which implements modulation functions such as amplitude modulation, frequency modulation, and phase modulation; and low-pass, high-pass, or band-pass filters to eliminate harmonics and noise).

[0034] The power amplifier and drive module consists of a preamplifier (such as a low-noise amplifier), a power amplifier (types such as Class A / B / AB linear amplifiers and Class D / E high-efficiency amplifiers; devices such as GaN transistors, LDMOS, and integrated PA chips such as ADI's HMC series), an impedance matching network (LC network or transmission line transformer to ensure maximum power transmission), and protection circuitry.

[0035] The input / output interface consists of an input interface (external reference clock input and analog signal input), an output interface (multi-channel output and isolated output), and a monitoring interface (ADC sampling and alarm signal output).

[0036] The power management module consists of multiple voltage outputs (digital and analog power supplies), power conversion (DC-DC module and LDO regulator), and protection design (input reverse connection protection, surge suppression, and redundancy design).

[0037] The multi-frequency control device 3 consists of a main control unit, a signal generation and processing module, a power amplification and drive module, an input / output interface, and a power management module. These are all existing technologies and are not shown in the figure; therefore, they will not be described in detail here.

[0038] In one embodiment, for the control box body 1, one end of the control box body 1 has a convection groove 7 that cooperates with the cooling plate 5 and the axial flow fan 2. One end of the control box body 1 is provided with a dustproof plate 8 that cooperates with the convection groove 7. The bottom of the control box body 1 is symmetrically provided with guide plates 9 that cooperate with the cooling plate 5 and the axial flow fan 2. Two air outlet grooves 10 that cooperate with the cooling plate 5 are provided between the two sets of axial flow fans 2. This ensures that the electrical components operate stably and efficiently for a long time in a suitable low-temperature environment, avoiding performance degradation, functional failure, or even burnout due to overheating, as well as potential hazards such as short circuits and poor contact caused by external dust and impurities. This ensures the reliability and safety of equipment operation, and reduces maintenance costs and downtime risks.

[0039] Furthermore, in practical applications, a control panel 6 is installed on one side of the control box body 1. This control panel 6 is electrically connected to the control box body 1, axial flow fan 2, multi-frequency control device 3, wiring fixing mechanism 4, cooling element 5, and temperature sensor 11. Operators can input relevant data through the human-machine interface of the control panel 6, thereby enabling the control box body 1, axial flow fan 2, multi-frequency control device 3, wiring fixing mechanism 4, and cooling element 5 to sequentially fix the wiring and dissipate heat when the multi-frequency control device 3 inside the control box body 1 is running.

[0040] Furthermore, the control panel 6 is equipped with a human-machine interface and a PLC programmable logic controller. The human-machine interface is the interaction interface between the operator and the automation system. Its main function is to display the real-time operating status and the input of control commands. The PLC is used to execute specific control tasks, such as switching, controlling speed, or sensor signal acquisition and processing.

[0041] In addition, temperature sensor 11 refers to a sensor that can sense temperature and convert it into a usable output signal. Temperature sensor 11 is the core part of temperature measuring instrument. There are many types. According to the measurement method, it can be divided into two main categories: contact type (contact type is used in this solution) and non-contact type. According to the sensor material and electronic component characteristics, it can be divided into two categories: resistance temperature detector (RTD) and thermocouple. The temperature sensor in this solution is Pt100 E+H model.

[0042] The working principle of the axial fan 2, cooling plate 5, convection slot 7, dustproof plate 8, guide plate 9, and air outlet slot 10 is as follows: When the multi-frequency control device 3 inside the control box body 1 is running, it generates a large amount of heat energy, which is transferred to the temperature sensor 11. When the temperature inside the control box body 1 reaches a certain level (e.g., 40℃~50℃), the temperature sensor 11 feeds back the temperature inside the control box body 1 to the human-machine interface of the control panel 6. The operator uses the human-machine interface of the control panel 6 to start the axial fan 2 and cooling plate 5. The downward airflow from the axial fan 2 and the upward airflow from the cold end of the cooling plate 5 form convection. The two sets of guide plates, located in the middle of the control box body 1, cool the wiring inside the multi-frequency control device 3 and the wiring fixing mechanism 4. The upward airflow from the cold end of the cooling plate 5 dissipates heat from the air outlet slot 10 at the top of the control box body 1 through convection. To prevent thermal expansion and contraction inside the control box body 1, a convection groove 7 on one side of the control box body 1 is used to dissipate damage caused by convection. The dustproof plate 8 has a 7-shaped structure to prevent dust from entering the control box body 1 and affecting heat dissipation and the operation of the multi-frequency control device 3, and to dissipate heat from the multi-frequency control device 3 inside the control box body 1.

[0043] Furthermore, the thermocouple 5 is made of a semiconductor cooling material and typically consists of multiple thermocouple units. Each thermocouple unit contains an N-type semiconductor and a P-type semiconductor, which are alternately connected using a specific process to form a thermocouple structure. When a direct current passes through these thermocouple units, a temperature difference is generated at the junction of the N-type and P-type semiconductors based on the Peltier effect. Specifically, the junction where the current flows from the N-type semiconductor to the P-type semiconductor absorbs heat, causing the temperature at that point to decrease and forming a cold junction; while the junction where the current flows from the P-type semiconductor to the N-type semiconductor releases heat, causing the temperature at that point to increase and forming a hot junction.

[0044] In one embodiment, the wiring fixing mechanism 4 includes a protective shell 401 fixedly disposed on one side wall inside the control box body 1. A drive shaft 402 is inserted through the top of the protective shell 401, and a plurality of linearly arranged drive gears 403 are sleeved on the drive shaft 402. A plurality of linearly arranged first movable grooves 404 are opened at the bottom of the control box body 1. A driven gear 405 is disposed inside the first movable groove 404, and an annular groove 406 is opened inside the driven gear 405. The annular groove 406 is circumferentially... A limiting ring 407 is provided on the inner wall, and several limiting grooves 408 are opened in the top circumferential direction of the limiting ring 407; several second movable grooves 409 are opened in the top circumferential direction of the driven gear 405; a movable plate 410 is provided on the limiting groove 408, and the limiting groove 408 cooperates with the movable plate 410; a pressing plate 411 is provided at one end of the movable plate 410, and several pressing blocks 412 arranged in a linear direction at equal intervals are opened at both ends of the pressing plate 411; a movable column 413 that cooperates with the second movable groove 409 is provided at the other end of the movable plate 410. A drive shaft 402 passes through the protective shell 401 and is connected to a servo motor 414. The drive gear 403 meshes with the driven gear 405.

[0045] The bottom of the protective housing 401 is provided with several support blocks 415 arranged in a linear direction. Each support block 415 has a limiting groove 416. One end of the driven gear 405 is provided with a limiting disc 4051 that mates with the limiting groove 416. One end of the protective housing 401 has a cable port 4011, and the other end has a cable conduit 4012. The cable conduit 4012 has a U-shaped structure and mates with the multi-frequency control device 3, thus preventing wires from crossing and tangling. This makes the wiring inside the control box more organized and compact, extending the service life of the control box and reducing the risk of damage to the wiring due to excessive accumulation and compression, ensuring the safe operation of the multi-frequency control device within the space.

[0046] The working principle of the cable fixing mechanism 4: During cable installation, the cable is placed in the cable port 4011 of the protective shell 401 and connected to the cable conduit 4012 for cable introduction and installation. The U-shaped structure of the cable conduit 4012 connects with the multi-frequency control device 3. The human-machine interface of the control panel 6 starts the servo motor 414 and drives the drive shaft 402 to rotate. The drive shaft 402 drives the drive gear 403 to mesh with the driven gear 405, transmitting power to the driven gear 405, causing the driven gear 405 to rotate within the first movable groove 404. During rotation, the second movable groove 409 at the top of the driven gear 405 engages with the movable column 413, pushing the movable plate 410 to slide along the limiting groove 408. As the movable plate 410 moves, the pressure plate 411 drives the pressure block 412 to move closer to the cable, ultimately pressing and fixing the cable.

[0047] When the cable needs to be released, the human-machine interface of the control panel 6 controls the servo motor 414 to rotate in reverse, the drive shaft 402 drives the drive gear 403 to rotate in reverse, thereby driving the driven gear 405 to rotate in reverse. The driven gear 405, through the cooperation of the second movable groove 409 and the movable column 413, pulls the movable plate 410 to slide in the reverse direction along the limiting groove 408 on the limiting ring 407. The pressure plate 411 drives the pressure block 412 away from the cable, releasing the clamping and fixing of the cable. In addition, the limiting disc 4051 at one end of the driven gear 405, with the engaging cooperation of the limiting disc 4051 and the limiting groove 416, plays a limiting role for the driven gear 405, ensuring the stability of the driven gear 405 during rotation.

[0048] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0049] In practical applications, when it is necessary to install the wiring inside the control box body 1, the cable port 4011 of the wiring fixing mechanism 4 introduces the cable, the cable tube 4012 (U-shaped structure) leads out and is connected to the multi-frequency control device 3 for installation. Subsequently, the human-machine interface of the control panel 6 controls the servo motor 414 to start, the drive shaft 402 drives the drive gear 403 and the driven gear 405 to rotate, and pushes the movable plate 410 to slide along the limit groove 408. The pressing plate 411 drives the pressing block 412 to press the cable.

[0050] When the cable is released, the human-machine interface of the control panel 6 controls the servo motor 414 to run in reverse, the drive shaft 402 drives the drive gear 403 to rotate in reverse, and pulls the movable plate 410 to slide in reverse along the limit groove 408 on the limit ring 407. The pressure plate 411 drives the pressure block 412 away from the cable to release the fixation (the working principle of the line fixing mechanism 4 is as described above).

[0051] In addition, after the cables that need to be connected are fixed, a large amount of heat energy is generated during the operation of the multi-frequency control device 3. The heat energy is transferred to the temperature sensor 11. When the temperature inside the control box body 1 reaches a certain level (for example, 40℃~50℃), the temperature sensor 11 feeds back the temperature inside the control box body 1 to the human-machine interface of the control panel 6. The operator starts the axial flow fan 2 and the cooling plate 5 through the human-machine interface of the control panel 6. The downward airflow of the axial flow fan 2 and the upward airflow generated by the cold end of the cooling plate 5 form a convection. Under the central action of the two sets of guide plates 9, the hot air is dissipated from the air outlet 10 at the top of the control box body 1 through the convection phenomenon. The convection trough 7 can dissipate the damage caused by the convection, and the dustproof plate 8 prevents dust from entering and affecting heat dissipation (the working principle of the axial flow fan 2, cooling plate 5, convection trough 7, dustproof plate 8, guide plate 9 and air outlet 10 are as described above).

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-frequency signal control box, characterized in that, include: Control box body (1); An axial flow fan (2) is symmetrically arranged on the top of the control box body (1); A multi-frequency control device (3) is located in the middle of the control box body (1); The line fixing mechanism (4) is fixedly installed on one side wall inside the control box body (1); A cooling element (5) is disposed at the bottom inner end of the control box body (1) and cooperates with the axial flow fan (2); The control panel (6) is installed on one side of the control box body (1).

2. The multi-frequency signal control box according to claim 1, characterized in that, One end of the control box body (1) is provided with a convection groove (7) that cooperates with the cooling chip (5) and the axial flow fan (2).

3. The multi-frequency signal control box according to claim 1, characterized in that, The control box body (1) is provided with a dustproof plate (8) that cooperates with the convection channel (7) at one end.

4. The multi-frequency signal control box according to claim 1, characterized in that, The bottom of the control box body (1) is symmetrically provided with guide plates (9) that cooperate with the cooling chip (5) and the axial flow fan (2).

5. A multi-frequency signal control box according to claim 1, characterized in that, Two air outlet slots (10) that cooperate with the cooling plate (5) are provided between the two sets of axial flow fans (2).

6. A multi-frequency signal control box according to claim 1, characterized in that, The line fixing mechanism (4) includes a protective shell (401) fixedly installed on one side wall inside the control box body (1), a drive shaft (402) is inserted through the top of the protective shell (401), and a number of linearly arranged drive gears (403) are sleeved on the drive shaft (402). The bottom of the control box body (1) is provided with a plurality of first movable slots (404) arranged in a linear pattern. A driven gear (405) is provided inside the first movable slot (404). An annular slot (406) is provided inside the driven gear (405). A limiting ring (407) is provided on the inner circumference of the annular slot (406). A plurality of limiting slots (408) are provided on the top circumference of the limiting ring (407). The driven gear (405) has several second movable grooves (409) in the circumferential direction at the top; The limiting groove (408) is provided with a movable plate (410), and the limiting groove (408) cooperates with the movable plate (410). One end of the movable plate (410) is provided with a pressing plate (411), and both ends of the pressing plate (411) are provided with a plurality of pressing blocks (412) arranged in a linear direction at equal intervals. The other end of the movable plate (410) is provided with a movable column (413) that cooperates with the second movable groove (409); The drive shaft (402) passes through the protective shell (401) and is connected to a servo motor (414).

7. A multi-frequency signal control box according to claim 6, characterized in that, The drive gear (403) meshes with the driven gear (405).

8. A multi-frequency signal control box according to claim 6, characterized in that, The bottom of the protective shell (401) is provided with a number of support blocks (415) arranged in a linear direction. The support blocks (415) have a limiting groove (416) on them. One end of the driven gear (405) is provided with a limiting disc (4051) that cooperates with the limiting groove (416).

9. A multi-frequency signal control box according to claim 6, characterized in that, The protective shell (401) has a cable port (4011) at one end and a cable tube (4012) at the other end. The cable tube (4012) has a U-shaped structure and cooperates with the multi-frequency control device (3).

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