Digital network set top box with anti-interference function

Abstract

The invention relates to the field of image communication equipment, and particularly discloses a digital network set top box with an anti-interference function, the digital network set top box comprises a box body, a cooling fan and a position correction mechanism, a set top box main body and an intelligent antenna array control system are mounted on an inner network plate, and accurate position adjustment and stable fixation are realized through the position correction mechanism. The position correcting mechanism is composed of a plurality of supporting leg assemblies, each supporting leg assembly comprises a supporting rod, a screw rod, an expansion nail and a limiting screw pipe, and it is ensured that equipment is stably placed under various installation face conditions. In addition, the cooling fan is linked with the temperature control switch, so that the internal temperature is effectively reduced, and the operation stability of equipment is improved. According to the invention, the purposes of improving the anti-interference performance of the equipment, enhancing the signal receiving capability and improving the heat dissipation effect are achieved.

Description

Technical Field

[0001] This application relates to the field of image communication devices, and particularly to a digital network set-top box with anti-interference function. Background Art

[0002] Currently, digital network set-top boxes are an important part of modern home entertainment systems and are widely used in fields such as television signal reception, Internet access, and multimedia playback. With the progress of technology, the functions of set-top boxes have become increasingly rich, supporting not only high-definition video decoding but also various interactive service functions. However, during actual use, due to interference from environmental factors such as electromagnetic interference and temperature changes, the performance of the device deteriorates or even frequent failures occur, seriously affecting the user experience.

[0003] To improve the stability and reliability of digital network set-top boxes, the following measures are usually taken in the prior art: for example, installing heat sinks or air ducts inside the set-top box to reduce the operating temperature. By adjusting the installation position, such as keeping the set-top box away from the TV, to avoid the influence of strong magnetic fields or other interference sources on the device.

[0004] Regarding the above-related technologies, there are the following problems: When installing the set-top box, it is usually directly placed on the desktop or nailed to the wall with nails. As a result, the gap between the set-top box and the installation surface is too small, making it difficult for the end of the set-top box facing the installation surface to dissipate heat, which is not conducive to the overall stable operation of the set-top box. Summary of the Invention

[0005] To enable the set-top box to operate more stably, this application provides a digital network set-top box with anti-interference function.

[0006] The digital network set-top box with anti-interference function provided by this application adopts the following technical solutions: A digital network set-top box with anti-interference function includes a box body, a cooling fan, and an alignment mechanism. An internal network board is installed inside the box body, and a set-top box main body and an intelligent antenna array control system are installed on the internal network board, and the set-top box main body is connected to the intelligent antenna array control system; a cooling fan is provided on the top of the box body opposite to the set-top box main body and the intelligent antenna array control system; The alignment mechanism is installed on the bottom of the box body; the alignment mechanism includes a plurality of leg components, and each leg component includes a support rod, a first screw, a second screw, an expansion nail, and a limiting screw tube. The first end of the support rod is rotatably connected to the bottom of the box, and the second end of the support rod is coaxially connected to the first end of the first screw; The first end of the second screw is hinged to the second end of the first screw, and the second screw can be coaxial with the first screw; the second end of the second screw is coaxially connected to the expansion nail; the limiting screw tube is screwed to the first screw and can also be screwed to the second screw.

[0007] By adopting the above technical solutions, through the introduction of the intelligent antenna array control system, the surrounding electromagnetic environment is monitored in real time, the antenna array configuration is automatically adjusted, the capture ability of the target signal and the anti-interference performance are enhanced, and the cooperation of the set-top box main body and the intelligent antenna array control system significantly improves the reception quality and stability of the digital signal, effectively reducing the influence of external electromagnetic interference. The design of the cooling fan not only helps to reduce the internal temperature and extend the service life of the device, but also further enhances the stability and reliability during system operation. The multi-foot component design of the alignment mechanism ensures the stability of the set-top box under different installation surface conditions. When the set-top box is placed on the table, the foot components can be unfolded by rotating multiple support rods, separating the box body from the installation surface, which is beneficial to the heat dissipation of the box body. At the same time, in order to fix the box body more stably, installation holes can be set on the installation surface, and the expansion nails can be inserted into the installation holes to achieve the stable fixation of the set-top box. In summary, through the optimization of the structural design, the present invention realizes the comprehensive improvement of the anti-interference ability and the overall performance.

[0008] Preferably, a receiving groove is provided at the second end of the second screw, and the depth of the receiving groove is arranged along the axial direction of the second screw; a movable spreading plate is arranged in the receiving groove; The expansion nail includes two semi-cylinders arranged along the axis direction of the second screw; the two semi-cylinders are symmetrically arranged with the center line of the receiving groove as the axis, and the distance between the two semi-cylinders is less than the width of the receiving groove; A push rod located outside the receiving groove is provided at the first end of the spreading plate, and a guiding cone is provided at the second end, and the larger diameter end of the guiding cone is connected to the spreading plate, and the smaller diameter end is located between the two semi-cylinders.

[0009] By adopting the above technical solutions, when the limiting screw tube rotates and moves towards the guiding cone, it can push the push rod towards the guiding cone, and then the spreading plate can move in the axial direction of the second screw, so as to push the guiding cone into the gap between the two semi-cylinders, causing the two semi-cylinders of the expansion nail to separate and expand in the installation hole, realizing the stable fixation of the expansion nail in the installation hole.

[0010] Preferably, a plurality of inverted teeth are provided on the opposite sides of the two semi-cylinders.

[0011] By adopting the above technical solution, the friction between the expansion nail and the installation hole can be increased, the fixing stability of the set-top box can be improved, and the position deviation or loosening caused by external vibration can be prevented.

[0012] Preferably, the spreading plate is slidably connected to the second screw in the axial direction of the second screw.

[0013] By adopting the above technical solution, the spreading plate can be directionally slid in the axial direction of the second screw, and the sliding track of the spreading plate is defined.

[0014] Preferably, a clamping groove is provided at one end of the limit screw tube facing the spreading plate, and the push rod is used to be clamped into the clamping groove.

[0015] By adopting the above technical solution, when the limit screw tube rotates and moves towards the guiding cone, the limit screw tube on the side of the clamping groove contacts the push rod first. Then the limit screw tube further rotates, and the limit screw tube pushes the spreading plate, so that the guiding cone enters the gap between the two semi-cylinders. When the two semi-cylinders of the expansion nail gradually separate and expand in the installation hole, the clamping groove will gradually approach the push rod until the push rod is clamped into the clamping groove, realizing the clamping connection between the push rod and the limit screw tube. At this time, the expansion nail is also firmly fixed in the installation hole. And due to the clamping connection between the push rod and the limit screw tube, the spreading plate and the limit screw tube can be locked with each other to ensure the stability of the spreading plate and the limit screw tube.

[0016] Preferably, a plurality of long through holes corresponding to the plurality of foot assemblies are provided on the box bottom, the foot assemblies are arranged in the corresponding long through holes, and the support rod, the first screw, the second screw, the expansion nail and the limit screw tube are all arranged along the length direction of the long through holes.

[0017] By adopting the above technical solution, the long through holes are used to accommodate the foot assemblies.

[0018] Preferably, the alignment mechanism further includes a plurality of sub-driving components corresponding to the plurality of foot assemblies, and the sub-driving components are arranged between the box bottom and the inner net plate; The sub-driving component includes a lead screw, a nut and a connecting rod. The lead screw is arranged along the length direction of the long through hole and is rotatably connected to the box bottom; the nut is screwed to the lead screw and is also slidably connected to the box bottom; the connecting rod is located in the long through hole, and one end is hinged to the nut and the other end is hinged to the second end of the corresponding first screw.

[0019] By adopting the above technical solution, the lead screw drives the nut to move towards the first end of the support rod, so that the connecting rod rotates downward, and then pushes the support rod to rotate out of the box body, realizing the unfolding of the foot assembly.

[0020] Preferably, the calibration mechanism further comprises a driving gear and a plurality of driven gears corresponding to the plurality of screw rods, the driving gear is rotatably connected to the box bottom, and one end of the driving gear is connected to the box body with a motor; The plurality of driven gears are all meshed with the driving gear, and the driven gears are coaxially connected with the corresponding lead screws.

[0021] By adopting the above technical solution, the positioning mechanism of the set-top box can drive the active gear to rotate through the motor, thereby driving multiple driven gears to rotate synchronously, realizing the simultaneous movement of multiple lead screws, and then realizing the synchronous deployment of multiple leg assemblies.

[0022] Preferably, a temperature control switch (20) connected to the cooling fan is installed on the inner mesh plate.

[0023] By adopting the above technical solution, the temperature control switch (20) can automatically control the start and stop of the cooling fan according to the change of the internal temperature of the set-top box, thereby effectively avoiding the problem of equipment performance degradation or damage due to overheating, while saving energy.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. In this application, a cooling fan is arranged on the top of the box body and arranged relative to the set-top box body and the intelligent antenna array control system, thereby effectively improving the overall heat dissipation efficiency of the set-top box, reducing the risk of equipment performance degradation and failure due to increased temperature, improving the anti-interference ability of the set-top box, and facilitating the stable operation of the set-top box.

[0025] 2. The introduction of the intelligent antenna array control system in this application enhances the anti-interference capability of the set-top box, especially in complex electromagnetic environments, ensures the stability and accuracy of signal transmission, and improves the user experience.

[0026] 3. In the present application, when the limit screw tube rotates and moves toward the guide cone, it can push the push rod to move toward the guide cone, so that the expansion plate can move in the axial direction of the second screw, thereby pushing the guide cone into the gap between the two semi-cylinders, so that the two semi-cylinders of the expansion nail are separated and expanded in the mounting hole, thereby achieving a firm fixation of the expansion nail in the mounting hole.

[0027] 4. The positioning mechanism of the set-top box in the present application can drive the active gear to rotate through a motor, thereby driving multiple driven gears to rotate synchronously, realizing the simultaneous movement of multiple lead screws, and then realizing the synchronous deployment of multiple leg assemblies. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the storage of the calibration mechanism of an embodiment of the present application; Figure 2 is a schematic diagram of the calibration mechanism of an embodiment of the present application; Figure 3 yes Figure 2 A schematic cross-sectional structure diagram of ; Figure 4 1. is a schematic diagram of the unfolded structure of the support leg assembly after the limiting screw tube is used for limiting; Figure 5 It is a schematic diagram of the unfolded structure of the support leg assembly after the limiting screw tube releases the limit.

[0030] Reference numerals: 1. Box body; 101. Air inlet; 102. Long through hole; 11. Box bottom; 12. Inner mesh plate; 13. Inner top plate; 14. Box top; 15. Set-top box body; 16. Intelligent antenna array control system; 2. Cooling fan; 20. Temperature control switch; 3. School institution; 31. Support foot assembly; 311. Support rod; 312. First screw rod; 313. Second screw rod; 31301. Accommodation groove; 314. Expansion nail; 3141. Semi-cylinder; 3142. Inverted teeth; 315. Opening plate; 3151. Guide cone; 3152. Plug; 316. Limiting screw tube; 31601. Card slot; 32. Auxiliary drive assembly; 321. Screw rod; 322. Nut; 323. Connecting rod; 33. Main drive assembly; 331. Driving gear; 332. Driven gear; 333. Motor. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 - 5 This application is described in further detail.

[0032] The embodiment of the present application discloses a digital network set-top box with an anti-interference function.

[0033] Reference Figure 1 , Figure 2 and Figure 3, a digital network set-top box with anti-interference function, comprising a box body 1, a cooling fan 2 and an alignment mechanism 3. An inner network board 12 is installed in the box body 1. A set-top box main body 15 and an intelligent antenna array control system 16 are installed on the inner network board 12. The set-top box main body 15 and the intelligent antenna array control system 16 are connected. Here, both the set-top box main body 15 and the intelligent antenna array control system 16 are prior arts. A cooling fan 2 and an inner top plate 13 are provided on the top 14 of the box body 1 opposite to the set-top box main body 15 and the intelligent antenna array control system 16. The inner top plate 13 is connected to the box body 1, and the cooling fan 2 is connected to the inner top plate 13. A plurality of air inlet holes 101 are provided on the side wall of the box body 1, and the air inlet holes 101 are located between the inner top plate 13 and the top 14 of the box body 1. A plurality of long through holes 102 are provided on the bottom 11 of the box body 1.

[0034] Referring to Figure 3 , Figure 4 and Figure 5 , the alignment mechanism 3 is installed on the bottom 11 of the box body 1. The alignment mechanism 3 includes a plurality of support leg assemblies 31. The support leg assembly 31 includes a support rod 311, a first screw 312, a second screw 313, an expansion nail 314 and a limit screw tube 316. The first end of the support rod 311 is rotatably connected to the bottom 11 of the box body 1, and the second end of the support rod 311 is coaxially connected to the first end of the first screw 312. The first end of the second screw 313 is hinged to the second end of the first screw 312, and the second screw 313 can be coaxial with the first screw 312. The second end of the second screw 313 is coaxially connected to the expansion nail 314. The limit screw tube 316 is screwed to the first screw 312 and can also be screwed to the second screw 313.

[0035] Referring to Figure 3 , Figure 4 and Figure 5 Referring to Figure 3 , Figure 4 and Figure 5, in the embodiment of the present application, by introducing the intelligent antenna array control system 16, the surrounding electromagnetic environment is monitored in real time, the antenna array configuration is automatically adjusted, the ability to capture target signals and anti-interference performance are enhanced, and the combined use of the set-top box main body 15 and the intelligent antenna array control system 16 significantly improves the reception quality and stability of digital signals, and effectively reduces the influence of external electromagnetic interference. The design of the cooling fan 2 not only helps to reduce the internal temperature and extend the service life of the device, but also further enhances the stability and reliability during system operation. The design of the multi-leg components 31 of the alignment mechanism 3 ensures the stability of the set-top box under different installation surface conditions. When the set-top box is placed on the desktop, the leg components 31 can be unfolded by rotating multiple support rods 311, separating the box body 1 from the installation surface, which is beneficial to the heat dissipation of the box body 1. At the same time, in order to fix the box body 1 more stably, installation holes can be set on the installation surface, and the expansion nails 314 can be inserted into the installation holes to achieve stable fixation of the set-top box. In summary, through the optimization of the structural design, the present invention realizes the comprehensive improvement of the anti-interference ability and the overall performance.

[0036] Refer to Figure 3 、 Figure 4 and Figure 5 , a receiving groove 31301 is provided at the second end of the second screw 313, and the groove depth of the receiving groove 31301 is set along the axial direction of the second screw 313. A movable spreading plate 315 is provided in the receiving groove 31301. The expansion nail 314 includes two semi-cylinders 3141 arranged along the axis direction of the second screw 313. The two semi-cylinders 3141 are symmetrically arranged with the center line of the receiving groove 31301 as the axis, and the distance between the two semi-cylinders 3141 is less than the width of the receiving groove 31301. A push rod located outside the receiving groove 31301 is provided at the first end of the spreading plate 315, and a guiding cone 3151 is provided at the second end, and the larger diameter end of the guiding cone 3151 is connected to the spreading plate 315, and the smaller diameter end is located between the two semi-cylinders 3141.

[0037] Refer to Figure 3 、 Figure 4 and Figure 5 , in the embodiment of the present application, when the limit screw tube 316 rotates and moves towards the guiding cone 3151, it can push the push rod towards the guiding cone 3151, so that the spreading plate 315 can move in the axial direction of the second screw 313, thereby pushing the guiding cone 3151 into the gap between the two semi-cylinders 3141, separating and expanding the two semi-cylinders 3141 of the expansion nail 314 in the installation hole, and realizing the stable fixation of the expansion nail 314 in the installation hole.

[0038] Refer to Figure 3 、 Figure 4 and Figure 5, on the opposite sides of the two semi-cylinders 3141, a plurality of reverse teeth 3142 are provided. In the embodiment of the present application, the friction between the expansion nail 314 and the installation hole can be increased, the fixing stability of the set-top box can be improved, and the position deviation or loosening caused by external vibration can be prevented.

[0039] Referring to Figure 3 , Figure 4 and Figure 5 , the spreading plate 315 is slidably connected to the second screw 313 in the axial direction of the second screw 313. In the embodiment of the present application, the spreading plate 315 can be slid in a directional manner in the axial direction of the second screw 313, and the sliding trajectory of the spreading plate 315 is defined.

[0040] Referring to Figure 3 , Figure 4 and Figure 5 , at one end of the limiting screw tube 316 facing the spreading plate 315, a card slot 31601 is provided, and the push rod is used to be inserted into the card slot 31601. In the embodiment of the present application, when the limiting screw tube 316 rotates and moves towards the guiding cone 3151, the limiting screw tube 316 on the side of the card slot 31601 first contacts the push rod. Then the limiting screw tube 316 further rotates, and the limiting screw tube 316 pushes the spreading plate 315, so that the guiding cone 3151 enters the gap between the two semi-cylinders 3141. When the two semi-cylinders 3141 of the expansion nail 314 are gradually separated and expanded in the installation hole, the card slot 31601 will also gradually approach the push rod until the push rod is inserted into the card slot 31601, realizing the clamping connection between the push rod and the limiting screw tube 316. At this time, the expansion nail 314 is also firmly fixed in the installation hole. And due to the clamping connection between the push rod and the limiting screw tube 316, the spreading plate 315 and the limiting screw tube 316 can be locked with each other, ensuring the stability of the spreading plate 315 and the limiting screw tube 316.

[0041] Referring to Figure 3 , Figure 4 and Figure 5 , the bottom of the box 11 is provided with a plurality of long through holes 102 corresponding to the plurality of foot components 31. The foot components 31 are arranged in the corresponding long through holes 102, and the support rod 311, the first screw 312, the second screw 313, the expansion nail 314 and the limiting screw tube 316 are all arranged along the length direction of the long through hole 102. In the embodiment of the present application, the long through hole 102 is used to accommodate the foot components 31.

[0042] Referring to Figure 3 , Figure 4 and Figure 5, the alignment mechanism 3 further includes a plurality of secondary drive components 32 corresponding to the plurality of support leg components 31. The secondary drive components 32 are disposed between the bottom case 11 and the inner network board 12. The secondary drive component 32 includes a lead screw 321, a nut 322, and a connecting rod 323. The lead screw 321 is disposed along the length direction of the long through hole 102 and is rotatably connected to the bottom case 11. The nut 322 is threadedly engaged with the lead screw 321 and is also slidably connected to the bottom case 11. The connecting rod 323 is located within the long through hole 102, and one end thereof is hinged to the nut 322, and the other end is hinged to the second end of the corresponding first screw 312. In the embodiment of the present application, the lead screw 321 drives the nut 322 to move toward the first end of the support rod 311, causing the connecting rod 323 to rotate downward, thereby pushing the support rod 311 to rotate outward from the box body 1, realizing the deployment of the support leg component 31.

[0043] Referring to Figure 3 , Figure 4 and Figure 5 , the alignment mechanism 3 further includes a driving gear 331 and a plurality of driven gears 332 corresponding to the plurality of lead screws 321. The driving gear 331 is rotatably connected to the bottom case 11, and one end thereof is connected to the box body 1 with a motor 333. The plurality of driven gears 332 are all meshed with the driving gear 331, and the driven gear 332 is coaxially connected to the corresponding lead screw 321. In the embodiment of the present application, the alignment mechanism 3 of the set-top box can drive the driving gear 331 to rotate through the motor 333, thereby driving the plurality of driven gears 332 to rotate synchronously, realizing the simultaneous movement of the plurality of lead screws 321, and further realizing the synchronous deployment of the plurality of support leg components 31.

[0044] Referring to Figure 3 , Figure 4 and Figure 5 , a temperature control switch 20 connected to the cooling fan 2 is installed on the inner network board 12. In the embodiment of the present application, the temperature control switch 20 can automatically control the start and stop of the cooling fan 2 according to the change of the internal temperature of the set-top box, thereby effectively avoiding the problem of equipment performance degradation or damage caused by overheating, and saving energy at the same time.

[0045] The implementation principle of a digital network set-top box with an anti-interference function in the embodiment of the present application is as follows: The intelligent antenna array control system 16 monitors the surrounding electromagnetic environment in real time, automatically adjusts the antenna array configuration, enhances the capture ability of the target signal and the anti-interference performance. The combined use of the set-top box main body 15 and the intelligent antenna array control system 16 significantly improves the reception quality and stability of digital signals, and effectively reduces the influence of external electromagnetic interference.

[0046] The temperature control switch 20 can automatically control the start and stop of the cooling fan 2 according to the change of the internal temperature of the set-top box. The design of the cooling fan 2 not only helps to reduce the internal temperature and extend the service life of the equipment, but also further enhances the stability and reliability during system operation.

[0047] The design of the multi-foot component 31 of the alignment mechanism 3 ensures the stability of the set-top box under different installation surface conditions. When placing the set-top box on the desktop, the foot component 31 can be unfolded by rotating multiple support rods 311, separating the box body 1 from the installation surface, which is beneficial to the heat dissipation of the box body 1. At the same time, in order to fix the box body 1 more stably, installation holes can be set on the installation surface, and expansion nails 314 can be inserted into the installation holes to achieve stable fixation of the set-top box.

[0048] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "comprising" or "including" and the like are intended to mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0049] The above are all optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A digital network set-top box with anti-interference function, characterized in that: It includes a box body (1), a cooling fan (2) and an alignment mechanism (3). An inner network board (12) is installed in the box body (1). A set-top box main body (15) and an intelligent antenna array control system (16) are installed on the inner network board (12), and the set-top box main body (15) is connected to the intelligent antenna array control system (16). A cooling fan (2) is provided on the top (14) of the box body (1) opposite to the set-top box main body (15) and the intelligent antenna array control system (16). The alignment mechanism (3) is installed on the bottom (11) of the box body (1). The alignment mechanism (3) includes a plurality of support leg assemblies (31). The support leg assembly (31) includes a support rod (311), a first screw (312), a second screw (313), an expansion nail (314) and a limit screw tube (316). The first end of the support rod (311) is rotatably connected to the bottom (11) of the box body, and the second end of the support rod (311) is coaxially connected to the first end of the first screw (312). The first end of the second screw (313) is hinged to the second end of the first screw (312), and the second screw (313) can be coaxial with the first screw (312). The second end of the second screw (313) is coaxially connected to the expansion nail (314). The limit screw tube (316) is screwed to the first screw (312) and can also be screwed to the second screw (313).

2. The digital network set-top box with anti-interference function according to claim 1, wherein: A receiving groove (31301) is provided at the second end of the second screw (313). The depth of the receiving groove (31301) is arranged along the axial direction of the second screw (313). A movable spreading plate (315) is provided in the receiving groove (31301). The expansion nail (314) includes two semi-cylinders (3141) arranged along the axial direction of the second screw (313). The two semi-cylinders (3141) are symmetrically arranged with the center line of the receiving groove (31301) as the axis, and the distance between the two semi-cylinders (3141) is less than the width of the receiving groove (31301). The first end of the spreading plate (315) is provided with a push rod located outside the receiving groove (31301), and the second end is provided with a guiding cone (3151). The larger diameter end of the guiding cone (3151) is connected to the spreading plate (315), and the smaller diameter end is located between the two semi-cylinders (3141).

3. The digital network set-top box with anti-interference function according to claim 2, wherein: A plurality of barbs (3142) are provided on the opposite sides of the two semi-cylinders (3141).

4. A digital network set-top box with an anti-interference function according to claim 2, characterized in that: The spreading plate (315) is slidably connected to the second screw (313) in the axial direction of the second screw (313).

5. A digital network set-top box with anti-interference function according to claim 2, characterized in that: A clamping groove (31601) is provided at the end of the limit screw tube (316) facing the spreading plate (315), and the push rod is used to be clamped into the clamping groove (31601).

6. A digital network set-top box with anti-interference function according to claim 2, characterized in that: The bottom of the box (11) is provided with a plurality of long through holes (102) corresponding to the plurality of support leg assemblies (31). The support leg assemblies (31) are arranged in the corresponding long through holes (102), and the support rod (311), the first screw (312), the second screw (313), the expansion nail (314) and the limit screw tube (316) are all arranged along the length direction of the long through hole (102).

7. A digital network set-top box with anti-interference function according to claim 6, characterized in that: The alignment mechanism (3) further includes a plurality of auxiliary drive components (32) corresponding to the plurality of support leg assemblies (31). The auxiliary drive components (32) are arranged between the bottom of the box (11) and the inner net plate (12). The auxiliary drive component (32) includes a lead screw (321), a nut (322) and a connecting rod (323). The lead screw (321) is arranged along the length direction of the long through hole (102) and is rotatably connected to the bottom of the box (11). The nut (322) is threadedly connected to the lead screw (321) and is also slidably connected to the bottom of the box (11). The connecting rod (323) is located in the long through hole (102), and one end thereof is hinged to the nut (322), and the other end is hinged to the second end of the corresponding first screw (312).

8. A digital network set-top box with anti-interference function according to claim 7, characterized in that: The alignment mechanism (3) further includes a driving gear (331) and a plurality of driven gears (332) corresponding to the plurality of lead screws (321). The driving gear (331) is rotatably connected to the bottom of the box (11), and one end thereof is connected to the box body (1) with a motor (333). The plurality of driven gears (332) are all meshed with the driving gear (331), and the driven gears (332) are coaxially connected to the corresponding lead screws (321).

9. A digital network set-top box with anti-interference function according to claim 1, characterized in that: A temperature control switch (20) connected to the cooling fan (2) is installed on the inner net plate (12).

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