Modularized upgradable set top box

The modular design of the disassembly, heat dissipation, and fixing mechanisms solves the problem of inconvenient shell disassembly during set-top box upgrades, enabling quick assembly and disassembly and stable connection, thus improving the convenience and practicality of the equipment.

CN121665045APending Publication Date: 2026-03-13SHENZHEN YUEXINTONG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-29
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

During the upgrade process of existing set-top boxes, the outer casing is not easy to disassemble quickly, which increases the workload of staff, and the traditional replacement method increases the cost of use and generates electronic waste.

Method used

A modular and upgradeable set-top box was designed, employing a disassembly mechanism, a heat dissipation mechanism, and a fixing mechanism. The connecting plate is moved by a lever, enabling quick disassembly and fixing of the cover plate. Dust is removed by a cooling fan and a motor-driven cleaning roller, ensuring heat dissipation and dust prevention. A rotating rod drives a bevel gear to mesh, achieving a stable connection of the modules.

Benefits of technology

It enables quick assembly and disassembly of the set-top box module, reducing the workload of staff, improving the convenience and practicality of the equipment, and avoiding problems such as dust blockage and poor contact.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of household set top boxes, and discloses a modular upgradable set top box which comprises a shell, a dismounting mechanism comprises a cover plate, the cover plate is arranged at the top of the shell, a hollow pipe is fixedly connected to the inner side of the cover plate, springs are fixedly connected to the left side and the right side of the interior of the hollow pipe, and the springs are fixedly connected to the left side and the right side of the interior of the hollow pipe. Movable columns are fixedly connected to the ends, away from each other, of the two springs, connecting plates are fixedly connected to the ends, away from each other, of the two movable columns, first ratchet plates are fixedly connected to the sides, away from each other, of the two connecting plates, and grooves are formed in the left side and the right side of the top end of the interior of the shell; a second ratchet plate is fixedly connected to the front side of the interior of the groove. The connecting plate is driven by the shifting block to move, so that the first ratchet plates on the two sides are separated from the second ratchet plates, and the cover plate is pushed backwards, so that the cover plate can be easily detached, and modules in the set top box can be replaced and upgraded.
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Description

Technical Field

[0001] This invention relates to the field of home set-top box technology, and in particular to a modular and upgradeable set-top box. Background Technology

[0002] A set-top box is a device that connects a television to an external signal source. It is also known as a digital video converter. It can decode, convert, and process signals from cable television networks, satellite, and the Internet, enabling ordinary televisions to receive and play digital television programs, high-definition videos, and online streaming media.

[0003] As a home multimedia terminal device, the hardware performance of set-top boxes directly affects the user experience. With the popularization of 4K / 8K video, cloud gaming and various high-bandwidth applications, traditional fixed-configuration set-top boxes are facing performance bottlenecks. At this time, it is necessary to upgrade the set-top box to meet the high bandwidth requirements.

[0004] Currently, the industry generally adopts the method of replacing the entire set-top box in home set-top box upgrades, replacing it with a high-performance set-top box to meet performance requirements. This not only increases the user's operating costs but also generates a large amount of electronic waste. To solve the above problems, existing technologies upgrade home set-top boxes by replacing internal hardware, thus avoiding the need for a complete set-top box replacement. However, during the set-top box upgrade process, due to the large number of internal devices and complex circuits, professional personnel are required to replace them, which is not conducive to convenient replacement scenarios. Existing technologies use plug-in modules to enable quick plug connections when replacing internal devices in the set-top box, thereby lowering the threshold for internal device replacement. However, when using this device, the set-top box shell is tightly sealed, making it inconvenient for personnel to quickly disassemble it, increasing the workload of personnel and failing to meet the needs of users. Summary of the Invention

[0005] The purpose of this invention is to provide a modular and upgradeable set-top box, which solves the problem of the inconvenience of quickly disassembling the set-top box shell during the upgrade process.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A modular upgradeable set-top box includes a housing, a disassembly mechanism on the top of the housing for quick disassembly and assembly of upgrade modules, a heat dissipation mechanism on the rear of the housing for heat dissipation of the set-top box, and a fixing mechanism on the inner side of the housing for fixing the upgrade modules. The disassembly mechanism includes a cover plate, which is disposed on the top of the outer casing. A hollow tube is fixedly connected to the inner side of the cover plate. Springs are fixedly connected to the left and right sides of the inner side of the hollow tube. Movable columns are fixedly connected to the opposite ends of the two springs. Connecting plates are fixedly connected to the opposite ends of the two movable columns. First ratchet plates are fixedly connected to the opposite sides of the two connecting plates. Grooves are provided on the left and right sides of the inner top of the outer casing. A second ratchet plate is fixedly connected to the front side of the inner side of the groove. The second ratchet plate is engaged with the first ratchet plate. A control component is provided on the front side of the top of the cover plate.

[0007] Preferably, the heat dissipation mechanism includes a hollow plate, which is fixedly connected to the rear side of the outer casing. A filter screen is fixedly connected to the front inner side of the hollow plate. A motor is fixedly connected to the top left side of the hollow plate. The output end of the motor passes through the hollow plate and is fixedly connected to a threaded rod. A movable block is threadedly connected to the outer side of the threaded rod. A support rod is rotatably connected to the bottom of the movable block. A cleaning roller is fixedly connected to the outer side of the support rod. A drive assembly is provided on the inner side of the hollow plate. A ventilation assembly is provided at the top center of the cover plate.

[0008] Preferably, the fixing mechanism includes concave plates, two concave plates are respectively disposed on the left and right sides inside the outer shell, a bidirectional threaded column is rotatably connected to the inner side of the concave plate, a slider is threadedly connected to the front and rear sides of the outer wall of the bidirectional threaded column, a connecting rod is rotatably connected to the inner side of the slider, a connecting seat is rotatably connected to one end of the connecting rod, a fixing clip is fixedly connected to one side of the connecting seat, and a transmission assembly is disposed on the rear side inside the outer shell.

[0009] Preferably, the control component includes a lever, which is fixedly connected to the top of the connecting plate. The top left and right sides of the cover plate are provided with through slots, and the top of the lever passes through the through slots.

[0010] Preferably, the drive assembly includes a spur gear, which is fixedly connected to the top of the cleaning roller, and a rack is fixedly connected to the upper rear side of the filter screen, with the spur gear meshing with the rack.

[0011] Preferably, the ventilation assembly includes a ventilation grille, which is disposed on the top of the cover plate, and a plurality of baffles are rotatably connected at equal intervals on the top of the ventilation grille.

[0012] Preferably, the transmission assembly includes a rotating rod rotatably connected to the rear right wall of the housing, the left end of the rotating rod penetrating the housing, and a driving bevel gear fixedly connected to both the left and right sides of the outer wall of the rotating rod. The rear end of the bidirectional threaded column penetrates the concave plate and is fixedly connected to a driven bevel gear, which meshes with the driving bevel gear.

[0013] Preferably, the heat dissipation mechanism further includes heat dissipation fans, two of which are fixedly connected to the left and right sides of the rear wall of the outer casing, and a collection groove is fixedly connected to the bottom inner side of the hollow plate.

[0014] Preferably, the heat dissipation mechanism further includes a sliding groove, which is formed on the inner top of the hollow plate, and the top of the movable block is slidably connected to the sliding groove.

[0015] Preferably, the fixing mechanism further includes guide rods, two of which are fixedly connected to the front and rear sides of the inner shell, and the bottom of the fixing clip is slidably connected to the guide rods.

[0016] In summary, the present invention has at least one of the following beneficial technical effects: 1. This invention uses a lever to move the connecting plate, causing the first ratchet plates on both sides to disengage from the second ratchet plates and push the cover plate backward, making it easy to remove the cover plate and replace or upgrade the modules inside the set-top box. Furthermore, the spring pushes the connecting plate through the movable column, causing the first ratchet plates to engage with the second ratchet plates, thereby fixing the cover plate. This reduces the workload of the staff and meets the needs of the users.

[0017] 2. This invention blows cool air into the set-top box through a cooling fan. The filter removes dust, and a motor drives a threaded rod to rotate, which in turn moves a movable block. The support rod then pushes the cleaning roller to move, and the flat gear moves accordingly. Because the rack meshes with the flat gear, the flat gear drives the cleaning roller to rotate, thus causing the cleaning roller to rotate and remove dust from the filter. This prevents the filter from being clogged by dust and improves the ease of use of the device.

[0018] 3. This invention drives the active bevel gear to rotate via a rotating rod, and through the meshing transmission between the driven bevel gear and the active bevel gear, drives the bidirectional threaded column to rotate, thereby driving the slider to move. The slider pushes the connecting seat to move through the connecting rod, and the fixing clips will move accordingly. The fixing clips on both sides will move towards the middle at the same time to fix the upgrade module, so that the upgrade module will not have poor contact, thus improving the practicality of the device. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a partial structural breakdown diagram of the present invention; Figure 4 This is a partial structural cross-sectional view of the disassembly mechanism of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6This is a partial structural cross-sectional view of the heat dissipation mechanism of the present invention; Figure 7 This is a partial structural cross-sectional view of the fixing mechanism of the present invention; Figure 8 This is a partial structural cross-sectional view of the present invention.

[0020] The components are as follows: 1. Outer shell; 2. Disassembly mechanism; 21. Cover plate; 22. Hollow tube; 23. Spring; 24. Movable column; 25. Connecting plate; 26. First ratchet plate; 27. Groove; 28. Second ratchet plate; 29. ​​Control assembly; 291. Pulley; 292. Penetration groove; 3. Heat dissipation mechanism; 31. Hollow plate; 32. Filter screen; 33. Motor; 34. Threaded rod; 35. Movable block; 36. Support rod; 37. Cleaning roller; 38. Drive assembly. Components; 381, spur gear; 382, ​​rack; 39, ventilation assembly; 391, ventilation grille; 392, baffle; 310, cooling fan; 311, collection trough; 312, slide groove; 4, fixing mechanism; 41, concave plate; 42, double-threaded column; 43, slider; 44, connecting rod; 45, connecting seat; 46, fixing clip; 47, transmission assembly; 471, driven bevel gear; 472, rotating rod; 473, driving bevel gear; 48, guide rod. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 The present invention will be further described in detail below.

[0022] The present invention provides a modular upgradeable set-top box, including a shell 1, a disassembly mechanism 2 is provided on the top of the shell 1 for quick disassembly and assembly of the upgrade module, a heat dissipation mechanism 3 is provided on the rear side of the shell 1 for heat dissipation of the set-top box, and a fixing mechanism 4 is provided on the inner side of the shell 1 for fixing the upgrade module. The disassembly mechanism 2 includes a cover plate 21, which is located on the top of the outer casing 1. A hollow tube 22 is fixedly connected to the inner side of the cover plate 21. Springs 23 are fixedly connected to both the left and right sides of the hollow tube 22. Movable columns 24 are fixedly connected to the opposite ends of the two springs 23. Connecting plates 25 are fixedly connected to the opposite ends of the two movable columns 24. The springs 23 can push the connecting plates 25 to move through the movable columns 24. A first ratchet plate 26 is fixedly connected to the opposite side of the two connecting plates 25. The inner top of the outer casing 1... The cover plate 21 is fixedly connected to the front side of the inner side of the groove 27 with a second ratchet plate 28. The second ratchet plate 28 engages with the first ratchet plate 26 to fix the cover plate 21. A control component 29 is provided on the front side of the top of the cover plate 21. The control component 29 includes a lever 291. The lever 291 is fixedly connected to the top of the connecting plate 25. The top left and right sides of the top of the cover plate 21 are provided with through slots 292. The top of the lever 291 passes through the through slots 292. Moving the lever 291 can push the connecting plate 25 to move. Specifically, when a module upgrade of the set-top box is required, by moving the levers 291 on both sides of the top of the cover plate 21, the connecting plates 25 on both sides are moved, thereby disengaging the first ratchet plates 26 from the engagement with the second ratchet plates 28. Then, the cover plate 21 is pushed backward, making it easy to remove and upgrade the set-top box. After the upgrade is completed, the cover plate 21 is pushed forward, and the spring 23 will push the connecting plates 25 to move through the movable column 24, so that the first ratchet plates 26 and the second ratchet plates 28 are engaged, thereby ensuring that the cover plate 21 is firmly fixed in place, reducing the workload of the staff and meeting the needs of the users.

[0023] The heat dissipation mechanism 3 includes a hollow plate 31, which is fixedly connected to the rear side of the outer casing 1. A filter screen 32 is fixedly connected to the front side of the inner interior of the hollow plate 31. A motor 33 is fixedly connected to the top left side of the hollow plate 31. The output end of the motor 33 passes through the hollow plate 31 and is fixedly connected to a threaded rod 34. The motor 33 drives the threaded rod 34 to rotate. A movable block 35 is threadedly connected to the outer side of the threaded rod 34. A support rod 36 is rotatably connected to the bottom of the movable block 35. When the threaded rod 34 rotates, the movable block 35 drives the support rod 36 to move. A cleaning roller 37 is fixedly connected to the outer side of the support rod 36, and the support rod 36 drives the cleaning roller 37 to move. A drive assembly 38 is provided on the inner side of the hollow plate 31, and a ventilation assembly 39 is provided at the top center of the cover plate 21. The drive assembly 38 includes a spur gear 381, which is fixedly connected to the top of the cleaning roller 37. The cleaning roller 37 will drive the spur gear 381 to move. A rack 382 is fixedly connected to the upper rear side of the filter screen 32. The spur gear 381 and the rack 382 are meshed. When the spur gear 381 moves, it will drive the cleaning roller 37 to rotate. The heat dissipation mechanism 3 also includes a heat dissipation fan 310. Two heat dissipation fans 310 are fixedly connected to the left and right sides of the rear wall of the outer casing 1, respectively. A collection groove 311 is fixedly connected to the bottom inner side of the hollow plate 31. Specifically, when using this device, the cooling fan 310 blows cool air into the set-top box, effectively reducing the internal temperature and ensuring the device operates at a suitable temperature. Simultaneously, the filter 32 filters dust particles from the air, preventing dust from entering the set-top box and damaging electrical equipment. Furthermore, the motor 33 drives the threaded rod 34 to rotate, which in turn drives the movable block 35 to move. The movable block 35, through its connection with the support rod 36, pushes the cleaning roller 37 to move. During this movement, the cleaning roller 37 drives the spur gear 381 to move as well. Since the spur gear 381 meshes with the rack 382, ​​its movement causes the cleaning roller 37 to rotate, effectively removing dust from the filter 32 and preventing clogging due to dust accumulation, thus improving the device's ease of use.

[0024] The fixing mechanism 4 includes two concave plates 41, which are respectively disposed on the left and right sides of the interior of the outer casing 1. A bidirectional threaded post 42 is rotatably connected to the inner side of each concave plate 41. Slider blocks 43 are threadedly connected to the front and rear sides of the outer wall of the bidirectional threaded post 42. Rotation of the bidirectional threaded post 42 drives the sliders 43 to move. A connecting rod 44 is rotatably connected to the inner side of the sliders 43. A connecting seat 45 is rotatably connected to one end of the connecting rod 44. The slider 43 can push the connecting seat 45 to move via the connecting rod 44. A fixing clip 46 is fixedly connected to one side of the connecting seat 45. A fixing clip 46 is provided on the rear side of the interior of the outer casing 1. The transmission assembly 47 includes a rotating rod 472, which is rotatably connected to the rear right wall of the outer casing 1. The left end of the rotating rod 472 passes through the outer casing 1. Both the left and right sides of the outer wall of the rotating rod 472 are fixedly connected to the driving bevel gear 473. The rotating rod 472 will drive the driving bevel gear 473 to rotate. The rear end of the bidirectional threaded column 42 passes through the concave plate 41 and is fixedly connected to the driven bevel gear 471. The driven bevel gear 471 meshes with the driving bevel gear 473. When the driving bevel gear 473 rotates, the driven bevel gear 471 will drive the bidirectional threaded column 42 to rotate. Specifically, when using this device to upgrade a module, first connect the module to the plug, then rotate the rotating rod 472. The rotating rod 472 will drive the driving bevel gear 473 to rotate. Since the driven bevel gear 471 meshes with the driving bevel gear 473, the driven bevel gear 471 will also rotate, driving the bidirectional threaded column 42 to rotate. As the bidirectional threaded column 42 rotates, the slider 43 will move accordingly, and push the connecting seat 45 to move through the connecting rod 44. The movement of the connecting seat 45 will further push the fixing clip 46 to move. Since the bidirectional threaded columns 42 on both sides are set in opposite directions, the fixing clips 46 on both sides can move towards the middle at the same time, thereby fixing the upgrade module and preventing poor contact problems during use, thus improving the practicality of the device.

[0025] The ventilation assembly 39 includes a ventilation grille 391, which is disposed on the top of the cover plate 21. Multiple baffles 392 are rotatably connected at equal intervals on the top of the ventilation grille 391. The baffles 392 can prevent dust from entering the set-top box. The heat dissipation mechanism 3 also includes a slide 312, which is opened on the top inner side of the hollow plate 31. The top of the movable block 35 is slidably connected to the slide 312. Specifically, during heat dissipation, the air blown out by the cooling fan 310 can push the baffle 392 upward, and when the cooling fan 310 is not started, the baffle 392 can close the ventilation grille 391, and the slide groove 312 can limit the movement of the movable block 35.

[0026] The fixing mechanism 4 also includes guide rods 48, two guide rods 48 are fixedly connected to the front and rear sides of the inside of the housing 1 respectively, and the bottom of the fixing clip 46 is slidably connected to the guide rods 48; Specifically, the guide rod 48 can guide the movement of the fixing card 46, so that the fixing card 46 can fix the upgrade module.

[0027] Working principle: When the set-top box needs to be upgraded, the levers 291 on both sides of the top are moved. The levers 291 will drive the connecting plate 25 to move, thereby causing the first ratchet plate 26 on both sides to disengage from the second ratchet plate 28. Then, the cover plate 21 is pushed backward, and the cover plate 21 can be easily removed to upgrade the set-top box. When installing the cover plate 21, push the cover plate 21 forward. The spring 23 will push the connecting plate 25 through the movable column 24, thereby engaging the first ratchet plate 26 with the second ratchet plate 28, which can fix the cover plate 21. Furthermore, when using this device, the cooling fan 310 can blow cool air into the set-top box, and the filter 32 can filter out dust in the air, preventing dust from entering the set-top box and damaging the internal electrical equipment. The motor 33 drives the threaded rod 34 to rotate, thereby driving the movable block 35 to move. The movable block 35 pushes the cleaning roller 37 to move through the support rod 36. The cleaning roller 37 drives the flat gear 381 to move. Since the rack 382 meshes with the flat gear 381, when the flat gear 381 moves, it will drive the cleaning roller 37 to rotate. The cleaning roller 37 will then rotate to clean the dust off the filter 32, preventing the filter 32 from being clogged by dust. Finally, when using this device to upgrade the module, first connect the module and the plug, then rotate the rotating rod 472. The rotating rod 472 will drive the driving bevel gear 473 to rotate. Since the driven bevel gear 471 meshes with the driving bevel gear 473, the driven bevel gear 471 will drive the bidirectional threaded column 42 to rotate, thereby driving the slider 43 to move. When the slider 43 moves, it can push the connecting seat 45 to move through the connecting rod 44. The connecting seat 45 will then drive the fixing clip 46 to move. Since the bidirectional threaded columns 42 on both sides are set in opposite directions, the fixing clips 46 on both sides can fix the upgrade module, so that the upgrade module will not have poor contact.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular and upgradeable set-top box, comprising a housing (1), characterized in that, The top of the outer casing (1) is provided with a disassembly mechanism (2), which is used to facilitate the quick disassembly and assembly of the upgrade module. The rear side of the outer casing (1) is provided with a heat dissipation mechanism (3), which is used to facilitate the heat dissipation of the set-top box. The inner side of the outer casing (1) is provided with a fixing mechanism (4), which is used to facilitate the fixing of the upgrade module. The disassembly mechanism (2) includes a cover plate (21), which is located on the top of the outer shell (1). A hollow tube (22) is fixedly connected to the inner side of the cover plate (21). Springs (23) are fixedly connected to the left and right sides of the inner side of the hollow tube (22). Movable columns (24) are fixedly connected to the opposite ends of the two springs (23). Connecting plates (25) are fixedly connected to the opposite ends of the two movable columns (24). First ratchet plates (26) are fixedly connected to the opposite sides of the two connecting plates (25). Grooves (27) are provided on the left and right sides of the inner top of the outer shell (1). A second ratchet plate (28) is fixedly connected to the front side of the inner side of the groove (27). The second ratchet plate (28) meshes with the first ratchet plate (26). A control component (29) is provided on the front side of the top of the cover plate (21).

2. The modular and upgradeable set-top box according to claim 1, characterized in that, The heat dissipation mechanism (3) includes a hollow plate (31), which is fixedly connected to the rear side of the outer shell (1). A filter screen (32) is fixedly connected to the front side of the inner side of the hollow plate (31). A motor (33) is fixedly connected to the top left side of the hollow plate (31). The output end of the motor (33) passes through the hollow plate (31) and is fixedly connected to a threaded rod (34). A movable block (35) is threadedly connected to the outer side of the threaded rod (34). A support rod (36) is rotatably connected to the bottom of the movable block (35). A cleaning roller (37) is fixedly connected to the outer side of the support rod (36). A drive assembly (38) is provided on the inner side of the hollow plate (31). A ventilation assembly (39) is provided at the top center of the cover plate (21).

3. A modular and upgradeable set-top box according to claim 1, characterized in that, The fixing mechanism (4) includes a concave plate (41), and two concave plates (41) are respectively disposed on the left and right sides inside the outer shell (1). The inner side of the concave plate (41) is rotatably connected to a bidirectional threaded column (42). The outer wall of the bidirectional threaded column (42) is threaded with a slider (43) on both the front and rear sides. The inner side of the slider (43) is rotatably connected to a connecting rod (44). One end of the connecting rod (44) is rotatably connected to a connecting seat (45). One side of the connecting seat (45) is fixedly connected to a fixing clip (46). The inner rear side of the outer shell (1) is provided with a transmission assembly (47).

4. A modular and upgradeable set-top box according to claim 1, characterized in that, The control component (29) includes a toggle block (291), which is fixedly connected to the top of the connecting plate (25). The top left and right sides of the cover plate (21) are provided with through grooves (292), and the top of the toggle block (291) passes through the through grooves (292).

5. A modular and upgradeable set-top box according to claim 2, characterized in that, The drive assembly (38) includes a spur gear (381) which is fixedly connected to the top of the cleaning roller (37). A rack (382) is fixedly connected to the upper rear side of the filter screen (32). The spur gear (381) and the rack (382) are meshed together.

6. A modular and upgradeable set-top box according to claim 2, characterized in that, The ventilation assembly (39) includes a ventilation grille (391) disposed on the top of the cover plate (21), and a plurality of baffles (392) are rotatably connected at equal intervals on the top of the ventilation grille (391).

7. A modular and upgradeable set-top box according to claim 3, characterized in that, The transmission assembly (47) includes a rotating rod (472), which is rotatably connected to the rear right wall of the outer casing (1). The left end of the rotating rod (472) penetrates the outer casing (1). Both the left and right sides of the outer wall of the rotating rod (472) are fixedly connected to a driving bevel gear (473). The rear end of the bidirectional threaded column (42) penetrates the concave plate (41) and is fixedly connected to a driven bevel gear (471). The driven bevel gear (471) meshes with the driving bevel gear (473).

8. A modular and upgradeable set-top box according to claim 2, characterized in that, The heat dissipation mechanism (3) also includes a heat dissipation fan (310), and the two heat dissipation fans (310) are respectively fixedly connected to the left and right sides of the rear wall of the outer shell (1). A collection groove (311) is fixedly connected to the bottom of the inner side of the hollow plate (31).

9. A modular and upgradeable set-top box according to claim 2, characterized in that, The heat dissipation mechanism (3) also includes a slide groove (312), which is located on the top inner side of the hollow plate (31), and the top of the movable block (35) is slidably connected to the slide groove (312).

10. A modular and upgradeable set-top box according to claim 3, characterized in that, The fixing mechanism (4) also includes guide rods (48), two guide rods (48) are fixedly connected to the front and rear sides of the inner shell (1) respectively, and the bottom of the fixing clip (46) is slidably connected to the guide rods (48).