Auxiliary dustproof heat dissipation type digital television
By setting up partitions and sealed heat dissipation mechanisms in the case of digital TVs, combined with dust brushing mechanisms, the problem of dust entering the inside of the TVs is solved, and efficient heat dissipation and extended life of electronic components are achieved.
Patent Information
- Application Number
- CN202510218919.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-05-16
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When used, existing digital TVs cannot ensure the efficiency and effect of heat dissipation, while preventing dust from entering the TV, resulting in a shortening of the life of electronic components.
An auxiliary dust insulation and cooling digital TV is designed. By setting a partition in the case, it is divided into two areas, and air outlets penetrate through both sides are set on the partition, combining a sealed heat dissipation mechanism and a dust brushing mechanism to achieve dust isolation and efficient heat dissipation of electronic components.
Effectively isolate dust, prevent it from entering the electronic component area, extend the service life of the electronic component, and achieve efficient heat dissipation effect, avoiding the service life of the electronic component due to excessive temperature.
Smart Images
Figure CN120017778A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of digital televisions, in particular to an auxiliary dust-proof and heat-dissipating digital television. Background Art
[0002] Analog TV signals are susceptible to various interferences during transmission. In addition, analog TV occupies a wide frequency band, and the number of channels that can be transmitted is limited under limited spectrum resources, which cannot meet people's demand for rich program content. The maturity of digital signal processing technology makes it possible to efficiently encode, decode, compress and restore audio and video signals, which can improve signal transmission quality and storage efficiency. The advancement of large-scale integrated circuit technology has enabled the integration of various complex signal processing and control functions required for digital television on smaller chips, reducing costs, improving reliability and stability, and laying the foundation for the large-scale production and popularization of digital televisions. The existing digital televisions still have the following technical problems when in use, such as: When using an existing digital TV, in order to facilitate the heat dissipation of electronic components, heat dissipation holes are opened on the TV for the exchange of air inside and outside the TV. In addition, in order to accelerate the efficiency of the air exchange between the inside and outside of the TV, an exhaust fan is generally installed inside the TV. Although this method can achieve a certain heat dissipation effect, it will also cause a large amount of dust to enter the inside of the TV, thereby affecting the life of the electronic components. In addition, although a filter can be set at the heat dissipation hole to reduce the possibility of dust entering the interior of the TV, as the use time increases, a large amount of dust will accumulate on the filter, which will cause the heat dissipation hole to be blocked, so that the heat dissipation effect is gradually reduced, and the life of the electronic components will be affected; Therefore, a digital television with auxiliary dust isolation and heat dissipation is needed to solve the above problems. Summary of the invention
[0003] The purpose of the present invention is to provide an auxiliary dust-proof and heat-dissipating digital television to solve the problem raised in the above background technology that the existing digital televisions cannot ensure the heat dissipation efficiency and effect while ensuring that dust will not enter the interior of the television, thereby failing to ensure the service life of the electronic components inside the television.
[0004] To achieve the above object, the present invention provides the following technical solutions: An auxiliary dust-proof and heat-dissipating digital television comprises a casing and a display screen installed on the front side of the casing, a back panel connected to the display screen is also installed inside the casing, a partition is provided inside the casing for dividing the casing into two areas, and air vents 1 and 2 are provided on the partition that pass through the two sides, the ends of the air vents 1 and 2 facing the rear side of the casing are connected by a sealed heat dissipation mechanism, and a dust brushing mechanism is connected to the sealed heat dissipation mechanism for brushing away dust accumulated on the sealed heat dissipation mechanism, a detachable cover is installed on the rear side of the casing, and an exhaust port is provided on the detachable cover.
[0005] Preferably, the sealed heat dissipation mechanism includes a motor frame installed on the inner side of the casing, and the motor frame is arranged in the area between the partition and the display screen, a servo motor is installed on the motor frame, and the shaft end of the servo motor is coaxially fixedly connected with one end of the transmission shaft, the other end of the transmission shaft extends into the tuyere 2 coaxial with it, and the transmission shaft bearing is arranged through the support frame, the support frame is supported on the inner side of the tuyere 2, and the part of the transmission shaft arranged in the tuyere 2 is provided with a heat dissipation fan blade, and the ends of the tuyere 1 and the tuyere 2 facing the rear side of the casing are both through-connected with a heat dissipation fan. Copper tube, and two heat dissipation copper tubes are connected through a support cover, the support cover is fixedly connected to the side of the partition facing the rear side of the casing, the casing is provided with air holes, and the air holes are provided on the casing in the area between the partition and the removable cover, for gas exchange between the inside and outside of the casing, a follower shaft is sealably connected through a bearing on the support cover, the follower shaft is coaxially arranged with the support cover, and the inner end bearing of the follower shaft is connected to the partition, a pneumatic fan blade is provided on the follower shaft part in the support cover, and the outer end of the follower shaft extends into the exhaust port, and an exhaust fan blade is provided on the outer end of the follower shaft.
[0006] Preferably, the area between the partition and the display screen is a sealed space, and the back plate is arranged in the sealed space, a circuit board is arranged on the back plate, and the servo motor is connected to the circuit board through a wire.
[0007] Preferably, the heat dissipation copper tube is configured to be S-shaped, so as to increase the distance of gas transport between tuyere 1 and tuyere 2 and increase the surface area of the heat dissipation copper tube, thereby facilitating improving the heat dissipation effect.
[0008] Preferably, the inner diameters of tuyere 1 and tuyere 2 are equal, and the inner diameters of tuyere 1 and tuyere 2 are not less than 5 times the inner diameter of the heat dissipation copper tube, so as to increase the flow rate of the gas sprayed into the interior of the support cover.
[0009] Preferably, the dust brush mechanism includes a limit rod arranged in the area between the partition and the removable cover, the two limit rods are arranged parallel to each other, and the two limit rods are respectively horizontally installed at the upper and lower ends of the casing, each of the limit rods is movably sleeved with a twisted threaded rod, and the outer side of each twisted threaded rod is threadedly connected with a driving tube, both ends of each driving tube are supported on the inner side of the casing through a mounting block, and the two driving tubes are respectively threaded through the two ends of the brush plate, two brush plates are provided, and the two brush plates are symmetrically arranged about the mid-vertical line of the driving tube, and both ends of the middle part of the casing are installed The outer end of the pressure-bearing rod is arranged toward the follower shaft, and the follower shaft is arranged on the part outside the support cover and is connected with the cam through a ratchet and pawl mechanism, the cam is nested on the outer side of the follower shaft, and the cam bearing is connected to the outer side of the support cover, a guide wheel assembly is arranged on the inner side of the housing, and a pull rope is guided on the guide wheel assembly, and the two ends of each pull rope are respectively connected to one end of the corresponding twisted threaded rod and the inner end of the corresponding pressure-bearing rod, and a spring is arranged between the inner end of the pressure-bearing rod and the open end of the corresponding mounting tube.
[0010] Preferably, the twisted threaded rod is provided with square through holes penetrating both ends thereof, and the cross section of the square through holes matches the cross section of the limiting rod, so as to limit the twisted threaded rod and prevent it from rotating.
[0011] Preferably, the inner side of the drive tube is provided with a twisted thread that matches the outer side of the twisted threaded rod, and the length of the drive tube is less than the length of the limiting rod. The outer side of each drive tube is provided with threads symmetrical about the vertical line therein, which are used to move the two brush plates closer to each other, or away from each other.
[0012] Preferably, the mounting tube is provided with through holes on both sides thereof on the end portion close to the inner side of the casing, which are used to be penetrated by the corresponding pull rope and to be used to install part of the guide wheel assembly. There are eight guide wheel assemblies, with each two forming a group. There are four pull ropes, and each pull rope is C-shaped.
[0013] Preferably, the pressure-bearing rod is of a T-shaped structure, so that its inner end can support the spring, and the outer end of the pressure-bearing rod is hemispherical, and the position of the pressure-bearing rod corresponds to the position of the cam.
[0014] Compared with the prior art, the invention has the following beneficial effects: the auxiliary dust-isolating and heat-dissipating digital television can isolate dust and prevent dust from entering the area where electronic components are arranged in the casing, thereby preventing the service life of the electronic components from being affected by dust, and can also facilitate heat dissipation of the electronic components to prevent the service life of the electronic components from being affected by excessively high temperatures: 1. The housing can be divided into two areas by the partition. The area between the partition and the display screen is a sealed area, which can be used to install the back panel with electronic components, thereby preventing dust from entering the sealed area, ensuring that the service life of the electronic components will not be affected by dust; 2. By driving the heat dissipation fan blades to rotate through the air outlet 1 and the air outlet 2 and the forward rotation of the servo motor, the air in the sealed area can flow in the pipeline formed by the heat dissipation copper tube and the support cover, and then the heat dissipation copper tube is used to make the air in the sealed area exchange heat with the outside air, so as to achieve the purpose of cooling the air in the sealed area. In this process, due to the flow of gas, the pneumatic fan blades will drive the follower shaft to rotate, and then drive the exhaust fan blades to rotate, so as to improve the efficiency of the exchange between the air in the area between the partition and the removable cover and the outside air, so as to help further improve the effect and efficiency of cooling the air in the sealed area; 3. When the servo motor rotates in reverse and drives the heat dissipation fan blades to rotate in the opposite direction, the air in the sealed area can also flow in the pipeline formed by the heat dissipation copper tube and the support cover, and the exhaust fan blades can also be driven to rotate through the follower shaft, thereby cooling the air in the sealed area. Moreover, during the reversal of the servo motor, the follower shaft will also reverse, so the cam can be driven to rotate through the ratchet pawl mechanism. During the rotation of the cam, the pressure rods at different positions can be repeatedly squeezed. Through the cooperation of the spring, the pull rope can pull the twisted threaded rod to move back and forth, thereby driving the drive tube to rotate back and forth. During the reciprocating rotation of the drive tube, the two brush plates will be driven to brush away the dust adsorbed on the heat dissipation copper tube, so as to avoid excessive dust accumulation on the heat dissipation copper tube after long-term use, thereby affecting the heat dissipation efficiency and effect of the heat dissipation copper tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the rear view of the internal structure of the casing of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of point A; Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure of point B in the middle; Figure 7 It is a schematic diagram of the cross-sectional connection structure of the driving tube and the limiting rod of the present invention; Figure 8 For the present invention Figure 7 The schematic diagram of the enlarged structure of point C in the middle; Fig. 9 It is a schematic diagram of a partial cross-sectional structure of a partition of the present invention; Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point D.
[0016] In the figure: 1. casing; 2. display screen; 3. air vent; 4. removable cover; 5. exhaust port; 6. exhaust fan blades; 7. mounting tube; 8. pressure rod; 9. heat dissipation copper tube; 10. drive tube; 11. mounting block; 12. twisted threaded rod; 13. limit rod; 14. brush plate; 15. support cover; 16. cam; 17. pull rope; 18. guide wheel assembly; 19. spring; 20. partition; 21. back plate; 22. follower shaft; 23. pneumatic fan blades; 24. ratchet and pawl mechanism; 25. air outlet one; 26. motor frame; 27. servo motor; 28. transmission shaft; 29. air outlet two; 30. support frame; 31. heat dissipation fan blades. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problem that previous digital televisions cannot ensure that dust does not enter the interior of the television and affect the service life of electronic components under the premise of ensuring heat dissipation effect and efficiency, the following technical solution is provided, specifically, an auxiliary dust-proof and heat-dissipating digital television, including a casing 1 and a display screen 2 installed on the front side of the casing 1, and a back panel 21 connected to the display screen 2 is also installed inside the casing 1. A partition 20 is arranged inside the casing 1 for dividing the casing 1 into two areas, and the partition 20 is provided with air vents 1 25 and air vents 29 passing through both sides thereof, and the ends of the air vents 1 25 and the air vents 29 facing the rear side of the casing 1 are connected by a sealed heat dissipation mechanism, and a removable cover 4 is installed on the rear side of the casing 1, and an exhaust port 5 is arranged on the removable cover 4.
[0019] The sealed heat dissipation mechanism includes a motor frame 26 installed on the inner side of the casing 1, and the motor frame 26 is arranged in the area between the partition 20 and the display screen 2. A servo motor 27 is installed on the motor frame 26, and the shaft end of the servo motor 27 is coaxially fixedly connected to one end of a transmission shaft 28, and the other end of the transmission shaft 28 extends into the tuyere 2 29 coaxial therewith, and the bearing of the transmission shaft 28 passes through the support frame 30, and the support frame 30 is supported on the inner side of the tuyere 29. A heat dissipation fan blade 31 is arranged on the part of the transmission shaft 28 arranged in the tuyere 29, and the ends of the tuyere 1 25 and the tuyere 2 29 facing the rear side of the casing 1 are both connected through a heat dissipation copper tube 9, and the two heat dissipation copper tubes 9 are connected through a support cover 15, and the support cover 15 is fixedly connected to the partition 20 facing the rear side of the casing 1. On one side of the rear side of the casing 1, an air vent 3 is provided on the casing 1, and the air vent 3 is provided on the casing 1 in the area between the partition 20 and the removable cover 4, for gas exchange between the inside and outside of the casing 1, a follower shaft 22 is sealably connected through the bearing on the support cover 15, the follower shaft 22 is coaxially arranged with the support cover 15, and the inner end bearing of the follower shaft 22 is connected to the partition 20, a pneumatic fan blade 23 is provided on the follower shaft 22 part in the support cover 15, and the outer end of the follower shaft 22 extends into the exhaust port 5, and an exhaust fan blade 6 is provided on the outer end of the follower shaft 22. When in use, the servo motor 27 is started, and the servo motor 27 drives the transmission shaft 28 to rotate forward, thereby driving the heat dissipation fan blade 31 to rotate forward, at this time, the air between the display screen 2 and the partition 20 will be exhausted by the air outlet 23. 29 enters the first heat dissipation copper tube 9, then passes through the support cover 15, enters the second heat dissipation copper tube 9, and finally returns to the display screen 2 and the partition 20 through the air outlet 1 25. During this process, the heat dissipation copper tube 9 absorbs the heat contained in the flowing air inside it and exchanges heat with the outside air, so that the air between the display screen 2 and the partition 20 can be cooled. In addition, when the air enters the support cover 15 through the first heat dissipation copper tube 9, due to the ratio of the inner diameter of the heat dissipation copper tube 9 to the air outlet 29, the air enters the support cover 15 at a faster speed, thereby blowing the pneumatic fan blades 23 in the support cover 15 to rotate, and then the follower shaft 22 can be driven to rotate. During the rotation of the follower shaft 22, the exhaust fan blades 6 will be driven to rotate, so as to cooperate with the through hole 25. The air hole 3 improves the efficiency and effect of heat exchange of the heat dissipation copper tube 9, which helps to improve the efficiency and effect of cooling the air between the display screen 2 and the partition 20. In the above process, since the area between the display screen 2 and the partition 20 is a sealed area, dust can be prevented from entering, and the heat dissipation of the internal electronic components can be not affected. Therefore, under the premise of ensuring the heat dissipation effect and efficiency, dust can be ensured not to enter the interior of the TV and affect the service life of the electronic components. The area between the partition 20 and the display screen 2 is a sealed space, and the back plate 21 is arranged in the sealed space. A circuit board is arranged on the back plate 21, and the servo motor 27 is connected to the circuit board through a wire. The heat dissipation copper tube 9 is arranged in an S shape, which is convenient for increasing the distance of gas transportation between the air outlet 1 25 and the air outlet 2 29.The surface area of the heat dissipation copper tube 9 is increased, which is beneficial to improve the heat dissipation effect. The inner diameters of the tuyere 1 25 and the tuyere 2 29 are equal, and the inner diameters of the tuyere 1 25 and the tuyere 2 29 are not less than 5 times the inner diameter of the heat dissipation copper tube 9, which is used to increase the flow rate of the gas sprayed into the support cover 15.
[0020] Embodiment 2: The digital television in this embodiment, based on Embodiment 1, can utilize the reverse rotation of the servo motor 27 to brush off the dust on the heat dissipation copper tube 9 to prevent excessive dust accumulation from affecting the heat dissipation efficiency and effect of the heat dissipation copper tube 9. Specifically, a dust brushing mechanism is connected to the sealed heat dissipation mechanism to brush off the dust accumulated on the sealed heat dissipation mechanism.
[0021] The dust brushing mechanism includes a limiting rod 13 arranged in the area between the partition 20 and the removable cover 4, the two limiting rods 13 are arranged parallel to each other, and the two limiting rods 13 are respectively horizontally installed at the upper and lower ends of the casing 1, each limiting rod 13 is movably sleeved with a twisted threaded rod 12, and the outer side of each twisted threaded rod 12 is threadedly connected with a driving tube 10, both ends of each driving tube 10 are supported on the inner side of the casing 1 through a mounting block 11, and the two driving tubes 10 are respectively threaded through the two ends of a brush plate 14, two brush plates 14 are provided, and the two brush plates 14 are symmetrically arranged about the mid-vertical line of the driving tube 10, both ends of the middle part of the casing 1 are installed with mounting tubes 7, and the open ends of the two mounting tubes 7 are movably extended into the inner end of the pressure-bearing rod 8, and the outer end of the pressure-bearing rod 8 faces along A driving shaft 22 is provided, and the follower shaft 22 is provided on the part outside the support cover 15 and is connected to the cam 16 through a ratchet pawl mechanism 24. The cam 16 is nested on the outside of the follower shaft 22, and the cam 16 bearing is connected to the outside of the support cover 15. A guide wheel assembly 18 is provided on the inner side of the casing 1, and a pull rope 17 is guided on the guide wheel assembly 18. The two ends of each pull rope 17 are respectively connected to one end of the corresponding twisted threaded rod 12 and the inner end of the corresponding pressure-bearing rod 8, and a spring 19 is provided between the inner end of the pressure-bearing rod 8 and the open end of the corresponding mounting tube 7. When in use, it is necessary to control the servo motor 27 to rotate in the reverse direction. When the servo motor 27 rotates in the reverse direction, it can also cool the air between the display screen 2 and the partition 20. At the same time, the reversal of the servo motor 27 will make the follower The movable shaft 22 rotates in the opposite direction, and then the cam 16 can be driven to rotate through the ratchet pawl mechanism 24. During the rotation process, the cam 16 will repeatedly squeeze the pressure rod 8 at different positions, and cooperate with the spring 19 to enable the pull rope 17 to drive the twisted threaded rod 12 to move back and forth. During the reciprocating movement of the twisted threaded rod 12, the driving tube 10 is driven to rotate back and forth, so that the brush plate 14 moves back and forth, and then the dust accumulated on the heat dissipation copper tube 9 can be brushed off to avoid the heat dissipation efficiency and effect of the heat dissipation copper tube 9 being reduced due to dust. The twisted threaded rod 12 is provided with square through holes running through both ends thereof, and the cross section of the square through hole is consistent with the cross section of the limit rod 13, which is used to limit the twisted threaded rod 12 to prevent it from rotating. The inner side of the driving tube 10 is provided with a The outer side of the rod 12 is matched with a twisted thread, and the length of the drive tube 10 is less than the length of the limit rod 13. The outer side of each drive tube 10 is provided with a thread symmetrical about the vertical line therein, which is used to move the two brush plates 14 closer to each other or away from each other. The end of the mounting tube 7 close to the inner side of the casing 1 is provided with a through hole passing through both sides thereof, which is used to be penetrated by the corresponding pull rope 17 and to install a part of the guide wheel assembly 18. There are eight guide wheel assemblies 18, each two forming a group. There are four pull ropes 17, and each pull rope 17 is C-shaped. The pressure rod 8 is a T-shaped structure, which is convenient for its inner end to support the spring 19, and the outer end of the pressure rod 8 is hemispherical, and the position of the pressure rod 8 corresponds to the position of the cam 16.
[0022] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An auxiliary dust-proof and heat-dissipating digital television, comprising a housing (1) and a display screen (2) mounted on the front side of the housing (1), wherein a back panel (21) connected to the display screen (2) is also mounted inside the housing (1), characterized in that: A partition (20) is provided inside the casing (1) for dividing the casing (1) into two areas, and a first air vent (25) and a second air vent (29) are provided on the partition (20) and pass through the two sides thereof, and the ends of the first air vent (25) and the second air vent (29) facing the rear side of the casing (1) are connected via a sealed heat dissipation mechanism, and a dust brushing mechanism is connected to the sealed heat dissipation mechanism for brushing away dust accumulated on the sealed heat dissipation mechanism, and a detachable cover (4) is installed on the rear side of the casing (1), and an exhaust port (5) is provided on the detachable cover (4).
2. The auxiliary dust-proof and heat-dissipating digital television set according to claim 1, characterized in that: The sealed heat dissipation mechanism comprises a motor frame (26) mounted on the inner side of the casing (1), and the motor frame (26) is arranged in the area between the partition (20) and the display screen (2), a servo motor (27) is mounted on the motor frame (26), and the shaft end of the servo motor (27) is coaxially fixedly connected to one end of a transmission shaft (28), the other end of the transmission shaft (28) extends into a coaxial air outlet (29), and a bearing of the transmission shaft (28) passes through a support frame (30), the support frame (30) is supported on the inner side of the air outlet (29), a heat dissipation fan blade (31) is arranged on the part of the transmission shaft (28) arranged in the air outlet (29), and the ends of the air outlet (25) and the air outlet (29) facing the rear side of the casing (1) are both connected through a heat dissipation copper tube (9), and the two ends are connected through a heat dissipation copper tube (9). The heat dissipation copper tubes (9) are connected to each other through a support cover (15). The support cover (15) is fixedly connected to a side of the partition (20) facing the rear side of the casing (1). The casing (1) is provided with an air vent (3), and the air vent (3) is provided on the casing (1) in the area between the partition (20) and the removable cover (4) for gas exchange between the inside and outside of the casing (1). A follower shaft (22) is sealably connected to a bearing extending through the support cover (15). The follower shaft (22) is coaxially arranged with the support cover (15), and the inner end bearing of the follower shaft (22) is connected to the partition (20). A pneumatic fan blade (23) is provided on the follower shaft (22) in the support cover (15), and the outer end of the follower shaft (22) extends into the exhaust port (5). An exhaust fan blade (6) is provided on the outer end of the follower shaft (22).
3. The auxiliary dust-proof and heat-dissipating digital television set according to claim 2, characterized in that: The area between the partition plate (20) and the display screen (2) is a sealed space, and the back plate (21) is arranged in the sealed space. A circuit board is arranged on the back plate (21), and the servo motor (27) is connected to the circuit board via a wire.
4. The auxiliary dust-proof and heat-dissipating digital television set according to claim 3, characterized in that: The heat dissipation copper tube (9) is configured in an S shape, which facilitates increasing the distance of gas transport between the first tuyere (25) and the second tuyere (29), and increases the surface area of the heat dissipation copper tube (9), thereby facilitating improving the heat dissipation effect.
5. The auxiliary dust-proof and heat-dissipating digital television set according to claim 4, characterized in that: The inner diameters of the tuyere 1 (25) and tuyere 2 (29) are equal, and the inner diameters of the tuyere 1 (25) and tuyere 2 (29) are not less than 5 times the inner diameter of the heat dissipation copper tube (9), so as to increase the flow rate of the gas sprayed into the interior of the support cover (15).
6. The auxiliary dust-proof and heat-dissipating digital television set according to claim 5, characterized in that: The dust brushing mechanism comprises a limit rod (13) arranged in the area between the partition (20) and the removable cover (4), the two limit rods (13) are arranged parallel to each other, and the two limit rods (13) are respectively installed horizontally at the upper and lower ends of the casing (1), each of the limit rods (13) is movably sleeved with a twisted threaded rod (12), and the outer side of each twisted threaded rod (12) is threadedly connected to a drive tube (10), both ends of each drive tube (10) are supported on the inner side of the casing (1) through a mounting block (11), and the two drive tubes (10) are respectively threadedly penetrated through the two ends of a brush plate (14), two brush plates (14) are provided, and the two brush plates (14) are symmetrically arranged about the mid-vertical line of the drive tube (10), and mounting tubes (7) are installed at both ends of the middle part of the casing (1), and The open ends of the two mounting tubes (7) are movably extended into the inner ends of the pressure-bearing rods (8), the outer ends of the pressure-bearing rods (8) are arranged toward the follower shaft (22), and the follower shaft (22) is arranged on the part outside the support cover (15) and is connected to the cam (16) through a ratchet and pawl mechanism (24), the cam (16) is nested on the outer side of the follower shaft (22), and the cam (16) bearing is connected to the outer side of the support cover (15), a guide wheel assembly (18) is arranged on the inner side of the housing (1), and a pull rope (17) is guided on the guide wheel assembly (18), and the two ends of each pull rope (17) are respectively connected to one end of the corresponding twisted threaded rod (12) and the inner end of the corresponding pressure-bearing rod (8), and a spring (19) is arranged between the inner end of the pressure-bearing rod (8) and the open end of the corresponding mounting tube (7).
7. The auxiliary dust-proof and heat-dissipating digital television set according to claim 6, characterized in that: The twisted threaded rod (12) is provided with square through holes penetrating both ends thereof, and the cross-section of the square through holes matches the cross-section of the limiting rod (13), so as to limit the twisted threaded rod (12) and prevent it from rotating.
8. The auxiliary dust-proof and heat-dissipating digital television set according to claim 7, characterized in that: The inner side of the drive tube (10) is provided with a twisted thread that matches the outer side of the twisted thread rod (12), and the length of the drive tube (10) is less than the length of the limit rod (13). The outer side of each drive tube (10) is provided with a thread that is symmetrical about a vertical line therein, so as to enable the two brush plates (14) to move toward each other or away from each other.
9. The auxiliary dust-proof and heat-dissipating digital television set according to claim 8, characterized in that: The mounting tube (7) is provided with a through hole extending through both sides thereof at an end portion close to the inner side of the housing (1), for being penetrated by a corresponding pull rope (17) and for mounting a portion of a guide wheel assembly (18). The guide wheel assemblies (18) are provided with eight, two of each forming a group. The pull ropes (17) are provided with four, and each of the pull ropes (17) is in the shape of a C.
10. The auxiliary dust-proof and heat-dissipating digital television set according to claim 9, characterized in that: The pressure-bearing rod (8) is of a T-shaped structure, so that its inner end can support the spring (19), and the outer end of the pressure-bearing rod (8) is hemispherical, and the position of the pressure-bearing rod (8) corresponds to the position of the cam (16).