Mini host interface expansion device

Abstract

The invention relates to the technical field of host interface expansion equipment, and discloses mini host interface expansion equipment which comprises an equipment body, a rectangular groove is formed in the outer wall of one side of the equipment body, an exhaust fan is rotatably connected to the inner wall of the rectangular groove, and a plurality of Z-shaped grids are evenly and rotatably connected to the outer wall of the equipment body and located at an opening of the rectangular groove. The Z-shaped grilles are designed in an integral linkage mode, an auxiliary dust removal mechanism used for cleaning dust in gaps between every two adjacent Z-shaped grilles is arranged in a rectangular groove, the gaps, used for heat dissipation, between every two adjacent Z-shaped grilles can be prevented from being blocked by removing flocculent floating dust, and a good ventilation state can be kept; the exhaust fan can effectively dissipate heat, and equipment is prevented from being damaged due to overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of host interface expansion equipment, and in particular to a mini host interface expansion equipment. Background Art

[0002] Mini host interface expansion devices are external devices designed to increase the connection capacity of the mini host. Through these devices, users can connect more peripherals to the mini host, such as monitors, keyboards, mice, storage devices, network devices, etc. Common types include USB hubs, Thunderbolt docking stations, multi-function docking stations, and PCIe expansion boxes. When the mini host interface expansion device is inserted into a high-power device, it not only increases power consumption, but also causes the device to overheat if used for a long time.

[0003] In the prior art, the heat dissipation of the mini host interface expansion device is often carried out by fan exhaust, and the fan needs to be used in conjunction with the heat dissipation holes, which makes the overall sealing of the mini host interface expansion device not strong. Since the use environment of the mini host interface expansion device is mostly indoor corners, after long-term use, flocculent dust will enter the mini host interface expansion device through the heat dissipation holes, and some will adhere around the heat dissipation holes, causing the heat dissipation hole channels to be blocked, so that heat cannot be discharged in time, which will affect the performance of the mini host interface expansion device in the long run, and high temperature will cause damage to the internal components of the mini host interface expansion device, thereby reducing the service life of the device. Therefore, it is necessary to provide a mini host interface expansion device to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a mini host interface expansion device, which can effectively solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a mini host interface expansion device, including a device body, an outer wall of one side of the device body is provided with a rectangular groove, the inner wall of the rectangular groove is rotatably connected to an exhaust fan, the outer wall of the device body is evenly rotatably connected to a plurality of Z-shaped grilles located at the opening of the rectangular groove, the Z-shaped grilles are of an overall linkage design, and an auxiliary dust removal mechanism for cleaning dust in the gap between two adjacent Z-shaped grilles is arranged inside the rectangular groove.

[0006] As a further improvement of the above scheme, the auxiliary dust removal mechanism includes a first fixed frame fixedly connected to the inner wall of the top end of the equipment body, and the inner wall of the bottom end of the equipment body is also fixedly connected to a second fixed frame, the first fixed frame and the second fixed frame are both located inside the rectangular groove, and a rotating shaft is rotatably connected inside the first fixed frame and the second fixed frame, and two connecting belts are symmetrically connected between the outer walls of the two ends of the rotating shaft, a first gear is fixedly connected to the outer wall of the end of the rotating shaft, a supporting cross bar is fixedly connected between the outer walls of the top ends of the two connecting belts, and the outer wall of the support cross bar on the side away from the rotating shaft is rotatably connected to a rotating wheel, and a cleaning roller is fixedly connected to the outer wall on one side of the rotating wheel.

[0007] As a further improvement of the above solution, the outline shape of the rotating wheel is a truncated cone, the manufacturing material of the rotating wheel is rubber, and a plurality of rotating wheels are evenly arranged on the outer wall of the supporting cross bar, and the number of the rotating wheels is the same as that of the cleaning roller.

[0008] As a further improvement of the above solution, a spiral blade is rotatably connected to the bottom of the second fixing frame and located on one side of the rotating shaft. The spiral blade is fixedly connected to the second gear at one end close to the first gear, and the first gear is meshed with the second gear.

[0009] As a further improvement of the above scheme, an air inlet pipe is fixedly connected to the inner wall at the bottom end of the rectangular groove, and the opening of the air inlet pipe is located on one side of the exhaust fan. An air outlet pipe is fixedly connected to the outer wall of the air inlet pipe close to the spiral blade, and the air outlet pipe is connected to the inside of the air inlet pipe. The diameter of the air inlet pipe opening is larger than the diameter of the air outlet pipe opening.

[0010] As a further improvement of the above scheme, a collection box is inserted into the inner wall of the bottom of the rectangular groove and directly below the Z-shaped grid, a pressure plate is fixedly connected to the inner wall of the bottom end of the collection box, a first support spring is fixedly connected to the outer wall of the pressure plate, and a resistance plate is fixedly connected to the end of the first support spring away from the pressure plate.

[0011] As a further improvement of the above solution, the outer contour of the collection box is L-shaped, a plurality of first support springs are evenly arranged between the outer wall of the pressure plate and the outer wall of the resistance plate, and the surface of the resistance plate close to the exhaust fan is concave.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The use of multiple Z-shaped grilles that can be linked and flipped can not only avoid the damage caused by fingers accidentally touching the exhaust fan during use, but also ensure the overall aesthetics of the device body without affecting the heat dissipation effect. In addition, the angle formed by the gap between the two adjacently arranged Z-shaped grilles is not conducive to the passage of flocculent dust, thereby preventing the flocculent dust from entering the rectangular groove. Compared with the prior art, the heat dissipation state of the heat dissipation holes without obstruction can effectively reduce the probability of flocculent dust entering the device body. At the same time, under the interference effect of the rotating wheel and the Z-shaped grille, the linked and flipped Z-shaped grille can uniformly achieve the purpose of changing the air outlet angle. When the exhaust fan rotates at high speed, the flow of wind can be used to take away the heat, so that the exhausted hot air can be evenly diffused outside the Z-shaped grille, avoiding the exhaust heat from accumulating outside the Z-shaped grille, thereby achieving the purpose of improving air circulation.

[0014] In addition, the airflow is accelerated by the air inlet and the air outlet, and the phenomenon that the airflow velocity increases when it flows from the air inlet with a large aperture into the air outlet with a small aperture is utilized, so that the wind blown out through the air outlet can make the spiral blade and the second gear rotate, and under the meshing action of the second gear and the first gear, the supporting cross bar can finally move from top to bottom in the gap between two adjacent Z-shaped grilles with the rotating wheel and the cleaning roller, and the flocculent floating dust in the gap between two adjacent Z-shaped grilles is entangled and collected by using multiple rotating wheels and cleaning rollers, so as to prevent the flocculent floating dust from floating everywhere;

[0015] The truncated cone-shaped rotating wheel is used to contact the side wall of the Z-shaped grille, and the rotating wheel is made of rubber. Under the elasticity and friction characteristics of the rubber material, the rotating wheel can better contact the Z-shaped grille without causing damage to the Z-shaped grille. When the end of the rotating wheel with a smaller diameter contacts the side wall of the Z-shaped grille and rolls, the Z-shaped grille is subjected to the lateral extrusion force brought by the rolling of the rotating wheel, and is uniformly turned to the side under extrusion, so that all Z-shaped grilles are uniformly turned, thereby achieving the purpose of changing the angle between two adjacent Z-shaped grilles, and synchronously changing the air outlet angle. At the same time, the rotating wheel is used to rotate with the cleaning roller, so that the gap between two adjacent Z-shaped grilles can be continuously and comprehensively cleaned. The flocculent floating dust adhered to the gap is entangled and collected. By removing the flocculent floating dust, the gap between two adjacent Z-shaped grilles for heat dissipation can be prevented from being blocked, and a good ventilation state can be maintained to ensure that the exhaust fan can effectively dissipate heat and avoid damage to the equipment due to overheating. Compared with the prior art, the heat dissipation holes are directly exposed to the use environment and the flocculent floating dust is not processed. With the increase of use time, the flocculent floating dust is likely to block the heat dissipation holes. The flocculent floating dust in the gap between two adjacent Z-shaped grilles is collected by the cleaning roller cycle, which indirectly improves the air circulation efficiency of the Z-shaped grille, thereby improving the heat dissipation effect;

[0016] Finally, the main purpose of the method of removing flocculent floating dust adopted in this scheme is to improve the wind permeability of the Z-shaped grille, thereby improving the heat dissipation effect, and replacing the traditional dust removal device that needs to be driven by electricity. It not only saves energy, but also has a simple equipment structure, low failure rate, and thus higher stability.

[0017] (2) The contact plate contacts the cleaning roller, and the rotating wheel rolls on the surface of the contact plate, so that the flocculent dust entangled on the surface of the cleaning roller can be knocked off when it contacts the contact plate, which can keep the surface of the cleaning roller clean, thereby ensuring that the cleaning roller has a better cleaning effect. The cleaned cleaning roller removes the flocculent dust in the gap between two adjacent Z-shaped grilles, which can improve the ventilation effect of the gap between two adjacent Z-shaped grilles, thereby improving the heat dissipation efficiency. When the rotating wheel rolls on the surface of the contact plate, the contact plate is squeezed by the rotating wheel due to the contact between the rotating wheel and the contact plate. The first support spring is pressed together with the pressure plate, and when the rotating wheel does not contact the contact plate, the contact plate is reset and shaken under the rebound action of the first support spring, so that the flocculent dust falling on the surface of the contact plate is shaken off, and when the flocculent dust falls into the collection box, the collection box can be conveniently withdrawn and the collected flocculent dust can be uniformly collected and processed in a unified manner in conjunction with the plug-in relationship between the collection box and the pressure plate, which helps to keep the inside of the rectangular slot in a clean state at all times, ensures normal heat dissipation of the equipment body, and is beneficial to maintaining the working performance of the equipment body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial cross-sectional side view of the overall structure of the present invention;

[0021] Figure 3 It is a partial structural sectional view of the device body of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the Z-shaped grid of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the auxiliary dust removal mechanism of the present invention from a side view;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the auxiliary dust removal mechanism of the present invention;

[0025] Figure 7 It is a partial three-dimensional structural schematic diagram of the auxiliary dust removal mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating wheel of the present invention;

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the collection box of the present invention.

[0028] In the figure: 1. Equipment body; 2. Rectangular groove; 201. Exhaust fan; 3. Z-shaped grille; 401. First fixed frame; 402. Second fixed frame; 403. Rotating shaft; 404. Connecting belt; 405. First gear; 406. Support cross bar; 407. Rotating wheel; 408. Cleaning roller; 501. Spiral blade; 502. Second gear; 503. Air inlet pipe; 504. Air outlet pipe; 601. Collecting box; 602. Pressing plate; 603. First supporting spring; 604. Contact plate. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figures 1 to 9 As shown, the present invention provides an embodiment: a mini host interface expansion device, comprising a device body 1, a rectangular groove 2 is opened on the outer wall of one side of the device body 1, an exhaust fan 201 is rotatably connected to the inner wall of the rectangular groove 2, a plurality of Z-shaped grilles 3 are evenly rotatably connected to the outer wall of the device body 1 and located at the opening of the rectangular groove 2, the Z-shaped grilles 3 are of overall linkage design, and an auxiliary dust removal mechanism for cleaning dust in the gap between two adjacent Z-shaped grilles 3 is arranged inside the rectangular groove 2;

[0031] The auxiliary dust removal mechanism includes a first fixed frame 401 fixedly connected to the inner wall of the top end of the equipment body 1, and a second fixed frame 402 is also fixedly connected to the inner wall of the bottom end of the equipment body 1. The first fixed frame 401 and the second fixed frame 402 are both located inside the rectangular groove 2. A rotating shaft 403 is rotatably connected inside the first fixed frame 401 and the second fixed frame 402. Two connecting belts 404 are symmetrically connected to the outer walls of the ends of the two rotating shafts 403. The outer walls of the ends of the rotating shafts 403 are fixedly connected to the first gear 405. A supporting cross bar 406 is fixedly connected to the outer walls of the top ends of the two connecting belts 404. A rotating wheel 407 is rotatably connected to the outer wall of the supporting cross bar 406 away from the rotating shaft 403. A cleaning roller 408 is fixedly connected to the outer wall of one side of the rotating wheel 407. The contour shape of the rotating wheel 407 is a truncated cone. The manufacturing material of the rotating wheel 407 is rubber. A plurality of rotating wheels 407 are evenly arranged on the outer wall of the supporting cross bar 406, and the number of rotating wheels 407 and the number of cleaning rollers 408 are the same.

[0032] A spiral blade 501 is rotatably connected to the bottom of the second fixed frame 402 and located on one side of the rotating shaft 403. The spiral blade 501 is fixedly connected to the second gear 502 at one end close to the first gear 405. The first gear 405 is meshed with the second gear 502. An air inlet pipe 503 is fixedly connected to the inner wall of the bottom end of the rectangular groove 2. The opening of the air inlet pipe 503 is located on one side of the exhaust fan 201. An air outlet pipe 504 is fixedly connected to the outer wall of the air inlet pipe 503 close to the spiral blade 501. The air outlet pipe 504 is connected to the inside of the air inlet pipe 503. The opening diameter of the air inlet pipe 503 is larger than the opening diameter of the air outlet pipe 504.

[0033] Specifically, a plurality of rotating wheels 407 and cleaning rollers 408 are arranged on the outer wall of the supporting cross bar 406, and each rotating wheel 407 and cleaning roller 408 is just located in the gap between two adjacent Z-shaped grilles 3, the bottoms of the two adjacent Z-shaped grilles 3 are connected by hinges, and the inside of the hinges of the Z-shaped grilles 3 are sleeved with torsion springs, so that the purpose of uniformly controlling the flipping of the plurality of Z-shaped grilles 3 can be achieved. Since the rotating wheel 407 is in a truncated cone shape, and the overall contour shape has a flat-topped cone at one end and a cylindrical shape at the other end, the truncated cone-shaped rotating wheel 407 is in contact with the side wall of the Z-shaped grille 3, so that the flat-topped cone end of the rotating wheel 407 can be in contact with the side wall of the Z-shaped grille 3, thereby making the rotating wheel 407 self-rotate in the gap between the two adjacent Z-shaped grilles 3 along with the cyclic rotation of the supporting cross bar 406, and at the same time When the Z-shaped grille 3 is subjected to the lateral extrusion force brought by the rolling of the rotating wheel 407, the Z-shaped grille 3 is uniformly flipped to the squeezed side, so that all the Z-shaped grilles 3 are uniformly flipped to one side; and when the rotating wheel 407 does not conflict with the Z-shaped grille 3, the Z-shaped grille 3 is reset under the action of the torsion spring rebound force, thereby achieving the purpose of changing the angle between two adjacent Z-shaped grilles 3 and changing the air outlet angle synchronously. The rotating wheel 407 is used to rotate with the cleaning roller 408, so that the flocculent floating dust in the gap between two adjacent Z-shaped grilles 3 can be continuously collected. By removing the flocculent floating dust, the gap between two adjacent Z-shaped grilles 3 for heat dissipation can be prevented from being blocked, and a good ventilation state can be maintained, ensuring that the exhaust fan 201 can effectively dissipate heat and avoid damage to the equipment due to overheating.

[0034] A collecting box 601 is inserted into the inner wall of the bottom of the rectangular groove 2 and is located directly below the Z-shaped grille 3. A pressure plate 602 is fixedly connected to the inner wall of the bottom end of the collecting box 601. A first supporting spring 603 is fixedly connected to the outer wall of the pressure plate 602. An end of the first supporting spring 603 away from the pressure plate 602 is fixedly connected to a resistance plate 604. The outer contour of the collecting box 601 is L-shaped. Multiple first supporting springs 603 are evenly arranged between the outer wall of the pressure plate 602 and the outer wall of the resistance plate 604. The surface of the resistance plate 604 close to the exhaust fan 201 is concave.

[0035] In combination with the above preferred embodiments, the working principle of the present invention is as follows:

[0036] In the initial state, the exhaust fan 201 is in a stationary state, and the first support spring 603 is in an uncompressed state.

[0037] When working:

[0038] The staff completes the wiring work by correspondingly plugging various cables into the sockets on the surface of the device body 1, and then places the device body 1 on the surface of indoor furniture for use. When the device body 1 generates heat during operation, the exhaust fan 201 is started by the control unit inside the device body 1, so that the exhaust fan 201 rotates at a high speed inside the rectangular groove 2, and uses the flow of wind to take away the heat, thereby achieving the purpose of heat dissipation. By setting a plurality of Z-shaped grilles 3 that can be linked and flipped, the device body 1 maintains the overall design beauty without affecting the heat dissipation, and avoids the damage caused by accidental touching of the exhaust fan 201 by fingers. The angle formed by the gap between the two adjacently arranged Z-shaped grilles 3 can prevent flocculent floating dust from entering the rectangular groove 2. At the same time, under the interference of the rotating wheel 407 and the Z-shaped grille 3, the Z-shaped grille 3 that is flipped in linkage can uniformly achieve the purpose of changing the air outlet angle. At the same time, the Z-shaped grille 3 in the prior art is mostly used in the fields of electronic equipment and mechanical equipment. Those skilled in the art have not combined the Z-shaped grille 3 with the device body 1 and made corresponding improvements in heat dissipation. When the exhaust fan 201 rotates to generate air volume, the wind can not only be discharged through the gap of the Z-shaped grille 3, but also enter the interior of the air inlet pipe 503. Since the opening diameter of the air inlet pipe 503 is larger than the outlet diameter of the air outlet pipe 504, when the airflow flows from the air inlet pipe 503 with a large aperture into the interior of the air outlet pipe 504 with a small aperture, its flow rate will also become faster, and then as the exhaust fan 201 continues to rotate, it can make The airflow is continuously blown out through the opening of the air outlet 504, and the high-speed airflow makes the spiral blade 501 rotate with the second gear 502. Under the meshing action of the first gear 405 and the second gear 502, the rotating shaft 403 fixedly connected to the first gear 405 rotates synchronously, and under the transmission action of the connecting belt 404, the connecting belt 404 can rotate synchronously with the supporting cross bar 406. By arranging multiple rotating wheels 407 and cleaning rollers 408 on the outer wall of the supporting cross bar 406, and each rotating wheel 407 and cleaning roller 408 is just located in the gap between two adjacent Z-shaped grilles 3, the bottoms of the two adjacent Z-shaped grilles 3 are connected by hinges, and the hinges of the Z-shaped grilles 3 are sleeved with torsion springs, so that unified control of multiple The purpose of flipping the Z-shaped grilles 3 is that the rotating wheel 407 is in a truncated cone shape, and one end of the overall contour is in a flat-topped cone shape and the other end is in a cylindrical shape. The truncated cone-shaped rotating wheel 407 is used to contact the side wall of the Z-shaped grille 3, so that the flat-topped cone-shaped end of the rotating wheel 407 can contact the side wall of the Z-shaped grille 3, and then the rotating wheel 407 rotates in the gap between two adjacent Z-shaped grilles 3 along with the cyclic rotation of the supporting cross bar 406. At the same time, the Z-shaped grilles 3 are subjected to the lateral extrusion force brought by the rolling of the rotating wheel 407, so that the Z-shaped grilles 3 are uniformly flipped to the squeezed side, so that all the Z-shaped grilles 3 are uniformly flipped to one side, and when the rotating wheel 407 does not contact the Z-shaped grilles 3, the Z-shaped grilles 3 are reset under the action of the rebound force of the torsion spring.Thus, the purpose of changing the angle between two adjacent Z-shaped grilles 3 is achieved, and the air outlet angle is changed synchronously. The rotating wheel 407 drives the cleaning roller 408 to rotate, so that the flocculent floating dust in the gap between two adjacent Z-shaped grilles 3 can be continuously entangled and collected. By removing the flocculent floating dust, the gap between two adjacent Z-shaped grilles 3 for heat dissipation can be prevented from being blocked, and a good ventilation state can be maintained, ensuring that the exhaust fan 201 can effectively dissipate heat and avoid damage to the equipment due to overheating;

[0039] In addition, when the rotating wheel 407 and the cleaning roller 408 move to the inside of the collecting box 601 as the supporting cross bar 406 rotates, they contact the cleaning roller 408 through the contact plate 604, and the rotating wheel 407 rolls on the surface of the contact plate 604, so that the flocculent floating dust entangled on the surface of the cleaning roller 408 can be knocked off when it contacts the contact plate 604, which can keep the surface of the cleaning roller 408 clean, thereby ensuring that the cleaning roller 408 has a better cleaning effect. When the rotating wheel 407 rolls on the surface of the contact plate 604, due to the contact between the rotating wheel 407 and the contact plate 604, The contact plate 604 will be squeezed by the rotating wheel 407, and then cooperate with the pressure plate 602 to squeeze the first support spring 603, so that when the rotating wheel 407 does not contact the contact plate 604, the first support spring 603 rebounds and causes the contact plate 604 to reset and shake, thereby shaking off the flocculent dust that falls on the surface of the contact plate 604, and when the flocculent dust falls into the collection box 601, the collection box 601 can be easily pulled out and the collected flocculent dust can be collected and processed uniformly in cooperation with the plug-in relationship between the collection box 601 and the pressure plate 602.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] 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. A mini host interface expansion device, comprising a device body (1), wherein a rectangular groove (2) is provided on an outer wall of one side of the device body (1), and an exhaust fan (201) is rotatably connected to the inner wall of the rectangular groove (2), characterized in that: The outer wall of the device body (1) is evenly connected to a plurality of Z-shaped grilles (3) at the opening of the rectangular groove (2); the Z-shaped grilles (3) are of an integral linkage design; an auxiliary dust removal mechanism for cleaning dust in the gap between two adjacent Z-shaped grilles (3) is provided inside the rectangular groove (2).

2. The mini host interface expansion device according to claim 1, characterized in that: The auxiliary dust removal mechanism comprises a first fixed frame (401) fixedly connected to the inner wall of the top end of the equipment body (1); the inner wall of the bottom end of the equipment body (1) is also fixedly connected to a second fixed frame (402); the first fixed frame (401) and the second fixed frame (402) are both located inside the rectangular groove (2); a rotating shaft (403) is rotatably connected to the inside of the first fixed frame (401) and the second fixed frame (402); two connecting belts (404) are symmetrically connected to the outer walls of the ends of the two rotating shafts (403); a first gear (405) is fixedly connected to the outer walls of the ends of the rotating shafts (403); a supporting cross bar (406) is fixedly connected to the outer walls of the top ends of the two connecting belts (404); the outer wall of the supporting cross bar (406) away from the rotating shaft (403) is rotatably connected to a rotating wheel (407); and the outer wall of one side of the rotating wheel (407) is fixedly connected to a cleaning roller (408).

3. The mini host interface expansion device according to claim 2, characterized in that: The rotating wheel (407) has a truncated cone shape and is made of rubber. A plurality of rotating wheels (407) are evenly arranged on the outer wall of the supporting crossbar (406), and the number of the rotating wheels (407) and the number of the cleaning rollers (408) are the same.

4. The mini host interface expansion device according to claim 2, characterized in that: A spiral blade (501) is rotatably connected to the bottom of the second fixing frame (402) and located on one side of the rotating shaft (403); one end of the spiral blade (501) close to the first gear (405) is fixedly connected to the second gear (502); the first gear (405) is meshed with the second gear (502).

5. The mini host interface expansion device according to claim 4, characterized in that: An air inlet pipe (503) is fixedly connected to the inner wall at the bottom end of the rectangular groove (2); the opening of the air inlet pipe (503) is located on one side of the exhaust fan (201); an air outlet pipe (504) is fixedly connected to the outer wall of the air inlet pipe (503) on the side close to the spiral blade (501); the air outlet pipe (504) is connected to the inside of the air inlet pipe (503); and the opening diameter of the air inlet pipe (503) is larger than the opening diameter of the air outlet pipe (504).

6. The mini host interface expansion device according to claim 1, characterized in that: A collection box (601) is inserted into the inner wall of the bottom of the rectangular groove (2) and is located directly below the Z-shaped grid (3); a pressure plate (602) is fixedly connected to the inner wall of the bottom end of the collection box (601); a first support spring (603) is fixedly connected to the outer wall of the pressure plate (602); and a resistance plate (604) is fixedly connected to one end of the first support spring (603) away from the pressure plate (602).

7. The mini host interface expansion device according to claim 6, characterized in that: The outer contour of the collection box (601) is L-shaped, and a plurality of first support springs (603) are evenly arranged between the outer wall of the pressure plate (602) and the outer wall of the resistance plate (604), and the surface of the resistance plate (604) close to the exhaust fan (201) is concave.

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