Sealed anti-interference electronic communication cabinet
The wind-driven cooling system and adjustable cable harness mechanism solve the problems of poor heat dissipation and inflexible cable harnesses in electronic communication cabinets, achieving energy conservation, environmental protection and efficient heat dissipation, and improving the safety and adaptability of the equipment.
Patent Information
- Application Number
- CN202511070236.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-10-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing electronic communication cabinets have poor heat dissipation effects and their wiring structures are difficult to adjust, resulting in energy waste and low flexibility.
The wind-driven cooling system is combined with an adjustable cable bundle mechanism. The air blowing mechanism is driven by the wind wheel, bevel gear and connecting shaft to achieve dust cleaning and heat dissipation of the equipment. The position of the cable bundle plate is adjusted by magnets and guide grooves to improve the cleanliness and flexibility of the equipment.
It achieves energy-saving and environmentally friendly heat dissipation effects, enhances the safety and flexibility of equipment, and improves the neatness and adaptability of lines.
Smart Images

Figure CN120751640A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electronic communication cabinets, and in particular to a sealed and interference-proof electronic communication cabinet. Background Art
[0002] Electronic communication cabinets are made of metal or non-metal materials, do not allow unauthorized operators to enter and operate the cabinet, and provide outdoor physical working environment and safety system equipment for wireless communication sites or wired network site workstations;
[0003] A network communication cabinet disclosed in publication number CN110769328A includes a cabinet body, an inner top wall of the cabinet body is fixedly connected to an air intake pipe with one end passing through and extending to the outside of the cabinet body, an inner wall of the air intake pipe is fixedly connected to a dustproof net, two motors are fixedly installed on the inner top wall of the cabinet body, the output shafts of the two motors are fixedly connected to a rotating shaft, and fan blades are fixedly connected to the left and right sides of the two rotating shafts, and two limit rods are fixedly connected between the inner top wall and the inner bottom wall of the cabinet body. The invention is used for a network communication cabinet. By setting a limit rod and moving a movable block, the partition can be moved. By setting a slider and a slide rail, when it is adjusted to a suitable position, the handle is turned to rotate the threaded rod. By setting a connecting block, the forward and backward movement of the threaded rod is more stable. The threaded rod can fix the fixed block on the limit rod, thereby realizing the adjustment of the space size. When the above-mentioned prior art is used, the technical solution adopts a method of using a motor to drive the fan blades to rotate to achieve heat dissipation. However, since the electric drive structure generates heat during operation and is easily attracted to dust due to discharge, it causes conflict and wastes energy. There is a certain room for optimization. Therefore, corresponding improvements can be made.
[0004] The electronic communication cabinet line collection device disclosed in publication number CN113422334A includes an electronic communication cabinet body, wherein the inner bottom of the electronic communication cabinet body is fixedly connected to a fixed main frame by bolts, and a collection box is fixedly connected to one side of the fixed main frame. The collection box includes a box base fixedly mounted on the fixed main frame, a partition plate fixedly mounted on the upper surface of the box base, and a box cover rotatably mounted on the partition plate. One side of the box cover is fixedly connected to the partition plate by a buckle. Shielding plates are provided between the partition plates and inside the box base and the box cover. Ventilation holes are opened on the surface of the partition plate. The present invention uses a fixed main frame and a collection box to centrally arrange communication lines and the like in the electronic communication cabinet, thereby avoiding the communication lines being scattered in the electronic communication cabinet and difficult to repair. The shielding plates and the partition plates are used to separate the communication lines to avoid mutual interference between the communication lines. The ventilation and heat dissipation are facilitated by the ventilation holes on the partition plates. When the above-mentioned prior art is used, its adjustment for the bundle can achieve the corresponding use purpose, but its bundle structure position is relatively fixed, which is not convenient for adjustment and has low flexibility. Therefore, corresponding improvements can be made. Summary of the Invention
[0005] The object of the present invention is to provide a sealed and anti-interference electronic communication cabinet to solve the problems of poor heat dissipation and inconvenience in adjusting the wiring harness proposed in the above background art.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealed and interference-proof electronic communication cabinet, comprising an electronic communication cabinet body, a rotating shaft is installed on the top of the electronic communication cabinet body, and a wind wheel is installed on the top of the rotating shaft, a wind collecting cover is installed on the top of the electronic communication cabinet body outside the wind wheel, the bottom end of the rotating shaft vertically passes through the interior of the electronic communication cabinet body, a first bevel gear is installed on the outside of the rotating shaft, and a second bevel gear is meshed on both sides of the first bevel gear, a second connecting shaft and a blowing mechanism are respectively provided on the outside of the second bevel gear, the blowing mechanism comprises a first connecting shaft, and the first connecting shaft is installed on the outside of the second bevel gear, a rotating disk is installed on the outside of the first connecting shaft, and a rotating block is installed on the outside of the rotating disk, and a rotating block is installed on the outside of the rotating block. A lifting frame is provided, and a connecting frame is installed on the outside of the lifting frame, an air cylinder is installed on the outside of the connecting frame, an eccentric wheel is installed on one side of the second connecting shaft, an opening and closing mechanism is provided on the side of the electronic communication cabinet body close to the eccentric wheel, the interior of the electronic communication cabinet body is evenly provided with mounting plates, the bottom end of the mounting plate and the top end of the interior of the electronic communication cabinet body are both provided with air blowing pipes, and one side of the air blowing pipe is connected through a connecting pipe, the air cylinder is connected to the air blowing pipe, the bottom end of the air blowing pipe is evenly provided with air blowing heads, and the bottom end of the air blowing heads is provided with a removable sealing head, the interior of the electronic communication cabinet body is provided with a cabinet body, and the outside of the cabinet body is provided with an electromagnetic isolation layer, the outside of the electromagnetic isolation layer is provided with a copper foil anti-interference layer, and the outside of the copper foil anti-interference layer is provided with an insulating layer.
[0007] Preferably, the opening and closing mechanism includes a limiting rod, and a spring is installed on the outside of the limiting rod, a movable frame is installed on the outside of the electronic communication cabinet body at the top of the spring, a cover is evenly installed inside the movable frame, and a heat dissipation groove is evenly provided on one side of the inside of the electronic communication cabinet body.
[0008] Preferably, the width of the cover plate is greater than the width of the heat dissipation slot, and two groups of the cover plate and the heat dissipation slot are provided.
[0009] Preferably, sliding rods are evenly installed on both sides of the interior of the electronic communication cabinet body, and sliding sleeves are installed on the outer sides of the sliding rods, connecting blocks are installed on the inner sides of the sliding sleeves, and wire harness plates are installed between the connecting blocks, and a wire harness mechanism is provided on the inner side of the wire harness plates.
[0010] Preferably, the wiring mechanism includes a wiring trough, and the wiring troughs are all arranged inside the wiring board, baffles are evenly installed on the wiring board outside the wiring trough, and first magnets are evenly installed inside the baffles, and second magnets are evenly installed inside the wiring board.
[0011] Preferably, guide blocks are installed on both sides of the cable tie plate, guide grooves are evenly arranged inside the sliding sleeve, and the guide grooves are connected to the guide blocks.
[0012] Preferably, anti-slip protrusions are evenly installed on the inner side of the sliding sleeve, and the cross-section of the anti-slip protrusions is semicircular.
[0013] Preferably, the width of the guide groove matches the width of the guide block, and the guide groove and the guide block are symmetrically arranged with respect to the central axis of the wire harness plate.
[0014] Preferably, both ends of the lifting frame are installed with limit blocks, and both ends of the interior of the electronic communication cabinet body are provided with limit grooves matching the limit blocks.
[0015] Compared with the existing technology, the beneficial effects of the present invention are as follows: the sealed and anti-interference electronic communication cabinet fully utilizes wind energy, avoids the dust absorption and self-heating of the electric drive structure during operation, effectively enhances energy utilization, achieves energy saving and environmental protection effects, and can simultaneously achieve the dust cleaning and heat dissipation functions of the equipment. By setting a wire harness mechanism, it can be adjusted in many aspects to meet different usage requirements;
[0016] 1. A wind collecting cover is set on the top of the main body of the electronic communication cabinet to improve the wind gathering effect, so that the wind wheel receives wind energy and rotates. The rotating shaft drives the first connecting shaft and the second connecting shaft to rotate through the meshing action of the first bevel gear and the second bevel gear. The first connecting shaft drives the rotating disk and the rotating block to rotate, so as to synchronously drive the lifting frame to move in the vertical direction. The air cylinder is further driven to expand and contract through the connecting frame to blow air into the air blowing pipe. The air blowing head sprays the gas to the surface of the equipment, which can simultaneously clean the dust on the surface while dissipating heat and cooling. The second connecting shaft drives the eccentric wheel to rotate. The eccentric wheel continuously presses the movable frame during rotation so that the cover plate and the scattering frame are in contact with each other. The heat slot forms an open and closed state to remove the heat generated by the equipment, thereby improving the heat dissipation efficiency of the electronic communication cabinet body, and making full use of the wind energy as a whole, avoiding the dust absorption and self-heating phenomenon of the electric drive structure during operation, effectively enhancing the utilization of energy, achieving energy saving and environmental protection effects, and at the same time being able to achieve the dust cleaning and heat dissipation functions of the equipment, improving the safety and flexibility of the electronic communication cabinet body during use, and further, a detachable sealing head is provided on the outside of the air blowing head, which can adjust the opening number of the air blowing head according to the number of installed equipment, so that the blowing can be more concentrated when there are fewer equipment, further improving the effective utilization of energy;
[0017] 2. Multiple groups of wire harnesses are evenly arranged inside the main body of the electronic communication cabinet. During use, the multiple groups of wire harness troughs inside can classify and sort the lines to improve the neatness of the lines. Further, by setting a cover plate, the first magnet and the second magnet can be used to facilitate the sealing of the wire harness trough. Further, by setting a sliding rod and a sliding sleeve, and cooperating with the anti-slip protrusion, the wire harness plate can be adjusted to move up and down in the vertical direction, and the anti-slip protrusion can increase the lifting friction, so that it is not easy to loosen and fall after moving to a certain position. Further, by setting a guide block and a guide groove, the wire harness plate can be easily moved forward and backward, so as to facilitate the wire harnessing operation of the lines inside the wire harness plate after sliding outward. Therefore, through various adjustments, its practicality and flexibility can be effectively improved to meet different usage needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the internal structure of the electronic communication cabinet body of the present invention;
[0021] Figure 3 Schematic diagram of the three-dimensional structure of the wire harness mechanism of the present invention;
[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the connecting block of the present invention;
[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating disk of the present invention;
[0024] Figure 6 Schematic diagram of the three-dimensional structure of the sliding sleeve of the present invention;
[0025] Figure 7 It is a schematic diagram of the front cross-sectional structure of the present invention.
[0026] Explanation of the reference numerals in the figure: 1. wind collecting cover; 2. wind wheel; 3. rotating shaft; 4. first bevel gear; 5. electronic communication cabinet body; 6. eccentric wheel; 7. opening and closing mechanism; 701. movable frame; 702. cover plate; 703. heat dissipation slot; 704. spring; 705. limit rod; 8. slide rod; 9. sliding sleeve; 10. anti-slip protrusion; 11. connecting block; 12. cable tie plate; 13. mounting plate; 14. guide groove; 15. guide block; 16. air blowing pipe; 17. air blowing head; 18. connecting pipe ; 19. Blowing mechanism; 1901. Connecting frame; 1902. Rotating block; 1903. Lifting frame; 1904. Rotating disk; 1905. First connecting shaft; 1906. Air cylinder; 20. Second bevel gear; 21. Second connecting shaft; 22. Wire harnessing mechanism; 2201. Wire harnessing trough; 2202. Baffle; 2203. First magnet; 2204. Second magnet; 23. Cabinet; 24. Electromagnetic isolation layer; 25. Copper foil anti-interference layer; 26. Insulation layer; 27. Removable sealing head. DETAILED DESCRIPTION
[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.
[0028] Example 1
[0029] See also Figure 1-7The present invention provides a wear resistance tester for plastic particles, comprising an electronic communication cabinet body 5, wherein slide bars 8 are evenly installed on both sides of the interior of the electronic communication cabinet body 5, and sleeves 9 are installed on the outside of the slide bars 8, and connecting blocks 11 are installed on the inside of the sleeves 9, and wire harness plates 12 are installed between the connecting blocks 11, and a wire harness mechanism 22 is provided on the inside of the wire harness plate 12, and the wire harness mechanism 22 includes a wire harness groove 2201, and the wire harness groove 2201 is evenly installed on the wire harness plate 12 outside the wire harness groove 2201. There is a baffle 2202, and the inside of the baffle 2202 is equipped with a first magnet 2203, the inside of the wire harness plate 12 is evenly equipped with a second magnet 2204, and both sides of the wire harness plate 12 are equipped with guide blocks 15, the inside of the sliding sleeve 9 is evenly provided with guide grooves 14, and the guide grooves 14 are connected to the guide blocks 15, and the inside of the sliding sleeve 9 is evenly equipped with anti-slip protrusions 10, and the cross-section of the anti-slip protrusions 10 is set to be semicircular, the width of the guide grooves 14 matches the width of the guide blocks 15, and the guide grooves 14 and the guide blocks 15 are about The central axis of the wiring harness plate 12 is symmetrically arranged. A rotating shaft 3 is installed at the top of the electronic communication cabinet body 5, and a wind wheel 2 is installed at the top of the rotating shaft 3. A wind collecting cover 1 is installed at the top of the electronic communication cabinet body 5 outside the wind wheel 2. The bottom end of the rotating shaft 3 vertically penetrates the interior of the electronic communication cabinet body 5. A first bevel gear 4 is installed on the outside of the rotating shaft 3, and a second bevel gear 20 is engaged on both sides of the first bevel gear 4. A second connecting shaft 21 and a blowing mechanism 19 are respectively provided on the outside of the second bevel gear 20. The blowing mechanism 19 includes a first connecting shaft 1905 , and the first connecting shaft 1905 is installed on the outside of the second bevel gear 20, a rotating disk 1904 is installed on the outside of the first connecting shaft 1905, and a rotating block 1902 is installed on the outside of the rotating disk 1904, a lifting frame 1903 is installed on the outside of the rotating block 1902, and limit blocks are installed at both ends of the lifting frame 1903. Limit grooves matching the limit blocks are provided at both ends of the inside of the electronic communication cabinet main body 5, and a connecting frame 1901 is installed on the outside of the lifting frame 1903, and an air cylinder 1906 is installed on the outside of the connecting frame 1901.
[0030] In this embodiment, when in use, a wind collecting cover 1 is provided on the top of the electronic communication cabinet body 5 to improve the wind gathering effect, so that the wind wheel 2 receives wind energy and rotates, and the rotating shaft 3 drives the first connecting shaft 1905 and the second connecting shaft 21 to rotate through the meshing action of the first bevel gear 4 and the second bevel gear 20, and the first connecting shaft 1905 drives the rotating disk 1904 and the rotating block 1902 to rotate, so as to synchronously drive the lifting frame 1903 to move in the vertical direction, and further drives the air cylinder 1906 to extend and retract through the connecting frame 1901 to blow air into the blowing pipe 16, and the blowing head 17 sprays the gas to the surface of the equipment, which can simultaneously clean the dust on its surface while dissipating heat and cooling it.
[0031] Example 2
[0032] This embodiment also includes: an eccentric wheel 6 is installed on one side of the second connecting shaft 21, and an opening and closing mechanism 7 is provided on the side of the electronic communication cabinet body 5 close to the eccentric wheel 6. The opening and closing mechanism 7 includes a limit rod 705, and a spring 704 is installed on the outside of the limit rod 705. A movable frame 701 is installed on the outside of the electronic communication cabinet body 5 at the top of the spring 704, and a cover plate 702 is evenly installed inside the movable frame 701. Heat dissipation grooves 703 are evenly provided on one side of the interior of the electronic communication cabinet body 5. The width of the cover plate 702 is greater than the width of the heat dissipation groove 703. Two groups of cover plates 702 and heat dissipation grooves 703 are provided.
[0033] In this embodiment, when in use, when the second connecting shaft 21 drives the eccentric wheel 6 to rotate, the eccentric wheel 6 continuously presses the movable frame 701 during rotation, so that the cover plate 702 and the heat dissipation groove 703 form an open and closed state, so as to remove the heat generated by the equipment, thereby improving the efficiency of the electronic communication cabinet body 5, and making full use of the wind energy as a whole, avoiding the dust absorption and self-heating of the electric drive structure during operation, and effectively enhancing the utilization of energy.
[0034] Example 3
[0035] This embodiment also includes: the interior of the electronic communication cabinet main body 5 is evenly installed with a mounting plate 13, the bottom end of the mounting plate 13 and the top of the interior of the electronic communication cabinet main body 5 are both installed with an air blowing pipe 16, and one side of the air blowing pipe 16 is connected through a connecting pipe 18, the air cylinder 1906 is connected to the air blowing pipe 16, the bottom end of the air blowing pipe 16 is evenly installed with an air blowing head 17, and the bottom end of the air blowing head 17 is installed with a removable sealing head 27, the interior of the electronic communication cabinet main body 5 is provided with a cabinet body 23, and the outside of the cabinet body 23 is provided with an electromagnetic isolation layer 24, the outside of the electromagnetic isolation layer 24 is provided with a copper foil anti-interference layer 25, and the outside of the copper foil anti-interference layer 25 is provided with an insulating layer 26.
[0036] In this embodiment, by providing a removable sealing head 27 during use, the open number of the blowing head 17 can be adjusted according to the number of installed devices. When there are few devices, the blowing can be more concentrated, further improving the effective use of energy. Furthermore, the anti-interference effect of the electronic communication cabinet main body 5 can be achieved through the cooperation of the electromagnetic isolation layer 24, the copper foil anti-interference layer 25 and the insulating layer 26.
[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.
[0038] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A sealed and anti-interference electronic communication cabinet, comprising an electronic communication cabinet body (5), characterized in that: The top of the electronic communication cabinet body (5) is provided with a rotating shaft (3), and the top of the rotating shaft (3) is provided with a wind wheel (2), and the top of the electronic communication cabinet body (5) outside the wind wheel (2) is provided with a wind collecting cover (1), the bottom end of the rotating shaft (3) vertically penetrates the interior of the electronic communication cabinet body (5), the outside of the rotating shaft (3) is provided with a first bevel gear (4), and both sides of the first bevel gear (4) are meshed with a second bevel gear (20), and the outside of the second bevel gear (20) is provided with a second connecting member. The invention relates to a device for producing a plurality of rotary actuators, wherein the plurality of rotary actuators are provided with ... An air cylinder (1906) is installed on the outside of the connecting frame (1901), an eccentric wheel (6) is installed on one side of the second connecting shaft (21), an opening and closing mechanism (7) is provided on the side of the electronic communication cabinet body (5) close to the eccentric wheel (6), a mounting plate (13) is evenly installed inside the electronic communication cabinet body (5), a blowing pipe (16) is installed at the bottom end of the mounting plate (13) and the top end of the inside of the electronic communication cabinet body (5), and one side of the blowing pipe (16) is connected to the connecting pipe (18). The air cylinder (1906) is connected to the air blowing pipe (16), the bottom end of the air blowing pipe (16) is evenly installed with an air blowing head (17), and the bottom end of the air blowing head (17) is evenly installed with a detachable plugging head (27), the interior of the electronic communication cabinet body (5) is provided with a cabinet body (23), and the outer side of the cabinet body (23) is provided with an electromagnetic insulation layer (24), the outer side of the electromagnetic insulation layer (24) is provided with a copper foil anti-interference layer (25), and the outer side of the copper foil anti-interference layer (25) is provided with an insulating layer (26).
2. The sealed and anti-interference electronic communication cabinet according to claim 1, characterized in that: The opening and closing mechanism (7) includes a limiting rod (705), and a spring (704) is installed on the outside of the limiting rod (705). A movable frame (701) is installed on the outside of the electronic communication cabinet body (5) at the top of the spring (704). A cover plate (702) is evenly installed inside the movable frame (701). A heat dissipation groove (703) is evenly provided on one side of the inside of the electronic communication cabinet body (5).
3. The sealed and anti-interference electronic communication cabinet according to claim 2, characterized in that: The width of the cover plate (702) is greater than the width of the heat dissipation slot (703), and two groups of the cover plate (702) and the heat dissipation slot (703) are provided.
4. The sealed and anti-interference electronic communication cabinet according to claim 1, characterized in that: Slide rods (8) are evenly installed on both sides of the interior of the electronic communication cabinet body (5), and slide sleeves (9) are installed on the outer sides of the slide rods (8), and connecting blocks (11) are installed on the inner sides of the slide sleeves (9), and wire bundle plates (12) are installed between the connecting blocks (11), and a wire bundle mechanism (22) is provided on the inner side of the wire bundle plates (12).
5. The sealed and anti-interference electronic communication cabinet according to claim 4, characterized in that: The wire harness mechanism (22) includes a wire harness trough (2201), and the wire harness trough (2201) is arranged inside the wire harness plate (12), baffles (2202) are evenly installed on the wire harness plate (12) outside the wire harness trough (2201), and first magnets (2203) are evenly installed inside the baffles (2202), and second magnets (2204) are evenly installed inside the wire harness plate (12).
6. The sealed and anti-interference electronic communication cabinet according to claim 4, characterized in that: Guide blocks (15) are installed on both sides of the wire harness plate (12), and guide grooves (14) are evenly arranged inside the sliding sleeve (9), and the guide grooves (14) are connected to the guide blocks (15).
7. The sealed and anti-interference electronic communication cabinet according to claim 4, characterized in that: Anti-slip protrusions (10) are evenly installed on the inner side of the sliding sleeve (9), and the cross-section of the anti-slip protrusions (10) is set to be semicircular.
8. The sealed and anti-interference electronic communication cabinet according to claim 6, characterized in that: The width of the guide groove (14) matches the width of the guide block (15), and the guide groove (14) and the guide block (15) are symmetrically arranged about the central axis of the wire harness plate (12).
9. The sealed and anti-interference electronic communication cabinet according to claim 1, characterized in that: Limit blocks are installed at both ends of the lifting frame (1903), and limit grooves matching the limit blocks are provided at both ends inside the electronic communication cabinet body (5).
Citation Information
Patent Citations
Network communication cabinet
CN110769328A
Electronic communication cabinet line concentration device
CN113422334A