POE power supply module integrated with filtering module

Abstract

The utility model relates to the technical field of Ethernet power supply, and discloses a POE (Power Over Ethernet) power supply module integrated with a filtering module, which comprises a metal shell and a circuit board arranged in the metal shell, and an input interface, the filtering module, the POE module and an output interface which are sequentially coupled are integrated on the circuit board. The integration of the filtering module significantly reduces the interference in a power supply signal, and also can greatly reduce the radiation interference brought out by a rear-end product through a power line, thereby improving the stability and reliability of equipment. The design of the integrated filtering module can reduce the requirement of an external filter, enables the circuit structure to be more compact, and reduces the maintenance difficulty. Meanwhile, the metal shell not only can prevent electronic components on the circuit board from generating relatively high radiation and influencing a rear-end circuit, but also can be connected with the shell through the GND end of the POE module, so that the filtering effect is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power over Ethernet, especially to a POE power module integrated with a filter module. BACKGROUND

[0002] POE (Power Over Ethernet) refers to a technology that can provide DC power supply for some IP-based terminals (such as IP telephone, wireless LAN access point AP, network camera, etc.) while transmitting data signals, without any modification of the existing Ethernet Cat.5 wiring infrastructure. POE technology can ensure the safety of the existing structured wiring and the normal operation of the existing network, and minimize the cost, and is widely used in network cameras, wireless access points and other devices. For example, the invention patent with the announcement number CN109921914A discloses a similar POE device.

[0003] The above-mentioned POE device is susceptible to external electromagnetic interference in actual application because the power line and the data line share a pair of twisted pair, which leads to a decline in signal quality and affects the normal operation of the device, and therefore needs to be improved. UTILITY MODEL CONTENT

[0004] The utility model provides a POE power module integrated with a filter module, which can effectively reduce external electromagnetic interference and improve the stability and reliability of the device.

[0005] To solve the above technical problems, the utility model solves them through the following technical solutions:

[0006] A POE power module integrated with a filter module includes a metal shell and a circuit board installed in the metal shell, and the circuit board is integrated with an input interface, a filter module, a POE module and an output interface in sequence.

[0007] The integration of the filter module significantly reduces the interference in the power signal and can also greatly reduce the radiation interference caused by the power line of the backend product itself, thereby improving the stability and reliability of the device. The design of the integrated filter module can reduce the need for external filters, making the circuit structure more compact and reducing maintenance difficulty. At the same time, the metal shell can not only prevent the electronic components on the circuit board from emitting high radiation and affecting the backend circuit, but also can be connected to the shell through the GND end of the POE module to enhance the filtering effect.

[0008] As a preferred embodiment, the filter module includes a differential mode filter circuit and a common mode filter circuit coupled in sequence, the input end of the differential mode filter circuit is coupled to the output end of the input interface, and the output end of the common mode filter circuit is coupled to the input end of the POE module.

[0009] Using the above scheme, the differential mode filter circuit is used to filter out differential mode interference in the power supply signal, and the common mode filter circuit is used to filter out common mode interference. The combination of the two can effectively improve the filtering effect of the filter module and further improve the stability and reliability of the POE power module.

[0010] Preferably, the circuit board is mounted on a support plate, and the inner cavity of the metal shell is arranged to run through the front and back. The two opposite side walls of the inner cavity are provided with slots along the opening direction of the inner cavity for the two sides of the support plate to slide and engage. The front and rear ports of the inner cavity are provided with caps.

[0011] Using the above solution, the support plate can stably support the circuit board. Simultaneously, the sliding engagement between the support plate and the two slots enables quick assembly and disassembly of the circuit board, thereby improving maintenance efficiency and convenience. By sealing the front and rear ports of the metal housing's inner cavity with caps, the support plate can be prevented from detaching from the inner cavity, thus enhancing the stability of the circuit board within the metal housing.

[0012] Preferably, the support plate has several support columns on its surface for supporting the circuit board, and the circuit board is fixed to the end of the support column by a first screw.

[0013] The above solution allows the circuit board to be suspended above the support plate, thus leaving a gap for heat dissipation while ensuring the stability of the connection between the circuit board and the support plate.

[0014] Preferably, the inner cavity has several connecting posts on its sidewall near the port, and the cover is fixed to the end of the connecting posts by a second screw.

[0015] The above solution allows the cap to be stably installed at the port of the inner cavity, while also facilitating disassembly and assembly.

[0016] Preferably, one of the capping surfaces is fixed to the side of the support plate.

[0017] Using the above solution, when the cover is disassembled, the support plate carrying the circuit board can be simultaneously pulled out from between the two slots inside the metal housing. When the cover is installed, it can be pre-positioned by the guiding action between the support plate and the slots, thereby achieving automatic hole alignment and further improving operational efficiency and convenience.

[0018] Preferably, the cover fixed to the support plate is defined as a movable cover, which is fixed to the side of the support plate by a third screw.

[0019] Using the above solution, the third screw enables a detachable connection between the movable cover and the support plate, while ensuring the stability of the connection.

[0020] Preferably, the cover surface of the movable cover is provided with at least one positioning column, and the side edge of the support plate is provided with a positioning hole for inserting the positioning column.

[0021] With the above scheme, when the cover and the support plate are docked, the insertion fit between the positioning column and the positioning hole can realize the pre-positioning of the two, thereby facilitating the installation of the third screw. When the cover and the support plate are connected, the fit between the positioning column and the positioning hole can play a circumferential limiting role, further improving the stability after the two are connected.

[0022] Preferably, the end of the positioning column is provided with a hemispherical head.

[0023] With the above scheme, the hemispherical head can play a guiding role, thereby improving the efficiency and convenience of the positioning column entering the positioning hole.

[0024] Preferably, the input interface and the output interface are respectively arranged at the front and rear ends of the circuit board, and the two covers are respectively provided with a first avoiding hole and a second avoiding hole for respectively exposing the input interface and the output interface.

[0025] With the above scheme, the arrangement of the first avoiding hole and the second avoiding hole can facilitate the user to connect the front and rear end devices through the input interface and the output interface, thereby further improving the operation efficiency and convenience.

[0026] The utility model discloses a filter module integrated into the power supply circuit, which can effectively filter the interference in the power supply signal, thereby improving the stability and reliability of the device. The design of the integrated filter module can reduce the demand for external filters, make the circuit structure more compact, and reduce the maintenance difficulty. At the same time, the metal shell can not only prevent the electronic components on the circuit board from generating high radiation and affecting the rear-end circuit, but also can be connected with the shell through the GND end of the POE module, thereby enhancing the filtering effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural diagram of the embodiment Figure 1 ;

[0028] Figure 2 is an explosion of the embodiment Figure 1 ;

[0029] Figure 3 is a circuit diagram of the embodiment

[0030] Figure 4 is an enlarged schematic view of part A shown in Figure 2 ;

[0031] Figure 5 is an explosion of the embodimentFigure 2 ;

[0032] Figure 6 For Figure 5 the enlarged schematic view of B part shown in the figure;

[0033] Figure 7 For the structural schematic of this embodiment Figure 2 .

[0034] The part names referred to by the respective number designations in the above figures are as follows: 1, metal shell; 2, circuit board; 3, input interface; 4, filter module; 5, POE module; 6, output interface; 7, differential mode filter circuit; 8, common mode filter circuit; 9, support plate; 10, inner cavity; 11, clamping groove; 12, cover; 13, support column; 14, first screw; 15, connecting column; 16, second screw; 17, movable cover; 18, third screw; 19, positioning column; 20, positioning hole; 21, half ball head; 22, first avoiding hole; 23, second avoiding hole. DETAILED DESCRIPTION

[0035] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0036] As Figures 1 to 7 shown, the POE power module integrated with a filter module disclosed by the embodiment comprises an aluminum metal shell 1 and a circuit board 2 installed in the metal shell 1, and the circuit board 2 is integrated with an input interface 3, a filter module 4, a POE module 5, and an output interface 6 coupled in sequence. Among them, the input interface 3 and the output interface 6 are Ethernet input and output interfaces 6, which are respectively used for external front-end and rear-end devices. The filter module 4 comprises a differential mode filter circuit 7 and a common mode filter circuit 8 coupled in sequence, the input end of the differential mode filter circuit 7 is coupled to the output end of the input interface 3, and the output end of the common mode filter circuit 8 is coupled to the input end of the POE module 5.

[0037] In order to improve the disassembly efficiency and convenience of the circuit board 2, the circuit board 2 is arranged on a support plate 9, and the support plate 9 is made of aluminum alloy, so that the support plate 9 has high hardness and heat conductivity, and the support performance of the circuit board 2 is improved, and the heat dissipation performance is improved, so that the operation of the circuit board 2 is more stable. The inner cavity 10 of the metal shell 1 is arranged in front and back, and the opposite two side walls in the inner cavity 10 are provided with clamping grooves 11 for sliding clamping of the two side edges of the support plate 9 along the opening direction of the inner cavity 10, and the front and rear ports of the inner cavity 10 are provided with covers 12. Specifically, the plate surface of the support plate 9 is integrally provided with support columns 13 for supporting the circuit board 2 at four corner positions, and the four corners of the circuit board 2 are fixed to the end of the corresponding support column 13 by the first screw 14. The side wall of the inner cavity 10 is provided with four connecting columns 15 near the port, and the cover 12 is fixed to the end of the corresponding connecting column 15 by the second screw 16.

[0038] In order to further improve the disassembly efficiency and convenience of the circuit board 2, one of the covers 12 is fixed to the side edge of the support plate 9. In order to facilitate description, the cover 12 fixed to the support plate 9 is defined as a movable cover 17, and the movable cover 17 is fixed to the side edge of the support plate 9 by the third screw 18. The cover surface of the movable cover 17 is provided with at least one positioning column 19, and the side edge of the support plate 9 is provided with a positioning hole 20 for inserting the positioning column 19, so that the butt joint efficiency of the movable cover 17 and the support plate 9 is higher, and the connection of the two is more stable.

[0039] In order to improve the butt joint efficiency and convenience of the positioning column 19 and the positioning hole 20, the end of the positioning column 19 is provided with a hemispherical head 21.

[0040] In order to facilitate the external connection of the front and rear equipment of the POE power module, the input interface 3 and the output interface 6 are arranged at the front and rear ends of the circuit board 2 respectively, and the two covers 12 are provided with a first avoiding hole 22 and a second avoiding hole 23 respectively to expose the input interface 3 and the output interface 6.

[0041] The specific use process is as follows:

[0042] When installing the circuit board 2, first, the circuit board 2 is fixed to the support column 13 by the first screw 14, and then the positioning column 19 on the movable cover 17 is butted to the positioning hole 20 on the support plate 9 through the half ball head 21 to realize the pre-positioning of the movable cover 17 and the support plate 9. Then, the movable cover 17 and the support plate 9 are fixed and connected by the third screw 18. After the fixing is completed, the support plate 9 exceeding the two side edges of the circuit board 2 is respectively slid and clamped in the two clamping grooves 11 in the metal shell 1, and the support plate 9 is pushed into the inner cavity 10 of the metal shell 1. In this process, by the guiding action between the support plate 9 and the two clamping grooves 11, the movable cover 17 can be automatically pre-positioned with the port of the inner cavity 10. When the support plate 9 completely enters the inner cavity 10 of the metal shell 1, the movable cover 17 and the port of the inner cavity 10 complete the hole position calibration, at this time the movable cover 17 can be fixed to the opening of the inner cavity 10 by the second screw 16. Finally, the other cover 12 is fixed to the other port of the inner cavity 10 of the metal shell 1 by the second screw 16, and the installation of the circuit board 2 is completed.

[0043] When disassembling the circuit board 2, the above installation steps are performed in reverse.

Claims

1. A POE power module integrated with a filter module, characterized in that: The POE power module integrated with a filter module comprises a metal shell (1) and a circuit board (2) installed in the metal shell (1), and the circuit board (2) is integrated with an input interface (3), a filter module (4), a POE module (5) and an output interface (6) which are sequentially coupled. The circuit board (2) is arranged on a support plate (9), and an inner cavity (10) of the metal shell (1) is arranged in a front-rear direction, and opposite two side walls of the inner cavity (10) are provided with clamping grooves (11) for clamping two side edges of the support plate (9) along the opening direction of the inner cavity (10), and the front and rear two ports of the inner cavity (10) are provided with covers (12), and the cover surface of one of the covers (12) is fixed to the side edge of the support plate (9).

2. The POE power module integrated with a filter module according to claim 1, characterized in that: The filter module (4) comprises a differential mode filter circuit (7) and a common mode filter circuit (8) which are sequentially coupled, the input end of the differential mode filter circuit (7) is coupled to the output end of the input interface (3), and the output end of the common mode filter circuit (8) is coupled to the input end of the POE module (5).

3. The POE power module integrated with a filter module according to claim 2, characterized in that: The surface of the support plate (9) is provided with a plurality of support columns (13) for supporting the circuit board (2), and the circuit board (2) is fixed to the end of the support column (13) by a first screw (14).

4. The POE power sourcing module integrated with a filtering module of claim 1, wherein: The side wall of the inner cavity (10) is provided with a plurality of connecting columns (15) near the port, and the cover (12) is fixed to the end of the connecting column (15) by a second screw (16).

5. The POE power sourcing module integrated with a filtering module according to claim 1, characterized in that: The cover (12) fixed to the support plate (9) is defined as a movable cover (17), and the movable cover (17) is fixed to the side edge of the support plate (9) by a third screw (18).

6. The POE power sourcing module integrated with a filtering module according to claim 5, characterized in that: The cover surface of the movable cover (17) is provided with at least one positioning column (19), and the side edge of the support plate (9) is provided with a positioning hole (20) for inserting the positioning column (19).

7. The POE power module integrated with a filter module according to claim 6, wherein: The end of the positioning column (19) is provided with a hemispherical head (21).

8. The POE power module integrated with a filter module according to claim 1, wherein: The input interface (3) and the output interface (6) are arranged at the front and rear ends of the circuit board (2) respectively, and the two covers (12) are respectively provided with a first avoiding hole (22) and a second avoiding hole (23) for exposing the input interface (3) and the output interface (6) respectively.

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