Common mode inductor

Abstract

The utility model discloses a common-mode inductor, which belongs to the technical field of common-mode inductors and comprises a base and screws, a fixing plate is arranged at the top of the base, side plates are arranged at two ends of the surface of the fixing plate, and a magnetic column and an inductance coil are arranged between the side plates. According to the utility model, through the arrangement of the connecting piece, during use, current is conducted to the copper column in the slot from the contact plate and then conducted to the inductance coil through the copper column, the inductance coil does not need to be directly welded with a bonding pad so as to support the disassembly of the fixed plate, and through the arrangement of the fixed plate, a maintainer can hold the side plate and pull out the fixed plate by hands after disassembling screws, so that the maintenance is convenient. And then the intact fixing plate is inserted into the positioning clamping groove through the positioning clamping block and is fixed by using the screw again, and a desoldering process is not needed to be used for dismounting, so that the situation that the circuit board or the common mode inductor cannot work normally due to welding errors is avoided, and meanwhile, the dismounting and mounting difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of common mode inductor technology, and in particular to a common mode inductor. Background Technology

[0002] Common mode inductors, also called common mode chokes, are used to filter common mode electromagnetic interference signals, including surface mount common mode inductors.

[0003] Existing surface-mount common-mode inductors require soldering to the pads on the circuit board. However, when a common-mode inductor fails, it needs to be desoldered to remove it from the circuit board surface, then replaced with a working common-mode inductor and resoldered. If soldering errors occur during the resoldering process, resulting in problems such as cold solder joints or solder slag, it will damage the circuit board. At the same time, the replacement method of desoldering and then resoldering is cumbersome and inconvenient.

[0004] To address this issue, a common-mode inductor is proposed. Utility Model Content

[0005] The purpose of this invention is to solve the problem of cumbersome installation and removal of common mode inductors in the prior art, and to propose a common mode inductor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A common-mode inductor includes a base and screws. A fixing plate is provided on the top of the base, and side plates are provided at both ends of the surface of the fixing plate. A magnetic post and an inductor coil are provided between the side plates.

[0008] Preferably, the base has mounting grooves at its four corners, and connectors are fixedly installed in the mounting grooves. The surface of the base has screw holes and positioning slots.

[0009] Preferably, the connector has a slot at its top and a contact plate fixedly connected to its bottom.

[0010] Preferably, the surface of the fixing plate is provided with a through hole for matching screw holes, and a plurality of copper pillars for matching slots are fixedly connected to the surface of the fixing plate. The bottom of the fixing plate is provided with a positioning block for matching positioning slots, and the positioning block engages with the positioning slots.

[0011] Preferably, the copper pillar is positioned downwards with its top exposed, the top of the copper pillar is welded to the bottom of the inductor coil, and the bottom of the copper pillar is inserted into the slot.

[0012] Preferably, the screw passes through the through hole and is threaded into the screw hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by setting up a connector, allows the current to be conducted from the contact plate to the copper pillar in the slot during use, and then from the copper pillar to the inductor coil. This achieves the function of electrical conduction without the need to solder the inductor coil to the circuit board, thus achieving the effect of easy disassembly.

[0015] 2. By setting a fixing plate, maintenance personnel can pinch the side plate and pull out the fixing plate by hand after removing the screws. Then, the intact fixing plate is inserted into the positioning slot through the positioning block and fixed with screws again. There is no need to use the desoldering process to remove it, which avoids the circuit board or common mode inductor from failing to work properly due to welding errors. At the same time, it reduces the difficulty of disassembly and installation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a common-mode inductor proposed in this utility model;

[0017] Figure 2 This is a three-dimensional structural assembly drawing of a common-mode inductor proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fixing plate in a common mode inductor proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the base and connector in a common-mode inductor proposed in this utility model.

[0020] In the diagram: 1. Base; 2. Screw; 3. Fixing plate; 4. Side plate; 5. Magnetic column; 6. Inductor coil; 7. Mounting slot; 8. Connector; 9. Screw hole; 10. Positioning slot; 11. Slot; 12. Contact plate; 13. Through hole; 14. Copper column; 15. Positioning block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-4 A common-mode inductor includes a base 1 and screws 2. A fixing plate 3 is provided on the top of the base 1. Side plates 4 are provided at both ends of the surface of the fixing plate 3. A magnetic column 5 and an inductor coil 6 are provided between the side plates 4.

[0023] Furthermore, mounting grooves 7 are provided at the four corners of the base 1, and connectors 8 are fixedly installed in the mounting grooves 7. Screw holes 9 and positioning slots 10 are provided on the surface of the base 1.

[0024] Furthermore, a slot 11 is provided on the top of the connector 8, and a contact plate 12 is fixedly connected to the bottom of the connector 8.

[0025] A further advantage of the above is that after the contact plate 12 is soldered to the pads of the circuit board in the prior art, the current is conducted to the copper pillar 14 through the connector 8, and then conducted to the inductor coil 6 by the copper pillar 14. The function of electrical conduction is achieved without soldering the inductor coil 6 to the circuit board, thereby achieving the effect of easy disassembly.

[0026] Furthermore, the surface of the fixing plate 3 is provided with through holes 13 that match screw holes 9, and a number of copper pillars 14 with matching slots 11 are fixedly connected to the surface of the fixing plate 3. The bottom of the fixing plate 3 is provided with positioning blocks 15 that match positioning slots 10. The positioning blocks 15 are engaged with the positioning slots 10. The copper pillars 14 are set downward and exposed at the top. The top of the copper pillars 14 is welded to the bottom of the inductor coil 6, and the bottom of the copper pillars 14 is inserted into the slots 11.

[0027] A further advantage of the above approach is that when the inductor coil 6 or the magnetic column 5 needs to be replaced due to a fault, the maintenance personnel can remove the screw 2, hold the side plate 4 by hand, and pull out the fixing plate 3. Then, the intact fixing plate 3 is inserted into the positioning slot 10 through the positioning block 15 and fixed again with the screw 2. This eliminates the need for desoldering process, avoids soldering errors that could cause the circuit board or common mode inductor to malfunction, and reduces the difficulty of disassembly and installation.

[0028] Furthermore, screw 2 passes through through hole 13 and is threaded into screw hole 9 to fix fixing plate 3 to the surface of base 1 to increase stability during use.

[0029] During installation, the fixing plate 3 is inserted into the positioning slot 10 through the positioning block 15, so that the through hole 13 is aligned with the screw hole 9. The screw 2 is threaded through the through hole 13 and threaded into the screw hole 9 to make the fixing plate 3 more secure and prevent it from shaking during use. Finally, the contact plate 12 is welded to the circuit board in the prior art through the welding process to complete the installation.

[0030] In this state, the copper pillar 14 at the bottom of the fixing plate 3 is inserted into the slot 11 of the connector 8, so that the current of the circuit board can be conducted through the connector 8 to the copper pillar 14, and then conducted by the copper pillar 14 to the inductor coil 6, so that the inductor coil 6 can work normally without being soldered to the circuit board.

[0031] When the inductor coil 6 or the magnetic column 5 needs to be replaced due to a fault, the repairman removes the screw 2 with a screwdriver, holds the side plate 4 by hand and pulls out the fixing plate 3, so that the copper column 14 is removed from the slot 11 of the connector 8. The fixing plate 3 can be removed without desoldering. When replacing, the intact fixing plate 3 is inserted into the positioning slot 10 through the positioning block 15. After insertion, the through hole 13 is aligned with the screw hole 9 by the combined action of the positioning block 15 and the positioning slot 10. Finally, the fixing plate 3 is fastened to the base 1 again with the screw 2 to complete the replacement, which realizes the function of convenient disassembly and installation.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A common-mode inductor, comprising a base (1) and a screw (2), characterized in that, The base (1) is provided with a fixing plate (3) at the top, and side plates (4) are provided at both ends of the surface of the fixing plate (3). A magnetic column (5) and an inductor coil (6) are provided between the side plates (4). The base (1) has mounting grooves (7) at its four corners, and a connector (8) is fixedly installed in the mounting groove (7). The connector (8) has a slot (11) at its top and a contact plate (12) fixedly connected to its bottom. The base (1) has screw holes (9) and positioning slots (10) on its surface.

2. A common-mode inductor according to claim 1, characterized in that: The surface of the fixing plate (3) is provided with a through hole (13) with matching screw holes (9), and a copper pillar (14) with multiple matching slots (11) is fixedly connected to the surface of the fixing plate (3). The bottom of the fixing plate (3) is provided with a positioning block (15) with a matching positioning slot (10), and the positioning block (15) is engaged with the positioning slot (10).

3. A common-mode inductor according to claim 2, characterized in that: The copper pillar (14) is positioned downwards with its top exposed. The top of the copper pillar (14) is welded to the bottom of the inductor coil (6), and the bottom of the copper pillar (14) is inserted into the slot (11).

4. A common-mode inductor according to claim 2, characterized in that: The screw (2) passes through the through hole (13) and is threaded into the screw hole (9).

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