Vertical surface mount common mode coil

Abstract

A vertical surface mount common mode coil comprises an inner iron core body ring; each coil winding is provided with a coil part and two pin parts, and the coil parts are annularly arranged on the two opposite sides of the inner iron core body ring respectively; the outer iron core body frame is provided with a containing space, at least one face of the containing space is communicated with the external space so as to contain the inner iron core body ring and the coil windings, the outer iron core body frame is provided with a plurality of pin grooves communicated with the containing space respectively, and the pin parts extend into the pin grooves respectively. According to the utility model, the outer iron core body frame is used as the support of the common-mode coil, so that the manufacturing procedure of manufacturing the surface-mounted common-mode inductor can be simplified, the exposed electromagnetic field is reduced, the internal common-mode coil can be installed in an upright manner, the occupied circuit board area is reduced, and the power density is increased.

Description

Technical Field

[0001] The utility model relates to a vertical surface-mount common-mode coil, in particular to a vertical surface-mount common-mode coil in which a common-mode coil is installed in an outer iron core body frame. Background Art

[0002] Nowadays, computer technology is developed. In order to be able to transmit information at high speed, various high-frequency signals are needed to transmit information. However, in order to filter out noise and reduce external electromagnetic radiation, various filters are needed. The common-mode coil is a component commonly used in filter circuits, and noise and external electromagnetic radiation can be eliminated through two coils with the same number of turns and the same phase.

[0003] However, common-mode coils are usually made of thinner wire diameters and require other support structures to assist. For example, in Figure 2 Taiwan Patent Certificate No. I609386 in China, a body is used to accommodate two coils. However, the body is usually made of plastic material and only serves as a support structure and cannot provide performance in terms of electronic circuits. Additionally, most of the common-mode coils in the prior art are through-hole packages, and the circuit board must be drilled to allow the pins to pass through, which also takes longer installation time compared to surface-mount (SMT) packages.

[0004] In view of this, the inventor has accumulated years of research and practical experience in related fields and specifically created a vertical surface-mount common-mode coil to improve the above-mentioned deficiencies of the prior art. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a vertical surface-mount common-mode coil. An outer iron core body frame is installed outside the common-mode coil. The outer iron core body frame can reduce the electromagnetic field leaked from the utility model and also facilitate the production of the common-mode coil in the form of surface-mount packaging.

[0006] To achieve the above purpose, the vertical surface-mount common-mode coil of the utility model includes an inner iron core body ring; two coil windings, each having a coil part and two lead parts, and each coil part is respectively disposed around opposite sides of the inner iron core body ring; and an outer iron core body frame, which has an accommodation space with at least one side communicating with the external space to accommodate the inner iron core body ring and each coil winding. The outer iron core body frame has a plurality of lead slots respectively communicating with the accommodation space, and each lead part extends into each lead slot. The inner iron core body ring and the outer iron core body frame can be made of the same or different materials. The outer iron core body frame can reduce the magnetic field leaked from the utility model to the outside and improve the performance of the common-mode coil, which is different from the plastic body in the prior art that only has a support function.

[0007] In one embodiment, the bottom surface of the outer iron core body frame forms a flat surface, and each pin slot is respectively arranged on the bottom surface of the outer iron core body frame. At least one side surface of the accommodating space communicates with the external space. The inner iron core body ring has a central hole and the central hole faces horizontally, so that the inner iron core body ring presents an upright posture. The flat bottom surface enables the present utility model to erect and install the common mode coil on the circuit board, reducing the area of the circuit board occupied by the common mode coil and increasing the power density.

[0008] Depending on the component effect and the circuit board space requirements, the outer iron core body frame can also be connected as an open type on the opposite two sides, that is, the opposite two side surfaces of the accommodating space communicate with the external space, with one side wall missing, making the width occupied by the present utility model smaller.

[0009] The inner iron core body ring can be a circular ring, a square ring, or a ring of other shapes according to the component performance requirements. Each pin slot can be respectively provided with a plating electrode part, and each plating electrode part is electrically connected to each pin part; the plating electrode part can be made by electroplating, enabling the present utility model to have good electrical contact when welded to the circuit board.

[0010] The present utility model can be changed to a horizontal installation. At this time, the bottom surface of the accommodating space communicates with the external space. The outer iron core body frame has a plurality of pin slots on the opposite two sides of the bottom surface of the accommodating space. The inner iron core body ring has a central hole and the central hole faces the vertical direction; in this embodiment, it is installed in the direction with the accommodating space facing downwards, and each pin slot is respectively arranged on the opposite two sides; this embodiment can also have the bottom surface and the top surface of the accommodating space communicating with the external space, that is, the thickness of the upper cover is missing, reducing the height of this embodiment.

[0011] Please note that the inner iron core body in this article is a common part name of the inductance component and is not limited to iron-containing materials.

[0012] The beneficial effects of the present utility model are as follows:

[0013] Using the outer iron core body frame as the support of the common mode coil can simplify the manufacturing process of the surface-mounted common mode inductor, reduce the external leakage electromagnetic field, and enable the internal common mode coil to be installed in an upright manner, reducing the area occupied on the circuit board and increasing the power density.

[0014] In order to clearly and fully disclose the present utility model, preferred embodiments are enumerated with illustrations to describe its implementation details as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional view of Embodiment (1) of the present utility model;

[0016] Figure 2 is Figure 1 another angle of

[0017] Figure 3Bottom view of Embodiment (1) of the present utility model;

[0018] Figure 4 Stereogram of Embodiment (2) of the present utility model;

[0019] Figure 5 Another angle of the fourth figure;

[0020] Figure 6 Bottom view of Embodiment (3) of the present utility model.

[0021] Explanation of reference numerals in the drawings

[0022] 1. Inner iron core body ring

[0023] 11. Central hole;

[0024] 2. Coil winding;

[0025] 21. Coil part;

[0026] 22. Lead foot part;

[0027] 3. Outer iron core body frame;

[0028] 31. Accommodating space;

[0029] 32. Lead foot groove;

[0030] 4. Electroplating electrode part. Detailed implementation manners

[0031] Please refer to Figures 1 to 3 , the drawings showing the embodiments of the present utility model are disclosed. As shown in the above drawings, Embodiment (1) of the vertical surface-mounted common-mode coil of the present utility model includes an inner iron core body ring 1; two coil windings 2, each having a coil part 21 and two lead foot parts 22. Each coil part 21 is respectively disposed on opposite sides of the inner iron core body ring 1, Figure 1 wherein the opposite sides refer to the left and right sides in the figure; and an outer iron core body frame 3, which has an accommodating space 31 that communicates with the external space on at least one side to accommodate the inner iron core body ring 1 and each coil winding 2. The outer iron core body frame 3 has a plurality of lead foot grooves 32 that respectively communicate with the accommodating space 31, and each lead foot part 22 extends into each lead foot groove 32. Each coil winding 2 has the same number of turns and phase to form a common-mode coil.

[0032] In Embodiment (1), the outer iron core body frame 3 is a square frame. The outer iron core body frame 3 is arranged in an upright manner, so that the bottom surface of the outer iron core body frame 3 forms a plane, and it stands upright on the circuit board. Each pin slot 32 is respectively arranged on the bottom surface of the outer iron core body frame 3. At least one side surface of the accommodating space 31 communicates with the external space. The inner iron core body ring 1 and the outer iron core body frame 3 also stand on the circuit board. The inner iron core body ring 1 has a central hole 11 and the central hole 11 faces horizontally, so that the inner iron core body ring 1 presents an upright posture. The inner iron core body ring 1 and the outer iron core body frame 3 can be made of the same or different materials. The outer iron core body frame 3 can reduce the magnetic field leaked from the present invention outward and improve the performance of the common mode coil, which is different from the plastic seat body in the prior art that only has a supporting function. The bottom surface being a plane enables Embodiment (1) to stand the common mode coil upright and install it on the circuit board, reducing the area of the circuit board occupied by the common mode coil and increasing the power density.

[0033] The inner iron core body ring 1 can be a circular ring, a square ring or a ring of other shapes according to the performance requirements of the components. Each pin slot 32 can be respectively provided with a plating electrode part 4, and each plating electrode part 4 is electrically connected to each pin part 22; the plating electrode part 4 can be made by electroplating, so that the present invention is welded and installed on the circuit board in the form of a surface mount device (SMD), and it also has good electrical contact when the present invention is welded to the circuit board. If necessary, epoxy resin can also be filled between the inner iron core body ring 1 and the outer iron core body frame 3 to fix the inner iron core body ring 1.

[0034] Depending on the component effect and the circuit board space requirements, the outer iron core body frame 3 can also be connected in an open manner on the opposite two sides, such as in Figures 4 to 5 In this case, the opposite two side surfaces of the accommodating space 31 of Embodiment (2) of the present invention communicate with the external space. Therefore, the internal inner iron core body ring 1 and each coil winding 2 can be seen from both sides, and the thickness of one side wall is also reduced, making the width occupied by the present invention smaller.

[0035] Figure 6 In this case, it can be seen that Embodiment (3) of the present invention is changed to a horizontal installation, so it is presented in a bottom view. At this time, the bottom surface of the accommodating space 31 communicates with the external space. The outer iron core body frame 3 has a plurality of pin slots 32 on the opposite two sides of the bottom surface of the accommodating space 31. The inner iron core body ring 1 has a central hole 11 and the central hole 11 faces vertically. Embodiment (3) is installed with the accommodating space 31 facing downward, and each pin slot 32 is respectively arranged on the opposite two sides; Embodiment (3) can also communicate the bottom surface and the top surface of the accommodating space 31 with the external space, that is, the thickness of the upper cover part is reduced, reducing the height of Embodiment (3). In Embodiment (3), the inner iron core body ring 1 lies horizontally in the outer iron core body frame 3, and the central axes of each coil winding 2 will be parallel to the bottom surface of the outer iron core body frame 3.

[0036] However, as described above, it is only a preferred embodiment of the present utility model and cannot be used to limit the scope of implementation of the present utility model. Any obvious changes and modifications made by those skilled in the art should be regarded as not departing from the essential content of the present utility model.

Claims

1. A vertical surface-mounted common mode coil, characterized in that, Comprising: An inner iron core body ring; Two coil windings, each having a coil portion and two connecting feet, and the coil portions are respectively disposed around opposite sides of the inner iron core body ring; and An outer iron core body frame having an accommodating space with at least one side communicating with the external space to accommodate the inner iron core body ring and each coil winding, and the outer iron core body frame has a plurality of connecting foot slots respectively communicating with the accommodating space, and each connecting foot extends into each connecting foot slot respectively.

2. The vertical surface-mount common-mode coil according to claim 1, wherein The bottom surface of the outer iron core body frame forms a plane, each connecting foot slot is respectively disposed on the bottom surface of the outer iron core body frame, at least one side surface of the accommodating space communicates with the external space, the inner iron core body ring has a central hole, and the central hole faces horizontally.

3. The vertical surface-mount common-mode coil according to claim 2, wherein, Opposite side surfaces of the accommodating space communicate with the external space.

4. The vertical surface-mounted common-mode coil according to claim 1, wherein, The bottom surface of the accommodating space communicates with the external space, the outer iron core body frame has a plurality of connecting foot slots respectively on opposite sides of the bottom surface of the accommodating space, the inner iron core body ring has a central hole, and the central hole faces vertically.

5. The vertical surface-mount common-mode coil according to claim 4, wherein The bottom surface and the top surface of the accommodating space communicate with the external space.

6. The vertical surface-mounted common-mode coil according to any one of claims 1 to 5, characterized in that, The inner iron core body ring is a circular ring.

7. The vertical surface-mount common-mode coil according to any one of claims 1 to 5, characterized in that The inner iron core body ring is a square ring.

8. The vertical surface-mount common-mode coil according to any one of claims 1 to 5, characterized in that, Each connecting foot slot is respectively provided with a plating electrode portion, and each plating electrode portion is respectively electrically connected to each connecting foot.

Images