Externally-mounted common mode inductor

Abstract

The utility model discloses an external hanging type common mode inductor, which relates to the technical field of common mode inductors and comprises a base, a square magnetic core is arranged on the base, a first coil and a second coil are respectively wound on two sides of the square magnetic core, the base comprises a square plate and four supporting blocks, and the four supporting blocks are respectively arranged on two side edges of the square plate in a rectangular shape and are integrally formed with the square plate. Pins are arranged in the supporting blocks, and the two ends of the first coil and the two ends of the second coil are correspondingly connected with the pins close to the first coil and the second coil respectively; according to the external mounting type common mode inductor, the bottom plate and the pins are improved, so that the external mounting type common mode inductor can be miniaturized and is easy to mount while high performance is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of common mode inductors, in particular to an external common mode inductor. Background Art

[0002] In electronic devices, inductors are a basic electronic component that is widely used in power management, signal processing, and electromagnetic interference suppression. In the prior art, the installation of inductors usually requires a large space. In applications with strict requirements on device size and assembly process, and with the trend of electronic devices towards higher performance and more compact design, new requirements are put forward for the shape, size, and installation method of inductors. Traditional inductors are difficult to meet the existing needs.

[0003] Therefore, there is a need for an inductor that can achieve higher space utilization efficiency and faster installation speed while meeting the stringent requirements of modern electronic devices on inductor performance and size. Utility Model Content

[0004] The utility model aims to provide an external common mode inductor, which can be made smaller and easier to install while maintaining high performance by improving a bottom plate and pins.

[0005] The above-mentioned optimized structure of the utility model is realized by the following technical scheme: an external common mode inductor, comprising a base, a square magnetic core is arranged on the base, a first coil and a second coil are respectively wound on both sides of the square magnetic core, the base comprises a square plate and four support blocks, the four support blocks are rectangularly arranged on both sides of the square plate, and are integrally formed with the square plate;

[0006] Pins are arranged in the support blocks, and the two ends of the first coil and the two ends of the second coil are respectively connected to the pins adjacent to themselves.

[0007] In some embodiments, the pin is L-shaped, with one end perpendicular to the side of the base and the other end passing through the support block and extending to the bottom of the support block.

[0008] In some embodiments, a mounting groove is provided on a side of the support block away from the square plate, the pin is provided in the mounting groove, and the two ends of the first coil and the two ends of the second coil and the pin connection points close to themselves protrude from the mounting groove.

[0009] In some embodiments, a partition is provided between the first coil and the second coil, a connecting seat is provided between the partition and the square plate, and the cross section of the connecting seat is an inverted triangular structure;

[0010] The connecting seat, the square plate and the partition are integrally formed.

[0011] In some embodiments, a first fixing groove and a second fixing groove are symmetrically provided on the top of the square plate, the first fixing groove is provided with the first coil, and the second fixing groove is provided with the second coil.

[0012] In some embodiments, cross sections of the first coil and the second coil are both flat structures.

[0013] In some embodiments, limit blocks are provided at the connections between the square plate and the four support blocks.

[0014] In some embodiments, heat dissipation grooves are provided at both ends of the first fixing groove and the second fixing groove, and the bottom walls of the heat dissipation grooves are higher than the bottom walls of the first fixing groove and the second fixing groove.

[0015] In summary, the utility model has the following beneficial effects:

[0016] This type of external common-mode inductor designs the pins into an L shape and embeds them into the support block, so that the inductor can be quickly and stably inserted flatly on the circuit board, so that it can meet the power supply design requirements with limited space or height, thereby improving the overall compactness and aesthetics of the product; at the same time, it reduces assembly time and improves production efficiency. A first fixing groove and a second fixing groove are set on the base, and the overall height is reduced by reducing the installation height of the coil on the bottom plate, thereby achieving miniaturization, and providing fixation and protection for the first coil and the second coil to prevent the coil from shifting or being damaged during transportation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a structural diagram of the utility model in which the pins are installed on the base.

[0019] In the figure: 1. base; 11. square plate; 12. support block; 2. square magnetic core; 3. first coil; 4. second coil; 5. pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] refer to Figure 1-2A plug-in common-mode inductor includes a base 1, a square magnetic core 2 is provided on the base 1, a first coil 3 and a second coil 4 are respectively wound on both sides of the square magnetic core 2, the base 1 includes a square plate 11 and four support blocks 12, the four support blocks 12 are rectangular and arranged on both sides of the square plate 11, and are integrally formed with the square plate 11, thereby ensuring the structural strength of the base 1; pins 5 are provided in the support blocks 12, and both ends of the first coil 3 and the second coil 4 are respectively connected to the pins 5 close to themselves.

[0022] Pin 5 can be L-shaped, with one end perpendicular to the side of the base 1, so that the inductor can be quickly and stably inserted flatly on the circuit board, so that it can meet the power supply design requirements with limited space or height restrictions, thereby improving the overall compactness and aesthetics of the product; one end passes through the support block 12 and extends to the bottom of the support block 12, which can increase the connection height of the inductor when it is directly inserted into the circuit board, and at the same time facilitate positioning during installation.

[0023] In some embodiments, a mounting groove is provided on the side of the support block 12 away from the square plate 11, and a pin 5 is provided in the mounting groove, which can realize the embedded installation of the pin 5, improve the connection strength between the pin 5 and the support block 12, and prevent the pin 5 from being deformed by force; the two ends of the first coil 3 and the two ends of the second coil 4 and the connection points of the pin 5 close to themselves protrude from the mounting groove.

[0024] In some embodiments, a partition is provided between the first coil 3 and the second coil 4, which can reduce the interference between the first coil 3 and the second coil 4, improve the electromagnetic compatibility of the inductor, and reduce interference to surrounding circuits; a connecting seat is provided between the partition and the square plate 11, and the cross-section of the connecting seat is an inverted triangular structure; the two sides of the connecting seat can also be concave arc surfaces, which can be adapted to the shapes of the two coils, reducing the gap between the two coils and the connecting seat, so that the two coils are firmly installed on the base 1, the structure is compact, and the overall volume of the inductor is reduced; the connecting seat, the square plate 11 and the partition are integrally formed to ensure structural strength and facilitate installation.

[0025] In some embodiments, a first fixing groove and a second fixing groove are symmetrically provided on the top of the square plate 11. The first fixing groove is provided with a first coil 3, and the second fixing groove is provided with a second coil 4, which can fix and protect the coils to prevent displacement or damage of the coils during transportation and use.

[0026] In some embodiments, the cross-sections of the first coil 3 and the second coil 4 are both flat structures, and the turns can be tightly flat on the premise of ensuring the number of turns of the first coil 3 and the second coil 4, thereby increasing the effective cross-sectional area of ​​the wire and making full use of the limited assembly space of the magnetic core to achieve the lowest DCR under the same volume, reduce the copper loss of the product, increase the temperature rise current of the product, and reduce the space occupied by the coil. Both ends of the first coil 3 and the second coil 4 extend directly from the winding direction to their respective corresponding pins, and each connecting segment of the coil can be connected to the pin in the shortest way, further ensuring the compact and neat structure of the inductor, avoiding contact with adjacent components during production, packaging, transportation or use while retaining redundant wire segments or wire ends, and reducing the probability of mutual interference and damage.

[0027] In some embodiments, limit blocks are provided at the connection points between the square plate 11 and the four support blocks 12 to limit the movement of the first coil 3 and the second coil 4 in the axial direction.

[0028] In some embodiments, heat dissipation grooves are provided at both ends of the first fixed groove and the second fixed groove, and the bottom walls of the heat dissipation grooves are higher than the bottom walls of the first fixed groove and the second fixed groove, which can improve the heat dissipation effect of the first coil 3 and the second coil 4, enhance the thermal stability of the inductor under high load, and ensure the reliability and life of the inductor during long-term operation.

[0029] In summary, the utility model designs the pin into an L shape and embeds the support block 12, so that the inductor can be quickly and stably inserted flatly on the circuit board, so that it can meet the design requirements of power supplies with limited space or height, thereby improving the overall compactness and aesthetics of the product; at the same time, it reduces assembly time and improves production efficiency. A first fixing groove and a second fixing groove are set on the base 1, and the overall height is reduced by reducing the installation height of the coil on the bottom plate 1, thereby achieving minimization, and providing fixation and protection for the first coil 3 and the second coil 4 to prevent displacement or damage of the coil during transportation and use.

[0030] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 embodiments of the present invention.

Claims

1. An external common-mode inductor, comprising a base (1), wherein a square magnetic core (2) is provided on the base (1), and a first coil (3) and a second coil (4) are respectively wound on two sides of the square magnetic core (2), characterized in that: The base (1) comprises a square plate (11) and four support blocks (12); the four support blocks (12) are rectangular and arranged on two sides of the square plate (11), and are integrally formed with the square plate (11); The support block (12) is provided with pins (5), and the two ends of the first coil (3) and the two ends of the second coil (4) are respectively connected to the pins (5) adjacent to themselves.

2. The external common mode inductor according to claim 1, characterized in that: The pin (5) is L-shaped, with one end being perpendicular to the side of the base (1) and the other end penetrating the support block (12) and extending to the bottom of the support block (12).

3. The external common mode inductor according to claim 1, characterized in that: A mounting groove is provided on a side of the support block (12) away from the square plate (11), the pin (5) is provided in the mounting groove, and the two ends of the first coil (3) and the two ends of the second coil (4) protrude from the mounting groove with the connection points of the pin (5) close to the first coil (3) and the second coil (4).

4. The external common mode inductor according to claim 1, characterized in that: A partition is provided between the first coil (3) and the second coil (4), a connecting seat is provided between the partition and the square plate (11), and the cross section of the connecting seat is an inverted triangular structure; The connecting seat, the square plate (11) and the partition are integrally formed.

5. The external common mode inductor according to claim 1, characterized in that: A first fixing groove and a second fixing groove are symmetrically provided on the top of the square plate (11); the first fixing groove is provided with the first coil (3); and the second fixing groove is provided with the second coil (4).

6. The external common mode inductor according to claim 1, characterized in that: The cross sections of the first coil (3) and the second coil (4) are both flat structures.

7. The external common mode inductor according to claim 1, characterized in that: Limit blocks are provided at the connection points between the square plate (11) and the four support blocks (12).

8. The external common mode inductor according to claim 5, characterized in that: Both ends of the first fixing groove and the second fixing groove are provided with heat dissipation grooves, and the bottom walls of the heat dissipation grooves are higher than the bottom walls of the first fixing groove and the second fixing groove.

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