Annular common mode choke

Abstract

The utility model provides an annular common mode inductor. The annular common mode inductor comprises a magnetic core, a base and a coil. The magnetic core is fixed on the base; the lower part of the base is connected with pins; the coil is wound on the magnetic core; wherein a connecting piece penetrating through the plate surface of the base is mounted on the base, and the pin is electrically connected with a lead of the coil through the connecting piece; the connecting piece comprises a first connecting part and a second connecting part; the first connecting part is matched with the lead in thickness; the top ends of the pins are sleeved with first rubber rings. The pin sleeved with the first rubber ring is matched with the second connecting part; the diameter of an outlet at the lower end of the second connecting part is smaller than that of the first rubber ring; the diameter of the outlet at the lower end of the connecting piece on the base is smaller than the diameter of the first rubber ring arranged on the pin in a sleeving mode, the pin can be clamped in the connecting piece through the elasticity of the first rubber ring, therefore, detachable connection between the base and the pin can be achieved, the pin on the common mode inductor can be recycled and reused, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical components, in particular to a toroidal common-mode inductor. Background Art

[0002] With the development of science and technology, electronic devices are becoming smaller and smaller, which leads to a higher degree of circuit integration in electronic devices. Electromagnetic interference is prone to occur between circuits, and inductors are devices that effectively suppress electromagnetic interference. Inductors are mainly composed of coils, magnetic cores or iron cores, and pins.

[0003] The toroidal common mode inductor is a special type of inductor whose coil is symmetrically wound around a magnetic ring to form a closed toroidal structure. This design helps to suppress common mode interference by increasing the inductance value when common mode interference occurs, while having less impact on differential mode signals.

[0004] In the prior art, the common mode inductor generally includes a base, a magnetic core, a conductive coil and pins arranged at the bottom of the base. The magnetic core is fixed to the base by dispensing glue, and the leads at both ends of the conductive coil are electrically connected to the pins. Since the base and the pins are usually installed in a fixed connection manner, a large number of pins need to be purchased during production, which increases the production cost to a certain extent. Therefore, the problem of pin recycling needs to be effectively handled. Utility Model Content

[0005] The utility model aims to provide a toroidal common mode inductor to solve the problem that the fixed connection method between the base and the pins proposed in the above background technology leads to the need to purchase a large number of pins during production, which increases the production cost to a certain extent.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A toroidal common mode inductor comprises a magnetic core, a base and a coil;

[0008] The magnetic core is fixed on the base;

[0009] A pin is connected below the base;

[0010] The coil is wound on the magnetic core;

[0011] Wherein, a connector penetrating the board surface is installed on the base, and the pin is electrically connected to the lead wire of the coil through the connector;

[0012] The connecting member includes a first connecting portion and a second connecting portion;

[0013] The first connecting portion is adapted to the thickness of the lead wire;

[0014] A first rubber ring is sleeved on the top of the pin; and the pin sleeved with the first rubber ring is adapted to the second connecting portion;

[0015] The outlet diameter of the lower end of the second connecting portion is smaller than the diameter of the first rubber ring.

[0016] Preferably, a second rubber ring is provided on the outlet at the lower end of the second connecting portion.

[0017] Preferably, a limiting component for limiting the movement of the lead is provided in the pin.

[0018] Preferably, the limiting assembly comprises elastic protrusions arranged on both sides of the inner wall of the second connecting portion, and the distance between the two elastic protrusions is smaller than the diameter of the lead wire.

[0019] Preferably, the coil comprises a first coil and a second coil, and the first coil and the second coil are symmetrically wound on two sides of the magnetic core.

[0020] Preferably, it also includes a spacer;

[0021] The spacer includes a first spacer and a second spacer;

[0022] The first spacer ring and the second spacer ring are respectively arranged at the interval between the first coil and the second coil.

[0023] Preferably, the base is provided with a groove matched with the cross-sectional size of the spacer ring.

[0024] Preferably, a base is provided on the pedestal, and a groove matching with the magnetic core is formed on the base.

[0025] Preferably, an insulating coating is provided on the surface of the magnetic core.

[0026] Compared with the prior art, the utility model has the following beneficial effects: the diameter of the lower end outlet of the connector on the base is smaller than the diameter of the rubber ring sleeved on the pin, so that the pin can be clamped in the connector by utilizing the elasticity of the rubber ring; when the pin needs to be recovered, the pin is pulled outward so that the rubber ring is deformed by the pressure from the lower end outlet of the connector, thereby taking out the pin 4; thereby, a detachable connection between the base and the pin can be achieved, so that the pin on the common mode inductor can be recovered and reused, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the connection between the connector and the pins and leads of the embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the overall structure of the base of the utility model embodiment;

[0031] Figure 4 It is a bottom view of the second connecting portion of an embodiment of the utility model.

[0032] Figure numerals: 1, magnetic core; 2, base; 21, groove; 3, coil; 4, pin; 41, first rubber ring; 5, connector; 51, first connecting part; 52, second connecting part; 521, second rubber ring; 6, lead wire; 7, elastic bump; 8, spacer; 9, base. DETAILED DESCRIPTION

[0033] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships conventionally placed when the product of the present invention is used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0038] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 4 As shown, the embodiment of the utility model provides a toroidal common mode inductor, comprising a magnetic core 1, a base 2 and a coil 3;

[0040] The magnetic core 1 is fixed on the base 2.

[0041] Specifically, the magnetic core 1 is annular. Under the condition of achieving the same functions and characteristics, and compared with square or other shapes, the annular magnetic core can facilitate the winding of the conductive coil and improve the production efficiency;

[0042] A pin 4 is connected below the base 2;

[0043] The coil 3 is wound on the magnetic core 1;

[0044] The base 2 is provided with a connector 5 penetrating the board surface thereof, and the pin 4 is electrically connected to the lead wire 6 of the coil 3 through the connector 5;

[0045] The connecting member 5 is narrow at the top and wide at the bottom, and includes a first connecting portion 51 and a second connecting portion 52;

[0046] The first connecting portion 51 is adapted to the thickness of the lead wire 6;

[0047] A first rubber ring 41 is sleeved on the top of the pin 4; and the pin 4 sleeved with the first rubber ring 41 is adapted to the second connecting portion 52;

[0048] The outlet diameter of the lower end of the second connecting portion 52 is smaller than the diameter of the first rubber ring 41 .

[0049] Specifically, the coil 3 includes a first coil and a second coil, and the first coil and the second coil are symmetrically wound on two sides of the magnetic core 1 .

[0050] More specifically, the coil 3 is wound in a single layer, which can reduce the parasitic capacitance of the coil 3 and enhance the ability of the coil 3 to withstand transient overvoltage.

[0051] By making the diameter of the lower end outlet of the connecting piece 5 on the base 2 smaller than the diameter of the first rubber ring 41 sleeved on the pin 4, the pin 4 can be clamped in the connecting piece 5 by utilizing the elasticity of the first rubber ring 41; when the pin 4 needs to be recovered, the pin 4 is pulled outward so that the first rubber ring 41 is deformed by the pressure of the lower end outlet of the second connecting portion 52, thereby taking out the pin 4, thereby realizing a detachable connection between the base and the pin, so that the pin on the common mode inductor can be recovered and reused, thereby reducing the production cost.

[0052] When in use, the pin 4 is clamped in the second connection portion 52 , and the lead wire 6 of the coil 3 is extended from the entrance of the first connection portion 51 into the interior thereof to be electrically connected to the pin 4 .

[0053] The lead wires 6 are connected to the corresponding pins 4 via the connector 5, which can effectively prevent the lead wires from being entangled with each other.

[0054] In order to prevent the pin 4 from rubbing against the outlet of the connector 5 during the clamping or pulling process, thereby preventing the pin 4 from being worn, a second rubber ring 521 is provided on the outlet at the lower end of the second connecting portion 52 .

[0055] Furthermore, in order to prevent the lead wire 6 from moving axially along the connector 5 and ensure the stability of the connection, a limiting component for limiting the movement of the lead wire 6 is provided in the pin 4 .

[0056] Specifically, the limiting assembly includes elastic protrusions 7 arranged on both sides of the inner wall of the second connecting portion 52, the elastic protrusions 7 have good elasticity, and the distance between the two elastic protrusions 7 is smaller than the diameter of the lead 6 to ensure that the lead 6 can be firmly limited by the elastic protrusions 7.

[0057] The lead wire 6 is inserted from the entrance of the first connection part 51 until it is connected with the pin 4 clamped on the second connection part 52. The elastic protrusion 7 is compressed due to being squeezed, so that the two elastic protrusions 7 exert pressure on the lead wire 6, thereby achieving positioning.

[0058] Further, it also includes a spacer 8;

[0059] The spacer 8 includes a first spacer and a second spacer;

[0060] The first spacer and the second spacer are respectively arranged at the interval between the first coil and the second coil to physically separate the first coil from the second coil.

[0061] In order to limit the magnetic core 1 , a groove 21 matching the cross-sectional size of the spacer ring 8 is formed on the base 2 .

[0062] When in use, the spacer ring 8 is placed in the groove 21 to prevent the magnetic core 1 connected to the spacer ring 8 from shifting.

[0063] Furthermore, a base 9 is provided on the base 2 , and a groove matching with the magnetic core 1 is formed on the base 9 , so that the magnetic core 1 can fit better with the base 9 , thereby ensuring the stability of the magnetic core 1 .

[0064] Since insulation treatment is required between the magnetic core 1 and the coil 3, an insulating coating is provided on the surface of the magnetic core 1 to prevent breakdown between the magnetic core 1 and the coil 3 under the action of transient overvoltage.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A toroidal common mode inductor, characterized in that: It comprises a magnetic core (1), a base (2) and a coil (3); The magnetic core (1) is fixed on the base (2); A pin (4) is connected below the base (2); The coil (3) is wound on the magnetic core (1); The base (2) is provided with a connector (5) penetrating the board surface thereof, and the pin (4) is electrically connected to the lead wire (6) of the coil (3) via the connector (5); The connecting member (5) comprises a first connecting portion (51) and a second connecting portion (52); The first connecting portion (51) is adapted to the thickness of the lead wire (6); A first rubber ring (41) is sleeved on the top end of the pin (4); and the pin (4) sleeved with the first rubber ring (41) is adapted to the second connecting portion (52); The outlet diameter at the lower end of the second connecting portion (52) is smaller than the diameter of the first rubber ring (41).

2. The annular common mode inductor according to claim 1, characterized in that: A second rubber ring (521) is provided on the outlet at the lower end of the second connecting portion (52).

3. The annular common mode inductor according to claim 1, characterized in that: A limiting component for limiting the movement of the lead wire (6) is provided inside the pin (4).

4. The annular common mode inductor according to claim 3, characterized in that: The limiting assembly comprises elastic protrusions (7) arranged on both sides of the inner wall of the second connecting portion (52), and the distance between the two elastic protrusions (7) is smaller than the diameter of the lead wire (6).

5. The annular common mode inductor according to claim 1, characterized in that: The coil (3) comprises a first coil and a second coil, and the first coil and the second coil are symmetrically wound on two sides of the magnetic core (1).

6. The annular common mode inductor according to claim 5, characterized in that: Also includes a spacer (8); The spacer (8) comprises a first spacer and a second spacer; The first spacer ring and the second spacer ring are respectively arranged at the interval between the first coil and the second coil.

7. The annular common mode inductor according to claim 6, characterized in that: The base (2) is provided with a groove (21) that matches the cross-sectional size of the spacer (8).

8. The annular common mode inductor according to claim 1, characterized in that: The base (2) is provided with a pedestal (9), and the pedestal (9) is provided with a groove matching the magnetic core (1).

9. The annular common mode inductor according to claim 1, characterized in that: The surface of the magnetic core (1) is provided with an insulating coating.

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