Common mode choke inductor and manufacturing method thereof

Abstract

The present invention discloses a common-mode choke inductor, comprising a magnetic core and a coil, wherein two magnetic cores and two coils are provided, and the two coils are respectively wound on the two magnetic cores, and both ends of the magnetic core are provided with a terminal, and the two magnetic cores are respectively plugged into the inner two sides of the terminal, and the terminal is clamped with a hardware terminal, and the horizontal sides of the hardware terminal are integrally formed with two side fixing blocks for limiting the magnetic core, and the bottom of the two terminals is fixedly connected. In the present invention, the magnetic core and the hardware terminal are assembled, and then the wire is wound, and the two ends of the coil are respectively welded to the upper end electrode of the hardware terminal, and the lower end electrode of the hardware terminal is used as the product electrode. After the flat structure is bonded, a single product is obtained, thereby realizing batch production, improving production efficiency, reducing production costs, and enhancing the product's anti-drop and anti-vibration performance. At the same time, the flat structure effectively protects the electrode and copper wire, and avoids the occurrence of human damage to the copper wire.

Description

Technical Field

[0001] The present invention relates to the technical field of inductor coils, and in particular to a common-mode choke inductor coil and a manufacturing method thereof. Background Art

[0002] Common-mode inductors, also known as common-mode chokes, are commonly used in computer switching power supplies to filter common-mode electromagnetic interference signals. In board design, common-mode inductors also act as EMI filters, suppressing the outward radiation of electromagnetic waves generated by high-speed signal lines.

[0003] Existing inductor coils commonly use metallized magnetic cores as electrodes, which has low mechanical reliability. Alternatively, they are molded through injection molding, which has good mechanical reliability but is more complex, costly, and prone to magnetic cracks. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of low mechanical properties of metallized magnetic cores, high cost of injection-molded packaged magnetic cores, and easy occurrence of magnetic cracks, and to propose a common mode choke inductor coil and a manufacturing method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A common-mode choke inductor comprises a magnetic core and a coil, wherein two magnetic cores and two coils are provided, and the two coils are respectively wound on the two magnetic cores. Both ends of the magnetic core are provided with end heads, and the two magnetic cores are respectively plugged into the inner sides of the end heads. The end heads are clamped with hardware terminals, and the horizontal sides of the hardware terminals are integrally formed with two side fixing blocks for limiting the magnetic core, and a bottom plate is fixedly connected to the bottom of the two end heads.

[0007] As a further description of the above technical solution:

[0008] Two mounting grooves are symmetrically arranged at the horizontal midline position of the end head, and the two mounting grooves are respectively arranged corresponding to the two magnetic cores.

[0009] As a further description of the above technical solution:

[0010] The side fixing block is slidably embedded in the installation groove, and the opposite side of the side fixing block is in an arc-shaped structure, and the arc-shaped surface of the side fixing block is fitted with the outer wall of the magnetic core.

[0011] As a further description of the above technical solution:

[0012] The longitudinal section of the hardware terminal is a C-shaped structure, with the top and bottom ends inclined inward by 5-15 degrees, and two plug-ins are fixedly connected symmetrically at the center of the hardware terminal. Two slots are provided on the end, and the two slots are slidably fitted with the plug-ins.

[0013] As a further description of the above technical solution:

[0014] The upper end of the hardware terminal is provided with a wiring slot, and the wiring slot is welded to the two coils respectively.

[0015] As a further description of the above technical solution:

[0016] A method for manufacturing a common mode choke inductor coil comprises the following steps:

[0017] Step 1: Wind the coils on the two magnetic cores respectively, and the winding directions of the coils on the two magnetic cores are opposite;

[0018] Step 2: Insert the two magnetic cores into the mounting slots of the two ends respectively;

[0019] Step 3: Align the inserts of the two hardware terminals with the slots and assemble them. After the insertion is completed, slide the side fixing blocks on both sides of the center line of the hardware terminals to the outside of the two magnetic cores and fit them to limit the magnetic cores;

[0020] Step 4: Solder the free ends of the two coils to the two wiring slots on the hardware terminals respectively;

[0021] Step 5: Weld the upper end of the hardware terminal to the bottom plate to complete the manufacturing.

[0022] As a further description of the above technical solution:

[0023] The hardware terminal and the end are bonded together using glue.

[0024] As a further description of the above technical solution:

[0025] The hardware terminal has a three-section structure, the portion connected to the two side fixing blocks is made of copper material, and the portion located between the two sections is made of insulating material.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] In the present invention, the magnetic core and the hardware terminal are assembled, and then the wire is wound. The two ends of the coil are respectively welded to the upper electrode of the hardware terminal, and the lower electrode of the hardware terminal is used as the product electrode. After bonding the flat structure, a single product is obtained, which realizes batch production, improves production efficiency, reduces production costs, and enhances the product's anti-drop and anti-vibration performance. At the same time, the flat structure effectively protects the electrode and the copper wire, avoiding the occurrence of human damage to the copper wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A top view of an embodiment of a common mode choke inductor and a manufacturing method thereof according to the present invention;

[0029] Figure 2 A partial front view of an embodiment of a common mode choke inductor and a method for manufacturing the same according to the present invention;

[0030] Figure 3 A longitudinal sectional side view of an embodiment of a common mode choke inductor and a manufacturing method thereof according to the present invention;

[0031] Figure 4 A side view of a hardware terminal provided in an embodiment of a common-mode choke inductor and a manufacturing method thereof according to the present invention.

[0032] Legend:

[0033] 1. Terminal; 101. Mounting slot; 2. Hardware terminal; 201. Wiring slot; 3. Bottom plate; 4. Magnetic core; 5. Coil; 6. Side fixing block; 7. Insert; 8. Slot. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] For example 1, please refer to Figure 1-4A common mode choke inductor includes a magnetic core 4 and a coil 5. Two magnetic cores 4 and two coils 5 are provided, and the two coils 5 are respectively wound on the two magnetic cores 4. The winding directions of the two magnetic cores 4 are opposite. Ends 1 are provided at both ends of the magnetic core 4, and the two magnetic cores 4 are respectively plugged into the inner sides of the end 1. Two mounting grooves 101 are symmetrically provided at the horizontal midline position of the end 1. The two mounting grooves 101 are U-shaped structures, and the two mounting grooves 101 are respectively provided corresponding to the two magnetic cores 4. A hardware terminal 2 is clamped on the end 1, and two side fixing blocks 6 for limiting the magnetic core 4 are integrally formed on the horizontal sides of the hardware terminal 2. The side fixing blocks 6 are slidably embedded in the interior of the mounting groove 101, and the relative positions of the side fixing blocks 6 One side has an arc-shaped structure, and the arc-shaped surface of the side fixing block 6 is fitted with the outer wall of the magnetic core 4. The longitudinal section of the hardware terminal 2 is a C-shaped structure, and its top and bottom ends are inclined inward by 5-15°. The top and bottom ends of the hardware terminal 2 are elastic toward the inside, so that the terminal 1 has a certain clamping force, and two plug-in pieces 7 are fixedly connected symmetrically at the center of the hardware terminal 2. Two slots 8 are provided on the terminal 1, and the two slots 8 are slidably fitted with the plug-in piece 7. The plug-in piece 7 and the slot 8 are both vertically arranged, and the plug-in piece 7 and the slot 8 are gap-fitted. A wiring slot 201 is provided at the upper end of the hardware terminal 2, and the wiring slot 201 is respectively welded to the two coils 5. The bottom of the two terminals 1 is fixedly connected to the bottom plate 3;

[0036] A method for manufacturing a common mode choke inductor coil comprises the following steps:

[0037] Step 1: Wind the coils 5 on the two magnetic cores 4 respectively, and the winding directions of the coils 5 on the two magnetic cores 4 are opposite;

[0038] Step 2: Insert the two magnetic cores 4 into the mounting slots 101 of the two terminals 1 respectively;

[0039] Step 3: Align the inserts 7 of the two hardware terminals 2 with the slots 8 and assemble them. Use glue to stick the hardware terminals 2 and the end 1 together. After the hardware terminals 2 are connected, the side fixing blocks 6 on both sides of the center line of the hardware terminals 2 slide to the outside of the two magnetic cores 4 and fit them to limit the magnetic cores 4.

[0040] Step 4: Solder the free ends of the two coils 5 to the two wiring slots 201 on the hardware terminal 2. The hardware terminal 2 has a three-section structure. The part connected to the two side fixing blocks 6 is made of copper material, and the part located between the two sections is made of insulating material.

[0041] Step 5: Weld the upper end of the hardware terminal 2 to the bottom plate 3 to complete the manufacturing.

[0042] Working principle: Wind the coils 5 on the two magnetic cores 4 respectively, and the winding directions of the coils 5 on the two magnetic cores 4 are opposite; insert the two magnetic cores 4 into the installation slots 101 of the two end heads 1 respectively; align the inserts 7 of the two hardware terminals 2 with the slots 8 for assembly, and glue the hardware terminals 2 and the end heads 1 together. After the insertion is completed, the side fixing blocks 6 on both sides of the midline position of the hardware terminal 2 slide to the outside of the two magnetic cores 4 and fit with them to limit the magnetic cores 4; weld the free ends of the two coils 5 to the two wiring slots 201 on the hardware terminal 2 respectively. The hardware terminal 2 has a three-section structure. The part connected to the two side fixing blocks 6 is made of copper material, and the part located in the middle of the two sections is made of insulating material; weld the upper end of the hardware terminal 2 to the bottom plate 3 to complete the manufacturing.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A common mode choke inductor, comprising a magnetic core (4) and a coil (5), wherein two magnetic cores (4) and two coils (5) are provided, and the two coils (5) are respectively wound on the two magnetic cores (4), characterized in that: Both ends of the magnetic core (4) are provided with end caps (1), two mounting grooves (101) are symmetrically provided at the center of the horizontal midline of the end cap (1), and the two mounting grooves (101) are respectively provided corresponding to the two magnetic cores (4), and the ends of the magnetic core (4) are inserted into the mounting grooves (101), a hardware terminal (2) is clamped on the end cap (1), and two side fixing blocks (6) for limiting the magnetic core (4) are integrally formed on both sides of the vertical section of the hardware terminal (2), and a bottom plate (3) is fixedly connected below the two end caps (1); The longitudinal section of the hardware terminal (2) is a C-shaped structure, with the top and bottom ends thereof both tilted inward by 5-15 degrees.

2. The common mode choke inductor according to claim 1, characterized in that: The side fixing block (6) is slidably embedded in the interior of the installation groove (101), and the opposite side of the side fixing block (6) is in an arc-shaped structure, and the arc-shaped surface of the side fixing block (6) is fitted with the outer wall of the magnetic core (4).

3. The common mode choke inductor according to claim 1, characterized in that: Two inserts (7) are symmetrically fixedly connected at the center of the hardware terminal (2), and two slots (8) are provided on the end head (1), and the two slots (8) are slidably fitted with the inserts (7).

4. The common mode choke inductor according to claim 3, characterized in that: A wiring slot (201) is provided at the upper end of the hardware terminal (2), and the wiring slot (201) is welded to the two coils (5) respectively.

5. A method for manufacturing a common mode choke inductor, applied to the common mode choke inductor according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: Winding the coils (5) on the two magnetic cores (4) respectively, with the coils (5) on the two magnetic cores (4) being wound in opposite directions; Step 2: Insert the two magnetic cores (4) into the mounting slots (101) of the two end heads (1) respectively; Step 3: Align the inserts (7) of the two hardware terminals (2) with the slots (8) for assembly. After the hardware terminals (2) are assembled, the side fixing blocks (6) on both sides of the center line position are slid to the outside of the two magnetic cores (4) and fit with them to limit the magnetic cores (4); Step 4: Weld the free ends of the two coils (5) to the two wiring slots (201) on the hardware terminal (2); Step 5: Weld the lower end of the hardware terminal (2) to the bottom plate (3) to complete the manufacturing.

6. The method for manufacturing a common mode choke inductor according to claim 5, wherein: The hardware terminal (2) and the end head (1) are bonded together using glue.

7. The method for manufacturing a common mode choke inductor according to claim 5, wherein: The hardware terminal (2) has a three-section structure, the portion connected to the two side fixing blocks (6) is made of copper material, and the portion located between the two sections is made of insulating material.

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