Inductor component

Abstract

The invention relates to the technical field of electronic components, in particular to an inductance component which comprises a coil, the peripheral face of the coil is wrapped with an insulating layer, the coil comprises a winding part wound into a hollow cylinder and leading-out parts arranged at the two ends of the winding part, and the leading-out parts are provided with leading-out ends; a molded portion including molding a mixture of magnetic and / or non-magnetic materials around the coil; the external terminal comprises a connecting part connected with the leading-out end and a clamping part connected with the mold pressing part, at least one part of the clamping part is exposed so that the inductance component can be assembled to a circuit, the mold pressing part and the coil are subjected to mold pressing to form an integrally-formed inductor, and the external terminal is connected with the leading-out end through the connecting part. The clamping part and the connecting part are integrally formed, the connecting part is connected with the leading-out end, a part of the clamping part is exposed to be used for being assembled to a circuit, the device is convenient to enlarge the contact surface between the leading-out end and the external terminal, and poor connection between the coil and the external terminal can be avoided even if the leading-out end is thin.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic components, and in particular relates to an inductor component. Background Art

[0002] The one-piece molded inductor has a fully enclosed structure and good magnetic shielding effect. It can effectively reduce electromagnetic interference and avoid noise. It has low DC impedance and can ensure a smooth decrease in the current resistance inductance value. The application frequency can reach 5MHz. It has been widely used in automotive, medical, laptop equipment, aerospace and other fields.

[0003] The raw materials for preparing one-piece molded inductors are generally soft magnetic metal powders, such as carbonyl iron powder, iron silicon powder, iron silicon chromium powder, amorphous powder or a mixture of the above powders. However, one-piece molded inductors are generally produced by die-casting. During the production process, high-inductance inductors are prone to breakage and damage between the coil and the lead frame during the pressing process because of the large number of coil layers and thin wire diameter, resulting in a short circuit in the inductor.

[0004] Therefore, in order to connect the external terminal to the end of the lead-out portion of the coil, it is necessary to form an external terminal connected to the end of the lead-out portion of the coil after removing the insulating film. However, when removing the insulating film by laser or the like, there is a case where residues of the insulating film are generated, and the insulating film is removed to a greater extent than required, thereby generating grooves. In this case, the electrically discontinuous portion between the end of the lead-out portion and the metal magnetic powder on the surface of the molded body increases. In order to form an external terminal that connects the end of the lead-out portion to the metal magnetic powder on the surface of the molded body even if this discontinuous portion exists, it is necessary to thicken the plating layer to a greater extent than required, and therefore an inductor component is required to solve the above problem. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an inductor component to solve the problems in the existing market raised in the above background technology.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] Inductive components, including:

[0008] A coil, wherein the outer circumference of the coil is wrapped with an insulating layer, the coil comprises a winding portion wound into a hollow cylindrical shape, and lead portions provided at both ends of the winding portion, the lead portion being provided with lead ends;

[0009] a molded portion, comprising molding a mixture of magnetic and / or non-magnetic materials around the coil;

[0010] The external terminal includes a connection portion connected to the lead-out terminal and a clamping portion connected to the molded portion, wherein at least a portion of the clamping portion is exposed so as to assemble the inductor component to a circuit.

[0011] Through the above technical scheme, the molded part and the coil are molded into an integrally formed inductor, the external terminal is connected to the lead-out end through the connecting part, the clamping part and the connecting part are integrally formed, the connecting part is connected to the lead-out end, and a part of the clamping part is exposed for assembly to the circuit. This device facilitates increasing the contact surface between the lead-out end and the external terminal, and even if the lead end is thin, poor connection between the coil and the external terminal can be avoided.

[0012] As a preferred solution of the present invention, the connection between the lead-out end and the external terminal is arranged in the molded portion.

[0013] The above technical solution can prevent disconnection of the connection and further enhance the tightness of the connection.

[0014] As a preferred embodiment of the present invention, the connecting portion is in the shape of an inverted gantry, including a connecting block one, a connecting block two connected to one end of the connecting block one, and a connecting block three connected to the other end of the connecting block two.

[0015] Through the above technical solution, the connecting block 1 is connected to the connecting block 3 through the connecting block 2 and is formed as one piece.

[0016] As a preferred solution of the present invention, the connecting block 1 is in a barb shape.

[0017] As a preferred solution of the present invention, the lead-out portion passes through the barb portion of the first connecting block and is wrapped around the outer peripheral surface of the second connecting block.

[0018] Through the above technical solution, the lead-out part passes through the barb part of the connecting block one, which facilitates increasing the contact area with the connecting part. Even if the barb part is deformed during pressure molding, it will be tightly connected, which is beneficial to reduce breakage and avoid the molding part separating and breaking the lead-out part from the connecting block one during pressing.

[0019] As a preferred solution of the present invention, the lead terminal is connected to three sides of the connection block in a curled shape.

[0020] Through the above technical solution, the contact area between the lead terminal and the connecting block three is further increased.

[0021] As a preferred solution of the present invention, at least a part of the clamping portion is exposed outside the molded portion, and the clamping portion is in contact with the molded portion.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The molded part and the coil are molded into an integrally formed inductor, the external terminal is connected to the lead-out end through the connecting part, the clamping part and the connecting part are integrally formed, the connecting part is connected to the lead-out end, and a part of the clamping part is exposed for assembly to the circuit. This device is convenient for increasing the contact surface between the lead-out end and the external terminal, and even if the lead end is thin, poor connection between the coil and the external terminal can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the inductor component of the present invention;

[0026] Figure 2 For the present invention Figure 1 Schematic diagram of the local structure in;

[0027] Figure 3 For the present invention Figure 1 Schematic diagram of the coil structure. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] The present invention provides the following embodiments:

[0030] Inductive components, including:

[0031] The coil 1 has an insulating layer wrapped around its outer circumference. The coil 1 is a metal conductor. The preferred material of the coil 1 is copper. The coil 1 includes a winding portion 11 wound in a hollow cylindrical shape, and lead portions 12 provided at both ends of the winding portion 11. The lead portion 12 is provided with lead ends 13.

[0032] A molding part 2, comprising molding a mixture of magnetic and / or non-magnetic materials around the coil 1;

[0033] The external terminal 3 includes a connection portion 31 connected to the lead-out terminal 13 and a clamping portion 32 connected to the molded portion 2. At least a portion of the clamping portion 32 is exposed so as to assemble the inductor component to a circuit.

[0034] As a further improvement of the present invention, the connection between the lead-out end 13 and the external terminal 3 is arranged inside the molded portion 2, so as to avoid disconnection of the connection and further enhance the tightness of the connection.

[0035] As a further improvement of the present invention, the connecting portion 31 is in an inverted gantry shape, including a connecting block 1 311, a connecting block 2 312 connected to one end of the connecting block 1 311, and a connecting block 3 313 connected to the other end of the connecting block 2 312. The connecting block 1 311 is connected to the connecting block 3 313 through the connecting block 2 312 and is formed as an integral unit.

[0036] As a further improvement of the present invention, the connecting block 1 311 is in the shape of a barb; the lead-out portion 12 passes through the barb of the connecting block 1 311 and is wrapped around the outer peripheral surface of the connecting block 2 312. The lead-out portion 12 passes through the barb of the connecting block 1 311 to increase the contact surface with the connecting portion 31. Even if the barb is deformed during pressure molding, it will be tightly connected, which is beneficial to reduce breakage and prevent the molded portion 2 from separating and breaking the lead-out portion 12 from the connecting block 1 311 during pressing.

[0037] As a further improvement of the present invention, the lead terminal 13 is connected to the side of the connection block 313 in a curled shape, further increasing the contact area between the lead terminal and the connection block 313.

[0038] As a further improvement of the present invention, at least a portion of the clamping portion 32 is exposed outside the molded portion 2 , and the clamping portion 32 fits the molded portion 2 .

[0039] The molded portion 2 and the coil 1 are molded into an integrally formed inductor, the external terminal 3 is connected to the lead-out terminal 13 via the connecting portion 31, the clamping portion 32 is integrally formed with the connecting portion 31, the connecting portion 31 is connected to the lead-out terminal 13, a portion of the clamping portion 32 is exposed for assembly to the circuit, and the device facilitates increasing the contact surface between the lead-out terminal 13 and the external terminal 3, and can avoid poor connection between the coil 1 and the external terminal 3 even if the lead end is thin.

[0040] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Inductor component, characterized in that ,include: A coil (1), wherein the outer circumference of the coil (1) is wrapped with an insulating layer, the coil (1) comprises a winding portion (11) wound into a hollow cylindrical shape, and lead portions (12) provided at both ends of the winding portion (11), the lead portion (12) being provided with lead ends (13); A molding part (2), comprising molding a mixture of magnetic and / or non-magnetic materials around the coil (1); The external terminal (3) comprises a connecting portion (31) connected to the lead end (13) and a clamping portion (32) connected to the molded portion (2), wherein at least a portion of the clamping portion (32) is exposed so as to assemble the inductor component to a circuit.

2. The inductor component according to claim 1, characterized in that: The connection point between the lead-out end (13) and the external terminal (3) is arranged inside the molded portion (2).

3. The inductor component according to claim 2, characterized in that: The connecting portion (31) is in the shape of an inverted gantry, comprising a connecting block 1 (311), a connecting block 2 (312) connected to one end of the connecting block 1 (311), and a connecting block 3 (313) connected to the other end of the connecting block 2 (312).

4. The inductor component according to claim 3, characterized in that: The connecting block 1 (311) is in the shape of a barb.

5. The inductor component according to claim 4, characterized in that: The lead-out portion (12) passes through the barb portion of the first connecting block (311) and is wound around the outer peripheral surface of the second connecting block (312).

6. The inductor component according to claim 5, characterized in that: The lead-out terminal (13) is connected to three sides (313) of the connection block in a curled shape.

7. The inductor component according to claim 6, characterized in that: At least a portion of the clamping portion (32) is exposed outside the molded portion (2), and the clamping portion (32) is in close contact with the molded portion (2).

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