Inductance coil module and integrally formed inductor

Abstract

The utility model relates to an inductance coil module and an integrally-formed inductor, and belongs to the technical field of inductors, the inductance coil module comprises a plurality of coils and a frame, the frame comprises two connecting parts and a plurality of electrode parts, the plurality of electrode parts are arranged on the two connecting parts in a pairwise opposite mode, and the electrode parts are arranged on the two connecting parts. The electrode part comprises a wide edge part, a narrow edge part and a connecting arm, the wide edge part is connected with the connecting part, the width of the narrow edge part is smaller than that of the wide edge part, the narrow edge part is connected to the wide edge part, the connecting arm is connected to the narrow edge part, and the two ends of the coil are connected with the connecting arm. The contact area of the integrally-formed inductor and a PCB bonding pad is increased by increasing the width of the bottom of the electrode plate, and the strength and the shock strength of a folding pin are guaranteed by increasing the thickness of the electrode plate in a matched mode. A narrow edge part is arranged at the bent part of the electrode plate to reduce the width of the electrode plate, so that the side crack of the bent part after stress caused by too large width is prevented; open circuit caused by looseness and displacement after the contact point of the inductor and the PCB bonding pad is stressed is prevented, and stable work of the inductor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to an inductor coil module and an integrally molded inductor. Background Technology

[0002] An inductor coil is an inductor that can be used at high frequencies. It has a simple structure, excellent performance, and a wide range of wire specifications. It is especially suitable for inductor molding technology. Molded inductors are formed by die casting iron powder with round copper wire coils in one piece using a special process. They have the characteristics of high current resistance and low impedance. Molded inductors are widely used in various high current electronic circuits. Before molding, multiple inductor coils need to be spot-welded to a frame, then magnetic powder is die-cast to form a magnetic core, and finally, it is formed by cutting, bending and other operations.

[0003] Existing inductors, due to different application environments, such as those with high product height or strong vibration, have small contact surfaces between the product's electrode plates and PCB board pads. This can cause the contact points to loosen and shift under stress, resulting in open circuits. Therefore, there is an urgent need to design an inductor module and an integrated inductor to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an inductor coil module and an integrally molded inductor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An inductor module includes several coils and a frame. The frame includes two connecting parts and several electrode parts. The electrode parts are arranged opposite each other on the two connecting parts. Each electrode part includes a wide side, a narrow side, and a connecting arm. The wide side is connected to the connecting part. The narrow side is narrower than the wide side and is connected to the wide side. The connecting arm is connected to the narrow side. Both ends of the coil are connected to the connecting arm.

[0007] Preferably, the connecting arm includes a first connecting arm and a second connecting arm, the first connecting arm and the second connecting arm are forked and connected on the narrow side, the first connecting arm is larger than the second connecting arm, and the two ends of the coil are respectively connected to the two first connecting arms.

[0008] Preferably, the two ends of the coil are connected to the first connecting arm by riveting or soldering.

[0009] Preferably, the electrode portion further includes a first bending portion and a second bending portion. The first bending portion is located at the connection between the connecting arm and the narrow side portion, and the connecting arm is bent perpendicularly to the narrow side portion through the first bending portion. The second bending portion is located at the connection between the narrow side portion and the wide side portion, and the narrow side portion is bent perpendicularly to the wide side portion through the second bending portion. The connecting arm and the wide side portion are located on the same side of the narrow side portion.

[0010] Preferably, the frame further includes a plurality of connecting rods spaced apart, and the two connecting parts are connected by the plurality of connecting rods.

[0011] Preferably, the connecting part is provided with at least one positioning hole, which is used for positioning and installation between the frame and the molding die of the magnetic core.

[0012] Preferably, the two oppositely arranged electrode portions are used to form two electrode sheets by cutting and separating them from the two connecting portions after the magnetic core is formed. The two electrode sheets are used to be bent and attached to the magnetic core from both ends of the magnetic core through the first bending portion and the second bending portion, respectively. The connecting arm is connected to the coil and located inside the magnetic core. The narrow side portion is attached to the two side walls of the magnetic core, and the wide side portion is attached to the same side of the magnetic core.

[0013] This utility model also provides an integrally molded inductor, which is processed using the inductor coil module described above; the integrally molded inductor includes the coil, the magnetic core and two electrode plates, the magnetic core is formed on the coil by powder pressing, the two electrode plates are formed at both ends of the coil by cutting on the frame, and the electrode plates are connected to both ends of the coil by two first connecting arms and bent and attached to the magnetic core.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention increases the contact area between the integrally molded inductor and the PCB board pads by increasing the width of the bottom of the electrode sheet, and also increases the thickness of the electrode sheet to ensure the strength and shock resistance at the bend. Furthermore, a narrow edge is provided at the bend of the electrode sheet to reduce the width of the electrode sheet and prevent it from cracking under stress due to excessive width. This invention prevents the contact point between the inductor and the PCB board pads from loosening and shifting under stress, thus ensuring the stable operation of the inductor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the inductor coil module of this utility model;

[0017] Figure 2 This is a schematic diagram of the folded structure of the inductor coil of this utility model;

[0018] Figure 3 This is a perspective view of the integrally molded inductor of this utility model.

[0019] Figure Labels

[0020] 1. Coil, 2. Frame, 201. First connecting arm, 202. First bending part, 203. Electrode part, 204. Second bending part, 205. Connecting part, 206. Positioning hole, 207. Connecting rod, 208. Second connecting arm, 209. Narrow side part, 210. Wide side part, 3. Electrode sheet, 4. Magnetic core. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Implementation Method 1

[0023] like Figure 1-2 As shown, an inductor coil module includes several coils 1 and a frame 2. The frame 2 includes two connecting parts 205 and several electrode parts 203. The electrode parts 203 are arranged opposite to each other on the two connecting parts 205. The frame 2 also includes several connecting rods 207 arranged at intervals. The two connecting parts 205 are connected by the several connecting rods 207. The connecting part 205 is provided with at least one positioning hole 206. The positioning hole 206 is used for positioning and installation between the frame 2 and the forming mold of the magnetic core.

[0024] The electrode portion 203 includes a wide side portion 210, a narrow side portion 209, and a connecting arm. The wide side portion 210 is connected to the connecting portion 205. The width of the narrow side portion 209 is smaller than that of the wide side portion 210 and is connected to the wide side portion 210. The connecting arm includes a first connecting arm 201 and a second connecting arm 208. The first connecting arm 201 and the second connecting arm 208 are forked and connected to the narrow side portion 209. The size of the first connecting arm 201 is larger than that of the second connecting arm 208. The two ends of the coil 1 are connected to the first connecting arm 201 by riveting or soldering.

[0025] The electrode portion 203 also includes a first bending portion 202 and a second bending portion 204. The first bending portion 202 is located at the connection between the connecting arm and the narrow side portion 209, and the connecting arm is bent perpendicularly to the narrow side portion 209 through the first bending portion 202. The second bending portion 204 is located at the connection between the narrow side portion 209 and the wide side portion 210, and the narrow side portion 209 is bent perpendicularly to the wide side portion 210 through the second bending portion 204. The connecting arm and the wide side portion 210 are located on the same side of the narrow side portion 209.

[0026] Two opposing electrode portions 203 are used to separate from the two connecting portions 205 after the magnetic core 4 is formed to form two electrode pieces 3. The two electrode pieces 3 are used to be bent and attached to the magnetic core 4 from both ends of the magnetic core 4 through the first bending portion 202 and the second bending portion 204, respectively. The connecting arm is connected to the coil 1 and located inside the magnetic core 4. The narrow side portion 209 is attached to the two side walls of the magnetic core 4. The wide side portion 210 is attached to the same side of the magnetic core 4 as a pin for the inductor to contact the PCB board pad.

[0027] Implementation Method 2

[0028] like Figure 3 As shown, this utility model also provides an integrally molded inductor, which is processed by an inductor coil module; the integrally molded inductor includes a coil 1, a magnetic core 4 and two electrode plates 3. The magnetic core 4 is formed on the coil 1 by powder pressing. The two electrode plates 3 are formed at both ends of the coil 1 by cutting on the frame 2. The electrode plates 3 are connected to both ends of the coil 1 by two first connecting arms 201, and are bent and attached to the magnetic core 4 by a first bending part 202 and a second bending part 204.

[0029] The fabrication of this integrally molded inductor includes the following steps: Figure 1 As shown, coil 1 assembly: at least one coil 1 is placed on two first connecting arms 201 of frame 2 and connected by riveting or soldering; magnetic core 4 forming: powder is die-cast onto at least one coil 1 to form at least one magnetic core 4; frame 2 cutting: frame 2 is cut to form multiple electrode pieces 3 connected to multiple coils 1; as shown Figure 3 As shown, the electrode pieces are bent and formed; multiple electrode pieces 3 are bent and attached to the magnetic core 4 from both ends of the magnetic core 4 through the first bending part 202 and the second bending part 204, respectively. The connecting arm is connected to the coil 1 and located inside the magnetic core 4. The narrow side part 209 is attached to the two side walls of the magnetic core 4; the wide side part 210 is attached to the same side of the magnetic core 4 as a pin for the inductor to contact the PCB board pad. When appropriate, glue can be applied to the magnetic core 4 before bending the electrode pieces 3 to increase the shock resistance of the pin, thereby forming at least one integrally formed inductor.

[0030] This invention increases the contact area between the integrally molded inductor and the PCB board pads by increasing the width of the bottom of the electrode sheet, and also increases the thickness of the electrode sheet to ensure the strength and shock resistance at the bend. Furthermore, a narrow edge is provided at the bend of the electrode sheet to reduce the width of the electrode sheet and prevent it from cracking under stress due to excessive width. This invention prevents the contact point between the inductor and the PCB board pads from loosening and shifting under stress, thus ensuring the stable operation of the inductor.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An inductor coil module, characterized in that: It includes several coils and a frame. The frame includes two connecting parts and several electrode parts. The electrode parts are arranged opposite each other on the two connecting parts. Each electrode part includes a wide side, a narrow side, and a connecting arm. The wide side is connected to the connecting part. The narrow side is narrower than the wide side and is connected to the wide side. The connecting arm is connected to the narrow side. The two ends of the coil are connected to the connecting arm. The connecting arm includes a first connecting arm and a second connecting arm, which are forked and connected on the narrow side. The first connecting arm is larger than the second connecting arm, and the two ends of the coil are respectively connected to the two first connecting arms. The electrode portion further includes a first bending portion and a second bending portion. The first bending portion is located at the connection between the connecting arm and the narrow side portion, and the connecting arm is bent perpendicularly to the narrow side portion through the first bending portion. The second bending portion is located at the connection between the narrow side portion and the wide side portion, and the narrow side portion is bent perpendicularly to the wide side portion through the second bending portion. The connecting arm and the wide side portion are located on the same side of the narrow side portion. The two oppositely arranged electrode portions are used to form two electrode sheets by cutting and separating them from the two connecting portions after the magnetic core is formed. The two electrode sheets are used to be bent and attached to the magnetic core from both ends of the magnetic core through the first bending portion and the second bending portion, respectively. The connecting arm is connected to the coil and located inside the magnetic core. The narrow side portion is attached to the two side walls of the magnetic core, and the wide side portion is attached to the same side of the magnetic core.

2. An inductor coil module according to claim 1, characterized in that: The two ends of the coil are connected to the first connecting arm by riveting or soldering.

3. An inductor coil module according to claim 1, characterized in that: The frame also includes a number of connecting rods spaced apart, and two of the connecting parts are connected by the number of connecting rods.

4. An inductor coil module according to claim 3, characterized in that: The connecting part is provided with at least one positioning hole, which is used for positioning and installation between the frame and the forming mold of the magnetic core.

5. A molded inductor, characterized in that: The inductor is manufactured using the inductor coil module as described in any one of claims 1-4; the integrally molded inductor includes the coil, the magnetic core and two electrode plates, the magnetic core is formed on the coil by powder pressing, the two electrode plates are formed at both ends of the coil by cutting on the frame, and the electrode plates are connected to both ends of the coil by two first connecting arms and bent and attached to the magnetic core.

Images