Surface-mounted integrated punch-formed hollow inductor

Abstract

The utility model discloses a paster type integrated punch forming hollow inductor which at least comprises a rewinding coil group, the rewinding coil group comprises a first conductor, a second conductor and a connecting body, the first conductor and the second conductor are both bent strip-shaped bodies in structure, the first conductor and the second conductor are arranged in parallel at intervals, and the connecting body is connected with the first conductor and the second conductor. And the head ends of the first conductor and the second conductor are bent towards any side direction to form patch ends. The tail ends of the first conductor and the second conductor are connected through a connecting body, the bottom surface of the head end of the first conductor and the bottom surface of the head end of the second conductor are flush with the bottom surface of the connecting body, and the first conductor, the second conductor and the connecting body are integrally formed by punching copper sheets. According to the scheme, integral stamping is adopted, so that the consistency of the size and the structure of a product is high, the stamping forming process is simple, machining is convenient, the automation degree and the production efficiency are high, cost reduction is facilitated, and the method is suitable for machining air-core inductors with high-precision sensing tolerance requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of inductance components, in particular to a patch type integrally stamping and forming air core inductor. Background Technique

[0002] An air core inductor is a coil wound without a magnetic core made of magnetic material inside, such as air or other non-magnetic substances. Due to the absence of a magnetic core, there is no magnetic coupling effect in the air core inductor. Therefore, its frequency response is uniform over a wide frequency band and is suitable for a wide range of applications. The inductance value of the air core inductor is very stable. Since they use non-magnetic conductive materials as the medium, the inductance is relatively low and there is no magnetic core loss. These characteristics make the air core inductor very useful in radio frequency applications that require low inductance and stable inductance values. Existing air core inductors are usually made by winding enameled wires, wound into a hollow spiral column (as shown in Figure 1 ), and the functional pins are usually vertically downward, which is convenient for connecting to the PCB board by plug-in. The surface flatness of the coil in the traditional winding method is poor, and it is more limited to plug-in packaging. Due to the poor flatness, when using patch packaging, a flat bottom plate needs to be added and the pins need to be bent. Since the enameled wire is usually a round wire, there is a bending R angle, and a relatively long distance needs to be bent. Using patch packaging will be more complicated and increase costs. For smaller inductance components, patch packaging has more advantages than plug-in packaging. Therefore, this solution aims to research and improve the existing air core inductor to achieve easy production and patch packaging. Content of the Utility Model

[0003] The purpose of the utility model is to disclose a patch type integrally stamping and forming air core inductor to realize an easy-to-produce patch type air core inductor.

[0004] The technical solution disclosed by the utility model, a patch type integrally stamping and forming air core inductor, at least includes a set of winding coil groups. The winding coil groups include a first conductor, a second conductor, and a connecting body. The structures of the first conductor and the second conductor are both bent strip-shaped bodies. The first conductor and the second conductor are arranged at intervals in parallel. The first ends of the first conductor and the second conductor are both bent in any one side direction to form patch ends. The ends of the first conductor and the second conductor are connected by a connecting body. The bottom surfaces of the ends of the first conductor and the second conductor are flush with the bottom surface of the connecting body. The first conductor, the second conductor, and the connecting body are integrally stamped and formed from a metal sheet.

[0005] Furthermore, the metal sheet is a copper sheet. The first conductor, the second conductor, and the connecting body are stamped from the copper sheet into a "C" shape. The upper horizontal side of the "C" shape is the first conductor, the middle vertical side is the connecting body, and the lower horizontal side is the second conductor. The connecting body is bent at 90° with the first conductor and the second conductor. Both the first conductor and the second conductor are bent in multiple segments.

[0006] Preferably, the first conductor and the second conductor are bent in a three-segment manner. After bending, the cross-sections of the first conductor and the second conductor are in a "冂" shape. The hooked part of the "冂" shape is the first conductor head bent foot formed by bending the head of the first conductor 90° inward and the second conductor head bent foot formed by bending the head of the second conductor 90° inward.

[0007] Preferably, the highest top surface positions of the first conductor and the second conductor are flush. A suction sheet for sucking and feeding the wound coil group is pasted on the highest top surfaces of the first conductor and the second conductor. The suction sheet is made of adhesive paper, or plastic sheet, or epoxy sheet.

[0008] Preferably, the bending direction of the connecting body with the first conductor and the second conductor by 90° is opposite to that of the first conductor head bent foot and the second conductor head bent foot. A support fixing sheet is arranged above the connecting body, the first conductor head bent foot, and the second conductor head bent foot. The support fixing sheet is made of plastic sheet or epoxy sheet. The plastic sheet or epoxy sheet is adhesively bonded to the connecting body, the first conductor head bent foot, and the second conductor head bent foot by dotting for fixing the first conductor and the second conductor, making them not easy to shake.

[0009] Preferably, the whole surface of the wound coil group is electroplated with an anti-oxidation layer, or the whole wound coil group is subjected to tin dipping treatment.

[0010] When the chip-type integral stamping air-core inductor of this solution includes multiple wound coil groups, the wound coil groups are arranged along the direction of the first conductor and the second conductor at intervals in parallel, and the multiple wound coil groups are arranged on the same axis, and the multiple wound coil groups are connected in series.

[0011] The chip-type integral stamping air-core inductor designed by this technical solution has the following beneficial effects compared with the traditional wound coil plug-in air-core inductor:

[0012] 1. The air-core inductor of this solution is integrally formed by stamping copper sheets. Compared with the existing air-core inductor formed by winding into a hollow spiral column shape, stamping forming is adopted, the processing is simpler, the automation degree and production efficiency are high, the dimensional and structural consistency of the product is high, and it is suitable for air-core inductor products with high-precision inductance tolerance requirements.

[0013] 2. The hollow inductor designed by this scheme adopts an integrally stamped copper sheet. The bent first end foot of the first conductor and the bent second end foot of the integrally formed first conductor and second conductor are used as patch ends. The connector connected to the ends of the first conductor and the second conductor and bent maintains the flatness of the bottom surface, meeting the flatness requirement of the inductor patch on the PCB board. The bottom surface of the connector serves as a supporting and fixed patch end, and the bent first end foot of the first conductor and the bent second conductor are used as functional pin ends of the patch on the PCB board to form three-point fixation, thereby achieving a stable connection of the hollow inductor patch.

[0014] 3. The traditional hollow inductor with winding method is usually formed by winding enameled wire, and its pad usually needs to be stripped of the enameled wire and soldered as the pad. However, the copper sheet integrally stamped and formed in this solution can be directly used as the pad for surface mount welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of a conventional plug-in hollow inductor structure with a winding method.

[0016] Figure 2 This is a structural schematic diagram of the first embodiment of the utility model.

[0017] Figure 3 This is a schematic structural diagram of a first conductor and a second conductor in accordance with the first embodiment of the present invention, in which the highest top surfaces are provided with adhesive paper sheets, or plastic sheets, or epoxy sheets.

[0018] Figure 4 This is a schematic structural diagram of a plastic sheet or epoxy sheet disposed above the connector and the first conductor head end bent leg and the second conductor head end bent leg of the first embodiment of the present utility model.

[0019] Figure 5 This is a structural schematic diagram of the second embodiment of the utility model.

[0020] Reference numerals: 1-first conductor; 2-second conductor; 101-bent leg at the first end of the first conductor; 201-bent leg at the first end of the second conductor; 3-connector; 4-absorbent sheet; 5-supporting fixed sheet DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that the directional terms such as left, right, up and down in the embodiments of the present application are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head end", and "end" are based on the orientation or position relationship shown in the drawings and are only for the convenience of describing the present application 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 application.

[0024] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] The present technical solution provides a chip-type integrated stamped hollow inductor, which includes at least one group of winding coil groups. The specific structural features of the winding coil groups are described in detail below. The following embodiments are only for illustrating the technical solution of the present application. The specific structures shown in the following embodiments and the drawings in the specification are not limited to the only shape structure of the technical solution of the present application.

[0027] Embodiment 1

[0028] Please refer to Figures 1 to 4 , which is a chip-type integrated stamped hollow inductor composed of a group of winding coils proposed in this scheme, and the winding coil group includes a first conductor 1, a second conductor 2, and a connector 3. The first conductor 1 and the second conductor 2 are both bent strips. The first conductor 1 and the second conductor 2 are arranged in parallel at intervals. The first ends of the first conductor 1 and the second conductor 2 are both bent in either direction to form a chip end. The ends of the first conductor 1 and the second conductor 2 are connected by the connector 3. The bottom surface of the end of the first conductor 1 and the bottom surface of the end of the second conductor 2 are flush with the bottom surface of the connector 3. The first conductor 1, the second conductor 2 and the connector 3 are integrally stamped from metal sheets.

[0029] Further, the metal sheet is a copper sheet. The first conductor 1, the second conductor 2, and the connecting body 3 are stamped into a "C" shape by the copper sheet. The upper horizontal side of the "C" shape is the first conductor 1, the middle vertical side is the connecting body 3, and the lower horizontal side is the second conductor 2. The connecting body is bent at 90° with the first conductor 1 and the second conductor 2, and both the first conductor 1 and the second conductor 2 are bent in a multi-segmented manner.

[0030] Preferably, the first conductor 1 and the second conductor 2 are bent in a three-segmented manner. After bending, the cross-sections of the first conductor 1 and the second conductor 2 are in an "L" shape. The hooked part of the "L" shape is the first conductor head bent foot 101 formed by bending the head of the first conductor 1 inward at 90°, and the second conductor head bent foot 201 formed by bending the head of the second conductor 2 inward at 90°.

[0031] Preferably, the highest top surface positions of the first conductor 1 and the second conductor 2 are flush. A suction sheet 4 for sucking and feeding the wound coil group is pasted on the highest top surfaces of the first conductor 1 and the second conductor 2. The suction sheet 4 is a sticker paper, or a plastic sheet, or an epoxy sheet. Since the wound coil group is an inductor with a small inductance of 1 - 100 NH, the widths of the first conductor 1 and the second conductor 2 are about 3 mm. For the suction nozzle / suction cup of vacuum adsorption, a too small adsorption surface is usually not applicable. Therefore, the suction sheet 4 is pasted on it, which facilitates the sucking, conveying, and feeding of vacuum adsorption, and also plays a role in stabilizing and fixing the first conductor 1 and the second conductor 2 when their thickness is relatively thin.

[0032] Preferably, the bending direction of the connecting body 3 at 90° with the first conductor 1 and the second conductor 2 is opposite to that of the first conductor head bent foot 101 and the second conductor head bent foot 201. A support fixing sheet 5 is arranged above the connecting body 3, the first conductor head bent foot 101, and the second conductor head bent foot 201. The support fixing sheet 5 is a plastic sheet or an epoxy sheet. The plastic sheet or the epoxy sheet is adhesively bonded to the connecting body, the first conductor head bent foot 101, and the second conductor head bent foot 201 by dotting for fixing the first conductor 1 and the second conductor 2, making them not easy to shake.

[0033] Preferably, the whole surface of the wound coil group is electroplated with an anti-oxidation layer, or the whole wound coil group is subjected to tin dipping treatment to make it easy to weld during patch welding and ensure the stability and firmness of welding.

[0034] Embodiment 2

[0035] Please refer to Figure 5 , for the chip-type integrated stamping air-core inductor composed of two wound coil groups proposed by this technical solution. The two wound coil groups are arranged in parallel at intervals along the first conductor 1 and the second conductor 2, and the two wound coil groups are arranged on the same axis, and the two wound coil groups are connected in series.

[0036] It should be noted that, refer to Figure 5 The chip-type integrated stamped hollow inductor proposed in the technical solution includes at least one group of winding coil groups, and the specific embodiments listed include two groups of winding coil groups. For more than two groups, the structural principle is the same as the series structure of the two groups of winding coil groups, wherein the spacing and width between the first conductor 1, the second conductor 2 ... the Nth conductor can be adjusted according to the values ​​obtained by the limited detection experiment, and the size of the inductance that needs to be adjusted can be adjusted.

[0037] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A chip-type integrated stamping hollow inductor, characterized in that: It includes at least one set of winding coil groups. The winding coil group includes a first conductor, a second conductor, and a connecting body. The structures of the first conductor and the second conductor are both bent strip-shaped bodies. The first conductor and the second conductor are arranged in parallel at intervals. The first ends of the first conductor and the second conductor are each bent in any one side direction to form a patch end. The ends of the first conductor and the second conductor are connected by a connecting body. The bottom surfaces of the first ends of the first conductor and the second conductor are flush with the bottom surface of the connecting body. The first conductor, the second conductor, and the connecting body are integrally formed by stamping a metal sheet.

2. The chip-type integrated stamped hollow inductor according to claim 1, characterized in that: The metal sheet is a copper sheet. The first conductor, the second conductor, and the connecting body are stamped from the copper sheet into a "C" shape. The upper horizontal side of the "C" shape is the first conductor, the middle vertical side is the connecting body, and the lower horizontal side is the second conductor. The connecting body is bent at 90° with the first conductor and the second conductor. Both the first conductor and the second conductor are bent in a multi-segment manner.

3. The chip-type integrated stamped hollow inductor according to claim 2, characterized in that: The first conductor and the second conductor are bent in a three-segment manner. The cross-sections of the bent first conductor and second conductor are in an "L" shape. The hooked part of the "L" shape is the first conductor head bent foot where the first end of the first conductor is bent 90° inward and the second conductor head bent foot where the first end of the second conductor is bent 90° inward.

4. The chip-type integrated stamped hollow inductor according to claim 3, characterized in that: The highest top surface positions of the first conductor and the second conductor are flush. A suction sheet for sucking the winding coil group for feeding is pasted on the highest top surfaces of the first conductor and the second conductor. The suction sheet is a sticker paper, or a plastic sheet, or an epoxy sheet.

5. The chip-type integrated stamped hollow inductor according to claim 4, characterized in that: The bending direction of the connecting body at 90° with the first conductor and the second conductor is opposite to that of the first conductor head bent foot and the second conductor head bent foot. A support fixing sheet is arranged above the connecting body, the first conductor head bent foot, and the second conductor head bent foot. The support fixing sheet is a plastic sheet or an epoxy sheet. The plastic sheet or the epoxy sheet is adhesively bonded to the connecting body, the first conductor head bent foot, and the second conductor head bent foot by dispensing glue to fix the first conductor and the second conductor and prevent them from shaking easily.

6. The chip-type integrated stamped hollow inductor according to claim 1, characterized in that: The whole surface of the winding coil group is electroplated with an anti-oxidation layer, or the whole winding coil group is subjected to tin dipping treatment.

7. The chip-type integrated stamped hollow inductor according to claim 1, characterized in that: When there are multiple sets of winding coil groups, the winding coil groups are arranged along the direction of the first conductor and the second conductor arranged in parallel at intervals, and the multiple sets of winding coil groups are arranged on the same axis, and the multiple sets of winding coil groups are connected in series.

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