Plug-in type integrated punch-formed hollow inductor

Abstract

The utility model discloses a plug-in type integrated punch forming hollow inductor which at least comprises a rewinding coil group, each rewinding coil group comprises a strip-shaped and multi-section bent first conductor and a strip-shaped and multi-section bent second conductor, the first conductor and the second conductor are arranged side by side at intervals, the rear ends of the first conductor and the second conductor are provided with connecting parts, and the connecting parts are connected with the rewinding coil group. The front ends of the first conductor and the second conductor are respectively provided with a first pin and a second pin which are vertically downward; and the first conductor, the second conductor, the connecting part, the first pin and the second pin are integrally punched and formed through metal sheets. According to the scheme, the metal sheet is integrally punched and formed, machining is simpler, the automation degree and the production efficiency are high, the consistency of the size and the structure of products is high, and the air core inductor is suitable for air core inductor products with high-precision sensing tolerance requirements. The problems that according to an existing wound hollow spiral columnar hollow inductor, a hollow coil is loosened and rebounds or deforms, the size changes, and the inductance precision is different are solved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a plug-in type integral stamped hollow inductor. Background Technology

[0002] An air-core inductor is a wound coil without a magnetic core made of any magnetic material, such as air or other non-magnetic substances. Because it lacks a magnetic core, an air-core inductor experiences no magnetic coupling effect, resulting in a uniform frequency response over a wide bandwidth, making it suitable for broad-spectrum applications. Air-core inductors have very stable inductance values ​​because they use non-magnetic materials as the dielectric, resulting in relatively low inductance and no core losses. These characteristics make air-core inductors extremely useful in radio frequency applications requiring low and stable inductance values. Existing air-core inductors are typically made by winding enameled wire into a hollow helical cylindrical shape (e.g., ...). Figure 1 As shown, the pins naturally extend out. Although the pin positions are guaranteed by tooling, ensuring the initial parameters are maintained, stress remains unreleased within the coil. During subsequent storage or transportation, stress release can cause the hollow coil to loosen, spring back, or deform, leading to dimensional changes and consequently, significant deviations in the inductance parameters. The inductance accuracy cannot be accurately controlled. Furthermore, existing methods using hollow spiral cylinder winding result in poor coil surface flatness and inconsistent dimensions and structure. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a plug-in type integral stamping hollow inductor, which solves the problems of large inductance accuracy deviation, poor flatness, and poor dimensional and structural consistency of existing hollow inductors made of enameled wire and hollow spiral column.

[0004] The technical solution disclosed in this utility model is a plug-in type integral stamping hollow inductor, which includes at least one set of rewinding coil groups. Each set of rewinding coil groups includes a strip-shaped first conductor and a second conductor with multiple bends. The first conductor and the second conductor are arranged side by side at intervals. The rear ends of the first conductor and the second conductor are provided with a connecting part. The front ends of the first conductor and the second conductor are respectively provided with a vertically downward first pin and a second pin. The first conductor, the second conductor, the connecting part, the first pin, and the second pin are integrally stamped by a metal sheet.

[0005] Preferably, both the first conductor and the second conductor are in the form of " ㄇ The device has a three-section bend, with the width of the first pin being less than the width of the first conductor, and the width of the second pin being less than the width of the second conductor. When the first and second pins are plugged into the circuit board, the bottom front ends of the first and second conductors abut against the circuit board, thus limiting the insertion of the first and second pins.

[0006] Furthermore, the bottom of the connecting part is on the same water surface as the bottom of the first conductor and the second conductor. The bottom of the connecting part is provided with a support pin. The support pin, the first conductor, the second conductor, the connecting part, the first pin, and the second pin are integrally stamped together by a metal sheet.

[0007] Furthermore, the supporting pin is vertically downward, and the supporting pin is the third pin located at the bottom center of the connection part, or the fourth and fifth pins located on both sides of the bottom of the connection part. The third pin, or the fourth and fifth pins, serve as a limit and support when the hollow inductor is installed in a plug-in manner on the circuit board.

[0008] Furthermore, the metal sheet mentioned is made of copper.

[0009] Furthermore, the entire surface of the rewinding coil assembly is electroplated with an anti-oxidation layer, or the entire rewinding coil assembly is subjected to tin-immersion treatment.

[0010] Further, the first conductor and the second conductor's " ㄇ The internal filling of the "shaped" type is provided with a support core made of plastic or epoxy resin. The support core is bonded to the inner sidewalls of the first conductor and the second conductor by adhesive. The bottom surface of the support core is higher than the upper end of the first pin and the second pin.

[0011] It further includes two or more sets of rewinding coils, with multiple sets of rewinding coils arranged at the same interval along the direction of the first conductor and the second conductor, and the multiple sets of rewinding coils forming a series connection.

[0012] The plug-in integrated stamping hollow inductor designed using this technical solution has the following advantages compared to existing hollow inductors wound with enameled wire into a hollow spiral column:

[0013] 1. The hollow inductor in this solution is integrally stamped from a metal sheet, which simplifies processing, increases automation and production efficiency, and ensures high consistency in product dimensions and structure. It is suitable for hollow inductor products with high precision inductance tolerance requirements. This avoids the problem of existing hollow coils wound into hollow spiral columns, where stress gradually releases during transportation and use, causing the coil to loosen, spring back, or deform, leading to dimensional changes and inconsistencies in inductance accuracy.

[0014] 2. This solution uses a one-piece stamping process to form a metal sheet, which makes the end face of the inductor flat and provides support pins, making the connection between the inductor and the circuit board more stable when plugging it in.

[0015] 3. This solution uses a metal sheet to be stamped in one piece, directly machining the plug pins in one piece. Unlike traditional enameled wires, there is no need to remove the enamel coating to bring out the plug pins, which facilitates production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an existing hollow spiral columnar inductor structure.

[0017] Figure 2 This is a schematic diagram of an embodiment of the rewinding coil assembly of this utility model.

[0018] Figure 3 This is a schematic diagram of the two support pins structure of the rewinding coil assembly of this utility model.

[0019] Figure 4 This is a schematic diagram of the supporting inner core structure in the rewinding coil assembly of this utility model.

[0020] Figure 5 This is a schematic diagram of an embodiment of the two sets of rewinding coils of this utility model. Detailed Implementation

[0021] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this disclosure.

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

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "rear end", "front end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] The following describes in detail embodiments of the present application, examples of which 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] This technical solution provides a plug-in type integral stamping hollow inductor, which includes at least one set of rewinding coil group 1. The specific structural features of the rewinding coil group 1 are described in detail below. The following embodiments are only for illustrating the technical solution of this application. The specific structures shown in the following embodiments and the accompanying drawings are not limited to the only shape and structure of the technical solution of this application.

[0027] Example 1

[0028] Please refer to Figures 2 to 4 The present invention provides a plug-in type integral stamping hollow inductor, comprising a set of rewinding coil groups 1. Each set of rewinding coil groups 1 includes a strip-shaped first conductor 101 and a second conductor 102 with multiple bends. The first conductor 101 and the second conductor 102 are arranged side by side at intervals. The rear ends of the first conductor 101 and the second conductor 102 are provided with connecting parts 103. The front ends of the first conductor 101 and the second conductor 102 are respectively provided with vertically downward first pins 104 and second pins 105. The first conductor 101, the second conductor 102, the connecting parts 103, the first pins 104 and the second pins 105 are integrally stamped from a metal sheet.

[0029] Preferably, both the first conductor 101 and the second conductor 102 are in the form of " ㄇ The circuit has a three-section bend, with the width of the first pin 104 being smaller than the width of the first conductor 101, and the width of the second pin 105 being smaller than the width of the second conductor 102. When the first pin 104 and the second pin 105 are plugged into the circuit board, the bottom front end of the first conductor 101 and the second conductor 102 abuts against the circuit board, thus limiting the insertion of the first pin 104 and the second pin 105.

[0030] Furthermore, the bottom of the connecting part 103 is flush with the bottom of the first conductor 101 and the second conductor 102, which facilitates the stable insertion of the inductor into the circuit board during insertion. The bottom of the connecting part 103 is provided with a support pin, which is integrally formed by stamping the first conductor 101, the second conductor 102, the connecting part 103, the first pin 104, and the second pin 105 with a metal sheet.

[0031] Furthermore, the support pins are vertically downwards, and the support pins are either the third pin 106 located at the center of the bottom of the connecting part 103, or the fourth pin 107 and the fifth pin 108 located on both sides of the bottom of the connecting part 103. By providing support pins, the stability of the inductor and circuit board during assembly is improved, as they provide positioning and support.

[0032] Preferably, the metal sheet is made of copper.

[0033] Preferably, the entire surface of the rewinding coil assembly 1 is electroplated with an anti-oxidation layer, or the entire rewinding coil assembly 1 is subjected to tin-immersion treatment. This facilitates easier soldering of the inductor components to the pads and through-holes on the circuit board after insertion, and helps to improve the stability and firmness of the soldering.

[0034] Reference Figure 4 Preferably, the first conductor 101 and the second conductor 102 are " ㄇ The internal filling of the "shaped" structure includes a support core 2 made of plastic or epoxy resin. The support core 2 is bonded to the inner walls of the first conductor 101 and the second conductor 102 by adhesive. The bottom surface of the support core 2 is higher than the upper ends of the first pin 104 and the second pin 105. This design addresses the issue that, given the required inductance, the first conductor 101 and the second conductor 102, after being integrally stamped, are prone to wobbling or deformation when the metal sheet is thin. Therefore, the support core 2 is provided to achieve overall shaping and allows for insertion of components by clamping the support core 2.

[0035] Example 2

[0036] Please refer to Figure 5 The present technical solution proposes a plug-in integrated stamped hollow inductor composed of two sets of rewinding coil groups 1. The two sets of rewinding coil groups 1 are arranged side by side at the same interval along the direction of the first conductor 1 and the second conductor 2, and the two sets of rewinding coil groups are connected in series.

[0037] It should be noted that, referring to Figure 5The plug-in type integral stamping hollow inductor proposed in this technical solution includes at least one set of rewound coil groups 1. Specific embodiments with two sets of rewound coil groups 1 are listed. For more than two sets, the structural principle is the same as the series connection of two sets of rewound coil groups 1. The spacing and width between the first conductor 1, the second conductor 2, ..., the Nth conductor can be adjusted based on values ​​obtained from limited testing experiments to adjust the required inductance. The first conductor 1 and the Nth conductor are respectively provided with a first pin 104 and a second pin 105 at their front ends. The front ends of the remaining adjacent conductors are provided with connecting bodies to achieve series connection, forming the rewound coil. Similarly, the inductor with multiple sets of rewound coil groups 1 connected in series can also be filled with a supporting core 2 to provide overall support for the inductor and facilitate automated clamping and loading of the inductor components.

[0038] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A plug-in type integrally stamped hollow inductor, characterized in that, It includes at least one set of rewinding coils (1), each set of rewinding coils (1) includes a strip-shaped first conductor (101) and a second conductor (102) with multiple bends. The first conductor (101) and the second conductor (102) are arranged side by side at intervals. The rear ends of the first conductor (101) and the second conductor (102) are provided with a connecting part (103). The front ends of the first conductor (101) and the second conductor (102) are respectively provided with a vertically downward first pin (104) and a second pin (105). The first conductor (101), the second conductor (102), the connecting part (103), the first pin (104), and the second pin (105) are integrally stamped by metal sheet.

2. The plug-in type integrally stamped hollow inductor according to claim 1, characterized in that, The first conductor (101) and the second conductor (102) are both in the form of " ㄇ The circuit is bent into three sections. The width of the first pin (104) is smaller than the width of the first conductor (101), and the width of the second pin (105) is smaller than the width of the second conductor (102). When the first pin (104) and the second pin (105) are plugged into the circuit board, the bottom front end of the first conductor (101) and the second conductor (102) abuts against the circuit board, thereby limiting the insertion of the first pin (104) and the second pin (105).

3. The plug-in type integrally stamped hollow inductor according to claim 2, characterized in that, The bottom of the connecting part (103) is on the same surface as the bottom of the first conductor (101) and the second conductor (102). The bottom of the connecting part (103) is provided with a support pin. The support pin, the first conductor (101), the second conductor (102), the connecting part (103), the first pin (104), and the second pin (105) are integrally formed by stamping with a metal sheet.

4. The plug-in type integrally stamped hollow inductor according to claim 3, characterized in that, The support pins are vertically downward. The support pins are the third pin (106) located at the middle of the bottom of the connecting part (103), or the fourth pin (107) and the fifth pin (108) located on both sides of the bottom of the connecting part (103). The third pin (106), the fourth pin (107) and the fifth pin (108) serve as limit and support when the hollow inductor is installed in the circuit board in a plug-in manner.

5. The plug-in type integrally stamped hollow inductor according to claim 1 or 3, characterized in that, The metal sheet is made of copper.

6. The plug-in type integrally stamped hollow inductor according to any one of claims 1-4, characterized in that, The entire surface of the rewinding coil assembly (1) is electroplated with an anti-oxidation layer, or the entire rewinding coil assembly (1) is tin-immersed.

7. The plug-in type integrally stamped hollow inductor according to claim 2, characterized in that, The first conductor (101) and the second conductor (102) ㄇ The inner filling of the “shaped” type is provided with a support core (2) made of plastic or epoxy resin. The support core (2) is bonded to the inner wall of the first conductor (101) and the second conductor (102) by adhesive. The bottom surface of the support core (2) is higher than the upper end of the first pin (104) and the second pin (105).

8. The plug-in type integrally stamped hollow inductor according to claim 1, characterized in that, It includes two or more sets of rewinding coils (1), and the multiple sets of rewinding coils (1) are arranged side by side at the same interval along the direction of the first conductor (101) and the second conductor (102), and the multiple sets of rewinding coils (1) are connected in series.

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