Surface-mounted choking coil inductor

Abstract

The utility model discloses a patch type choking coil inductor which comprises a base, a magnetic core and a coil, the top of the base is provided with a positioning hole used for positioning and connecting the magnetic core, the coil is wound on the periphery of the magnetic core, the bottom of the base is provided with a winding protrusion used for winding a wire leg, the winding protrusion is located below the magnetic core, and the winding protrusion is located below the magnetic core. According to the inductor provided by the invention, the wire pins of the coil can be wound on the wire winding bulges, and the wire pins wound on the wire winding bulges can be directly used as subsequent welding terminals after being soldered, so that the inductor can be conveniently assembled on a PCB (Printed Circuit Board) in a surface-mounted mounting manner, and the production efficiency is improved. And an original electroplating terminal is cancelled, and electroplating materials are not needed, so that the pollution to the environment can be reduced, and the environment-friendly requirement in the industry is better met. In addition, the winding protrusions of the inductor are arranged at the bottom of the base, and the projections of the winding protrusions on the top of the base are located in the top of the base, so that the transverse size of the inductor cannot be too large, and the requirement for patch type design and miniaturization design can be met at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a patch type choke coil inductor. Background Art

[0002] Traditional choke coil inductors in the electronics industry are generally plug-in structures, usually made of ferrite cores with I-shaped structures, and connected to copper-clad steel guide pins as terminals for connecting to the PCB. After the copper wire is wound on the core to make a coil, the starting end and the winding end of the copper wire need to be connected to the guide pins as contacts for plugging into the PCB. However, the ferrite core itself cannot be directly implanted with the guide pins, and epoxy resin and manual or other equipment are required to implant it. After implantation, if the guide pins are offset or abnormal, they need to be removed and re-implanted. When removing the abnormal guide pins, the core often breaks. Therefore, the terminal implantation cost is high, and the efficiency and product yield are low. Due to material cost issues, the price of guide pins has also risen sharply, and the current industry trend is miniaturization of electronic components, and the assembly process is also developing towards automated processes. Therefore, the demand for plug-in choke coil inductors has decreased year by year, and chip choke coil inductors in the industry have gradually become popular. However, the chip choke coil inductors that can be made at present mostly use a base that is relatively large in size or use electroplated terminals to meet the needs of the chip type. The base used needs to be larger than the size of the ferrite core, and the two lateral ends of the base are also extended outward to facilitate the use of electroplating materials to make electroplated terminals at the two lateral ends of the base to achieve the effect of chipization. Not only can it not meet the design requirements of miniaturization, it also does not conform to the current concept of green environmental protection. Due to the complex process and high material cost, it ultimately leads to reduced production efficiency and increased production costs of the inductor. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a chip choke coil inductor, which can improve the production and assembly efficiency of the inductor, reduce costs, and simultaneously meet the requirements of chip design, miniaturization design and green environmental protection.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a chip choke inductor, including a base, a magnetic core and a coil, the top of the base is provided with a positioning hole for positioning and connecting the magnetic core, the coil is wound around the outer circumference of the magnetic core, the bottom of the base has a winding protrusion, the winding protrusion is used to wind the wire feet of the coil, and the projection of the winding protrusion on the top of the base is located within the top of the base.

[0005] Compared with the prior art, the beneficial effect of the utility model is that: the inductor is provided with a winding protrusion for winding wire pins at the bottom of the base, and after the magnetic core is positioned and connected to the base and the coil is wound around the outer periphery of the magnetic core, the wire pins of the coil can be wound on the winding protrusion, and the wire pins wound on the winding protrusion can be used as subsequent welding terminals, which can not only simplify the production and assembly process of the inductor, but also facilitate the assembly of the inductor on the PCB by patch installation, thereby improving production efficiency and reducing production costs. The wound wire pins are not only easy to form, but also do not have the risk of deformation due to force, and the product yield is high. Even if rewinding is required, it will not cause damage to the magnetic core. In addition, the original electroplating terminals are eliminated, which can not only further simplify the production process of the inductor, but also reduce pollution to the environment, and better meet the green requirements in the industry. In addition, the winding protrusion of the inductor is arranged at the bottom of the base, and the projection of the winding protrusion on the top of the base is located within the top of the base, so that the lateral size of the inductor will not be too large, and it can meet the requirements of both surface mount design and miniaturization design.

[0006] In the above-mentioned chip choke coil inductor, a clearance gap is opened on the side of the base, and the clearance gap can allow the wire legs of the coil to pass through, and the winding protrusion is located below the clearance gap.

[0007] In the above-mentioned chip choke coil inductor, the outer end of the winding protrusion is provided with a stop structure, and the outer diameter of the stop structure is larger than the outer diameter of the winding protrusion.

[0008] In the above-mentioned chip choke coil inductor, a wire hooking groove is provided on the side of the stop structure.

[0009] In the above-mentioned chip choke coil inductor, the wire hooking groove is an oblique groove.

[0010] The above-mentioned chip choke coil inductor, the base is made of bakelite material.

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the choke coil inductor according to an embodiment of the utility model;

[0013] Figure 2 for Figure 1 An exploded view of the structure shown;

[0014] Figure 3 for Figure 1 Bottom view of the structure shown.

[0015] Description of the accompanying drawings: 100 base, 110 positioning hole, 120 winding protrusion, 130 clearance gap, 140 stop structure, 141 wire hook groove, 200 magnetic core, 300 coil, 310 wire foot. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below. Figures 1 to 3 The embodiment of the utility model provides a patch type choke coil inductor, including a base 100, a magnetic core 200 and a coil 300. The top of the base 100 is provided with a positioning hole 110 for positioning and connecting the magnetic core 200. The coil 300 is wound around the outer periphery of the magnetic core 200. The bottom of the base 100 has a winding protrusion 120. The winding protrusion 120 is located below the magnetic core 200. The winding protrusion 120 is used to wind the wire foot 310 of the coil 300, and the reference Figure 3 , the projection of the winding protrusion 120 on the top of the base 100 is located within the top of the base 100. The inductor is provided with a winding protrusion 120 for winding the wire pin 310 at the bottom of the base 100. After the magnetic core 200 is positioned and connected to the base 100 and the coil 300 is wound around the outer periphery of the magnetic core 200, the wire pin 310 of the coil 300 can be wound on the winding protrusion 120. The wire pin 310 wound on the winding protrusion 120 can be directly used as a subsequent welding terminal after soldering, which can not only simplify the production and assembly process of the inductor, but also facilitate the assembly of the inductor to the PCB by the patch installation method, thereby improving production efficiency and reducing production costs. The wound wire pin 310 is not only easy to form, but also does not have the risk of deformation due to stress, and the product yield is high. Even if it needs to be rewound, it will not cause damage to the magnetic core 200. The original electroplating terminal is cancelled, and there is no need to use electroplating materials, which can further simplify the production process of the inductor and reduce the pollution to the environment, which is more in line with the green requirements of the industry. In addition, the winding protrusion 120 of the inductor is arranged at the bottom of the base 100, and the projection of the winding protrusion 120 on the top of the base 100 is located inside the top of the base 100, so that the lateral size of the inductor will not be too large, and it can meet the requirements of the patch design and the miniaturization design at the same time.

[0017] Further, refer to Figure 1A clearance notch 130 is provided on the side of the base 100, and the clearance notch 130 is recessed inwardly, and the winding protrusion 120 is located below the clearance notch 130. When the magnetic core 200 is positioned and connected in the positioning hole 110, and the coil 300 is wound around the outer periphery of the magnetic core 200, the wire feet 310 of the coil 300 can be wound around the winding protrusion 120 at the bottom of the base 100, and the wire feet 310 between the winding protrusion 120 and the magnetic core 200 can pass through the clearance notch 130. Therefore, the design of the clearance notch 130 can meet the needs of the patch type design without increasing the lateral size of the base 100, and will not cause the wire feet 310 of the coil 300 to break due to excessive bending, and the wire feet 310 will not be exposed to the outside of the base 100, and are not easily hooked out by foreign objects and loosened. Furthermore, the positioning hole 110 on the top of the base 100 can be customized according to the required size of the magnetic core 200, and the winding protrusion 120 on the bottom of the base 100 always remains not protruding outward from the top periphery of the base 100, thereby realizing a miniaturized design of the inductor under a specific size of the magnetic core 200. The base 100 is made of bakelite material, which is a relatively environmentally friendly raw material, and can meet the design trend of low-carbon components in the industry and the green and environmentally friendly production concept.

[0018] Further, continue to refer to Figures 1 to 3 The outer end of the winding protrusion 120 is provided with a stopper structure 140, and the outer diameter of the stopper structure 140 is larger than the outer diameter of the winding protrusion 120, so as to prevent the wire pin 310 wound on the winding protrusion 120 from slipping outwards and spreading. Figure 3 As shown, the projection of the stop protrusion on the top of the base 100 should also be located inside the top of the base 100 as much as possible, or all of it should be located inside the top of the base 100. In this embodiment, the winding protrusion 120 and the stop structure 140 are both approximately rectangular in shape. At this time, the outer diameter of the winding protrusion 120 and the stop structure 140 mentioned here refers to the radius or diameter of the circumscribed circle of the winding protrusion 120 and the stop structure 140. In some other embodiments, the winding protrusion 120 and the stop structure 140 may also be cylindrical. Further, referring to Figure 1 and Figure 2 The stopper structure 140 is approximately rectangular, and a hooking groove 141 is provided on the side of the stopper structure 140. After the wire leg 310 is wound onto the winding protrusion 120, the end of the wire leg 310 is clamped into the hooking groove 141, thereby fixing the wire leg 310 to the stopper. Furthermore, the hooking groove 141 is an oblique groove, which is not only convenient for hooking the wire, but also makes it difficult for the hooked wire leg 310 to fall out of the hooking groove 141, thereby further increasing the reliability of fixing the wire leg 310 to the winding protrusion 120 and the stopper.

[0019] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0020] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A chip choke coil inductor, characterized in that: The invention comprises a base (100), a magnetic core (200) and a coil (300); the top of the base (100) is provided with a positioning hole (110) for positioning and connecting the magnetic core (200); the coil (300) is wound around the outer circumference of the magnetic core (200); the bottom of the base (100) has a winding protrusion (120); the winding protrusion (120) is used to wind the wire foot (310) of the coil (300); and the projection of the winding protrusion (120) on the top of the base (100) is located inside the top of the base (100).

2. The chip choke coil inductor according to claim 1, characterized in that: A clearance notch (130) is provided on the side of the base (100), and the clearance notch (130) can allow the wire legs (310) of the coil (300) to pass through, and the winding protrusion (120) is located below the clearance notch (130).

3. The chip choke coil inductor according to claim 1, characterized in that: A stop structure (140) is provided at the outer end of the winding protrusion (120), and the outer diameter of the stop structure (140) is greater than the outer diameter of the winding protrusion (120).

4. The chip choke coil inductor according to claim 3, characterized in that: A wire hooking groove (141) is provided on the side of the stop structure (140).

5. The chip choke coil inductor according to claim 4, characterized in that: The wire hooking groove (141) is an oblique groove.

6. The chip choke coil inductor according to claim 1, characterized in that: The base (100) is made of bakelite material.

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