Annular inductor with split shell

Abstract

The annular inductor comprises an inductor body and an insulation shell, a magnetic core protection shell is arranged in the center of the inductor body, coil baffles are evenly arranged on the outer portion of the magnetic core protection shell, the insulation shell comprises a shell outer ring and a shell bottom plate, buckle holes are formed in the side faces of the shell outer ring respectively, and the coil baffles are arranged on the shell bottom plate. A buckle matched with the outer ring of the shell is arranged on the inner side face of the outer edge of the shell bottom plate, a coil partition plate is arranged in the middle of the shell bottom plate, and a pin wire passing hole used for positioning a winding pin of an inductor is formed in the bottom face of the shell bottom plate. According to the utility model, through the buckle structure, the housing outer ring and the housing bottom plate are detachably separated, and the problems of complex assembly and pin dislocation of a traditional housing are avoided. Therefore, the assembly efficiency is improved, the manufacturing cost is reduced, and the structure is suitable for compact electronic equipment and has high practical value and popularization prospect.

Description

Technical Field

[0001] This utility model relates to the field of toroidal inductors, and more particularly to a toroidal inductor with a split-type housing. Background Technology

[0002] Toroidal inductors are widely used in electronic devices. To ensure their normal operation and prevent short circuits or other safety hazards, an insulating shell is usually added to the outside of the inductor body. This insulating shell effectively improves the inductor's safety, but it can bring additional difficulties during assembly, especially when the inductor has a large number of winding leads, which need to pass through holes in the bottom of the shell for fixation. In existing designs, due to the large number and dense arrangement of the winding leads, precise alignment is required during assembly; otherwise, misalignment or bending of the winding leads can easily occur, hindering installation and reducing production efficiency.

[0003] To address this issue, a common solution in existing technologies is to add a base plate with corresponding holes on the bottom of the housing. During assembly, the inductor winding leads are first passed through the holes on the base plate to fix their relative positions; then, the holes on the base plate are aligned with the bottom holes of the housing, allowing the inductor to be fully installed. While this solution improves assembly operability, it also introduces new problems. First, the additional step of installing the base plate complicates the production process, extending overall assembly time and hindering mass production. Second, the base plate, as an additional component, increases material and mold costs, thus affecting the product's market competitiveness. Furthermore, the addition of the base plate increases the overall height of the toroidal inductor, limiting its application in miniaturized electronic products. Finally, because the base plate needs to precisely mate with the housing holes, additional tolerance control is required in the design, increasing manufacturing complexity.

[0004] Therefore, how to optimize the assembly method, reduce manufacturing costs, and improve assembly efficiency while ensuring the insulation of the toroidal inductor has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model aims to propose a toroidal inductor with a split-shell structure, thereby solving the problem of inconvenient assembly of the winding leads of existing toroidal inductors with shells.

[0006] To achieve the above objectives, the technical solution of this utility model is: a ring-shaped inductor with a split outer shell, comprising an inductor body and an insulating shell. A magnetic core protective shell is disposed at the center of the inductor body, and coil baffles are uniformly disposed on the outside of the magnetic core protective shell. The insulating shell comprises an outer ring and a bottom plate. The outer ring has snap-fit ​​holes on its sides, and the inner side of the outer edge of the bottom plate has snap-fits that cooperate with the outer ring. A coil partition is disposed in the middle of the bottom plate, and the bottom surface of the bottom plate has lead through holes for positioning the winding leads of the inductor body.

[0007] Compared with the prior art, the technical effects of this utility model are:

[0008] To address the problems of difficult assembly, high production costs, and increased overall size of existing toroidal inductor housings, this invention provides a split-shell toroidal inductor that optimizes the structural design, improves assembly convenience, and effectively reduces manufacturing costs.

[0009] Firstly, in the prior art, in order to facilitate the inductor winding leads passing through the holes at the bottom of the housing, an additional base plate is usually used for pre-positioning. However, this utility model uses a split housing design, so that the base plate of the housing directly serves as a guide plate. During assembly, the winding leads of the inductor body can be passed through the holes in the base plate to complete the initial positioning and fixation. Then, the outer ring of the housing is installed and fixed by a snap-fit ​​structure, eliminating the need for an additional base plate. This simplifies the assembly process, reduces labor costs, and reduces the number of parts, which helps to improve production efficiency.

[0010] Secondly, traditional solutions require an additional base plate, which not only increases material and mold costs but also leads to an increase in overall size, hindering the miniaturization design of electronic products. This invention combines the housing base plate and guiding function into one unit, reducing the number of components and lowering manufacturing costs. Simultaneously, it effectively controls the overall height and volume of the toroidal inductor, making it more suitable for compact electronic devices and enhancing the product's market competitiveness.

[0011] Furthermore, since this utility model adopts a snap-fit ​​structure to connect the outer ring of the outer shell, the assembly is simpler and faster than the traditional method of fixing with screws. At the same time, it reduces the high requirements for processing precision, improves the stability and consistency of production, and reduces the defect rate caused by assembly errors.

[0012] In summary, this utility model, through reasonable structural improvements, optimizes the assembly method, reduces additional parts, improves production efficiency, and lowers overall costs while ensuring the insulation of the toroidal inductor. It has good practical value and promising prospects for promotion. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is an exploded view of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the inductor body of this utility model;

[0016] Figure 4 This is a schematic diagram of the shell base plate structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the low-position hole on the outer ring of the shell of this utility model;

[0018] Figure 6 This is a schematic diagram of the high-position hole on the outer ring of the shell of this utility model.

[0019] In the picture:

[0020] 1. Inductor body; 1-1. Winding pins; 1-2. Coil baffle; 2. Outer ring of housing; 2-1. Low-position hole; 2-2. High-position hole; 2-3. Flanged edge; 2-4. Long latching part to avoid obstruction; 3. Base plate of housing; 3-1. Short latch; 3-2. Long latch; 3-3. Limiting boss; 3-4. Coil partition; 3-5. Pin through hole; 3-6. Side wall; 3-7. Side skirt. Detailed Implementation

[0021] like Figure 1-2 As shown, a ring-shaped inductor with a split-type shell includes an inductor body 1 and an insulating shell, wherein the insulating shell includes an outer ring 2 and a bottom plate 3.

[0022] like Figure 3 As shown, the inductor body 1 has a magnetic core protective shell at its center, and coil baffles 1-2 are evenly arranged on the protective shell to separate each turn of the coil winding. Due to safety regulations regarding the distance between turns, the coil baffles 1-2 prevent multiple turns of the coil from touching each other. The bottom of the coil winding includes multiple winding leads 1-1.

[0023] like Figure 4As shown, the inner side of the outer edge of the housing base plate 3 is provided with multiple clips that mate with the outer ring 2 of the housing, including short clips 3-1 and long clips 3-2. A cross-shaped coil partition 3-4 is provided in the middle to ensure a safe distance in accordance with safety regulations. A limiting boss 3-3 is provided on the side of the column of the coil partition 3-4 to position the inductor body 1 and prevent the inductor body 1 from rotating inside the housing. The limiting boss 3-3 will be locked in the middle of the coil baffle 1-2 to prevent the inductor body 1 from rotating significantly. The bottom surface of the housing base plate 3 is also provided with lead through holes 3-5 for positioning the inductor winding leads. A side wall 3-6 is provided on the inner side of the side skirt 3-7 of the base plate to mate with the inner wall of the outer ring 2 of the housing. The diameter of the side wall 3-6 matches the diameter of the inner wall of the outer ring 2 of the housing with a clearance fit to prevent horizontal displacement between the housing base plate 3 and the outer ring 2 of the housing.

[0024] like Figure 5 and Figure 6 As shown, each side of the outer ring 2 of the shell is provided with a low hole 2-1 and a high hole 2-2 that mate with the short buckle 3-1 and the long buckle 3-2 of the shell bottom plate. At the bottom of the high hole 2-2, there is a clearance part 2-4 for the long buckle, and at the other end corresponding to the opening end, there is a flange 2-3 to increase strength and prevent deformation.

[0025] This structure utilizes a design of snap fasteners of varying lengths to achieve stress dispersion and gradient deformation matching, improving assembly convenience and structural stability. Longer snap fasteners offer greater flexibility, while shorter ones provide stronger rigidity, effectively reducing stress concentration and preventing damage caused by excessive force at a single point. During assembly, the longer snap fasteners contact and guide deformation first, followed by the shorter ones locking, creating a staged assembly process that reduces the impact of instantaneous assembly forces and simplifies operation. The longer snap fasteners primarily resist axial separation forces, while the shorter ones enhance lateral shear resistance, making the connection more secure and preventing loosening. The sidewalls fit tightly against the inner wall of the outer ring of the shell, ensuring horizontal stability, while the bottom plate side skirt contacts the bottom edge of the outer ring to prevent vertical displacement. The flanged structure enhances rigidity, preventing snap fastener dislodgement due to deformation and improving overall durability. This design optimizes the assembly process, reduces human error, and simultaneously improves connection strength and seismic performance.

[0026] During assembly, first align the cross-shaped coil partition 3-4 of the housing base plate 3 and insert it into the gap in the center of the magnetic core protective shell of the inductor body 1. Ensure that each edge of the coil partition 3-4 corresponds to and is embedded between a set of coil baffles 1-2 to guarantee the correct positioning of the inductor body 1 and the housing base plate 3. Then, sequentially pass the winding leads 1-1 of the inductor body 1 through the lead wire holes 3-5 of the housing base plate 3 to allow the winding leads to be smoothly led out.

[0027] To fix the housing base plate 3 and the inductor body 1, one of the following two methods can be used: apply glue between the limiting boss 3-3 and the coil baffle 1-2 to make the two firmly bonded; or use the snap-fit ​​structure set on the coil baffle 3-4 to snap it onto the magnetic core protective shell of the inductor body 1 to achieve physical fixation in an environmentally friendly glue-free manner.

[0028] After the inductor body 1 is fixed to the housing base plate 3, the housing outer ring 2 is installed. First, align the long latch 2-4 of the housing outer ring 2 with the long latch 3-2 of the housing base plate 3, and insert it at an angle. Apply appropriate force to make the long latch 3-2 snap into the high hole 2-2 of the housing outer ring 2. Then, align the short latch 3-1 with the low hole 2-1, and apply appropriate pressure to its side to make the short latch 3-1 snap into the low hole 2-1 to complete the assembly.

[0029] After assembly, the relative positions of the shell base plate 3 and the shell outer ring 2 remain stable, effectively preventing horizontal and vertical displacement. The side walls 3-6 fit tightly against the inner wall of the shell outer ring 2, ensuring horizontal stability; while the base plate side skirts 3-7 contact the bottom edge of the shell outer ring 2, preventing vertical movement of the shell base plate 3. Furthermore, one side of the shell outer ring 2 is supported by the side walls 3-6, minimizing deformation; the other side features flanges 2-3 that enhance structural rigidity, preventing deformation that could cause the snap-fit ​​to dislodge, ensuring a secure and difficult-to-loosen snap-fit ​​connection.

[0030] The structure of this utility model optimizes the assembly process, making assembly more convenient while significantly improving the stability and durability of the shell, making it suitable for various application scenarios.

Claims

1. A toroidal inductor with split housing, comprising an inductor body (1) and an insulating housing, characterized in that: The center of the inductance body (1) is provided with a magnetic core protection shell, the outer part of the magnetic core protection shell is uniformly provided with a coil baffle (1-2), the insulating shell comprises a shell outer ring (2) and a shell bottom plate (3), the side surface of the shell outer ring (2) is respectively provided with a buckle hole, the inner side of the outer edge of the shell bottom plate (3) is provided with a buckle matched with the shell outer ring (2), the middle part of the shell bottom plate (3) is provided with a coil partition plate (3-4), and the bottom surface of the shell bottom plate (3) is provided with a pin through hole (3-5) for positioning the winding pin (1-1) of the inductance body (1).

2. The toroidal inductor with split housing according to claim 1, characterized in that: The buckle holes in the side surface of the shell outer ring (2) are two, which are a low hole (2-1) and a high hole (2-2); the buckles correspondingly provided on the shell bottom plate (3) are two, which are a short buckle (3-1) and a long buckle (3-2).

3. The toroidal inductor with split housing of claim 1, wherein: The upright column side edge of the coil partition plate (3-4) is provided with a limiting boss (3-3) for being embedded with the coil baffle (1-2) of the inductance body (1).

4. The toroidal inductor with split housing of claim 1, wherein: The bottom edge of the shell bottom plate (3) is provided with a side skirt (3-7), the inner side of the side skirt (3-7) is provided with a side wall (3-6), and the outer wall diameter of the side wall (3-6) matches the inner wall diameter of the shell outer ring (2).

5. The toroidal inductor with split housing of claim 2, wherein: The bottom of the high hole (2-2) of the shell outer ring (2) is provided with an avoiding long buckle part (2-4).

6. The toroidal inductor with split housing of claim 1, wherein: The top of the shell outer ring (2) is provided with a turned edge (2-3) for enhancing the structural strength and preventing the deformation of the shell outer ring (2).

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