An inductor

Abstract

This utility model discloses an inductor, including a magnetic core, a coil wound on the magnetic core, and a first lead wire and a second lead wire led out from the coil. The improvement lies in the inclusion of: a base with a downwardly recessed cavity on its upper part; the coil and magnetic core being horizontally positioned and housed within the cavity; and encapsulating adhesive, filling and curing within the cavity, thus completely encapsulating and fixing the coil and magnetic core within the cavity. This structure, by horizontally positioning the coil and magnetic core within the base cavity and completely encapsulating and fixing them with encapsulating adhesive, significantly improves the integrity of the inductor structure and its resistance to vibration and temperature changes, effectively preventing internal component displacement and ensuring the stability of the inductance value.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to an inductor. Background Technology

[0002] Inductors, as key passive components in electronic circuits, are widely used in filtering, energy storage, and signal tuning. In existing technologies, the mounting structure and fixing method of inductors directly affect their performance stability and reliability. For example, Chinese patent publication number CN207966664U discloses an inductor structure for easy installation, which achieves solderless installation through a pin and baffle design, simplifying the assembly process. However, this structure has shortcomings in internal fixing: the coil and magnetic core lack effective positioning and encapsulation, making them prone to displacement under vibration or temperature changes, leading to inductance drift or unreliable electrical connections. Furthermore, existing inductors mostly employ vertical mounting or external fixing methods, resulting in limited internal insulation and heat dissipation performance, making it difficult to meet the stability and durability requirements of high-density circuit designs.

[0003] Therefore, there is an urgent need for a new type of inductor structure that can improve the fixation of the coil and magnetic core through internal packaging and positioning design, and ensure the performance consistency of the inductor in complex environments. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an inductor with a stable structure, reliable internal positioning, easy installation and strong adaptability, which addresses the problems of unstable performance and insufficient installation reliability caused by poor fixing of the coil and magnetic core in existing inductor structures, susceptibility to vibration or temperature changes.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an inductor, comprising a magnetic core, a coil wound on the magnetic core, and a first lead wire and a second lead wire led out from the coil, and further comprising: The base has a recessed cavity formed on its upper surface; The coil and magnetic core are arranged horizontally and housed within the cavity; And encapsulating adhesive, which fills and cures in the cavity, thereby encapsulating and fixing the coil and magnetic core in the cavity.

[0006] Furthermore, the first pin is led out from the outside of one end of the coil, and the second pin is led out from the middle of the coil.

[0007] Furthermore, both the first pin and the second pin extend upward from the base.

[0008] Furthermore, at least one of the first pin and the second pin is fitted with an insulating protective tube.

[0009] Furthermore, the outer surface of the coil is covered with an insulating layer.

[0010] Furthermore, the insulating layer is a multi-layer insulating tape.

[0011] Furthermore, the base is provided with through holes for mounting and fixing.

[0012] Furthermore, the bottom wall of the cavity is provided with an upwardly protruding positioning part, which abuts against the bottom of the coil.

[0013] Furthermore, the positioning part and the base are integrally formed.

[0014] The beneficial effects of this utility model are as follows: I. This structure significantly improves the integrity of the inductor structure and its resistance to vibration and temperature changes by horizontally placing the coil and magnetic core in the recessed cavity of the base and fixing them with encapsulating glue. It effectively prevents the displacement of internal components and ensures the stability of the inductance value.

[0015] Second, the positioning part design at the bottom of the cavity enables precise positioning of the coil, simplifies the assembly process, and further enhances the structural reliability.

[0016] Third, the pin layout is reasonable and can be equipped with an insulating protective tube, which not only facilitates installation and connection but also improves the electrical safety performance of the product.

[0017] Fourth, the base has built-in mounting holes, which allows the inductor to be easily and securely installed in various application scenarios, making it widely applicable. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the present invention.

[0022] Figure 4 for Figure 1 Another embodiment of the structure is shown in the schematic diagram.

[0023] Explanation of reference numerals in the attached drawings: 1. First pin line; 2. Second pin line; 3. Coil; 4. Tape; 5. Base; 501. Through hole; 502. Cavity; 503. Positioning part; 6. Encapsulating adhesive; 7. Heat shrink tubing. Detailed Implementation

[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The specific embodiments described in this section are only for explaining this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0025] like Figures 1 to 4 As shown, the inductor provided by this utility model mainly includes a magnetic core (not separately labeled), a coil 3, a first lead wire 1, a second lead wire 2, a base 5, and encapsulating glue 6.

[0026] The base 5 is preferably integrally molded from insulating plastic material using an injection molding process, resulting in high structural strength and good electrical insulation performance. The upper surface of the base 5 is recessed downwards to form a cavity 502, which accommodates the core component of the inductor. The bottom wall of the cavity 502 also has an upwardly protruding positioning part 503, which is integrally formed with the base 5. In this embodiment, the positioning part 503 consists of two strip-shaped protrusions, which can stably support and restrict the bottom position of the coil 3, preventing horizontal movement. The positioning part 503 allows for a certain space between the magnetic core and the cavity 502, allowing more encapsulating adhesive 6 to fill this space, thus better securing the magnetic core to the cavity 502.

[0027] The magnetic core (e.g., a ferrite core) and the coil 3 wound around it together constitute the inductor body. The inductor body is placed horizontally in the cavity 502, with its bottom abutting against the positioning part 503, thereby achieving precise positioning. The outer surface of the coil 3 is pre-covered with an insulating layer 4, which is preferably made of multiple layers of insulating tape (such as Mylar tape) tightly wound together, effectively ensuring the interlayer insulation and overall mechanical strength of the coil.

[0028] The first lead wire 1 and the second lead wire 2, extending from coil 3, serve as the external electrical connection terminals of the inductor. Specifically, the first lead wire 1 extends from the outside of one end of coil 3, while the second lead wire 2 extends from the middle of coil 3 (e.g., at the tap). This wiring method helps optimize inductor performance. Both lead wires extend upwards from the base 5 for easy soldering to the circuit board. To further enhance safety, insulating protective tubes 7 (such as heat shrink tubing) can be fitted onto the first lead wire 1 and / or the second lead wire 2 to cover areas where there is a risk of short circuit to the outside.

[0029] To securely encapsulate the entire inductor body within the base 5, the cavity 502 is filled with liquid encapsulating adhesive 6 (e.g., epoxy resin). This encapsulating adhesive 6 immerses the lower end face of the coil 3 and the magnetic core, and is subsequently cured by heating or ultraviolet irradiation to form a solid overall structure that effectively resists the effects of harsh environments such as vibration, impact, and humid heat.

[0030] In addition, at least one through hole 501 is provided at the corner of the base 5 for passing through fasteners such as screws, so as to securely mount the entire inductor to the device base plate or heat sink.

[0031] The assembly process is briefly described below: First, the coil 3, covered with the insulating layer 4, is placed horizontally into the cavity 502 of the base 5, with its bottom close to the positioning part 503. Next, the first lead wire 1 and the second lead wire 2 are led out and arranged according to the preset path. Then, an appropriate amount of encapsulating adhesive 6 is precisely injected into the cavity 502, allowing it to fully penetrate and cover the lower part of the coil 3. Finally, the assembly is placed under curing conditions to harden the encapsulating adhesive 6, thereby obtaining an inductor product with a complete structure and stable performance.

[0032] The manufacturing process and structural requirements of this utility model are as follows: The winding of coil 3 is carried out by a double winding method. The model is PSF610060*2 and the base size is T26.5×100×100mm. However, those skilled in the art can adjust it according to actual needs.

[0033] Base structure: The bottom is equipped with a base plate with dimensions of T26.5×100×100mm, with a foot spacing of 80mm and a row spacing of 80mm. The hole diameter includes four 5mm round holes and one 10mm round hole in the middle.

[0034] Fixing method: Apply a ring of black glue to the joint between the coil and the base plate; first fix the coil and the base plate with two 8×300mm cable ties and apply glue, then cut off the cable ties after they have dried.

[0035] Coil 3 wrapping: The outer periphery of coil 3 is wrapped with two layers of 15mm high-temperature tape.

[0036] First lead wire 1 and second lead wire 2: First lead wire 1 and second lead wire 2 are covered with φ4×470mm black heat shrink tubing. The lead wire length measured from the top of the magnetic ring is 450±10mm, of which the solder part is 10±1mm.

[0037] The electrical performance parameters of this utility model are as follows: Inductance value: Test point L1-2, under the conditions of 1kHz, 0.3V, and internal resistance of 100Ω, the nominal value is 1.35mH±10%, and the test instrument is TH2819XB.

[0038] DC resistance: No test point or conditions specified; the test instrument is CH502.

[0039] Withstand voltage test: The test points include the coil and the magnetic core (COIL-CORE), the conditions are AC1000V, 5mA, duration of 3 seconds, and the test instrument is CH9053.

[0040] Insulation resistance: The test points include the primary and secondary windings (PRI-SEC) and the coil and core (COIL-CORE). The conditions are 500VDC, and the minimum value is required to be 100MΩ. The test instrument is CH9053.

[0041] The list of materials used in this utility model is as follows: The materials used to manufacture inductors are as follows: Magnetic core: Model PSF610060*2, the magnetic core is made of ferrite material.

[0042] Enameled wire: Model number xEIW / 180 or QZY-x / 180, UL certificate number E348247.

[0043] Encapsulating adhesive 6: Model A68A / B, UL certificate number E470582, the encapsulating adhesive is an epoxy resin material.

[0044] Base 5: Model GEM-R1 2T, UL certificate number E224772.

[0045] Heat shrink tubing 7: Models include CB-HFT, CB-HFT(XY), CYG-MT*125℃, UL certificate number is E180908.

[0046] Tape 4: Model HKT 200℃, UL certificate number E328315, tape 4 is a multi-layer high-temperature tape.

[0047] The above content fully reflects the technical details and material information in the tables of the instruction manual, ensuring that the manufacturing and testing of the inductor meet the design requirements.

[0048] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An inductor comprising a magnetic core, a coil (3) wound on the magnetic core, and a first lead (1) and a second lead (2) extending from the coil (3), characterized in that, Also includes: The base (5) has a recessed cavity (502) formed on its upper surface. The coil (3) and the magnetic core are arranged horizontally and housed within the cavity (502); and The encapsulating adhesive (6) fills and cures the cavity (502) to cover and fix the coil (3) and the magnetic core in the cavity (502).

2. The inductor according to claim 1, characterized in that, The first pin (1) is led out from the outside of one end of the coil (3), and the second pin (2) is led out from the middle of the coil (3).

3. The inductor according to claim 1, characterized in that, Both the first pin line (1) and the second pin line (2) extend upward from the base (5).

4. The inductor according to claim 1, characterized in that, An insulating protective tube (7) is fitted on at least one of the first pin line (1) and the second pin line (2).

5. The inductor according to claim 1, characterized in that, The outer surface of the coil (3) is covered with an insulating layer (4).

6. The inductor according to claim 5, characterized in that, The insulating layer (4) is a multilayer insulating tape.

7. The inductor according to claim 1, characterized in that, The base (5) is provided with a through hole (501) for installation and fixing.

8. The inductor according to claim 1, characterized in that, The bottom wall of the cavity (502) is provided with an upwardly protruding positioning part (503), which abuts against the bottom of the coil (3).

9. The inductor according to claim 8, characterized in that, The positioning part (503) and the base (5) are integrally formed.

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