High-permeability inductor

Abstract

The utility model discloses a high-permeability inductor. Relates to the technical field of inductors. Comprising a base and a magnetic powder cover wrapping the outer side of the base, a wrapping post and a coil are arranged on the base, the coil is wound on the wrapping post and located at the top of the base, a lead part is arranged at the end of the coil, the front end of the lead part is attached to the top of the base, and the magnetic powder cover is arranged on the base. The rear end of the lead portion is folded downwards and attached to the bottom of the base, the bottom of the base is provided with a pair of limiting grooves, the limiting grooves extend in the width direction of the base, one end of each limiting groove is communicated with the side wall of the base, and the other end of each limiting groove is communicated with the side wall of the base. The rear end of the lead part is attached to the side wall of the base and folded into the limiting groove, a plurality of grooves are formed in the groove bottom of the limiting groove, and the rear end of the lead part is attached to groove openings of the grooves. According to the invention, the stability of the coil on the wrapping post can be improved, so that the product quality is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of inductors, in particular to a high-permeability inductor. BACKGROUND

[0002] T-core is an integrally formed electromagnetic induction element, which is a new generation of upgraded product of a winding inductor and is mainly used for impeding current change, realizing functions such as filtering, oscillation and delay, and has characteristics such as high magnetic permeability, large current resistance, impact resistance and stable temperature rise, and is very suitable for application in a power management module of a light and thin intelligent mobile terminal product, and can also be applied in multiple fields such as automobiles, aviation and aerospace.

[0003] The T-core inductor is generally formed by the following steps: a base is formed through cold pressing, a coil is wound on the base, and the base with the coil is filled with magnetic powder and hot pressed, so that the formed inductor is obtained. A Chinese patent document with the publication number CN213124033U discloses an integrated inductor electronic element, and specifically discloses a magnetic core, the inside of the magnetic core is provided with a coil, an alloy filler is arranged between the magnetic core and the coil, the outside of the magnetic core is covered with an insulating shell, the inside of the magnetic core is provided with a U-shaped groove, the lower end of the U-shaped groove is provided with a bottom plate, the end portions of two lead wires of the coil are electrode pins, and the two lead wires of the coil are in a bent structure. The utility model bends the two lead wires of the coil to the back of the magnetic core, and limits the coil through the side wall and the bottom plate of the magnetic core, so that the strength requirement of the magnetic core is reduced.

[0004] However, in the above patent, although the two lead wires can form a limiting effect on the coil after being bent to the back of the magnetic core, the lead wires still have a displacement allowance during hot pressing, and the limiting effect on the coil is limited. Utility model content

[0005] In order to overcome the defects of the prior art, the application provides a high-permeability inductor.

[0006] The application adopts the following technical scheme: a high-permeability inductor, comprising a base and a magnetic powder cover wrapped outside the base, a winding column and a coil are arranged on the base, the coil is wound on the winding column and located at the top of the base, an end portion of the coil is provided with a lead wire portion, a front end of the lead wire portion is attached to the top of the base, a rear end of the lead wire portion is folded downward and attached to the bottom of the base, a pair of limiting grooves are arranged at the bottom of the base, the limiting grooves extend along the width direction of the base, one end of the limiting groove is communicated with the side wall of the base, the rear end of the lead wire portion is attached to the side wall of the base and folded into the limiting groove, a plurality of grooves are arranged at the groove bottom of the limiting groove, and the rear end of the lead wire portion is attached to the groove opening of the groove.

[0007] Optionally, the side wall of the base is provided with two notches and the base is in the shape of a convex character, a pair of the limiting grooves are symmetrically arranged at the two sides of the bottom of the base, the end of one limiting groove is communicated with one notch, and the end of the other limiting groove is communicated with the other notch.

[0008] Optionally, the bottom of the magnetic powder cover is provided with a bevel, the bevel is located between the pair of limiting grooves, the bevel extends in the same direction as the limiting grooves, and the bevel penetrates the pair of side walls of the magnetic powder cover.

[0009] Optionally, the inner wall of the limiting groove is provided with a pair of accommodation grooves, the accommodation grooves are arranged on the inner wall in the length direction of the limiting groove, the pair of accommodation grooves are symmetrically arranged along the axial direction of the limiting groove, the bottom of the accommodation groove is communicated with the bottom of the base, and the accommodation groove is provided with a clamping piece, and the pair of clamping pieces clamp the lead part.

[0010] Optionally, a glue layer is arranged between the clamping piece and the accommodation groove, and the glue layer is used for fixing the clamping piece.

[0011] Compared with the prior art, in the application, through the arrangement of the limiting groove and the clamping piece in the limiting groove, it is ensured that the lead part can be reliably limited in the limiting groove after being folded to the bottom of the base, so that displacement cannot be generated in the process of hot pressing, the stability of the coil on the winding column is improved, and the quality of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a sectional view of the internal structure of the application;

[0013] Figure 2 is a top view of the base;

[0014] Figure 3 is a sectional view of the internal structure of the base;

[0015] Figure 4 is a bottom view of the base;

[0016] Figure 5 is Figure 3 is an enlarged structural schematic view of A in the application;

[0017] In the figure: 1, base; 11, winding column; 12, coil; 13, lead part; 14, limiting groove; 141, groove; 142, accommodation groove; 15, notch; 16, clamping piece; 160, glue layer; 2, magnetic powder cover; 20, bevel. DETAILED DESCRIPTION

[0018] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] like Figures 1-5 As shown, a high permeability inductor includes a base 1 and a magnetic powder cover 2 wrapped around the outside of the base 1. The base 1 is provided with a winding post 11 and a coil 12. The coil 12 is wound on the winding post 11 and located at the top of the base 1. The end of the coil 12 is provided with a lead portion 13. The front end of the lead portion 13 is attached to the top of the base 1, and the rear end of the lead portion 13 is folded down and attached to the bottom of the base 1. The bottom of the base 1 is provided with a pair of limiting grooves 14. The limiting grooves 14 extend along the width direction of the base 1. One end of the limiting groove 14 is connected to the side wall of the base 1. The rear end of the lead portion 13 is attached to the side wall of the base 1 and folded into the limiting groove 14. The bottom of the limiting groove 14 is provided with a plurality of grooves 141. The rear end of the lead portion 13 is attached to the groove opening of the groove 141.

[0020] When the rear end of the lead wire 13 is folded into the limiting groove 14, the limiting groove 14, whose size matches that of the lead wire 13, effectively limits the position of the lead wire 13, preventing it from changing during subsequent hot pressing. Furthermore, since the bottom of the limiting groove 14 is also provided with a recess 141, during hot pressing, the corresponding position of the lead wire 13 will be recessed into the recess 141, significantly improving the installation stability of the lead wire 13 on the base 1.

[0021] The base 1 has two notches 15 on its side wall and is convex in shape. A pair of limiting grooves 14 are symmetrically arranged on both sides of the bottom of the base 1. The end of one limiting groove 14 communicates with one notch 15, and the end of the other limiting groove 14 communicates with the other notch 15. The lead wire 13 is bent through the notch 15, which can prevent the lead wire 13 from protruding to the outer edge of the base 1, making the final product shape more regular.

[0022] The bottom of the magnetic powder cover 2 is provided with a bevel 20, which is located between a pair of limiting grooves 14. The bevel 20 and the limiting grooves 14 extend in the same direction and penetrate through a pair of sidewalls of the magnetic powder cover 2. In subsequent processing, the bevel 20 can be used as a positioning and limiting point to improve placement stability.

[0023] The inner wall of the limiting groove 14 is provided with a pair of accommodating grooves 142, which are arranged on the inner wall in the length direction of the limiting groove 14 and are symmetrically arranged along the axial direction of the limiting groove 14. The bottom of the accommodating groove 142 is in communication with the bottom of the base 1. The accommodating groove 142 is provided with a clamping piece 16, and the pair of clamping pieces 16 clamps the lead part 13. During the hot pressing process, the clamping piece 16 will expand towards the inside of the limiting groove 14, thereby improving the limiting effect on the lead part 13. A glue layer 160 is arranged between the clamping piece 16 and the accommodating groove 142, and the glue layer 160 is used to fix the clamping piece 16. In this way, the clamping piece 16 can be reliably fixed in the accommodating groove 142 and can expand into the limiting groove 14.

[0024] The above-described embodiments are merely preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A high permeability inductor comprising a base (1) and a magnetic powder cover (2) wrapped outside the base (1), a winding post (11) and a coil (12) being provided on the base (1), the coil (12) being wound on the winding post (11) and located on the top of the base (1), the end of the coil (12) being provided with a lead portion (13), the front end of the lead portion (13) being attached to the top of the base (1), the rear end of the lead portion (13) being folded downward and attached to the bottom of the base (1), characterized in that, The bottom of the base (1) is provided with a pair of limiting grooves (14) extending along the width direction of the base (1), one end of the limiting groove (14) is communicated with the side wall of the base (1), the rear end of the lead wire part (13) is attached to the side wall of the base (1) and is folded into the limiting groove (14), the groove bottom of the limiting groove (14) is provided with a plurality of grooves (141), and the rear end of the lead wire part (13) is attached to the groove opening of the groove (141).

2. A high permeability inductor according to claim 1, wherein The side wall of the base (1) is provided with two notches (15) and the base (1) is in the shape of a convex letter, a pair of limiting grooves (14) are symmetrically arranged on the two sides of the bottom of the base (1), the end of one limiting groove (14) is communicated with one notch (15), and the end of the other limiting groove (14) is communicated with the other notch (15).

3. A high permeability inductor according to claim 2, wherein The bottom of the magnetic powder cover (2) is provided with a bevel (20), the bevel (20) is located between a pair of limiting grooves (14), the bevel (20) extends in the same direction as the limiting groove (14), and the bevel (20) penetrates a pair of side walls of the magnetic powder cover (2).

4. A high permeability inductor according to claim 2, wherein A pair of accommodating grooves (142) are arranged on the inner wall of the limiting groove (14), the accommodating groove (142) is arranged on the inner wall in the length direction of the limiting groove (14), a pair of accommodating grooves (142) are symmetrically arranged in the axial direction of the limiting groove (14), the bottom of the accommodating groove (142) is communicated with the bottom of the base (1), a clamping piece (16) is arranged in the accommodating groove (142), and a pair of clamping pieces (16) clamp the lead wire part (13).

5. A high permeability inductor according to claim 4, wherein A glue layer (160) is arranged between the clamping piece (16) and the accommodating groove (142), and the glue layer (160) is used for fixing the clamping piece (16).

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