Novel coated chip-mounted inductor

Abstract

The utility model relates to a novel coated surface-mounted inductor which comprises a magnetic core, the magnetic core is sequentially divided into a limiting disc, a wrapping post and a mounting disc from top to bottom, an enameled wire is wound on the wrapping post to form a coil, magnetic glue is coated on the outer side of the coil to form a magnetic glue layer wrapping the coil, and lead wires are arranged at the two ends of the enameled wire; two threading holes are formed in the mounting disc, metal conductive sleeves are mounted in the threading holes in an interference manner, and leads at two ends of the enameled wire are respectively clamped in the two metal conductive sleeves; and two symmetrical bonding pads are embedded at the bottom end of the mounting plate, and are welded with the tail end of the lead and the bottom end of the metal conductive sleeve. The beneficial effects are that the magnetic rubber layer prevents the coil from loosening and protects the outer side of the coil, thereby preventing the problems of electric leakage and short circuit caused by coil wear; the metal conductive sleeve is used for fixing the lead for the first time, and the bonding pad is welded with the lead and the metal sleeve for fixing the lead for the second time, so that the lead is prevented from being unsoldered, and the stable power-on performance of the lead and the bonding pad is ensured.

Description

Technical Field

[0001] The utility model relates to the field of inductors, in particular to a novel coated and patchable inductor. Background Art

[0002] A chip inductor is an inductor that can conduct large currents and is widely used in the modern electronics industry.

[0003] The existing chip inductors have the following problems:

[0004] 1. After the coil is wound, due to the lack of protection, it is easy to cause coil leakage and short circuit due to friction between adjacent coils or wear during storage and transportation.

[0005] 2. The leads of the coil are easily de-soldered from the pads, resulting in poor contact of the coil.

[0006] Therefore, we provide a novel coated and patchable inductor to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the above problems existing in the prior art and provide a novel coated and patchable inductor.

[0008] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0009] A novel coated and patchable inductor includes an I-shaped magnetic core. The magnetic core is successively divided into a limiting disc, a winding column, and an installation disc from top to bottom. A coil is formed by winding enameled wire on the winding column. A magnetic glue layer that wraps the coil is formed by applying magnetic glue on the outside of the coil. The two ends of the enameled wire are leads that conduct electricity after removing the insulating paint layer. Two vertically penetrating wire holes are opened on the installation disc. Metal conductive sleeves are installed in the wire holes with an interference fit. The leads at both ends of the enameled wire are respectively clamped in the two metal conductive sleeves. Two symmetric pads are embedded and installed at the bottom end of the installation disc. The pads are welded to the ends of the leads and the bottom ends of the metal conductive sleeves.

[0010] Wherein, a stamping hole for the punch to stamp the lead and the metal conductive sleeve is arranged on the side surface of the installation disc. The stamping hole is communicated with the wire hole, and the central axis of the stamping hole is perpendicular to the central axis of the wire hole.

[0011] Wherein, the stamping hole is filled with magnetic glue to form a magnetic glue column that plugs the stamping hole.

[0012] Wherein, a flared expansion foot is arranged at the bottom of the metal conductive sleeve, and the expansion foot is completely embedded in the pad.

[0013] Wherein, the bottom end of the expansion foot is higher than the bottom end of the installation disc.

[0014] Among them, the outer diameter of the enlarged foot is greater than the diameter of the wire passing hole, the outer diameter of the upper part of the metal conductive sleeve is equal to the diameter of the wire passing hole, and the inner diameter of the upper part of the metal conductive sleeve is equal to the diameter of the lead wire.

[0015] The beneficial effects of the utility model are as follows: a magnetic glue layer that wraps the coil is formed by applying magnetic glue on the outer side of the coil, preventing the coil from loosening and protecting the outer side of the coil, thereby preventing leakage and short - circuit problems caused by coil wear; a metal conductive sleeve is press - fitted in the wire passing hole, the lead wire is clamped in the metal conductive sleeve, and the lead wire is fixed once by the metal conductive sleeve, and then the lead wire is fixed twice by welding the pad with the lead wire and the metal sleeve, thereby preventing the lead wire from being desoldered and ensuring stable power - on performance between the lead wire and the pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the utility model, and constitute a part of this application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the magnetic core in the utility model;

[0018] Figure 2 is a schematic structural diagram of the inductor in the utility model;

[0019] Reference numeral description in the figure: magnetic core 1, limiting disc 11, winding column 12, mounting disc 13, wire passing hole 131, stamping hole 132, coil 2, lead wire 21, magnetic glue layer 3, metal conductive sleeve 4, enlarged foot 41, pad 5, magnetic glue column 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will refer to the drawings and combine with embodiments to detail the utility model.

[0021] As Figure 1 and Figure 2 shown, a new type of coated and sealable surface - mountable inductor includes an I - shaped magnetic core 1. The magnetic core 1 is divided into a limiting disc 11, a winding column 12, and a mounting disc 13 from top to bottom. A coil 2 is formed by winding enameled wire on the winding column 12, and a magnetic glue layer 3 that wraps the coil is formed by applying magnetic glue on the outer side of the coil 2. The magnetic glue layer 3 prevents the coil from loosening and protects the outer side of the coil, thereby preventing leakage and short - circuit problems caused by coil wear.

[0022] The two ends of the enameled wire are conductive leads 21 after removing the insulating paint layer. Two vertically penetrating wire holes 131 are provided on the mounting plate 13. A metal conductive sleeve 4 is press-fitted in the wire holes 131. The leads 21 at both ends of the enameled wire are respectively clamped in the two metal conductive sleeves 4. Specifically, a stamping hole 132 for the punch to stamp the leads 21 and the metal conductive sleeve 4 is provided on the side of the mounting plate 13. The stamping hole 132 is communicated with the wire hole 131, and the central axis of the stamping hole 132 is perpendicular to the central axis of the wire hole 131.

[0023] After the punching process of the leads 21 and the metal conductive sleeve 4 is completed with a punch, magnetic glue is filled in the stamping hole 132 to form a magnetic glue column 6 that seals the stamping hole.

[0024] Two symmetric solder pads 5 are embedded and installed at the bottom end of the mounting plate 13. The solder pads 5 are welded to the ends of the leads 21 and the bottom ends of the metal conductive sleeves 4.

[0025] In order to further improve the welding firmness between the solder pad and the metal conductive sleeve 4, a flared expansion foot 41 is provided at the bottom of the metal conductive sleeve 4. The bottom end of the expansion foot 41 is higher than the bottom end of the mounting plate 13, and the expansion foot 41 is completely embedded in the solder pad 5; the outer diameter of the expansion foot 41 is larger than the diameter of the wire hole 131, the outer diameter of the upper part of the metal conductive sleeve 4 is equal to the diameter of the wire hole 131, and the inner diameter of the upper part of the metal conductive sleeve 4 is equal to the diameter of the lead 21.

[0026] A metal conductive sleeve is press-fitted in the wire hole, the lead is clamped in the metal conductive sleeve, and the lead is fixed once by the metal conductive sleeve. Then, the lead is fixed twice by welding the solder pad to the lead and the metal sleeve, so as to prevent the lead from becoming unsoldered and ensure the stable power-on performance between the lead and the solder pad.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A novel patchable inductor with coating and sealing, characterized in that: It includes an I-shaped magnetic core, which is divided into a limit disc, a winding column, and an installation disc from top to bottom in sequence. A coil is formed by winding enameled wire around the winding column. A magnetic glue layer that wraps the coil is formed by applying magnetic glue on the outside of the coil. The two ends of the enameled wire are leads that conduct electricity after removing the insulating paint layer. Two vertically penetrating wire holes are provided on the installation disc, and metal conductive sleeves are installed in the wire holes with an interference fit. The leads at both ends of the enameled wire are respectively clamped in the two metal conductive sleeves. Two symmetric solder pads are embedded and installed at the bottom end of the installation disc, and the solder pads are welded to the ends of the leads and the bottom ends of the metal conductive sleeves.

2. The inductor according to claim 1, wherein: A punching hole for the punch to punch the lead and the metal conductive sleeve is provided on the side of the installation disc. The punching hole is communicated with the wire hole, and the central axis of the punching hole is perpendicular to the central axis of the wire hole.

3. The inductor according to claim 2, characterized in that: The punching hole is filled with magnetic glue to form a magnetic glue column that plugs the punching hole.

4. The inductor according to claim 1, wherein: A flared expansion foot is provided at the bottom of the metal conductive sleeve, and the expansion foot is completely embedded in the solder pad.

5. The inductor according to claim 4, characterized in that: The bottom end of the expansion foot is higher than the bottom end of the installation disc.

6. The inductor according to claim 4, wherein: The outer diameter of the expansion foot is larger than the diameter of the wire hole. The outer diameter of the upper part of the metal conductive sleeve is equal to the diameter of the wire hole, and the inner diameter of the upper part of the metal conductive sleeve is equal to the diameter of the lead.

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