阅读说明：本技术 可调式贴片电感器及其制备方法 (Adjustable patch inductor and preparation method thereof ) 是由 钟景高 肖倩 黎燕林 王东 朱建华 王上衡 王胜刚 于 2019-09-25 设计创作，主要内容包括：本发明实施例提供了一种可调式贴片电感器及其制备方法,可调式贴片电感器包括磁芯、绕设于磁芯上的线圈绕组以及若干端电极,线圈绕组由导体材料沿着磁芯的周侧间隔绕制于磁芯上,线圈绕组中的单个线圈的底面之两侧分别设有端电极,若干端电极呈阵列式排布于线圈绕组的底面,磁芯设有用于固定各线圈位置的限位槽。通过在线圈绕组的底部设有呈阵列式排布的若干端电极,这样,则可根据实际使用需求选用任意两个端电极做为电感器的输入和输出,通过选用不同的两个端电极实现电感器输入和输出之间线圈绕组圈数的精确调整,从而实现电感量的精确调整和控制,使其具备电感量可调的功能,有效提升贴片电感器的适用性和灵活性。(The embodiment of the invention provides an adjustable chip inductor and a preparation method thereof, wherein the adjustable chip inductor comprises a magnetic core, a coil winding wound on the magnetic core and a plurality of end electrodes, the coil winding is wound on the magnetic core at intervals along the peripheral side of the magnetic core by conductor materials, the end electrodes are respectively arranged on two sides of the bottom surface of a single coil in the coil winding, the end electrodes are arranged on the bottom surface of the coil winding in an array manner, and the magnetic core is provided with a limiting groove for fixing the position of each coil. Through being equipped with a plurality of end electrodes that are array arrangement in coil winding's bottom, like this, then can choose for use arbitrary two end electrodes as the input and the output of inductor according to the in-service use demand, realize the accurate adjustment of coil winding number of turns between inductor input and the output through selecting for use two end electrodes of difference to realize the accurate adjustment and the control of inductance value, make it possess inductance value adjustable function, effectively promote paster inductor's suitability and flexibility.)

1. The utility model provides a paster inductor with adjustable includes the magnetic core, winds and locates coil winding and a plurality of end electrode on the magnetic core, a serial communication port, coil winding is followed by conductor material week side interval coiling of magnetic core in on the magnetic core, the both sides of the bottom surface of single coil in the coil winding are equipped with respectively the end electrode, and are a plurality of the end electrode be array arrange in coil winding's bottom surface, the magnetic core is equipped with and is used for fixing each the spacing groove of coil position.

2. The adjustable patch inductor according to claim 1, wherein the core comprises a base for supporting the coil winding and a cap covering the base, the base being slidably inserted into the coil winding, the adjustable patch inductor further comprising a fixing member for fixing the cap to the base.

3. The adjustable patch inductor according to claim 2, wherein a plurality of position-limiting strips are convexly disposed on a surface of the base near the top cover along a peripheral side of the base, any two adjacent position-limiting strips cooperate to form the position-limiting groove for positioning each coil, and the top cover is provided with a groove for receiving each position-limiting strip at a position corresponding to each position-limiting strip.

4. The adjustable patch inductor according to claim 3, wherein positioning blocks are protruded from two ends of one surface of the top cover facing the base, and positioning grooves are formed in the base corresponding to the positioning blocks.

5. The adjustable patch inductor according to claim 3, wherein the fixing member is an epoxy glue covering a joint between the top cover and the base.

6. The adjustable patch inductor as claimed in claim 1, wherein the coil includes a first section horizontally disposed on an end surface of the core, a second section extending downward along both ends of the first section in a height direction of the core, and a third section extending obliquely at a free end of one of the second sections in a direction toward the other of the second sections, the end electrode being disposed at a bottom end of each of the second sections, and the third section being electrically connected to another adjacent one of the coils.

7. The adjustable patch inductor as claimed in any one of claims 1 to 6, wherein the coil winding is integrally formed with the terminal electrode.

8. The adjustable patch inductor as claimed in any one of claims 1 to 6, wherein a plurality of the terminal electrodes are disposed in parallel on the bottom surface of the core, and the bottom ends of any two of the terminal electrodes are disposed on the same horizontal plane.

9. A preparation method of an adjustable patch inductor is characterized by comprising the following steps:

s01: manufacturing a magnetic core, wherein the magnetic core comprises a base and a top cover covering the base;

s02: manufacturing a conductor material into a spiral coil winding by adopting a mechanical processing and forming mode, and forming a plurality of array-type end electrodes at the bottom of the coil winding;

s03: and then assembling the coil winding, the base and the top cover, and bonding and fixing by adopting epoxy resin glue.

10. The method for manufacturing an adjustable patch inductor according to claim 9, further comprising, after the step of manufacturing the coil winding and the terminal electrode:

and forming a terminal electrode welding coating on the outer surface of the terminal electrode by adopting a surface treatment process on one surface of the coil winding, which is close to the terminal electrode.

Technical Field

The invention relates to the technical field of inductors, and particularly provides an adjustable patch inductor and a preparation method thereof.

Background

With the continuous progress of science and technology and the rapid development of information industry, large-scale and ultra-large-scale integrated circuits become mainstream and trend of development, the surface mount inductor has the characteristics of small volume, high space utilization rate and the like, is suitable for surface assembly and high-density surface mounting, can well meet the requirements of the integrated circuits, and has high practical value. At present, the chip inductor is mainly prepared on the basis of a lamination process and a winding process, wherein the inductor prepared on the basis of the lamination process has certain advantages in the aspects of small size and size standardization, but cannot well meet the use requirements of high inductance and large current. The inductor prepared based on the winding process has the characteristics of wide inductance coverage range, large working current and the like, but the inductance is relatively fixed, the function of adjustable inductance is generally not provided, and the requirements of users in the using and circuit debugging processes can not be well met.

Disclosure of Invention

The invention aims to provide an adjustable patch inductor, and aims to solve the technical problem that the inductance in the inductor in the prior art is not adjustable.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a paster inductor with adjustable include the magnetic core, around locating coil winding and a plurality of end electrode on the magnetic core, coil winding is followed by conductor material all sides interval coiling of magnetic core in on the magnetic core, the both sides of the bottom surface of single coil in the coil winding are equipped with respectively the end electrode, it is a plurality of the end electrode be array arrange in coil winding's bottom surface, the magnetic core is equipped with and is used for fixing each the spacing groove of coil position.

Optionally, the magnetic core includes a base for supporting the coil winding and a top cover covering the base, the base is slidably inserted into the coil winding, and the adjustable patch inductor further includes a fixing member for fixing the top cover to the base.

Optionally, the base is close to along on the one side of top cap the week side of base is protruding to be equipped with a plurality of spacing, arbitrary adjacent two spacing cooperation forms and is used for fixing a position each the spacing groove of coil, the top cap corresponds each the position of spacing is equipped with and is used for holding each the recess of spacing.

Optionally, the top cover is provided with positioning blocks protruding from two ends of one surface facing the base, and the base is provided with positioning grooves corresponding to the positioning blocks.

Optionally, the fixing piece is made of epoxy resin glue, and the epoxy resin glue covers the joint of the top cover and the base.

Optionally, the coil includes a first section horizontally disposed on an end surface of the magnetic core, a second section extending downward along two ends of the first section toward a height direction of the magnetic core, and a third section extending obliquely from a free end of one of the second sections toward the other second section, the bottom end of each second section is provided with the end electrode, and the third section is electrically connected to another adjacent coil.

Optionally, the coil winding is integrally formed with the terminal electrode.

Optionally, the plurality of end electrodes are arranged in parallel on the bottom surface of the magnetic core, and the bottom ends of any two end electrodes are located on the same horizontal plane.

One objective of the present invention is to provide a method for manufacturing an adjustable patch inductor, which includes the following steps:

s01: manufacturing a magnetic core, wherein the magnetic core comprises a base and a top cover covering the base;

s02: manufacturing a conductor material into a spiral coil winding by adopting a mechanical processing and forming mode, and forming a plurality of array-type end electrodes at the bottom of the coil winding;

s03: and then assembling the coil winding, the base and the top cover, and bonding and fixing by adopting epoxy resin glue.

Optionally, after the coil winding and the terminal electrode are manufactured, the method further includes:

and forming a terminal electrode welding coating on the outer surface of the terminal electrode by adopting a surface treatment process on one surface of the coil winding, which is close to the terminal electrode.

The invention has the beneficial effects that: compared with the prior art, the adjustable chip inductor has the advantages that the end electrodes arranged in an array mode are arranged at the bottom of the coil winding, so that any two end electrodes can be selected as the input and the output of the inductor according to actual use requirements, and the accurate adjustment of the number of turns of the coil winding between the input and the output of the inductor is realized by selecting different two end electrodes, so that the accurate adjustment and control of the inductance are realized, the adjustable chip inductor has the function of adjusting the inductance, and the applicability and the flexibility of the chip inductor are effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a circuit board assembly structure of an adjustable patch inductor according to an embodiment of the present invention;

fig. 2 is a first schematic view of an assembly structure of a base and a coil winding according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a base and coil winding assembly structure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coil winding according to an embodiment of the present invention;

FIG. 5 is a first schematic structural diagram of a top cover according to an embodiment of the present invention;

fig. 6 is a second structural schematic diagram of the top cover according to the embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a base according to an embodiment of the present invention;

fig. 8 is a schematic flow chart of a manufacturing method of an adjustable patch inductor according to an embodiment of the present invention.

Wherein, in the drawings, the reference numerals are mainly as follows:

1-a magnetic core; 11-a base; 12-a top cover; 111-a spacing bar; 112-a limiting groove; 113-a positioning groove; 121-a positioning block; 122-a groove; 123-avoidance groove;

2-a coil winding; 21-first section; 22-second section; 23-third section; 24-terminal electrode.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 and fig. 2 together, a tunable chip inductor according to an embodiment of the present invention will be described. The adjustable chip inductor comprises a magnetic core 1, a coil winding 2 and a plurality of end electrodes 24, wherein the coil winding 2 is wound on the magnetic core 1, and the end electrodes 24 are connected with the coil winding 2, so that external current passes through the coil winding 2. The coil winding 2 is made of conductor materials wound on the magnetic core 1 at intervals along the peripheral side of the magnetic core 1, the conductor materials can be conventional conductor materials with certain mechanical strength such as copper alloy, aluminum alloy and silver alloy, or polymer metal composite conductor materials and new conductor materials doped with graphene or carbon nanotubes, the bottom surfaces of the single coils in the coil winding 2 are respectively provided with end electrodes 24, and the end electrodes 24 are arranged on the bottom surface of the coil winding 2 in an array manner, so that two different end electrodes 24 can be connected according to different requirements to obtain different inductance values in the inductor, and the applicability and flexibility of the chip inductor are effectively improved; the magnetic core 1 is provided with a limiting groove 112, wherein the width of the limiting groove 112 is slightly larger than the width of the conducting wire material, so that the conducting wire material can be placed into the limiting groove 112, so that the limiting groove 112 of the magnetic core 1 limits the displacement of the coil winding 2, and the coil winding 2 is fixed on the magnetic core 1. Preferably, the gap between the coil winding 2 and the contact between the coil winding 2 and the magnetic core 1 are filled with epoxy resin, so that the coil winding 2 is fixed on the magnetic core 1, the inductor is better protected, the influence of external impact on the coil winding 2 and the magnetic core 1 is reduced, the vibration resistance and the impact resistance of the chip inductor are improved, and the use stability is ensured.

Compared with the prior art, the adjustable patch inductor provided by the embodiment of the invention has the structure that the end electrodes 24 are respectively arranged on the two sides of the bottom surface of a single coil in the coil winding 2, a plurality of end electrodes 24 are distributed in an array on both sides of the bottom end of the magnetic core 1, and thus, different inductances can be selected according to actual needs during use, for example, if the inductance of a single turn is L0, the total number of turns N of the coil winding 2, the adjustable inductance value range is any one inductance value of L0, 4L0 and 9L0 … N2L0, the applicability and flexibility of the chip inductor can be effectively improved by connecting two different terminal electrodes 24 to obtain different inductance values in the inductor, and make several terminal electrodes 24 adopt the mode of array to distribute in the both sides of magnetic core 1 bottom to the installation reliability of having guaranteed this inductor is high. In addition, since the core 1 is provided with the stopper groove 112, the stopper groove 112 restricts the displacement of the coil winding 2 so that the coil winding 2 is fixed to the core 1.

Alternatively, referring to fig. 1 to 7 together, as a specific implementation of the adjustable patch inductor provided by the embodiment of the present invention, the magnetic core 1 includes a base 11 and a top cover 12, the base 11 can support the coil winding 2, the top cover 12 is covered on the base 11, the base 11 is slidably inserted into the coil winding 2, and correspondingly, the adjustable patch inductor further includes a fixing member (not shown) that can fasten the top cover 12 to the base 11, for example, the fixing member is a non-adhesive, a steel clip, or a fixed code. With the structure, when the magnetic core 1 is arranged in a split manner, the base 11 is inserted into the coil winding 2, the top cover 12 is arranged on the base 11, one surface of the top cover 12 opposite to the base 11 can be abutted against the coil winding 2, so that the coil winding 2 is stabilized on the magnetic core 1, and part of conductor material on one surface of the coil winding 2 close to the top cover 12 is wrapped on the contact surface of the top cover 12 and the base 11, so as to reduce magnetic leakage. Preferably, the magnetic core 1 can be made of manganese-zinc ferrite, which can meet the requirements of electromagnetic shielding, small leakage inductance and temperature rise of the transformer. Of course, in other embodiments, the magnetic core may be made of soft magnetic materials such as soft magnetic ferrite, iron powder core, soft magnetic material doped with polymer material, etc., or non-magnetic materials such as alumina ceramic, dielectric ceramic, non-magnetic polymer material, etc., without limitation.

Optionally, referring to fig. 1 and fig. 7 together, as a specific implementation manner of the adjustable patch inductor provided by the embodiment of the present invention, a plurality of limiting strips 111 are convexly disposed on one surface of the base 11 close to the top cover 12 along a circumferential side of the base 11, the plurality of limiting strips 111 are disposed at intervals along a length direction of the base 11, any two adjacent limiting strips 111 cooperate to form a limiting groove 112, the limiting groove 112 can be used for positioning each coil winding 2, correspondingly, a groove 122 is disposed at a position of one surface of the top cover 12 close to the base 11 corresponding to each limiting strip 111, when assembling, the limiting strips 111 can be installed in the corresponding grooves 122, so that the base 11 and the top cover 12 are in closer contact, so as to reduce a volume of the inductor. In this embodiment, the height of the limiting strip 111 is smaller than the height of the coil winding 2, and the avoiding grooves 123 are formed in the positions of the top cover 12 corresponding to the limiting grooves 112, so that a part of the conductor material exposed in the limiting grooves 112 extends into the corresponding avoiding grooves 123, so that the base 11 and the top cover 12 are more compact, and the size of the adjustable patch inductor is reduced.

Optionally, referring to fig. 1 to 7 together, as a specific implementation manner of the adjustable chip inductor according to the embodiment of the present invention, positioning blocks 121 are convexly disposed at two ends of one surface of the top cover 12 facing the base 11, and correspondingly, positioning grooves 113 are disposed at positions of the base 11 corresponding to the positioning blocks 121, so that the positioning blocks 121 are fastened to the positioning grooves 113 to enable the top cover 12 to be mounted on the base 11, so as to prevent sliding between the positioning blocks and the base 11, thereby effectively protecting the coil winding 2. Wherein, the base 11 and the top cover 12 are both in a cuboid structure, and the base 11 and the top cover 12 are consistent in size and shape, so that the inductor has good performance and is convenient to process and manufacture.

Alternatively, referring to fig. 1 to 7 together, as a specific implementation of the adjustable chip inductor according to the embodiment of the present invention, the fixing element is an epoxy resin adhesive, and the epoxy resin is covered on a joint of the top cover 12 and the base 11 to fix the coil winding 2, the top cover 12 and the base 11. In this embodiment, the epoxy resin is a two-component epoxy resin, which has good fluidity and small stress, so that the coil winding 2, the top cover 12 and the base 11 of the adjustable patch inductor form a whole, and thus the vibration and impact resistance of the inductor can be improved.

Alternatively, referring to fig. 1 and fig. 3 together, as a specific implementation of the adjustable patch inductor according to the embodiment of the present invention, the coil winding 2 includes a first section 21, two second sections 22 and a third section 23, wherein the first section 21 is horizontally disposed on an end surface of the magnetic core 1, the two second sections 22 respectively extend downward along end portions of the first section 21 toward a height direction of the magnetic core 1, the third section 23 is formed by obliquely extending a free end of one of the second sections 22 toward the other second section 22, a bottom end of each second section 22 is provided with an end electrode 24, the third section 23 is electrically connected to another adjacent coil winding 2, it can be understood that the first section 21 and the two second sections 22 form a frame-like framework, and the third section 23 inclines a bottom end of the framework and is connected to a bottom end of another framework. In the embodiment, the first segment 21 in the coil winding 2 is horizontally disposed, and the first segment 21 is disposed in the limiting groove 112 of the base 11, so that the limiting groove 112 is conveniently machined and manufactured, and the production cost is saved. In addition, by disposing the third section 23 obliquely at the bottom end of the magnetic core 1, when the inductor is soldered on an integrated circuit, the two terminal electrodes 24 in the coil winding 2 are offset from each other, so as to prevent the pads disposed on the integrated circuit from being parallel to each other and contacting each other, thereby protecting the circuit. Specifically, the coil winding 2 may be formed by directly molding conductor materials arranged clockwise or counterclockwise, and the conductor materials may be conventional conductor materials having a certain mechanical strength, such as copper alloy, aluminum alloy, silver alloy, and the like, or may be a polymer metal composite conductor material, or a new conductor material doped with graphene or carbon nanotubes, which is not limited herein. And end electrode 24 quantity can be 24 in coil winding 2, also can be the arbitrary natural number more than or equal to 4, thereby form adjustable paster inductor, its end electrode 24 array arranges in the inductor bottom, then can choose arbitrary two end electrodes 24 as the input and the output of inductor according to the in-service use demand for use, realize the accurate adjustment of 2 turns of coil winding between inductor input and the output through choosing two end electrodes 24 of difference for use, thereby realize the accurate adjustment and the control of inductance, make it possess inductance adjustable function, effectively promote paster inductor's suitability and flexibility.

Alternatively, referring to fig. 1 to 6 together, as a specific implementation of the tunable patch inductor according to the embodiment of the present invention, the coil winding 2 and the terminal electrode 24 are integrally formed, so that the stress at the contact position of the terminal electrode 24 and the coil winding 2 is reduced, and the strength of the terminal electrode 24 is high. In this embodiment, the conductor material is made into the spiral coil winding 2 by machining and forming, the array type end electrodes 24 are formed at the bottom of the coil winding 2, the spiral coil winding 2 is placed in the limit groove 112 of the magnetic core 1 to be mechanically assembled with the magnetic core, and the coil winding 2 is restrained and fixed, so that the installation reliability of the inductor is high, two different end electrodes 24 can be connected to obtain different inductance values in the inductor, and the applicability and flexibility of the chip inductor are effectively improved

Optionally, referring to fig. 1 to fig. 2 together, as a specific implementation manner of the adjustable chip inductor provided in the embodiment of the present invention, a plurality of terminal electrodes 24 are disposed in parallel on the bottom surface of the magnetic core 1, and the bottom ends of any two terminal electrodes 24 are located on the same horizontal plane, so as to ensure that the adjustable chip inductor is suitable for surface mounting, and further effectively improve the installation reliability of the inductor. Preferably, the position of the coil winding 2 corresponding to each of the terminal electrodes 24 may be formed with a terminal electrode welding coating (not shown) by using a surface treatment process such as chemical deposition, electrochemical deposition, physical vapor deposition, and the like, and the terminal electrode welding coating may be made of a material with good welding wettability such as tin alloy, palladium silver, gold, and the like, so as to effectively improve the weldability of the adjustable chip inductor.

Specifically, the assembly method of the adjustable patch inductor provided by the invention comprises the following steps: firstly, the base 11 is inserted into the coil winding 2 in a sliding manner, the coil winding 2 is arranged in the limiting groove 112 of the base 11, then the positioning block 121 of the top cover 12 and the positioning groove 113 of the base 11 are assembled and are bonded and fixed by epoxy bonding glue, so that the coil winding 2 is constrained in the limiting grooves 112 of the top cover 12 and the base 11, the relative fixation of the positions of the coil winding 2, the top cover 12 and the base 11 is further ensured, and the stability of the inductor is ensured.

Alternatively, referring to fig. 1 to fig. 3 together, as a specific implementation of the adjustable patch inductor provided in the embodiment of the present invention, a label (not shown) is disposed on a top surface of the magnetic core 1. The signboard can be directly formed on the surface of the magnetic core 1 by adopting a laser engraving technology or can be fixed on the top surface of the magnetic core 1 by an adhesive manner, for example, "100-12 Ts" is engraved on the signboard, wherein 100 and 12Ts in 100-12Ts respectively represent the nominal inductance and the maximum adjustable number of turns in 1 turn, and then the signboard is arranged on the electromagnet so as to distinguish and identify adjustable patch inductors with different electrical performance indexes.

In the present invention, a method for manufacturing an adjustable patch inductor is also provided, as shown in fig. 1 and 8, specifically, the method includes the following steps:

s01: manufacturing a magnetic core 1, wherein the magnetic core 1 comprises a base 11 and a top cover 12 covering the base 11;

specifically, the base 11 and the top cover 12 may be made of the same material, for example, the base 11 and the top cover 12 are made of soft magnetic material or non-magnetic material. Of course, the base 11 and the top cover 12 may be made of different materials, for example, the base 11 is made of a nonmagnetic material and the top cover 12 is made of a nonmagnetic material, or the base 11 is made of a nonmagnetic material and the top cover 12 is made of a soft magnetic material. Wherein, a plurality of spacing strips 111 are arranged on the base 11 in the horizontal direction near the top cover 12, and a spacing groove 112 is formed between any two adjacent spacing strips 111, so that when a lead in the coil winding 2 is placed in the spacing groove 112, the coil winding 2 can not move freely, thereby ensuring the stability of the piezoelectric sensor. A positioning block 121 is further disposed on a surface of the top cover 12 facing the base 11, a positioning groove 113 is further disposed on the base 11 corresponding to the positioning block 121, wherein the positioning block 121 and the positioning groove 113 are in interference fit, and the top cover 12 is fastened on the base 11.

S02: manufacturing a conductor material into a spiral coil winding 2 by adopting a machining forming mode, and forming an array type terminal electrode 24 at the bottom of the coil winding 2;

specifically, coil winding 2 comprises a plurality of single coils, and the both sides of single coil's bottom surface are equipped with end electrode 24 respectively, array's end electrode 24 has just been formed like this in coil winding 2's bottom, like this, then can choose arbitrary two end electrodes 24 for use as the input and the output of inductor according to the in-service use demand, realize the accurate adjustment of 2 turns of coil winding between inductor input and the output through two end electrodes 24 of chooseing for use different, thereby realize the accurate adjustment and the control of inductance value, make it possess inductance value adjustable function, effectively promote the suitability and the flexibility of paster inductor. In addition, the whole foot jig is needed to be used for carrying out flatness treatment on the end electrodes 24, so that the end electrodes 24 are located on two sides of the bottom surface of the magnetic core 1 in parallel, the bottom surfaces of the end electrodes 24 are located on the same horizontal line, the adjustable chip inductor is suitable for surface mounting, and meanwhile the installation reliability of a product can be effectively improved.

S03: then assembling the coil winding 2, the base 11 and the top cover 12, and bonding and fixing by adopting epoxy resin glue;

specifically, the base 11 is firstly inserted into the coil winding 2 in a sliding manner, the coil winding 2 is placed in the limiting groove 112 of the base 11, then the positioning block 121 of the top cover 12 is assembled with the positioning groove 113 of the base 11 and is bonded and fixed by using epoxy adhesive, a layer of epoxy adhesive can be coated on the base 11 which is assembled with the coil winding 2, then the top cover 12 is covered on the base 11, so that the coil winding 2 is constrained in the limiting grooves 112 of the top cover 12 and the base 11, and the relative fixation of the positions of the coil winding 2, the top cover 12 and the base 11 is ensured, so as to ensure the stability of the inductor.

Optionally, step S021 is further included after the coil winding 2 and the terminal electrode 24 are manufactured: and forming a terminal electrode welding coating on the outer surface of the terminal electrode 24 on one surface of the coil winding 2 close to the terminal electrode 24 by adopting a surface treatment process.

Specifically, the coil winding 2 may be formed with a terminal electrode welding coating by chemical deposition, electrochemical deposition, physical vapor deposition and other surface treatment processes at the position corresponding to each terminal electrode 24, and the terminal electrode welding coating may be made of tin alloy, palladium silver, gold or other materials with good welding wettability, so as to effectively improve the weldability of the adjustable chip inductor

In the invention, the plurality of end electrodes 24 arranged in an array form are arranged at the bottom of the coil winding 2, so that any two end electrodes 24 can be selected as the input and the output of the inductor according to the actual use requirement, and the accurate adjustment of the number of turns of the coil winding 2 between the input and the output of the inductor is realized by selecting different two end electrodes 24, thereby realizing the accurate adjustment and control of the inductance value, enabling the inductor to have the function of adjusting the inductance value, and effectively improving the applicability and the flexibility of the chip inductor. In addition, the coil winding 2 and the end electrodes 24 are integrally formed and manufactured, and the end electrodes 24 are arranged at the bottom of the coil winding 2 in parallel, so that the adjustable surface mount inductor is suitable for surface mounting, and the mounting reliability of a product can be effectively improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.