Durable chip inductor

Abstract

The utility model discloses a durable chip inductor which comprises an upper magnetic core which comprises an upper cover, an upper fence and an upper stand column, the upper stand column is provided with a positioning hole with a polygonal cross section, the upper cover is provided with a positioning groove, and the bottom of the upper fence is provided with an upper limiting groove; the lower magnetic core comprises a lower cover, a lower enclosure and a lower stand column, the lower stand column is connected into the positioning hole in an inserted mode, a positioning piece is arranged at the top of the lower stand column and connected into the positioning groove in a clamped mode, and a lower limiting groove is formed in the top of the lower enclosure; the coil is wound on the upper stand column, the upper enclosure surrounds the periphery of the upper portion of the coil, the upper cover is located on the top face of the coil, the lower enclosure surrounds the periphery of the lower portion of the coil, the lower cover is located on the bottom face of the coil, conductive pins are arranged at the two ends of the coil, and the two conductive pins are clamped in the upper limiting groove and the lower limiting groove respectively. The inductor is stable in internal stress, stable in structural performance, high in weather resistance, long in effective service life, durable in overall structure and stable and reliable in inductive performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of patch inductance, in particular to a durable patch inductance. BACKGROUND

[0002] Patch inductance, also known as power inductance, surface mount high-power inductance, has the characteristics of miniaturization, high quality, high energy storage and low resistance, and is mainly used to realize current filtering, energy storage and signal transmission functions.

[0003] The inductance in general electronic circuits is a hollow coil or a coil with a magnetic core. The coil with a magnetic core can obtain higher electrical signal processing capability. In the related technology, the coil is wound around the magnetic core, and the connection between the magnetic core and the coil is realized through an adhesive agent. In the process of long-term use, the adhesive layer is prone to expansion and contraction due to aging or temperature changes, which can easily affect the stability of the connection structure between the magnetic core and the coil, and the effective service life of the inductance is short. SUMMARY

[0004] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a durable patch inductance, which has strong weather resistance, stable and durable structure, long effective service life and reliable inductance performance.

[0005] According to the durable patch inductance of the utility model embodiment, the utility model discloses a kind of:

[0006] Upper magnetic core includes upper cover, upper fence and upper stand, upper fence and upper stand are connected to the bottom of upper cover, upper stand is equipped with the positioning hole with polygonal cross section, upper cover is equipped with positioning groove, the top of positioning hole is connected to the groove bottom of positioning groove, the bottom of upper fence is equipped with upper limit slot;

[0007] Lower magnetic core includes lower cover, lower fence and lower stand, lower fence and lower stand are connected to the top of lower cover, lower stand is prismatic to match positioning hole, lower stand is connected in positioning hole, the top of lower stand is equipped with positioning piece, positioning piece is connected in positioning groove, the top of lower fence is equipped with lower limit slot;

[0008] Coil is wound around upper stand, upper fence surrounds the upper four quarters of coil, upper cover is located on the top surface of coil, lower fence surrounds the lower four quarters of coil, lower cover is located on the bottom surface of coil, both ends of coil are equipped with conductive pin, two conductive pins are respectively clamped in upper limit slot and lower limit slot.

[0009] In the embodiment, the positioning groove is a riveting groove, and the positioning piece is a riveting head. The riveting head is riveted and connected in the riveting groove.

[0010] In the embodiment, the positioning piece is a buckle, and the positioning groove is a clamping groove.

[0011] In the embodiment, the surface of the lower stand column is provided with an annular reinforcing groove, and the reinforcing groove is provided with a magnetic rubber ring.

[0012] In the embodiment, the upper magnetic core and the lower magnetic core are integrally formed in a soft magnetic ferrite structure.

[0013] In the embodiment, the coil is a coiled flat copper wire, and the height of the upper and lower enclosures is greater than or equal to the thickness of the flat copper wire.

[0014] In the embodiment, the conductive pin comprises an upper conductive sheet, an inclined conductive sheet and a lower conductive sheet connected in sequence, one end of the upper conductive sheet is connected to the end of the coil, the other end of the upper conductive sheet is connected to the top end of the inclined conductive sheet, the bottom end of the inclined conductive sheet is connected to one end of the lower conductive sheet, and the two inclined conductive sheets are respectively clamped in the upper and lower limiting grooves.

[0015] In the embodiment, the groove wall of the upper limiting groove away from the coil is provided with an upper curved surface matching one of the inclined conductive sheets, and the top end of the one of the inclined conductive sheets is located in the upper limiting groove, and the groove bottom of the lower limiting groove is provided with a lower curved surface matching the other inclined conductive sheet, and the top end of the other inclined conductive sheet is located in the lower limiting groove.

[0016] The embodiment of the utility model has at least the following beneficial effects:

[0017] By setting the positioning hole with a polygonal cross section on the upper stand column of the upper magnetic core and setting the lower stand column of the lower magnetic core as a prism matching the positioning hole, a polygonal plug-in connection structure between the upper stand column and the lower stand column is realized, which not only effectively simplifies the assembly alignment steps and reduces the assembly difficulty, thereby effectively improving the assembly efficiency, but also effectively avoids the relative rotation offset between the upper stand column and the lower stand column, and cooperates with the clamping connection structure of the positioning piece and the positioning groove to realize the positioning between the upper magnetic core and the lower magnetic core from multiple dimensions, thereby significantly improving the stability of the relative position between the upper magnetic core and the lower magnetic core, the structure of the patch inductor is reliable, and the mechanical positioning mode is used instead of the traditional chemical gluing mode, which can significantly reduce the changes caused by internal stress aging or temperature and humidity problems, the internal stress is stable, the structural performance is stable, the weather resistance is strong, the effective service life is long, the overall structure is durable, the inductance performance is stable and reliable; the upper enclosure and the lower enclosure are respectively arranged around the upper part and the lower part of the coil, and the upper cover and the lower cover are arranged on the top surface and the bottom surface of the coil, so as to form a stable coil positioning structure, the positions of the conductive pins at both ends of the coil are limited by the upper limiting groove and the lower limiting groove, so as to further enhance the connection stability between the coil and the magnetic core, the coil can be effectively prevented from loosening or shifting during long-term use, and the structure of the patch inductor is stable. BRIEF DESCRIPTION OF DRAWINGS

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

[0019] Figure 1 This is a three-dimensional structural diagram of a durable surface mount inductor according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of a durable surface mount inductor according to an embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the durable surface mount inductor according to an embodiment of the present invention.

[0022] Figure 4 This is a top view of the durable surface mount inductor according to an embodiment of the present invention;

[0023] Figure 5 The durable surface mount inductor of this utility model embodiment is along Figure 4 A schematic diagram of the cross-sectional structure of line A-A';

[0024] Figure 6 Another embodiment of the present invention is a durable surface mount inductor. Figure 4 A schematic diagram of the cross-sectional structure of line A-A'.

[0025] Figure label:

[0026] Upper magnetic core 100, upper cover 110, positioning groove 111, upper enclosure 120, upper limit groove 121, upper curved surface 122, upper column 130, positioning hole 131;

[0027] Lower magnetic core 200, lower cover 210, lower enclosure 220, lower limiting groove 221, lower curved surface 222, lower column 230, reinforcing groove 231, positioning component 240, magnetic rubber ring 250;

[0028] Coil 300, conductive pin 310, upper conductive plate 311, oblique conductive plate 312, lower conductive plate 313. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of the utility model, it needs to be understood that, if the direction description, such as up, down, left, right, front, back and other directions or positional relations indicated based on the drawing are described, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation of the utility model.

[0031] In the description of the utility model, if the line sleeve, support is described only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the utility model, unless otherwise specified, the words such as setting, installation and connection should be understood in a broad sense, and the skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0033] Chip inductance, also known as power inductance, surface mount high power inductance, has the characteristics of miniaturization, high quality, high energy storage and low resistance, mainly used for realizing current filtering, energy storage and signal transmission functions. The inductance in general electronic circuit is air coil or coil with magnetic core, and the coil with magnetic core can obtain higher electric signal processing capacity, in the related technology, the coil is wound on the magnetic core, and the connection between the magnetic core and the coil is realized by adhesive, in the process of long time use, the adhesive layer is easy to expand and shrink due to aging or temperature change, the internal stress changes continuously with the use process, which easily affects the stability of the connection structure between the magnetic core and the coil, and the reliability of the adhesive layer structure is also affected by the elastic force generated by the winding of the coil, the structure of the inductance cannot be guaranteed, and the effective service life of the inductance is short.

[0034] The traditional magnetic core structure often adopts simple cylindrical or rectangular design, and the coil is wound after the coil is wound, and there is no effective positioning and limiting mechanism, in the process of use, the adhesive structure for connection is easy to change the relative position between the coil and the magnetic core due to aging or temperature change, and then affect the electrical performance and reliability of the inductance. In addition, the conductive pin of the coil is usually directly welded or fixed on the magnetic core, and this fixing mode not only has complex process, but also the pin is easy to loosen, which reduces the durability and service life of the product.

[0035] The following refers to the drawings Figure 1 to the drawings Figure 6 The utility model discloses a durable chip inductance, which has strong weather resistance, stable and durable structure, long effective service life and reliable inductance performance.

[0036] Referring to Figures 1 to 6The utility model discloses a durable paster inductance, including:

[0037] The upper magnetic core 100 includes an upper cover 110, an upper fence 120 and an upper stand column 130, the upper fence 120 is connected to the bottom of the upper cover 110, and the upper fence 120 is arranged around the edge of the upper cover 110, the upper stand column 130 is connected to the center of the bottom of the upper cover 110, the upper stand column 130 is provided with a positioning hole 131 with a polygonal cross section, the upper cover 110 is provided with a positioning groove 111, the top end of the positioning hole 131 is connected to the groove bottom of the positioning groove 111, so that the positioning hole 131 and the positioning groove 111 are communicated, and the bottom of the upper fence 120 is provided with an upper limiting groove 121.

[0038] The lower magnetic core 200 includes a lower cover 210, a lower fence 220 and a lower stand column 230, the lower fence 220 is connected to the top of the lower cover 210, and the lower fence 220 is arranged around the edge of the lower cover 210, the lower stand column 230 is connected to the center of the top of the lower cover 210, the lower stand column 230 is in the form of a prism matching the positioning hole 131, and the lower stand column 230 is connected to the positioning hole 131 in a plug-in manner, the plug-in connection structure with a polygonal shape can effectively prevent the upper stand column 130 and the lower stand column 230 from rotating and deviating relative to each other, thereby effectively improving the stability of the relative position between the upper stand column 130 and the lower stand column 230, and the reliability of the overall structure can be effectively improved, the top of the lower stand column 230 is provided with a positioning piece 240 matching the positioning groove 111, the positioning piece 240 is clamped and connected to the positioning groove 111, and the top of the lower fence 220 is provided with a lower limiting groove 221.

[0039] The coil 300 is arranged around the outer surface of the upper stand column 130, the upper fence 120 surrounds the upper part of the coil 300, the upper cover 110 abuts against the top surface of the coil 300, the lower fence 220 surrounds the lower part of the coil 300, and the lower cover 210 abuts against the bottom surface of the coil 300, so that the coil 300 can be positioned comprehensively, both ends of the coil 300 are provided with conductive pins 310, and the two conductive pins 310 are clamped in the upper limiting groove 121 and the lower limiting groove 221 respectively, the upper limiting groove 121 and the lower limiting groove 221 are arranged to limit the positions of the two conductive pins 310 respectively, and the stability of the relative position between the coil 300 and the upper magnetic core 100 and the lower magnetic core 200 can be effectively improved.

[0040] When assembled, the coil 300 after winding is sleeved on the upper column 130, and then the upper column 130 is inserted into the positioning hole 131, at this time, the two conductive pins 310 are clamped into the upper limiting groove 121 and the lower limiting groove 221 respectively, the upper cover 110 and the upper surrounding block 120 are combined to cover the top of the coil 300, the bottom of the coil 300 is accommodated in the combined structure of the lower cover 210 and the lower surrounding block 220, the positioning piece 240 reaches the positioning groove 111, and the positioning piece 240 is clamped into the positioning groove 111 by an external device or by using the characteristics of the structure itself.

[0041] By setting the positioning hole 131 with a polygonal cross section on the upper column 130 of the upper magnetic core 100, and setting the lower column 230 of the lower magnetic core 200 as a prism matching the positioning hole 131, a polygonal plug-in connection structure between the upper column 130 and the lower column 230 is realized, which not only effectively simplifies the assembly alignment steps and reduces the assembly difficulty, thereby effectively improving the assembly efficiency, but also effectively avoids the relative rotation offset between the upper column 130 and the lower column 230, and cooperates with the clamping connection structure of the positioning piece 240 and the positioning groove 111 to realize the positioning between the upper magnetic core 100 and the lower magnetic core 200 from multiple dimensions, thereby significantly improving the stability of the relative position between the upper magnetic core 100 and the lower magnetic core 200. The structure of the patch inductor is reliable, and the mechanical positioning method is used instead of the traditional chemical gluing method, which is energy-saving and environmentally friendly, can significantly reduce the changes caused by internal stress due to aging or temperature and humidity problems, the internal stress is stable and the structural performance is stable, the adverse effects caused by the internal stress changes of the gluing connection can be eliminated, and the tearing effect of the gluing structure caused by the elastic force of the coil 300 itself can be ignored. winding structure, can effectively improve the stability of the connection structure between the two magnetic cores, thereby improving the stability of the coil 300 installed in the two magnetic core structure, the design difficulty is low, the weather resistance is strong, the effective service life is long, the overall structure is durable, and the inductance performance is stable and reliable;

[0042] By setting the upper surrounding block 120 and the lower surrounding block 220 around the upper part and the lower part of the coil 300 respectively, and setting the upper cover 110 and the lower cover 210 on the top surface and the bottom surface of the coil 300, a stable coil 300 positioning structure can be formed. The upper magnetic core 100 and the lower magnetic core 200 simultaneously serve as a support structure, compared with the additional support structure used for installation and positioning in some technologies, the patch inductor can effectively reduce the volume of the inductor, the positions of the two conductive pins 310 at both ends of the coil 300 are limited by the upper limiting groove 121 and the lower limiting groove 221, which can further enhance the connection stability between the coil 300 and the magnetic core, effectively prevent the coil 300 from loosening or shifting during long-term use, and the structure of the patch inductor is stable.

[0043] By optimizing the connection structure of the magnetic core and the coil 300, not only the stability and reliability of the structure are improved, but also the performance fluctuations caused by vibration or temperature changes are reduced, thereby significantly improving the durability and service life of the patch inductor; in addition, the polygonal connector connection and the limiting groove design simplify the production process, reduce the manufacturing cost, and are conducive to large-scale popularization and application.

[0044] It can be understood that, as shown in Figure 5 The positioning groove 111 is a riveting groove, and the positioning piece 240 is a riveting head. The riveting head is connected to the riveting groove by riveting. The lower vertical column 230 is inserted into the positioning hole 131, and when the riveting head reaches the riveting groove, the riveting head is riveted into the riveting groove by a riveting device, thereby realizing the positioning connection between the upper magnetic core 100 and the lower magnetic core 200, and the overall structure is stable and firm.

[0045] It should be noted that the positioning piece 240 and the positioning groove 111 can also be other structure combinations that can realize positioning connection. As shown in Figure 6 The positioning piece 240 is provided as a buckle, and the positioning groove 111 is provided as a clamping groove. The buckle is clamped in the clamping groove, and the positioning between the upper magnetic core 100 and the lower magnetic core 200 is realized by clamping.

[0046] It can be understood that the surface of the lower vertical column 230 is provided with an annular reinforcing groove 231, which is arranged around the circumferential surface of the lower vertical column 230. The magnetic glue ring 250 is arranged in the reinforcing groove 231. After the lower vertical column 230 is inserted into the positioning hole 131, the high friction coefficient of the magnetic glue ring 250 can effectively improve the stability of the positioning structure between the lower vertical column 230 and the upper vertical column 130. Magnetic glue is a general term for elastic body materials with magnetic properties, which is prepared from raw rubber, magnetic powder and other additives.

[0047] The magnetic glue ring 250 can generate a transverse elastic force on the lower vertical column 230 and the upper vertical column 130, thereby improving the stability of the connection structure between the upper vertical column 130 and the lower vertical column 230, and finally improving the stability of the relative position between the upper magnetic core 100 and the lower magnetic core 200.

[0048] It can be understood that the upper magnetic core 100 and the lower magnetic core 200 are integrally formed soft magnetic ferrite structures, i.e., the upper cover 110, the upper surrounding barrier 120 and the upper vertical column 130 are integrally formed soft magnetic ferrite structures, and the lower cover 210, the lower surrounding barrier 220 and the lower vertical column 230 are integrally formed soft magnetic ferrite structures, which can effectively reduce magnetic leakage. Soft magnetic ferrite is a ferromagnetic oxide mainly composed of ferrous oxide, which is a kind of magnetic material.

[0049] Specifically, the surfaces of the upper magnetic core 100 and the lower magnetic core 200 are covered with rubber protective layers, and the protective layer structure made of rubber can effectively prolong the service life of the upper magnetic core 100 and the lower magnetic core 200, thereby effectively ensuring the overall working performance of the patch inductor.

[0050] It can be understood that the coil 300 is a coiled flat copper wire, and the coil 300 is wound by the flat copper wire, which can effectively improve the load capacity of the coil 300, thereby realizing the application requirements of large current and high voltage, and the heights of the upper enclosing barrier 120 and the lower enclosing barrier 220 are greater than or equal to the thickness of the flat copper wire, which can effectively ensure the positioning effect of the upper enclosing barrier 120 and the lower enclosing barrier 220 on the coil 300.

[0051] It can be understood that for each conductive pin 310, the conductive pin 310 includes an upper conductive sheet 311, an inclined conductive sheet 312 and a lower conductive sheet 313 connected in sequence, one end of the upper conductive sheet 311 is connected to the corresponding end of the coil 300, the other end of the upper conductive sheet 311 is connected to the top end of the inclined conductive sheet 312, and the bottom end of the inclined conductive sheet 312 is connected to one end of the lower conductive sheet 313. By setting the conductive pin 310 as a Z-shaped structure, the space utilization is effectively improved and the stability of the conductive pin 310 structure is ensured, and the two inclined conductive sheets 312 are respectively clamped in the upper limiting groove 121 and the lower limiting groove 221. The inclined conductive sheet 312 is realized by the upper limiting groove 121 and the lower limiting groove 221 as a jump-out structure to give way, which can effectively improve the reliability of the overall structure.

[0052] It can be understood that the groove wall of the upper limiting groove 121 away from the coil 300 side is provided with an upper curved surface 122 matched with one of the inclined conductive sheets 312, and the upper curved surface 122 partially extends to the groove bottom of the upper limiting groove 121, one of the top ends of the inclined conductive sheets 312 is located in the upper limiting groove 121, and the upper curved surface 122 abuts at the connection between the inclined conductive sheet 312 and the corresponding upper conductive sheet 311; the groove bottom of the lower limiting groove 221 is provided with a lower curved surface 222 matched with the other inclined conductive sheet 312, the lower curved surface 222 extends to the lower cover 210, and the top end of the other inclined conductive sheet 312 is located in the lower limiting groove 221, and the lower curved surface 222 abuts at the connection between the inclined conductive sheet 312 and the corresponding upper conductive sheet 311. By setting the upper curved surface 122 and the lower curved surface 222, the connection between the corresponding inclined conductive sheet 312 and the upper conductive sheet 311 can be tightly abutted, thereby effectively improving the stability of the positioning structure between the two conductive pins 310 and the upper enclosing barrier 120 and the lower enclosing barrier 220, and effectively improving the mechanical strength of the patch inductor.

[0053] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A ruggedized surface mount inductor, comprising: The utility model provides a magnetic core structure, including: Upper magnetic core (100) including upper cover (110), upper enclosure (120) and upper stand (130), upper enclosure (120) and upper stand (130) are connected to the bottom of upper cover (110), upper stand (130) is equipped with the positioning hole (131) of polygonal cross section, upper cover (110) is equipped with positioning groove (111), the top of positioning hole (131) is connected to the groove bottom of positioning groove (111), the bottom of upper enclosure (120) is equipped with upper limit groove (121); Lower magnetic core (200) including lower cover (210), lower enclosure (220) and lower stand (230), lower enclosure (220) and lower stand (230) are connected to the top of lower cover (210), lower stand (230) is prismatic and matches positioning hole (131), lower stand (230) is connected in positioning hole (131), the top of lower stand (230) is equipped with the positioning piece (240) matched with positioning groove (111), positioning piece (240) is clamped and connected in positioning groove (111), the top of lower enclosure (220) is equipped with lower limit groove (221); Coil (300) is around upper stand (130), upper enclosure (120) surrounds the upper four around coil (300), upper cover (110) is located the top surface of coil (300), lower enclosure (220) surrounds the lower four around coil (300), lower cover (210) is located the bottom surface of coil (300), both ends of coil (300) are equipped with conductive pin (310), two conductive pin (310) are clamped in upper limit groove (121) and lower limit groove (221) respectively.

2. A chip inductor of claim 1, wherein Positioning groove (111) is riveting groove, positioning piece (240) is riveting head, and the riveting head is riveted and connected in the riveting groove.

3. A chip inductor of claim 1, wherein Positioning piece (240) is buckle, and positioning groove (111) is clamping groove.

4. The ruggedized surface mount inductor of claim 1, wherein: The surface of lower stand (230) is equipped with annular reinforcing groove (231), and magnetic rubber ring (250) is arranged in reinforcing groove (231).

5. The ruggedized surface mount inductor of claim 1, wherein: Upper magnetic core (100) and lower magnetic core (200) are integrally formed soft magnetic ferrite structure.

6. The ruggedized surface mount inductor of claim 1, wherein: Coil (300) is a coiled flat copper wire, and the height of upper enclosure (120) and lower enclosure (220) is greater than or equal to the thickness of the flat copper wire.

7. The ruggedized surface mount inductor of claim 1, wherein: Conductive pin (310) includes upper conductive sheet (311), inclined conductive sheet (312) and lower conductive sheet (313) connected in sequence, one end of upper conductive sheet (311) is connected to the end of coil (300), the other end of upper conductive sheet (311) is connected to the top end of inclined conductive sheet (312), the bottom end of inclined conductive sheet (312) is connected to one end of lower conductive sheet (313), and two upper conductive sheets (311) are clamped in upper limit groove (121) and lower limit groove (221) respectively.

8. A chip inductor of claim 7, wherein The upper limit slot (121) is provided with a groove wall on the side away from the coil (300), which is matched with the upper curved surface (122) of one of the inclined conductive sheets (312), and the top end of the inclined conductive sheet (312) is located in the upper limit slot (121); the groove bottom of the lower limit slot (221) is matched with the lower curved surface (222) of the other inclined conductive sheet (312), and the top end of the other inclined conductive sheet (312) is located in the lower limit slot (221).

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