Multilayer metal coil inductor

Abstract

The utility model belongs to the technical field of inductor manufacturing, and particularly relates to a multilayer metal coil inductor which comprises an outer shell, a magnetic core and a coil, the magnetic core and the coil are arranged in the outer shell, the coil is arranged on the periphery of the magnetic core, and the outer shell comprises a lower shell body and an upper shell body. The lower shell body and the upper shell body are connected in an involution mode to form an installation cavity to contain a coil and a magnetic core, and the upper surface and the lower surface of the outer shell are each provided with a plurality of heat dissipation areas which are arranged in an annular array mode. The upper surface and the lower surface of the shell of the inductor are provided with a plurality of heat dissipation areas, the heat dissipation of the inductor is facilitated, and the heat dissipation areas are arranged in an annular array, so that the shell is ensured to provide support and protection for the coil and the magnetic core, and air circulation is also facilitated for heat dissipation.

Description

Technical Field

[0001] The utility model belongs to the technical field of inductor manufacturing, and in particular relates to a multi-layer metal coil inductor. Background Art

[0002] Coil inductors are commonly used in electrical applications and can be divided into radio frequency (RF) inductors for signal processing and power inductors for power lines. In RF inductor applications, coil inductors can be used to choke, block, attenuate or filter / smooth high-frequency noise in the circuit. In power inductor applications, power inductors form part of the voltage conversion circuit in a DC-DC converter or other device. For example, power inductors are used in boost, buck or boost / buck circuits to convert a specific voltage to a desired voltage.

[0003] A Chinese patent with application number CN201721379171.5 discloses a multilayer metal coil inductor, including a core support, a core, a coil assembly, an upper packaging shell, a lower packaging shell, a left head, and a right head. The core support is cylindrical with its axis horizontally arranged, and the core is located on the inner side of the core support. The coil assembly includes a plurality of metal coils in a non-closed ring shape, and the plurality of metal coils are spaced apart on the core support, and the two free ends of the metal coils are located below the core support. A protrusion protruding radially inward is provided on the inner side wall of the metal coil, and a groove for accommodating the protrusion is provided on the outer peripheral wall of the core support. The multilayer metal coil inductor of this utility model can withstand strong currents, and this splicing structure is very simple to install, and the inductor can be assembled more efficiently and quickly.

[0004] The above-mentioned multi-layer metal coil inductor will generate a large amount of heat during use, which is not easy to dissipate and has a poor heat dissipation effect. If the inductor does not dissipate heat in time, the inductor is likely to burn out. In addition, the structure of the inductor is complex, and the multi-layer metal coil is connected by a splicing structure. As the number of coils increases, the workload will increase significantly compared to the winding method. For this reason, an improved multi-layer metal coil inductor is designed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a multi-layer metal coil inductor to solve the above-mentioned problems in the background technology.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A multilayer metal coil inductor comprises a shell and a magnetic core and a coil arranged inside the shell, wherein the coil is arranged on the outer periphery of the magnetic core, the shell comprises a lower shell and an upper shell, the lower shell and the upper shell are connected to form an installation cavity to accommodate the coil and the magnetic core, and the upper and lower surfaces of the shell are both provided with a plurality of heat dissipation areas, which are arranged in a ring array.

[0008] By adopting the above structural design, multiple heat dissipation areas are opened on the upper and lower surfaces of the inductor shell to facilitate the heat dissipation of the inductor. Since the heat dissipation areas are arranged in a ring array, it is ensured that the shell can provide support and protection for the coil and the magnetic core while facilitating air circulation for heat dissipation.

[0009] Furthermore, the lower shell includes an outer ring plate and an inner ring plate located inside the outer ring plate, a plurality of connecting plates are connected between the bottom edge of the outer ring plate and the bottom edge of the inner ring plate, the plurality of connecting plates are arranged in a circular array, and the heat dissipation area is formed between adjacent connecting plates, and the coil is arranged on the connecting plate between the outer ring plate and the inner ring plate.

[0010] By adopting the above structural design, the lower shell includes an outer ring plate, an inner ring plate and a connecting plate connecting the outer ring plate and the inner ring plate, wherein the coil is placed on the connecting plate, and a plurality of columns are arranged in an array on the connecting plate, and gaps for accommodating single-turn coils are formed between adjacent columns, thereby isolating the single-turn coils, and further enhancing the heat dissipation effect of the inductor.

[0011] Furthermore, the connection plate is provided with a plurality of columns in an array at intervals along its length direction. The plurality of columns are distributed in two groups on the left and right sides of the connection plate, and gaps for accommodating single-turn coils are formed between adjacent columns.

[0012] Furthermore, a slot for routing the pins of the coil is provided on one side of the inner ring plate close to the outer ring plate.

[0013] Furthermore, a magnetic core seat is arranged inside the inner ring plate, and a heat dissipation hole with a smaller aperture than that of the magnetic core is opened on the magnetic core seat.

[0014] Furthermore, a connection block for connecting the upper and lower shells is arranged outside the outer ring plate, and the upper and lower connection blocks are connected by fasteners.

[0015] Furthermore, the lower shell and the upper shell have the same shell structure and are made of plastic material.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Multiple heat dissipation zones are set up on the upper and lower surfaces of the inductor shell to facilitate heat dissipation of the inductor. Since the heat dissipation zones are arranged in a circular array, the shell can provide support and protection for the coil and the magnetic core while facilitating air circulation for heat dissipation.

[0018] 2. The lower shell includes an outer ring plate, an inner ring plate and a connecting plate connecting the outer ring plate and the inner ring plate, wherein the coil is placed on the connecting plate, and a plurality of columns are arranged in an array on the connecting plate, and gaps for accommodating single-turn coils are formed between adjacent columns, which isolate the single-turn coils and further enhance the heat dissipation effect of the inductor;

[0019] 3. A notch is provided on one side of the inner ring plate close to the outer ring plate to facilitate the wiring of the coil pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional structural schematic diagram of a multi-layer metal coil inductor embodiment of the utility model (viewing angle 1);

[0021] Figure 2 A schematic diagram of the three-dimensional structure of a multilayer metal coil inductor embodiment of the utility model (viewing angle 2);

[0022] Figure 3 It is a three-dimensional structural schematic diagram of a lower housing in an embodiment of a multi-layer metal coil inductor of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of a coil in a multilayer metal coil inductor embodiment of the utility model;

[0024] The reference numerals in the drawings of the specification include:

[0025] Shell (01), heat dissipation area (011), lower shell (1), upper shell (2), coil (3), pin (31),

[0026] An outer ring plate (11), a plug hole (111), an inner ring plate (12), a slot (121), a magnetic core seat (13), a connecting plate (14), a column bar (15), a partition column (16), and a connecting block (17). DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] like Figure 1-4 As shown, the utility model. Specifically, a multilayer metal coil inductor includes a shell 01 and a magnetic core and a coil 3 arranged inside the shell 01, the coil 3 is arranged on the periphery of the magnetic core, the shell 01 includes a lower shell 1 and an upper shell 2, the lower shell 1 and the upper shell 2 are connected to form a mounting cavity to accommodate the coil 3 and the magnetic core, and the upper and lower surfaces of the shell 01 are provided with a plurality of heat dissipation areas 011, and the plurality of heat dissipation areas 011 are arranged in a ring array. A plurality of heat dissipation areas 011 are provided on the upper and lower surfaces of the shell 01 of the inductor to facilitate the heat dissipation of the inductor. Since the heat dissipation areas 011 are arranged in a ring array, it is ensured that the shell 01 can provide support and protection for the coil 3 and the magnetic core, and can also facilitate air circulation for heat dissipation.

[0033] In this example, the lower housing 1 includes an outer ring plate 11 and an inner ring plate 12 located inside the outer ring plate 11, and a plurality of connecting plates 14 are connected between the bottom edge of the outer ring plate 11 and the bottom edge of the inner ring plate 12, and the plurality of connecting plates 14 are arranged in a ring array, and a heat dissipation area 011 is formed between adjacent connecting plates 14, and the coil 3 is arranged on the connecting plate 14 and located between the outer ring plate 11 and the inner ring plate 12. The lower housing 1 includes an outer ring plate 11 and an inner ring plate 12, and a connecting plate 14 connecting the outer ring plate 11 and the inner ring plate 12, wherein the coil 3 is placed on the connecting plate 14, and a plurality of column bars 15 are arranged in an array on the connecting plate 14, and gaps for accommodating single-turn coils are formed between adjacent column bars 15, which isolate the single-turn coils and further enhance the heat dissipation effect of the inductor.

[0034] In this example, a plurality of columns 15 are arranged in an array along the length of the connecting plate 14 . The plurality of columns 15 are distributed in two groups on the left and right sides of the connecting plate 14 , and gaps for accommodating single-turn coils are formed between adjacent columns 15 .

[0035] In this example, an insertion hole 111 is opened on the inner wall of the outer ring plate 11 and the inner ring plate 12 on the side close to each other, and a column bar 15 is inserted into the insertion hole 111. The column bar 15 and the connecting plate 14 are arranged in parallel, so that multiple layers of coils 3 can be accommodated. The specific operation method is to wind the first layer of coils first and then insert the column bar 15 to wind the second layer of coils on the column bar 15.

[0036] In this example, a slot 121 for routing the pins 31 of the coil 3 is provided on one side of the inner ring plate 12 close to the outer ring plate 11 .

[0037] In this example, a magnetic core seat 13 is disposed inside the inner ring plate 12 , and a heat dissipation hole with a smaller diameter than the magnetic core is opened on the magnetic core seat 13 .

[0038] In this example, a connection block 17 for connecting the upper and lower shells is disposed outside the outer ring plate 11, and the upper and lower connection blocks 17 are connected by fasteners. The fasteners are bolts or screws.

[0039] In this example, the lower shell 1 and the upper shell 2 have the same shell structure and are made of plastic material.

[0040] Working principle: Multiple heat dissipation areas 011 are provided on the upper and lower surfaces of the inductor housing 01 to facilitate heat dissipation of the inductor. Since the heat dissipation areas 011 are arranged in a circular array, it is ensured that the housing 01 can provide support and protection for the coil 3 and the magnetic core, and can also facilitate air circulation for heat dissipation. The lower housing 1 includes an outer ring plate 11, an inner ring plate 12, and a connecting plate 14 connecting the outer ring plate 11 and the inner ring plate 12, wherein the coil 3 is placed on the connecting plate 14, and a plurality of columns 15 are arranged in an array on the connecting plate 14, and gaps for accommodating single-turn coils are formed between adjacent columns 15, which isolate the single-turn coils and further enhance the heat dissipation effect of the inductor. An insertion hole 111 is opened on the inner wall of the outer ring plate 11 and the inner ring plate 12 on the side close to each other, and a column bar 15 is inserted into the insertion hole 111. The column bar 15 and the connecting plate 14 are arranged in parallel, so that multiple layers of coils 3 can be accommodated. The specific operation method is to wind the first layer of coils first and then insert the column bar 15 to wind the second layer of coils on the column bar 15.

[0041] The above are only embodiments of the utility model, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the prior art in the field, and have the ability to apply conventional experimental means before the date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A multilayer metal coil inductor, comprising a housing (01) and a magnetic core and a coil (3) arranged inside the housing (01), wherein the coil (3) is arranged on the periphery of the magnetic core, characterized in that: The housing (01) comprises a lower housing (1) and an upper housing (2), wherein the lower housing (1) and the upper housing (2) are coupled to form a mounting cavity for accommodating a coil (3) and a magnetic core, and the upper and lower surfaces of the housing (01) are both provided with a plurality of heat dissipation areas (011), and the plurality of heat dissipation areas (011) are arranged in a ring array.

2. A multilayer metal coil inductor as claimed in claim 1, characterized in that: The lower shell (1) comprises an outer ring plate (11) and an inner ring plate (12) located inside the outer ring plate (11); a plurality of connecting plates (14) are connected between the bottom edge of the outer ring plate (11) and the bottom edge of the inner ring plate (12); the plurality of connecting plates (14) are arranged in a ring array; a heat dissipation area (011) is formed between adjacent connecting plates (14); and the coil (3) is arranged on the connecting plate (14) between the outer ring plate (11) and the inner ring plate (12).

3. A multilayer metal coil inductor as claimed in claim 2, characterized in that: The connection plate (14) is provided with a plurality of column bars (15) arranged in an array along its length direction. The plurality of column bars (15) are divided into two groups and distributed on the left and right sides of the connection plate (14). Gaps for accommodating single-turn coils are formed between adjacent column bars (15).

4. A multilayer metal coil inductor as claimed in claim 2, characterized in that: A notch (121) for routing the pins (31) of the coil (3) is provided on one side of the inner ring plate (12) close to the outer ring plate (11).

5. The multilayer metal coil inductor according to claim 2, characterized in that: A magnetic core seat (13) is arranged inside the inner ring plate (12), and a heat dissipation hole having a smaller aperture than the aperture of the magnetic core is provided on the magnetic core seat (13).

6. A multilayer metal coil inductor as claimed in claim 2, characterized in that: A connecting block (17) for connecting the upper and lower shells is arranged outside the outer ring plate (11), and the upper and lower connecting blocks (17) are connected by fasteners.

7. A multilayer metal coil inductor according to any one of claims 1 to 6, characterized in that: The lower shell (1) and the upper shell (2) have the same shell structure and are made of plastic material.

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