Boost inductor

Abstract

A boost inductor relates to the technical field of electronic components and comprises a shell, a containing cavity penetrating through the left side, the right side, the upper side and the lower side is formed in the shell, and an upper cover used for sealing a top opening of the containing cavity is arranged on the shell; the magnetic core is fixedly arranged in the accommodating cavity; the coil is wound on the magnetic core, and the top end face and the bottom end face of the coil are located at the top opening and the bottom opening of the containing cavity respectively; the double-face heat dissipation structure comprises a first heat conduction pad attached to the outer surface of the upper cover and a second heat conduction pad attached to the bottom opening of the containing cavity, and the first heat conduction pad and the second heat conduction pad are in close contact with the top wall and the bottom wall of the outer cavity respectively. By the adoption of the technical scheme, all-directional heat dissipation is achieved through the double-face heat dissipation structure, the problem that one-way heat dissipation is insufficient is effectively solved, and heat dissipation efficiency is improved. Meanwhile, the first heat-conducting pad and the second heat-conducting pad are adopted to replace heat-conducting glue such as resin glue, so that the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic component technology, specifically to a boost inductor. Background Technology

[0002] With the continuous development of electronic devices, boost inductors, as key electronic components, are crucial to the operation of the entire device in terms of performance and reliability.

[0003] In the prior art, there are several solutions to the heat dissipation problem of boost inductors. For example, a disclosed boost inductor includes a housing with a receiving groove and an inductor body. The inductor body includes a magnetic ring and a coil. The magnetic ring is received in the receiving groove and protrudes from the opening of the groove. In this design, heat dissipation parts are provided on the inner wall of the magnetic ring and the receiving groove. These heat dissipation parts contact the inductor body and the housing, and dissipate the heat generated by the inductor body in the extending direction of the housing and the opening direction of the receiving groove. Specifically, the heat dissipation parts are made of resin adhesive, which fills the receiving groove and connects the magnetic ring, the coil, and the housing, and fixes the magnetic ring and the coil.

[0004] However, this design has some obvious drawbacks. First, while transferring the heat generated by the coil to the housing through the heat sink improves heat dissipation, it significantly increases production costs. Second, the resin curing process is time-consuming, which directly affects production efficiency and is not conducive to large-scale production.

[0005] Furthermore, since boost inductors are typically fixed within an external cavity and sealed by filling this cavity with thermally conductive adhesive, the heat generated in this design must pass through the adhesive to dissipate outside the external cavity, resulting in poor heat dissipation. This multi-layered heat transfer method increases thermal resistance and reduces overall heat dissipation efficiency.

[0006] More importantly, existing heat dissipation structures often only consider unidirectional heat dissipation, neglecting the omnidirectional heat that the boost inductor may generate during operation. This unidirectional heat dissipation design cannot effectively handle the heat generated by the inductor under different operating conditions, which may lead to localized overheating and affect the inductor's performance and lifespan. Utility Model Content

[0007] The purpose of this invention is to provide a boost inductor that has advantages such as improved heat dissipation efficiency, reduced production costs, and increased production efficiency.

[0008] The technical solution adopted by this utility model is: a boost inductor, including a housing, which has a receiving cavity extending through the left and right sides and the top and bottom sides. The top of the housing is provided with a top cover for closing the top opening of the receiving cavity, and the bottom opening of the receiving cavity faces the bottom wall of the external cavity.

[0009] The magnetic core is fixedly installed inside the receiving cavity;

[0010] A coil, wound on the magnetic core, has its top and bottom faces located at the top and bottom openings of the receiving cavity, respectively; and

[0011] The double-sided heat dissipation structure includes a first thermal pad that is attached to the outer surface of the upper cover and a second thermal pad that is attached to the bottom opening of the receiving cavity. The first thermal pad and the second thermal pad are in close contact with the top wall and bottom wall of the outer cavity, respectively.

[0012] Optionally, a positioning groove is provided on the outer surface of the top cover, and the first thermal pad is embedded in the positioning groove, with its thickness exceeding the depth of the positioning groove, for interference contact with the external cavity.

[0013] Optionally, the upper cover is provided with a magnetic sheet, the first thermal pad is attached to the magnetic sheet, and the magnetic sheet and the upper surface of the magnetic core form a closed magnetic circuit to achieve adjustment of the direction of the magnetic circuit.

[0014] Optionally, the top surface of the second thermal pad is attached to the bottom end face of the coil, and the edge of the second thermal pad extends to the outside of the bottom opening of the receiving cavity to increase the contact area between the second thermal pad and the external cavity.

[0015] Optionally, the housing is provided with a magnetic core support, which is located in the receiving cavity. The magnetic core support has a magnetic core mounting groove that runs through its left and right sides. The magnetic core is embedded in the magnetic core mounting groove, and the coil is wound around the outer peripheral surface of the magnetic core support.

[0016] Optionally, the left and right side walls of the housing are provided with pin-type fasteners, which include pins and fixing buckles that cooperate with the pins. The housing is provided with slots that cooperate with the fixing buckles, and the fixing buckles are used to close the left and right slots of the magnetic core mounting slot and apply a lateral clamping force to the magnetic core.

[0017] Optionally, the insertion end of the pin is provided with a guide slope, and the fixing buckle is provided with an inclined guide surface adapted to the guide slope;

[0018] When the pin is inserted into the slot, the fixed buckle moves towards the magnetic core through the cooperation of the guide slope and the inclined guide surface, thereby achieving lateral locking of the magnetic core.

[0019] Optionally, the housing includes a first outer shell and a second outer shell that are symmetrically arranged on both sides, and the first outer shell and the second outer shell cooperate to form the receiving cavity;

[0020] The top cover includes a first half cover and a second half cover. The first half cover and the second half cover are respectively provided with a plugging protrusion and a plugging groove. The first half cover and the second half cover are fitted together by the plugging protrusion and the plugging groove to form a detachable closed structure.

[0021] Optionally, the magnetic core support includes a first support disposed on a first housing and a second support disposed on a second housing. The mating surfaces of the first support and the second support are respectively provided with a positioning boss and a positioning groove, and the concentricity of the magnetic core mounting groove is ensured by the cooperation between the positioning boss and the positioning groove.

[0022] Optionally, the number of magnetic cores and coils are both two sets, and the two sets of magnetic cores and coils are symmetrically arranged in the receiving cavity.

[0023] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0024] This application provides a boost inductor, including a housing, a magnetic core, a coil, and a double-sided heat dissipation structure. The double-sided heat dissipation structure includes a first thermally conductive pad adhered to the outer surface of the upper cover and a second thermally conductive pad adhered to the bottom opening of the receiving cavity. The first and second thermally conductive pads are in close contact with the top and bottom walls of the external cavity, respectively. This design achieves omnidirectional heat dissipation through the double-sided heat dissipation structure, effectively solving the problem of insufficient unidirectional heat dissipation and improving heat dissipation efficiency. Simultaneously, using the first and second thermally conductive pads instead of thermally conductive adhesives such as resin glue reduces production costs and improves production efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0027] Figure 2 This is another perspective view of this embodiment;

[0028] Figure 3 This is an exploded view of this embodiment;

[0029] Figure 4 yes Figure 3 Another perspective view;

[0030] Figure 5 This is a schematic diagram illustrating the assembly relationship between the pin-type fastener, the magnetic core, and the housing in this embodiment;

[0031] Figure 6 It is a schematic diagram used to illustrate the fitting relationship between the external cavity and the shell.

[0032] Explanation of reference numerals in the attached drawings: 100, external cavity; 10, shell; 11, first outer shell; 12, second outer shell; 101, receiving cavity; 102, slot; 20, magnetic core; 30, coil; 41, first thermal pad; 42, second thermal pad; 50, top cover; 51, first half cover; 511, insertion protrusion; 52, second half cover; 521, insertion groove; 501, positioning groove; 502, magnetic sheet; 60, magnetic core bracket; 61, first bracket; 611, positioning protrusion; 62, second bracket; 621, positioning groove; 601, magnetic core mounting groove; 70, pin-type fastener; 71, pin; 711, guide slope; 72, fixing buckle; 721, inclined guide surface. Detailed Implementation

[0033] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] This embodiment relates to a boost inductor, see reference... Figures 1-6 The system includes a housing 10, a magnetic core 20, a coil 30, and a double-sided heat dissipation structure. The housing 10 has an internal cavity 101 extending through the left and right sides and the top and bottom sides. The top of the housing 10 has a top cover 50 for sealing the top opening of the cavity 101, and the bottom opening of the cavity 101 faces the bottom wall of the external cavity 100. The magnetic core 20 is fixedly disposed within the cavity 101, and the coil 30 is wound around the magnetic core 20, with its top and bottom ends located at the top and bottom openings of the cavity 101, respectively. The double-sided heat dissipation structure includes a first thermal pad 41 attached to the outer surface of the top cover 50 and a second thermal pad 42 attached to the bottom opening of the cavity 101. The first thermal pad 41 and the second thermal pad 42 are in close contact with the top and bottom walls of the external cavity 100, respectively.

[0037] By setting a first thermal pad 41 and a second thermal pad 42 at the top and bottom of the housing 10 respectively, the heat generated by the operation of the coil 30 can be directly transferred to the top and bottom walls of the external cavity 100 through the first thermal pad 41 and the second thermal pad 42, thereby improving heat dissipation efficiency, avoiding the use of thermal conductive adhesive, reducing production costs, and improving production efficiency.

[0038] Furthermore, a positioning groove 501 is provided on the outer surface of the top cover 50, and the first thermal pad 41 is embedded in the positioning groove 501, and its thickness exceeds the depth of the positioning groove 501, for interference contact with the external cavity 100.

[0039] By creating a positioning groove 501 on the outer surface of the top cover 50, the first thermal pad 41 can be stably fixed to the outer surface of the top cover 50, avoiding potential displacement issues during use. Furthermore, the thickness of the first thermal pad 41 exceeds the depth of the positioning groove 501, meaning that during installation, the thermal pad will slightly protrude from the surface of the positioning groove 501. This ensures that the first thermal pad 41 forms a tight contact with the external cavity 100, effectively transferring heat away. The positioning groove 501 can be achieved through various processing methods, such as molding or machining. The first thermal pad 41 can be made of materials with high thermal conductivity, such as thermally conductive silicone or thermal pad sheets, to ensure good thermal conductivity.

[0040] Furthermore, a magnetic sheet 502 is provided inside the upper cover 50, and the first thermal pad 41 is attached to the magnetic sheet 502. The magnetic sheet 502 and the upper surface of the magnetic core 20 form a closed magnetic circuit to achieve adjustment of the direction of the magnetic circuit.

[0041] Understandably, by adding a magnetic sheet 502 to the upper cover 50, the magnetic circuit distribution direction of the magnetic core 20 is changed, thereby increasing the mutual inductance coefficient and optimizing the closed magnetic field path. At the same time, it can increase the inductance of the boost inductor. Under the same cross-sectional area of ​​the magnetic core 20 and the number of turns of the coil 30, the increased permeability of the magnetic sheet 502 can increase the inductance.

[0042] The magnetic sheet 502 can be made of materials such as ferrite, silicon steel, or amorphous nanomaterials. This means the material of the magnetic sheet 502 can be changed according to the application scenario; for example, ferrite can be used for high frequencies, and silicon steel for high currents, avoiding cost waste due to a single material. Furthermore, the magnetic sheet 502 can also conduct heat from the coil 30 to the first thermal pad 41 on the upper cover 50, thereby improving heat dissipation efficiency.

[0043] Furthermore, the top surface of the second thermal pad 42 is attached to the bottom end face of the coil 30, and the edge of the second thermal pad 42 extends to the outside of the bottom opening of the receiving cavity 101 to increase the contact area between the second thermal pad 42 and the external cavity 100.

[0044] By ensuring the top surface of the second thermal pad 42 is in contact with the bottom end face of the coil 30, heat can be rapidly transferred to the second thermal pad 42. Since the edge of the second thermal pad 42 extends to the outside of the bottom opening of the receiving cavity 101, the contact area between the second thermal pad 42 and the external cavity 100 is increased, thereby improving heat dissipation efficiency. Specifically, the second thermal pad 42 not only has close contact with the coil 30, but also contacts more of the surface of the external cavity 100 through its extended portion, which can more effectively transfer heat to the external cavity 100, further enhancing the heat dissipation effect.

[0045] Furthermore, a magnetic core support 60 is provided inside the housing 10. The magnetic core support 60 is located in the receiving cavity 101. A magnetic core mounting groove 601 is opened inside the magnetic core support 60, which runs through its left and right sides. The magnetic core 20 is embedded in the magnetic core mounting groove 601, and the coil 30 is wound around the outer peripheral surface of the magnetic core support 60.

[0046] By providing a core support 60 within the housing 10, the core support 60 is located in the receiving cavity 101. The core support 60 has core mounting slots 601 extending through its left and right sides. The core 20 is embedded in the mounting slots, and the coil 30 is wound around the outer peripheral surface of the core support 60. This design makes the installation of the core 20 and coil 30 more stable, ensuring that their positions do not shift during operation, thus improving the inductor's performance and reliability.

[0047] Specifically, the magnetic core support 60 can be made of high-strength insulating material, which ensures the stability of the magnetic core 20 and coil 30 without affecting the electrical performance of the inductor. The design of the magnetic core mounting slot 601 can be customized according to the shape and size of the magnetic core 20 to ensure that the magnetic core 20 can be tightly embedded in the mounting slot and will not shift during operation. The coil 30 is wound on the outer peripheral surface of the magnetic core support 60 and can be wound using an automatic winding machine to improve production efficiency and winding accuracy.

[0048] Furthermore, the left and right side walls of the housing 10 are provided with pin-type fasteners 70. The pin-type fasteners 70 include pins 71 and fixing buckles 72 that cooperate with pins 71. The housing 10 is provided with slots 102 that cooperate with fixing buckles 72. The fixing buckles 72 are used to close the left and right slots of the magnetic core mounting slot 601 and apply a lateral clamping force to the magnetic core 20.

[0049] Through the above technical solution, this application achieves reliable fixation of the magnetic core 20, preventing displacement or loosening of the magnetic core 20 due to external forces during use. Compared with the prior art, the solution of this application is simpler in structure, easier to install and disassemble, and effectively improves the fixation effect and overall stability of the magnetic core 20. Therefore, this application not only improves the reliability and service life of the boost inductor but also simplifies the manufacturing process and installation procedure.

[0050] Furthermore, the insertion end of the pin 71 is provided with a guide slope 711, and the fixing buckle 72 is provided with an inclined guide surface 721 adapted to the guide slope 711; when the pin 71 is inserted into the slot 102, the fixing buckle 72 is driven to move towards the magnetic core 20 through the cooperation of the guide slope 711 and the inclined guide surface 721, thereby achieving the lateral locking of the magnetic core 20.

[0051] By providing a guide slope 711 at the insertion end of the pin 71 and an inclined guide surface 721 adapted to the guide slope 711 on the fixing buckle 72, when the pin 71 is inserted into the slot 102, the cooperation of the guide slope 711 and the inclined guide surface 721 drives the fixing buckle 72 to move towards the magnetic core 20, thereby achieving lateral locking of the magnetic core 20. This design ensures greater stability of the magnetic core 20 during installation, prevents the magnetic core 20 from becoming loose during use, and improves the operational reliability of the inductor.

[0052] In addition, the pin 71 in this application can also reduce production costs and improve the accuracy of inductance testing.

[0053] Specifically, in the prior art, when measuring the inductance of a boost inductor, an aluminum fixture is usually used to clamp and fix the magnetic core 20. This aluminum fixture increases production costs and also affects the measurement of the boost inductor's inductance, resulting in inaccurate measurement data that needs to be converted before use (the measured inductance minus the inductance of the aluminum fixture is the actual inductance of the boost inductor). This makes the inductance measurement inaccurate and introduces a large error. In contrast, the pin 71 in this application is made of plastic, which has a lower production cost and does not interfere with the measurement of the boost inductor's inductance. This allows the measured inductance of the boost inductor to be the actual inductance of the boost inductor, thus improving the accuracy of the inductance measurement.

[0054] Furthermore, the housing 10 includes a first outer shell 11 and a second outer shell 12 that are symmetrically arranged on both sides. The first outer shell 11 and the second outer shell 12 cooperate to form a receiving cavity 101. The upper cover 50 includes a first half cover 51 and a second half cover 52. The first half cover 51 and the second half cover 52 are respectively provided with a plugging protrusion 511 and a plugging groove 521. The first half cover 51 and the second half cover 52 fit together with each other through the plugging protrusion 511 and the plugging groove 521 to form a detachable closed structure.

[0055] By designing the housing 10 into two symmetrical parts and achieving a detachable and enclosed structure for the top cover 50 through the interlocking of the insertion protrusion 511 and insertion groove 521, the problems of complex structural design and difficult disassembly and assembly in traditional boost inductors are solved. Specifically, the symmetrical design of the first housing 11 and the second housing 12 simplifies production and assembly, reducing manufacturing costs. Simultaneously, the detachable design of the top cover 50 facilitates maintenance and replacement of internal components, improving product lifespan and reliability.

[0056] Furthermore, the magnetic core support 60 includes a first support 61 disposed on the first housing 11 and a second support 62 disposed on the second housing 12. The mating surfaces of the first support 61 and the second support 62 are respectively provided with a positioning boss 611 and a positioning groove 621. The concentricity of the magnetic core mounting groove 601 is ensured by the cooperation between the positioning boss 611 and the positioning groove 621.

[0057] The design of the magnetic core support 60 ensures the concentricity of the magnetic core mounting slot 601, contributing to the stability and accuracy of coil 30 winding. The cooperation of the positioning boss 611 and the positioning groove 621 allows the first support 61 and the second support 62 to accurately align, thereby ensuring the stability and consistency of the overall structure. This design provides convenience during installation and disassembly, reducing the risk of damage to the magnetic core 20 and coil 30.

[0058] Specifically, the positioning boss 611 can be designed as a square column or other geometric shape to facilitate a tight fit with the positioning groove 621. The depth and shape of the positioning groove 621 should match the positioning boss 611 to ensure accuracy and stability during docking. This design effectively avoids the problem of misalignment between the magnetic core 20 and the coil 30 due to assembly errors, thereby improving the performance and reliability of the boost inductor.

[0059] Furthermore, there are two sets of magnetic cores 20 and two sets of coils 30, which are symmetrically arranged in the receiving cavity 101.

[0060] By employing a symmetrical structure with two sets of magnetic cores 20 and coils 30, the operating efficiency and performance of the boost inductor can be effectively improved. Specifically, the arrangement of two sets of magnetic cores 20 and coils 30 allows for a more uniform distribution of magnetic flux during operation, reducing localized overheating and improving overall heat dissipation. Furthermore, the symmetrical structure also enables the inductor to have better electromagnetic compatibility and reduce electromagnetic interference during high-frequency operation.

[0061] In other embodiments, the number of magnetic cores 20 and coils 30 may be increased or decreased accordingly depending on the actual situation, and no further limitations are made here.

[0062] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A boost inductor, characterized in that, include: The housing (10) has an internal cavity (101) that extends through the left and right sides and the top and bottom sides. The top of the housing (10) is provided with a cover (50) for closing the top opening of the cavity (101). The bottom opening of the cavity (101) faces the bottom wall of the external cavity (100). The magnetic core (20) is fixedly disposed in the receiving cavity (101); A coil (30) is wound on the magnetic core (20), with its top and bottom ends located at the top and bottom openings of the receiving cavity (101), respectively; and The double-sided heat dissipation structure includes a first thermal pad (41) attached to the outer surface of the top cover (50) and a second thermal pad (42) attached to the bottom opening of the receiving cavity (101). The first thermal pad (41) and the second thermal pad (42) are in close contact with the top wall and bottom wall of the external cavity (100), respectively.

2. The boost inductor according to claim 1, characterized in that, The outer surface of the top cover (50) is provided with a positioning groove (501), the first heat-conducting pad (41) is embedded in the positioning groove (501), and its thickness exceeds the depth of the positioning groove (501) for interference contact with the external cavity (100).

3. A boost inductor according to claim 2, characterized in that, The upper cover (50) is provided with a magnetic sheet (502), the first heat-conducting pad (41) is attached to the magnetic sheet (502), and the magnetic sheet (502) and the upper surface of the magnetic core (20) form a closed magnetic circuit to achieve adjustment of the direction of the magnetic circuit.

4. A boost inductor according to claim 1, characterized in that, The top surface of the second thermal pad (42) is in contact with the bottom end face of the coil (30), and the edge of the second thermal pad (42) extends to the outside of the bottom opening of the receiving cavity (101) to increase the contact area between the second thermal pad (42) and the external cavity (100).

5. A boost inductor according to claim 1, characterized in that, The housing (10) is provided with a magnetic core support (60), which is located in the receiving cavity (101). The magnetic core support (60) has a magnetic core mounting groove (601) that runs through its left and right sides. The magnetic core (20) is embedded in the magnetic core mounting groove (601), and the coil (30) is wound around the outer peripheral surface of the magnetic core support (60).

6. A boost inductor according to claim 5, characterized in that, The left and right side walls of the housing (10) are provided with pin-type fasteners (70), the pin-type fasteners (70) include pins (71) and fasteners (72) that cooperate with pins (71). The housing (10) is provided with slots (102) that cooperate with fasteners (72), and fasteners (72) are used to close the left and right slots of the magnetic core mounting slot (601) and apply a lateral clamping force to the magnetic core (20).

7. A boost inductor according to claim 6, characterized in that, The insertion end of the pin (71) is provided with a guide slope (711), and the fixing buckle (72) is provided with an inclined guide surface (721) adapted to the guide slope (711); When the pin (71) is inserted into the slot (102), the fixed buckle (72) is driven to move towards the magnetic core (20) by the cooperation of the guide slope (711) and the inclined guide surface (721), thereby achieving the lateral locking of the magnetic core (20).

8. A boost inductor according to claim 5, characterized in that, The housing (10) includes a first outer shell (11) and a second outer shell (12) that are symmetrically arranged on both sides, and the first outer shell (11) and the second outer shell (12) cooperate to form the receiving cavity (101); The upper cover (50) includes a first half cover (51) and a second half cover (52). The first half cover (51) and the second half cover (52) are respectively provided with a plugging protrusion (511) and a plugging groove (521). The first half cover (51) and the second half cover (52) are fitted together by the plugging protrusion (511) and the plugging groove (521) to form a detachable closed structure.

9. A boost inductor according to claim 8, characterized in that, The magnetic core support (60) includes a first support (61) disposed on the first outer shell (11) and a second support (62) disposed on the second outer shell (12). The mating surfaces of the first support (61) and the second support (62) are respectively provided with a positioning boss (611) and a positioning groove (621). The concentricity of the magnetic core mounting groove (601) is ensured by the cooperation between the positioning boss (611) and the positioning groove (621).

10. A boost inductor according to claim 1, characterized in that, The number of magnetic cores (20) and coils (30) are both two sets, and the two sets of magnetic cores (20) and coils (30) are symmetrically arranged in the receiving cavity (101).

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