Sealed magnetic shielding inductor

Abstract

The utility model discloses a sealed magnetic shielding inductor which comprises a resin base, a shielding cover is arranged outside the resin base, an I-shaped magnetic core fixed to the upper end face of the resin base is installed in the center of the interior of the shielding cover, and a winding set is arranged on the cylinder portion of the I-shaped magnetic core. The four positioning assemblies are annularly distributed on the outer side of the magnetic core, each positioning assembly is composed of a fixed frame and a movable frame, a plurality of semicircular grooves distributed at equal intervals are formed in the outer side of each fixed frame and the inner side of each movable frame, insertion holes are formed in the positions, located in the adjacent semicircular grooves, of the fixed frames, and the insertion holes are inserted into the semicircular grooves. Positioning blocks matched with the inserting holes in an inserting manner are arranged at the positions, adjacent to the semicircular grooves, of the inner side of the movable frame; and the semicircular grooves of the fixed frame and the movable frame are combined to form circular mounting holes, and the plurality of mounting holes are used for mounting the winding group, so that the problems that the disassembly and assembly structure of the shielding cover and the inductor is inconvenient and the coil is easy to displace or deform in the working process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a sealed magnetic shielding inductor. Background Art

[0002] A magnetically shielded inductor is an inductor component with a magnetic shielding structure. Its main function is to reduce the impact of the external magnetic field on the inductor current to ensure the stability and accuracy of the circuit. This type of inductor is usually composed of magnetic material, a coil, and a possible shell, where the coil is wrapped in a magnetic material to form a protective shield. When current passes through the inductor, a magnetic field is generated in the coil, and the magnetic material absorbs part of the magnetic field, thereby reducing the impact of magnetic field interference on the device. Therefore, magnetically shielded inductors play an important role in the suppression of electromagnetic interference (EMI) in electronic equipment.

[0003] For example, the Chinese authorized patent "A Sealed Magnetic Shielded Inductor" with announcement number CN215007886U includes an inductor body and a magnetic shielding cover. The magnetic shielding cover includes a protective cover and a base plate. The inductor body is installed in the protective cover and the base plate. A support foot is provided at the bottom of the inductor body, and the support foot passes through the base plate. A connecting block is provided at the edge of the upper surface of the base plate, and a mounting groove is provided on the side of the connecting block. A mounting block is provided in the mounting groove, and the mounting block is fixed in the mounting groove by a spring. A connecting groove is provided at the bottom edge of the protective cover at a position corresponding to the connecting block, and a snap-fitting groove is provided at a position corresponding to the mounting block.

[0004] Although the above-mentioned prior art can realize the combined assembly and disassembly of the shielding cover and the inductor, the installation structure is relatively complicated and the firmness cannot be guaranteed. In addition, due to the influence of vibration, the coil is prone to displacement or deformation during operation, and the stability and consistency of the inductor structure cannot be maintained, thereby causing electromagnetic interference and energy loss. Therefore, it does not meet the existing needs. In this regard, we propose a sealed magnetic shielding inductor. Utility Model Content

[0005] The utility model aims to provide a sealed magnetic shielding inductor to solve the problems in the background art that the shielding cover and the inductor are inconvenient to disassemble and assemble and the coil is prone to displacement or deformation during operation.

[0006] To achieve the above object, the utility model provides the following technical solutions: a sealed magnetic shielded inductor, comprising a resin base, a shielding cover is arranged outside the resin base, an I-shaped magnetic core fixed to the upper end surface of the resin base is installed at the center of the shielding cover, and a winding group is arranged at the column part of the I-shaped magnetic core; and further comprising:

[0007] Four positioning components are distributed in an annular shape on the outside of the magnetic core, and the positioning component is composed of a fixed frame and a movable frame. The outside of the fixed frame and the inside of the movable frame are provided with a plurality of equally spaced semicircular grooves, and the fixed frame is provided with a plug hole at the position of the adjacent semicircular groove, and the inside of the movable frame is provided with a positioning block plugged with the plug hole at the position of the adjacent semicircular groove, and a threaded hole is provided inside the plug hole, and a second fastening screw is provided at the position of the outer side of the movable frame corresponding to the positioning block, and the second fastening screw passes through the movable frame, the positioning block and the plug hole and is connected with the threaded hole;

[0008] The semicircular grooves of the fixed frame and the movable frame are combined to form a circular mounting hole, and the plurality of mounting holes are used for mounting the winding set.

[0009] Preferably, an annular groove is provided on the top plate and the bottom plate of the magnetic core, and there are two annular grooves, one connected to the outside of the top plate and the bottom plate of the magnetic core, and the other is located inside the top plate and the bottom plate of the magnetic core, and the two annular grooves are connected, and the upper and lower end surfaces of the fixed frame are fixedly provided with sliders, one end of the slider is slidably connected to the magnetic core, and the other end of the slider is located in the annular groove inside the top plate and the bottom plate of the magnetic core, and slidably cooperates with it, and the annular grooves outside the top plate and the bottom plate of the magnetic core are installed with first fastening screws with the same number and corresponding positions as the sliders, and the first fastening screws are connected to the inner screw holes of the sliders.

[0010] Preferably, a fixing seat is provided on the outer edge of the upper end surface of the resin base, an annular threaded groove communicating with the outside is provided inside the fixing seat, a threaded mounting ring is installed at the bottom of the shielding cover, and the threaded mounting ring is adapted to the annular threaded groove.

[0011] Preferably, an annular placement groove is provided below the inside of the annular thread groove, a sliding limit plug is installed inside the placement groove, and the outer side of the upper end face of the plug is inclined, and a pull rod extending to the outside of the fixed seat is fixedly installed at the outer end of the plug, an extension rod is provided at the middle position of the pull rod, and the extension rod is located in the cavity inside the fixed seat, a spring is fixedly installed between the cavity and the extension rod of the pull rod, and an annular slot is provided at the lower end of the outer wall of the threaded mounting ring, and the slot is plug-in-matched with the plug.

[0012] Preferably, a rubber pad is adhesively fixed to the bottom of the annular thread groove.

[0013] Preferably, one end of the pull rod located outside the fixing seat is in an L-shaped structure.

[0014] Preferably, the outer wall of the shielding cover is provided with a shielding composite coating, and the shielding composite coating comprises a base layer, a conductive layer and an insulating layer from the inside to the outside.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model sets four annularly distributed positioning components on the outside of the magnetic core. During the production process of the inductor, the winding group is wound around the outside of the magnetic core along the notch of the fixed frame, and then the positioning block on the inner side of the movable frame is aligned with the insertion hole on the outer side of the fixed frame to form the positioning of the fixed frame and the movable frame. At this time, the movable frame cooperates with the fixed frame to wrap part of the coil using the arc groove, and then the second fastening screw is inserted into the movable frame, and after passing through the positioning block, it enters the screw hole in the insertion hole in a spiral manner to form the fixation of the fixed frame and the movable frame. At this time, not only can the winding group be supported, but also the upper and lower coils can be fixed to ensure that the spacing between the coils is stable and consistent, avoiding displacement or deformation of the coil during operation, maintaining the stability and consistency of the inductor structure, and the stable coil spacing helps to reduce electromagnetic interference and energy loss, and improve the efficiency of the inductor.

[0017] 2. The utility model adopts a flexible installation structure for the resin base and the shielding cover. The threaded installation ring at the bottom of the shielding cover is preferably aligned with the annular opening of the fixing seat, and continuously enters the interior of the fixing seat in a spiral rotation manner. When the bottom of the threaded installation ring contacts the plug-in block, its inclined surface converts vertical movement into horizontal movement, and gradually extends to the storage groove in the fixing seat. When the threaded installation ring is rotated to the bottom, the slot on its side corresponds to the plug-in block, providing a movable space for the plug-in block, and at the same time, with the reset effect of the spring, the plug-in block extends to the inside of the slot, making the threaded installation ring unable to rotate, thereby forming a firm installation of the shielding cover and the resin base. When disassembling, only the pull rod needs to be pulled outward to move the plug-in block out of the inside of the slot, and the two can be separated by rotating the shielding cover. The structure is convenient and easy to operate, and both installation firmness and flexibility can be guaranteed.

[0018] 3. The utility model provides a shielding composite coating on the outer wall of the shielding cover, and its conductive layer can absorb and disperse the magnetic field, significantly enhancing the magnetic shielding effect of the magnetic shielding cover. The provision of the insulating layer prevents the direct contact between the conductive layer and the outside world, avoiding potential electrical safety hazards. The multi-layer composite coating can comprehensively utilize the advantages of each layer of material to achieve overall optimization of the performance of the magnetic shielding cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 2 This is a top view of the magnetic core of the utility model after removing the top plate;

[0021] Figure 3 It is a top view of the magnetic core of the utility model;

[0022] Figure 4 It is a three-dimensional diagram of the positioning component of the utility model;

[0023] Figure 5 This is an exploded view of the positioning component of the utility model;

[0024] Figure 6 For the utility model Figure 1 A partial enlarged view of the middle A area;

[0025] Figure 7 For the utility model Figure 1 A partial enlarged view of area B in the middle.

[0026] In the figure: 1. resin base; 2. magnetic core; 3. shielding cover; 4. shielding composite coating; 5. positioning assembly; 6. winding group; 7. fixing frame; 8. movable frame; 9. slider; 10. annular slide groove; 11. first fastening screw; 12. second fastening screw; 13. jack; 14. threaded mounting ring; 15. slot; 16. fixing seat; 17. rubber pad; 18. pull rod; 19. plug block; 20. spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] See also Figure 1-7 The utility model provides an embodiment: a sealed magnetic shielding inductor, comprising a resin base 1, a shielding cover 3 is arranged outside the resin base 1, an I-shaped magnetic core 2 fixed to the upper end surface of the resin base 1 is installed at the center of the shielding cover 3, and a winding group 6 is arranged at the column part of the I-shaped magnetic core 2; and also includes:

[0029] Four positioning components 5 are distributed in an annular shape on the outside of the magnetic core 2. The positioning component 5 consists of a fixed frame 7 and a movable frame 8. The outer side of the fixed frame 7 and the inner side of the movable frame 8 are provided with a plurality of equally spaced semicircular grooves. The fixed frame 7 is provided with a plug hole 13 at the position of the adjacent semicircular groove. The inner side of the movable frame 8 is provided with a positioning block plugged with the plug hole 13 at the position of the adjacent semicircular groove. At the same time, a threaded hole is provided inside the plug hole 13. A second fastening screw 12 is provided at the position of the outer side of the movable frame 8 corresponding to the positioning block. The second fastening screw 12 passes through the movable frame 8, the positioning block and the plug hole 13 and is connected to the threaded hole.

[0030] The semicircular grooves of the fixed frame 7 and the movable frame 8 are combined to form a circular mounting hole, and the multiple mounting holes are used for mounting the winding set 6.

[0031] When in use, during the production of the inductor, the winding group 6 is wound around the outside of the magnetic core 2 along the notch of the fixed frame 7, and then the positioning block on the inner side of the movable frame 8 is aligned with the socket 13 on the outer side of the fixed frame 7, so that the fixed frame 7 and the movable frame 8 are positioned. At this time, the movable frame 8 cooperates with the fixed frame 7 to wrap part of the coil using the arc groove, and then the second fastening screw 12 is inserted into the movable frame 8, and after passing through the positioning block, it enters the screw hole in the socket 13 in a spiral manner, so that the fixed frame 7 and the movable frame 8 are fixed. At this time, not only can the winding group 6 be supported, but also the upper and lower coils can be fixedly spaced to ensure that the spacing between the coils is stable and consistent.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 , an annular slide groove 10 is provided on the top plate and the bottom plate of the magnetic core 2, and there are two annular slide grooves 10, one of which is connected to the outside of the top plate and the bottom plate of the magnetic core 2, and the other is located inside the top plate and the bottom plate of the magnetic core 2, and the two annular slide grooves 10 are connected, and the upper and lower end surfaces of the fixing frame 7 are fixedly provided with a slider 9, one end of the slider 9 is slidably connected to the magnetic core 2, and the other end of the slider 9 is located in the annular slide groove 10 inside the top plate and the bottom plate of the magnetic core 2, and slidably cooperates with it, and the annular slide groove 10 outside the top plate and the bottom plate of the magnetic core 2 is installed with a first fastening screw 11 of the same number and corresponding position as the slider 9, and the first fastening screw 11 is connected to the inner screw hole of the slider 9, and when the first fastening screw 11 is located in the slider 9 and fixed, the fixing frame 7 can move freely in the annular slide groove 10, thereby correspondingly adjusting the spacing of the coils of the winding group 6, and rotating the first fastening screw 11 after adjustment to achieve the firmness of the positioning component 5 at this position, providing a prerequisite for maintaining the stability and consistency of the inductor structure.

[0033] See also Figure 1 and Figure 7 A fixing seat 16 is provided on the outer edge of the upper end surface of the resin base 1, and an annular threaded groove connected to the outside is provided inside the fixing seat 16. A threaded mounting ring 14 is installed at the bottom of the shielding cover 3, and the threaded mounting ring 14 is adapted to the annular threaded groove. The shielding cover 3 can be fixed to the resin base 1 by rotating it.

[0034] See also Figure 7A placement groove with an annular distribution is provided at the lower part of the annular thread groove, a sliding limit plug 19 is installed inside the placement groove, and the outer side of the upper end surface of the plug 19 is inclined. A pull rod 18 extending to the outside of the fixed seat 16 is fixedly installed at the outer end of the plug 19, and an extension rod is provided at the middle position of the pull rod 18, and the extension rod is located in the cavity inside the fixed seat 16. A spring 20 is fixedly installed between the cavity and the extension rod of the pull rod 18. A slot 15 with an annular distribution is provided at the lower end of the outer wall of the threaded mounting ring 14, and the slot 15 is plugged with the plug 19. When the bottom of the threaded mounting ring When in contact with the plug block 19, its inclined surface converts vertical movement into horizontal movement and gradually extends to the storage groove in the fixing seat 16. When the threaded mounting ring rotates to the bottom, the slot 15 on its side corresponds to the plug block 19, providing a movable space for the plug block 19. At the same time, with the reset effect of the spring 20, the plug block 19 extends to the inside of the slot 15, making the threaded mounting ring unable to rotate, thereby forming a firm installation of the shielding cover 3 and the resin base 1. When disassembling, just pull the pull rod 18 outward to move the plug block 19 out of the inside of the slot 15, and then rotate the shielding cover 3 to separate the two.

[0035] See also Figure 7 A rubber pad 17 is bonded and fixed to the bottom of the annular thread groove.

[0036] See also Figure 1 and Figure 7 One end of the pull rod 18 located outside the fixing seat 16 is in an L-shaped structure.

[0037] See also Figure 1 The outer wall of the shielding cover 3 is provided with a shielding composite coating 4, which includes a base layer, a conductive layer and an insulating layer from the inside to the outside. The base layer is epoxy resin, which has good adhesion and corrosion resistance. It is tightly attached to the outer wall of the magnetic shielding cover to provide stable support for subsequent coatings; the conductive layer is conductive carbon black, which forms a conductive network, effectively absorbs and disperses the magnetic field, and enhances the magnetic shielding effect; the insulating layer is ceramic, which prevents the conductive layer from direct contact with the outside world, ensuring the safety and stability of the coating.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A sealed magnetic shielded inductor, comprising a resin base (1), a shielding cover (3) is arranged outside the resin base (1), an I-shaped magnetic core (2) fixed to the upper end surface of the resin base (1) is installed at the center of the inside of the shielding cover (3), and a winding group (6) is arranged at the column part of the I-shaped magnetic core (2); Features: Also includes: Four positioning components (5) are distributed in an annular shape on the outer side of the magnetic core (2); the positioning component (5) is composed of a fixed frame (7) and a movable frame (8); the outer side of the fixed frame (7) and the inner side of the movable frame (8) are provided with a plurality of semicircular grooves distributed at equal intervals; the fixed frame (7) is provided with a plug hole (13) at a position adjacent to the semicircular groove; the inner side of the movable frame (8) is provided with a positioning block plugged with the plug hole (13) at a position adjacent to the semicircular groove; a threaded hole is provided inside the plug hole (13); a second fastening screw (12) is provided at a position corresponding to the positioning block on the outer side of the movable frame (8); the second fastening screw (12) passes through the movable frame (8), the positioning block and the plug hole (13) and is connected to the threaded hole; The semicircular grooves of the fixed frame (7) and the movable frame (8) are combined to form a circular mounting hole, and the plurality of mounting holes are used for mounting the winding group (6).

2. A sealed magnetic shielded inductor according to claim 1, characterized in that: The top plate and the bottom plate of the magnetic core (2) are both provided with an annular groove (10), and two annular grooves (10) are provided, one of which is connected to the outside of the top plate and the bottom plate of the magnetic core (2), and the other is located inside the top plate and the bottom plate of the magnetic core (2), and the two annular grooves (10) are connected. The upper and lower end surfaces of the fixing frame (7) are both fixedly provided with sliders (9), one end of the slider (9) is slidably connected to the magnetic core (2), and the other end of the slider (9) is located in the annular groove (10) inside the top plate and the bottom plate of the magnetic core (2) and slidably cooperates with it. The annular grooves (10) outside the top plate and the bottom plate of the magnetic core (2) are both installed with first fastening screws (11) of the same number and corresponding position as the sliders (9), and the first fastening screws (11) are connected to the inner screw holes of the sliders (9).

3. The sealed magnetic shielded inductor according to claim 1, characterized in that: A fixing seat (16) is provided at the outer edge of the upper end surface of the resin base (1), and an annular threaded groove communicating with the outside is provided inside the fixing seat (16). A threaded mounting ring (14) is installed at the bottom of the shielding cover (3), and the threaded mounting ring (14) is adapted to the annular threaded groove.

4. The sealed magnetic shielded inductor according to claim 3, characterized in that: An annular placement groove is provided below the inside of the annular thread groove, a sliding limit plug (19) is installed inside the placement groove, and the outer side of the upper end surface of the plug (19) is inclined. A pull rod (18) extending to the outside of the fixed seat (16) is fixedly installed at the outer end of the plug (19), an extension rod is provided at the middle position of the pull rod (18), and the extension rod is located in the cavity inside the fixed seat (16), and a spring (20) is fixedly installed between the cavity and the extension rod of the pull rod (18), and an annular slot (15) is provided at the lower end of the outer wall of the threaded mounting ring (14), and the slot (15) is plugged into and matched with the plug (19).

5. The sealed magnetic shielded inductor according to claim 3, characterized in that: A rubber pad (17) is bonded and fixed to the bottom of the annular thread groove.

6. The sealed magnetic shielded inductor according to claim 4, characterized in that: One end of the pull rod (18) located outside the fixing seat (16) is in an L-shaped structure.

7. The sealed magnetic shielded inductor according to claim 1, characterized in that: The outer wall of the shielding cover (3) is provided with a shielding composite coating (4), and the shielding composite coating (4) comprises, from the inside to the outside, a base layer, a conductive layer and an insulating layer.

Images