An integrated inductor structure for a flat coil
By designing an asymmetrical pin, composite magnetic core, and uniformly wound flat coil inductor structure, the problems of pin reversal and magnetic leakage were solved, achieving efficient soldering and efficient heat dissipation.
Patent Information
- Application Number
- CN202522392486.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-10
AI Technical Summary
In existing flat coil inductor structures, the uniform pin size makes it easy to insert the pins in reverse during soldering, reducing soldering efficiency and causing poor magnetic leakage and heat dissipation.
An integrated inductor structure with a flat coil was designed, employing an asymmetrical pin design, a composite magnetic core structure, and a uniform winding mechanism. Combined with heat-conducting pillars and limiting blocks, it forms a continuous magnetic circuit and an efficient heat dissipation channel, ensuring proper connection between the pins and PCB pads, reducing magnetic leakage, and increasing inductance.
It effectively prevents pins from being inserted incorrectly, improves soldering efficiency, enhances magnetic field symmetry, reduces magnetic leakage, increases inductance, and achieves efficient heat dissipation through heat-conducting pillars.
Smart Images
Figure CN224934587U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inductor structure technology, specifically an integrated inductor structure with a flat coil. Background Technology
[0002] The flat coil integrated inductor structure is an inductor assembly formed by integrating flat wires with magnetic materials, insulating coatings and other components.
[0003] In existing technologies, inductor components are generally made by winding flat wires around the outside of the frame, welding pins to the two ends of the flat coils, and finally soldering the pins to the corresponding PCB pads to form a stable electrical path to ensure the transmission of signals and power. However, in general inductor structures, the two pins are set to the same size, which can easily lead to reverse insertion when workers manually solder, thus reducing soldering efficiency. Utility Model Content
[0004] The purpose of this invention is to provide an integrated inductor structure for a flat coil to solve the problems in the prior art.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] An integrated inductor structure for a flat coil includes a housing assembly, a frame is provided in the middle of the housing assembly, a coil body is provided on the outside of the frame, and pin assemblies are welded to the upper and lower ends of the coil body.
[0007] Preferably, the outer shell assembly includes an upper shell and a lower shell, with the upper shell positioned above the lower shell, and both the upper and lower shells having the same size.
[0008] Preferably, the lower end of the upper shell is provided with symmetrical locking holes on the left and right sides, and locking pins are engaged inside the locking holes. The locking pins are symmetrically fixedly installed on the upper end of the lower shell.
[0009] Preferably, the middle part of the lower shell is tightly fitted to the lower end of the frame, and the middle part of the lower shell and the lower end of the middle part of the frame are fixedly connected by bolts.
[0010] Preferably, heat-conducting pillars are installed at equal angles on the outside of the skeleton, and four groups of heat-conducting pillars are provided. Each group of heat-conducting pillars has a limiting block vertically arranged on its outside, and the limiting blocks are tightly attached to the coil body between every two groups of limiting blocks in the lateral direction.
[0011] Preferably, the pin assembly includes pin one and pin two. Pin one is located at the lower left end of the coil body, and pin two is located at the lower right end of the coil body. The bottom of pin one is larger than the bottom of pin two, and both pin one and pin two have protrusions at their bottom ends.
[0012] The beneficial effects of this utility model are:
[0013] 1. This utility model sets an asymmetrical mechanism to make the two pins one wide and one narrow. The corresponding PCB pads also need to match the pin settings. This can fundamentally prevent workers from inserting the inductor in the wrong direction when manually soldering the pins. In addition, the pin part is made of composite metal material, which makes the pins not easy to bend and deform. Furthermore, an array of bumps is set at the bottom of the pins, which can increase the contact area and adhesion of the solder when it comes into contact with the PCB pads.
[0014] 2. This utility model sets up a composite magnetic core structure and a magnetic skeleton, so that the skeleton can not only provide support, but also provide a low magnetic resistance path for the inside of the coil. At the same time, the outside of the coil is also covered with a different magnetic material than the inside of the coil. The magnetic materials on the inside and outside of the coil will be integrated into a continuous and complete magnetic circuit, which can effectively improve the inductance and reduce the occurrence of magnetic leakage.
[0015] 3. This utility model sets up a uniform winding mechanism, with multiple limiting blocks vertically arranged outside the heat-conducting pillars on the outer side of the frame. An annular groove is formed between every two sets of limiting blocks. When the coil body is wound, it can be wound along the annular groove, so that the coil can be wound evenly in a spiral shape on the outer side of the frame. The uniform winding of the coil helps to maintain the symmetry of the coil's magnetic field, reduces local magnetic saturation or eddy current loss caused by uneven winding, and can also form interlayer gaps during winding, which facilitates air flow and accelerates the dissipation of heat from the inside of the coil. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] Figure 1 This is a front view schematic diagram of the inductor structure of this utility model;
[0018] Figure 2 This is a bottom view schematic diagram of the inductor structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the inductor structure locking hole, locking pin, and bolt connection structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the connection structure of the inductor frame, coil body and heat-conducting pillar of this utility model;
[0021] Figure 5 This is a schematic diagram of the connection structure of the inductor structure frame, heat-conducting column and limiting block of this utility model.
[0022] The attached figures are labeled as follows:
[0023] 1. Outer shell assembly; 11. Upper shell; 12. Lower shell; 2. Protrusion; 3. Engaging hole; 4. Engaging pin; 5. Bolt; 6. Frame; 7. Coil body; 8. Heat-conducting column; 9. Limiting block; 10. Pin assembly; 101. Pin 1; 102. Pin 2. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0025] To address the problems existing in the prior art, this embodiment provides the following technical solution: an integrated inductor structure with a flat coil. A housing assembly 1 is provided, with a frame 6 located in the middle of the housing assembly 1. Heat-conducting pillars 8 are arranged at equal angles on the outside of the frame 6, located within the inner diameter region of the coil body 7. These pillars are made of metal and contain a large number of freely moving electrons. Simultaneously, the heat-conducting pillars 8 are in contact with a magnetic material, establishing an efficient axial heat dissipation channel in the hottest area inside the coil body 7. Furthermore, a limiting block 9 is provided on the outside of the heat-conducting pillars 8, allowing the coil body 7 to be evenly wound around the outside of the frame 6. Additionally, L-shaped pin assemblies 10 are provided at both ends of the coil body 7, with one end wider than the other narrower to prevent reverse insertion when soldering to the PCB board. The frame 6 and the housing assembly 1 outside the coil body 7 form a continuous and complete magnetic circuit, effectively increasing the inductance of the inductor structure and reducing magnetic leakage.
[0026] like Figures 1-5 As shown, an integrated inductor structure of a flat coil is provided with a housing assembly 1. The housing assembly 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 is disposed on the upper side of the lower housing 12, and the upper housing 11 and the lower housing 12 are the same size.
[0027] The upper shell 11 has symmetrically arranged locking holes 3 on the left and right sides of its lower end. The locking holes 3 are connected to locking pins 4. The locking pins 4 are symmetrically fixed to the upper end of the lower shell 12. At the same time, the middle part of the lower shell 12 is tightly fitted to the lower end of the frame 6. A round hole is opened in the middle of the lower shell 12, and a threaded hole is opened at the lower end of the middle part of the frame 6. Bolts 5 are installed inside the round hole and the threaded hole for fixation.
[0028] The bolt 5 can be unscrewed to pull it out from the middle of the lower shell 12 and the frame 6. At this time, the upper shell 11 can be pulled upward, and the upper shell 11 can be separated from the locked lower shell 12.
[0029] Heat-conducting pillars 8 are provided at equal angles on the outer side of the skeleton 6 inside the outer shell assembly 1. There are four groups of heat-conducting pillars 8. Each group of heat-conducting pillars 8 has a limiting block 9 vertically arranged on its outer side. An annular groove can be formed between every two groups of limiting blocks 9. When the coil body 7 is wound, it can be wound one turn at a time, aligned with the annular groove formed between every two groups of limiting blocks 9.
[0030] The setting of the limiting block 9 can ensure the uniformity of winding when the coil body 7 is wound, and at the same time help the magnetic field of the coil body 7 to be evenly distributed, reducing local magnetic saturation.
[0031] Meanwhile, the coil body 7 will eventually be wound in a spiral shape on the outside of the frame 6, and located outside the heat-conducting pillars 8 set at equal angles on the outside of the frame 6. In addition, the spiral arrangement of the coil body 7 can ensure that the coil body 7 forms interlayer gaps during winding, which facilitates air flow and enhances heat dissipation.
[0032] The magnetic core 6 is located inside the coil body 7, and the outer shell assembly 1 is located on the outside of the coil body 7. The outer shell assembly 1 is also magnetic, but the two use different magnetic materials. The core 6 uses a soft magnetic material, which can enhance the magnetic field and reduce energy damage, while the outer shell assembly 1 uses a hard material to reduce external magnetic field interference. When the core 6 and the outer shell assembly 1 are combined, they form a complete and closed magnetic circuit, which can effectively increase the inductance of the inductor structure, confine the magnetic field inside the magnetic core, reduce magnetic leakage, and play a role in magnetic shielding.
[0033] In addition, the outer shell assembly 1 can not only serve as an outer magnetic core, but also be detachable, which facilitates the winding of the coil body 7 and provides a certain degree of protection for the coil body 7.
[0034] In addition, the inner end of the heat-conducting pillar 8, which is set at an equal angle on the outer side of the frame 6, is in close contact with the frame 6, and the upper and lower ends are in contact with the outer shell assembly 1. At the same time, the lower end of the heat-conducting pillar 8 is flush with the bottom of the outer shell assembly 1 and coplanar with the bottom end of the pin assembly 10, so that the lower end can be directly soldered to the large area copper foil heat sink pre-set on the PCB after the inductor structure is installed.
[0035] The upper end face of the heat-conducting column 8 is in close contact with the inner wall of the outer magnetic shell, which can form upper heat dissipation. The lower end face is flush with the bottom of the inductor structure and can be soldered to the PCB to form lower heat dissipation. The coil body 7 can conduct the heat generated when the coil body 7 is working upward to the shell and downward to the large copper foil heat sink of the PCB circuit board for efficient heat dissipation.
[0036] By setting the heat-conducting pillar 8 within the inner diameter of the coil body 7, an efficient axial heat dissipation channel can be established in the hottest area inside the coil body 7. The heat conduction principle of the heat-conducting pillar 8 is as follows: the heat-conducting pillar 8 is made of metal and contains a large number of freely moving electrons. When the part of the heat-conducting pillar 8 that contacts the coil body 7 gains energy, the electron movement speed will increase rapidly and can be quickly diffused from the hot end of the heat-conducting pillar 8 to the cold end, which is the principle of heat conduction.
[0037] After the coil body 7 is wound, pin assembly 10 is welded to the upper and lower ends of the coil body 7. The pin assembly 10 includes pin one 101 and pin two 102. Pin one 101 is located at the lower left end of the coil body 7, and pin two 102 is located at the lower right end of the coil body 7.
[0038] The pin assembly 10 is set in two groups for connection with the PCB pads. The pin assembly 10 is soldered to the upper and lower ends of the coil body 7 respectively, and is set in an L-shape to form a parallel soldering surface with the PCB pads. At the same time, the lower end of the pin assembly 10 is set to be wider on the left and narrower on the right, and the corresponding PCB pads must also match the pin settings. This setting can ensure that the workers will not solder the pin assembly 10 to the PCB pads in reverse when connecting them with solder.
[0039] Meanwhile, the bottom of the pin assembly 10 is provided with a bump 2. The bump 2 can increase the contact area and adhesion of the solder when the pin assembly 10 contacts the PCB pad.
[0040] The bottom of the pin assembly 10 is made of composite metal material, with a high-strength steel core inside and a highly conductive copper layer on the outside. This gives the pin assembly 10 high strength and makes it less prone to bending and deformation, while also giving the bottom of the pin assembly 10 excellent solderability and conductivity.
[0041] The working principle of this flat coil integrated inductor structure is as follows: A frame 6 is set inside the outer shell assembly 1, and heat-conducting pillars 8 are set at equal angles on the outside of the frame 6. Limiting blocks 9 are set on the outside of the heat-conducting pillars 8. An annular groove is formed between every two sets of limiting blocks 9. The annular groove formed between every two sets of limiting blocks 9 facilitates the uniform winding of the coil body 7 around the outside of the frame 6. In addition, since both the frame 6 and the outer shell assembly 1 are magnetic and are located on the inner and outer sides of the coil body 7 respectively, the inductor structure can form a continuous and complete magnetic circuit, reducing the need for... In the event of magnetic leakage, the heat-conducting pillar 8 located on the outer side of the frame 6 is positioned inside the inner diameter of the coil body 7. Its upper end contacts the upper side wall of the outer shell assembly 1, while its lower side wall is flush with the bottom of the outer shell assembly 1. This allows for efficient heat dissipation inside the coil body 7. Furthermore, two sets of pin assemblies 10 are soldered to both ends of the coil body 7. The bottom of the pin assembly 10 is divided into one wide and one narrow set to facilitate rapid soldering with the PCB. Additionally, a bump 2 is provided at the bottom of the pin assembly 10 to increase the contact soldering surface and adhesion when soldering with the PCB.
[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An integrated inductor structure with a flat coil, characterized in that: It includes a housing assembly (1), a frame (6) is provided in the middle of the housing assembly (1), a coil body (7) is provided on the outside of the frame (6), and pin assemblies (10) are welded to the upper and lower ends of the coil body (7).
2. The integrated inductor structure of a flat coil according to claim 1, characterized in that, The outer shell assembly (1) includes an upper shell (11) and a lower shell (12). The upper shell (11) is disposed on the upper side of the lower shell (12), and the upper shell (11) and the lower shell (12) are the same size.
3. The integrated inductor structure of a flat coil according to claim 2, characterized in that, The lower end of the upper shell (11) is provided with symmetrical locking holes (3) on the left and right sides. The locking holes (3) are connected with locking pins (4), which are symmetrically fixed to the upper end of the lower shell (12).
4. The integrated inductor structure of a flat coil according to claim 3, characterized in that, The middle part of the lower shell (12) is closely fitted to the lower end of the frame (6), and the middle part of the lower shell (12) and the lower end of the middle part of the frame (6) are fixedly connected by bolts (5).
5. The integrated inductor structure of a flat coil according to claim 4, characterized in that, The frame (6) is equipped with heat-conducting columns (8) at equal angles on the outside. The heat-conducting columns (8) are set in four groups. Each group of heat-conducting columns (8) is vertically provided with a limiting block (9) on the outside. The two groups of limiting blocks (9) are closely attached to the coil body (7) in the transverse direction.
6. The integrated inductor structure of a flat coil according to claim 1, characterized in that, The pin assembly (10) includes pin one (101) and pin two (102). Pin one (101) is located at the lower left end of the coil body (7), and pin two (102) is located at the lower right end of the coil body (7). The bottom end of pin one (101) is larger than the bottom end of pin two (102). Both pin one (101) and pin two (102) have protrusions (2) at their bottom ends.