High-stability inductor and electronic equipment
By designing functional slots and multi-functional slot structures in the inductor, combined with high and low density magnets, the problem of easy electrode detachment in the inductor in the automotive environment was solved, and the high stability and reliability of the inductor were achieved.
Patent Information
- Application Number
- CN202423076670.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing inductors are prone to detachment or cracking of electrodes and PCB solder joints in automotive environments, failing to meet high reliability requirements. Current technologies struggle to balance mechanical strength and connection reliability.
A high-stability inductor is designed by creating functional slots on a first magnet to accommodate the winding coil. The electrodes extend to the side of the magnet and are fastened to the step. The combination of multifunctional slot design and high and low density magnets enhances the connection reliability and mechanical fixation strength between the electrodes and the winding coil.
It improves the stability and overall sealing of inductors under high mechanical loads, enhances the connection strength between electrodes and PCB boards, reduces the difficulty of detecting contact resistance and welding defects, and improves product reliability and production efficiency.
Smart Images
Figure CN223513761U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of magnetic devices, in particular to a high-stability inductor and an electronic device. BACKGROUND
[0002] With the rapid development of automotive electronics technology, the performance and reliability of components and devices for vehicle-mounted equipment are required to be higher, and the inductor, as one of the key electronic components, is widely used in vehicle-mounted power management systems, signal filtering and energy storage scenes. The vehicle-mounted environment has the characteristics of strong vibration, large acceleration and sharp temperature change, which makes the inductor need to withstand extreme mechanical impact and thermal shock during use. In the prior art, the electrodes of the inductor are usually arranged at the bottom of the magnet, and the width is limited by the width of the coil wire. The electrode area is limited, and in the high mechanical impact scene, the electrode and the solder joint of the PCB are prone to soldering or cracking, which cannot meet the reliability requirements of vehicle-mounted applications. In order to meet the harsh requirements of the vehicle-mounted environment, the industry gradually explores to improve the inductor structure design to improve the mechanical strength, connection reliability and environmental adaptability of the product. However, the prior art still cannot provide an inductor suitable for complex vehicle-mounted applications while considering high reliability, and this situation needs to be changed. CONTENT OF THE UTILITY MODEL
[0003] In view of this, the present application provides a high-stability inductor and an electronic device to solve the above-mentioned technical problems.
[0004] To achieve the above purpose, according to the first aspect, the technical scheme adopted is:
[0005] A high-stability inductor, comprising:
[0006] A first magnet, a first functional groove is formed in the first magnet, and a winding coil is arranged in the first functional groove;
[0007] A second magnet, the second magnet is press-fit connected to the top end of the first magnet, and covers the first functional groove and encapsulates the winding coil;
[0008] An electrode, the electrode is attached to the bottom end of the first magnet, and one end of the electrode extends to the side surface of the first magnet and is electrically connected to the lead-out end of the winding coil;
[0009] A step, the step is arranged on the side of the first magnet away from the lead-out end of the winding coil, and the other end of the electrode extends to the side surface of the first magnet and is buckled on the step.
[0010] The present application is further provided that a coil connecting column is arranged in the first magnet and at the center of the first functional groove, and the winding coil is sleeved on the coil connecting column.
[0011] This application is further configured such that: the electrodes are symmetrically arranged at the bottom end of the first magnet along a first direction, and the two ends of the electrodes extend along a second direction on the side of the first magnet, wherein the second direction is the axial direction of the coil connecting post, and the first direction is perpendicular to the second direction.
[0012] This application further specifies that: the electrode includes a welding part and a soldering part, the welding part is attached to the bottom end of the first magnet, the soldering part is integrally connected to one end of the welding part and electrically connected to the lead end of the winding coil on the side of the first magnet, and the welding part is planar on the side away from the first magnet.
[0013] The present application further specifies that the electrode includes a connecting portion, which is integrally connected to the other end of the welding portion and fastened to the step on the side of the first magnet.
[0014] This application further specifies that: the step protrudes from the side of the first magnet, and the connecting part is fastened to the step by two bends.
[0015] This application is further configured such that: a second functional slot is formed on the first magnet along the first direction, the second functional slot is connected to and communicates with the first functional slot, and is used to accommodate and guide the lead-out end of the winding coil.
[0016] This application is further configured such that: a third functional slot is formed on the first magnet along the second direction, the third functional slot is connected to and communicates with the second functional slot, and is used to accommodate and guide the lead-out end of the winding coil and the electrode.
[0017] This application further specifies that the density of the first magnet is ≥ (1.05 to 1.5) times the density of the second magnet.
[0018] According to the second aspect, the technical solution adopted is as follows:
[0019] An electronic device comprising the high-stability inductor described in any of the above embodiments.
[0020] In summary, compared with the prior art, this application discloses a high-stability inductor and electronic device. The high-stability inductor includes a first magnet, a second magnet, an electrode, and a step. The first magnet has a first functional slot, in which a winding coil is disposed. The second magnet is pressed and connected to the top of the first magnet, covering the first functional slot and encapsulating the winding coil. The electrode is attached to the bottom of the first magnet, with one end extending to the side of the first magnet and electrically connected to the lead-out end of the winding coil. The step is located on the side of the first magnet away from the lead-out end of the winding coil, and the other end of the electrode extends to the side of the first magnet and is fastened to the step. Through the above configuration, the mechanical fixing strength of the electrode is improved, the connection reliability between the electrode and the winding coil is enhanced, the overall sealing performance of the inductor is improved, and the stability of the inductor under high mechanical loads is enhanced. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a three-dimensional structural diagram of the high-stability inductor in this embodiment;
[0023] Figure 2 This is a three-dimensional structural diagram of a high-stability inductor from another perspective in this embodiment;
[0024] Figure 3 This is a three-dimensional structural diagram of the first magnet in this embodiment;
[0025] Figure 4 This is a bottom view of the high-stability inductor in this embodiment. Detailed Implementation
[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.
[0028] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0029] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.
[0030] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0031] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.
[0032] Please refer to Figures 1 to 4 The high-stability inductor of this application includes a first magnet 1, a second magnet 3, an electrode 4, and a step 5.
[0033] In the specific implementation process, the first magnet 1 is provided with a winding coil 2. Specifically, the first magnet 1 is provided with a first functional slot 11, and the winding coil 2 is arranged in the first functional slot 11. The second magnet 3 is pressed and connected to the top of the first magnet 1, that is, the second magnet 3 covers the first functional slot 11 and encapsulates the winding coil 2.
[0034] Furthermore, electrode 4 is attached to the bottom end of the first magnet 1, and one end of electrode 4 extends to the side of the first magnet 1 and is electrically connected to the lead end of the winding coil 2. Step 5 is provided on the side of the first magnet 1 away from the lead end of the winding coil 2, and the other end of electrode 4 extends to the side of the first magnet 1 and is fastened to step 5.
[0035] In this embodiment of the high-stability inductor, one end of electrode 4 extends to the side of the first magnet 1 and is electrically connected to the lead-out end of the winding coil 2, thereby increasing the electrical connection area of the inductor component and reducing contact resistance. This extended structure enhances the connection reliability between the electrode and the coil lead-out end, effectively coping with the effects of vibration and temperature changes in the vehicle environment, thereby improving device reliability. On the other hand, when the inductor is soldered to external devices (such as PCB boards) through electrode 4, the side-extended electrode 4 can ensure the side soldering effect of the inductor, which can improve the connection strength between the inductor and the PCB board pads, thereby improving the mechanical reliability of the product.
[0036] Furthermore, through the design of step 5, the other end of electrode 4 extends to the side of the first magnet 1 and is fastened to step 5, thereby forming a multi-point support structure for electrode 4, which improves the mechanical fixing strength of electrode 4 and can better resist vibration, impact and mechanical stress during long-term use.
[0037] Furthermore, the first magnet 1 and the second magnet 3 cooperate to encapsulate the winding coil 2, thereby allowing for flexible assembly of inductor devices, improving the overall sealing and environmental adaptability of the inductor, and the first magnet 1 and the second magnet 3 are connected by pressing to form a robust composite structure, enhancing the stability of the inductor under high mechanical loads.
[0038] Furthermore, through the design of step 5, the end of electrode 4 can protrude from the first magnet 1, which can expose the inductor solder joint to the side, making it easier to inspect by automated optical inspection (AOI) equipment after mounting, thereby reducing the difficulty of detecting soldering defects and helping to improve product consistency and reliability.
[0039] In one embodiment, a coil connecting post 14 is provided in the first magnet 1 and at the center of the first functional slot 11. The winding coil 2 is sleeved on the coil connecting post 14. The coil connecting post 14 is located at the center of the first functional slot 11, which can provide a fixed central support point, so that the winding coil 2 can be wound evenly according to a preset trajectory, avoiding misalignment, looseness or overlap of the coil during the winding process, thereby improving the performance consistency of the inductor. It can be understood that the winding coil 2 is sleeved on the coil connecting post 14 to form a stable support structure, preventing the coil from being displaced or deformed under external forces such as vibration and impact, thereby ensuring the reliability of the device.
[0040] Furthermore, the center positioning function of the coil connection post 14 enables the lead-out end of the winding coil 2 to be precisely connected to the electrode 4 with a shorter path, reducing resistance loss and the risk of poor connection. At the same time, the coil connection post 14 is located in the center of the first functional slot 11, which helps to achieve the best coupling between the winding coil and the magnetic core, improving magnetic circuit efficiency and the energy conversion performance of the inductor.
[0041] In one embodiment, the electrodes 4 are symmetrically arranged at the bottom end of the first magnet 1 along a first direction, and the two ends of the electrodes 4 extend along the side of the first magnet 1 along a second direction, wherein the second direction is the axial direction of the coil connecting post 14, and the first direction is perpendicular to the second direction.
[0042] It should be noted that this application constructs an XYZ spatial coordinate system, in order to... Figure 2 For example, the Z-axis direction can be regarded as the first direction, the X-axis direction as the second direction, and the Y-axis direction as the third direction. The first direction can also be regarded as the axial direction of the coil connecting post 14, the second direction can also be regarded as the left and right extension direction of the high-stability inductor, and the third direction can also be regarded as the front and back extension direction of the high-stability inductor. Of course, this embodiment is not limited to this. XYZ can also be any other direction that is perpendicular to each other in space in actual needs, which will not be elaborated here.
[0043] The electrodes 4 are symmetrically arranged along the first direction at the bottom of the first magnet 1, achieving a uniformly distributed support structure. The symmetry helps to balance mechanical stress, especially in vehicle vibration and impact environments, effectively preventing the electrodes from deforming or loosening due to stress concentration. Furthermore, the symmetrical arrangement of the electrodes 4 along the first direction can reduce parasitic inductance and parasitic resistance caused by uneven current distribution, improving the performance of the inductor in high-frequency applications. It also makes the welding area uniformly distributed, which helps to achieve consistent welding quality and facilitates high-precision welding by automated equipment. At the same time, the two ends of the electrodes 4 extend along the second direction on the side of the first magnet 1, thereby satisfying the side soldering effect of the side-extended electrodes 4 on the inductor and improving the connection strength between the inductor and the PCB board pads.
[0044] In specific implementation, electrode 4 may include a welding part 41 and a soldering part 42. The welding part 41 is attached to the bottom end of the first magnet 1, and the soldering part 42 is integrally connected to one end of the welding part 41 and electrically connected to the lead end of the winding coil 2 on the side of the first magnet 1. The side of the welding part 41 facing away from the first magnet 1 is arranged in a planar manner, thereby ensuring a fine connection between electrode 4 and the first magnet 1, ensuring the connection strength and the structural strength of electrode 4 itself.
[0045] The electrode 4 may also include a connecting part 43, which is integrally connected to the other end of the welding part 41 and is fastened to the step 5 on the side of the first magnet 1.
[0046] It should be noted that step 5 protrudes from the side of the first magnet 1, and the connecting part 43 is tightly fastened to step 5 by two bends.
[0047] The welding part 41 is attached to the bottom end of the first magnet 1 and is designed in a planar form, which effectively increases the contact area between the electrode and the first magnet 1, improves welding stability and overall mechanical strength. The solder crawling part 42 is electrically connected to the lead end of the winding coil 2 on the side, forming a firm electrical connection path, reducing contact resistance and optimizing solder joint quality. The partitioned design of the welding part 41, the solder crawling part 42 and the connecting part 43 realizes functional refinement. The double-bending and tight-fitting design of the connecting part 43 and the step 5 increases the fixing strength of the electrode 4 through mechanical snap-fit, effectively preventing loosening caused by vehicle vibration or impact. The step 5 protrudes from the side of the first magnet 1, providing physical support for the connecting part 43 and avoiding electrode displacement or damage caused by long-term use. The protruding design of the step 5 and the mechanical snap-fit of the connecting part 43 form a clear positioning mechanism, which improves the accuracy of electrode installation, reduces errors in manual operation, and the side electrode design facilitates AOI inspection of welding quality, improving production yield.
[0048] In one embodiment, a second functional slot 12 is formed on the first magnet 1 along a first direction, the second functional slot 12 is connected to and communicates with the first functional slot 11, and is used to accommodate and guide the lead-out end of the winding coil 2; and a third functional slot 13 is formed on the first magnet 1 along a second direction, the third functional slot 13 is connected to and communicates with the second functional slot 12, and is used to accommodate and guide the lead-out end of the winding coil 2 and the electrode 4.
[0049] The segmented design of the second functional slot 12 and the third functional slot 13, through a clear guiding path, allows the lead end of the winding coil 2 to gradually extend from the first functional slot 11 to the electrode 4, avoiding stress concentration caused by bending or suspension of the lead wire. By providing clear accommodating space, the exposed length of the lead end of the winding coil 2 is reduced, effectively reducing the risk of breakage of the lead end of the winding coil 2 due to vibration or environmental impact. Furthermore, the functional slot design ensures accurate positioning of the lead end of the winding coil 2 and the electrode 4, providing stable support for welding or electrical connection, reducing the possibility of welding position deviation, and thus improving the quality and reliability of electrical connection.
[0050] Furthermore, the second functional slot 12 extends along the first direction, and the third functional slot 13 extends along the second direction. This multi-dimensional functional slot design can adapt to the complex lead wiring requirements of the winding coil, while providing more arrangement space for the electrode 4. This helps to achieve a compact design and improve the integration of the components. That is, through the design and connection arrangement of the second functional slot 12 and the third functional slot 13, the reasonable positioning and reliable connection between the lead end of the winding coil 2 and the electrode 4 can be achieved. The physical protection and path guidance of the functional slots significantly improve the safety of the lead arrangement, the stability of the electrical connection, and the overall mechanical and environmental adaptability of the inductor. At the same time, it simplifies the assembly process and the testing process, ultimately improving the production efficiency and reliability of the inductor.
[0051] Optionally, the leads of the winding coil 2 and the electrode 4 can be stacked in the third functional slot 13 and electrically connected by laser welding or soldering.
[0052] It is understandable that the leads of the winding coil 2 can be led out from the top and bottom ends of the winding coil 2 respectively, and thus these two leads are electrically connected to the symmetrically arranged electrodes 4 respectively. Based on the winding arrangement of the winding coil 2 on the coil connecting post 14, the two leads of the winding coil 2 are staggered in the first direction. That is to say, the extension height of the solder-climbing part 42 of the two electrodes 4 on the side of the first magnet 1 is not the same.
[0053] In one embodiment, the density of the first magnet 1 is ≥ (1.05 to 1.5) times the density of the second magnet 3, thereby ensuring better permeability of the inductor magnet. This allows the magnetic field lines to be more effectively guided to concentrate in the core area when the winding coil 2 is working, reducing the dispersion and loss of the magnetic field and improving the performance of the inductor. Furthermore, the combination of the high-density first magnet 1 and the low-density second magnet 3 effectively controls the distribution of magnetic field lines between the magnets through density differences, reducing the impact of magnetic leakage on surrounding components and improving the overall electromagnetic compatibility (EMC) of the inductor. At the same time, the low-density characteristics of the second magnet 3 give it better compressibility and deformation capability during the packaging process, allowing it to fit tightly with the first magnet 1, thereby improving the packaging quality and avoiding cracks or gaps.
[0054] In one embodiment, if step 5 protrudes from the side of the first magnet 1, then step 5 has a designed protrusion value relative to the side of the first magnet 1, and the range of this designed protrusion value includes -0.1mm to 0.2mm.
[0055] This application also discloses an electronic device, including a high-stability inductor as described in any of the above embodiments. For other working principles and processes of the electronic device in this embodiment, please refer to the description of the high-stability inductor in the above embodiment, which will not be repeated here.
[0056] The high-stability inductor and electronic device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. It should be noted that the descriptions of each embodiment in this application have different focuses, and parts not described in detail or in a certain embodiment can be referred to the relevant descriptions of other embodiments.
[0057] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. The technical features of the technical solution of this application can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are also included within the patent protection scope of this application, as long as the combination of these technical features does not contradict each other.
Claims
1. A high-stability inductor, characterized in that, include: A first magnet, wherein a first functional slot is provided on the first magnet and a winding coil is disposed in the first functional slot; The second magnet is press-fitted to the top of the first magnet and covers the first functional slot and encapsulates the winding coil; An electrode is attached to the bottom end of the first magnet, and one end of the electrode extends to the side of the first magnet and is electrically connected to the lead end of the winding coil. A step is provided on the side of the first magnet away from the lead end of the winding coil, and the other end of the electrode extends to the side of the first magnet and is fastened to the step.
2. The high-stability inductor as described in claim 1, characterized in that, A coil connecting post is provided in the first magnet and at the center of the first functional slot, and the winding coil is sleeved on the coil connecting post.
3. The high-stability inductor as described in claim 2, characterized in that, The electrodes are symmetrically arranged at the bottom end of the first magnet along a first direction, and the two ends of the electrodes extend along a second direction on the side of the first magnet, wherein the second direction is the axial direction of the coil connecting post, and the first direction is perpendicular to the second direction.
4. The high-stability inductor as described in claim 1, characterized in that, The electrode includes a welding part and a soldering part. The welding part is attached to the bottom end of the first magnet. The soldering part is integrally connected to one end of the welding part and electrically connected to the lead end of the winding coil on the side of the first magnet. The side of the welding part away from the first magnet is planar.
5. The high-stability inductor as described in claim 4, characterized in that, The electrode also includes a connecting portion integrally connected to the other end of the welding portion and fastened to the step on the side of the first magnet.
6. The high-stability inductor as described in claim 5, characterized in that, The step protrudes from the side of the first magnet, and the connecting part is fastened to the step by two bends.
7. The high-stability inductor as described in claim 3, characterized in that, A second functional slot is formed on the first magnet along the first direction. The second functional slot is connected to and communicates with the first functional slot, and is used to accommodate and guide the lead-out end of the winding coil.
8. The high-stability inductor as described in claim 7, characterized in that, A third functional slot is formed on the first magnet along the second direction. The third functional slot is connected to and communicates with the second functional slot, and is used to accommodate and guide the lead-out end of the winding coil and the electrode.
9. The high-stability inductor as described in claim 1, characterized in that, The density of the first magnet is ≥ (1.05 to 1.5) times the density of the second magnet.
10. An electronic device, characterized in that, Including the high-stability inductor as described in any one of claims 1 to 9.