Magnetic device and electronic apparatus

Abstract

The application relates to the technical field of magnetic devices, and discloses a magnetic device and an electronic device, the magnetic device comprising: a magnetic core, the magnetic core comprising a winding body and support bodies arranged at two ends of the winding body; terminals, the terminals being respectively connected to one side of the support bodies away from the winding body, and each terminal being provided with a winding body; windings, the windings being arranged on the winding body, and the lead wires of the windings being electrically connected to the winding bodies of each terminal; the winding body being bent at an inclined angle from the outside to the inside of the terminals in the opposite direction of the terminals, and the winding body being provided with a winding groove for winding the lead wires of the windings and / or accommodating the electrically connected welding points of the winding body and the lead wires of the windings. The application improves the reliability of the magnetic device and optimizes the space occupancy rate of the magnetic device.

Description

Technical Field

[0001] This application relates to the field of magnetic device technology, specifically to a magnetic device and electronic device. Background Technology

[0002] With the development of electronics and intelligence, the number and density of electronic components on the PCB board of electronic systems are increasing. The exposed electrical connection points of the coil leads and terminals of magnetic devices are a major weakness in practical applications. First, they occupy valuable PCB board space, and second, they are prone to collision damage during installation. This deficiency needs to be addressed. Utility Model Content

[0003] In view of this, this application provides a magnetic device and an electronic device to solve the aforementioned technical problems.

[0004] In a first aspect, embodiments of this application disclose a magnetic device, comprising: A magnetic core, the magnetic core comprising a winding body and support bodies disposed at both ends of the winding body; Terminals are respectively connected to the side of the support body away from the winding body. Each terminal is provided with a patch electrode and a winding body. The patch electrodes are arranged at a distance on the side of the winding body and are disposed on the end face of the support body. A winding, wherein the winding is wound on the winding body, and the leads of the winding are electrically connected to the winding body of each terminal respectively; The winding body is bent at an inclination angle from the outside to the inside of the terminal in the opposite direction of the terminal, and the winding body is provided with a winding groove for winding the lead wire of the winding, and / or accommodating the electrical connection solder joint between the winding body and the lead wire of the winding.

[0005] In one possible example, the winding body includes a bottom section, a recessed section, and a top section, with the two ends of the recessed section connected to the bottom section and the top section respectively to form the winding groove, and the end of the bottom section away from the recessed section connected to the terminal.

[0006] In one possible example, the widths of the bottom section and the recess are L1 and L2, respectively. Then: L1 > 1 times the thickness of the terminal; and L2 ≤ (L1 - 0.25 times the wire diameter of the winding conductor).

[0007] In one possible example, each of the terminals is provided with a patch electrode disposed on the end face of the support; and the patch electrode on each of the terminals is located between adjacent winding bodies, or the winding bodies on each of the terminals are located between adjacent patch electrodes.

[0008] In one possible example, the support body is provided with a clearance groove, the clearance groove corresponding to the bend of the winding body relative to the terminal, and the bottom of the clearance groove is not higher than the bend, and the winding body is located within the clearance groove.

[0009] In one possible example, the winding body has a bending groove at the bend relative to the terminal, the bending groove facing the clearance groove.

[0010] In one possible example, the support body has a receiving groove on the side opposite to the winding body, the terminal is connected in the receiving groove, and the groove depth is ≥0.5 times the thickness of the terminal.

[0011] In one possible example, the patch electrode is bent from the side of the support and connected to the end face of the support relative to the terminal, and the patch electrode and the end face of the support are provided with a minimum distance, the minimum distance > 0 and the minimum distance < 1 times the thickness of the terminal.

[0012] In one possible example, the tilt angle ranges from 5° to 85°.

[0013] Secondly, embodiments of this application disclose an electronic device including a magnetic device as described in any of the above embodiments.

[0014] In summary, compared with the prior art, this application discloses a magnetic device and an electronic device. The magnetic device includes a magnetic core, terminals, and windings. The magnetic core includes a winding body and supports at both ends of the winding body. The terminals are respectively connected to the side of the supports away from the winding body. Each terminal is provided with a winding body. The windings are wound on the winding body, and the leads of the windings are electrically connected to the winding body of each terminal. The winding body is bent at an inclined angle from the outside to the inside of the terminal in the opposite direction. The winding body is provided with winding grooves for winding the leads of the windings and / or accommodating the electrical connection solder joints between the winding body and the leads of the windings. That is, through the above-mentioned configuration, the space occupation of the magnetic device is optimized and the reliability of the magnetic device is improved. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the first magnetic device of this application; Figure 2 This is a three-dimensional structural schematic diagram of the second type of magnetic device in this application; Figure 3 yes Figure 1 A three-dimensional structural diagram of the magnetic components hidden behind the windings; Figure 4 yes Figure 2 A three-dimensional structural diagram of the magnetic components hidden behind the windings; Figure 5 yes Figure 1 A three-dimensional structural diagram of the terminals of the magnetic device in the diagram; Figure 6 yes Figure 2 A three-dimensional structural diagram of the terminals of the magnetic device in the diagram; Figure 7 yes Figure 1 A side view of the terminals of the magnetic device in the diagram; Figure 8 yes Figure 2 A side view of the terminals of the magnetic device in the diagram; Figure 9 This is a side view of the structure of the first magnetic device of this application; Figure 10 yes Figure 9 Enlarged view of point A. Detailed Implementation

[0017] 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 numbers in different drawings represent 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 claims.

[0018] 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.

[0019] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Please refer to Figures 1 to 4 The magnetic device of this application includes a magnetic core 1, a terminal 2, and a winding 3.

[0024] In the specific implementation process, the magnetic core 1 includes a winding body 11 and a support body 12 disposed at both ends of the winding body 11. The terminals 2 are respectively connected to the side of the support body 12 away from the winding body 11. Each terminal 2 is provided with a winding body 4. The winding 3 is wound on the winding body 11, and the lead wire of the winding 3 is electrically connected to the winding body 4 of each terminal 2.

[0025] The winding body 4 is bent at an inclination angle from the outside to the inside of the terminal 2 in the opposite direction of the terminal 2, and the winding body 4 is provided with a winding groove 6 for winding the lead wire of the winding 3, and / or accommodating the electrical connection solder joint 6a between the winding body 4 and the lead wire of the winding 3.

[0026] Through the design of this inclined structure, the winding body 4 can not only shrink inward in terms of spatial layout to optimize the space occupancy of magnetic devices, but also reserve a suitable inward position for subsequent solder joint arrangement. In addition, the winding groove 6 ensures the stability and consistency of the lead wire of the winding 3 during the winding process, realizing the electrical connection between the winding body 4 and the winding 3. Through the cooperation of the inclined structure and the winding groove, the solder joint 6a is completely retracted inside the product after the electrical connection is completed, and will not protrude from the outer contour of the product. This prevents damage to the wire or solder joint caused by direct or indirect customer soldering board mounting or collision during use. The inward solder joint design releases the tension of the lead wire of the winding 3, reducing the possibility of wire loss when the magnetic device is subjected to impact and vibration, improving the overall structural strength and reliability of the product. At the same time, this design does not increase the external length of the product. While maintaining miniaturization, it enhances the stability and durability of the internal connection, making it suitable for the packaging requirements of high-density electrical connections.

[0027] In the specific implementation process, each terminal 2 is provided with a patch electrode 5, which is disposed on the end face of the support body 12. The patch electrode 5 on each terminal 2 is located between adjacent wire winding bodies 4, or the wire winding bodies 4 on each terminal 2 are located between adjacent patch electrodes 5. This arrangement can flexibly select the positions of the wire winding bodies 4 and patch electrodes 5 according to different external connection design requirements, so as to adapt to the matching requirements of the preset pads of the corresponding patch electrodes 5 on the external device, and ensure the compatibility and process adaptability of the magnetic devices during the mounting process.

[0028] In one example, refer to Figures 5 to 8 The winding body 4 includes a bottom section 41, a recessed section 42 and a top section 43. The two ends of the recessed section 42 are respectively connected to the bottom section 41 and the top section 43 to form a winding groove 6. The end of the bottom section 41 away from the recessed section 42 is connected to the terminal 2, thereby facilitating the bending and tilting of the winding body 4.

[0029] Optionally, the bottom section 41, the recessed section 42, and the top section 43 are integrally connected to ensure the overall structural strength of the winding body 4.

[0030] Preferably, the widths of the bottom section 41 and the recessed section 42 are L1 and L2, respectively, then: L1 > 1 times the thickness of the terminal 2; and L2 ≤ (L1 - 0.25 times the wire diameter of the winding 3).

[0031] The design of L1 > 1 times the thickness of terminal 2 ensures sufficient contact area between solder joint 6a and terminal 2, avoiding the problem of solder joint 6a falling off, and further ensuring the structural strength of the winding body 4. During the winding process of winding 3, it prevents the winding body 4 from tilting or deforming due to winding tension, thus ensuring the stability of product dimensions. In addition, L2 ≤ (L1 - 0.25 times the wire diameter of winding 3) can prevent the winding from loosening, which is conducive to the stable winding or hanging of the wire in the winding groove 6 of the winding body 4 during the winding process, avoiding the problem of wire slippage during the winding process, thereby improving the process stability and product consistency of winding 3.

[0032] Preferably, the width of the top section 43 is L3, then L1=L3, so as to further ensure sufficient contact area between the solder joint 6a and the terminal 2 and avoid the problem of solder joint 6a falling off.

[0033] The recessed portion 42 may also be provided with auxiliary grooves 421 on one or both sides to further optimize the size of the winding groove 6, prevent the winding from coming loose, and ensure that the wire is stably wound or hung in the winding groove 6 of the winding body 4.

[0034] Optionally, the cross-sectional profile of the recess 42 is arc-shaped, crescent-shaped, rectangular, or wedge-shaped to facilitate the winding of the wire.

[0035] In the specific implementation process, the tilt angle (such as...) Figure 7 or Figure 8 The range of the Q marking is 5° to 85°, so that the winding body 4 can not only shrink inward in terms of spatial layout to optimize the space occupancy of magnetic devices, but also reserve a suitable inward position for the subsequent solder joint arrangement and buffer the tension of the winding lead.

[0036] Preferably, the tilt angle is 15°, 35°, 55° and 75°.

[0037] Continue to refer to Figure 3 and Figure 4 The support body 12 is provided with a clearance groove 7, which corresponds to the bend of the winding body 4 relative to the terminal 2. The bottom of the clearance groove 7 is not higher than the bend, and the winding body 4 is located in the clearance groove 7, that is, the winding body 4 can be completely contained in the clearance groove 7.

[0038] Therefore, the bent and inclined winding body 4 avoids the solid area of ​​the support body 12, thus preventing interference with the support body 12. At the same time, the winding body 4 is located in the clearance groove 7, which can provide a certain degree of protection during the winding process or when subjected to external impact, reducing the risk of deformation or displacement of the winding body 4 and improving the mechanical stability of the magnetic device. It also avoids damage to the wire or solder joints caused by collisions during the use of the magnetic device. In addition, the clearance groove 7 ensures that there is sufficient physical isolation space between the electrical connection solder joint 6a of the winding body 4 and the winding 3 and the winding 3, thereby improving the structural reliability of the magnetic device and optimizing the overall performance of the magnetic device.

[0039] Furthermore, the winding body 4 is provided with a bending groove 8 at the bend relative to the terminal 2, with the bending groove 8 facing the clearance groove 7. This facilitates the bending of the winding body 4 from the outside to the inside of the terminal 2 in the opposite direction. It also allows the bent part of the winding body 4 to be more fully accommodated and protected with the cooperation of the bending groove 8 and the clearance groove 7. The synergistic effect of the bending groove 8 and the clearance groove 7 can provide buffering when the device is subjected to external impact or vibration, thereby reducing the risk of deformation of the winding body 4 or damage to the solder joint 6a, and improving the mechanical reliability of the terminal 2 and the overall structure of the winding body 4.

[0040] Preferably, the cross-sectional profile of the bending groove 8 gradually narrows from the outer side to the inner side of the opposite direction of the terminal 2, so that the winding body 4 can be bent more easily on the terminal 2 from the outer side to the inner side of the opposite direction of the terminal 2 based on the bending groove 8, thereby avoiding the hard extrusion deformation at the bending point of the winding body 4 and improving the structural strength of the inclined design of the winding body 4.

[0041] In one example, the support body 12 has a receiving groove 9 on the side away from the winding body 11, and the terminal 2 is connected in the receiving groove 9 so that the support body 12 can form a stable connection with the terminal 2 through the receiving groove 9.

[0042] Preferably, the depth of the receiving groove 9 is ≥ 0.5 times the thickness of the terminal 2. Through the structural design of the receiving groove 9, the terminal 2 is made to be in an inward state in the overall structure of the product, avoiding the problem of traditional external terminals occupying extra length, thus not increasing the external length of the product. At the same time, the setting of the receiving groove 9 increases the magnetic conductive area between the magnetic core 1 and the cover plate, effectively improving the inductance while ensuring the overall structure of the magnetic core is compact.

[0043] Optionally, the support body 12 is bonded and fixed to the terminal 2, that is, an adhesive layer can be provided in the receiving groove 9, and the terminal 2 is fixedly connected to the support body 12 in the receiving groove 9 through the adhesive layer.

[0044] The outline shape of terminal 2 can match the shape of the accommodating groove 9 so as to better fix and connect terminal 2 and support 12.

[0045] Continue to combine Figure 9 and Figure 10 The patch electrode 5 is bent from the side of the support body 12 and covers the end face of the support body 12 relative to the terminal 2. The patch electrode 5 and the end face of the support body 12 are provided with a minimum distance H, where H > 0 and H < 1 times the thickness of the terminal 2. This allows the patch electrode 5 to rebound and deform at H when subjected to external impact or vibration, thereby absorbing part of the impact energy and preventing the impact from directly acting on the body of the terminal 2 or the solder joint, thus improving the mechanical reliability and long-term stability of the terminal structure.

[0046] In one example, the magnetic device also includes a magnetic cover plate 10, which is connected to the end of the support 12 away from the patch electrode 5 and forms a closed magnetic circuit with the magnetic core 1, so that the magnetic flux is basically concentrated inside the magnetic core 1, reducing magnetic leakage loss and improving magnetic flux utilization.

[0047] The magnetic device of this application includes a magnetic core 1, terminals 2, windings 3, and a magnetic cover plate 10. The magnetic core 1 includes a winding body 11 and support bodies 12 disposed at both ends of the winding body 11. The terminals 2 are respectively connected to the side of the support body 12 away from the winding body 11. Each terminal 2 is provided with a winding body 4 and a patch electrode 5. The winding 3 is wound on the winding body 11, and the lead wire of the winding 3 is electrically connected to the winding body 4 of each terminal 2. The winding body 4 is bent at an inclined angle from the outside to the inside of the terminal 2 in the opposite direction. The winding body 4 is provided with a winding groove 6. The lead wire of the winding 3 is wound in the winding groove 6, and the solder joint 6a between the winding body 4 and the lead wire of the winding 3 is located on the winding groove 6. The patch electrode 5 is disposed on the end face of the support body 12. The patch electrode 5 on each terminal 2 is located between adjacent winding bodies 4, or the winding body 4 on each terminal 2 is located between adjacent patch electrodes 5. Thus, through the inclined structure design of the winding body 4 and the cooperation of the winding groove 6, the solder joint 6a is completely retracted into the inside of the product after the electrical connection is completed, and will not protrude from the outer contour of the product. This prevents damage to the wire or solder joint caused by direct or indirect customer soldering board patching or collision during use. In addition, the inward solder joint design releases the tension of the winding 3 lead wire, reducing the possibility of wire loss when the magnetic device is subjected to impact and vibration, and improving the overall structural strength and reliability of the product.

[0048] Preferably, the magnetic cover plate 10 and the support body 12 can be fixed by means of bonding or pressing, so that the magnetic device can maintain structural stability under vibration, impact and high temperature environment.

[0049] Specifically, the contact surface between the magnetic cover plate 10 and the support body 12 may be provided with an adhesive layer. The adhesive layer ensures that the magnetic cover plate 10 and the support body 12 are parallel to each other, and that the magnetic cover plate 10 is flush with the outer surface of the magnetic core 1, thereby making the overall structure of the magnetic device flat and simple, so as to further improve the device installation integration.

[0050] Both the magnetic core 1 and the magnetic cover plate 10 are made of magnetic materials. These magnetic materials can include one or more of ferrite materials, magnetic metal alloy materials, iron-silicon alloy materials, or soft magnetic materials to meet the working requirements of the magnetic device.

[0051] Among them, the solder joint 6a can be set in a spherical structure. The smooth spherical structure can prevent the lead wire of the winding 3 from being scratched. That is, the solder joint 6a set in a spherical structure ensures that the lead wire can be neatly and evenly applied in the winding groove 6.

[0052] Of course, the structural shape of solder joint 6a in this embodiment is not limited to this. It can also be other shapes that facilitate the fixed connection of the winding 3 leads, which will not be described in detail here.

[0053] In the specific implementation process, the winding body 11 can be designed as a rectangular structure so that the turns of the winding 3 can be stacked more easily, that is, more winding space is provided, and the edges and corners of the rectangular body can also be used to adjust the magnetic field distribution of the magnetic device, which helps to optimize the performance of the magnetic device and makes it easier to process and manufacture in the production process.

[0054] Furthermore, the winding body of winding 3 can be made of copper enameled wire. It is understood that metallic copper is an excellent conductive material with low resistance. Using copper enameled wire as winding 3 can reduce the resistance of magnetic devices and improve current transmission efficiency. In addition, copper has good thermal conductivity, which can effectively conduct heat away from winding 3, avoiding the degradation or damage of inductance performance due to excessive temperature. On the other hand, copper enameled wire can usually withstand high temperatures and is suitable for applications in some high-temperature environments. This is very important for magnetic devices that need to operate under high-temperature conditions. Moreover, copper enameled wire has high corrosion resistance and can resist the erosion of some chemicals, thereby extending the service life of magnetic devices.

[0055] In one example, each terminal 2 of the magnetic device of this application is provided with at least one winding body 4, and the winding 3 includes at least one coil wound on the winding body 11. The wire of the coil is wound on the winding body 4 once to form a lead, and the lead of the winding 3 is electrically connected to the winding body 4 of each terminal 2. The number of winding bodies 4 is set to M, and the number of coils is set to N. Then the relationship between the number of winding bodies 4 and the number of coils is: M=N+1, where N≥1.

[0056] Therefore, based on the coil setting of winding body 4 and winding 3 with M=N+1, the coil of the magnetic device only needs to be wound once to form winding body 11 to form winding 3, instead of making independent external lead connections for each turn. There are only two wire ends of winding 3 on winding body 4, which can reduce external welding / crimping points, reduce the risk of contact failure or cold welding cracks between winding 3 and terminal 2 due to vibration / impact, and thus improve the performance and reliability of inductor device.

[0057] Furthermore, based on this winding method that avoids the independent external leads of the coil, the wire diameter of the winding 3 coil can be reduced, and the wire spacing of the coil can be reduced. This increases the unit current density of the magnetic device under the same volume conditions, reduces its transmission loss, and thus improves the overall performance of the device.

[0058] This application also discloses an electronic device, including a magnetic device 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 magnetic device in the above embodiment, which will not be repeated here.

[0059] The magnetic devices and electronic devices 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 emphases. Parts not described in detail or in a certain embodiment can be referred to the relevant descriptions of other embodiments.

[0060] 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 magnetic device, characterized in that, include: A magnetic core, the magnetic core comprising a winding body and support bodies disposed at both ends of the winding body; Terminals are respectively connected to the side of the support body away from the winding body, and each terminal is provided with a winding body; A winding, wherein the winding is wound on the winding body, and the leads of the winding are electrically connected to the winding body of each terminal respectively; The winding body is bent at an inclination angle from the outside to the inside of the terminal in the opposite direction of the terminal, and the winding body is provided with a winding groove for winding the lead wire of the winding, and / or accommodating the electrical connection solder joint between the winding body and the lead wire of the winding.

2. The magnetic device as described in claim 1, characterized in that, The winding body includes a bottom section, a recessed section, and a top section. The two ends of the recessed section are respectively connected to the bottom section and the top section to form the winding groove, and the end of the bottom section away from the recessed section is connected to the terminal.

3. The magnetic device as described in claim 2, characterized in that, The widths of the bottom section and the recessed section are L1 and L2, respectively. Then: L1 > 1 times the thickness of the terminal; and L2 ≤ (L1 - 0.25 times the wire diameter of the winding conductor).

4. The magnetic device as described in claim 1, characterized in that, Each of the terminals is provided with a patch electrode, which is disposed on the end face of the support. Furthermore, the patch electrode on each of the terminals is located between adjacent wound bodies, or the wound body on each of the terminals is located between adjacent patch electrodes.

5. The magnetic device as described in claim 1, characterized in that, The support body is provided with a clearance groove, which corresponds to the bend of the winding body relative to the terminal, and the bottom of the clearance groove is not higher than the bend, and the winding body is located in the clearance groove.

6. The magnetic device as described in claim 5, characterized in that, The winding body has a bending groove at the bend relative to the terminal, and the bending groove faces the clearance groove.

7. The magnetic device as described in claim 1, characterized in that, The support body has a receiving groove on the side opposite to the winding body, the terminal is connected in the receiving groove, and the depth of the receiving groove is ≥0.5 times the thickness of the terminal.

8. The magnetic device as described in claim 4, characterized in that, The patch electrode is bent from the side of the support body and connected to the end face of the support body relative to the terminal. The patch electrode and the end face of the support body are provided with a minimum distance, the minimum distance > 0, and the minimum distance < 1 times the thickness of the terminal.

9. The magnetic device according to any one of claims 1 to 8, characterized in that, The tilt angle ranges from 5° to 85°.

10. An electronic device, characterized in that, Including the magnetic device as described in any one of claims 1 to 9.

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