Coil component, coil component material belt, symmetrical connection magnet and magnetic element
By designing a coil assembly including a symmetrical connection bridge, the problem of difficult positioning of the molded inductor electrode is solved, and high-precision control of the electrode position and reduction of defects in the process are achieved.
Patent Information
- Application Number
- CN202411544806.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-02-18
AI Technical Summary
When the existing molded inductor is pressed and molded, it is difficult to accurately locate the electrode position, which makes it difficult to control the electrode position size.
A coil assembly is designed, including a first coil, a second coil and a connecting bridge, the first coil and the second coil are symmetrically connected to both ends of the connecting bridge, and the connecting bridge is used to position the first coil and the first magnet during molding. and the relative position of the second coil and the second magnet.
Through the design of this coil assembly, the accurate positioning of the electrode on the magnet is achieved, the accuracy and control of the electrode position are improved, and the adverse defects in the process are reduced.
Smart Images
Figure CN119480401A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of magnetic elements, and in particular to a coil assembly and a symmetrically connected magnet based on the coil assembly, and a single magnetic element obtained by the symmetrically connected magnet. Background Art
[0002] Inductors usually include magnets and coils, and molded inductors generally place the coil in a mold, inject magnetic materials into the mold and press it into shape. Existing molded inductors place the coil during pressing and forming, and when the coil needs to be exposed at the bottom and top to form the upper and lower electrodes, the coil is prone to shaking in the horizontal direction, resulting in the coil often being unable to be accurately positioned, making it difficult to control the position and size of the electrode. Summary of the invention
[0003] In view of this, the present invention proposes a special coil assembly, which can accurately locate the position of the electrode during molding, thereby solving the problem that the electrode position of the existing molded inductor is difficult to locate during compression molding.
[0004] According to one aspect of the present invention, a coil assembly is proposed, comprising: a first coil, a second coil and a connecting bridge, wherein the first coil and the second coil are symmetrically connected to two ends of the connecting bridge; wherein the first coil is used for a first magnet to form an internally embedded coil and an external electrode of a first magnetic element, and the second coil is used for a second magnet to form an internally embedded coil and an external electrode of a second magnetic element; the connecting bridge is used to locate the relative position of the first coil and the first magnet, and to locate the relative position of the second coil and the second magnet when the first magnet and the second magnet are molded.
[0005] Furthermore, the first coil includes a first section, a second section and a third section connected at both ends of the first section, and the second coil includes a fourth section, a fifth section and a sixth section connected at both ends of the fourth section; wherein the second section and the fifth section are respectively connected to the two ends of the connecting bridge; the first section is used to be buried in the first magnet to serve as an internal buried coil of the first magnetic element, and the fourth section is used to be buried in the second magnet to serve as an internal buried coil of the second magnetic element; the second section and the third section are used to respectively form two external electrodes of the first magnetic element; the fifth section and the sixth section are used to respectively form two external electrodes of the second magnetic element.
[0006] Furthermore, the second segment of the first coil and the fifth segment of the second coil are both coplanar with the connecting bridge; the second segment and the third segment of the first coil are parallel to each other and not coplanar; the fifth segment and the sixth segment of the second coil are parallel to each other and not coplanar.
[0007] Furthermore, the minimum length of the connecting bridge between the second section and the fifth section is 0.5 mm, preferably 0.5 to 5 mm, and more preferably 1 to 3 mm.
[0008] Furthermore, the first coil, the second coil and the connecting bridge are integrally formed into the coil assembly.
[0009] When the coil assembly of the above technical solution of the present invention is applied to the pressing process of molded inductors, the connecting bridge between the first magnet and the second magnet can be used as the electrode positioning reference to achieve the three-axis positioning of the coils on both sides relative to the corresponding magnets, thereby ensuring the accuracy of the position of the electrodes on the magnets. In addition, since the coil assembly has a symmetrical structure as a whole, it not only keeps the coil assembly in a balanced state during the handling process, but also keeps the coil in a balanced force state during the pressing process, thereby reducing the generation of defects.
[0010] According to another aspect of the present invention, a coil assembly material strip is provided, comprising: a first connecting rib, a second connecting rib, and a plurality of coil assemblies, wherein the coil assemblies are the aforementioned coil assemblies, the first connecting rib simultaneously connects a plurality of the first coils of the plurality of coil assemblies, and the second connecting rib simultaneously connects a plurality of the second coils of the plurality of coil assemblies. The technical solution of the present invention forms a material strip by connecting a plurality of coil assemblies through connecting ribs, which facilitates the automated production and transportation of coil assemblies and can improve their efficiency in making molded inductors.
[0011] According to another aspect of the present invention, a symmetrically connected magnet is also proposed, comprising: at least one coil assembly, and a first magnet and a second magnet symmetrically formed on the at least one coil assembly; wherein the coil assembly comprises a first coil, a second coil and a connecting bridge, and the first coil and the second coil are symmetrically connected to the two ends of the connecting bridge; the first magnet is formed on the first coil, and the second magnet is formed on the second coil; the connecting bridge is used to position the relative position of the first coil and the first magnet, and to position the relative position of the second coil and the second magnet when the first magnet and the second magnet are molded.
[0012] Furthermore, the first coil includes a first section, a second section and a third section connected to both ends of the first section, and the second coil includes a fourth section, a fifth section and a sixth section connected to both ends of the fourth section; wherein the second section and the fifth section are respectively connected to both ends of the connecting bridge; the first section is buried in the first magnet, and the fourth section is buried in the second magnet; the second section and the third section both include an embedded portion buried in the first magnet and a protruding portion exposed on the surface of the first magnet; the fifth section and the sixth section both include an embedded portion buried in the second magnet and a protruding portion exposed on the surface of the second magnet.
[0013] Furthermore, the protruding portion of the second section and the protruding portion of the third section are respectively located on two opposite surfaces of the first magnet; the protruding portion of the fifth section and the protruding portion of the sixth section are respectively located on two opposite surfaces of the second magnet.
[0014] Furthermore, the thickness of the embedded portion of each of the second section, the third section, the fifth section and the sixth section is more than 1 / 2 of the thickness of each section, preferably 2 / 3 to 4 / 5 of the thickness of each section.
[0015] The symmetrically connected magnet of the above technical solution of the present invention has a structural design of the coil assembly that enables the coil assembly to be accurately positioned when the magnet is molded, thereby ensuring the accuracy of the position of the electrode on the magnet and making the electrode position controllable; and, since the coil assembly has a symmetrical structure and two magnets are symmetrically molded on both sides, one coil assembly can be used for molding two magnets at the same time, thereby accurately positioning the electrode positions of the two magnetic elements at the same time.
[0016] According to another aspect of the present invention, a magnetic element is proposed, which is obtained by cutting the aforementioned symmetrically connected magnets; wherein, the magnetic element including the first coil and the first magnet is obtained by cutting along the connection between the first coil and the connecting bridge, or the magnetic element including the second coil and the second magnet is obtained by cutting along the connection between the second coil and the connecting bridge.
[0017] Furthermore, the electrode of the magnetic element protrudes from the side of the magnet of the magnetic element by 0 to 0.05 mm. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Schematic diagram of symmetrically connected magnets according to an embodiment of the present invention.
[0019] Figure 2 Schematic diagram of a coil assembly strip according to an embodiment of the present invention.
[0020] Figure 3Schematic diagram of a molded inductor according to an embodiment of the present invention. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods and examples. It should be understood by those skilled in the art that the purpose of providing the embodiments is only for illustration, and not for any limitation. In addition, the spatial orientation words such as "upper", "lower", "left", "right", "top", "bottom" etc. used in the description of the technical solution of the present invention are convenient for describing the relative position relationship between the components of the product, and do not represent that the product has only the swing direction shown in the figure. In actual use, as the product swing direction is different (for example, rotated 90 degrees or other orientations), the spatial related descriptions used to describe its swing direction should also be explained in a similar manner. In addition, the words "first", "second" etc. are only used to distinguish components. It should be understood that these components should not be limited by such words. They themselves do not mean that these elements have the aforementioned ordinal numbers, nor do they represent the arrangement order of a certain component and another component, or the order in the manufacturing method.
[0022] Please refer to Figure 1 , an embodiment of the present invention provides a symmetrically connected magnet, which includes a coil assembly and a first magnet 10 and a second magnet 20 symmetrically formed on the coil assembly. The coil assembly includes a first coil 1, a second coil 2 and a connecting bridge 3. In one embodiment of the present invention, the first coil 1 can be divided into three parts, namely, a first section 11, a second section 12 connected to both ends of the first section 11, and a third section 13; similarly, the second coil 2 can also be divided into three parts, namely, a fourth section 21, a fifth section 22 connected to both ends of the fourth section, and a sixth section 23; wherein the second section 12 and the fifth section 22 are respectively connected to both ends of the connecting bridge 3.
[0023] Continue to refer Figure 1 , the first section 11 of the coil assembly is buried in the first magnet 10, and the fourth section 21 is buried in the second magnet 20; in the thickness direction, the second section 12 and the third section 13 both include a buried portion buried in the first magnet 10 and a protruding portion exposed on the surface of the first magnet 10; similarly, the fifth section 22 and the sixth section 23 both include a buried portion buried in the second magnet 20 and a protruding portion exposed on the surface of the second magnet 20; wherein the protruding portion of the second section 12 and the protruding portion of the third section 13 are respectively located on two opposite surfaces of the first magnet 10, for example Figure 1 The protruding portion of the fifth section 22 and the protruding portion of the sixth section 23 are respectively located on two opposite surfaces of the second magnet 20, for example Figure 1That is, the second segment 12 of the first coil 1 and the fifth segment 22 of the second coil 2 can be coplanar with the connecting bridge 3 at the same time; the second segment 12 and the third segment 13 of the first coil 1 can be parallel to each other and not coplanar; the fifth segment 22 and the sixth segment 23 of the second coil 2 can be parallel to each other and not coplanar.
[0024] In some preferred embodiments, the thickness of the embedded portion of each of the second segment 12, the third segment 13, the fifth segment 22 and the sixth segment 23 is more than 1 / 2 of the thickness of each segment, preferably 2 / 3 to 4 / 5. That is, most of each of the second segment 12, the third segment 13, the fifth segment 22 and the sixth segment 23 is embedded in the corresponding magnet, and the thickness of the portion of each segment protruding from the surface of the magnet is about 0.03 to 0.23 mm, more preferably 0.06 to 0.12 mm.
[0025] Preferably, the thickness of the second section 12 protruding from the upper surface of the first magnet 10 is equal to the thickness of the third section 13 protruding from the lower surface of the first magnet 10, and the area of the second section 12 exposed from the upper surface of the first magnet 10 is equal to the area of the third section 13 exposed from the lower surface of the first magnet 10; similarly, the thickness of the fifth section 22 protruding from the upper surface of the second magnet 20 is equal to the thickness of the sixth section 23 protruding from the lower surface of the second magnet 20, and the area of the fifth section 22 exposed from the upper surface of the second magnet 20 is equal to the area of the sixth section 23 exposed from the lower surface of the second magnet 20. In addition, in some specific embodiments, the length of the connecting bridge of the coil assembly (the length between the second section 12 and the fifth section 22) is at least 0.5 mm, preferably 0.5-5 mm, and more preferably between 1-3 mm.
[0026] The symmetrical connection magnet provided in the above embodiment of the present invention is cut from both ends of the connection bridge 3 (i.e., the connection between the connection bridge 3 and the second section 12, and the connection between the connection bridge 3 and the fifth section 22), and after removing the connection bridge, two pieces can be obtained. Figure 3 The molded inductor shown in the figure, wherein the first magnet 10 and the first coil 1 constitute a molded inductor, the first section 11 of the first coil 1 constitutes the internal coil of the molded inductor, and the second section 12 and the third section 13 respectively form two external electrodes of the molded inductor, as shown in FIG. Figure 3 Similarly, the second magnet 20 and the second coil 2 constitute another molded inductor with the same structure, and the specific structure is not repeated here. It should be understood that the external electrodes of the molded inductor are not limited to the case where there is one electrode on the top surface and one electrode on the bottom surface in the aforementioned embodiment. In other embodiments, the external electrodes of the molded inductor can be other numbers, but preferably, the number of the top surface electrodes is consistent with the number of the bottom surface electrodes.
[0027] It should be noted that Figure 1The symmetrically connected magnet shown only exemplarily depicts one coil assembly. In fact, the symmetrically connected magnet of the present invention may include more than two coil assemblies. Specifically, when the symmetrically connected magnet of an embodiment of the present invention includes 2, 3 or even more coil assemblies, the first magnet of the symmetrically connected magnet is molded with multiple first coils at the same time, and the second magnet is molded with multiple second coils at the same time, and the corresponding multiple connecting bridges are located in parallel between the first magnet and the second magnet. More preferably, in order to facilitate the process, the multiple connecting bridges of the multiple coil assemblies can be connected together. In this way, the single inductor obtained by cutting has multiple top electrodes and multiple bottom electrodes, and the number of top electrodes and the number of bottom electrodes are respectively equal to the number of coil assemblies contained in the symmetrically connected magnet.
[0028] In addition, it should be understood that the shape of the portion of the first coil 1 (such as the first section) in which the coil is buried inside the magnet is not limited, that is, it is not limited to the straight shape shown in the figure, but can also be other shapes, such as Z-shaped or other shapes that can achieve the functions of the present invention. The second coil is also the same and will not be described in detail.
[0029] In some specific embodiments, the top electrode of the molded inductor protrudes from the side of the inductor magnet by 0 to 0.2 mm, preferably by 0 to 0.05 mm. Figure 3 In the inductor shown, the top electrode protrudes from the right side of the magnet by approximately 0 to 0.05 mm.
[0030] It should be understood that the coil assembly of the embodiment of the present invention can be integrally stamped using a conductive material (such as copper). In some embodiments, in order to facilitate the automatic production and transportation of the coil assembly, connecting ribs can be added at both ends of the coil assembly to form a continuous coil assembly strip of the plurality of aforementioned coil assemblies, such as Figure 2 As shown, the material strip includes: a plurality of the aforementioned coil components and two connecting ribs 4 and 5, wherein the connecting rib 4 simultaneously connects the third section of the first coil 1 of the plurality of coil components, and the connecting rib 5 simultaneously connects the sixth section of the second coil 2 of the plurality of coil components, so that the plurality of coil components form a continuous material strip. When making a molded inductor, molding can be performed simultaneously to obtain a symmetrically connected magnet material strip containing a plurality of symmetrically connected magnets, which greatly improves the speed of automated production.
[0031] The embodiment of the present invention solves the problem of poor horizontal and vertical accuracy of the electrode position of the molded inductor by optimizing the coil component structure and process, and improves the position accuracy of the electrode on the product. The current level is generally ±0.2mm. The present invention can achieve an accuracy level of ±0.05mm (XYZ three-axis direction) by using the aforementioned coil component. In addition, the process yield of such structural products is improved, and the symmetrical structure greatly reduces the occurrence of defects such as chipping, cracks, coil deformation, and electrode exposure caused by unbalanced stress conditions in the process; and reduces the difficulty of the process.
[0032] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art of the present invention, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.
Claims
1. A coil assembly, characterized in that: include: A first coil, a second coil and a connecting bridge, wherein the first coil and the second coil are symmetrically connected to two ends of the connecting bridge; The first coil is used for a first magnet to form an internally embedded coil and an external electrode of a first magnetic element, and the second coil is used for a second magnet to form an internally embedded coil and an external electrode of a second magnetic element; the connecting bridge is used to locate the relative position of the first coil and the first magnet, and to locate the relative position of the second coil and the second magnet when the first magnet and the second magnet are molded.
2. The coil assembly according to claim 1, characterized in that The first coil includes a first section, a second section and a third section connected to both ends of the first section, and the second coil includes a fourth section, a fifth section and a sixth section connected to both ends of the fourth section; wherein the second section and the fifth section are connected to both ends of the connecting bridge respectively; The first section is used to be buried in the first magnet to serve as an internal buried coil of the first magnetic element, and the fourth section is used to be buried in the second magnet to serve as an internal buried coil of the second magnetic element; the second section and the third section are used to respectively form two external electrodes of the first magnetic element; the fifth section and the sixth section are used to respectively form two external electrodes of the second magnetic element.
3. The coil assembly according to claim 2, characterized in that The second section of the first coil and the fifth section of the second coil are both coplanar with the connecting bridge; the second section and the third section of the first coil are parallel to each other and not coplanar; the fifth section and the sixth section of the second coil are parallel to each other and not coplanar.
4. The coil assembly according to claim 2, characterized in that: The length of the connecting bridge between the second section and the fifth section is at least 0.5 mm.
5. The coil assembly according to claim 1, characterized in that: The first coil, the second coil and the connecting bridge are integrally formed into the coil assembly.
6. A coil assembly strip, characterized in that: include: A first connecting rib, a second connecting rib and a plurality of coil assemblies, wherein the coil assembly is the coil assembly according to any one of claims 1 to 5, wherein the first connecting rib simultaneously connects a plurality of the first coils of the plurality of coil assemblies, and the second connecting rib simultaneously connects a plurality of the second coils of the plurality of coil assemblies.
7. A symmetrically connected magnet, characterized in that: include: at least one coil assembly, and a first magnet and a second magnet symmetrically formed on the at least one coil assembly; The coil assembly includes a first coil, a second coil and a connecting bridge, and the first coil and the second coil are symmetrically connected to two ends of the connecting bridge; The first magnet is formed on the first coil, and the second magnet is formed on the second coil; the connecting bridge is used to locate the relative position of the first coil and the first magnet, and to locate the relative position of the second coil and the second magnet when the first magnet and the second magnet are molded.
8. The symmetrically connected magnet according to claim 7, characterized in that: The first coil includes a first section, a second section and a third section connected to both ends of the first section, and the second coil includes a fourth section, a fifth section and a sixth section connected to both ends of the fourth section; wherein the second section and the fifth section are connected to both ends of the connecting bridge respectively; The first section is buried in the first magnet, and the fourth section is buried in the second magnet; the second section and the third section both include an embedded portion buried in the first magnet and a protruding portion exposed on the surface of the first magnet; the fifth section and the sixth section both include an embedded portion buried in the second magnet and a protruding portion exposed on the surface of the second magnet.
9. The symmetrically connected magnet according to claim 8, characterized in that: The protruding portion of the second section and the protruding portion of the third section are respectively located on two opposite surfaces of the first magnet; the protruding portion of the fifth section and the protruding portion of the sixth section are respectively located on two opposite surfaces of the second magnet.
10. The symmetrically connected magnet according to claim 8, characterized in that: The thickness of the embedded portion of each of the second section, the third section, the fifth section, and the sixth section is greater than 1 / 2 of the thickness of each section.
11. A magnetic element, characterized in that: Obtained by cutting the symmetrically connected magnets according to any one of claims 7 to 10; The magnetic element including the first coil and the first magnet is obtained by cutting along the connection between the first coil and the connection bridge, or the magnetic element including the second coil and the second magnet is obtained by cutting along the connection between the second coil and the connection bridge.
12. The magnetic element according to claim 11, characterized in that The electrode of the magnetic element protrudes from the side of the magnet of the magnetic element by 0 to 0.05 mm.