Anti-glue-overflow assembled electromagnetic element

Abstract

The utility model provides an anti-glue-overflow assembled electromagnetic element, which comprises a magnet at least comprising a first magnetic subsection and a second magnetic subsection which are oppositely arranged along a first direction, the two magnetic subsections are bonded through glue to form an accommodating cavity, and a groove is formed at the bonding part of the two magnetic subsections, the groove depth direction of the groove is parallel to the bonding surface of the first magnetic subsection and the second magnetic subsection, the notch of the groove is positioned on the preset surface of the magnet, the preset surface is vertical to the bonding surface, and the adhesive overflowing from the bonding surface is accommodated in the groove; the coil is arranged in the accommodating cavity; and the at least two external terminals are respectively connected to two opposite wire ends of the coil, and the external terminals extend out of the accommodating cavity. On the basis, the mucilage glue cannot overflow on the outer surface of the magnet, so that an independent process for erasing the overflowing mucilage glue is not needed, the process is simplified, the working efficiency is improved, meanwhile, the influence of solidification of the overflowing mucilage glue on the product size and subsequent assembly is eliminated, the bonding area of the bonding position is increased, and the bonding strength can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic components, and in particular to an anti-overflow glue assembled electromagnetic component. Background Art

[0002] With the rapid development of science and technology, especially the emergence of multifunctional equipment, the demand for passive devices as a whole is increasing. As one of the passive components, electromagnetic components are also widely used. Among them, assembled electromagnetic components are an important product that can adapt to the needs of scenarios such as large current, high frequency, and high reliability. Therefore, they are widely used. Assembled electromagnetic components are generally assembled by magnets, coils, and external terminals connected to the coils, and the magnets are formed by at least two magnets bonded together by adhesive. In the current assembled electromagnetic components, the bonding surfaces of the two magnets are both flat. After bonding, the adhesive will overflow toward the side due to extrusion, and eventually overflow onto the outer surface of the magnet perpendicular to the bonding surface, that is, there is adhesive overflow at the bonding interface of the two magnets. Therefore, the operator needs to wipe off the overflowed adhesive through a process, which not only makes the process complicated, but also if the adhesive is not wiped off cleanly, the cured adhesive will cause the size of the final product to become larger, affecting the product's suitability for subsequent assembly. Utility Model Content

[0003] In view of this, the present application provides an anti-overflow glue assembled electromagnetic component, which can improve the problem of glue overflowing from the bonding point of the magnet to the outer surface of the magnet, and the resulting problem of not wiping off the overflowed glue, which affects the size of the final product and subsequent assembly.

[0004] The present application provides an anti-overflow glue assembled electromagnetic component, comprising:

[0005] The magnet comprises at least a first magnetic section and a second magnetic section, the first magnetic section and the second magnetic section being arranged opposite each other along a first direction and bonded together by adhesive to form a receiving cavity, a groove being formed at the bonding point between the first magnetic section and the second magnetic section, the groove having a depth parallel to the bonding surface of the first magnetic section and the second magnetic section, a notch of the groove being located on a predetermined surface of the magnet, the predetermined surface being perpendicular to the bonding surface, and adhesive overflowing from the bonding surface being received in the groove;

[0006] a coil, disposed in the accommodating cavity;

[0007] At least two external terminals are respectively connected to two opposite wire ends of the coil, and the external terminals extend out of the accommodating cavity.

[0008] Optionally, at the groove, the first magnetic division and the second magnetic division are both provided with a step structure, the step structure including a first step plane, a second step plane and a step side surface, the first step plane and the second step plane are arranged opposite to each other along the first direction, the step side surface is connected between the first step plane and the second step plane, the first step plane serves as the bonding surface of the corresponding magnetic division, the second step plane serves as the groove wall of the groove, and the step side surface is used to form the groove bottom of the groove.

[0009] Optionally, the first magnetic section and the second magnetic section are symmetrically arranged along the bonding surface.

[0010] Optionally, for one of the first magnetic division and the second magnetic division, the height difference between the first step plane and the second step plane is less than half the width of the groove, and for the other of the first magnetic division and the second magnetic division, the height difference between the first step plane and the second step plane is greater than half the width of the groove.

[0011] Optionally, at the groove, one of the first magnetic division and the second magnetic division is provided with a step structure, the step structure including a first step plane, a second step plane and a step side surface, the first step plane and the second step plane are arranged opposite to each other along a first direction, the step side surface is connected between the first step plane and the second step plane, the first step plane serves as a bonding surface of the corresponding magnetic division, the second step plane serves as a groove wall of the groove, the step side surface serves as the groove bottom of the groove, and the height difference between the first step plane and the second step plane is equal to the width of the groove; the other of the first magnetic division and the second magnetic division is a plane, and serves as the other groove wall of the groove at the groove.

[0012] Optionally, the magnet includes a first surface, a second surface and four side surfaces, the first surface and the second surface are arranged opposite to each other along a first direction, the four side surfaces are connected end to end between the first surface and the second surface in sequence, the preset surface includes two side surfaces arranged opposite to each other along a direction parallel to the groove depth, one of the remaining two side surfaces is provided with a first opening to allow the accommodating cavity to communicate with the outside world through the first opening, and the at least two external terminals extend out of the accommodating cavity through the first opening.

[0013] Optionally, the other of the remaining two side surfaces is provided with a second opening to allow the accommodating cavity to communicate with the outside world via the second opening, and the opening area of ​​the second opening is smaller than the opening area of ​​the first opening; the preset surface also includes the portion of the other of the remaining two side surfaces other than the second opening.

[0014] Optionally, the groove extends to two opposite sides of the second opening.

[0015] Optionally, the grooves are symmetrically arranged on opposite sides of the second opening.

[0016] Optionally, at least one of the first magnetic section and the second magnetic section is provided with a convex column. When the first magnetic section and the second magnetic section are bonded by adhesive, the convex column is located in the accommodating cavity and serves as the magnetic center column of the magnet; the coil is wound around the magnetic center column.

[0017] As described above, in the anti-overflow glue assembled electromagnetic element of the present application, the magnet includes a first magnetic part and a second magnetic part bonded by glue, and a groove is formed at the bonding point of the two. The groove depth direction of the groove is parallel to the bonding surface of the first magnetic part and the second magnetic part, and the notch of the groove is located on the preset surface of the magnet. The preset surface is perpendicular to the bonding surface, and the glue overflowing through the bonding surface is contained in the groove, so that it will not overflow on the outer surface of the magnet, thereby eliminating the need for the operator to wipe off the overflowed glue through a process, simplifying the process, improving work efficiency, and at the same time eliminating the impact of the curing of the overflowed glue on the product size and subsequent assembly, and increasing the bonding area of ​​the bonding point, which can improve the bonding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 and Figure 2 2. It is a structural stereogram of an electromagnetic element according to one embodiment of the present application from two perspectives;

[0019] Figure 3 yes Figure 1 A side view of the electromagnetic element is shown;

[0020] Figure 4 yes Figure 1 a bottom view of the electromagnetic element shown;

[0021] Figure 5 yes Figure 1 An exploded schematic diagram of the electromagnetic components shown;

[0022] Figure 6 yes Figure 3 An enlarged view of the dashed area A of the electromagnetic element shown;

[0023] Figure 7 yes Figure 6 The dotted area A is a schematic structural diagram when not bonded.

[0024] First direction x, second direction y, third direction z;

[0025] Magnet 1;

[0026] Accommodating cavity 10a, protruding column 10, first magnetic portion 11, second magnetic portion 12, groove 13, adhesive 14;

[0027] Adhesive surface 140 , first surface 141 , second surface 142 , first side surface 143 , second side surface 144 , third side surface 145 , fourth side surface 146 , first opening 147 , second opening 148 ;

[0028] First step plane 111, second step plane 112, step side surface 113;

[0029] Coil 2, accommodating area 20;

[0030] External terminal 3. DETAILED DESCRIPTION

[0031] For the first magnetic division and the second magnetic division bonded by adhesive, the present application provides a groove at the bonding point of the two magnetic divisions, the groove depth direction of the groove is parallel to the bonding surface of the first magnetic division and the second magnetic division, the notch of the groove is located on the preset surface of the magnet, and the preset surface is perpendicular to the bonding surface. The adhesive overflowing from the bonding surface is accommodated in the groove, so as not to overflow on the outer surface of the magnet, and the overflowing adhesive is accommodated in the groove, which increases the bonding area between the two magnetic divisions and can improve the bonding strength.

[0032] The specific expressions of parameters such as the shape, quantity, and size of each magnetic section, coil, and external terminal can be determined according to the actual application scenario and the required adaptability of the configuration, and this application does not limit them.

[0033] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only some of the embodiments of this application, not all of them. Unless there is a conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of this application.

[0034] Please also refer to Figures 1 to 7 An anti-overflow glue assembled electromagnetic component of an embodiment of the present application (some descriptions in this document may be referred to as "electromagnetic component" or "assembled electromagnetic component") includes a magnet 1, a coil 2 and at least two external terminals 3. The figure uses two external terminals 3 as an example for exemplary description and display. The electromagnetic component includes but is not limited to an inductor.

[0035] For ease of description and understanding, in conjunction with the placement orientation shown in the figure, the thickness direction of the electromagnetic element is referred to as the first direction x, the height direction is referred to as the second direction y, and the width direction is referred to as the third direction z. The first direction x, the second direction y, and the third direction z are perpendicular to each other and can be regarded as the three coordinate axes of a three-dimensional rectangular coordinate system. It should be understood that the so-called perpendicularity in this application does not require that the angle between the two must be 90°, but rather allows for a deviation of, for example, ±10°, that is, the so-called perpendicularity can be understood as the angle between any two directions being 80° to 100°. Similarly, the so-called parallelism in this application does not require that the angle between the two must be 0° or 180°, but rather allows for a deviation of, for example, ±10°, that is, the so-called parallelism can be understood as the angle between any two directions being 0° to 10° or 170° to 190°.

[0036] The magnet 1 includes at least a first magnetic section 11 and a second magnetic section 12, which are arranged opposite each other along a first direction x and bonded together by adhesive 14 to form a receiving cavity 10a. The bonded first and second magnetic sections 11, 12 provide a closed magnetic path.

[0037] like Figure 5 As shown, at least one of the first magnetic division 11 and the second magnetic division 12 can be provided with a protrusion 10. For example, for the symmetrically arranged first magnetic division 11 and the second magnetic division 12, the first magnetic division 11 and the second magnetic division 12 can both be provided with a protrusion 10, and the heights of the protrusions 10 of the two are equal. When the first magnetic division 11 and the second magnetic division 12 are bonded by the adhesive 14, the protrusions 10 of the two are aligned and can be bonded, so as to be located in the accommodating cavity 10a and serve as the magnetic center column of the magnet 1.

[0038] like Figure 4 and Figure 6 As shown, a groove 13 is formed at the bonding point of the first magnetic division 11 and the second magnetic division 12, and the groove depth direction of the groove 13 is parallel to the third direction z, and the groove depth direction of the groove 13 is parallel to the bonding surface 140 of the first magnetic division 11 and the second magnetic division 12. The notch of the groove 13 is located on the preset surface of the magnet 1, and the preset surface is perpendicular to the bonding surface 140 of the first magnetic division 11 and the second magnetic division 12. The adhesive 14 overflowing from the bonding surface 140 is accommodated in the groove 13.

[0039] Taking the overall rectangular magnet 1 shown in the figure as an example, the magnet 1 includes a first surface 141, a second surface 142 and four side surfaces, respectively referred to as the first side surface 143, the second side surface 144, the third side surface 145 and the fourth side surface 146. The first surface 141 and the second surface 142 are arranged relative to each other along the first direction x, and the four side surfaces are connected end to end between the 141 and the second surface 142. Among them, the first side surface 143 and the third side surface 145 are arranged relative to each other along a direction parallel to the groove depth (i.e., the third direction z), and the fourth side surface 146 and the second side surface 144 are arranged relative to each other along the second direction y.

[0040] The preset surface includes at least two side surfaces arranged opposite to each other along a direction parallel to the groove depth z. In this example, the preset surface includes at least a first side surface 143 and a third side surface 145. That is, the magnet 1 is provided with a groove 13 at the side ends corresponding to the first side surface 143 and the third side surface 145. The extension direction (or length direction) of the groove 13 can be parallel to the second direction y.

[0041] The coil 2 is disposed in the accommodating cavity 10 a and can be wound around the magnetic center column of the magnet 1 .

[0042] In one example, the coil 2 can be formed by winding a strip-shaped (or long sheet-shaped) conductor around a receiving area 20 in turns. The receiving area 20 can be regarded as a cavity where the inner turn of the coil 2 is located, and can be the area to which the axis extends during winding. The thickness of the coil 2 (i.e., the length along the second direction y, also known as the "height") can be defined by the thickness of the conductor and the number of turns. The two ends of the conductor are the two wire ends of the coil 2 that are arranged opposite to each other along the first direction x, one of which is located at the upper end of the coil 2 and the other is located at the lower end of the coil 2.

[0043] The two external terminals 3 are respectively connected to the two opposite ends of the wire of the coil 2, and the external terminals 3 extend out of the accommodating cavity 10a. Figure 2 and Figure 4 In the example shown, the fourth side surface 146 of the magnet 1 is provided with a first opening 147 to allow the accommodating cavity 10 a to communicate with the outside via the first opening 147 , and the two external terminals 3 extend out of the accommodating cavity 10 a via the first opening 147 .

[0044] The adhesive 14 applied between the first magnetic section 11 and the second magnetic section 12 overflows toward the groove 13 after being squeezed by the bonding surface 140 of the first magnetic section 11 and the second magnetic section 12. The overflowed adhesive 14 will be accommodated in the groove 13, so as not to overflow on the outer surface of the magnet 1, such as the first side surface 143 and the third side surface 145 shown in the figure. Therefore, the operator does not need to go through an additional process to wipe off the overflowed adhesive 14, which simplifies the process and improves the working efficiency. At the same time, it eliminates the influence of the curing of the overflowed adhesive 14 on the product size and subsequent assembly. In addition, the overflowed adhesive 14 is accommodated in the groove 13, which increases the bonding area between the first magnetic section 11 and the second magnetic section 12, thereby improving the bonding strength.

[0045] In one example, combined Figure 4 、 Figure 6 and Figure 7 As shown, at the groove 13, the first magnetic division 11 and the second magnetic division 12 are both provided with a step structure, and the step structure includes a first step plane 111, a second step plane 112 and a step side surface 113. The first step plane 111 and the second step plane 112 are arranged opposite to each other along the first direction x, and the step side surface 113 is vertically connected between the first step plane 111 and the second step plane 112. The first step plane 111 serves as the bonding surface 140 of the corresponding magnetic division, the second step plane 112 serves as the groove wall of the groove 13, and the step side surface 113 is used to form the groove bottom of the groove 13.

[0046] Here, after the first magnetic section 11 and the second magnetic section 12 are bonded together, they can be symmetrically arranged along the bonding surface 140. The second stepped plane 112 of the first magnetic section 11 and the second stepped plane 112 of the second magnetic section 12 respectively serve as two opposing groove walls of the groove 13. The stepped side surfaces 113 of the first magnetic section 11 and the second magnetic section 12 are connected along the second direction y to form the bottom of the groove 13. For either the first magnetic section 11 or the second magnetic section 12, the height of the stepped structure (the length along the second direction y) is equal to the groove width of the groove 13. The adhesive 14 that overflows the bonding surface 140 is bonded to the second stepped plane 112 and the stepped side surfaces 113 of the first magnetic section 11, and also to the second stepped plane 112 and the stepped side surfaces 113 of the second magnetic section 12.

[0047] In other examples, both the first magnetic section 11 and the second magnetic section 12 may be provided with a stepped structure at the groove 13, but the stepped structures are not symmetrically arranged along the bonding surface 140. That is, for one of the first magnetic section 11 and the second magnetic section 12, the height difference between the first step plane 111 and the second step plane 112 is less than half the width of the groove 13 (i.e., the groove width), while for the other of the first magnetic section 11 and the second magnetic section 12, the height difference between the first step plane 111 and the second step plane 112 is greater than half the width of the groove 13, and the sum of these two height differences is equal to the groove width of the groove 13.

[0048] In another example, at the groove 13, one of the first magnetic division 11 and the second magnetic division 12 is provided with a step structure, and the step structure also includes the aforementioned first step plane 111, the second step plane 112 and the step side 113. The difference is that the first step plane 111 serves as the bonding surface 140 of the corresponding magnetic division. After the first magnetic division 11 and the second magnetic division 12 are bonded, the second step plane 112 serves as a groove wall of the groove 13, and the step side 113 serves as the groove bottom of the groove 13. The height difference between the first step plane 111 and the second step plane 112 is equal to the width of the groove 13; the other of the first magnetic division 11 and the second magnetic division 12 is a plane, that is, the step structure is not provided, and the plane serves as another groove wall of the groove 13 at the groove 13. The adhesive 14 overflowing from the bonding surface 140 is bonded to the second step plane 112 and the step side surface 113 of one of the first magnetic section 11 and the second magnetic section 12 , and is also bonded to the plane of the other one of the first magnetic section 11 and the second magnetic section 12 .

[0049] Please continue reading Figure 1 As shown, the second side 144 of the magnet 1 is provided with a second opening 148 to allow the accommodating cavity 10a to communicate with the outside world via the second opening 148. Since the second opening 148 does not require structural components such as the external terminal 3, the opening area of ​​the second opening 148 can be smaller than the opening area of ​​the first opening 147; hereby, the preset surface of the notch exposing the groove 13 can also include a portion of the second side 144 other than the second opening 148; that is, the groove 13 is also provided on or extends to the second side 144 of the magnet 1.

[0050] Optionally, the groove 13 extends to two opposite sides of the second opening 148. Preferably, the grooves 13 are symmetrically arranged on two opposite sides of the second opening 148.

[0051] The above descriptions are only some embodiments of the present application and do not limit the patent scope of the present application. For ordinary technicians in this field, any equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.

[0052] In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the corresponding embodiments, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present application.

[0053] Although the terms "first," "second," and the like are used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. In addition, the singular forms "a," "an," and "the" are intended to include the plural forms as well. The terms "or" and "and / or" are to be interpreted as inclusive, meaning any one or any combination. Exceptions to this definition occur only when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some manner.

Claims

1. An anti-overflow glue assembled electromagnetic component, characterized in that: include: The magnet comprises at least a first magnetic section and a second magnetic section, the first magnetic section and the second magnetic section being arranged opposite each other along a first direction and bonded together by adhesive to form a receiving cavity, a groove being formed at the bonding point between the first magnetic section and the second magnetic section, the groove having a depth parallel to the bonding surface of the first magnetic section and the second magnetic section, a notch of the groove being located on a predetermined surface of the magnet, the predetermined surface being perpendicular to the bonding surface, and adhesive overflowing from the bonding surface being received in the groove; a coil, disposed in the accommodating cavity; At least two external terminals are respectively connected to two opposite wire ends of the coil, and the external terminals extend out of the accommodating cavity.

2. The anti-overflow glue assembled electromagnetic component according to claim 1, characterized in that: At the groove, the first magnetic division and the second magnetic division are both provided with a step structure, the step structure including a first step plane, a second step plane and a step side surface, the first step plane and the second step plane are arranged opposite to each other along the first direction, the step side surface is connected between the first step plane and the second step plane, the first step plane serves as the bonding surface of the corresponding magnetic division, the second step plane serves as the groove wall of the groove, and the step side surface is used to form the groove bottom of the groove.

3. The anti-overflow glue assembled electromagnetic component according to claim 2, characterized in that: The first magnetic portion and the second magnetic portion are symmetrically arranged along the bonding surface.

4. The anti-overflow glue assembled electromagnetic component according to claim 2, characterized in that: For one of the first magnetic section and the second magnetic section, the height difference between the first step plane and the second step plane is less than half the width of the groove, and for the other of the first magnetic section and the second magnetic section, the height difference between the first step plane and the second step plane is greater than half the width of the groove.

5. The anti-overflow glue assembled electromagnetic component according to claim 1, characterized in that: At the groove, one of the first magnetic section and the second magnetic section is provided with a step structure, the step structure including a first step plane, a second step plane, and a step side surface, the first step plane and the second step plane being arranged opposite to each other along the first direction, the step side surface being connected between the first step plane and the second step plane, the first step plane serving as a bonding surface for the corresponding magnetic section, the second step plane serving as a groove wall of the groove, the step side surface serving as a groove bottom of the groove, and a height difference between the first step plane and the second step plane being equal to a width of the groove; The other of the first magnetic portion and the second magnetic portion is a plane and serves as another groove wall of the groove at the groove.

6. The anti-overflow glue assembled electromagnetic component according to any one of claims 1 to 5, characterized in that: The magnet includes a first surface, a second surface and four side surfaces, the first surface and the second surface are arranged opposite to each other along the first direction, and the four side surfaces are connected end to end between the first surface and the second surface in sequence, the preset surface includes two side surfaces arranged opposite to each other along a direction parallel to the groove depth, and one of the remaining two side surfaces is provided with a first opening to allow the accommodating cavity to communicate with the outside world through the first opening, and the at least two external terminals extend out of the accommodating cavity through the first opening.

7. The anti-overflow glue assembled electromagnetic component according to claim 6, characterized in that: The other of the remaining two side surfaces is provided with a second opening to allow the accommodating cavity to communicate with the outside world via the second opening, and the opening area of ​​the second opening is smaller than the opening area of ​​the first opening; the preset surface also includes the portion of the other of the remaining two side surfaces other than the second opening.

8. The anti-overflow glue assembled electromagnetic component according to claim 7, characterized in that: The groove extends to opposite sides of the second opening.

9. The anti-overflow glue assembled electromagnetic component according to claim 8, characterized in that: The grooves are symmetrically arranged on opposite sides of the second opening.

10. The anti-overflow glue assembled electromagnetic component according to claim 1, characterized in that: At least one of the first magnetic section and the second magnetic section is provided with a convex column. When the first magnetic section and the second magnetic section are bonded together by adhesive, the convex column is located in the accommodating cavity and serves as the magnetic center column of the magnet. The coil is wound around the magnetic center column.

Images