Electromagnetic device

Abstract

The invention provides an electromagnetic device, which comprises a skeleton, one side of a lower stop of the skeleton is provided with a bump, and the bump comprises a first surface and a second surface which are oppositely arranged, and a third surface which is vertically connected between the two surfaces; the at least one pair of pins comprises a first part, a second part and a third part which are vertically connected in pairs, the first part extends out of the bump through the second surface from the interior of the bump, and the second part extends out of the bump through the third surface from the interior of the bump; the coil is formed by winding a wire, the coil is wound on the cylinder and extends to the first surface of the bump, a first leading-out part of the wire is connected with the second part of one pin, and a second leading-out part of the wire is connected with the second part of the other pin. The large winding space and the small framework wall thickness can be achieved at the same time, the two lead-out parts of the wire are designed on different planes, and cross contact of the lead-out parts of the wire can be prevented.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic devices, and in particular to an electromagnetic device. Background Art

[0002] Electromagnetic devices represented by inductors and transformers mainly include a skeleton, a coil and pins. The coil is wound on the skeleton, which is usually injection-molded from special plastics. The skeleton provides support for the orderly winding arrangement of the coil. The pins are generally buried in the skeleton during injection molding and are electrically connected to the lead-out part of the coil's wire. In order to reduce the risk of short circuit, the pins are usually set outside the area where the coil is located.

[0003] As the market demands for miniaturization of electronic components become higher and higher, in order to meet the electrical performance and reliability requirements of the product, the coils of electromagnetic devices need to arrange more turns in a smaller space, that is, to ensure sufficient winding space, resulting in less space reserved for the pins on the frame. Figure 1 In the shown conventional electromagnetic device, the pin 300 is L-shaped, the vertical portion of the pin 300 is buried in the side wall of the skeleton 100 and extends outside the side wall, the horizontal portion of the pin 300 is connected to the vertical portion exposed outside the skeleton 100, and the wall thickness of the skeleton 100 is obviously limited. Usually, the side wall thickness M0 outside the vertical portion of the pin 300 must satisfy M0 ≥ 0.4 mm, so that the vertical portion of the pin 300 can obtain sufficient support from the skeleton 100 to ensure that the entire pin 300 will not fall off. In other words, under the premise that the size of the entire electromagnetic device remains unchanged, if the side wall thickness M0 of the skeleton 100 is large, the winding space needs to be reduced, and the number of turns of the coil 200 is reduced, which will make it difficult for the product's electrical performance and reliability to meet the requirements. It can be seen that it is difficult for existing electromagnetic devices to simultaneously achieve a larger winding space and a smaller skeleton wall thickness. Summary of the invention

[0004] In view of this, the present application provides an electromagnetic device that can improve the problem that it is difficult for the electromagnetic device to simultaneously achieve a larger winding space and a smaller frame wall thickness.

[0005] The present application provides an electromagnetic device, comprising:

[0006] The frame comprises a column and an upper block and a lower block respectively arranged at two ends of the column, a convex block is arranged on one side of the lower block, and the convex block comprises a first surface and a second surface arranged opposite to each other, and a third surface vertically connected between the first surface and the second surface;

[0007] At least one pair of pins, each pin comprising a first portion, a second portion and a third portion which are vertically connected in pairs, the first portion extending from the inside of the bump via the second surface to the outside of the bump, and the second portion extending from the inside of the bump via the third surface to the outside of the bump;

[0008] A coil wound by a wire, the coil is wound around the column and extends to the first surface of the bump, the first lead portion of the wire is connected to the second portion of one of the pins of any pair of pins, and the second lead portion of the wire is connected to the second portion of the other pin of any pair of pins.

[0009] Optionally, the first end of the third part of one of the pins is arranged opposite to the second end of the third part of the other pin, the first end of the first part of one of the pins is connected to the first end of the third part, the first end of the second part of one of the pins is connected to the second end of the third part, and the first end of the first part and the first end of the second part of the other pin are both connected to the first end of the third part.

[0010] Optionally, the third parts of any pair of pins are arranged relatively to each other and are completely buried in the bump.

[0011] Optionally, the first surface includes a first sub-surface and a second sub-surface, the first sub-surface is flush with the upper surface of the lower block, the second sub-surface is connected to the first sub-surface and is inclined downward in a direction toward the column, the first lead-out portion of the wire spans the second sub-surface and is wound around one of the pins via the first sub-surface, and the second lead-out portion of the wire is directly wound around another pin via the second sub-surface.

[0012] Optionally, the bump further includes a fourth surface and a fifth surface, the fourth surface and the fifth surface are both connected between the first surface and the second surface, and are both perpendicularly connected to the third surface, the bump further includes a first stopper protruding from the fourth surface and a second stopper protruding from the fifth surface, the lower surface of the first stopper is lower than the second portion of one of the pins, and the lower surface of the second stopper is lower than the second portion of the other pin;

[0013] The first lead-out portion of the wire extends to the third surface via the first sub-surface and the fourth surface in sequence and is wound around one of the pins, and the lower surface of the first stopper abuts against the first lead-out portion;

[0014] The second lead-out portion of the wire extends to the third surface via the second sub-surface and the fifth surface in sequence and is wound around the other pin, and the lower surface of the second stopper abuts against the second lead-out portion.

[0015] Optionally, the lower surface of the first stopper and the lower surface of the second stopper are both arc-shaped surfaces.

[0016] Optionally, along a direction perpendicular to the upper block and the lower block, an orthographic projection of the first block is located within an orthographic projection of the lower block.

[0017] Optionally, the angle between the first sub-surface and the second sub-surface is an obtuse angle.

[0018] Optionally, the lower block is provided with a groove, the depth direction of the groove is parallel to the first partial surface, and the protrusion is located in the groove; the coil is only in contact with the first partial surface.

[0019] Optionally, the column includes a first column wall and a second column wall that are arranged opposite to each other and are both perpendicular to the third surface, the protrusion is adjacent to the first column wall, one side of the first column wall and the second column wall are connected through the bottom of the groove, the first lead-out portion of the wire is led out from the side of the first column wall facing away from the second column wall, and the second lead-out portion of the wire is led out from the second column wall and extends toward the first sub-surface of the protrusion.

[0020] Optionally, along a direction perpendicular to the upper block and the lower block, an orthographic projection distance between the other side of the first column wall and the second column wall and a corresponding side edge of the lower block is smaller than an orthographic projection distance between any other side and a corresponding side edge of the lower block.

[0021] As described above, in the electromagnetic device of the present application, each pin includes a first part, a second part and a third part that are vertically connected in pairs, the first part extends from the inside of the bump through the second surface to the outside of the bump, and the second part extends from the inside of the bump through the third surface to the outside of the bump. Here, these three parts can make each pin subject to resistance from the three-dimensional plane of the bump, and each pin is subject to greater resistance, so a smaller skeleton wall thickness (i.e., the thickness of the bump outside the first part and the third part) can be used to ensure that the pin will not fall off. In other words, under the premise that the size of the entire electromagnetic device remains unchanged, if the skeleton thickness becomes smaller, the winding space will increase, and the number of turns of the coil will increase, thereby ensuring the electrical performance and reliability of the product. It can be seen that the electromagnetic device of the present application can simultaneously achieve a larger winding space and a smaller skeleton wall thickness.

[0022] In addition, the first surface of the protrusion includes a first sub-surface and a second sub-surface, the first sub-surface is flush with the upper surface of the lower block, the second sub-surface is connected to the first sub-surface and is inclined downward in the direction toward the column, the first lead-out portion of the wire spans the second sub-surface and is wound around one of the pins via the first sub-surface, and the second lead-out portion of the wire is directly wound around the other pin via the second sub-surface. Here, by designing the two lead-out portions of the wire in different planes, cross-contact of the lead-out portions of the wire can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an electromagnetic device in the prior art;

[0024] Figure 2 is a stereoscopic diagram of an electromagnetic device in a first viewing angle according to an embodiment of the present application;

[0025] Figure 3 yes Figure 2 A side view of the electromagnetic device shown;

[0026] Figure 4 yes Figure 2 A stereoscopic view of the electromagnetic device shown in a second perspective;

[0027] Figure 5 yes Figure 2 An enlarged view of the structure of a dotted line selected area A of the electromagnetic device shown;

[0028] Figure 6 yes Figure 2 A top view of the electromagnetic device shown;

[0029] Figure 7 yes Figure 2 A bottom view of the electromagnetic device shown;

[0030] Figure 8 yes Figure 2 A three-dimensional view of the skeleton of the electromagnetic device shown;

[0031] Fig. 9 yes Figure 2 A side view of the skeleton of the electromagnetic device shown;

[0032] Fig.10 and Fig.11 yes Figure 2 A perspective view of two pins of an electromagnetic device is shown.

[0033] Frame 100, coil 200, pin 300;

[0034] The first direction is x, the second direction is y, and the third direction is z;

[0035] Framework 1, mounting window 10, column 11, first column wall 111, second column wall 112, upper stop 12, lower stop 13, groove 130, protrusion 14, first surface 141, second surface 142, third surface 143, fourth surface 144, fifth surface 145, first sub-surface 146, second sub-surface 147, first stopper 148, second stopper 149;

[0036] Coil 2, first lead-out portion 21, second lead-out portion 22;

[0037] Pin 3, first pin 3a, second pin 3b;

[0038] The first part 31 , the second part 32 , and the third part 33 . DETAILED DESCRIPTION

[0039] In order to solve the above-mentioned technical problems existing in the prior art, in the electromagnetic device of the present application, each pin includes a first part, a second part and a third part which are vertically connected in pairs, the first part extends from the inside of the bump through the second surface to the outside of the bump, and the second part extends from the inside of the bump through the third surface to the outside of the bump. Here, these three parts can make each pin subject to resistance from the three-dimensional plane of the bump, and each pin is subject to greater resistance. Therefore, a smaller skeleton wall thickness (i.e., the thickness of the bump outside the first part and the third part) can be used to ensure that the pin will not fall off. In other words, under the premise that the size of the entire electromagnetic device remains unchanged, if the skeleton thickness becomes smaller, the winding space will increase and the number of turns of the coil will increase, thereby ensuring the electrical performance and reliability of the product.

[0040] In addition, the first surface of the protrusion includes a first sub-surface and a second sub-surface, the first sub-surface is flush with the upper surface of the lower block, the second sub-surface is connected to the first sub-surface and is inclined downward in the direction toward the column, the first lead-out portion of the wire spans the second sub-surface and is wound around one of the pins via the first sub-surface, and the second lead-out portion of the wire is directly wound around the other pin via the second sub-surface. Here, by designing the two lead-out portions of the wire in different planes, cross-contact of the lead-out portions of the wire can be prevented.

[0041] The specific form of the parameters such as shape, quantity, size, etc. of any of the skeleton, pins and bumps can be determined according to the adaptability required by the actual scenario, and this application does not limit it.

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. In the absence of conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of the present application.

[0043] In the description of the embodiments of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the corresponding embodiments, rather than indicating or implying that a 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.

[0044] Please also read Figures 2 to 11 As shown, the electromagnetic device of this example includes a skeleton 1, a coil 2 and at least one pair of pins 3. The number of the pins 3 can be determined according to the adaptability of the number of coils 2. This application only describes and illustrates an electromagnetic device provided with a coil 2 as an example. The coil 2 is wound by a wire, so the coil 2 is provided with two wire lead-out parts, respectively referred to as the first lead-out part and 21 and the second lead-out part and 22. Correspondingly, the electromagnetic device is provided with only one pair of pins 3, the first lead-out part 21 is connected to one of the pins 3 of the pair of pins 3, and the second lead-out part 22 is connected to the other pin 3 of the pair of pins 3. In other examples, the electromagnetic device can be provided with any number of two or more coils 2. Taking three coils 2 as an example, a total of six wire lead-out parts are included, namely three first lead-out parts and 21 and three second lead-out parts and 22, and three pairs of pins 3 can be provided accordingly.

[0045] For ease of description and understanding, combined with the placement orientation in the figure, the width direction of the electromagnetic device is called the first direction x, the height direction is called the second direction y, and the thickness direction is called 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 the three-dimensional rectangular coordinate system. It should be understood that the so-called verticality in the whole application does not require that the angle between the two must be 90°, but allows a deviation of, for example, ±10°, that is, the so-called verticality can be understood as the angle between any two directions is 80° to 100°. Similarly, the so-called parallelism in the whole application does not require that the angle between the two must be 0° or 180°, but allows a deviation of, for example, ±10°, that is, the so-called parallelism can be understood as the angle between any two directions is 0° to 10° or 170° to 190°.

[0046] The frame 1 includes a column 11, an upper block 12 and a lower block 13, and the upper block 12 and the lower block 13 are respectively arranged at the upper end and the lower end of the column 11. The column 11, the upper block 12 and the lower block 13 can be provided with windows connected along the second direction y, so as to form an installation window 10 of the frame 1, so that the columnar element of the preset device can be inserted into the installation window 10, and the frame 1 can be installed in the preset device. The specific form of the preset device is not limited in this application.

[0047] A protrusion 14 is provided on one side of the lower block 13. The protrusion 14 is a block-shaped structural member protruding from the main body of the lower block 13 in the opposite direction of the third direction z. In actual scenarios, the protrusion 14 and the main body of the lower block 13 can be integrally injection molded, and the skeleton 1 includes but is not limited to a plastic skeleton.

[0048] The protrusion 14 includes a first surface 141, a second surface 142, a third surface 143, a fourth surface 144 and a fifth surface 145. The second surface 142 and the first surface 141 are arranged opposite to each other along the second direction y, the thickness of the protrusion 14 can be equal to the thickness of the lower block 13, the second surface 142 and the lower surface of the lower block 13 can be flush, the third surface 143 is vertically connected between the first surface 141 and the second surface 142, the fifth surface 145 and the fourth surface 144 are arranged opposite to each other along the first direction x, and both are connected between the first surface 141 and the second surface 142, and both are vertically connected to the third surface 143. Figure 1 In the placement orientation shown in , the first surface 141 can be regarded as the upper surface of the bump 14, the second surface 142 can be regarded as the lower surface of the bump 14, the third surface 143 can be regarded as the outer side surface of the bump 14, the fifth surface 145 can be regarded as the left side surface of the bump 14, and the fourth surface 144 can be regarded as the right side surface of the bump 14.

[0049] Combination Fig.10 and Fig.11 As shown, each pin 3 includes a first part 31, a second part 32 and a third part 33 connected vertically in pairs, and the three parts can be arranged in a strip shape, the first part 31 extends along the second direction y, the second part 32 extends along the third direction z, and the third part 33 extends along the first direction x. Figure 1As shown, the first portion 31 of each pin 3 extends from the inside of the bump 14 through the second surface 142 to the outside of the bump 14, and the second portion 32 of each pin 3 extends from the inside of the bump 14 through the third surface 143 to the outside of the bump 14, and the third portions 33 of any pair of pins 3 are relatively arranged along the first direction x, and are completely buried in the bump 14. In other examples, the third portions 33 of any pair of pins 3 may not be relatively arranged along the first direction x, for example, they may be staggered, and the third portions 33 may also be partially (for example, the portion connected to the first portion 31 and the second portion 32) buried in the bump 14, and the other portions may extend out of the bump 14.

[0050] The coil 2 can be formed by winding a wire of the type of enameled wire (such as enameled copper wire) in turns, and a single coil 2 can be wound by a single wire, and the specific winding method depends on adaptability. The coil 2 is wound on the column 11 of the frame 1 and extends to the first surface 141 of the protrusion 14. It can be understood that: the coil 2 has a certain thickness, and it has a certain thickness on the side of the column 11 facing the protrusion 14. Here, along the line of sight of the second direction y, the orthographic projection of the side of the coil 2 adjacent to the protrusion 14 falls into the first surface 141 of the protrusion 14, but does not extend outside the protrusion 14.

[0051] The first lead-out portion 21 of the wire is connected to the second portion 32 of one pin (hereinafter referred to as the "first pin") 3a of any pair of pins 3, and the second lead-out portion 22 of the wire is connected to the second portion 32 of the other pin (hereinafter referred to as the "second pin") 3b of any pair of pins 3. The connection between each lead-out portion and the corresponding pin 3 can be winding, and further welding can be performed after winding. The first portion 31 of each pin 3 can be electrically connected to a device such as a circuit board.

[0052] For any pin 3, a part of the first part 31 and the second part 32 is buried in the bump 14, and the third part 33 is completely buried in the bump 14. Here, these three parts can make each pin 3 subject to resistance from the three-dimensional plane of the bump 14, that is, resistance from the xy plane, the xz plane and the yz plane. The resistance to each pin 3 is relatively large, so the smaller skeleton wall thickness M1 can be used to ensure that the pin 3 will not fall off from the skeleton 1 and its bump 14. The so-called skeleton wall thickness M1 refers to: the thickness M1 of the bump 14 outside the first part 31 and the third part 33, that is, the minimum distance between the first part 31 and the third part 33 and the third surface 143 along the third direction z. Under the premise that the length, width and height dimensions of the entire electromagnetic device remain unchanged, if the skeleton wall thickness M1 becomes smaller, the winding space will increase, and the number of turns of the coil 2 will increase, thereby ensuring the electrical performance and reliability of the product. It can be seen that the electromagnetic device of the present application can simultaneously achieve a larger winding space and a smaller skeleton wall thickness.

[0053] In actual scenarios, the minimum wall thickness M1 of the skeleton can be 0.2 mm, which is equivalent to moving pin 3 outward by 0.2 mm in the opposite direction of the third direction z. The increased number of winding layers S ≥ (M1-0.2) / D, where D is the wire diameter of the wire.

[0054] Please continue reading Fig.10 and Fig.11 , the first end of the third part 33 of the first pin 3a and the second end of the third part 33 of the second pin 3b are arranged opposite to each other along the first direction x, the first end of the first part 31 of the first pin 3a is connected to the first end of the third part 33 thereof, the first end of the second part 32 of the first pin 3a is connected to the second end of the third part 33 thereof, and the first end of the first part 31 and the first end of the second part 32 of the second pin 3b are both connected to the first end of the third part 33 thereof. Here, the distance between the second part 32 of the first pin 3a and the second part 32 of the second pin 3b along the first direction z is relatively large, which can avoid the short circuit of the wires wound on the two and can also be beneficial to the mutual influence of the welding high temperature.

[0055] Please combine Figures 2 to 5 , Figure 8 , Fig. 9 As shown, the first surface 141 of the protrusion 14 is not a plane, but includes a first sub-surface 146 and a second sub-surface 147. The first sub-surface 146 is flush with the upper surface of the lower block 13 and can be regarded as an extension of the upper surface of the lower block 13. The second sub-surface 147 is connected to the first sub-surface 146 and is inclined downward in the direction toward the column 11. In the orientation shown in the figure, the second sub-surface 147 is a surface with a lower left side and a higher right side, so that the first sub-surface 146 is higher than the second sub-surface 147. The first lead-out portion 21 of the wire crosses the second sub-surface 147 and is wound around the first pin 3a via the first sub-surface 146, and the second lead-out portion 22 of the wire is directly wound around the second pin 3b via the second sub-surface 147. In this regard, the present application can design the first lead-out portion 21 and the second lead-out portion 22 of the wire in different planes, so as to prevent the two lead-out portions of the wire from cross-contacting, thereby reducing the risk of short circuit caused by the cross-contact of the two lead-out portions.

[0056] It should be noted that, along the line of sight of the second direction y, the orthographic projections of the first lead portion 21 and the second lead portion 22 intersect, but in an actual scenario, the two are not in contact. Instead, compared to the first contact point between the second lead portion 22 and the second sub-surface 147, the first contact point between the first lead portion 21 and the first sub-surface 146 is closer to the third surface 143 of the bump 14. Here, in the intersection area of ​​the orthographic projections of the first lead portion 21 and the second lead portion 22, the first lead portion 21 is located above the second lead portion 22.

[0057] The protrusion 14 may further include a first stopper 148 and a second stopper 149. The first stopper 148 protrudes from the fourth surface 144 along the first direction x, and along the direction perpendicular to the upper stopper 12 and the lower stopper 13, that is, along the opposite direction of the second direction y, the orthographic projection of the first stopper 148 is located within the orthographic projection of the lower stopper 13, that is, the first stopper 148 does not protrude from the corresponding side surface of the lower stopper 13, which is conducive to controlling the width and thickness of the entire electromagnetic device to be limited only by the upper stopper 12 and the lower stopper 13. Optionally, the outer side edge of the first stopper 148 has the same curvature as the corresponding side surface of the lower stopper 13. The second stopper 149 protrudes from the fifth surface 145 along the opposite direction of the first direction x. The lower surface of the first stopper 148 is lower than the second end of the second portion 32 of the first pin 3a, and the lower surface of the second stopper 149 is lower than the second end of the second portion 32 of the second pin 3b.

[0058] The first lead-out portion 21 of the wire extends to the third surface 143 via the first sub-surface 146 and the fourth surface 144 in sequence, and is wound around the second portion 32 of the first pin 3a. The lower surface of the first stopper 148 abuts against the first lead-out portion 21, thereby providing a downward force for the first lead-out portion 21 and changing the extension direction of the first lead-out portion 21, thereby improving the stability of the first lead-out portion 21 wound around the first pin 3a.

[0059] The second lead-out portion 22 of the wire extends to the third surface 143 via the second sub-surface 147 and the fifth surface 145 in sequence, and is wound around the second portion 32 of the second pin 3b. The lower surface of the second stopper 149 abuts against the second lead-out portion 22, thereby providing a downward force for the second lead-out portion 22 and changing the extension direction of the second lead-out portion 22, thereby improving the stability of the second lead-out portion 22 wound around the second pin 3b.

[0060] Optionally, the connection between the second sub-surface 147 and the fifth surface 145 (i.e., the angle here) is an arc angle, the connection between the first sub-surface 146 and the fourth surface 144 (i.e., the angle here) is an arc angle, and the angle θ between the first sub-surface 146 and the second sub-surface 147 is an arc angle, and is an obtuse angle, preferably, θ<176°. The arc angle setting can prevent the corresponding lead-out portion from having an excessively large bending angle at the arc angle, thereby ensuring that the corresponding lead-out portion will not be damaged.

[0061] Optionally, the lower surface of the first stopper 148 and the lower surface of the second stopper 149 are both arc-shaped surfaces, that is, the lower surfaces of the two are both designed to be arc-shaped, which can avoid excessive bending angles of the corresponding lead-out parts, thereby ensuring that the corresponding lead-out parts will not be damaged.

[0062] Please continue reading Figure 2The lower block 13 may be provided with a groove 130, the depth direction of the groove 130 is parallel to the first sub-surface 146, that is, the third direction z, and the protrusion 14 is located in the groove 130; the coil 2 only contacts the first sub-surface 146, but may not contact the second sub-surface 147, and is only arranged directly above the second sub-surface 147. The arrangement of the groove 130 can accommodate the length of the protrusion 14 protruding from the lower block 13, so that the length of the entire lower block 13 along the third direction z is not too large, which is conducive to controlling the size of the entire electromagnetic device, and does not affect the winding of the coil 2.

[0063] like Figure 8 and Fig. 9 As shown, the column 11 includes a first column wall 111 and a second column wall 112, the second column wall 112 and the first column wall 111 are arranged opposite to each other along the first direction x, and are both perpendicular to the third surface 143 of the protrusion 14. The first column wall 111 and the second column wall 112 are respectively wall-like structures, which are arranged opposite to each other and connected by an upper stop 12 and a lower stop 13, so as to form a hollow column 11 with a front and rear air-avoiding design. The protrusion 14 is adjacent to the first column wall 111, and one side of the first column wall 111 and the second column wall 112 (i.e., the side facing the protrusion 14) are connected through the bottom of the groove 130, the first lead-out portion 21 of the wire is led out from the side of the first column wall 111 facing away from the second column wall 112, which can be regarded as from the outside of the first column wall 111, and the second lead-out portion 22 of the wire is led out from the second column wall 112 and extends toward the first sub-surface 146 of the protrusion 14.

[0064] One side of the first column wall 111 and the second column wall 112 may be an arc-shaped corner. Here, the four edges of the column 11 are all arc-shaped edges, which can prevent the bending angle of the wire of the coil 2 from being too large when it is wound to the corresponding edge, thereby ensuring that the wire of the coil 2 will not be damaged.

[0065] Along the second direction y, the orthographic projection distance between the other side of the first column wall 111 and the second column wall 112 (i.e., the side facing away from the protrusion 14) and the corresponding side of the lower stop 13 is smaller than the orthographic projection distance between any other side of the column 11 and the corresponding side of the lower stop 13. Here, the distance between the side of the column 11 facing away from the protrusion 14 and the corresponding side of the lower stop 13 is the smallest. Compared with the column 11 formed by the traditional four column walls, the column 11 of the present application can be regarded as omitting two column walls arranged opposite to each other along the third direction z. Taking the example that the thickness of each column wall is equal and is T, the present application can save a column wall space with a thickness of T on the side facing away from the protrusion 14, and the winding space can be increased from the previous N to N+T, where N is the distance between the side of the column 11 formed by the traditional four column walls facing away from the protrusion 14 and the corresponding side of the lower stop 13. On the basis that the skeleton wall thickness M1 can be achieved at a minimum of 0.2 mm, the number of winding layers increased by the coil 2 is at least T / D+(M1-0.2) / D.

[0066] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. For ordinary technicians in this field, all equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.

[0067] Although the terms "first, second", etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. In addition, the singular forms "one", "an", and "the" are intended to include plural forms as well. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way, an exception to this definition will occur.

Claims

1. An electromagnetic device, characterized in that: include: The frame comprises a column and an upper block and a lower block respectively arranged at two ends of the column, a convex block is arranged on one side of the lower block, and the convex block comprises a first surface and a second surface arranged opposite to each other, and a third surface vertically connected between the first surface and the second surface; At least one pair of pins, each pin comprising a first portion, a second portion and a third portion which are vertically connected in pairs, the first portion extending from the inside of the bump via the second surface to the outside of the bump, and the second portion extending from the inside of the bump via the third surface to the outside of the bump; A coil wound by a wire, the coil is wound around the column and extends to the first surface of the bump, the first lead portion of the wire is connected to the second portion of one of the pins of any pair of pins, and the second lead portion of the wire is connected to the second portion of the other pin of any pair of pins.

2. The electromagnetic device according to claim 1, characterized in that: The first end of the third part of one of the pins is arranged opposite to the second end of the third part of the other pin, the first end of the first part of one of the pins is connected to the first end of the third part, the first end of the second part of one of the pins is connected to the second end of the third part, and the first end of the first part and the first end of the second part of the other pin are both connected to the first end of the third part.

3. The electromagnetic device according to claim 2, characterized in that: The third parts of any pair of pins are arranged relatively to each other and are completely buried in the bump.

4. The electromagnetic device according to any one of claims 1 to 3, characterized in that: The first surface includes a first sub-surface and a second sub-surface, the first sub-surface is flush with the upper surface of the lower block, the second sub-surface is connected to the first sub-surface and is inclined downward in a direction toward the column, the first lead-out portion of the wire spans the second sub-surface and is wound around one of the pins via the first sub-surface, and the second lead-out portion of the wire is directly wound around another pin via the second sub-surface.

5. The electromagnetic device according to claim 4, characterized in that: The bump further includes a fourth surface and a fifth surface, both of which are connected between the first surface and the second surface and are vertically connected to the third surface, and the bump further includes a first stopper protruding from the fourth surface and a second stopper protruding from the fifth surface, the lower surface of the first stopper is lower than the second portion of one of the pins, and the lower surface of the second stopper is lower than the second portion of the other pin; The first lead-out portion of the wire extends to the third surface via the first sub-surface and the fourth surface in sequence and is wound around one of the pins, and the lower surface of the first stopper abuts against the first lead-out portion; The second lead-out portion of the wire extends to the third surface via the second sub-surface and the fifth surface in sequence and is wound around the other pin, and the lower surface of the second stopper abuts against the second lead-out portion.

6. The electromagnetic device according to claim 5, characterized in that: Along a direction perpendicular to the upper block and the lower block, an orthographic projection of the first block is located within an orthographic projection of the lower block.

7. The electromagnetic device according to claim 4, characterized in that: The included angle between the first sub-surface and the second sub-surface is an obtuse angle.

8. The electromagnetic device according to claim 4, characterized in that: The lower block is provided with a groove, the depth direction of the groove is parallel to the first partial surface, the protrusion is located in the groove; the coil is only in contact with the first partial surface.

9. The electromagnetic device according to claim 8, characterized in that: The column includes a first column wall and a second column wall which are arranged opposite to each other and are both perpendicular to the third surface. The protrusion is adjacent to the first column wall. One side of the first column wall and the second column wall are connected through the bottom of the groove. The first lead-out portion of the wire is led out from the side of the first column wall facing away from the second column wall. The second lead-out portion of the wire is led out from the second column wall and extends toward the first partial surface of the protrusion.

10. The electromagnetic device according to claim 9, characterized in that Along the direction perpendicular to the upper block and the lower block, the orthographic projection distance between the other side of the first column wall and the second column wall and the corresponding side of the lower block is smaller than the orthographic projection distance between any other side and the corresponding side of the lower block.

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