Side lead type magnetic device

Abstract

The utility model provides a side lead type magnetic device. The side lead type magnetic device comprises a magnet, a winding, a shell and a plurality of terminals. The shell is provided with a wire protection groove and a bearing platform outside the accommodating cavity; each terminal extends into the bearing platform of the shell, one end of each terminal extends out of the platform surface of the bearing platform and is lower than the top wall of the shell, the other end of each terminal is exposed out of the bottom surface of the bearing platform, and a lead of the winding extends to the platform surface of the bearing platform through a wire outlet groove in the bottom of the shell and a wire protection groove in the outer side of the shell in sequence and is electrically connected with the corresponding terminal. Therefore, the electric connection position of the lead end part of the winding and the terminal is far away from the coil body of the winding, so that the risk that a paint film of the terminal is burnt back and intrudes into the coil body can be reduced, and the problem of poor insulation and voltage resistance of the coil body caused by burn-back can be improved; in addition, the electric connection position of the lead end part of the winding and the terminal is positioned on the outer side of the shell, so that the appearance quality control on the electric connection effect of the position is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of magnetic devices, in particular to a side lead magnetic device. BACKGROUND

[0002] With the rapid development of technology, especially the emergence of multifunctional devices, the demand for passive devices is increasing, and as one of the passive components, magnetic devices have been widely used. The magnetic device at least includes a magnet, a winding and a terminal (also known as "external terminal", "external electrode", "end electrode"), the terminal mainly undertakes two functions, one is as a wiring part, electrically connected with the lead of the winding, and the other is as an electrode, electrically connected with a circuit board (for example, PCB, which stands for Printed Circuit Board).

[0003] The terminal needs to be attached to the circuit board, so it is usually arranged at the bottom of the magnetic device. In the existing magnetic device, the lead of the winding extends from the inside of the magnetic device to the bottom of the magnetic device and is electrically connected with the terminal thereof, which causes the distance between the end of the lead of the winding and the winding to be close. When the terminal is immersed in tin and demasked, the paint film of the lead is easy to backfire into the coil body of the winding, resulting in poor insulation and voltage resistance of the coil body. In addition, the electrically connected position of the lead and the terminal is located at the bottom of the magnetic device, and is usually shielded by a shell or other structural member, so that it is difficult to control the appearance quality of the electrically connected effect at this position. CONTENT OF THE UTILITY MODEL

[0004] In view of this, the present application provides a side lead magnetic device, which can improve the problem that the backfire of the paint film during the immersion of the terminal in tin and demasking causes poor insulation and voltage resistance of the winding, and the electrically connected effect of the lead and the terminal is difficult to control the appearance quality.

[0005] The side lead magnetic device provided by the present application comprises:

[0006] a magnet;

[0007] a winding wound on the magnet to form a magnetic circuit;

[0008] a shell provided with a receiving cavity, a lead outlet slot, a lead protection slot and two supporting platforms, the magnet and the winding are arranged in the receiving cavity, the top of the receiving cavity is closed by the top wall of the shell, the lead outlet slot is arranged at the bottom of the cavity wall of the receiving cavity, two supporting platforms are arranged at the periphery of the receiving cavity and are oppositely arranged along a first direction, the platform surface of the supporting platform is lower than the top wall of the shell along a second direction, and the end of each supporting platform extends beyond the cavity wall of the receiving cavity along a third direction, the lead protection slot is formed by the combination of the supporting platform and the cavity wall of the receiving cavity, and is in communication with the lead outlet slot;

[0009] A plurality of terminals, each of which extends into the platform and has one end extending out of the top surface of the platform and below the top wall of the shell and the other end exposed on the bottom surface of the platform; the lead of the winding extends to the top surface of the platform through the wire outlet slot and the wire protection slot in sequence and is electrically connected to the corresponding terminal.

[0010] Optionally, the winding comprises two coils oppositely arranged along the first direction; the magnetic device further comprises an insulating partition plate arranged between the two coils.

[0011] Optionally, the magnetic device further comprises a protective sheet made of insulating material, which is arranged at the bottom of the shell and closes the opening at the bottom of the accommodation cavity to shield the coils of the winding.

[0012] Optionally, the magnetic device is provided with a gel on one side corresponding to the top wall of the shell, which adheres and fixes the coils of the winding and the insulating partition plate in the accommodation cavity.

[0013] Optionally, the terminal comprises at least one main body part, a wiring part and an external connecting part; the main body part extends into the platform, and each of the main body parts is provided with a plurality of outward protruding protrusions on at least one side, and the protrusions and the corresponding side of the main body part form an introduction angle and a anti-extraction angle, and along the opposite direction of the second direction, the introduction angle is acute, and the anti-extraction angle cooperates with the platform to block the movement of the main body part along the second direction; the wiring part is arranged at one end of one of the main body parts and is electrically connected to the lead of the winding; the external connecting part is arranged at one end of one of the main body parts and is used for electrical connection with the circuit board.

[0014] Optionally, the terminal comprises at least one main body part, a wiring part, an external connecting part and an extension part; the main body part extends into the platform; the wiring part is arranged at one end of one of the main body parts and is electrically connected to the lead of the winding; the external connecting part is arranged at one end of one of the main body parts and is used for electrical connection with the circuit board; one end of the extension part is arranged on one side of the external connecting part, and the other end of the extension part is exposed and attached to the side surface of the platform along the second direction after being bent.

[0015] Optionally, the extension part comprises a first part and a second part, the first part is arranged in the same layer as the outer connecting part, the first part comprises a first sub-part and a second sub-part, and is sequentially connected between the outer connecting part and the second part, the thickness of the first sub-part is greater than the thickness of the second sub-part; the second part is perpendicular to the second sub-part, and the thickness of the second part and the thickness of the second sub-part are both less than the thickness of the outer connecting part or the first sub-part, the second part extends along the extension direction of the main body part and is perpendicular to the main body part, and is exposed and attached to the side of the supporting platform away from the wire protection groove.

[0016] Optionally, the outer connecting part is located at the other end of the corresponding terminal and extends out of the bottom surface of the supporting platform, and the extension direction of the outer connecting part is the same as that of the corresponding main body part and both are located in the same plane.

[0017] Optionally, each of the terminals comprises a first main body part and a second main body part arranged oppositely; the outer connecting part is arranged at the first end of the first main body part and the first end of the second main body part, and is perpendicular to the extension direction of the first main body part and the second main body part; the outer connecting part connects the first main body part and the second main body part, and is exposed and attached to the bottom surface of the supporting platform.

[0018] Optionally, the wire connecting part is arranged at the second end of the first main body part; the height of the first main body part is greater than the height of the second main body part, the wire connecting part is exposed to the supporting platform, and the second end of the second main body part is not exposed to the supporting platform.

[0019] As described above, in the side lead magnetic device of the present application, each terminal extends into the supporting platform of the shell, and one end extends out of the platform surface of the supporting platform and is lower than the top wall of the shell, and the other end is exposed to the bottom surface of the supporting platform, the lead of the winding extends to the platform surface of the supporting platform via the wire outlet groove of the bottom of the shell and the wire protection groove outside the shell in sequence, and is electrically connected with the corresponding terminal. Here, the electrical connection position of the lead end of the winding and the terminal is away from the coil body of the winding, which can reduce the risk of invasion of the terminal paint film re-burning into the coil body, thereby improving the problem of poor insulation voltage resistance of the coil body caused thereby; in addition, the electrical connection position of the lead end of the winding and the terminal is located outside the shell, which is conducive to the appearance quality control of the electrical connection effect of this position. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 and Figure 2 are the perspective structural schematic diagrams of two views of a first magnetic device of the first embodiment of the present application;

[0021] Figure 3 is Figure 1 and Figure 2 is the structural explosion schematic diagram of the magnetic device shown in

[0022] Figure 4 is Figure 3 a perspective view of a terminal of the magnetic device shown in FIG. 1;

[0023] Figure 5 is Figure 4 a side view of one terminal shown in FIG. 1;

[0024] Figure 6 is a structure diagram of a second magnetic device of the first embodiment of the present application;

[0025] Figure 7 is Figure 6 a perspective view of one terminal of the magnetic device shown in FIG. 2;

[0026] Figure 8 is Figure 7 a side view of the terminal shown in FIG. 2;

[0027] Figure 9 is a structure diagram of a third magnetic device of the first embodiment of the present application;

[0028] Figure 10 is Figure 9 a perspective view of one terminal of the magnetic device shown in FIG. 3;

[0029] Figure 11 is Figure 10 a side view of the terminal shown in FIG. 3;

[0030] Figure 12 is a structure diagram of the magnetic device of the second embodiment of the present application after assembled with a circuit board;

[0031] Figure 13 is Figure 12 an exploded structure diagram of the magnetic device shown in FIG. 4;

[0032] Figure 14 is Figure 12 a structure diagram of one terminal of the magnetic device shown in FIG. 4;

[0033] Figure 15 is Figure 14 a side view of the terminal shown in FIG. 4.

[0034] a first direction x, a second direction y, a third direction;

[0035] Magnetic device 100, magnet / magnetic ring 1, winding 2, terminal 3, shell 4, lead wire 20, insulating partition 5, protective sheet 6; first terminal 3a, second terminal 3b, pre-positioning 30, main body part 31, wiring part 32, external connection part 33, thorn 311, first branch 321, second branch 322, third branch 323, branch 324, notch 325, first main body part 312, second main body part 313, extension part 34, soldering tin 340, first part 341, second part 342, first subpart 3411, second subpart 3412; mounting hole 41, outgoing slot 42, wire protection slot 43, bearing platform 44, combination 45, top wall 401, adhesive 402, mesa 440, circuit board 200. DETAILED DESCRIPTION

[0036] To solve the above technical problems in the prior art, the side lead magnetic device of the present application comprises a magnet, a winding, a shell and a plurality of terminals, each terminal extends into the bearing platform of the shell, and one end extends out of the mesa of the bearing platform and is lower than the top wall of the shell, and the other end is exposed on the bottom surface of the bearing platform, the lead wire of the winding extends to the mesa of the bearing platform through the outgoing slot at the bottom of the shell and the wire protection slot on the outside of the shell in turn, and is electrically connected with the corresponding terminal. Here, the electrical connection position of the lead wire end of the winding and the terminal is away from the coil body of the winding, which reduces the risk of terminal paint film back burning invading the coil body and improves the problem of poor insulation voltage resistance of the coil body caused thereby; in addition, the electrical connection position of the lead wire end of the winding and the terminal is located on the outside of the shell, which is conducive to the appearance quality control of the electrical connection effect at this position.

[0037] Among them, the specific form of the shape, number, size and other parameters of any one of the magnet, winding, shell, terminal and bearing platform can be adapted according to the actual scene required, and the present application is not limited.

[0038] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly below in combination with specific embodiments and corresponding drawings. Obviously, the following described embodiments are only a part of the embodiments of the present application, not all the embodiments. In the case of no conflict, the following various embodiments and their technical features can be combined with each other, and also belong to the technical scheme of the present application.

[0039] In the description of the embodiments of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solutions of the corresponding embodiments, and are not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application.

[0040] First Embodiment

[0041] Side-leaded magnetic devices are also known as magnetic devices; please refer to the previous section for more information. Figures 1 to 3 As shown, the magnetic device 100 in this example includes a magnet 1, a winding 2, several terminals 3, and a housing 4. The number of terminals 3 provided in this application can be determined according to the type of magnetic device 100, for example, Figures 1 to 3 The magnetic device 100 shown may be provided with four terminals 3.

[0042] For ease of description and understanding, combined with Figures 1 to 5 In the orientation shown, the width direction of the magnetic device 100 is referred to as the first direction x, the height direction as the second direction y, and the thickness direction as the third direction z. The first direction x, the second direction y, and the third direction z are all 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 term "perpendicular" throughout this application does not require that the angle between the two directions must be 90°, but allows for deviations of, for example, ±10°. That is, "perpendicular" can be understood as the angle between any two directions being 80° to 100°. Similarly, the term "parallel" throughout this application does not require that the angle between the two directions be 0° or 180°, but allows for deviations of, for example, ±10°. That is, "parallel" can be understood as the angle between any two directions being 0° to 10° or 170° to 190°.

[0043] Magnet 1 can be a ring-shaped magnetic component with a circular cross-section (xz), referred to as magnetic ring 1, made of a soft magnetic material conventional in the art, and the surface of magnet 1 is covered with an insulating layer. The magnet 1 illustrated in this application is only an exemplary illustration; other examples may also be octagonal or other polygonal shapes.

[0044] The winding 2 can include two coils, for example, formed by winding the lead wire 20 of the type of enameled wire. The lead wire 20 of each coil is wound on the magnetic ring 1 turn by turn to form a magnetic circuit, and the winding mode is adaptive. After winding, the two coils are arranged opposite to each other along the first direction x, and the so-called opposite arrangement means that the two main bodies are not in contact, that is, the distance is not equal to zero. The end portion of the lead wire 20 can extend out of the magnetic ring 1 and be electrically connected to the corresponding terminal 3, for example, welding can be used to achieve electrical connection. In Figures 1 to 3 the example, the winding 2 is provided with four end portions of the lead wire 20, and the magnetic device 100 is provided with four terminals 3, which are different in shape. For the convenience of description, the same two can be called first terminals 3a, and the other same two can be called second terminals 3b. The structures of the first terminals 3a and the second terminals 3b can be completely symmetrically arranged. Among them, two end portions of the lead wire 20 correspond to two second terminals 3b one by one and are welded; the remaining two end portions of the lead wire 20 correspond to two first terminals 3a one by one and are welded.

[0045] As Figure 3 shown, an insulating partition plate 5 can be arranged between the two coils, which is made of insulating material and is used to separate the two coils to avoid interference between the two coils. Of course, when the distance between the two coils is large enough, the magnetic device 100 can also not be provided with the insulating partition plate 5.

[0046] The shell 4 can be a plastic part and is provided with a receiving cavity, a mounting hole 41, a wire outlet groove 42, and a wire protection groove 43. The top of the receiving cavity is closed by the top wall 401 of the shell 4, and the bottom of the receiving cavity is designed in an open type, that is, provided with an opening to serve as part of the bottom of the shell 4 for mounting and exposing the winding 2. In addition, the periphery of the receiving cavity and adjacent to the top wall 401 is provided with two abutments 44, which are arranged opposite to each other along the first direction x. The mounting hole 41 is a through hole penetrating the abutment 44 along the second direction y. The x-z cross-sectional shape of the mounting hole 41 is adapted to the x-z cross-sectional shape of the corresponding terminal 3, for example, the mounting hole 41 can be provided with a serrated structure to adapt to the protrusions 311 of each terminal 3 shown in the figure. The end portion of each abutment 44 extends beyond the cavity wall of the receiving cavity along the third direction z. The wire protection groove 43 is formed at the joint of the abutment 44 and the cavity wall of the receiving cavity, and the wire outlet groove 42 is arranged at the bottom of the cavity wall of the receiving cavity and communicates with the wire protection groove 43.

[0047] Referring to Figure 4 and Figure 5 together, a single terminal (which can be simply referred to as "electrode" or "external terminal") 3 of the present application is shown, which includes a main body portion 31, a wiring portion 32, and an external connection portion 33.

[0048] At least one side of the main body 31 is provided with a plurality of outward protruding protrusions 311, and the protrusions 311 are arranged in the second direction y. Figure 4 And Figure 5 In the example, the main body 31 is provided with a plurality of protrusions 311 on both sides along the width direction of the main body 31 (i.e. along the third direction z), and the plurality of protrusions 311 on each side of the main body 31 are arranged in sequence in the second direction y, and the distance between each two protrusions 311 can be equal to achieve uniform distribution. The protrusions 311 and the corresponding side of the main body 31 form an introduction angle α and a anti-loose angle β, and along the direction of the main body 31 inserted into the magnetic device 100 (i.e. along the opposite direction of the second direction y or the gravity direction), the introduction angle α is an acute angle.

[0049] The wiring part 32 is arranged at one end of the main body 31, for example, the upper end or the top end shown in the figure, for electrical connection with the lead 20 of the winding 2 of the magnetic device 100. The external connection part 33 is arranged at one end of the main body 31, for example, the lower end or the bottom end shown in the figure, for electrical connection with the circuit board. The external connection part 33 has the same extension direction as the corresponding main body 31, both are parallel to the second direction y, and both are located in the same plane, so that each terminal 3 is a sheet-shaped electrode, which is suitable for plug-in type magnetic device 100.

[0050] Each main body 31 can be inserted into the corresponding mounting hole 41 of the shell 4 in the second direction y. The sawtooth structure in the mounting hole 41 can only allow the protrusions 311 to be inserted in the insertion direction and abut against the anti-loose angle β to block the protrusions 311 from being separated from the mounting hole 41 in the opposite direction of the insertion direction. The external connection part 33 extends to the outside of the shell 4 through the bottom of the shell 4, and can be electrically connected with the circuit board in a plug-in manner. In other examples, the shell 4 can be formed by injection molding, and each main body 31 is wrapped inside. Of course, other ways or structures can also be used to realize the extension of each main body 31 into the shell 4 in the second direction y.

[0051] Based on this, each terminal 3 extends into the platform 44, and one end extends out of the table surface 440 of the platform 44 and is lower than the top wall 401 of the shell 4, and the other end is exposed to the bottom surface of the platform 44. In addition, along the direction of the main body 31 inserted into the shell 4, the acute introduction angle α of the protrusions 311 is conducive to the insertion of the terminal 3 into the shell 4, facilitating installation, and the anti-loose angle β of the protrusions 311 can cooperate with the shell 4 to make the shell 4 at least apply a force opposite to the insertion direction to the protrusions 311, so as to block the movement of the terminal 3 in the opposite direction of the insertion direction, thereby avoiding the loosening of the terminal 3 relative to the magnet 1 and the shell 4, thereby reducing the risk of electrical connection failure between the terminal 3 and the lead 20 and the circuit board.

[0052] In an example, the protrusions 311 satisfy at least one of the following:

[0053] The introduction angle α satisfies 10°≤α≤35°.

[0054] The anti-off angle β satisfies 60°≤β≤130°;

[0055] The height difference between the protrusion 311 and the corresponding side is H, which can be regarded as the protruding height of the protrusion 311, and 0.03mm≤H≤0.3mm;

[0056] The convex point corner radius of the protrusion 311 is R, and 0mm≤R≤0.1mm. Among them, the convex point of the protrusion 311 is designed with a sharp corner as the best.

[0057] Based on the above corresponding threshold range, the present example can not only facilitate the convenient insertion and installation of the terminal 3 and prevent loosening, but also ensure that each protrusion 311 has high structural strength.

[0058] Please continue to refer to Figures 1 to 3 After the winding 2 and the magnet 1 are matched, they are installed in the accommodating cavity from the opening at the bottom of the shell 4. One side of the accommodating cavity corresponding to the top wall 401 can be provided with a glue body 402, which adhesively fixes the two coils of the winding 2 and the insulating partition plate 5 in the accommodating cavity of the shell 4. In an example, the magnetic device 100 can be provided with a protective sheet 6 at the bottom of the accommodating cavity, which is made of insulating material and is arranged on the surface of the winding 2 coil facing the external connecting part 33, so as to shield the winding 2 coil, thereby improving the defect that the solder splashing to the coil body during the welding of the external connecting part 33 and the circuit board causes poor insulation voltage resistance of the coil body.

[0059] Each lead 20 end of the winding 2 coil extends from the corresponding lead-out groove 42 to the outside of the shell 4, and extends along the wire protection groove 43 on the outside of the shell 4 to the mesa 440 of the support platform 44, so as to be connected with the connecting part 32 of the corresponding main body part 31, and the combination of the lead 20 end and the connecting part 32 can be wrapped by a combination body 45 such as solder. The mesa 440 of the support platform 44 is lower than the top wall 401 of the shell 4, so that the top end of each main body part 31 after being connected with the lead 20 end is also lower than the top wall 401 of the shell 4, and finally the combination of the lead 20 end and the connecting part 32 is also lower than the top wall 401 of the shell 4, thereby reducing the risk of the combination being collided by the outside, so as to facilitate the stability of the electrical connection.

[0060] In addition, the electrical connection position of the lead 20 end of the winding 2 and the terminal 3 is away from the coil body of the winding 2, which can reduce the risk of the terminal 3 paint film re-burning invading the coil body, thereby improving the problem of poor insulation voltage resistance of the coil body caused thereby; in addition, the electrical connection position of the lead 20 end of the winding 2 and the terminal 3 is located on the outside of the shell 4, which is conducive to the appearance quality control of the electrical connection effect of the position.

[0061] Please continue to refer to Figure 5The outer connecting part 33 of each terminal 3 is provided with a chamfer θ on opposite sides along the width direction of the outer connecting part 33, and the chamfer θ is an acute angle along the insertion direction, so that the width of the outer connecting part 33 gradually decreases along the extension direction, facilitating the insertion of each terminal 3 into the shell 4. In an example, the chamfer θ satisfies: 10°≤θ≤45°. In addition, in the actual scenario, for the sheet terminal 3 shown in the figure, the insertion end of the outer connecting part 33 includes four sides, and therefore the four sides can be respectively provided with a chamfer θ.

[0062] In Figures 1 to 5 an example, each terminal 3 can form a predetermined position 30 with a smaller width at the joint of the wiring part 32 and the main body part 31, and the end of the lead wire 20 is wound around the predetermined position 30 to achieve electrical connection between the coil of the winding 2 and the corresponding terminal 3. In addition, the wiring part 32 and the main body part 31 can be staggered, and when the main body part 31 is inserted into the shell 4, the wiring part 32 is away from the accommodation cavity, thereby facilitating the end of the lead wire 20 to be wound around the wiring part 32 via the space between the wiring part 32 and the accommodation cavity.

[0063] The present application does not limit the manner in which the end of the lead wire 20 and the wiring part 32 are electrically connected, and accordingly the specific structure of the wiring part 32 can be adapted according to actual needs.

[0064] For example, as shown in Figures 6 to 8 , the wiring part 32 can be vertically arranged on the side of the main body part 31 away from the accommodation cavity, and include a first branch 321, a second branch 322 and a third branch 323. The first branch 321 is sheet-shaped and vertically arranged on one side of the main body part 31, and the second branch 322 and the third branch 323 are respectively connected to the two sides of the first branch 321 along the width direction thereof. When the end of the lead wire 20 extends to the first branch 321, the second branch 322 and the third branch 323 are respectively bent towards the end of the lead wire 20, and finally the end of the lead wire 20 is pressed and fixed on the first branch 321 to achieve electrical connection between the end of the lead wire 20 and the wiring part 32. The bent second branch 322 and the third branch 323 are arranged side by side along the thickness direction of the main body part 31 to improve the pressing and fixing effect on the end of the lead wire 20.

[0065] For another example, as shown in Figures 9 to 11 , the wiring part 32 can include two branches 324 arranged opposite to each other, one of which is arranged opposite to the side edge of the main body part 31 to form a gap 325, and the end of the lead wire 20 extends to the gap 325 via the space between the wiring part 32 and the cavity wall of the accommodation cavity, and then extends to the other branch 324 via the side of the wiring part 32 away from the accommodation cavity, and then extends around the other branch 324 via the space between the wiring part 32 and the cavity wall of the accommodation cavity, and finally is clamped and fixed between the two branches 324 to achieve electrical connection between the end of the lead wire 20 and the wiring part 32.

[0066] Second embodiment

[0067] The same reference numerals are used to identify the same structural elements in the present application. The difference between the first embodiment and the second embodiment is that the second embodiment is described based on the first embodiment, and Figures 12 to 15 As shown in the figure, each terminal 3 of the second embodiment includes two main body parts 31 arranged opposite to each other, which are respectively referred to as a first main body part 312 and a second main body part 313, and are arranged opposite to each other along the third direction z in the figure.

[0068] The outer connecting part 33 is arranged at the first end (i.e. the lower end or the bottom end) of the first main body part 312 and the first end (i.e. the lower end or the bottom end) of the second main body part 313, and is perpendicular to the extension direction (i.e. the second direction y) of the first main body part 312 and the extension direction of the second main body part 313, so as to connect the first end of the first main body part 312 and the first end of the second main body part 313. The outer connecting part 33 is exposed and attached to the bottom of the magnetic device 100, and specifically is exposed and attached to the bottom surface of the platform 44 of the shell 4. The magnetic device 100 of the present embodiment is equivalent to a patch type magnetic device 100, and the outer connecting part 33 can be regarded as a patch electrode or a patch pin of the magnetic device 100.

[0069] The wiring part 32 is arranged at the second end (i.e. the upper end or the top end) of the first main body part 312.

[0070] The height of the first main body part 312 is greater than the height of the second main body part 313, and the height refers to the length along the second direction y, so that the wiring part 32 can be exposed to the shell 4 of the magnetic device 100, and specifically is exposed to the table surface 440 of the platform 44, while the second end of the second main body part 313 is not exposed to the shell 4.

[0071] Both of the two main body parts 31 of the present embodiment are provided with the protrusions 311, so that the cooperation stability of the terminal 3 and the shell 4 is better, and the risk of loosening in the magnetic device 100 is lower, and the risk of electrical connection failure is lower. In other examples, the protrusions 311 can be arranged on only one of the main body parts 31, and in addition, any one of the main body parts 31 can be provided with the protrusions 311 on only one side.

[0072] The terminal 3 of the present embodiment further includes an extension part 34, one end of which is arranged at one side of the outer connecting part 33, and after being bent, the other end thereof is directed towards the table surface 440 of the platform 44 along the second direction y, and is exposed and attached to the side surface of the platform 44, so as to be exposed and attached to the side of the magnetic device 100.

[0073] Unlike the first embodiment, in the second embodiment, the main body 31 is inserted into the housing 4 from the bottom of the housing 4 to assemble the magnetic device 100. When the terminal 3 is assembled in the magnetic device 100, the extension 34 can be exposed to the side of the magnetic device 100. When the external connection part 33 is welded to the circuit board 200 to perform SMT, the solder 340 used for welding can overflow and adhere to the outer surface of the extension 34, so that the solder 340 after final curing can be exposed to the extension 34 of each terminal 3. When the AOI (Automated Optical Inspection) technology is used, the AOI detection equipment can collect the solder 340 image along the gravity direction (i.e. the opposite direction of the second direction y), and judge whether the welding quality is qualified, so as to realize effective monitoring of the SMT quality.

[0074] Continuing to refer to Figure 14 and Figure 15 , the extension 34 of the present example includes a first part 341 and a second part 342, the first part 341 is arranged in the same layer as the external connection part 33, and the second part 342 is arranged opposite to the first main body 312 and the second main body 313 along the first direction x. The first part 341 includes a first sub-part 3411 and a second sub-part 3412, and the first sub-part 3411 and the second sub-part 3412 are sequentially connected between the external connection part 33 and the second part 342, the thickness of the first sub-part 3411 is greater than the thickness of the second sub-part 3412, and optionally, the thickness of the second part 342 is equal to the thickness of the second sub-part 3412, and the thickness of the first sub-part 3411 is equal to the thickness of the external connection part 33; the second part 342 is perpendicular to the second sub-part 3412, and the thickness of the second part 342 and the thickness of the second sub-part 3412 are both less than the thickness of the external connection part 33, and also less than the thickness of the first sub-part 3411, the second part 342 extends along the extension direction of the main body 31 and is perpendicular to the corresponding main body 31, and is exposed to the side of the magnetic device 100 away from the wire slot 43.

[0075] Based on the above, the first part 341 of the extension 34 and the external connection part 33 can correspond to the patch electrode of the magnetic device 100, and realize electrical connection with the circuit board 200 in a patch manner. Since the second part 342 of the extension 34 extends to the side of the magnetic device 100 via the external connection part 33 and the first part 341, the patch electrode can reach the outermost side of the shell of the magnetic device 100, and the thickness of the second part 342 is small, so when the external connection part 33 is welded with the circuit board 200 to perform SMT mounting, the solder used for welding will overflow and adhere to the outer surface of the extension 34, so that the solder 340 after final solidification will be exposed on the extension 34 of each terminal 3, and when the AOI technology is used, the AOI equipment can collect the solder 340 image along the gravity direction (i.e. the opposite direction of the second direction y), which is beneficial to the vertical AOI detection and judgment to judge whether the welding quality is qualified, and realizes effective monitoring of the SMT quality.

[0076] In addition, the thickness of the second part 342 and the thickness of the second sub-part 3412 are small, which not only facilitates the bending formation of the second part 342 relative to the second sub-part 3412, but also forms a gap between the connection of the two parts and the first sub-part 3411, and the shell 4 of the magnetic device 100 can be stably connected with the gap, so as to facilitate the stable assembly of the terminal 3 and the shell 4 at the bottom of the magnetic device 100.

[0077] In an example, the width of the extension 34 and the external connection part 33 can be equal, that is, the width of the first part 341 (including the first sub-part 3411 and the second sub-part 3412) and the second part 342 can be equal to the width of the external connection part 33, and the width refers to the length along the direction perpendicular to the main body part 31 and parallel to the external connection part 33 (i.e. along the third direction z). At this time, when the extension 34 and the external connection part 33 are in the un-bent sheet structure, the sheet structure can be a conductive strip with equal width but different thickness, and the conductive strip is easy to bend to form the structure shown in the drawing at the second sub-part 3412 with smaller thickness.

[0078] In an example, the extension 34 satisfies at least one of the following:

[0079] The thickness of the second part 342 is E1, which satisfies E1≤0.2mm;

[0080] The thickness of the second sub-part 3412 is E2, which satisfies E2≤0.2mm;

[0081] The connection between the second part 342 and the second sub-part 3412 is rounded, and the outer corner radius of the rounded corner is R, which satisfies R≤0.5mm, and preferably R≤0.25mm.

[0082] The width of the second sub-portion 342 in the direction from the outer portion 33 to the second portion 342, i.e. in the direction parallel to the first direction x, is F, which satisfies F≥0.1mm.

[0083] Based on the above corresponding threshold range, the present example can ensure that the extension portion 34 has high structural strength while facilitating the vertical AOI detection of the terminal 3 and the assembly with the shell 4.

[0084] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. For those skilled in the art, any equivalent structural transformation made by using the content of the present application and the drawings is also included in the patent protection scope of the present application.

[0085] Although the terms "first", "second", and the like are used herein to describe various information, the 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", "a", and "the" are intended to include the plural forms. 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, will there be an exception to this definition.

Claims

1. A side-leaded magnetic device, characterized in that, include: magnet; A winding is wound around the magnet to form a magnetic circuit; The housing includes a receiving cavity, a wire outlet groove, a wire guard groove, and two supports. The magnet and the winding are disposed within the receiving cavity. The top of the receiving cavity is closed by the top wall of the housing. The wire outlet groove is disposed at the bottom of the cavity wall. The two supports are disposed around the periphery of the receiving cavity and are arranged opposite each other along a first direction. The platform surface of the supports is lower than the top wall of the housing along a second direction. The ends of each support extend beyond the cavity wall along a third direction. The wire guard groove is formed at the junction of the support and the cavity wall and communicates with the wire outlet groove. Several terminals are provided, each terminal extending into the base, with one end extending out of the base surface and below the top wall of the housing, and the other end exposed on the bottom surface of the base; the leads of the winding extend sequentially through the lead-out groove and the wire guard groove to the base surface and are electrically connected to the corresponding terminals.

2. The side-leaded magnetic device according to claim 1, characterized in that, The winding includes two coils arranged opposite each other along a first direction; The magnetic device also includes an insulating partition disposed between the two coils.

3. The side-leaded magnetic device according to claim 1, characterized in that, The magnetic device also includes a protective sheet made of insulating material, which is disposed at the bottom of the housing and closes the opening at the bottom of the receiving cavity to shield the coil of the winding.

4. The side-leaded magnetic device according to claim 2, characterized in that, The magnetic device has an adhesive on one side corresponding to the top wall of the housing, which bonds and fixes the coil of the winding and the insulating partition in the accommodating cavity.

5. The side-leaded magnetic device according to claim 1, characterized in that, The terminal includes at least one main body, one wiring part, and one external part; The main body extends into the support platform. At least one side of each main body is provided with a plurality of protruding protrusions. An inlet angle and an anti-detachment angle are formed between the protrusions and the corresponding side of the main body. In the opposite direction of the second direction, the inlet angle is an acute angle. The anti-detachment angle cooperates with the support platform to prevent the main body from moving along the second direction. The wiring portion is located at one end of one of the main bodies and is electrically connected to the lead wire of the winding. The external part is located at one end of one of the main parts and is used for electrical connection with the circuit board.

6. The side-leaded magnetic device according to claim 1, characterized in that, The terminal includes at least one main body, one wiring part, one external part, and one extension part; The main body extends into the support platform; The wiring portion is located at one end of one of the main bodies and is electrically connected to the lead wire of the winding. The external portion is disposed at one end of one of the main bodies and is used for electrical connection with the circuit board. One end of the extension is located on one side of the external part. After the extension is bent, the other end faces the platform surface of the support in the second direction and is exposed and attached to the side of the support.

7. The side-leaded magnetic device according to claim 6, characterized in that, The extension includes a first part and a second part. The first part is disposed on the same layer as the outer part. The first part includes a first sub-part and a second sub-part, which are connected sequentially between the outer part and the second part. The thickness of the first sub-part is greater than the thickness of the second sub-part. The second part is perpendicular to the second sub-part, and the thickness of the second part and the thickness of the second sub-part are both less than the thickness of the outer part or the first sub-part. The second part extends along the extension direction of the main body and is perpendicular to the main body, and is exposed and attached to the side of the support away from the cable tray.

8. The side-leaded magnetic device according to any one of claims 5 to 7, characterized in that, The external portion is located at the other end of the corresponding terminal and extends out of the bottom surface of the support platform. The external portion extends in the same direction as the corresponding main body portion and both are located on the same plane.

9. The side-leaded magnetic device according to claim 5, characterized in that, The at least one main body includes a first main body and a second main body disposed opposite to each other; the external part is disposed at a first end of the first main body and a first end of the second main body, and is perpendicular to the extension direction of both the first main body and the second main body; the external part connects the first main body and the second main body, and is exposed and attached to the bottom surface of the support platform.

10. The side-leaded magnetic device according to claim 9, characterized in that, The wiring portion is located at the second end of the first main body portion; The height of the first main body is greater than the height of the second main body, the wiring portion is exposed on the support, and the second end of the second main body is not exposed on the support.

Images