Magnetic material unit

Abstract

The objective is to provide a magnetic unit that can properly hold a magnetic core. [Solution] The magnetic material unit 1 includes a magnetic material core 10 formed in an annular shape around a first direction X and divided along a second direction Y intersecting the first direction X, with the first core 11 and the second core 12 in contact along a third direction Z intersecting the first direction X and the second direction Y; a base member 20 that houses the magnetic material core 10 and has a bottom portion 21 and a side wall portion 22; a cover 30 having a support portion 31 provided opposite to the second core 12 and a cover side portion 32 provided opposite to the side wall portion 22; and a leaf spring 40 that biases the second core 12 toward the first core 11. The base side locking portion 25 provided on the side wall portion 22 and the cover side locking portion 35 provided on the cover side portion 32 are locked together by the cover 30 and the base member 20 moving relative to each other in a direction that brings them closer together.

Description

Technical Field

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[0001] The present invention relates to a magnetic unit.

Background Art

[0002] As a technology related to a conventional magnetic unit, for example, in Patent Document 1, the first holder has a base portion that encloses and positions the first core on one surface side of the substrate, and two through portions that position the second core on the other surface side of the substrate while passing through two holes in the substrate. The second holder is assembled to the two through portions on the other surface side of the substrate to hold the first core and the second core.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in such a magnetic unit, for example, the holding of the magnetic core including the first core and the second core may involve abutting the first core and the second core with a strong force. Therefore, there is room for further improvement in the locking structure of the two members that hold the magnetic core, such as the base portion that encloses the first core and the locking structure of the second holder that locks to the base portion. <00汗0027> The present invention has been made in view of the above circumstances, and an object thereof is to provide a magnetic unit that can appropriately achieve the holding of a magnetic core.

Means for Solving the Problems

[0006] To achieve the above objective, the magnetic unit of the present invention comprises a magnetic core formed in an annular shape around a first direction and comprising a first core and a second core divided along a second direction intersecting the first direction, wherein the first core and the second core abut along a third direction intersecting the first and second directions; a base member having a bottom portion that houses the magnetic core and supports the first core, and a side wall portion provided on the side of the magnetic core in the second direction; a cover having a support portion provided facing the second core in the third direction, and a cover side portion provided facing the side wall portion in the second direction; and a biasing member provided between the support portion and the second core, which biases the second core toward the first core along the third direction, wherein the side wall portion is provided with a base-side locking portion, and the cover side portion is provided with a cover-side locking portion, and the base-side locking portion and the cover-side locking portion are locked together by the relative movement of the cover and the base member in a direction that brings them closer to each other along the first direction. [Effects of the Invention]

[0007] The magnetic material unit according to the present invention has the effect of being able to properly hold the magnetic material core. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing a magnetic material unit according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view showing a magnetic material unit according to an embodiment. [Figure 3] Figure 3 is a perspective view showing the base member according to the embodiment. [Figure 4] Figure 4 is a perspective view showing a bobbin according to the embodiment. [Figure 5] Figure 5 is a perspective view showing a cover to which a leaf spring according to the embodiment is attached. [Figure 6] Figure 6 is a cross-sectional view taken along the line VI-VI in Figure 1. [Figure 7] Figure 7 is a cross-sectional view taken along line VII-VII in Figure 1. [Figure 8] Figure 8 is a perspective view showing the base member according to the embodiment before the cover is attached. [Figure 9] Figure 9 is a perspective view showing the state of the cover attached to the base member according to the embodiment before it is slid. [Figure 10] Figure 10 is a cross-sectional view of XX in Figure 9. [Figure 11] Figure 11 is a partially enlarged cross-sectional perspective view of the XI-XI section in Figure 9. [Figure 12] Figure 12 is a cross-sectional view corresponding to the XX section in Figure 9 after the cover has been slid open. [Figure 13] Figure 13 is a partially enlarged cross-sectional perspective view corresponding to the XI-XI section in Figure 9, after the cover has been slid open. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, some of the components in the following embodiments may be easily substituted or substantially identical to those that are easily substituted by those skilled in the art.

[0010] [Embodiment] The magnetic unit 1 of this embodiment, shown in Figures 1 and 2, is installed in a high-voltage junction box to which a high-voltage battery pack, such as those mounted in electric vehicles or hybrid vehicles, is electrically connected. The magnetic unit 1 has a busbar 100 inserted through an annular magnetic core 10, which includes a first core 11 and a second core 12, which are divided cores. The busbar 100 is a circuit body (conductor) that constitutes a high-voltage circuit system including a high-voltage battery pack. The magnetic unit 1, equipped with the magnetic core 10, can effectively remove high-frequency noise in the busbar 100 and suppress surge voltages.

[0011] The magnetic unit 1 includes a magnetic core 10, a base member 20, a cover 30, a leaf spring 40 as a biasing member, and two bobins 50. Two busbars 100 are inserted into the annularly formed magnetic core 10. The busbars 100 are formed in a long shape, but only a part of them is shown in the figure.

[0012] In the following description, the axial direction of the annular magnetic core 10 in which the two busbars 100 extend is defined as the first direction X, and the two directions orthogonal to the first direction X are defined as the second direction Y and the third direction Z. The second direction Y is the direction in which the two busbars 100 are arranged. Further, in the following, one side of the first direction X is referred to as one side X1 and the other side as the other side X2. Similarly, for the second direction Y, one side is referred to as one side Y1 and the other side as the other side Y2, and for the third direction Z, one side is referred to as one side Z1 and the other side as the other side Z2.

[0013] As shown in FIG. 2, the magnetic core 10 includes a first core 11 and a second core 12 divided along the second direction Y. The magnetic core 10 is formed annularly around the first direction X in a state where the first core 11 and the second core 12 are combined (see also FIG. 6). The first core 11 and the second core 12 are formed in the same shape and are members containing a magnetic material such as ferrite. The first core 11 and the second core 12 are each substantially U-shaped when viewed from the first direction X and are formed long along the first direction X. The two flat surfaces located on the open side of the substantially U-shape of the first core 11 and the second core 12 are defined as contact surfaces 10a and 10b. The magnetic core 10 has the contact surfaces 10a and 10b of the first core 11 and the second core 12 contacting each other along the third direction Z.

[0014] As shown in Figure 3, the base member 20 is formed in the shape of a roughly rectangular box with an opening on one side Z1 in the third direction Z. The base member 20 is provided with a roughly rectangular plate-shaped bottom portion 21 that is roughly parallel to the planes including the first direction X and the second direction Y. A core support portion 21a is formed in a grid pattern on one side Z1 in the third direction Z of the bottom portion 21. The surface of the core support portion 21a on one side Z1 in the third direction Z contacts and supports the surface of the first core 11 on the other side Z2 in the third direction Z. As shown in Figure 6, a grid-like rib 21b similar to that of the core support portion 21a is also formed on the other side Z2 in the third direction Z of the bottom portion 21.

[0015] As shown in Figure 3, two side wall portions 22 are provided near the end of one side Y1 in the second direction Y and near the end of the other side Y2 of the bottom portion 21, extending toward one side Z1 in the third direction Z. Each side wall portion 22 is substantially plate-shaped with its plate surface facing the second direction Y. The side wall portions 22 are provided to the sides of the magnetic core 10 in the second direction Y. A base-side locking portion 25 is provided on the outer surface 22a of each side wall portion 22 so as to protrude from the outer surface 22a. Each base-side locking portion 25 has four base-side locking portions 25a to 25d. The base-side locking portion 25a is provided on one side X1 in the first direction X, and the base-side locking portions 25b, 25c, and 25d are provided in order toward the other side X2 in the first direction X.

[0016] The base-side locking portions 25a to 25d are each formed in a substantially L shape when viewed from the second direction Y. The base-side locking portions 25a to 25d each have locking support portions 25a1, 25b1, 25c1, 25d1 that are long and prismatic along the third direction Z, and locking receiving portions 25a2, 25b2, 25c2, 25d2 provided so as to protrude from the locking support portions 25a1, 25b1, 25c1, 25d1 along the first direction X. Among the locking support portions 25a1, 25b1, 25c1, 25d1, the length in the third direction Z is the longest for the locking support portion 25a1, followed by the locking support portion 25b1, the locking support portion 25c1, and the locking support portion 25d1 in that order. The base-side locking portions 25a to 25c (locking receiving portions 25a2 to 25c2) are located on the other side Z2 in the third direction Z than the adjacent base-side locking portions 25b to 25d (locking receiving portions 25b2 to 25d2) on the other side X2 in the first direction X. That is, the base-side locking portions 25a to 25d (locking receiving portions 25a2 to 25d2) are provided offset along the third direction Z. In other words, the base-side locking portions 25a to 25d (locking receiving portions 25a2 to 25d2) are arranged in a stepped manner. Also, the locking receiving portions 25a2, 25c2 of the base-side locking portions 25a, 25c protrude toward one side X1 in the first direction X. The locking receiving portions 25b2, 25d2 of the base-side locking portions 25b, 25d protrude toward the other side X2 in the first direction X. Thereby, it is possible to arrange the base-side locking portions 25a to 25d and cover-side locking portions 35a to 35d (described later) that lock to the base-side locking portions 25a to 25d while narrowing the interval in the first direction X.

[0017] Further, on the base member 20, substantially plate-shaped regulating ribs 23 are provided on the outside in the second direction Y of each side wall portion 22. The regulating ribs 23 regulate the outward movement in the second direction Y of the cover-side portions 32 of a cover 30 described later. Each regulating rib 23 is arranged with its plate surface facing the second direction Y and is spaced apart outward along the second direction Y from the side wall portion 22. Each regulating rib 23 is connected to the side wall portion 22 by three vertical ribs 24. A space S1 is formed on one side Z1 in the third direction Z among the three vertical ribs 24, which is sandwiched between the regulating rib 23 and the side wall portion 22.

[0018] A locking projection 22b is provided at the end of the other side X2 in the first direction X of each side wall portion 22. The locking projection 22b engages with a locking projection 32d of the cover 30, which will be described later. The locking projection 22b is formed to be long along the third direction Z. The length of the locking projection 22b in the third direction Z is the same as that of the side wall portion 22. The cross-section of the locking projection 22b in the plane including the first direction X and the second direction Y is formed to be mountain-shaped (i.e., mountain-shaped cross-section). One side X1 of the locking projection 22b in the first direction X is a locking surface 22b1 perpendicular to the outer surface 22a of the side wall portion 22. The other side X2 of the locking projection 22b that connects to the locking surface 22b1 is an inclined surface 22b2.

[0019] Each side wall portion 22 is provided with a roughly plate-shaped insertion plate portion 26 at one end X1 and the other end X2 in the first direction X. Each insertion plate portion 26 is provided with its plate surface facing the first direction X. Each insertion plate portion 26 has a long insertion opening 26a along the third direction Z, approximately in the center in the second direction Y. A bobbin 50 is placed in the insertion opening 26a and a busbar 100 is inserted through it.

[0020] As shown in Figure 2, the bobbin 50 consists of two bobbins 50 facing each other along the third direction Z. The two bobbins 50 are identical in shape. As shown in Figure 4, the bobbin 50 has two spaced-apart side plates 51a and 51b, and a partition plate 52 placed between the two side plates 51a and 51b. Each side plate 51a, 51b and the partition plate 52 are formed in a roughly elongated rectangular shape, with the longer side plate in the first direction X and the plate surface facing the second direction Y. Each side plate 51a, 51b and the partition plate 52 are connected by a bottom plate 53 at the end of the other side Z2 in the third direction Z. In Figure 4, the height of the side plate 51a on one side Y1 in the second direction Y is higher than the height of the side plate 51b and partition plate 52 on the other side Y2. Furthermore, the other side Y2 of the partition plate 52 in the second direction Y is provided with three ribs 52a that connect to the bottom plate 53. Each side plate 51a, 51b is provided with a retaining plate 54 at each end of one side X1 and the other side X2 in the first direction X. The retaining plate 54 is provided with its surface facing the first direction X. The retaining plate 54 has an opening corresponding to the space between the side plates 51a, 51b, and a portion is formed that protrudes outward from the side plates 51a, 51b.

[0021] As shown in Figure 6, the two bobbins 50 facing each other in the third direction Z are arranged inside the annular shape of the magnetic core 10, and busbar insertion passages 58 are formed on one side Y1 and the other side Y2 of the partition plate 52 in the second direction Y. The partition plates 52 are arranged so as to overlap near the ends in the third direction Z. Also, as shown in Figure 7, the inner surfaces of the stopper plates 54 of each bobbin 50 are in close proximity to or in contact with the outer surfaces of the insertion plate portions 26 of the base member 20.

[0022] As shown in Figures 2 and 5, the cover 30 has a support portion 31 and a cover side portion 32. The support portion 31 is formed in the shape of a substantially rectangular plate with its plate surface facing the third direction Z. The support portion 31 is provided facing the second core 12 in the third direction Z (see Figures 6 and 7). A pair of frame ribs 31a facing each other in the second direction Y is provided on the inner surface of the support portion 31. The frame ribs 31a have a main frame rib 31a1 which is long in the first direction X and has a portion that protrudes inward at one end X1, and an auxiliary rib 31a2 which connects the main frame rib 31a1 to the inner surface 32a of the cover side portion 32. A leaf spring 40 (biasing member) is provided between the frame ribs 31a.

[0023] Three leaf spring projections 34, formed in a roughly hook shape, are provided on the inner surface of the support portion 31 of the cover 30. The leaf spring projections 34 are positioned so as to be able to abut against the edge of the opening 41 of the leaf spring 40. The leaf spring projections 34 restrict the movement of the leaf spring 40 in the direction along the first direction X relative to the cover 30. An arrow indicator 31b is provided on one side Z1 of the support portion 31 of the cover 30 in the third direction Z, indicating the direction in which the cover 30 should be slid when assembled to the base member 20. The arrow indicator 31b is an arrow pointed towards one side X1 of the first direction X. The leaf spring 40 also has two legs 42, which are formed in a roughly mountain shape.

[0024] The cover side portion 32 is provided in a substantially rectangular plate shape, extending from one end Y1 and the other end Y2 in the second direction Y of the support portion 31 toward the other end Z2 in the third direction Z. The cover side portion 32 is provided opposite the side wall portion 22 of the base member 20 in the second direction Y (see Figure 6). The cover 30 is formed in a substantially U shape when viewed from the first direction X by the support portion 31 and the cover side portion 32.

[0025] A cover-side locking portion 35 is provided on the cover side portion 32, protruding from the inner surface 32a. As will be described in detail later, the cover-side locking portion 35 is locked to the base-side locking portion 25 when the cover 30 and the base member 20 move relative to each other in a direction that moves them closer together along the first direction X. The cover-side locking portion 35 has four cover-side locking portions 35a to 35d. Each of the four cover-side locking portions 35a to 35d is formed in a roughly L-shape, with the portion extending in the first direction X being longer when viewed from the second direction Y (see also Figures 10 and 12).

[0026] Each cover-side locking portion 35a to 35d has a sliding locking portion 352 extending in a first direction X, and an auxiliary rib 351 projecting from the end of the sliding locking portion 352 on the other side X2 in the first direction X to one side Z1 in the third direction Z. Cover-side locking portion 35a is provided on one side X1 in the first direction X, and cover-side locking portions 35b, 35c, and 35d are provided sequentially toward the other side X2 in the first direction X. Cover-side locking portions 35a to 35c are located on one side Z1 in the third direction Z than adjacent cover-side locking portions 35b to 35d on the other side X2 in the first direction X. Furthermore, the cover-side locking portions 35a to 35d are provided sequentially toward the other side X2 in the first direction X, such that the position in the third direction Z is located on one side Z1. That is, the cover-side locking portions 35a to 35d are provided offset along the third direction Z. In other words, the locking parts 35a to 35d on the cover side are arranged in a stepped pattern (see also Figures 10 and 12).

[0027] As mentioned above, the base-side locking portions 25a to 25d (locking receiving portions 25a2 to 25d2) are also offset along the third direction Z. That is, the pair of cover-side locking portions 35 and base-side locking portions 25, specifically the pair of cover-side locking portions 35a to 35d and base-side locking portions 25a to 25d that lock together, are arranged in multiple configurations along the first direction X and offset along the third direction Z.

[0028] Each cover side portion 32 is provided with a flexible portion 32c formed by providing two slits 32b from the end of the other side X2 in the first direction X of each cover side portion 32, and a locking projection 32d projecting from the tip of the flexible portion 32c. The flexible portion 32c is formed to be flexible and project outward from the cover side portion 32 toward the other side X2 in the first direction X. The locking projection 32d is provided projecting inward along the second direction Y from the flexible portion 32c and locks onto the locking projection 22b of the base member 20. One side X1 in the first direction X of the locking projection 32d has an inclined sliding contact portion 32d1. The tip of the locking projection 32d, i.e., the other side X2 in the first direction X of the locking projection 32d, has a flat contact surface 32d2.

[0029] As shown in Figure 7, the leaf spring 40 is provided between the support portion 31 of the cover 30 and the second core 12, and biases the second core 12 toward the first core 11 along the third direction Z. More specifically, the leaf spring 40 is formed in a mountain shape such that its approximate center in the first direction X is convex toward the other side Z2 in the third direction Z, and the top of this mountain shape abuts against the surface of the second core 12 on one side Z1 in the third direction Z. When the space between the support portion 31 of the cover 30 and the second core 12 is narrowed, the two legs 42 of the leaf spring 40 spread apart, and an elastic force is generated in the leaf spring 40. Since the cover 30 is fixed to the base member 20 and the first core 11 is supported by the bottom portion 21 of the base member 20, the leaf spring 40 is supported by the support portion 31 and biases the second core 12.

[0030] The cover 30 can be locked to the base member 20 by sliding it. When the cover 30 is locked to the base member 20, the first core 11 and the second core 12 of the magnetic core 10 are held in contact with each other, as described above. The sliding operation of the cover 30 is performed as follows. As shown in Figure 8, first, the first core 11, the bobbin 50, and the second core 12 are housed in the base member 20. Briefly, the first core 11, with its contact surfaces 10a and 10b facing one side Z1 of the third direction Z, is housed in the base member 20. The first core 11 is then supported by the bottom 21 (core support portion 21a) of the base member 20. After that, the two bobbins 50 are placed on the first core 11, and the second core 12 is housed in the base member 20 so that it comes into contact with the first core 11. Then, the busbars 100 are inserted through each of the two busbar insertion passages 58 formed by the bobbins 50 that are positioned opposite each other.

[0031] Furthermore, as shown in Figure 5, a leaf spring 40 is placed on the cover 30 on the other side Z2 of the third direction Z of the support portion 31. The cover 30 with the leaf spring 40 set is assembled to the base member 20, which houses the magnetic core 10, etc., from one side Z1 to the other side Z2 (towards the base member 20) in the third direction Z, as shown in Figure 8. At this time, the cover 30 is assembled with the arrow direction of the arrow indicator portion 31b of the cover 30 facing one side X1 of the first direction X. This results in the state shown in Figure 9.

[0032] Here, in the state shown in Figure 9, the position of the cover 30 in the first direction X relative to the base member 20 is the position where the cover-side locking portions 35a to 35d are inserted between the multiple base-side locking portions 25a to 25d, as shown in Figure 10. Furthermore, the position of the cover 30 in the second direction Y relative to the base member 20 is, referring to Figure 6, the position where the cover side portion 32 of the cover 30 is inserted into the space S1 between the side wall portion 22 of the base member 20 and the regulating rib 23. That is, the regulating rib 23 is positioned on the outside of the cover side portion 32 in the second direction Y. Here, the tip portion of the cover side portion 32 is inserted into the space S1. At this time, as shown in Figure 11, the locking projection 32d of the cover 30 is located on the other side X2 in the first direction X relative to the locking projection 22b of the base member 20. In other words, the sliding contact portion 32d1 of the locking projection 32d and the inclined surface 22b2 of the locking ridge 22b are positioned opposite each other.

[0033] Then, the cover 30 is moved to one side X1 in the first direction X relative to the base member 20 by a sliding operation. Here, when no elastic force is generated in the leaf spring 40, the sliding locking portion 352 of the cover-side locking portions 35a to 35d may be located to one side in the third direction Z than the position shown in Figure 10. Therefore, when sliding the cover 30, the sliding operation is performed while pushing the cover 30 to the other side Z2 in the third direction Z. The leaf spring 40 moves together with the cover 30 because its movement is restricted by the leaf spring projection 34 on the cover 30.

[0034] As the cover 30 is slid, as shown in Figure 12, the surface of each slide locking portion 352 of the cover-side locking portions 35a to 35d on one side Z1 in the third direction Z comes into contact with the surface of the locking receiving portions 25a2, 25b2, 25c2, 25d2 of the base-side locking portions 25a to 25d, which are located on one side X1 in the first direction X, on the other side Z2 in the third direction Z. Since the cover 30 is biased toward one side Z1 in the third direction Z relative to the base member 20, each slide locking portion 352 presses against the locking receiving portions 25a2, 25b2, 25c2, 25d2. In this way, the cover-side locking portion 35 and the base-side locking portion 25 lock together. That is, the base-side locking portion 25 and the cover-side locking portion 35 lock together as the cover 30 and the base member 20 move relative to each other so that they move closer together along the first direction X. The locking of the cover-side locking portion 35 and the base-side locking portion 25 secures the support portion 31 of the cover 30 relative to the base member 20, particularly in the third direction Z. At this time, an elastic force is generated in the leaf spring 40. Therefore, the leaf spring 40 biases the second core 12 toward the first core 11 supported by the base member 20 along the third direction Z. In this way, the first core 11 and the second core 12 come into contact with each other at their contact surfaces 10a and 10b and are securely held in place.

[0035] Furthermore, as shown in Figure 13, when the cover 30 is slid, the locking projection 32d of the cover 30 moves to one side X1 in the first direction X, causing the sliding contact portion 32d1 of the locking projection 32d to slide against the inclined surface 22b2 of the locking ridge 22b and to move over the locking ridge 22b. Once the locking projection 32d moves over the locking ridge 22b, the restoring force due to the elastic bending of the flexible portion 32c causes the locking projection 32d to be positioned on one side X1 in the first direction X of the locking ridge 22b. At this point, the contact surface 32d2 at the tip of the locking projection 32d becomes capable of contacting the locking surface 22b1 of the locking ridge 22b, and the locking projection 32d and the locking ridge 22b become locked together. The locking projection 32d and the locking ridge 22b restrict the cover 30 from moving along the first direction X (movement toward the other side X2).

[0036] The magnetic material unit 1 described above includes a magnetic material core 10 formed in an annular shape around a first direction X and divided along a second direction Y intersecting the first direction X, with the first core 11 and the second core 12 in contact along a third direction Z intersecting the first direction X and the second direction Y, a base member 20 having a bottom portion 21 that houses the magnetic material core 10 and supports the first core 11, and a side wall portion 22 provided on the side of the magnetic material core 10 in the second direction Y, and a support portion 31 provided facing the second core 12 in the third direction Z, and The device comprises a cover 30 having a cover side portion 32 that is provided opposite to the side wall portion 22 in a second direction Y, and a leaf spring 40 which is a biasing member provided between the support portion 31 and the second core 12 and biasing the second core 12 toward the first core 11 along a third direction Z. The side wall portion 22 is provided with a base-side locking portion 25, and the cover side portion 32 is provided with a cover-side locking portion 35. The base-side locking portion 25 and the cover-side locking portion 35 are locked together when the cover 30 and the base member 20 move relative to each other in a direction that moves toward each other along a first direction X.

[0037] As a result, the magnetic unit 1 can properly hold the magnetic core 10 by firmly bringing the first core 11 and the second core 12 into contact with each other through a simple sliding operation of the cover 30.

[0038] For example, the attachment of the cover 30 that holds the leaf spring 40 to the base member 20 may be configured such that the cover 30 is attached to the base member 20 so as to press the leaf spring 40 from one side Z1 to the other side Z2 in the third direction Z. In this case, the locking of the cover 30 and the base member 20 may be configured such that the cover 30 has a flexible portion that is long in the third direction Z, a locking portion is provided at the tip of the flexible portion, and the locking portion is locked to a locking portion provided on the base member 20. In this case, the direction in which the flexible portion extends and the direction in which the second core 12 is biased are the same in the third direction Z, so the reaction force of the leaf spring 40 is constantly applied to the flexible portion.

[0039] However, in this embodiment, the base-side locking portion 25 and the cover-side locking portion 35 are locked together by sliding the cover 30, so that the base-side locking portions 25a to 25b and the cover-side locking portions 35a to 35d, which have a non-flexible structure, can be used, and the holding force of the cover 30 in the direction of detachment due to the reaction force of the leaf spring 40 (towards one side Z1 of the third direction Z) can be improved.

[0040] Furthermore, the base member 20 is provided with a restricting rib 23 positioned on the outside of the cover side portion 32 in the second direction Y, which restricts the outward movement of the cover side portion 32 in the second direction Y. As a result, even if the cover side portion 32 is prone to bending in the substantially U-shaped cover 30, it is possible to restrict the movement of the cover side portion 32 in the direction of opening due to external force, thereby making the locking of the base side locking portion 25 and the cover side locking portion 35 more secure. Moreover, since the restriction of the cover side portion 32 by the restricting rib 23 is performed at the tip portion of the cover side portion 32, the opening of the cover side portion 32 can be suppressed even more reliably.

[0041] Furthermore, the side wall portion 22 is provided with a V-shaped locking projection 22b extending along the third direction Z, and the cover side portion 32 is provided with a flexible portion 32c that is formed to be flexible and project along the first direction X, and a locking projection 32d that projects from the flexible portion 32c and engages with the locking projection 22b when the base-side locking portion 25 and the cover-side locking portion 35 are locked together. This allows the cover 30 to be locked to the base member 20 when the base-side locking portion 25 and the cover-side locking portion 35 are locked together. Moreover, since the direction in which the flexible portion 32c projects is the first direction X, which is different from the direction of release due to the reaction force of the leaf spring 40 (the direction toward one side Z1 of the third direction Z), it is not constantly subjected to a strong force, so the holding force between the locking projection 22b and the locking projection 32d can be minimized, and improved workability due to reduced insertion force is also expected.

[0042] Furthermore, the pair of cover-side locking portions 35 and base-side locking portions 25 are arranged in multiple configurations along the first direction X as cover-side locking portions 35a to 35d and base-side locking portions 25a to 25d, and are offset along the third direction Z. As a result, the reaction force of the leaf spring 40 acting on the cover side portion 32 via the cover-side locking portions 35a to 35d is not applied linearly along the first direction X but is distributed, allowing the cover side portion 32 to be made thinner.

[0043] Furthermore, the magnetic material unit according to the embodiments of the present invention described above is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

[0044] In the above description, the base-side locking portion 25 and the cover-side locking portion 35 were described as having four base-side locking portions 25a to 25d and four cover-side locking portions 35a to 35d, respectively, but they can be composed of one or more base-side locking portions and one or more cover-side locking portions. Also, a leaf spring 40 was used as the biasing member to bias the second core 12, but other biasing members such as coil springs can also be used.

[0045] The magnetic unit according to this embodiment may be constructed by appropriately combining the components of the embodiments and modified examples described above. [Explanation of Symbols]

[0046] 1: Magnetic Unit 10: Magnetic core 11: First Core 12: Second Core 20: Base component 21: Bottom 22: Side wall section 22b: Locking protrusion 23: Regulatory Ribs 25: Base-side locking part 30: Cover 31: Support part 32: Side of cover 32c: Flexible part 32d: Locking protrusion 35: Cover-side locking part 52a: Rib X: 1st direction Y: Second direction Z: 3rd direction

Claims

1. A magnetic core comprising a first core and a second core formed in an annular shape around a first direction and divided along a second direction intersecting the first direction, wherein the first core and the second core are in contact along a third direction intersecting the first and second directions, A base member having a bottom portion that houses the magnetic core and supports the first core, and a side wall portion provided on the side of the magnetic core in the second direction, A cover having a support portion provided facing the second core in the third direction, and a cover side portion provided facing the side wall portion in the second direction, A biasing member is provided between the support portion and the second core, and biases the second core toward the first core along the third direction, Equipped with, The aforementioned side wall portion is provided with a base-side locking portion. A cover-side locking portion is provided on the cover side. The base-side locking portion and the cover-side locking portion are locked together by the cover and the base member moving relative to each other in a direction that brings them closer together along the first direction. Magnetic material unit.

2. The base member is provided with a restricting rib that is positioned on the outside of the cover side in the second direction and restricts the outward movement of the cover side in the second direction. The magnetic material unit according to claim 1.

3. The side wall portion is provided with a locking projection with a V-shaped cross-section extending along the third direction. The side portion of the cover is provided with a flexible portion that protrudes along the first direction and is formed to be flexible, and a locking projection that protrudes from the flexible portion and engages with the locking projection when the base-side locking portion and the cover-side locking portion are locked together. A magnetic material unit according to claim 1 or claim 2.

4. The pair of cover-side locking portions and the base-side locking portions are arranged in multiples along the first direction and offset along the third direction. A magnetic material unit according to claim 1 or claim 2.

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