Bobbin and transformer

Abstract

To provide a coil device that is easily assembled and excellent in reliability even if the coil device has a plurality of cores.SOLUTION: A bobbin of a coil device has a main bobbin 40 and an auxiliary bobbin 60. The main bobbin 40 is provided with a main core part 50, a first main bobbin flange 42 arranged at one end of the main core part 50, and a second main bobbin flange 52 arranged at the other end of the main core part 50. The auxiliary bobbin 60 is provided with an auxiliary core part 70, a first auxiliary bobbin flange 62 arranged at one end of the auxiliary core part 70, and a second auxiliary bobbin flange 72 arranged at the other end of the auxiliary core part 70. A main bobbin connection part 43 is formed at a portion in a circumferential direction of the first main bobbin flange 42. An auxiliary bobbin connection part 63 is formed at a position in the circumferential direction of the first auxiliary bobbin flange 62 corresponding to the main bobbin connection part 43. The main bobbin connection part 43 and the auxiliary bobbin connection part 63 are connected with each other so as to allow the auxiliary bobbin 60 to rotate relative to the main bobbin 40.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a coil device in which a plurality of cores can be arranged along an axis. [Background technology]

[0002] Patent Document 1 listed below discloses a wire-wound coil device in which three cores are arranged along an axis.

[0003] However, in the coil device shown in Patent Document 1, the bobbin on which the wire is wound and the three cores are arranged in series is completely divided into at least two pieces, so after winding a separate wire onto each bobbin, it is necessary to attach a core corresponding to each bobbin, and then combine the bobbins and cores to connect the ends of the wire wound around each bobbin outside the core. Furthermore, the ends of the wire wound around each bobbin are configured so that they cannot be connected together until the core is attached, which makes it difficult to assemble the coil device and reduces reliability. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-54549 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coil device that is easy to assemble and has excellent reliability even when it is a coil device having a plurality of cores. [Means for solving the problem]

[0006] In order to achieve the above object, a coil device according to the present invention comprises: The main bobbin, an auxiliary bobbin disposed at one first end along the axis of the main bobbin; a first core disposed between the first end of the main bobbin and the first end of the auxiliary bobbin, a continuous wire is wound around the main winding core of the main bobbin and the auxiliary winding core of the auxiliary bobbin; a connecting portion including a portion through which a middle portion of the wire passes is formed between the main bobbin and the auxiliary bobbin, the connecting portion is disposed at a portion of the first end of the main bobbin in the circumferential direction, With the wire continuously wound around the main winding core and the auxiliary winding core, the auxiliary bobbin rotates relative to the main bobbin, using the middle part of the wire or part of the connecting part as a rotation fulcrum, opening the insertion hole of the main winding core so that the leg part of the first core can be inserted into the insertion hole.

[0007] In the coil device of the present invention, a connecting portion is formed between the main bobbin and the auxiliary bobbin, including a portion through which the intermediate portion of the wire passes, and the connecting portion is disposed at a portion in the circumferential direction of the first end of the main bobbin. Therefore, in the coil device of the present invention, the auxiliary bobbin rotates relative to the main bobbin, using the intermediate portion of the wire or a portion of the connecting portion as a rotation fulcrum, to open the insertion hole of the main winding core portion, and the leg portion of the first core can be inserted into the insertion hole. As a result, after a single wire is continuously wound around the main bobbin and the auxiliary bobbin, the auxiliary bobbin is rotated relative to the main bobbin to open the insertion hole of the main winding core portion. The insertion hole can be opened and the legs of the first core can be inserted into the insertion hole.

[0008] After inserting the legs of the first core into the insertion holes, the auxiliary bobbin can be rotated in the opposite direction relative to the main bobbin to sandwich the base of the first core between the first end of the main bobbin and the first end of the auxiliary bobbin. A second core can then be attached to the second end of the main bobbin opposite the first end, and before, after, or simultaneously with this, a third core can be attached to the second end of the auxiliary bobbin opposite the first end. The multiple cores consisting of the first core, second core, and third core can be arranged to form a magnetic circuit along the axis.

[0009] In this way, with the coil device of the present invention, even if the coil device has multiple cores, there is no need to connect the ends of the wires together after the cores are attached, making it extremely easy to assemble the coil device and improving the reliability of the coil device.

[0010] Preferably, the connecting portion is a main bobbin connecting portion formed on a part of a circumferential direction of a first main bobbin flange provided at the first end of the main bobbin; and an auxiliary bobbin connecting portion formed on a portion of the circumferential direction of a first auxiliary bobbin flange provided at the first end of the auxiliary bobbin. The main bobbin connecting portion and the auxiliary bobbin connecting portion may be configured to be separable, or may be integrally molded and connected to each other so as to be relatively rotatable via a thin portion that serves as a pivot point.

[0011] Preferably, the main bobbin connecting portion and the auxiliary bobbin connecting portion have a communication groove formed at a corresponding position, through which a midpoint of the wire passes. By passing the midpoint of the wire through the communication groove, it becomes possible to wind the wire continuously around the main winding core and the auxiliary winding core using a single wire.

[0012] The connecting portion may have a combination of a detachably rotatable pivot pin and a fulcrum receiver. When the main bobbin connecting portion and the auxiliary bobbin connecting portion are configured to be separable, for example, either the pivot pin or the fulcrum receiver may be provided on the main bobbin connecting portion, and the other may be provided on the auxiliary bobbin connecting portion. With this configuration, the auxiliary bobbin can be rotated relative to the main bobbin using the pivot pin as a fulcrum to open the insertion hole of the main winding core portion and insert the leg of the first core into the insertion hole.

[0013] The connecting portion may be formed by the intermediate portion of the wire itself, and is preferably disposed at a portion of the circumference of the first end of the main bobbin. That is, the intermediate portion of the wire itself may be the connecting portion, and the intermediate portion of the wire itself may rotatably connect the main bobbin and the auxiliary bobbin, in which case the intermediate portion of the wire itself serves as the rotation fulcrum.

[0014] However, when the main bobbin and the auxiliary bobbin are rotatably connected by the middle portion of the wire itself, it is preferable to use a jig to temporarily fix the auxiliary bobbin to the main bobbin during the wire winding operation. Alternatively, it is preferable that the main bobbin and / or the auxiliary bobbin have a fitting portion for temporarily fixing the main bobbin and the auxiliary bobbin.

[0015] For example, the connecting portion may have a combination of a fulcrum-side fitting convex portion and a fulcrum-side fitting concave portion that can be detachably fitted together. Alternatively, a combination of an anti-fulcrum-side fitting convex portion and an anti-fulcrum-side fitting concave portion that can be detachably fitted together may be provided between the main bobbin and the auxiliary bobbin that are located on the opposite side of the connecting portion along an axis perpendicular to the axial center of the main bobbin.

[0016] The coil device may further include a sub-auxiliary bobbin disposed at the other second end along the axis of the main bobbin. A separate continuous wire different from the wire may be wound around the main bobbin. A separate connecting portion including a portion through which a middle portion of the separate wire passes may be formed between the main bobbin and the sub-auxiliary bobbin.

[0017] Preferably, the separate connecting portion is disposed at a portion of the circumferential direction of the second end of the main bobbin. Also, preferably, with the separate wire continuously wound around the main winding core portion and the sub-auxiliary winding core portion, the sub-auxiliary bobbin rotates relative to the main bobbin, using an intermediate portion of the separate wire or a portion of the separate connecting portion as a rotation fulcrum. With this configuration, an insertion hole in the main winding core portion can be opened, and a leg portion of a second core different from the first core can be inserted into the insertion hole.

[0018] The separate connecting portion between the main bobbin and the auxiliary sub-bobbin can have the same structure as the connecting portion between the main bobbin and the auxiliary bobbin described above, and provides the same effects.

[0019] For example, after inserting the legs of the second core into the insertion hole, the sub-auxiliary bobbin can be rotated relative to the main bobbin in the closing direction, opposite to the opening direction, to sandwich the base of the second core between the second end of the main bobbin and the second end of the sub-auxiliary bobbin. Before, during, or simultaneously with this, the first core can be attached between the main bobbin and the auxiliary bobbin, as described above. After this, the third core can be attached to the second end of the auxiliary bobbin opposite the first end, and the fourth core can be attached to the outer end of the sub-auxiliary bobbin before and after that. The multiple cores consisting of the first core, second core, third core, and fourth core can be arranged to form a magnetic circuit along the axis. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is an overall perspective view of a coil device according to one embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the coil device shown in FIG. 1 (with the auxiliary bobbin open relative to the main bobbin). [Figure 3A] FIG. 3A is a plan view of the coil device shown in FIG. [Figure 3B] FIG. 3B is a plan view of another embodiment of the coil device shown in FIG. 3A. [Figure 4A] 4A is a cross-sectional view of the coil device shown in FIG. 1 taken along line IVA-IVA. [Figure 4B] FIG. 4B is a cross-sectional view of another embodiment of the coil device shown in FIG. 4A. [Figure 5] FIG. 5 is a cross-sectional view of the coil device shown in FIG. 1 taken along line VV. [Figure 6] 6 is an exploded perspective view of the main bobbin and the auxiliary bobbin of the coil device shown in FIG. [Figure 7]7 is an exploded perspective view of the main bobbin and the auxiliary bobbin of the coil device shown in FIG. 6, seen from another direction. [Figure 8A] FIG. 8A is a side view of a portion of the coil device shown in FIG. 2 (with the auxiliary bobbin open relative to the main bobbin). [Figure 8B] FIG. 8B is a side view of a portion (with the auxiliary bobbin open relative to the main bobbin) of yet another embodiment of the coil device shown in FIG. 8A. [Figure 9] FIG. 9 is a perspective view of a portion of the coil device shown in FIG. 2 (with the auxiliary bobbin open relative to the main bobbin). DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, the present invention will be described based on the embodiments shown in the drawings.

[0022] First embodiment As shown in FIG. 1, the coil device 1 of the present invention is used, for example, as an on-board charging transformer, a charging station transformer, an ESS (Energy Storage System), etc. As shown in FIG. 2, the coil device 1 includes a main bobbin 40, an auxiliary bobbin 60, and a first core 1. 0, a second core 20, a third core 30, a first wire 80, and a second wire 90. The first wire 80 and the second wire 90 are wound around the main bobbin 40, and the second wire 90 is wound around the auxiliary bobbin 60. In the drawings, the X-axis, Y-axis, and Z-axis are perpendicular to one another. In this embodiment, the direction away from the center of the coil device 1 on the X-axis, Y-axis, and Z-axis may be referred to as the outside, and the direction toward the center may be referred to as the inside.

[0023] 1, the main bobbin 40 and the auxiliary bobbin 60 are arranged side by side along the X-axis, and the first core 10 is arranged between one end of the main bobbin 40 along the X-axis and one end of the auxiliary bobbin 60 along the X-axis. The second core 20 is arranged at the other end of the main bobbin 40 along the X-axis. The third core 30 is arranged at the other end of the auxiliary bobbin 60 along the X-axis.

[0024] As shown in FIG. 2, in this embodiment, the first core 10 has a symmetrical shape along the Z-axis and the Y-axis. The first core 10 has a first base portion 13. The first base portion 13 has first outer legs 12, 12 on both sides along the Y-axis, protruding along the X-axis. The first base portion 13 also has a first insertion leg portion (center leg portion) 11 protruding along the X-axis approximately midway between the first outer legs 12, 12. In other words, the first core 10 is a so-called E-shaped core. Note that the first core 10 is not limited to an E-shaped core and may be a U-shaped core, or two U-shaped cores may be joined by the two-dot chain line shown in FIG. 2.

[0025] 2, first base portion 13 has a predetermined thickness in the X-axis direction and a surface parallel to the YZ plane. First base portion 13 has inclined surfaces on the upper and lower sides along the Z-axis that extend from the ends where first outer legs 12, 12 are connected toward the center of first base portion 13 on the Y-axis.

[0026] As shown in Fig. 2, the outer surfaces of the first outer legs 12, 12 along the Y axis are flat. On the other hand, the inner surfaces of the first outer legs 12, 12 along the Y axis are curved. Furthermore, the end surfaces of the first outer legs 12, 12 in the Z axis direction are flat surfaces perpendicular to the Z axis. The shape of the inner surfaces of the first outer legs 12, 12 is not limited, but it is preferable that the shape corresponds to the outline of the surface perpendicular to the X axis of the first main bobbin flange 42 of the main bobbin 40.

[0027] 2, the first insertion leg portion 11 has an outer periphery parallel to the X-axis. A cross section of the first insertion leg portion 11 perpendicular to the X-axis has a generally rounded rectangular shape, which corresponds to the shape of the main bobbin insertion hole 51 of the main bobbin 40.

[0028] 5, the end face in the X-axis direction of the first insertion leg 11 is formed to be flush with the end faces in the X-axis direction of the first outer legs 12, 12. The position of the end face in the X-axis direction of the first insertion leg 11 is not limited to this. For example, the end face in the X-axis direction of the first insertion leg 11 may be formed closer to the first base portion 13 than the end faces in the X-axis direction of the first outer legs 12, 12, resulting in a step between the end faces in the X-axis direction of the first outer legs 12, 12.

[0029] As shown in FIG. 2, in this embodiment, the second core 20 has a symmetrical shape along the Z-axis and the Y-axis. The second core 20 has a second base portion 23. The second base portion 23 has second outer legs 22, 22 on both sides along the Y-axis, protruding along the X-axis. The second base portion 23 also has a second insertion leg portion (center leg portion) 21 protruding along the X-axis approximately midway between the second outer legs 22, 22. In other words, the second core 20 is a so-called E-shaped core. Note that the second core 20 is not limited to an E-shaped core and may be a U-shaped core, or two U-shaped cores may be joined by the two-dot chain line shown in FIG. 2.

[0030] 2, the second base portion 23 has a predetermined thickness in the X-axis direction and a surface parallel to the YZ plane. The second base portion 23 has second outer legs 24 extending upward and downward along the Z-axis. The second base portion 23 has an inclined surface extending from the end where the first and second base portions 22 and 22 are connected to the center of the Y axis.

[0031] As shown in Fig. 2, the outer surfaces of the second outer legs 22, 22 along the Y axis are flat. On the other hand, the inner surfaces of the second outer legs 22, 22 along the Y axis are curved. Furthermore, the end surfaces of the second outer legs 22, 22 in the Z axis direction are flat surfaces perpendicular to the Z axis. The shape of the inner surfaces of the second outer legs 22, 22 is not limited, but it is preferable that the shape corresponds to the outline of the surface perpendicular to the X axis of the second main bobbin collar 52 of the main bobbin 40.

[0032] 2, the second insertion leg portion 21 has an outer periphery parallel to the X-axis. A cross section of the second insertion leg portion 21 perpendicular to the Z-axis has a generally rounded rectangular shape, which corresponds to the shape of the main bobbin insertion hole 51 of the main bobbin 40.

[0033] 5, the end face in the X-axis direction of the second insertion leg 21 is formed to be flush with the end faces in the X-axis direction of the second outer legs 22. The position of the end face in the X-axis direction of the second insertion leg 21 is not limited to this. For example, the end face in the X-axis direction of the second insertion leg 21 may be formed closer to the second base portion 23 than the end faces in the X-axis direction of the second outer legs 22, so that a step is formed between the end face in the X-axis direction of the second outer legs 22.

[0034] 5, the end face in the X-axis direction of the second insertion leg 21 contacts the end face in the X-axis direction of the first insertion leg 11, and the end faces in the X-axis direction of the second outer legs 22 contact the end faces in the X-axis direction of the first outer legs 12, 12, but this is not limited to this. Gaps may be formed in the end faces in the X-axis direction of the first insertion leg 11, second insertion leg 21, first outer legs 12, 12, and second outer legs 22, 22 by adjusting the lengths in the X-axis direction.

[0035] As shown in FIG. 2, in this embodiment, the third core 30 has a symmetrical shape along the Z-axis and the Y-axis. The third core 30 has a third base portion 33. The third base portion 33 has third outer legs 32, 32 on both sides along the Y-axis, protruding along the X-axis. The third base portion 33 also has a third insertion leg portion (center leg portion) 31 protruding along the X-axis approximately midway between the third outer legs 32, 32. In other words, the third core 30 is a so-called E-shaped core. Note that the third core 30 is not limited to an E-shaped core and may be a U-shaped core, or two U-shaped cores may be joined by the two-dot chain line shown in FIG. 2.

[0036] 2, the third base portion 33 has a predetermined thickness in the X-axis direction and a surface parallel to the YZ plane. The third base portion 33 has inclined surfaces on the upper and lower sides along the Z-axis that extend from the ends where the third outer legs 32 are connected toward the center of the third base portion 33 on the Y-axis.

[0037] As shown in Fig. 2, the outer surfaces of the third outer legs 32, 32 along the Y axis are flat. On the other hand, the inner surfaces of the third outer legs 32, 32 along the Y axis are curved. Furthermore, the end surfaces of the third outer legs 32, 32 in the Z axis direction are flat surfaces perpendicular to the Z axis. The shape of the inner surfaces of the third outer legs 32, 32 is not limited, but it is preferable that the shape corresponds to the outline of the surface perpendicular to the X axis of the first auxiliary bobbin flange 72 of the auxiliary bobbin 60.

[0038] 2, the third insertion leg portion 31 has an outer periphery parallel to the X-axis. A cross section of the third insertion leg portion 31 perpendicular to the X-axis has a generally rounded rectangular shape, which corresponds to the shape of the auxiliary bobbin insertion hole 71 of the auxiliary bobbin 60.

[0039] 5, the end face of the third insertion leg 31 in the Z-axis direction is formed to be flush with the end faces of the third outer legs 32, 32 in the X-axis direction. For example, the end face of the third insertion leg portion 31 in the X-axis direction may be formed closer to the third base portion 33 than the end faces of the third outer legs 32, 32 in the X-axis direction, creating a step between the end faces of the third outer legs 32, 32 in the X-axis direction.

[0040] 5, the end face of the third insertion leg 31 in the X-axis direction and the end faces of the second outer legs 22, 22 in the X-axis direction are in contact with the first base portion 13, but are not limited to this. The lengths of the third insertion leg 31 and the third outer legs 32, 32 in the X-axis direction may be adjusted to form a gap between the end faces of each of them in the X-axis direction.

[0041] 6, the main bobbin 40 has a main bobbin body 50 (main winding core) extending along the X-axis. A main bobbin insertion hole 51 is formed in the main bobbin body 50 along the X-axis. The main bobbin 40 also has a first main bobbin collar 42 at one end of the main bobbin body 50 in the X-axis direction, and a second main bobbin collar 52 at the other end.

[0042] A main bobbin connecting portion 43 that connects to the auxiliary bobbin 60 is formed on the upper portion of the first main bobbin flange 42 along the Z axis. Tapered surfaces 43a, 43a that are inclined toward the center of the Y axis are formed on the lower portion of the main bobbin connecting portion 43 along the Z axis. The tapered surfaces 43a, 43a are formed so as to contact the upper inclined surface along the Z axis of the first base portion 13 of the first core 10 shown in FIG. 2. In addition, the main bobbin connecting portion 43 has an R-shaped curved surface from the surface on the auxiliary bobbin 60 side along the X axis to the upper surface along the Z axis.

[0043] 6, a main bobbin connecting groove 45 is formed in approximately the center of the Y axis of the main bobbin connecting portion 43. The main bobbin connecting groove 45 is cut out at its upper portion along the Z axis, and the bottom surface of the main bobbin connecting groove 45 is approximately flush with the upper surface of the main bobbin body 50 along the Z axis.

[0044] 6, a pair of main bobbin side fitting portions 46a, 46b are formed on the end surface of the main bobbin connecting portion 43 on the auxiliary bobbin 60 side along the X axis, sandwiching the main bobbin communication groove 45 along the Y axis. The main bobbin side fitting portions 46a, 46b are recessed in the X axis direction.

[0045] As shown in Fig. 6, fulcrum receivers 47a and 47b are formed on both ends of the main bobbin connecting portion 43 along the Y axis. The fulcrum receivers 47a and 47b protrude along the X axis toward the auxiliary bobbin 60. The fulcrum receivers 47a and 47b have holes that hold the rotation fulcrum pins 67a and 67b shown in Fig. 7.

[0046] 6, a first main bobbin convex portion 44 that contacts the first auxiliary bobbin flange 62 of the auxiliary bobbin 60 is formed on the lower portion along the Z axis of the first main bobbin flange 42. Tapered surfaces 44a, 44a that are inclined toward the center of the Y axis are formed on the upper portion along the Z axis of the first main bobbin convex portion 44. The tapered surfaces 44a, 44a are formed so as to contact the lower inclined surface along the Z axis of the first base portion 13 of the first core 10 shown in FIG.

[0047] 6, a main bobbin side fitting portion 46c is formed on the end surface of the first main bobbin convex portion 44 on the auxiliary bobbin 60 side along the X axis. The main bobbin side fitting portion 46c is disposed in the center along the Y axis and is recessed in the X axis direction.

[0048] 7, a lead pull-out base 53 is formed above the second main bobbin flange 52 along the Z axis. Tapered surfaces 53a, 53a that are inclined toward the center of the Y axis are formed below the lead pull-out base 53 along the Z axis. The tapered surfaces 53a, 53a are formed so as to come into contact with the upper inclined surface along the Z axis of the second base portion 23 of the second core 20 shown in FIG.

[0049] The lead drawer 53 has lead grooves 55a to 55d extending along the X axis and extending along the Y axis. The lead grooves 55a to 55d are cut out at their upper portions along the Z axis, and the bottom surfaces of the lead grooves 55a to 55d are positioned higher than the upper surface of the main bobbin body 50 along the Z axis.

[0050] 7, a second main bobbin convex portion 54 is formed on the lower portion along the Z axis of the second main bobbin flange 52. Tapered surfaces 54a, 54a inclined toward the center of the Y axis are formed on the upper portion along the Z axis of the second main bobbin convex portion 54. The tapered surfaces 54a, 54a are formed so as to come into contact with the lower inclined surface along the Z axis of the second base portion 23 of the second core 20 shown in FIG.

[0051] 7, the auxiliary bobbin 60 has an auxiliary bobbin body 70 extending along the X-axis direction. An auxiliary bobbin insertion hole 71 is formed in the auxiliary bobbin body 70 along the X-axis. The auxiliary bobbin 60 also has a first auxiliary bobbin flange 62 at one end of the auxiliary bobbin body 70 on the X-axis side, and a second auxiliary bobbin flange 72 at the other end.

[0052] An auxiliary bobbin connecting portion 63 that connects to the main bobbin 40 is formed on the upper portion of the first auxiliary bobbin flange 62 along the Z axis. Tapered surfaces 63a, 63a that are inclined toward the center of the Y axis are formed on the lower portion of the auxiliary bobbin connecting portion 63 along the Z axis. The tapered surfaces 63a, 63a are formed so as to contact the upper inclined surface along the Z axis of the first base portion 13 of the first core 10 shown in FIG. 2. The auxiliary bobbin connecting portion 63 has an R-shaped curved surface from the surface on the main bobbin 40 side along the X axis to the upper surface along the Z axis.

[0053] As shown in Fig. 7, an auxiliary bobbin side communication groove 65 is formed in approximately the center of the auxiliary bobbin connecting portion 63 in the Y-axis direction. That is, as shown in Fig. 1, the auxiliary bobbin side communication groove 65 is disposed at a position corresponding to the main bobbin communication groove 45. As shown in Fig. 7, the auxiliary bobbin side communication groove 65 has an upper portion cut out along the Z-axis, and the bottom surface of the auxiliary bobbin side communication groove 65 is approximately flush with the upper surface of the auxiliary bobbin main body 70 along the Z-axis.

[0054] As shown in Fig. 7, a pair of auxiliary bobbin side fitting portions 66a, 66b are formed on the end surface of the auxiliary bobbin connecting portion 63 on the main bobbin 40 side along the X axis, sandwiching the auxiliary bobbin side communication groove 65 along the Y axis. That is, the auxiliary bobbin side fitting portions 66a, 66b are disposed at positions corresponding to the main bobbin side fitting portions of the main bobbin connecting portion. The auxiliary bobbin side fitting portions 66a, 66b protrude in the X axis direction and can be fitted into the main bobbin side fitting portions 46a, 46b of the main bobbin connecting portion 43 shown in Fig. 6.

[0055] 7, rotation fulcrum pins 67a and 67b are formed on both ends along the Y axis of auxiliary bobbin connecting portion 63. Rotation fulcrum pins 67a and 67b protrude outward along the Y axis and are insertable into holes in fulcrum receiving portions 47a and 47b.

[0056] As shown in Fig. 7, an auxiliary bobbin side fitting portion 66c is formed on the lower portion of the first auxiliary bobbin flange 62 along the Z axis. The auxiliary bobbin side fitting portion 66c is disposed in the center along the Y axis. That is, the auxiliary bobbin side fitting portion 66c is disposed at a position corresponding to the fitting portion of the first main bobbin convex portion 44. The auxiliary bobbin side fitting portion 66c protrudes in the X axis direction and is capable of fitting with the main bobbin side fitting portion 46c of the first main bobbin convex portion 44 shown in Fig. 6.

[0057] 6, an auxiliary bobbin convex portion 73 is formed on the upper side along the Z axis of the second auxiliary bobbin flange 72. Tapered surfaces 73a, 73a that are inclined toward the center of the Y axis are formed on the lower side along the Z axis of the auxiliary bobbin convex portion 73. The tapered surfaces 73a, 73a are formed so as to come into contact with the upper inclined surface along the Z axis of the third base portion 33 of the third core 30 shown in FIG.

[0058] As shown in Fig. 6, an auxiliary bobbin convex portion 74 is formed on the lower portion along the Z axis of the second auxiliary bobbin flange 72. Tapered surfaces 74a, 74a that are inclined toward the center of the Y axis are formed on the upper portion along the Z axis of the auxiliary bobbin convex portion 74. The tapered surfaces 74a, 74a are formed so as to come into contact with the lower inclined surface along the Z axis of the third base portion 33 of the third core 30 shown in Fig. 2.

[0059] 4A, the second wire 90 is wound across the main bobbin body 50 of the main bobbin and the auxiliary bobbin body 70 of the auxiliary bobbin. The main bobbin winding portion 92 and the auxiliary bobbin winding portion 94 of the second wire 90 are connected at a midpoint 93. The midpoint 93 is arranged to pass through the main bobbin connecting groove 45 and the auxiliary bobbin side connecting groove 65.

[0060] 3A, connection terminals 97 and 98 for connecting to an external board or the like are attached to second lead portions 95 and 96 of second wire 90. Second lead portions 95 and 96 are each drawn out from main bobbin winding portion 92. Second lead portion 95 passes through lead groove 55a and is drawn outward along the X-axis. Second lead portion 96 passes through lead groove 55b and is drawn outward along the X-axis.

[0061] As shown in Fig. 4A, a first wire 80 is wound around the main bobbin winding portion 92. As shown in Fig. 3A, connection terminals 87 and 88 for connecting to an external board or the like are attached to second lead portions 85 and 86 of the first wire 80. The first lead portion 85 passes through the lead groove 55c and is drawn out along the X-axis. The first lead portion 86 passes through the lead groove 55d and is drawn out along the X-axis.

[0062] The coil device 1 of this embodiment can be assembled, for example, in the following procedure.

[0063] First, in this embodiment, the rotation fulcrum pins 67a, 67b of the auxiliary bobbin 60 shown in Fig. 6 are passed through the holes in the fulcrum receiving portions 47a, 47b of the main bobbin 40 to connect the main bobbin 40 and the auxiliary bobbin 60. Then, the main bobbin side fitting portions 46a, 46b, 46c of the main bobbin 40 are fitted with the auxiliary bobbin side fitting portions 66a, 66b, 66c of the auxiliary bobbin 60 shown in Fig. 7 to bring the first main bobbin flange 42 and the first auxiliary bobbin flange 62 into contact with each other.

[0064] 4A, the second wire 90 is wound around the main bobbin 40 and the auxiliary bobbin 60. For example, an automatic winding machine can be used for the winding.

[0065] First, the second wire 90 is wound around the outer periphery of the main bobbin body 50. As shown in FIG. 3, the second wire 90 wound around the main bobbin body 50 is passed through the main bobbin connecting groove 45 and the auxiliary bobbin side connecting groove 65. As shown in FIG. 4A, the second wire 90 passed through the auxiliary bobbin side connecting groove 65 is wound around the outer periphery of the auxiliary bobbin body 70. The second wire 90 wound around the auxiliary bobbin body 70 is passed through the main bobbin connecting groove 45 and the auxiliary bobbin side connecting groove 65 again. The second wire 90 passed through the main bobbin connecting groove 45 is wound so as to overlap the second wire 90 already wound around the main bobbin body 50. The first wire 80 is wound around the main bobbin winding portion 92 so as to overlap it.

[0066] 8A , the side of the first auxiliary bobbin collar 62 opposite the auxiliary bobbin connecting portion 63 is rotated around the rotation fulcrum pins 67a, 67b of the auxiliary bobbin connecting portion 63 so as to move away from the first main bobbin collar 42. At this time, the auxiliary bobbin side fitting portions 66a, 66b, 66c move away from the fitting portions of the first main bobbin collar 42. In this embodiment, the second wire 90 is freely bendable, and the auxiliary bobbin 60 can be rotated with the main bobbin winding portion 92 and the auxiliary bobbin winding portion 94 connected by the intermediate portion 93.

[0067] Next, the first core 10 shown in Fig. 2 is placed on the main bobbin 40. The first insertion leg 11 of the first core 10 is inserted into the main bobbin insertion hole 51 from the first main bobbin flange 42 side. At this time, the lower and upper inclined surfaces of the first base portion 13 along the Z axis come into contact with the tapered surface 43a of the connecting portion and the tapered surface 44a of the first main bobbin convex portion 44 shown in Fig. 6, respectively.

[0068] Next, the auxiliary bobbin 60 is returned to its original position, and the auxiliary bobbin side fitting portions 66a, 66b, and 66c shown in Fig. 7 are fitted into the main bobbin side fitting portions 46a, 46b, and 46c of the main bobbin 40 shown in Fig. 6. At this time, the upper inclined surface along the Z axis of the first base portion 13 shown in Fig. 2 comes into contact with the tapered surface 63a of the first auxiliary bobbin connecting portion 63.

[0069] Next, the second core 20 shown in Fig. 2 is placed on the main bobbin 40. The second insertion leg 21 of the second core 20 is inserted into the main bobbin insertion hole 51 from the second main bobbin flange 52 side. At this time, the lower and upper inclined surfaces of the second base portion 23 along the Z axis come into contact with the tapered surface 53a of the lead pull-out base 53 and the tapered surface 54a of the second main bobbin convex portion 54 shown in Fig. 7, respectively.

[0070] Next, the third core 30 shown in Fig. 2 is placed on the auxiliary bobbin 60. The third insertion leg portion 31 of the third core 30 is inserted into the auxiliary bobbin insertion hole 71 from the second auxiliary bobbin flange 72 side. At this time, the lower and upper inclined surfaces along the Z axis of the third base portion 33 come into contact with the tapered surfaces 73a and 74a of the auxiliary bobbin convex portions 73 and 74 shown in Fig. 6, respectively.

[0071] As shown in FIG. 9 , in the coil device 1 of this embodiment, the main bobbin connecting portion 43 is disposed above the first main bobbin flange 42, which is the first end of the main bobbin 40, along the Z-axis, which is a portion of the circumference of the first auxiliary bobbin flange 62, which is the first end of the auxiliary bobbin 60. The intermediate portion 93 of the second wire 90 is passed between the main bobbin connecting portion 43 and the auxiliary bobbin connecting portion 63. Therefore, in this embodiment, the auxiliary bobbin 60 can rotate relative to the main bobbin 40 around the intermediate portion 93 or a portion of the connecting portion of the second wire 90 as a rotation fulcrum, thereby opening the main bobbin insertion hole 51 of the main bobbin body 50 (main winding core portion) ( FIG. 6 ). Therefore, the legs of the first core can be inserted into the main bobbin insertion hole 51.

[0072] As a result, as shown in Figure 9, after continuously winding a single second wire 90 around the main bobbin 40 and the auxiliary bobbin 60, the auxiliary bobbin 60 can be rotated relative to the main bobbin 40 to open the main bobbin insertion hole 51 of the main bobbin body 50, and the leg portion of the first core can be inserted into the main bobbin insertion hole 51.

[0073] After inserting the legs of the first core into the main bobbin insertion hole 51, the auxiliary bobbin 60 can be rotated in the opposite direction relative to the main bobbin 40 to sandwich the base of the first core between the first main bobbin flange 42 and the first auxiliary bobbin flange 62 of the main bobbin 40. Then, the second core can be attached to the second main bobbin flange 52, which is the second end of the main bobbin located opposite the first main bobbin flange 42. Before, after, or simultaneously with this, the third core can be attached to the second auxiliary bobbin flange 72, which is the second end of the auxiliary bobbin 60 opposite the first auxiliary bobbin flange 62. The multiple cores consisting of the first core, second core, and third core can be arranged to form a magnetic circuit along the axis.

[0074] In this way, in this embodiment, even if the coil device 1 has multiple cores, there is no need to connect the ends of the wires after attaching the cores, making it extremely easy to assemble the coil device and improving the reliability of the coil device.

[0075] 5, in this embodiment, the first base portion 13 of the first core 10 is disposed between the first main bobbin flange 42 and the auxiliary bobbin flange 62. The second wire 90 is wound across the main bobbin 40 and the auxiliary bobbin 60. This configuration makes it easy to adjust leakage and easily integrate elements with multiple different functions.

[0076] 9, the main bobbin connecting portion 43 and the auxiliary bobbin connecting portion 63 have communication grooves 45, 65 formed at corresponding positions (centers along the Y axis) through which the intermediate portion 93 of the wire 90 passes. Passing the intermediate portion 93 of the wire through the communication grooves 45, 65 makes it possible to continuously wind the wire 90 around the main winding core and the auxiliary winding core using a single wire 90.

[0077] As shown in FIG. 8A , in this embodiment, the auxiliary bobbin connection portion 63 has a pivot pin 67b (67a), and the main bobbin connection portion 43 has a fulcrum receiver 47b (47a). By combining the pivot pin 67b (67a) and the fulcrum receiver 47b (47a), the auxiliary bobbin 60 is supported on the main bobbin 40, and the main bobbin 40 and the auxiliary bobbin 60 are detachably connected. Note that it is sufficient if either the pivot pin or the fulcrum receiver is provided on the main bobbin connection portion 43, and the other is the auxiliary bobbin connection portion 63. With this configuration, the auxiliary bobbin 60 can be rotated relative to the main bobbin 40 using the pivot pin as a fulcrum to open the insertion hole 51 of the main winding core portion 50 ( FIG. 6 ), and the leg portion of the first core can be inserted into the insertion hole.

[0078] Furthermore, the main bobbin 40 and the auxiliary bobbin 60 do not have to be separable, and may be integrally molded and connected to each other so as to be relatively rotatable via a thin portion that serves as a pivot point.

[0079] As shown in Fig. 6, in this embodiment, the main bobbin 40 has main bobbin side fitting portions 46a, 46b which serve as fulcrum side fitting recesses into which the main bobbin 40 can be detachably fitted. As shown in Fig. 7, the auxiliary bobbin 60 has auxiliary bobbin side fitting portions 66a, 66b which serve as fulcrum side fitting protrusions into which the main bobbin 40 can be detachably fitted.

[0080] 6, the main bobbin 40 has a main bobbin connecting portion 43c, which is an anti-fulcrum side fitting recess that can be detachably fitted on the opposite side along the Z axis from the connecting portion 43. Also, as shown in Fig. 7, the auxiliary bobbin 60 has an auxiliary bobbin side fitting portion 66c, which is an anti-fulcrum side fitting protrusion that can be detachably fitted on the opposite side along the Z axis from the connecting portion 63 of the main bobbin 40.

[0081] With this configuration, in this embodiment, the main bobbin side fitting portion and the auxiliary bobbin side fitting portion fit together, and the main bobbin 40 and the auxiliary bobbin 60 can be temporarily fixed together, facilitating the winding of the wire. Note that by using a jig for temporarily fixing the auxiliary bobbin 60 to the main bobbin 40, the winding can be easily performed even without a fitting portion.

[0082] Second embodiment As shown in Figure 8B, the coil device of this embodiment has the same configuration as the coil device 1 of the first embodiment, except for the structure of the connecting portion, and has the same operational effects. In the following explanation, explanation of overlapping parts will be omitted as much as possible, and the explanation will focus on the different parts. Furthermore, common parts in the drawings are assigned the same reference numerals.

[0083] 8B, in this embodiment, the main bobbin 40 does not have a fulcrum receiving portion, and the auxiliary bobbin 60 does not have a rotation fulcrum pin. In other words, the auxiliary bobbin connecting portion 63 is not supported by the main bobbin connecting portion 43. Therefore, in this embodiment, the connecting portion is formed by the wire intermediate portion 93 itself.

[0084] In this embodiment, the intermediate portion 93 of the wire, which serves as the connecting portion, is disposed above the first main bobbin flange 42, which is the first end of the main bobbin 40, along the Z axis in the circumferential direction. In other words, the intermediate portion 93 of the wire itself serves as the connecting portion, and the intermediate portion 43 of the wire itself rotatably connects the main bobbin 40 and the auxiliary bobbin 60, with the intermediate portion 93 of the wire itself serving as the rotation fulcrum.

[0085] In this embodiment, it is preferable to temporarily fix the auxiliary bobbin 60 to the main bobbin 40, particularly during the wire winding operation. In this embodiment, fitting portions are formed on the first main bobbin flange 42 and the first auxiliary bobbin flange 62, and the auxiliary bobbin 60 can be temporarily fixed to the main bobbin 40.

[0086] Third embodiment As shown in Fig. 4B, the coil device 2 of this embodiment has the same configuration as the coil device 1 of the first embodiment, except for the sub-auxiliary bobbin 160 and the fourth core 140, and has the same effects. In the following explanation, explanation of overlapping parts will be omitted as much as possible, and the explanation will focus on the differences. Furthermore, common parts in the drawings are assigned the same reference numerals.

[0087] In this embodiment, the fourth core 140 has a shape similar to that of the third core 30. That is, the fourth core 140 has a fourth base portion 143, a pair of fourth outer legs 142, 142 connected to the fourth base portion 143, and a fourth insertion leg portion 141 disposed between the fourth outer legs 142, 142.

[0088] As shown in Fig. 4B, the end face in the X-axis direction of the fourth insertion leg portion 141 is in contact with the second base portion 23, but is not limited to this. Also, as shown in Fig. 3B, the end faces in the X-axis direction of the fourth outer legs 142, 142 are in contact with the second base portion 23, but are not limited to this. The lengths of the fourth insertion leg portion 141 and the fourth outer legs 142, 142 in the X-axis direction may be adjusted to form a gap between the end faces of each of them in the X-axis direction.

[0089] As shown in FIG. 4B, the coil device 2 of this embodiment further includes a sub-auxiliary bobbin 160 on the second main bobbin flange 52 side, which is the other second end along the axis of the main bobbin 40 (main bobbin body 50).

[0090] In this embodiment, the second main bobbin collar 52 has a structure symmetrical along the X-axis to the first main bobbin collar 42. That is, a main bobbin connecting portion 153 is formed at the upper portion of the second main bobbin collar 52 along the Z-axis, which is symmetrical along the X-axis to the main bobbin connecting portion 43, and a second main bobbin convex portion 154 is formed at the lower portion of the second main bobbin collar 52 along the Z-axis, which is symmetrical along the X-axis to the first main bobbin convex portion 44.

[0091] Furthermore, the main bobbin connecting portion 153 is configured to connect to the sub-auxiliary bobbin connecting portion 163 of the sub-auxiliary bobbin 160. As shown in Fig. 3B, a main bobbin communication groove 155 is formed in approximately the center of the main bobbin connecting portion 153 in the Y-axis direction.

[0092] 4B, the sub-auxiliary bobbin 160 has a sub-auxiliary bobbin body 170 extending along the X-axis direction. The sub-auxiliary bobbin body 170 has a sub-auxiliary bobbin insertion hole 171 formed along the X-axis. The sub-auxiliary bobbin body 170 also has a first sub-auxiliary bobbin flange 162 at one end on the X-axis direction side and a second sub-auxiliary bobbin flange 172 at the other end.

[0093] In this embodiment, the first sub-auxiliary bobbin flange 162 has a structure symmetrical along the X axis to the first sub-auxiliary bobbin flange 62. That is, a sub-auxiliary bobbin connecting portion 163 symmetrical along the X axis to the auxiliary bobbin connecting portion 63 is formed on the upper portion of the first sub-auxiliary bobbin flange 162 along the Z axis. A first sub-auxiliary bobbin convex portion 164 is formed on the lower portion of the first sub-auxiliary bobbin flange 162 along the Z axis, and is symmetrical to the first sub-auxiliary bobbin convex portion 64 along the X axis.

[0094] The sub-auxiliary bobbin connecting portion 163 is configured to connect to the main bobbin connecting portion 153 of the main bobbin 40. As shown in Fig. 3B, a sub-auxiliary bobbin side communication groove 165 is formed in approximately the center of the sub-auxiliary bobbin connecting portion 163 in the Y-axis direction.

[0095] The second sub-auxiliary bobbin flange 172 has a configuration similar to that of the second main bobbin flange 52. That is, as shown in FIG. 4B , a lead pull-out base 173 is formed above the second sub-auxiliary bobbin flange 172 along the Z axis. A tapered surface inclined toward the center of the Y axis is formed below the lead pull-out base 173 along the Z axis. The tapered surface is formed so as to come into contact with the upper inclined surface along the Z axis of the fourth base portion 143 of the fourth core 140.

[0096] 3B, lead grooves 175a to 175d extending along the X-axis are formed side by side along the Y-axis in the lead pull-out base 173. The lead grooves 175a to 175d are cut out at their upper portions along the Z-axis, and the bottom surfaces of the lead grooves 175a to 175d are positioned higher than the upper surface along the Z-axis of the sub-auxiliary bobbin body 170 shown in FIG.

[0097] 4B, a second sub-auxiliary bobbin convex portion 174 is formed on the lower portion along the Z axis of the second sub-auxiliary bobbin flange 172. A tapered surface inclined toward the center of the Y axis is formed above the second sub-auxiliary bobbin convex portion 174 along the Z axis. The tapered surface is formed so as to come into contact with the lower inclined surface along the Z axis of the fourth base portion 143 of the fourth core 140.

[0098] As shown in Fig. 4B, the second wire 90 is wound across the main bobbin body 50 of the main bobbin and the auxiliary bobbin body 70 of the auxiliary bobbin. The main bobbin winding portion 92 and the auxiliary bobbin winding portion 94 of the second wire 90 are connected at a midpoint 93. As shown in Fig. 3B, the midpoint 93 is arranged to pass through the main bobbin connecting groove 45 and the auxiliary bobbin side connecting groove 65.

[0099] 3B, connection terminals 97 and 98 for connecting to an external board or the like are attached to second lead portions 95 and 96 of second wire 90. Second lead portions 95 and 96 are each drawn out from main bobbin winding portion 92. Second lead portion 95 passes through lead groove 175a and is drawn outward along the X-axis. Second lead portion 96 passes through lead groove 175b and is drawn outward along the X-axis.

[0100] As shown in Fig. 4B, the first wire 180 is wound across the main bobbin body 50 of the main bobbin and the sub-auxiliary bobbin body 170 of the sub-auxiliary bobbin. The main bobbin winding portion 182 and the sub-auxiliary bobbin winding portion 184 of the first wire 180 are connected by a middle portion 183. As shown in Fig. 3B, the middle portion 183 is arranged to pass through the main bobbin connecting groove 155 and the sub-auxiliary bobbin connecting groove 165.

[0101] 3B, connection terminals 187, 188 for connecting to an external board or the like are attached to first lead portions 185, 186 of first wire 180. First lead portions 185, 186 are each drawn out from sub-auxiliary bobbin winding portion 184. First lead portion 185 passes through lead groove 175c and is drawn outward along the X-axis. First lead portion 186 passes through lead groove 175d and is drawn outward along the X-axis.

[0102] As shown in FIG. 4B, in this embodiment, a continuous first wire 180 different from the second wire 90 is wound around the main bobbin body 50 (main winding core) of the main bobbin 40 and the sub-auxiliary bobbin body 170 (sub-auxiliary winding core) of the sub-auxiliary bobbin 160. Between the main bobbin 40 and the sub-auxiliary bobbin 160, separate connecting portions (main bobbin connecting portion 153 and sub-auxiliary bobbin connecting portion 163) are formed, which include a portion through which the middle portion 183 of the first wire 180 passes.

[0103] In this embodiment, the separate connecting portions (main bobbin connecting portion 153 and sub-auxiliary bobbin connecting portion 163) are disposed at a portion in the circumferential direction of the second main bobbin flange 52, which is the second end of the main bobbin 40. With the first wire 180 continuously wound around the main winding core portion (main bobbin body 50) and the sub-auxiliary winding core portion (sub-auxiliary bobbin body 170), the sub-auxiliary bobbin 160 rotates relative to the main bobbin 40, using a portion of the separate connecting portion as a rotation fulcrum. This configuration allows the insertion hole 51 of the main winding core portion to be opened, and the leg portion 21 of a second core different from the first core to be inserted into the insertion hole 51. The sub-auxiliary bobbin connecting portion 163 does not necessarily have to be supported by the main bobbin connecting portion 153. For example, the sub-auxiliary bobbin 160 may rotate around a middle portion 183 of the first wire 180 as a rotation fulcrum.

[0104] The separate connection portion between the main bobbin 40 and the sub-auxiliary bobbin 160 has the same configuration as the connection portion between the main bobbin and the auxiliary bobbin described above, and provides the same functions and effects.

[0105] For example, after inserting the leg portion of the second core 20 into the insertion hole 51, the sub-auxiliary bobbin 160 can be rotated relative to the main bobbin 40 in a closing direction, which is opposite to the opening direction, so that the base portion of the second core 20 can be sandwiched between the second main bobbin flange 52 of the main bobbin 40 and the second sub-auxiliary bobbin flange 172, which is the second end of the sub-auxiliary bobbin 170. Before, after, or simultaneously with this, as described above, the first core 10 can be attached between the first main bobbin flange 42 and the first auxiliary bobbin flange 62. Thereafter, the third core 20 can be attached to the second end opposite the first auxiliary bobbin flange 62, which is the first end of the auxiliary bobbin 60, and before or after that, the fourth core 140 can be attached to the second sub-auxiliary bobbin flange 172, which is the outer end of the sub-auxiliary bobbin 160. The plurality of cores, including the first core 10, the second core 20, the third core 30, and the fourth core 140, can be arranged so as to form a magnetic circuit along the axis.

[0106] The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.

[0107] 6, in the above-described embodiment, the communication groove 45 is formed in one location approximately in the center along the Y axis above the first main bobbin collar 42 along the Z axis. For example, this configuration may be modified so that the communication groove is formed in multiple locations along the Y axis above the first main bobbin collar 42 along the Z axis.

[0108] By forming multiple communication grooves in the first auxiliary bobbin collar 62 corresponding to the positions of the communication grooves formed in the first main bobbin collar 42, it becomes possible to pass the intermediate portion of the wire through each communication groove. In this way, even if the intermediate portion of the wire is passed through multiple communication grooves, all of the intermediate portions are located above along the Z axis. Therefore, with the wire wound on the main bobbin 40 and the auxiliary bobbin 60, the auxiliary bobbin 60 can be rotated to open the main bobbin insertion hole 51.

[0109] 6, the communication groove 45 is formed on the upper side of the first main bobbin collar 42 along the Z axis. For example, this configuration may be modified so that the communication groove is formed on one side of the first main bobbin collar 42 along the Y axis.

[0110] By forming a communication groove in the first auxiliary bobbin collar 62 in accordance with the position of the communication groove formed in the first main bobbin collar 42, it becomes possible to pass the intermediate portion of the wire through each communication groove. In this way, even if the intermediate portion of the wire is passed through the side along the Y axis, since both intermediate portions are on one side along the Y axis, the wire wound on the main bobbin 40 and the auxiliary bobbin 60 can be wound. In this state, the auxiliary bobbin 60 can be rotated to open the main bobbin insertion hole 51. [Explanation of symbols]

[0111] 1, 2... Coil device 10...1st core 11...First insertion leg 12...First outer leg 13...First base part 20,120...Second core 21...Second insertion leg 22…Second outer leg 23...Second base section 30,130...Third Core 31...Third insertion leg 32...Third outer leg 33...Third base 40...Main bobbin 42...First main bobbin flange 43...Main bobbin connection part (connection part) 43a...Tapered surface 44...First main bobbin convex portion 44a...Tapered surface 45...Main bobbin connecting groove (connecting groove) 46a, 46b, 46c...Main bobbin side fitting portion (fitting portion) 47a, 47b... Fulcrum receiving part 50...Main bobbin body (main winding core) 51...Main bobbin insertion hole 52,152...Second main bobbin flange 53...Lead drawer stand 153...Main bobbin connection part (separate connection part) 53a...Tapered surface 54, 154...Second main bobbin convex portion 54a...Tapered surface 55a, 55b, 55c, 55d... Lead groove 155...Main bobbin connecting groove (connecting groove) 156c...Main bobbin side fitting portion (fitting portion) 60...Auxiliary bobbin 62...First auxiliary bobbin collar 63...Auxiliary bobbin connection part 65...Auxiliary bobbin side connecting groove 66a, 66b, 66c...Auxiliary bobbin side fitting portion 67a, 67b...Pivot fulcrum pin 70...Auxiliary bobbin body (auxiliary winding core) 71...Auxiliary bobbin insertion hole 72...Second auxiliary bobbin collar 73, 74...Auxiliary bobbin convex portion 73a, 74a...Tapered surfaces 80,180...First wire 182...Main bobbin winding section 183…middle part 184...Sub auxiliary bobbin winding section 85, 86, 185, 186...First lead section 87, 88, 187, 188...Connection terminals 90...Second wire 92...Main bobbin winding section 93…Middle part 94...Auxiliary bobbin winding section 95,96...Second lead section 97,98...Connection terminals 140...4th core 141...Fourth insertion leg 142...Fourth outer leg 143...4th base 160...Sub auxiliary bobbin 162...First sub auxiliary bobbin flange 163...Sub auxiliary bobbin connection part (separate connection part) 165...Sub auxiliary bobbin side connecting groove 166c...Sub auxiliary bobbin side fitting part 170...Sub auxiliary bobbin body 171...Sub auxiliary bobbin insertion hole 172...Second sub auxiliary bobbin collar 173...Lead drawer stand 174...Sub auxiliary bobbin convex portion 175a, 175b, 175c, 175d...Lead groove

Claims

1. A bobbin of a coil device having a main bobbin and an auxiliary bobbin, the main bobbin is provided with a main winding core portion, a first main bobbin flange disposed at one end of the main winding core portion, and a second main bobbin flange disposed at the other end of the main winding core portion, the auxiliary bobbin is provided with an auxiliary winding core portion, a first auxiliary bobbin flange disposed at one end of the auxiliary winding core portion, and a second auxiliary bobbin flange disposed at the other end of the auxiliary winding core portion, a main bobbin connecting portion is formed at a circumferential portion of the first main bobbin flange, an auxiliary bobbin connecting portion is formed at a position of the first auxiliary bobbin flange corresponding to the main bobbin connecting portion in the circumferential direction, A bobbin of a coil device, wherein the main bobbin connecting portion and the auxiliary bobbin connecting portion are connected together so that the auxiliary bobbin is rotatable relative to the main bobbin.

2. a fulcrum receiving portion is provided at the main bobbin connecting portion of the first main bobbin flange, and a hole of the fulcrum receiving portion extends perpendicular to an extending direction of the main winding core portion, 2. The bobbin of the coil device according to claim 1, wherein a rotation fulcrum pin is provided at the auxiliary bobbin connecting portion of the first auxiliary bobbin collar and inserted into the fulcrum receiving portion.

3. the fulcrum receiving portion includes a first fulcrum receiving portion and a second fulcrum receiving portion that face each other, the first fulcrum receiving portion and the second fulcrum receiving portion being disposed symmetrically with respect to an extension direction of the main winding core portion, The rotation fulcrum pin includes a first rotation fulcrum pin and a second rotation fulcrum pin, the first rotation fulcrum pin is inserted into the first fulcrum receiving portion, The bobbin of the coil device according to claim 2 , wherein the second rotation fulcrum pin is inserted into the second fulcrum receiving portion.

4. the first main bobbin flange is provided with a first communicating groove extending in the extension direction of the main winding core portion, the first communicating groove is located between the first fulcrum receiving portion and the second fulcrum receiving portion, the first auxiliary bobbin flange is provided with a second communicating groove extending in the extension direction of the auxiliary winding core portion, the second communication groove is located between the first rotation fulcrum pin and the second rotation fulcrum pin, The bobbin of the coil device according to claim 3 , wherein the first communicating groove and the second communicating groove are arranged at corresponding positions.

5. 2. The bobbin of the coil device according to claim 1, wherein the first auxiliary bobbin collar of the auxiliary bobbin is rotatable by 180 degrees or less with respect to the first main bobbin collar of the main bobbin.

6. the first main bobbin flange is provided with a first communicating groove extending in the extension direction of the main winding core portion, the first auxiliary bobbin flange is provided with a second communicating groove extending in the extension direction of the auxiliary winding core portion, The bobbin of the coil device according to claim 1 , wherein the first communicating groove and the second communicating groove are arranged at corresponding positions.

7. a first main bobbin convex portion protruding in an extending direction of the main winding core portion is provided on both sides of the first main bobbin flange, a second main bobbin convex portion protruding in an extending direction of the main winding core portion is provided on both sides of the second main bobbin flange, the first main bobbin convex portion and the second main bobbin convex portion protrude in opposite directions to each other; a first auxiliary bobbin convex portion protruding in an extending direction of the auxiliary winding core portion is provided on both sides of the first auxiliary bobbin flange, a second auxiliary bobbin protruding portion protruding in an extending direction of the auxiliary winding core portion is provided on both sides of the second auxiliary bobbin flange, the main bobbin connecting portion and the auxiliary bobbin connecting portion 7. The bobbin of a coil device according to claim 1, wherein the first auxiliary bobbin convex portion and the second auxiliary bobbin convex portion protrude in opposite directions.

8. The main winding core and the auxiliary winding core have the same inner diameter and outer diameter, the first main bobbin collar, the second main bobbin collar, the first auxiliary bobbin collar, and the second auxiliary bobbin collar are all annular plates, the inner diameter of the annular plate is equal to the outer diameter of the main winding core portion, the main winding core portion, the first main bobbin flange, and the second main bobbin flange have a common axis; 7. The bobbin of a coil device according to claim 1, wherein the auxiliary winding core portion, the first auxiliary bobbin flange, and the second auxiliary bobbin flange have a common axis.

9. a main bobbin having a main winding core and an insertion hole formed along the axis of the main winding core; an auxiliary bobbin disposed at one first end along the axis of the main bobbin, The main bobbin and the auxiliary bobbin are bobbins of a coil device that are connected to each other so that the insertion hole can be opened, with a connecting portion disposed at a portion of the circumferential direction of the shaft core as a pivot point.

10. A transformer comprising the bobbin according to any one of claims 1 to 9.

11. The coil further includes a first wire, a second wire, a first core, a second core, and a third core; the first wire is wound around the main winding core, the second wire is wound around the auxiliary winding core, the first core is inserted into the main winding core portion, and its position is restricted by a first main bobbin convex portion formed on the first main bobbin flange and protruding in the extension direction of the main winding core portion, the second core is inserted into the main winding core portion, and its position is restricted by a second main bobbin convex portion formed on the second main bobbin flange and protruding in the extension direction of the main winding core portion, The transformer according to claim 10, wherein the third core is inserted into the auxiliary winding core portion, and its position is restricted by a second auxiliary bobbin convex portion formed on the second auxiliary bobbin flange and protruding in the extension direction of the auxiliary winding core portion.

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