JP2014183081A - Winding component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding component with which the whole body is prevented from being enlarged, whose cost is prevented from being increased, and whose simple structure prevents a coil from moving out so that a required distance for insulation is ensured between the coil and a core.SOLUTION: A winding component comprises: an opening end of a cover 11 for housing a coil 10 therein including a convex part 14 projecting in a cap 12 side; and a notch 17 on a plane part 15 of the cap 12 through which the convex part 14 can pass. The convex part 14 passes through the notch 17 so that the cap 12 is dropped in the coil side in a plane face direction and is provided on the cover 11 non-detachably by the plane part 15. Moreover, a stopper mechanism 16 is provided so that a core 13 contacts to the cap 12 to prevent the cap 12 from moving in the above mentioned movement direction.

Description

  The present invention relates to a winding component including a coil that generates a magnetic field, such as a choke coil and a transformer, and a core that forms a magnetic path.

  Among the winding parts incorporated in various electronic / electrical devices, particularly those used for power supply devices with a power of 1 kW or more, a large current of 10 A to 150 A flows. Between them, an insulator made of a synthetic resin for ensuring insulation is interposed.

FIG. 7 shows a transformer which is a kind of a conventional winding component using this type of insulator.
In this transformer, a coil 2 wound around a bobbin 1 and a coil 3 made of a rectangular copper wire arranged at both ends in the axial direction are housed in a bottomed cylindrical insulating cover 4, and An insulating cap 5 is placed in the opening of the cover 4, and a pair of E-type cores 6 surrounding the cover 4 and the cap 5 to form a closed magnetic circuit are disposed. The insulator is constituted by 4 and the cap 5.

  By the way, in the conventional transformer having the above-described configuration, as shown in FIG. 8A, the dimensional tolerances of the respective components such as the bobbin 1, the cover 4, and the cap 5 are accumulated, so that A gap L is generated between them. For this reason, when the power supply device incorporating the transformer is subjected to vibration, the cap 5 and the coil 3 jump upward in the figure and the coil 3 jumps out of the cover 4 as shown in FIG. There is a risk of contact with the core 6.

  Therefore, as shown in FIG. 3C, the gap L formed in advance between the cap 5 and the core 6 so that the coil 3 does not come out of the cover 4 even when the cap 5 jumps up. In consideration of the above, it is conceivable that the cylindrical flange portions 5a and 5b are erected on the inner and outer circumferences of the cap 5 and the cover 4 is increased in depth, but such a configuration is adopted. As a result, the length of the cover 4 and the core 6 in the axial direction is increased, resulting in a problem that the product becomes taller and costs increase.

In the above transformer, when a gap L is generated between the cap 5 and the core 6 (FIG. 9A), a required insulation distance L ₀ is ensured between the coil 3 and the core 6. It is necessary to do this ((b) in the figure).
However, as shown in FIG. (C), when subjected to vibration in the same manner, when only the coil 2, 3 and the cap 5 is displaced upward by the gap L, the insulation distance L that insulation distance L ₁ is the required It will be insufficient for ₀ .

Therefore, as shown in FIG. 9D, the inner and outer peripheries of the cap 5 are taken into account in consideration of the gap L above the cap 5 so that the required insulation distance L ₀ can be secured even when the cap 5 moves upward. When the height of the cylindrical flange 5a formed on the cover 4 is increased and the depth of the cover 4 is increased, the length of the cover 4 and the core 6 in the axial direction is also increased, and the height of the product is increased. There was a problem of increasing the cost.

Therefore, as shown in FIG. 9 (e), the inner periphery of the cap 5, a cylindrical wall portion 6a which is inserted respectively into the cover 4, to form 6b, the required insulation distance L ₀ can be secured As a result, the outer diameter of the cover 4 and the core 6 surrounding the cover 4 is increased. As a result, the width of the product is increased, and the cost is similarly increased.

  Patent Document 1 below also discloses a power transformer using an insulator similar to that shown in FIG.

JP-A-7-235426

  The present invention has been made in view of the above circumstances, and it is possible to secure a required insulation distance from the core by suppressing the movement of the coil with a simple structure without increasing the overall size and cost. It is an object to provide a winding component.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that one or more coils are housed and an insulating cover in which a wall portion covering the outer periphery of the coil in the axial direction is formed, and the wall portion. An insulating cap disposed in an opening formed at the end in the axial direction, and a core that forms a closed magnetic circuit so as to surround the wall of the cover and the periphery of the cap. In the winding component provided, a convex portion projecting toward the other side is formed on one of the end portion of the cover and the outer peripheral edge of the cap, and the convex portion passes through the other flat plate portion. Forming a possible notch, and providing the cap so as not to be detached from the cover by inserting the convex portion through the notch and moving in the plate surface direction of the flat plate portion; and Core above The convex portion in contact are those characterized in that a stopper mechanism for preventing that said cap is moved to a position that enables insertion of the cutout portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the core is disposed at a back portion facing the cap and at both ends of the back portion and extends along the wall portion. The stopper mechanism is a protrusion protruding from the outer surface of the cap mounted on the cover to the side surface of the back portion of the core.

  According to a third aspect of the present invention, in the first aspect of the present invention, the core is disposed at a back portion facing the cap and at both ends of the back portion and extends along the wall portion. An outer leg, and a middle leg disposed between the outer legs and inserted into the coil, and the stopper mechanism is formed in the cap so that the middle leg is inserted therethrough. Between the legs, the convex portion is an insertion hole formed with a clearance smaller than the amount of movement of the cap to a position where the notch portion can be inserted.

  According to the invention described in any one of claims 1 to 3, the convex portion formed on one of the end portion of the cover and the outer peripheral edge of the cap is inserted into the notch portion formed on the other flat plate portion. When the cap is moved in the direction of the plate surface of the flat plate portion, the displacement of the flat plate portion is restricted by the convex portion, so that the cap cannot be detached from the cover. After the core is assembled, the stopper mechanism restricts the movement of the cap in the plate surface direction.

  As a result, since the cap does not come off the cover, the cap is detached from the cover and stored in the cover when subjected to vibration with a simple structure without causing an increase in overall size or cost. It is possible to prevent the coil from coming into contact with the core or the insulation distance from the core being insufficient.

It is a disassembled perspective view which shows 1st Embodiment of the winding components of this invention. It is a perspective view which shows the procedure which attaches the cap of FIG. 1 to a cover. It is a perspective view which shows the final shape after the assembly of FIG. It is a disassembled perspective view which shows the 2nd Embodiment of this invention. It is a disassembled perspective view which shows the 3rd Embodiment of this invention. FIG. 6 is a perspective view showing a procedure for attaching the cap of FIG. 5 to a cover. It is a disassembled perspective view which shows the structure of the conventional transformer. FIG. 8 is a schematic diagram for explaining a first problem of the transformer of FIG. 7. FIG. 8 is a schematic diagram for explaining a second problem of the transformer of FIG. 7.

(First embodiment)
1 to 3 show a first embodiment in which a winding component according to the present invention is applied to a choke coil. This choke coil includes one coil 10 and an insulation in which the coil 10 is housed. A cover 11, an insulating cap 12 disposed in an opening formed at the upper end of the cover 11, and a pair forming a closed magnetic circuit so as to surround the cover 11 and the cap 12. The E-type core 13 of FIG.

  Here, the cover 11 includes a bottom plate 11a having a circular hole formed in the center, a wall portion 11b that stands upright at both longitudinal ends of the bottom plate 11a and covers the outer periphery of the coil 10 in the axial direction, The cylindrical portion 11c provided upright in the hole portion is integrally formed. Moreover, in this cover 11, the convex part 14 which protrudes toward the wall part 11b side which each opposes is integrally formed in the upper end both sides of the wall part 11b. In the cover 11, the coil 10 formed by edgewise winding a rectangular copper wire is housed by being covered with a cylindrical portion 11c.

  On the other hand, the cap 12 is composed of a rectangular plate-like flat plate portion 15 having an insertion hole 15a formed at the center thereof, and projections 16 provided upright at four locations of the flat plate portion 15. One side of the cover 11 is formed with a dimension between the wall parts 11b of the cover 11, and the other side along the wall part 11b is formed with a dimension slightly longer than the length of the wall part 11b. And the notch part 17 which can insert each convex part 14 by the side of the cover 11 is formed in the outer periphery of the said other side of the flat plate part 15 in alignment with the wall part 11b.

  Then, as shown in FIG. 2, the cap 12 is inserted into the notch 17 formed in the flat plate portion 15 through the convex portion 14 of the cover 11 and dropped to the coil 10 side, and then along the wall portion 11b. It is moved in the direction along the plate surface of the flat plate portion 15. Thereby, the cap 12 is attached to the cover 11 in a state in which the movement in the separation direction is restricted by the flat plate portion 15 coming into contact with the convex portion 14 of the cover 11. The insertion hole 15a of the cap 12 is formed in an oval shape having a longitudinal direction in the movement direction so that the movement is possible with the cylindrical portion 11c of the cover 11 inserted therein.

  The pair of E-shaped cores 13 are arranged so as to surround the periphery of the wall 11b of the cover 11 and the cap 12. The E-shaped core 13 includes a rectangular plate-like back portion 13a that faces the cap, outer legs 13b that are integrally formed at both longitudinal ends of the back portion 13a and disposed along the wall portion 11b, and these outer legs. It is composed of a columnar middle leg 13c that is integrally formed at the center between 13b and inserted into the coil 10.

  These E-shaped cores 13 are arranged such that the middle leg 13 c is inserted into the coil 10 from the insertion hole 15 a of the cap 12, and the outer leg 13 b is arranged along the outer surface of the wall portion 11 b of the cover 11.

  On the other hand, the four protrusions 16 erected on the flat plate portion 15 of the cap 12 are arranged so as to be positioned in the vicinity of the side surface of the back portion 13a of the E-type core 13 in a state where the E-type core 13 is arranged. As a result, the cap 12 is mounted in a state in which movement in the direction along the wall portion 11 b of the cover 11 is prevented by the E-type core 13. The protrusion 16 constitutes a stopper mechanism for the cap 12.

(Second Embodiment)
FIG. 4 shows a second embodiment in which the winding component according to the present invention is applied to a transformer. This transformer has a primary coil 20 made of a round wire and a secondary coil 21 made of a flat copper wire having a bobbin. A cylindrical coil assembly 22 wound around, an insulating cover 23 in which the coil assembly is accommodated, an insulating cap 24 disposed in an opening formed at the upper end of the cover 23, A pair of E-type cores 13 are arranged so as to surround the cover 23 and the cap 24 and form a closed magnetic path.

  In this transformer, a cover 23 includes a bottom plate 23a having a circular hole formed in the center thereof, and a cylindrical outer wall portion 23b that stands on the outer periphery of the bottom plate 23a and covers the outer periphery of the coil assembly 22 in the axial direction. Are integrally formed. Further, at the upper end portion of the outer wall portion 23b of the cover 23, inverted L-shaped convex portions 25 are integrally formed at four locations that are equally spaced in the circumferential direction. Here, the convex portion 25 is formed so as to be positioned at the corner of the virtual rectangle so as to face the outer periphery of the cap 24, and the upper side of the inverted L shape protrudes in the short side direction of the virtual rectangle. Are arranged. The coil assembly 22 is housed in the cover 23 with the ends 20a and 21a of the coils 20 and 21 extending outward.

  The cap 24 is formed with an insertion hole 26 a at the center and a plate-like flat plate portion 26 that covers the bobbin end surface of the coil assembly 22, and is formed at one end portion in the longitudinal direction of the flat plate portion 26. This is roughly constituted by a partition wall portion 27 for securing an insulation distance between the portion 20a and the E-type core 13. A cutout portion 28 into which each convex portion 25 on the cover 23 side can be inserted is formed on the outer peripheral edge of the flat plate portion 25 in the longitudinal direction.

  2, the cap 24 is inserted into the notch 28 formed in the flat plate portion 26 through the projection 25 of the cover 23 and dropped into the coil assembly 22 side, and then the flat plate portion 26 is formed. By moving in the longitudinal direction, the flat plate portion 26 abuts on the convex portion 25 of the cover 23 when the movement in the detaching direction is attempted, and the movement is restricted.

  A pair of the E-type cores 13 are arranged so as to surround the outer periphery of the cover 23 and the periphery of the cap 24. Similarly, the E-shaped core 13 has the middle leg 13 c inserted into the coil assembly 22 from the insertion hole 26 a of the cap 24, and the outer leg 13 b is disposed along the outer peripheral surface of the cover 23. Here, the inner diameter dimension of the insertion hole 26a of the cap 24 is formed slightly larger than the outer diameter dimension of the middle leg 13c of the E-type core 13, and the stopper that restricts the movement of the cap 24 by the insertion hole 26a. The mechanism is configured.

(Third embodiment)
5 and 6 show a third embodiment in which the winding component according to the present invention is applied to a transformer.
As shown in FIG. 5, in this transformer, secondary coils 31 made of rectangular copper wires are arranged at both ends in the axial direction of a bobbin around which a primary coil 30 made of a round wire is wound. The next coil 31 is accommodated in the cylindrical cover 33 for insulation, and the caps for insulation 34 are arranged in the openings at both ends in the axial direction of the cover 33 so as to surround the cover 33 and the cap 34. A pair of E-type cores 13 are arranged on the top.

  In this transformer, four convex portions 35 similar to those shown in FIG. 4 are arranged at equal intervals in the circumferential direction in openings formed at both ends of a cylindrical cover (wall portion) 33. In addition, each is formed in an inverted L shape. The caps (flat plate portions) 34 are each formed in a flat plate shape having an insertion hole 34a formed at the center and covering the secondary coil 31. A cutout portion 36 into which the convex portion 35 can be inserted is formed.

  Then, as shown in FIG. 6, these two caps 34 are inserted into the cover 33 by inserting the convex portion 35 of the cover 33 into the cutout portion 36 from the opening end side of each cover 33. By moving in the direction of the plate surface, the cover 33 is attached to the cover 33 in a state where movement in the direction away from the cover 33 is restricted.

  Similarly, the pair of E-type cores 13 are arranged so as to surround the outer periphery of the cover 33 and the periphery of both caps 34. Similarly, the E-shaped core 13 has the middle foot 13 c inserted into the coils 30 and 31 through the insertion hole 34 a of the cap 34, and the outer foot 13 b is disposed along the outer peripheral surface of the cover 33 along the axial direction. . Also in this transformer, the inner diameter dimension of the insertion hole 34a of the cap 34 is formed to be slightly larger than the outer diameter dimension of the middle leg 13c of the E-type core 13, so that the cap 34 can be moved by the insertion hole 34a. A stopper mechanism for regulating is configured.

  In the choke coil having the above configuration shown in the first embodiment and the transformer shown in the second and third embodiments, the convex portions formed at the end portions of the insulating covers 11, 23, 33. 14, 25, and 35 are inserted into the notches 17, 28, and 36 formed in the caps 12, 24, and 34, and the caps 12, 24, and 34 are moved in the plate surface direction to cover the covers 11, 23, and 33. The cap 12, 24, 34 can be restricted from moving in the plate surface direction by the protrusion 16 or the insertion holes 26 a, 34 a after the E-type core is incorporated.

  As a result, since the caps 12, 24, and 34 are not detached from the covers 11, 23, and 33, even when subjected to vibration with a simple structure without causing an increase in overall size or cost. The caps 12, 24, 34 are removed from the covers 11, 23, 33 and the coils 10, 31 stored in the covers 11, 23, 33 are in contact with the E-type core 13, or the insulation distance from the core 13 is insufficient. Can be prevented in advance.

  In the first to third embodiments, the convex portions 14, 25, 35 are provided on the cover 11, 23, 33 side, and the convex portions 14, 25, 35 are provided on the cap 12, 24, 34 side. However, the present invention is not limited to this, and the flat plate portion is formed in the horizontal direction in the opening of the cover. A notch part may be formed in the part, and a convex part that can be inserted into the notch part may be formed on the outer peripheral edge of the cap.

10, 20, 21, 30, 31 Coil 11, 23, 33 Cover 11b, 23b Wall portion 12, 24, 34 Cap 13 E-type core 13b Outer foot 13c Middle foot 14, 25, 35 Protruding portion 15, 26 Flat plate portion 16 Protrusion (stopper mechanism)
26a, 34a Insertion hole (stopper mechanism)
17, 28, 36 Notch

Claims (3)

One or more coils are accommodated, and the insulating cover is formed with a wall portion that covers the outer periphery of the coil in the axial direction, and the opening is formed at the end of the wall portion in the axial direction. In a winding component including a cap for insulation, and a core that is disposed so as to surround the wall of the cover and the periphery of the cap and forms a closed magnetic circuit,
A convex portion protruding toward the other side is formed on one of the end portion of the cover and the outer peripheral edge of the cap, and a notch portion through which the convex portion can pass is formed on the other flat plate portion. The cap is provided so as not to be detached from the cover by moving the convex portion through the notch and moving in the plate surface direction of the flat plate portion,
A winding part comprising: a stopper mechanism that prevents the cap from moving to a position where the cap comes into contact with the core so that the convex portion can be inserted through the notch. The core has a back portion that faces the cap, and outer legs that are disposed at both ends of the back portion and extend along the wall portion,
The winding component according to claim 1, wherein the stopper mechanism is a protrusion that protrudes from an outer surface of the cap attached to the cover to a side surface side of the back portion of the core. The core includes a back portion facing the cap, outer legs disposed at both ends of the back section and extending along the wall portion, and disposed between the outer legs and inserted into the coil. And having a middle leg
The stopper mechanism is formed in the cap so that the middle leg is inserted, and the amount of movement of the cap to a position where the convex portion can be inserted through the notch between the middle leg and the stopper mechanism. The winding component according to claim 1, wherein the winding component is an insertion hole formed with less clearance.

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