JP5088638B2 - Coil component, transformer, and method of manufacturing coil component - Google Patents

Description

  The present invention relates to a coil component, a transformer, and a method for manufacturing the coil component.

  A transformer as a coil component having a bobbin, a core, and a primary winding and a secondary winding is conventionally known. The primary winding and the secondary winding are constituted by copper wires coated with insulation. The bobbin has a substantially cylindrical portion made of an insulating material, and a primary winding is wound around the outer peripheral surface of the substantially cylindrical portion. Further, a double-sided adhesive tape is provided so as to cover the primary winding wound around the substantially cylindrical part over the entire circumference of the substantially cylindrical part, and the secondary winding is on the double-sided adhesive tape of the substantially cylindrical part. Are wound coaxially with the primary winding. Such a transformer is described, for example, in JP-A-7-240324 (Patent Document 1).

Japanese Patent Laid-Open No. 7-240324

  However, in the conventional coil component described above, the adhesive force of the double-sided adhesive tape is not sufficient, and when the primary winding and the secondary winding are wound around the substantially cylindrical portion, these are not shown on the double-sided adhesive tape. The winding cannot be fixed and it is difficult to stabilize the position of the winding.

  Therefore, an object of the present invention is to provide a coil component, a transformer, and a method of manufacturing the coil component in which the winding is fixed on the double-sided adhesive tape and the position of the winding is stable.

In order to achieve the above object, the present invention provides a bobbin having a substantially cylindrical portion made of an insulating material and having an outer peripheral surface and an inner peripheral surface, and one conductor and another conductor wound around the outer peripheral surface. At least two conducting wires, a core inserted in a space defined by the inner peripheral surface, and a double-sided adhesive tape disposed so as to be immovable facing the outer peripheral surface, the one conducting wire comprising: A winding part wound around the outer peripheral surface of the substantially cylindrical part; and a bent-out part connected to the winding part and bent out from the winding part on the double-sided adhesive tape. A portion of the bent lead-out portion that is connected to the winding portion sinks in the thickness direction of the double-sided pressure-sensitive adhesive tape on the double-sided pressure-sensitive adhesive tape , and A part of the bent-out portion that is connected to the winding portion is one side of the double-sided adhesive tape. The winding portion is wound around the outer peripheral surface of the substantially cylindrical portion so that the winding portion of the one conducting wire is disposed on the surface of the double-sided adhesive tape. Coil parts that are being provided.

  A double-sided pressure-sensitive adhesive tape is disposed on the outer peripheral surface of the substantially cylindrical portion so as to be immovable, and one conductor is wound around the outer peripheral surface of the substantially cylindrical portion, and both sides are connected to the winding portion. A part that is bent and pulled out from the winding part on the adhesive tape and is connected to the winding part on both sides of the double-sided adhesive tape. Since the adhesive tape sinks in the thickness direction, the part that is part of the folded drawer and connected to the winding part comes into contact with the adhesive of the double-sided adhesive tape over a larger area and is bent. A drawer | drawing-out part can be firmly fixed to a double-sided adhesive tape.

  For this reason, in the coil component manufacturing process, when the winding part is wound around the substantially cylindrical part after the folding part is submerged in the double-sided adhesive tape, the position of the folding part can be stabilized. Therefore, the winding part can be stably wound around the substantially cylindrical part. Also, in the coil component manufacturing process, when the winding part is wound into a substantially cylindrical part and the bent lead-out part is submerged in the double-sided adhesive tape, the bent lead-out part is connected to the terminal electrode. The position of the drawer portion can be stabilized, so that the winding portion wound around the substantially cylindrical portion can be prevented from being unwound.

  Here, it is preferable that the double-sided pressure-sensitive adhesive tape is directly attached to the outer peripheral surface. Since the double-sided pressure-sensitive adhesive tape is directly affixed to the outer peripheral surface, the bent lead-out portion can be firmly fixed to the double-sided pressure-sensitive adhesive tape with respect to the conductive wire wound directly on the outer peripheral surface of the substantially cylindrical portion.

  In addition, an insulating tape is provided so as to cover the other conductor wound around the substantially cylindrical portion over the entire circumference of the substantially cylindrical portion, and the double-sided adhesive tape is directly affixed on the insulating tape. The one conductive wire is preferably wound on the insulating tape.

  Insulating tape is provided so that other conductors wound around the substantially cylindrical part are covered over the entire circumference of the substantially cylindrical part, and the double-sided adhesive tape is directly affixed on the insulating tape. About the conducting wire wound directly on, the bent drawer portion can be firmly fixed to the double-sided adhesive tape.

  Moreover, it is preferable that this double-sided adhesive tape is directly affixed on the said other conducting wire wound by this substantially cylindrical shape part. Since the double-sided adhesive tape is directly affixed on the other conductor wound around the substantially cylindrical part, the lead drawn around the other conductor wound around the substantially cylindrical part is bent out. The part can be firmly fixed to the double-sided adhesive tape.

  Moreover, it is preferable that the connection point part connected to this winding part sinks most in the part connected to this winding part which is a part of this bending drawer part.

  The part connected to the winding part that is a part of the bent-out part is the part where the connection point connected to the winding part sinks the most, so the connection point part closest to the winding part It can be firmly fixed to the double-sided adhesive tape. For this reason, a winding part can be hold | maintained more stably, the position of a winding part can be stabilized more, and it can prevent that position shift arises.

  According to the present invention, there is provided a transformer comprising the coil component according to any one of claims 1 to 5, wherein the at least two conductors have a primary winding and a secondary winding. .

  The at least two conducting wires have a primary winding and a secondary winding, and are used to form a transformer comprising the coil component according to any one of claims 1 to 4. It can be set as the transformer by which the part was firmly fixed to the double-sided adhesive tape. For this reason, when one conducting wire is a secondary winding and the other conducting wire is a primary winding, it is easy to secure an insulation distance between the primary winding and the secondary winding at a desired value. It can be.

Further, according to the present invention, a core is inserted into a space defined by the inner peripheral surface of the substantially cylindrical portion, and at least two conductors are provided on the outer peripheral surface of the substantially cylindrical portion. A step of disposing a double-sided pressure-sensitive adhesive tape on the outer peripheral surface of the substantially cylindrical portion of the wound bobbin so as not to move relative to the substantially cylindrical portion; A portion of the conducting wire that is wound around the outer peripheral surface of the substantially cylindrical portion is a winding portion, and is a portion of the one conducting wire that is connected to the winding portion and folded from the winding portion. A step of forming a bent and drawn portion as a bent-out portion, and a portion of the bent-out portion that is connected to the winding portion in the thickness direction of the double-sided pressure-sensitive adhesive tape. It includes a step of sinking into the double-sided adhesive tape by pressing the tape, and before the step of the該折bent lead portion, Of the bent lead-out portion of the one lead wire after the step of sinking into the double-sided adhesive tape, or before the step of making the bent-out lead portion and after the step of sinking into the double-sided adhesive tape. The winding portion of the one lead wire is formed on one side of the double-sided pressure-sensitive adhesive tape on a part of the double-sided pressure-sensitive adhesive tape, and a portion that is connected to the winding portion. Is provided so that the winding part is wound around the outer peripheral surface of the substantially cylindrical part .

  A substantially cylindrical bobbin in which a core is inserted into a space defined by the inner peripheral surface of the substantially cylindrical portion and at least two conductors are wound on the outer peripheral surface of the substantially cylindrical portion. A step of disposing a double-sided adhesive tape on the outer peripheral surface of the shape portion so as to be immovable with respect to the substantially cylindrical shape portion, and bending the one lead wire, A part wound around the outer peripheral surface is a winding part, a part of one conductive wire that is connected to the winding part and bent and pulled out from the winding part is a bent drawer part; and A step of sinking the double-sided pressure-sensitive adhesive tape by pressing a portion of the folded drawer portion connected to the winding portion against the double-sided pressure-sensitive adhesive tape in the thickness direction of the double-sided pressure-sensitive adhesive tape. Therefore, the bent drawer portion can be firmly fixed to the double-sided adhesive tape.

  For this reason, when winding the winding part around the substantially cylindrical part after the folding drawer part is submerged in the double-sided adhesive tape, the position of the folding drawer part can be stabilized. Can be stably wound around the substantially cylindrical portion. In addition, when the winding part is wound around a substantially cylindrical part and the folded lead part is submerged in the double-sided adhesive tape, and the bent lead part is connected to the terminal electrode, the position of the folded lead part is stabilized. Therefore, it is possible to prevent the winding part wound around the substantially cylindrical part from being unwound.

  As described above, the present invention can provide a coil component, a transformer, and a method for manufacturing the coil component in which the winding is fixed on the double-sided adhesive tape and the position of the winding is stable.

1 is a schematic exploded front view showing a transformer as a coil component according to an embodiment of the present invention. In the manufacturing method of the coil components by embodiment of this invention, before winding a winding part to a substantially cylindrical part, a mode that the bending drawer part is pressed with respect to a double-sided adhesive tape with a pressing jig is shown. Sectional drawing. In the manufacturing method of the coil component by embodiment of this invention, after winding a winding part in a substantially cylindrical shape part, the cross section which shows a mode that the bending drawer part is pressed with respect to a double-sided adhesive tape with a pressing jig. Figure. The general | schematic exploded front view which shows the transformer which is the conventional coil components.

  A transformer as a coil component according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, a transformer 1 that is a coil component includes a core 10, a bobbin 20, and a conductive wire 50. For convenience of explanation, FIG. 1 shows only one primary winding 51 and one secondary winding 52 for the conductor 50, as in FIG. The illustration is omitted for. Further, only a part of a winding portion 52A of a secondary winding 52 described later is illustrated. In the following description, the upper part of the transformer 1 shown in FIG. 1 is defined as upper, the lower part is defined as lower, the left is defined as left, and the right is defined as right.

  A pair of cores 10 having the same shape is provided. The core 10 has a bottom wall portion 10A, a pair of side wall portions 10B extending from the right end and the left end of the bottom wall portion 10A toward the other core 10, and a direction extending toward the other core 10. And a central wall portion 10C extending from the central portion of the bottom wall portion 10A, and has a substantially E shape as a whole. The extended ends of the pair of side wall portions 10B and the central wall portion 10C of one core 10 are in contact with the side wall portions 10B of the other core 10 and the extended end of the central wall portion 10C, respectively.

  The bobbin 20 is formed of an insulating resin and has a substantially cylindrical shape. The bobbin 20 has a substantially cylindrical portion 21 provided with a terminal block 40 at a lower end that is one end in the axial direction. When the transformer 1 is mounted on a mounting board (not shown), the substantially cylindrical portion 21 has its axial direction oriented perpendicularly to the surface of the mounting board (not shown), and the inner peripheral surface of the substantially cylindrical portion 21. The central wall portion 10C of the core 10 is inserted into the space defined by.

  The terminal block 40 includes a terminal support portion 41 made of the same insulating resin as the substantially cylindrical portion 21. Each of the terminal support portions 41 extends in the left-right direction, which is a direction perpendicular to the axial direction of the substantially cylindrical portion 21, and a central portion thereof is integrally connected to the lower end of the substantially cylindrical portion 21. The substantially cylindrical portion 21 corresponds to a substantially cylindrical portion.

  A plurality of terminal fittings 42 serving as metal terminals are provided below the terminal support portion 41. The three terminal fittings 42 on the left side shown in FIG. 1 are connected with the primary winding 51 electrically connected, and the three terminal fittings 42 on the right side shown in FIG. 1 are connected with the secondary winding 52 electrically. To be connected. The lower end of the terminal fitting 42 is electrically connected to a conductive pattern on a mounting board (not shown).

  A plurality of winding guide projections 43 are provided on the front surface of the terminal support portion 41 shown in FIG. A bent lead-out portion 52B (described later) of the conducting wire 50 is hung on the winding guide convex portion 43 so that the bent lead-out portion 52B of the conducting wire 50 is positioned in front of the terminal support portion 41.

  The conducting wire 50 includes a primary winding 51 and a secondary winding 52, and each of the conducting wires 50 is formed of an insulating coated wire made of a copper wire with an insulating coating. The secondary winding 52 corresponds to one conducting wire, and the primary winding 51 corresponds to another conducting wire.

  One end of the primary winding 51 is electrically connected to the terminal fitting 42 disposed on the leftmost side, and is connected to the primary winding 51. The primary winding 51 is hung on the winding guide convex portion 43, and the outer periphery of the substantially cylindrical portion 21. It is wound directly on the surface. Here, since the part of the primary winding 51 wound around the outer peripheral surface of the substantially cylindrical portion 21 is covered with an insulating tape 22 described later, it does not appear in FIG. Although not shown, the portion near the other end of the primary winding 51 is hung on the winding guide convex portion 43 and the other end of the primary winding 51 is electrically connected to the terminal fitting 42. Has been connected.

  An insulating tape 22 is provided on the primary winding 51 wound around the substantially cylindrical portion 21 so as to cover the primary winding 51 over the entire circumference of the substantially cylindrical portion 21. A belt-like barrier tape 23 having a predetermined width in the axial direction of the substantially cylindrical portion 21 is provided on a portion of the insulating tape 22 corresponding to the vicinity of one end and the other end in the axial direction of the substantially cylindrical portion 21. It is provided by being directly attached to the insulating tape 22. The barrier tape 23 is provided over the entire circumference of the substantially cylindrical portion 21. The insulating tape 22 and the barrier tape 23 correspond to an insulating tape.

  Further, on the insulating tape 22, a strip-shaped double-sided adhesive tape 24 having a predetermined width is formed on the insulating tape 22 from a portion corresponding to the vicinity of one end in the axial direction of the substantially cylindrical portion 21 to a portion corresponding to the vicinity of the other end. It is provided directly attached to. The double-sided pressure-sensitive adhesive tape 24 is configured by providing a pressure-sensitive adhesive on both surfaces of a base material, and in a portion corresponding to the vicinity of one end in the axial direction of the substantially cylindrical portion 21 and a portion corresponding to the vicinity of the other end, a barrier tape 23 is affixed directly on the top. Therefore, the double-sided pressure-sensitive adhesive tape 24 is disposed so as to face the outer peripheral surface of the substantially cylindrical portion 21 so as not to move.

  The secondary winding 52 has a winding part 52A and a bent lead-out part 52B. The winding portion 52A is wound directly on the insulating tape 22 between the upper barrier tape 23 and the lower barrier tape 23 in a direction substantially perpendicular to the axial direction of the substantially cylindrical portion 21. Yes. One end 52AA and the other end (not shown) of the winding part 52A are disposed on a double-sided adhesive tape 24 that is directly affixed on the insulating tape 22.

  The bent lead-out portion 52B includes a portion from one end 52AA of the winding portion 52A to one end portion of the secondary winding 52 connected to the terminal fitting 42 from the other end (not shown) to the other end portion. The bent lead-out portion 52B is connected to one end 52AA of the winding portion 52A and is bent downward on the double-sided adhesive tape 24 in a direction orthogonal to the direction of the winding portion 52A. 43 is pulled out to the terminal fitting 42. Although not shown in the figure, the folding lead-out portion 52B (not shown) is connected to the other end (not shown) of the winding portion 52A and is folded downward on the double-sided adhesive tape 24 in the direction orthogonal to the winding portion 52A. It is bent, hung on the winding guide convex portion 43, and pulled out to the terminal fitting 42.

  A portion 52BA, which is a part of the bent lead-out portion 52B and connected to the winding portion 52A, sinks into the adhesive of the double-sided adhesive tape 24 in the thickness direction of the double-sided adhesive tape 24 on the double-sided adhesive tape 24. Yes. Further, a part of the bent lead-out portion 52B, that is, one end 52AA of the winding portion 52A and the vicinity of the other end (not shown) are most depressed. This occurs when the part is pressed against the double-sided adhesive tape 24 by the pressing jig 90 in the coil component manufacturing method described later. By sinking in this way, a part of the bent lead-out portion 52B that is connected to the winding portion 52A comes into contact with the adhesive of the double-sided adhesive tape 24 over a larger area, and the double-sided adhesive tape 24 It is firmly fixed and positioned. One end 52AA of the winding portion 52A and the end of the bent lead-out portion 52B connected to the other end correspond to a connection point.

  Next, the manufacturing method of a coil component is demonstrated based on FIG. 1 thru | or FIG. In the coil component manufacturing method described below, each process is performed by an automatic machine (not shown). First, in the manufacturing method of the coil component, the bobbin 20 is prepared and held in an automatic machine (not shown). Next, one end of the primary winding 51 is wound around the terminal fitting 42 of the bobbin 20 and fixed. Next, the primary winding 51 is pulled out so as to be hung on the winding guide convex portion 43, and the bobbin 20 is rotated about the axis of the substantially cylindrical portion 21 to be on the outer peripheral surface of the substantially cylindrical portion 21. The primary winding 51 is wound directly. Next, the primary winding 51 is pulled out so as to hang on the winding guide convex portion 43, and the other end portion of the primary winding 51 is wound around the terminal fitting 42 of the bobbin 20 and fixed. Then, one end and the other end of the primary winding 51 wound and fixed around the terminal fitting 42 of the bobbin 20 are electrically connected to the terminal fitting 42 and connected.

  Next, the insulating tape 22 is directly attached and wound on the primary winding 51 wound around the substantially cylindrical portion 21 so as to cover the primary winding 51 over the entire circumference of the substantially cylindrical portion 21. Next, the barrier tape 23 is directly affixed and wound on portions of the insulating tape 22 corresponding to the vicinity of one end and the other end in the axial direction of the substantially cylindrical portion 21. Next, on the insulating tape 22 and the barrier tape 23, the double-sided adhesive tape 24 is directly attached from a portion corresponding to the vicinity of one end in the axial direction of the substantially cylindrical portion 21 to a portion corresponding to the vicinity of the other end.

  Next, one end of the secondary winding 52 is wound around the terminal fitting 42 of the bobbin 20 and fixed. Next, the secondary winding 52 is pulled out so as to hang on the winding guide convex portion 43. Next, as shown in FIG. 2, the pressing jig 90 having a U-shaped portion 91 at the tip is moved from the left to the right in FIG. 1, and the U-shaped portion 91 is attached to the double-sided adhesive tape 24. Arrange them at opposite positions. Then, as shown in FIG. 2, the secondary winding 52 is applied to the inner portion of the U-shaped portion 91 and pulled in a direction orthogonal thereto, and the U-shaped portion 91 is pressed against the double-sided adhesive tape 24. To do. The position of the double-sided pressure-sensitive adhesive tape 24 that presses the U-shaped portion 91 is within the area of the double-sided pressure-sensitive adhesive tape 24 that is stuck on the lower barrier tape 23 and is stuck on the insulating tape 22. This is a position near the area of the tape 24.

  As a result, the secondary winding 52 is bent at a substantially right angle as shown in FIG. 1, and a portion closer to one end of the secondary winding 52 than the bent portion including the bent portion is bent out. A portion closer to the other end than that is a winding portion 52A. Further, a part 52BA that is a part of the bent lead-out portion 52B and is connected to the winding portion 52A sinks into the double-sided adhesive tape 24 and is fixed to the double-sided adhesive tape 24.

  Next, the pressing jig 90 is retracted, and the bobbin 20 is rotated about the axis of the substantially cylindrical portion 21, whereby the winding portion 52 </ b> A of the secondary winding 52 is placed on the insulating tape 22 of the substantially cylindrical portion 21. Wind directly.

  After winding the secondary winding 52 for a desired number of turns, the pressing jig 90 is moved from the left to the right in FIG. 1 and the U-shaped portion 91 is disposed at a position facing the double-sided adhesive tape 24. . Then, as shown in FIG. 3, the secondary winding 52 is hung on the outer portion of the U-shaped portion 91 and drawn in a direction orthogonal thereto, and pressed against the double-sided adhesive tape 24. The position of the double-sided pressure-sensitive adhesive tape 24 that presses the U-shaped portion 91 is the area of the double-sided pressure-sensitive adhesive tape 24 that is pasted on the lower barrier tape 23 in the same manner as the position where the U-shaped portion 91 is pressed earlier. It is a position in the vicinity of the area of the double-sided pressure-sensitive adhesive tape 24 that is on the insulating tape 22 inside.

  As a result, the secondary winding 52 is bent at a substantially right angle, and a portion closer to the other end (not shown) of the secondary winding 52 than the bent portion includes the bent portion 52C. (FIG. 3), and a portion closer to one end than that and other than the bent lead-out portion 53B formed earlier is a winding portion 52A. In addition, a part of the bent drawer portion 52 </ b> C that is connected to the winding portion 52 </ b> A sinks into the double-sided adhesive tape 24 and is fixed to the double-sided adhesive tape 24.

  Next, the secondary winding 52 is pulled out so as to hang on the winding guide convex portion 43. Next, the other end (not shown) of the secondary winding 52 is wound around the terminal fitting 42 of the bobbin 20 and fixed. Then, one end and the other end (not shown) of the secondary winding 52 wound and fixed around the terminal fitting 42 of the bobbin 20 are electrically connected to the terminal fitting 42 and connected. For the primary winding 51 and the secondary winding 52, the steps for the primary winding 51 and the secondary winding 52 described above for the desired number are performed. Finally, the core 10 is mounted to manufacture a coil component.

  The double-sided adhesive tape 24 includes a double-sided pressure-sensitive adhesive tape 24 that is disposed on the outer peripheral surface of the substantially cylindrical portion 21 so as not to move. The secondary winding 52 includes a winding portion 52A that is wound around the outer peripheral surface of the substantially cylindrical portion 21, A bent lead-out portion 52B that is connected to the turning portion 52A and bent and pulled out from the winding portion 52A on the double-sided adhesive tape 24, and is a part of the bent-out lead portion 52B and connected to the winding portion 52A. Since the portion that has been sunk in the thickness direction of the double-sided pressure-sensitive adhesive tape 24 on the double-sided pressure-sensitive adhesive tape 24, the bent drawer portion 52 </ b> B can be firmly fixed to the double-sided pressure-sensitive adhesive tape 24.

  For this reason, in the manufacturing process of the coil component, when the winding portion 52A is wound around the substantially cylindrical portion 21 after the folding lead portion 52B is submerged in the double-sided adhesive tape 24, the position of the bending lead portion 52B. Therefore, the winding portion 52A can be stably wound around the substantially cylindrical portion 21. Further, in the coil component manufacturing process, the winding portion 52A is wound around the substantially cylindrical portion 21 and the bent drawer portion (not shown) is submerged in the double-sided adhesive tape 24, and then the bent lead portion is joined to the terminal fitting 42. When the wire is drawn, the position of the bent drawer portion (not shown) can be stabilized, and therefore, the winding portion 52A wound around the substantially cylindrical portion 21 can be prevented from being unwound.

  An insulating tape 22 is provided so as to cover the primary winding 51 wound around the substantially cylindrical portion 21 over the entire circumference of the substantially cylindrical portion 21, and the double-sided adhesive tape 24 is directly attached onto the insulating tape 22. Therefore, the bent lead-out portion 52 </ b> B can be firmly fixed to the double-sided pressure-sensitive adhesive tape 24 for the secondary winding 52 wound directly on the insulating tape 22.

Moreover, since the connection point part connected to winding part 52A is sinking most in the part connected to winding part 52A which is a part of bending drawer part 52B, it is in winding part 52A. The closest connection point can be firmly fixed to the double-sided pressure-sensitive adhesive tape 24. For this reason, winding part 52A can be held more stably, the position of winding part 52A can be stabilized more, and it can prevent that position shift arises.

  In addition, since the bent lead-out portion 52B can be firmly fixed to the double-sided pressure-sensitive adhesive tape 24 as described above, the insulation distance between the primary winding 51 and the secondary winding 52 can be secured at a desired value. Can be easy. More specifically, for example, as shown in FIG. 4, when the secondary winding 152 is not configured to have the winding portion 52A and the bent lead-out portion 52B as in the present embodiment, the winding guide The secondary winding 152 drawn from the convex portion 43 is drawn obliquely from the winding guide convex portion 43 in the upper left direction and is wound around the substantially cylindrical portion 21. When the secondary winding 152 is drawn in this way, the insulation distance between the portion of the secondary winding 152 drawn obliquely and the portion of the primary winding 51 hung on the winding guide convex portion 43 is increased. It becomes shorter and a desired insulation distance cannot be secured. However, since the secondary winding 52 has a winding portion 52A and a bent lead-out portion 52B as in the present embodiment and is prevented from being pulled out obliquely, the insulation distance can be set to a desired value. Can be secured.

  The transformer of the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the double-sided pressure-sensitive adhesive tape 24 is directly affixed on the insulating tape 22, and the bent-out portion 52B of the secondary winding 52 is fixed to the double-sided pressure-sensitive adhesive tape 24. It is not limited.

  For example, as a configuration in which the primary winding 51 has a winding portion and a bent-out portion, the double-sided adhesive tape 24 is directly attached to the outer peripheral surface of the substantially cylindrical portion 21, and the bent-out portion of the primary winding 51 is May be fixed to the double-sided adhesive tape 24. By doing in this way, a bending drawer part can be firmly fixed to the double-sided adhesive tape 24 about the primary winding 51 wound directly on the outer peripheral surface of the substantially cylindrical part 21.

  Similarly, when the secondary winding is wound around the substantially cylindrical portion 21 and another secondary winding is wound, the double-sided adhesive tape 24 is directly applied to the previously wound secondary winding. It is affixed and the bending drawer part of the said another secondary winding may be fixed to the double-sided adhesive tape 24. FIG. By doing in this way, a bending drawer part can be firmly fixed to the double-sided adhesive tape 24 about the other secondary winding wound directly on the secondary winding wound previously.

  Further, the bent lead-out portion 52B is bent on the double-sided adhesive tape 24 in a direction orthogonal to the direction of the winding portion 52A, but the insulation distance between one conductor and the other conductor is set to a desired value. As long as it can be secured, the direction is not limited to the orthogonal direction, and may be bent in a direction forming a predetermined angle. For example, when one conductor and the other conductor each have a bent lead portion and a winding portion, the bent lead portion of one lead wire and the bent lead portion of the other lead wire are arranged in parallel. If it comes to be done, you may bend | fold in the direction which makes a predetermined angle with respect to the direction which a winding part points.

  Further, the secondary winding 52 corresponds to one conductive wire and the primary winding 51 corresponds to another conductive wire, but is not limited thereto. In the present embodiment, the present invention is applied to the transformer 1. However, the present invention is not limited to the transformer, and may be applied to other coil components such as a common mode filter.

  In the present embodiment, the bent drawer portion is pressed against the double-sided adhesive tape 24 by the pressing tool before and after the step of winding the winding portion 52A around the substantially cylindrical portion 21, but the present invention is not limited to this. Alternatively, the winding portion 52A may be pressed only before the step of winding the substantially cylindrical portion 21 or only after the step of winding the winding portion 52A on the substantially cylindrical portion 21. Also good.

  In the present embodiment, the secondary winding 52 is wound on the outer peripheral surface of the substantially cylindrical portion 21 around which the primary winding 51 is wound, and the primary winding 51, the secondary winding 52, Has a layer shape in the radial direction of the substantially cylindrical portion 21, but is not limited to being wound in this way. For example, the outer peripheral surface of the substantially cylindrical portion 21 is divided into a region in which the primary winding 51 is wound and a region in which the secondary winding 52 is wound. It may be wound directly on the outer peripheral surface of the cylindrical portion 21.

  The transformer 1 according to the present embodiment is a so-called vertical type in which when the transformer 1 is mounted on a mounting board (not shown), the axial direction of the substantially cylindrical portion 21 is perpendicular to the surface of the mounting board (not shown). Although it is a transformer, it is not limited to this, You may apply to what is called a horizontal transformer in which the axial direction of a substantially cylindrical shape part is oriented in parallel with the surface of the mounting substrate not shown.

  The coil component of the present invention is particularly useful in the field of transformers that are required to secure an insulation distance between the primary winding and the secondary winding at a desired value.

DESCRIPTION OF SYMBOLS 1 Transformer 10 Core 20 Bobbin 21 Substantially cylindrical part 22 Insulation tape 24 Double-sided adhesive tape 50 Conductor 51 Primary winding 52 Secondary winding 52A Winding part 52AA One end 52B of winding part Bending lead part 52BA Bending lead part Part of the part connected to the winding part

Claims (7)

A bobbin having a substantially cylindrical portion made of an insulating material and having an outer peripheral surface and an inner peripheral surface;
At least two conducting wires wound around the outer peripheral surface and having one conducting wire and another conducting wire;
A core inserted in a space defined by the inner peripheral surface;
A double-sided adhesive tape disposed on the outer peripheral surface so as to be immovable, and
The one conducting wire includes a winding portion wound around the outer peripheral surface of the substantially cylindrical portion, and a bent portion connected to the winding portion and bent from the winding portion on the double-sided adhesive tape. A drawer portion,
A part of the bent drawer part and connected to the winding part sinks in the thickness direction of the double-sided adhesive tape on the double-sided adhesive tape ,
A part of the bent lead-out part of the one conducting wire and a part connected to the winding part is one side of the double-sided pressure-sensitive adhesive tape, and is a surface on the side sinking into the double-sided pressure-sensitive adhesive tape A coil component , wherein the winding portion is wound around an outer peripheral surface of the substantially cylindrical portion so that the winding portion of the one conducting wire is disposed thereon.   The coil component according to claim 1, wherein the double-sided adhesive tape is directly attached to the outer peripheral surface. An insulating tape is provided so as to cover the other conducting wire wound around the substantially cylindrical portion over the entire circumference of the substantially cylindrical portion,
The double-sided adhesive tape is directly affixed on the insulating tape,
2. The coil component according to claim 1, wherein the one conducting wire is wound on the insulating tape.   2. The coil component according to claim 1, wherein the double-sided pressure-sensitive adhesive tape is directly affixed on the other wire wound around the substantially cylindrical portion.   2. A part of the bent lead-out portion that is connected to the winding portion, and a connection point portion connected to the winding portion is most depressed. The coil component according to claim 4. The at least two conductors have a primary winding and a secondary winding;
A transformer comprising the coil component according to any one of claims 1 to 5. A bobbin having a substantially cylindrical portion and having a core inserted in a space defined by the inner peripheral surface of the substantially cylindrical portion and at least two conductors wound around the outer peripheral surface of the substantially cylindrical portion. A step of disposing a double-sided pressure-sensitive adhesive tape on the outer peripheral surface of the substantially cylindrical portion so as not to move relative to the substantially cylindrical portion;
By bending one of the conducting wires, a part of the one conducting wire that is wound around the outer peripheral surface of the substantially cylindrical portion is used as a winding part, and is a part of the one conducting wire, A step of connecting the winding part to a bent-out part that is bent and pulled out from the winding part;
A part of the bent drawer portion and a portion connected to the winding portion is sunk into the double-sided pressure-sensitive adhesive tape by pressing against the double-sided pressure-sensitive adhesive tape in the thickness direction of the double-sided pressure-sensitive adhesive tape. And having a process
Before the step of making the folded drawer portion, or after the step of sinking in the double-sided adhesive tape, or before the step of making the folded drawer portion and after the step of sinking in the double-sided adhesive tape, On one side of the double-sided pressure-sensitive adhesive tape, which is a part of the bent lead-out portion of the one lead wire and connected to the winding portion, on the side where the double-sided pressure-sensitive adhesive tape is submerged A method for manufacturing a coil component, further comprising the step of winding the winding portion around the outer peripheral surface of the substantially cylindrical portion so that the winding portion of the one conducting wire is disposed .

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