JP2021151031A - Bobbin, coil bobbin, and coil stator - Google Patents

Abstract

To suppress a wire from being disconnected due to reception of a molding pressure of a resin mold in a pull-back part of a conductor to a terminal from a winding core part at the time of the resin mold.SOLUTION: A bobbin 3 structuring a coil stator, comprises: a winding core part 31; flange parts 33 and 34 formed on both ends of the winding core part 31; terminals 35A to 35C to which an end part pf a conductive wire 41 is connected; and a terminal holding part 36 holding each of the terminals 35A to 35C to a direction orthogonal to the winding core part 31 in parallel, which is provided to the flange part 33. Each of the flange parts 33 and 34 contains inner faces 33a and 34a and outer faces 33b and 34b in their shaft direction X. The terminal holding part 36 contains: grooves 36a and 36b penetrated between the adjacent terminals 35A to 35C along the shaft direction X of the winding core part 31; and a plurality of bases 36c to 36e which is divided with each of the grooves 36a and 36b, and in which one of the terminals 35A to 35C is arranged, respectively. Tension holding parts 38A to 38C in which one part of the conductive wire 41 is engaged in order to hold a tension of the conductive wire 41 are provided to the respective bases 36c to 36e so as to correspond to the side of the outer face 33b of the flange part 33.SELECTED DRAWING: Figure 5

Description

The techniques disclosed herein relate to, for example, bobbins, coil bobbins and coil stators used in motors and the like that make up electric valves for automobiles.

Conventionally, for example, a step motor used for an electric valve for an automobile or the like includes a coil stator as a component. The coil stator includes a coil bobbin in which a lead wire is wound around a resin bobbin. This coil bobbin is molded with an exterior resin material (insulation sealing material) from the viewpoint of water resistance, moisture resistance, dust resistance, and the like. When molding the resin, the coil bobbin is mounted on the mold as a work, and the outer periphery of the work is molded by the resin material by pouring the molten resin material into the mold. However, when this resin mold is formed, the conducting wire is pressed by the flow of the molten resin material into the work, tensile stress is generated in the conducting wire, and there is a risk of disconnection. In particular, in the lead-in portion where the lead wire is drawn from the terminal provided on the flange portion of the bobbin to the winding core portion, the lead wire becomes a crossover wire (a conductor that floats in the air or is wired along only one surface), and the crossover wire becomes a crossover wire. Tensile stress was generated in the part, and there was a risk of disconnection of the conducting wire.

Therefore, in order to solve the above problem, a technique (bobbin and coil stator) described in Patent Document 1 below has been proposed. This technique includes a bobbin that includes a winding core portion around which a conducting wire is wound, a flange portion formed at an axial end portion of the winding core portion, and a terminal provided on the flange portion. In this bobbin, a conductor guide portion is formed so as to extend in the circumferential direction on one end surface side (outer surface side) in the axial direction of the flange portion provided with the terminal. This conductor guide portion guides the lead-in portion of the conductor from the terminal to the winding core portion. Further, the flange portion provided with the terminal is provided with a tension holding portion for holding the tension of the conducting wire guided by the conducting wire guiding portion. Further, the conductor guide portion is provided with an external force holding portion for holding the guided conductor against an external force.

Japanese Unexamined Patent Publication No. 2012-124217

However, in the technique described in Patent Document 1, although measures against the molding pressure of the resin mold can be taken for the lead wire lead-in portion, the axial end surface side (inner surface side) of the flange portion, that is, the lead wire lead-in portion. On the opposite side (the pull-back portion of the lead wire), the lead wire that is pulled back from the winding core to the terminal remains as a crossover wire for a long time. Therefore, during the resin molding, the pull-back portion of the conducting wire may be broken due to the molding pressure of the resin mold.

This disclosure technique has been made in view of the above circumstances, and the purpose is to break the pull-back portion of the lead wire pulled back from the winding core portion to the terminal due to the molding pressure of the resin mold during the resin molding. It is an object of the present invention to provide a bobbin, a coil bobbin and a coil stator capable of suppressing this.

In order to achieve the above object, the bobbin according to claim 1 has an annular shape, a winding core portion around which a lead wire is wound, and a first flange portion formed at both ends of the winding core portion in the axial direction. The second flange portion, the first flange portion, and the second flange portion include an inner surface facing the winding core portion in the axial direction and an outer surface located on the opposite side of the inner surface, and the end portion of the lead wire is connected. In a bobbin provided with a plurality of terminals and a terminal holding portion provided on the first flange portion for holding the plurality of terminals in parallel in a direction orthogonal to the axial direction of the winding core portion, the terminal holding portion is The outer surface side of the first flange portion includes a groove penetrating along the axial direction of the winding core portion between adjacent terminals and a plurality of bases divided by the groove and each having one terminal arranged therein. Correspondingly, it is intended that the plurality of bases are provided with a tension holding portion in which a part of the conducting wire is engaged in order to hold the tension of the conducting wire.

According to the above bobbin configuration, when the conducting wire wound around the winding core portion is connected to the terminal, the conducting wire is pulled back from the winding core portion to the terminal via the groove and the tension holding portion. Here, the pull-back portion of the conducting wire to be pulled back to the terminal is connected to the terminal while engaging with the corner portion of the groove and the tension holding portion. Therefore, in the terminal holding portion, the crossover wire (in the state of floating in the air or being wired along only one surface) of the pull-back portion of the conductor is shortened, and the molding pressure of the resin mold is less likely to be applied to the pull-back portion of the conductor.

In order to achieve the above object, the bobbin according to claim 2 is formed so as to extend in the circumferential direction on the outer surface side of the first flange portion corresponding to a plurality of terminals in the bobbin according to claim 1. It is intended that the lead wire guide portion for guiding the lead wire drawn from the terminal to the winding core portion to the winding core portion is further provided.

According to the above bobbin configuration, in addition to the action of the bobbin according to claim 1, when the conducting wire is wound around the winding core portion, the conducting wire having one end connected to the terminal is pulled toward the winding core portion. Here, the lead-in portion of the lead wire drawn into the winding core portion is guided to the winding core portion along the lead wire guide portion via the tension holding portion. Therefore, on the outer surface side of the flange portion, the tension of the lead-in portion of the conducting wire is held by the tension holding portion, and the tensile stress with respect to the external force of the pull-in portion is relaxed. Further, since the lead-in portion of the conductor is guided along the lead-in guide portion, the crossover of the lead-in portion of the conductor is shortened, and the molding pressure of the resin mold is less likely to be applied to the lead-in portion of the conductor.

In order to achieve the above object, the bobbin according to claim 3 is the bobbin according to claim 2, wherein the conductor guide portion is formed with a conductor groove extending in the circumferential direction and in which the conductor is engaged. The purpose.

According to the above-mentioned bobbin configuration, in addition to the action of the bobbin according to claim 2, since the conductor is held while engaging with the conductor groove at the conductor guide portion, an external force in the width direction is applied to the conductor. However, the movement of the conductor in the width direction is restricted.

In order to achieve the above object, the coil bobbin according to claim 4 is a coil bobbin in which a lead wire is wound around the bobbin according to claim 2 or 3, and the lead wire is tensioned from a terminal on the outer surface side of the first flange portion. It is drawn into the winding core portion via the holding portion and the conducting wire guide portion, and is wound around the winding core portion multiple times to form a coil, which engages with the corner of the groove and the tension holding portion from the inner surface side of the first flange portion. The purpose is to return to the terminal while matching and to be connected to the terminal.

According to the configuration of the coil bobbin, the same operation as that of the bobbin according to claim 2 or 3 can be obtained.

In order to achieve the above object, the coil stator according to claim 5 is a coil stator provided with the coil bobbin according to claim 4, and the bobbin, the conducting wire and the outer periphery of the coil are molded with an exterior resin material. The purpose is.

According to the configuration of the coil stator, in addition to the action of the coil bobbin according to claim 4, the bobbin, the conductor and the coil are molded by the exterior resin material, so that the bobbin, the conductor and the coil are protected from moisture and damage.

In order to achieve the above object, the coil stator according to claim 6 is a coil stator provided with the coil bobbin according to claim 4, wherein the outer circumference of the coil, the inner circumference of the winding core portion, and the second flange A cup that houses the coil bobbin so as to cover the outer surface of the portion, a stator assembled to the cup so as to cover the outer surface of the first flange portion of the coil bobbin housed in the cup, and the inner circumference of the winding core portion, and the coil bobbin. Is housed in the cup, and in a state where the stator is assembled to the cup, the outer periphery of the cup and the stator is covered, and the exterior resin material filled in the closed space formed between the cup, the stator and the outer periphery of the coil is applied. The purpose is to prepare.

According to the configuration of the coil stator, in addition to the action of the coil bobbin according to claim 4, the bobbin, the conducting wire, the coil, the cup and the stator are made of an exterior resin in a state where the coil bobbin is housed in the cup and the stator is assembled to the cup. Molded with material, the bobbins, conductors, coils, cups and stators are protected from moisture and damage.

According to the bobbin according to claim 1, it is possible to prevent the pull-back portion of the lead wire pulled back from the winding core portion to the terminal from being broken due to the molding pressure of the resin mold during the resin molding.

According to the bobbin according to claim 2, in addition to the effect of the bobbin according to claim 1, at the time of resin molding, the lead-in portion of the lead wire from the terminal to the winding core portion receives the molding pressure of the resin mold. It is possible to suppress disconnection.

According to the bobbin according to claim 3, in addition to the effect of the bobbin according to claim 2, it is possible to prevent the conductor from moving or rubbing in the width direction of the conductor guide portion, and to secure the insulation of the conductor. be able to.

According to the coil bobbin according to claim 4, the same effect as that of the bobbin according to claim 2 or 3 can be obtained.

According to the coil stator according to the fifth aspect, in addition to the effect of the coil bobbin according to the fourth aspect, the durability of the coil stator provided with the bobbin, the conducting wire and the coil can be improved.

According to the coil stator according to the sixth aspect, in addition to the effect of the coil bobbin according to the fourth aspect, the durability of the coil stator provided with the bobbin, the conducting wire, the coil, the cup and the stator can be improved.

A side view showing a coil stator according to an embodiment. A vertical sectional view showing a coil stator according to an embodiment. A side view showing an assembled subcoil stator according to an embodiment. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 3 showing an assembled subcoil stator according to an embodiment. A perspective view showing the first bobbin as viewed from the front right side according to the embodiment. A perspective view showing the first bobbin as viewed from the front left side according to the embodiment. A front view showing a portion including a terminal holding portion of the first bobbin according to an embodiment. FIG. 7 is an enlarged cross-sectional view taken along line BB of FIG. 7 showing a first conductor guide portion and a second conductor guide portion according to an embodiment. A front view showing a first coil bobbin according to an embodiment. The rear view which shows the 1st coil bobbin which concerns on one Embodiment. The left side view which shows the 1st coil bobbin according to one Embodiment. FIG. 9 is a sectional view taken along line CC of FIG. 9 showing a first coil bobbin according to an embodiment. FIG. 11 is a sectional view taken along line DD of FIG. 11 showing a first coil bobbin according to an embodiment. A front view showing a part of the first coil bobbin (the part surrounded by the alternate long and short dash line circle in FIG. 9) according to the embodiment. A perspective view showing an assembled subcoil stator according to an embodiment. An exploded perspective view showing an assembled subcoil stator according to an embodiment.

Hereinafter, an embodiment in which the bobbin, the coil bobbin, and the coil stator are embodied will be described in detail with reference to the drawings.

[About coil stator]
First, the coil stator will be described. FIG. 1 shows a side view of the coil stator 1 in this embodiment. FIG. 2 shows the coil stator 1 in a vertical cross-sectional view. This coil stator 1 is used in the motor portion of an electric EGR valve, and a step motor is configured by combining with a rotor (not shown). As shown in FIG. 2, the coil stator 1 includes a first bobbin 3 and a second bobbin 4 arranged one above the other. A coil 5 is provided on each of the first bobbin 3 and the second bobbin 4. By providing the coil 5 on the first bobbin 3, the first coil bobbin 11 is configured. The second coil bobbin 12 is configured by providing the coil 5 on the second bobbin 4. Each bobbin 3 and 4 is formed of a resin material.

A first cup 15 and a first stator 16 formed of a metal material are provided corresponding to the first coil bobbin 11, respectively. The first coil bobbin 11 is housed in a space formed by the first cup 15 and the first stator 16 assembled to the first cup 15. The first subcoil stator 21 is composed of the first coil bobbin 11, the first cup 15, and the first stator 16.

Further, a second cup 17 and a second stator 18 formed of a metal material are provided corresponding to the second coil bobbin 12, respectively. The second coil bobbin 12 is housed in a space formed by the second cup 17 and the second stator 18 assembled to the second cup 17. The second subcoil stator 22 is composed of the second coil bobbin 12, the second cup 17, and the second stator 18.

Then, the first sub-coil stator 21 and the second sub-coil stator 22 are arranged so as to be coaxially stacked on top of each other to form a pair of sub-coil stators 25. FIG. 3 shows the assembled subcoil stator 25 in a side view. FIG. 4 shows the assembled subcoil stator 25 with a cross-sectional view taken along the line AA of FIG. As shown in FIGS. 2 and 3, a cap 27 formed of a metal material is superposed on the first subcoil stator 21.

Then, in this embodiment, as shown in FIG. 3, in a state where the cap 27 is superposed on the assembled subcoil stator 25, the outer circumferences of the cups 15 and 17 and the stators 16 and 18 are made of the exterior resin material 29. While being covered, the exterior resin material 29 is filled in the closed space formed between the cups 15 and 17, the stators 16 and 18, and the outer periphery of the coil bobbins 11 and 12. That is, the cups 15 and 17, the stators 16 and 18, and the coil bobbins 11 and 12 are resin-molded with the exterior resin material 29. As a result, the coil stator 1 shown in FIGS. 1 and 2 is formed.

That is, each cup 15, 17 combined as shown in FIG. 3, each stator 16, 18, and each coil bobbin 11, 12 are mounted on a mold as a work, and a molten resin material is poured into the mold to pour the molten resin material into the mold. The outer circumference and the inside are resin-molded with the exterior resin material 29. The winding cores 31 of the bobbins 3 and 4 form a cavity, and the wedge plates 16b and 18b of the stators 16 and 18 are incorporated into the cavity. A step motor is configured by incorporating a rotor (not shown) inside the stators 16 and 18 (wedge plates 16b and 18b).

[About bobbins]
Next, the bobbin will be described. In this embodiment, since the first bobbin 3 and the second bobbin 4 have the same configuration, only the first bobbin 3 will be described, and the description of the second bobbin 4 will be omitted. FIG. 5 shows a perspective view of the first bobbin 3 as viewed from the front right side. FIG. 6 is a perspective view of the first bobbin 3 viewed from the front left side. FIG. 7 is a front view showing a portion of the first bobbin 3 including the terminal holding portion 36 and the like.

As shown in FIGS. 5 to 7, the first bobbin 3 has an annular shape, and has a winding core portion 31 around which a conducting wire 41 (see FIG. 9 and the like) is wound, and both ends of the winding core portion 31 in the axial direction X. The first flange portion 33 and the second flange portion 34 formed in the above, the plurality of terminals 35A, 35B, 35C to which the end portions of the conducting wires 41 are connected, and the plurality of terminals 35A to 35C in the axial direction of the winding core portion 31. A terminal holding portion 36 provided on the first flange portion 33 for holding in parallel in a direction orthogonal to X, and an outer surface 33b (described later) of the first flange portion 33 corresponding to a plurality of terminals 35A to 35C. From the first conductor guide portion 37A and the terminal 35A for guiding the lead-in portion of the conductor 41 which is formed so as to extend in the circumferential direction on the side and is drawn from the terminal 35B toward the winding core portion 31 to the winding core portion 31. A second conductor guide portion 37B for guiding the lead-in portion of the conductor 41 drawn toward the winding core portion 31 to the winding core portion 31 is provided. The first flange portion 33 includes an inner surface 33a (see FIG. 11 and the like) facing the winding core portion 31 in the axial direction X thereof and an outer surface 33b located on the opposite side of the inner surface 33a. The second flange portion 34 includes an inner surface 34a facing the winding core portion 31 in the axial direction X thereof and an outer surface 34b (see FIG. 11 and the like) located on the opposite side of the inner surface 34a. The entire first bobbin 3 is integrally formed of a resin material. Each of the terminals 35A to 35C is made of a conductive metal material and has a constriction 35d and a hook 35e for locking a part of the conducting wire 41.

As shown in FIGS. 5 and 6, the terminal holding portion 36 includes a plurality of (two) grooves 36a and 36b penetrating along the axial direction X of the winding core portion 31 between adjacent terminals 35A to 35C. , A plurality (three) bases 36c, 36d, 36e which are divided by two grooves 36a and 36b and in which one terminal 35A to 35C is arranged respectively are included. In this embodiment, corresponding to the side of the outer surface 33b of the first flange portion 33, a plurality of bases 36c to 36e are engaged with a part of the conductor 41 in order to hold the tension of the conductor 41 (a plurality of bases 36c to 36e. The tension holding portions 38A, 38B, 38C of 3) are provided. Each of the tension holding portions 38A to 38C has a shape that is flat or curved outward so that a part of the conducting wire 41 is engaged in order to hold the tension of the conducting wire 41. Further, in FIGS. 5 to 7, a flow path 36f is formed adjacent to the tension holding portion 38C on the base 36e at the right end.

As shown in FIGS. 5 to 7, the first conductor guide portion 37A is formed so as to guide the conductor 41 connected to the central terminal 35B to the winding core portion 31. The second conductor guide portion 37B is formed so as to guide the conductor 41 connected to the terminal 35A on the left side to the winding core portion 31 in FIGS. 5 to 7. Further, the first flange portion 33 is formed with a notch portion 33c for introducing the conducting wire 41 from the outer surface 33b side of the first flange portion 33 to the winding core portion 31.

FIG. 8 shows the first conductor guide portion 37A and the second conductor guide portion 37B by an enlarged cross-sectional view taken along the line BB of FIG. As shown in FIG. 8, conductor grooves 39a and 39b extending in the circumferential direction and with which the conductors 41 are engaged are formed at the corners of the first conductor guide portion 37A and the second conductor guide portion 37B, respectively. The conductor 41 extending from the terminal 35B is guided while engaging with the first conductor groove 39a formed in the first conductor guide portion 37A, and the second conductor groove 39b of the second conductor guide portion 37B is guided from the terminal 35A. The extending conductor 41 is guided while engaging. The two conductors 41 guided by the conductor guides 37A and 37B in this way are wound together at the winding core 31 as a set.

[About coil bobbin]
Next, the coil bobbin will be described. In this embodiment, since the first coil bobbin 11 and the second coil bobbin 12 have the same configuration, only the first coil bobbin 11 will be described, and the description of the second coil bobbin 12 will be omitted.

FIG. 9 shows the first coil bobbin 11 in a front view. FIG. 10 shows the first coil bobbin 11 in a rear view. FIG. 11 shows the first coil bobbin 11 with a left side view. FIG. 12 shows the first coil bobbin 11 with a cross-sectional view taken along the line CC of FIG. FIG. 13 shows the first coil bobbin 11 with a cross-sectional view taken along the line DD of FIG. FIG. 14 shows a part of the first coil bobbin 11 (the portion surrounded by the alternate long and short dash line square in FIG. 9) with a front view. In FIGS. 11 to 13, the conductors 41 connected to the terminals 35A to 35C are not shown.

As shown in FIGS. 9 to 14, the first coil bobbin 11 is formed by winding the conducting wire 41 around the core portion 31 of the first bobbin 3 described above and winding the end portion of the conducting wire 41 around the terminals 35A to 35C. Will be done. On the side of the outer surface 33b of the first flange portion 33, the conductor 41 is formed from the two terminals 35A and 35B to the corresponding two tension holding portions 38A and 38B, the first conductor guide portion 37A and the second conductor guide portion 37B, and the cutting. The coil 5 is formed by being drawn into the winding core portion 31 via the notch portion 33c and being wound around the winding core portion 31 a plurality of times. Further, the first flange portion 33 is pulled back to the two terminals 35B and 35C while engaging with the corners of the grooves 36a and 36b (see FIG. 14) and the tension holding portions 38B and 38C from the side of the inner surface 33a. , It is wound and connected to each of the terminals 35B and 35C.

[About assembled sub coil stator]
Next, the assembled subcoil stator 25 including the first coil bobbin 11 and the second coil bobbin 12 configured as described above will be described. FIG. 15 shows the assembled subcoil stator 25 (with the cap 27 arranged on the lower side) in a perspective view. FIG. 16 shows the assembled subcoil stator 25 by an exploded perspective view. In FIGS. 15 and 16, the conductors 41 connected to the terminals 35A to 35C are not shown.

As shown in FIGS. 15 and 16, the first cup 15 has a substantially cylindrical shape, and has an annular bottom plate 15a, two arc plates 15b formed on the outer circumference of the bottom plate 15a, and an inner circumference of the bottom plate 15a. Includes a plurality of wedge plates 15c arranged at equal intervals and forming a wedge shape. In the first cup 15, the first coil bobbin 11 is housed in an annular space surrounded by a bottom plate 15a, an arc plate 15b, and a wedge plate 15c. The first stator 16 includes a substantially cylindrical bottom plate 16a and a plurality of wedge plates 16b arranged at equal intervals on the inner circumference of the bottom plate 16a to form a wedge shape. The first coil bobbin 11 is fitted into the first stator 16 in an annular space sandwiched between the bottom plate 16a and the wedge plate 16b. That is, the first coil bobbin 11 is housed in the annular space of the first cup 15, and the first stator 16 is assembled to the first cup 15 so as to cover the first coil bobbin 11. 21 is formed.

As shown in FIGS. 15 and 16, the second cup 17 has the same shape as the first cup 15, and has an annular bottom plate 17a, two arc plates 17b formed on the outer periphery of the bottom plate 17a, and a bottom plate 17a. Includes a plurality of wedge-shaped wedge plates 17c arranged at equal intervals on the inner circumference of the. In the second cup 17, the second coil bobbin 12 is housed in an annular space surrounded by a bottom plate 17a, an arc plate 17b, and a wedge plate 17c. The second stator 18 has the same shape as the first stator 16, and includes an annular bottom plate 18a and a plurality of wedge plates 18b arranged at equal intervals on the inner circumference of the bottom plate 18a to form a wedge shape. The second coil bobbin 12 is fitted into the second stator 18 in an annular space sandwiched between the bottom plate 18a and the wedge plate 18b. That is, the second coil bobbin 12 is housed in the annular space of the second cup 17, and the second stator 18 is assembled to the second cup 17 so as to cover the second coil bobbin 12, so that the second subcoil The stator 22 is formed.

Then, as shown in FIG. 15, the assembled subcoil stator 25 is configured by superimposing the first subcoil stator 21 and the second subcoil stator 22 so that their arc plates 15b and 17b are aligned with each other. NS. In this assembled subcoil stator 25, two openings 26 are formed between adjacent arc plates 15b and 17b. In the one opening 26, the terminal holding portion 36 of the first coil bobbin 11 and the terminal holding portion 36 of the second coil bobbin 12 are arranged so as to overlap each other, and the terminals 35A to 35C of both coil bobbins 11 and 12 are arranged in both cups 15. It protrudes from the outer circumference of 17.

[About the action and effect of bobbins, coil bobbins and coil stators]
According to the configurations of the bobbins 3, 4, the coil bobbins 11, 12, and the coil stator 1 described above, when the conducting wire 41 wound around the core portion 31 is connected to the two terminals 35B, 35C. , The conducting wire 41 is pulled back from the winding core portion 31 to the corresponding terminals 35B and 35C via the respective grooves 36a and 36b and the corresponding tension holding portions 38B and 38C. Here, the pull-back portion of the conducting wire 41 that pulls back from the winding core portion 31 to the terminals 35B and 35C is engaged with the corners of the grooves 36a and 36b or their vicinity and the tension holding portions 38B and 38C, respectively. It will be connected to 35C. Therefore, in the terminal holding portion 36, the crossover wire (the state of floating in the air or being wired along only one surface) of the pull-back portion of the conductor 41 becomes short, and the forming pressure of the resin mold is less likely to be applied to the pull-back portion of the conductor 41. That is, in the case of resin molding, as shown by black arrows in FIGS. 14 and 15, grooves 36a and 36b, flow paths 36f and conductor guide portions 37A and 37B provided in the terminal holding portions 36 of the bobbins 3 and 4 are provided. The molten resin material flows along the line, and the resin material flows in the direction along the wiring direction of the conducting wire 41. As a result, the pulled-back portion of the conducting wire 41 is less likely to receive the forming pressure in the shearing direction. Therefore, in the case of the resin mold, it is possible to prevent the pull-back portion of the lead wire 41, which is pulled back from the winding core portion 31 to the terminals 35B and 35C, from being broken due to the molding pressure of the resin mold.

According to the configurations of the bobbins 3 and 4, the coil bobbins 11 and 12, and the coil stator 1 in this embodiment, when the conductor 41 is wound around the winding core portion 31, the conductor 41 having one end connected to the two terminals 35A and 35B Is pulled toward the winding core portion 31. Here, the lead-in portion of the conductor 41 drawn from the terminals 35A and 35B to the winding core portion 31 passes through the corresponding tension holding portions 38A and 38B, and the winding core portion along the corresponding conductor guide portions 37B and 37A. You will be guided to 31. Therefore, on the side of the outer surface 33b of the first flange portion 33, the tension of the pull-in portion of the conducting wire 41 is held by the corresponding tension holding portions 38A and 38B, and the tensile stress with respect to the external force of the pull-in portion is relaxed. Further, since the lead-in portion of the conductor 41 is guided along the corresponding conductor guide portions 37A and 37B, the crossover of the lead-in portion of the conductor 41 is shortened, and the forming pressure of the resin mold is applied to the lead-in portion of the conductor 41. It becomes difficult. Therefore, in the case of the resin mold, it is possible to prevent the lead-in portion of the lead wire 41 from the terminals 35A and 35B to the winding core portion 31 from being disconnected due to the molding pressure of the resin mold.

According to the configurations of the bobbins 3, 4, the coil bobbins 11, 12, and the coil stator 1 in this embodiment, the conductor grooves corresponding to the conductor guides 37A, 37B corresponding to the terminals 35B and the conductors 41 extending from the terminals 35A. It is held while engaging with each of 39a and 39b. Therefore, even if an external force in the width direction (for example, the molding pressure of the resin mold) is applied to each conductor 41, the movement of each conductor 41 in the width direction is restricted. Therefore, it is possible to prevent the conductors 41 from moving or rubbing in the width direction in the conductor guides 37A and 37B, and it is possible to secure the insulation of the conductors 41.

According to the configuration of the coil stator 1 in this embodiment, each coil bobbin 11 and 12 is housed in the corresponding cups 15 and 17, and each bobbin is assembled with the stators 16 and 18 attached to the cups 15 and 17. 3, 4, the conducting wire 41, the coil 5, the cups 15 and 17, and the stators 16 and 18 are molded by the exterior resin material 29. Therefore, the bobbins 3 and 4, the conductor 41, the coil 5, the cups 15 and 17, and the stators 16 and 18 are protected from moisture and damage. Therefore, the durability of the coil stator 1 provided with the bobbins 3 and 4, the conductor 41, the coil 5, the cups 15 and 17, and the stators 16 and 18 can be improved.

It should be noted that this disclosure technique is not limited to the above-described embodiment, and a part of the configuration may be appropriately modified and implemented within a range that does not deviate from the purpose of the disclosure technique.

(1) In the above embodiment, two sub-coil stators 21 and 22, that is, a coil stator 1 including two coil bobbins 11 and 12 is configured. On the other hand, one sub-coil stator, that is, a coil stator including one coil bobbin can also be configured.

(2) In the above embodiment, the coil stator is used for the motor part of the electric EGR valve and the step motor is formed by the combination with the rotor, but the present invention is not limited to this, and other electric types are used. It can also be embodied in the coil stator used in the motor part (including the step motor or DC motor) of the valve.

This disclosed technology can be used, for example, for a coil stator which is a component of a step motor, a DC motor, or the like.

1 Coil stator 3 1st bobbin 4 2nd bobbin 5 Coil 11 1st coil bobbin 12 2nd coil bobbin 15 1st cup 16 1st stator 17 2nd cup 18 2nd stator 29 Exterior resin material 31 Winding core 33 1st flange 33a Inner surface 33b Outer surface 34 Second flange part 34a Inner surface 34b Outer surface 35A Terminal 35B Terminal 35C Terminal 36 Terminal holding part 36a Groove 36b Groove 36c Base 36d Base 36e Base 37A First conductor guide 37B Second conductor 38A Tension Holding part 38B Tension holding part 38C Tension holding part 39a 1st conductor groove 39b 2nd conductor groove 41 Conductor

Claims (6)

A winding core that forms an annular shape and around which a conducting wire is wound,
The first flange portion and the second flange portion formed at both ends of the winding core portion in the axial direction, and
The first flange portion and the second flange portion include an inner surface facing the winding core portion in the axial direction thereof and an outer surface located on the opposite side of the inner surface.
A plurality of terminals to which the ends of the conductors are connected,
In a bobbin provided with a terminal holding portion provided on the first flange portion for holding a plurality of the terminals in parallel in a direction orthogonal to the axial direction of the winding core portion.
The terminal holding portion includes a groove that penetrates between the adjacent terminals along the axial direction of the winding core portion, and a plurality of bases that are divided by the groove and each of which has one terminal arranged therein. Including
Corresponding to the outer surface side of the first flange portion, the plurality of bases are provided with tension holding portions with which a part of the conducting wires is engaged in order to hold the tension of the conducting wires. Bobbin to be. In the bobbin according to claim 1,
The conducting wire, which is formed so as to extend in the circumferential direction on the outer surface side of the first flange portion corresponding to the plurality of terminals and is drawn from the terminal toward the winding core portion, is guided to the winding core portion. The bobbin is characterized by being further provided with a conductor guide for the operation. In the bobbin according to claim 2,
A bobbin characterized in that a conductor groove extending in the circumferential direction and engaging with the conductor is formed in the conductor guide portion. In the coil bobbin in which the lead wire is wound around the bobbin according to claim 2 or 3.
The conducting wire is drawn from the terminal to the winding core portion via the tension holding portion and the conducting wire guiding portion on the outer surface side of the first flange portion, and is wound around the winding core portion a plurality of times. A coil bobbin in which a coil is formed, and the coil bobbin is pulled back to the terminal while engaging with the corner portion of the groove and the tension holding portion from the inner surface side of the first flange portion, and is connected to the terminal. The coil stator provided with the coil bobbin according to claim 4.
A coil stator characterized in that the bobbin, the conducting wire, and the outer periphery of the coil are molded with an exterior resin material. A coil stator provided with the coil bobbin according to claim 4.
A cup accommodating the coil bobbin so as to cover the outer circumference of the coil, the inner circumference of the winding core portion, and the outer surface of the second flange portion.
A stator assembled to the cup so as to cover the outer surface of the first flange portion of the coil bobbin housed in the cup and the inner circumference of the winding core portion.
With the coil bobbin housed in the cup and the stator assembled to the cup, the cup and the outer periphery of the stator are covered, and the closure formed between the cup, the stator and the outer periphery of the coil. A coil stator characterized by having an exterior resin material filled in the space.

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