Coil device and solenoid valve equipped with same

Abstract

To provide a coil device whose size can be reduced.SOLUTION: A coil device includes: a coil having a coil wire; a body part which is a coil bobbin made of resin, around which the coil wire is wound, and which extends in an axial direction; a coil bobbin having a first flange part extending outward from one end portion of the body part in the axial direction, and a second flange part extending outward from the other end portion of the body part in the axial direction; a first connector part provided on the first flange part; a second connector part provided on the second flange part; and a current-carrying member whose end portions form terminals at the first and second connector parts and which is embedded in the body part and extends in the axial direction of the body part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a coil device for generating a magnetic field. [Background technology]

[0002] As a coil device that generates a magnetic field, for example, the coil device of Patent Document 1 is known. The coil device of Patent Document 1 has a coil bobbin around which a coil wire is wound. An electronic component such as a temperature sensor is provided at one end of the coil bobbin. The coil bobbin also has a slit extending in the axial direction formed in the body around which the coil wire is wound. A conductive wire is disposed in the slit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6243754 specification Summary of the Invention [Problem to be solved by the invention]

[0004] The coil device of Patent Document 1 requires slits for arranging the conductive wires, which results in an increase in size to ensure the strength of the coil bobbin, that is, an increase in size of the coil device.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a coil device that can be made compact. [Means for solving the problem]

[0006] The coil device of the present invention comprises a coil having a coil wire, a resin coil bobbin having a body around which the coil wire is wound and extending in an axial direction, a first flange portion protruding outward from one axial end portion of the body, and a second flange portion protruding outward from the other axial end portion of the body, a first connector portion provided on the first flange portion, a second connector portion provided on the second flange portion, and an electrically conductive member whose ends form terminals in the first and second connector portions, is embedded in the body portion, and extends in the axial direction of the body portion.

[0007] According to the present invention, since the current-carrying member is embedded in the body, it is possible to avoid forming a passage for arranging the current-carrying member in the coil bobbin or arranging the current-carrying member so as to avoid the coil bobbin, which simplifies the handling of the current-carrying member and, as a result, makes it possible to reduce the size of the coil bobbin, i.e., the coil device.

[0008] The solenoid valve of the present invention includes the above-mentioned coil device.

[0009] According to the present invention, it is possible to provide a solenoid valve having the above-mentioned operational effects. Effect of the Invention

[0010] According to the present invention, the coil device can be made smaller. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a coil device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a front view of the coil device of FIG. 1. [Diagram 3] 2 is a front cross-sectional view of the coil device of FIG. 1 taken along a virtual plane P1 shown in FIG. [Figure 4] 2 is a plan view showing the wiring members and protective members of the coil device in FIG. 1. [Diagram 5]3 is a left-side cross-sectional view showing the coil device of FIG. 2 taken along line VV. [Figure 6] 3 is a left side view of the coil device of FIG. 2 as seen from the left side. [Figure 7] 3 is a right side view of the coil device of FIG. 2 as viewed from the right side. [Figure 8] 2 is a front view showing a current-carrying member of the coil device of FIG. 1. [Figure 9] 2 is a cross-sectional view showing a tank valve device having an electromagnetic valve equipped with the coil device of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the coil device 1 and solenoid valve 2 according to the embodiment of the present invention will be described with reference to the drawings mentioned above. Note that the concept of direction used in the following description is used for convenience in the description and does not limit the orientation of the configuration of the invention to that direction. Also, the coil device 1 and solenoid valve 2 described below are merely one embodiment of the present invention. Therefore, the present invention is not limited to the embodiment, and additions, deletions, and modifications are possible within the scope of the spirit of the invention.

[0013] <Coil device> 1 is applied to an electromagnetic device such as a solenoid valve, a voice coil motor, etc. In this embodiment, the coil device 1 has a coil 10, a coil bobbin 11, a first connector portion 12, a second connector portion 13, a current-carrying member 14, and a third connector portion 15.

[0014] [coil] 2, the coil 10 has a coil wire 20 made of metal. The coil wire 20 is wound around a coil bobbin 11, which will be described later. In this way, the coil 10 is configured around the coil bobbin 11, which will be described later. The coil 10 generates a magnetic field when a current is passed through the coil wire 20.

[0015] [Coil bobbin] The coil bobbin 11 is a member on which the coil wire 20 is wound. The coil bobbin 11 is a member that holds the coil 10 formed by the wound coil wire 20. The coil bobbin 11 is made of resin, and is made of PE, PP, or PBT in this embodiment. The coil bobbin 11 has a body portion 21, a first flange portion 22, and a second flange portion 23 as shown in FIG. 3. More specifically, the coil bobbin 11 is formed in a cylindrical shape. A magnetic body (not shown, for example, a plunger 63 described later) is inserted into the coil bobbin 11 so as to be relatively movable along the axis L1. The cross section of the coil bobbin 11 is not limited to a circular shape, and may be formed, for example, in a cylindrical shape having a polygonal cross section.

[0016] The trunk portion 21 is a cylindrical member around whose outer circumferential surface the coil wire 20 is wound. The trunk portion 21 has a trunk main body 31 and a protective member 32. More specifically, the trunk portion 21 is formed to be cylindrical and thin-walled. The trunk portion 21 extends in the axial direction in which the axis of the trunk portion 21 extends. The axis of the trunk portion 21 coincides with the axis L1 described above in this embodiment.

[0017] The trunk body 31 is formed in a cylindrical shape. The coil 10 is wound around the outer peripheral surface of the trunk body 31. In this embodiment, the trunk body 31 is formed in a cylindrical shape. The thickness of the trunk body 31 in the inner and outer directions is approximately the same as or slightly thicker than the protective member 32, which will be described in detail later. Note that the thickness of the trunk body 31 in the inner and outer directions is the thickness of the trunk body 31 in the radial direction in this embodiment. In this embodiment, the trunk body 31 is formed to be thin enough to allow the entire protective member 32 to be embedded.

[0018] The protective member 32 is a sheet-like member that protects the current-carrying member 14. More specifically, the protective member 32 has two protective sheets 41, 42 as shown in FIG. 4. The two protective sheets 41, 42 are thin sheets that are rectangular in plan view and made of the same synthetic resin as the body 31 in this embodiment. The protective member 32 is configured by overlapping the two protective sheets 41, 42 so that their main surfaces face each other. Therefore, the protective member 32 is formed in a laminated sheet shape by the protective sheets 41, 42. The protective member 32 has the same shape as the outer periphery of the body 31, and in this embodiment, the protective member 32 is curved with the same radius of curvature as the body 31. The protective member 32 is embedded in the body 31 so as to form a part of the body 21. In this embodiment, the entire protective member 32 is embedded in the body 31, but it is not necessarily required to be configured in this way. That is, the protective member 32 may be formed so that one surface in the thickness direction of the protective member 32 is exposed from the body 31.

[0019] Each of the protective sheets 41 and 42 has a plurality of wiring grooves 41a and 42a extending in the longitudinal direction formed on the main surface. In this embodiment, each of the protective sheets 41 and 42 has a pair of wiring grooves 41a and 42a formed therein. It is not necessary that both the wiring groove 41a and the wiring groove 42a are formed, and it is sufficient that at least one of them is formed. Furthermore, each of the wiring grooves 41a formed in one protective sheet 41 is formed so as to face each of the wiring grooves 42a formed in the other protective sheet 42. The pair of wiring grooves 41a and 42a form wiring passages 32a and 32b together with the wiring grooves 42a and 41a facing each other when the two protective sheets 41 and 42 are overlapped.

[0020] In addition, the protective sheets 41 and 42 are formed with a plurality of notches 41b and 42b on both sides of the outer periphery in the width direction. In FIG. 4, the notches 41b and 42b of the protective sheets 41 and 42 are marked with a single reference numeral, and the reference numerals of the other portions are omitted. In this embodiment, seven notches 41b and 42b are formed on the outer periphery of each of the protective sheets 41 and 42. The four notches 41b and 42b are arranged at intervals. In addition, the notches 41b and 42b of the protective sheets 41 and 41 are arranged so as to be staggered when the protective sheets 41 and 42 are overlapped. That is, in the protective member 32, when viewed from one side in the thickness direction, a portion between the notch 41b of one protective sheet 41 and the notch 42b of the other protective sheet 42 is exposed. When viewed from the other side in the thickness direction, the portion between the notch 42b of the other protective sheet 42 and the notch 41b of the one protective sheet 41 is exposed.

[0021] The first flange 22 is formed at one axial end of the body portion 21 as shown in Figs. 1 and 3. That is, the first flange 22 is formed at one axial end of the body portion 21. The first flange 22 is formed so as to protrude outward (radially outward) from the one axial end of the body portion 21. More specifically, the first flange 22 is formed over the entire circumferential circumference at the one axial end. The radial height of the first flange 22 is formed to be higher than the radial height of the coil 10 configured on the body portion 21.

[0022] The second flange 23 is formed at the other axial end of the body 21. That is, the second flange 23 is formed at the other axial end of the body 21. The second flange 23 is formed so as to protrude outward (radially outward) from the other axial end of the body 21. To explain in more detail, the second flange 23 is formed over the entire circumferential direction at the other axial end. The radial height of the second flange 23 is formed higher than the radial height of the coil 10 configured in the body 21. The second flange 23 forms an annular coil accommodating space 24 between itself and the first flange 22. In the coil accommodating space 24, the coil wire 20 is wound around the outer circumferential surface of the body 21 to configure the coil 10.

[0023] 1 and 5, the second flange 23 has double wall portions 23a and 23b in a part thereof. That is, the second flange 23 has two walls 23a and 23b. The double wall portions 23a and 23b may be formed over the entire circumference of the second flange 23. The two walls 23a and 23b are spaced apart in the axial direction over a part or the entire circumferential direction of the second flange 23. As a result, a connecting groove 23c is formed between the two walls 23a and 23b. That is, the connecting groove 23c extends in the circumferential direction on the outer circumferential surface of the second flange 23. Also, the wall portion 23a on the first flange 22 side of the two walls 23a and 23b has notched passages 23d and 23e formed therein. The notched passages 23d and 23e both penetrate the wall portion 23a. The notched passages 23d and 23e communicate with the connection groove 23c and the coil accommodating space 24. The coil wire 20 is passed through each of the notched passages 23d and 23e. As a result, both ends of the coil wire 20 are drawn between the double wall portions 23a and 23b. In addition, a communication hole 23f is formed in the other wall portion 23b as shown in FIG. 6. The communication hole 23f penetrates the wall portion 23b. The communication hole 23f is disposed in the second flange portion 23 away from the second connector portion 13 in the circumferential direction.

[0024] [First connector part] The first connector portion 12 shown in Figs. 1 to 3 is provided on the first flange portion 22 of the body portion 21. More specifically, the first connector portion 12 is made of synthetic resin. In this embodiment, the first connector portion 12 is made of the same material as the coil bobbin 11. The first connector portion 12 is formed in a cylindrical shape. The first connector portion 12 is not limited to a cylindrical shape, and may be formed in a columnar shape having a polygonal cross section. An insertion hole 12a is formed in the first connector portion 12. The insertion hole 12a extends in the axial direction in the first connector portion 12. In this embodiment, the number of insertion holes 12a is multiple, and two insertion holes 12a are formed. The two insertion holes 12a are formed so as to be parallel to each other near the axis of the first connector portion 12. In this embodiment, the first connector portion 12 is a male connector portion. That is, the first connector portion 12 has an insertion hole 12b at one axial end portion, which is a portion on one axial side. The first connector portion 12 is connected to, for example, an electronic component (for example, a temperature sensor 52 described later) or a component connector that is connected to an electronic component. Then, for example, an electronic component having a female connector or a component connector that is a female connector is inserted into the insertion hole 12b.

[0025] 3, the first connector portion 12 is provided on the first flange portion 22 so as to protrude one axial end portion thereof. Note that, since the coil bobbin 11 is molded (i.e., insert molding) in a state in which the other axial end portion of the first connector portion 12, which is an insert part, is inserted into the first flange portion 22, the other axial end portion of the first connector portion 12 is integrally formed with the first flange portion 22.

[0026] [Second connector part] The second connector portion 13 shown in FIG. 1 is provided on the second flange portion 23 of the body portion 21. The second connector portion 13 is disposed at a different position in the radial direction from the first connector portion 12 when viewed from the axial direction. More specifically, the second connector portion 13 is made of synthetic resin. In this embodiment, the second connector portion 13 is made of the same material as the coil bobbin 11. The second connector portion 13 is formed in a cylindrical shape. The first connector portion 12 is not limited to a cylindrical shape, and may be formed in a columnar shape having a polygonal cross section. The second connector portion 13 is formed with an insertion hole 13a. The insertion hole 13a penetrates the second connector portion 13 in the axial direction. In this embodiment, the number of insertion holes 13a is multiple, and two insertion holes 13a are formed. The two insertion holes 13a are formed so as to be parallel to each other near the axis of the second connector portion 13. The second connector portion 13 is connected to an appliance connector (for example, an appliance connector 53a described later) that is connected to an electronic device such as a control device.

[0027] 3, the second connector portion 13 is provided in the second flange portion 23 by inserting one axial end portion, which is a portion on one axial side, into the second flange portion 23. The second connector portion 13 has the other axial end portion, which is a portion on the other axial side, protruding from the second flange portion 23. Therefore, the other axial end portion of the second connector portion 13 is also formed integrally with the second flange portion 23 when the coil bobbin 11 is insert molded.

[0028] The second connector portion 13 is disposed offset inward and outward from the first connector portion 12 when viewed in the axial direction, i.e., in the radial direction of the body portion 21. That is, the second connector portion 13 overlaps a portion of the first connector portion 12 when viewed in the axial direction, and their axes are disposed offset from each other in the radial direction. Therefore, the insertion hole 13a of the second connector portion 13 is also disposed at a different position in the radial direction from the insertion hole 12a of the first connector portion 12. In this embodiment, the second connector portion 13 is a female connector, and a terminal of an equipment connector, which is a male connector, is inserted into the insertion hole 13a from the other axial end side of the second connector portion 13.

[0029] [Electrically conductive materials] The current-carrying member 14 shown in FIG. 4 is provided so as to bridge the first connector portion 12 and the second connector portion 13. The ends of the current-carrying member 14 form terminals 14a, 14b in the first connector portion 12 and the second connector portion 13. The current-carrying member 14 is embedded in the body portion 21 and extends in the axial direction in the body portion 21. More specifically, the middle portion 14c (corresponding to a middle portion 25a described later) of the current-carrying member 14 is sandwiched between the protective members 32 from the radially inner and outer sides in the body portion 21. More specifically, the middle portion 14c of the current-carrying member 14 is covered and sandwiched between the protective sheets 41, 42 from the radially inner and outer sides, respectively. As a result, the current-carrying member 14 is protected by the protective member 32. By sandwiching and protecting the current-carrying member 14 in this manner, it is possible to suppress bending of the current-carrying member 14 due to a load generated in the current-carrying member 14.

[0030] More specifically, the current-carrying member 14 has at least two current-carrying core metals 25. In this embodiment, the current-carrying member 14 has two current-carrying core metals 25. Note that the current-carrying member 14 does not necessarily have to be a plurality of current-carrying core metals 25, and may be a current-carrying printed circuit board or the like. In other words, the current-carrying member 14 may be a member that has terminals 14a, 14b at both ends and that can pass current through the terminals 14a, 14b.

[0031] The conductive core metal 25 is a wire arranged to extend in the axial direction in the body 21. One end of the conductive core metal 25 forms the first terminal 14a in the first connector portion 12. The first terminals 14a of the two conductive core metals 25 are inserted into the insertion holes 12a of the first connector portion 12. Therefore, the first terminals 14a of the conductive core metals 25 are arranged in the first connector portion 12 with a first terminal distance α therebetween (see FIG. 7). The first terminal distance α is the axial distance between the first terminals 14a. In this embodiment, the tip portion of each of the first terminals 14a protrudes into the insertion hole 12b. For example, an electronic component or a component connector is inserted into the insertion hole 12b. The first terminals 14a are inserted into the insertion hole of the electronic component or the component connector. This connects the first connector portion 12 to the electronic component or the component connector.

[0032] The other end of the conductive core metal 25 forms the second terminal 14b in the second connector portion 13. The second terminals 14b of the two conductive core metals 25 are inserted into the insertion holes 13a of the second connector portion 13. Therefore, the second terminals 14b of the conductive core metals 25 are arranged at a second inter-terminal distance β in the second connector portion 13. The first inter-terminal distance α and the second inter-terminal distance β are different from each other. The second inter-terminal distance β is the axial distance of the second terminals 14b. The second terminals 14b are butted against the terminals of the device connector inserted into the insertion holes 13a. This connects the second connector portion 13 and the device connector.

[0033] As shown in FIG. 8, the first terminal 14a and the second terminal 14b of the conductive core bar 25 are different from each other in the radial distance from the intermediate portion 25a. More specifically, the conductive core bar 25 is formed in an Ω shape. The intermediate portion 25a is formed in a straight line. The first terminal 14a and the second terminal 14b at both ends of the conductive core bar 25 are also formed in a straight line and are formed parallel to the intermediate portion 25a. The intermediate portion 25a and each terminal 14a, 14b are connected by the connecting portions 25b, 25c. The radial lengths, i.e., the heights H1, H2, of the connecting portions 25b, 25c are different from each other. Therefore, when the two conductive core bar 25 are arranged in a V shape as viewed in the axial direction, the first inter-terminal distance α and the second inter-terminal distance β can be made different from each other. In the two conductive core metals 25, the first inter-terminal distance α and the second inter-terminal distance β can be changed by rotating the intermediate portion 25a about the axis in a direction in which the terminals 14a, 14b move away from each other. As described above, the first connector portion 12 and the second connector portion 13 are disposed at different positions in the radial direction of the body portion 21. To explain in more detail, the insertion hole 12a of the first connector portion 12 and the insertion hole 13a of the second connector portion 13 are disposed at different positions in the radial direction of the body portion 21. Therefore, when the heights H1, H2 of the connecting portions 25b, 25c are set to heights corresponding to the positions of the insertion holes 12a, 13a, the inter-terminal distances α and β can be easily changed by rotating the intermediate portion 25a of the conductive core metal 25.

[0034] The conductive core bar 25 thus configured has its middle portion 25a embedded in the body 21. More specifically, the conductive core bar 25 is disposed at a position in the body 21 corresponding to the protective member 32. The middle portion 25a of the conductive core bar 25 is sandwiched between the protective members 32 from the inside and outside of the body 21. More specifically, the middle portion 25a of the conductive core bar 25 is covered with protective sheets 41 and 42 from both sides (the inside and outside of the body 21) in the direction perpendicular to the paper surface as shown in FIG. 4. At this time, each of the middle portions 25a is disposed in each of the wiring grooves 41a of the protective sheet 41 and each of the wiring grooves 42a of the protective sheet 42. Then, the middle portion 25a is inserted into the wiring passages 32a and 32b formed by the wiring grooves 41a and 42a. As a result, the middle portion 25a is sandwiched between the protective members 32 formed by the protective sheets 41 and 42. The intermediate portion 25 a is protected by a protective member 32 .

[0035] [Third connector part] The third connector portion 15 shown in FIG. 1 to FIG. 3 is a portion for connecting a coil connector (for example, a coil connector 54a described later) for supplying electricity to the coil 10. The third connector portion 15 is provided on the second flange portion 23 of the body portion 21. Also, the third connector portion 15 is provided at a position overlapping the communication hole 23f in the second flange portion 23 when viewed from the other axial direction as shown in FIG. 6. That is, the third connector portion 15 is disposed circumferentially away from the second connector portion 13 when viewed from the other axial direction. More specifically, the third connector portion 15 is made of synthetic resin. In this embodiment, the third connector portion 15 is also made of the same material as the coil bobbin 11. The third connector portion 15 is formed in a cylindrical shape. Also, an insertion hole 15a is formed in the third connector portion 15. In this embodiment, two insertion holes 15a are formed in the third connector portion 15. The two insertion holes 15a penetrate the third connector portion 15 in the axial direction. The two insertion holes 15a are formed parallel to each other and spaced apart from each other near the axis of the third connector portion 15. The coil terminals 26 are inserted into the two insertion holes 15a, respectively. The coil terminals 26 are inserted into one axial side of the two insertion holes 15a. The coil terminals 26 protrude into the connection grooves 23c through the communication holes 23f. The axial ends of the coil terminals 26 are connected to the ends 20a, 20b of the coil wire 20 in the connection grooves 23c. The connection grooves 23c are filled with resin (e.g., potting agent). In this way, the coil wire 20 and the coil terminals 26 of the third connector portion 15 are connected between the double wall portions 23a, 23b, so that the connection work between the coil wire 20 and the coil terminals 26 can be easily performed. Furthermore, for example, a terminal of a male coil connector is inserted into the insertion hole 13a at the other axial end of the third connector portion 15. This connects the third connector portion 15 and the coil connector. Then, electricity can be supplied to the coil 10 by supplying electricity to the third connector portion 15 from the coil connector.

[0036] [Manufacturing of coil devices] The coil device 1 is manufactured using a mold. In this embodiment, the coil device 1 is manufactured by injection molding, in which synthetic resin is injected into a mold. The manufacturing method of the coil device 1 will be briefly described below.

[0037] In the coil device 1, as shown in Fig. 4, a wiring member 40 is prepared in which a first connector portion 12 and a second connector portion 13 are attached to a conductive core bar 25. Next, as shown in Fig. 4, a protective member 32 is attached to a middle portion 25a of the conductive core bar 25 in the wiring member 40. To explain in more detail, the protective member 32 sandwiches the middle portion 25a of the conductive core bar 25 between protective sheets 41, 42 from each radial direction such that the middle portion 25a is positioned in the wiring passages 32a, 32b. In this way, the middle portion 25a is protected by the protective member 32.

[0038] Next, the body 21, the first flange 22, and the second flange 23 are molded using a mold not shown. At this time, the wiring member 40 and the third connector 15 to which the protective member 32 is attached are fitted into the mold. Then, synthetic resin is poured into the mold to mold the coil bobbin 11. Here, each connector 12, 13, 15 is inserted into the corresponding flange 22, 23. The protective member 32 is placed in the mold so as to be embedded in the body main body 31. When the wiring member 40, the third connector 15, the protective member 32, etc. are placed in the mold in this way and the coil bobbin 11 is insert molded, the coil bobbin 11 is molded in which the three connectors 12, 13, 15 are integrated and the current-carrying member 14 is embedded. The three connectors 12, 13, 15 and the protective member 32 are made of the same material as the coil bobbin 11 in this embodiment. Then, when the coil wire 20 is wound around the body portion 21 of the coil bobbin 11 to form the coil 10 around the body portion 21, the coil device 1 is completed.

[0039] In the coil device 1 thus produced, the current-carrying member 14 is sandwiched and protected by the protective member 32, so that bending of the current-carrying member 14 due to the load acting on the current-carrying member 14 can be suppressed. In particular, when producing the coil bobbin 11 by insert molding, it is necessary to pour synthetic resin into a mold at a high inflow pressure in order to form a thin-walled body 21. In this case, the current-carrying member 14 receives a load from the inflow resin. By protecting the current-carrying member 14 by sandwiching it between the protective member 32, bending of the current-carrying member 14 due to the load received from the inflow resin can be suppressed.

[0040] [Functions and effects of the coil device] In the coil device 1 of this embodiment, the current-carrying member 14 is embedded in the trunk portion 21, so it is possible to avoid forming a separate passage in the coil bobbin 11 for arranging the current-carrying member 14, or arranging the current-carrying member 14 in a way that avoids the coil bobbin 11. This simplifies the handling of the current-carrying member 14, and as a result, the coil bobbin 11 can be made more compact, i.e., the coil device 1 can be made more compact.

[0041] In the coil device 1, the conductive core metal 25 is formed such that the first inter-terminal distance α and the second inter-terminal distance β of the conductive core metal 25 are different from each other. Therefore, it is not necessary to use a separate member other than the connector parts 12 and 13 to change the inter-terminal distances α and β, so that the coil device 1 can be made space-saving and cost-saving. In the coil device 1, the protective member 32 has the notches 41b and 42b arranged alternately, and the portion between the notches 41b of the one protective sheet 41 and the notches 42b of the other protective sheet 42 is exposed. Therefore, by pouring resin into the notches 41b and 42b when molding the coil bobbin 11, the unity of the trunk main body 31 and the protective member 32 can be improved. Note that the trunk 21 may be formed thin enough that the protective member 32 is exposed on at least one side of the radial inner side and outer side of the trunk 21. In this case, the protective member 32 is outsert molded in the trunk main body 31. Even in such a case, the trunk main body 31 and the protective member 32 can be firmly joined together by injecting resin into the cutouts 41b and 42b as described above.

[0042] In addition, in the coil device 1, the connector parts 12, 13 are provided integrally with the flange parts 22, 23, respectively. This makes it possible to prevent the coil bobbin 11 and the connector parts 12, 13 from moving separately, causing the current-carrying member 14 to break, or the connector parts 12, 13 to come off from the coil bobbin 11, when vibrations and impacts act on the coil bobbin 11 or the connector parts 12, 13. However, the flange parts 22, 23 and the connector parts 12, 13 do not necessarily need to be integrated. For example, the connector parts 12, 13 may be provided so as to be inserted into the flange parts 22, 23.

[0043] Furthermore, in the coil device 1, the connector portions 12, 13 are provided integrally with the flange portions 22, 23, respectively. Therefore, after molding, the electronic device and the electronic component can be electrically connected by attaching an equipment connector and an electronic component (or a component connector) to the connector portions 12, 13. Therefore, the work of connecting the current-carrying member 14 of the coil device 1 to the electronic device and the electronic component is easy, and the assembly workability of the product to which the coil device 1 is applied is improved.

[0044] <Solenoid valve> In the following, a description will be given of a solenoid valve 2 as shown in Fig. 9, which is an example of a product to which the coil device 1 of this embodiment is applied. Note that, when the configuration of the solenoid valve 2 corresponds to the configuration of each of the above-mentioned embodiments, the same reference numerals as the corresponding configuration are used, and detailed description thereof will be omitted.

[0045] The solenoid valve 2 is provided in, for example, a tank valve device 3. The tank valve device 3 is provided in a pressure tank, for example, a high-pressure tank (hereinafter simply referred to as a "tank") 4. The tank 4 can store a fluid. In this embodiment, the fluid is a gas. For example, the gas is hydrogen and CNG. The tank valve device 3 seals a mouth portion 4a of the tank 4. The tank valve device 3 can send gas from the tank 4 by the solenoid valve 2 and stop the sending of gas.

[0046] The solenoid valve 2 also includes a coil device 1, a main valve body 61, a seat piston 62, a plunger 63, and a fixed magnetic pole 64. The solenoid valve 2 adjusts the opening degree of the flow path 51 by energizing the coil 10 of the coil device 1.

[0047] The coil device 1 is arranged so that the first flange 22 faces the bottom side of the tank 4 and the second flange 23 faces the opening side of the tank 4. The temperature sensor 52 is connected to the first connector 12, and the device connector 53a of the device wiring 53 is connected to the second connector 13. The device wiring 53 is connected to an electronic device. As a result, the temperature sensor 52 is connected to the electronic device via the wiring member 40. The coil connector 54a of the coil wiring 54 is connected to the third connector 15. The coil device 1 is supplied with power to the coil wire 20 via the coil wiring 54. For convenience of explanation, the second connector 13 and the third connector 15 are arranged at positions shifted by 180 degrees in FIG. 9, but the two connectors 13 and 15 do not necessarily need to be arranged in such relative positions. That is, the second connector 13 and the third connector 15 may be arranged at an acute angle as shown in FIG. 1.

[0048] In the solenoid valve 2 thus configured, the plunger 63 is attracted to the fixed magnetic pole 64 by energizing the coil 10 via the coil wiring 54. This causes the seat piston 62 to move via the plunger 63. This opens the pilot passage 61a of the main valve body 61, and the main valve body 61 opens the flow path 51. This causes the fluid in the tank 4 to be discharged. On the other hand, when the coil 10 is de-energized, the seat piston 62 pushes the main valve body 61 to close the flow path 51. This closes the flow path 51, and the discharge of the fluid from the tank 4 stops. In addition, in the solenoid valve 2, a signal is sent from the temperature sensor 52 to the device wiring 53 via the wiring member 40 and the device wiring 53. This also allows the electronic device to detect the temperature in the tank 4.

[0049] <Other embodiments> The product to which the coil device 1 of the present embodiment is applied is not limited to the solenoid valve 2, but may be any device that generates a magnetic field using a coil, such as a voice coil motor. In addition, in the coil device 1, the connector parts 12, 13, 15 are integrally provided on the flange parts 22, 23, but they do not necessarily have to be integral. That is, the connector parts 12, 13, 15 may be provided on the flange parts 22, 23 so as to fit into holes formed in the flange parts 22, 23. The first connector part 12 does not necessarily have to be a male connector part, and may be a female connector part. Similarly, the second connector part 13 and the third connector part 15 do not necessarily have to be female connector parts, and may be male connector parts.

[0050] Moreover, the current-carrying member 14 is not limited to the current-carrying core 25, and may be a printed circuit board or the like, as long as it is thin and current-carrying. The protective member 32 is not necessarily required in cases where the current-carrying member 14 is not bent during molding. The protective member 32 is not necessarily limited to the shape described above as long as it has a shape capable of protecting the current-carrying member 14. The distances α and β between the terminals of the current-carrying core 25 do not necessarily have to be different, and the radial distances between the middle part of the current-carrying core 25 and each end part do not necessarily have to be different. The current-carrying member 14 does not necessarily have to be sandwiched between the protective members 32. For example, the protective member 32 may not be required, and the current-carrying member 14 may be disposed only on one of the protective sheets 41. [Explanation of symbols]

[0051] 1 Coil device 2. Solenoid valve 10 Coil 11 Coil bobbin 12 First connector part 13 Second connector part 14 Current-carrying materials 14a 1st terminal 14b 2nd terminal 14c middle part 15 Third connector part 20 Coil wire 21 Torso 22 First flange part 23 Second flange part 23a, 23b Double-wall part 25 Energizing core metal 25a Intermediate part 32 Protection member α First terminal distance β Second terminal distance

Claims

1. A coil having a coil wire; a resin coil bobbin having a body portion around which the coil wire is wound and which extends in an axial direction, a first flange portion which protrudes outward from one axial end portion of the body portion, and a second flange portion which protrudes outward from the other axial end portion of the body portion; a first connector portion provided on the first flange portion; a second connector portion provided on the second flange portion; an end portion of the coil device that forms a terminal in the first and second connector portions and an electrically conductive member that is embedded in the body portion and extends in the axial direction of the body portion.

2. The body portion has a protective member, The coil device according to claim 1 , wherein the current-carrying member is sandwiched between the protective members from inside and outside the body portion.

3. The current-carrying member has at least two current-carrying core metals, one end of the conductive core metal forms a terminal that is disposed at a first terminal distance from the first connector portion, the other end of the conductive core forms a terminal that is disposed at the second connector portion with a second inter-terminal distance therebetween; The coil device according to claim 1 , wherein the first inter-terminal distance and the second inter-terminal distance are different from each other.

4. the two ends of the conductive core are different from each other in radial distance from the middle portion of the conductive core when viewed in the axial direction of the body portion, The coil device according to claim 3 , wherein the first connector portion and the second connector portion are disposed at different positions in an inner and outer direction when viewed in an axial direction of the body portion.

5. The coil device according to claim 1 , further comprising a third connector portion provided on the second flange portion and having a terminal for supplying electricity to the coil.

6. The second flange portion has a double wall portion spaced apart in the axial direction in a circumferential portion, The coil device according to claim 5 , wherein the coil wire and the terminal of the third connector portion are connected between the double wall portions.

7. A solenoid valve comprising the coil device according to any one of claims 1 to 6.

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