Stator unit and motor-operated valve using the same

Abstract

To provide a stator unit capable of improving reliability while securing waterproofness, and a motor operated valve using the same.SOLUTION: The stator unit includes a yoke, a stator coil, a filled resin portion made of a resin material, and a partition member having an opening into which a part of the yoke is inserted, a wire extending from the stator coil passes through the opening of the partition member, and one end of the wire is soldered to a power supply pin, and the filled resin portion covers the wire extending from the stator coil to a soldered portion in the opening, and the partition member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stator unit and a motor-operated valve using the same. [Background technology]

[0002] For example, a stator unit equipped with a stator coil is used to drive an electric valve that is placed in a fluid piping system and opens and closes the fluid flow path or controls the flow rate of the fluid. In some cases, it is necessary to ensure waterproofing to prevent moisture from reaching the stator coil in the stator unit.

[0003] Patent Document 1 discloses a stator unit in which stator coils are stacked one on top of the other and set in a mold in which a cover has been placed in advance, and a thermosetting resin such as urethane resin is poured into the mold as a molding resin by vacuum casting, and then hardened in a drying oven, and then removed from the mold, thereby covering and filling the entire stator coil with molding resin. According to the motor-operated valve of Patent Document 1, waterproofing can be achieved by surrounding the entire stator coil with molding resin such as urethane resin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-146299 Summary of the Invention [Problem to be solved by the invention]

[0005] A wire is wound around the stator coil, and one end of the wire is pulled out to supply power to the stator coil. Therefore, if the entire stator coil is enclosed in a molding resin, a portion of the pulled wire will be in close contact with the molding resin. In this state, if the ambient temperature around the motor-operated valve changes, the difference in linear expansion between the metal part and the molding resin may place a relatively large load on the wire.

[0006] An object of the present invention is to provide a stator unit that can improve reliability while ensuring waterproofing, and a motor-operated valve using the same. [Means for solving the problem]

[0007] The stator unit according to the present invention comprises: York and A stator coil; a filled resin portion made of a resin material; a partition member having an opening into which a portion of the yoke is inserted, a wire extending from the stator coil passes through an opening in the partition member, and one end of the wire is soldered to a power supply pin; The filled resin portion covers the wires extending from the stator coil to the soldered portion within the opening, and the partition member. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a stator unit that can improve reliability while ensuring waterproofing, and a motor-operated valve using the same. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a stator unit according to a first embodiment. [Figure 2] FIG. 2 is a top view showing the stator unit according to the first embodiment with the cover removed. [Figure 3] 3 is a side view of the stator unit of FIG. 2 as viewed in the direction of arrow A in FIG. [Figure 4] FIG. 4 is a vertical cross-sectional view of an annular intermediate obtained in the manufacturing process of the stator unit. [Figure 5] FIG. 5 is a side view of the BB cross section of the configuration shown in FIG. [Figure 6]FIG. 6 is an enlarged cross-sectional view of the partition member shown in FIG. [Figure 7] FIG. 7 is an enlarged view of part C in FIG. [Figure 8] FIG. 8 is an enlarged view of part D in FIG. [Figure 9] FIG. 9 is a cross-sectional view similar to FIG. 8 according to a comparative example. [Figure 10] FIG. 10 is a vertical cross-sectional view showing a stator unit according to the second embodiment. [Figure 11] FIG. 11 is a vertical cross-sectional view of an annular intermediate obtained in the manufacturing process of a stator unit. [Figure 12] 12 is an enlarged cross-sectional view showing the periphery of the partition member of FIG. [Figure 13] FIG. 13 is a side view of the intermediate body as viewed in the direction of arrow E in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The stator unit of the present invention can be used to drive an electric valve, for example, but is not limited to this.

[0011] (First embodiment) FIG. 1 is a longitudinal cross-sectional view showing a stator unit 10 according to a first embodiment. FIG. 2 is a top view showing the stator unit 10 according to the first embodiment with the cover removed. FIG. 3 is a side view of the stator unit 10 of FIG. 2 as viewed in the direction of arrow A in FIG. 1. FIG. 4 is a longitudinal cross-sectional view of an annular intermediate 1 obtained in the manufacturing process of the stator unit 10. FIG. 5 is a side view of the cross section B-B of the configuration shown in FIG. 2. FIG. 6 is an enlarged cross-sectional view of the partition member 30 shown in FIG. 4. FIG. 7 is an enlarged view of part C in FIG. 5. FIG. 8 is an enlarged view of part D in FIG. 1. A stepping motor is formed by the rotor unit inside the can and the stator unit. In this specification, the axial direction of the stator unit is defined as the up-down direction, and the radial direction relative to the axis of the stator unit is defined as the radial direction.

[0012] Stator unit 10 has A-phase yoke 11a, A-phase bobbin 12a, A-phase coil 13a, B-phase yoke 11b, B-phase bobbin 12b, B-phase coil 13b, filled resin portion 14 (shown by dotted lines in FIG. 1), partition member 30, and cover 40. Here, A-phase yoke 11a and B-phase yoke 11b are referred to as yokes, A-phase bobbin 12a and B-phase bobbin 12b are referred to as bobbins, and A-phase coil 13a and B-phase coil 13b are referred to as stator coils.

[0013] The A-phase yoke 11a, the A-phase bobbin 12a, the A-phase coil 13a, the B-phase yoke 11b, the B-phase bobbin 12b, the B-phase coil 13b, the filled resin portion 14, and the partition member 30 are combined with each other to form the intermediate body 1 shown in Figure 4.

[0014] The A-phase yoke 11a has a hollow annular shape with a rectangular radial cross section. The A-phase yoke 11a is made of metal and has a first plate portion 11d, a second plate portion 11e, an outer plate portion 11f, a plurality of first pole teeth 11g, and a plurality of second pole teeth 11h. The first plate portion 11d has an annular shape. The second plate portion 11e also has an annular shape and is arranged parallel to and spaced apart from the first plate portion 11d in the axial direction of the stator unit.

[0015] The outer plate portion 11f has a cylindrical shape. One end of the outer plate portion 11f is connected to the outer peripheral edge of the first plate portion 11d, and the outer plate portion 11f is disposed at a right angle to the first plate portion 11d.

[0016] The first pole teeth 11g are connected to the inner peripheral edge of the first plate portion 11d and are arranged perpendicular to the first plate portion 11d. The first pole teeth 11g are tapered, with their tips pointing toward the second plate portion 11e. The first pole teeth 11g are arranged at equal intervals in the circumferential direction.

[0017] The second pole teeth 11h are connected to the inner peripheral edge of the second plate portion 11e and are arranged perpendicular to the second plate portion 11e. The second pole teeth 11h are tapered, with their tips pointing toward the first plate portion 11d. The second pole teeth 11h are arranged at equal intervals in the circumferential direction.

[0018] The first pole teeth 11g and the second pole teeth 11h are alternately arranged at intervals in the circumferential direction. The first pole teeth 11g and the second pole teeth 11h form the inner circumferential surface of the stator unit 10 (and the intermediate body 1).

[0019] A part having first plate portion 11d, outer plate portion 11f, and first pole tooth 11g and a part having second plate portion 11e and second pole tooth 11h are formed by pressing, and A-phase yoke 11a is obtained by combining these parts. A rectangular notch is cut out from a portion of the periphery of A-phase yoke 11a and B-phase yoke 11b, forming notch edge 11k.

[0020] The A-phase bobbin 12a has a cylindrical shape and is made of resin. The A-phase bobbin 12a has a first flange portion 12c, a second flange portion 12d, and a cylindrical portion 12e. The first flange portion 12c and the second flange portion 12d have an annular flat plate shape and are arranged parallel to the first flange portion 12c with a gap in the axial direction. The cylindrical portion 12e connects the inner peripheral edge of the first flange portion 12c to the inner peripheral edge of the second flange portion 12d. The second flange portion 12d of the A-phase bobbin 12a and the second flange portion 12d of the B-phase bobbin 12b are provided with pin holding portions 12f, 12f, respectively. As shown in FIG. 5, the pin holding portions 12f, 12f each have a concave-convex portion consisting of three convex portions arranged at intervals and each having three pins 21 embedded therein and three concave portions adjacent to the convex portions, and the concave-convex portions are engaged with each other.

[0021] In FIG. 4, an A-phase coil 13a is wound around an A-phase bobbin 12a. The A-phase bobbin 12a and the A-phase coil 13a are disposed in the internal space of the A-phase yoke 11a (the space surrounded by the first plate portion 11d, the second plate portion 11e, the outer plate portion 11f, the first pole tooth 11g, and the second pole tooth 11h). The first flange portion 12c contacts the first plate portion 11d of the A-phase yoke 11a. The second flange portion 12d contacts the second plate portion 11e of the A-phase yoke 11a. The cylindrical portion 12e contacts the multiple first pole teeth 11g and multiple second pole teeth 11h of the A-phase yoke 11a. The A-phase bobbin 12a separates the internal space of the A-phase yoke 11a from the space between the multiple first pole teeth 11g and multiple second pole teeth 11h of the A-phase yoke 11a.

[0022] The B-phase yoke 11b, B-phase bobbin 12b, and B-phase coil 13b are the same as the A-phase yoke 11a, A-phase bobbin 12a, and A-phase coil 13a except that they are arranged oppositely with respect to the axial direction, and therefore the same reference numerals are used for each part and redundant explanations will be omitted. A plurality of (six in this case) power supply pins 21 are implanted in each pin holding portion 12f and extend in the radial direction.

[0023] The A-phase yoke 11a and the B-phase yoke 11b are arranged coaxially. The second plate portion 11e of the A-phase yoke 11a and the second plate portion 11e of the B-phase yoke 11b are in contact with each other. An end of the outer plate portion 11f of the A-phase yoke 11a and an end of the opposing outer plate portion 11f of the B-phase yoke 11b are in contact with each other except for the notched edge 11k. A wire 16 is wound around the A-phase bobbin 12a and the B-phase bobbin 12b to form the A-phase coil 13a and the B-phase coil 13b. The wire 16 drawn from the A-phase coil 13a and the B-phase coil 13b extends radially outward along the second flange portion 12d, and its end W is wrapped around and soldered to the pin 21. The wire 16 other than the soldered portion (SL in FIG. 8) is coated with polyimide resin.

[0024] The filled resin portion 14 is made of urethane resin and covers the intermediate body 1 inside the cover 40 .

[0025] In FIG. 1, the filled resin portion 14 has a seal portion 14a. The seal portion 14a has a roughly cylindrical shape and is disposed to fill the space between the plurality of pole teeth (the plurality of first pole teeth 11g and the plurality of second pole teeth 11h) of the A-phase yoke 11a and the B-phase yoke 11b. The space has a plurality of branched portions that are connected to each other to form a single space. The seal portion 14a fills the space and is seamlessly connected to the plurality of first pole teeth 11g and the plurality of second pole teeth 11h. The seal portion 14a, together with the plurality of first pole teeth 11g and the plurality of second pole teeth 11h, forms the inner periphery of the stator unit 10.

[0026] The partition member 30 is made of, for example, resin, and as shown in FIG. 6 , has an opening 31 that penetrates the stator unit 10 in the radial direction (left-right direction in FIG. 6 ), a first partition portion 32, and a second partition portion 33 that is disposed radially outward of the stator unit 10 from the first partition portion 32. The pins 21 can pass through the opening 31. When the filled resin portion 14 is applied to the intermediate body 1, the filled resin portion 14 covers the wires 16 and pins 21 that extend from the A-phase coil 13 a and the B-phase coil 13 b to the soldered portions SL within the opening 31 of the partition member 30, and also covers the outer periphery of the partition member 30.

[0027] The opening 31 has an inner opening 31s close to the first partition portion 32 and an outer opening 31t close to the second partition portion 33. The outer opening 31t has a substantially rectangular cross section perpendicular to the penetration direction of the opening 31. However, the opening 31 is not limited to the above as long as it has a shape that can form gaps CL1 and CL2, which will be described later. For example, the opening 31 does not have to penetrate in the radial direction, and the outer opening 31t does not have to be substantially rectangular.

[0028] 5 and 7, the inner opening 31s has a central surface 31a and an end surface 31b that face each other vertically, and an inner surface 31e that intersects with the end surface 31b. The distance between the central surfaces 31a that face each other vertically is greater than the distance between the end surfaces 31b that face each other vertically.

[0029] 7, the end surfaces 31b as the contact portions contact the upper and lower surfaces of the second flange portion 12d, but the central surface 31a as the non-contact portion does not contact the upper and lower surfaces of the second flange portion 12d, resulting in a gap (lateral gap) CL1 between the central surface 31a and the second flange portion 12d.

[0030] In the cross section shown in FIG. 8, the central surface 31a of the inner opening 31s has a shape corresponding to the coil-side upper surface (or lower surface) of the second flange portion 12d of the A-phase bobbin 12a (and the B-phase bobbin 12b). Specifically, the central surface 31a has a flat surface 31c extending radially and an arc-shaped surface 31d connected to the flat surface 31c. Therefore, a substantially constant gap CL1 is secured between the coil-side upper surface (or lower surface) of the second flange portion 12d and the flat surface 31c and the arc-shaped surface 31d. The wire 16 is drawn out from the A-phase coil 13a (and the B-phase coil 13b) through a gap (vertical gap) CL2 between the partition member 30 and the A-phase coil 13a (and the B-phase coil 13b) and further extends toward the pin 21 through the gap CL1. The dimensions of the gaps CL1 and CL2 are greater than the wire diameter of the wire 16.

[0031] 6, the vertical dimension of the first partition portion 32 is smaller than the vertical dimension of the second partition portion 33, and therefore a step surface 34 is formed between the first partition portion 32 and the second partition portion 33. The outer periphery of the first partition portion 32 fits into the cutout edges 11k of the A-phase yoke 11a and the B-phase yoke 11b. The step surface 34 that abuts against the outer plate portion 11f is a flat surface parallel to the axis of the stator unit 10, but may have a partially cylindrical surface shape corresponding to the outer peripheral surface of the outer plate portion 11f, thereby enabling it to fit closely to the outer peripheral surface.

[0032] The first partition member 32 has a tapered surface 32a whose vertical dimension decreases toward the coil side, and its tip surface 32b is a flat or partially cylindrical surface. As shown in Fig. 8, the stepped surface 34 abuts against the outer peripheral surfaces of the outer plate portions 11f of the A-phase yoke 11a and the B-phase yoke 11b, thereby positioning the partition member 30 and the A-phase coil 13a and the B-phase coil 13b in the radial direction, thereby creating a specified gap CL2 between the tip surface 32b and the outer peripheral surface of the coil (A-phase coil 13a in Fig. 8). This prevents the tip surface 32b from coming into contact with the coil wire 16, thereby preventing damage to the wire 16.

[0033] 1, the cover 40 is made up of an outer peripheral wall 41, a top wall 42 that closes the top of the outer peripheral wall 41, and a cylindrical recess 43 formed in the top wall 42. An annular portion 44 that protrudes in the axial direction is formed on the edge of the cylindrical recess 43. The annular portion 44 is fitted onto the inner periphery of the first plate portion 11d of the A-phase yoke 11a, thereby positioning the intermediate body 1 and the cover 40.

[0034] The pins 21 are soldered to the circuit of the relay board 22, and a connector 23 is connected to the circuit of the relay board 22. Wiring 24 extending from the connector 23 extends to the outside and is connected to a control device (not shown). When the stator unit 10 of this embodiment is assembled to an electric valve, power is supplied from an external control device to the A-phase coil 13a and the B-phase coil 13b via the wiring 24, relay board 22, and pins 21, generating a magnetic force that drives the rotor unit.

[0035] The filled resin portion 14 covers the pins 21, the relay board 22, the connector 23, and the wiring 24.

[0036] It is preferable to attach a rotation prevention member 25 to the first plate portion 11d of the B-phase yoke 11b by welding. The rotation prevention member 25 is a member that prevents rotation of the stator unit 10 by being fixed to the can side when the stator unit 10 is assembled to the motor-operated valve.

[0037] When forming the stator unit 10 of this embodiment, the cover 40 is turned upside down relative to the state shown in FIG. 1 . Furthermore, with the relay board 22, connector 23, and wiring 24 attached to the pins 21 of the intermediate body 1, the cover 40 is brought closer from above, and the inner periphery of the first plate portion 11d is fitted into the outer periphery of the annular portion 44. This connects the inner periphery of the intermediate body 1 and the inner periphery of the cylindrical recess 43 without any steps. Then, a cylindrical core (not shown) is brought closer from above the cover 40, and fitted into the inner periphery of the intermediate body 1 and the inner periphery of the cylindrical recess 43. At this time, the inner periphery of the cylindrical recess 43 is in close contact with the outer periphery of the core over the entire circumference, preventing the urethane resin from penetrating inside the cylindrical recess 43.

[0038] From this state, molten urethane resin is poured into the cover 40 until the liquid level exceeds the welded portion of the anti-rotation member 25. When a vacuum is drawn, the urethane resin enters between the first pole teeth 11g and the second pole teeth 11h, conforming to the outer peripheral surface of the core to form the seal portion 14a, and also enters the opening 31 of the partition member 30, filling the area around the wire 16. The urethane resin is then heated, causing it to harden and form the filled resin portion 14. After the urethane resin has hardened, it is integrated with the cover 40 to complete the stator unit 10.

[0039] Fig. 9 is a cross-sectional view of a comparative example similar to Fig. 8. The comparative example is similar to the above embodiment except that it does not have a partition member, so the same reference numerals are used and redundant description will be omitted.

[0040] In the comparative example shown in FIG. 9 , because no partition member is provided, wire 16 drawn from A-phase coil 13 a (and B-phase coil 13 b) contacts filled resin portion 14, which is made of urethane resin, all the way up to portion SL where pin 21 is soldered. Because urethane resin has the property of easily adhering to the polyimide of wire 16, when the ambient temperature of an electric valve incorporating the stator unit of the comparative example changes and filled resin portion 14 shrinks relatively significantly, an external force is applied to wire 16 in the normal direction of second flange portion 12 d, which is in close contact with filled resin portion 14. Specifically, external force F1′ is applied to wire 16 in a direction away from the flat portion of second flange portion 12 d, and external force F2′ is applied to wire 16 in a direction away from the arc-shaped portion of second flange portion 12 d. When the shrinkage rate of filled resin portion 14 is high, external forces F1′ and F2′ become large, resulting in a relatively large load on wire 16. In particular, the curved portion of the wire 16 is likely to be subjected to excessive tension when the external force F2' is applied.

[0041] In contrast, according to this embodiment, as shown in FIG. 8 , the filled resin portion 14 covers the wire 16 extending from the A-phase coil 13a and the B-phase coil 13b to the soldered portion SL within the opening 31 of the partition member 30. Therefore, even if the ambient temperature of the motor-operated valve to which the stator unit 10 is assembled changes and the filled resin portion 14 shrinks relatively significantly, the amount of shrinkage is also small because the volume of the urethane resin within the opening 31 is small. Therefore, the external force F1 applied to the wire 16 in a direction away from the flat portion of the second flange portion 12d is smaller than the external force F1' applied to the same portion in the comparative example, and the external force F2 applied to the same portion in a direction away from the arc-shaped portion of the second flange portion 12d is smaller than the external force F2' applied to the same portion in the comparative example. This has the advantage of reducing the load on the wire 16.

[0042] Furthermore, the filled resin portion 14 entirely covers the A-phase yoke 11a, the A-phase bobbin 12a, the A-phase coil 13a, the B-phase yoke 11b, the B-phase bobbin 12b, and the B-phase coil 13b, thereby providing a waterproof function.

[0043] (Second embodiment) Fig. 10 is a longitudinal cross-sectional view showing a stator unit 10A according to a second embodiment. Fig. 11 is a longitudinal cross-sectional view of an annular intermediate 1A obtained in the manufacturing process of the stator unit 10A. Fig. 12 is a cross-sectional view showing an enlarged view of the periphery of the partition member in Fig. 10. Fig. 13 is a side view of the intermediate 1A as viewed in the direction of arrow E in Fig. 11, but wires are not shown.

[0044] In this embodiment, the configuration of the partition member 30A is different from that of the first embodiment, but the other configurations are the same as those of the first embodiment, so the same reference numerals are used and redundant explanations will be omitted.

[0045] 12, the partition member 30A has an opening 31A through which the pin 21 passes in the radial direction of the stator unit 10A, a first partition portion 32, and a second partition portion 33A disposed radially outward from the first partition portion 32. The first partition portion 32 has the same shape as in the first embodiment, and therefore a repeated description will be omitted.

[0046] The opening 31A has an inner opening 31s and an outer opening 31At. The inner opening 31s has the same shape as in the first embodiment and has the same relationship as the second flange portion 12d, so a duplicated description will be omitted.

[0047] The outer opening 31At has a tapered opening 31Ac that approaches the pin 21 as it moves radially outward of the stator unit 10A, and a parallel portion 31Ad that is connected to the tapered opening 31Ac and is parallel to the pin 21.

[0048] The second partition portion 33A has a tapered surface portion 33Aa that approaches the parallel portion 31Ad toward the outside in the radial direction of the stator unit 10A, and an outer end surface 33Ab.

[0049] According to this embodiment, the outer end surface 33Ab of the second partition portion 33A abuts against the surface of the relay board 22, making it easier to position the relay board 22 relative to the partition member 30A and improving workability when soldering the pin 21 to the circuit of the relay board 22.

[0050] Furthermore, because opening 31A has parallel portion 31Ad with a smaller cross-sectional area radially outward of tapered opening 31Ac, the amount of urethane resin that enters opening 31A from parallel portion 31Ad can be limited during filling. Therefore, even if thermal shrinkage occurs after the urethane resin hardens, the load applied to wire 16 can be reduced.

[0051] It should be noted that the present invention is not limited to the above-described embodiments. Any of the components of the above-described embodiments may be modified within the scope of the present invention. Furthermore, any of the components of the above-described embodiments may be added or omitted.

[0052] This specification includes the disclosure of the following inventions. (First aspect) York and A stator coil; a filled resin portion made of a resin material; a partition member having an opening into which a portion of the yoke is inserted, a wire extending from the stator coil passes through an opening in the partition member, and one end of the wire is soldered to a power supply pin; The filled resin portion covers the wires extending from the stator coil to the soldered portions within the opening and the partition member. A stator unit characterized by:

[0053] (Second aspect) The partition member abuts against the outer peripheral surface of the yoke, and is positioned in the radial direction of the stator unit, thereby forming a vertical gap between the partition member and the stator coil that is larger than the wire diameter of the wire, and the wire passes through the vertical gap. 10. The stator unit of claim 1, wherein:

[0054] (Third aspect) the opening of the partition member has a contact portion that contacts the yoke and a non-contact portion that is adjacent to the contact portion and does not contact the yoke, a lateral gap larger than a diameter of the wire is formed between the yoke and the non-contact portion, and the wire passes through the lateral gap; The stator unit according to the first or second aspect, characterized in that:

[0055] (Fourth aspect) One end of the partition member abuts against the relay board to which the pin is attached. The stator unit according to any one of the first to third aspects, characterized in that:

[0056] (Fifth aspect) A stator unit according to any one of the first to fourth aspects is included. A motor-operated valve characterized by: [Explanation of symbols]

[0057] 10, 10A stator unit 11a A phase yoke 11b B phase yoke 12a A phase bobbin 12b B phase bobbin 13a A-phase coil 13b B-phase coil 14 Filling resin section 16 wires 30, 30A Partition material 40 Cover

Claims

1. York and A stator coil; a filled resin portion made of a resin material; a partition member having an opening into which a portion of the yoke is inserted, a wire extending from the stator coil passes through an opening in the partition member, and one end of the wire is soldered to a power supply pin; The filled resin portion covers the wires extending from the stator coil to the soldered portions within the opening and the partition member. A stator unit characterized by:

2. The partition member abuts against the outer peripheral surface of the yoke, and is positioned in the radial direction of the stator unit, thereby forming a vertical gap between the partition member and the stator coil that is larger than the wire diameter of the wire, and the wire passes through the vertical gap.

2. The stator unit according to claim 1.

3. the opening of the partition member has a contact portion that contacts the yoke and a non-contact portion that is adjacent to the contact portion and does not contact the yoke, a lateral gap larger than a diameter of the wire is formed between the yoke and the non-contact portion, and the wire passes through the lateral gap; 2. The stator unit according to claim 1.

4. One end of the partition member abuts against the relay board to which the pin is attached.

2. The stator unit according to claim 1.

5. A stator unit according to any one of claims 1 to 4, A motor-operated valve characterized by:

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