Solenoid

Abstract

This solenoid comprises: a first member having a lid part that holds a coil housed in a case being a cylindrical member and having an end on a first side in the center line direction fixed to an outer cylinder, and that covers an opening of the case, a connector part for energizing the coil, and a joining part that joins the lid part and the connector part; a second member that is cylindrical, is disposed around the case, and forms a gap in the center line direction between the first member and the second member; and a seal member that is provided in the gap. The second member has a recess that is recessed from the outer surface, and a plurality of protrusions that are provided on both sides of the recess and that protrude from the outer surface. The first member has a protrusion that protrudes in the center line direction from the joining part and is disposed in the recess between the plurality of protrusions.

Description

Solenoid

[0001] The present invention relates to a solenoid.

[0002] For example, the damping force adjustable shock absorber described in Patent Document 1 includes a cylinder in which a working fluid is enclosed, a piston inserted into the cylinder and partitioning the inside of the cylinder into a rod side chamber and a bottom side chamber, a piston rod connected to the piston and extending to the outside of the cylinder, a flow path through which the flow of the working fluid is generated by the expansion and contraction of the piston rod, and a damping force adjustment valve provided in the flow path and whose opening and closing operation is adjusted by a solenoid. The damping force adjustment valve constitutes an electromagnetic damping force adjustment device together with the solenoid. And in the solenoid, a technique for suppressing the intrusion of external foreign matters from the gap between the exterior body and the housing has been proposed. For example, the solenoid described in Patent Document 2 has an upper end opening, and includes a housing that houses a solenoid body in which a coil is wound around a bobbin from the upper end opening, a molded resin that covers the solenoid body, a primary exterior body that is attached to the upper end opening of the housing and forms a gap therebetween, and a secondary exterior body made of a molded resin that covers the primary exterior body so as to close the gap.

[0003] Japanese Patent Application Laid-Open No. 2017-211062, Patent No. 6852051

[0004] In the solenoid described in Patent Document 2, since it is composed of two parts, the primary exterior body and the secondary exterior body, there is room for improvement in terms of cost reduction. The present invention aims to provide a solenoid that can achieve cost reduction.

[0005] The present invention, completed with this objective in mind, is a solenoid comprising: a first member having a lid portion that holds a coil housed in a case, the first end of which in the direction of the centerline is fixed to an outer cylinder, and covers the opening of the case; a connector portion for supplying current to the coil; and a connecting portion that connects the lid portion and the connector portion; a second member having a cylindrical shape, which is arranged around the case and forms a gap in the direction of the centerline between itself and the first member; and a sealing member provided in the gap, wherein the second member has a recess that is indented from its outer surface and a plurality of protrusions provided on both sides of the recess that protrude from the outer surface, and the first member has a projection that protrudes from the connecting portion in the direction of the centerline and is positioned in the recess between the plurality of protrusions.

[0006] According to the present invention, it is possible to provide a solenoid that can be made more cost-effective.

[0007] This figure shows an example of the schematic configuration of the suspension device according to the first embodiment. This figure shows an example of a cross-section of the electromagnetic damping force adjustment device. This is a perspective view showing an example of the appearance of the electromagnetic damping force adjustment device. This figure shows an example of the appearance of the electromagnetic damping force adjustment device as seen from direction IV in Figure 3. This is a perspective view showing an example of the appearance of the overmolding. This is a perspective view showing an example of the appearance of the exterior member. This figure shows an example of a cross-section of section VII-VII in Figure 4. This figure shows an example of a cross-section of section VIII-VIII in Figure 4. This is a perspective view showing an example of the appearance of the exterior member of the damping force adjustment device according to the second embodiment. This figure shows an example of a cross-section of the damping force adjustment device according to the second embodiment.

[0008] Embodiments of the present invention will be described in detail below with reference to the attached drawings. <First Embodiment> Figure 1 is a diagram showing an example of a schematic configuration of a suspension device 1 according to the first embodiment. The suspension device 1 is a suspension used in vehicles such as passenger cars, and as shown in Figure 1, comprises a hydraulic shock absorber 2 and a coil spring 3 arranged outside the shock absorber 2. The suspension device 1 also comprises a lower spring seat 4 that supports one end of the rod 12 in the axial direction (the lower side in Figure 1) of the coil spring 3, which will be described later. The suspension device 1 also comprises an upper spring seat 5 that supports the other end of the rod 12 in the axial direction (the upper side in Figure 1) of the coil spring 3.

[0009] Furthermore, the suspension device 1 includes a vehicle-side bracket 6 for attaching the suspension device 1 to the vehicle, a wheel-side bracket 7 for attaching the suspension device 1 to the wheel, and a dust cover 8 that covers at least a part of the cylinder portion 10 and the rod 12.Hereinafter, the axial direction of the rod 12 may be simply referred to as the "axial direction."Also, one side in the axial direction (the lower side in Figure 1) and the other side in the axial direction (the upper side in Figure 1) may be simply referred to as the "one side" and the "other side," respectively.In addition, the direction intersecting the axial direction (for example, the orthogonal direction) may be referred to as the "radial direction."In the radial direction, the side of the cylinder 101 that is on the centerline may be simply referred to as the "inside," and the side that is away from the centerline may be simply referred to as the "outside."

[0010] The damping device 2 comprises a cylinder portion 10 that contains oil as an example of a working fluid, and a rod 12 whose other end protrudes from the cylinder portion 10 and whose one end is slidably inserted into the cylinder portion 10. The damping device 2 also comprises a piston portion 13 provided at one end of the rod 12 and a bottom portion 14 provided at one end of the cylinder portion 10. Furthermore, the damping device 2 includes an electromagnetic damping force adjustment device 17 provided outside the cylinder portion 10 that generates damping force and allows adjustment of the damping force.

[0011] The cylinder section 10 includes a cylinder 101 for containing oil, an intermediate cylinder 102 provided on the outside of the cylinder 101, and an outer cylinder 103 provided on the outside of the cylinder 101 and further outside of the intermediate cylinder 102. The cylinder section 10 also includes a rod guide section 104 for movably supporting the rod 12, a bump stopper cap 105, and an oil seal 106 to prevent foreign matter from entering the cylinder section 10.

[0012] The cylinder 101 is formed in a cylindrical shape, and a communication hole 101H is formed at the other end, connecting the inside and outside. The intermediate cylinder 102 is also formed in a cylindrical shape. The intermediate cylinder 102 forms a communication passage L between itself and the cylinder 101. The intermediate cylinder 102 also has an intermediate cylinder opening 102H at a position opposite the electromagnetic damping force adjustment device 17. A cylindrical holder 20 (see Figure 2), which will be described later, of the electromagnetic damping force adjustment device 17 is fitted into the intermediate cylinder opening 102H.

[0013] The outer cylinder 103 is formed in a cylindrical shape. The outer cylinder 103 forms a reservoir chamber R between itself and the intermediate cylinder 102 where oil accumulates. The reservoir chamber R absorbs oil from the cylinder 101 and supplies oil to the cylinder 101 as the rod 12 moves relative to the cylinder 101. The reservoir chamber R also collects oil that flows out from the electromagnetic damping force adjustment device 17. The outer cylinder 103 also has a case opening 103H at a position opposite the electromagnetic damping force adjustment device 17.

[0014] The rod 12 is a rod-shaped member that extends long in the axial direction. The rod 12 holds the piston portion 13 on one end. The rod 12 is connected to, for example, the vehicle body on the other end via a connecting member or the like (not shown).

[0015] The piston section 13 includes a piston body 131 having a plurality of piston oil passages, a piston valve 132 that opens and closes the other side of the piston oil passages, and a spring 133 provided between the piston valve 132 and one end of the rod 12. The piston section 13 divides the oil in the cylinder 101 into a first oil chamber Y1 and a second oil chamber Y2.

[0016] The bottom portion 14 includes a valve seat 141, a check valve portion 143 provided on the other side of the valve seat 141, and a fixing member 144 provided in the axial direction. The bottom portion 14 separates the first oil chamber Y1 from the reservoir chamber R.

[0017] [Electromagnetic Damping Force Adjustment Device 17] Figure 2 is a diagram showing an example of a cross-section of the electromagnetic damping force adjustment device 17. Figure 3 is a perspective view showing an example of the external appearance of the electromagnetic damping force adjustment device 17. Figure 4 is a diagram showing an example of the external appearance of the electromagnetic damping force adjustment device 17 as seen from direction IV in Figure 3. Figure 5 is a perspective view showing an example of the external appearance of the overmolding 70. Figure 6 is a perspective view showing an example of the external appearance of the exterior member 50. Figure 7 is a diagram showing an example of a cross-section of section VII-VII in Figure 4. Figure 8 is a diagram showing an example of a cross-section of section VIII-VIII in Figure 4. The electromagnetic damping force adjustment device 17 differs from the electromagnetic damping force adjustment device described in Patent Document 1 in that the valve case 19, cylindrical case 34, exterior member 50, and overmolding 70 are different. Hereinafter, the same reference numerals will be used for the same parts in the electromagnetic damping force adjustment device 17 and the electromagnetic damping force adjustment device described in Patent Document 1, and their detailed explanations will be omitted. Hereinafter, the electromagnetic damping force adjustment device 17 may be referred to simply as the damping force adjustment device 17.

[0018] The damping force adjustment device 17 includes a damping force adjustment valve 18 that generates damping force, and a solenoid 33 that adjusts the damping force generated by the damping force adjustment valve 18. The damping force adjustment device 17 also includes an exterior member 50 that covers a portion of the outer circumferential surface of the valve case 19 and cylindrical case 34 of the damping force adjustment valve 18, which will be described later.

[0019] (Damping force adjustment valve 18) The damping force adjustment valve 18 comprises a valve case 19, a cylindrical holder 20, a valve member 21, and a main disc valve 23. The damping force adjustment valve 18 also comprises a pilot pin 24, a pilot body 26, a return spring 28, a disc valve 29, a retaining plate 30, a pilot cap 31, and a valve body 32.

[0020] The valve case 19 is a substantially cylindrical member and is fixed to the outer cylinder 103, for example, by welding. In the following description, the direction of the centerline of the valve case 19 (i.e., the direction that intersects the axial direction of the cylinder portion 10 (see Figure 1)) may be referred to as the "second axial direction." In the second axial direction, the side of the cylinder portion 10 that is on the central axis (left side in Figure 2) may be referred to as the "first side," and the side that is away from the central axis of the cylinder portion 10 (right side in Figure 2) may be referred to as the "second side." In addition, the direction that intersects the centerline of the valve case 19 (for example, the orthogonal direction) may be referred to as the "second radial direction." And in the second radial direction, the side of the valve case 19 that is on the centerline may be referred to as the "second inner side," and the side that is away from the centerline of the valve case 19 may be referred to as the "second outer side."

[0021] The valve case 19 has an inner flange portion 19A that protrudes second inward from the first end. The inner circumferential surface of the valve case 19 has a female thread 19E into which the male thread 34E of the cylindrical case 34 (described later) is tightened. The diameter of the inner circumferential surface of the valve case 19 second to the female thread 19E is larger than the diameter of the inner circumferential surface first to the female thread 19E. The valve case 19 has a recess 19G that is recessed second inward from the outer circumferential surface. The recess 19G is formed around the entire circumference, and a seal ring 19H that seals the gap between the valve case 19G and the exterior member 50 is fitted into the recess 19G. In addition, the valve case 19 has a recess 19J that is recessed from the outer circumferential surface on a part of the circumferential direction second to the recess 19G. The protrusion 67 of the exterior member 50 (described later) is fitted into the recess 19J. The valve case 19 is fixed to the outer cylinder 103, for example by welding, with its inner flange portion 19A in contact with the outer circumferential surface of the outer cylinder 103. An annular oil chamber 19C leading to the reservoir chamber R is formed between the inner circumferential surface of the valve case 19 and the outer circumferential surfaces of the valve member 21, pilot body 26, etc.

[0022] The second inner side of the cylindrical holder 20 has a first side in the second axial direction that connects to the communication passage L, and an oil passage 20B that extends to the position of the valve member 21 on the second side. An annular spacer 22 is sandwiched between the flange portion 20A of the cylindrical holder 20 and the inner flange portion 19A of the valve case 19. The spacer 22 has a notch 22A that allows oil to flow between the oil chamber 19C and the reservoir chamber R.

[0023] The valve member 21 has a central hole 21A located at the center in the second radial direction and extending in the second axial direction. The valve member 21 also has a plurality of oil passages 21B (only one is shown) formed around the central hole 21A. The valve member 21 also has an annular recess 21C surrounding the second opening of the oil passage 21B. The valve member 21 also has an annular valve seat 21D located second outside the annular recess 21C on which the main disc valve 23 is seated.

[0024] The main disc valve 23 has its second inner side sandwiched between the valve member 21 and the large-diameter portion 24A of the pilot pin 24 (described later), and its second outer side seated on the annular valve seat 21D of the valve member 21. An elastic sealing member 23A is fixed to the outer circumference of the second side of the main disc valve 23. The main disc valve 23 opens by moving away from the annular valve seat 21D in response to the pressure on the oil passage 21B side of the valve member 21, allowing the oil passage 21B of the valve member 21 to pass to the oil chamber 19C (in other words, the reservoir chamber R side). The opening pressure of the main disc valve 23 changes according to the pressure in the pilot chamber 27 (described later).

[0025] The pilot pin 24 has a large-diameter portion 24A in the center in the second axial direction. The pilot pin 24 also has a stepped central hole 24B located in the center in the second radial direction and extending in the second axial direction, and an orifice 24C is formed at the first end of the central hole 24B. The first end of the pilot pin 24 is press-fitted into the central hole 21A of the valve member 21, and the main disc valve 23 is sandwiched between the large-diameter portion 24A and the valve member 21. The second end of the pilot pin 24 is fitted into the central hole 26C of the pilot body 26, which will be described later. An oil passage 25 extending in the second axial direction is formed between the central hole 26C of the pilot body 26 and the second portion of the pilot pin 24. The oil passage 25 leads the central hole 26C to the pilot chamber 27, which will be described later.

[0026] The pilot body 26 has a cylindrical portion 26A with a stepped hole formed on its second inner side, and a bottom portion 26B that closes the cylindrical portion 26A. A central hole 26C is formed on the second inner side of the bottom portion 26B into which the second end of the pilot pin 24 is fitted. On the first side of the bottom portion 26B of the pilot body 26, there is a protruding cylindrical portion 26D located on the second outer side and projecting towards the valve member 21 along its entire circumference. The elastic sealing member 23A of the main disc valve 23 fits liquid-tightly to the inner circumferential surface of this protruding cylindrical portion 26D, forming a pilot chamber 27 between the main disc valve 23 and the pilot body 26. The pressure in the pilot chamber 27 acts on the main disc valve 23 in the direction of closing the valve.

[0027] On the second side of the bottom 26B of the pilot body 26, a valve seat portion 26E is provided so as to surround the central hole 26C, on which the valve body 32, described later, is seated. On the second outer side of this valve seat portion 26E, an oil passage 26F is provided that penetrates the bottom 26B in the second axial direction. This oil passage 26F allows oil to escape to the valve body 32 side via the flexible disc 26G when the pressure in the pilot chamber 27 rises excessively due to the opening operation of the main disc valve 23.

[0028] A return spring 28 is provided on the second inner side of the cylindrical portion 26A of the pilot body 26, which biases the valve body 32 away from the valve seat portion 26E of the pilot body 26. Also provided on the second inner side of the cylindrical portion 26A are a disc valve 29 which constitutes a fail-safe valve when the solenoid 33 is not energized, and a retaining plate 30 with an oil passage 30A formed on its second inner side. The return spring 28, disc valve 29, retaining plate 30, etc. are fixed by a pilot cap 31 fitted to the open end side of the cylindrical portion 26A. The pilot cap 31 has multiple (for example, four) notches 31A formed in the circumferential direction to allow oil that has flowed to the solenoid 33 side through the oil passage 30A of the retaining plate 30 to flow into the oil chamber 19C.

[0029] The valve body 32 is provided at the first end of the shaft portion 43 of the solenoid 33, which will be described later. The valve body 32 is formed in a substantially cylindrical shape, and the tip that seats on the valve seat portion 26E of the pilot body 26 is tapered. The shaft portion 43 is fitted inside the valve body 32, and the opening degree of the valve body 32 is adjusted in response to the energization of the solenoid 33. A flange portion 32A, which serves as a spring seat, is formed around the entire circumference of the second side portion of the valve body 32. The flange portion 32A contacts the disc valve 29 when the solenoid 33 is not energized, thereby forming a fail-safe valve.

[0030] (Solenoid 33) The solenoid 33 comprises a cylindrical case 34, a bobbin 36, a coil 37, a movable core 38, a fixed core 39, an overmolding 70, a shaft portion 43, a first bush 44, a second bush 45, a back pressure chamber forming member 46, and a cap member 48.

[0031] The cylindrical case 34 is a cylindrical member provided on the second outer side of the solenoid 33, with its axis centered on, for example, the axis of the shaft portion 43. The cylindrical case 34 houses the pilot body 26, coil 37, cap member 48, etc., on its second inner side. The cylindrical case 34 has a valve-side cylindrical portion 34A located on the second outer side of the damping force adjustment valve 18, and a coil-side cylindrical portion 34B located on the second outer side of the cylindrical portion 71 of the overmolded 70, which will be described later. The cylindrical case 34 also has an annular flange portion 34C provided between the valve-side cylindrical portion 34A and the coil-side cylindrical portion 34B. The cylindrical case 34 is molded from a magnetic material and forms a magnetic path when energized.

[0032] A pilot cap 31 of the damping force adjustment valve 18 is fitted into the second inner side of the valve-side cylindrical portion 34A, and the valve case 19 of the damping force adjustment valve 18 is positioned on the second outer side of the valve-side cylindrical portion 34A. A male thread 34E is formed at the first end of the valve-side cylindrical portion 34A, and the male thread 34E is fastened to the female thread 19E of the valve case 19. A seal groove 34A1 is provided around the entire circumference of the outer circumferential surface of the valve-side cylindrical portion 34A. A seal ring 34A2 is fitted into the seal groove 34A1, and the seal ring 34A2 provides a liquid-tight seal between the cylindrical case 34 and the valve case 19.

[0033] A cylindrical portion 71 of the overmolding 70, described later, is inserted into the second inner side of the coil-side cylindrical portion 34B. The coil-side cylindrical portion 34B has an inclined surface 34K formed at the second end, where the inner diameter gradually increases towards the second side. In addition, the coil-side cylindrical portion 34B has a recess 34F formed around its entire circumference, recessed from the inner circumferential surface to the second outer side, at the first side of the inclined surface 34K. The position of the overmolding 70 relative to the cylindrical case 34 is determined by fitting a metal ring 34B2 into the annular space 81 formed between the recess 34F and the first recess 713 of the overmolding 70, described later.

[0034] A tapered surface 34C1 is formed at the first end of the second inner side of the flange portion 34C. A cap member 48 is fitted into the second inner side of the flange portion 34C. A seal ring 34C2 is provided between the tapered surface 34C1 of the flange portion 34C and the cap member 48.

[0035] The bobbin 36 is provided on the second outer side of the cap member 48. The bobbin 36 is molded from a resin material such as a thermosetting resin and covers the second inner side of the coil 37. The bobbin 36 is formed in a stepped cylindrical shape. The bobbin 36 has a bobbin body 36A that covers the inner circumferential surface and both end faces in the second axial direction of the coil 37, and a stepped cylindrical portion 36B that extends from the bobbin body 36A to the second side. The inner circumferential surface of the stepped cylindrical portion 36B is an insertion hole 36B1 into which the small diameter portion 48C of the cap member 48, which will be described later, is inserted. An insert core 40, which will be described later, is embedded in the second inner side of the bobbin 36.

[0036] The coil 37 is provided between the coil-side cylindrical portion 34B of the cylindrical case 34 and the bobbin body 36A of the bobbin 36. The coil 37 is wound around the bobbin body 36A of the bobbin 36. The coil 37 generates a magnetic force when power is supplied (energized) through the connector portion 73, which will be described later.

[0037] The movable core 38 is positioned inside the second cap member 48 and is integrally fixed to the shaft portion 43, thereby enabling movement in the second axial direction. The movable core 38 is formed into a cylindrical shape from, for example, an iron-based magnetic material. The movable core 38 moves in the second axial direction by being attracted to the fixed core 39 when the coil 37 generates a magnetic force.

[0038] The fixed core 39 is provided on the second inner side of the cap member 48, more specifically, on the second inner side of the cylindrical case 34 and the bobbin 36. The fixed core 39 has a cylindrical portion 39A through which the shaft portion 43 passes, and a flange portion 39B that protrudes second outward from the first end of the cylindrical portion 39A. The fixed core 39 attracts the movable core 38 to the first side when the coil 37 generates a magnetic force. The second end of the cylindrical portion 39A is provided with a recess 39C into which the movable core 38 enters when it is attracted. A first bush 44 that supports the shaft portion 43 is fitted into the second inner side of the fixed core 39.

[0039] The insert core 40 is embedded in the bobbin 36 so as to be located in the second inner portion. The insert core 40 is molded using a magnetic material and has a cylindrical portion 40A through which the movable core 38 passes, and a flange portion 40B that protrudes in the second radial direction from the second end of the cylindrical portion 40A so as to face the second end face of the coil 37. The second inner portion of the cylindrical portion 40A facing the movable core 38 is not covered by the bobbin 36, so the cylindrical portion 40A can transfer magnetic flux to and from the movable core 38. Multiple notches 40C are formed circumferentially on the second outer side of the flange portion 40B, for example, to connect the conductors of the coil 37 to the connector portion 73 of the overmolded 70, which will be described later.

[0040] The overmolded 70 is formed as a bottomed cylindrical shape using, for example, a thermosetting resin. The overmolded 70 has a cylindrical portion 71 that covers the second outside of the coil 37 and a lid portion 72 that closes the second side of the cylindrical portion 71. The overmolded 70 also has a connector portion 73 for supplying current to the coil 37 and a connecting portion 74 that connects the lid portion 72 and the connector portion 73. The overmolded 70 is formed by insert molding, in which resin heated to a softening temperature is filled into the mold in the areas corresponding to the cylindrical portion 71, the lid portion 72, the connector portion 73, and the connecting portion 74, while the bobbin 36 and the coil 37 are held in the mold. Therefore, the overmolded 70 is formed from mold resin.

[0041] The cylindrical portion 71 has a first outer peripheral surface 711 and a second outer peripheral surface 712 with a larger diameter than the first outer peripheral surface 711. The second outer peripheral surface 712 is provided at the second end of the cylindrical portion 71. The cylindrical portion 71 has a first recess 713 formed around its entire circumference, which is recessed inward from the first outer peripheral surface 711, second to the flange portion 40B of the insert core 40. The first recess 713, together with the recess 34F of the cylindrical case 34, forms a space 81 into which the metal ring 34B2 is fitted.

[0042] Furthermore, the cylindrical portion 71 has a second recess 714 formed along its entire circumference, which is recessed inward from the first outer peripheral surface 711, on the second side of the first recess 713. The second recess 714, together with the inclined surface 34K of the coil-side cylindrical portion 34B of the cylindrical case 34, forms a space 82 into which the seal ring 70J is fitted. The second recess 714 has an inclined surface 715 that extends outward in a direction inclined in the second axial direction from the second innermost part of the second recess 714. The second outer peripheral surface 712 is provided on the second side of the second recess 714.

[0043] The lid portion 72 is provided second to the cylindrical portion 71 and is a disc-shaped portion with a diameter larger than the diameter of the second outer circumferential surface 712 of the cylindrical portion 71. The lid portion 72 has a first orthogonal surface 721 perpendicular to the second axial direction, second to the second outer circumferential surface 712 of the cylindrical portion 71. The lid portion 72 also has a first parallel surface 723 parallel to the second axial direction, second to the first orthogonal surface 721. The diameter of the first parallel surface 723 can be exemplified as being less than or equal to the diameter of the inner circumferential surface 51 of the exterior member 50. The lid portion 72 also has a second orthogonal surface 722 perpendicular to the second axial direction, second to the first parallel surface 723. The lid portion 72 also has a second parallel surface 724 parallel to the second axial direction, second to the second orthogonal surface 722. For example, the diameter of the second parallel surface 724 can be said to be greater than or equal to the diameter of the inner circumferential surface 51 of the exterior member 50 (described later) and less than or equal to the diameter of the outer circumferential surface 52 (described later).

[0044] The connecting portion 74 protrudes secondarily outward from the outer peripheral portion of the lid portion 72. The connector portion 73 protrudes firstarily from the end portion on the secondarily outer side of the connecting portion 74. The connecting portion 74 holds inside it a conducting wire (not shown) that connects the coil 37 and the connector portion 73. The connecting portion 74 has a rectangular parallelepiped shape in which the size in the direction orthogonal to the second radial direction and the second axial direction (hereinafter sometimes referred to as the "width direction") is larger than the size in the second axial direction. The end face on the second side of the connecting portion 74 is a flat surface continuous with the end face on the second side of the lid portion 72, and the end face 740 on the first side of the connecting portion 74 is a flat surface continuous with the first orthogonal surface 721 of the lid portion 72.

[0045] The connecting portion 74 has a first protruding portion 741 protruding firstarily from the end face 740 on the first side. The first protruding portion 741 has a rectangular parallelepiped shape and, when viewed in the second axial direction, is a rectangle in which the width direction is the longitudinal direction and the second radial direction is the short side direction. The position in the second axial direction at the tip of the first protruding portion 741 is on the first side relative to the position in the second axial direction in the second recess 714. Also, the connecting portion 74 has second protruding portions 742 protruding firstarily from the end face 740 on the first side beside both end faces in the width direction of the first protruding portion 741. The second protruding portions 742 have a rectangular parallelepiped shape, and the surface on the connector portion 73 side of the second protruding portions 742 is a flat surface continuous with the surface on the connector portion 73 side of the first protruding portion 741. Further, the end face in the width direction of the second protruding portions 742 is a flat surface continuous with the side surface 745 which is the end face in the width direction of the connecting portion 74. And a part of the surface of the second protruding portions 742 on the lid portion 72 side (in other words, the side opposite to the connector portion 73) is an inclined surface 743 that gradually goes toward the connector portion 73 side as going from the second side to the first side. In other words, the second protruding portions 742 gradually become thinner as going from the second side to the first side while the size in the width direction remains constant.

[0046] The shaft portion 43 is a cylindrical member and is located inside the movable iron core 38, the fixed iron core 39, and the second inside of the back pressure chamber forming member 46. The end portion on the first side in the second axial direction of the shaft portion 43 is supported by the first bush 44, and the end portion on the second side of the shaft portion 43 is supported by the second bush 45. The movable iron core 38 is fixed, for example, by press fitting to the central portion in the second axial direction of the shaft portion 43, and the valve body 32 of the damping force adjustment valve 18 is fixed to the end portion on the first side of the shaft portion 43. Therefore, the valve body 32 moves integrally with the movable iron core 38 and the shaft portion 43. In other words, the valve opening degree or the valve opening pressure of the valve body 32 corresponds to the thrust of the movable iron core 38 based on the energization to the coil 37. [[ID=T1]] [[ID=T2]]

[0047] The back pressure chamber forming member 46 is fitted inside the second inside of the end portion on the second side of the cap member 48. The back pressure chamber forming member 46 is formed of a non-magnetic material and has a bottom portion 46A and a cylindrical portion 46B. Inside the second inside of the back pressure chamber forming member 46, the second bush 45 that supports the shaft portion 43 is fitted. The back pressure chamber forming member 46 forms a back pressure chamber 47 into which hydraulic fluid flows.

[0048] The cap member 48 is provided inside the second inside of the bobbin 36. Further, the cap member 48 is provided so as to surround the movable iron core 38, the fixed iron core 39, the back pressure chamber forming member 46, etc. The cap member 48 is formed into a bottomed stepped cylindrical shape by a thin plate of a non-magnetic material. The cap member 48 is provided at the end portion on the first side in the second axial direction and has a large diameter portion 48A disposed outside the second outside of the cylindrical portion 40A so as to face the cylindrical portion 40A of the fixed iron core 39 in the second radial direction. Further, the cap member 48 has a middle diameter portion 48B provided outside the second outside of the movable iron core 38 so as to face the movable iron core 38 in the second radial direction on the second side of the large diameter portion 48A, and a small diameter portion 48C provided on the second side of the middle diameter portion 48B into which the back pressure chamber forming member 46 is press-fitted.

[0049] (Exterior Member 50) The exterior member 50 is a cylindrical member that covers the outer circumferential surface of the second end of the valve case 19 of the damping force adjustment valve 18 and the outer circumferential surface of the cylindrical case 34 of the solenoid 33, which is the outer circumferential surface on the second side of the valve case 19. The exterior member 50 is mounted on the valve case 19 and the cylindrical case 34 such that its center line CL coincides with the axis of the shaft portion 43. The exterior member 50 can be exemplified as being molded from resin. The diameter of the inner circumferential surface 51 of the exterior member 50 (in other words, the inner diameter) is greater than or equal to the outer diameter of the valve case 19. When the seal ring 19H is fitted into the recess 19G of the valve case 19, it contacts the surface forming the recess 19G and the inner circumferential surface 51 of the exterior member 50, sealing the gap between the inner circumferential surface 51 of the exterior member 50 and the outer circumferential surface of the valve case 19.

[0050] The exterior member 50 has an annular portion 54 that protrudes from the inner circumferential surface 51 inward for its entire circumference at the second end. The annular portion 54 has a first orthogonal surface 55 which extends in the second radial direction, in other words, a surface perpendicular to the second axial direction, and a parallel surface 56 which extends from the second inner end of the first orthogonal surface 55 and is parallel to the second axial direction. The annular portion 54 also has a second orthogonal surface 57 which extends in the second radial direction from the second end of the parallel surface 56, in other words, a surface perpendicular to the second axial direction, and a first side recess 58 which is formed between the second orthogonal surface 57 and the inner circumferential surface and recessed toward the first side from the second orthogonal surface 57. The second end face 53 of the exterior member 50 is located second to the second side of the second orthogonal surface 57.

[0051] The exterior member 50 has an inner recess 59 that is recessed inward from the outer peripheral surface 52. The inner recess 59 has a bottom surface 59A at its deepest point that is perpendicular to the second radial direction and parallel to the second axial direction. The exterior member 50 has protrusions 60 on each side of the width direction of the bottom surface 59A that project outward from the outer peripheral surface 52. The protrusion 60 has a protrusion end surface 61 that is in the same position as the end surface 53 in the second axial direction, and a third orthogonal surface 62 that is located first to the protrusion end surface 61 and is perpendicular to the second axial direction. The protrusion 60 also has a first side surface 63 that is perpendicular to the width direction and is located on the innermost side of the recess 59, and a second side surface 64 that is perpendicular to the width direction and is located at the boundary between the protrusion end surface 61 and the third orthogonal surface 62. Furthermore, the protrusion 60 has an inclined surface 65 that, from the end in the direction protruding from the outer peripheral surface 52 (hereinafter sometimes referred to as the "tip direction") on the third orthogonal surface 62, gradually slopes toward the first side as it approaches the tip direction. Note that the position in the second axial direction on the third orthogonal surface 62 is located on the second side than the position in the second axial direction on the second orthogonal surface 57.

[0052] Furthermore, the exterior member 50 is molded so that its thickness is uniform in both the areas where the inner recess 59 is formed in the circumferential direction and the areas where the inner recess 59 is not formed. Therefore, the exterior member 50 has a protrusion 67 that projects from the inner circumferential surface 51 to the second inner side of the inner recess 59. The protrusion 67 extends to the areas where the inner recess 59 is not formed in the second axial direction, and the first side portion of the protrusion 67 is fitted into a recess 19J formed in the valve case 19. Because the first side portion of the protrusion 67 is fitted into the recess 19J formed in the valve case 19, rotation of the exterior member 50 around the center line CL relative to the valve case 19 is suppressed.

[0053] Furthermore, the exterior member 50 has a projection 68 that protrudes second inward from the inner circumferential surface 51, on the first side of the annular portion 54. The projection 68 is rectangular parallelepiped with the second axial direction as the longitudinal direction, and multiple projections are provided at equal intervals in the circumferential direction in areas where the convex portion 67 is not provided. In the second radial direction, the projection 68 is provided second outward from the first orthogonal surface 55, and in the second axial direction, it extends from the central portion to the annular portion 54.

[0054] The exterior member 50, configured as described above, is attached to the valve case 19 and the cylindrical case 34 after the cylindrical case 34 has been assembled to the valve case 19. The exterior member 50 is movable in the second axial direction to the first side until the first orthogonal surface 55 of the annular portion 54 abuts against the second end face of the coil-side cylindrical portion 34B of the cylindrical case 34.

[0055] After the exterior member 50 is attached to the valve case 19 and the cylindrical case 34, the overmolding 70 is assembled. The overmolding 70 is assembled so that the cylindrical portion 71 is inserted into the second inner side of the coil-side cylindrical portion 34B of the cylindrical case 34 until the ring 34B2 fitted into the first recess 713 fits into the recess 34F formed in the cylindrical case 34. As the cylindrical portion 71 is inserted into the second inner side of the coil-side cylindrical portion 34B of the cylindrical case 34, the seal ring 70J fitted into the second recess 714 of the cylindrical portion 71 comes into contact with the inclined surface 34K of the coil-side cylindrical portion 34B. The seal ring 70J is crushed between the inclined surface 715 of the cylindrical portion 71 of the overmolding 70 and the inclined surface 34K of the coil-side cylindrical portion 34B of the cylindrical case 34. After the seal ring 70J is compressed, the overmolded 70 moves further toward the first side in the second axial direction, and the ring 34B2 fits into the first recess 713 and recess 34F, thereby determining its position relative to the cylindrical case 34. More specifically, a force acts on the overmolded 70 toward the second side in the second axial direction due to the restoring force from the elastic deformation of the seal ring 70J acting on the inclined surface 715 of the cylindrical portion 71. On the other hand, the surface of the first side of the first recess 713 of the overmolded 70 receives a force from the ring 34B2 toward the first side. The position of the overmolded 70 relative to the cylindrical case 34 is determined when these forces acting on the overmolded 70 toward the second side and the forces acting toward the first side balance each other.

[0056] With the overmolding 70 assembled to the cylindrical case 34 and the exterior member 50, the first outer peripheral surface 711 of the cylindrical portion 71 of the overmolding 70 faces the inner peripheral surface of the coil-side cylindrical portion 34B of the cylindrical case 34. The second outer peripheral surface 712 of the cylindrical portion 71 of the overmolding 70 faces the parallel surface 56 of the annular portion 54 of the exterior member 50. The first parallel surface 723 of the lid portion 72 of the overmolding 70 faces the inner peripheral surface 51 of the exterior member 50.

[0057] On the other hand, in the second axial positional relationship of the overmolding 70 with respect to the exterior member 50, a gap 83 in the second axial direction is formed between the second orthogonal surface 57 of the annular portion 54 of the exterior member 50 and the first orthogonal surface 721 of the lid portion 72 of the overmolding 70. A sealant 85 is provided in the gap 83. In other words, the sealant 85 is present in the gap 83 so as to contact both the second orthogonal surface 57 of the exterior member 50 and the first orthogonal surface 721 of the overmolding 70, sealing the space between the exterior member 50 and the overmolding 70. The sealant 85 is applied in liquid form to the second orthogonal surface 57 of the annular portion 54 of the exterior member 50 before the overmolding 70 is assembled to the cylindrical case 34 and the exterior member 50, and hardens after the gap 83 is formed between the second orthogonal surface 57 and the first orthogonal surface 721. A portion of the sealant 85 applied to the second orthogonal surface 57 of the annular portion 54 of the exterior member 50 moves to the first side recess 58 when the overmolding 70 is assembled to the exterior member 50.

[0058] Furthermore, when the overmolding 70 is assembled to the cylindrical case 34 and the exterior member 50, the side surface 745, which is the end face in the width direction of the connecting portion 74, is located between the second side surfaces 64 of the two protrusions 60 of the exterior member 50. Also, the first protrusion 741 is located within the inner recess 59 of the exterior member 50. In other words, the first protrusion 741 faces the bottom surface 59A of the exterior member 50 between the first side surfaces 63 of the two protrusions 60 of the exterior member 50. The position in the tip direction of the end face of the protrusion 60 is the same as the position in the tip direction of the end face of the first protrusion 741. Because the side surface 745 of the overmolding 70 is located between the second side surfaces 64 of the two protrusions 60 and the first protrusion 741 is located between the first side surfaces 63 of the two protrusions 60, rotation of the overmolding 70 around the axis of the shaft portion 43 relative to the exterior member 50 and the cylindrical case 34 is suppressed.

[0059] Furthermore, when the overmolding 70 is assembled to the cylindrical case 34 and the exterior member 50, the second orthogonal surface 722 of the lid portion 72 of the overmolding 70 faces the second end face 53 of the exterior member 50. Also, the first end face 740 of the connecting portion 74, which is a flat surface continuous with the first orthogonal surface 721 of the lid portion 72 of the overmolding 70, faces the third orthogonal surface 62 of the protrusion 60 of the exterior member 50. And the inclined surface 743 of the second protrusion 742 faces the inclined surface 65 of the protrusion 60 of the exterior member 50.

[0060] In the damping force adjustment device 17 configured as described above, the seal ring 70J, which contacts the inclined surface 715 of the cylindrical portion 71 of the overmolding 70 and the inclined surface 34K of the coil-side cylindrical portion 34B of the cylindrical case 34, prevents water and the like from entering the second inner side of the coil-side cylindrical portion 34B. Furthermore, the damping force adjustment device 17 prevents water and the like from entering the seal ring 70J with a sealant 85 provided in the gap 83 between the second orthogonal surface 57 of the exterior member 50 and the first orthogonal surface 721 of the overmolding 70. In addition, the first parallel surface 723 of the lid portion 72 of the overmolding 70 is positioned on the second inner side of the inner circumferential surface 51 of the exterior member 50, making it difficult for water and the like to enter the sealant 85. Furthermore, because the end face 53 of the exterior member 50 and the second orthogonal surface 722 of the lid portion 72 of the overmolding 70 face each other, water and the like are less likely to penetrate the gap between the inner circumferential surface 51 of the exterior member 50 and the first parallel surface 723 of the overmolding 70. As a result of the above, even if water sprayed by a high-pressure washer is applied to the damping force adjustment device 17, the penetration of water and the like into the second inner side of the coil-side cylindrical portion 34B is suppressed.

[0061] Furthermore, although the second end or end face 53 of the exterior member 50 is not present in the area where the connection portion 74 of the overmolding 70 is located, the first protrusion 741 of the connection portion 74 covers the sealant 85. In other words, the first protrusion 741 of the connection portion 74 is located within the inner recess 59 so as to face the bottom surface 59A of the exterior member 50. As a result, it is difficult for water or the like to penetrate the sealant 85 through the gap between the first protrusion 741 of the connection portion 74 and the bottom surface 59A of the exterior member 50. Also, even if water sprayed by a high-pressure washer is applied to the damping force adjustment device 17, the first protrusion 741 prevents the water from directly hitting the sealant 85.

[0062] Furthermore, a second projection 742 of the connecting portion 74 exists on the tip side of the portion where the first end face 740 of the connecting portion 74 and the third orthogonal surface 62 of the protrusion 60 of the exterior member 50 face each other, and the inclined surface 65 of the protrusion 60 of the exterior member 50 faces the inclined surface 743 of the second projection 742. As a result, it is difficult for water or the like to penetrate the sealant 85 through the gap between the first end face 740 of the connecting portion 740 and the third orthogonal surface 62 of the protrusion 60 of the exterior member 50. Also, since the position in the second axial direction on the third orthogonal surface 62 of the exterior member 50 is located two positions to the side of the second axial direction on the second orthogonal surface 57, the gap between the first end face 740 and the third orthogonal surface 62 is smaller than the gap between the first orthogonal surface 721 of the lid portion 72 and the second orthogonal surface 57. Therefore, it is difficult for water or the like to penetrate the sealant 85 through the gap between the first end face 740 of the connecting portion 74 and the third orthogonal surface 62 of the protrusion 60 of the exterior member 50.

[0063] As described above, the solenoid 33 includes a valve case 19, which is a cylindrical member, with its first end in the second axial direction (an example in the direction of the centerline) fixed to the outer cylinder 103, and an overmolded 70 (an example of a first member) that holds a coil 37 housed in the cylindrical case 34. Hereinafter, the valve case 19 and the cylindrical case 34 may simply be referred to as "case 90". The overmolded 70 has a lid portion 72 that covers the opening 34G of the case 90, a connector portion 73 for supplying current to the coil 37, and a connecting portion 74 that connects the lid portion 72 and the connector portion 73. The solenoid 33 also includes an exterior member 50 (an example of a second member) which is cylindrical and arranged around the case 90, and forms a gap 83 in the second axial direction between itself and the overmolded 70, and a sealant 85 (an example of a sealing member) provided in the gap 83. The exterior member 50 has an inner recess 59 (an example of a recess) that is recessed from the outer peripheral surface 52 (an example of an outer surface), and a plurality of protrusions 60 that are provided on both sides of the inner recess 59 and protrude from the outer peripheral surface 52. The overmolding 70 has a first protrusion 741 (an example of a protrusion) that protrudes from the connecting portion 74 in the second axial direction and is positioned in the inner recess 59 between the plurality of protrusions 60.

[0064] With the solenoid 33 configured as described above, the first protrusion 741 of the overmolding 70 contacts the convex portion 60 of the exterior member 50, thereby preventing the overmolding 70 from rotating around the axis of the shaft portion 43 relative to the exterior member 50. In addition, the first protrusion 741 of the overmolding 70 makes it difficult for water or the like to penetrate the sealant 85 from the outside. Furthermore, in the solenoid 33, the overmolding 70 achieves the suppression of water and the like with a single molded resin body having a lid portion 72, a connector portion 73, and a connecting portion 74, thus enabling cost reduction.

[0065] Here, the exterior member 50 has an annular portion 54 provided around the center line so as to protrude from the inner circumferential surface 51 (an example of an inner surface) toward the center line. The overmolding 70 has a cylindrical portion 71 (an example of an inner portion) which is positioned second inward (an example toward the center line) from the annular portion 54, and a first orthogonal surface 721 (an example of an outer portion) which is provided second outward from the cylindrical portion 71 and forms a gap 83 between it and the annular portion 54.

[0066] The second end of the exterior member 50 in the second axial direction is located on the opposite side of the gap 83 from the first orthogonal plane 721, and the portion where the connecting portion 74 is located is cut out. This prevents water and other substances from entering the sealant 85. The exterior member 50 also prevents the size of the damping force adjustment device 17 in the second axial direction from increasing due to the provision of the connecting portion 74. In other words, to prevent water and other substances from entering the sealant 85, it is conceivable to form the end face 53 of the exterior member 50 around its entire circumference. However, if the end face 53 is formed around its entire circumference, the first end face 740 of the connecting portion 74 of the overmolding 70 must be positioned second to the end face 53, which increases the size of the damping force adjustment device 17 in the second axial direction. In contrast, by cutting out a portion of the second end of the exterior member 50 in the second axial direction and placing the connecting portion 74 in the cut-out portion, the size in the second axial direction is reduced.

[0067] The exterior member 50 has a plurality of protrusions 60 at the cut-out portion of the second end, and the protrusions 60 have a third orthogonal surface 62 (an example of an opposing surface) that faces the end surface 740, which is the first side surface of the connection portion 74. This prevents water and other substances from entering the sealant 85 from the cut-out portion of the exterior member 50.

[0068] Furthermore, the protrusion 60 has an inclined surface 65 that faces the first side in accordance with its projection on the opposite side of the center line CL, and the overmolding 70 has a second protrusion 742 that protrudes from the end face 740 of the connecting portion 74 so as to face the inclined surface 65, next to the first protrusion 741. This prevents water and the like from entering the gap between the first end face 740 of the connecting portion 74 and the third orthogonal surface 62 of the protrusion 60 of the exterior member 50.

[0069] The exterior member 50 has a protrusion 67 (an example of a fitting portion) that protrudes second inward from the inner circumferential surface 51 and fits into a recess 19J (an example of a recess) recessed from the outer circumferential surface of the valve case 19. This determines the position of the exterior member 50 around the center line CL relative to the case 90. The solenoid 33 also includes a seal ring 19H (an example of a second seal member) that seals the gap between the outer circumferential surface of the valve case 19 and the inner circumferential surface 51 of the exterior member 50. This prevents water or the like from entering the inside of the case 90.

[0070] In the embodiments described above, a sealant 85 is exemplified as a sealing member provided in the gap 83 between the overmolding 70 and the exterior member 50. This sealant is applied to the exterior member 50 in a liquid state and hardens after the gap 83 is formed between the overmolding 70 and the exterior member 50. However, the sealing member is not limited to the sealant 85. It may also be a ring-shaped sealing member with a circular or elliptical cross-section (for example, an O-ring).

[0071] Furthermore, in the above explanation, "orthogonal" is not limited to the angle between one plane or line and the other plane or line being a right angle (in other words, 90°). For example, an angle between one plane or line and the other plane or line being 87° or more but less than 90° may also be considered "orthogonal." Similarly, "parallel" is not limited to the angle between one plane or line and the other plane or line being 0°. An angle between one plane or line and the other plane or line being 3° or less may also be considered "parallel."

[0072] <Second Embodiment> Figure 9 is a perspective view showing an example of the appearance of the exterior member 250 of the damping force adjustment device 217 according to the second embodiment. Figure 10 is a diagram showing an example of a cross-section of the damping force adjustment device 217 according to the second embodiment. Figure 10 is an example of a diagram showing the damping force adjustment device 217 cut at the part corresponding to section VII-VII in Figure 4. The damping force adjustment device 217 according to the second embodiment differs from the damping force adjustment device 17 according to the first embodiment in that the protrusion 260 of the exterior member 250 corresponds to the protrusion 60 of the exterior member 50. Also, the damping force adjustment device 217 differs from the damping force adjustment device 17 in that the second protrusion 242 of the overmolding 270 corresponds to the second protrusion 742 of the overmolding 70. The differences from the first embodiment will be described below. The same reference numerals are used for the same parts in the first and second embodiments, and their detailed descriptions will be omitted.

[0073] In the damping force adjustment device 17 according to the first embodiment, the second projection 742 is provided on the tip side of the inclined surface 65 of the convex portion 60, but in the damping force adjustment device 217 according to the second embodiment, a part of the convex portion 260 is provided on the tip side of the second projection 242. More specifically, as shown in Figure 9, instead of having an inclined surface 65, the convex portion 260 has a recess 265 formed that is recessed toward the first side from the third orthogonal surface 262, which corresponds to the third orthogonal surface 62.

[0074] The second projection 242 differs from the second projection 742 in that it does not have an inclined surface 743 (see Figure 5) and its position in the direction of the tip. The second projection 242 is rectangular parallelepiped, and as shown in Figure 10, the surface of the second projection 242 on the connector portion 73 side (see Figure 5) (in other words, the tip side) is located closer to the lid portion 72 (see Figure 5) than the surface of the first projection 741 on the connector portion 73 side. Furthermore, the surface of the second projection 242 on the lid portion 72 side is a flat surface that is continuous with the surface of the first projection 741 on the lid portion 72 side.

[0075] Then, with the overmolding 270 assembled to the exterior member 250, the second projection 242 of the overmolding 270 is fitted into the recess 265 of the convex portion 260 of the exterior member 250. In the damping force adjustment device 217 according to the second embodiment configured as described above, it is possible to suppress the intrusion of water, etc., into the sealant 85, and since the overmolding 270 can be molded from a single molded resin body, the cost can be reduced.

[0076] 1...Suspension device, 2...Buffing device, 10...Cylinder section, 12...Rod, 13...Piston section, 17, 217...Damping force adjustment device, 19...Valve case, 19H...Seal ring (example of second seal member), 19J...Recess (example of recess), 23...Main disc valve, 34...Cylindrical case, 34G...Opening, 37...Coil, 50...Exterior member (example of second member), 52...Outer surface (example of outer surface), 54...Annular section, 59...Inner recess (example of recess), 60, 260...Convex section 62...Third orthogonal surface (an example of an opposing part), 65...Inclined surface, 67...Protrusion (an example of a fitting part), 70, 270...Overmolding (an example of a first member), 71...Cylindrical part (an example of an inner part), 72...Lid part, 73...Connector part, 74...Connection part, 83...Gap, 85...Sealant (an example of a sealing member), 90...Case, 101...Cylinder, 102...Intermediate cylinder, 103...Outer cylinder, 721...First orthogonal surface (an example of an outer part), 741...First protrusion (an example of a protrusion), 742...Second protrusion

Claims

1. A solenoid comprising: a first member having a lid portion that holds a coil housed in a case, the first end of which in the direction of the centerline is fixed to an outer cylinder, and covers the opening of the case; a connector portion for energizing the coil; and a connecting portion that connects the lid portion and the connector portion; a second member having a tubular shape, positioned around the case, and forming a gap in the direction of the centerline between itself and the first member; and a sealing member provided in the gap, wherein the second member has a recess that is indented from its outer surface and a plurality of protrusions provided on both sides of the recess that protrude from the outer surface; and the first member has a projection that protrudes from the connecting portion in the direction of the centerline and is positioned in the recess between the plurality of protrusions.

2. The solenoid according to claim 1, wherein the second member has an annular portion provided around the center line so as to protrude from the inner surface toward the center line, and the first member has an inner portion provided on the inside side of the annular portion toward the center line, and an outer portion provided on the outside side of the inner portion toward the opposite side of the center line and forming the gap between the inner portion and the annular portion.

3. The solenoid according to claim 2, wherein the second end of the second member in the direction of the centerline is provided on the opposite side of the gap from the outer portion, and the portion where the connecting portion is located is cut out.

4. The solenoid according to claim 3, wherein the second member has the plurality of protrusions in the portion where the end on the second side is cut out, and the protrusions have opposing portions that face the first side surface of the connection portion.

5. The solenoid according to claim 4, wherein the protrusion has an inclined surface toward the first side in accordance with the protrusion projecting toward the opposite side of the center line, and the first member has a second protrusion adjacent to the protrusion that protrudes from the first side surface of the connection portion so as to face the inclined surface.

6. The solenoid according to claim 1, wherein the second member has a fitting portion that protrudes from the inner surface toward the center line and fits into a recess formed on the outer surface of the case.

7. The solenoid according to claim 1, wherein the sealing member is applied to the second member in a liquid state and hardens after the gap is formed between it and the first member.

8. The solenoid according to claim 1, further comprising a second sealing member for sealing the gap between the outer surface of the case and the inner surface of the second member.

Images