JPH0493004A - Solenoid apparatus - Google Patents

Abstract

PURPOSE:To improve productivity with easy built-in work by coupling a pair of coil bobbins through fitting to secure in the inner peripheral face of a yoke. CONSTITUTION:Both bobbins 4, 4 are faced at one end flange 8, 8, each with yokes arranged midway. Fit-in projections 101-103 of both the bobbins 4, 4 are fitted into yoke engagement grooves 251-253, thereby making both the bobbins 4, 4 axially couple each other via yokes. In this coupled state, the fit-in projections 101-103 of both the bobbins 4 contact each other, gap-constituting projections 12 of one end side flanges 8, 8 contact yokes 5, whereby a gap for resin infiltration in molding is constituted between the yokes and the coil bobbins 4, 4. In this way, the main body 21a of a second terminal fitting 21 overlap with the main body 23a of a third terminal fitting 23, and the overlap is welded by projection.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a solenoid device incorporated into a solenoid valve or the like.

(Prior Art) Conventionally, a solenoid device including a pair of coil bobbins arranged to face each other in the axial direction and a yoke interposed between the opposing surfaces of these coil bobbins is disclosed in British Patent No. 1, for example.
．． 42878] and the like.

(Problem to be Solved by the Invention) In such a conventional solenoid device, one coil bobbin, a yoke integrated with a fixed core, and the other bobbin are housed in this order in the magnetic path forming housing. Ta.

Therefore, the installation work is complicated and mass productivity is low.

The present invention has been made in view of the above-mentioned Mf circumstances, and an object of the present invention is to provide a solenoid device that is easy to assemble and can improve mass productivity.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a solenoid comprising a pair of coil bobbins disposed facing each other in the axial direction, and a yoke interposed between opposing surfaces of these coil bobbins. The device is characterized in that the pair of coil bobbins are connected to each other by being fitted and fixed to the inner peripheral surface of the yoke.

In addition, in order to simplify the electrical connection work between the cover for configuring the magnetic path frame and the yoke, the coil bobbins connected to each other are built into a casing made of resin mold, and the outer peripheral surface of the yoke is exposed on the outer surface of the casing. Then, a pair of covers for configuring a magnetic path frame made of a magnetic material were fitted to the casing from both ends thereof, and the inner circumferential surfaces of these covers at opposite ends were press-fitted to the outer circumferential surface of the yoke.

In addition, the resin is reliably infiltrated between the coil bobbin and the yoke when the casing is molded, and the adhesiveness of the resin to the surface of the coil bobbin facing the yoke is increased. In order to improve the sealing performance between the coil bobbin and the yoke, a press-fit protrusion that is press-fitted into the engagement groove of the yoke and a gap-forming protrusion that abuts the opposite end surface of the yoke are provided on the surface of the coil bobbin facing the yoke. The surface of the coil bobbin facing the yoke is roughened so as to have a labyrinth seal function.

In addition, in order to better correspond to the automatic winding process of automatically winding the coil winding around the coil bobbin, a winding start end of the coil winding to be wound around the coil bobbin is placed on the surface of the coil bobbin facing the yoke. A locking protrusion for locking and fixing the end portion of the winding is protrudingly provided, and each of these locking protrusions is provided with a blade portion for cutting the coil winding.

Furthermore, in order to improve mass productivity, a socket to which a plug at one end of the electric cord is connected is integrally molded into the casing.

(Example) Hereinafter, one example of the present invention will be described based on the drawings. 1st
The figure is a longitudinal sectional view of a solenoid valve equipped with the solenoid device of the present invention, FIG. 2 is an exploded perspective view of the same solenoid valve, FIG. 3 is a longitudinal sectional view of the solenoid device of the present invention, and FIG. 5 is a perspective view of a single coil bobbin in the same solenoid device, FIG. 6 is a perspective view of a pair of coil bobbins and a yoke in the same device in an unconnected state, and FIG. 7 is a perspective view of the same in a connected state. be. In Figure 1, 1 is a solenoid valve, and 2
As shown in the figure, it has a two-unit configuration consisting of a solenoid device 2 of the present invention, which is made into a unit, and a valve device 3, which is also made into a unit.

The solenoid device 2 includes a pair of coil bobbins 4°4 and 1
It has two yokes 5 and a pair of covers 6.6 for configuring the magnetic path frame.

The coil bobbins 4.4 are made of synthetic resin and have the same structure. As shown in FIGS. 5 and 6, the coil bobbin 4 is made up of a short-axis cylindrical main body 7 whose both end faces are open, and annular flanges 8 and 9 integrally protruding from the outer periphery of both ends. On the inner peripheral side of the surface 8a of the flange 8 on the one end side, there are a plurality of (three in this embodiment) press-fit protrusions 10. ．． 102,10
3 integrally protrudes toward the axial direction of the main body 7.

These press-fit protrusions 10. 103 is in the shape of a small rectangular piece. Further, on the surface of the flange 8 on the one end side, a projecting wall 11 having a planar substantially rectangular shape and projecting outward is integrally provided at a position facing the intermediate press-fit projection 10□. The protruding wall 11 has an arcuate inner edge corresponding to the inner circumferential edge of the flange 8, and an outer edge of the protruding wall 11.
It protrudes in the radial direction from the outer peripheral edge of. In addition, the protruding wall 1
The surface 11a of the flange 8 protrudes from the surface 8a of the flange 8 in the axial direction. On the outer peripheral side of the surface 8a of the flange 8 on the one end side, press-fit protrusions 10. ．． 1
01 and the intermediate press-fitting protrusion 10□, and the press-fitting protrusions 10.01 facing each other. ．． 103 and the protruding wall 11, gap forming protrusions 12 are integrally protruded from each other. These gap forming projections 12 have a small diameter conical shape. A pair of terminal fitting fitting holes 13, . 13□ is open. Surface 11 of protruding wall 11
Terminal fitting fitting holes 1.3. ．． 132, a locking protrusion 14. ．． 14□ are integrally provided. These locking protrusions 14+, 14□ have a planar trapezoidal shape, and a winding start end or winding end of a coil winding, which will be described later, is selectively locked to these locking protrusions 141, 142, respectively. One of the locking protrusions 14□ projects with its wide side facing outward and its narrow side facing inside. The other locking protrusion 14□
Opposite to one of the locking protrusions 141, the protrusion protrudes with its wide side facing inward and its narrow side facing outside. The corner portions 151° and 15□ on both sides of the wide surfaces of both locking protrusions]i, , 142 are acute angles, and constitute blade portions for cutting the coil winding. On both sides of the protruding end of the protruding wall 11, hooking protrusions 16 and 17 for pulling the coil winding are integrally protruded in the radial direction. Further, on the outer circumferential side of the surface 8a of the flange 8, which is located near one end side (the left side in FIG. 5) of the protruding wall 1, there is a hooking protrusion 18 for hooking the coil winding in the axial direction of the main body 7. It is protruded from one piece. The surfaces 8a and 9a of the flanges 8 and 9 on both end sides are roughened surfaces having a labyrinth seal function by integrally forming a large number of concentric thin protrusions. In addition, the surface 1 of the protruding wall 11
], a and both side surfaces 1 ], b are also rough surfaces having a labyrinth seal function by integrally forming a large number of thin linear protrusions.

Also, the surface 9a of the flange 9 on the other end side of the coil bobbin 4
Arc-shaped protrusions 19 for forming a gap are integrally provided on the inner circumferential side of the protrusion 19 at intervals in the circumferential direction. Figures 1 and 3
The terminal fitting fitting hole 13 of the coil bobbin 4 located on the -F side in the figure. .

The proximal ends of the first and second terminal fittings 20.21 are press-fitted into the terminals 132. The first terminal fitting 20 has a fitting piece 20b bent in a right angle direction on one end side of the main body 20a along the axial direction of the first coil bobbin 4, and a fitting piece 20b on the opposite side of the fitting piece 20b on the other end side of the main body 20a. A terminal piece 20d that faces apart from the main body 20a is bent through a connecting piece 20c that is bent in a direction perpendicular to the main body 20a.
0d is designed to fit into contact with a terminal piece of a plug (not shown). Further, the second terminal metal A21 is formed by bending a fitting piece 21b in a perpendicular direction on one end side of the main body 21a along the axial direction of the first coil bobbin 4. First terminal fitting 2
The fitting piece 20b of No. 0 is fitted into one terminal fitting fitting hole 13 of one coil bobbin 4, and the main body 20a extends toward the flange 9 on the other end side of one coil bobbin 4.

The fitting piece 21b of the second terminal fitting 21 is fitted into the other terminal fitting fitting hole 13□ of one coil bobbin 4, and the main body 21
a extends toward the other end.

The length of the main body 21a of the second terminal fitting 21 is set to the length of the main body 20a of the first terminal fitting 20 /2.

A coil winding 22 is wound around the outer periphery of the main body 7 of the one coil bobbin 4 . Winding start end 22 of this coil winding 22
1 is fixed to the locking protrusion 18 of one coil bobbin 4 and the locking protrusion 14 of the one coil bobbin 4, and is held by the clamping part 21c of the second terminal fitting 2].
1, the winding is locked. Further, the winding end portion 22 □ of the coil winding 22 is not hooked to the hooking protrusion 17 of one coil bobbin 4, and is not hooked to the holding portion 22 of the first terminal fitting 20.
c, and the winding is locked to the other locking protrusion 142 of one coil bobbin 4.

In the terminal fitting fitting holes 131 and 132 of the other coil bobbin 4 located on the lower side in FIGS. 1 and 3, a third,
Fourth terminal fittings 23 and 24 are press-fitted. Third,
The fourth terminal fittings 23 and 24 have the same configuration, and have fitting pieces 23b and 24b bent at right angles to one end of the main bodies 23a and 24a along the axial direction of the other coil bobbin 4. Fitting piece 23b on the other end side
, terminal pieces 23d and 24d facing away from the main bodies 23a and 24a are bent through connecting pieces 23c and 24c which are bent in a right angle direction toward the opposite side from the main bodies 23a and 24a,
The terminal pieces 23d and 24d are adapted to fit into contact with a terminal piece of a plug (not shown). The fitting pieces 23b and 24b of the third and fourth terminal fittings 23 and 24 are fitted into the locking protrusions 13□ and 132 of the other coil bobbin 4, respectively, to form the main body 23a.

24a extends toward the -y-y angle 8 on one end side of the other coil bobbin 4. When both coil bobbins 4.4 are connected, the connection pieces 23c, 24. of these third and fourth terminal fittings 23.24. c is at the same level as the connecting piece 20c of the first terminal fitting 20, and the tips of the terminal pieces 23d and 24d of the third and fourth terminal fittings 23.24 are at the same level as the connecting piece 20c of the first terminal fitting 20. It will be on the same level as the tip. A coil winding 2 is attached to the outer periphery of the main body 7 of the other coil bobbin 4.
2 is wrapped. Winding start end 22 of this coil winding 22. is fixed to the locking protrusion 17 of the other coil bobbin 4, and is held by the clamping portion 24e of the fourth terminal 24 to be wound and locked to the other locking protrusion 142 of the other coil bobbin 4.

Further, the winding end portion 222 of the coil winding 22 is stopped from being hooked to the hooking protrusion 8 and the hook 6 of the other coil bobbin 4, and is held by the holding portion 23e of the third terminal fitting 23, so that the winding end portion 222 of the coil winding 22 is held on the other coil bobbin 4. The winding is locked to one of the locking protrusions 14□.

The yoke 5 is made of a magnetic material such as ferrous metal and has an arc shape with a part of its periphery cut out, and has press-fitted protrusions 10 to 103 on the coil bobbins 4, 4 on its inner circumferential surface. The engaging grooves 25, . 252 and 253 are formed. Further, on the outer circumferential surface of the yoke 5, a plurality of (for example, two) notches 26 are provided at predetermined intervals in the circumferential direction. ．． 262
is formed.

As shown in FIG. 6, the yoke 5 is disposed in the middle, and the flanges 8, 8 at one end of the coil bobbins 4, 4 are opposed to each other. Then, the press-fit protrusions 101 to 03 of both coil bobbins 4, 4 are inserted into the engagement groove 2 of the yoke 5.
By press-fitting and securing the coil bobbins 51 to 253, the coil bobbins 4, 4 are connected to each other in the axial direction via the yoke 5, as shown in FIG. In this connected state, the press-fit protrusions 101 to 103 of both coil bobbins 4 are in contact with each other, and the gap forming protrusion 1 of the flanges 8 and 8 on one end side
2 comes into contact with the yoke 5, a gap is formed between the yoke 5 and the flanges 8, 8 of both coil bobbins 4, 4, through which resin during molding can infiltrate.

With the coil bobbins 4, 4 connected in this manner, the main body 21a of the second terminal fitting 21 overlaps with the main body 23a of the third terminal fitting 23, and the overlapping portion is projection welded. As shown in FIG. 7, after the coil bobbins 4, 4 are connected to each other in the axial direction via the yoke 5, this is housed in a resin casing 27 by molding. At this time, the outer peripheral surface of the yoke 5 is exposed to the outer surface of the casing 27. Further, a socket 28 is integrally formed when the casing 27 is molded, and the terminal pieces 20d, 23d, 24 of each terminal fitting 20, 23.
d is located. A plug at one end of an electric cord (not shown) is inserted into this socket 28 and connected.

The outer circumferential surface of the casing 27 has a tapered shape that gradually increases in diameter toward the yoke 5 side. cover 6
．． 6 has a short-axis cylindrical shape made of a magnetic material such as iron-based metal. The cover 6.6 is completely open on one end and has a circular opening 29 on the other end. The cover 6.6 is attached to the casing 27 by fitting onto the outside of the casing 27 from both ends thereof and press-fitting the inner circumferential surface on one end side to the outer circumferential surface of the yoke 5. The road frame is constructed.

The valve device 3 has a pair of pipes 30 , 31 axially connected to each other via the core 29 . An inlet side cylindrical body 32 is fitted into one of the pipes 30 located on the lower side in FIG.

In addition, the other pipe 31 located on the upper side in FIG.
An outlet side cylindrical body 33 is fitted in the. Inlet side cylinder 32
The diameter is smaller on the lower side than the upper side from the substantially middle part in the axial direction. A plurality of communication holes 34 along the axial direction are formed at intervals in the circumferential direction at the boundary step between the small diameter part 32a and the large diameter part 32b of the inlet side cylinder 32. Further, the lower end of the small diameter portion 32a serves as an inflow port 32c. A first filter 36 is fitted inside the center hole 35 of the small diameter portion 32a, below the substantially middle portion in the axial direction. A communication hole 37 is provided in the center of the small diameter portion 32a above the approximately middle portion in the axial direction of the center hole 35.
A first valve seat member 38 having a diameter is fitted therein. This first
The center of the upper end surface of the valve seat member 38 is a valve seat surface 38a, and a first valve body 39 made of a ball comes into contact with and separates from this valve seat surface 38a.

This first valve body 39 is held by a central holder portion 41 of a first armature 40 . This 17th - Mage 40
is fitted into the center hole 74 of the large diameter portion 32b of the inlet side cylinder 32 via the sleeve 42 so as to be able to move up and down within a predetermined range in the axial direction. The first armature 40 has a spring fitting hole 43 which also serves as a flow path at the center of the upper side of the axially intermediate portion.
have. A flow path 45 on the outer periphery of the holder portion 42 is connected to the spring fitting hole 4 through the lower center hole 44 of the spring fitting hole 43.
It communicates with 3. A flow path 46 is provided on the outer peripheral surface of the first armature 40 along its axial direction.

A first armature core b collar 47 is fitted inside the center hole 29a of the core 29 below the substantially middle portion in the axial direction. The first armature stopper 47 is ring-shaped, and a plurality of notches 48 for communication passages are formed on both end surfaces thereof at intervals in the circumferential direction. The lower end surface of the first armature stopper 47 projects slightly below the lower end surface of the core 29. When the solenoid device 2 is turned on and the first armature 40 rises against the biasing force of the return spring 19 (described later), its upper end surface comes into contact with the lower end surface of the first armature stopper 47. The upper limit position of the first armature 40 is regulated. The first armature 40 is urged downward by a return spring 49 made of a coil spring. The return spring 549 is interposed between the lower end step of the spring fitting hole 43 of the first armature 40 and the lower end surface of the second valve seat member 50. The second valve seat member 50 is fitted and fixed inside the center hole 29a of the core 29 above the substantially middle portion in the axial direction. This second valve seat part 50 has the same structure as the first valve seat member 38, has a communication hole 51 in the center, and has a valve seat surface 50a at the center of the upper end surface, and a ball is attached to this valve seat surface 50a. The second valve body 52 approaches and separates. This second valve body 52 is held by a central holder portion 54 of a second armature 53.

This second armature 53 is connected to the center hole 3 of the outlet side cylinder 33.
The sleeve 55 is fitted into the inside of the sleeve 3a below the substantially intermediate portion in the axial direction so as to be slidable within a predetermined range in the axial direction.

The second armature 53 has a communication hole 56 at the center of the interior above the substantially middle portion in the axial direction. A flow path 58 on the outer periphery of the holder portion 54 passes through the lower central hole 57 of the flow hole 56.
is in communication with the communication hole 56. A flow passage 59 is provided on the outer peripheral surface of the second armature 53 along its axial direction. A second armature stopper 60 is fitted and fixed inside the center hole 33a of the outlet side cylinder 33 above the substantially middle portion in the axial direction. This 21st - Machi Your Stoppa 6
0 has the same structure as the first armature stopper 47, and is ring-shaped, and a plurality of notches 61 for communication passages are formed on both end faces of the armature stopper 47 at intervals in the circumferential direction. Then, when the second armature 53 rises due to the biasing force J of the second return spring 62 (described later) due to the solenoid device 2 being turned off, its upper end surface abuts the lower end surface of the second armature stopper 6o, and this The 1st position of the 2nd armature 53 is regulated. The second armature 53 is urged in one direction by a second return spring 62 made of a coil spring. This second return spring 62 is connected to the lower end surface of the second armature 53 and the core 29.
It is interposed between the upper end surface of the The upper end surface of the outlet side cylinder 33 is an outlet 33b, and a second filter 63 is attached to the outlet 33b. Further, a third filter 64 is installed at the boundary between the small diameter portion 32a and the large diameter portion 32b of the inlet side cylinder 32 to cover the inflow side of the flow hole 34.

In the electromagnetic valve 1 configured in this manner, for example, the small diameter portion 32a and the large diameter portion 32b of the inlet side cylinder 32 are mounted in the mounting hole 65a of the modulator body 65. The inflow port 32c is communicated with an accumulator (not shown) via a first communication path 66 of the modulator body 65.

Further, the communication hole 34 of the inlet side cylinder 32 is communicated with an anti-lock control hydraulic chamber of the modulator (not shown) via a second communication passage 67 of the modulator body 65. The modulator controls the pressure in the wheel cylinder of a hydraulic anti-lock brake device (not shown) so that the slip ratio of the wheel falls within a predetermined range (for example, 0.1 to 0.3). Furthermore, the outlet 33b is communicated with a reserve tank (not shown). In addition, 68, 69, 70, 71. in FIG. ．． 72.73 is O for sealing
It's a ring.

Next, the operation of the solenoid valve configured as described above will be explained. When the solenoid device 2 is off, the first armature 40 is in a position moved downward by the biasing force of the first return spring 49;
The first valve body 39 is in close contact with the valve seat surface 38a of the first valve seat member 38. Further, the second armature 53 is in a position moved upward by the biasing force of the second return spring 62, and the second valve body 52 is spaced apart from the valve seat surface 50a of the second valve seat member 50. Therefore, the fluid flows from the second communication path 67 of the modulator body 65 to the third filter 64 to the small diameter portion 32a and the large diameter portion 32.
After passing through the path of the flow hole 34 at the boundary with b, one side passes through the flow path 45 on the outer periphery of the holder portion 41 of the first armadure 40 →
The other one passes through the path of the central hole 44→spring fitting hole 43, and the other passes through the path of the flow path 46 on the outer periphery of the first armature 40→the notch 48 at the lower end of the first armature stopper 47. After flowing into the vertical armature stopper 47, one side flows into the second armature stopper 47 from the flow hole 51 of the second valve seat member 50.
The other passes through the path of the flow path 58 on the outer periphery of the holder portion 54 → the center hole 57 → the flow hole 56, and the other path passes through the path of the flow path 59 on the outer periphery of the second armature 53 → the notch 61 at the lower end of the 21st vertical stopper 60. After flowing into the second armature stopper 60, it flows out through the second filter 63 and into the reserve tank from the outlet 33b.

Further, when the solenoid device 2 is turned on, the first armature 40 moves in two directions against the biasing force of the first return spring 49, so that the first valve body 39 is moved against the valve seat of the first valve seat member 38. It is separated from the surface 38a.

Further, the second armature 53 moves downward against the biasing force of the second return spring 62, so that the second valve body 52 comes into close contact with the valve seat surface 50a of the second valve seat member 50. Therefore,
The fluid flows through the first communication path 66 of the modular body 65 → the inlet hole 32c → the first filter 36 → the center hole 3 of the small diameter portion 32a
5 → Pass through the path of the communication hole 37 of the first valve seat member 38, and one side is the communication hole 3 at the boundary between the small diameter part 32a and the large diameter part 32b.
4, and the other one is a flow path 45 on the outer periphery of the holder part 41 of the first armature 40 → center hole 44 → spring fitting hole 4
3 → Inside the first armature stopper 47 → Second valve seat member 5
0, flows into the flow hole 51 of the first armature stopper 47 through the path of the notch 48 at the lower end of the first armature stopper 47 → the flow path 46 on the outer periphery of the first armature 40, and flows into the small diameter portion 32a and the large diameter portion 32.
It flows into the communication hole 34 at the boundary with the third filter 64 and flows into the anti-lock control hydraulic chamber (not shown) via the second communication passage 67 of the modulator body 65.

(Effects of the Invention) As described above, according to the present invention, since the pair of coil bobbins are connected to each other by fitting and fixing to the inner peripheral surface of the yoke, it is possible to form a unit, and for example, it is easy to assemble a solenoid valve, etc. .

Further, the coil bobbins connected to each other are housed in a resin-molded casing, the outer circumferential surface of the yoke is exposed on the outer surface of the casing, and a magnetic path frame structure cover made of a pair of magnetic materials is attached to the casing from both ends thereof. Since the inner circumferential surfaces of these covers on the opposing end sides are press-fitted to the outer circumferential surface of the yoke, it is possible to simplify the work of magnetically connecting the cover for forming the magnetic path and the yoke.

Further, a press-fit protrusion that is press-fitted into an engagement groove of the yoke and a gap-forming protrusion that abuts on the opposite end face of the yoke are protruded from a surface of the coil bobbin facing the yoke, and the yoke of the coil bobbin and Since the opposing surface of the coil bobbin is roughened to have a labyrinth seal function, the resin will surely infiltrate between the coil bobbin and the yoke during casing molding, and the resin will have a high degree of adhesion to the coil bobbin's opposing surface with the yoke. Moreover, the sealing performance between the opposing surfaces of the coil bobbin and yoke and the resin is high.

Furthermore, a locking protrusion is protrudingly provided on a surface of the coil bobbin facing the yoke to lock and fix a winding start end and a winding end of the coil winding wound on the coil bobbin, and each of these locks Since the protrusion is provided with a blade portion for cutting the coil winding, it can be well adapted to an automatic winding process in which the coil winding is automatically wound around the coil bobbin.

Furthermore 1. Since the casing is integrally molded with a socket to which a plug at one end of the electric cord is connected, mass productivity is high.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a solenoid valve equipped with the solenoid device of the present invention, FIG. 2 is an exploded perspective view of the solenoid valve, and FIG. 3 is a solenoid of the present invention. Fig. 4 is a vertical sectional view of the device, and Fig. 5 is an exploded perspective view of the solenoid device.
The figure is a perspective view of a single coil bobbin in the same solenoid device, FIG. 6 is a perspective view of a pair of coil bobbins and a yoke in the same device in an uncoupled state, and FIG. 7 is a perspective view of the same in a coupled state. 2. Solenoid device, 4. Coil bobbin, 5. Yoke, 6. Cover, 101 to 103. Press-fit projection, 12. Gap formation projection, 14. ．． 14□・Latching protrusion, 151.15
2. Corner (blade), 22 Coil winding, 221. Winding start end, 222. Winding end, 251° 252.25
3. Engagement groove, 27. Casing, 28. Socket.

Claims (5)

[Claims] 1. In a solenoid device comprising a pair of coil bobbins arranged to face each other in an axial direction and a yoke interposed between opposing surfaces of these coil bobbins, the pair of coil bobbins are fitted and fixed to an inner circumferential surface of the yoke. A solenoid device characterized in that the solenoid devices are connected to each other by. 2. The coil bobbins connected to each other are housed in a resin-molded casing, the outer peripheral surface of the yoke is exposed on the outer surface of the casing, and a magnetic path frame configuration cover made of a pair of magnetic materials is fitted to the casing from both ends thereof. 2. The solenoid device according to claim 1, wherein inner circumferential surfaces of the covers on opposite ends thereof are press-fitted to the outer circumferential surface of the yoke. 3. A press-fit protrusion that is press-fitted into an engagement groove of the yoke and a gap-forming protrusion that abuts the opposite end surface of the yoke are protrudingly provided on a surface of the coil bobbin that faces the yoke, and the coil bobbin faces the yoke. 3. The solenoid device according to claim 2, wherein the surface is roughened so as to have a labyrinth seal function. 4. Locking protrusions for locking and fixing the winding start end and the winding end of the coil windings wound on these coil bobbins are provided protrudingly on the surface of the coil bobbin facing the yoke, and each of these locking protrusions has a 4. The solenoid device according to claim 1, further comprising a blade portion for cutting the coil winding. 5. 3. The solenoid device according to claim 2, wherein a socket to which a plug at one end of an electric cord is connected is integrally formed in the casing.