JPH09203476A - Solenoid valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic valve which can be used as a normally closed type or a normally open type only by changing the way of assembly without changing components. SOLUTION: An electromagnetic valve is composed of a sleeve 20 adapted to be seated on a valve seat 12a provided among fluid passages 18a, 18b, 18c for communicating an input port 15 with an output port 16, and serving as a movable member, a nonlinear spring 30 for urging the sleeve 20, an electromagnetic device fitted on the sleeve 20, for effecting a magnetic force. An electromagnetic device 40 comprises a stationary member composed of a core 40 and a yoke 50, and an electromagnetic coil 70 for generating a magnetic force. The core 40 and the yoke 50 can be assembled in different ways, and accordingly, when the assembly of the core 40 and the yoke 50 is changed so that the uring direction of the non-linear spring 30 is reversed, an air gap 24 defined between the sleeve 20 and the core 40 or the yoke 50 is positionally changed, thereby the attracting force for the sleeve 20 is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve device, and more particularly to a solenoid valve device that can be assembled as a normally closed or normally open solenoid valve according to the purpose of use.

[0002]

2. Description of the Related Art In recent years, an electromagnetic on-off valve that can be assembled as a normally closed or normally open electromagnetic on-off valve has been proposed. For example, in Japanese Unexamined Patent Publication (Kokai) No. 3-199788, as a two-way solenoid valve of the above type, the solenoid device and the valve portion are partially blocked so that the solenoid device portion can be shared and only the valve portion can be provided. A two-way solenoid valve has been proposed that can be replaced to manufacture either a normally closed type or a normally opened type.

Further, in an electromagnetic on-off valve, an inner return spring and an outer return spring are used to prevent a vibration and a vibration sound of liquid in an oil passage which occur when the valve is closed, and a shaft is provided with a predetermined distance. The inner return spring acts until it moves, and the outer return spring acts after the shaft has moved a specified distance. Japanese Patent Application Laid-Open No. 7-260027 proposes an electromagnetic opening / closing valve that is slowly closed.

[0004]

However, in the two-way solenoid valve proposed in Japanese Patent Laid-Open No. 3-199788, in the case of the normally closed type, a valve seat is formed on the outer base of the valve portion, and the normally open type is used. In this case, since the valve seat is formed on the inner base of the valve section, the structure of the valve section differs between the normally closed type and the normally open type, and separate parts are required, increasing the number of components and increasing the cost. Causes a problem that

Further, in the electromagnetic on-off valve proposed in Japanese Patent Laid-Open No. 7-260027, it is necessary to use two springs, an inner return spring and an outer return spring, and therefore two springs are accommodated. However, there is a problem in that the number of components is increased and the cost is increased. Also, since the inner return spring acts until the shaft moves a predetermined distance, and the outer return spring acts after the shaft moves a predetermined distance, the structure becomes complicated, and this kind of solenoid on-off valve can be manufactured easily and easily. There is a problem in that it is not possible and the cost increases.

Therefore, the present invention has been made in view of the above problems, and can be used as a normally closed type or a normally open type by changing the assembling method without changing the constituent parts, and The purpose of the present invention is to obtain an electromagnetic valve device that does not generate liquid vibration or vibration noise when the valve is closed.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a valve body which is seated on a valve seat provided in a flow passage which communicates an inflow port and an outflow port, and a biasing force which biases the valve body in a predetermined direction. An electromagnetic valve device comprising: an electromagnetic device including a magnetic field generating means and a magnetic coil that generates a magnetic force that operates a valve body against the biasing force of the biasing means. A member that changes the assembling direction of the biasing means so as to switch the action direction of the biasing force of the biasing means to the opposite direction and forms the magnetic path of the electromagnetic device so as to reverse the magnetic force of the electromagnetic device. Is to be used as a normally closed or normally open solenoid valve.

According to a second aspect of the present invention, the above-mentioned inflow port is formed in the axial direction of its axial center, the above-mentioned outflow port is formed in the radial direction of its outer peripheral portion, and the above-mentioned valve seat is provided in its flow direction. A cylindrical valve body having a cylindrical inner shaft formed in a part of the passage, and a cylindrical valve body fitted so as to be movable in the axial direction of the inner shaft is adopted as the above-mentioned valve body. Is arranged concentrically with the axial center of the electromagnetic valve so as to urge the cylindrical valve element, and is disposed on both sides of the electromagnetic coil as a constituent member of the electromagnetic device described above, and a magnetic path of a magnetic field generated from the electromagnetic coil. This is because the yoke and the core forming the above are formed, and the yoke and the core are formed in a shape that can be recombined.

According to a third aspect of the invention, the inner shaft is a stepped inner shaft having a large diameter portion, a medium diameter portion and a small diameter portion, and the valve seat is a medium diameter portion of the stepped inner shaft. It is formed between the large diameter portion and the large diameter portion, and the cylindrical valve element described above is fitted in the middle diameter portion so as to be movable in the axial direction of the stepped inner shaft. Further, in the invention described in claim 4, the above-mentioned biasing means uses a non-linear spring whose load increases as it contracts.

Further, according to the present invention, there is provided a valve body which is seated on a valve seat provided in a flow path communicating the inflow port and the outflow port, and a first urging means for urging the valve body in a predetermined direction. A movable member for displacing the valve body, a second urging means for urging the movable member in a predetermined direction, and a magnetic force for operating the movable member against the urging force of the second urging means. An electromagnetic valve device comprising an electromagnetic device including an electromagnetic coil for generating, wherein in the invention according to claim 5, the operation direction of the urging force of the second urging means is changed to the opposite direction. By changing the assembling direction of the second urging means and changing the components forming the magnetic path of the electromagnetic device so as to reverse the magnetic force of the electromagnetic device, it is used as a normally closed or normally open solenoid valve. I tried to get it.

According to a sixth aspect of the present invention, the above-mentioned inflow port is formed in the axial direction of its axis, and the above-mentioned outflow port is formed in the radial direction of its outer peripheral portion, and these inflow port and outflow port are formed. A valve chamber is formed between the first and second valve chambers, a valve seat is formed at a position facing the inflow port in the valve chamber, and the valve body is biased from the inflow port side to a position where the valve seat is seated on the valve seat. A base portion in which the biasing means is disposed, the movable member is formed of an inner shaft that is movably fitted in a through hole that is in communication with the valve chamber and is arranged in the axial direction of the axial center of the base portion, As a constituent member of the above-mentioned electromagnetic device, a yoke arranged on a side portion of the electromagnetic coil, a base portion, a plunger press-fitted to the inner shaft, and an inner peripheral surface of the base portion or an inner peripheral surface of the yoke are press-fitted to form the inner shaft. A guide body with a cylindrical step guide that guides It formed into a shape capable reclassified and plunger, in that so as to urge the plunger and disposing a second biasing means described above the guide member and the concentric.

In the invention according to claim 7, a flange portion having a drain hole is formed on the outer periphery of the base portion, and a valve seat is formed on the side wall facing the valve chamber with the outflow port of the base portion therebetween. A flange portion is formed on the inner shaft so as to come into contact with the valve seat formed on the side wall so that the inner shaft can be used as a duty valve. Further, claim 8
In the invention described in (3), the first urging means uses a non-linear spring whose load increases as it contracts.

[0013]

As described above, in the inventions according to claims 1 to 3, the assembling direction of the biasing means is changed so that the acting direction of the biasing force of the biasing means is changed to the opposite direction. By changing and changing the core and the yoke, which are the constituent members forming the magnetic path of the electromagnetic device, the air gap formed between the valve body and the yoke is formed between the valve body and the core. Alternatively, the air gap formed between the valve body and the core is formed between the valve body and the yoke.
Thus, when a magnetic field is generated by the electromagnetic device, the suction force from the yoke to the valve body is converted into the suction force from the core to the valve body, or the suction force from the core to the valve body is converted into the suction force from the yoke to the valve body. Therefore, it can be used both as a normally closed type and a normally open type.

Further, in the invention described in claims 5 to 7, the assembling direction of the second urging means is changed so as to change the acting direction of the urging force of the second urging means to the opposite direction. When the guide body and the plunger, which are the constituent members forming the magnetic path of the electromagnetic device, are recombined, the position of the air gap formed between the guide body and the plunger is from the side opposite to the base side to the base side or from the base side to the base side. Will be converted to the other side. As a result, when a magnetic field is generated by the electromagnetic device, the direction of the attraction force from the guide body with respect to the plunger is changed, so that it can be used as either a normally closed type or a normally open type.

Therefore, regardless of whether it is the normally closed type or the normally open type, all the components can be made common, and this type of solenoid valve device can be manufactured at low cost.

Further, in the inventions according to claims 4 and 8, since the biasing means or the first biasing means is a non-linear spring whose load increases as it contracts, the biasing means or the first biasing means moves quickly at the start of movement of the valve body. However, when the valve body is seated on the valve seat, the impact force at the time of seating is mitigated and the occurrence of impact noise, vibration, etc. can be prevented because the valve body moves slowly at the end of the movement.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First Embodiment FIG. 1 is a vertical cross-sectional view showing the overall configuration of the present embodiment when the solenoid valve device of the present invention is a spool type three-port two-position solenoid valve device, and FIG. FIG. 1 (b) shows a case of being assembled in a mold, and FIG.

As shown in these figures, the spool type three-port two-position solenoid valve device of the present embodiment is made of a non-magnetic material, and has a large diameter portion 10a and a medium diameter portion smaller than the large diameter portion 10a. Stepped inner shaft 10 having a small diameter portion 10c slightly smaller than the valve portion 10b.
A sleeve 20 made of a magnetic material and movably fitted to the valve portion 10b of the stepped inner shaft 10 to form a magnetic path; and a non-linear spring 30 for urging the sleeve 20 to move forward or backward. It has and.

The electromagnetic device constituting the electromagnetic valve device of the present embodiment is made of a magnetic material and has a stepped inner shaft 1.
A core 40 that is arranged on the outer peripheral portion of 0 and forms a magnetic path, and a stepped inner shaft 1 together with the core 40 that is made of a magnetic material
A yoke 50 that is arranged on the outer peripheral portion of 0 to form a magnetic path and serves as a case of an electromagnetic device, a bobbin 60 that is arranged in the yoke 50, and a bobbin 60 that is wound around and energized from a power source (not shown). And an electromagnetic coil 70 that generates a magnetic flux.

Further, a spacer 80 made of a nonmagnetic material is provided between the yoke 50 and the stepped inner shaft 10 or between the core 40 and the stepped inner shaft 10. The core 40 and the stepped inner shaft 10 are press-fitted between the inner shaft 10 and the inner shaft 10 to fix the space between them. Here, the inner end 81 of the spacer 80 serves as a valve seat on which the other end 22 of the sleeve 20 is seated.

Large diameter portion 10a of the stepped inner shaft 10
The large-diameter support portion 11 that supports the core 40 or the yoke 50 is disposed in the. An annular groove 12 and a step portion 13 are arranged at both ends of the valve portion 10b of the stepped inner shaft 10. Here, the one end portion 12a of the annular groove 12 serves as a valve seat on which the one end portion 21 of the sleeve 20 is seated. A spacer 80 is attached to the small diameter portion 10c of the stepped inner shaft 10.
The small-diameter support portion 14 that supports the The large diameter support portion 11 and the small diameter support portion 14 are formed such that the length L of the large diameter support portion 11 and the length L of the small diameter support portion 14 are equal.

Inside the stepped inner shaft 10, six holes 18a to 18f that form an oil passage are provided.
A first hole 18a extending axially from the outside of the axis of the large-diameter portion 10a to the valve portion 10b is provided.
The outer end portion of the hole 18 a of the above becomes the input port 15. A second hole 18b is provided from the surface of the large diameter portion 10a toward the inside in the radial direction. The end portion on the front surface side of the second hole 18b becomes the output port 16. Further, inside the stepped inner shaft 10, a third hole 18c that communicates with the second hole 18b from the end of the large-diameter support portion 11 and is parallel to the first hole 18a, and both ends of the annular groove 12 are provided. A fourth hole 18d that penetrates the portion and communicates with the first hole 18a is provided. Further, inside the stepped inner shaft 10, there is provided a fifth hole 18e extending axially from the outside of the axis of the small diameter portion to the valve portion 10b, and the outside of the fifth hole 18e. The end becomes the discharge port 17. In addition, it penetrates both ends of the step 13 to
The sixth hole 18f communicating with the hole 18e is provided.

The sleeve 20 constitutes a movable member, and both end portions 21 and 22 thereof constitute a valve portion which acts as a valve. An annular protrusion 23 for locking the non-linear spring 30 is provided at the center of the sleeve 20.
The length of the sleeve 20 is one end 12a of the annular groove 12 and one end 1 of the step portion 13 formed at both ends of the valve portion 10b.
The length is shorter than the length between 3a. This allows
When the sleeve 20 is loosely fitted to the outer peripheral portion of the valve portion 10b and is urged by the non-linear spring 30, air between the tip portion 53a of the inner cylindrical portion 53 of the yoke 50 and the end portion 21 or 22 of the sleeve 20, which will be described later, is generated. Gap 24
Or 25 is formed.

The non-linear spring 30 is made of a non-magnetic spring material, and has a spiral shape so that the diameter of the winding start portion of the one end 31 is small and the diameter of the winding end portion of the other end 32 is large. It is rolled. Therefore, FIG.
As shown by the solid line (the dotted line in FIG. 4 shows the case of a linear spring), a spiral spring is used in which the load g increases as the stroke (contraction length) s increases. The load is set to be g ₁ when the stroke is s ₁ , and the load is set to be g ₂ when the stroke is s ₂ when the stroke is contracted to the maximum. One end 31 of the non-linear spring 30 is locked to the annular projection 23 of the sleeve 20, and the other end 32 is locked to the tip portion 53a of the inner tubular portion 53 of the yoke 50.

The core 40 has a cylindrical portion 41 and a flange portion 42 formed on one end surface thereof. The cylindrical portion 41 is formed to be longer than the length L of the large-diameter support portion 11 and the small-diameter support portion 14, and a step portion 43 having a length extending from the tip end portion thereof into the large-diameter support portion 11 and the small-diameter support portion 14. Is formed. Therefore, a portion longer than the length L of the large-diameter support portion 11 and the small-diameter support portion 14 of the cylindrical portion 41 acts as a guide of the sleeve 20, and reaches the inside of the large-diameter support portion 11 and the small-diameter support portion 14 of the step portion 43. The extending portion becomes the side gap 26 for securing the oil passage.

Further, the thickness of the cylindrical portion 41 is formed to be equal to the thickness of the inner cylindrical portion 53 of the yoke 50.
The core 40 is press-fitted into the large-diameter support portion 11 of the stepped inner shaft 10 or press-fitted into the small-diameter support portion 14 through the spacer 80 to form a magnetic path. The core 40
The rough shape is the same when used as a normally open valve and as a normally closed valve, but when used as a normally closed valve, the inner surface of the cylindrical portion 41 has a stepped inner shaft 10 A groove 44 communicating with the third hole 18c is provided.

The yoke 50 is in the shape of a double cylinder having a bottom portion 51, and has an outer cylindrical portion 52 extending from one end of the bottom portion 51 and an outer cylindrical portion 52 extending from the other end of the bottom portion 51 and shorter than the outer cylindrical portion 52. And the formed inner cylindrical portion 53. A crimp portion 54 is provided at an end of the outer cylindrical portion 52, and the yoke 50 is crimped by crimping the crimp portion 54.
And the core 40 are fixed to each other. The inner cylindrical portion 53 is formed to have a length equal to the length L of the large diameter support portion 11 and the small diameter support portion 14. Further, the thickness of the inner cylindrical portion 53 is formed to be equal to the thickness of the cylindrical portion 41 of the core 40.

The yoke 50 has the same rough shape when used as a normally open valve and as a normally closed valve, but when used as a normally open valve, the inner cylindrical portion 53 is used.
On the inner peripheral surface of the third hole 18 of the stepped inner shaft 10
A groove 55 communicating with c is provided. Inside the yoke 50, a bobbin 60 is wound with an electromagnetic coil 70 that generates a magnetic flux when energized from an external power source (not shown).
Is arranged. The yoke 50 serves as a case for accommodating the bobbin 60, and also forms a magnetic path of the magnetic field generated by the electromagnetic coil 70. An annular groove 61 is arranged on the outer peripheral portion of the bobbin 60, and an O-ring 63 is arranged in the annular groove 61. The O-ring 63 is liquid-tight between the bobbin 60 and the yoke 50 and between the bobbin 60 and the core 40. To be sealed.

As described above, the cylindrical portion 41 of the core 40 is formed longer than the length L of the large-diameter support portion 11 and the small-diameter support portion 14, and the large-diameter support portion 11 and the small-diameter support portion are provided from the tip end thereof. A step portion 43 having a length extending to the inside of the portion 14 is formed. The inner cylindrical portion 53 of the yoke 50 is formed to have a length equal to the length L of the large diameter support portion 11 and the small diameter support portion 14. Further, the inner cylindrical portion 53 of the yoke 50 and the cylindrical portion 41 of the core 40 are formed to have the same thickness. Therefore, even if the core 40 is arranged on the left side and the yoke 50 is arranged on the right side as shown in FIG.
Alternatively, as shown in FIG. 1B, even if the core 40 is arranged on the right side and the yoke 50 is arranged on the left side, the yoke 50 and the core 4 are
0 can be rearranged.

The method of assembling the respective components when the 3-port 2-position solenoid valve of the present embodiment configured as described above is used as a normally closed 3-port 2-position solenoid valve will be described below. First, the large-diameter support portion 1 of the stepped inner shaft 10 in which the plurality of holes 18a to 18f forming the oil passage are arranged.
The core 40 having the groove 44 formed in 1 is press-fitted from the flange 42 side, and the sleeve 20 is loosely fitted in the valve 10b to prepare the first assembly. On the other hand, the bobbin 60 wound with the electromagnetic coil 70 is inserted into the yoke 50 in which the groove portion 55 is not formed, and the spacer 80 is press-fitted into the inner peripheral portion of the inner cylindrical portion 53 of the yoke 50 to prepare the second assembly. To do.

A non-linear spring is dropped into the second assembly with the winding end 32 as the leading end, and the small diameter support portion 1 of the first assembly is attached to the inner peripheral surface of the spacer 80 of the second assembly.
4 is press-fitted, the caulked portion 54 of the yoke 50 is attached to the core 40.
By caulking, the normally closed 3-port 2-position solenoid valve shown in FIG. 1A is assembled. At this time, the one end portion 31 of the non-linear spring 30 on the winding start side of the small diameter has the sleeve 2
The non-linear spring 30 has the other end portion 32 on the winding end side of the non-linear spring 30 which is locked by the annular protrusion 23 of the yoke 50.
And is locked at the corner of the bobbin 60.

The operation of the normally closed three-port two-position solenoid valve shown in FIG. 1 (a) assembled in this manner will be described. In a non-energized state in which the electromagnetic coil 70 is not energized from an external power source (not shown), the end portion 2 that serves as the valve portion of the sleeve 20.
No. 1 is urged by the non-linear spring 30 (the stroke length at this time is s ₁ and its load is g _{1 as} shown by the solid line in FIG. 4) and the annular portion of the valve portion 10 b of the stepped inner shaft 10 is annular. Since it is pressed against the one end 12a of the protrusion 12, the input port 15 and the output port 16 are in a closed state. On the other hand, the end portion 2 of the sleeve 20
2 and the end 81 of the spacer 80 between the air gap 24
Is formed, the output port 16 has a second hole 18
b, the third hole 18c, the side gap 26, the surface of the stepped portion 43 of the core 40 and the outer surface of the sleeve 20, the bobbin 6
0 and the outer surface of the sleeve 20 communicate with the discharge port 17 through the air gap 24, the step portion 13, the sixth hole 18f, and the fifth hole 18e, and the oil flows from the output port 16 to the discharge port 17. .

Here, one end 31 of the small-diameter winding start side of the non-linear spring 30 is locked to the annular projection 23 of the sleeve 20, and the other end 32 of the large-diameter winding end side of the non-linear spring 30 is formed. Since the yoke 50 and the bobbin 60 are locked at the corners, the air gap 24 is not blocked by the non-linear spring 30, and a sufficient oil passage can be secured. In general, the colder the oil, the more rapidly the viscosity of the oil rises. However, if the non-linear spring 30 is arranged as described above, the oil passage can be sufficiently secured, and the low temperature Even at times, it is possible to maintain the same performance as at room temperature.

From this state, when the electromagnetic coil 70 is energized from an external power source (not shown), the electromagnetic coil 70 generates a magnetic flux. The generated magnetic flux passes through the yoke 50 made of a magnetic material, the core 40, and the sleeve 20, and passes through the air gap 2
A magnetic path is formed that returns to the yoke 50 via the magnetic path 4. Then, a suction force is generated between the end portion 22 of the sleeve 20 between the air gaps 24 and the end portion 53a of the inner cylindrical portion 53 of the yoke 50, and the sleeve 20 resists the biasing force of the nonlinear spring 30 and the yoke 50. Is sucked by the end portion 53a of the inner cylindrical portion 53 of the sleeve 20 and the one end portion 21 of the sleeve 20 and the valve portion 10
A gap 25 is formed between the one ends 12a of the annular protrusions 12 of b. At this time, the stroke length of the non-linear spring 30 is the maximum s ₂ and the load is the maximum g ₂ (see the solid line in FIG. 4).

As a result, the passage between the output port 16 and the discharge port 17 is closed. On the other hand, input port 15
Is the first hole 18a, the fourth hole 18d, the annular groove 12, the gap 25, the gap 26, the groove portion 44 of the core 40, the third hole 18
The oil flows from the input port 15 to the output port 16 through the second hole 18b and the second hole 18b.

As shown by the solid line in FIG. 4, the stroke of the non-linear spring 30 contracts from s ₁ to s _2, so that the load thereof increases non-linearly from g ₁ to g ₂ .
As a result, the inner cylindrical portion 5 of the yoke 50 of the sleeve 20 is
3 moves to the end portion 53a side at a high speed, and at the end of the movement of the inner cylindrical portion 53 of the yoke 50 of the sleeve 20 to the end portion 53a side, moves slowly, and the other end portion 22 of the sleeve 20 becomes a spacer. Even when seated on the valve seat at the inner end portion 81 of 80, the impact force at the time of seating is mitigated, the oil hammer is mitigated, and the generation of impact noise and vibration can be prevented.

On the contrary, when the energization of the electromagnetic coil 70 is stopped from this state, the non-linear spring 30 returns its stroke from s ₂ to s _{1 as} shown by the solid line in FIG. It decreases linearly from ₂ to g ₁ from non-linear. Thereby, the end portion 1 of the annular groove 12 of the sleeve 20 is
2a side is moved at a high speed at the start of the movement, and at the end of the movement of the annular groove 12 of the sleeve 20 toward the end 12a side, it is moved at a slow speed.
Even when the second end 12a is seated on the valve seat, the impact force at the time of seating is mitigated, the oil hammer is mitigated, and impact noise and vibration can be prevented.

Next, a method of assembling the respective components when the 3-port 2-position solenoid valve of the present embodiment configured as described above is used as a normally open 3-port 2-position solenoid valve will be described below. First, the plurality of holes 18a to 18 forming the oil passage
The f is press-fitted into the large-diameter support portion 11 of the stepped inner shaft 10 from the bottom 51 side of the yoke 50 in which the groove 55 is formed together with the bobbin 60 around which the electromagnetic coil 70 is wound. Next, along the outer peripheral surface of the valve portion 10b, the other end portion 32 of the non-linear spring 30 on the winding end side is inserted and the one end portion 31 on the winding start side is inserted on the rear side. Then, the sleeve 20 is loosely fitted along the outer peripheral surface of the valve portion 10b. After that, after the core 40 in which the groove portion 44 is not formed is press-fitted along the outer peripheral surface of the bobbin 60,
Small-diameter support portion 14 and core 40 of stepped inner shaft 10
A spacer 80 is press-fitted between the two, and the spool-type 3-port 2-position normally open solenoid valve shown in FIG. 1B is assembled. At this time, the one end portion 3 of the non-linear spring 30 on the winding start side of the small diameter
1 is locked to the annular projection 23 of the sleeve 20, and the other end 32 of the large diameter winding end side of the nonlinear spring 30 is locked to the corners of the yoke 50 and the bobbin 60.

The operation of the normally open three-port two-position solenoid valve shown in FIG. 1 (b) thus assembled will be described. In a non-energized state in which the electromagnetic coil 70 is not energized from an external power source (not shown), the end portion 2 which serves as the valve portion of the sleeve 20.
Since 2 is biased by the non-linear spring 30 and is pressed against the inner end portion 81 serving as the valve seat of the spacer 80, the output port 16 and the discharge port 17 are closed. On the other hand, the end portion 21 of the sleeve 20 and the valve portion 10
Since the air gap 25 is formed between the end portions 12a of the annular groove 12 of b, the input port 15 has the first hole 18
a, the fourth hole 18d, the annular groove 12, the air gap 25,
Groove 55 of yoke 50, third hole 18c, second hole 18
The oil passes through b and communicates with the output port 16, and oil flows from the input port 15 to the output port 16.

Here, one end 31 of the small-diameter winding start side of the non-linear spring 30 is locked to the annular projection 23 of the sleeve 20, and the other end 32 of the large-diameter winding end side of the non-linear spring 30 is a yoke. Since the air gap 25 is not blocked by the non-linear spring 30 because it is locked at the corners of the bobbin 50 and the bobbin 60, it is possible to secure a sufficient oil passage as in the normally closed type described above. Therefore, it is possible to maintain the same performance as that at room temperature even at low temperature.

From this state, when the electromagnetic coil 70 is energized from an external power source (not shown), the electromagnetic coil 70 generates a magnetic flux. The generated magnetic flux passes through the yoke 50 made of a magnetic material, the core 40, and the sleeve 20, and passes through the air gap 2
A magnetic path is formed which returns to the yoke 50 via the magnetic path 5. Then, a suction force is generated between the end portion 21 of the sleeve 20 between the air gaps 25 and the tip end portion 53a of the inner cylindrical portion 53 of the yoke 50, and the sleeve 20 is loosely fitted in the valve portion 10b. Resists the urging force of the non-linear spring 30, and the tip portion 53 of the inner cylindrical portion 53 of the yoke 50.
a. In addition, the nonlinear spring 3 at this time
The stroke length of 0 is the maximum s ₂ and the load is the maximum g ₂ (see the solid line in FIG. 4).

As a result, the air gap 25 is closed by the one end 21 of the sleeve 20, and the space between the input port 15 and the output port 16 is closed. Meanwhile, the sleeve 20
An air gap 24 is formed between the other end 22 of the spacer 80 and the inner end 81 of the spacer 80, and the air gap 24 causes the output port 16 to have the second hole 18b, the third hole 18c, and the groove 55 of the yoke 50. , Between the bobbin 60 and the sleeve 20,
It communicates with the discharge port 17 through the air gap 24, the step portion 13, the sixth hole 18f, and the fifth hole 18e, and the oil flows from the output port 16 to the discharge port 17.

Here, as shown by the solid line in FIG. 4, the stroke of the non-linear spring 30 contracts from s ₁ to s _2, so the load thereof increases non-linearly from g ₁ to g ₂ .
As a result, the sleeve 20 moves fast at the start of the movement toward the end 12a of the annular groove 12 and moves slowly at the end of the movement of the sleeve 20 toward the end 12a of the annular groove 12, and the one end of the sleeve 20 moves. Even when 21 is seated on the valve seat of the end 12a of the annular groove 12, the impact force at the time of seating is mitigated, the oil hammer is mitigated, and the generation of impact noise and vibration can be prevented.

On the contrary, when the energization of the electromagnetic coil 70 is stopped from this state, the nonlinear spring 30 returns its stroke from s ₂ to s _{1 as} shown by the solid line in FIG. It decreases linearly from ₂ to g ₁ from non-linear. As a result, when the sleeve 20 starts moving toward the inner end portion 81 of the spacer 80, the sleeve 20 moves quickly, and the sleeve 2
0 will move slowly at the end of the movement of the spacer 80 toward the inner end 81 side, and even if the other end 22 of the sleeve 20 is seated on the valve seat of the inner end 81 of the spacer 80, the impact force at the time of seating Is reduced, the oil hammer is reduced, and impact noise and vibration can be prevented.

As described above, in the present embodiment, the normally-closed type or normally-open type electromagnetic field can be obtained only by reversing the positional relationship between the core 40 and the yoke 50 and reversing the biasing direction of the non-linear spring 30. It can be used as a valve. Further, it becomes possible to make all the constituent parts common regardless of whether they are the normally closed type or the normally open type. However, in the normally closed type, it is necessary to form the groove portion 55 in the yoke 50 and in the normally open type, the groove portion 44 is formed in the core 40. However, the original shape is the same. The valve device can be manufactured at low cost. Further, in the present embodiment, both end portions 21 and 22 of the sleeve 20 serve as the valve seats.
Since the valve portion comes into surface contact with the end portion 12a of the above or the end portion 81 of the spacer 80, a solenoid valve device having a large opening area can be obtained.

Embodiment 2 FIG. 2 is a vertical cross-sectional view showing the overall construction of the present embodiment when the solenoid valve device of the present invention is a ball type 3 port 2 position solenoid valve device, and FIG. Shows the case of being assembled in the normally closed type, and FIG. 2 (b) shows the case of being assembled in the normally open type. As shown in these drawings, the ball-type three-port two-position electromagnetic valve device of the present embodiment is cylindrical and made of a magnetic material. The second through hole 102 communicating with the first through hole 101 is provided, and the base 100 having a flange portion 103 around the second through hole 102 and forming a valve portion is provided.

A space portion 10 in which both ends of the first through hole 101 of the base 100 are cut off in a substantially conical shape at the tip portion thereof.
4 and 105 are formed. A substantially conical side wall 104a at the tip of the space 104 serves as a valve seat, a ball valve 106 seated on the valve seat, a non-linear spring 107 serving as a first urging means for urging the ball valve, and the non-linear spring 107. By disposing the cylindrical lid 108 having the opening 108a as the seat of the spring 107 in the space portion 104, the space portion 104 becomes a valve chamber portion. On the other hand, on the peripheral wall on the side of the space portion 105, the annular protrusion 10 protruding outward from the flange portion 103.
9 are provided. The base 100 constitutes a valve portion and also forms a magnetic path to be a part of an electromagnetic device. The opening 108a serves as an input port, and both ends of the second through hole 102 serve as output ports.

Here, the non-linear spring 107 is formed of a non-magnetic spring material like the non-linear spring 30 of the first embodiment, and one end portion 1 of the non-linear spring 107 is formed.
The winding start portion of 07a has a small diameter, and the other end portion 107b has a winding end that has a large diameter. Therefore, as shown by the solid line in FIG. 4, a spiral spring is used in which the load g increases as the stroke (contraction length) s increases, and the load when the stroke during installation is s ₁ g ₁ and is set to be the load when the stroke shrinks the maximum becomes s ₂ is set to be g _2. One end 107a of the non-linear spring 107 is locked to the ball valve 106, and the other end 107b is locked to the wall surface of the cylindrical lid 108 to constantly urge the ball valve 106.

On the side surface of the flange portion 103 of the base 100, the main portion of the electromagnetic device of this electromagnetic valve device is arranged.
The main part of this electromagnetic device is made of a magnetic material and is a base 100.
A yoke 110 arranged on the outer peripheral portion of the flange portion 103 and serving as a case of a main part of the present electromagnetic device, a bobbin 120 arranged in the yoke 110, a bobbin 120 wound around, and energized from a power source (not shown). As a result, the electromagnetic coil 130 that generates magnetic flux, and the first through hole 1 of the base 100 that is made of a non-magnetic material and is arranged in the yoke 110 are provided.
01 and movably inserted into the inner shaft 140.

Here, like the yoke 50 of the first embodiment, the yoke 110 has a double cylindrical body shape having a bottom portion 111, and an outer cylindrical portion 112 extending from one end portion of the bottom portion 111. And an inner cylindrical portion 113 extending from the other end of the bottom portion 111 and formed shorter than the outer cylindrical portion 112.
And A caulking portion 114 is provided at the end of the outer cylindrical portion 112, and the base 100 and the yoke 110 are fixed to each other by caulking the caulking portion 114.

The main part of the electromagnetic device is cylindrical and is made of a magnetic material and is loosely fitted to the outer peripheral surface of the inner shaft 140 and is press-fitted to the inner peripheral surface of the annular protrusion 109 of the base 100 or the inner peripheral surface of the yoke 110. Inner shaft 1
A guide body 150 that guides the movement of 40, and a cylindrical non-magnetic material that are press-fitted into the outer peripheral surface of the inner shaft 140 and that play in the inner peripheral surface of the yoke 110 or the inner peripheral surface of the annular protrusion 109 of the flange portion 103. It includes a plugger 160 to be fitted and a stopper 170 made of a non-magnetic material and press-fitted into the inner peripheral surface of the yoke 110 and loosely fitted to the outer peripheral surface of the inner shaft 140.

Here, a step 151 is formed on the outer peripheral surface of the guide body 150, and a coil spring 180 serving as a second urging means is inserted into the step 151 and the plunger 1 is inserted.
60 is elastically biased to guide body 150 and plunger 160.
And an air gap 190 is formed between them. Further, the arrangement relationship between the guide body 150 and the plunger 160 is opposite between when the solenoid valve device of the present embodiment is used as a normally closed type and when it is used as a normally open type, and the bias of the coil spring 180 is urged. It is assembled so that the direction is reversed.

Next, each assembling method when the solenoid valve device of the present embodiment is used as a normally closed type or a normally open type will be described. When installing as a normally closed type, first, base 1
Side wall 104a having a substantially conical shape at the tip of the space portion 104 of 00
The ball valve 106 is seated on the non-linear spring 107.
The cylindrical lid 108 in which is arranged is press-fitted into the space 104 to form a first assembly. Here, the nonlinear spring 107 is
As shown by the solid line in FIG. 4, the stroke is s ₁ and the load is set so as to be g ₁ .

On the other hand, after the guide body 150 is loosely fitted to the outer peripheral surface of the inner shaft 140 and the coil spring 180 is inserted into the outer peripheral surface of the step 151 of the guide body 150, the plunger 160 is attached to the outer peripheral surface of the inner shaft 140. Press fit. When the plunger 160 is press-fitted onto the outer peripheral surface of the inner shaft 140, the inner shaft 1
When the inner shaft 140 is inserted into the first through hole 101 of the base 100, the tip end of the inner shaft 140 is moved to the ball valve 106.
Press in so that it will come into contact with. A yoke 1 containing a bobbin 120 around which an electromagnetic coil 130 is wound.
After being inserted into 10, the stopper 170 is press-fitted into the inner peripheral surface of the yoke 110 to form a second assembly.

Next, the guide body 150 of this second assembly
The outer peripheral surface of is pressed into the inner peripheral surface of the annular protrusion 109 of the first assembly. At this time, the plunger 160 is biased by the coil spring 180 in the direction opposite to the direction toward the ball valve 106 side to form the air gap 190.
With the movement of, the tip end of the inner shaft 140 into which the plunger 160 is press-fitted comes into contact with the ball valve 106. Then, by crimping the crimp portion 114 of the yoke 110, the ball-type 3-port 2 shown in FIG.
A position normally closed solenoid valve device is assembled.

When this ball type three-port two-position solenoid valve device is assembled as the normally open type shown in FIG. 2B, the guide body 150 is loosely fitted to the outer peripheral surface of the inner shaft 140, and the guide body 150 is stepped. After inserting the coil spring 180 into the outer peripheral surface of the portion 151, the plunger 160 is press-fitted into the outer peripheral surface of the inner shaft 140, and the insertion direction of the inner shaft 140 into the first through hole 101 of the base 100 is the normally closed type described above. When the inner shaft 140 is inserted into the first through hole 101 of the base 100 when the plunger 160 is press-fitted onto the outer peripheral surface of the inner shaft 140, the tip end portion of the inner shaft 140 is opposite to the case where the inner shaft 140 is assembled. Presses the ball valve 106 so that the ball valve 106 separates from the valve seat of the side wall 104a (at this position Nonlinear spring 107 becomes a contracted state to the maximum, as indicated by the solid line in FIG. 4, the stroke s _2, and the because the load is only different in that press-fitting so that a g _2), Detailed description thereof will be omitted.

Ball type 3 port 2 constructed as described above
The operation of the position solenoid valve device will be described with reference to FIG. First, the case of the normally closed type as shown in FIG. In a non-energized state in which the electromagnetic coil 130 is not energized from an external power source (not shown), the plunger 160 is biased to the right in FIG. 2A by the coil spring 180. Therefore, the inner shaft 140 into which the plunger 160 is press-fitted is pressed. Similarly, the ball valve 106 is seated on the valve seat of the side wall 104a of the base 100 by being biased rightward. Therefore, the oil does not flow from the opening 108a serving as the input port to the second through hole 102, and the second port serving as the output port does not flow.
Oil flows only between the ends of the through holes 102.

From this state, when the electromagnetic coil 130 is energized by an external power source (not shown), the electromagnetic coil 130 generates a magnetic flux. The generated magnetic flux passes through the yoke 110 made of a magnetic material, the flange portion 103 of the base 100, the guide body 150, the air gap 190, the plunger 160, and returns to the yoke 110 to form a magnetic path. Then, a suction force is generated between the end of the guide body 150 and the end of the plunger 160 between the air gaps 190, and the plunger 160
Is attracted to the end portion of the guide body 150 against the biasing force of the coil spring 180, and the inner shaft 140 into which the plunger 160 is press-fitted moves to the left in FIG. 2A. As a result, the ball valve 106 is urged in the direction opposite to the urging force of the non-linear spring 107, and the non-linear spring 107 contracts to the maximum, and the stroke is s ₂ and the load is g as shown by the solid line in FIG. It becomes the state of ₂ . Then, the opening 108a serving as the input port and both ends of the second through hole 102 serving as the output port communicate with each other, and the oil flows from the input port to the output port.

Here, the nonlinear spring 107 is shown in FIG.
As shown by the solid line in, the stroke contracts from s ₁ to s _2, so the load increases non-linearly from g ₁ to g ₂ ,
When the inner shaft 140 starts moving toward the ball valve 106, the inner shaft 140 moves faster. On the contrary, when the energization of the electromagnetic coil 130 is stopped from this state, the stroke of the non-linear spring 107 returns from s ₂ to s ₁ , and the spring force linearly decreases from g ₂ to g ₁ . The ball valve 106 moves slowly when the valve seat of the side wall 104a is seated, and the ball valve 106 moves to the side wall 104a.
Even when the valve seat of a is seated, the impact force at the time of seating is mitigated, the oil hammer is mitigated, and the occurrence of impact noise and vibration can be prevented.

On the other hand, in the case of the normally open type as shown in FIG. 2B, when the electromagnetic coil 130 is not energized from an external power source (not shown), the plunger 160 is moved by the coil spring 180 so that the plunger 160 shown in FIG. ), The inner shaft 140 into which the plunger 160 is press-fitted is also biased to the left, and the ball valve 106 is separated from the valve seat of the side wall 104 a of the base 100. Therefore, the oil flows from the opening 108a serving as the input port through the second through hole 102 to both ends of the second through hole 102 serving as the output port. At this time, the nonlinear spring 107 is in the maximum contracted state, and its stroke is s ₂ and its load is g _{2 as} shown by the solid line in FIG.

From this state, when the electromagnetic coil 130 is energized from an external power source (not shown), the electromagnetic coil 130 generates a magnetic flux. The generated magnetic flux passes through the yoke 110 made of a magnetic material, the flange portion 103 of the base 100, the plunger 160, the air gap 190, the guide body 150, and returns to the yoke 110 to form a magnetic path. Then, a suction force is generated between the end of the guide body 150 and the end of the plunger 160 between the air gaps 190, and the plunger 160
Is attracted to the end of the guide body 150 against the urging force of the coil spring 180, and the inner shaft 140 into which the plunger 160 is press-fitted moves to the right in FIG. 2B. As a result, the non-linear spring 107 biases the ball valve 106 so that the ball valve 106 is seated on the valve seat of the side wall 104a, and the opening 108 serving as an input port is formed.
The a and the second through hole 102 are closed. On the other hand, since both ends of the second through hole 102 that serves as an output port communicate with each other, oil will flow between the output ports.

Here, since the stroke of the non-linear spring 107 returns from s ₂ to s ₁ , its spring force decreases linearly from g ₂ to g _1, and therefore the ball valve 10
6 moves slowly when the valve seat of the side wall 104a is seated, and even if the ball valve 106 is seated on the valve seat of the side wall 104a, the impact force at the time of seating is relaxed and the oil hammer is alleviated.
The impact noise and vibration can be prevented.

As described above, in the present embodiment, the ball valve 106 is used as the valve element, and the ball valve 1
Since 06 is accommodated in the space 104, it is not affected by the inflow pressure of oil flowing from the input port, and the load of the nonlinear spring 107 can be set small. Therefore, the plunger 160
It becomes possible to reduce the suction force acting on the air gap 190, and it becomes unnecessary to easily manage the air gap 190, and the productivity of this type of solenoid valve device is improved.

Embodiment 3 FIG. 3 is a longitudinal sectional view showing the overall construction of the third embodiment in which the solenoid valve device of the present invention is a 5-port 3-position solenoid valve device. Shows the case where it is assembled in the normally closed type, and FIG. 3B shows the case where it is assembled in the normally open type. Here, since the same symbols as those in FIG. 2 represent the same names, the description thereof will be omitted. 3 is different from FIG. 2 in that the inner shaft 145 is provided with a flange portion 146 so that the solenoid valve device can be used as a duty valve, and that the space portion 105 of the base 100 is substantially conical. The side wall 105a having a circular shape is used as a valve seat, and the contact portion of the flange portion 146 of the inner shaft 145 with the side wall 105a is used as a valve portion.
The drain hole 103a is formed in the flange portion 103 of the base 100.
And the outer end of the drain hole 103a is used as a discharge port.

Since this solenoid valve device is assembled in the same manner as in the second embodiment described above, its explanation is omitted. The operation will be briefly described. As shown in FIG. 3A, in the case of the normally closed type, when the electromagnetic coil 130 is not energized, the ball valve 106 is seated on the valve seat of the side wall 104 a of the space 104 and the flange of the inner shaft 145. Since the valve portion of the portion 146 is not in contact with the side wall 105a of the space portion 105, the output ports communicate with each other and the output port communicates with the discharge port, and oil flows between the output ports and from the output port to the discharge port.

On the other hand, when the electromagnetic coil 130 is energized, a suction force acts between the air gaps 190, the inner shaft 140 moves to the ball valve 106 side, and the ball valve 106 moves to the side wall 104a of the space 104. The flange portion 146 of the inner shaft 145 moves away from the valve seat.
The valve portion of the above seats on the valve seat of the side wall 105a of the space portion 105. As a result, the input port and the output port communicate with each other and the output port and the discharge port are closed, so that oil flows between the output ports and from the input port to the output port.

As shown in FIG. 3B, in the case of the normally open type,
When the electromagnetic coil 130 is not energized, the ball valve 10
6 is separated from the valve seat of the side wall 104a of the space portion 104, and the valve portion of the flange portion 146 of the inner shaft 145 is seated on the valve seat of the side wall 105a of the space portion 105. The ports communicate with the output ports, and oil flows between the output ports and from the input ports to the output ports.

On the other hand, when the electromagnetic coil 130 is energized, the suction force acts between the air gaps 190, and the inner shaft 140 moves to the side opposite to the ball valve 106, so that the ball valve 106 moves in the space 104. The valve portion of the flange portion 146 of the inner shaft 145 is separated from the valve seat of the side wall 105a of the space portion 105 while being seated on the valve seat of the side wall 104a. As a result, the input port and the output port are closed and communicated between the output ports and from the output port to the discharge port, so that oil flows between the output ports and from the output port to the discharge port.

In the first and second embodiments described above, an example in which the electromagnetic valve device of the present invention is used as an electromagnetic opening / closing valve device has been described. However, in the electromagnetic valve device of the present invention, the electromagnetic coil has a predetermined duty ratio. By energizing the pulse current of, it can be used also as a duty valve.

[Brief description of drawings]

1 is a spool-type 3-port 2 solenoid valve device of the present invention.
It is a longitudinal cross-sectional view showing the overall configuration of the first embodiment of the position solenoid valve device.

FIG. 2 is a vertical cross-sectional view showing an overall configuration of a second embodiment in which the solenoid valve device of the present invention is a ball-type three-port two-position solenoid valve device.

FIG. 3 is a vertical cross-sectional view showing an overall configuration of a third embodiment in which a solenoid valve device of the present invention is a ball type 5-port 4-position solenoid valve device.

FIG. 4 is a diagram showing stroke-load characteristics of the nonlinear spring of the present invention.

[Explanation of symbols]

10, 140, 145 ... Inner shaft, 10a ... Large diameter portion, 10b ... Valve portion, 10c ... Small diameter portion, 15 ... Input port (inlet), 16 ... Output port (outlet), 17 ...
Discharge port, 20 ... Sleeve (movable member), 30 ... Non-linear spring (biasing means), 40 ... Core (fixed member),
50, 110 ... Yoke (fixing member), 60, 120 ... Bobbin, 70, 130 ... Electromagnetic coil, 80 ... Spacer, 1
00 ... Base, 103 ... Flange (fixing member), 10
6 ... Ball valve, 107 ... Non-linear spring (first urging means), 150 ... Guide body (fixed member), 160 ... Plunger (movable member), 170 ... Stopper, 180 ... Coil spring (urging means, second) Biasing means)

Claims (8)

[Claims] 1. A valve body seated on a valve seat provided in a flow path communicating the inlet and the outlet, a biasing means for biasing the valve body in a predetermined direction, and a biasing means. An electromagnetic valve device including an electromagnetic device including an electromagnetic coil that generates a magnetic force that operates the valve body against the biasing force of the biasing means, and the direction of action of the biasing force of the biasing means is switched to the opposite direction. Used as a normally-closed type or normally-open type solenoid valve by changing the assembling direction of the biasing means and changing the components forming the magnetic path of the electromagnetic device so as to reverse the magnetic force of the electromagnetic device. An electromagnetic valve device characterized in that it can be operated. 2. A columnar shape in which the inflow port is formed in the axial direction of its axis, the outflow port is formed in the radial direction of its outer peripheral portion, and the valve seat is formed in a part of its flow path. An inner shaft is provided, and a cylindrical valve body fitted so as to be movable in the axial direction of the inner shaft is adopted as the valve body, and the urging means is arranged concentrically with the axial center of the inner shaft. A cylindrical valve body is biased, and the yoke and the core are arranged on both sides of the electromagnetic coil as a constituent member of the electromagnetic device, and the cylindrical valve body is arranged. The solenoid valve device according to claim 1, wherein the solenoid valve device is formed in a shape that can be rearranged. 3. The inner shaft is a stepped inner shaft having a large diameter portion, a medium diameter portion and a small diameter portion, and the valve seat is formed between the medium diameter portion and the large diameter portion of the stepped inner shaft. The solenoid valve device according to claim 2, wherein the cylindrical valve element is fitted in the intermediate diameter portion so as to be movable in the axial direction of the stepped inner shaft. 4. The solenoid valve device according to claim 1, wherein the urging means is a non-linear spring having a larger load as the urging means contracts. 5. A valve body seated on a valve seat provided in a flow path communicating between the inlet and the outlet, a first urging means for urging the valve body in a predetermined direction, and the valve. A movable member that displaces the body, a second biasing unit that biases the movable member in a predetermined direction, and an electromagnetic force that generates a magnetic force that operates the movable member against the biasing force of the second biasing unit. An electromagnetic valve device comprising an electromagnetic device including a coil, wherein the assembling direction of the second urging means is changed so as to change the acting direction of the urging force of the second urging means to the opposite direction, and An electromagnetic valve device, wherein constituent members forming a magnetic path of the electromagnetic device are changed so as to reverse the magnetic force of the electromagnetic device so that the electromagnetic device can be used as a normally closed or normally open electromagnetic valve. 6. The inlet is formed in the axial direction of its axis, the outlet is formed in the radial direction of its outer peripheral portion, and a valve chamber is formed between the inlet and the outlet. A base portion in which the valve seat is formed at a position facing the inflow port in the valve chamber, and a first urging means for urging the valve body from the inflow port side is arranged at a position to be seated on the valve seat. The movable member is formed by an inner shaft that is movably fitted in a through hole that is arranged in communication with the valve chamber and that is arranged in the axial direction of the axial center of the base portion. A yoke arranged on a side portion of the electromagnetic coil, the base portion, a plunger press-fitted into the inner shaft, and an inner peripheral surface of the base portion or an inner peripheral surface of the yoke to press-fit the inner shaft. It consists of a cylindrical stepped guide body and The body and the plunger are formed in a shape that can be recombined, and the second urging means is arranged concentrically with the guide body so as to urge the plunger. Solenoid valve device. 7. A valve having a flange portion having a drain hole formed on the outer periphery of the base portion, a valve seat formed on a side wall facing the valve chamber with the outflow port of the base portion interposed therebetween, and a valve formed on the side wall. The solenoid valve device according to claim 5 or 6, wherein a flange portion is formed on the inner shaft so as to come into contact with a seat so as to be used as a duty valve. 8. The solenoid valve device according to claim 5, wherein the first biasing means is a non-linear spring whose load increases as it contracts.