JP2020125800A - Electromagnetic valve - Google Patents

Abstract

To provide an electromagnetic valve which achieves excellent axial load bearing, can prevent damage etc. of each member, such as a core and a yoke, secures coaxial arrangement between the core and the yoke to drive a plunger supported in the yoke smoothly, and can form a magnetic circuit sufficiently when the plunger is driven by magnetic force generated by a coil in an energization state.SOLUTION: An electromagnetic valve 1 includes a case 7, a bobbin 2, a coil 3, a core 4, a yoke 5, a resin member 6, and a ring member 8. The case 7 has: a step part 72 which contacts with the ring member 8; and a restriction part 73 which restricts movement of the ring member 8. The core 4 has a first inclined surface 41 forming a border groove 11 at a border part with the yoke 5. The resin member 6 is disposed in the border groove 11 and adheres to the first inclined surface 41.SELECTED DRAWING: Figure 1

Description

The present invention relates to a solenoid valve.

BACKGROUND ART Conventionally, as a vehicle-mounted solenoid valve, the solenoid valve described in Patent Document 1 is known. The solenoid valve described in Patent Document 1 includes a coil bobbin, a coil wound outside the coil bobbin, a fixed core arranged inside the coil bobbin, and a yoke arranged inside the coil bobbin and on one end side of the fixed core. With.

The solenoid valve also includes a tubular housing that collectively houses a coil bobbin around which a coil is wound, a fixed core and a yoke that are arranged adjacent to each other inside the coil bobbin. The housing is crimped on the opening side to prevent the fixed core and the like from falling out.

JP, 2005-277306, A

In the solenoid valve described in Patent Document 1, the fixed core has a cylindrical shape with no irregularities on the outer peripheral surface, and is simply inserted inside the coil bobbin. Similarly, the yoke also has a cylindrical shape with no unevenness particularly on the outer peripheral surface, and is simply inserted inside the coil bobbin. In such a configuration, the fixed core and the yoke may be displaced in the coil bobbin depending on the degree of vibration of the automobile. In this case, coaxiality between the fixed core and the yoke cannot be ensured, and the movable core supported in the yoke cannot be driven smoothly.

Further, when the movable core is driven by the magnetic force generated from the coil in the energized state, if the yoke is displaced, the magnetic circuit between the yoke and the coil cannot be sufficiently generated, and the movable core cannot be driven. Will be insufficient.
Further, the solenoid valve described in Patent Document 1 has a structure in which members inside the housing cannot sufficiently withstand depending on the degree of force generated during processing when the opening side of the housing is crimped as described above. ..

An object of the present invention is to have an excellent load resistance in the axial direction, prevent damage to each member such as a core and a yoke, and ensure the coaxiality between the core and the yoke so that the inside of the yoke can be secured. An object of the present invention is to provide a solenoid valve which can smoothly drive a plunger supported by a coil and can sufficiently form a magnetic circuit when the plunger is driven by a magnetic force generated from a coil in an energized state.

One aspect of the solenoid valve of the present invention has a cylindrical case having an opening portion that is open at one end in the axial direction, a through hole that penetrates along the axial direction, and flanges that are formed on both sides in the axial direction. A tubular bobbin inserted into the case, a coil wound around the outer periphery of the bobbin, and a tubular core made of a magnetic material and disposed on one axial end of the through hole. A cylindrical yoke that is made of a magnetic material and is disposed on the other end side in the axial direction of the through hole and that is not magnetically continuous with the core and is adjacent to the core; and the core and the yoke are magnetically discontinuous. A tubular resin member that is held in a state, and a ring member that is inserted into the case and is in contact with the core from one end side in the axial direction, and the case has the ring member from the other end side in the axial direction on the inner peripheral portion. Has a step portion in contact with the opening portion, and a regulation portion for regulating the movement of the ring member toward the one end side in the axial direction at the edge portion of the opening portion, and the core has an outer end portion on the other end side in the axial direction. The diameter of the taper portion is gradually reduced toward the other end in the axial direction, and a first inclined surface forming a boundary groove is formed at a boundary portion with the yoke, and the resin member is arranged in the boundary groove. Then, the first inclined surface is brought into close contact with the first inclined surface.

According to the present invention, the load resistance in the axial direction is excellent, and damage to each member such as the core and the yoke can be prevented. Further, the coaxiality between the core and the yoke can be ensured, and the plunger supported in the yoke can be driven smoothly. Further, when the plunger is driven by the magnetic force generated from the coil in the energized state, the magnetic circuit can be sufficiently formed.

FIG. 1 is a vertical sectional view showing an embodiment of a solenoid valve of the present invention. FIG. 2 is a vertical sectional view showing a core/yoke unit in which a core and a yoke included in the solenoid valve shown in FIG. 1 are connected. FIG. 3 is an enlarged view of a region [A] surrounded by a chain double-dashed line in FIG. FIG. 4 is an exploded perspective view of the core/yoke unit shown in FIG. 5A to 5C are vertical cross-sectional views sequentially showing a process of manufacturing the core/yoke unit shown in FIG. 6A to 6C are vertical sectional views sequentially showing a process of manufacturing the core/yoke unit shown in FIG. 7A to 7C are vertical sectional views sequentially showing a process of manufacturing the core/yoke unit shown in FIG.

Hereinafter, a solenoid valve of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
An embodiment of a solenoid valve of the present invention will be described with reference to FIGS. In the following, for convenience of explanation, three axes orthogonal to each other are set as the X axis, the Y axis, and the Z axis. The XY plane including the X axis and the Y axis is horizontal, and the Z axis is vertical. A direction parallel to the X-axis is referred to as "axial direction (axis O ₂ direction)", a radial direction around this axis is simply referred to as "radial direction", and a circumferential direction around the axis is simply referred to as "circumferential direction". ". The positive side in the X-axis direction may be referred to as “one side in the axial direction” or simply “one side”, and the negative side in the X-axis may be referred to as “the other side in the axial direction” or simply “the other side”. In the present specification, the up-down direction, the horizontal direction, the upper side and the lower side are simply names for explaining the relative positional relationship between the respective parts, and the actual positional relationship and the like are the positional relationship and the like indicated by these names. Other arrangement relationships may be used.

The solenoid valve 1 shown in FIG. 1 controls hydraulic pressure in a hydraulic circuit in an automatic transmission of an automobile, for example. The solenoid valve 1 includes a case 7, a bobbin 2, a coil 3, a core/yoke unit 10, a plunger 13, a plunger pin 14, a ring member 8, a valve sleeve 15, a collar 9, and a pressing member 12. With.
The case 7 has a bottomed tubular shape. That is, the case 7 is a tubular member having an opening 71 that is open at one end side (one end side in the axial direction) and a wall part 74 that closes the other end side (the other end side in the axial direction). The case 7 is made of a magnetic metal material such as iron.

The bobbin 2 is arranged inside the case 7. The bobbin 2 has a tubular shape, and its axis O ₂ is arranged parallel to the X-axis direction.
Further, the bobbin 2 has a through hole 22 penetrating along the axis O ₂ direction. The inner diameter of the through hole 22 is constant along the direction of the axis O ₂ .

The bobbin 2 has a flange 23 protruding in the radial direction at one end side and a flange 24 protruding in the radial direction at the other end side.
Like the case 7, the bobbin 2 is made of a magnetic metal material.

A coil 3 having conductivity is wound around the outer peripheral portion 21 of the bobbin 2. When the coil 3 is energized, the bobbin 2, the collar 9, the case 7, the core 4 and the yoke 5 of the core/yoke unit 10 form a magnetic circuit. This allows the plunger 13 to reciprocate along the axis O ₂ direction.

Core yoke unit 10 includes a core 4 disposed at one end side in the axial O ₂ direction, the yoke 5 disposed at the other end side in the axial O ₂ direction, which is disposed across the core 4 and the yoke 5 And a resin member 6.
As shown in FIG. 4, the core 4 has a cylindrical shape as a whole, and its axis O ₄ is arranged parallel to the X-axis direction. The axis O _{4 of the} core 4 overlaps the axis O _{2 of the} bobbin 2.

The yoke 5 is also cylindrical as a whole, and its axis O ₅ is arranged parallel to the X-axis direction. The axis O _{5 of the} yoke 5 also overlaps the axis O _{2 of the} bobbin 2.
Similar to the core 4 and the yoke 5, the resin member 6 has a cylindrical shape as a whole, and its axis O ₆ is arranged parallel to the X-axis direction. Axis _{O 6} of the resin member 6 also overlaps the axis _{O 2} of the bobbin 2.
The core 4, the yoke 5, and the resin member 6 each have a cylindrical shape in the present embodiment, but are not limited to this, and may have, for example, a rectangular tube shape.

The core 4 and the yoke 5 are made of a magnetic material such as iron, that is, made of a magnetic metal material. As a result, it is possible to generate a magnetic circuit that allows the plunger 13 to reciprocate sufficiently.
Further, as shown in FIGS. 1 and 2, the core 4 and the yoke 5 are adjacent to each other in the direction of the axis O ₂ , but are separated from each other. As a result, the core 4 and the yoke 5 are in a magnetically discontinuous state (hereinafter referred to as “magnetically discontinuous state”). Here, the "magnetically discontinuous state" means a state in which the magnetic circuit is not directly connected. In order to make the magnetically discontinuous state, apart from separating the core 4 and the yoke 5, for example, the core 4 and the yoke 5 are in contact with each other, but at least one of the core 4 and the yoke 5 It is possible to apply a non-magnetic coating to the surface of the.

The resin member 6 holds the core 4 and the yoke 5 in a magnetically discontinuous state. For the resin member 6, for example, various resin materials such as thermoplastic resin can be used.
Inside the core/yoke unit 10 having such a structure, a plunger 13 made of a magnetic material is supported so as to be capable of reciprocating along the axis O ₂ direction. Inside the core/yoke unit 10, a plunger pin 14 is arranged at one end side of the plunger 13. When the plunger 13 reciprocates, the force is transmitted to the valve (not shown) that switches the hydraulic circuit via the plunger pin 14. As a result, the valve can be operated.

As shown in FIG. 1, an annular ring member 8 is inserted in the case 7. The ring member 8 is arranged concentrically with the core/yoke unit 10. The ring member 8 contacts the core 4 from one end side. The flange 151 of the valve sleeve 15 is in contact with one end of the ring member 8. Further, the flange 151 contacts the restricting portion 73 formed by a bent portion formed by bending the edge portion of the opening portion 71 of the case 7 inward. Thereby, the movement of the ring member 8 toward the one end side in the direction of the axis O ₂ can be restricted. Further, the position of the core/yoke unit 10 in the direction of the axis O ₂ can be restricted between the restricting portion 73 of the case 7 and the wall portion 74, so that the magnetic circuit can be stably constructed.

As shown in FIG. 2, the core 4 has a reduced diameter portion 44 having an outer diameter φd _4A reduced at one end. The reduced diameter portion 44 penetrates the ring member 8. Thereby, the radial position of the ring member 8 can be regulated.
Further, the core 4 has a large diameter portion 45 adjacent to the other end side of the reduced diameter portion 44 and having an outer diameter φd _4A larger than that of the reduced diameter portion 44. The ring member 8 is in contact with the large diameter portion 45.

Next, a detailed structure of the core/yoke unit 10 will be described.
As described above, the core yoke unit 10 includes a core 4 disposed at one end side in the axial O ₂ direction, the yoke 5 disposed at the other end side in the axial O ₂ direction, the core 4 and the yoke 5 It has the resin member 6 arrange|positioned straddling.

As shown in FIGS. 2 and 4, the core 4, the outer peripheral portion, the first inclined surface 41 located at the other end portion of the shaft O ₂ direction, the axial O ₂ direction of the one end side of the first inclined surface 41 And a first groove 42 located at.
The first inclined surface 41 is composed of a tapered portion whose outer diameter φd _4A gradually decreases toward the other end in the direction of the axis O ₂ . The first inclined surface 41 can form the boundary groove 11 at the boundary with the yoke 5.
The above-described reduced diameter portion 44 is located on one end side with respect to the first inclined surface 41, and the above-described large diameter portion 45 is located between the first inclined surface 41 and the reduced diameter portion 44. doing.

The first groove 42 is a ring-shaped groove extending in the circumferential direction of the core 4. The number of the first grooves 42 arranged is one in the present embodiment, but is not limited to this and may be plural. For example, when the number of the first grooves 42 arranged is three or more, it is preferable that the first grooves 42 are arranged at equal intervals along the direction of the axis O ₂ .
Further, as shown in FIG. 4, between the first inclined surface 41 and the first groove 42, a high portion 46 and a low portion 47 having different heights along the radial direction are provided around each other around the axis O _4. It is located in.

Yoke 5 has an outer peripheral portion, and the second inclined surface 51 positioned at one end of the shaft O ₂ direction, and a second groove 52 located on the other end side in the axial O ₂ direction than the second inclined surface 51 ..
The second inclined surface 51 is composed of a tapered portion whose outer diameter φd _5A gradually decreases toward one end in the direction of the axis O ₂ . The second inclined surface 51 can form the boundary groove 11 together with the first inclined surface 41. Then, as shown in FIG. 2, the inclination angle theta ₄₁ of the first inclined surface 41, the inclination angle theta ₅₁ of the second inclined surface 51, of the same size. Accordingly, for example, when the core/yoke unit 10 is manufactured, the first inclined surface 41 and the second inclined surface 51 can be formed quickly, and thus the manufacturability is improved. The inclination angle θ ₄₁ and the inclination angle θ ₅₁ have the same magnitude, but are not limited to this and may be different.

The second groove 52 is a ring-shaped groove extending along the circumferential direction of the yoke 5. Although the number of the second grooves 52 arranged is one in the present embodiment, the number is not limited to this and may be plural. For example, when the number of the second grooves 52 arranged is three or more, it is preferable that the second grooves 52 are arranged at equal intervals along the direction of the axis O ₂ .
Further, as shown in FIG. 4, between the second inclined surface 51 and the second groove 52, a high portion 56 and a low portion 57 having different heights along the radial direction are provided around each other around the axis O _5. It is located in.

Distance _{L 4} of the first inclined surface 41 along the axial _{O 2} direction and the first groove 42 is longer than the distance _{L 5} between the second inclined surface 51 along the axial _{O 2} direction and the second groove 52. As a result, the first groove 42 can be separated from the first inclined surface 41, so that the length of the first inclined surface 41 along the axis O ₂ direction should be large enough to secure a magnetic circuit. You can

Further, the width _{W 42} of the first groove 42, the width _{W 52} of the second groove 52 are the same size, the depth _{dp 42} of the first groove 42, the depth _{dp 52} of the second groove 52 Are the same size. Thereby, for example, when the core/yoke unit 10 is manufactured, the first groove 42 and the second groove 52 can be formed quickly, and thus the manufacturability is improved.

The width W ₄₂ and the width W ₅₂ have the same size, but are not limited to this and may be different. Similarly, the depth dp ₄₂ and the depth dp ₅₂ have the same size, but are not limited to this and may be different. When the depth dp ₄₂ and the depth dp ₅₂ are different,
Further, the depth dp ₄₂ is smaller than the width W ₄₂ , and the depth dp ₅₂ is smaller than the width W ₅₂ . As a result, the depth dp ₄₂ and the depth dp ₅₂ can be set relatively shallow, which is preferable for the magnetic circuit.

As shown in FIG. 2, the resin member 6 is arranged in the boundary groove 11, the first portion 64, the second portion 65 arranged in the first groove 42, and the second portion 52. And a third portion 66.
The first portion 64 fills the entire boundary groove 11 and is in close contact with both the first inclined surface 41 and the second inclined surface 51.
The second portion 65 fills the entire inside of the first groove 42 and is in close contact with the inner surface of the first groove 42.
The third portion 66 fills the entire second groove 52 and is in close contact with the inner surface of the second groove 52.

Due to the first portion 64, the second portion 65, and the third portion 66, the core 4 and the resin member 6 are caught by each other, the contact area between the core 4 and the resin member 6 is increased, and the yoke 5 and the resin member 6 are increased. 6, the contact area between the yoke 5 and the resin member 6 increases. As a result, even if vibrations from, for example, an automobile engine are transmitted to the core/yoke unit 10, the core 4 and the yoke 5 are prevented from being displaced from each other, and the coaxiality between the core 4 and the yoke 5 is prevented. You can secure enough. If the coaxiality between the core 4 and the yoke 5 is sufficiently ensured, the plunger 13 in the core/yoke unit 10 can be smoothly driven.
Further, as described above, the core 4 and the yoke 5 constitute a magnetic circuit when driving the plunger 13. Further, by preventing the positional deviation between the core 4 and the yoke 5, it is possible to sufficiently generate a magnetic circuit that drives the plunger 13 quickly.

The first portion 64 is in a state of filling the entire inside of the boundary groove 11, but it is not limited to this, and may be in a state of filling part of the inside of the boundary groove 11. Similarly, the second portion 65 is in a state of filling the entire first groove 42, but is not limited to this, and may be in a state of partially filling the first groove 42. .. Further, the third portion 66 is also in a state of filling the entire second groove 52, but is not limited to this, and may be in a state of partially filling the second groove 52.
Further, in the yoke 5, at least one of the second inclined surface 51 and the second groove 52 may be omitted.

As shown in FIG. 4, the resin member 6 has a plurality of first through holes 61 at one end and a plurality of second through holes 62 at the other end.
The plurality of first through holes 61 are arranged at equal intervals along the circumferential direction of the resin member 6. Then, in each of the first through holes 61, the high portion 46 between the first inclined surface 41 of the core 4 and the first groove 42 enters from the inside of the resin member 6 and projects outward. As a result, the core 4 is hooked on the resin member 6.

The plurality of second through holes 62 are also arranged at equal intervals along the circumferential direction of the resin member 6. The high portion 56 between the second inclined surface 51 of the yoke 5 and the second groove 52 enters the second through hole 62 from the inside of the resin member 6 and projects outward. As a result, the yoke 5 is hooked on the resin member 6.

When the one end side and the other end side of the resin member 6 are in such a hooked state, it is possible to prevent the core 4 and the yoke 5 from coming off from the resin member 6, and thus, the core 4 and the yoke 5 are separated. The positional relationship of can be stably maintained.
The number of the first through holes 61 and the second through holes 62 arranged is not limited to a plurality, and may be one. Further, the number of the first through holes 61 arranged and the number of the second through holes 62 may be the same or different.

As shown in FIG. 2, the resin member 6 has an inner groove 63 between the core 4 and the yoke 5, that is, in the inner peripheral portion of the portion located in the boundary groove 11. The inner groove 63 is a ring-shaped groove along the circumferential direction of the resin member 6. The inner groove 63 is connected to the space 43 inside the core 4 and the space 53 inside the yoke 5. Such an inner groove 63 can suppress, for example, distortion (deformation) of the resin member 6 due to temperature change or secular change, thus contributing to smooth driving of the plunger 13 supported in the yoke 5. To do.

The width W ₆₃ of the inner groove 63 is the same as the distance between the core 4 and the yoke 5, but is not limited to this and may be different. The depth _{dp 63} of the inner grooves 63, for example, can be the same as the depth _{dp 42} and depth _{dp 52,} but is not limited thereto.
As described above, the annular ring member 8 is inserted into the case 7 (see FIG. 1). The movement of the ring member 8 together with the flange 151 of the valve sleeve 15 toward the one end in the axis O ₂ direction is restricted by the restriction portion 73 of the case 7. The restriction portion 73 is configured by a bent portion (a crimp portion) in which the edge portion of the opening portion 71 of the case 7 is bent inward.

Further, when the edge portion of the opening 71 of the case 7 is crimped as described above, the flange 151 of the valve sleeve 15, the ring member 8 and the core/yoke unit 10 are attached to the other end side along the axis O ₂ direction. Heading force acts. Then, depending on the magnitude of this force, stress may concentrate on the first portion 64 of the resin member 6 in the boundary groove 11, and the first portion 64 may be damaged.

Therefore, the solenoid valve 1 is configured to prevent such a problem. Hereinafter, the configuration and operation will be described.
As shown in FIG. 3, the case 7 has a step portion 72 that is provided on the inner peripheral portion 75 and has a sharply changed inner diameter. The stepped portion 72 contacts the ring member 8 from the other end side in the direction of the axis O ₂ . The stepped portion 72 is provided along the circumferential direction of the inner peripheral portion 75 of the case 7, and particularly preferably has a length of 50% or more of the entire circumference of the inner peripheral portion 75. Further, the height (thickness) H ₇₂ of the stepped portion 72 is, for example, the distance between the inner peripheral portion 75 and the outer peripheral portion 76 of the case 7, that is, the thickness T ₇ of the side wall of the case 7, Can be set appropriately, and the higher the better.

Then, when the edge portion of the opening 71 of the case 7 is crimped, the force generated by the crimping can be received by the ring member 8 in contact with the step portion 72. Thereby, the transmission of the force from the ring member 8 to the other end side is suppressed, so that the stress concentration in the first portion 64 of the resin member 6 can be prevented.
With the above-described configuration, the load resistance in the direction of the axis O ₂ is excellent, and damage to the resin member 6 and other members such as the core 4 and the yoke 5 can be prevented. Thereby, the solenoid valve 1 can be stably used for a long period of time.

Further, as described above, the transmission of the force from the ring member 8 to the other end side is suppressed, so that the yoke 5 may not be in sufficient contact with the case 7. In constructing a magnetic circuit in the solenoid valve 1, it is preferable that the yoke 5 and the case 7 are sufficiently in contact with each other.
As shown in FIG. 1, the solenoid valve 1 includes a collar 9 that contacts the case 7 and the yoke 5, and a pressing member 12 that presses the collar 9 to the other end side in the axial direction O ₂ . Like the core 4 and the yoke 5, the collar 9 is made of a magnetic material such as iron.
The collar 9 is arranged on the other end side of the yoke 5 in the direction of the axis O ₂ . The collar 9 has a ring shape, and the yoke 5 penetrates and is fitted therein. As a result, the inner peripheral portion 91 of the collar 9 and the outer peripheral portion 58 of the yoke 5 are in contact with each other.

Further, the collar 9 has a flange 92 having an enlarged outer diameter on the other end side. The flange 92 contacts the wall portion 74 of the case 7.
The pressing member 12 is arranged between the flange 92 of the collar 9 and the flange 24 of the bobbin 2. The pressing member 12 is not particularly limited, and is composed of, for example, a wave spring, a spring washer, a coil spring, or the like. Further, the pressing member 12 is arranged between the flange 92 of the collar 9 and the flange 24 of the bobbin 2 in a state of being compressed in the axis O ₂ direction. Accordingly, the flange 92 of the collar 9 can be pressed against and brought into contact with the wall portion 74 of the case 7.

With the above-described configuration, the case 7 and the yoke 5 are sufficiently in contact with each other via the collar 9, so that the magnetic circuit can be stably generated. As a result, the plunger 13 can be driven reliably.

Next, a method for manufacturing the core/yoke unit 10 will be described with reference to FIGS.
First, a cylindrical base material having a predetermined length and serving as the core 4 and the yoke 5 is prepared. The outer diameter and the inner diameter of this base material are constant along the X-axis direction. Further, the total length of the base material is the same as the total length of the core/yoke unit 10.
Then, the base material is annealed.

Then, the base material is cut. As a result, the base material is brought into the state shown in FIG. Further, in the state shown in FIG. 5, the core 4 and the yoke 5 are not yet separated from each other and are connected to each other via the thin portion 16.
Next, the base material is plated.

Next, the resin member 6 is provided on the base material by insert molding. As a result, the base material is brought into the state shown in FIG.
Next, by cutting the inside of the base material, the thin portion 16 is removed and the inside groove 63 is provided. As a result, the core 4 and the yoke 5 can be separated from each other, so that the core/yoke unit 10 shown in FIG. 7 is obtained.

Although the solenoid valve of the present invention has been described above with reference to the illustrated embodiment, the present invention is not limited to this, and each part constituting the solenoid valve has an arbitrary configuration capable of exhibiting the same function. Can be replaced with In addition, any constituent may be added.

DESCRIPTION OF SYMBOLS 1... Electromagnetic valve, 2... Bobbin, 21... Outer peripheral part, 22... Through hole, 23... Flange, 24... Flange, 3... Coil, 4... Core, 41... 1st inclined surface, 42... 1st groove|channel, 43... Space, 44... Reduced diameter part, 45... Larger diameter part, 46... High part, 47... Low part, 5... Yoke, 51... Second inclined surface, 52... Second groove, 53... Space, 56... High part, 57... Lower part, 58... Outer peripheral part, 6... Resin member, 61... First through hole, 62... Second through hole, 63... Inner groove, 64... First part, 65... Second part, 66... Third Part, 7... Case, 71... Opening part, 72... Step part, 73... Regulation part, 74... Wall part, 75... Inner peripheral part, 76... Outer peripheral part, 8... Ring member, 9... Collar, 91... Inner circumference Part, 92... Flange, 10... Core/Yoke unit, 11... Boundary groove, 12... Pressing member, 13... Plunger, 14... Plunger pin, 15... Valve sleeve, 151... Flange, 16... Thin portion, dp ₄₂ ... Deep is, dp _{52 ...} depth, dp _{63 ...} depth, H _{72 ...} height (thickness), L 4 _... distance, L 5 _... distance, O 2 _... shaft, O 4 _... axial, O 5 _... shaft, O ₆ ... Axis, T ₇ ... Thickness, W ₄₂ ... Width, W ₅₂ ... Width, W ₆₃ ... Width, φd _4A ... Outer diameter, φd _5A ... Outer diameter, θ ₄₁ ... Inclination angle, θ ₅₁ ... Inclination angle

Claims (7)

A cylindrical case having an opening that opens at one axial side,
A cylindrical bobbin that has a through hole penetrating along the axial direction and flanges formed on both sides in the axial direction, and is inserted into the case.
A coil wound around the outer periphery of the bobbin,
A cylindrical core made of a magnetic material and arranged at one end side in the axial direction of the through hole,
A tubular yoke made of a magnetic material, disposed on the other end side in the axial direction of the through hole, and adjacent to the core without being magnetically continuous,
A tubular resin member that holds the core and the yoke in a magnetically discontinuous state,
A ring member that is inserted into the case and is in contact with the core from one end in the axial direction,
The case has a stepped portion that contacts the ring member from the other end side in the axial direction on the inner peripheral portion, and a regulation portion that regulates the movement of the ring member toward the one end side in the axial direction at the edge portion of the opening. Then
The core has a tapered portion having an outer diameter gradually decreasing toward the other end in the axial direction at an end portion on the other end side in the axial direction, and a first inclined surface forming a boundary groove at a boundary portion with the yoke. Have
The solenoid valve, wherein the resin member is disposed in the boundary groove and is in close contact with the first inclined surface. The solenoid valve according to claim 1, wherein the core is provided on one end side in the axial direction with respect to the first inclined surface, has an outer diameter reduced, and has a reduced diameter portion that penetrates the ring member. The solenoid valve according to claim 2, wherein the core has a large diameter portion between the first inclined surface and the reduced diameter portion that has an outer diameter larger than that of the reduced diameter portion and is in contact with the ring member. The solenoid valve according to any one of claims 1 to 3, wherein the yoke is disposed so as to penetrate through the other end of the yoke in the axial direction, and the collar includes a collar that is in contact with the case and the yoke. The solenoid valve according to claim 4, further comprising a pressing member that is disposed in the case and presses the collar toward the axial direction. The yoke has a tapered portion whose outer diameter gradually decreases toward the one end in the axial direction at an end portion on the one end side in the axial direction, and has a second inclined surface forming the boundary groove together with the first inclined surface. Then
The solenoid valve according to any one of claims 1 to 5, wherein the resin member is in close contact with the second inclined surface. 7. The resin member has an inner groove, which is connected to a space inside the core and a space inside the yoke, in an inner peripheral portion of a portion located in the boundary groove. The solenoid valve described.

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