JPH1030746A - Synthetic resin coil bobbin for solenoid valve - Google Patents

Abstract

(57) [Summary] [Object] An elastic ring member disposed in an annular ring groove formed between a coil bobbin formed of a synthetic resin material and a housing made of a metal material is always irrespective of a temperature change. Holds with appropriate elastic compressive force and maintains good sealing properties. A collar member is formed in a cylindrical shape from a material having a smaller linear expansion coefficient than a synthetic resin material forming a coil bobbin. The coil bobbin 1 is formed of a synthetic resin material, and the collar member 20 is integrally molded around an annular ring groove 2 formed in the annular flange 1C of the coil bobbin 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and a coil is wound around a cylindrical portion to generate a magnetic force in a magnetic circuit formed by a housing, a fixed core, a movable core, a pole piece, and the like. In particular, the present invention relates to a coil bobbin made of synthetic resin in an electromagnetic valve in which the coil bobbin is formed of a synthetic resin material.

[0002]

2. Description of the Related Art A coil bobbin made of synthetic resin in a conventional solenoid valve will be described with reference to FIG. Coil bobbin 1
Is formed by: 1A is the longitudinal axis direction X-
It is a cylindrical portion extending along X, and a through hole 1B is formed in the inside thereof so as to penetrate from one end (upper in the drawing) to the other end (lower in the drawing). An annular flange 1C extends outward from one end of the cylindrical portion 1A,
An annular collar portion 1C extends outward from the other end of the cylindrical portion 1A. An annular ring groove 2 that opens toward the inside 1D of the annular flange 1C is formed in the annular flange 1C at one end of the cylindrical portion 1A. This annular ring groove 2 has a longitudinal axis direction X-
It is formed by a vertical wall 2A along X and a horizontal wall 2B along a horizontal direction YY orthogonal to the longitudinal axis direction XX. That is, the annular ring groove 2 is opened on the inner side 1D of the annular flange 1C and the end face 1E on one end side (upper side in the figure) of the annular flange 1C. Further, an annular ring groove 2 that opens toward the outer side 1F of the annular flange 1C is formed in the annular flange 1C at the other end of the cylindrical portion 1A. The annular ring groove 2 has a vertical wall 2A along the longitudinal axis direction XX and a horizontal wall 2 along the horizontal direction YY orthogonal to the longitudinal axis direction XX.
B. That is, the annular ring groove 2 is open to the outer side 1F of the annular flange 1C and the end face 1E (the lower side in the figure) of the other end of the annular flange 1C. The coil 3 is wound around the outer periphery of the cylindrical portion 1A, and the coil 3 is connected to the terminal 3A implanted in the annular flange 1C at one end.
Is connected to a power supply (not shown). The coil bobbin 1 is formed of a synthetic resin material. This is due to the fact that the synthetic resin material has insulating properties and can be manufactured very easily by injection molding.

The solenoid valve is formed by the coil bobbin 1 made of the synthetic resin material as follows. Reference numeral 4 denotes a bottomed cylindrical housing having an open lower end and a bottom 4A at one end, and a cylindrical portion as a fixed core 4B protrudes into the housing 4 from the center of the bottom 4A toward the lower end. The housing 4 is formed of a metal material for forming a magnetic circuit. The coil bobbin 1 extends from the opening at the lower end of the housing 4 toward the bottom 4A.
At this time, the through hole 1B of the cylindrical portion 1A of the coil bobbin 1 is inserted and arranged on the outer periphery of the fixed core 4B, the end face 1E of the annular flange 1C at one end contacts the bottom 4A, and the terminal 3A Is formed through the housing 4 through the bottom 4A.
Protruding outward.

Then, from the opening at the lower end of the housing 4,
An annular magnetic pole piece 5 is directed toward the end face 1E of the other annular flange 1C.
Then, the valve body 6 having the valve seat 6A is inserted, and these are fixed to the housing 4. Reference numeral 7 denotes a movable core which is movably arranged to face the fixed core 4B.
Is attracted to the fixed core 4B side by a magnetic force generated in a magnetic circuit formed by the fixed core 4B, the housing 4, the magnetic pole piece 5, and the movable core 7, and when the magnetic force disappears, the fixed core 4B and the movable core 7 is moved away from the fixed core 4B by the spring force of the spring 8 contracted between the fixed core 4B. According to the movement of the movable core 7, the valve portion 9 formed integrally with the movable core 7 opens and closes the valve seat 6A. When the movable core 7 is suction-operated by the fixed core 4B, the valve seat 6A is held open by the valve portion 9, and the fixed core 4B is opened.
Fluid flows into the valve seat 6 </ b> A through the flow path formed inside B and the flow path formed inside the movable core 7, and the fluid is supplied from the valve body 6. On the other hand, when the movable core 7 separates from the fixed core 4B, the valve portion 9 closes and holds the valve seat 6A, the flow of the fluid from the flow path into the valve seat 6A is prevented, and the supply of the fluid from the valve body 6 is performed. Is stopped.

As described above, the fluid flows through the inside of the solenoid valve, so that the fluid does not leak out of the housing 4 in the annular ring groove 2 of the annular flange portion 1C at one end and the annular flange at the other end. An elastic ring member 10 such as an O-ring or a square ring made of a rubber material is provided in the annular ring groove 2 of the portion 1C.
Is arranged.

That is, the elastic ring member 10 arranged in the annular ring groove 2 of the annular flange portion 1C at one end is elastically compressed and arranged by the outer periphery of the fixed core 4B and the vertical wall 2A of the annular ring groove 2. Is done. Also, the annular collar 1C at the other end.
Elastic ring member 10 disposed in the annular ring groove 2
Are elastically compressed and arranged by the vertical wall 2A of the annular ring groove 2 and the inner part of the housing 4. Therefore, the fluid flowing inside the housing 4 due to the sealing action of the elastic member 10 is prevented from leaking out of the housing.

[0007]

According to the conventional synthetic resin material of the solenoid valve, there are the following problems. (1) When the temperature of the fluid flowing in the solenoid valve is low, or when the environmental temperature at which the solenoid valve is disposed is low, the elastic ring member 10 in the annular flange 1C at the other end should maintain proper sealing. Is difficult. That is, considering the annular ring groove 2 of the annular flange 1C at the other end, the coil bobbin 1 is formed of a synthetic resin material, so that its linear expansion coefficient is large (for example, 3 × 10 −5 in nylon). 5 × 10 −5 cm / cm ° C.),
Thereby, the vertical wall 2A is largely contracted and deformed inward, and the diameter of the vertical wall 2A is greatly reduced.

On the other hand, since the housing 4 is made of a metal material, its linear expansion coefficient is smaller than that of a synthetic resin material (for example, 12 × in stainless steel).
10-6 to 14 x 10-6 cm / cmC. ), Whereby the inner diameter of the housing 4 is not significantly shrunk and deformed.

According to the above description, the groove width of the annular ring groove 2 is increased corresponding to a value obtained by subtracting the decrease in the diameter of the housing 4 from the decrease in the diameter of the vertical wall 2A. Therefore,
The elastic compressive force applied to the elastic ring member 10 held at the time of initial setting is weakened, and it is difficult to maintain proper sealing. This becomes more pronounced as the rate of temperature drop increases.

(2) When the temperature of the fluid flowing through the solenoid valve is high, or when the environmental temperature at which the solenoid valve is disposed is high, the elastic ring member 10 in the annular flange 1C at one end maintains proper sealing. Is difficult to do. That is, considering the annular ring groove 2 of the annular flange 1C at one end, since the coil bobbin 1 is formed of a synthetic resin material, its linear expansion coefficient is large, and thereby the vertical wall 2A is largely outward. The diameter of the vertical wall 2A greatly increases.

On the other hand, since the fixed core 4B of the housing 4 is formed of a metal material, its linear expansion coefficient is smaller than that of the synthetic resin material, so that the outer diameter of the fixed core 4B of the housing 4 can be reduced. Is not greatly enlarged and deformed.

As described above, the groove width of the annular ring groove 2 is increased by a value obtained by subtracting the increase in the diameter of the fixed core 4B of the housing 4 from the increase in the diameter of the vertical wall 2A. Therefore, the elastic compressive force applied to the elastic ring member 10 held at the time of the initial setting is weakened, and it becomes difficult to maintain proper sealing performance. This becomes more pronounced as the rate of temperature rise increases.

The coil bobbin made of synthetic resin in the solenoid valve according to the present invention has been made in view of the above problems, and is made of a coil bobbin made of a synthetic resin material and a metal material even when the temperature applied to the coil bobbin changes greatly. An elastic ring member arranged in an annular ring groove formed between the housing and the housing can always be held with an appropriate elastic compressive force, and can maintain excellent sealing performance against temperature changes. An object is to provide a coil bobbin made of resin.

[0014]

In order to achieve the above object, a synthetic resin coil bobbin in a solenoid valve according to the present invention has a cylindrical portion extending along a longitudinal axis direction XX and a cylindrical portion extending from both ends of the cylindrical portion. An annular flange extending outward, a vertical wall opening inward or outward of the annular flange, and a vertical wall along a longitudinal axis direction XX of the cylindrical portion, and a longitudinal axis direction X-
A horizontal wall along a horizontal direction Y-Y orthogonal to X, and an annular ring groove formed by a coil bobbin,
A cylindrical collar member made of a material having a linear expansion coefficient smaller than that of the synthetic resin material and integrally formed around the vertical wall of the annular ring groove; This is the first feature.

According to the present invention, in addition to the first feature, the collar member may be configured so that the collar member faces the inside of the horizontal wall from one end of the cylindrical portion along the vertical wall, and extends in the horizontal direction along the horizontal wall. Y-
A second feature is that it is formed by an annular portion extending in Y.

According to the present invention, in addition to the first feature, the collar member includes a cylindrical portion extending along a vertical wall, and a collar extending from one end of the cylindrical portion in a horizontal direction YY along a horizontal wall. A third feature is that it is formed by one annular portion and a second annular portion extending in the horizontal direction YY along the horizontal wall from the other end of the cylindrical portion.

According to the present invention, in addition to the first feature, the collar member includes a cylindrical portion extending along a vertical wall, and a collar extending from one end of the cylindrical portion in a horizontal direction YY along a horizontal wall. A fourth feature is that the first annular portion and the second annular portion extending from the other end of the cylindrical portion in a horizontal direction Y-Y opposite to the first annular portion are formed.

The present invention also provides a cylindrical portion extending along the longitudinal axis direction XX, an annular flange extending outward from both ends of the cylindrical portion, and an inner or outer side of the annular flange. And a vertical wall extending along the longitudinal axis direction XX of the cylindrical portion, and a horizontal direction Y orthogonal to the longitudinal axis direction XX.
A coil bobbin comprising a horizontal wall along -Y and an annular ring groove formed by a synthetic resin material; an annular opening around the vertical wall of the annular ring groove at the end face of the annular flange. A fifth feature is that a recess is formed, and a cylindrical collar member made of a material having a smaller linear expansion coefficient than that of the synthetic resin material is press-fitted in the annular recess.

[0019]

According to the first feature, when the temperature applied to the coil bobbin changes, the deformation of the vertical wall, particularly in the radial direction, is suppressed by the molded cylindrical collar member. An increase in the groove width can be suppressed, whereby the elastic compressive force on the elastic ring member is not weakened, and proper sealing performance can be maintained.

According to the second feature, since the annular portion extending horizontally from one end of the cylindrical portion is disposed facing the horizontal wall, the deformation of the vertical wall and the horizontal wall can be suppressed at the same time. The deformation of the vertical wall can be more effectively suppressed.

According to the third feature, since the first annular portion and the second annular portion extending in the horizontal direction from both ends of the cylindrical portion are provided, the pressure resistance in the horizontal direction of the cylindrical portion can be further increased. Thus, deformation of the vertical wall can be effectively suppressed.

According to the fourth feature, a bag-like portion surrounded on three sides is not formed on the collar member.
According to this, when the collar member is integrally molded with the coil bobbin, the synthetic resin material can be smoothly flowed and molded without obstructing the flow of the synthetic resin material, so that the coil bobbin can be manufactured favorably. In addition, the deformation of the vertical wall can be effectively suppressed.

According to the fifth feature, since the collar member may be press-fitted into the annular concave portion opened at the end face of the annular concave portion, the coil bobbin can be manufactured very easily, and the vertical wall can be formed. Can be effectively suppressed.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a synthetic resin coil bobbin in a solenoid valve according to the present invention will be described below with reference to FIG. still,
The same components as those in FIG. 6 are denoted by the same reference numerals, and description thereof is omitted. Reference numeral 20 denotes a cylindrical collar member formed of a material having a smaller linear expansion coefficient than the synthetic resin material, for example, a metal material such as iron or ceramic. The collar member 20 is fixedly arranged along the vertical wall 2A of the annular ring groove 2. Circular collar 1C at the other end
To be more specific, the collar member 20 is located inside the vertical wall 2A and along the vertical wall 2A, and is integrally molded when the coil bobbin 1 is molded in this state. Therefore, the outer periphery 20A of the collar member 20 is not directly exposed in the annular ring groove 2, which is preferable for maintaining the sealing property of the annular ring groove 2 itself.

Next, a specific description will be given of the annular flange 1C at one end. The collar member 20 is disposed slightly outside the vertical wall 2A and is arranged along the vertical wall 2A. Sometimes they are integrally molded.

Next, the operation will be described. When the temperature applied to the coil bobbin 1 decreases, the coil bobbin 1 is formed of a synthetic resin material, and its linear expansion coefficient increases, so that the vertical wall 2A tends to contract and deform inward. Here, focusing on the vertical wall 2A of the annular flange 1C at the other end, the collar member 20 blocks the space between the inner side 1D of the annular flange 1C and the vertical wall 2A. The inward contraction deformation of the annular flange 1C between the inner wall 20B and the inner periphery 20B of the vertical wall 20A does not affect the contraction deformation of the vertical wall 2A at all. On the other hand, the collar member 20
The annular flange portion 1C between the outer periphery 20A and the vertical wall 2A also contracts and deforms inward, but this cylindrical portion is formed thin and has a small radial thickness. Since the collar member 20 is disposed inside, the amount of contraction deformation can be extremely small.

According to the above description, the groove width of the annular ring groove 2 does not change significantly at low temperatures, and the elastic ring member 10 is appropriately compressed by the vertical wall 2A and the inside of the housing 4. , So that good sealing properties can be obtained in the annular ring groove 2 on the other end side.

When the temperature applied to the coil bobbin 1 rises, the coil bobbin 1 is formed of a synthetic resin material, and its linear expansion coefficient increases.
Tries to expand and deform outward. Here, focusing on the vertical wall 2A of the annular flange 1C at one end, the collar member 20 is located between the outer side 1F of the annular flange 1C and the vertical wall 2A.
The outer side 1F and the collar member 2
The outward expansion deformation of the annular flange 1C between the outer periphery 20A and the outer periphery 20A does not affect the expansion deformation of the vertical wall 2A at all. The cylindrical portion between the inner circumference 20B of the collar member 20 and the vertical wall 2A also expands and deforms outward. However, this cylindrical portion is formed to be thin and has a small radial thickness. In addition, since the collar member 20 is disposed outside the cylindrical portion, the amount of enlarged deformation can be extremely small.

According to the above description, the groove width of the annular ring groove 2 does not greatly change at a high temperature, and the elastic ring member 10 can be appropriately fixed by the vertical wall 2A and the outer periphery of the fixed core 4B of the housing 4. It can be pressed and supported with an elastic compressive force, so that good sealing properties can be obtained in the annular ring groove 2 at one end. The thickness of the cylindrical portion is appropriately selected according to the synthetic resin material used for the coil bobbin 1 and the usage of the solenoid valve.

Next, a second embodiment of the collar member 20 will be described with reference to FIG. 1 and 6 are denoted by the same reference numerals and description thereof is omitted. The collar member 20 is formed by a cylindrical portion 20C formed in a vertical direction and an annular portion 20D extending horizontally from one end of the cylindrical portion 20C. And the cylindrical portion 20C is a vertical wall 2A.
The annular portion 20 </ b> D faces the inside of the horizontal wall 2 </ b> B (to enter the inside of the horizontal wall 2 </ b> B).
It is arranged along the horizontal wall 2B.

That is, in the annular flange 1C at the other end, the cylindrical portion 20C is disposed inside the vertical wall 2A via the cylindrical portion, and the annular portion extends outward from one end of the cylindrical portion 20C. 20D enters the horizontal wall 2B and extends in the horizontal direction Y-Y along the horizontal wall 2B.

On the other hand, in the annular flange 1C at one end, a cylindrical portion 20C is disposed outside the vertical wall 2A via a cylindrical portion, and an annular portion extending inward from the other end of the cylindrical portion 20C. 20D enters the horizontal wall 2B and extends in the horizontal direction Y-Y along the horizontal wall 2B.

According to the second embodiment, as in the first embodiment, the change amount of the vertical wall 2A with respect to the temperature change of the coil bobbin 1 can be reduced, and the change of the groove width of the annular ring groove 2 can be reduced. Can be suppressed, and good sealing performance in the annular ring groove 2 can be obtained, and further, the following effects can be obtained. That is, by providing the annular portion 20D at one end of the cylindrical portion 20D, the pressure resistance in the radial direction of the collar member 20 could be increased. According to this, the deformation of the vertical wall 2A at the time of temperature change can be more effectively suppressed, and further, the plate thickness of the collar member 20 can be reduced, and the weight increase of the coil bobbin 1 can be prevented as much as possible. It is. Also, an annular portion 20 is provided in the horizontal wall 2B.
According to the arrangement in which D enters, the deformation of the vertical wall 2A at the intersection 2C between the vertical wall 2A and the horizontal wall 2B can be reliably prevented, and the sealing performance of the annular ring groove 2 is further improved. It was something that could be done.

Next, a third embodiment of the collar member 20 will be described with reference to FIG. The collar member 20 includes a cylindrical portion 20C formed in a vertical direction, a first annular portion 20E extending in one horizontal direction YY from one end of the cylindrical portion 20C, and a horizontal annular YY from the other end of the cylindrical portion 20C. The second annular portion 20F extends. The cylindrical portion 20C is disposed along the vertical wall 2A via the cylindrical portion, and the first annular portion 20E and the second annular portion 20F are disposed horizontally along the horizontal wall 2B.

That is, in the annular collar portion 1C at the other end, the cylindrical portion 20C is disposed inside the vertical wall 2A via the cylindrical portion, and the first annular portion 20E and the second annular portion 20E are arranged from both ends of the cylindrical portion 20C. The two annular portions 20F are arranged to extend horizontally inward. In addition, in the annular flange 1C at one end, a cylindrical portion 20C is disposed outside the vertical wall 2A via a cylindrical portion,
A first annular portion 20E and a second annular portion 20F are arranged to extend outward in the horizontal direction from both ends of the cylindrical portion 20C.

According to the present embodiment, the first and second annular portions 20E and 20F are provided at both ends of the cylindrical portion 20C.
The color member 2 is further compared with the color member 20 of the embodiment.
0, which is more preferable in terms of suppressing deformation of the vertical wall 2A and reducing the thickness of the collar member 20.

Next, a fourth embodiment of the collar member 20 will be described with reference to FIG. The collar member 20 includes a cylindrical portion 20C formed in a vertical direction, a first annular portion 20G extending from one end of the cylindrical portion 20C along the horizontal direction Y-Y,
A second annular portion 20H extending from the other end of the cylindrical portion 20C in a horizontal direction YY opposite to the first annular portion 20G.
And

In the annular collar 1C at the other end,
A cylindrical portion 20C is arranged inside the vertical wall 2A via a cylindrical portion, and the first annular portion 20G enters the horizontal wall 2B from one end of the cylindrical portion 20C and goes outward in the horizontal direction YY. The second annular portion 20H is arranged inward from the other end of the cylindrical portion 20C along the horizontal direction YY. On the other hand, in the annular flange 1C at one end, the vertical wall 2
A cylindrical portion 20C is arranged outside the cylindrical portion 20A via a cylindrical portion, and a first annular portion 20G extends from one end of the cylindrical portion 20C in the horizontal direction Y-.
The second annular portion 20H enters the horizontal wall 2B from the other end of the cylindrical portion 20C and is arranged inward along the horizontal direction YY from the other end of the cylindrical portion 20C.

According to the fourth embodiment, the cylindrical portion 20
Since the first annular portion 20G is formed at one end of C and the second annular portion 20H is formed at the other end, the pressure resistance of the collar member 20 can be increased, and the deformation of the vertical wall 2A can be more effectively performed. And the thickness of the collar member 20 can be further reduced. Further, one of the annular portions is connected to the horizontal wall 2.
Since it entered into B, it could surely prevent the deformation of the vertical wall 2A at the intersection 2C of the vertical wall 2A and the horizontal wall 2B. The collar member 20 is formed integrally during the injection molding of the coil bobbin 1.
G and the second annular portion 20H are formed so as to extend in opposite directions in the horizontal direction Y-Y, so that the collar member 20 does not have a bag-shaped portion. The coil bobbin 1 can be formed easily and very easily.

Next, a fifth embodiment will be described with reference to FIG. An annular recess 1N is formed on an annular flange 1C of the coil bobbin 1 around a vertical wall 2A of the annular ring groove 2 through a cylindrical portion.
Is drilled. That is, in the annular flange portion 1C at the other end, an annular concave portion 1N is formed in the vertical wall 2A via the cylindrical portion, and the annular concave portion 1N is formed on the end face 1E of the annular flange portion 1C at the other end. , And is opened on the inner side 1D of the annular flange 1C.
In addition, in the annular flange 1C at one end, an annular recess 1N is formed outside the vertical wall 2A via a tubular portion, and the annular recess 1N opens to the end face 1E of the annular flange 1C at one end. . 21
Is a cylindrical collar member, formed in a donut shape so as to be pressed into the annular concave portion 1N, and formed of, for example, a metal material having a linear expansion coefficient smaller than that of a synthetic resin material. You.

The collar member 21 is press-fitted into the annular recess 1N of the annular flange 1C at the other end and into the annular recess 1N of the annular recess 1C at one end from the opening of the end face 1E. According to the above description, in the annular flange 1C at the other end, the collar member 21 is press-fitted and arranged in the annular recess 1N via the cylindrical portion inside the vertical wall 2A forming the annular ring groove 2. In the annular flange 1C at one end, the collar member 21 is press-fitted and arranged inside the annular recess 1N via the cylindrical portion outside the vertical wall 2A forming the annular ring groove 2.

As described above, similarly to the above-described embodiment, the other end of the annular flange 1C has the vertical wall 2 of the annular ring groove 2.
A between collar A and inner side 1D of annular collar 1C
Is arranged, and a cylindrical portion is formed between the outer peripheral portion of the collar member 21 and the vertical wall 2A. And an annular flange 1C at one end
The vertical wall 2A of the annular ring groove 2 and the annular flange 1
The collar member 21 is disposed between the outer wall 1F and the outer wall 1F, and a cylindrical portion is formed between the inner peripheral portion of the collar member 21 and the vertical wall 2A. Ring groove 2 when temperature changes from
The elastic ring member 1 can suppress the deformation of the groove width of
0 is pressed and held with an appropriate elastic compressive force to obtain good sealing properties. According to the present embodiment, the collar member 21 may be press-fitted into each of the annular recesses 1N opening to the end face 1E from the longitudinal axis direction of the cylindrical portion 1A of the coil bobbin 1, so that the collar member 21 for the coil bobbin 1 Can be mounted very easily. still,
If a magnetic material is used as the material of the collar member 21 disposed in the annular concave portion 1N of the annular flange portion 1C at the other end, the magnetic path area can be increased, so that the performance of the electromagnetic portion (attractive force, responsiveness, etc.) ) Improvement can be measured. At this time, if the inner diameter of the collar member 21 is made substantially the same as the inner diameter of the annular pole piece 5, the performance can be further improved. Further, in the present embodiment, the collar member 21 and the pole piece 5 are formed separately, but may be formed integrally.

[0043]

As described above, according to the synthetic resin coil bobbin in the solenoid valve according to the present invention, the linear expansion smaller than the synthetic resin material around the vertical wall of the annular ring groove of the coil bobbin formed of the synthetic resin material. Since the collar member made of a material having a coefficient is integrally molded, even when the temperature applied to the coil bobbin changes greatly (change in the low temperature direction, change in the high temperature direction), the groove width of the annular ring can be reduced. The change can be suppressed to a small change amount, and a good sealing property of the elastic ring member can be obtained even when the temperature changes.

Further, according to the collar member formed by the cylindrical portion and the annular portion facing the inside of the horizontal wall from one end of the cylindrical portion and extending in the horizontal direction along the horizontal wall, the collar member is formed in the radial direction of the collar member. It is possible to improve the pressure resistance, prevent the vertical wall from being changed at the intersection of the vertical wall and the horizontal wall, and further improve the sealing performance of the elastic ring member.

According to the collar member, the first annular portion extends horizontally from one end of the cylindrical portion and the second annular portion extends horizontally from the other end of the cylindrical portion. The pressure resistance of the collar member can be further increased, which is suitable for improving the sealing property of the elastic ring member and reducing the thickness of the collar member.

Further, the collar member is provided with a first annular portion extending horizontally from one end of the cylindrical portion and a second annular portion extending horizontally from the other end of the cylindrical portion in a direction opposite to the first annular portion. According to this, the sealing property of the elastic ring member is improved, and when the collar member is integrally formed with the coil bobbin, the flow of the synthetic resin material can be maintained well, and the formability of the coil bobbin can be improved. Can be improved.

In the annular flange of the coil bobbin, an annular recess opening around the vertical wall of the annular ring groove at the end face of the annular flange is formed, and a linear expansion coefficient smaller than that of the synthetic resin material in the annular recess. According to the press-fit arrangement of the collar member having the above, the good sealing property of the elastic ring member can be obtained, and the collar member can be easily attached to the coil bobbin, so that the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a coil bobbin made of synthetic resin in an electromagnetic valve according to the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the coil bobbin made of synthetic resin in the solenoid valve according to the present invention.

FIG. 3 is a longitudinal sectional view showing a third embodiment of a coil bobbin made of a synthetic resin in the solenoid valve according to the present invention.

FIG. 4 is a longitudinal sectional view showing a fourth embodiment of a synthetic resin coil bobbin in the solenoid valve according to the present invention.

FIG. 5 is a longitudinal sectional view showing a fifth embodiment of a synthetic resin coil bobbin in the solenoid valve according to the present invention.

FIG. 6 is a longitudinal sectional view of a coil bobbin made of a synthetic resin in a conventional solenoid valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil bobbin 1A Cylindrical part 1C Annular flange 1D Inside 1F Outside 1E End face 1N Annular concave part 20 Collar member 20C Cylindrical part 20D Annular part 20E, 20G First annular part 20F, 20H Second annular part 21 Collar member

Claims (5)

[Claims] 1. A cylindrical portion 1A extending along a longitudinal axis direction XX, an annular flange 1C extending outward from both ends of the cylindrical portion 1A, and an inner side 1D of the annular flange 1C.
Or, a vertical wall 2A that opens toward the outer side 1F and extends along the longitudinal axis direction XX of the cylindrical portion 1, and a horizontal wall 2B that extends along a horizontal direction YY orthogonal to the longitudinal axis direction XX, Coil bobbin 1 comprising an annular ring groove 2 formed by
Is formed of a synthetic resin material; around the vertical wall 2A of the annular ring groove 2, a cylindrical collar member 20 made of a material having a linear expansion coefficient smaller than that of the synthetic resin material.
A coil bobbin made of synthetic resin in an electromagnetic valve, wherein the coil bobbin is integrally formed by molding. 2. The collar member 20 includes a cylindrical portion 20C extending along the vertical wall 2A, and an annular shape extending from one end of the cylindrical portion 20C into the horizontal wall 2B and extending in the horizontal direction YY along the horizontal wall 2B. The coil bobbin made of synthetic resin in the solenoid valve according to claim 1, wherein the coil bobbin is formed by a portion 20D. 3. A cylindrical member 20C extending along a vertical wall 2A, and a first annular portion 20 extending in a horizontal direction YY along a horizontal wall 2B from one end of the cylindrical member 20C.
The synthetic resin in the solenoid valve according to claim 1, characterized in that it is formed by E and a second annular portion 20F extending in the horizontal direction YY along the horizontal wall 2B from the other end of the cylindrical portion 20C. Coil bobbin. 4. A cylindrical member 20C extending along a vertical wall 2A and a first annular portion 20 extending in a horizontal direction YY along a horizontal wall 2B from one end of the cylindrical member 20C.
G and the second annular portion 20 extending from the other end of the cylindrical portion 20C in the horizontal direction YY opposite to the first annular portion 20G.
The coil bobbin made of a synthetic resin in the solenoid valve according to claim 1, wherein the coil bobbin is formed of H. 5. A cylindrical portion 1A extending in the longitudinal axis direction XX, an annular flange 1C extending outward from both ends of the cylindrical portion 1A, and an inner side 1D of the annular flange 1C.
Or, a vertical wall 2A that opens toward the outer side 1F and extends along the longitudinal axis direction XX of the cylindrical portion 1, and a horizontal wall 2B that extends along a horizontal direction YY orthogonal to the longitudinal axis direction XX, Coil bobbin 1 comprising an annular ring groove 2 formed by
Is formed of a synthetic resin material; an annular recess 1N is formed around the vertical wall 2A of the annular ring groove 2 so as to open at the end face 1E of the annular flange 1C, and a synthetic resin is formed in the annular recess 1N. A coil bobbin made of synthetic resin in an electromagnetic valve, wherein a cylindrical collar member 21 made of a material having a smaller linear expansion coefficient than the material is press-fitted.