JPH0616783U - Bobbin for solenoid coil and solenoid valve using the same - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a bobbin for a solenoid coil capable of maintaining insulation between a coil portion and an outer conductive member after molding and preventing deterioration of insulation resistance, and a solenoid valve using the bobbin. A bobbin 1 for a solenoid coil used in a solenoid valve, in which collars 4 and 5 are formed at both ends of a coil portion 3 around which a solenoid coil 2 is wound, and one of the collars 4 and 5 is a solenoid. Two connecting pins 6 and 7 for connecting the winding start and winding end portions of the coil 2 are vertically provided. A horizontal step 8 is provided on the outer peripheral portion of the collar 4 provided with the connecting pins 6 and 7 so that the end face side of the bobbin 1 is lowered toward the center, so that the resin material at the time of molding can sufficiently enter. It has a structure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid coil bobbin, and particularly to a solenoid coil bobbin used in a solenoid valve, which uses a solenoid coil bobbin capable of preventing deterioration of insulation resistance between a coil portion and an outer conductive member. The technology is effective when applied to solenoid valves.

[0002]

[Prior art]

 For example, a solenoid valve that uses a solenoid coil bobbin is composed of a solenoid that is the source of electromagnetic force, a valve body that switches the flow of fluid, and the like. A bobbin around which is wound, a fixed iron core fixedly provided in a center hole formed in the bobbin, and a movable iron core displaceably provided along the axial direction of the center hole are housed. .

For assembling the solenoid portion in such an electromagnetic valve, for example, a bobbin around which a solenoid coil is wound and a diode for rectification and surge protection connected to the solenoid coil are made of a resin material such as epoxy resin. Sealed to form the solenoid portion of the molded structure.

Further, when winding the solenoid coil around the bobbin, first, the terminal portion (winding start portion) of the solenoid coil is connected to one of the connecting pins provided on the collar of the bobbin, and the multilayer coil is formed by winding a plurality of times. After winding the structure, the end of the winding is connected to the other connecting pin to complete the assembly of the solenoid coil bobbin for molding.

[0005]

[Problems to be solved by the device]

 However, in the prior art as described above, since the space between the connection pin provided on the collar of the solenoid coil bobbin and the solenoid frame after molding is narrow, the resin material is not sufficiently inserted during molding. There is also the problem that sufficient insulation cannot be obtained due to the lack of adhesion or peeling due to the lack of complete adhesion.

In order to improve the insulation, it is considered to provide a protrusion on the collar of the bobbin between the connection pin and the solenoid frame, for example. When connecting to, there is a problem that the projection is an obstacle and assembly workability is poor.

Therefore, an object of the present invention is to form a coil portion and an outer conductive portion material even if the bobbin and the resin material are not completely adhered to each other or the resin material is peeled off after molding with a resin material or the like. It is an object of the present invention to provide a bobbin for a solenoid coil capable of maintaining insulation and preventing deterioration of insulation resistance, and a solenoid valve using the bobbin.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0009]

[Means for Solving the Problems]

 Of the devices disclosed in the present application, the outline of a typical one will be briefly described as follows.

That is, the solenoid coil bobbin according to the present invention is a solenoid coil bobbin in which a collar is formed at both ends of a coil portion around which the solenoid coil is wound, and the bobbin is provided on a part or the entire circumference of the outer periphery of the collar. In this, a step is formed in which the end surface side of the solenoid coil bobbin is lowered toward the center, and a molding resin material or an insulating material is inserted into this step.

The solenoid valve of the present invention uses the solenoid coil bobbin, and a fixed core and a movable core that are fixedly or movably provided in a central hole formed in the solenoid coil bobbin are stored. It is provided with a solenoid portion which is a source of generation of electromagnetic force and a valve main body portion which switches the flow of fluid.

[0012]

[Action]

 According to the solenoid coil bobbin and the solenoid valve using the bobbin, the resin material or the insulator is inserted into the stepped portion provided on the collar of the bobbin, so that the coil portion around which the solenoid coil is wound is formed. It is possible to insulate the outer portion of the coil portion from a conductive member such as an iron core.

That is, by forming a step on the end face side of the bobbin, the conventional workability problem can be solved, and even if peeling from the resin material or the insulating material occurs, when the insulation length is flat as in the conventional case. Since it is longer than that of the above, it is possible to prevent deterioration of the insulation characteristic between the connection pin and the solenoid frame.

This makes it possible to prevent the insulation of the solenoid coil bobbin from deteriorating and to obtain a solenoid valve having excellent insulation resistance.

[0015]

【Example】

 1 (a) and 1 (b) are a side view and a front view showing a solenoid coil bobbin according to an embodiment of the present invention, and FIG. 2 is a partial sectional view showing a solenoid valve using the bobbin of the present embodiment. 3 is an enlarged view showing in detail the stepped portion of the bobbin of this embodiment.

First, the structure of the solenoid coil bobbin of this embodiment will be described with reference to FIG.

The solenoid coil bobbin of the present embodiment is, for example, a bobbin 1 for a solenoid coil used in an electromagnetic valve, and flanges 4 and 5 are formed at both ends of a coil portion 3 around which a solenoid coil 2 is wound. Two connection pins 6 and 7 for connecting the winding start and winding end portions of the solenoid coil 2 are vertically provided on one of the flanges 4 and 5.

Then, for example, a horizontal step 8 whose end face side of the bobbin 1 is lowered toward the center is provided on the outer peripheral portion of the collar 4 provided with the connection pins 6 and 7, and the step 8 is molded by molding. The structure is such that the resin material at that time can fully penetrate.

The bobbin 1 configured as described above has a fixed iron core 9 fixedly provided in a central hole formed in the bobbin 1 and movable in the axial direction as shown in FIG. The movable iron core 10 provided is housed and used in a solenoid valve 14 having a solenoid portion 12 which is an electromagnetic force generation source in a solenoid frame 11 and a valve body portion 13 which switches the flow of fluid.

Next, with respect to the operation of this embodiment, a procedure for actually assembling the solenoid valve 14 will be described.

First, when the solenoid coil 2 is wound around the bobbin 1, the terminal portion of the winding start portion of the solenoid coil 2 is connected to one connection pin 6 provided on the collar 4 of the bobbin 1. Then, after winding in a multi-layer structure by a plurality of windings, the terminal end at the end of winding is connected to the other connecting pin 7.

Further, by assembling the bobbin 1 of the solenoid portion 12 for molding by connecting the electronic parts 15 such as a diode for rectification and surge protection to the connecting pins 6 and 7 of the bobbin 1. To do.

In this case, since there are no obstacles such as protrusions around the connection pins 6 and 7 as in the conventional case, the connection processing of the terminal portion of the solenoid coil 2 can be easily performed, and there is a problem in assembling workability. Can be solved.

Subsequently, in assembling the solenoid portion 12, the bobbin 1 around which the solenoid coil 2 is wound, the electronic component 15 connected to the solenoid coil 2 and the like are sealed with a resin material 16 such as epoxy resin, This forms the solenoid part 12 of the molded structure.

In this molding step, since the resin material 16 also serving as an insulating function can be easily inserted into the step 8 provided on the collar 4 of the bobbin 1, the coil portion 3 around which the solenoid coil 2 is wound, particularly the bobbin. It is possible to insulate between the connecting pins 6 and 7 of 1 and the conductive members such as the solenoid frame 11, the fixed iron core 9, and the movable iron core 10.

That is, conventionally, when the resin material 16 is peeled off due to its flatness, the insulation characteristic between the connection pins 6 and 7 and the solenoid frame 11 is deteriorated. However, in this embodiment, As shown in FIG. 3, the insulation length can be set to the dimension (B + C + D), which is longer than the conventional dimension A, so that the insulation characteristic can be prevented from being deteriorated.

Finally, the solenoid portion 12 and the valve body portion 13 formed separately are coaxially connected to each other, whereby the movable iron core 10 is displaced by the electromagnetic force generated by the solenoid portion 12. In the valve body 13, the manufacture of the solenoid valve 14 capable of switching the flow of fluid such as air pressure is completed.

Therefore, according to the bobbin 1 for the solenoid coil of the present embodiment, by providing the step 8 on the outer peripheral portion of the collar 4 on which the connecting pins 6 and 7 of the bobbin 1 are provided, the insulation length can be reduced to the conventional one. Since the resin material 16 is longer than that of the bobbin 1 and the resin material 16 can easily intrude into the bobbin 1, the insulation of the bobbin 1 can be prevented from deteriorating, and particularly, the insulation resistance of the solenoid valve 14 can be improved.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, with respect to the bobbin 1 for the solenoid coil of the present embodiment, the case where the horizontal step 8 is provided on a part of the collar 4 of the bobbin 1 has been described, but the present invention is limited to the above embodiment. Instead of the horizontal step 8, it is widely applicable to the case where a step difference is provided on the entire circumference of the outer peripheral portion of the collar.

Needless to say, in order to obtain insulation between the coil portion 3 and the solenoid frame 11, for example, an insulating material other than the resin material 16 can be applied.

In the above description, the invention mainly made by the present inventor is applied to the bobbin 1 for the solenoid coil used in the electromagnetic valve 14 which is the field of use, but the invention is not limited to this. However, the present invention can be widely applied as a bobbin for solenoid coils of other devices such as directional control valves, and also for other solenoid devices for which insulation resistance is particularly required.

[0033]

[Effect of device]

 The effects obtained by the representative one of the inventions disclosed in the present application will be briefly described as follows.

That is, a step whose end face side of the bobbin is lowered toward the center is provided on a part or the entire circumference of the outer periphery of the collar of the solenoid coil bobbin, and a resin material or an insulating material for molding is provided on the step. By inserting the, it is possible to insulate between the coil portion and the conductive member on the outer periphery of the coil portion, so that it is possible to prevent deterioration of the insulation of the solenoid coil bobbin.

As a result, in particular, the fixed iron core and the movable iron core are housed, and by applying the solenoid valve to the solenoid valve that is the source of the electromagnetic force and the valve body that switches the flow of the fluid, It is possible to obtain a solenoid valve having excellent insulating properties.

[Brief description of drawings]

1A and 1B are a side view and a front view showing a bobbin for a solenoid coil according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a solenoid valve using the bobbin of this embodiment.

FIG. 3 is an enlarged view showing in detail a step portion of the bobbin of this embodiment.

[Explanation of symbols]

 1 Bobbin 2 Solenoid coil 3 Coil part 4,5 Tsubo 6,7 Connection pin 8 Step 9 Fixed iron core 10 Movable iron core 11 Solenoid frame 12 Solenoid part 13 Valve body part 14 Solenoid valve 15 Electronic component 16 Resin material

Claims (2)

[Scope of utility model registration request] 1. A bobbin for a solenoid coil, in which a collar is formed at both ends of a coil portion around which a solenoid coil is wound, the bobbin for the solenoid coil being provided on a part or the entire circumference of an outer peripheral portion of the collar. A step is provided in which the end face side is lowered toward the center, and a resin material or an insulating material for molding is inserted into the step portion to insulate between the coil part and a conductive member outside the coil part. Bobbin for solenoid coil. 2. A bobbin for a solenoid coil according to claim 1, wherein a fixed iron core and a movable iron core, which are fixedly or movably provided in a central hole formed in the bobbin for the solenoid coil, are housed, and electromagnetic force is applied. An electromagnetic valve, comprising: a solenoid portion that is a generation source; and a valve body portion that switches the flow of fluid.