JPH0634205U - Waterproof solenoid - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] The outer circumference is a resin mold part, and the waterproofness at the lead-out end of the lead wire leading from the resin mold part is reduced even when the temperature change is large The purpose is to obtain a highly reliable waterproof solenoid that does not cause this. [Structure] A rubber block is attached to the lead wire lead-out part of the resin mold part.
A rubber boot, a convex portion is provided on the inner wall of the adhered joint portion of the rubber boot, a concave portion is provided on the outer periphery of the lead wire lead-out portion of the resin mold portion, the rubber boot Of the lead wire leading through hole, the resin-based filler is enclosed, and a combination thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof solenoid, and more particularly to the structure of a waterproof solenoid having a resin mold portion on the outer periphery and leading a lead wire.

[0002]

[Prior art]

 Solenoids for hydraulic control, which are built into construction machinery and vehicles, are subject to splashes of muddy water and the temperature changes drastically, resulting in extremely poor water resistance.

(2) FIG. 1 is a sectional structural view of a conventional waterproof solenoid. 1 is a movable iron core, 2 is a fixed iron core, 3 is a coil, 4 is a resin mold portion, 5 is a lead wire, and the fixed iron core 2 is excited by energizing the lead wire 5 to the coil 3. Is a solenoid that controls the hydraulic pressure by operating the movable iron core 1 and the drive shaft integrated with the movable iron core 1. In such a waterproof structure of the solenoid for hydraulic control, after the coil 3 is assembled, the outer periphery is formed as the resin mold portion 4, and the O-ring is provided at the boundary portion between 4 and other components. , Assembled, prevented the ingress of moisture.

However, the lead-out end A of the lead wire 5 connected to the external power source or the like from the resin mode portion 4 has a problem in the waterproof structure. In general, the lead wire 5 is made of a flexible insulating coated electric wire which is connected to the lead-out portion of the winding of the coil 3 by soldering or the like. As another means of the external connection end, there is a lead-out using a metal terminal piece. In this case, it was possible to use an O-ring, but at the external connection end by the lead wire 5 as shown in FIG. Only waterproofing to the extent that the adhesive can be applied was possible.

[0005]

[Problems to be solved by the device]

 The problem to be solved is that due to the temperature change during use (for example, -40 to + 120 ° C), the insulating coating of the lead wire and the mold at the lead end of the lead wire led out from the resin mold part. This is a point that the gap between the resin and the heat shrinkage causes voids and the waterproof property is deteriorated.

[0006]

[Means for Solving the Problems]

 A rubber boot was adhered and connected to the lead wire lead-out portion of the resin mold portion, a convex portion was provided on the inner wall of the adhered joint portion of the rubber boot, and a lead of the resin mold portion. A concave portion was provided on the outer circumference of the wire lead-out portion, a convex portion was provided in the lead wire lead-out through hole of the rubber boot, and the adhered joint portion between the rubber boot and the lead wire lead-out portion was formed. This is due to the fact that a resin-based filler was enclosed in the upper void and each of them was combined. (3)

[0007]

【Example】

 2 is a sectional structural view showing an embodiment of the present invention, and the same reference numerals as those in FIG. 1 denote the same parts. Reference numeral 4'denotes a lead wire lead-out portion of the resin mold portion 4, and 4'is provided with a simultaneously-molded grommet 6 to lead a lead wire 5. A rubber boot 7, which is an essential part of the present invention, is adhered and connected to the lead wire lead-out portion 4 '.

[0008] One or a plurality of convex portions B are provided on the inner wall of the rubber boot 7 in the adhered joint between the rubber boot 7 and the lead derivation section 4 ', and the outer circumference of the lead derivation section 4'. By providing one or a plurality of recesses C in the ridge and combining the protrusions B and the recesses C with each other to provide a binding force, the lead lead-out portion 4'of the resin mold portion 4 and the rubber boots are provided. Increases the effect of blocking the invasion of water that travels between 7.

Further, in order to increase the binding force of the convex portion B and the concave portion C, as shown in a partially enlarged view of the rubber boot 7 and the attached joint portion of the lead lead-out portion 4'in FIG. The inner diameter R2 of the convex portion B is set smaller than the outer diameter R1 of the concave portion 4 '.

Further, in order to enhance the binding force between the rubber boot 7 and the lead wire 5, as shown in a partially enlarged view of the lead wire leading through hole in FIG. The through hole 9 is provided with one or a plurality of protrusions D to increase the effect of blocking the invasion of water transmitted between the lead wire 5 and the rubber boot 7.

Further, in order to improve the preventive property, an appropriate amount of a resin-based filler 8 such as silicone sealant is placed in the space above the adhered joint between the rubber boot 7 and the lead wire lead-out portion 4 ′. It can be enclosed by coating or the like.

Each of the convex portions B, the concave portions C, the convex portions D, and the resin-based filler 8 for improving the waterproof property (4), the rubber wire 7 is attached to the lead wire lead-out portion 4 ′. The basic structure of the present invention to be combined can be selectively used alone or in combination.

The solenoid to which the structure of the present invention can be applied is not limited to a hydraulic control solenoid as shown in the drawings, but basically, a movable iron core, a fixed iron core, and a coil of a resin mold portion are used. Solenoid consisting of general-purpose. Further, changes in the shape of each part, addition of other parts, conversion of arrangement, etc. are included in the scope of the present invention within the scope of the gist of the present invention.

[0014]

[Effect of device]

 As described above, since the waterproofness at the lead-out end of the lead wire led out from the resin mold is maintained against a large temperature change, a solenoid incorporated in a vehicle or construction machinery that is susceptible to splash of muddy water etc. It has a great industrial effect by being used for various waterproof solenoids.

[Brief description of drawings]

FIG. 1 is a cross-sectional structural view of a conventional waterproof solenoid.

FIG. 2 is a sectional structural view showing an embodiment of the present invention.

FIG. 3 is a partially enlarged view of a lead wire through hole portion of a rubber boot.

FIG. 4 is a partially enlarged view of an adhered joint portion of a rubber boot and a lead lead-out portion.

[Explanation of symbols]

1 movable iron core 2 fixed iron core 3 coil 4 resin mold part (5) 4'4 lead wire lead-out part 5 lead wire 6 grommet 7 rubber boots 8 resin filler 9 7 lead wire Through hole A Lead wire outlet end B Convex portion of inner wall of rubber boot (attached joint to lead wire lead portion) C Recess outer periphery of lead lead portion D Lead wire lead through rubber boot Convex part of hole R1 B outer diameter R2 C inner diameter

Claims (5)

[Scope of utility model registration request] 1. A waterproof solenoid comprising at least a movable iron core, a fixed iron core, and a coil, the outer periphery of which is a resin mold portion, wherein a lead wire lead-out portion of the resin mold portion is covered with a rubber boot. A waterproof solenoid characterized by being bonded and coupled. 2. The waterproof solenoid according to claim 1, wherein one or a plurality of protrusions are provided on the inner wall of the rubber boot at the adhered joint portion of the rubber boot. 3. The one or more recesses are provided on the outer circumference of the lead wire lead-out portion of the resin mold portion in the adhered joint portion of the rubber boot. 2 waterproof solenoids. 4. The waterproof type according to claim 1, wherein the through hole for leading out the lead wire of the rubber boot is provided with one or a plurality of protrusions. solenoid. 5. A resin-based filler is enclosed in a space above the adhered joint between the rubber boot and the lead wire lead-out portion, and the resin-based filler is enclosed therein. The waterproof solenoid according to claim 4.