JPS60198029A - Sealed electric device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sealed electrical device equipped with an air vent.

<Prior art and its problems> Conventionally, as shown in FIG.
Insert the protruding base 31 into the open end 33 of the case 32 (
In a sealed electrical device that is recessed and fitted and forms a sealant layer 34 on the outer surface of the paste 31, when the base 31 is provided with an air vent hole 35 for venting the air inside the case 32, To prevent the seal agent from flowing into the air vent hole 35, the air vent hole 35f: the sealant layer 3
Seven air vent lead-out cylinder parts 36 for leading out onto the surface of the base 31 are formed on the base 31. The air vent lead-out cylindrical portion 36 is finally dissolved and closed by pressing the ultrasonic head 37, as shown in FIG.

However, in the above structure, when the air vent outlet cylindrical part 36t is melted to form the closing part 36a, the lower end of the ultrasonic head 37 comes into contact with the sealant layer 34, as shown in FIG. When cracks occur in the sealant layer 34 at the contact portion 38, the cracks are propagated to the inner surface 39 of the case 32 and the external terminals 30, and the sealing effect inside the case 32 may be impaired at those portions. Rarely.

<Object of the invention> This invention was made in order to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a sealed electric device that can prevent cracks from forming in the sealant layer by avoiding contact between an ultrasonic head and the sealant layer.

<Structure and Effects of the Invention> In order to achieve the above object, the present invention surrounds the air vent lead-out cylindrical part and isolates it from the sealant layer, and also includes a partition wall into which the ultrasonic head is fitted. It was integrally formed with the cylindrical portion in advance on the pace.

With such a configuration, when the air vent lead-out cylinder is melted and closed with an ultrasonic head, the ultrasonic head does not come into contact with the sealant layer, so no dents occur in the sealant layer. The sealing effect inside the case is maintained normally.

<Explanation of Examples> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a partially cutaway side view of a sealed electrical device according to an embodiment of the present invention. In this figure, 10 is a pace made of synthetic resin, and this pace 10 is provided with an electric device body 11 such as an electromagnetic relay. The electrical device main body 11 is covered with a case 712 made of synthetic resin, and the pace 10 is fitted into the open end 13 of the case 12 by a certain amount H. The electrical equipment main body 11
Various external terminals 14 protrude from the outer surface of the pace 10. Fig. 2 is a perspective view of Fig. 1 of the company;

As clearly shown in FIG. 3, on the outer surface of the pace 10, there is provided a cylindrical part 16 for guiding the air vent hole 15 provided in the pace 10 upward, and a cylindrical part 16 for leading out the air vent hole. Sealing agent layer 1 on pace 10 surrounding concentrically
7 and the ultrasonic head (Fig. 4) 18
A partition wall 19 that can be fitted into the partition wall 19 is integrally formed in advance.

In the above configuration, as shown in FIG.
The opening end 13 of the paste 1 is used as a sealant outflow prevention wall.
This is to form a sealing agent layer 17 of a predetermined thickness on the outer surface of 0. When the sea μ agent is injected onto the base 10, the sea μ agent cannot flow into the annular recess 20 inside the partition wall due to the partition wall 19. When the sealant layer 17 is formed, this seals each external terminal protrusion of the paste 10 and the paste 10.
The mating portion between the case 12 and the case 12 is hermetically sealed. After the air inside the case 12 has been vented through the air vent hole 15, the air vent groove opening tube portion 16 is melted by pressing the ultrasonic head 18 as shown in FIG.
This is the closed portion 16a. At this time, the ultrasonic head 18
II'i Since it is applied to the air vent outlet cylindrical part 16 in the partition wall 19 where there is no sealant layer 17, 7 A/agent layer 17
No crash occurs. FIG. 5 shows a state in which the ultrasonic head 18 of FIG. 4 has been removed.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of a sealed electrical device according to an embodiment of the present invention, Fig. 2 is a perspective view of Fig. 1, and Fig. 3 is a view centered on the air vent portion of Fig. 1. 4 and 5 are enlarged views of the main parts; FIGS. 4 and 5 are cross-sectional views showing the air vent hole in Fig. 3 in a closed state; FIG. 6 is a cross-sectional view of the main parts showing the conventional air vent hole; and FIG. FIG. 3 is a sectional view showing a conventional air vent hole in a closed state. DESCRIPTION OF SYMBOLS 10... Pace, 12... Case, 13... Opening end, 14-... External terminal, 16... Air vent lead-out cylinder part, 17... Sealing agent layer, 18-... Ultrasonic head, 19... septum. Figure 1 1'1 Figure 2 Figure 3

Claims (1)

[Claims] (1) In a sealed electrical device in which a base with external terminals protruding from the outer surface is inserted and fitted into the open end of the case, and a sealant layer is formed on the outer surface of the paste, the base is melted by ultrasonic waves. A cylindrical part for the air vent hole to be closed and closed, and a partition wall that surrounds the cylindrical part for leading out the air vent hole and isolates it from the sealant layer, and into which the ultrasonic head is inserted are installed in advance on the outer surface of the pace. A sealed electrical device characterized by being integrally formed.