JPH076591Y2 - Insulation device in electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an insulating device in an electromagnetic relay, and in particular, an electromagnetic device in which a through hole is provided inside an insulating wall to prevent water droplets from staying. It relates to an insulation device in a relay.

[Prior Art] In recent years, insulating properties in electromagnetic relays have been emphasized. In particular, in an electromagnetic relay for high voltage, various measures are taken to improve the insulation between output terminals. Attachment 5
The figure shows a conventional electromagnetic relay. Reference numeral (1) is a resin main body case, and coil terminals (2) and (2) and output terminals (3) and (3) are provided on the upper surface of the main body case so as to project,
Insulating walls (4) (4) ... Are erected around the periphery of (3). Since the output terminals (3) and (3) are surrounded by the insulating walls (4), (4) ...
The creepage distance between (3) becomes long and the insulation distance is secured.

[Problems to be Solved by the Invention] In the above-mentioned conventional electromagnetic relay, the insulating distance is secured by the insulating walls (4) (4). However, in recent years, the installation environment of the electromagnetic relay has spread, and it is increasingly used under adverse conditions such as high temperature or high humidity. In a humid environment, water droplets are generated around the output terminals (3) and (3), and the water droplets are retained inside the insulating walls (4) (4) ... 3) There is a risk of short-circuiting between them.

Therefore, there is a technical problem to be solved in order to provide an electromagnetic relay in which the creepage distance between the output terminals is increased and the short circuit due to the retention of water drops is prevented, and the present invention solves this problem. The purpose is to do.

[Means for Solving the Problems] This invention has been proposed in order to achieve the above-mentioned object, in which output terminals are provided so as to project from the upper surface of the main body case, and an insulating wall surrounds each output terminal. In the enclosed electromagnetic relay, the upper surface of the main body case and one side of the insulating wall are extended outward, and a through hole is opened in the upper surface of the extended main body case, and a lower surface of the through hole is formed. It is intended to provide an insulating device in an electromagnetic relay, which is characterized in that an insulating wall is vertically provided on the side.

[Operation] In this invention, the upper surface of the main body case and one side portion of the insulating wall are extended outward, and the through hole is opened in the upper surface of the extended main body case. The insulating wall shields the output terminals from each other and surrounds the periphery of each output terminal to increase the creepage distance between the output terminals. When the electromagnetic relay of the present invention is used in a humid environment or a place where there is a danger of flooding, the water droplets around the output terminals once fall inside the insulating wall, and then the outside of the body case through the through hole. Outflow to. Therefore, it is possible to prevent water droplets from staying inside the insulating wall and to overflow from the insulating wall, thereby preventing a short circuit between the output terminals and maintaining high insulation.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to FIGS. 1 to 4 of the attached drawings. In FIGS. 1 to 3, reference numeral (10) is a body case of the electromagnetic relay, which is made of resin and has a coil terminal (1) formed on an upper surface (11) of the body case (10).
2) (12) and output terminals (13) (13) are provided in a protruding manner. In the middle position of the output terminals (13) (13), an insulating wall (1
4) is erected and shielded, and each output terminal (13) (1
Insulating walls (15) (16) (17) (18) are erected around and surrounded by 3). Also, as shown in Fig. 2, output terminal (13)
The upper surface (19) (19) of the portion on which (13) is projected has one side portion thereof extending outward, and the insulating wall (14) (16)
(17) is also extended in the same direction.

The insulating wall (14) at the extended portion is the outer insulating wall (1
At the position where it abuts against 5), the extended upper surface (19) (1
Through holes (20) (20) are opened in 9). A part of the insulating wall (15) is vertically extended to form an insulating wall (15a), and a part of the insulating wall (14) is also penetrated through the through holes (20) (2).
The insulating wall (14a) is formed by being hung on the lower surface side of the space (0).

FIG. 4 is a perspective view of the main part of the AA line in FIG. 2, in which the insulating wall (15a) and the insulating wall (14a) are joined in a T-shape when viewed from the bottom. Both ends of the insulating wall (15a) have through holes (20) (2).
0) is extended to the left and right, and the insulating wall (14a) is also provided longer than the edge of the through holes (20) (20) toward the main body case (10). However, the body case (10) and the insulating wall (14
There is a gap of size l between a).

Thus, when the electromagnetic relay of this embodiment is used, for example, for opening and closing a magnetron built in a microwave oven, a high voltage is applied to the output terminals (13) (13), but the insulating wall ( Since the output terminals (13) and (13) are surrounded by 14), (15), (16), (17) and (18), respectively, the creepage distance is large and high insulation is maintained. And when using in a humid installation place, even if water droplets are generated around the output terminals (13) (13), the water droplets that have dropped onto the upper surfaces (19) (19) will come from the through holes (20) (20). It flows out of the body case (10). At that time, since the insulating walls (14a) and (15a) are vertically provided also on the lower surface side of the through holes (20) (20), the through holes (20)
A long creepage distance can be secured even if a space is created by opening (20), and the insulation does not deteriorate. Moreover, as shown in FIG. 4, water droplets are transmitted along the intersecting lines (21) and (21) where the insulating wall (14a) and the insulating wall (15a) are joined, and the insulating wall (14a) and the main body case ( In combination with the provision of a gap of size l with the main body case (10), the risk that water droplets flowing out from the through holes (20) (20) will soak into the main body case (10) is eliminated.

It should be noted that the present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modified version.

[Effects of the Invention] As described in detail in the above-mentioned one embodiment, the present invention is configured such that the upper surface of the main body case on which the output terminal is projecting and the insulating wall surrounding the output terminal are respectively extended outward and extended. A through hole is opened in the upper surface. Therefore, when used in a humid environment or in a place where there is a risk of flooding, even if water droplets are generated around the output terminals, the water droplets will fall inside the insulating wall and then from the through hole to the outside of the main body case. There is no risk of water droplets spilling out to water, and water droplets staying and short-circuiting the output terminals. Moreover, since the insulating wall is hung vertically on the lower surface side of the through hole, the creepage distance between the output terminals is long and high insulation is secured, and high voltage can be used under humid conditions. It is a device with various practical values such as.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a plan view of an electromagnetic relay, FIG. 2 is a cutaway side view of the same portion, FIG. 3 is a rear view of the same, and FIG. FIG. 3 is a perspective view of the main part of line AA in FIG. FIG. 5 is a perspective view of a conventional electromagnetic relay. (10) …… Main body case, (11) (19) …… Upper surface (13) …… Output terminal, (20) …… Through hole (14) (15) (16) (17) (18) (14a) (15a) …… Insulating wall

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic relay in which output terminals are provided so as to project from an upper surface of a main body case and each output terminal is surrounded by an insulating wall, wherein the upper surface of the main body case and one side of the insulating wall are outside. 1. An insulating device in an electromagnetic relay, characterized in that it extends in a direction, a through hole is opened in the upper surface of the extended main body case, and an insulating wall is provided vertically on the lower surface side of the through hole.