JPS5838514Y2 - electromagnetic relay - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed structure for a sealed electromagnetic relay.

As shown in Fig. 1, a conventional sealed electromagnetic relay has a cover opening made of synthetic resin that is raised higher than the external surface of the mounting base or fixed terminal block 1, with a boundary area, and the relay is surrounded by the boundary area. It has a structure in which the entire surface of the concave shape is filled with filler material 5 in the gap between the cover 2 and the mounting base 1 and the gap between the mounting base 1 and the terminal 4.

However, this structure requires a large amount of filler and has the contradictory aspects of allowing the filler to completely flow into the gap while preventing the filler from flowing out to unnecessary areas.
This method has the drawback of increasing manufacturing costs because it requires higher precision parts and control of the viscosity of the filler.

The present invention was devised in view of these drawbacks, and uses an insulator having a filler injection hole, and by simply flowing a small amount of filler through the injection hole, the gap can be sealed and the injection hole can be closed. The present invention provides an inexpensive sealed electromagnetic relay.

FIG. 2 is a partially cutaway sectional view of the electromagnetic relay according to the present invention, in which 1 is a mounting base for fixing the electromagnetic relay body 6, 2 is a cover, 3 is an insulating seat, 4 is a terminal, and 5 is a filler. It is a material.

FIG. 3 is an exploded perspective view showing the assembly structure of the present invention, which is assembled by housing the electromagnetic relay main body 6 in the cover 2 and inserting the terminal hole 3a of the insulating seat 3 into the terminal 4.

FIG. 4 is a partially enlarged cross-sectional view after the assembly shown in FIG. 3, and as is clear from FIG.
A slight gap A is formed between the insulating seat 3 and the insulating seat 3.

In this state, when the filler 5 is injected from the injection port 3b of the insulating seat, the filler 5 is transferred to the gap A, the gap B between the terminal hole 3a of the insulator and the terminal 4, and the cover opening periphery 2b due to capillary action. The filling material 5 evenly flows into the gap C between the insulating seat 3 and the filling material 5, and is then heated or left at room temperature to harden and seal the filling material 5.

As mentioned above, the electromagnetic relay of the present invention is capable of sealing each component with an extremely simple method of applying a small amount of filler to the filler injection hole, and is highly mass-producible and can be manufactured at low cost. The practical effect is extremely large.

5, 6, and 7 show other embodiments of the present invention, and FIG. 5 shows an embodiment in which a step 2C is provided to position the insulating seat 3 inside the opening of the cover 2. This is so that the gap A between the insulating seat 3 and the insulating seat 3 can be inevitably secured.

Figure 6 shows that the insulating seat 3 is inserted inside the open part of the cover 2,
A gap A between the insulating seat 3 and the mounting base 1 is secured by a plurality of protrusions 1a provided on the mounting base 1 or a plurality of protrusions 3C provided on the insulating seat 3 side.

Note that the flow of the filler 5 injected from the filler injection hole 3b is obstructed by the terminal 4 of the mounting base 1, and the flow of the filler 5 injected from the filler injection hole 3b is blocked depending on the direction.
If the flow is uneven, as shown in FIGS. 8 and 9, the protrusion 1a provided on the mounting base 1 or the protrusion 3C provided on the insulating seat 3 should be moved around the filler injection hole 3b. By providing the terminal 4 in a portion where interference by the terminal 4 is small, uneven flow of the filling material 5 can be prevented and the flow of the filling material 5 can be made uniform.

The length L of the convex portion 1a or 3C is the filler material 5 in each direction.
Set so that the flow is even.

Further, FIG. 7 shows that the filling material can be reduced by providing uneven parts 1b and 3e on the entire surfaces of the mounting base 1 and the insulating seat 3 in contact with the cover 2, and providing uneven parts IC and 3d on the opposing surfaces of the mounting base 1 and the insulating seat 3, respectively. The adhesive area is increased, and the adhesive strength and adhesion are further improved.

[Brief explanation of drawings]

FIG. 1 shows a conventional sealed electromagnetic relay partially cut away, and FIG. 2 shows a partially cut away electromagnetic relay according to the present invention. FIG. 3 is an exploded perspective view showing the assembled structure of the electromagnetic relay of the present invention, and FIG. 4 is a partially enlarged sectional view of FIG. 3 after assembly. 5, 6, 7, 8 and 9 show other embodiments of the present invention. 1 is a mounting base for fixing the electromagnetic relay body, 2 is a cover, 3
is an insulating seat, 3a is a terminal insertion hole, 3b is a filler injection hole, 4
5 is a terminal, 5 is a filling material, 6 is an electromagnetic relay main body, and A, B, and C are gaps formed by the insulating seat 3 and the parts that are in contact with each other.

Claims (1)

[Scope of utility model registration request] 1. Lead out the terminal to the outside of the mounting base, pass the terminal through the terminal hole of the insulating seat provided at a position corresponding to the terminal, and insert the terminal into the opening inner wall of the mounting base and the cover that is in contact with the surface of the insulating seat, and the insulating seat. An electromagnetic relay characterized in that a filler is injected from a filler injection hole provided in the insulating seat into the gap formed by the inner wall of the provided terminal hole and the terminal to seal all the gaps. . 2. The electromagnetic relay according to claim 1 of the utility model registration, characterized in that the mounting base or the insulating seat is provided with a convex portion or a convex portion.