JPS6044770B2 - How to seal a relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, a terminal block 2 into which a terminal board 1 is inserted is provided with an adhesive injection hole 3 extending from the side to the terminal board 1, and a low-viscosity adhesive 4 is inserted into the adhesive injection hole 3. The adhesive 4 is injected into the gap between the terminal block 1 and the terminal block 2, and the adhesive 4 is applied to the side circumference of the terminal block 2, and then the cover 5 is placed over the terminal block 2 to close the cover. 5 and the side surface of the terminal block top 2 with an adhesive 4, the purpose of which is to bond the terminal board and the terminal board in one application of the adhesive. An object of the present invention is to provide a method for sealing a relay, which can seal a gap with a terminal block and a joint between a cover and a terminal block.

Conventionally, in order to create an airtight relay, it was necessary to seal the gap between the terminal board and terminal block and the joint surface between the cover and the terminal block top separately, which required a lot of time and effort. I had such a problem.

The present invention solves these conventional problems,
Instead of sealing the gap between the terminal block and the terminal block with adhesive from the surface of the terminal block where the terminal block protrudes, the adhesive is applied to the side of the terminal block, which is the joint surface with the cover, and reaches the terminal block. The feature is that the adhesive is injected through an injection hole.

The present invention will be described in detail below based on one example. FIG. 1 shows an exploded perspective view of an embodiment of the present invention. In the figure, reference numeral 1 indicates a plurality of terminal plates insert-molded around a terminal block 2 made of synthetic resin. It passes through the top and bottom. One end of a contact spring 5 is welded and fixed to each of the plurality of terminal plates 1 protruding from the upper surface of the peripheral part of the terminal block 2 at the approximate center, and one end of a contact spring 5 is fixed to each terminal plate 1 by welding. A fixed contact 6 in the form of a rectangular plate is attached, and the movable contact 18 attached to the other end of the contact spring 5 and the fixed contact j6 can come into contact with and separate from each other. A recessed step 7 is formed along the entire circumference of the upper circumferential edge of the terminal block 2, and a side wall 8 of the recessed step 7 is provided with adhesive that extends to each terminal plate 1 inside the terminal block 2. Agent injection holes 3 are formed respectively. In FIG. 1, reference numeral 9 indicates an armature that is rotatably held by inserting a shaft hole 13 into the shaft rod 12 of the support base 11 placed on the top of the excitation coil 10. A yoke plate 15, which is magnetized by excitation of the excitation coil 10, is inserted into the opposing magnetic poles 14 through a gap in which the armature 9 can rotate. By inserting the excitation coil 10 into the recess 16 recessed in the center of the terminal block 2, the armature 9 connects to the terminal plate 1, contact spring 5, etc. protruding from the upper surface of the periphery of the terminal block 2. They are located at approximately the same height. The movable contact 18 can freely come into contact with the pressing projection 17 of the armature 9, and when the armature 9 rotates in a predetermined direction, the movable contact 18 comes into contact with or separates from the fixed contact 6. 20 is a permanent magnet, and 5 is a cover of the terminal block 2.

To attach the cover 5 to the terminal block 2 of the relay configured as described above, first insert the adhesive injection hole 3 leading to the terminal plate 1 inside the terminal block 2 into the terminal block as shown in FIG. 2a.・A hole is made in the side surface of the lock 2, and a low-viscosity adhesive 4 is injected into the adhesive injection hole 3 as shown in FIG. Cross over and apply. At this time, the low-viscosity adhesive 4 enters the gap between the terminal plate 1 and the terminal block 2 at the back of the adhesive injection hole 3 due to capillary action as shown in FIG.
As a result, the gap between the terminal board 1 and the terminal block 2 is sealed. Thereafter, as shown in FIG. 2c, the bottom corner of a box-shaped synthetic resin cover 5 with an open bottom is attached to the recessed step 7 of the terminal block 2 via an adhesive 4. In this way, the terminal block 2 and cover 5 are sealed. In the present invention, as described above, a terminal block into which a terminal block is inserted is provided with an adhesive injection hole extending from the side to the terminal block, and a low viscosity adhesive is injected into the adhesive injection hole to connect the terminal block and the terminal block. Infiltrate the gap between the terminal block and the terminal block with adhesive, and apply the adhesive to the side circumference of the terminal block. Then, place the cover over the terminal block and apply adhesive to the joint between the cover and the side surface of the terminal block. This means that an adhesive injection hole is provided on the side of the terminal block, which is an adhesive injection hole for filling the gap between the terminal block and the terminal board.
Since the part where the adhesive is applied to bond the terminal block and the cover is the side circumference of the terminal block, it is necessary to seal the gap between the terminal block depression and the terminal plate.
The joint surface of the terminal block and the cover can be sealed almost simultaneously by one application of adhesive, which simplifies the work process and reduces work time, as well as reducing manufacturing costs. Because the adhesive injection hole is on the side of the terminal block, there is no adhesive on the surface of the terminal block from which the terminal plate protrudes, and for this reason automatic soldering baths are required. The heat shock when immersed in the terminal block does not apply directly to the terminal block seal, there is no seal leakage, and even if the terminal block symbol is displayed on the surface of the terminal block, it will not be hidden by the adhesive. be.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of an embodiment of the present invention, Figures 2A and b
, c are sectional views for explaining the working steps of the above, and FIG. 3 is an enlarged sectional view showing one operation state of the same. 1 is a terminal board, 2 is a terminal block, 3 is an adhesive injection hole, 4
is the adhesive, and 5 is the cover.

Claims (1)

[Claims] 1. Drill an adhesive injection hole from the side to the terminal block in the terminal block into which the terminal board will be inserted, and inject low-viscosity adhesive into this adhesive injection hole to fill the gap between the terminal board and the terminal block with adhesive. A relay characterized in that an adhesive is applied to the side periphery of the terminal block, and then a cover is placed over the terminal block and the joint between the cover and the side surface of the terminal block is bonded with adhesive. Seal method.