JPH0537543Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention involves mounting various circuit members including a terminal board in a case whose one side is an opening, and connecting branches of the terminal board to the opening of the case. This invention relates to a sealing mechanism for a filter that protrudes from a surface.

<Prior art> Conventionally, when assembling the filter a, various circuit members are housed in a case b as shown in FIG. f and blocking the open surface d with a sealing plate e;
After that, a molding material was sealed in the opening surface d.

By the way, when filling the opening surface d with the molding material, it is necessary to prevent the molding material from entering the case b through the gap between the insertion hole f of the sealing plate e and the connecting branch c. For this reason, Noryl (filling resin agent) h was injected into the gap to prevent the molding material filled into the opening surface from entering into the case b.

<Problems to be solved by the invention> However, with such a configuration, it is necessary to inject Noryl H into a minute gap, and it is not always possible to inject it tightly, resulting in poor sealing and the opening. The molding material filled on the surface sometimes leaked into the case.

The object of the present invention is to provide a sealing mechanism that can achieve more complete sealing.

<Means for Solving the Problems> In the present invention, an insertion hole through which a connecting branch is inserted is formed, and a slit extending in the X and Y directions surrounds the insertion hole. A rectangular circumferential portion is formed as a section, and an inner sealing plate is formed with an adjustment hole formed at the intersection of the center lines of the slits in the X direction and the Y direction, and an insertion hole through which the connecting branch piece is inserted. The present invention is characterized in that an external sealing plate is sequentially fitted onto the opening surface of the case, and a molding material is further injected to close the opening surface.

<Function> Since the connecting branch pieces are doubly inserted into the insertion holes of the internal sealing plate and the external sealing plate and protrude from the opening surface, the connecting branch pieces are inserted from the gap between the insertion hole and the branch pieces. Intrusion of mold material is eliminated as much as possible.

Incidentally, the insertion holes formed on each sealing plate into which the connecting branches are inserted do not necessarily match due to formation errors or installation errors. However, since the rectangular periphery of the internal sealing plate can be slightly moved by the slits extending in the X and Y directions, this error can be absorbed and the two sealing plates can be inserted without any hindrance to the branch pieces. It can now be inserted through the hole. Furthermore, in order to ensure a large allowable movement in the plane direction of the rectangular peripheral part, the degree of freedom of the rectangular peripheral part can be improved by cutting the inner edge of the slit so that it is continuous with the adjustment hole. . Therefore, if there is a large error in the insertion hole, it can be easily dealt with by such a cutting process.

Furthermore, since the rectangular peripheral portion is allowed to move in the plane direction, the peripheral shape of the internal sealing plate can be made larger than the opening surface of the case in advance. The periphery of the internal sealing plate comes into close contact with the inner surface of the opening of the case, improving sealing performance.

<Example> An example of the present invention will be described with reference to FIGS. 1 to 4.

One side of the case 2 of the filter 1 is an opening surface 3, and inside the case 2, for example, in the case of a ladder-type filter 1, circuit members such as a series resonator and a parallel resonator are installed as shown in FIG. 4, a terminal plate 5 for electrically connecting each member to an external circuit is mounted, and its connecting branch 6 protrudes from the opening surface 3.

An internal sealing plate 7 through which the connecting branch 6 is inserted is fitted into the opening surface 3 .

As shown in FIGS. 2 and 3, the internal sealing plate 7 has a rectangular insertion hole 8 through which the connecting branch 6 is inserted.
is formed at a predetermined position, and slits 10x and 10y in the X and Y directions are formed around the four circumferences.
It has a rectangular shape. Said slit 1
A plurality of slits 0x and 10y are arranged so as to surround each insertion hole 8, and the rectangular peripheral portion 9 including the insertion hole 8 can be slightly moved by the slits 10x and 10y.

Also, in the center, each slit 10x, 10y
An adjustment hole 11 is formed at the intersection of the center lines. As a result, by cutting the inner deep edge of the slit 10 deeply and connecting it to the adjustment hole 11 as necessary, the degree of freedom of the rectangular peripheral part 9 is improved, and the movement in the plane direction can be adjusted without difficulty. The amount of adjustment increases.

That is, if we take the rectangular circumferential portion 9a in the center of FIG. 3 as an example, the rectangular circumferential portions 9a, 9a
is allowed to move slightly in the X direction by the slits 10y, 10y on both sides, but if you want to increase the degree of freedom of this movement, the slit 10y on one side
By cutting x and a slit 10x on the center side and connecting it to the adjustment hole 11a, and connecting it to the main part of the internal sealing plate 7 only at the section f, the bending of the section f causes the section f to be centered. The rectangular peripheral portion 9a may be tilted.

In this way, since the position of each insertion hole 8 in the internal sealing plate 7 can be adjusted, some errors can be adjusted in the installation state. It is also possible to form many holes 8.

Alternatively, the insertion hole 8 may be made slightly larger than the internal shape of the opening surface 3, and the outer peripheral edge may be elastically contracted by the slits 10x and 10y so that the outer peripheral surface is in close contact with the inner periphery of the opening surface 3. .

Note that the internal sealing plate 7 has slits 10x, 10
y, unused insertion hole 8, etc., but if the insertion hole 8 through which the connection branch piece 6 is passed is tightly fitted because it is covered by the external sealing plate 15 described below, the problem will not be solved. None.

Next, an external sealing plate 15 is fitted onto the opening surface 3 so as to overlap the internal sealing plate 7 .

The external sealing plate 15 has insertion holes 16 formed at predetermined positions through which each connection branch piece 6 is inserted. The number of internal sealing plates 7 and the number of external sealing plates 15 are formed.

In order to further ensure a perfect seal at the insertion part of the connecting branch 6, the part shown in FIG. A sealant 17 made of synthetic resin may be interposed.

Furthermore, after the internal sealing plate 7 and the external sealing plate 15 are sequentially fitted into the opening surface 3, a molding agent 18 such as epoxy resin is injected, and the circuit member 4 in the filter 1 is sealed in the case 2. It will be enclosed within.

<Effects of the invention> As described above, in the present invention, the internal sealing plate 7 and the external sealing plate 15 are sequentially fitted into the opening surface 3 of the case 2 of the filter 1, and the insertion holes are formed in the connecting branches 6. 8,
16 is externally fitted to perform double sealing, and the internal sealing plate 7 includes the insertion hole 8 with slits 10x and 10y extending in the X direction and the Y direction so as to surround the insertion hole 8. Since the rectangular peripheral portion 9 is formed into sections and the adjustment hole 11 is formed at the intersection of the center lines of the slits 10x and 10y, the following effects can be obtained.

Due to the double sealing structure, the connecting branches 6 protrude in a tight-fitting manner, and the molding agent 1 injected into the opening surface 3
8 does not flow into the case 2 through the passage of the connecting branch piece 6, and good sealing can be achieved.

The rectangular peripheral portion 9 of the internal sealing plate 7 is allowed to move in the plane direction, and errors in the shape of the internal sealing plate 7, the case opening, etc. can be absorbed, and assembly becomes easy.

The shape of the periphery of the internal sealing plate 7 can be made larger than the shape of the opening surface 3 in advance, thereby improving the adhesion between the periphery of the internal sealing plate 7 and the inner surface of the opening surface 3. Improves stopping power.

By cutting the slits 10x, 10y and making them communicate with the adjustment holes 11, the plane direction mobility of the rectangular peripheral portion 9 can be made arbitrarily large, so that the above-mentioned molding error can be largely addressed.

When the error is small, by not making a cut into the adjustment hole 11, it is possible to avoid the internal sealing plate 7 from becoming fragile, and this selectivity allows the internal sealing to achieve optimal followability according to the situation. Board 7
can be granted to

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional side view of the filter 1, FIG. 2 is an exploded perspective view of the case 2, the inner sealing plate 7, and the outer sealing plate 15, and FIG. 3 is an internal view. A plan view of the sealing plate 7, and FIG. 4 are a partial longitudinal sectional side view. Further, FIG. 5 is a back view of the conventional configuration. 1...Filter, 2...Case, 3...Opening surface, 4...Circuit member, 6...Connection branch piece, 7...
Internal sealing plate, 8...Insertion hole, 9...Rectangular circumference, 1
0x, 10y...Slit, 15...External sealing plate, 16...Insertion hole, 18...Mold material.

Claims (1)

[Scope of Claim for Utility Model Registration] A filter in which various circuit members including a terminal board are installed in a case whose one side is an opening, and the connecting branches of the terminal board protrude from the opening of the case. An insertion hole through which the branch piece is inserted is formed, and a rectangular periphery including the insertion hole is defined by a slit extending in the X and Y directions so as to surround the insertion hole, and further defined in the X and Y directions. An internal sealing plate having an adjustment hole formed at the intersection of the center lines of the slits, and an external sealing plate having an insertion hole through which the connecting branch is inserted are sequentially fitted onto the opening surface of the case. A sealing mechanism for a filter, characterized in that the opening surface is closed by further injecting a molding material.