JP2710513B2 - How to fix the board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a substrate made of a brittle material to a housing part.

[0002]

2. Description of the Related Art Conventionally, this type of board fixing method is to fix a board to an upper part of a housing with an adhesive, and fix a terminal block through which lead terminals are to be penetrated to a lower part of the housing with an adhesive, and then mount the board. The lead terminal is passed through the terminal block to connect the upper part of the housing and the lower part of the housing.

This will be described with reference to FIG. FIG. 3 is a cross-sectional view showing an example of a main part of a housing component to which a conventional board is fixed.

As shown in the figure, the substrate 10 is fixed to the upper part 50 of the housing via a buffer 51 with a double-sided adhesive tape 52, while the terminal block 60 is attached to the lower part 70 of the housing with an adhesive 7
Fixed at 1.

After the two are fixed by the adhesive, the substrate 1
0 lead terminal 11 is a terminal block 60 and a housing stock component 70
Penetrate through each terminal through-hole and then the housing upper part 50
And the housing lower part 70 are combined.

[0006] Adhesive fixing requires the skill of carefully connecting components after confirming the mounting position of the components and the like, and also requires time.

[0007]

In this conventional method of fixing a substrate, since the substrate and the terminal block are each fixed to a housing part with an adhesive, accurate positioning is difficult, and the next step is until the adhesive is cured. It is necessary to wait for the assembly process, and time loss cannot be avoided.

Further, when replacing the substrate, a substrate made of a brittle material such as ceramic is fixed with a double-sided adhesive tape,
In addition, there is a problem that a partial buffer may not be able to absorb an external impact and the substrate may be easily damaged even after assembly.

An object of the present invention is to use a pedestal made of a molded resin material at a position corresponding to a terminal block as a buffer, and to protect a screw hole of a substrate with a washer integrally formed with the pedestal, thereby achieving the above-mentioned object. An object of the present invention is to provide a method of fixing a substrate, which solves the problem.

[0010]

According to the present invention, there is provided a method of fixing a substrate, comprising: fixing a substrate made of a brittle material to a housing component by using an insulator having a shape avoiding a circuit mounting surface of the substrate. A pedestal of a molded resin material is superimposed on the housing component, and a plurality of positioning tapers of the pedestal are fitted and matched with the protrusions of the housing component, and the substrate is read from above the pedestal to the lead of the substrate. The terminals are passed through the terminal through holes of the pedestal and the housing component, respectively, and overlapped. Then, the screw through holes of the protrusions and the substrate, and the screw holes following the positioning taper are passed through from below with bolts. After passing the bolt through a washer integrally formed with the pedestal, a nut is hung from the tip of the bolt, and the base is passed through the washer. Is to fastened the seat and the housing part.

[0011]

Next, the present invention will be described with reference to the drawings. FIG. 1 is an assembled perspective view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an example of a main part after assembly in FIG.

As shown, a ceramic substrate 10 made of a brittle material includes a predetermined number of lead terminals 11 and a substrate 10.
Screw through holes 12 passing through bolts 42 for fixing
Having.

A pedestal 20 made of a molding resin is provided with terminal through holes 21 at predetermined intervals where the lead terminals 11 are spaced from each other, and a washer projection 22 having a diameter to be fitted into the screw through holes 12 of the substrate 10.
Nut 41 integrally formed with base 20 to hold bolt 42
And a screw hole 24 passing through the bolt 42, and a positioning taper 25 provided at the entrance of the screw hole 24 for positioning.

The lower housing part 30 has a terminal through hole 31 for drawing out the lead terminal 11 penetrating the terminal through hole 21 of the pedestal 20 to the outside below, and a positioning taper 25 of the pedestal 20.
And a screw through hole 33 for a bolt 42 that passes through the screw hole 24 and the screw through hole 12 from the protrusion 32.

Next, an assembling procedure will be described with reference to the drawings.

First, the pedestal 20 is placed on the housing component 30 so as to be positioned thereon, and the positioning taper 25 is fitted to the projection 32 to be positioned. On this pedestal 20, the lead terminals 11
Is mounted on the board 10 while penetrating through the terminal through holes 21 and 31, so that the lead terminal 11 or the housing component 30 is exposed from below.

Next, the washer projection 22 of the washer 23
Is screwed from above into the position of the screw through hole 12 of the substrate 10, and the screw hole 24 and the washer 23 are screwed into the screw through hole 1.
2, a nut 41 is disposed above the washer 23, and a bolt 42 that has passed through the screw through-hole 33, the screw hole 24, and the screw through-hole 12 from below the housing part 30,
It reaches the nut 41 from the washer 23, and is tightened and fixed by the nut 41.

Accordingly, the substrate 10 is fixedly connected to the housing component 30 via the pedestal 20 by the bolts 42 and the nuts 41.

The above description is an example of the procedure which seems to be the most normal. The same effect can be obtained even if the procedure is performed before or after, or the direction is reversed. It does not do.

[0020]

As described above, according to the present invention, a substrate made of a brittle material is screwed to a housing part with bolts and nuts via a pedestal also serving as a buffer, and a screw through hole of the substrate has a pedestal. And the screw through hole of this board is protected by the pedestal and the washer by this pedestal, while the same pedestal also serves as the pedestal of the lead terminal, and is easy to use. By holding the ceramic substrate with simple screwing, the number of parts can be reduced, and the rotation of the nut by the washer on the pedestal can be effectively stopped.Assembling time can be reduced, and the product is not affected by assembly skills. There is an effect that the maintenance of characteristics can be achieved.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing one embodiment of the present invention.

FIG. 2 is a sectional view showing an example of a main part after assembly in FIG. 1;

FIG. 3 is a cross-sectional view showing an example of a main part after a conventional component member is assembled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Substrate 11 Lead terminal 12, 33 Screw through hole 20 Pedestal 21, 31 Terminal through hole 22 Washer convex part 23 Washer 24 Screw hole 25 Positioning taper 30 Housing part 32 Projecting part 41 Nut 42 Bolt

Claims (1)

(57) [Claims] 1. A method of fixing a board made of a brittle material to a casing part, wherein a pedestal of a molding resin material made of an insulator having a shape avoiding a circuit mounting surface of the board is superimposed on the casing part. The plurality of positioning tapers of the pedestal are fitted and matched with the projections of the housing component, and the board is inserted from above the pedestal, and the lead terminals of the board are connected to terminal through holes of the pedestal and the housing component, respectively. Then, a screw through hole of each of the protrusion and the substrate, and a screw hole following the positioning taper are penetrated from below with a bolt, and further, the washer is integrally formed with the pedestal. After penetrating the bolt, a nut is hung from the tip of the bolt, and the board, the pedestal, and the housing part are tightened and fixed via the washer. Fixing method of the substrate, wherein Rukoto.