JPS62271499A - Structure for fitting printed circuit wiring board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mounting structure for a printed circuit wiring board on which electrical components are mounted, particularly a two-tiered printed circuit wiring board. be.

[Conventional technology]

Although this is not a problem when electrical components are mounted on a flat surface on a printed circuit wiring board, a two-tiered structure is often used to increase the shielding effect and to save three-dimensional space.

Figure 2 shows a conventional example of this type of mounting structure.
In the figure, 1 is a sub printed circuit wiring board, 2a is an electrical component mounted on this wiring board 1, 3 is a copper foil pattern, 4 is a main printed circuit wiring board, and 2b is an electrical component mounted on this wiring board 4. , 5 is a holder, 6 is a shield case made of sheet metal, 7 is a protrusion provided on this shield case, 8 is a lead wire or a connector, 9 is a lid of the shield case, and 10 is a hole provided in this lid. be.

Next, the assembly operation will be explained. In the above configuration, the electrical component 2a is mounted in advance on a predetermined copper foil pattern 3 provided on the sub printed circuit wiring board 1. Then, this is inserted and held using a holder 5 so as to face the main printed circuit wiring board 4. Next, the shield case 6 is attached onto the main printed circuit wiring board 4. Generally, soldering is done by inserting the solder into a steel foil pattern provided on the main printed circuit wiring board 4 to form an electrical ground and to have a shielding effect. Next, the lid 9 of the shield case is put on, and at this time, the hole 10 is engaged with the protrusion 7 by fitting. and main printed circuit board 4
The constituent circuits in the sub-printed circuit board 1 and the constituent circuits in the sub-printed circuit board 1 are connected by lead wires or connectors 8, resulting in a two-stage mounting structure as a whole, and the entire structure is shielded.

[Problems to be Solved by the Invention] Since the conventional two-tiered structure is configured as described above, not only the holder 5 is required, but also the sub-printed circuit board 1 is suspended in the air. This makes it vulnerable to vibrations,
Placement restrictions were required. Furthermore, since the shield case 6 must be placed at a distance outside the holder 5, proper placement may be hindered.

This invention is intended to solve the above-mentioned problems, and aims to provide a stable mounting structure for a two-tiered printed circuit wiring board that is space-saving and vibration-resistant without using any holders. There is.

[Means for solving problems]

The mounting structure of a printed circuit wiring board according to the present invention is such that a shield case having four corner portions cut out is mounted on the main printed circuit wiring board, and the four corner portions of the sub printed circuit wiring board are inserted into the notch portions of the shield case. It is fixed in such a way that it rests on it.

[Effect]

In this invention, the shield case and the sub printed circuit wiring board are fitted and fixed at the corners, and the periphery is brought into close contact with each other.
Space-saving and stable.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which 4 is a main printed circuit wiring board, 11 is a shield case with cutouts 11a at the top of each of the four corners, and 12 is a 4P! a sub-printed circuit wiring board installed with each of the I4 corners placed in the notch 11a;
13 is a latch piece by soldering or a protrusion; 14
is the lid of a shield case which also has notches +4a at the four corners. Note that the other components are the same as those of the prior art, so the same reference numerals are given and the explanation thereof will be omitted.

Next, the assembly operation will be explained. In the above configuration, the electrical component 2a is inserted into the sub-printed circuit board 12 in advance, and the four corners are fitted onto the shield case 11 mounted on the main printed circuit board 4 to make contact. place In order to stabilize these holdings, they are held by soldering or by hooking pieces 13 formed from protrusions from the shield case. Before this, the opposing printed circuit wiring boards are connected to each other using lead wires or connectors 8.

In this state, the lid 14 of the shield case is inserted by fitting the protrusion 7 provided on the shield case 11 with the hole 10 provided on the lid 14 of the shield case, and the two-stage structure of installation allows the entire structure to be stably shielded. .

〔Effect of the invention〕

As described above, according to the present invention, it can be mounted stably and firmly without the need for a special holder, so it is resistant to vibration and has a space-saving effect with a shielding effect when placed properly with few restrictions on placement. It should be possible to have a two-stage mounting structure.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of mounting a two-tiered structure of a conventional printed circuit wiring board. In the figure, 2&, 2b are electrical components, 4 (Yo) is a main printed circuit wiring board, 11 is a shield case, lla is a notch, and 121 is a sub printed circuit wiring board. A considerable portion is shown.

Claims (1)

[Claims] In the case where a sub-printed circuit board with electrical components mounted is mounted opposite to a main printed circuit board with electrical components mounted, a shield case with a notch in the corner is mounted on the main printed circuit board, and this A mounting structure for a printed wiring board, characterized in that a corner of the sub printed circuit wiring board is fitted into a notch of a shield case and fixed thereon.