JPH07122875A - Shield case - Google Patents

Abstract

PURPOSE:To provide a shield case in which a printed-circuit board can be attached simply and surely to a frame part. CONSTITUTION:A printed-circuit board 2 in which grounding patterns provided with solder through holes 7 at the periphery is inserted into cut and erected grooves 4 formed on a shield case 1, V-grooves at bent parts are bent, and the printed-circuit board is fixed. The bent parts which fix the printed-circuit board 2 to the shield case 1 are dip solder together with other components mounted on the printed-circuit board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded case structure for a printed circuit board of a high frequency circuit unit such as an electronic tuner.

[0002]

2. Description of the Related Art As a structure of a shield case for fixing a printed circuit board, a structure described in Japanese Patent Laid-Open No. 4-188793 is generally known. As a conventional example,
As shown in FIG.

FIG. 3 shows a shield case 31 having a substrate fixed thereto.
3 is a side sectional view of FIG. 3, in which 34 is a grounding claw, 33 is a substrate receiver, and 32 is a substrate. The substrate 32 is inserted into the shield case 31, the substrate 32 is supported by the substrate receiver 13, the ground claw 34 is folded inside the shield case, and the substrate 32 is fixed by the substrate receiver 33 and the ground claw 34. is there.

Further, in Japanese Patent Laid-Open No. 2-97095,
An invention has been disclosed in which a guide hole is provided in a substrate and a guide is inserted into a protrusion and fixed. This will be described with reference to FIG.

In FIG. 4, 42 is a substrate, 43 is a protrusion of the shield case 41, 46 is a guide formed in the protrusion 43, 47 is a guide hole provided in the substrate 42, 44
Is a tapered claw.

The substrate 42 is inserted into the shield case 41, and the guide 46 provided on the protrusion 43 is inserted into the guide hole 47 of the substrate 42 to support it. And tapered pawl 44
Is folded on the substrate 42, and the substrate 42 is fixed and supported together with the protrusions 43.

[0007]

In the one described above with reference to FIG. 3, the tip of the substrate 32 support portion of the frame portion of the shield case 31 is in line contact with the lower portion of the substrate 32, and the solder dip bath is used. There were many problems such as when the solder did not adhere enough when the substrate was poured into the substrate, or when the substrate 32 was inserted from the lower portion of the frame portion, the supporting portion of the substrate 32 was hard and sometimes the insertion was difficult. .

3 and 4, the shield cases 31 and 41 are provided with the substrate receiver 13 or the protrusions 4 in the shield cases 31 and 41.
1 and the grounding claw 44 or the tapered claw 44 must be fixed at two parts, which causes a trouble in manufacturing.

[0009]

In view of the above problems, the present invention provides a printed circuit board provided with an earth pattern having a plurality of solder through-holes on the periphery thereof, and a frame which can be inserted into the solder through-holes. A shield case is provided in which a plurality of cut-and-raised guides are provided in a portion, the tip of the cut-and-raised guide is bent after the insertion to fix the printed circuit board, and further, the shield pattern is soldered to the ground pattern.

[0010]

According to the present invention, the shield case of the printed circuit board is used.
The method for attaching the space to the frame is easy and reliable, and the solder connection between the ground pattern of the printed circuit board and the frame of the shield case can be easily performed simply by pouring it into the solder dip tank together with other printed components.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be explained.

FIG. 1 is an embodiment of the present invention, and is a cross-sectional view showing a state in which a printed circuit board 2 is inserted in a shield case 1. FIG. 2 (a) is a printed circuit board fixed in the state shown in FIG. 2 is a detailed view (side cross-sectional view) of the portion shown in FIG.
(B) is a detailed view of the cut-and-raised guide 4.

Hereinafter, the shield case 1 of the printed circuit board 2
The procedure for attaching to the frame will be described.

The printed circuit board 2 is inserted into the shield case 1, and a plurality of cut-and-raised guides 4 provided on the frame portion of the shield case 1 are inserted into the solder through holes 7 of the printed circuit board 2 to print. The substrate 2 is supported by the shield case 1. Next, the bent portion 6 of the cut-and-raised guide 4 is bent on the back surface of the printed board 2 and brought into contact with the printed board 2, and the printed board 2 is fixed as shown in FIG. The bent portion 6 may be provided with an object such as the V groove 5 so that it can be easily bent.

In this state, the cut-and-raised guide 4 is automatically soldered together with other print-mounted components when flowing into the solder dip bath.

To insert the cut-and-raised guide 4 of the shield case 1 into the solder through hole 7 of the printed circuit board 2 as in the present embodiment, and further bend the bent portion 6 to fix the printed circuit board 2 for soldering. Therefore, the printed circuit board 2 can be connected with high accuracy without displacement.

[0017]

As described above, according to the present invention, since the printed circuit board can be fixed only from the cut-and-raised portion from the shield case, the ground pattern of the printed circuit board and the shield case can be connected easily and securely. Further, since the assembling work is simple, the time required for assembling is greatly reduced.

Further, since only one type of cut-and-raised guide having a simple shape is required for the printed circuit board, the shield case is very easily manufactured by a die.

[Brief description of drawings]

FIG. 1 is a cross-sectional perspective view showing a state in which a printed circuit board is attached to a shield case that is an embodiment of the present invention.

2A and 2B are cross-sectional views showing a cut-and-raised guide portion of the shield case, and FIG. 2C is a cross-sectional view showing a cut-and-raised portion of the shield case.

FIG. 3 is a sectional view showing an example of a state in which a printed circuit board of a conventional shield case is fixed.

4A, 4B, and 4C are perspective views showing another example of a state where a printed circuit board of a shield case of a conventional example is fixed.

[Explanation of symbols]

 1 Shield Case 2 Printed Circuit Board 4 Cut and Raised Guide 5 V Groove 6 Bent Section 7 Solder Through Hole Hole

Claims (1)

[Claims] 1. A printed circuit board having a ground pattern having a plurality of solder through-holes on the periphery thereof, and a plurality of cut-and-raised guides provided on a frame portion so that the frame can be inserted into the solder through-holes. A shield case in which the tip of the raising guide is bent to fix the printed circuit board, and is further soldered to the ground pattern.