JPH08167785A - Shield case - Google Patents

Abstract

PURPOSE: To eliminate use of an expensive metal dies by forming a bending segment adjacent to a slit groove of a shield case and bending the bending segment by inserting a hooking piece of a partition plate into the slit groove to lead the hooking piece to the side plate of the shield case. CONSTITUTION: In a shield case 1, a side plate allows formation of a slit groove 4 to which a hooking piece provided at a partition plate 2 is inserted and a bending piece 5 is also provided adjacent to the slit groove 4. A printed circuit board 6 is supported by a printed circuit board clamping means 7 erected from a cutout part provided at the side plate of the shield case 1. A projected means 8 provided at the lower end of the partition plate 2 is inserted to a through hole provided on the printed circuit board 6. The hooking piece 3 of the partition plate 2 is inserted to the slit groove 4 and the bending piece 5 adjacent to the slit groove 4 is bent to fix the hooking piece of the partition plate 2 to the side plate of the shield case 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case for shielding a plurality of circuits of a high frequency circuit unit such as an electronic tuner.

[0002]

2. Description of the Related Art As a shield case for fixing a printed circuit board, for example, one disclosed in Japanese Patent Laid-Open No. 60-52098 is known. That is, as shown in FIG. 7, one flat plate was pressed with a die, and the portion with the diagonal lines in FIG. 7 was punched out. Then, as shown in FIG. 6, each part was bent to form a shield case. In FIG. 6, 11 is a shield, which is the housing of the electronic tuner.
Partition plates 12, 13, 1 for partitioning into several sections in the case
4, 15, 16, 17, and 18 are provided, and the four-sided frames are integrated by the joint portions 11a, 11b, 11c, and 11d at the four corners. Further, the partition plates 12, 13, 14, 15 and 1
6, 17 and 18 are joint parts 12a and 13 from the same front side.
It is constructed integrally with the shield case via a, 14a, 15a and 16a, 17a, 18a. Then, a mold is used when the shield case 11 is assembled by cutting the bent portions of the joint portions 11a, 11b, 11c, 11d and the portions 13a, 14a, 15a, 16a.

[0003]

The problem of the above-mentioned conventional example is that a die punched from a single metal plate by a press as shown in FIG. 7 has a complicated structure and its manufacturing cost is high. Further, as shown in FIG. 6, the die used for bending and assembling the joint portion was also expensive to manufacture.

Further, since it is not possible to raise only a specific partition plate among a plurality of partition plates, the height of the components mounted on the printed circuit board to be mounted on the shield case is also restricted.

An object of the present invention is to solve the above-mentioned problems of the conventional example, and without using an expensive mold, the height of a specific partition plate of a plurality of partition plates can be changed to another level. If it is desired to make it higher than the partition plate, the height can be easily changed.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a partition plate for shielding a plurality of circuit portions on a printed circuit board at a tip portion of a side plate of a shield case. A slit groove into which the hook piece can be inserted and a bendable piece that can be bent are formed adjacent to the slit groove,
The hook piece of the partition plate is inserted into the slit groove of the shield case, the bent portion piece is bent, and the hook piece is attached to the side plate of the shield case.

Further, in addition to the invention according to claim 1, the invention according to claim 2 forms a printed circuit board restraining part by providing a notch in a side plate of the shield case, and the printed circuit board restraining part. Is bent inward of the side plate to support the back surface of the printed board, and the protrusion formed at the lower end of the partition board is inserted into the through hole provided in the printed board.

[0008]

According to the present invention, since the slit groove is provided on the side plate of the shield case and the bent piece and the hook piece are formed on the partition plate adjacent to the slit groove, the complicated and expensive mold is not required. It is unnecessary.

Further, the height of the partition plate can be arbitrarily adjusted by the printed circuit board restraining portion provided on the side plate of the shield case and the protruding portion of the partition plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In the figure, reference numeral 1 denotes a shield case, a side wall of which is provided with a slit groove 4 into which a hook piece 3 provided on a partition plate 2 is inserted, and a bent piece 5 is provided adjacent to the slit groove 4. . 6 is a printed circuit board,
As shown in FIG. 2, it is supported by a printed circuit board restraining portion 7 cut and raised from a notch provided in a side plate of the shield case 1. Reference numeral 8 denotes a projecting portion provided at the lower end of the partition plate 2, which is fitted in a through hole provided in the printed circuit board 6 as shown in FIG. The partition plate 2 shown in FIG. 3 (a) and FIG.
3 is inserted into the slit groove 4 shown in FIG. 3 (b), and the bent piece 5 adjacent to the groove 4 is bent as shown in FIG. Secure to the side plate of shield case 1.

The lower part of the printed circuit board 6 on which the electronic components are mounted passes through the solder bath, and the electronic components are soldered by the solder in the solder bath, and the through holes of the printed circuit board 6 and the partition plate 2 project. The part 8 can be automatically soldered and fixed by soldering.

In the shield case 1 of this embodiment, the slit groove 4 into which the hook piece 3 of the partition plate 2 is inserted and the bent piece 5 are simply provided, and there is no need for press molding with a complicated mold. The printed circuit board 6 has a simple structure in which the protruding portion 8 of the partition plate 2 is inserted into the through hole of the printed circuit board 7 while being supported by the printed circuit board restraining portion 7 formed by the notch provided in the side plate of the shield case 1. Therefore, the height of the partition plate 2 can be determined by the position of the printed circuit board restraining portion 7 provided on the side plate. By appropriately dividing the printed circuit board 7, the heights of the plurality of partition plates 2 are mutually changed. Therefore, the height of the electronic components mounted on the printed circuit board 6 is not restricted.

[0013]

As described above, according to the present invention, it is possible to form a simple slit groove and notch without using a complicated press die and assembly die for forming the shield case. large.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a shield case according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the main part.

3A is a perspective view of the partition plate, FIG. 3B is a perspective view of a side plate of the shield case, and FIG. 3C is a perspective view of a main part when the partition plate is attached to the side plate.

FIG. 4 is a perspective view of a slit groove portion of a side plate of the shield case.

FIG. 5 is a perspective view of a slit groove portion in a state in which the bent portion piece is bent.

FIG. 6 is a perspective view of a shield case in a conventional example.

FIG. 7 is a front view showing a state where one plate is punched by a press die before assembling the shield case.

[Explanation of symbols]

 1 Shield Case 2 Partition Plate 3 Hook Piece 4 Slit Groove 5 Bent Part Piece 6 Printed Circuit Board 7 Printed Circuit Board Retaining Section 8 Projection

Claims (2)

[Claims] 1. A slit groove into which a hook piece of a partition plate for shielding a plurality of circuit portions on a printed circuit board can be inserted into a tip portion of a side plate of a shield case, and the slit groove can be bent adjacent to the slit groove. A shield case in which a bent piece is formed, a hook piece of a partition plate is inserted into the slit groove of the shield case, the bent piece is bent, and the hook piece is attached to a side plate of the shield case. 2. A lower side of a partition plate, wherein a side plate of the shield case is provided with a cutout portion to form a printed circuit board restraining portion, and the printed circuit board restraining portion is bent inside the side plate to support the back surface of the printed circuit board. 2. The shield case according to claim 1, wherein the protruding portion formed in the above is inserted into a through hole provided in the printed circuit board.