JPH0128720Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in shield plates for electrical equipment and the like.

Conventionally, shield plates for electrical equipment such as audio tuners, etc., have an outer wall portion 1 punched from a plate material and another internal partition wall manufactured by punching the plate material, as shown in FIG. 1, for example. Consists of parts 2 and 3.

On the edges of the outer wall 1 and internal partitions 2 and 3 that contact the printed circuit board, projections 1a, 2a, and 3 are inserted into insertion holes drilled in the printed circuit board, respectively.
In order to engage the outer wall 1 with the inner partitions 2 and 3, a groove 1b is formed in the outer wall 1, and protrusions 2b and 3b are formed in the inner partitions 2 and 3, respectively.

Then, the protrusions 1a, 2a, 3a of the outer wall 1 and the internal partitions 2, 3 are respectively inserted into the insertion holes of the printed wiring board, and the grooves 1b are engaged with the protrusions 2b, 3b.

After that, the protrusion 1 is bonded with a solder dip or the like.
After fixing a, 1b, and 1c to the conductive part of the wiring board, the outer wall part 1 and the engaging part A of the internal partition part were soldered and fixed. Such a conventional structure is A
Secondary soldering of the parts is required, and this soldering requires skill, and there is a drawback that the shielding effect is reduced when the soldering process occurs.

The present invention improves on these conventional drawbacks, and will be explained below with reference to the drawings.

FIG. 3 In the following drawings, FIG. 3 shows a punched plate material, which includes the portions 4a, 4b and 4 which constitute the outer wall portion 1 and the inner partition portions 2 and 3.
c is the integrated shield plate material 4. Also 4d
is the folded and superimposed part. Note that the dotted line portion indicates the bent portion, and the solid line portion indicates the cut portion.

As shown in FIG. 4, the shield plate material 4 is bent at right angles at the boundaries between portions 4a and 4b, and at right angles at the boundaries between portions 4c and 4d in a direction opposite to the above direction, thereby forming an overlapping portion 4d. Fold it back 180 degrees and bring it close to part 4b.

By doing this, a shield plate is constructed which is composed of an outer wall portion made up of portions 4a and 4b and an inner partition portion made up of portion 4c.

Note that the edge of each portion that is to come into contact with the printed wiring board is provided with a protrusion that is to be inserted into the printed wiring board.

FIG. 5 shows an embodiment in which there is only one internal partition plate, and an overlapping part 5d that is connected to a part of the outer wall part 5 and an internal partition part that is bent at a right angle from the overlapping part 5d. A shield plate can be formed by folding the overlapping portion 5d by 180 degrees and bringing it into contact with the outer wall portion 5.

As described above, the present invention has the practical advantage of integrating the outer wall part 1 and the inner partition parts 2 and 3, which were conventionally separate parts, by a series of punching processes, and also allows the secondary soldering of part A. Since no machining is required, there is an advantage that costs can be reduced.

[Brief explanation of drawings]

1 and 2 are perspective views showing a conventional shield plate structure, and FIGS. 3, 4, and 5 are a plan view and a perspective view showing the structure of a shield plate according to the present invention. 1 is an outer wall part, 2 and 3 are internal partition parts, A is a secondary soldering part, 4a and 4b are parts forming the outer wall part, 4c is a part forming an internal partition part, 4d
is the superimposed part.

Claims (1)

[Scope of utility model registration request] Portions 4a and 4b forming the outer wall of the shield plate
, an overlapping part 4d connected to either of the parts 4a and 4b, and a part 4c constituting an internal partition part connected to the overlapping part 4d,
The boundary portion between a and 4b, the overlapping portion 4d and the portion 4c are bent at right angles, and the overlapping portion 4d is further folded back and brought into contact with either of the portions 4a and 4b constituting the outer wall portion, and the internal finished portion is A shield plate characterized in that a shield plate is arranged within an outer wall.