JPH0690093A - Shielding parts of high-frequency equipment - Google Patents

Abstract

PURPOSE:To provide the shielding parts of a high-frequency equipment which can automate an assembly process, positively connect the ground pattern of a substrate and the shield plate, is flexible for shape change, and can reduce cost. CONSTITUTION:Two sets of holding parts 13 and 17 holding both side surfaces of a screen 41 of a shield case from a plane bottom surface are erected and a shield tab 10 with an adsorption part 21 in a shape adsorbed to the suction part of an automatic machine is formed in one piece by one metal plate between the two sets of the holding parts 13 and 17. The bottom surface of the shield tab 10 is soldered to the specific position of the ground pattern of a substrate and at the same time the screen 41 is held by the holding parts 13 and 17 when the substrate is covered with the shield case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield component for high frequency equipment.

[0002]

2. Description of the Related Art In a high frequency radio device, a shield case plated with metal has been conventionally installed on a substrate in order to obtain desired electrical performance. FIG. 4 is a schematic exploded perspective view showing an example in which a contact plate is attached between the substrate and the shield case in order to obtain the shielding effect more stably and surely.

In the figure, reference numeral 81 is a shield case, and the shield case 81 is formed by metal plating the entire surface of a resin plate. This shield case 81
Is provided with a partition portion 83 having a shape along the ground pattern 99 of the substrate 95 described below.

Reference numeral 87 is a contact plate made of a spring material, and is constituted by providing a claw 89 and a locking piece 91 on the upper side of the plate having a shape along the partition portion 83. The claw 89 is formed by bending the upper end side of the plate at a right angle and by bending both ends thereof upward, and the locking piece 91 is formed by bending the plate downward in a substantially U-shape.

On the other hand, reference numeral 95 is a substrate, and various circuit blocks 97 such as a transmission block and a reception block are constructed by attaching various kinds of electronic parts (not shown) on the lower surface thereof. A ground pattern 99 is provided between the various circuit blocks 97.

The partition portion 83 of the shield case 81
The engagement piece 91 of the contact plate 87 is engaged and fixed to the contact plate 87, and the substrate 95 is covered and fixed thereon. As a result, the claw 89 of the contact plate 87 is pressed against the ground pattern 99 of the substrate 95,
There is a reliable connection between the two. As a result, each circuit block 97 is shielded and electromagnetic interference is prevented.

[0007]

However, the contact plate 91 has the following problems. The attachment to the shield case 81 is manual insertion. In other words, it cannot be installed automatically, which requires man-hours.

When the contact plate 87 is attached to the partition portion 83 of the shield case 81, it suffices if it is properly attached as shown in FIG. 5 (a), but the plate is bent as shown in FIG. 5 (b). Is likely to occur, and in this case, the position of the claw 89 varies.

The locking piece 91 of the contact plate 87 may come off the shield case 81.

The contact of the substrate 95 with the ground pattern 99 is only point contact with the claw 89.

There is no flexibility in changing the shape.

[0012] The unit cost of the mold becomes expensive.

The present invention has been made in view of the above points, and an object thereof is to automate the assembling process, to ensure the connection between the ground pattern of the board and the shield case,
An object of the present invention is to provide a shield component for high-frequency equipment that is flexible with respect to shape changes and can also reduce costs.

[0014]

In order to solve the above problems, the present invention, as shown in FIGS. 1 and 2, provides various circuit blocks 31 and an earth pattern 33 for separating the various circuit blocks 31. Substrate 30 and the substrate 30
A shield case 40 is provided, which is covered with a partition plate 41 at a position facing the earth pattern 33, and the shield case 40 is covered on the substrate 30 to electrically connect the shield case 40 and the earth pattern 33. In a shield component for a high-frequency device, a holding part 13 (1) for holding both side surfaces of the partition plate 41 from a flat bottom surface 11
7) and a suction tab 21 having a shape to be sucked by a suction portion of an automatic machine are integrally formed from a single metal plate, and the bottom surface 1 of the shield tab 10 is integrally formed.
1 is fixed to the ground pattern 33 at a predetermined position, and when the shield case 40 is put on the substrate 30, the holding plate 13 (17) holds the partition plate 41.

[0015]

Since the shield tab 10 is provided with the suction portion 21 integrally therewith, the shield tab 10 can be moved by an automatic machine, and the mounting of the shield tab 10 on the substrate 30 can be automated. Further, it is possible to flexibly deal with the shield case 40 and the substrate 30 having different shapes. That is, the shape of the shield tab 10 does not need to be changed at all, and only the attachment position thereof needs to be changed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing the shape of a shield tab used in the present invention. As shown in the figure, the shield tab 10 is manufactured by processing a single metal plate (phosphor bronze for spring subjected to gold plating treatment), and its structure has a planar bottom surface 11 to 2 Pair of sandwiching parts 1
3 and 17 are erected, and the two sandwiching portions 13 and 1
The suction part 21 is provided between the two.

Here, the sandwiching portions 13 and 17 are bent at both sides of the bottom surface 11 so as to be erected at a substantially right angle in an upward direction, and the vicinity of the upper end thereof is bent inwardly in a V shape so as to be pressed.
9 is provided.

On the other hand, the adsorbing portion 21 is formed by vertically bending both side edges of the bottom surface 11 in an upward direction at a substantially right angle, and the upper ends thereof are inwardly bent at right angles, and the planar adsorbing surface 2 is formed at the upper end portion.
3 is formed. The size of the suction surface 23 is formed so that it can be sucked by a suction portion of an automatic machine (not shown).

The bottom surface 11 of the shield tab 10 is fixed to the ground pattern 33 of the substrate 30 described below by soldering, and the partition plate 41 of the shield case 40 is sandwiched between the sandwiching portions 13 and 17. Shield tab 10 of partition plate 41
As shown in FIG. 1, a notch 43 having a width wider than that of the suction portion 21 is provided in a portion to which is attached.

FIG. 2 is a schematic perspective view showing a substrate 30 and a shield case 40 which are connected using the shield tab 10.

As shown in the figure, various circuit blocks 31 such as a transmission block and a reception block are provided on the substrate 30, and the various circuit blocks 31 are separated by a ground pattern 33.

On the other hand, the shield case 40 is formed by metal-plating the entire surface of a resin plate. Partition plates 41 are provided on the upper and lower surfaces of the shield case 40, respectively. Although the partition plate on the lower surface side is not shown, its shape is provided at a position facing the earth pattern 33 of the substrate 30 when the shield case 40 is covered with the substrate 30. The partition plate 41 is also provided on the upper surface side of the shield case 40 for the purpose of attaching another substrate by turning it over.

Next, a method of manufacturing the shield component according to the present invention will be described. Here, FIG. 3 shows one shield tab 10
It is a figure which shows the state which takes out the shield tab 10 from what wound around the reel 51 the carrier tape 53 accommodated individually.

As shown in the figure, first, the carrier tape 53 is pulled out from the reel 51, the top tape 55 is peeled off, and the shield tab 10 is taken out from each storage portion 57.
This take-out work is performed by the suction portion 21 (see FIG. 1) of the shield tab 10 which is stored in each storage portion 57 one by one.
This is performed by adsorbing the suction part of an automatic machine (not shown).

Next, the shield tab 10 is attached to a predetermined position on the ground pattern 33 of the substrate 30 shown in FIG. 2 by the automatic machine. Then, the substrate 30 is reflowed so that the bottom surface 11 (see FIG. 1) of the shield tab 10 is connected to the ground pattern 33.
Solder to.

A shield case 40 is provided on the substrate 30.
Cover. At this time, the partition plate 41 of the shield case 40
Is sandwiched by the sandwiching portions 13 and 15 (see FIG. 1) of the shield tab 10, and both are securely connected electrically and mechanically.

In the above embodiment, the sandwiching parts 13 and 17 of the shield tab 10 are two sets and the suction part 21 is one set, but the present invention is not limited to this, and both the sandwiching part and the suction part are provided. It may be one set or two or more sets.

[0028]

As described in detail above, the shield component for a high frequency device according to the present invention has the following excellent effects. Since the shield tab is provided with the suction portion, the shield tab can be moved by an automatic machine, and the attachment of the shield tab to the substrate can be automated. Further, not only can the man-hours be reduced by the automation, but also the shield tab can be stably and reliably positioned on the substrate, and the attachment position of the shield tab is less likely to vary.

Since the shield tab itself is provided with the suction portion, the cost of parts is reduced.

It is possible to flexibly deal with shield cases and substrates having different shapes. That is, it is not necessary to change the shape of the shield tab, and it is only necessary to change the attachment position.

Since two sets of sandwiching portions are provided, the contact point of the shield tab to the shield case is the shield tab 1.
There are 4 points for each piece, and the electrical and mechanical connection between them is secured.

[Brief description of drawings]

FIG. 1 is a perspective view showing the shape of a shield tab used in the present invention.

FIG. 2 is a schematic perspective view showing a substrate 30 and a shield case 40 which are connected using the shield tab 10.

FIG. 3 is a diagram showing a state in which a shield tab 10 is taken out from a carrier tape 53 wound around a reel 51.

FIG. 4 shows a contact plate 8 between a substrate 95 and a shield case 81.
7 is a schematic exploded perspective view showing a conventional example to which 7 is attached.

FIG. 5 shows the contact plate 87 as a partition 8 of the shield case 81.
It is a principal part top view which shows the state attached to FIG.

[Explanation of symbols]

 10 Shield Tab 11 Bottom 13 and 17 Clamping Part 21 Adsorption Part 30 Board 31 Various Circuit Blocks 33 Ground Pattern 40 Shield Case 41 Partition Plate

Claims (2)

[Claims] 1. A substrate provided with various circuit blocks and provided with an earth pattern for partitioning the various circuit blocks, and a shield case provided with a partition plate on the substrate so as to face the earth pattern. In a shield component of a high-frequency device in which a shield case is covered on a substrate and the shield case and an earth pattern are electrically connected to each other, a sandwiching portion sandwiching both side surfaces of the partition plate from a flat bottom surface is provided upright. A shield tab having a suction portion of a shape that is attracted to the suction portion of an automatic machine is integrally formed of a single metal plate, and the bottom surface of the shield tab is fixed to a predetermined position of the earth pattern, and a board is provided. A shield component for a high-frequency device, characterized in that when a shield case is put on the top, the partition plate is sandwiched by the sandwiching part. 2. The shield component for a high-frequency device according to claim 1, wherein two sets of sandwiching parts of the shield tab are provided, and the suction part is provided between the two sets of sandwiching parts.