JP3102735B2 - PCB mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a printed circuit board on a shield case, and more particularly to a printed circuit board mounting structure most suitable for mounting a shield case for each printed circuit board on a collective board in advance. This is a mounting structure that can be applied to a case where a single substrate is mounted on a shield case.

[0002]

2. Description of the Related Art As a mode of obtaining a printed circuit board of an electronic device or the like, there is a mode of obtaining a plurality of printed circuit boards by mounting components on a collective board formed by arranging a plurality of circuits on one board and then dividing the board. In some cases, each of the divided printed boards is attached to a shield case. In such a case, conventionally, as shown in FIG. 5 , the shield case 11 has a shape surrounding the periphery of the printed circuit board 12, and the protrusion 13 is provided on the inner surface side of the shield case 11 by protrusion. The mounting height of the printed circuit board 12 is determined, and a projection 14 is provided separately from the projection 13 by a protruding process, and the printed circuit board 12 is temporarily fixed by being strongly fitted to the outer shape of the printed circuit board 12.

[0003]

However, in the prior art, the shield case 11 has a shape surrounding the periphery of the printed board 12, that is, the printed board 12 is completely housed in the shield case 11. Therefore, it is impossible to attach the shield case 11 for each divided board before splitting the collective board, resulting in poor work efficiency,
It has been difficult to automate the soldering work between the printed circuit board 12 and the shield case 11.

Further, a projection 1 is provided inside the shield case 11.
3, the mounting height of the printed circuit board 12 is determined, so that there is a disadvantage that the component mounting area of the board is reduced. Further, the projections 13 for positioning and the projections 14 for temporarily fixing the board are protruded. Since it is formed, it is not only uneconomical to require a die cost and processing cost for the protruding process, but also it is easy for the protruding process of the shield case 11 to vary, and the positioning and fixing force are fixed. Was difficult to do.

Accordingly, an object of the present invention is to eliminate the above-mentioned disadvantages of the prior art and to easily and temporarily fix the shield case before dividing the collective board, and also to attach a single board to the shield case. An object of the present invention is to provide a printed circuit board mounting structure that can be applied.

[0006]

In order to achieve the above object, a printed circuit board mounting structure according to the present invention includes a printed circuit board mounting structure for mounting a printed circuit board on a shield case. A plurality of slits and a dividing line for dividing the plurality of printed circuit boards are formed, and the shield case is attached to the collective substrate, and then divided at the dividing line. In addition to forming a rounded portion at the base of the tongue-shaped support portion of the printed circuit board, the rounded portion of the support portion comes into contact with the side wall of the notch, and the printed portion is formed.
When storing the board in the shield case, the roundness (2b) is cut off.
The support portion of the printed circuit board is fitted into the cutout portion of the shield case by pushing open the notch portion (1a), and the mounting height of the printed circuit board to the shield case is determined and at least temporarily fixed. Things.

The above-mentioned shield case is mounted on the collective board, but the same conditions are adopted when a single board is mounted on the shield case, and a tongue-shaped support portion is formed on the printed board. In the shield case, a "U" shaped notch is formed, and the roundness of the support
The side wall of the cutout is in contact with the printed circuit board.
When storing in the cold case, the roundness (2b) is
When the printed circuit board is mounted on the shield case, the mounting height can be determined and the temporary fixing can be performed by fitting the printed circuit board into the shield case by pushing and opening a) .

In the above two embodiments, the notch and the support are
When installed in a symmetrical position, the printed circuit board
It becomes possible to attach it stably.

[0009]

A plurality of identical circuits are formed side by side on a collective board, and a plurality of printed boards can be obtained by dividing after mounting components. The printed circuit board to be divided has slits formed around it, and is held by about two supporting portions. Dividing lines formed of V grooves, perforations, dashed slits, and the like are formed in the supporting portion, and in the related art, the dividing lines are formed so that the supporting portion does not remain on the divided printed circuit board. But
In the present invention, a dividing line is provided at a position where the supporting portion remains like a tongue piece.

In order to attach the shield case to such a collective board, the periphery of the shield case is pushed in so as to fit into the slit. Since the opening edge of the base of the support portion and the cutout portion of the shield case is rounded, the support portion is guided by the roundness of the opening edge and fits into the cutout portion. At this time, since the base of the support portion is rounded, the rounded portion is closely fitted to the side edge of the cutout, and the printed board and the shield case are temporarily fixed. When the support reaches the bottom of the notch, the mounting height of the printed circuit board is determined. After attaching the shield cases for the printed circuit boards to be divided in this way, the printed circuit board and the shield case are soldered, and by dividing from the dividing line, a plurality of the shield cases are respectively attached to the shield cases. A substrate is obtained.

In the above example, the shield case is attached to the collective board. However, if the above-described supporting portion is formed on the outer periphery of the single board, the shield case having the above configuration can be used. The present invention can be applied to the case where the above-mentioned substrate is attached to the shield case.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is an exploded perspective view of a printed circuit board and a shield case, FIG. 2 is a perspective view showing a state in which the printed circuit board is attached to the shield case, FIG. 3 is a plan view of a state in which the printed circuit board is attached to the shield case, and FIG. It is a top view of a board. In the drawing, reference numeral 3 denotes an aggregate substrate, on which a plurality of circuits are arranged and formed on a single substrate, and after a component is mounted, a plurality of printed boards 2 are obtained by dividing the substrate at a dividing line. Reference numeral 1 denotes a shield case to which the printed board 2 is attached so as to accommodate the printed board 2.

[0013] slit 4 for the printed circuit board 2 to be divided into the collective substrate 3 is formed by press punching, printed circuit board 2 to be this division is held by the supporting portion 2a provided symmetrically I have. In this embodiment, the ends of the slits 4 are extended so that the support portions 2a remain in a tongue shape on the printed circuit board 2 in the divided state, and a V-groove as a dividing line as shown by a broken line 5 is formed on the tip side of the slit 4. This V groove 5
Although it may be formed on both surfaces of collective board 3, at least current
It is formed on the surface of the composite board 3 opposite to the component mounting surface. Also,
The base of the support portion 2a on the printed circuit board 2 side is rounded 2b.
Are formed.

[0014] The shield case 1 has a peripheral portion formed of a collective substrate.
3 is formed to have an outer diameter and a wall thickness capable of being fitted into the slit 4, and a peripheral portion is provided with a notch portion 1a into which the support portion 2a is fitted, and an opening edge of the notch portion 1a A roundness 1b is formed.

When the shield case 1 is mounted on the collective board 4, the peripheral portion of the shield case 1 is pushed into the slit 4 so as to be fitted into the slit 4, and the support portion 2a is guided by the roundness 1b of the opening edge of the cutout portion 1a. Fit into the notch 1a. At this time, the roundness 2b at the base of the support portion 2a acts to push open the side edge of the notch 1a in the direction indicated by the arrow in FIG. 3, and the reaction closely fits the side edge of the notch 1a to form the printed circuit board. 2 and the shield case 1 can be temporarily fixed. When the support 2a reaches the bottom of the cutout 1a, the mounting height of the printed circuit board 2 is determined. After the shield cases 1 of the printed circuit boards 2 to be divided are all attached in this way, the printed circuit boards 2 and the shield cases 1 are soldered, and the shield cases 1 are separated from the V-groove 5 lines. Can be obtained.

In the above example, the shield case 1 is mounted on the collective board 3. However, if the above-described supporting portion is formed on the outer periphery of a single printed circuit board, the shield case 1 having the above-described configuration is provided. By using this, the present invention can be applied to a case where a single printed circuit board is attached to a shield case.

[0017]

According to the printed circuit board mounting structure of the present invention, the roundness of the notch and the roundness of the supporting portion of the printed circuit board are reduced.
By using the shield case of the printed circuit board
Temporary fixation can be performed reliably and easily.
Can perform stitching and installation work stably and efficiently
Become so. As a result, automation of each operation is reliably achieved
it can. Further, in other inventions, in addition to these effects,
Since the shield case for each printed circuit board can be securely and easily attached before dividing the collective board, work efficiency can be significantly increased, and the assembly work and soldering work between the printed circuit board and the shield case it can be reliably automated by a robot or the like. Further, since the shield case does not need to be subjected to a projection process or the like as in the conventional case, the shape is simplified, and the shield case can be manufactured at low cost. Even when dividing the collective substrate to which the shield case is attached, the substrate can be divided by dividing the dividing line, and it is economical without requiring any special equipment.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a printed circuit board and a shield case.

FIG. 2 is a perspective view showing a state in which a printed circuit board is attached to a shield case.

FIG. 3 is a plan view showing a state in which a printed circuit board is attached to a shield case.

FIG. 4 is a plan view of the collective substrate.

FIG. 5 is an exploded perspective view showing a conventional printed circuit board and a shield case.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shield case 1a Notch 1b Roundness 2 Printed circuit board 2a Support part 2b Roundness of the base of a support part 3 Assembly board 4 Slit 5 V groove for splitting

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 9/00

Claims (4)

(57) [Claims] A shield case (1) for accommodating a printed board (2) is provided with a U-shaped notch (1a) and a tongue-shaped support (2a) on the printed board.
The opening edge of the notch (1a) of the shield case is rounded (1
b), and a rounded portion (2b) is formed at the base of the tongue-shaped support portion (1a) of the printed circuit board.
b) the side wall of the notch (1a) is in contact with
When the printed circuit board is housed in the shield case, it is round (2b)
Together with at least There notch (1a) support of the printed circuit board (2a) is fitted into the notch (1a) of the shield case and the like pushed open, the positioning of the printed circuit board mounting height of the shield case A mounting structure for a printed circuit board, which is configured to be temporarily fixed. 2. A printed circuit board mounting structure for mounting a printed circuit board (2) on a shield case (1).
A plurality of printed boards (2), a plurality of slits (4), and a dividing line (5) for dividing the plurality of printed boards are formed on the aggregate board (3).
After the shield case (1) is attached to the shield case, it is configured to be divided at the above-mentioned dividing line, a rounded portion (1b) is formed at the opening edge of the cutout (1a) of the shield case, and a tongue-shaped support of the printed circuit board Round (2a) at the base of the part (1a)
b) is formed and this roundness (2b) is formed on the side of the notch (1a).
The wall comes into contact with the printed circuit board and the shield case
When the printed circuit board is accommodated in the shield case, the support (2a) of the printed circuit board is fitted into the notch (1a) of the shield case so that the roundness (2b) pushes open the notch (1a). A mounting structure for a printed circuit board, wherein the mounting height is determined and at least temporarily fixed. 3. The shield case (1) wherein a plurality of notches (1a) are provided at symmetrical positions.
Or the printed circuit board mounting structure according to 2. 4. The printed circuit board mounting structure according to claim 1, wherein a plurality of tongue-shaped support portions are provided at symmetrical positions on the printed circuit board.