JP2001274529A - Electronic unit in plate shape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thin a plate-shaped electronic unit. SOLUTION: This plate-shaped electronic unit is provided with a printed board 11 in an almost quadrilateral shape for which small-sized electronic components 12 and 13 are respectively mounted on a front surface and a back surface, and a large-sized electronic component 15 mounted on the printed board 11. The printed board 11 is provided with a hole 16 for making the large- sized electronic component 15 pass through, and the large-sized electronic component 15 is inserted to the hole 16 for about a half and attached. In such a manner, the plate-shaped electronic unit is thinned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped electronic unit used by connecting to a personal computer or the like.

[0002]

2. Description of the Related Art A conventional plate-shaped electronic unit will be described below.

As shown in FIG. 5, a conventional plate-shaped electronic unit includes a printed circuit board 2 on which a small electronic component 1 is mounted.
And a large electronic component 3 mounted on the printed circuit board 2.
And consisted of

A small electronic component 4 is also mounted on the back surface of the printed circuit board 2 to increase the mounting density of the plate-shaped electronic unit.

[0005]

However, in such a conventional configuration, it is difficult to reduce the thickness because the large electronic component 3 is mounted on the surface.

That is, as shown in FIG. 6, when the electronic components 1, 3, and 4 are mounted on the front and back surfaces of the printed circuit board 2, respectively, the thickness of the electronic unit is reduced. Is the sum of the height 5 of the small electronic component 4 mounted on the back surface and the thickness of the printed circuit board 2, and the height 5 of the large electronic component 3 mounted on the front surface is the same as the thickness of the electronic unit. It was difficult to reduce the overall thickness as a factor in determining the thickness. Reference numeral 6 denotes the height of the small electronic component 1.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a thin plate-shaped electronic unit.

[0008]

In order to achieve this object, a plate-shaped electronic unit according to the present invention comprises a printed circuit board having a substantially square shape and having small electronic components mounted on the front and back surfaces, respectively. A large electronic component mounted on a printed circuit board, and the printed circuit board is provided with a hole through which the large electronic component is mounted, and the large electronic component is inserted into this hole approximately half. It is attached.

Thus, a thin plate-shaped electronic unit can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a printed circuit board having a substantially rectangular shape and having small electronic components mounted on the front and back surfaces, respectively, and a large printed circuit mounted on the printed circuit board. The printed circuit board is provided with a hole through which the large-sized electronic component is penetrated and mounted, and a plate-shaped body in which the large-sized electronic component is inserted into the hole by approximately half and attached. An electronic unit,
Since such large electronic components are inserted into the holes provided in the printed circuit board, the thickness of the printed circuit board and the thickness (height) of the small electronic components mounted on the back surface are reduced by the thickness of the plate-shaped electronic unit. Is possible.

According to a second aspect of the present invention, there is provided a metal mounting bracket for covering one side of a large-sized electronic component. The large-sized electronic component is fixed to a printed circuit board, and the mounting metal is mounted on a ground of the printed circuit board. The plate-shaped electronic unit according to claim 1, wherein the large-sized electronic component is covered with a metal mounting bracket and attached, so that the large-sized electronic component is securely and firmly mounted on a printed circuit board. Can be.

Further, since the mounting bracket is connected to the ground provided on the printed circuit board, noise is prevented from entering the large-sized electronic component from the outside, and noise generated from the large-sized electronic component is reduced to the outside. There is no adverse effect on

According to a third aspect of the present invention, the mounting bracket is provided with a first claw for pressing and fixing a large electronic component, and a second claw for abutting and fixing the front and back surfaces of the printed circuit board, respectively. The plate-shaped electronic unit according to claim 2, further comprising a flange, wherein the large-sized electronic component is fixed by the first claw, so that the large-sized electronic component can be attached to the mounting bracket without soldering. It is fixed firmly.

Also, since the printed circuit board is mounted with the metal fittings, even if the printed circuit board is turned over without soldering, a large-sized electronic component is fixed to the flange and the second printed circuit board and falls from the printed circuit board. There is nothing.

According to a fourth aspect of the present invention, there is provided a connecting member which uses a surface mount component for a large-sized electronic component and electrically connects an electrode terminal provided on a bottom surface of the surface mount component to a land of a printed circuit board. 4. The plate-shaped electronic device according to claim 3, wherein the connecting member is formed integrally with the mounting bracket, the electrode terminal is connected to the land of the printed circuit board by the connecting member, and the connecting member is separated from the mounting bracket by a dividing portion. It is a unit, and the connecting member is formed integrally with the mounting bracket, so there is no need to separately prepare it as a connecting member, and low cost and low cost can be realized. I can do it.

According to a fifth aspect of the present invention, there is provided the plate-shaped electronic unit according to the fourth aspect, wherein the dividing portion is provided with a V-groove which is open outward. Thereby, the connecting member can be easily separated from the mounting bracket.

Further, since the V-groove is open outward, after the connecting member is cut off, the burr does not come out to the outside, so that the finish is beautiful.

According to a sixth aspect of the present invention, there is provided the plate-shaped electronic unit according to the fourth aspect, wherein a copper alloy is used as the mounting bracket of the invention. It can be thinned, and can be easily soldered to a large-sized electronic component and a substrate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a plate-shaped electronic unit according to an embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a printed circuit board.
2 is installed. Also, small electronic components 13 are mounted on the back surface of the printed circuit board 11. The connector 14 attached to one end of the printed circuit board 11 is for connecting the plate-shaped electronic unit to a personal computer or the like.

Reference numeral 15 denotes a large-sized electronic component. The large-sized electronic component 15 is inserted into a hole 16 formed in the printed circuit board 11 by approximately half, and is attached by a mounting bracket 17.

FIG. 2 is a side view of the plate-shaped electronic unit. That is, since the large-sized electronic component 15 is attached through the hole 16, the thickness direction of the large-sized electronic component 15 is also exposed on the front and back surfaces of the printed circuit board 11, and the overall thickness is reduced. Is possible.

In FIG. 2, the thickness 19 of the small electronic component 12 and the thickness 2 of the small electronic component 13 mounted on the back surface are shown.
Assuming that 0 and the thickness of the printed circuit board 11 are 21, the thickness of the plate-shaped electronic unit is the sum of 19, 20, and 21, and this thickness is absolutely necessary.

On the other hand, if the thickness 18 of the large electronic component 15 is smaller than the total thickness of the above-mentioned 19, 20, and 21, the large electronic component 15 increases the thickness of the plate-shaped electronic unit. There is nothing.

That is, as compared with the conventional case, the thickness of the small electronic component 13 mounted on the back surface and the thickness 21 of the printed circuit board 11 can be reduced even if the large electronic component 15 is mounted. it can.

When the thickness 18 of the large electronic component 15 is larger than the total thickness of the respective thicknesses 19, 20, and 21, the small electronic component 1 provided on the front surface or the rear surface is provided.
It is thinner if one is adjusted to either 2 or 13 thickness.

When the thickness 18 of the large electronic component 15 is smaller than the total thickness of the respective thicknesses 19, 20, and 21, it is preferable to place the electronic component 15 just in the middle so as not to protrude to either of them. Is important.

FIG. 3 is a perspective view of a main part in which a mounting bracket 17 is fitted to a large-sized electronic component 15.

In FIG. 3, the large electronic component 15 uses a dielectric filter which is a surface mount component. Therefore, the terminal electrode 22 is formed on the bottom surface of the large electronic component 15.

Further, a connection member 23 is provided on the mounting bracket 17, and one of the connection members 23 is connected to the terminal electrode 2.
2 and the other is connected to the land 24 of the printed circuit board 11. The connecting member 23 is connected to the connecting member 25.
And are formed integrally with the mounting bracket 17 through the through hole.

V between the connecting member 25, the connecting member 23 and the mounting member 17
A groove 26 is formed.

As described above, the connecting member 23 is attached to the mounting bracket 1.
7 is formed integrally with the terminal electrode 22 in a state where the mounting bracket 17 is attached to the large-sized electronic component 15.
And the connection member 23 can be reflow-soldered.

In the state where soldering is completed,
By bending the connecting member 25, the connecting member 2 can be easily formed.
5 can be removed, the mounting bracket 17 and the connecting member 2 can be removed.
3 is electrically separated.

FIG. 4 is a side view when a large-sized electronic component 15 is mounted on the printed circuit board 11.

The mounting bracket 17 is provided with a first claw 27, and the first claw 27 is fixed so as to surround the large electronic component 15.

Further, a flange 28 is provided on the upper surface of the printed board 11, and the printed board 11 is fixed between the flange 28 and a second claw 30 formed on the holding member 29.

[0037]

As described above, according to the present invention, a printed circuit board is provided with a hole through which a large-sized electronic component is mounted, and the large-sized electronic component is inserted into this hole by approximately half. Since the electronic components are attached, the large-sized electronic components protrude from the front surface and the rear surface of the printed circuit board, so that the electronic unit can be made thinner as a whole.

[Brief description of the drawings]

FIG. 1 is a perspective view of a plate-shaped electronic unit according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view of a main part of the same.

FIG. 4 is a sectional view of a main part of the same.

FIG. 5 is a perspective view of a conventional plate-shaped electronic unit.

FIG. 6 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Printed circuit board 12 Small electronic component 13 Small electronic component 15 Large electronic component 16 Hole 17 Mounting bracket

Claims (6)

[Claims] 1. A printed circuit board having a substantially square shape and having small electronic components mounted on its front and back surfaces, respectively, and a large electronic component mounted on the printed circuit board. A plate-shaped electronic unit in which a hole through which the electronic component is mounted is provided, and the large-sized electronic component is inserted into this hole by approximately half. 2. The large-sized electronic component according to claim 1, wherein the large-sized electronic component is fixed to a printed circuit board with a metal fitting that covers one surface of the large-sized electronic component, and the fitting is connected to a ground of the printed circuit board. Plate-shaped electronic unit. 3. The mounting bracket includes a first claw for pressing and fixing a large-sized electronic component, and a second claw and a flange for contacting and fixing the front and back surfaces of the printed circuit board, respectively. 3. The plate-shaped electronic unit according to 2. 4. A large-sized electronic component using a surface-mounted component, and an electrode terminal provided on a bottom surface of the surface-mounted component;
A connecting member for electrically connecting the land of the printed circuit board is formed integrally with the mounting bracket, the connecting member connects the electrode terminal and the land of the printed circuit board, and the connecting member is separated from the mounting bracket by a dividing portion. The plate-shaped electronic unit according to claim 3, wherein the plate-shaped electronic unit is separated. 5. The plate-shaped electronic unit according to claim 4, wherein the divided portion is provided with a V-groove that opens outward. 6. The plate-shaped electronic unit according to claim 4, wherein a copper alloy is used for the mounting bracket.