JP2800799B2 - Printed circuit board with positioning tab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a portable telephone and a PHS
Flexible printed circuit board used for a small portable terminal device, etc., and has a positioning tab for accurate soldering, particularly the tab is obstructed even after soldering The present invention relates to a printed circuit board provided with a positioning tab without any problem.

[0002]

2. Description of the Related Art In general, a flexible printed circuit board having flexibility used for a small portable terminal device such as a mobile phone or a PHS is required to perform accurate soldering with another printed circuit board or the like. A tab having a positioning hole passing through the positioning pin is provided.

FIG. 6 is a schematic plan view showing a conventional flexible printed circuit board provided with such a positioning tab. FIG. 7 is an exploded perspective view showing a state where the conventional printed circuit board shown in FIG. 6 is soldered to another printed circuit board.

As shown in these figures, this type of conventional printed circuit board is provided with a large number of comb-shaped narrow pitch terminals 101 on one end side of a board body 100, and a positioning member is provided near a root portion of the terminal 101. Tab 200 extends outward from the side of the substrate body 1. The tab 200 has a positioning hole 20 that penetrates a positioning pin 501 protruding from a positioning jig 500 shown in FIG.
1 is drilled.

When such a printed circuit board 100 is connected by soldering to another rigid printed circuit board or the like, since the printed circuit board 100 has flexibility, it is firmly positioned and a large number of narrow pitch terminals 101 are connected. It is necessary to accurately solder to the corresponding terminals on the other side of the printed circuit board.

Therefore, as shown in FIG. 7, a positioning hole 402 of another printed circuit board 400 is penetrated and fixed to a positioning pin 502 of a positioning jig 500, and a tab 200 of the printed circuit board 100 is projected to the positioning jig 500. It is fixed to the positioning pin 501 provided and soldering is performed in that state. Thereby, the printed circuit board 100
Terminal 101 of another printed circuit board 400 can be accurately soldered.

[0007]

However, the positioning tab provided on such a conventional printed circuit board is provided only for accurately soldering the printed circuit board to another printed circuit board or the like. Therefore, it is essentially unnecessary in an electric circuit. Therefore, after the soldering of the printed circuit board is completed, such positioning tabs are not only unnecessary for the device itself such as a mobile phone, but also hinder the mounting space. .

In particular, in a small device such as a mobile phone or a PHS, it is extremely important to effectively secure and use a mounting space and reduce the size of a housing. The necessity of a space (volume) for accommodating unnecessary components increases a mounting volume in a housing, and causes a serious problem that it is difficult to miniaturize a portable terminal device such as a mobile phone or a PHS. Will occur.

The present invention has been proposed in order to solve such a problem of the prior art, and it is possible to accurately perform soldering to another printed circuit board or the like by using a positioning tab structure. After soldering, the tabs do not interfere with the mounting space and can be housed in a housing of the same volume as a printed circuit board without a positioning tab structure. An object of the present invention is to provide a printed circuit board provided with a positioning tab that can reduce the size of the device.

[0010]

According to a first aspect of the present invention, there is provided a printed circuit board provided with a positioning tab, the positioning hole extending outward from a side of the substrate body. Wherein the metal foil for maintaining the bent state of the tab is embedded in the base of the tab.

According to the printed circuit board having the positioning tab of the present invention having such a configuration, by bending the portion in which the metal foil is buried, the return force against the bending of the flexible printed circuit board can be obtained. The bent state of the tab can be maintained. Thus, the positioning tab can be housed in a housing similar to a printed circuit board without a tab structure without obstructing the mounting space.

A printed circuit board having a positioning tab according to a second aspect of the present invention has a configuration in which an adhesive portion to which a bent tab is adhered is provided on a surface of the substrate body.
According to the printed circuit board having the positioning tab of the present invention having such a configuration, since the printed circuit board body has the adhesive portion, the tab is bent and fixed to the printed circuit board side by the adhesive portion. can do.

According to a third aspect of the present invention, there is provided a printed circuit board having a positioning tab, wherein a slit is formed at a root portion of the tab along an outer shape of the substrate body. According to the printed circuit board having the positioning tab of the present invention having such a configuration, the tab can be easily and accurately bent toward the printed circuit board body by bending the tab along the slit.

Further, the printed circuit board provided with the positioning tab according to claim 4 is configured such that the slit and the positioning hole formed in the tab are formed at the same position. According to the printed circuit board having the positioning tab of the present invention having such a configuration, the structure of the entire printed circuit board can be further simplified by using both the slit for bending the tab and the positioning hole.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printed circuit board having a positioning tab according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing a first embodiment of a printed circuit board having a positioning tab according to the present invention, and FIG. 2A is a printed circuit board shown in FIG. A
FIG. 2B is a sectional view taken along the line BB of FIG. FIG. 3 is an exploded perspective view showing a state in which the printed circuit board of the present embodiment shown in FIG. 1 is soldered to another printed circuit board. FIG. It is a part perspective view.

As shown in these figures, the printed circuit board provided with the positioning tabs of the present embodiment has substantially the same structure as the above-mentioned conventional printed circuit board. The whole is formed of a flexible printed circuit board having a large number of narrow pitch terminals 11 having flexibility.

A positioning tab 20 extends from the side of the substrate body 10 to the outside in the vicinity of the base of the terminal 11 of the substrate body 10. The tab 20 is provided with a positioning hole 21 penetrating a positioning pin 51 protruding from a positioning jig 50 shown in FIG.

Here, a metal foil 21a is embedded in a portion of the tab 20 where the positioning hole 21 is formed. That is, as shown in FIG. 2A, the substrate body 10 provided with the tab 20 is configured as a flexible substrate in which the cover array 10b is adhered in a layer on the surface of the base 10a. A metal foil 21a is sandwiched between the base 10a and the cover array 10b in the portion of the positioning hole 21 of 20, and the positioning hole 21 is punched and formed together with the metal foil 21a. Thereby, the periphery of the positioning hole 21 has a certain hardness, and the insertion into the positioning pin 51 described later can be performed easily and reliably.

On the other hand, a metal foil 2
3 is embedded and a tab 20 bent from the root portion
Is irreversible. That is, FIG.
As shown in (b), a cover array 10b is adhered to the surface of the base 10a in a layered manner, and the base portion of the substrate body 10 constituting the flexible substrate, on which the tab 20 is formed, is provided with:
A metal foil 23 is sandwiched and buried between the base 10a and the cover array 10b.

By embedding the metal foil 23 at the base of the tab 20 in this manner, by bending the metal foil 23, it is possible to withstand the return force against the bending of the flexible printed circuit board having high rigidity. Thus, the bent state of the tab 20 can be maintained.

It should be noted that if the metal foil 23 can be bent, it can withstand the return force of the flexible printed circuit board which is strong and can maintain the bent state of the tab 20. Although the type is not particularly limited,
Copper foil is preferred.

A slit 22 for bending is formed along the outer shape of the substrate body 10 at the base of the tab 20 where the metal foil 23 is embedded. This slit 22
The base portion of the tab 20 is formed along the outer shape of the substrate body 10, and like the positioning hole 21 described above, the substrate body 1
0 is punched out together with the metal foil 23.

The slits 22 allow the tab 20 to be easily and accurately formed along the slits 22.
It can be bent to the zero side. In addition, the slit 22
In the present embodiment, the punching structure is penetrating,
As long as the tab 20 can be easily and accurately bent, a groove-like slit that does not penetrate may be used.

Further, on the surface of the substrate body 10, there is provided an adhesive portion 30 to which the tab 20 bent along the slit 22 is adhered. The bonding portion 30 is formed, for example, by applying an adhesive or the like on the surface of the substrate main body 10 and is bent so that the tab 20 is bonded. The tabs 20 can be fixed to the printed circuit board main body 10 in a state where the tabs 20 are bent by the adhesive portions 30.

Next, the operation of the printed circuit board having the positioning tab of the present embodiment having the above-described configuration will be described with reference to FIGS. First, as shown in FIG. 3, another printed board 40 to be connected to the present printed board is fixed to a positioning jig.

To fix another printed circuit board 40, a positioning hole 42 formed in the board is penetrated and fixed to a positioning pin 52 of a positioning jig 50, and the other printed circuit board 40 is fixed to the jig 50. . The other printed circuit board 40
Is usually constituted by a rigid substrate.

Next, the positioning tab 20 of the printed circuit board 10 is passed through and fixed to the positioning pins 51 projecting from the positioning jig 50 by the same procedure as that of the other printed circuit boards 40. Fixed to.

Then, in this state, it is confirmed that the positions of the terminals 41 of the printed circuit board 40 and the terminals 11 of the printed circuit board 10 coincide with each other. Printed circuit board 40
Connect to After the connection, both substrates are removed from the positioning jig 50.

Next, as shown in FIG. 4, the tab 20 is bent along the slit 22, and the tab 20 and the substrate main body 10 are bonded to each other at the bonding portion 30 on the printed circuit board main body 10.
Is fixed to the substrate body 10 side. At this time, the tab 20 can be easily bent along the slit 22, and the tab 20 remains bent toward the substrate body 10 due to the bending force of the metal foil 23 and the bonding force of the bonding portion 30. Held in state.

As described above, according to the printed board having the positioning tabs of the present embodiment, the tab 20 having the positioning holes 21 protruding from the printed board main body 10 on which the circuit pattern is formed is placed on the printed board main body 10. By folding, the printed circuit board 10 can be made to have the same outer dimensions as the minimum required for a portable terminal device such as a mobile phone or PHS without a tab structure.
As a result, a special space for housing the tab structure in the housing can be omitted, reducing the volume of the entire device,
The size of the housing of the portable terminal device or the like can be reduced.

Further, a slit 2 is formed on the bending line of the tab 20.
By forming 2, the tab 20 can be easily bent. Further, by providing the adhesive portion 30 on the printed circuit board, the bent tab 20 can be fixed to the substrate body 10. This makes it easier to assemble and manufacture mobile terminal devices such as mobile phones and PHSs.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic plan view of a principal part showing a second embodiment of the printed circuit board provided with the positioning tab of the present invention.

As shown in the figure, the printed circuit board of this embodiment is a modified example of the printed circuit board of the first embodiment described above, and includes a slit formed at the base of the tab 20 for bending and a tab 20. Is formed at the same position. That is, in the present embodiment, the positioning holes 21 and the slits 22 of the tab 20 in the above-described first embodiment are formed as positioning and slit holes 24.

According to the printed circuit board having the positioning tabs of this embodiment, the slits for positioning the tabs and the positioning holes are formed as the slits 24 for positioning and use. It is not necessary to provide the slits separately, and the structure of the entire printed circuit board can be further simplified.

[0035]

As described above, according to the printed circuit board having the positioning tabs of the present invention, it is possible to perform accurate soldering to another printed circuit board or the like using the positioning tab structure. After soldering, the tabs can be housed in a housing of the same volume as a printed circuit board without a positioning tab structure without disturbing the mounting space, and the size of portable terminal devices such as mobile phones and PHSs can be reduced. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic main part plan view showing a first embodiment of a printed circuit board provided with a positioning tab of the present invention.

2A is a cross-sectional view taken along line AA of the printed circuit board shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB.

FIG. 3 is an exploded perspective view showing a state where the printed circuit board according to the first embodiment of the present invention shown in FIG. 1 is soldered to another printed circuit board.

FIG. 4 is a main part perspective view showing a state in which a tab is bent after the printed circuit board according to the first embodiment of the present invention shown in FIG. 1 is soldered to another printed circuit board;

FIG. 5 is a schematic plan view of a principal part showing a second embodiment of a printed circuit board provided with a positioning tab of the present invention.

FIG. 6 is a schematic plan view showing a printed circuit board provided with a conventional positioning tab.

7 is an exploded perspective view showing a state in which the conventional printed circuit board shown in FIG. 6 is soldered to another printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Flexible printed circuit board main body 10a Base 10b Cover array 11 Terminal 20 Tab 21 Positioning hole 22 Slit 23 Metal foil 24 Positioning hole double use slit 30 Adhesive part

Claims (4)

(57) [Claims] 1. A printed circuit board provided with a tab having a positioning hole extending outward from a side portion of a substrate body, wherein a bent state of the tab is maintained at a root portion of the tab. A printed circuit board provided with a positioning tab, in which a metal foil is embedded for use. 2. The printed circuit board having a positioning tab according to claim 1, further comprising: an adhesive portion to which a bent tab is adhered on a surface of the substrate main body. 3. A printed circuit board having a positioning tab according to claim 1, wherein a slit is formed in a root portion of the tab along an outer shape of the substrate body. 4. A printed circuit board having a positioning tab according to claim 3, wherein said slit and said positioning hole formed in said tab are formed at the same position.