JP2001339136A - Flexible printed wiring board provided with electronic component with lead - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible printed wiring board provided with an electronic component with leads which is so installed as to be kept in a specified position without using an adhesive or special member. SOLUTION: The flexible printed wiring board 1 is formed with two belt-like parts 1a, 1b which have copper foil sections 1c, 1d formed when forming a circuit pattern. The electronic component 2 with leads has two leads 2a, 2b soldered to lands 1e, If of the circuit pattern and has a main body 2c held between the two belt-like parts 1a, 1b. When soldering the electronic component 2 with leads to the flexible printed wiring board 1, the work is done with the main body part 2c being held in advance between the two belt-like parts 1a, 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed circuit board on which electronic parts with leads such as a quartz oscillator are mounted.

[0002]

2. Description of the Related Art When an electronic component is soldered to a flexible printed wiring board, if the electronic component is a chip component, the main body of the electronic component is substantially in close contact with the flexible printed wiring board. However, in the case of electronic components with leads, simply soldering the leads to the flexible printed wiring board cannot keep the body in close contact with the flexible printed wiring board. If not handled carefully, the mounting orientation with respect to the flexible printed wiring board may change or the leads may be damaged. Therefore, in order to prevent such a situation from occurring, conventionally, after the leads are soldered, the main body is bonded to the flexible printed wiring board with an adhesive. Further, as shown in FIG. 1 of Japanese Utility Model Publication No. 4-32778, it is conceivable that a predetermined mounting posture can be maintained by other members.

[0003]

However, when the main body of the electronic component with leads is bonded to the flexible printed wiring board with an adhesive, it is necessary to position the main body and apply the adhesive each time. It is not necessarily advantageous in terms of man-hours, and it is necessary to keep the amount of adhesive constant or to prevent the adhesive from flowing until the adhesive is completely cured. Problems. In addition, the first publication of the above publication
When using the components shown in the figure, it is extremely disadvantageous in terms of cost, because it is necessary to prepare another member or to solder the member to the flexible printed wiring board. It will be something.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide an electronic component with leads without using an adhesive or preparing a special member. Another object of the present invention is to provide a flexible printed wiring board mounted so as to maintain a predetermined posture.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for forming two strips which are punched out from a portion of a flexible printed circuit board and arranged substantially parallel to adjacent positions, and which are provided with leads. The electronic component has its lead soldered to the flexible printed wiring board at one position in a direction substantially orthogonal to the length direction of the two strips, and the main body is held between the two strips. To have been.

In this case, it is preferable that, of the two strips, the strip located farther from the lead is formed wider than the strip located closer to the lead.
The wide band-shaped portion can be used as a circuit pattern forming portion.

Further, when at least one of the two belt-like portions is cut at a predetermined position in the length direction to form one or two free ends, the main body portion of the electronic component with leads is formed. Installation becomes easy.

[0008] When at least one of the two strips has a body foil along the length thereof, the main body of the electronic component with leads is positioned between the two strips. , Will be firmly held.

Further, in order to achieve the above object, according to the present invention, unlike the above-described configurations, the portion forming the window portion can be bent from the surface of the flexible printed wiring board. In the electronic component with leads, the lead may be bent to a substantially right angle and soldered to the flexible printed wiring board by passing the main body through the window with the portion bent.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to five examples shown in FIGS. First, FIG.
The first embodiment will be described with reference to FIG. The flexible printed wiring board 1 is formed by punching out two regions to form two belt-like portions 1a which are arranged close to each other and substantially parallel to each other.
1b is formed. And the two strips 1
a and 1b have copper foil portions 1c,
1d is formed. In the case of this embodiment, the copper foil portions 1c and 1d are formed separately from the circuit pattern.
In some cases, it may be a part of the copper foil portion of the circuit pattern.

The leaded electronic component 2 of the present embodiment is a quartz oscillator, and its two leads 2a and 2b are positioned at one position in a direction substantially orthogonal to the length direction of the two strips 1a and 1b. And soldered to the lands 1e and 1f of the circuit pattern. The main body 2c of the electronic component 2 with leads is
It is held between the two strips 1a, 1b.
Therefore, when the electronic component with lead 2 is soldered to the flexible printed wiring board 1, the main body 2c is held in advance between the two strips 1a and 1b.

As described above, in the case of the present embodiment, the electronic component with leads 2 can be held in a predetermined posture without preparing an adhesive or a special member. In the case of the present embodiment, the two strips 1a and 1b
Since the copper foil portions 1c and 1d are formed, the belt-like portions 1a and 1b are given appropriate hardness, and can be suitably held. However, such a copper foil portion 1c,
1d may be formed on only one of the strips, or in some cases it is not necessary to form both.
The present invention is not limited to the configuration of the embodiment. Further, in the present embodiment, the two strips 1a,
Although the length and width of 1b are substantially the same, there is no particular need to do so, and there is no problem even if the width of the band-like portion 1a is formed large and a circuit pattern is formed on a part thereof. . These are the same in the following second to fourth embodiments.

Next, a second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment in that the belt-like portion 1 is used.
b is cut at a substantially intermediate position in the longitudinal direction, so that two free ends 1b-1 and 1b-2 are formed. Other configurations are exactly the same as those of the first embodiment, except that the copper foil portions 1c and 1d are not shown. Therefore, the same members and parts are denoted by the same reference numerals.

In the case of this embodiment, it is easy to arrange between the belt-like portion 1a and the divided belt-like portion 1b. This is the third,
The same applies to the fourth embodiment. Further, in the case of the present embodiment, it is preferable to form the above-described copper foil portion 1d at least on the divided strip portion 1b from the viewpoint of holding power. Furthermore, in the present embodiment, the strip 1b is divided, but when the lands 1e and 1f are formed on opposite surfaces, it is advantageous to divide only the strip 1a.

Next, a third embodiment will be described with reference to FIG. This embodiment is different from the first embodiment in that the belt-like portion 1 is used.
b is a cut-out of a part in the length direction. for that reason,
Only one free end 1b-3 is formed on the strip 1b. Other configurations are the same as those in the first embodiment, except that the copper foil portions 1c and 1d are not shown. Therefore, the same members and portions are denoted by the same reference numerals.
Also in the case of the present embodiment, it is preferable to form the above-described copper foil portion 1d on the band-shaped portion 1b from the viewpoint of the holding force. When the lands 1e and 1f are formed on the opposite surfaces, it is advantageous to divide only the strip 1a.

Next, a fourth embodiment will be described with reference to FIG. This embodiment is different from the above-described third embodiment in that the belt-shaped portion 1
A part of the length direction a is cut away. The cut position is on the opposite side of the band 1b. The other configuration is exactly the same as that of the third embodiment, so that the same members and portions are denoted by the same reference numerals. Then, in the case of the present embodiment, it is preferable to form the above-described copper foil portion 1d on the two band portions 1a and 1b from the viewpoint of the holding force.

Finally, a fifth embodiment will be described with reference to FIG. The configuration of this embodiment is considerably different from the above-described four embodiments, and the flexible printed wiring board 1 is not provided with the two belt-like portions 1a and 1b as described above. That is, the flexible printed wiring board 1 of the present embodiment has an upright portion 1g which can be cut and bent in three directions, and has a window portion 1h at a substantially central portion thereof.
Also, the leads 3a, 3a of the electronic component 3 with leads according to the present embodiment.
b, after being bent at a substantially right angle, the two lands 1e,
1f, and the main body 3c is inserted into the window 1h. Accordingly, in the case of this embodiment, the leads 3a and 3b are soldered after the main body 3c is inserted into the window 1h. The electronic component 3 with leads can be held in a predetermined posture without preparing a special member.

[0018]

As described above, according to the present invention, an electronic component with leads can be easily attached to a flexible printed wiring board without using an adhesive or special members. In addition, since a predetermined posture can be maintained with respect to the flexible printed wiring board, an extremely low-cost flexible printed wiring board having electronic components with leads can be manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment.

FIG. 2 is a perspective view showing a second embodiment.

FIG. 3 is a perspective view showing a third embodiment.

FIG. 4 is a perspective view showing a fourth embodiment.

FIG. 5 is a perspective view showing a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible printed wiring board 1a, 1b Strip part 1a-1, 1b-1 to 1b-3 Free end 1c, 1d Copper foil part 1e, 1f Land 1g Standing part 1h Window part 2, 3 Leaded electronic components 2a, 2b, 3a, 3b lead 2c, 3c main body

Claims (5)

[Claims] 1. A flexible printed wiring board is formed by punching a part of a flexible printed wiring board to form two strips arranged substantially in parallel at adjacent positions. And an electronic component with leads, characterized in that the main body is held between the two strips by soldering to the flexible printed wiring board at one position in a direction substantially orthogonal to Flexible printed wiring board. 2. The device according to claim 1, wherein the one of the two strips that is farther from the lead is formed wider than the one that is closer to the lead. A flexible printed wiring board comprising the electronic component with a lead according to the above. 3. At least one of the two strips is
The flexible printed wiring board provided with the electronic component with leads according to claim 1 or 2, wherein the flexible printed wiring board is cut at a predetermined position in the length direction to form one or two free ends. 4. At least one of said two strips is
The flexible printed circuit board provided with the electronic component with leads according to any one of claims 1 to 3, wherein the flexible printed circuit board has a body foil portion along the length direction. 5. A portion forming a window portion is bendable from a plate surface of a flexible printed wiring board, and the electronic component with a lead is configured such that the main body portion is attached to the window portion by folding the portion. A flexible printed wiring board provided with electronic components with leads, wherein leads which are passed through and bent at substantially right angles are soldered to the flexible printed wiring board.