JPH07170040A - Flexible printed-wiring board - Google Patents

Abstract

PURPOSE:To prevent a flexible printed-wiring board from being obliquely inserted in a connector by a method wherein a plurality of patterns are provided between semitransparent and flexible insulating layers and a working mark to indicate an assembly is provided on the patterns. CONSTITUTION:A slider part 4a is moved upward and a connector is put in a state that it is released so as to be able to insert a flexible printed-wiring board in the connector. After this, the printed-wiring board is inserted in an insertion port 4b and a contact part 10 is brought into contact with the bottom of the connector 4. In this state, patterns 1a to 1a are connected to the connector. After this, it is verified that a segment 2a linked between both protrusions and an upper line 4c of the connector 4 become equal or become parallel to each other, the part 4a is lowered to put in a state that it is locked and the patterns 1a to 1a and each contact are brought into contact with each other by pressure. As a result, the connector 4 and the printed-wiring board reliably become parallel to each other. Thereby, the printed-wiring board can be prevented from being obliquely inserted in the connector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed wiring board.

[0002]

2. Description of the Related Art In recent years, electronic devices are required to be extremely small and thin, and in order to meet these demands, flexible printed wiring boards having good refraction resistance and capable of high-density wiring are frequently used.

Here, the flexible printed wiring board and the printed circuit board 3 are connected by inserting the flexible printed wiring board into the connector 4 soldered to the printed circuit board 3. As shown in FIG. 5, the connector 4 is in a released state when it is raised upward, and is in a locked state when it is lowered downward, and terminals (not shown) that come into contact with the respective patterns 1a, 1a ... Of the flexible printed wiring board. ZIF (Zero) formed from the main body 4b provided with
Insertion Force) connector.

Since the ZIF connector can be connected to the printed circuit board 3 only by moving the slider portion 4a up and down, there is a high possibility that the flexible printed wiring board is obliquely inserted, and the reliability of contact between the pattern 1a and the contact is low. May be.

In order to prevent such oblique insertion, a device as shown in FIG. 5 has been conventionally used. FIG. 5A shows a notch 5 provided in parallel with the edge of the insulating layer 1 of the flexible printed wiring board to indicate an accurate insertion position, and FIG. 5B shows the notch 5 instead. The protrusion 6 is provided. Further, FIG. 5 (c) shows a case where silk printing 7 is applied perpendicularly to the insertion direction of the flexible printed wiring board.

[0006]

However, in the above-mentioned conventional example, as shown in FIG. 5 (a), a concentrated stress is generated during insertion / removal of the flexible printed wiring board from the connector 4 or during transportation or storage thereof, resulting in a cutout. 5 had a defect that a crack was generated and the flexible printed wiring board was damaged.

The flexible printed wiring board is manufactured by punching a long roll material 8 into a predetermined shape 9. For example, when the projections 6 are provided on both sides as shown in FIG. Compared with the case where the protrusion 6 shown in FIG. 6 (a) is not provided, the width of the flexible printed wiring board needs to be larger than that of a normal flexible printed wiring board, resulting in poor yield of the flexible printed wiring board and increased cost. It had a drawback.

Further, in FIG. 5 (c), it is necessary to carry out the step of silk printing 7 after the production of the flexible printed wiring board, which has a drawback of increasing the cost of the flexible printed wiring board.

The present invention has been made to solve the above drawbacks, and it is an object of the present invention to provide a flexible printed wiring board which reduces the cost, prevents diagonal insertion into a connector, and further improves the assembly efficiency. To aim.

[0010]

The above object of the present invention is to provide a plurality of patterns 1a, 1a between semi-transparent and flexible insulating layers 1.
It is achieved by providing a flexible printed wiring board which is provided with a work mark 2 for instructing the pattern 1 to assemble.

[0011]

The flexible printed wiring board according to the present invention is
It is formed by providing protrusions on both patterns 1a, 1a. The flexible printed wiring board provided with the protrusions is accurately inserted into the connector 4 as the work mark 2 of the assembly instruction,
Diagonal insertion is prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. In this embodiment, the flexible printed wiring board shown in FIG. 1A has a semi-transparent base film 1b made of a polyimide-based material having a copper foil attached to the surface thereof.
, A plurality of patterns 1a, 1a, ... Formed by etching copper foil, and a base for covering the pattern forming layer of the base film 1b so as to cover the entire surface and protecting the plurality of patterns 1a, 1a ,. It is formed of a cover lay 1c made of the same material as the film 1b. Further, a contact portion 10 formed by peeling off the cover lay 1c is provided at an end portion of the flexible printed wiring board to be inserted into the connector 4 which will be described later in order to make contact between the contact of the connector 4 and the pattern 1. ing.

Work marks 2 for instructing assembly are provided on the outside of the pattern 1 located at both ends of the insulating layer 1 of the flexible printed wiring board. Here, in FIGS. 1 and 2, the work mark 2 is provided to indicate the insertion position of the connector 4 to the operator, and is located laterally of the patterns 1a, 1a arranged on both sides of the flexible printed wiring board. It bulges to form a protrusion.

This projection 2 is the same as or above the connector 4 so as to be surely visible, and the line segment 2a connecting both projections 2 and 2 is the same or parallel to the upper edge 4c of the connector 4. Is provided. Further, the shape of the protrusion 2 is considered so as to relieve the stress generated in the pattern 1a, has a protrusion amount of about 0.5 to 1 mm, and is formed in a curved line so as not to form the sharp protrusion 2. Things are desirable.

Incidentally, the connector 4 of the illustrated embodiment
Uses the ZIF connector 4 described in the conventional example, and the terminals (not shown) provided on the connector 4 are connected to the printed circuit board 3
It is soldered to.

Therefore, in the embodiment, as shown in FIG. 1 (b), the flexible printed wiring board is connected to the printed board 3 as follows. First, the slider portion 4a is moved upward to be in a released state so that the flexible printed wiring board can be inserted. After this,
The flexible printed wiring board is inserted into the insertion port 4d, and the contact portion 10 is brought into contact with the bottom of the connector 4. In this state, the patterns 1a, 1a, ... Are connected to the contacts of the connector 4 not shown. After that, after confirming that the line segment 2a connected by both protrusions and the upper edge 4c of the connector 4 are the same or parallel, the slider portion 4a is lowered to the locked state, and the patterns 1a, 1a ... And press contact with each contact.

As a result, the connector 4 and the flexible printed wiring board are surely parallel to each other, so that the oblique insertion of the flexible printed wiring board is prevented. Further, when the pattern 1a of the flexible printed wiring board is used for a power supply and a ground system and is thick enough, as shown in FIG. 3, the patterns 1a, 1a located at both ends of the insulating layer 1 of the flexible printed wiring board are used. It is possible to prevent the oblique insertion of the flexible printed wiring board by providing the notch 2 on the outer side of. The shape of the notch 2 is preferably one that relieves the stress generated in the pattern 1, like the protrusion, and has a notch amount of about 0.5 to 1 mm inside the pattern 1 to form a sharp protrusion. It is desirable that it is formed by a curved line so that it does not occur.

Further, in the above embodiment, the upper edge 4c of the connector 4 is used as the reference line 2a to show the construction effective for judging the abnormal insertion of the flexible printed wiring board. It is also possible to provide a pair of work marks 2 on a line segment parallel to the insertion side edge 1d of the plate.

Further, when it is necessary to form the flexible printed wiring board in a complicated shape such as an L-shape, the flexible printed wiring board indicated by a line segment is bent as shown in FIG. It is also possible to provide at least one pair of the above-mentioned protrusions at the location to attach the work mark 2. Further, in FIG. 4, the pattern 1 is shown to be provided with the protrusions 2, but when the pattern 1 is sufficiently thick, the notch 2 shown in the figure may be provided.

Although the projections or notches serving as the work marks 2 are provided in the pattern 1 located at the most end portions of the insulating layer 1 of the flexible printed wiring board in FIGS. However, at least one pair may be provided, and it may be provided at another place. Further, the work mark 2 may be provided by a combination of protrusions and notches.

[0021]

As described above, by providing work marks on the patterns on both sides of the flexible printed wiring board,
It is possible to prevent the connector from being obliquely inserted.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, (a) is a diagram showing a flexible printed wiring board, and (b) is a diagram showing a state in which the flexible printed wiring board is inserted into a connector. .

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention, (a)
Is a diagram showing a flexible printed wiring board, (b)
FIG. 6 is a diagram showing a state in which a flexible printed wiring board is inserted in a connector.

FIG. 4 is a diagram showing a modified example of the present invention, (a) is a diagram showing a flexible printed wiring board, and (b) is a diagram showing a state in which the flexible printed wiring board is bent.

FIG. 5 is a diagram showing a conventional example, FIG. 5A is a diagram showing a state in which a notch is provided in a flexible printed wiring board and the connector is inserted into a connector, and FIG. FIG. 6C is a diagram showing a state in which the flexible printed wiring board is silk-printed and inserted into the connector.

FIG. 6 is a view showing framing of a flexible printed wiring board, FIG. 6 (a) is a view showing framing normally,
FIG. 7B is a diagram in which the frame is framed in consideration of the protrusion.

[Explanation of symbols]

 1 Insulating Layer 1a Pattern 1d Insert Side Edge 2 Work Mark 2a Parallel Line 4c Upper Edge

Claims (5)

[Claims] 1. A pattern (1a) comprising a plurality of patterns (1a, 1a ...) Between a semi-transparent and flexible insulating layer (1).
A flexible printed wiring board provided with a work mark (2) for instructing assembly. 2. The flexible printed wiring board according to claim 1, wherein the work mark (2) is formed by a protrusion. 3. The flexible printed wiring board according to claim 1, wherein the work mark (2) is formed by a notch. 4. The work mark (2) is an insertion side edge (1
The flexible printed wiring board according to claim 1, 2 or 3, wherein at least one pair is provided on the parallel line (2a) with respect to d). 5. The work mark (2) is provided on the same line (2a) as the upper edge (4c) of the connector to be inserted or on an upper parallel line (2a). The flexible printed wiring board described.