JPH0611521Y2 - Flexible board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flexible substrate used for wiring of a magnetic head of a cassette tape player, and particularly to positioning and bending of an end of the flexible substrate and a jig. The present invention relates to a flexible board which can facilitate the insertion of the formed end into the hole of the wiring board and facilitate the soldering work between the end of the flexible board and the wiring board.

[Conventional technology]

FIG. 5 is a perspective view showing an end portion of a conventional flexible board and a printed board to which the end portion is attached.

In FIG. 5, reference numeral 11 is a flexible substrate formed by forming a conductor pattern 11f on a base film 11g. Base film 11 of Hino flexible substrate 11
Since g is formed such that all the end portions of the conductor pattern 11f are aligned in a horizontal row as shown in FIG. 5, a large space is used. In addition, the flexible substrate 11
Is the arrow α when its end is bent as shown in the figure.
It is moved in the direction and inserted into the square hole 2a of the printed circuit board 2. This insertion operation in the direction of the arrow α is performed by the stopper protrusion 1
When 1a, 11a and 11c, 11c are brought into contact with the inner surface of the printed circuit board 2, further insertion in the direction of the arrow α is prevented, and the insertion amount of the flexible substrate 11 is regulated. .

Then, the conductor pattern 11f of the flexible board 11 and the conductor pattern 2b of the printed board 2 are soldered while the flexible board 11 is inserted into the square hole 2a of the printed board 2.

[Problems to be solved by the device]

However, in the conventional flexible board as described above, when the end portion of the flexible board 11 is inserted into the square hole 2a of the printed board 2, the bending portion and the jig are positioned and the bending portion is inserted into the square hole 2a. There was a problem that it was difficult to operate.

Also, when soldering is performed with the bent portion at the end of the flexible substrate 11 inserted in the square hole 2a of the printed circuit board 2, the bent portion may be displaced in the direction of the arrow β, so that the soldering work is performed. There was a problem that it was difficult.

The present invention is intended to solve the above problems, and facilitates positioning of the end of the flexible board and the jig and insertion of the bent end into the hole of the wiring board. An object of the present invention is to provide a flexible board that can facilitate the soldering work between the end portion of the flexible board and the wiring board.

[Means for Solving the Problems]

The flexible substrate according to the present invention comprises a conductor pattern formed on a flexible strip-shaped base film,
In a flexible substrate, the end portions of which are inserted into the holes of the wiring board in a bent state, and the end portions of which are formed with stopper protrusions that face each other when the end portion is bent, A retaining protrusion formed between the opposing stopper protrusions and protruding to the outside of the hole of the wiring board, and a guide hole formed at or near the center of the bent portion and into which a part of the jig is inserted. It is provided.

[Action]

According to the above means, since the guide hole is formed at or near the center of the bent portion of the end portion of the flexible substrate, by inserting a part of the jig into the guide hole, the end portion of the flexible substrate and the guide portion are fixed. The positioning with the tool becomes easy, and the work of inserting the bent portion into the hole of the wiring board becomes easy.

Further, in the above means, since the retaining protrusion is formed between the stopper protrusions facing each other, when the bent portion is inserted into the hole of the wiring substrate, the wiring substrate has the stopper protrusion and the retaining protrusion. Will be pinched by. Accordingly, the end of the flexible board is temporarily fixed to the wiring board, and the soldering work can be easily performed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an end portion of a flexible board according to an embodiment of the present invention, a printed board, and a jig, FIG. 2 is a plan view of the flexible board according to this embodiment, and FIG. FIG. 4 is a side sectional view showing a state in which the flexible board according to FIG. 3 is inserted into a square hole of a printed board, and FIG. 4 is a plan view showing a part of the flexible board of FIG.

In these figures, reference numeral 1 is a flexible substrate in which a conductor pattern 1f made of copper foil or the like is formed on a base film 1g made of a flexible polyimide resin or the like. A magnetic head H used in a cassette tape player or the like is attached to one end of the flexible substrate 1 (see FIGS. 2 to 3). The other end of the flexible board 1 is bent and inserted into the square hole 2a of the printed board 2 (see FIG. 1).

Reference numeral 1a denotes a pair of stopper projections formed at the tip of the other end of the flexible substrate 1, and 1c denotes the end when the end of the flexible substrate 1 is bent around a bending line 1b (see FIG. 2). A pair of stopper protrusions 1d provided at positions facing the pair of stopper protrusions 1a are a pair of retaining protrusions provided in a curved shape between the stopper protrusions 1a and 1c. As shown in FIG. 4, the distance B between the tips of the pair of retaining protrusions 1d and 1d is formed to be longer than the dimension A of the square hole 2a of the printed circuit board 2. Further, as shown in FIGS. 2 to 3, the distance L ₁ between the retaining projection 1d and the stopper projection 1a is formed to be substantially equal to the plate thickness L ₂ of the printed board 2.

Reference numeral 1e is a guide hole formed substantially at the center of the bent portion at the end of the flexible substrate 1. 1 and 3
As shown in the figure, the projecting piece 3a of the jig 3 is inserted into the guide hole 1e.

Further, in the present embodiment, the ends of the two conductor patterns 1f out of the five conductor patterns 1f are the other three conductor patterns 1f.
It is formed so as to be displaced from the end portion of f by a distance of δ in FIG. 2, whereby the end portions of the three conductor patterns 1f and the two conductor patterns 1f are printed as shown in FIG. The conductor pattern on the upper side and the conductor pattern on the lower side of the square hole 2a of the substrate 2 can be dealt with respectively.

Next, a mounting operation of the flexible board 1 according to the present embodiment on the printed board 2 will be described.

When mounting the flexible substrate 1 on the printed circuit board 2, first, the projecting piece 3a of the jig 3 is inserted into the guide hole 1e of the flexible substrate 1, and the end of the flexible substrate 1 is fixed to the jig 3
Bend it according to the shape of. Then, this bent portion is moved together with the jig 3 in the direction of arrow α in FIG. 1 and inserted into the square hole 2 a of the printed board 2. During the insertion operation, the retaining protrusion 1d comes into contact with the printed circuit board 2. However, since the base film 1g is flexible, the retaining protrusion 1d is curved inwardly of the square hole 2a. The side wall 2c of 2a slides in the direction of arrow α. Then, at the same time when the stopper protrusion 1d finishes sliding on the side wall 2c of the square hole 2a, the stopper protrusions 1a and 1c come into contact with the inner surface of the substrate 2, and the end portion of the flexible substrate 1 is further moved in the arrow α direction. Is prevented. As a result, the insertion amount of the bent portion into the square hole 2a is regulated within a predetermined amount. Further, at this time, since the retaining protrusion 1d is in contact with the printed board 2, the end portion of the flexible substrate 1 is prevented from coming off in the direction of arrow β in FIG. That is,
When the end of the flexible board 1 is inserted into the square hole 2a, the printed board 2 is sandwiched between the stopper projections 1a and 1c and the retaining projection 1d, so that the end of the flexible board 1 is printed. Is temporarily stopped by. Then, in this temporarily fixed state, the conductor pattern 1f at the end of the flexible substrate 1 and the conductor pattern 2b of the printed substrate 2 are soldered. Thereby, the flexible substrate 1
The printed circuit board 2 is fixed to the end of the conductor pattern 1f and the conductor patterns 1f and 2b are electrically connected.

As described above, according to this embodiment, since the guide hole 1e is formed at the center of the bent portion at the end of the flexible substrate 1, the jig 3 and the end of the flexible substrate 1 are positioned and bent. The work of inserting the printed board 2 into the square hole 2a becomes easy. Also, each stopper protrusion 1a and 1c
Since the drop-out preventing protrusion 1d is provided between the ends, when the end portion of the flexible substrate 1 is bent and inserted into the square hole 2a of the printed circuit board 2, the end portion is temporarily fixed to the printed circuit board 2. Then, the soldering work can be easily performed.

Further, in this embodiment, as described above, the five conductor patterns 1
Since the end portions of two conductor patterns 1f of f are formed so as to be displaced from the end portions of the other three conductor patterns 1f by the distance δ shown in FIG. 2, the end portions of all conductor patterns are formed. The space at the end of the flexible substrate 1 can be reduced as compared with the conventional example in which the parts are formed in one horizontal row.

〔effect〕

As described above, according to the present invention, since the guide hole is provided at the end of the flexible board, the end of the flexible board and the jig can be positioned and the end of the flexible board can be inserted into the hole of the wiring board. It will be easier. Further, since the retaining protrusion is provided at the end of the flexible substrate, the retaining substrate and the stopper protrusion sandwich the wiring substrate, so that the end of the flexible substrate is temporarily fixed to the wiring substrate. The attaching work can be performed easily.

[Brief description of drawings]

FIG. 1 is a perspective view showing an end portion of a flexible board according to an embodiment of the present invention, a printed board, and a jig, FIG. 2 is a plan view of the flexible board according to this embodiment, and FIG. FIG. 4 is a side sectional view showing a state in which the flexible board according to FIG. 4 is inserted into a square hole of a printed board, FIG. 4 is a plan view showing a part of the flexible board of FIG. 3, and FIG. FIG. 3 is a perspective view showing a printed circuit board to which the end portion is attached. 1 ... Flexible substrate, 1a, 1c ... Stopper protrusion, 1
d ... Retaining protrusion, 1e ... Guide hole, 1f ... Conductor pattern, 1g ... Base film, 2 ... Printed circuit board, 2a ...
Square hole.

Claims (1)

[Scope of utility model registration request] 1. A flexible strip-shaped base film on which a conductor pattern is formed, which is inserted into a hole of a wiring board in a state where its end is bent, and which is opposed to each other when bent at the end. In the flexible substrate on which the stopper protrusions are formed, a stopper protrusion formed between the stopper protrusions facing each other and protruding to the outside of the hole of the wiring substrate at the end, and the bent portion A flexible substrate having a guide hole formed at or near the center and into which a part of the jig is inserted.