JPS639844Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection device for connecting a shielded wire to a magnetic head fixed on a head plate which movably holds the head relative to the tape.

In a conventional tape recorder, a movably held head on a head plate moves backwards from the tape during fast forwarding, rewinding, and stopping, and moves forward and comes into contact with the tape during playback and recording. Shielded wires were used for wiring from this head to circuits such as the first stage amplifier, but this caused various problems. One of the problems is that thin shield wires were used, and during low-temperature operation tests, the wires became hard, making it difficult to move the head plate and other mechanical parts. In addition, since the shielded wire is thin, the terminal of the soldered part becomes thin and may break when the tape recorder is repeatedly operated such as playing, fast forwarding, rewinding, and stopping. In particular, tape recorders capable of two-way playback require twice as many shielded wires as those for one-way playback, so such a phenomenon is particularly likely to occur.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide smooth movement of the head plate in a tape recorder capable of two-way playback, connection between the head and the circuit section without any accidental disconnection, and connection of the terminal group of the head. An object of the present invention is to provide a magnetic head connection device that is free from miswiring.

The present invention will be explained in detail below with reference to an embodiment shown in the drawings.

FIG. 1 shows a single flexible board connected between a magnetic head and a two-way regeneration switch, and FIG. 2 is a plan view showing its mounting state.

In FIG. 1, one end of a flexible substrate 1 is provided with branch parts 3 and 4 branched by a groove 2, and the other end thereof is provided with a fixed part 5 to which a two-way regeneration selector switch and a shield wire are connected. It is equipped with
A circuit pattern 6 is formed in advance on the flexible substrate 1 constructed in this way so that reproduction states in two directions can be obtained by connection with a magnetic head and a changeover switch. Note that 7 and 8 are ground patterns.

To mount the flexible board 1 constructed in this way, first bend the branch parts 3 and 4 at right angles as shown in FIG. Insert and solder. Next, the flexible board 1 and the two-way regeneration selector switch 1
Solder 1 pin 12. Incidentally, the branch parts 3 and 4 and the fixed part 5 of the flexible substrate 1 are provided with holes in advance into which the terminal group 10 of the head 9 and the pin 12 of the changeover switch 11 are inserted. Further, shielded wires 13 and 14 soldered to the fixed portion 5 of the flexible substrate 1 are connected to a circuit portion such as a first stage amplifier. Note that the ground patterns 7 and 8 of the flexible substrate are located at the center of each channel to provide a shielding effect.

As explained in detail above, according to the present invention, by using a robust flexible board as the wiring material, the wiring will not break even during low-frequency operation, and the flexible board is flexible even at low temperatures. The head plate can be moved smoothly, and since the shield wire is soldered to the fixed part of the flexible keyboard, it will not break.
In addition, when connecting to the head and switch with a flexible board in the middle, the terminal groups of the head and switch are positioned in advance by pattern printing, so there is no possibility of incorrect wiring. Since the grooves are provided and a plurality of branch portions are provided, it is possible to connect multiple boards to one electronic component, and the functions of applicable products based on this can be greatly expanded.

Specifically, (1) A tape recorder capable of two-way playback requires a large number of wires to connect the head and switch, but the present invention is suitable because it does not take up much space.

(2) The movement of the head mounting plate is improved even at low temperatures.

(3) By using a flexible board, the pattern is determined by the mold, so there is no wiring error.

(4) Since the flexible circuit board is doubled and soldered (installation states 3 and 4 in Figure 2), it does not take up space at the rear of the head, making it easier to move at low temperatures.

(5) Since the L channel and R channel can be divided into different patterns, separation between the channels can be improved.

As described above, the present invention can significantly reduce the failure rate when using a tape recorder, and improve the work efficiency during manufacturing, and is truly practical.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of a flexible board used in the present invention, and FIG. 2 is a plan view showing the state in which the magnetic head connection device of the present invention is mounted. 1: Flexible board, 2: Groove, 3, 4: Branch portion, 5: Fixed portion, 6: Circuit pattern, 9: Magnetic head, 11: 2-way playback switch, 13, 1
4: Shield wire.

Claims (1)

[Scope of utility model registration request] A group of terminals of a magnetic head fixed on a movably held head plate is attached to one end of a flexible substrate with a pattern printed thereon so as to obtain a two-way playback state by means of a groove. The two branched parts are overlapped and connected, and a shielded wire to a circuit part such as a first-stage amplifier is soldered to the fixed part on the other end side of the flexible board, and the two branches are connected to the other end.
A magnetic head connection device characterized in that the pin of a direction regeneration changeover switch is soldered.