JPS637942Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for an erase head, and more particularly to a mounting device for an erase head that uses a permanent magnet.

Conventionally, tape recorders that generally use a permanent magnet as an erasing head have a rotatable erasing head mounting member 8' on a head base 1', as shown in Figure 1, in order to prevent the erasing head from coming into contact with the magnetic tape during playback. A coil spring 8'' is stretched between the erasing head mounting member 8' and the head base 1'. 14' is kept at the rear without moving forward against the tension of the coil spring 8'', and when recording operation is performed, it moves to the playback position by following the advance of the head base 1' by the tension of the coil spring 8''. death,
It was for erasing work.

However, since the conventional tape recorder uses a coil spring 8'', there are drawbacks such as not only complicated installation work but also difficult management, which is one of the causes of high costs. Ta.

The present invention has been developed in view of the above points, and the above-mentioned drawbacks are solved by integrally molding the base portion to which the erasing head is attached and the spring piece to be biased from synthetic resin.

That is, an embodiment of the present invention will be described using FIGS. 2 to 4. Reference numeral 1 denotes a head base. Although not particularly shown, a magnetic tape for recording/reproducing, a pinch roller, etc. are mounted on the head base 1, and the head base 1 can be moved between a stop position and a recording/reproducing position. Further, the head base 1 is provided with a locking hole 2, a mounting shaft 3, a locking pin 4, and a guide hole 5. Reference numeral 6 denotes a tape guide plate made of synthetic resin, and locking legs 7, 7 provided on the tape guide plate 6 are locked in the locking holes 2 of the head base 1, so that the tape guide plate 6 is mounted on the head base 1. It is. Reference numeral 8 denotes an erasing head mounting member made of synthetic resin, and the erasing head mounting member 8 includes a base 9 on which the erasing head 14 is mounted and a spring piece 10 for biasing the erasing head 14 in the direction of contacting the magnetic tape. It is molded into. An arm portion 1 for attaching an erasing head 14 is provided at one end of the base portion 9.
1, 11 and a positioning protrusion 12 are provided, and the other end is provided with a hole 13 to be attached to a mounting shaft 3 provided on the head base 1. The erasing head 14 made of a permanent magnet has a hole 15 approximately in the center thereof.
is provided, and the hole 15 engages with the protrusion 12. To attach the erasing head 14 to the erasing head mounting member 8, the arms 11, 11 are pushed outward from above the base 9, and the holes 15 and the protrusions 12 are engaged. 11 returns to its original position due to its own elasticity, and the erasing head 14 can be attached.

Reference numeral 16 denotes an operating pin that moves with the recording operation. The operating pin 16 protrudes from the guide hole 5 provided in the head base 1 and engages with the erasing head mounting member 8.

Next, to explain how to attach the erasing head attachment member 8, the hole 13 of the base 9 is engaged with the attachment shaft 3 provided on the head base 1, the locking screw 3b is fitted into the hole 3a of the attachment shaft 3, and the spring is attached. It is only necessary to lock the free end of the piece 10 to the locking pin 4.

When a playback operation is performed as shown in FIG. 3, the head base 1 moves forward to move the magnetic head and pinch roller to the playback position, but the erase head 1
4 does not move forward because the operating pin 16 does not move. Furthermore, as shown in FIG. 4, when a recording operation is performed, the head base 1 and the operating pin 16 move, so the erasing head mounting member 8 follows the head base 1 due to the biasing force of the spring piece 10, and the erasing head 14 is magnetically moved. It comes into contact with the tape and performs the erasing operation.

As mentioned above, in the present invention, the erasing head mounting member 8, which consists of the base 9 on which the erasing head 14 is attached and the spring piece 10 for biasing the erasing head 14 in the direction of contacting the magnetic tape, is integrally molded from synthetic resin. However, since the base 9 is rotatably attached to the head base 1 and the spring piece 10 is locked to the head base 1, it can be handled as one component, and the work of attaching a coil spring as in the conventional case can be omitted. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional example, FIGS. 2 to 4 show an embodiment of the present invention, and FIG. 2 is an exploded perspective view.
FIG. 3 is a plan view showing the reproduction state, and FIG. 4 is a plan view showing the recording state. DESCRIPTION OF SYMBOLS 1... Head base, 3... Mounting shaft, 4... Locking pin, 8... Erasing head mounting member, 9... Base, 10... Spring piece, 14... Erasing head.

Claims (1)

[Scope of utility model registration request] An erasing head mounting member consisting of a base for mounting the erasing head and a spring piece for biasing the erasing head in the direction of contact with the magnetic tape is integrally molded from synthetic resin, and the base is rotatable relative to the head base. 1. A mounting device for an erasing head, characterized in that the spring piece is locked to a head base at the same time as the head is mounted.