JPS599417Y2 - tape recorder device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder device that prevents the tape from coming into contact with the erasing head except when the tape is running.

BACKGROUND ART Conventionally, in various tape recorders such as open decks and cassette decks, when the tape runs during recording and playback, apart from pauses, the erasing head and the tape are in contact with each other.

By the way, when a metal tape is used, a large current is passed through a coil wound around the core of the erasing head in order to improve the erasing efficiency of the tape.

This causes the erase head to overheat. Therefore, if the tape is in contact with the erasing head for a long time in this state, the tape may be destroyed by the heat from the erasing head.

The present invention was developed in view of the above points, and its purpose is to bring the tape into contact with the erasing head only when the tape is running during recording, playback, etc., so that the tape is destroyed by the heat generated by the erasing head. To provide a tape recorder device that prevents

An embodiment in which the present invention is applied to a cassette stick will be described below with reference to FIG.

1 is a tape whose both ends are wound around a feed roll 2 and a take-up roll 3, 4a and 4b are guide rollers for changing direction, 5 is a capstan, and 6 is capable of coming into contact with the capstan 5. It is a vinyl roller that runs the tape 1,
The Vinci roller 6 is rotatably pivoted to the other end of a lever 10, which has one end pivotally connected to a pose lever 7 with a pin 8a and a central portion pivotally connected to a frame 9 with a pin 8b. .

When the tape 1 is running during recording, playback, etc., the tape 1 is made to run by sandwiching the tape 1 and coming into contact with the capstan 5 by the vinyl roller 6, as shown by the imaginary lines.

11 has one end pivotally connected to the frame 12 and has a pose lever.
The lock lever 11 is spring-biased in one direction by a coil spring 13 so that an engagement pin 7a protruding from the lever 7 comes into contact with an inclined surface 11a. The matching pin 7a is in the engagement hole 1l
This is for locking the pause lever 7 by engaging with b.

14 is a recording/playback head fixed to the head mount 15 for recording or reproducing the tape 1; 16 is an erasing head 17 fixed to the head mount 15, and is mounted so as to be able to slide on the upper surface of the head mount 15; This head holding plate 16 is attached to the head mounting base 15 with a pin 18 at one end.
It is always biased in the direction of the tape 1 by a spring 19 whose one end is fixed to the interlocking rod part 16a which is pivoted on the upper surface of the tape 1 and extends to the other end.

20 is a pin that fixes the other end of the spring 19;
can freely slide within a sliding hole 15a formed in the head mounting base 15.

When the tape 1 is running, one end 10a of the lever 10 that pivots the vinyl roller 6 and the free end of the interlocking rod 16a of the head holding plate 16 are positioned with a gap T between them. However, they can come into contact with each other.

Reference numeral 15a denotes a stopper protruding from the head mounting base 15 in order to prevent the interlocking rod portion 16a from being pulled too much by the spring 19.

One embodiment of the present invention has the above-described structure, so that when the tape is not running, the pause lever 7 is pushed in against the elastic force of a spring built into the cassette deck body (not shown). As it goes, the retaining pin 7a touches the slope part 11a
By sliding the lock lever 11, the coil spring 1
pivots against the tensile force of 3.

The pose lever 7 is locked by the lock lever 11 by the engagement pin 7a engaging in the engagement hole 11b at the same time as the engagement pin 7a passes the slope portion 11a.

As the pause lever 7 moves backward, the other end of the lever 10, which has one end pivotally connected to the pause lever 7 and a middle portion pivotally connected to the frame 9, pivots about the pin 8b.

The vinci roller 5 is therefore separated from the capstan 6.

On the other hand, when the lever 10 pivots about the pin 8b as described above, the other end 10a of the lever 10 moves to the interlocking rod part 16.
a, and the head holding plate 16 pivots about the pin 18 as a fulcrum against the elastic force of the spring 19.

Then, the erasing head 17 fixed to the head holding plate 16 is separated from the tape 1.

Therefore, in order to increase the erasing efficiency of the tape during recording, by passing a large current through the erasing head 17, even if the erasing head 17 is overheated, the tape 1 is kept away from the erasing head 17, thereby preventing the tape 1 from being destroyed by heat. be done.

When recording or playing, if the pause lever 7 locked to the lock lever 11 is further pushed in, the lock lever 11 is always pulled in one direction by the coil spring 13, so the lock lever 11 moves against the upper surface of the engagement pin 7a. ride on.

Accordingly, the pose lever 7 is disengaged from the lock lever 11 and returns to the original position shown by the imaginary line by the restoring force of a spring (not shown) built into the cassette lock body.

Following the return of the pose lever 7, the lever 10 that locks the vinch roller 6 also returns to its original position using the pin 8b as a fulcrum.

Furthermore, the head holding plate 16 to which the erasing head 17 is fixed also pivots to the old position (the position shown by the imaginary line) using the pin 18 as a fulcrum due to the tensile action of the spring 19, so that the erasing head 17 comes into contact with the tape 1. do.

In this state, the recording or playback state is entered for the first time.

As mentioned above, in the present invention, the recording/playback head is fixed to the head mount, and the erasing head is individually fixed to the head holding plate, which has one end pivoted to the head mount and is constantly biased by a spring in the tape direction. Moreover, since the vinyl roller is attached to a lever that is linked to the pause lever, and the tip of the lever is engaged with the head holding plate, recording,
The tape erasing head can be contacted only when the tape is running during playback, and when paused, the Vinci roller and erasing head can be separated from the tape by pressing the pause lever, which prevents the erasing head from contacting the tape for a long time. can be eliminated.

Therefore, damage to the tape due to heat generated by the erasing head can be prevented.

Moreover, the head holding plate to which the erasing head is attached is
By locking the interlocking rod to the tip of the lever to which the Vinci roller is attached, the movement from the pause lever can be directly received, so the lever operation is light and the movement stroke is short, allowing for precise movement. Furthermore, since the erasing head and the vinch roller contact the tape surface at right angles, the erasing efficiency of the erasing head and the driving force of the vinch roller and the tape are improved.

[Brief explanation of the drawing]

The drawing is a plan view showing an embodiment of the present invention.

Claims (1)

[Scope of utility model registration request] A recording/playback head fixed to a head mounting base, an erasing head fixed to a head holding plate which is always spring-biased in the direction of the magnetic tape and having one end pivoted to the head mounting base, and one end pivoted to a pause lever. and a vinci roller attached to a lever such that the lever is rotated by pushing at least the pause lever while holding the recording/playback head at the recording/playback position when pausing during recording operation. A tape recorder device, characterized in that the erasing head and the Vinci roller are separated from the magnetic tape by rotating the head holding plate engaged with the leading end.