JPS6141126Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an azimuth switching mechanism in a magnetic recording/reproducing apparatus such as a reversible reverse tape recorder, reverse stereo deck, data recorder, or the like.

Conventionally, the azimuth of the head relative to the tape is changed according to the tape of a tape recorder running in the forward or reverse direction during recording or playback, and the azimuth after the movement is changed by moving the head body. There was one that flipped the head against the tape. However, the former method has the disadvantage that when the head is moved, it is difficult to maintain the positional accuracy of the head itself, and stress is added to the output lead of the head.

In addition, in the latter case, by reversing the head, the azimuth is adjusted at the same time as the tape runs in the forward or reverse direction, so the change in the running system during reversal causes the effect of azimuth loss after reversal. It had the disadvantage of becoming stronger.

The present invention was developed in view of the above-mentioned points, and one of its objectives is to ensure that even when a recording medium such as a tape is reversed in the forward or reverse direction, it can be used in the same way as when it was used in the forward direction. To provide an azimuth switching mechanism in a magnetic recording/reproducing device which improves the positional accuracy of the head relative to the tape and prevents stress from being applied to the head output lead by making it possible to switch only the azimuth of the head.

Another object of the present invention is to provide an azimuth switching mechanism in a magnetic recording and reproducing device which is suitable not only for recording or reproducing other tracks on the tape but also for recording or reproducing the same track in the reverse direction by making it possible to switch only the azimuth of the same head used in the forward direction, even when the recording medium such as a tape is reversed in the forward or reverse direction, as described above.

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

1 is a head fixed to a head mounting plate 2, and T is a tape. The head mounting plate 2 is rotatably attached to the head stand 5 by inserting a screw 4 into a cutout hole 3 formed on one side thereof, and the mounting plate 2 is attached to the head stand 5 on the other side of the head mounting plate 2. A mounting angle 7 for supporting a spring 8 for pressing on the side is fixed to the head stand 5. Reference numerals 8 and 9 indicate a head presser spring and an azimuth adjustment spring for forward travel, which are wound around the outer periphery of the azimuth adjustment screw 6 for forward travel, with the head mounting plate 2 as a boundary, and 10 is an azimuth adjustment spring for forward travel. It is a substantially pentagonal azimuth regulating table into which the threaded portion of the screw 6 is screwed, and has a substantially inverted chevron-shaped fulcrum lower edge 10a at the substantially center of the lower surface, and this azimuth regulating table 10 is in line contact with the upper surface of the head table 5. The fulcrum lower edge 10a is in line contact with the upper surface of a substantially pentagonal movable azimuth regulating table 11 having a fulcrum lower edge 11a having a substantially inverted chevron shape. Movable azimuth regulation table 1
Reference numeral 1 is disposed so that it can see-saw and slide by having a lower fulcrum edge 11a in line contact with the lower surface of the head mounting plate 2, and an azimuth regulating spring 12 for running in the opposite direction is provided on one side of the lower surface. is interposed between the head stand 5 and always exerts an upward spring force, and an azimuth adjustment screw 13 (to be described later) is screwed into the other side, and its tip abuts against the head stand 5. It is supported in points. And movable azimuth regulation table 1
1 can be moved on the upper surface of the head stand 5 as the tape T runs in the forward or reverse direction, for example, by operating a push button (not shown) during recording or playback.

Reference numeral 13 denotes an azimuth adjusting screw for reverse direction travel, which is screwed into one side of the movable azimuth regulating table 11 so that its tip comes into contact with the upper surface of the head table 5.

Since the present invention is constructed as described above, the tape T is directed in the forward direction, that is, in the direction indicated by the arrow X in FIG.
To adjust the azimuth when the tape T runs in the forward direction, the azimuth of the head 1 is adjusted by rotating the azimuth adjustment screw 6 for forward running. That is, the azimuth adjustment for forward running is performed in a state in which the lower fulcrum edge 10a of the azimuth regulation base 10 is located directly below the lower fulcrum edge 11a of the movable azimuth regulation base 11 (see FIGS. 2 and 3). When the screw 6 is screwed back, the lower edge 10a of the fulcrum of the azimuth regulation base is in contact with the upper surface of the movable azimuth regulation base 11, and the spring force of the azimuth adjustment spring 9 is stronger than that of the head presser spring 8. Since the azimuth adjustment spring 9 for forward travel is further extended, the other side of the head mounting plate 2 is lifted up from the head stand 5.

On the other hand, when the azimuth adjustment screw 6 for forward running is screwed in, the other side of the head mounting plate 2 is pressed against the elastic force of the head presser spring 8 and lowered with respect to the head stand 5. In this way, the forward azimuth can be adjusted.

Next, in order to adjust the azimuth when the tape T runs in the opposite direction, that is, in the direction of arrow Y in FIG.
1 in the arrow X (forward direction) while being elastically held by the elastic force of the azimuth regulation spring 12, the axis of the azimuth adjustment screw 13 for traveling in the reverse direction is moved to the lower edge of the fulcrum of the azimuth regulation base 10. 10a so that it substantially coincides with the axis of 10a.

In this state, when the azimuth adjustment screw 13 for reverse direction travel is rotated and screwed forward or backward, the fulcrum lower edge 11 of the movable azimuth regulation base 11
The movable azimuth regulating table 11 is moved in a see-saw manner while receiving the elastic force of the azimuth regulating spring 12 with a as a fulcrum, and the azimuth can be switched when traveling in the opposite direction. (See Figure 4.) Then, when the tape T runs in the forward direction again,
As shown in FIG.
It moves in the opposite direction on the head stand 5 while being held by the elastic force of 2 and prevented from tilting. In this way, the lower fulcrum edge 10a of the azimuth regulating base 10 overlaps the axis of the lower fulcrum edge 11a of the movable azimuth regulating base 11, and the azimuth regulating base 10 and the movable azimuth are substantially similar to the case shown in FIG. Since the height of the regulation base 11 from the head base 5 is approximately the maximum width, one side of the head mounting base 2 is raised or lowered from the head base 5 by rotating the azimuth adjustment screw 6 for forward travel. Adjust the azimuth accordingly.

As mentioned above, with this invention, even when a recording medium such as a tape is reversed in the forward or reverse direction, only the azimuth of the same head used in the forward direction can be switched, so it is easier to handle the tape than with conventional products. The positional accuracy of the head is improved, and stress on the head output lead can be prevented compared to conventional products in which the head is switched by moving. Moreover, it can be applied not only to recording or reproducing on other tracks of a tape, but also to recording or reproducing the same track in reverse.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the azimuth switching mechanism of the present invention, Fig. 2 is a rear view, and Fig. 3 is for explaining the state in which the azimuth is switched when the tape runs in the forward direction. Figure 4 is a rear view for explaining how to switch the azimuth when the tape runs in the opposite direction, and Figure 5 shows how to switch the azimuth when the tape runs in the forward direction again. FIG. 1... Head, 2... Head mounting plate, 4... Screw, 5... Head mounting base, 6... Forward azimuth adjustment screw, 8... Head presser spring, 9... Azimuth for forward direction travel. Adjustment spring, 10... Azimuth regulation base, 10a... Lower edge of fulcrum, 11... Movable azimuth regulation base, 11a... Lower edge of fulcrum, 13...
Azimuth adjustment screw in the opposite direction.

Claims (1)

[Scope of utility model registration request] One side of the head mounting plate is attached to the head stand, and the other side is provided with a movable azimuth regulating stand that is movable on the upper surface of the head stand as the tape runs in the forward or reverse direction. The movable azimuth regulating table has a substantially inverted chevron-shaped fulcrum lower edge located on the lower surface of the center in contact with the upper surface of the head table, and has an azimuth regulating table for reverse direction travel between it and the head table on one side. By interposing a spring and screwing an azimuth adjustment screw for running in the opposite direction on the other side, the head stand is supported at three points so as to be able to see-saw,
The lower edge of the substantially inverted chevron-shaped fulcrum of the azimuth regulation table is placed on the upper surface of the movable azimuth regulation table, and the tip of the azimuth adjustment screw for forward travel, which is rotatably inserted into the head mounting plate, is connected to the azimuth regulation table. and a spring for holding down the head and an azimuth adjustment spring for forward travel are wound around the outer periphery of the azimuth adjustment screw for forward travel, respectively, with the head mounting plate as a boundary. Azimuth switching mechanism in playback equipment.