JPH0628087B2 - Azimuth angle adjustment device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a multi-stage recording / reproducing apparatus in which a plurality of cassette tapes are stacked and used, and the azimuth of the recording / reproducing apparatus is capable of reciprocating traveling (reverse turn). The present invention relates to an angle adjusting device.

BACKGROUND OF THE INVENTION Conventionally, a tape recorder for recording / reproducing by running two tapes at the same time or separately for dubbing has a structure in which cassette halves are arranged in a plane. Since it was necessary to provide the magnetic heads independently of each other, an azimuth adjusting mechanism for each magnetic head was required separately, which took a large space.

In order to overcome such a drawback, the present applicant has developed a tape recorder in which cassette halves are arranged in parallel and in multiple stages. Such a multi-stage tape recorder has an advantage that the mechanical portion can be extremely compacted, but the azimuth adjusting mechanism of the magnetic head is also compact in accordance with such compactness, and the work is easy. It is desirable that the mechanism be easy and that the device be as inexpensive as possible.

It is an object of the present invention to facilitate the azimuth angle adjusting work in an azimuth angle adjusting device for a multi-stage magnetic head such as the above-mentioned multi-stage cassette tape recorder, reduce the cost, and make the device compact.

Constitution of the invention The main means adopted by the present invention to achieve the above-mentioned object is that the above-mentioned recording tape faces the respective recording tapes housed in the cassette halves arranged in parallel and in multiple stages. In a device for adjusting the azimuth angle of two magnetic heads rotatably arranged about a rotation axis substantially perpendicular to each other, a member for forming a contact portion on each of the magnetic heads and supporting each magnetic head. On one side, an azimuth adjusting screw for adjusting the azimuth angle of each magnetic head is attached in one direction by abutting against the hitting portion at the forward position and the reverse position, and the mounting position of the azimuth adjusting screw is shifted for each magnetic head. It is an azimuth adjustment device concerning a point.

The present invention can be applied not only to the tape recorder shown in the following embodiments but also to an azimuth angle adjusting device such as a video tape recorder.

Examples Next, examples embodying the present invention will be described to provide an understanding of the present invention.

1 is an exploded perspective view of an azimuth angle adjusting device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a view taken in the direction of arrow B in FIG. 4 is a view taken in the direction of arrow C in FIG. 1, and FIG. 5 is a view corresponding to FIG. 4 showing a state in which the magnetic head in FIG. 4 is rotated 180 degrees.

The following examples are merely specific examples of the present invention, and do not limit the technical scope of the present invention.

In this embodiment, as shown in FIG.
The present invention relates to a tape recorder in which 1 is fixed in a holding means (not shown) in a state of being parallel and stacked in two stages.

1a and 1a shown in FIG. 1 are magnetic tapes housed in the cassette halves, respectively. These magnetic tapes 1a respectively face two magnetic heads 2 and 3 which are adjacently provided in parallel as shown in the drawing, and contact the magnetic heads 2 or 3 by a guide mechanism (not shown) during recording and reproduction. Contacted.

Each of the magnetic heads 2 and 3 integrally has rotating shafts 2a and 3a, which are substantially perpendicular to the magnetic tape 1a facing each other.

The rotating shafts 2a and 3a are rotatably supported by bearings 4e and 4f fixed in parallel to the head base 4, respectively.

Further, gears 8 and 6 having the same diameter are provided at end portions 2b and 3b of the rotary shafts 2a and 3a opposite to the magnetic heads 2 and 3.
Is press-fitted and fixed.

The both gears 6 and 8 mesh with a connecting gear 7 rotatably fitted to a shaft 4g fixed to the head base 4.

Further, a switching lever 5 rotatably attached to an indicator fulcrum pin 4h fixed to the head base 4 in parallel with the shaft 4g.
The gear portion 5b of the above meshes with the gear portion 6. Therefore, when the switching lever 5 is rotated around the fulcrum pin 4h, the gears 6 and 8 rotate via the connecting gear 7 in the same direction by the same angle.

The gears 6, 7 and 8 have a large backlash and are engaged with each other with appropriate play so that the azimuth angle can be adjusted appropriately.

Further, spring hooking pins 8b and 6b are planted on the side surfaces of the gears 8 and 6, respectively.

In the arm portion 4k integrally formed with the head base 4,
The spring hooking holes 4i and 4j correspond to the bearings 4e and 4f.
And the tension spring 9 is provided between the spring hooking hole 4i and the spring hooking pin 8b.
However, tension springs 10 are respectively stretched between the spring hooking holes 4j and the spring hooking pins 6b to press the teeth of the gear 8 against the teeth of the gear 7 and the teeth of the gear 6 against the teeth of the gear 7. ing.

On the other hand, the upper arm portion 1 that horizontally projects from the upper end portion of the head base 4 that integrally has the bearings 4e and 4f.
Screw holes 4a and 4b are formed at a tip portion of the tape 1 at regular intervals in the longitudinal direction of the tape 1a, and the screw holes 4a and 4b are provided with compression springs 15 as shown in FIGS. An FWD (forward) azimuth screw 11 and a REV (reverse) azimuth screw 12 are hinged in the same direction.

Further, at a position below the arm portion 16, the lower arm portions 17 and 17 respectively project in the same direction as the upper arm portion 16, and screw holes 4c and 4d parallel to the screw holes 4a and 4b are provided at respective end portions thereof. Has been formed.

FWD (forward) azimuth screws 13 and REV that are parallel to the azimuth screws 11 and 12 and face the same direction via compression springs 15 in the screw holes 4c and 4d.
The (reverse) azimuth screws 14 are respectively screwed.

Further, the magnetic heads 2 and 3 have contact portions 2e and 3e.
Are integrally formed. The distance from the axis of the rotating shafts 2a and 3a of the contact portions 2e and 3e is, for example, on the magnetic head 2 side, when the magnetic head 2 is in the forward position as shown in FIGS. 1 and 4. , Hit part 2
When one end 2c of the contact e contacts the lower end of the azimuth screw 11 and the magnetic head 2 is rotated 180 degrees to set to the reverse position as shown in FIG.
Are arranged at such a distance that they contact the lower end of the azimuth screw 12.

The same applies to the contact portion 3e of the other magnetic head 3, and one end 3e of the contact portion 3e contacts the lower end of the azimuth screw 13 at the forward position, and
The other end 3d is set in a positional relationship such that it abuts on the lower end of the azimuth screw 14.

Further, the azimuth screws 11 and 12 as described above are attached at the same position as seen in the axial direction of the rotating shaft 2a as shown in FIG. 2, and the other azimuth screws 13 and 14 are attached to the rotating shaft 13 respectively.
The azimuth screws 13 (14) are attached to the same position as seen in the axial direction of the azimuth screws 13 (14) with respect to the azimuth screws 11 (12) so that the azimuth screws can be easily rotationally adjusted from one direction by a driver. It is attached at a position shifted in the axial direction of (3a).

Therefore, in the above configuration, the screwing amount of the four azimuth screws can be adjusted by inserting the driver from one direction, and by adjusting the advancing amounts of these azimuth screws 11 to 14, The contact position with the contact portions 2e or 3e is adjusted, and the azimuth angles of the magnetic heads 2 and 3 integrated with the contact portions 2e and 3e are adjusted.

Then, as shown in FIG. 4, when the magnetic tape 1a travels in the forward direction indicated by the arrow, the switching lever 5 is moved to the fourth position.
As shown in the figure, rotate clockwise as much as possible. Correspondingly, the gears 6 and 8 rotate counterclockwise, but the rotation of the gears 6 and 8 is integrated with the gears 6 and 8 via the rotation shafts 3a and 3b. And 2e come into contact with the lower ends of the azimuth screws 13 and 11 whose entrance and exit amounts are adjusted, respectively, so that the azimuth angles are limited to proper azimuth angles.

As described above, since there is a considerably large backlash between the gears 6, 7 and 8, even if the turning positions of both gears are set to some extent by the switching lever 5, it is equivalent to backlash in each gear. The gears 6 and 8 are independently rotatable by the amount of play to be performed, and are rotated by the tension springs 10 and 9 until the contact portions 3e and 2e contact the lower ends of the azimuth screws 13 and 11. .

On the contrary, when the tape 1a travels in the reverse direction shown by the arrow as shown in FIG. 5, the switching lever 5 is maximally rotated counterclockwise as shown in FIG.
Is rotated until the abutting portions 3e and 3e come into contact with the lower ends of the azimuth screws 14 and 12, respectively, by the force of the tension springs 10 and 9, and fixed at that position. Azimuth bis 12
Since each of the magnetic heads 3 and 14 is fixed at a position advanced by an appropriate amount, the azimuth angle of the magnetic heads 3 and 2 at the reverse position is appropriately maintained.

Effect of the Invention As described above, the present invention faces each recording tape accommodated in the cassette halves arranged in parallel and in multiple stages,
In the device for adjusting the azimuth angle of two magnetic heads rotatably arranged around a rotation axis substantially perpendicular to the recording tape, contact portions are formed on both magnetic heads, and each magnetic head is Attach the azimuth adjusting screw that adjusts the azimuth angle of each magnetic head in one direction by abutting the contact portion at the forward position and the reverse position on the supporting member side, and further attach the azimuth adjusting screw to each magnetic head. Since the azimuth angle adjusting device is characterized by being shifted, it is possible to easily and independently adjust the azimuth angle of the magnetic heads with respect to the recording tapes stacked in multiple stages, and the mechanism is simple and integrated. Therefore, the device can be inexpensive and compact.

[Brief description of drawings]

1 is an exploded perspective view of an azimuth adjusting device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a view taken in the direction of arrow B in FIG. 1, and FIG. C in FIG.
FIG. 5 is a view corresponding to FIG. 4 showing a state in which the magnetic head in FIG. 4 is rotated 180 degrees. Explanation of reference numerals 1 ... Cassette half, 1a ... Magnetic tape 2, 3 ... Magnetic heads 2a, 3a ... Rotating shafts 2e, 3e ... Contact portion, 4 ... Head base 4a-4d ... Screw holes 4e , 4f ...... Bearing part 4g ...... Shaft 4h ...... Support pin 4i, 4j ...... Spring mounting hole 4k ...... Arm part 5 ...... Switching lever 5b ...... Gear part, 6, 8 ...... Gear 7 ...... Connection gears 6b, 8b ... Spring hooks 9,10 ... Tension springs 11-14 ... Azimuth screw 15 ... Compression spring, 16 ... Upper arm part 17 ... Lower arm part.

Claims (1)

[Claims] 1. A rotary unit arranged so as to be rotatable about an axis of a rotary shaft substantially perpendicular to the recording tapes, facing the respective recording tapes housed in cassette halves arranged in parallel and in multiple stages. In a device for adjusting the azimuth angle of each magnetic head, each magnetic head is provided with a contact portion, and each magnetic head is supported by contacting the contact portion at the forward position and the reverse position with each other. An azimuth angle adjusting device characterized in that an azimuth adjusting screw for adjusting an azimuth angle of a magnetic head is attached in one direction, and further, the mounting position of the azimuth adjusting screw is shifted for each magnetic head.