JPS6220898Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head azimuth adjustment and gap orientation adjustment mechanism capable of adjusting the azimuth and direction of the magnetic head.

Conventionally, as an azimuth adjustment mechanism for a magnetic head, there is one shown in FIGS. 1 and 2. That is, one side of the head mounting plate 1' to which the head is fixed is screwed to the head base 3 via the collar 4' with screws 5.
Moreover, the other side of the head mounting plate 1' is screwed to the head base 3 via an azimuth adjustment spring 20 using an azimuth adjustment screw 7'. The azimuth of the head 2 is adjusted by screwing in and out the azimuth adjusting screw 7' against the elastic force of the azimuth adjusting spring 20. Moreover, there is a device shown in FIG. 3 that adjusts the gap direction of the magnetic head. That is, head 2
Connect the head mounting plate 1″ to which the two component plates 1″ are fixed.
Divided into A and 1″B, each component board 1″A,
Attach one side of the head base 1"B to the head base 3 in the manner shown in FIGS. 1 and 2, and attach the component plates 1"A,
1''B are stacked on top of each other, and screws 22 are inserted into the elongated holes 21 of the upper component plate 1''A to create other configurations for the component plate 1''A. This is the one with plate 1″B attached. Then, the direction of the gap of the head 2 is adjusted by loosening the screw 22 and moving one component piece 1''A to the other component piece 1''B.

As described above, the conventional head azimuth adjustment mechanism requires an azimuth adjustment spring 20 as shown in FIGS. 1 and 2, which increases the cost due to the increased number of parts. In addition, in the head orientation adjustment mechanism shown in Fig. 3, the head mounting plate 1'' itself requires two component plates 1''A and 1''B, and these component plates 1''A and 1''B are attached to each other. However, since the elongated hole 21 and screw 22 are required, the number of parts increases, the installation work is time-consuming, and the cost is high. If the screws 22 that attach component plates 1''A and 1''B to each other become loose during adjustment, component plate 1''A may move and the head orientation may change unexpectedly. In order to make the adjustment, it is necessary to operate the screw 22 provided at a position apart from the azimuth adjustment screw 7'', which has the disadvantage that the adjustment work is time-consuming and increases the cost.

The present invention was developed in view of the above-mentioned points, and its purpose is to reduce the number of parts and the labor of installation by eliminating the need for an azimuth adjustment spring, thereby reducing costs.
Moreover, it is an object of the present invention to provide an azimuth adjustment and gap orientation adjustment mechanism for a magnetic head that allows the head orientation to be adjusted simply by rotating a special collar mounted coaxially with the azimuth adjustment screw.

The present invention will be described below with reference to an embodiment shown in FIGS. 4 to 9.

Reference numeral 1 denotes a head mounting plate made of a spring material such as a spring copper plate or plastics, and having a head 2 fixed on its upper surface. By bending it, a bent portion 1a is formed, and a tooth portion 1b with which a gear 6c ₁ (described later) is meshed is formed on the other side. 3 is a head base to which the head mounting plate 1 is attached. To attach the head mounting plate 1 to the head base 3, a bent part 1a formed at an arbitrary angle on one side of the head mounting plate 3 is fixed with a screw 5 through a collar 4 so that it can rotate freely in the horizontal direction. However, since the other side of the head mounting plate 2 is located above the horizontal position, it has a spring force against external forces from above.

Reference numeral 6 denotes a special collar made of metal or plastic, and this special collar 6 is attached to the head base 3 by inserting an azimuth adjustment screw 7 into a screw hole 6a provided at the center thereof. The special collar 6 is a small-diameter cylindrical portion with a swollen head 6b that presses down the head mounting plate 1 on the upper side, and a gear 6c ₁ on the outer periphery below which is meshed with the mesh portion 1b of the head mounting plate 1. 6c is formed. _6b1 is a slit formed in the diametrical direction on the upper surface of the expanded head 6b, and this slit _6b1 is inserted into the gear wheel 6c1 by inserting the driver 8 and rotating the special collar 6 around the azimuth adjustment screw _7. The head mounting plate 1 is rotated about the screw 5 through the engaged meshing body parts 1b to adjust the direction of the gap. In addition, in this embodiment, when adjusting the gear direction, a gear 6c ₁ is provided on the outer periphery of the small diameter cylindrical portion 6c of the special collar 6, and the gear 6c ₁ is meshed with the mesh portion 1b of the head mounting plate 1. Accordingly, the gear direction is adjusted by rotating the special collar 6 around the screw 5 of the head mounting plate 1, but the means for engaging the special collar 6 with the head mounting plate 1 is the gear _6c1 and the meshing body. Instead of using the portion 1b, this can be done, for example, by using a protrusion and a recess (not shown) into which the protrusion is engaged. _6b2 is a slit formed on the outer periphery of the enlarged head 6b at a position perpendicular to the slit 6b and coaxially with the azimuth adjustment screw 7;
b ₂ is intended to prevent the gear direction from being changed accidentally by restricting the rotation of the collar 6 when the azimuth adjustment screw 7 is turned by fitting the fixing jig 9 when adjusting the azimuth. be. The fixing jig 9 is fitted into the head base 3 or directly inserted into a chassis (not shown) at the bottom of the head base 3, so that it can be detachably attached. A felt 10 is fixed to the upper surface of the other side of the head mounting plate 1 which is pressed down to the lower surface of the expanded head 6b of the special collar 6, and this felt 10 is fixed to the head mounting plate 1 by screws 7. This is to buffer the head 2 from vertically vibrating due to external vibrations. 1
1 is a coil spring interposed between the lower surface of the small diameter cylindrical portion 6c of the special collar 6 and the head base 3;
This coil spring 11 is used as necessary to prevent the special collar 6 from being reversed. Reference numeral 12 designates a coil spring that applies a tensile force to the head mounting plate 1 in order to prevent the head mounting plate 1 from vibrating in the gap direction due to the reverse rotation of the special collar 6.

Since one embodiment of the present invention has the above-described configuration, in order to adjust the azimuth, the fixing jig 9 is inserted into the slit _6b1 of the special collar 6, and its lower end 9a is inserted into the head base 3. After regulating the rotation of the special collar 6 by fitting into the special collar 6, the special collar 6 can be moved up and down by screwing in or out the azimuth adjustment screw 7 using a screwdriver. Therefore, the head mounting plate 1 that fixes the head 2 is placed at a higher level than the horizontal position, with the fixed part by the screw 5 having the bent part 1a formed on one side thereof at an arbitrary angle θ as a fulcrum. The azimuth of the head 2 is adjusted by compressing the other side against the springiness. To adjust the gear direction, remove the fixing jig 9, then open the slit 6b ₁
If the special collar 6 is rotated by inserting the driver 8 inside and rotating it, the small diameter cylindrical portion 6c of the special collar 6 can be removed.
Since the gear _6c1 provided on the outer periphery of the gear moves the toothing body part 1b that meshes with it, the head mounting plate 1 rotates horizontally to the left or right about the screw 5. The direction of the head can be adjusted. After adjusting the azimuth and gear direction of the head 2 in this way, apply a fixing agent such as adhesive to the heads of the screws 5 and 7 and the contact between the gear wheel 6c ₁ and the gear body 1b. If so, the head 2 can be maintained as an adjuster for azimuth adjustment and gap adjustment.

As mentioned above, the present invention has one end rotatably screwed to the head base and the other end of the head mounting plate made of a spring material, which is attached at an angle so that the other end is always located above the horizontal position. The head mounting plate is rotatably attached to the head base with the azimuth adjustment screw and is urged upward by the spring member, and is engaged with the collar member whose height position is regulated by the azimuth adjustment screw, so the head mounting plate is not affected by the pressing force. In contrast, it exhibits springiness, eliminating the need for an azimuth adjustment spring as in the past, making it possible to omit the installation effort and reduce costs. In addition, since the head direction can be adjusted simply by rotating the collar member, the gap can be adjusted compared to conventional products that operate the azimuth adjustment screw and the head direction adjustment screw installed at a separate location. The work of adjusting the direction is simplified, and since the head mounting plate itself is formed of a single plate, the inconvenience caused when adjusting the azimuth when the screw for adjusting the gap direction is loosened as in the prior art can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a conventional azimuth adjustment mechanism, Fig. 2 is a side view, Fig. 3 is a partially cutaway front view showing a conventional gap direction adjustment mechanism, and Fig. 4 is a partially cutaway front view showing the conventional azimuth adjustment mechanism. FIG. 5 is a partially cutaway front view showing an embodiment of the present invention; FIG. 5 is a perspective view showing the gear when adjusting the gear direction; FIG. 6 is a plan view showing a head mounting plate constituting an embodiment of the present invention; FIG. 8 is a sectional view taken along the line X-X in FIG. 7, and FIG. 9 is a sectional view taken along the line Y in FIG. 7.
It is a sectional view taken along the -Y line. 1...Head mounting plate, 2...Head, 3...Head base, 6...Special collar, 6b...Bulging head, _6b1 , _6b2 ...Slit, 6c...Small diameter cylindrical portion.

Claims (1)

[Scope of utility model registration request] A magnetic head is fixed to the center of a head mounting plate made of a spring material, and one end of the head is rotatably screwed to the head base so that the other end is normally located above the horizontal position, and the azimuth is adjusted. The other end of the head mounting plate is engaged on its upper surface with a collar member that is rotatably attached to the head base with a screw and urged upward by a spring member, and whose height position is regulated by rotation of an azimuth adjustment screw. The other end of the head mounting plate is moved up and down by the vertical movement of the collar member by rotation of the azimuth adjustment screw to adjust the azimuth of the magnetic head, and the rotation of the collar member rotates the head mounting plate. A magnetic head azimuth adjustment and gap direction adjustment mechanism, characterized in that the gap direction of the magnetic head is adjusted by moving the magnetic head.