JPH0352151B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head moving device, and more particularly to a head moving device capable of moving a plurality of head carriages each carrying a head independently or integrally.

For example, in a floppy disk device in which two magnetic disks are driven by one drive device, multiple heads are mounted on one head carriage, and one stepper motor is used to move (seek) them. There is something. If such a structure is adopted, after reading or writing from one magnetic disk, when another magnetic disk is used, the track position of the previous magnetic disk becomes unknown. . To solve this problem, a track position storage circuit is required, resulting in a complicated structure and high cost.

On the other hand, a method has also been proposed in which a plurality of independent head carriages are each equipped with one head, and each head carriage is moved by a separate stepper motor. If this method is adopted, the above-mentioned drawbacks can be compensated for.

The above-mentioned device in which a plurality of heads are mounted on a single head carriage, and the device in which separate heads are attached to a plurality of head carriages and moved by separate motors, are generally different types of devices with completely different mechanisms. It was designed and manufactured.

For this reason, there was a disadvantage that there was no compatibility of parts between the two different types of products, and that there was a lot of waste in design, parts, etc., resulting in high costs.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional head carriages, and allows a plurality of head carriages to be moved together or independently, allowing common parts to be used and reducing costs. The purpose of this invention is to provide a head moving device that can be realized.

In order to achieve the above object, the head moving device of the present invention includes a plurality of head carriages that are movable independently without interfering with each other, a moving means for moving the plurality of head carriages, and a moving means for moving the plurality of head carriages; It is detachable from a plurality of head carriages, and is installed between the plurality of head carriages to move the plurality of head carriages together, and detached from between the plurality of head carriages to move the plurality of head carriages. and a connecting member for moving the head carriages independently, and when the plurality of head carriages are moved together by the moving means, the plurality of head carriages are integrally connected by the connecting member. When the plurality of head carriages are to be moved independently by the moving means, the plurality of head carriages can be moved independently by separating the connecting member from the plurality of head carriages. A unique structure was adopted.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

FIGS. 1 to 3 illustrate an embodiment of the present invention. In the figures, reference numeral 1 indicates a frame of the device, and this frame has stepper motors that are shifted vertically and horizontally. 2 and 3 are configured so that they can be attached independently.

Two guide rods 4 and 5 are horizontally suspended in parallel to the frame 1, and two head carriages 6 and 7 are slidably attached using the guide rods 4 and 5. The head carriages 6 and 7 have complementary shapes and are constructed so that they can move without interfering with each other.

The two head carriages 6 and 7 are formed into a stepped frame shape, as shown in FIGS. 1A and 3, for example, and have a rotationally symmetrical structure.
Guide rods 4 and 5 are slidably fitted into the side walls of each head carriage 6 and 7, which are mounted with their portions facing each other vertically.
The end of one head carriage 6 has a guide block 6a which is slidably fitted into a guide rod 5 which is fitted into the other head carriage 7. The other head carriage 7 also includes a guide block 7a which is slidably fitted into the guide rod 4 into which the head carriage 6 is slidably fitted.

The stepper motors 2 and 3 have pulleys 8 and 9 on their output shafts, respectively, and steel belts 10 and 11 attached to the sides of the head carriages 6 and 7 are wound around the pulleys 8 and 9, respectively. The steel belt 10 has an elongated arm 10a on one side as shown in the developed view shown in FIG.
The other side has a wide arm 10b. The wide arm 10b has a cutout hole 10c through which the elongated arm 10a passes.
is formed. Furthermore, the steel belt 10 is provided with mounting holes 10d, 10e, and 10f. When the elongated arm 10a is passed through the cutout hole 10c, the steel belt forms a loop. The pulley 8 shown in FIG. 1B is fitted into this loop, and a screw (not shown) is inserted into the mounting hole 10d. When screwed in, the center portion of the steel belt 10 is fixed to the pulley 8. Next, both ends of the steel belt 10 are fixed to the head carriage 6 by screwing screws 12 and 13 into the mounting holes 10e and 10f, respectively, and attaching and fixing them to the screw holes 12a and 13a, respectively. In this way, the steel belt 10
is wrapped around the pulley 8, and the mounting hole 10d is
When the pulley 8 rotates, the steel belt 10 rotates depending on the direction of rotation.
The elongated arm 10a and the wide arm 10b are the pulley 8.
The head carriage 6 can be moved along the guide rod 4 by being wound or uncoiled. Similarly, the rotation of the pulley 9 moves the head carriage 7 along the guide rod 5 via the steel belt 11. In this embodiment, pulleys 8, 9 driven by stepper motors 2, 3, steels 8, 9, and steel belts 10, 11 are used as means for moving the head carriage, but of course other means are used. Other means of movement, such as a rack and pinion system, may also be used.

Each head carriage 6, 7 has a
Head arms 14 and 15 are attached as shown in the figure. Each head arm 14, 15 has columns 16, 17 to which springs (not shown) are attached for pressing the magnetic head against a magnetic disk, etc.
is provided.

In the above-described embodiment, the head carriages 6 and 7 are independently driven using different moving means such as stepper motors 2 and 3, pulleys 8 and 9, and steel belts 10 and 11. ing.

On the other hand, when it is desired to move the two head carriages 6 and 7 as one unit, the following procedure is performed.

That is, the connecting member 18 is attached to one of the head carriages 6 as shown in FIG. 1A. The connecting member 18 is bent into an L-shape, and its vertical portion is fixed to the inner surface of the side wall of the head carriage 6. For this purpose, the head carriage 6 has through holes 19, 19 for fixing the connecting member 18 in its side wall, and is fixed by screws 20 fitted into the through holes 19. The other end of the connecting member 18 is bifurcated, into which the head block 7a of the other head carriage 7 is fitted. The two head carriages 6 and 7 are integrally connected via this connecting member 18.

When connected in this manner, the stepper motor 2, pulley 8, and steel belt 10, which are moving means on the head carriage 6 side, are unnecessary and are therefore removed. Of course, screw holes 12a and 13 for fixing the right and left sides of the steel belt 10 with screws 12 and 13 are pre-formed in the side wall of the head carriage 6 in order to maintain compatibility of the parts.

If such a structure is adopted, the moving means on one side of the head carriage 6 can be freely attached and detached, and it is possible to meet the requirements for either integral drive or independent drive of the head carriages.

Of course, a similar structure may be employed on the other head carriage 7 side, the moving means on the head carriage 7 side may be omitted, and a moving means may be provided on the head carriage 6 side to cause the head carriage 7 side to follow.

Since this embodiment is configured as described above,
Both independent drive and integral drive of the head carriage can be selectively realized very easily.

By adopting an independent drive system, it becomes easy to position the heads corresponding to each media such as a magnetic disk, and even if one media is used while the other is used, the head carriages will not interfere with each other. do not have. Furthermore, since the track position can be easily detected, a track position storage circuit is not required, which simplifies the structure, and also simplifies the program and reduces costs. Furthermore, when moving from one media to another, set the track position to ``00'' to confirm the track position.
There is no need to go back.

Furthermore, if an integrated drive system is adopted, only one stepper motor is required as a drive source, which facilitates cost reduction.

By the way, the greatest advantage of the head moving device of the present invention is that it adopts a structure that can satisfy either independent drive or integrated drive system of the head carriage. Therefore, common parts can be realized, and common parts can be used without the need to independently design separate systems, making it easy to reduce costs both in terms of design and the number of parts.

As is clear from the above description, the head moving device of the present invention includes a plurality of head carriages that are movable independently without interfering with each other, and a moving means for moving the plurality of head carriages. It is detachable from the plurality of head carriages, and is installed between the plurality of head carriages to move the plurality of head carriages together, and detached from between the plurality of head carriages to move the plurality of head carriages. a connecting member for independently moving the plurality of head carriages, and when the plurality of head carriages are integrally moved by the moving means, the plurality of head carriages are integrally connected by the connecting member. When the plurality of head carriages are to be moved independently by the moving means, the plurality of head carriages can be moved independently by separating the connecting member from the plurality of head carriages. By adopting a structure like this, the head carriage can be driven both integrally and independently, allowing common parts and being economical in terms of design and number of parts. This method is extremely advantageous, and has the excellent effect of significantly reducing costs.

[Brief explanation of drawings]

The figure explains one embodiment of the present invention.
Figure A is a perspective view showing the structure in case of integral drive;
Figure B is a perspective view illustrating the moving means of the head carriage, Figure 1 C is a perspective view showing the steel belt unfolded, and Figures 2 and 3 are a plan view and side view of the case where the head carriage is driven independently. It is a diagram. 1... Frame, 2, 3... Stepper motor, 4, 5... Guide rod, 6, 7... Head carriage, 8, 9... Pulley, 10, 11...
Steel belt, 14, 15...head arm,
18...Connecting member.

Claims (1)

[Scope of Claims] 1. A plurality of head carriages that are movable independently without interfering with each other; a moving means for moving the plurality of head carriages; and a moving means that is detachable from the plurality of head carriages; , a connection for moving the plurality of head carriages together by being installed between the plurality of head carriages, and moving the plurality of head carriages independently by being removed from between the plurality of head carriages; When the plurality of head carriages are integrally moved by the moving means, the plurality of head carriages are integrally connected by the connecting member, and the plurality of head carriages are integrally moved by the moving means. A head moving device characterized in that the plurality of head carriages can be moved independently by separating the connecting member from the plurality of head carriages when moving the heads independently. .