JPH03214469A - Head positioning device - Google Patents

Abstract

PURPOSE:To attain miniaturization and light weight by arranging recording and reproducing heads at the tip parts of two rocking arms, coupling ring bars to the rear parts of them, driving the rocking arms by driving the ring bars, and performing the positioning of the heads at the tip parts. CONSTITUTION:A current controlled by positioning information written on a concentrical circular track in advance and reproduced with the recording and reproducing head 2 and positioning information supplied from the controller of a memory device is permitted to flow on a driving coil 4 in a magnetic circuit consisting of a permanent magnet 5 and a yoke 6. A power generated by the Fleming's left-hand rule is transmitted to the rocking arms 1, 1a via a link arm 8, link shafts 9, 9a, and they are rocked by almost the same angle centering pivot shafts 3, 3a. Two heads 2, 2a coupled at the tip parts of the arms 1, 1a are moved and positioned at the same angular positions. In such a way, it is enough to prepare only one electromagnetic motor, and the light weight is attained, and it is possible to increase the number of media and to make the medium into high capacity.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a recorder head positioning device in an external storage device of a computer, etc. [Prior Art] Figs. Fig. 6 is a plan view showing a conventional head positioning device shown in, for example, Japanese Patent Publication No. 613-46905. Recording/playback head, 3
, 3b is a pivot axis, which is the center of swing of the swing arm Llb. 4 is a voice coil, 5 is a magnet, . 6, 6b
is a magnetic co-circuit housing that forms a voice coil motor, which is one type of electromagnetic motor. IO is the base of the storage device in which the head positioning device is mounted. The sixth item is an example in which two head positioning devices are mounted symmetrically around the recording medium 7.

Next, the operation will be explained. The recording head 2, 2b connected to the swinging arm 1, 11) outputs a current controlled by the positioning information read from the recording medium 7 and the destination information instructed by the controller of the storage device. By applying the current to the coil 4, the voice coil motor composed of the magnetic circuits 6, 6b and the voice coil 4 applies #1 force to the swinging arm 1, lb rotating around the pivot axis, and this return arm 1, lb k : combined recording/reproducing head 2,
2b for movement positioning control.

[Problem a that the invention seeks to solve]

The conventional oscillating head positioning device was constructed as described above, so in a recording device that uses a large number of stacked recording media, the head for the top surface of the medium and the head for the medium driver rII1 should be placed close to each other. Due to the necessity of the arrangement, the spacing between the heads must be at least twice the height of the head, which hinders the reduction in the thickness of the memory device 1h. In addition, as shown in Figure 6, when two head positioning devices are arranged and the recording and reproducing heads are divided into two sets and mounted on the head positioning device to prevent interference, the media spacing can be reduced. However, it takes up a lot of horizontal space in the storage device, which hinders the miniaturization of the storage device.

Further, in this case, there is a problem that the storage device itself becomes expensive because two expensive voice coil motors are used.

The present invention has been made to solve the above-mentioned problems, and aims to improve the head positioning device for realizing a thin, compact, large-capacity, and inexpensive storage device.

[Means for resolving issues]

The head positioning device according to the present invention is provided with two pivot axes and two swing arms that swing around the respective pivot axes, and a recording head is attached to the tip of each swing arm. The rear ends of each swinging arm are connected by one link rod, and the linkage is completely cut by an electromagnetic converter such as a voice coil motor.

[Effect]

The head positioning device according to the present invention includes:
Attach one pair of downward and upward recording/reproducing slots corresponding to the top and bottom surfaces of one of the multiple stacked media on different m 11 ryomes alternately. That is, the head attached to one movement arm can be set to correspond to the medium of the sound, and one voice coil can be shared by two movement arms.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained with reference to the drawings. 1st
In the figures to FIG. 3, l and 1a are swing arms, 2
and 2a are k recording and reproducing heads attached to the tips of the swinging arms l and la; 3 and 3a are the swinging arms 1;
and a pivot axis that supports the rotation center of la. 4 is a sliding coil, 5 is a Mizuku magnet, and 6 is a yoke, that is, a magnetic circuit, forming an electromagnetic motor. 7 is a recording medium, 8 is a link arm that transmits the force generated by the drive coil 4 to a moving arms l and la, and 9 and 9a are swing arms l and l.
A rotary link shaft connecting link a and link arm 8, IO
is the base of the storage device, and lla is a counterbalance for reducing the wax imbalance around the bipot axis 3a of the swing arm la.

Next, the operation will be explained. Although not shown in the figure, positioning information is written in advance on concentric tracks on the rotating medium and is reproduced by the recording/reproducing head 2.
lf! When a current controlled by the position information given from the controller of the device is passed through the drive coil 4 in the magnetic circuit consisting of the Mizuku magnet 5 and the yoke 6, the force generated by Fleming's left hand side is applied to the link arm. 8 and link shafts 9, 9a to the swinging arms l and la, which swing approximately the same angle about the pivot shafts 3, 3a.

The two heads 2 and 2a connected to the tip of the swinging arm tJa are moved to the same angular position for 1h.
It is decided.

In the above embodiment, two recording/reproducing heads 2 and 2 are used.
This is an example of moving and positioning while maintaining almost the same relative angular position on the recording medium 7. In other words, when the hend 2 is on the inner periphery, the head 2a is also on the inner periphery, and when the head 2 is on the outer periphery, the head 2a is also on the inner periphery. 2a is also located on the outer periphery, as shown in 1m, the oscillating pressure is bent into a +C' shape. On the other hand, as shown in Fig. The arms 1 and lfL are arranged almost parallel, and when one head 2 is on the inner IM, the other head 2a is on the outer periphery, and when one head 2 is on the outer periphery, the other belly button 2a is on the inner periphery. You can also arrange the pots as shown in .

〔Effect of the invention〕

As described above, according to the present invention, it is possible to divide and attach one pair of downward-facing heads and one upward-facing head to two moving arms alternately for each medium, and to perform recording. The interval at which the media are piled up can be reduced, allowing the recording device to be made thinner. Alternatively, if the rotation thickness is 1iJ, the device 1a has the advantage that the total number of recording media that can be loaded can be increased and the width can be increased. In addition, only one magnetic motor such as a voice coil motor is required, and the conventional oscillating type fg equipped with two voice coil motors. It has the advantage that it can be compared to the 1θ fixed iron set.

[Brief explanation of drawings]

Figure 1 is an example of this defense, with a partial cross-section of the cross section; Ill of Figure 1 of Mr. G's Note -
Figure 4 is a collapsed cross-sectional view of an electromagnetic motor showing another example of the invention. It is a 10-sided view showing a device for determining the navel position 1α. In the figure, 1 and Ia are swinging arms, 2 and 2a are recording heads, 3 and 3a are vibond axes, 4 is a drive coil, 5 is a Mizuku magnet, 6 is a yoke or magnetic circuit, and 7 is a recording head. medium, 8
is a link arm, 9 and 9a are link shafts, and IO is a base of the storage device.

Claims (1)

[Claims] In a storage device equipped with a recording/reproducing head that can move arbitrarily on a rotating recording medium, there are two pivot axes, two swinging arms that can rotate around the respective pivot axes, and a device at the tip of each arm. A recording/reproducing head is disposed, and the rear end of each arm is connected to a single link rod through a rotation bearing, and an electromagnetic motor is attached to the approximately center of the link rod. A head positioning device characterized in that two swing arms are simultaneously driven by driving the swing arms to move and position the recording/reproducing head attached to the tips of the swing arms.