JPH0312880A - Head supporting device for flexible disk device - Google Patents

Abstract

PURPOSE:To prevent a damage owing to the collision of a second head slider for a first head slider when large impact force is added to a device by providing a stopper for preventing the excessive rise of an arm. CONSTITUTION:The stopper 14 which is polymn.-fixed to a loading device-side and which prevents the excessive rise of the arm 5 is provided for the contact part of the arm 5 and the loading device 8. Consequently, the excessive rise of the arm when impact force is added to the device can be stopped by the stopper. Thus, the second head slider is prevented from colliding with the first head slider by the reaction of impact, the damage of one or both is prevented and the device of high impact resistance can easily be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to head protection means in a double-sided flexible disk device.

[Prior Art] FIGS. 4 and 5 show a head support device of a conventional flexible disk device. In the figures, (1) shows a flexible disk on which information signals are magnetically recorded, and (2) shows this flexible disk (1). ) The first head slider 1 (3) on the fixed side performs recording and reproduction on the side O side of the flexible disk (1), and the second head slider 1 (4) on the movable side performs recording and reproduction on the side 1 side of the flexible disk (1). ) is a carriage supporting the first head slider (2) at its tip;
) is an arm that supports the second head slider (3) at its free end, (6) is a screw that fixes the opposite ends of the carriage (4) and arm (5), and (7) is an arm (
5) a pressure spring that presses the carriage (4) side, (8)
(9) is a loading mechanism for raising and lowering the arm (5) supporting the flexible disk (1) and the second head slider (3); (9) is a guide rod inserted through the carriage (4) for guiding it; 10) is the carriage (4) located on the opposite side of this guy 1 lot (9).
A needle (Ila) integrally provided on the other side edge is engaged with the needle (10) to move the carriage (4).
a lead screw (12) directly connected to a stepping motor (11) for moving the flexible disc (1) in the radial direction, ensuring the engagement of said needle (10) with the lead screw (lla); The leaf spring (13) is the main body frame on which the loading mechanism (8), guide rod (9) and stepping motor (11) are mounted.

Next, the operation will be explained. Flexible disk (1
) is not installed in a position that allows recording and playback.
As shown in Figure 5, the loading mechanism (8) is attached to the arm (5).
This lifts the first head slider.
(2) and the second head slider (3) are located apart. From this state, when the flexible disk (1) is inserted to a predetermined position between both head sliders (2) and (3), the loading mechanism (8) is activated, holding the flexible disk (1) and lowering it. The flexible disk (1) is held at a position where recording and reproduction are possible. Further, the arm (5) supporting the second head slider (3) descends following the descent of the loading mechanism (8) by the pressure of the pressure spring (7), and slides the flexible disk (1) onto the first. Slider (2) and second head slider (
3) Lower to the position where it can be inserted. In this state, the carriage (4) is moved in the radial direction of the flexible disk (1) by the rotation of the stepping motor (11),
It is positioned on a desired track, and signals are recorded and reproduced by the first and second head sliders (2) and (3) in that 1-rack. A needle (10) is projected, which engages the groove of the lead screw (lla) and converts the rotation of the stepping motor (11) into a linear movement of the needle (10), so that the carriage (4) is guided Slide on the rod (9).

By the way, in such a conventional flexible disk device, the loading mechanism (8) usually lifts up the arm (5) as shown in FIG. 5 and moves the first head slider (2) and second head slider (3). It is carried and transported in a separated position. If an impact force greater than the force of the pressure spring (7) pressing the arm (5) is applied to the device in a direction opposite to the direction in which the pressure spring (7) is pressed during transportation, the arm (5) ) despite the bias of the pressure spring (7), the first head slider (2) and the second head slider (
3) and rise further away from each other. Then, when the impact force disappears, it descends to return to its normal position due to the biasing force of the pressurizing spring (7), but due to inertia, it not only returns to its normal position but also bends the loading mechanism (8) while changing its position. Pass through the second head slider (3)
moves until it collides with the first head slider (2). Then, the restoring force of the loading mechanism (8) works and the arm (5) tries to rise again to its normal position. The arm (5) attenuates the influence of the impact force applied to the device while repeating such lifting and lowering movements.

[Problems to be Solved by the Invention] Since the head support device of the conventional flexible disk device is configured as described above, when an impact force is applied to the device, the first head slider, the second head slider, or both There was a problem in that it was damaged due to repeated collisions.

This invention has been made to solve the above problems, and provides a head support device for a flexible disk device in which the first head slider and the second head slider do not collide even if an impact force is applied to the device. With the goal.

[Means for Solving the Problems] In the head support device for a flexible disk device according to the present invention, the arm is superimposed and fixed on the loading mechanism (8) side at a contact point between the arm (5) and the loading mechanism (8). (5) A stopper (
14).

[Function] In the head support device for a flexible disk device according to the present invention, the stopper prevents the arm from rising excessively when an impact force is applied to the device, so that the reaction of the impact causes the second head slider to move upward. No more collision with the 1-head slider.

[Example] An example of the present invention will be described below. That is, in FIGS. 1, 2, and 3, FIGS. 4 and 5
The same parts as those in the previous version will be given the same reference numerals, and the repeated explanation will be omitted. However, (14) in the figure is on the - side edge of the loading mechanism (8) similar to the above, and the above-mentioned arm ( 5)
The present invention is characterized by its presence as a stopper that prevents excessive elevation of the arms, which are superimposed and fixed in a facing state so as to sandwich the arms from the outside.

Next, specific operations will be explained. When the flexible disk (1) is not installed in a position where recording and playback is possible, the loading mechanism (8) holds the arm (5) as shown in Fig. 2, and this causes the first head slider to (2) and the second head slider (3) are located apart. From this state, the flexible disk (
1) is inserted to a predetermined position between the first head slider (2) and the second head slider (3), the loading mechanism (8) operates, and the flexible disk (1)
, and then hold it in a position where it can be recorded and played back. Also, the arm (5) supporting the second head slider
) is lowered by the pressing force of the pressure spring (7) following the lowering of the loading mechanism, and the flexible disc (1)
is lowered to a position where it is sandwiched between the first head slider (2) and the second head slider (3). In this state, the carriage (4) is moved in the radial direction of the flexible disk (1) by the rotation of the stepping motor (1) and is positioned at a desired track, where the first and second head sliders (2) (3), signals are recorded and reproduced. At this time, a needle (10) is provided protruding from the negative side edge of the carriage (4), and this engages with the groove of the lead screw (Ila). Since the rotation of the stepping motor (11) is converted into linear movement of the needle (10), the carriage (4)
slides on the guide rod (9).

By the way, in the head support device of the flexible disk drive of this invention, the loading mechanism (
8) lifts the arm (5) and moves the first head slider
(2) and the second head slider (3) are separated from each other and transported.

During transportation, if an impact force greater than the force of the pressure spring (7) pressing the arm (5) is applied to the device in the opposite direction to the pressing direction of the pressure spring (7), the arm (5) Despite the bias of the pressure spring (7), the first head slider (2) and the second head slider (3) tend to rise in the direction in which they move further apart. However, in this case, the above arm (
5) is the stopper (14) on the loading mechanism (8)
This prevents the arm (5) from rising excessively, so when the impact force disappears, there is no pressure to return the arm (5) to its normal position (
7) The urging force and inertial force become smaller. Therefore, the second head slider (3) does not move until it collides with the first head slider (2), thus making it possible to attenuate the influence of the impact force applied to the device. In the above embodiment, the case where the stopper (14) is superimposed and fixed as a separate member on the negative edge of the loading mechanism (8) is explained, but it goes without saying that the stopper may be integrally molded into the core part. be.

[Effects of the Invention] As described above, the head support device of the flexible disk device of the present invention includes a step that prevents the arm from rising excessively.
- The collar is provided, so even if a large impact force is applied to the device, it can reliably prevent the second head slider from colliding with the first head slider and damage one or both of them. The effect is that a device with high impact resistance can be obtained by extremely simple means.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the head support device for a flexible disk drive of the present invention, FIG. 2 is a side sectional view thereof, FIG. 3 is an enlarged sectional view of the main parts thereof, and FIG. A plan view showing a head support device of a flexible disk device, and FIG. 5 is a side sectional view thereof. In the figure, (2) is the first head slider, and (3) is the second head slider.
Head slider 1 (4) is a carriage, (5) is an arm, (7) is a pressure spring, (8) is a loading mechanism, (
14) is a stopper. In other figures, the same reference numerals indicate the same parts.

Claims (1)

[Claims] a carriage having a fixed first head slider attached to its tip; an arm resiliently fixed to the other end of the carriage and having a movable second head slider at its free end; and an arm attachment side end of the carriage. A flexible disk supported by a flexible disk, comprising a pressure spring that presses the arm against a carriage, a loading mechanism that raises and lowers the arm, and a stopper that prevents the arm from rising excessively. Equipment head support device.