JPH075583Y2 - Flexible disk device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to improvement of impact resistance in a flexible disk device.

[Conventional technology]

FIG. 2 is a perspective view showing the outer appearance of a conventional flexible disk device, and FIG. 3 is a side view showing the essential structure of the flexible disk device of FIG. In Figure 3, 1,2
Is a recording / reproducing head 3, 3 is an actuator for supporting the recording / reproducing head 1, 4 is an arm for supporting the recording / reproducing head 2, 4a is an arm lifting arm for lifting the arm 4, and 5 is an actuator 4 for the arm 4. Is a fixing screw, and 7 is a lifter for lifting the arm 4.

Next, the operation of the essential configuration of the conventional flexible disk device shown in FIG. 3 will be described. When a recording medium (not shown) is mounted, the lifter 7 is lowered and the recording / reproducing heads 1 and 2 come into contact with the recording medium. In other cases, that is, when the recording medium is not loaded, the arm 4 is lifted upward by the lifter 7 and the recording / reproducing heads 1 and 2 are separated from the recording medium.

[Problems to be Solved by the Invention] Since the above-mentioned configuration of the essential parts of the conventional flexible disk device is configured as described above, the impact load F is downward from the outside as shown by the arrow in FIG. When added to
A rotational moment is generated around the arm lift arm 4a, and the upper and lower recording / reproducing heads 1 and 2 collide with each other.

The present invention has been made to solve such a problem, and it is an object of the present invention to obtain a flexible disk device in which upper and lower recording and reproducing heads are less likely to collide with each other even when a shock load is applied downward from the outside. To aim.

[Means for solving problems]

In the flexible disk device according to the present invention, an arm for supporting one head is provided with an arm lift arm for lifting the arm, and further, an impact countermeasure arm is provided between the arm lift arm and the head. It is a thing.

[Action]

In the flexible disk device of the present invention, since the impact-preventing arm is provided between the arm-lifting arm and the head, the upper head that is generated when an impact load is applied downward from the outside is removed. The rotational moment that approaches the lower head can be suppressed to a small value, and the limit of the impact load applied from the outside such that the upper and lower heads collide can be shifted upward.

〔Example〕

FIG. 1 is a side view showing the configuration of the essential parts of a flexible disk device according to an embodiment of the present invention, and FIG. 4 is an explanatory diagram showing the operation of the essential parts of the flexible disk device of FIG. Reference numerals 1 to 7 and 4a are the same as those of the conventional device shown in FIG. In the figure, reference numeral 4b denotes an impact countermeasure arm provided between the arm lifting arm 4a of the arm 4 and the recording / reproducing head 2. Here, the distance between the recording / reproducing head 2 and the arm lift arm 4a is L, and the distance between the recording / reproducing head 2 and the impact countermeasure arm 4b is l.

Next, the operation of the essential configuration of the flexible disk device according to the embodiment of the present invention shown in FIG. 1 will be described. Here, the case of the related art and the case of the present invention will be compared and described.

In the case of the conventional technique, when the impact load F is applied from the outside in the direction shown by the arrow in FIG. 3, assuming that the magnitude of the acceleration is G and the mass of the recording / reproducing head 2 is M, the recording / reproducing head 2 The weight of is equivalent to MG, and the rotational moment around the arm lift arm 4a is MGL. In the case of conventional technology,
When the above-mentioned rotational moment acts on the recording / reproducing head 2, the recording / reproducing head 2 rotates in the direction of the recording / reproducing head 1 about the arm lift arm 4a, and the recording / reproducing head 1
Was colliding with.

On the other hand, in the case of the present invention, when an impact load F is applied to the recording / reproducing head 2 from the outside, initially a rotational moment MGL is applied as in the case of the conventional technique, and the arm lifting arm 4a is rotated. However, as shown in FIG. 4, the impact countermeasure arm 4b and the lifter 7 eventually come into contact with each other, and thereafter, a rotational moment about the impact countermeasure arm 4b acts on the recording / reproducing head 2. The rotational moment of the recording / reproducing head 2 around the impact countermeasure arm 4b is MGl.

As shown in FIG. 1 and FIG. 4, MGl because l <L
<Because it becomes MGL, the rotational moment acting on the recording / reproducing head 2 after the impact countermeasure arm 4b and the lifter 7 hit is
This is smaller than in the case of the conventional technique, so that the phenomenon that the upper recording / reproducing head 2 rotates and collides with the lower recording / reproducing head 1 is less likely to occur.

In the above embodiment, the case where the shock countermeasure arm 4b is positioned on the upper surface side of the arm 4 has been described, but it may be positioned on the opposite surface side or both surface sides.

[Effect of device]

As described above, according to the present invention, in the flexible disk device, one arm supporting the head is provided with an arm lift arm for lifting the arm, and a shock countermeasure is provided between the arm lift arm and the head. Since the arm is provided, the upper and lower heads are less likely to collide with each other when a shock load is applied downward from the outside, and a flexible disk device capable of significantly improving shock resistance can be obtained. Is played.

[Brief description of drawings]

FIG. 1 is a side view showing an essential configuration of a flexible disk device according to an embodiment of the present invention, FIG. 2 is a perspective view showing an appearance of a conventional flexible disk device, and FIG. 3 is a flexible view of FIG. FIG. 4 is a side view showing the configuration of the essential parts of the disk device, and FIG. 4 is an explanatory diagram showing the operation of the essential parts of the flexible disk device of FIG. In the figure, 1, 2 ... Recording / playback head, 3 ... Actuator, 4 ... Arm, 4a ... Arm lifting arm, 4b ...
… Impact-preventing arm, 5 ... Leaf spring, 6 ... Fixing screw, 7
...... It is a lifter. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. An arm for raising and lowering a pair of upper and lower heads and an arm for supporting each head, and for raising the arm so that the recording medium does not come into contact with the head when the recording medium is inserted into the one arm. A flexible disk device comprising a lift arm and a shock countermeasure arm provided between the arm lift arm and the head.